hh.sePublications
Change search
Refine search result
5678910 351 - 400 of 472
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 351.
    Renner, Samuel
    et al.
    Ecologia e Sensoriamento Remoto, Centro Universitário Univates, Lajeado-RS, Brazil.
    Perico, Eduardo
    Ecologia e Sensoriamento Remoto, Centro Universitário Univates, Lajeado-RS, Brazil.
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Dragonflies (Odonata) in Subtropical Atlantic Forest fragments in Rio Grande do Sul, Brazil: seasonal diversity and composition2013In: Scientia Plena, ISSN 1808-2793, Vol. 9, no 1, article id 012401Article in journal (Other academic)
    Abstract [en]

    One of the most endangered ecosystems in America is the Atlantic Forest, which demands emergency actions to protect its remnants as well its biodiversity. In this situation the species inventory can develop a management role for the future, determining specific areas that should be preserved as well the species composition and richness can be used as an indicator of a healthy ecosystem. The use of dragonfly species composition has proven its potential indication of quality habitats. The Odonata species actually still poorly known in the Neotropical region and has never been used as a tool to analyze the actual conditions of aquatic environments particularly in the Subtropical Atlantic Forest, which occurs in south of Brazil. A systematic survey was carried out in aquatic systems located at remnants of forest from March 2011 to February 2012. A total of 565 specimens belonging to 34 species, distributed in 5 families were sampled. Libellulidae was dominant, with 14 species, followed by Coenagrionidae, Gomphidae, Lestidae and Aeshnidae. Through inventory survey we deepen the Odonata composition knowledge and performed a statistic analysis.

  • 352.
    Renner, Samuel
    et al.
    Centro Universitário Univates, Lajeado, RS, Brazil.
    Périco, Eduardo
    Centro Universitário Univates, Lajeado, RS, Brazil.
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Martins dos Santos, Daniel
    Centro Universitário Univates, Lajeado, RS, Brazil.
    Consatti, Guilherme
    Centro Universitário Univates, Lajeado, RS, Brazil.
    Dragonflies (Odonata) from the Taquari River valley region, Rio Grande do Sul, Brazil2015In: Check List, ISSN 1809-127X, E-ISSN 1809-127X, Vol. 11, no 5, article id 1740Article in journal (Refereed)
    Abstract [en]

    A survey of Odonata was carried out in the central region of the state of Rio Grande do Sul: the Taquari River valley. This region was originally covered by deciduous and Semi-deciduous Atlantic Forest, which today only exist in a highly fragmented environment mainly due to agricultural activities. Our survey was conducted in 12 municipalities from this region, between March 2011 and April 2013. Aiming a general overview of the species composition, our sampling sites included lakes, bogs, small streams and river sections, all inside or surrounded by small forest fragments or forest areas. Fifty species of Odonata were collected comprising 29 genera and seven families. The dominant families were Libellulidae (40%) and Coenagrionidae (36%), while Aeshindae, Gomphidae and Lestidae each only comprise 6% of the total number of species. The findings revealed the presence of a highly diverse odonate assemblage, mainly represented by generalist species in human disturbed fragments and a few forest specialist species in the best preserved remnants only.

  • 353.
    Renner, Samuel
    et al.
    Lab de Evolução e Ecologia, Centro Universitário Univates, Lajeado, RS, Brazil.
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Périco, Eduardo
    Lab de Evolução e Ecologia, Centro Universitário Univates, Lajeado, RS, Brazil.
    Testing Dragonflies as Species Richness Indicators in a Fragmented Subtropical Atlantic Forest Environment2015In: Neotropical Entomology, ISSN 1519-566X, E-ISSN 1678-8052, Vol. 45, no 3, p. 231-239Article in journal (Refereed)
    Abstract [en]

    We surveyed 15 bodies of water among remnants of the Atlantic Forest biome in southern Brazil for adult dragonflies and damselflies to test whether an empirical selection method for diversity indicators could be applied in a subtropical ecosystem, where limited ecological knowledge on species level is available. We found a regional species pool of 34 species distributed in a nested subset pattern with a mean of 11.2 species per locality. There was a pronounced difference in species composition between spring, summer, and autumn, but no differences in species numbers between seasons. Two species, Homeoura chelifera (Selys) and Ischnura capreolus (Hagen), were the strongest candidates for regional diversity indicators, being found only at species-rich localities in our surveyed area and likewise in an undisturbed national forest reserve, serving as a reference site for the Atlantic Forest. Using our selection method, we found it possible to obtain a tentative list of diversity indicators without having detailed ecological information of each species, providing a reference site is available for comparison. The method thus allows for indicator species to be selected in blanco from taxonomic groups that are little known. We hence argue that Odonata can already be incorporated in ongoing assessment programs in the Neotropics, which would also increase the ecological knowledge of the group and allow extrapolation to other taxa. © 2015, Sociedade Entomológica do Brasil.

  • 354.
    RIVERO CÁMARA, FRANCISCO JOSÉ
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    POWER DEVIATION ANALYSIS OF THE ROCKNEBY WIND FARM2015Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Nowadays the globalization and the economy expansion of the emerging countries demand anincreasing amount of energy. Therefore, energy production as well as the efficiency of energyusage, is essential for future developments of societies. Renewable energies appear as a turnkeysolution that could support the growing demands, and at the same time not being harmful to theenvironment [1]. Within the types of renewable energies, wind energy could be considered asone with large potential.In this paper I present the study of a Swedish wind farm placed in Rockneby.Once the wind turbines were installed and working correctly, a discrepancy between the realenergy obtained and the theoretical energy indicated by the manufacturer was detected. Thestored data in the SCADA system were compared with the values provided by the manufacturerand several analyses were performed. Initially an anomaly in the power residual deviation wasdetected. It was showing an unusual behaviour at high wind speeds. The variation of the airdensity in the wind farm at hub height was considered as a possible reason of the disagreementobserved in the power parameters since the reference density used by the manufacturer was aconstant value calculated in laboratory environment. However, this idea was rejected becausethe power generated in both conditions is similar. The pitch angle was analysed after detectinga significant variations in wind speed measurements made by the anemometer in the turbinenumber three. As a result, it was found a pitch variation in the turbine which seems due to afailure in the anemometer. As a final result, the turbulences were analysed giving as aconclusion that the turbulence intensity were situated around 20%. Therefore, I mainly suggestas a possible explanation of this fact the influence of the turbulence accompanied of a badcalibration or failure in the anemometers.

  • 355.
    Ronkainen, Fanny
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Sport-specific interval training for upper-body can improve anaerobic endurance in wrestlers2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Wrestling is an old sport that requires high anaerobic power and capacity to succeed during match. The purpose of this study was to investigate if anaerobic interval training for the upper-body would improve the anaerobic capacity in wrestlers and increase maximum blood lactate. Fifteen wrestlers (eleven male and four female) at high-level in Sweden wrestling participated in the study. The wrestlers where divided into a training and a control group. The training intervention consisted of a sport-specific interval training twice a week for four weeks for the training group and continuation of regular wrestling training for the control group. The participants performed a 30 second arm Wingate anaerobic test (WAnT) to investigate the anaerobic power and capacity pre and post training intervention. Results showed a significant increase in peak power from 7,7±1,1 to 8,9±0,6 W/kg body mass(p=0,02) and mean power from 4,9±0,5 to 5,3±0,5 W/kg body mass (p=0,02), while the fatigue index had significantly decreased at the post-test from 32,6±6,4 to 28,0±6,3 % (p=0,03) in the training group post intervention, indicating improvement in anaerobic power and capacity. There was no significant difference in peak or mean power, or fatigue index in the control group during the same time. No significant difference in blood lactate concentration (LAmax) was observed at post-test in either of the groups. The research suggests that a wrestler could benefit from sport-specific interval training in-season to improve anaerobic power and capacity in upper-body, which can potentiate the capacity to work at higher intensity during longer duration.

  • 356.
    Roos Lundström, Frida
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science.
    Konsten att utveckla attraktiva städer på ett hållbart sätt: Hur kan en trafikreglering påverka innerstaden Göteborg?2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Between the years 2005 and 2015 cars and trucks have increased with 7, 7 percent inGothenburg. This will mean that in 2035 there will be 47 140 more vehicles. 70.000 of the550.000 people in Gothenburg is being exposed by a noise that is over the limit of 55 dBA. Vehicles incomplete combustion of hydrocarbons leads to a number of additional health problems. According to the Swedish transport department, closer to 3000 people dies prematurely in Sweden each year due to traffic air pollution.A measure to prevent and reduce the intense traffic involves emission requirements, congestion and traffic regulations. The city center of Gothenburg will on the first of October 2016 introduce a prohibition for heavy traffic around the area close to Domkyrkan between 11am - 05am a clock. The purpose of this study has been to investigate if a regulation of heavy traffic can be used as an instrument to contribute to a sustainable and environment adjusted city without affect the residents feeling of an attractive city center. On behalf of the municipal entity Traffic office Gothenburg City and the organization Innerstaden Göteborg a customer satisfaction index analysis (CSI) has been done. Performed in order to measure customer satisfaction before the regulation. The CSI model which is a result from this paper will be re-used after the regulation in order to identify the effects of the traffic regulation. CSI is a statistical method built upon indicators (questions) and latent variables (quality factors) related to a set of indicators. CSI is measured by the respondents answering questions through a 1-10 point scale where 1 is the lowest rating and 10 is the highest ratings. There are three standard questions which average rating creates the CSI value: How satisfied are you with the overall environment as it is today?

    How well meets the environment your expectations?

    How well relate this specific area with an ideal inner city environment?

  • 357.
    Rydström, Petter
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Eriksson, Anders
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Skingrad dimma: energikartläggning på Högskolan i Halmstad2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Society's standards and guidelines say that today's buildings shall reduce their energyconsumption to obtain a better energy performance. To make this possible new laws havebeen formulated to ensure that this is the case. Halmstad University (HH) consists of 18building cells, each with has its own unique energy usage. To get an overall image overHH’s energy situation, the values for heating, cooling and electricity have been collected.The task of obtaining these values has been difficult were multiple instances in HH, theenergy provider and the property manager has been consulted. These values have beentreated along the guidelines of the National Housing Board on how the energyconsumption documents should be created. There have been some values that areunobtainable, the reason for this is because several buildings shared the same connectionpoint for heating, cooling and energy, because of this a breakdown of how much energyeach building uses have been impossible to answer. In these situations all of the buildingsenergy consumptions and surfaces have been pooled and then been treated as onebuilding. Further simplification has been made. In some instances many differentcustomers have shared the same connection point even though separate meters for eachcustomer have not existed. On these occasions the energy provider has divided the energyconsumption between the energy customers only with the means of a fixed percentage, adistribution that is perceived as a disincentive to energy efficiency measures.Distributions of this type do not show the actual energy usage in a specific building.When comparing the values obtained from the energy provider and the energyconsumption documents, several errors were found. Some of the building surfaces havebeen switched. Even pure neglections have occurred. The final result shows that HH’sbuildings have higher energy consumption than the documents that society refers to tooensure that the energy performance of each building is known.

  • 358.
    Råsäter, Kristoffer
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Difference in estimated VO2max between the 30-15 intermittent fitness-test and 20-meter shuttle test in amateur floorball-players.2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: Floorball is a sport where not a lot of research have been done, it is a young sport and up until now it has only been played in Europe. The sport is in present days growing rapidly in popularity and is expanding worldwide. Because of the lack of research coaches have little knowledge regarding VO2max testing within the sport. Aim: The aim of the study was to compare results of both a 30-15 intermittent fitness test (IFT) and a 20-meter shuttle test (beep test) and see if there is a difference between estimated VO2max for athletes playing floorball. The hypothesis was that because the 30-15IFT mimics the movement pattern of floorball more than the beep test does, athletes playing this sports should score a higher result in the 30-15IFT. Methods: The study was done on fifteen sub-elite floorball players (8 male and 7 female) aged 20.6 years ± SD 3.5. The test persons performed two aerobic fitness tests, Beep test and 30-15IFT. The beep test consists of a number of 20 meter shuttle runs with increased speeds every minute and the 30-15IFT consists of 30 seconds of running followed by 15 seconds of rest with increased running speed every 45 seconds. A paired sample t-test was used to compare the estimated VO2max results of both tests. Results: Results show that 66% test persons scored a higher result in the 30-15IFT compared to the beep test. However, there was no statistical difference between the two tests.  The players scored a mean value of 48.3 ml/kg/min ± 3.8 during the 30-15IFT and 45.4 ml/kg/min during the beep test ± 5.9, p=0.06 Conclusion: The 30-15IFT is equally as good as the beep test at estimating VO2max in floorball players. A factor that might have affected the results was that the formula for calculating VO2max in the beep test does not take age and weight into consideration while the formula for the 30-15IFT does. In the future, work should be done at “constructing” a new formula for the beep test.

  • 359.
    Rögnvaldsson, Thorsteinn
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Brink, Joachim
    Halmstad University.
    Florén, Henrik
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Gaspes, Veronica
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Holmgren, Noél
    University of Skövde, Skövde, Sweden.
    Lutz, Mareike
    Halmstad University.
    Nilsson, Pernilla
    Halmstad University, School of Education, Humanities and Social Science, Research on Education and Learning within the Department of Teacher Education (FULL).
    Olsfelt, Jonas
    Halmstad University.
    Svensson, Bertil
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Ericsson, Claes
    Halmstad University, School of Education, Humanities and Social Science, Research on Education and Learning within the Department of Teacher Education (FULL).
    Gustafsson, Linnea
    Halmstad University, School of Education, Humanities and Social Science, Contexts and Cultural Boundaries (KK).
    Hoveskog, Maya
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Hylander, Jonny
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Jonsson, Magnus
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Nygren, Jens
    Halmstad University, School of Health and Welfare, Centre of Research on Welfare, Health and Sport (CVHI).
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Sandberg, Mikael
    Halmstad University, School of Education, Humanities and Social Science, Center for Social Analysis (CESAM).
    Benner, Mats
    Lund University, Lund, Sweden.
    Berg, Martin
    Halmstad University, School of Education, Humanities and Social Science, Center for Social Analysis (CESAM).
    Bergvall, Patrik
    Halmstad University.
    Carlborg, Anna
    Halmstad University.
    Fleischer, Siegfried
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Hållander, Magnus
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Mattsson, Marie
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Olsson, Charlotte
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Pettersson, Håkan
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Rundquist, Jonas
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Waara, Sylvia
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Weisner, Stefan
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    ARC13 – Assessment of Research and Coproduction: Reports from the assessment of all research at Halmstad University 20132014Report (Other (popular science, discussion, etc.))
    Abstract [en]

    During 2013, an evaluation of all the research conducted at Halmstad University was carried out. The purpose was to assess the quality of the research, coproduction, and collaboration in research, as well as the impact of the research. The evaluation was dubbed the Assessment of Research and Coproduction 2013, or ARC13. (Extract from Executive Summary)

  • 360.
    Sager, Liselotte
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Ecology and Environmental Science.
    NY VÄGLEDNINGSINFORMATION FÖR GRIS FÖR DJURSKYDDSINSPEKTÖRER2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 361.
    Sahlén, Göran
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Specialists vs. generalists in the Odonata - the importance of forest environments in the formation of diverse species pools2005In: Forests and dragonflies: fourth WDA International Symposium of Odonatology, Pontevedra (Spain), July 2005 / [ed] Adolfo Cordero Rivera, Sofia-Moscow: Pensoft Publishers , 2005, p. 153-179Conference paper (Other academic)
  • 362.
    Sahlén, Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Bernard, Rafal
    Department of General Zoology, Adam Mickiewicz University, Poznan, Poland.
    Rivera, Adolfo Cordero
    Departamento de Ecoloxía e Bioloxía Animal, Universidade de Vigo, EUET Forestal, Campus Universitario, Pontevedra, Spain.
    Ketelaar, Robert
    Dutch Butterfly Conservation / Dutch Society for the Preservation of Nature, Eindhoven, The Netherlands.
    Suhling, Frank
    Institute of Geoecology, Dpt of Environmental System Analysis, Technical University of Braunschweig, Braunschweig, Germany.
    Critical species of Odonata in Europe2004In: International Journal of Odonatology, ISSN 1388-7890, Vol. 7, no 2, p. 385-398Article in journal (Refereed)
    Abstract [en]

    The status of the odonate fauna of Europe is fairly well known, but the current IUCN Red List presents only six species out of ca 130, two of which are actually out of danger today. In this paper we propose a tentative list of 22 possibly declining or threatened species in the region. For the majority, reliable data of population size and possible decline is still lacking. Also 17 endemic species are listed, most occurring in the two centres of endemism in the area: the south-eastern (mountains and islands) and the western Mediterranean. These species should receive extra attention in future updates of the world Red List due to their limited distribution. The extreme variation in biomes and the human exploitation of habitats make conservation planning complicated in Europe. Within the EU, the FFH directive is a working tool aiding conservation. However, the species included do not fully correspond to those on the current Red List, nor to those discussed in this paper. We believe that future conservation efforts should focus on the most valuable and threatened habitats in each sub-region. Active conservation measures could be implemented on a European scale, provided that research will establish a solid ground for such measures. © 2004 Taylor & Francis Group, LLC.

  • 363.
    Sahlén, Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Haase, Susann
    Tech Univ Carolo Wilhelmina Braunschweig, Inst Geookol, D-38106 Braunschweig, Germany.
    Suhling, Frank
    Tech Univ Carolo Wilhelmina Braunschweig, Inst Geookol, D-38106 Braunschweig, Germany.
    Morphology of dragonfly larvae along a habitat gradient: interactions with feeding behaviour and growth (Odonata: Libellulidae)2008In: International Journal of Odonatology, ISSN 1388-7890, Vol. 11, no 2, p. 225-240Article in journal (Refereed)
    Abstract [en]

    It has been shown that life history, behavioural as well as morphological traits vary with the habitats occupied by odonate larvae. Here we ask the following questions: (1) Are the morphological traits, which are associated with perception and foraging, related to the larval habitat? (2) Do these traits influence foraging success and growth rate? We analysed the morphology of species pairs belonging to the genera Crocothemis, Orthetrum and Trithemis; one species in each pair occurring in perennial spring-fed streams, the other able to develop in temporary waters. A PCA reveals four principal components of morphological characters which may be expressed as PC1: prey handling, PC2: visual perception, and PC3 and PC4: density of long and short setae on the feet. The variances of PC1, PC2 and PC3 were affected by phylogeny. PC1, PC2 and PC4 differed between habitats. Species of perennial springs had larger values for visual perception. These waters are clear and larger eyes should be beneficial. But, a high PC2 value was associated with low growth rate and did not affect foraging success. We therefore conclude that investment in better sight made by perennial water species may reflect the need of avoiding predators. Development in temporary waters mainly requires rapid growth and species may not be capable to invest also in visual perception. PC1 was negatively correlated with foraging behaviour and PC3 was positively so. This indicates the importance of prey capture mode to foraging success, which may, however, not translate into a higher growth rate.

  • 364.
    Sahlén, Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Hedström, Ingemar
    Boston University, College of Arts and Sciences, Boston, MA, USA.
    The larva of Mecistogaster linearis, with notes on its abundance in lowland rainforest of Costa Rica (Odonata: Pseudostigmatidae)2005In: International Journal of Odonatology, ISSN 1388-7890, Vol. 8, no 1, p. 59-66Article in journal (Refereed)
    Abstract [en]

    The larva of Mecistogaster linearis is described and illustrated from specimens collected within or near the Río Dantas Wildlife Refuge at the north-western border of the Barbilla National Park on the Costa Rican Caribbean slope. Characters of F-0 larvae permit easy separation from Megaloprepus caerulatus, a species coexisting with M. linearis. Diagnostic characters include overall colour, shape of head, prementum and caudal gills. Exuviae may be determined using shape of mandibles. Two types of branched setae are present on tibiae and tarsi. Most are 3-branched but on front tarsi they are instead feather-shaped. It is suggested that these setae are used for eye-cleaning. M. linearis was a relatively rare but regularly occurring species in the study area throughout the 3-year study period. © 2005 Taylor & Francis Group, LLC.

  • 365.
    Sahlén, Göran
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Kalkman, Vincent J.
    Boudot, Jean-Pierre
    Bernard, Rafał
    Conze, Klaus-Jürgen
    De Knijf, Geert
    Dyatlova, Elena
    Ferreira, Sónia
    Jovic, Miloš
    Ott, Jürgen
    Riservato, Elisa
    European Red List of Dragonflies2010Report (Other academic)
    Abstract [en]

    The European Red List is a review of the conservation status of c.6,000 European species (mammals, reptiles, amphibians, freshwater fishes, butterflies, dragonflies, and selected groups of beetles, molluscs, and vascular plants) according to IUCN regional Red Listing guidelines. It identifies those species that are threatened with extinction at the regional level – in order that appropriate conservation action can be taken to improve their status. This Red List publication summarises results for European Dragonflies.

  • 366.
    Sahlén, Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Suhling, Frank
    Institut für Geoökologie, Technische UniversitätBraunschweig, Braunschweig, Germany.
    Martens, Andreas
    Institut für Biologie und Schulgartenentwicklung, Pädagogische Hochschule Karlsruhe,Karlsruhe, Germany.
    Gorb, Stanislav N.
    Zoological Institute: Functional Morphology and Biomechanics, Kiel University, Kiel, Germany.
    Fincke, Ola M.
    Ecologyand Evolutionary Biology Program, Department of Biology, University of Oklahoma, Norman, OK, U.S.A..
    For consistency’s sake? A reply to Bybee et al.2016In: Systematic Entomology, ISSN 0307-6970, E-ISSN 1365-3113, Vol. 41, no 2, p. 307-308Article in journal (Refereed)
  • 367.
    Salomonsson, Angelica
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Utveckling av medicintekniskt instrument för mätning av muskelstyrka2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta examensarbete inom biomekanik var ett produktutvecklingsprojekt av ett medicintekniskt instrument för mätning av statisk muskelstyrka i lårmuskulaturen (quadriceps). Instrumentet utvecklades med utgångspunkt från instrumentet Stig Starke som blivit föråldrat och förfallet. Stig Starke nyttjas främst av sjukgymnaster på Sahlgrenska universitetssjukhuset med syfte att exempelvis utvärdera effekter av sjukgymnastisk behandling. Behovet av en ny version av instrumentet är stort både inom kliniskt arbete och inom forskning. En ny version av instrumentet skulle hjälpa sjukgymnaster och forskare till att kunna fortsätta mäta muskelstyrkan i quadriceps på ett snabbt och enkelt sätt.

    Syftet och målsättningen med detta examensarbete var att utveckla Stig Starke-instrumentet så att mätningar av maximal statisk styrka i lårmuskulaturen (quadriceps), i enheten Newton, kan göras på patienter inom sjukvård och rehabilitering. En problemanalys i form av Workshop gjordes hos användarna på Sahlgrenska universitetssjukhuset. Problemanalysen tillsammans med en förstudie lade grunden för koncept i form av krav och önskemål till nya versionen av instrumentet. Önskemål på användarvänlighet av instrumentet och standardisering av patientens kroppsposition stod högt i prioritering.

    Via dynamisk produktutveckling och biomekaniska metoder där användarna (sjukgymnasterna) var i fokus kunde ett koncept väljas ut och tillverkas till en funktionell prototyp. Sex nyckelord för arbetet är quadriceps, muskelkraft, instrument, antropometri, användarvänlighet och standardisering. Funktionella prototypen visade via produktutvärdering att goda utvecklingsmöjligheter finns för den nya versionen, då den visade på hög användarvänlighet och standardisering. Behovet av en ny version av instrumentet kommer att finnas kvar tills ett likvärdigt instrument som Stig Starke kan tillämpas i verkligheten. 

  • 368.
    Selamis, Henrik
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Jämförande livscykelinventering2010Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
  • 369.
    Sernhed, Kerstin
    et al.
    Department of Energy Sciences, Lund University, Sweden.
    Lygnerud, Kristina
    IVL Swedish Environmental Research Institute, Gothenburg, Sweden.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science. Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Synthesis of recent Swedish district heating research2018In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 151, p. 126-132Article in journal (Refereed)
    Abstract [en]

    In Sweden, district heating meets currently above half of the heat demands in buildings. District heating research in Sweden has a long tradition dating back to 1975. The latest research program period included 34 projects and was executed between 2013 and 2017. In this paper, a synthesis is performed on the Swedish research frontier by assessing these recent research projects. The three study purposes was to provide an overview over the executed projects, to identify new research questions, and to identify future challenges to the Swedish district heating industry. The assessment was based on six defined key areas, such as demand, resources, system frameworks, technology, cold supply, and international perspective. The subsequent content analysis was performed from three perspectives: the perspective of energy system transition, the customer perspective, and the sustainability perspective. Final conclusions include the three future challenges for the Swedish district heating industry. These are future strategies to communicate the value of district heating, vision for district heating beyond the transition to fossil free supply, and technology development for efficient use of low temperature heat sources. © 2018 Elsevier Ltd

  • 370.
    Sidén, Göran
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Development of New Wind Power in Falkenberg2010Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Within Energy in Minds H-Uni has made a scientific study of the technology, practicability and potential of running cogeneration plants fuelled with rape-seed oil on farms and rural industries. As the cost for the made investigations were lower than planned, three additional studies on topics and activities carried out within Energy in Minds has been made.Within Energy in Minds the municipality of Falkenberg has realized 5 new turbines of 2.3 MW each by the sea shore of Falkenberg. This wind power park gives valuable experience for the planning of the future expansion of wind power, especially for the planned off-shore park with 30 turbines som e 8 km out in the sea.Falkenberg has since the 80-ties actively contributed to the utilisation of wind power in Sweden, both in terms of careful planning of where and how wind turbines should be placed in the landscape but also in terms of participating in the technical competence and manufacturing of turbines.

  • 371.
    Sidén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Förnybar energi2008 (ed. 1)Book (Other academic)
    Abstract [sv]

    Förnybar energi är ett område i snabb utveckling. I världen har den årliga ökningen varit mer än 20 % åren 2002-2006 för till exempel solceller, vindkraft, biodiesel och geotermisk värme. Utvecklingen är driven av klimatfrågan, där förnybar energi ger en minskning av klimatgaserna. Men förnybar energi är även inhemsk och långsiktigt hållbar och kan öka tryggheten samt begränsa kostnadsökningarna, när tillgången av ändliga fossila energikällor minskar.

    Inom EU finns målet 20 % förnybar energi år 2020, en tredubbling. Sverige är ledande på förnybar energi. År 2006 täcktes 40 % av energianvändningen i vårt land av förnybar energi, men målet för 2020 är 49 %. Den starka efterfrågan har gett en kraftig industriell och ekonomisk tillväxt. Företagen som satsar på förnybar energi har en god utveckling och 10 000-tals nya arbetstillfällen skapas.

    Förnybar energi ger en bred översikt över den teknik som finns för olika förnybara energikällor och vilka möjligheter det finns att uppfylla samhällets mål. (Text från förlaget) © Studentlitteratur

  • 372.
    Sidén, Göran
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Utveckling av nya vindkraftverk i Falkenberg2010Report (Other (popular science, discussion, etc.))
  • 373.
    Sidén, Göran
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Hylander, Jonny
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Winkler, Charlotta
    Danmarks Tekniska Universitet, Lyngby, Danmark.
    Stenqvist, Christian
    Lunds tekniska högskola, Lund, Sverige.
    100 procent förnybar elenergi år 2020 – 2025 – 2030?2016Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Rapporten beskriver möjligheterna  att ställa om Sveriges elförsörjning till 100 procent förnybart i tre olika tidsperspektiv, fem, tio eller femton år.

    Scenarierna är genomförbara. Kostnaden för elproduktion från nya anläggningar för sol- och vindkraft är redan idag eller kommer snart att vara lägre än kostnader för energi från nya anläggningar för den fossilkraft eller kärnkraft som ska ersättas. Detta gäller i synnerhet om man tar hänsyn till de så kallade externa kostnaderna. Externa kostnader är kostnader för klimatpåverkan, kemiska och radioaktiva rutinutsläpp och stora olyckor som belastar samhället, men som inte betalas direkt av elproducenterna. Framtidens el från förnybar energi kan framställas till lägre kostnad än den vi har för dagens energiförsörjning.

  • 374.
    Sigurd, Christer
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Hur kommer elbilar och förnybara energikällor påverka vår framtida elproduktion?2010Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Att vi behöver göra något åt rådande miljösituationen är det få som tvekar på. Elbilar kommer mer och mer som ett alternativ till de konventionella fordonen och det satsas mycket på förnybara energikällor.

    Med en introduktion av elbilar i samhället kommer behovet av elenergi att öka. Inledningsvis kommer elbehovet endast påvekas marginellt och genom att ladda under nattetid när elkonsumtionen är låg kommer nuvarande produktion att räcka ända fram till att hälften av vår fordonsflotta är elektrifierad. När sedan antalet bilar ökar ytterligare krävs en förändring för att klara av det ökade behovet av elenergi. Med den potential våra förnybara energikällor har så visar denna rapport att det kommer klaras av gott och väl. Att köra våra elbilar på förnybar energi har också fördelen att utsläppen i princip blir lika med noll, vilket skapar mervärden. Elbilen blir inte renare än elen som den körs på är.

    Redan idag är en mycket stor del av vår elproduktion från förnybara energikällor. Vattenkraft står för ca 46 % av elproduktionen sett ur ett perspektiv på 11 år. Sedan finns ett planeringsmål att år 2020 ska det produceras 30 TWh från vindkraft i Sverige (idag 2,5 TWh) vilket skulle räcka som energi till både alla våra bilar samt att exportera "grön el" ut i Europa.

  • 375.
    Sjögren, Pontus
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Wåhlin, Henrik
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Solenergi i Tranemo: En utvärdering av solenergins potential i Tranemooch andra mindre kommuner.2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Runt om i världen ökar produktionen av elektricitet från solenergi och Sverige är inget undantag. Här uppnår däremot solelens andel av totala elproduktionen mindre änen promille. I denna rapport har vi därför utvärderathur mycket potentiell takyta som finns att tillgå i Tranemo kommun. För att evaluera detta har det gjorts en fältstudie tillsammans med samarbetspartnern Tranemo kommun där företag och kommunala byggnader undersökts. Därifrån har takytors area, lutning och väderstreckdokumenterats för att med vår egenkonstruerade beräkningsmodell uträknalämpligheten för platsen. I beräkningsmodellen behövs endast treindataför att kunna räkna ut ett ungefärligt värdepå solinstrålningen mot en vinklad yta. Dessaär platsens koordinater samt ytans lutning och vädersträck. För ett mer precist värde är molnighetsgrad nödvändigt för platsen. Vi har dokumentera en yta på 116000m2för solceller vilketkan utgöra 7 % av det årligaelbehovet i Tranemo, men endast en mindre delpå 46000 m2användbar ytaanser vi idag vara lämpliga. Det finns dock mycket mer yta att tillgåeftersom siffrorna endast är baserade påkommunala byggnader och företag.Delämpligaytorna kan bidra med en elproduktion på 6,74 GWh, motsvarande 3 % av Tranemos årliga elanvändning. Som kontrast har Sverige i dagsläget också en potential på ungefär 3 %. Kommunens potential är följaktligen näramedelvärdet för landet, vilket skulle påvisa goda möjligheterför solenergi.

  • 376.
    Sporrong, Kristofer
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Ringvall, Angelica
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Pettersson, Per-Johan
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Smarta lokala energisystem, Vision-Teknik-Tillämpning2013Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The energy sector is facing an impending paradigm shift. Today’s technology enables the end-user to generate their own energy locally at home. Furthermore, recently developed storage technologies make it possible to balance energy demand with stored energy and integrate district heating with the local power grid. This means that in the future heat and electric power will interact and energy flows is converted over energy boundaries. This places high demands on the energy systems dynamic and adaptive functions as a whole. Distributed System Operator (DSO) will therefore need to transform the local energy system, which requires initial investment of energy technology and intelligent system solutions that are technically efficient, flexible, and economically viable.Halmstad Energi och Miljö (HEM) owns a local energy system that is well prepared to implement the vision of a sustainable energy system. The city of Halmstad has politically established that renewable energy will play a more crucial role in the future. A greater proportion of "locally-generated" renewable energy will be implemented in this reference system that includes about 60 000 inhabitants, a great number of different heating/cooling customers and 40,000 electricity customers.In the future, it will be required by HEM to integrate intelligent energy solutions, where energy consumers are increasingly micro generation and able to control their energy demand patterns according to the most economical forecast. The local energy system needs to be able to handle a larger share of intermittent electricity from solar, wind or hydropower that can automatically interact with thermal energy from biomass and waste in a flexible, efficient and economical manner. The project group therefore advice HEM to urgently take steps to reserve the rights to a future aggregator role within the municipality. For this to be possible, new business models and contracts are examined within the energy branch.This master thesis provides suggestions for an appropriate mix of energy that can be achieved by 2030 for the reference system. The proposed energy mix generates 20% of the electricity demand and 100% heat production (except peak load) locally from Renewable Energy Sources (RES) according to local political goals. It also provides suggestions for alternative technological configurations where electricity and district heating systems interact across system boundaries.

  • 377.
    Stevens, DR
    et al.
    Department of Biology, University College London, UK.
    Atteia, A
    Department of Plant Physiology, Botanical Institute, Göteborg University, Sweden.
    Franzén, Lars-Gunnar
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Plant Cell Biology: Energy transduction in plant cells.
    Purton, S
    Department of Biology, University College London, UK.
    Cycloheximide resistance conferred by novel mutations in ribosomal protein L41 of Chlamydomonas reinhardtii2001In: Molecular General Genetics, ISSN 0026-8925, E-ISSN 1432-1874, Vol. 264, no 6, p. 790-795Article in journal (Refereed)
    Abstract [en]

    Although most eukaryotic cells are sensitive to the 80S ribosome inhibitor cycloheximide (CYH), naturally occurring CYH resistance is widespread amongst yeast species. The primary determinant of resistance appears to be a single residue within ribosomal protein L41; resistance is acquired by the substitution of a conserved proline (P-56) by a glutamate residue. We have isolated the L41 gene (RPL41) from the green alga Chlamydomonas and investigated the molecular basis of CYH resistance in various mutant strains. In both the wild-type strain and the mutant act-1, a proline is found at the key position in L41.; However, analysis of six independently isolated act-2 mutants reveals that all have point mutations that replace the proline with either leucine or serine. Of the two changes, the leucine mutation confers significantly higher levels of CYH resistance. This work identifies the ACT-2 locus as RPL41 and provides a possible dominant marker for nuclear transformation of C. reinhardtii.

  • 378.
    Stigaeus, Patrik
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Soror, Patrik
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Överensstämmelse mellan två olika uthållighetstest hos unga handbollsspelare - Cooper Test vs. Yo-Yo Intermittent Recovery Test.2011Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [sv]

    Introduktion. Handboll är en olympisk gren som spelas internationellt, men främst i Europa. Idrotten ställer höga krav på både aerob och anaerob metabolism. Syfte. Syftet med studien var att studera överensstämmelsen mellan Cooper Test (CT) och Yo-Yo Intermittent Recovery Test Level 1 (YYIR1) för unga handbollspelare. Dessutom om möjligt även studera spelpositionens betydelse för utfallet. Metod. 56 unga handbollsspelare bjöds in att deltaga i studien. Deltagarna utförde CT och YYIR1 och överensstämmelsen mellan testerna studerades med hjälp av Spearmans korrelationskoefficient (rs). Resultat. 11 män och 10 kvinnor deltog i studien. Resultatet visade på en god överensstämmelse mellan CT och YYIR1 för gruppen som helhet (rs = 0,79, p = < 0,001). Ingen slutsats kunde dras utifrån spelarnas position och resultaten av de båda testerna. Indelat efter kön skiljde sig överensstämmelsen för män (rs = 0,28, p = 0,4) och för kvinnor (rs = 0,61, p = 0,06). Slutsats. Överensstämmelsen mellan CT och YYIR1 var god på gruppnivå och därför skulle testerna kunna vara utbytbara. Men eftersom det fanns en tydlig skillnad mellan könen krävs större studier.

  • 379.
    Strand, John A.
    et al.
    Hushållningssällskapet i Halland.
    Feuerbach, Peter
    Hushållningssällskapet i Halland.
    Svensson, Jonas
    Länsstyrelsen i Hallands län.
    Vartia, Katarina
    Länsstyrelsen i Hallands län.
    Kindt, Torsten
    Laholms kommun.
    Kling, Johan
    Havs- och vattenmyndigheten.
    Henriksson, Annika
    Agellus.
    Joelsson, Arne
    Länsstyrelsen i Hallands län.
    Edenman, Gunnar
    Aquarius-projektet.
    Hansson, Anna
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Weisner, Stefan
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Erlandsson, Gert
    Region Halland.
    Markägare som vattenförvaltare i ett förändrat klimat2012Report (Other academic)
  • 380.
    Strand, John A.
    et al.
    Hushållningssällskapet Halland.
    Weisner, Stefan
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Kävlingeåprojektet – utvärdering av etapp I-III: Rapport på uppdrag av Programberedningen för Kävlingeåprojektet2010Report (Other academic)
  • 381.
    Strand, John A.
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Weisner, Stefan
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Vegetationsförändringar i Vänern - steg två: Projektplan för att utreda orsaken till igenbuskningen av skär och stränder samt dynamik hos vattenvegetationen2002Report (Other academic)
  • 382.
    Strand, John A.
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Wetland Research Centre.
    Weisner, Stefan E. B.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Wetland Research Centre.
    Combating eutrophication of the sea and enhancing biodiversity of the agricultural landscape: experiences from wetland creation in Sweden2011Conference paper (Other academic)
  • 383.
    Strand, John A.
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Weisner, Stefan E B
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Effects of wetland construction on nitrogen transport and species richness in the agricultural landscape – experiences from Sweden2013In: Ecological Engineering: The Journal of Ecotechnology, ISSN 0925-8574, E-ISSN 1872-6992, Vol. 56, p. 14-25Article in journal (Refereed)
    Abstract [en]

    Constructed wetlands, have been used to decrease nitrogen transport from agricultural catchments to the coast of Sweden, while simultaneously contributing to increased species richness in the landscape. The purpose of this paper is to compile and evaluate data that have been produced in Sweden during some 20 years of using constructed wetlands as an environmental tool. To evaluate effects of different stated objectives for constructed wetlands within different national support systems we focus on nitrogen removal and bird and amphibian species richness. Continuous automatic water sampling for nitrogen removal measurements, during 1.5 to 10 years, has been performed in 7 constructed wetlands located in agricultural catchments in southern Sweden. Nitrogen removal per wetland area varied between wetlands but the results imply that an annual removal of at least 1000. kg. N per ha wetland area can be achieved in individual wetlands. Data from the long-term monitoring of the 7 wetlands, together with nitrogen removal data in the literature, were used to model >150 randomly selected constructed wetlands. According to the modeling, the nitrogen removal per created wetland area varied markedly between different wetland creation programs and was generally considerably lower compared to what can be achieved in individual wetlands. Cost-efficiency of nitrogen removal in wetland creation programs can be increased considerably with improved planning and if other desired benefits (e.g. species richness) contribute to share the costs for wetland creation. The effects of constructed wetlands in Sweden on species number and populations of wetland birds and amphibians were large enough to positively affect the occurrence of species in the national red list, i.e. on a national population level. Species richness of wetland breeding birds in the constructed wetlands were relatively stable after 13 years, but different functional groups had very different succession pattern. The mean maximum breeding bird species number in the wetlands occurred after 3.8 years. Wetland birds and amphibians colonized constructed wetlands irrespective of the original objective of the wetland (nitrogen removal or biodiversity). However, some amphibian species showed preference for biodiversity wetlands. There were clear effects of wetland construction on the regional populations of non-wetland bird species. The maximum species number for a given wetland size was found to be higher than previously reported. The analyses show that wetland construction can be a cost effective method for decreasing transport of diffuse pollution from arable land, and that the wetlands are important for the species numbers and population sizes on all spatial scales. © 2013 Elsevier B.V.

  • 384.
    Strand, John A.
    et al.
    The Rural Economy and Agricultural Society of Halland, Lilla Boslid, Eldsberga, Sweden .
    Weisner, Stefan E.B.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Phenotypic plasticity – contrasting species-specific traits induced by identical environmental constraints2004In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 163, no 3, p. 449-451Article in journal (Refereed)
    Abstract [en]

    Can it be assumed that a specific environmental constraint imposed on different species leads to a convergence in, for example, morphology? A phenotype expressed in response to external stimuli (e.g. size-reduction in response to mechanical stress) should be adaptive regardless of species – this is largely intuitive, but has been poorly studied. In this issue (pp. 651–660), Puijalon & Bornette reveal exciting new data that suggest that phenotypic plastic responses to identical environmental constraints may indeed be species-specific (Puijalon & Bornette, 2004).

  • 385.
    Strandell, Eva
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Tränings-och nutritionsanalys av ryttare: En kartläggning av elitryttare/kuskar och A-tränare2012Report (Other academic)
    Abstract [sv]

    Inledning

    Kunskap om olika personers näringsintag och grad av fysisk aktivitet utgör ett viktigt underlag för att kunna arbeta med hälsofrågor och för att kunna sätta dessa i relation till de aktuella rekommendationerna.

    Ryttare, kuskar och tränare på elitnivå inom hästsport måste vara minst lika mån om sin fysiska och psykiska hälsa som andra elitidrottskvinnor och män, men få vetenskapliga studier ha genomförts på dessa atleter. Syftet med förliggande studie var att undersöka vanor hos ryttare, kuskar och tränare på elitnivå vad gällde fysisk aktivitet, kost, alkoholintag samt livskvalitet. Finansiering av projektet skedde via det statliga institutet VINNOVA i samarbete med företaget Eclipse Biofarma AB.

    Metod

    Validerade enkätfrågor, de flesta tagna från ”Nationella folkhälsoenkäten”, skickades ut till utvalda ryttare, kuskar och tränare. Studien kom att omfatta 72 personer. Enkäten som skickades ut innehöll totalt 62 frågor.

    Totalt 33 personer svarade på hela enkäten, vilket motsvarar en svarsfrekvens på 46 %. Svaren gavs av 44 % män respektive 56 % kvinnor.  De som valt att svara hade ett åldersspann mellan 21 till 66 år eller äldre, där majoriteten, 66 %, var 41 år eller äldre.

    Resultat och diskussion

    Den studerade gruppen hästsportmänniskor verkade vara väl upplysta om kostens och motionens betydelse för god hälsa och goda idrottsprestationer.

    Antalet personer som utför fysiskt arbete i form av stallarbete var 23 stycken (72 %).  Det verkar som om de flesta utövare inser vikten av ytterligare fysisk träning utöver den med hästarna men att det är svårare att hitta motivation och tid till sådan träning. De flesta, 71 %, av de som svarat ville försöka öka sin fysiska aktivitet och en tredjedel av dessa ville gärna få stöd för att göra det. Att tävla 22 dagar per år eller mer, som 12 personer i studien gjorde, kräver en bra fysik av utövaren. En kropp som utsätts för hårt fysiskt arbete måste få chansen att återhämta sig emellanåt. Att få tid med återhämtning vid arbete med hästar kan vara svårt, det är omöjligt att låsa dörren och gå hem och vila över helgen. Gruppen hade uppseendeväckande mycket besvär med värk i leder och muskler och åt därför en hel del smärtstillande mediciner. Detta är en viktig notering väl värd att tas på allvar. Ensidigt tungt arbete och mycket ansvar kan vara orsaken. Hästsportmänniskor sätter hästens välbefinnande i centrum, står ut med egna besvär och behandlar dessa med hjälp av värktabletter, utan att ta sig tid och pengar att gå till botten med grundproblemet. Återhämtning, regelbunden träning med väl utvalda rörelser, medvetenhet om hur man ergonomiskt rätt utför olika typ av stallarbete och träning, massage, rätt kost vid rätt tidpunkt skulle förmodligen kunna rätta till grundproblemet till stor del. Några av respondenterna upplevde att de var trötta och här kan även kosten och måltidsmönstret ha betydelse.

    Hälsotillståndet bedömdes av alla svarande vara någorlunda, bra eller t o m mycket bra. Nästan alla, 94 %, hade på det hela taget, känt sig någorlunda lyckliga de senaste veckorna resterande två personer hade känt sig mindre lyckliga än vanligt. Fyra personer hade dock upplevt mer än 8 dagars stress, nedstämdhet eller oro under den senaste månaden och 16 personer kände sig ganska mycket (3 personer) eller i viss mån (13 personer) stressade vid tiden för ifyllandet av enkäten.  Att få arbeta med sitt största intresse ger dock förmodligen många en upplevelse av livskvalitet.

    De som svarat på enkäten verkar ha förstått vikten av att äta någorlunda regelbundet och att frukosten är viktig, alla deltagarna åt frukost och lunch minst 3 ggr per vecka och de flesta (90 %) åt frukost och lunch alla dagar i veckan. Trötthetskänslan, som vissa respondenter kände, skulle dock kunna bero på att energiintaget inte fördelats optimalt. Kolhydratbehovet ökar vid hård träning, en generell rekommendation är ett intag på ca. 8-10 g/kg kroppsvikt. Rekommendationerna är att äta kolhydrater och protein senast 30 minuter efter avslutad fysisk träning. Att ersätta vätskeförlusten under träning är också viktigt, rent vatten är bäst men det finns forskning som visat att tillsats av lite kolhydrater (vanligt socker) och salter, ökar prestationsförmågan vid idrottsutövning.

    De livsviktiga fettsyrorna EPA och DHA (Omega 3) förekommer framför allt i fet fisk och detta är ett kostval som allt för många respondenter, elva stycken, nästan aldrig intog. Det viktigaste är att få i sig DHA-fettsyror då EPA kan bildas från DHA. Av studien går det att utläsa en viss medvetenhet om vikten av att inta dessa essentiella fettsyror då flera personer åt kapslar innehållande Omega 3 eller fiskolja. Av de 42 % som intog någon form av kosttillskott var det 26 % som gjorde det dagligen eller nästan dagligen och resterande 15 % intog kosttillskottet några gånger i veckan eller mer sällan. En del individer i den studerande gruppen hade lågt intag av fisk- och mjölkprodukter. Detta sammantaget med årstiden skulle kunna indikera på att vissa av personerna också hade för lågt intag av D-vitamin.

    Den undersökta gruppen tycktes medvetna om fördelen med att äta frukt, grönt och bär. En av anledningarna till att öka sitt intag av färska grönsaker och frukter är bl.a. att de innhåller flera vitaminer, viktigt kalium samt ett antal olika fytokemikalier som bevisats vara hälsofrämjande. Den studerade gruppens intag av färska frukter och grönsaker kunde ökas och flera i gruppen hade även denna önskan.

    De flesta i den studerade gruppen verkade ha god kontroll på sitt alkoholintag. Av de som intog alkohol ville dock tre personer minska sin alkoholkonsumtion. De tre som ville gå ner i konsumtion trodde att de klarar detta utan stöd.

    Trots vissa brister i  kosthållningen så visar undersökningar, likt denna,  att de flesta får i sig tillräckligt med näringsämnen med maten. Vissa grupper kan dock behöva kosttillskott i olika perioder i livet. Fysisk aktivitet är också en viktig ingrediens för att bibehålla god hälsa.

  • 386.
    Stykova, Katarina
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    The Validity and Reliability of Tests Aiming to Assess Core Stability in Healthy Subjects: A Literature Search2013Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: Measuring core stability (CS) is a commonly performed procedure among health care professionals, fitness trainers and coaches. According to literature, up to date, there is no widely accepted, valid and reliable assessment of CS in healthy subjects. However, no systematic review offering detailed view of measurement properties of CS tests is available. Consequently, learning more about validity and reliability of the commonly used tests aiming to assess CS in healthy people will help in decision making which test to incorporate when testing a client or conducting a study.

    Aim: To study validity and reliability of tests aiming to assess CS in healthy subjects based on a structured literature search.

    Methods: Literature search was performed in Medline, PEDro and Sport Discus databases up to March 2013. Criteria to assess the quality of the methodology studies and the measurement properties were adapted from a previous systematic review of performance-based measures.

    Results: Thirty-one articles of 2677 fulfilled selection criteria and offered reports on validity and reliability about 44 tests aiming to assess CS in healthy subjects including 12 strength, 13 endurance, 9 neuromuscular, 7 task-specific (“functional”) tests and 3 tests assessing power component of CS. Validity of 23/44 tests was reported in 12 articles – construct validity was reported for 13/44 tests, criterion validity for 2/44 tests and concurrent validity for 7/44 tests. In 24 articles reliability of 41/44 tests was reported - test-retest reliability was reported for 28/44 tests, intra-rater reliability for 13/44 tests and inter-rater reliability for 22/44 tests. Only 2% of all ratings were positive and 9% were negative. Evidence for most measurement properties reported in this study remained unknown because there was no information available (63%) or it was indeterminate (26%) and need further exploration. Based on the present information, the extensor dynamic endurance test and the double leg lowering test without the use of pressure biofeedback unit were the best rated tests. The single leg squat, the plank, the back and the front endurance tests were the worst rated tests.

    Conclusion:  Further good quality research investigating the measurement properties of CS measures in healthy people, is needed. Consensus on terminology and testing methods concerning CS in healthy subjects is required.

  • 387.
    Suhling, Frank
    et al.
    Institut für Geoökologie, Technische Universität Braunschweig, Braunschweig, Germany .
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Gorb, Stanislav
    Spezielle Zoologie, Universität Kiel, Kiel, Germany .
    Kalkman, Vincent
    Nederlands Centrum voor Biodiversiteit Naturalis, Leiden, The Netherlands.
    Dijkstra, Klaas-Douwe
    Nederlands Centrum voor Biodiversiteit Naturalis, Leiden, The Netherlands.
    van Tol, Jan
    Nederlands Centrum voor Biodiversiteit Naturalis, Leiden, The Netherlands.
    Order Odonata2015In: Thorp and Covich's Freshwater Invertebrates: ecology and general biology / [ed] James H. Thorp & D. Christopher Rogers, Amsterdam: Academic Press, 2015, p. 894-932Chapter in book (Other academic)
    Abstract [en]

    This chapter introduces the insect order Odonata. It provides the most recent phylogeny and up-to-date systematics as well as genera and species numbers of the various families in the biogeographic regions. We also present an overview about the general biology, ecology and behavior of Odonata. This includes details on morphology and ultrastructures. We also attempt an updated categorization of odonate life cycle types. The subchapters on ecology and behavior focus on various aspects of habitat selection and microhabitat occupancy, including effects of biotic interactions and antipredation behavior. Finally, we summarize collection and sampling methods for adult and larval Odonata. © 2015 Elsevier Inc. All rights reserved

  • 388.
    Suhling, Frank
    et al.
    Dept. of Environ. System Analysis, Institut für Geoökologie, TU Braunschweig, Langer Kamp 19c, DE-38102 Braunschweig, Germany.
    Sahlén, Göran
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Ecology and Environmental Science.
    Kasperski, Judith
    Dept. of Environ. System Analysis, Institut für Geoökologie, TU Braunschweig, Langer Kamp 19c, DE-38102 Braunschweig, Germany.
    Gaedecke, Dunja
    Dept. of Environ. System Analysis, Institut für Geoökologie, TU Braunschweig, Langer Kamp 19c, DE-38102 Braunschweig, Germany.
    Behavioural and life history traits in temporary and perennial waters: comparisons among three pairs of sibling dragonfly species2005In: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 108, no 3, p. 609-617Article in journal (Refereed)
    Abstract [en]

    Identifying and examining traits that influence the distribution of species is crucial to the understanding of community structure. Theory predicts that traits should differ between species that live in temporary and permanent waters because of differing major environmental variables; viz drying out and predator presence, respectively. Species, however, will also be influenced by their evolutionary history, i.e. by the traits of their common ancestors. We studied differences in life history and behaviour traits in a series of laboratory experiments using pairs of dragonfly species out of three genera of Namibian Libellulidae (Odonata) with one species from each type of habitat. As predicted, growth rates were significantly higher in the temporary water species compared to the permanent water species. Activity and foraging, in contrast, differed between the genera, but did not differ between the habitat types. Hence, our study implies that the behavioural traits are influenced by phylogenetic inertia rather than by the habitat variables, while growth rate is adapted to the habitat. We argue that in all three genera one species has diverged recently from a sister species that lives in the original habitat of the genus, which may be temporary waters in Crocothemis Brauer and in Orthetrum Newman, and permanent waters in Trithemis Brauer. The behavioural traits may therefore be less well adapted. Rapid growth may be the more relevant trait because it is crucial to survival in temporary waters.

  • 389.
    Suhling, Frank
    et al.
    Institut für Geoökologie, Technische Universität Braunschweig, Langer Kamp 19c, D-38106 Braunschweig, Germany.
    Sahlén, Göran
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Ecology and Environmental Science.
    Martens, Andreas
    Biology, Karlsruhe University of Education, Bismarckstrasse 10, D-76133 Karlsruhe, Germany.
    Marais, Eugene
    National Museum of Namibia, Windhoek, P.O. Box 1203, Windhoek, Namibia.
    Schütte, Carsten
    Institut für Geoökologie, Technische Universität Braunschweig, Langer Kamp 19c, D-38106 Braunschweig, Germany.
    Dragonfly Assemblages in Arid Tropical Environments: A Case Study from Western Namibia2006In: Biodiversity and Conservation, ISSN 0960-3115, E-ISSN 1572-9710, Vol. 15, no 1, p. 311-332Article in journal (Refereed)
    Abstract [en]

    Dragonflies have been proposed as indicators for the ecosystem health of freshwater wetlands. For their useful functioning as indicators it is, however, necessary to identify species compositions in specific habitats and species-habitat associations, particularly in the tropics, where such knowledge is still weak. We examined the dragonfly species composition of 133 localities in the arid environment of western Namibia. An analysis of nestedness indicated that distinct, and predictable patterns of species associations can be expected. Discriminant analyses revealed that most of the nine habitat types separated by structural and hydrological parameters are well discriminated by their dragonfly assemblages. Spring brooks in particular host a specific assemblage, which is threatened due to the habitat restriction of several species, as well as by recent habitat loss and degradation. Using a hierarchical method of several criteria we demonstrated the selection of a set of potential indicator species from the species set, most of these being useful indicators for spring brook assemblages. The conservation status of certain habitats and species is discussed. We propose that dragonflies will have a high indicator potential for threatened freshwater wetlands in such areas and may also serve as an indication of the sustainable use of water resources including evaluating measures to rehabilitate environments.

  • 390.
    Suhling, Frank
    et al.
    Technische Universität Braunschweig.
    Suhling, Ida
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Richter, Otto
    Environmental System Analysis, Institute of Geoecology, Braunschweig University of Technology.
    Rising temperatures, altered life cycles and their consequences for dragonflies in Europe2010Conference paper (Other academic)
    Abstract [en]

    Besides range expansion, altered life cycle patterns are the most visible signal of dragonfly responses to recent climate change. Since dragonflies are poikilotherm organisms their metabolism is directly responding to the ambient temperature. Thus, rising temperatures, which have already been recorded and are predicted to be even more severe in the future, should lead to alterations in all aspects of dragonfly life cycles. This may lead to temporal mismatches with other environmental variables relevant for the survival of dragonfly populations. The aim of our contribution is reviewing the known facts about temperature on growth rates and voltinism. We investigated temperature response of growth by laboratory experiments mainly in Libellulidae. Physiological structured mathematical models were used to simulate life cycle duration with various types of seasonal regulation. We will try predictions of consequences of rising temperatures for voltinism and phenology of some European dragonflies in future considering the regionally different climatic conditions. With the aid of such models we will also stress the question how temperature as environmental factor may influence present and future distribution of species in Europe.

  • 391.
    Suhling, Ida
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS). Technische Universität Braunschweig, Braunschweig, Germany.
    Suhling, Frank
    Technische Universität Braunschweig, Braunschweig, Germany.
    Thermal adaptation affects interactions between a range-expanding and a native odonate species2013In: Freshwater Biology, ISSN 0046-5070, E-ISSN 1365-2427, Vol. 58, no 4, p. 705-714Article in journal (Refereed)
    Abstract [en]

    1.Increasing temperature and invading species may interact in their effects on communities. In this study, we investigated how rising temperatures alter larval interactions between a naturally range-expanding dragonfly, Crocothemis erythraea, and a native northern European species, Leucorrhinia dubia. Initial studies revealed that C.erythraea grow up to 3.5 times faster than L.dubia at temperatures above 16 degrees C. As a result, we hypothesised that divergent temperature responses would lead to rapid size differences between coexisting larvae and, consequently, to asymmetric intraguild predation at higher ambient temperatures. 2. Mortality and growth rates were measured in interaction treatments (with both species present) and non-interaction controls (one species present) at four different temperature regimes: at an ambient temperature representative of central Germany, where both species overlap in distribution, and at temperatures increased by 2, 4 and 6 degrees C. 3.The mortality of C.erythraea did not differ between treatment and control. In contrast, mortality of L.dubia remained similar over all temperatures in the controls, but increased with temperature in the presence of the other species and was significantly higher there than in the controls. We concluded that L.dubia suffered asymmetric intraguild predation, particularly at increased temperature. Reduced growth rate of L.dubia in the interaction treatment at higher temperatures also suggested asymmetric competition for prey in the first phase of the experiment. 4.The results imply that the range expansion of C.erythraea may cause reduction in population size of syntopic L.dubia when temperature rises by more than 2 degrees C. The consequences for future range patterns, as well as other factors that may influence the interaction in nature, are discussed. © 2013 Blackwell Publishing Ltd.

  • 392.
    Sundell, Christoffer
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Samband mellan sprintförmåga och 1RM knäböj respektive vertikalhoppsförmåga hosjuniorfotbollsspelare2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: I en fotbollsmatch genomförs 150-250 högintensiva sprinter som varar i 2-4 sekunder. Sprinter kan vara en avgörande del i fotbollsmatcher vilket indikerar att det är viktigt för fotbollsspelare att utveckla sin sprintförmåga. Att träna upp sin maximala styrka har visat sig vara en viktig aspekt för att utveckla sprintförmåga på korta distanser eftersom kontaktiden med marken är längre vid start och accelerationsfasen. Även vertikal hoppförmåga har visat på samband med sprintförmåga. Det finns relativt få studier som har undersökt unilateral hoppförmåga och dess samband med sprintförmåga på viktiga distanser upp till 30 hos fotbollsspelare. Syfte: Syftet med studien var att undersöka om maximal styrka i nedre extremiteter har ett starkare samband med sprintförmåga upp till 30 m än vad unilateral hoppförmåga har Metod: Ett juniorfotbollslag inbjöds att medverka i studien. Maximal styrka i nedre extremiteter mättes med 1RM knäböjstest (kg) och den unilaterala hoppförmågan mättes med ett countermovement jump (UCMJ) (s) utfört på det dominanta benet. Sprintförmågan (s) mättes vid 5 m, 10 m, 15 m och 30 m. Spearman’s korrelationskoefficient (rs) användes för att studera sambandet mellan de olika testerna och ett rs >0,6 ansågs påvisa ett starkt samband. Resultat: Tretton fotbollsspelare deltog vid sprint-testet och vid test av 1RM i knäböj medan tio fotbollsspelare medverkade vid UCMJ. Samtliga fotbollsspelare var mellan 17-19 år gamla. Både 1RM i knäböj och UCMJ hade svaga samband med samtliga sprintdistanser. Korrelationerna mellan1RM i knäböj och sprintdistanser upp till 15 m (rs = -0,49, -0,58, -0,54, -0,21) var högre jämfört med korrelationerna mellan UCMJ och sprintdistanser upp till 15 m (rs = -0,37, -0,34, - 0,22, -0,32). Slutsats: Sambandet mellan sprintförmåga och maximal styrka respektive explosivitet i nedre extremiteter var svagt men något högre för 1RM i knäböj och sprintdistanser upp till 15 m än för UCMJ och samtliga sprintdistanser.

  • 393.
    Sundström, Tomas
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine. Halmstad University, School of Business and Engineering (SET).
    Five weeks of plyometric training improved vertical jump height in female handball players during in-season.2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Handboll, as a team-sport, puts emphasis on many different physical qualities where one is good jumping ability. The aim of this study was to examine if a small amount of additional plyometric training (PT) during in-season, combining drop jumps and box jumps could give significant improvements in vertical jump height in female handball players after five weeks of plyometric training. Jumping performance was evaluated through the squat jump test (SJ), countermovement jump test (CMJ) and a one-leg jump test (OLJ). The Intervention-group improved their jumping performance significant in all three tests. In contrast, the control- group had diminishing results in the SJ and CMJ but without any change in the OLJ. Furthermore, significant correlations were discovered between the SJ, CMJ and OLJ. The improvements seen in this study is relevant for coaches that need to provide gains in jumping performance during in-season when there is not a lot of time for additional training. The OLJ test developed in this study could be a first step to a future handball-test that better resembles the jumping performance in handball than already established two leg tests.

  • 394.
    Sundström, Tomas
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Ronkainen, Fanny
    Halmstad University, School of Business, Engineering and Science.
    Brorsson, Sofia
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Olsson, M. Charlotte
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Five Weeks of Plyometric Training Improve Vertical Jump Height in Female Handball Players During In-Season2010In: Nordic Conference 2010: Abstracts / [ed] Karen Søgaard, Karsten Froberg & Mette Krogh Christensen, Odense: University of Southern Denmark , 2010, p. 112-113Conference paper (Refereed)
    Abstract [en]

    Introduction: Handball is a sport requiring many different physical qualities in order to perform well, one of which is good jumping ability. For handball players available time to enhance power during in-season is often restricted due to an already high training load emphasizing other aspects of the sport than jumping ability. Therefore, one aim of this study was to examine if a small amount of additional plyometric training during in-season, combining drop jumps and box jumps, could give significant improvements in vertical jump height in female handball players after five weeks of training. Generally, vertical jump height is evaluated with two-legged tests, however, the question arises if the tests are relevant in sports that predominantly use several steps and one-leg jumps such as handball. A second aim of this study was thus to develop, evaluate and validate a handball-specific test performed on one leg.

    Methods: Two Swedish female handball-teams playing in the third division were recruited. Players from one team made up the intervention-group (n = 9) and players from the other team functioned as the control-group (n = 4). Plyometric training was added to the regular handball training session twice per week during five weeks, lasting approximately 15 minutes per session, consisting of two sets of eight repetitions of drop jumps and box jumps respectively, while the control-group continued their training as normal. Jumping performance was evaluated through the squat jump test (SJ), countermovement jump test (CMJ) and the handball-specific one leg jump test (OLJ) developed for this study in order to offer a more sport-specific evaluation tool when testing sports that predominantely jump on one leg.

    Results: The intervention-group improved their jumping height significantly with 2,7 cm in the SJ, 3,6cm in the CMJ and 3,6 cm in the OLJ (p < 0,01 for all). The control-group had an opposite trend with diminishing results in all three jumps, -1,5 cm in the SJ (p < 0,05), -1,7 cm in the CMJ (p < 0,05) and -0,9 cm in the OLJ (not significant). The one-legged jump test (OLJ) correlated well with both SJ (r= 0,79, p <0,01 ), and CMJ (r=0,75, p < 0,01).

    Discussion: The present study found significant improvements in jumping height after only five weeks of plyometric training for female handball players. Interestingly, the intervention-group improved to the same extent in both the one and the two-leg jumps test, which might be explained by the accumulation of handball specific training drills performed on one-leg, together with the two-legged plyometric exercises. The same assumption could also explain why the control-group showed no change in the one-leg jump test between the pre and post-tests, but displayed significant lower scores in the two-legged jumping tests after 5 weeks with only regular handball training.

    Conclusion: The improvements seen in this study with a small amount of additional plyometric training is relevant for coaches that need to provide gains in jumping performance during in-season when there is not a lot of time for additional training. Moreover, an evaluation test needs to be as specific as possible to the performance in the sport. The one-leg vertical jump test, developed in this study, could be a first step to a future handball-test that better resembles the jumping performance in handball than already established two-leg jumping tests.

  • 395.
    Sutton, M. A.
    et al.
    Centre for Ecology and Hydrology, Edinburgh.
    Nemitz, E.
    Centre for Ecology and Hydrology, Edinburgh.
    Theobald, M. R.
    Centre for Ecology and Hydrology, Edinburgh.
    Milford, C.
    Centre for Ecology and Hydrology, Edinburgh.
    Dorsey, J. R.
    University of Manchester.
    Gallagher, M. W.
    University of Manchester.
    Hensen, A.
    Energy research Centre of the Netherlands.
    Jongejan, P. A. C.
    Energy research Centre of the Netherlands.
    Erisman, J. W.
    Energy research Centre of the Netherlands.
    Mattsson, Marie
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Schjoerring, J. K.
    University of Copenhagen.
    Cellier, P.
    Institut National de la Recherche Agronomique, France.
    Loubet, B.
    Institut National de la Recherche Agronomique, France.
    Roche, R.
    Institut National de la Recherche Agronomique, France.
    Neftel, A.
    Agroscope Reckenholtz-Tänikon Research Station, Zürich.
    Hermann, B.
    Agroscope Reckenholtz-Tänikon Research Station, Zürich.
    Jones, S. K.
    Agroscope Reckenholtz-Tänikon Research Station, Zürich.
    Lehman, B. E.
    University of Bern.
    Horvath, L.
    Hungarian Meteorological Services, Budapest.
    Weidinger, T.
    Eötvös Loránd University, Budapest.
    Rajkai, K.
    Research Institute of Soil Science and Agrochemistry of Hungary.
    Burkhardt, J.
    University of Bonn.
    Löpmeier, F. J.
    Agrometeorological Research Station of Deutscher Wetterdienst, Braunschweig.
    Daemmgen, U.
    Institut fur Agrarokologie, Bundesforschungsanstalt fur Landwirtschaft, Braunschweig.
    Dynamics of ammonia exchange with cut grassland: Strategy and implementation of the GRAMINAE Integrated Experiment2009In: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 6, no 3, p. 309-331Article in journal (Refereed)
    Abstract [en]

    A major international experiment on ammonia (NH3) biosphere-atmosphere exchange was conducted over intensively managed grassland at Braunschweig, Germany. The experimental strategy was developed to allow an integrated analysis of different features of NH3 exchange including: a) quantification of nearby emissions and advection effects, b) estimation of net NH3 fluxes with the canopy by a range of micrometeorological measurements, c) analysis of the sources and sinks of NH3 within the plant canopy, including soils and bioassay measurements, d) comparison of the effects of grassland management options on NH3 fluxes and e) assessment of the interactions of NH3 fluxes with aerosol exchange processes. Additional technical objectives included the inter-comparison of different estimates of sensible and latent heat fluxes, as well as continuous-gradient and Relaxed Eddy Accumulation (REA) systems for NH3 fluxes. The prior analysis established the spatial and temporal design of the experiment, allowing significant synergy between these objectives. The measurements were made at 7 measurement locations, thereby quantifying horizontal and vertical profiles, and covered three phases: a) tall grass canopy prior to cutting (7 days), b) short grass after cutting (7 days) and c) re-growing sward following fertilization with ammonium nitrate (10 days). The sequential management treatments allowed comparison of sources-sinks, advection and aerosol interactions under a wide range of NH3 fluxes. This paper describes the experimental strategy and reports the grassland management history, soils, environmental conditions and air chemistry during the experiment, finally summarizing how the results are coordinated in the accompanying series of papers.

  • 396.
    Svedberg, David
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Olsson, Robin
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Virtuella värmebanker i fjärrvärmesystem: En analys av värmelagring i flerbostadshus2012Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Analysis of the heat storage in residential apartment buildings can be utilized to achieve a smoothing effect of the heat load in district heating system. This heat storage leads to a more optimal operation of the district heating system and will lead to reduced oil consumption for peak load purposes. The district heating system has since its beginning been demand-driven. This means that the customer determines how high the heat demand should be. This leads to large variations in heat production. The variations result in peak demands in the district heating system. These peaks are expensive for the utility company which will be forced to start their peak load plants, which usually consists of oil-fired boiler plants. In this bachelor thesis we have developed a system structure and a model for how the load control can be applied in the district heating system operated by Trollhättan Energi in Western Sweden. The model developed shows how the district heating system and the indoor temperature is affected by the new load control proposed.

  • 397.
    Svensson, Erik
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Hur starkt korrelerar unilateral hoppförmåga vertikalt respektive horisontellt med sprintförmåga upp till 30 meter hos manliga fotbollsspelare?2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund och syfte

    Under en fotbollsmatch rör sig spelarna någonstans mellan 9-12 km i olika hastigheter. Ungefär 10 % av denna sträcka genomförs genom löpningar av hög intensitet, där de flesta sprinter sker kring 2 sekunder. Under 2 sekunder hinner en spelare ungefär 10-15 meter, beroende på spelarens accelerationsförmåga. Studier har visat ett samband mellan hopp och sprintförmåga både bilateralt och unilateralt. Dock är det få studier som följt förloppet från start till 30 meter med mellantider om varje 5 meter och få studier genomförda unilateralt hos fotbollsspelare. Syftet med studien var att undersöka sambandet mellan unilateral horisontell respektive vertikal hoppförmåga med sprintförmåga hos manliga fotbollsspelare.

    Metod

    22 manliga fotbollsspelare från division 4 elit deltog i studien. Testprotokollet bestod av unilaterala vertikalhopp (CMJ och SJ), unilateralt stående längdhopp samt sprinttest på 30 meter med mellantider på 5, 10, 15, 20 och 25m. Samtliga hopptester genomfördes med händerna vid höfterna och sprinttesterna genomfördes med stående start 60cm före första sensorn. Pearsons korrelationskoefficient (r) undersöktes mellan hopp och sprintförmåga med gränsvärdena r ≤ 0.35 för svaga, r = 0.36-0.67 för moderata och r = 0.68-1.0 för starka korrelationer, där korrelationer r ≥ 0.9 ansågs vara mycket starka.

    Resultat

    Överlag ökade sambanden mellan alla hopptester desto längre sprintsträckor som genomfördes. SJ visade starkast korrelationer vid nästan alla sprintsträckor. Starkaste sambandet mellan stående längdhopp och sprintförmåga fanns mellan hopp på vänster ben och mellantiden på 25 meter (r=-0,64). Starkaste sambandet mellan CMJ och sprintförmåga fanns mellan hopp på vänster ben och sprintsträckan 30 meter (r=-0,69). Starkast korrelation av alla hopptester upptäcktes mellan SJ och 30 meter sprint (r = -0,73).

    Slutsats

    Korrelationen mellan unilateral hoppförmåga horisontellt respektive vertikalt och sprintförmåga blir starkare ju längre sträckan blir, med sprinttester utförda upp till 30 meter. Den starkaste korrelationen ses mellan SJ och sprintsträckan 30 meter.

  • 398.
    Svensson, Jonas
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Fleischer, Siegfried
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Rosenqvist, Torsten
    Halmstad University.
    Stibe, Lars
    Länsstyrelsen Halland.
    Pansar, Joakim
    Halmstad University.
    Ekologisk dagvattenhantering i Halmstad2002Book (Other academic)
    Abstract [en]

    The report compiles experiences with open stormwater treatment facilities at the City of Halmstad. In specific wetlands, research efforts are demonstrated that investigate retention effects of metals, nutrients and other substances.

  • 399.
    Svensson, Jonas M.
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Strand, John A.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Sahlén, Göran
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Weisner, Stefan E.B.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Environmental Science, Wetland Research Centre.
    Rikare mångfald och mindre kväve: Utvärdering av våtmarker skapade med stöd av lokala investeringsprogram och landsbygdsutvecklingsstöd2004Book (Other academic)
    Abstract [sv]

    På uppdrag av Naturvårdsverket och Jordbruksverket har Våtmarkscentrum, Högskolan i Halmstad, utvärderat svenska våtmarker anlagda med landsbygdsutvecklingsstöd, LBU-stöd (Miva, projektstöd och Lmiva utan projektstöd) respektive våtmarker anlagda inom lokala investeringsprogram (LIP) avseende näringsretention och biologisk mångfald. Resultaten från utvärderingen redovisas separat för de fyra olika grupperna/kategorierna av anlagda våtmarker enligt nedan (fetstil anger kategorihänvisning i text, tabeller och figurer):

    • Våtmarker anlagda med anläggningsstöd inom Lokala investeringsprogram 1998 - 2002, LIP.

    • Våtmarker anlagda med anläggningsstöd inom LBU-projektstöd (dessa våtmarker får vanligen även skötselstöd, Lmiva), 2000 - 2002.

    • Våtmarker anlagda 1996-1999, utan anläggningsstöd men med skötselstöd (Miljöstöd), Miva.

    • Våtmarker anlagda från år 2000 - , utan anläggningsstöd men med skötselstöd (LBU-våtmarker som endast får skötselersättning), Lmiva.

    Syftet har främst varit att utvärdera och jämföra hur våtmarksanläggning inom olika stödformer har bidragit till minskad övergödning och ökad biologisk mångfald. Syftet har alltså inte varit att utvärdera enskilda våtmarker utan att ge en helhetsbild för olika stödformer och regioner. Därför har det varit nödvändigt att basera utvärderingen på data för ett stort antal våtmarker. Detta innebär att utförliga mätningar ej kunnat genomföras inom de enskilda objekten. Närsaltsretention har därför beräknats baserat på modeller och biologisk mångfald har undersökts genom att trollsländor använts som indikatorgrupp.

    Inom uppdraget har, med jordbruksstöd, registrerats information om totalt 908 våtmarksobjekt om totalt 2860 ha ersatt yta fördelat på 1815 ha Miva, 920 ha projektstöd och 125 ha Lmiva utan projektstöd. Totalt registrerade våtmarker med stöd från LIP är 274 st, omfattande 439 ha.

    Kompletterande fältstudier har utförts i drygt 100 st våtmarker. Främst är det resultaten från dessa våtmarker som sammanfattas nedan...

  • 400.
    Svensson, Robin
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Biomechanics and Biomedicine.
    Sköld, Pontus
    Rekommendationer för Styrketräning; En litteraturstudie2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Några ändamål med styrketräning kan vara muskelhypertrofi, ökad muskelstyrka,

    sportspecifik förbättring eller rehabilitering. Vid träning för hypertrofi kan den metaboliska

    stressen vara en viktig faktor och på samma vis är intensiteten en av de viktigaste variablerna

    då individen tränar för ökad muskelstyrka. Volym och intensitet är centrala

    styrketräningsvariabler i ett träningsprogram och det är viktigt att träningsprogrammet

    varieras. C-uppsatsen är utformad som en litteraturstudie och är baserad på vetenskapliga

    artiklar och tryckt litteratur. Dessa artiklar är hämtade från databasen Pubmed och tidsskriften

    Journal of Strength and Conditioning Research. Materialet sammanställdes och jämfördes mot

    varandra. Vid träning för muskelhypertrofi rekommenderas att en nybörjare tränar med ett

    repetitionsantal på 8 - 12 repetitioner med 1 - 3 set. En intensitet på 60 - 85 % av 1RM

    rekommenderas och en träningsfrekvens på 2 - 3 dagar i veckan. Då nybörjare tränar för att

    öka i muskelstyrka rekommenderas 1 - 3 set per övning och ett repetitionsantal på 8 - 12.

    Intensiteten bör ligga på 60 - 70 % av ett 1RM med en träningsfrekvens på 2-3 dagar i veckan.

    Vid träning för muskelhypertrofi rekommenderas 1 - 12 repetitioner för vältränade individer,

    detta i samband med periodisering. Antal set rekommenderas variera mellan 1 - 6 set och

    intensiteten bör ligga på 67 - 100 % utav 1RM. Träningsfrekvensen rekommenderas ligga

    mellan 2 - 4 dagar i veckan. Vid träning för muskelstyrka rekommenderas 3 - 12 repetitioner

    med 4 set eller mer per övning. Intensiteten bör ligga på 70 - 85% av 1RM med en

    träningsfrekvens på 2 - 4 dagar i veckan. Litteraturstudiens resultat visar att det finns många

    olika rekommendationer. Det finns alltså inget träningsprogram som passar alla. Med detta

    sagt menar vi att varje individs träningsprogram bör vara anpassat efter individens mål och

    förutsättningar. För att se vad som passar individen bör denna testa sig fram för att hitta sitt

    optimala träningsupplägg.

5678910 351 - 400 of 472
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf