In a society where the popularity of mobile video streaming increases, the need to understandthe affect on the power consumption on mobile devices increases. This thesislooks into which broadcasting protocol to use when trying to optimize the energy consumptionand startup delay while receiving a video from a transmitting source using scalablestreaming protocols. This thesis evaluates four different scalable streaming protocolsand how much power mobile clients consume when receiving a video over different numberof channels and how different interfaces such as 3G and WiFi affect the power consumption.The protocols are simulated using our own written simulator and a tool calledEnergyBox, which simulates both 3G and WiFi connections. The thesis also compares theprotocols with each other in two ways, the amount of energy consumed and how longthe startup delay is for each protocol. Based on these simulations and comparisons weconclude which protocol of these four provides the best energy-delay tradeoff. The resultshows that the energy consumption while usingWiFi is much less than when using 3G. FastBroadcasting is also far superior the other protocols when it comes to energy consumption.When it comes to startup delay the protocols are very even.

Syftet med denna rapport är att undersöka och sammanställa riktlinjer för att utveckla ett grafiskt användargränssnitt för ett lagersystem. För att uppnå syftet med rapporten litteraturstudier, intervjuer, observationer och en prototyputveckling utfördes. Utifrån litteraturstudier visade det sig att det inte fanns specifika designriktlinjer för utveckling av lagersystem fast det fanns allmänna riktlinjer som kan användas för design av olika system. Intervjuer med utvecklare och en utvecklingschef på företaget Qsys hjälpte till att hitta befintliga riktlinjer som företaget använder. Det visade sig att de använder allmänna riktlinjer som inte är specifika för lagersystem. För att hitta mer specifika riktlinjer observerade vi några lagerarbetare för att bättre förstå hur de integrerar med det befintliga systemet som de använder. Utifrån analysen av observationerna, upptäcktes det nya riktlinjer. Med hjälp av de allmänna riktlinjer som hittades i litteraturen och riktlinjer som upptäckes efter analysen av observationer, utvecklade vi en prototyp som sedan testades. Resultatet vi fick utifrån analysen av intervjuerna med lagerarbetarna efter prototyptestning, hjälpte med att hitta ytterligare specifika riktlinjer.För att utveckla ett användarvänligt lagersystem, behöver man ett användarvänligt gränssnitt. I denna rapport presenterar vi några riktlinjer som man kan använda sig av för att utveckla ett användarvänligt gränssnitt för lagersystem.

Utifrån den framtagna frågeställningen ämnar denna rapport att redogöra hur webbapplikationen Vardagsboxen konstruerats för att uppfylla dess vision om användbarhet. Teori, uppkomna resultat och användartester har lett fram till att en användbar webbapplikation grundar sig i hur användaren upplever denna genom bland annat responsivitet och aktiv återkoppling från webbapplikationen. Därtill är färgval samt antalet använda färger viktigt för att främja användbarhet och i förlängningen vara visuellt tilltalande för den tänkta användarskaran. En användbar webbapplikation ska även vara enkel i design och igenkännbar. Arbetssättet Scrum har applicerats för att strukturera upp arbetsgången under olika iterationer där teknisk utveckling varit i fokus. Vardagsboxen är en internetbutik i form av en prenumerationstjänst där konsumenterna kan prenumerera på vardagsartiklar. Rapporten behandlar webbapplikationens uppbyggnad samt skapandet av en lättnavigerad och användbar tjänst med syfte att frigöra tid i vardagen åt dess användare. Med hjälp av en grundlig prototypframtagning i kombination med analyser av bakomliggande tekniska lösningar, design och resultat från användartester har utvecklingsteamet lyckats skapa en användbar webbapplikation. / By focusing on the established thesis, the report aims to depict how the web application Vardagsboxen has been constructed concentrating on the aspect of usability. Theory, results and user testing have led to the conclusions that a usable web application is based on how the user experiences this through responsiveness and active feedback. Furthermore, the coloring and the numbers of colors used are important to enhance usability. A usable web application should also be simple in design and recognizable. The methodology of Scrum has been implemented to structure the project during the ongoing iterations. During these iterations, technical development has been the main focus. Vardagsboxen is an internet shop where the consumers can subscribe to packages of hygiene products. The report includes the process of creating an accessible and serviceable internet shop with hopes to assist the consumers in their everyday life. Through a thorough prototype development in combination with analyzing technical solutions, design and results from usability tests, the development team has successfully created a web application while focusing on usability.

The next generation of automotive systems is self-managing. Concepts such as self-aware and self-monitoring are necessary parts of the system to be able to meet the requirements of self-configuration and self-optimization. DySCAS is a research project, funded by the European Union, which aims at developing such a system.This thesis report describes and elaborates the theory for three topics: Built-in self-test, resource monitoring and power management, all with the focus on integration in DySCAS. Resource monitoring is selected to be further investigated with design and implementation in SHAPE, the reference implementation of DySCAS.To test and verify the resource monitoring system, a load balancing scenario was created. The result from this scenario is presented in graphs for visualization and a discussion about the benefits and drawbacks of the implemented system. Finally the conclusions from both the literature study and the implementation work are summarized and some ideas on future work are presented.

This thesis describes the function and construction of a modular event detector system. Event detectors are used for solder joint reliability testing using electronic monitoring for short duration resistance changes during accelerated ageing and temperature cycling. Collected data is mainly used to study solder joints long-term properties. The system has three different monitoring functions: transient resistance detection, statistics process monitoring and periodic monitoring. In its present performance a total number of 384 channels can be monitored continuously. However the system can be expanded in steps of 96 channels, limited only by the capacity of the computers PCI-bus. The system is built around a PC equipped with the LabVIEW 6.1 programming environment and data acquisition cards from National Instruments. The circuit boards to be monitored are connected via adapter electronics. In the case of the superior electronic-kits project, four groups of 24 circuit boards are connected to the adapter electronics. To minimise the influence of environmental noise shielded and, where possible, twined cables are used.

A management platform is an integral part of any modern computer network. Its role in any kind of network (research or commercial) is undeniable. By using the management solution, the operators of the network monitor, troubleshoot and manage the network from a centra-lized location. In a research network such as the Mid Sweden University (MIUN) IPTV test bed, it also plays a very important role. Researchers can setup different configurations for the underlying network according to their research goals. MIUN IPTV test bed is expanding in the sense that it is covering a greater geographical area and more researchers are using the network in order to carry out their experiments. In this project, an attempt will be made to develop a management platform for the IPTV network. This platform will manage the whole network and will give the researchers opportunity to setup trail field by configuring the network devices according to their experiments.

Vulnerabilities are rapidly increasing everyday, posing a major threat to security products. It is due to the flaws in the software during development and human negligence. Even if we are able to find the source, it is not easy to get rid of them with the dramatic discovery of threats exposed every month. Defending against attacks, we need to understand the vulnerabilities in a large scale. The security products, which are being told to provide security, contain a lot of vulnerabilities giving a headache to the security vendors around the globe. Information security breaches are increasingly widespread. Our aim is to find and examine the vulnerabilities in security products for the last three years. The overall conclusion is that the vulnerabilities in security products always result either in arbitrary code execution, denial of service or allow an attacker to take control of the system by taking in high privileges. We investigated computer products having vulnerabilities, analyzing more than 6000 advisories. Based on that information, we have extracted vulnerabilities specifically for the security products and showed them comprehensively in statistical format. Evaluation of vulnerabilities has been done for every year and based on that information; we compared the vulnerabilities occurring in the last three years.

Today processor development has a lot of focus on parallel performance by providing multiple cores that programs can use. The problem with the current version of OpenGL is that it lacks support for utilizing multiple CPU threads for calling rendering commands. Vulkan is a new low level graphics API that gives more control to the developers and provides tools to properly utilize multiple threads for doing rendering operations in parallel. This should give increased performance in situations where the CPU is limiting the performance of the application and the goal of this report is to evaluate how large these performance gains can be in different scenes. To do this evaluation a test program is written with both Vulkan and OpenGL implementations and by rendering the same scene using different APIs and techniques the performance can be compared. In addition to evaluating the multithreaded rendering performance the new explicit pipelines in Vulkan is also evaluated.

No description available.

Telepresence robots allow people to explore remote environments, interacting to other people between long distance. A person only needs to know how to drive them in order to feel his/herself inside a remote environment. The main goal of this project is to provide a user interface that improves the user’s depth perception through a 2D visual feedback and, as a secondary target, to allow non-expert users to become familiar with the robot control interface. This thesis shows how a more user friendly interface can reduce the effort needed to drive the robot properly, especially for non-expert users. i