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  • 1.
    Aagerup, Ulf
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Centrum för innovations-, entreprenörskaps- och lärandeforskning (CIEL).
    Frank, Anna-Sofia
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Hultqvist, Evelina
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    The persuasive effects of emotional green packaging claims2019Ingår i: British Food Journal, ISSN 0007-070X, E-ISSN 1758-4108, Vol. 121, nr 12, s. 3233-3246Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Purpose - The purpose of this paper is to investigate the effects of rational green packaging claims vs emotional green packaging claims on consumers' purchase propensity for organic coffee.

    Design/methodology/approach - Three within-subjects experiment were carried out (N=87, N=245, N=60). The experimental design encompasses packaging with rational green claims, emotional green claims, as well as a neutral (control) claim. Measured variables are introduced to assess participants' environmental commitment and information processing ability. A manipulated between-subjects variable is introduced to test how distraction interacts with preference for the claims.

    Findings - Overall, consumers prefer products with green claims over those with neutral (control) claims, and products with emotional green claims to those with rational green claims. The studies also reveal that this effect is moderated by participants' environmental commitment, information processing ability and by distraction. The findings were statistically significant (p<0.05).

    Research limitations/implications - As a lab experiment, the study provides limited generalizability and external validity. Practical implications - For most organic FMCG products, it is advisable to employ emotional packaging claims.

    Social implications - The presented findings provide marketers with tools to influence consumer behavior toward sustainable choices.

    Originality/value - The paper validates previous contributions on the effects of product claim types, and extends them by introducing comprehensive empirical data on all the Elaboration Likelihood Model's criteria for rational decision-making; motivation, opportunity and ability.

  • 2.
    Albinsson, John
    et al.
    Lund University, Lund, Sweden.
    Brorsson, Sofia
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Lindgren, Finn
    Lund University, Lund, Sweden.
    Rydén Ahlgren, Åsa
    Lund University, Lund, Sweden.
    Cinthio, Magnus
    Lund University, Lund, Sweden.
    Combined use of Iteration, Quadratic Interpolation and an Extra Kernel for high-resolution 2D particle tracking: a first evaluation2010Ingår i: 2010 ieee international ultrasonics symposium, New York: IEEE Press, 2010, s. 2000-2003Konferensbidrag (Refereegranskat)
    Abstract [en]

    A novel 2D particle tracking method, that uses 1) iteration, 2) fast quadratic sub-pixel estimation (with only 28 multiplications per movement), and 3) a previous kernel, has been evaluated and compared with a full-search block-matching method. The comparison with high-frequency ultrasound data (40 MHz) was conducted in silico and on phantoms, which comprised lateral, diagonal, and ellipsoidal movement patterns with speeds of 0–15 mm/s. The mean tracking error was reduced by 68% in silico and 71% for the phantom measurements. When only sub-pixel estimation was used, the decrease in the tracking error was 61% in silico and 57% for the phantom measurements. As well as decreasing the tracking error, the new method only used 70% of the computational time needed by the full-search block-matching method. With a fast method having good tracking ability for high-frequency ultrasound data, we now have a tool to better investigate tissue movements and its dynamic functionality.

  • 3.
    Albinsson, John
    et al.
    Lund Univ, Dept Biomed Engn, S-22100 Lund, Sweden..
    Brorsson, Sofia
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Rydén Ahlgren, Åsa
    Lund Univ, Dept Clin Sci, Clin Physiol & Nucl Med Unit, Malmo, Sweden..
    Cinthio, Magnus
    Lund Univ, Dept Biomed Engn, S-22100 Lund, Sweden..
    Improved tracking performance of lagrangian block-matching methodologies using block expansion in the time domain: In silico, phantom and invivo evaluations2014Ingår i: Ultrasound in Medicine and Biology, ISSN 0301-5629, E-ISSN 1879-291X, Vol. 40, nr 10, s. 2508-2520Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this study was to evaluate tracking performance when an extra reference block is added to a basic block-matching method, where the two reference blocks originate from two consecutive ultrasound frames. The use of an extra reference block was evaluated for two putative benefits: (i) an increase in tracking performance while maintaining the size of the reference blocks, evaluated using in silico and phantom cine loops; (ii) a reduction in the size of the reference blocks while maintaining the tracking performance, evaluated using in vivo cine loops of the common carotid artery where the longitudinal movement of the wall was estimated. The results indicated that tracking accuracy improved (mean - 48%, p<0.005 [in silico]; mean - 43%, p<0.01 [phantom]), and there was a reduction in size of the reference blocks while maintaining tracking performance (mean - 19%, p<0.01 [in vivo]). This novel method will facilitate further exploration of the longitudinal movement of the arterial wall. (C) 2014 World Federation for Ultrasound in Medicine & Biology.

  • 4.
    Alonso-Fernandez, Fernando
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Bigun, Josef
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Englund, Cristofer
    RISE Viktoria, Gothenburg, Sweden.
    Expression Recognition Using the Periocular Region: A Feasibility Study2018Ingår i: 2018 14th International Conference on Signal-Image Technology & Internet-Based Systems (SITIS) / [ed] Gabriella Sanniti di Baja, Luigi Gallo, Kokou Yetongnon, Albert Dipanda, Modesto Castrillón-Santana & Richard Chbeir, Los Alamitos: IEEE, 2018, s. 536-541Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper investigates the feasibility of using the periocular region for expression recognition. Most works have tried to solve this by analyzing the whole face. Periocular is the facial region in the immediate vicinity of the eye. It has the advantage of being available over a wide range of distances and under partial face occlusion, thus making it suitable for unconstrained or uncooperative scenarios. We evaluate five different image descriptors on a dataset of 1,574 images from 118 subjects. The experimental results show an average/overall accuracy of 67.0%/78.0% by fusion of several descriptors. While this accuracy is still behind that attained with full-face methods, it is noteworthy to mention that our initial approach employs only one frame to predict the expression, in contraposition to state of the art, exploiting several order more data comprising spatial-temporal data which is often not available.

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  • 5.
    Alonso-Fernandez, Fernando
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Farrugia, Reuben
    University of Malta, Msida, Malta.
    Bigun, Josef
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Very Low-Resolution Iris Recognition Via Eigen-Patch Super-Resolution and Matcher Fusion2016Ingår i: 2016 IEEE 8th International Conference on Biometrics Theory, Applications and Systems (BTAS), Piscataway: IEEE, 2016, artikel-id 7791208Konferensbidrag (Refereegranskat)
    Abstract [en]

    Current research in iris recognition is moving towards enabling more relaxed acquisition conditions. This has effects on the quality of acquired images, with low resolution being a predominant issue. Here, we evaluate a super-resolution algorithm used to reconstruct iris images based on Eigen-transformation of local image patches. Each patch is reconstructed separately, allowing better quality of enhanced images by preserving local information. Contrast enhancement is used to improve the reconstruction quality, while matcher fusion has been adopted to improve iris recognition performance. We validate the system using a database of 1,872 near-infrared iris images. The presented approach is superior to bilinear or bicubic interpolation, especially at lower resolutions, and the fusion of the two systems pushes the EER to below 5% for down-sampling factors up to a image size of only 13×13.

  • 6.
    Andersson, Evelina
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS).
    The 2-dimensional biomechanical modeling of the loads on the spine (L5-L1) during a “Back Walkover” maneuver in gymnastics2014Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Injuries in the female gymnast are common and it is important to understand the biomechanical factors responsible for injury. The Back Walkover maneuver requires one of the greatest amounts of lumbar hyperextension compared to other common gymnastic maneuvers. During the Back Walkover large lateral and vertical impact forces follows on the spine. The spine and muscles around the spine have to absorb generally large forces; therefore the loads on the back and certainly on the lower back are of significant interest. Additionally, it takes a lot of strength and a vast range of motion to perform gymnastic maneuvers such as The Back Walkover. It is of interest to study mechanical loads on a female gymnast since they show higher occurrences of stress-related pathologies of the lumbar spine.

    Therefore the purpose of this project was to examine the loads on the spine during the gymnastic maneuver Back Walkover. Tests on a single female gymnast were made at the sports engineering lab at the University of Adelaide in Australia. Using the 3D-camera system; Optitrack Motion Capture System and Kistler Force Plate, positional data for two dimensions, X-direction (anterior-posterior) and Z-direction (vertical), and ground force were received. Data received were progressed into a graph, diagrams and biomechanical calculations where forces for the vertebrae L1 were calculated in vertical and horizontal direction. The received forces were compared to vertical and horizontal forces in L1 during standing position. Together with developed videos this assisted to model the loads of the spine (L1) during the gymnastic maneuver the “Back Walkover”. The study has led to a deeper knowledge for the community about the risks for female gymnasts and has widened the experience of the project participant, as the project aimed. 

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  • 7.
    Andersson, Matilda
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Analysis of Changes in Running Technique Between a Shod and Barefoot Running Condition.2016Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Background: Lately, barefoot running has become popular and there is a debate on the pros and cons of barefoot running with regards to running injuries. Many factors are causing injuries and one of the factors discussed is the fact that we run in shoes. When we run in shoes the biomechanics of the running technique may and therefore be a possible cause to injury. Aim: The aim of the study was to assess how the foot strike pattern, angle of the knee and ankle joint at time of initial contact, as well as the step length changes between a shod and barefoot running condition in habitually shod runners when running in a pace equivalent to their running pace over ten kilometers. Method: Twenty-seven healthy runners (18 male, 9 female) were included in the study. The study took place at the fitness center of Halmstad University. Subjects ran on a treadmill, in an individual pace equivalent to their running pace over ten km, both in a shod and barefoot running condition. Two-dimensional analysis of the sagittal plane kinematics of the knee joint, ankle joint and foot position to horizontal, foot strike pattern and step length was done. Participants ran for ten minutes with shoes and for five minutes barefoot. Running technique was videotaped using an Iphone 6 camera and landmarks were marked with white tape to ease the analysis. Results: Changes in foot strike pattern was observed. When running barefoot 63% of the subjects adopted a non-heel strike pattern compared to 18.5% when shod (p=0.001). Knee flexion was increased at IC for the barefoot condition, with 164°±6 relative knee angle compared to 167°±6 when shod (p=0.001). Ankle angle at IC did not show a statistical significant difference between conditions (p=0.657). When barefoot the angle was 117°±8 compared to 115°±8 when shod. Foot angle to horizontal showed a flatter foot placement at IC with a less dorsiflexed foot for the barefoot condition (-4°±8) compared to shod (-12°±8), (p=0.001). Step length was decreased for the barefoot condition (0.82m ±0.15)   compared to shod (0.85m ±0.13), (p=0.008). Conclusion: Results are consistent with previous findings that barefoot running in some cases change the running technique with a flatter foot placement, an increased knee flexion at IC and a decreased step length. However, caution must be taken when habitually shod runners transition to barefoot running in regards to the biomechanical changes that may occur. To benefit from barefoot running a non-heel strike pattern is required. Further, the running technique may be the more important factor, regardless of wearing shoes or not.

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  • 8.
    Ashfaq, Awais
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab). KTH Royal Institute of Technology, Stockholm, Sweden.
    Adler, Jonas
    KTH Royal Institute of Technology, Stockholm, Sweden & Elekta Instrument AB, Stockholm, Sweden.
    A modified fuzzy C means algorithm for shading correction in craniofacial CBCT images2017Ingår i: CMBEBIH 2017: Proceedings of the International Conference on Medical and Biological Engineering 2017 / [ed] Almir Badnjevic, Singapore: Springer, 2017, Vol. 62, s. 531-538Konferensbidrag (Refereegranskat)
    Abstract [en]

    CBCT images suffer from acute shading artifacts primarily due to scatter. Numerous image-domain correction algorithms have been proposed in the literature that use patient-specific planning CT images to estimate shading contributions in CBCT images. However, in the context of radiosurgery applications such as gamma knife, planning images are often acquired through MRI which impedes the use of polynomial fitting approaches for shading correction. We present a new shading correction approach that is independent of planning CT images. Our algorithm is based on the assumption that true CBCT images follow a uniform volumetric intensity distribution per material, and scatter perturbs this uniform texture by contributing cupping and shading artifacts in the image domain. The framework is a combination of fuzzy C-means coupled with a neighborhood regularization term and Otsu’s method. Experimental results on artificially simulated craniofacial CBCT images are provided to demonstrate the effectiveness of our algorithm. Spatial non-uniformity is reduced from 16% to 7% in soft tissue and from 44% to 8% in bone regions. With shading-correction, thresholding based segmentation accuracy for bone pixels is improved from 85% to 91% when compared to thresholding without shading-correction. The proposed algorithm is thus practical and qualifies as a plug and play extension into any CBCT reconstruction software for shading correction. © Springer Nature Singapore Pte Ltd. 2017.

  • 9.
    Ashfaq, Awais
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab). Halland Hospital, Region Halland, Halmstad, Sweden.
    Nowaczyk, Sławomir
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Machine learning in healthcare - a system’s perspective2019Ingår i: Proceedings of the ACM SIGKDD Workshop on Epidemiology meets Data Mining and Knowledge Discovery (epiDAMIK) / [ed] B. Aditya Prakash, Anil Vullikanti, Shweta Bansal, Adam Sadelik, Arlington, 2019, s. 14-17Konferensbidrag (Refereegranskat)
    Abstract [en]

    A consequence of the fragmented and siloed healthcare landscape is that patient care (and data) is split along multitude of different facilities and computer systems and enabling interoperability between these systems is hard. The lack interoperability not only hinders continuity of care and burdens providers, but also hinders effective application of Machine Learning (ML) algorithms. Thus, most current ML algorithms, designed to understand patient care and facilitate clinical decision-support, are trained on limited datasets. This approach is analogous to the Newtonian paradigm of Reductionism in which a system is broken down into elementary components and a description of the whole is formed by understanding those components individually. A key limitation of the reductionist approach is that it ignores the component-component interactions and dynamics within the system which are often of prime significance in understanding the overall behaviour of complex adaptive systems (CAS). Healthcare is a CAS.

    Though the application of ML on health data have shown incremental improvements for clinical decision support, ML has a much a broader potential to restructure care delivery as a whole and maximize care value. However, this ML potential remains largely untapped: primarily due to functional limitations of Electronic Health Records (EHR) and the inability to see the healthcare system as a whole. This viewpoint (i) articulates the healthcare as a complex system which has a biological and an organizational perspective, (ii) motivates with examples, the need of a system's approach when addressing healthcare challenges via ML and, (iii) emphasizes to unleash EHR functionality - while duly respecting all ethical and legal concerns - to reap full benefits of ML.

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    Epidamik proceedings
  • 10.
    Blomgren, Bo
    et al.
    Safety Assessment, Bgn. 681 Gärtuna, AstraZeneca R and D Södertälje, Sodertalje SE 151 85, Sweden; Institution of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
    Johannesson, Ulrika
    Division of Obstetrics and Gynaecology, Karolinska Institutet Danderyds Hospital, Stockholm, Sweden.
    Bohm-Starke, Nina
    Division of Obstetrics and Gynaecology, Karolinska Institutet Danderyds Hospital, Stockholm, Sweden.
    Falconer, Christian
    Division of Obstetrics and Gynaecology, Karolinska Institutet Danderyds Hospital, Stockholm, Sweden.
    Hilliges, Marita
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    A computerised, unbiased method for epithelial measurement2004Ingår i: Micron, ISSN 0968-4328, E-ISSN 1878-4291, Vol. 35, nr 5, s. 319-329Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective

    To develop and evaluate a standardised method for unbiased measurements of epithelial thickness taking the variability of the dermal papillae in consideration.

    Methods

    A computer-assisted measurement program suitable for haematoxylin and eosin routine stained specimens has been developed.

    Results

    The developed program was designed to measure four different distance parameters, taking the number, height and width of dermal papillae into account. The measurement program gave very accurate results compared with manual measurements. The measurement results can be presented as tables or star graphs, and the results can be further processed by multivariate analysis.

    Conclusion

    The computer-assisted measurement program is considered to be a valuable and reliable tool for measurements of epithelial thickness, irrespectively of the variability of the epithelial morphology. Since length, size and number of the papillae may change with certain pathological conditions, age and also under hormonal influence, this method can be a helpful diagnostic tool.

  • 11.
    Bordag, Michael
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Nikolaev, Vladimir
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    The vacuum energy for two cylinders with one increasing in size2009Ingår i: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, E-ISSN 1751-8121, Vol. 42, nr 41, s. 415203-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We consider the vacuum energy for the configuration of two cylinders and obtain its asymptotic expansion if the radius of one of these cylinders becomes large while the radius of the other one and their separation are kept fixed. We calculate explicitly the next-to-leading order correction to the vacuum energy for the radius of the other cylinder becoming large or small.

  • 12.
    Brorsson, Sofia
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Extensor muscle force measurements and muscle architecture in Rheumatoid Arthritis patients2009Konferensbidrag (Refereegranskat)
    Abstract [en]

    Although rheumatoid arthritis (RA) patients frequently experience muscle weakness, limited information exists on disease specific muscle changes. The common hand deformity in RA includes disturbed finger extension with subsequent flexion deformities. The aims of this study were to measure finger extension force and finger flexion force in patients with rheumatoid arthritis and compare them with healthy subjects.  We also wanted to explore the possible causes of impaired finger extension force with the help of ultrasound muscle analyses.

    The study group comprised of 40 women: 20 patients with RA (median disease duration 20 years) and 20 healthy age-matched controls. The finger extension force measurements were performed with a newly developed device (EX-it), finger flexion force was measured with the Grippit. The extensor digitorum communis muscle was examined with ultrasound.

    Significant differences were found between the two groups, concerning extension and flexion force (p<0.001). Ultrasound measurements indicated significant differences in structural parameters (Cross Section Area (p< 0.05), muscle thickness (p < 0.05) and fascicle length (p < 0.05)). Overall changes in muscle architecture during contraction were more pronounced in the control group than in the RA group (p < 0.01).

    The results indicate differences in structural parameters as well as functional tests, i.e. contraction time and extension muscle force capacity, between normal and RA muscles. Whether these differences depend on a disease-specific effect on the muscles in RA, or are secondary to inactivity or hand deformities, remains to be elucidated.

  • 13.
    Bäckman, Sandra
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Produktutvecklingsprojekt: En applikation till användandet av oxygenbehandling i hemmet.2013Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Enligt statistiken år 2010 fanns det 26 individer sett från en grupp på 100.000 som var tilldelade oxygenbehandling i hemmet. Oxygenbehandlingen tillför en bestämd mängd oxygen till bäraren då möjligheten att själv förse sig med rätt mängd för överlevnad hämmats. Den dominerande sjukdomen till oxygenbehandling i hemmet är KOL, kroniskt obstruktiv lungsjukdom. Som namnet antyder är det en kronisk sjukdom som ger inflammatoriska förändringar i lungans bronkioler. Dessa förändringar minskar andningsytan vilket resulterar i att individens andningskapacitet reduceras.

    Projektet använde metoder från dynamisk produktutveckling med användaren i fokus. Detta för att få fram en funktionell prototyp som kunde användas utav avsedd målgrupp och uppfylla det syfte, mål och krav som ställdes på projektets resultat. En viktig komponent som projektet därför arbetade med var insamling av data. För detta användes olika metoder som kunde tillskaffa sig information från både användare och förskrivare av oxygenbehandling.  Samtliga av de metoder som användes var beprövade sedan tidigare och projektet kunde därför med fördel genomföra intervjuer, observationer, matrisuppställningar, riskanalyser samt användartester på patienter med oxygenbehandling.

    Prototypen som togs fram i projektet resulterade i att avsedd målgrupp kunde utföra testmoment på den utan att det förekom risker med användandet. Resultatet uppfyllde därför syftet och målet med projektet som riktade sig mot att patienter skulle få möjlighet till att förflytta den syrgasslang som används vid oxygenbehandling. Vidare kunde slutsatsen dras att resultatet uppfyllde patienternas önskemål om att ta fram en möjlighet till förflyttning av syrgasslangen i hemmet samtidigt som det besvarade de frågeställningar som projektet strävade efter att besvara. Det fanns inga befintliga lösningar på det problem som beskrevs i projektet och det gav möjlighet att framställa en första prototyp som uppfyllde syftet och målet.  

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    Examensarbete i Biomekanik
  • 14.
    Bååth, Lars
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Maskinteknisk produktframtagning (MTEK).
    To See What You Cannot See2003Ingår i: Image Analysis: 13th Scandinavian Conference, SCIA 2003, Halmstad, Sweden, June 29 - July 2, 2003, Proceeding / [ed] Josef Bigun, Tomas Gustavsson, Heidelberg: Springer, 2003, s. 108-108Kapitel i bok, del av antologi (Övrig (populärvetenskap, debatt, mm))
    Abstract [en]

    This paper discusses imaging with complex data from micro-wave, mm-wave, and optical interferometers. An overview of methods to extract physical parameters as images from interferometer data is made and two- and three-dimensional images of gas flows, quasi-stellar objects, steel melts, and fiber material such as wood are presented.

  • 15.
    Carlsson, Magnus
    et al.
    Dalarna University, Falun, Sweden.
    Nilsson, Johnny
    Dalarna University, Falun, Sweden & The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
    Hellström, John
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap. The Swedish Golf Federation, Stockholm, Sweden.
    Tinmark, Fredrik
    The Swedish School of Sport and Health Sciences, Stockholm, Sweden.
    Carlsson, Tomas
    Dalarna University, Falun, Sweden.
    The effect of ball temperature on ball speed and carry distance in golf drives2018Ingår i: Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, ISSN 1754-3371, Vol. 233, nr 2, s. 186-192Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The purpose of this study was to investigate the effect of ball temperature on impact ball speed and carry distance during golf drives in a blind randomized test design. The balls were exposed to a temperature-controlled environment (4 °C, 18 °C, 32 °C, and 46 °C) for 24 h prior to the test and each temperature group consisted of 30 balls. The 120 drives were performed by an elite male golfer (handicap: 0.0) in an indoor driving range. All drives were measured by a Doppler-radar system to determine the club-head speed, launch angle, spin rate, ball speed, and carry distance. Differences between the groups were investigated using a one-way analysis of variance. The results indicated that ball-speed and carry-distance differences occurred within the four groups (p < 0.001 and p < 0.01, respectively). The post hoc analyses showed that the ball temperatures of 18 °C and 32 °C had greater ball speeds and carry distances than balls at 4 °C and 46 °C (all < 0.05). The intervals for the between-group differences were 0.6–0.7 m s 1 and 2.9–3.9 m for ball speed and carry distance, respectively. Hence, the results showed that ball temperature influences both the ball speed and the carry distance. Based on the findings in this study, standardization of ball temperature should be factored into governing body regulation tests for golf equipment. © IMechE 2018.

  • 16.
    Carlsson, Markus
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Utvärdering av protesfötter med hjälp av en konstruktion som kan utföra en mekanisk gång.2012Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This paper has evaluated a new type of prosthetic foot, X-Balance, which aim was to facilitate the performance on uneven ground for the user. This study have performed gait analyzes with three prosthetic feet, the X-Balance, Flex-Foot and assure Ottobock9192 on flat and uneven surfaces using 3D analysis system QTM (Qualisys Track Manager) and associated force plates. During the project a prototype of a design that can perform a mechanical gait were manufactured. The prototype has then been used to fulfill the purpose and objective of this study which is to make different final sets that demonstrate differences between prosthetic feet. Gait analyses of individuals have also been performed to get an idea of what normal gait is. The reliability of the prototype was measured and compared to the study with individuals. By comparison, it could be established that the structure had a higher reliability than the individuals, thus making it easier to compare prosthetic feet against each other. There are no measurements to show that proves that the mechanical gait with the prototype has a high validity. The evaluation findings shows that Ottobock9192 reduce the forces in the Z- and Y-direction most and thus contributes to a gentler heel strike than the other two prosthetics. The results also shows that X-Balance allows greater flexibility in sideway direction (supination) and contributing to a more gentle and easier gait for the user once operate the prosthetic foot over an object with the medial part of the forefoot.

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  • 17.
    Carlvik, Fredrik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Orve, Jacob
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Unify Xtend: Utveckling av vakuumassisterat suspensionsystem för att reducera skav och glapp vid användning av benprotes2017Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Lindhe Xtend is a prosthetics company in Halmstad with the ambition of providing the amputee with functional mobility and a high quality of life. Their main product, the Xtend Foot is a patented prosthetic foot developed to imitate the natural features of the human foot.

     

    Dissatisfaction with prostheses often stems from poor fitting of the part that connects to the body. This often leads to chafing, pistoning and strain. Amongst users of leg prostheses, the strain often results in a reduction of limb volume, further augmenting the bad fit. The development of suspension systems has excelled through the recent years as many prosthetics companies has developed products with integrated vacuum assisted suspension systems, a mounting method where vacuum is used to hold the prosthesis against the body. This mounting mechanism of the limb onto the prosthesis has been proven to prevent fluctuations of limb volume as well as reducing chafing and pistoning.

     

    A vacuum assisted suspension system integrated with the Xtend Foot has been invented using the product development process. The project group has used motion analysis, calculations and concept generation to reach a final concept to be prototyped, called Unify Xtend. Unify Xtend is made to demonstrate the function of the final concept, to actively produce a vacuum during ambulation using a pneumatic actuator.

    This project has addressed prosthetics and pneumatics. The project group has, using their knowledge of mechanical engineering and physiology, combined and applied them in this thesis.

    Further user testing is needed to evaluate the usability of the prototype, due to reaching target pressure considerably faster than the products of main market competitors.

  • 18.
    Djärv Karltorp, Felicia
    et al.
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    Brackmann, Alexandra
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    Skadeförebyggande kläder för individer med skelettsjukdomar: Integrerade knäskydd för barn med skelettsjukdomar, olika medicinska diagnoser, men även barn som behöver extra stöd i vardagen.2023Självständigt arbete på grundnivå (yrkesexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The skeleton has several fundamental functions in the body, providing protection and structure and safeguarding organs, enabling movement and bearing of weight. The significance of having a complete and strong skeleton is essential for individuals, but it is far from certain for those with a skeletal disorder. Skeletal disorders can manifest in various ways, with the common condition of a more fragile skeleton that is prone to fractures under low force and load. Currently, there are over 450,000 individuals estimated to have the most common skeletal disorder, Osteoporosis, in Sweden alone. In 2019, it was estimated that a total of 124,000 fractures related solely to skeletal disorders occurred in Sweden, equivalent to 338 fractures per day. A registry extract from the Swedish Cause of Death Register in 2019 revealed that deaths related to osteoporotic fractures were the third leading cause of death in Sweden, following dementia and cardiovascular disease. Skeletal disorders not only result in a reduced quality of life for individuals but also impose a state cost of nearly 18 billion SEK per year. This cost exceeds the combined expenses of diabetes care and care for patients with multiple sclerosis today. Despite this, skeletal disorders, according to the Swedish Agency for Health Technology Assessment and Assessment of Social Services, remain an undertreated segment, with the majority of cases neither diagnosed, treated, nor provided with other preventive measures for fractures.

    For Sofie Hellström and her son Gabriel, their perspective on life changed in the summer of 2020 with a diagnosis of Osteogenesis Imperfecta, a skeletal disorder. At Karolinska Institutet, they were offered a piece of mattress as hip protection. Sofie then discovered a global lack of functional clothing for individuals in need of extra protection in their daily lives. This became the starting point for the company OICAN and the vision of providing all children with the best conditions to explore the world.

    The aim of the project has been to create integrated knee protectors that can prevent injuries and fractures to the knee and femur. The goal has been to develop a pair of pants with integrated protection that does not compromise on protective capability, freedom of movement, or aesthetic design. The project has resulted in prototypes of integrated knee protectors for both adults and children, along with corresponding injection molding tools. In the final stages of the project, the prototypes have been integrated into pants and tested with excellent results.

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  • 19. Eberhardt, Ludvig
    et al.
    Annervi, Tilda
    CytoSafe: För en säkrare bröstbiopsi2023Självständigt arbete på grundnivå (yrkesexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
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  • 20.
    Ekelund, Gustaf
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Andersson, Sebastian
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Jack The Gripper: Fixationsplatta för typ 3-frakturer på scapula2017Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Reverse Total Shoulder Arthroplasty (rTSA) is an increasingly common approach to treating different shoulder injuries. The rTSA results in increased force from m. deltoideus which originates from acromion. However, postoperative fractures on the scapula have occurred in some cases. These fractures are divided into 3 different types depending on where the fracture occurs. There is no recommended treatment for type 3 fractures. This project is a product development project with the purpose to find a solution to the fixation problem of type 3 fractures.To reach the project goal, the group has used well-known and proven product development methods, calculations, FEM analyzes and a model assembly analysis. The concept development was performed by interviewing orthopedics who have a lot of experience with rTSA and osteosynthesis related to these fractures. A prototype, which shows the features of the fixation plate, was made using 3D printers.The result of this project has provided a fixation plate that meets the groups requirements and has features that a modern fixation plate has today. In addition, two types of extra plates mounted on the fixation plate to the thin structure of spina scapula, was developed to counteract the axial force. The fixation plate shows excellent results on the FEM analyzes and assembly analysis performed on a scapula model. The prototype has also been given good testimonials from the orthopedics who participated in the project.

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  • 21.
    Eriksson, Amanda
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Blücher, Daniel
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Intelligenta beslutstöd och psykisk ohälsa: En kvalitativ studie om etiska utmaningar med Artificiell Intelligens som beslutstöd inom sjukvården för psykisk ohälsa2022Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Sjukvården visar intresse för användning av Artificiell Intelligens (AI) och inom behandling för psykisk ohälsa finns behov för stöd. Intelligenta beslutsstöd kan bidra till minskad belastning för vårdpersonal och bättre behandling för patienter, men sjukvårdens känsliga natur och de konsekvenser som kan uppstå vid försummelse medför etiska utmaningar. Behandling av psykisk ohälsa är komplext och behöver utforskas för att identifiera de potentiella etiska utmaningar som kan uppstå. Genom en kvalitativ intervjustudie med åtta deltagare har området utforskats både bland AI-forskare och vårdpersonal, där insikter från båda kontexter har analyserats för att identifiera och utforska återkommande etiska utmaningar. Genom insamlad empiri och litteraturstudie har fem etiska utmaningar identifierats och utforskats: hantera felaktiga rekommendationer, hantera moraliska dilemman, uppnå patientautonomi, ansvarsdilemmat, och skapa förtroende. 

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  • 22.
    Frandsen, Björn
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS).
    Olsson, M Charlotte
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Hip and Trunk Muscle Electromyography Differences Between Bilateral and Unilateral Bodyweight Resistance Exercises2015Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Introduction

    In sports, force production and movement are predominantly generated in a unilateral weight-bearing stance. Therefore, unilateral resistance training may possibly elicit more sport-specific strength gains compared to traditional bilateral strength training. Hip- and trunk- muscles stabilize the pelvis and trunk to maintain proper technique and posture in resistance training and are thought to play a central role in sports performance as well as injury prevention. Hip- and trunk- muscle activity increases as the body weight balance change from a bilateral to a unilateral stance. Little research has examined the magnitude of change in muscle activation differences between bilateral and unilateral stance in lower body exercises.

    Aim

    The aim of this study was to examine the electromyographic (EMG) activity in hip and trunk muscles in three bodyweight exercises performed in a bilateral and a unilateral stance.

    Methods

    14 healthy, young adults participated in a single session, single-group, observational study. Manual muscle testing was used to attain a maximal voluntary isometric contraction (MVC) value for gluteus medius, gluteus maximus, rectus abdominis, and erector spinae. EMG measurements (4 channel ME6000, MegaWin Software, Kuopio, Finland) were taken during performance of squat, bridge, and plank exercises in both a bilateral and a unilateral stance.

    Results

    In all three exercises, EMG activity (presented as magnitude of change) was greater in the unilateral stance compared to the bilateral stance (p< 0.05), for the muscles gluteus medius (squat 478%, bridge 204%, plank 285%) and gluteus maximus (squat 371%, bridge 172%, plank 233%). In addition, in plank, EMG activity was greater in unilateral stance compared to the bilateral stance (p< 0.05) in rectus abdominis (120%) and erector spinae (127%). In the squat and bridge, no differences were identified in EMG activity for rectus abdominis and erector spinae between the bilateral and the unilateral stance.

    Discussion

    Nearly all unilateral exercises activated the hip muscles (gluteus medius, gluteus maximus) more than double compared to the same exercises performed bilaterally. In particular, gluteal muscle activity during the unilateral squat was more than 3.5 fold greater as compared to the bilateral stance. This greater magnitude of change in the unilateral squat might be explained by the single contact point with the ground in the squat, whereas the bridge and plank exercises include more ground contact points even in their unilateral stance. A unilateral training program including squat exercises might be beneficial for developing hip strength which is of great importance in sports performance.

  • 23.
    Fransson, Anna
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Stare, Andrea
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    D4Active: Helhetssystem för diabetesvård2020Självständigt arbete på grundnivå (yrkesexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Konceptidén D4Active, ett helhetssystem för diabetesvård, grundades som ett examensarbete höstterminen 2018 av två utvecklingsingenjörsstudenter. Konceptets stora potential ledde till att Andrea Stare och Anna Fransson övertog utvecklingen. Under projektets senaste utvecklingsår har projektet gått från ett koncept till ett fungerande trådlöst prototypsystem som kan demonstrera de viktigaste funktionerna för diabetesbehandling. D4Active tillhandahåller en paketlösning bestående av endast tre nödvändiga delar för diabetesvård; en central kommunikationsenhet i form av en interaktiv applikation, en delningsbar insulinpump och en sensor som kan mäta aktuella insulinnivåer. Applikationen följer samtliga medicintekniska standarder för medicinsk utrustning och kan demonstrera de mest grundläggande funktionerna för diabetesvård. Projektgruppen har utvecklat en insulinpump med förlängd livscykel genom en delning som behåller de komponenter som slängs i onödan. Systemet riktar sig till personer som drabbats av diabetes typ 1, en kronisk sjukdom som betyder att kroppen inte kan tillverka naturligt insulin som stabiliserar kroppens glukosnivåer. För höga eller låga insulinvärden kan ha förödande konsekvenser för den drabbade. Systemet är det första trådlösa helhetsystemet för diabetesbehandling som tillgodoser användarnas önskemål och behov av förenklad hantering av sjukdomen. Genom grundliga marknadsundersökningar och intervjuer har projektgruppen tagit fram lösningar för hur systemet kan förbättra hanteringen av diabetes med användaren i fokus. Projektet har utvecklats för att minska antalet enheter för diabetiker att bära med sig, vilket ökar rörligheten och möjligheten till ett mer aktivt vardagsliv. Systemet förväntas stärka diabetesvården och främja hälsa och aktiv livsstil för diabetiker. På så vis kan D4Active pressa de världsledande företagen och bevisa att det går att skapa bättre och mer hållbara produkter för både användaren och miljön.

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  • 24.
    Färm, Gabriel
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Abdullah, Mohammad Omar
    Högskolan i Halmstad, Akademin för informationsteknologi.
    SafeWalk: A tool for the visually impaired2022Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis aims to implement a system called SafeWalk to help visually impaired people to sense obstacles in their path and provide them with more independence and more effortless life routines without any external help. SafeWalk is a low power consuming system designed to replace the daily used white cane. It consists of sensors, a buzzer, a vibrating motor, and a software application. The system will be installed on the user's shoe. It detects the objects in front of the user using an Ultrasonic sensor that measures the distance to the targeted object by transmitting sound waves. This will produce vibration in the shoe and causes the buzzer to start playing when the object gets closer. Similarly, using the provided application, signals will be received in the user's smartphone, which will begin to vibrate when the object is detected. The system works just as planned. The final prototype senses objects in the walking path very well. The connection to the app was strong and never disconnected while in use. The phone vibrates stronger if an object on the ground gets closer; if there is an object in the air, the buzzer and vibrator signal the user. 

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  • 25.
    Galozy, Alexander
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Nowaczyk, Sławomir
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Pinheiro Sant'Anna, Anita
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Ohlsson, Mattias
    Lund University, Lund, Sweden.
    Lingman, Markus
    Halland Hospital, Region Halland, Sweden & Institute of Medicine, Department of Molecular and Clinical Medicine/Cardiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Pitfalls of medication adherence approximation through EHR and pharmacy records: Definitions, data and computation2020Ingår i: International Journal of Medical Informatics, ISSN 1386-5056, E-ISSN 1872-8243, Vol. 136, artikel-id 104092Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background and purpose: Patients’ adherence to medication is a complex, multidimensional phenomenon. Dispensation data and electronic health records are used to approximate medication-taking through refill adherence. In-depth discussions on the adverse effects of data quality and computational differences are rare. The purpose of this article is to evaluate the impact of common pitfalls when computing medication adherence using electronic health records.

    Procedures: We point out common pitfalls associated with the data and operationalization of adherence measures. We provide operational definitions of refill adherence and conduct experiments to determine the effect of the pitfalls on adherence estimations. We performed statistical significance testing on the impact of common pitfalls using a baseline scenario as reference.

    Findings: Slight changes in definition can significantly skew refill adherence estimates. Pickup patterns cause significant disagreement between measures and the commonly used proportion of days covered. Common data related issues had a small but statistically significant (p < 0.05) impact on population-level and significant effect on individual cases.

    Conclusion: Data-related issues encountered in real-world administrative databases, which affect various operational definitions of refill adherence differently, can significantly skew refill adherence values, leading to false conclusions about adherence, particularly when estimating adherence for individuals. © 2020 The Authors. Published by Elsevier B.V. 

  • 26.
    Gama, Fábio
    et al.
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet. University of Santa Catarina, Florianópolis, Brazil.
    Magistretti, Stefano
    Polytechnic University of Milan, Milan, Italy.
    Lost in Red Tape? Conforming Medical Device Developments to Adaptive Regulations2023Konferensbidrag (Refereegranskat)
    Abstract [en]

    Innovations that employ novel technologies can be problematic, particularly when sources of uncertainty can lead to severe financial, social, and reputational losses. Nowhere is this more evident than in innovations across Medical Device (MD) developments. In healthcare, described by stricter safety requirements, adapting the MD process to ongoing regulatory principles intended to balance benefits and risks is often elusive. We investigate a single case study comprising four medical device technology developments implemented in products and services. Does this study explore how a healthcare firm changes its medical device development process to adaptive regulations? Our study offers three contributions. First, we contribute to the innovation literature by proposing a flexible MD process in which safety standards are continuously revised, and development stages are regulated differently. For example, when the legal and regulatory aspects of emerging technologies are unpredictable, unknown firms are encouraged to de-risk the early-stage potential problem in adopting the emerging technology. Second, we contribute to the literature on Technology Development by showing how introducing digital technologies innovation requires a significant change in the culture and mindset of the organization. In the healthcare industry, where rules and procedures are hindering risky and uncertain investment, nurturing the culture of people towards risk-taking and learning from failure is a crucial dimension of digital transformation. Third, we propose a combined process that leverages traditional MD phases. The change management theory suggests a way to enact a digital transformation in a hyper-regulated environment.

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  • 27.
    Gelzinis, Adas
    et al.
    Kaunas University of Technology, Lithuania.
    Verikas, Antanas
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Intelligenta system (IS-lab).
    Bacauskiene, Marija
    Kaunas University of Technology, Lithuania.
    Vaiciukynas, Evaldas
    Kaunas University of Technology, Lithuania.
    Kelertas, Edgaras
    Kaunas University of Technology, Lithuania.
    Uloza, Virgilijus
    Kaunas University of Medicine, Lithuania.
    Vegiene, Aurelija
    Kaunas University of Medicine, Lithuania.
    Towards video laryngostroboscopy-based automated screening for laryngeal disorders2009Ingår i: Proceedings of the 6th International Conference “Models and Analysis of Vocal Emissions for Biomedical Applications”, MAVEBA 2009 / [ed] C. Manfredi, Florence, Italy: Firenze University Press , 2009, s. 125-128Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper is concerned with kernel-based techniques for automatedcategorization of laryngeal colour image sequences obtained by videolaryngostroboscopy. Features used to characterize a laryngeal imageare given by the kernel principal components computed using the$N$-vector of the 3-D colour histogram. The least squares supportvector machine (LS-SVM) is designed for categorizing an imagesequence (video) into the healthy, cancerous and noncancerous classes. The kernel function employed by theLS-SVM is defined over a pair of matrices, rather than over a pairof vectors. The classification accuracy of over 85% was obtainedwhen testing the developed tools on data recorded during routinelaryngeal videostroboscopy.

  • 28.
    Gharehbaghi, Arash
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Partovi, Elaheh
    Amirkabir University of Technology, Tehran, Iran.
    Babic, Ankica
    Linköping University, Linköping, Sweden; University of Bergen, Bergen, Norway.
    Parralel Recurrent Convolutional Neural Network for Abnormal Heart Sound Classification2023Ingår i: Caring is sharing - exploiting the value in data for health and innovation: [33rd Medical Informatics Europe Conference, MIE2023, held in Gothenburg, Sweden, from 22 to 25 May, Amsterdam: IOS Press, 2023, Vol. 302, s. 526-530Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents the results of a study performed on Parallel Convolutional Neural Network (PCNN) toward detecting heart abnormalities from the heart sound signals. The PCNN preserves dynamic contents of the signal in a parallel combination of the recurrent neural network and a Convolutional Neural Network (CNN). The performance of the PCNN is evaluated and compared to the one obtained from a Serial form of the Convolutional Neural Network (SCNN) as well as two other baseline studies: a Long- and Short-Term Memory (LSTM) neural network and a Conventional CNN (CCNN). We employed a well-known public dataset of heart sound signals: the Physionet heart sound. The accuracy of the PCNN, was estimated to be 87.2% which outperforms the rest of the three methods: the SCNN, the LSTM, and the CCNN by 12%, 7%, and 0.5%, respectively. The resulting method can be easily implemented in an Internet of Things platform to be employed as a decision support system for the screening heart abnormalities.

  • 29.
    Hellman, Emma
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Sahlström, Fredrik
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    HUTTR - Räddningsfilt för hypoterma patienter2011Självständigt arbete på grundnivå (kandidatexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Av de tusentals olyckor som sker varje vinter kan kylan bidra till förödande komplikationer. Vär- meförlust från kroppen kan leda till att personer drabbas av hypotermi. Hypotermi inträffar när en persons kroppstemperatur understiger 35 °C och kroppens värmeproduktion slås ut. De låga kropps- temperaturerna gör det svårare att klara av överlevande aktiviteter så som att andas och att stoppa blödningar. För att förhindra fortsatt nedkylning krävs det att personen skyddas mot värmeförlusten och att extern värme tillförs.

    För några år sedan ändrades riktlinjerna för hur extern värme får tillföras i fält och det blev då tillåtet för räddningspersonal att tillföra värme redan vid olycksplatsen. Dock reagerade inte marknaden på detta direktiv och räddningstjänsten är idag tvungna att använda bristfälliga produkter. Svenska Sjöräddningssällskapet, SSRS, har uttryckt ett stort behov av nya, kompletta lösningar som ger rätt vård till patienten.

    Resterande innehåll i sammanfattningen är sekretesskyddad enligt kapitel 2 då det röjer nyheter som förhindrar patentsökande.

  • 30.
    Heyman, Ellen Tolestam
    et al.
    Department of Emergency Medicine, Halland Hospital, Region Halland, Varberg, Sweden; Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, Lund, Sweden.
    Ashfaq, Awais
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab). Halland Hospital, Region Halland, Halmstad, Sweden.
    Khoshnood, Ardavan
    Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, Lund, Sweden; Skåne University Hospital Lund, Lund, Sweden.
    Ohlsson, Mattias
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab). Department of Astronomy and Theoretical Physics, Division of Computational Biology and Biological Physics, Lund University, Lund, Sweden.
    Ekelund, Ulf
    Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, Lund, Sweden; Skåne University Hospital Lund, Lund, Sweden.
    Holmqvist, Lina Dahlén
    Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Sahlgrenska University Hospitals, Gothenburg, Sweden; .
    Lingman, Markus
    Halland Hospital, Region Halland, Halmstad Sweden; Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Improving Machine Learning 30-Day Mortality Prediction by Discounting Surprising Deaths2021Ingår i: Journal of Emergency Medicine, ISSN 0736-4679, E-ISSN 1090-1280, Vol. 61, nr 6, s. 763-773Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: Machine learning (ML) is an emerging tool for predicting need of end-of-life discussion and palliative care, by using mortality as a proxy. But deaths, unforeseen by emergency physicians at time of the emergency department (ED) visit, might have a weaker association with the ED visit.

    Objectives: To develop an ML algorithm that predicts unsurprising deaths within 30 days after ED discharge.

    Methods: In this retrospective registry study, we included all ED attendances within the Swedish region of Halland in 2015 and 2016. All registered deaths within 30 days after ED discharge were classified as either “surprising” or “unsurprising” by an adjudicating committee with three senior specialists in emergency medicine. ML algorithms were developed for the death subclasses by using Logistic Regression(LR), Random Forest (RF), and Support Vector Machine (SVM).

    Results: Of all 30-day deaths (n = 148), 76% (n = 113) were not surprising to the adjudicating committee. The most common diseases were advanced stage cancer, multidisease/frailty, and dementia. By using LR, RF, and SVM, mean area under the receiver operating characteristic curve (ROC-AUC) of unsurprising deaths in the test set were 0.950 (SD 0.008), 0.944 (SD 0.007), and 0.949 (SD 0.007), respectively. For all mortality, the ROC-AUCs for LR, RF, and SVM were 0.924 (SD 0.012), 0.922 (SD 0.009), and 0.931 (SD 0.008). The difference in prediction performance between all and unsurprising death was statistically significant (P < .001) for all three models.

    Conclusion: In patients discharged to home from the ED, three-quarters of all 30-day deaths did not surprise an adjudicating committee with emergency medicine specialists. When only unsurprising deaths were included, ML mortality prediction improved significantly. © 2021 The Author(s). Published by Elsevier Inc.

  • 31.
    Johansson, Carolina
    et al.
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    Linus, Bergman
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    Blood Simpling II: Making blood sampling simple2022Självständigt arbete på grundnivå (yrkesexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Vid blodprovstagning förekommer det att problem och komplikationer uppstår. Det händer att blodprovstagningen helt misslyckas. Statistiskt sett misslyckas blodprovstagningen på första försöket för vuxna i 28 procent av fallen och för barn är motsvarande siffra 44 procent.

    Projektet utgick från det behov av hjälpmedel att utföra blodprovstagning som uppdragsgivarna Frida Svensson och Lisa Eliasson identifierade under sitt examensarbete från 2021. Syftet var att fortsatta deras arbete att utveckla en medicinteknisk produkt som underlättar vid blodprovstagning och föra den närmare marknaden.

    I syfte att föra produkten närmare marknaden var det projektgruppens mål att vidareutveckla produkten. Projektgruppen skulle färdigställa komponenterna var för sig och sedan sätta samman dem till en produkt. Produktens effekt är att den ökar chansen att lyckas med blodprovtagningen redan på första försöket. Det gör att det inte bara blir behagligare för patienten utan det sparar även på värdefull tid och engångsmaterial, vilket i längden leder till stora finansiella besparingar för vården.

    Resultatet av projektet blev en prototyp som gestaltar produkten Blood Simpling II vars funktioner gör att risken att komplikationer uppstår vid venös blodprovstagning minskar och samtidigt ökar produkten chansen att blodprovstagningen lyckas på första försöket. Genom det resultat som projektgruppen lyckades med uppfyllde de sitt syfte att föra produkten ett steg närmare marknaden. Text borttagen på grund av sekretess. Texten nämner produktens funktionalitet vars nyhetsvärde skyddas för att bevara patenteringsmöjligheten.

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  • 32.
    Johnsson, Alex
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Johansson, Erik
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Förtroende för digitala vårdtjänster: En kvalitativ studie om hur patienters förtroende för digitala vårdtjänster skapas och stärks2023Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    I takt med digitalisering och IKTs (informations- och kommunikationsteknik) framväxt skapas nya vårdlösningar för både patienter och vårdgivare. Under Covid-19 pandemin har behovet för alternativa vårdlösningar lett till en ökad användning av digitala vårdtjänster som MinDoktor, Kry och 1177s vårdapp. Dessa digitala vårdtjänster har erbjudit patienter vård på distans då fysiska vårdcentraler inte varit ett lättillgängligt alternativ. Syftet med studien är att undersöka vad som krävs för att patienter ska uppleva digitala vårdtjänster som förtroendeskapande och -stärkande. En studie med elva medverkande respondenter som använt sig av digitala vårdtjänster genomfördes. Empiri från intervjuerna analyserades och utvärderades för att möjliggöra en representation av de medverkande respondenternas åsikter. Studien bidrar med insikter till hur förtroende för digitala vårdtjänster kan skapas och stärkas för patienter genom tillgång till personlig kontakt, videomöten och företagsrykten.

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  • 33.
    Jönsson, Anna
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    Brettéus, Emily
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Biomekanik och biomedicin.
    dentÆd: Utveckling av medicintekniskt instrument som ökar säkerheten samt underlättar vid oral protetik.2014Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Initiativet till projektet togs av tandvårdspersonal på Specialisttandvården i Halmstad då de upplevde problem vid arbete med oral protetik. Problemet, som projektet även bygger på, innebär att komponenter tappas och på grund av gravitationen samt patientens position riskeras att inhaleras eller sväljas. Detta innebär ett stress- och orosmoment, vilket bidrar till en försämrad psykosocial arbetsmiljö för tandvårdspersonalen.

     

    2008 infördes det statliga tandvårdsstödet i Sverige vilket innebär en reducerad kostnad för protetikingrepp som lett till att fler har råd med oral protetik. Därför blir problemet mer och mer utbrett, vilket gjort kravet på en lösning mer eftertraktad.

     

    I projektet har dynamisk produktutveckling tillämpats med stort fokus på involvering av framtida användare. Artikelsökning, observation och enkätundersökning i genomförd produktdefinitionsfas lade grunden till projektet. Olika konceptgenererings- och utvärderingsmetoder tillämpades och födde den slutgiltiga prototypen. Under hela projektets gång har en kontinuerlig dialog och testning hos uppdragsgivarna utförts.

     

    Detta produktutvecklingsprojekt resulterade i ett instrument som underlättar för tandvårdspersonal samt ökar säkerheten för patienten vid oral protetik. Lösningen är en specialutformad pincett som träs på skruvmejseln och fixerar komponenter.

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    Examensarbete, dentÆd
  • 34.
    Kauppila, Moa
    et al.
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    Blom, Emil
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    ReRESP: Rehabiliteringsredskap för nedsatt lungkapacitet2022Självständigt arbete på grundnivå (yrkesexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Ladda ner fulltext (pdf)
    fulltext
  • 35.
    Khandelwal, Siddhartha
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Gait Event Detection in the Real World2018Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Healthy gait requires a balance between various neuro-physiological systems and is considered an important indicator of a subject's physical and cognitive health status. As such, health-related applications would immensely benefit by performing long-term or continuous monitoring of subjects' gait in their natural environment and everyday lives. In contrast to stationary sensors such as motion capture systems and force plates, inertial sensors provide a good alternative for such gait analysis applications as they are miniature, cheap, mobile and can be easily integrated into wearable systems.

    This thesis focuses on improving overall gait analysis using inertial sensors by providing a methodology for detecting gait events in real-world settings. Although the experimental protocols for such analysis have been restricted to only highly-controlled lab-like indoor settings; this thesis presents a new gait database that consists of data from gait activities carried out in both, indoor and outdoor environments. The thesis shows how domain knowledge about gait could be formulated and utilized to develop methods that are robust and can tackle real-world challenges. It also shows how the proposed approach can be generalized to estimate gait events from multiple body locations. Another aspect of this thesis is to demonstrate that the traditionally used temporal error metrics are not enough for presenting the overall performance of gait event detection methods. The thesis introduces how non-parametric tests can be used to complement them and provide a better overview.

    The results of comparing the proposed methodology to state-of-the-art methods showed that the approach of incorporating domain knowledge into the time-frequency analysis of the signal was robust across different real-world scenarios and outperformed other methods, especially for the scenario involving variable gait speeds in outdoor settings. The methodology was also benchmarked on publicly available gait databases yielding good performance for estimating events from different body locations. To conclude, this thesis presents a road map for the development of gait analysis systems in real-world settings.

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    ThesisSid
  • 36.
    Khandelwal, Siddhartha
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Wickström, Nicholas
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Identification of Gait Events using Expert Knowledge and Continuous Wavelet Transform Analysis2014Ingår i: BIOSIGNALS 2014: Proceedings of the International Conference on Bio-inspired Systems and Signal Processing / [ed] Harald Loose, Guy Plantier, Tanja Schultz, Ana Fred & Hugo Gamboa, [S.l.]: SciTePress, 2014, s. 197-204Konferensbidrag (Refereegranskat)
    Abstract [en]

    Many gait analysis applications involve long-term or continuous monitoring which require gait measurements to be taken outdoors. Wearable inertial sensors like accelerometers have become popular for such applications as they are miniature, low-powered and inexpensive but with the drawback that they are prone to noise and require robust algorithms for precise identification of gait events. However, most gait event detection algorithms have been developed by simulating physical world environments inside controlled laboratories. In this paper, we propose a novel algorithm that robustly and efficiently identifies gait events from accelerometer signals collected during both, indoor and outdoor walking of healthy subjects. The proposed method makes adept use of prior knowledge of walking gait characteristics, referred to as expert knowledge, in conjunction with continuous wavelet transform analysis to detect gait events of heel strike and toe off. It was observed that in comparison to indoor, the outdoor walking acceleration signals were of poorer quality and highly corrupted with noise. The proposed algorithm presents an automated way to effectively analyze such noisy signals in order to identify gait events.

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    Khandelwal_biosignals_2014
  • 37. Lavesson, Tilde
    Schysst Diabetes: Ett smart webbverktyg för diabetstekniska hjälpmedel.2016Självständigt arbete på grundnivå (kandidatexamen), 180 hpStudentuppsats (Examensarbete)
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  • 38.
    Lindhe, Christoffer
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Klintäng, Anders
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    xBalance: The safer and more comfortable prosthetic foot2012Självständigt arbete på grundnivå (kandidatexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
  • 39. Lippig-Singewald, Max
    et al.
    Sandberg, Fredrik
    Cytocircle: Morgondagens Bröstbiopsiprodukt2020Självständigt arbete på grundnivå (kandidatexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
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  • 40.
    Lossev, Alexander
    et al.
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    Johansson, Christopher
    Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet.
    MeddiGuard: Säkerhet och trygghet har fått ett nytt namn2021Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Följande rapport är en beskrivning av processen, resultatet och reflektionen kring det projektsom genomfördes i samverkan med Medarca AB HT-2020 till VT-2021.

    Projektet har varit inriktat på äldrevården, specifikt det särskilda boendet. Ochmedicinhanteringen är en viktig del av vårdarbetet i denna sektor. Säkerheten när det kommertill medicinhantering är A och O och ett enda fel i medicineringen kan få livshotandekonsekvenser. Branschen har över 90 000 bäddar bara i Sverige och över 4 miljoner i övriga Europa vilket innebär att det är många som är i stort behov av en trygg och säker äldrevård.

    Problemen som äldrevården står inför är bland annat läkemedelssvinn i form av stöld,felmedicinering, röriga medicinskåp som gör det svårt att hitta rätt medicin, onödigt springför att en brukares medicin inte kan vara samlad på en och samma plats och omodernaprocesser som behöver digitaliseras.

    Projektgruppen fick i uppdrag att undersöka Medarcas produkt Meddibox för att se omförbättringar kunde göras. Efter förarbetet så presenterades ett antal olika förbättringsförslagför Meddibox och bland dessa fanns en idé som ledde till att en helt ny konceptproduktistället togs fram. Resultatet blev MeddiGuard, ett digitalt läkemedelsskåp som minimerarriskerna för samtliga ovannämnda problem och effektiviserar vårdens processer.MeddiGuard fungerar sömlöst med Medarcas övriga produkter. Detta leder till en säkrare ochtryggare vård för alla inblandade och ekonomiska besparingar för vården och för samhället.

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  • 41.
    Malmberg, Donald
    et al.
    MEFOS, Luleå, Sweden.
    Nilsson, Emil
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Tillämpad matematik och fysik (MPE-lab).
    Using microwave technology to create a topographical image of the burden surface in a blast furnace2005Ingår i: Proceedings of 5th Ironmaking Conference, Buenos Aires: IAS , 2005, s. 213-220Konferensbidrag (Refereegranskat)
  • 42.
    Mashad Nemati, Hassan
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Gholami Shahbandi, Saeed
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Åstrand, Björn
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Human Tracking in Occlusion based on Reappearance Event Estimation2016Ingår i: ICINCO 2016: 13th International Conference on Informatics in Control, Automation and Robotics: Proceedings, Volume 2 / [ed] Oleg Gusikhin, Dimitri Peaucelle & Kurosh Madani, SciTePress, 2016, Vol. 2, s. 505-512Konferensbidrag (Refereegranskat)
    Abstract [en]

    Relying on the commonsense knowledge that the trajectory of any physical entity in the spatio-temporal domain is continuous, we propose a heuristic data association technique. The technique is used in conjunction with an Extended Kalman Filter (EKF) for human tracking under occlusion. Our method is capable of tracking moving objects, maintain their state hypothesis even in the period of occlusion, and associate the target reappeared from occlusion with the existing hypothesis. The technique relies on the estimation of the reappearance event both in time and location, accompanied with an alert signal that would enable more intelligent behavior (e.g. in path planning). We implemented the proposed method, and evaluated its performance with real-world data. The result validates the expected capabilities, even in case of tracking multiple humans simultaneously.

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  • 43.
    Minelga, Jonas
    et al.
    Department of Electric Power Systems, Kaunas University of Technology, Kaunas, Lithuania.
    Verikas, Antanas
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Vaiciukynas, Evaldas
    Department of Electric Power Systems, Kaunas University of Technology, Kaunas, Lithuania.
    Gelzinis, Adas
    Department of Electric Power Systems, Kaunas University of Technology, Kaunas, Lithuania.
    Bacauskiene, Marija
    Department of Electric Power Systems, Kaunas University of Technology, Kaunas, Lithuania.
    A Transparent Decision Support Tool in Screening for Laryngeal Disorders Using Voice and Query Data2017Ingår i: Applied Sciences: APPS, E-ISSN 1454-5101, Vol. 7, nr 10, s. 1-15, artikel-id 1096Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this study is a transparent tool for analysis of voice (sustained phonation /a/) and query data capable of providing support in screening for laryngeal disorders. In this work, screening is concerned with identification of potentially pathological cases by classifying subject’s data into ’healthy’ and ’pathological’ classes as well as visual exploration of data and automatic decisions. A set of association rules and a decision tree, techniques lending themselves for exploration, were generated for pathology detection. Data pairwise similarities, estimated in a novel way, were mapped onto a 2D metric space for visual inspection and analysis. Accurate identification of pathological cases was observed on unseen subjects using the most discriminative query parameter and six audio parameters routinely used by otolaryngologists in a clinical practice: equal error rate (EER) of 11.1% was achieved using association rules and 10.2% using the decision tree. The EER was further reduced to 9.5% by combining results from these two classifiers. The developed solution can be a useful tool for Otolaryngology departments in diagnostics, education and exploratory tasks. © 2017 by the authors.

  • 44.
    Monaghan, Thomas
    et al.
    Ministry of Defence Abbey Wood, Bristol, United Kingdom.
    Harding, Matthew J.
    School of Chemical and Bioprocess Engineering, University College Dublin, Dublin, Ireland.
    Christie, Steven D. R.
    Department of Chemistry, Loughborough University, Loughborough, United Kingdom.
    Friel, R. J.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), Centrum för forskning om inbyggda system (CERES).
    In-situ time resolved spectrographic measurement using an additively manufactured metallic micro-fluidic analysis platform2019Ingår i: PLOS ONE, E-ISSN 1932-6203, Vol. 14, nr 11, artikel-id e0224492Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Introduction

    Microfluidic reactionware allows small volumes of reagents to be utilized for highly controlled flow chemistry applications. By integrating these microreactors with onboard analytical systems, the devices change from passive ones to active ones, increasing their functionality and usefulness. A pressing application for these active microreactors is the monitoring of reaction progress and intermediaries with respect to time, shedding light on important information about these real-time synthetic processes.

    Objective

    In this multi-disciplinary study the objective was to utilise advanced digital fabrication to research metallic, active microreactors with integrated fibre optics for reaction progress monitoring of solvent based liquids, incompatible with previously researched polymer devices, in combination with on-board Ultraviolet-visible spectroscopy for real-time reaction monitoring.

    Method

    A solid-state, metal-based additive manufactured system (Ultrasonic Additive Manufacturing) combined with focussed ion beam milling, that permitted the accurate embedment of delicate sensory elements directly at the point of need within aluminium layers, was researched as a method to create active, metallic, flow reactors with on-board sensing. This outcome was then used to characterise and correctly identify concentrations of UV-active water-soluble B-vitamin nicotinamide and fluorescein. A dilution series was formed from 0.01–1.75 mM; which was pumped through the research device and monitored using UV-vis spectroscopy.

    Results

    The results uniquely showed the in-situ ion milling of ultrasonically embedded optical fibres resulted in a metallic microfluidic reaction and monitoring device capable of measuring solvent solutions from 18 μM to 18 mM of nicotinamide and fluorescein, in real time. This level of accuracy highlights that the researched device and methods are capable of real-time spectrographic analysis of a range of chemical reactions outside of those possible with polymer devices.

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  • 45.
    Mårtensson, Fredrik
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi. Halmstad högskola.
    Westberg, Erik
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Prioritization of Informative Regions in PET Scans for Classification of Alzheimer's Disease2021Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Alzheimer’s Disease (AD) is a widespread neurodegenerative disease. The disease causes brain atrophy, resulting in memory loss, decreased cognitive ability, and eventually death. There is currently no cure for the disease, but treatment may delay the onset. Therefore, it is crucial to detect the disease at an early stage. Medical imaging techniques, such as Positron Emission Tomography (PET), are heavily applied for this task. In recent years, machine learning approaches have shown success in identifying AD from such images.

    The thesis presents a pipeline approach to detect, extract and evaluate Region of Interest (ROI) for prioritization of informative regions in PET scans for classification of Alzheimer’s disease. The pipeline applies data acquired from Alzheimer’s Disease Neuroimaging Initiative (ADNI). An analysis of Weakly-Supervised Object Localization (WSOL) is discussed for detection of informative regions particularly indicative of AD. WSOL analyse the original full-volume 18F-fluorodeoxyglucose (18F-FDG)-PET scan to categorize the informative regions on subjects into Cognitively Normal (CN), Mild Cognitive Impairment (MCI), or AD. The detection of informative regions are processed to two approaches to extract ROI on the full-volume 18F-FDG-PET scan: Bounding-Box (BBox) Generatio nand Automated Anatomical Labeling (AAL) Generation. BBoxes Generation restricts the 18F-FDG-PET scans for Convolutional Neural Network (CNN) to BBox proposal swith particularly informative regions. The second approach ranks the anatomical regions of the brain through brain parcellation with the pre-defined atlas AAL3, and restricts a CNN to the highest-ranked regions.

    The results evaluate if ROIs increase the robustness for classification in relationto full-volume 18F-FDG-PET scan.

    The results suggest that full-volume 18F-FDG-PET with heavily restricted image size does not decrease classification performance. Instead, the BBox Generation results in a significant classification performance improvement on the test set from an Area under the ROC Curve (AuC) score of 70.08% to 97.73% and accuracy from 51.79% to 88.03%. AAL Generation suggests that the middle and inferior regions of the temporal lobe and the fusiform are essential to the classification. In addition, several regions of the frontal lobe were found to be highly important but could not alone discriminate between CN, MCI, and AD. 

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  • 46.
    Mårtensson, Johanna
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Kennethsdotter, Elise
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    IVIO l at home2020Självständigt arbete på grundnivå (högskoleexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    As the population grows and gets older, the need for health care increases, both withinprimary care but also within home care. Being able to carry out smaller examinations to obtain the vital values without a trip to the hospital or that healthcare professionals travel to each patient gives great value to both partners. The care situation in Sweden in 2020 is an understaffed and periodically heavily strained. With the help of digitalisation and the advancement of technology, healthcare can be streamlined and at not least, improved. One of the companies working on a vision of a better healthcare situation is Detectivio. Detectivio was founded by Stefan Malmgren, a physician who saw a clear need for streamlining care when working at the emergency room. Together with researcher Taha Kahn, they have developed a product that can scan a face and in ten seconds get five vital values such as bloodpressure, respiratory rate, heart rate, body temperature and oxygen level in the blood. However, the product is not complete or ready to meet the market and this is where we, as a project group, step in to formulate, develop and complete the products functional aspects into a product ready to be placed on the market. The purpose of the project is to outline possible target groups, their needs and requirementsfor the product. Creating a prototype to test the user experience. The effect of this project will be to offer comfort and safety in the form of high-quality healthcare through time-efficientmeans. The primary target groups were categorized as "technical person", "tool" and "medical reason". The technician wants a product for his or her own use, the group “tools” is meant those who want a product for preventative purposes or as a supplement to existing healthcare products. Finally, we have those in need of medical treatment or supervision. It may be someone who is conically ill and sees a great need to be able to measure their vital values in the home. The result is a fully automated product that enables safe and secure healthcare in the home. The product is activated with the help of sensors that sense movement. Through clear visual means such as a display and lights, the product communicates with the user. All functions are controlled by an Arduino whose code is written by the project team. Since the product does not require user contact, it can contribute to reduced infection risk. The product is a rectangular box of 250 x 176 x 160 mm made in PLA and plexiglass with holes for two cameras, two distance readers, a display and power cable output. The product weighs just over 4 kilos which makes it easy to move. With a simple and unobtrusive design, this product can become part of the everyday interior of the smart home of the future.

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    fulltext
  • 47.
    Neelakantan, Suraj
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab). Year:.
    Kalidindi, Sai Sushanth Varma
    Högskolan i Halmstad, Akademin för informationsteknologi, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR Centrum för tillämpade intelligenta system (IS-lab).
    Analyzing white blood cells using deep learning techniques2020Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The field of hematology involves the analysis of blood and its components like platelets, red blood cells, white blood cells. The outcome of this analysis can be vital in determining the condition of the human body and it is important to obtain accurate results. A deep learning algorithm scans over the given input data for unique features and learns them. Then it identifies these features and correlates them to give the result. This can save a significant amount of time and manual work. In contrast, a traditional machine learning algorithm requires the developer to carry-out the feature engineering. This thesis involves the analysis of white blood cells (WBC) using deep learning techniques. In collaboration with a hematology company HemoCue AB based in Angelholm, we will be developing deep learning algorithms for the analysis of white blood cells in the HemoCue R WBC DIFF System. Predominantly, there are two stages in this thesis. The first stage is white blood cell identification, which is used to calculate the number of white blood cells in the given blood sample. The next stage is to identify the different types of white blood cells with which the concentration of each type of WBC in the given blood sample is calculated. We have explored different classification approaches like ’one vs all’ and ’4-class classifier’, and have developed two CNN architectural designs i.e. ’multi-input’ and ’multi-channel’. On comparing the performance of all these design approaches, a final integrated model is put forth for the analysis of WBCs in the company’s device. The proposed ’one vs all’ classification approach combined with a 3-class CNN classifier has yielded very promising results with a combined accuracy 95.45% in WBC identification and 90.49% in WBC differential classification.

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  • 48.
    Niemand, Ponthus
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Saladdin, Aya
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Management of ergonomic aspects in early design phases using virtual reality: Mapping of ergonomic aspects in early design phases, How would mordern technology like VR be used?2018Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Volvo Group är ett av världens ledande tillverkare av bland annat lastbilar, bussar, entreprenadmaskiner och motorer för marina och industriella applikationer. Volvo Group äger totalt 10 olika märken, dessa är: Volvo Trucks, UD Trucks, Renault Trucks, Mack Trucks, Group Trucks Asia & JVs, Volvo Construction Equipment, Volvo Bus, Volvo Penta, Volvo Financial Services och Governmental Sales. Initiativet till projektet togs av Metod och Processutvecklings avdelningen på Volvo Group Trucks Operations (GTO), som är den delen av Volvo Group som utför själva sammansättningen av lastbilar.

    Volvo GTO finns i flertal olika länder världen över vilket leder till att arbetsprocesserna kan skilja mellan länderna. För att kunna standardisera ett arbetssätt där konstruktören (komponent ägaren) tillsammans med geometri arkitekten kan göra en första ergonomisk analys på den berörda komponenten. För att detta ska vara möjligt så tog projektet fram en handbok på hur man som komponentägare skall gå tillväga för att få en så bra och korrekt analys som möjligt.

    I denna kandidatarbete tas det upp förslag på hur VR hade kunnat hjälpa till ett utvärderingsverktyg redan i konstruktionsstadiet när en ny produkt/komponent ska tas fram eller om det ska göras förbättringar på en befintlig komponent. Kandidatarbetet har valt att fokusera mest på hur konstruktören och geometri arkitekten ska kunna utvärdera de ergonomiska aspekterna med VR som hjälp.

    Projektet har undersökt två user case varav ett av dem presenteras i denna rapport. Detta gäller monteringen av värmeskydd. Anledningen till att just denna montering valdes är på grund av dess dåliga ergonomi och åtkomlighet. Projektet valde att göra både en RULA-analys och PLIBEL-analys. RULA-analysen gav hög totalpoäng, 7 av 7 medan PLIBEL endast är en analys på arbetsplatsen vilket gav ett bra underlag för fortsatt arbete.

    Studien visade att VR är ett väldigt bra hjälpmedel vid analys av ergonomiska aspekter i tidig design fas. Det ger relevanta resultat och har potential för besparingar i resurser och kostnader inom utvecklingsprocessen.

    För att förbättra kandidatarbetes resultat har det gjorts besök på ESI-Group som har gått in med stöttning i form av VR utrustning och workshop. Detta gav projektmedlemmarna en inblick på möjligheterna man har med VR.

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  • 49.
    Nilsson, Andreas
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Almén, Martin
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Sundström, Johan
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Sond för mätning av tandfickors djup2012Självständigt arbete på grundnivå (högskoleexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Detta examensarbete gjordes under hösten 2011 och beställdes av Accesia AB, som ville tafram en prototyp till ett elektroniskt verktyg för mätning av tandfickors djup, kallatfickdjupsmätning. Verktyget är tänkt att användas vid veterinärtandvård för hundar och katter.Detta är en procedur som idag görs med en graderad sticka och som ger upphov till risk förfelaktiga avläsningar. Användaren ska med hjälp av mätutrustningen kunna mäta fickdjupelektroniskt. Systemet presenterar sedan mätvärdena och skickar dessa till en värddator.I rapporten beskrivs hur vi har gått tillväga från idé till färdig prototyp. Slutresultatet ska intebetraktas som en färdig produkt, utan snarare som en illustration av konceptet. Resultatetstämde överrens med den kravspecifikation som togs fram i samråd med projektbeställaren.

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  • 50.
    Nilsson, C M
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Malmqvist, L.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Carlsson, J.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Red fluorescence sensor for noncontact on-line measurements in paper production2001Ingår i: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, E-ISSN 1560-2303, Vol. 40, nr 8, s. 1674-1681Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A robust sensor is developed for on-line measurements in paper production. The sensor is designed for optimal response to lignin in paper. A diode laser operating at 630 nm is used for excitation and fluorescence light in the wavelength region 660 to 740 nm is detected. A compact photomultiplier tube is used for fast detection with a high SNR. The measuring spot is 90 mum in diameter. All optical and electronics components are housed in a small 250X140X90 mm(3) box. Because the system can make up to 1.2 million measurements/s the distance between adjacent measuring points can be as short as about 20 mum, even at a paper speed of 25 m/s, as is common with a modern newsprint paper machine. The recording system can store data continuously for 45 min at this sampling rate and data from three more sensors can be recorded simultaneously with the same resolution. This high-capacity sensor system can monitor the behavior of a paper machine at much higher time and space resolution than has traditionally been possible. From test runs on four different newsprint paper machines we observed the existence of small spots of high fluorescence in the paper from one machine, characteristic behavior with a significantly lower level of fluorescence in periodical sections of about 200 m in another machine, and that wire marks and periodical patterns could be very well identified from the fluorescence recordings. Such data have proven to contain important information for the papermaker concerning, for example the relative shrinkage of the paper web in the drying section of the paper machine. © 2001 Society of Photo-Optical Instrumentation Engineers.

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