This thesis puts forward a new solution to provide the reliable network to the Internet Service Provider (ISP). This study mainly focuses on the ISPs network to provide reliability and the load balancing. It offers a guide line for the best reliable solution to the ISPs, individual organizations or other types of service providers which are engaged in providing reliable communications to their subscribers. These reliable services may be real time communications which include weather forecasts, tracking systems, online Internet protocol TV (IPTV) programs and many other ISPs services which are totally depend on the reliable network.

With the appearance and expansion of Internet subscribers all over the world, ISPs services are becoming more popular. The rapid increase of connection-demand and highly traffic network is the main reason behind the need to scale reliable network. To offer better solutions, a new theoretical and practical approach should be considered that can cover the reliable network.

The suggested network structure monitors the links, spreads the network traffic with multiple devices and takes a backup (redundant) link automatically when changes occur in the network topology. In order to support the redundancy, load balancing and reduce the failover time, the hot standby routing protocol (HSRP) is implemented on the suggested network. As we have analyzed that in any network, scalability bringing to raised the network traffic broadcast issue. Broadcast storms can be prevented by setting threshold values of traffic-filters. The threshold level helps to control broadcast traffic in networks.

With regard to suggested solutions, it is necessary to observe the limitations and advantages of the recommended reliable network structure. Therefore, this research will include the advantages and limitations of the techniques used to offer ISP services such as scalability, security and IPv6.

This paper deals with performance measurements in 802.11g Wireless Multi-Hop Net-

works at different locations. After an introduction to 802.11g Wireless LANs and

Wireless Multi-Hop Networks, the testing environment consisting of hardware, soft-

ware, configuration, and three different locations is described. Before test series for the

actual measurements are defined, carried out reference tests provide reference perfor-

mance data and prove that the used hardware is suitable for testing Wireless Multi-Hop

Networks. Then the results of the measurements are discussed which show the influ-

ence of multiple hops on throughput and latency for single and multi channel Multi-Hop

Networks in indoor, outdoor, and urban environment. Finally, an outlook to further

tests and improvements of Wireless Multi-Hop Networks is given.

Managing a network is a very big functional area along with performance, devicemaintenance, security, performance, monitoring, troubleshooting, plan of changeand etc. Among all of these monitoring plays a vital role. It can cover a wide area ofnetwork management. Monitoring is the only way to find out whether the networkis functioning according to plan. In order to know what is happening in a network,how its functioning at any given time, a network should have a logging system. Nowa day this logging activity is done by Network monitoring tool. It lets user know thestatus of the network at any given time. This logging can give the user a wide viewwhat can't be seen in general. For example the statistics of a week or month, even ayear. Monitoring is a very important issue in an organization network which aroseover the time.In this project we are going to implement some well known network monitoringtools in a real world scenario and we will investigate how this monitoring tool canhelp network administrators to monitor a network . Moreover, what kind ofinformation we can extract from a network by these tools.The purpose of this project is to get an overall idea about the importance of networkmonitoring and what are the facts need to be considered while monitoring anetwork. There are lots of pros and cons in monitoring a network. So choosing theappropriate tool for monitoring is very important. Monitoring a network with theleast effects on network performance is the best solution in case of monitoring.The outcome from these monitoring tools is a wide range of useful data andintegration of these data produces the status of the network at any give time.Moreover these data will be logged to create a statistical report. Different users suchas a network admin and organization can use this information from differentperspectives to make a network more efficient for users.

In this research oriented master’s thesis we have proposed a future vision of ITS (Intelligent Transport Systems) by utilizing the novel concept of HWA (Heterogeneous Wireless Access). Our proposal is backed by the investigation of the results of experiments conducted at CERES (Centre for Research on Embedded Systems), Halmstad University, Sweden to evaluate the quality of communication for V2V and V2I by using the IEEE 802.11p standard. We have also identified the expected scenarios with need of any other communication technology in replacement of IEEE 802.11p for V2V and V2I communication. We have also investigated the relevant research projects, experiments and their results on the basis of predefined constraints. In the investigated research projects the concept of HWA has been correlated with our proposal of HWA for ITS. We have identified that for smooth integration of any communication technology with IEEE 802.11p, an efficient and smart vertical handover protocol or method will be required. We have presented a blue print of a custom designed vertical handover technique which can be implemented for future ITS with further enhancements and experimental evaluations. We have also evaluated the worst case scenarios to assess the suitability of the HWA for the ITS. We proposed few solutions based on the evaluation of communication scenarios for the integration of IEEE 802.11p with other wireless communication technologies. Finally we have provided some conclusions and suggested future researches which must be conducted to realize the dream of ITS with support of HWA.

Live Analysis is a concept that in this paper means analyzing a computer system while it is running. This can be done for several reasons, such as when there is a risk that the system has encryption which can be activated when the system shuts down. Otherwise, it is common if you want to examine network connections, active processes or other phenomena that can be volatile, i.e. disappear when the system shuts down. This work will focus on countermeasures to live forensic analysis and describe different methods and strategies that can be used for these countermeasures. For example, we wrote a program that automatically shuts down the system when you insert a USB memory stick or any other media. These are usually the media which you have your forensic programs on when you do a live analysis. Other important elements of the work are the use of encryption, timestamps and malicious code for challenging live analysis. Our analysis of the topic shows that it is relatively easy to prevent that a live analysis can be performed in a reliable way.

In this thesis, we employ optical flow features for the detection of the rigid or non‐rigid single object on an input video. For optical flow estimation, we use the Point Line [PL] method [2] (as a local method) to estimate the motion of the image sequence which is generated from the input video stream. Although the Lukas and Kanade [LK] is a popular local method for estimation of the optical flow, it is weak in dealing with the linear symmetric images even by use of regularization [e.g. Tikhonov]. The PL method is more powerful than the LK method and can properly separate both line flow and point flow. For dealing with rapidly changing data in some part of an image (high motion problem), a gaussian pyramid with five levels (different image resolutions) is employed. In this way, the pyramid height (Level) must be chosen properly according to the maximum optical flow that we expect in each section of the image without iteration. After determining the best‐estimated optical flow vector for every pixel, the algorithm should detect an object on video with its direction to the right or left. By using techniques such as segmentation and averaging the magnitude of flow vectors the program can detect and distinguish rigid objects (e.g. a car) and non‐rigid objects (e.g. a human). Finally the algorithm makes a new video output that includes detected object with flow vectors, the pyramid levels map which has been used for optical flow estimation and a respective binary image.

How can a multi project organisation use Wiki to support improvement of knowledge management and project evaluation to become a learning organisation? The main purpose of this thesis is to give management and employees a better understanding of how Wiki supports knowledge management and project evaluation. The second purpose is to illustrate possible difficulties and pit falls that comes with the implementation of Wiki based learning. The theoretical framework initiates by explaining multi project organizations, then describes Argyris and Schöns theories about organizational learning and learning organizations. The second half of the theory chapter brings up theories about important areas for a learning organization. We have used a qualitative approach to gather profound data for the study. The empirical framework presents the fallout of the interviews we had with the studied company. Our study demonstrates how Wikis can be a great support to improve knowledge management and project evaluation. A Wiki functions as a knowledge repository that integrates divisions in an organization and facilitates to take part of, document and share knowledge. The study also demonstrates that problems can occur when implementing a Wiki. This is shown by managerial resistance due to the attitude towards knowledge management and an uncertainty about quality control of a Wiki’s content. To answer this resistance the employees can suggest a demonstration where they during a period of time use Wiki to describe when it could have benefited them in the daily activities. To be follow up with a trialperiod if the outcome is successful.

Social media has increased exponentially since the Internet reached people's homes during the 90's. The social media Facebook alone has 243 million users in Europe, social media also became a primary choice for most users to interact with each other. In a  world where the information flow and each relationship are constant, a flaw emerged in how the social media interacts with the user. To investigate how individuals experience notifications in social media, affect theory by Silvan Tomkins was used and then supplemented by a literature review. The notifications were then examined qualitatively  using tests and  with the help of users in a focus group setting. This study resulted in  a defined set of emotions that individuals experience of notifications as well as  opinions  about  existing  functionality  and  proposed guidelines from a user-centered perspective.

This thesis aims to develop an automatic testing tool for StreamBits, a programming

language for parallel stream processing, currently being developed by Jerker Bengtsson at

Halmstad University as part of his PhD project. StreamBits is an extension of StreamIT,

developed at Massachusetts Institute of Technology(MIT), to include features that make

it more suitable for 3G baseband applications.

The cost of verifying the functionality of software has lead to the development of several

tools for automatizing the testing process. These tools are all language specific, therefore

a tool for StreamBits needs to be developed. This is done by evaluating the techniques

used in other test tools designed for other programming languages and use this information

to create a test tool suitable for StreamBits. The goal is to make a user friendly

tool with capability of performing both specification tests and verification of stream rates.

The results of our project are a well functioning specification based testing tool implemented

as a package in the Java StreamBits framework. The tool can test properties

of programs using specifications written as Java predicates and can verify stream rates

for single threaded parts of StreamBit programs. The tool can also handle, and perform

tests on StreamBit programs that cause the framework to stall. For each test performed

a detailed log is generated including results from the specification test and stream rate

test.

I en värld där många samhällsfunktioner och kontakter numera knyts och förvaltas via Internet finns en grupp som lätt glöms bort, nämligen dyslektiker. De tillhör också en grupp som sällan undersökts i Internetkontexter, därför valde vi att utgå ifrån dem.

Vi har undersökt hur webbplatser som följer tillgänglighetsriktlinjer, utifrån onlinebaserade automatiska testverktyg, relaterar till våra användares upplevda till¬gänglighet och användbarhet.

Vi använde onlinebaserade automatiska testverktyg för att välja ut fyra webbplatser, två med låg- och två med hög tillgänglighetsranking. Vi lät sedan tio användare med dyslexi och en kontrollgrupp testa webbplatserna. Därefter fick de besvara en enkät för att fånga deras upplevelser av interaktionen med webbplatserna.

I analysen av enkätsvaren kom vi bland annat fram till att det varken fanns signifikanta skillnader mellan de olika användargrupperna eller mellan de olika webbplatsernas rankning gällande upplevd tillgänglighet och användbarhet.

Web breaks are considered as one of the most significant runnability problems

in a pressroom. This work concerns the analysis of relation between various

parameters (variables) characterizing the paper, printing press, the printing

process and the web break occurrence. A large number of variables, 61 in

total, obtained off-line as well as measured online during the printing process

are used in the investigation. Each paper reel is characterized by a vector x

of 61 components.

Two main approaches are explored. The first one treats the problem as a

data classification task into "break" and "non break" classes. The procedures

of classifier training, the selection of relevant input variables and the selection

of hyper-parameters of the classifier are aggregated into one process based on

genetic search. The second approach combines procedures of genetic search

based variable selection and data mapping into a low dimensional space. The

genetic search process results into a variable set providing the best mapping

according to some quality function.

The empirical study was performed using data collected at a pressroom

in Sweden. The total number of data points available for the experiments

was equal to 309. Amongst those, only 37 data points represent the web

break cases. The results of the investigations have shown that the linear

relations between the independent variables and the web break frequency

are not strong.

Three important groups of variables were identified, namely Lab data

(variables characterizing paper properties and measured off-line in a paper

mill lab), Ink registry (variables characterizing operator actions aimed to

adjust ink registry) and Web tension. We found that the most important

variables are: Ink registry Y LS MD (adjustments of yellow ink registry

in machine direction on the lower paper side), Air permeability (character-

izes paper porosity), Paper grammage, Elongation MD, and four variables

characterizing web tension: Moment mean, Min sliding Mean, Web tension

variance, and Web tension mean.

The proposed methods were helpful in finding the variables influencing

the occurrence of web breaks and can also be used for solving other industrial

problems.

In the last few years, the number of real-time applications has increased. These applications are sensitive and require the methods to utilize existing network capacity efficiently to meet performance requirements and achieve the maximum throughput to overcome delay, jitter and packet loss. In such cases, when the network needs to support highly interactive traffic like packet-switched voice, the network congestion is an issue that can lead to various problems. If the level of congestion is high enough, the users may not be able to complete their calls and have existing calls dropped or may experience a variety of delays that make it difficult to participate smooth conversation.

In this paper, we investigate the effect of priority levels on soft real-time performance. We use the priority queues to help us manage the congestion, handle the interactive traffic and improve the over all performance of the system. We consider switched multi-hop network with priority queues. All the switches and end-nodes control the real-time traffic with “Earlier Deadline First” scheduling. The performance of the network is characterized in terms of the average delay, the deadline missing ratio and the throughput.

We will analyze these parameters with both the bursty traffic and evenly distributed traffic. We will analyze different priority levels and will see how the increase in priority level increases the performance of the soft real-time system.

Different types of wireless network systems have been developed to offer Internet access to mobile end users. Now days a burning issue is to provide the network facility to end users on anywhere and anytime bases. Typical examples of wireless networks are 3G and WLAN (wireless local area network). An important issue is to integrate these heterogeneous networks and manage the mobile nodes while moving across heterogeneous networks with session continuity, low latency for handover between networks that are based on different technologies (vertical handover) and minimum packet loss. To achieve this, it is important to find the right point in time to perform a handover between two networks and to find a new network that, in fact, improves the connectivity over a reasonable time span. In this thesis, we propose vertical handover techniques for mobile users, based on predictive and adaptive schemes for the selection of the next network. The handover decision between the technologies takes the velocity of the mobile node, battery condition of mobile node, signal to interference ratio (SIR), application requirements and received signal strength RSS) as decision parameters. In order to reduce unnecessary handover, the concept of dwell timer is used and to reduce the handover latency, the predictive mode of Fast Mobile IPv6 (FMIPv6) and for minimum packet loss, the concept of tunnelling and buffering of packets on new access router in advance are proposed.

Photodetectors are a kind of semiconductor devices that convert incoming light to an electrical signal. Photodetectors are classified based on their different structure, fabrication technology, applications and different sensitivity. Infrared photodetectors are widely used in many applications such as night vision, thermal cameras, remote temperature sensing, and medical diagnosis etc.

All detectors have material inside that is sensitive to incoming light. It will absorb the photons and, if the incoming photons have enough energy, electrons will be excited to higher energy levels and if these electrons are free to move, under the effect of an external electric field, a photocurrent is generated.

In this project Fourier Transform Infrared (FT-IR) Spectroscopy is used to investigate a new kind of photodiodes that are based on self-assembled semiconductor nanowires (NWs) which are grown directly on the substrate without any epi-layer. The spectrally resolved photocurrent (at different applied biases) and IV curves (in darkness and illumination) for different temperatures have been studied respectively. Polarization effects (at low and high Temperatures) have been investigated.  The experiments are conducted for different samples with high concentration of NWs as well as with lower concentration of NWs in the temperature range from 78 K (-195ºC) to 300 (27ºC). These photodiodes are designed to work in near infrared (NIR) spectral range.

The results show that the NW photodetectors indeed are promising devices with fairly high break down voltage, change of photocurrent spectra with polarized light, low and constant reverse saturation current (Is). The impact of different polarized light on photocurrent spectra has been investigated and an attempt has been made to clarify the observed double peak of InP photocurrent spectrum. Our investigations also include a comparison to a conventional planar InP p-i-n photodetector.

In this work new artificial learning and innate control mechanisms are proposed for application

in autonomous behavioral systems for mobile robots. An autonomous system (for mobile robots)

existent in the literature is enhanced with respect to its capacity of exploring the environment and

avoiding risky configurations (that lead to collisions with obstacles even after learning). The

particular autonomous system is based on modular hierarchical neural networks. Initially,the

autonomous system does not have any knowledge suitable for exploring the environment (and

capture targets œ foraging). After a period of learning,the system generates efficientobstacle

avoid ance and target seeking behaviors. Two particular deficiencies of the forme rautonomous

system (tendency to generate unsuitable cyclic trajectories and ineffectiveness in risky

configurations) are discussed and the new learning and controltechniques (applied to the

autonomous system) are verified through simulations. It is shown the effectiveness of the

proposals: theautonomous system is able to detect unsuitable behaviors (cyclic trajectories) and

decrease their probability of appearance in the future and the number of collisions in risky

situations is significantly decreased. Experiments also consider maze environments (with targets

distant from each other) and dynamic environments (with moving objects).

This is a part of the project “Radio telescope system” working at 1.42 GHz, which includes designing of patch antenna and LNA. The main objective of this thesis is to design a two stage low noise amplifier for a radio telescope system, working at the frequency 1.42 GHz. Finally our aim is to design a two stage LNA, match, connect and test together with patch antenna to reduce

the system complexity and signal loss.

The requirements to design a two stage low noise amplifier (LNA) were well studied, topics including RF basic theory, layout and fabrication of RF circuits. A number of tools are available to design and simulate low noise amplifiers but our simulation work was done using advanced design system (ADS 2004 A). The design process includes selection of a proper device, stability check of the device, biasing, designing of matching networks and layout of total design and fabrication. A lot of time has been

spent on designing of impedance matching network, fabrication and testing of the design circuits and finally a two stage low noise amplifier (LNA) was designed. After the fabrication work, the circuits were tested by the spectrum analyzer in between 9 KHz to 25 GHz frequency range. Finally the resulting noise figure 0.299 dB and gain 24.25 dB are obtained from the simulation.

While measuring the values from the fabricated circuit board, we found that bias point is not stable due to self oscillations in the amplifier stages at lower frequencies like 149 MHz for first stage and 355 MHz for second stage.

Since the introduction of networks, they have been used amongst home users, companies and organizations and most damage on the network is due to inappropriate security configurations. To secure networks, a protocol suite can be used to encrypt and authenticate all IP packets of a session. Therefore, this report will include the advantages and possible solution of some techniques used to offer increased network security such as scalability and data confidentiality. Captures of traffic sent using the two security techniques, IPSec/VPN and GRE-Tunnel will be monitored. The objective behind this project is to configure a network with these two different tunneling techniques and compare the security and network performance. The report also describes the security problems encountered by networks such as the ignorance of network users, vulnerabilities and the security of the devices.IPSecis a standard security protocol solution for TCP/IP, and it provides security through authentication, encryption and data integrity. GRE encapsulates packets and create a logical hub-and spoke topology of virtual point-to-point connections. The Jperf-tool is used to measure network performance and show specific details while another tool, Wireshark is used to analyze the information captured during transmission of data sent using IPSEC and GRE. The comparison further finds that IPSec-tunnel technique makes data transfers very secure but causes network performance disadvantages in comparison to a GRE solution.

Internet security (Network security) is a big topic that is very important in our society communication system, but it is extremely dynamic and wide in scope. This is the reason that many companies and organizations invest heavily in a dedicated infrastructure security and highly trained specialists.The aim of security monitoring and preventing the network from cyber threats requires vigilance over the network equipment. The case study of this thesis is to provide the possible solution to the problems encountered by the namely network users such as: Internet Game Center (Centrum Halmstad, Sweden) and, the Blueville Internet Cafe (Ede, Nigeria).Our research and information collected over the telephone and a visit at the nearest office. We concluded that both companies mentioned above experienced similar cyber threats. The two companies have internal and external threats such as accessing the network via ssh by using it brute force attack, network war-driver, the installation of spyware, password sniffer, viruses, SQL injection and PHP attacks (web attacks) on the networks. The cyber threats virus and spyware are among the big internet threat to users, organization and companies.We carry out experiments in the lab to tests for threats such as brute force (ssh) attack, password sniffer and war-driver in the Wireless environment. From the results, we are able to the select WPA2 using 802.1x as the best possible way to limit and reduce the strength of cyber-attacks, and as a suggested solution to the namely café problems in our report. We also list different suggestion and solution to the cyber café attacks from our research papers and information gathers from different sources such as library, internet, seminar and textbooks.

The existence of high load and latency in the CAN bus network would indeed lead to a situation where a given message crosses its deadline; this situation would disturb the continuity of the required service as well as activating fault codes due to delay of message delivery, which might lead to system failure.

The outcome and goal of this thesis is to research and formulate methods to determine and model busload and latencies, by determining parameters such as alpha and breakdown utilization, which are considered as indications to the start of network breakdown when a given message in a dataset start to introduce latency by crossing its deadline which are totally prohibited in critical real time communications.

The final goal of this master thesis is to develop a TOOL for calculating, modeling, determining and visualizing worst case busload, throughput, networks’ breakdown points and worst case latency in Scania CAN bus networks which is based on the J1939 protocol.

SCANLA (The developed CAN busload analyzer tool in this thesis) is running as an executable application and uses a Graphical User Interface as a human-computer interface (i.e., a way for humans to interact with the tool) that useswindows,icons and menus and which can be manipulated by a mouse.

This thesis work provides the implementation of 3D structure tensor on a Massively Parallel Processor Array (MPPA), Ambric 2045.

The 3D structure tensor algorithm is often used in image processing applications to compute the optical flow or to detect local 3D structures and their directions. The 3D structure tensor algorithm (3D-STA) consists of three main parts: gradient, tensor and smoothing. This algorithm is computationally expensive due to many multiplications and additions which are required to calculate the gradient (edge), the tensor and to smooth every pixel of the image. This is why this algorithm is very slow to run on a single processor. Therefore, it is important to make it parallel for high performance computation.

This thesis provides two parallel implementations of 3D-STA; namely coarse-grained parallelism and fine-grained parallelism. Ambric has 336 processors. Only 49 processors are used in coarse-grained implementation and 165 processors are used in fine-grained implementation. The performance of the two implementations is measured using a video stream input, consisting of a sequence of images of size 20x256x256. The performance of the coarse-grained parallelism implementation is 25 frames per second (fps) and the one of the fine-grained parallelism implementation is 100 fps. Thus the fine-grained version is four time faster than the coarse-grained one.

Additionally, the results are compared with the result of the Matlab implementation, running on Intel(R) Core 2 duo @2.10 GHz processor and also compared with another parallel optical flow implementation, in terms of speed and efficiency. The coarse-grained implementation is 58 times faster than the Matlab implementation and it achieves approximately half of the performance of the other parallel optical flow implementation. On the other hand, the fine-grained implementation is 230 times faster than the Matlab implementation and more than twice as (100/43) fast as the other parallel optical flow implementation.

These performance results are satisfactory and the results that our parallel implementations can be considered for real-time applications.

The three dimensional structure tensor algorithm (3D-STA) is often used in image processing applications to compute the optical flow or to detect local 3D structures and their directions. This algorithm is computationally expensive due to many computations that are required to calculate the gradient, the tensor, and to smooth every pixel of the image frames. Therefore, it is important to parallelize the implementation to achieve high performance. In this paper we present two parallel implementations of 3D-STA; namely moderately parallelized and highly parallelized implementation, on a massively parallel reconfigurable array. Finally, we evaluate the performance of the generated code and results are compared with another optical flow implementation. The throughput achieved by the moderately parallelized implementation is approximately half of the throughput of the Optical flow implementation, whereas the highly parallelized implementation results in a 2x gain in throughput as compared to the optical flow implementation. © 2012 IEEE.

In industries today the demand for reading the state of industrial equipment and thus prevent machine breakdown, is increasing. The company HMS Industrial Networks AB has a product on the market, Netbiter EC350 that is used to read sensors and thus find out the condition of industrial equipment. By reporting scanned data to users through a cloud service, users can keep track of their equipment.

When developing Netbiter EC350 a slot was made for a Bluetooth module to offer clients a wireless reading in future developments. In this project a prototype was made to show how this Bluetooth communication can be implemented.

The goal of the project was to create a Bluetooth communication between a Bluetooth sensor and Netbiter EC350. A user interface was made to allow the user to read sensor values.

The result of the project shows how a Bluetooth communication can be implemented to read sensors wireless and therefore it fulfills its purpose and goal. The user can find connectable Bluetooth devices, connect to a device and read measured values through a user interface.

The prototype demonstrates how a Bluetooth communication with a Netbiter EC350 can be implemented and the project is therefore considered to be a good basis for future development.

Over the last three decades, computer architects have been able to achieve an increase in performance for single processors by, e.g., increasing clock speed, introducing cache memories and using instruction level parallelism. However, because of power consumption and heat dissipation constraints, this trend is going to cease. In recent times, hardware engineers have instead moved to new chip architectures with multiple processor cores on a single chip. With multi-core processors, applications can complete more total work than with one core alone. To take advantage of multi-core processors, we have to develop parallel applications that assign tasks to different cores. On each core, pipeline, data and task parallelization can be used to achieve higher performance. Dataflow programming languages are attractive for achieving parallelism because of their high-level, machine-independent, implicitly parallel notation and because of their fine-grain parallelism. These features are essential for obtaining effective, scalable utilization of multi-core processors.

In this thesis work we have parallelized an existing audio codec - Adaptive Multi-Rate Wide Band (AMR-WB) - written in the C language for single core processor. The target platform is a multi-core AMR11 MP developer board. The final result of the efforts is a working AMR-WB encoder implemented in CAL and running in the OpenDF simulator. The C specification of the AMR-WB encoder was analysed with respect to dataflow and parallelism. The final implementation was developed in the CAL Actor Language, with the goal of exposing available parallelism - different dataflows - as well as removing unwanted data dependencies. Our thesis work discusses mapping techniques and guidelines that we followed and which can be used in any future work regarding mapping C based applications to CAL. We also propose solutions for some specific dependencies that were revealed in the AMR-WB encoder analysis and suggest further investigation of possible modifications to the encoder to enable more efficient implementation on a multi-core target system.

Wireless sensors nodes are made up of small electronic devices which are capable of sensing, computing and transmitting data from harsh physical environments like a surveillance field. These sensor nodes majorly depend on batteries for energy, which get depleted at a faster rate because of the computation and communication operations they have to perform. Communication protocols can be designed to make efficient utilization of energy resources of a sensor node and to obtain real time functionality. A set of previously reported routing and MAC (Medium Access Control) layer protocols has abilities to achieve energy efficiency and supports real-time functionality. A detailed study of these protocols has been carried out and comparison tables give an overview of the protocol’s performance on some factors like latency, scalability and energy awareness. Conclusions have been drawn using the comparison table parameters of how the protocol performs when utilized for a surveillance application and what kind of tradeoff they show.

The conclusions and tabular information drawn here are from our theoretical analysis of protocols referred from journals; there is no simulation work done in this thesis.

The purpose of this report is to implement the wireless network in a company withtwo different sites which is located in Riga and Malmo. The main task of this reportis to implement and configure wireless industrial network. This report is based oninformation we gathered from the ABC Company about their requirements for awireless network.Requirements of this ABC Company is focusing on their infrastructure planning,security and implementing them. Benefits and drawbacks of industrial wirelessnetwork will be described briefly in this report to get some idea how ABC Companywill face the problem when they will implement their wireless network.

Uppsatsen är ett resultat av en kvalitativ studie som undersöker hur wikis och bloggar

förbättrar intern datoriserad kommunikation och kunskapsspridning i en IT-projektgrupp. Den kvalitativa studien genomfördes i form av personliga intervjuer med en projektledare och två systemutvecklare. Intervjuerna resulterade i empiriskt material rörande projektgruppens kommunikation och kunskapsspridning. Materialet jämfördes och analyserades mot den teoretiska referensramen och mynnade ut i ett antal slutsatser. Studien visar, bland annat, att wikis och bloggar gör information mer tillgänglig eftersom den dokumenteras på ett och samma ställe. Den enkla användningen och fria strukturen uppmuntrar också fler personer att bidra med sina idéer och tankar vilket leder till ökad delaktighet.

With a rapid growth in wireless technology in recent years, Mobile IP has become very important for consumers and businesses by providing mobility based on IP addresses using several applications, which keep the employees connected with each others with critical information. In mobile IP the node can change its location by maintaining the same IP address and keep connected to the internet, which solves the issue of terminating the communication once it moves.

Since Mobile IP uses open airwaves as a transmission medium, it is subject to the many security threats that are routed in mobile IP network .Protecting mobile IP from threats and attacks is one of the most challenging task now days. IPSec is a standard security protocol solution for TCP/IP network that provides security through Authentication, Encryption and data integrity services. Mobile IP data traffic can be secured by combining with IP Security (IPSec) protocol.

This thesis describes Mobile IP operations, security threats, different existing methods for securing mobile IP and then IPSec standard, how it works and why IPSec is the best solution. This thesis also describes how to combine IPSec with a mobile IP to provide a solution called (SecMIP) that protects the mobile device’s communication from any threats. Finally it describes Mobile IPv6, binding update and associated security concern.

On some occasions it may be inappropriate with a cameraman behind the camera. In somecases there is no cameraman available or it is a smaller event, like a family celebration, to befilmed. It can also be difficult for a cameraman to shoot from certain angles. One solution forthis kind of situations can be to remotely control the camera movements. There are thosekinds of solutions on the market today but they either address professional filmmakers or thefunctionality is limited, for example by the absence of wireless remote control.This project aims to develop a solution to the problem with absence of wireless remote controland also a solution with more flexibility and less complexity than today’s solutions. The maindifference between this and existing solutions is the use of Bluetooth technology ascommunication between the devices. The project resulted in a solution consisting of twounits; one operating unit where the camera is mounted and a remote unit for control of theoperating unit. The remote unit is managed by the filmmaker. The remote unit consist of anAndroid application on a smart and which communicates with the control unit via Bluetooth.