Regulation of rivers by dams and reservoirs is a good example where anthropogenic impact could be considerable both in the local environment, but also has major implications upstream and downstream. This study was accomplished as a literature study of the river Nile, which is extremely important for water supply. The purpose of this study was to investigate the consequences of the construction of the Aswan High Dam, to obtain a consistent flow for water supply, irrigation and power generation in Egypt. Since Egypt has a very hot and dry climate large amounts of water in reservoir is lost to the Nubian aquifer system and by evaporation. The consequences from constructing the dam are considerable.

Detta examensarbete har utforts i omradet skyddsventilation vidavdelningen for installationsteknik, Kungliga Tekniska Hogskolan.Examensarbetet omfattar 30 kurspoang och ar den avslutande delen icivilingenjorsutbildningen.Fragestallningar diskuteras om den inverkan kladsystem har for luftensrenhet i operationsrum under pagaende operation. Avsikten med arbetet aratt undersoka i vilken man operationsrumsklader av renrumskvalitetpaverkar halten av luftburna bakteriebarande partiklar under pagaendeoperation i jamforelse med konventionella kladsystem.Jag vill borja med att tacka mina handledare professor Bengt Ljungqvistoch tekn dr Berit Reinmuller, for att jag har fatt formanen att ta del av deraskunskaper samt att jag blivit utmarkt handledd och motiverad underexamensarbetets gang. Jag vill ocksa tacka professor Jan Gusten, Chalmersoch tekn lic Johan Nordenadler, Projektengagemang AB samt SahlgrenskaUniversistetssjukhuset, Berendsen Textil Service AB, Ramboll Sverige ABoch Miclev AB, vilka alla har gjort mitt examensarbete mojligt.Avslutningsvis vill jag tacka familj och vanner for uppmuntran underarbetets gang.Stockholm, januari 2010Jonas Hallberg Borgqvist3.

Järnmalmen från LKAB:s gruva i Kiruna fraktas dagligen upp ovan jord i det så kallade bergsspelet. Bergsspelet består idag utav stålvajrar, vilket har sina nackdelar. Deras egenvikt gör att tiden för underhåll ökar och produktionen påverkas negativt. En förstudie har gjorts för att undersöka huruvida syntetiska linor kan ersätta stålvajrar. Men för att testa deras hållfasthet gällande styrka, utmattning och töjning måste en testrigg byggas. Med hjälp av information från förstudien som genomförts och genom CAD-modellering tas ett konstruktionsunderlag fram till denna testrigg.  Enligt tidigare studier som genomförts kan linor av de syntetiska materialen aramid, High Modulus Polyethylene och Liquid Crystal Polymer ersätta stålvajrar.

This master thesis is a result of the work carried out for Research Electronics at Siljansnäs. The company develops customized electronical systems. Because of the rapidly increasing interest in colour displays there has been a desire within the company to represent information from sensors and electrical systems in a more advanced way.Due to the mentioned reason above we were given the assignment to solve how a colour display using the STN technique works. The technique is used by small displays, the size of QVGA. Our ambition of this diploma work is to develop a fully functionally test prototype to evaluate the LCD (Liquid Crystal Display) and the LCD controller.

AbstractThe purpose with this essay is to get knowledge about the consequences that speech-defects bring for children in pre-school ages. I got interested in this matter when I, during my teaching practice, got in touch with children carrying this specific disorder. I chose to apply qualitative interview as a method to investigate this and as a starting-point I used these aspects: How does speech-defects affect learning, understanding, friendship relations, and development in general?I interviewed three pre-school teachers in two different schools. One school in a smaller district and the other one in a middle-sized town, in the middle of Sweden.

The energy sector is facing an impending paradigm shift. Today?s technology enables the end-user to generate their own energy locally at home. Furthermore, recently developed storage technologies make it possible to balance energy demand with stored energy and integrate district heating with the local power grid. This means that in the future heat and electric power will interact and energy flows is converted over energy boundaries.

The interest for power and energy measurement has greatly raised with todays increasing electricity prices and enviromental awareness. In the search for energy efficient solutions, the measurements are more complex due to increasing of non linear components. Harmonics and non sinusoidal voltages put high demands on sampling and filtering. Meanwhile, the price must be controlled so the customer still will find it interesting to invest in smaller plants. ITT W&WW asks for a robust, heat resistant power meter with compact dimensions to allow mounting inside the casing of a pump.

An information audit identifies, among other things, organizations information resources, the information flow and the needs of the information users. The purpose of this masters thesis was to describe the management of information within a local unit of Borås municipality by putting an information audit-method in practice. The focus was on three issues: What information needs could be seen in the organization? How does the information flow through the organization? How does Sugan Henczels seven-stage model serve as a tool to map the management of information within the local unit? The study only described the situation at a certain time at the chosen organization. The seven-stage information audit model was revised and adjusted to the studied organization by only carrying out four of the seven steps: Planning, Data collection, Data analysis and Data evaluation.

?Development of methods for the planning and implementation of ditch clearing with modern methods?, is a long title for an exam work but that is what this report describes. In Sweden, we have a limited area available, and with the present development with increasing market oil prices, and enormous forces on the renewable energy sources, we need every hectare possible to protect the output of the forests. So with this in mind, many people are now considering how to increase the production of the forests that are already available. A part of production increases is to manage the existing forests, and not to allow this area to go to cultivation or become marshland. We manage our forests in a way that benefits the environment, and we consider that our working practice over the years has shown us to be correct and well functioning. A part of our way of producing forests is to ensure that we have functioning drainage systems in the forest holdings which we administer. The responsible at Holmen Skog requested a good method to make inventories of the drainage systems of Holmen forests. This Degree Project is about ways to identify and implement drainage systems with modern methods. It deals with authorities regulations, and how they operate in different counties.

This thesis addresses the driving forces behind the Swedish state?s procurement of Helicopters 14 and 16 and the decommissioning of Helicopter 4. These actions have significantly affected the Swedish Armed Forces, especially the Helicopter Wing, in carrying out their operational tasks. On numerous occasions the Helicopter Wing has been unable to perform its tasks. For instance, the Nordic Battle Group 08 had no helicopters to exercise with and, until recently, Sweden had completely lacked the ability to hunt submarines with helicopters for almost ten years.This thesis also aims to compare the decisions in 1999-2000 regarding Helicopter 14 with the decisions in 2010-2011 regarding the acquisition of Helicopter 16, to find if there is a general trend and how much the Armed Forces were able to influence decisions.

The purpose with this report is to examine how the implemented energy efficiency measures on Bokelundskolan in Växjö have had impact on the energy use. The measures which have been implemented are, new ventilation system, new heating system, optimized adjustment of the heating system, new windows with U-value 1.2 and lower window height, insulation under windows and in the crawl space. The school's energy use before and after rebuilding has been calculated with the calculation program, Vip-Energy 1.5.5.Calculations of energy use for the school with windows on U-value, 0.9 and 0.7 have also been done. The replacement of windows has been studied from a cost perspective. The conclusion is that the exchange of heat and ventilation system was the biggest contributor to reduced energy use on Bokelundskolan.

In recent years it has become more and more evident that man has contributed to much of the climate changes that have taken place during the last century. A major challenge today is to reduce emissions and energy usage at the same time as the global population is growing. To contribute to a better environment, Stockholms Stad has set at target of becoming fossil fuel free by the year of 2050. The construction of new districts is done with this goal in mind; energy efficiency and renewable energy sources are examples of methods to achieve this.Solar energy is considered to be a sustainable energy source and the most common techniques to harvest solar energy in Sweden are solar cells and solar collectors which produce electricity and heat respectively. This report aims to investigate whether an investment in any of these systems would prove to be economically beneficial at Kvarnholmen, a district under construction in eastern Nacka, Stockholm.Since the finished blueprints only cover a small portion of Kvarnholmen, the report examines the possibilities for a house where construction has already begun, Nya Kvarnen.

Årsskiftet 2003/2004 trädde Lagen (2003:778) om skydd mot olyckor i kraft. Därmed upphävdes Räddningstjänstlagen. Lagtexten kräver att kommuner skall upprätta en riskhanteringsplan för tänkbara olyckstillfällen. Vänersborgs kommun har beslutat göra så och en del i detta arbete är att sammanställa en riskanalys. Denna rapport innehåller en riskanalys för farligt gods inom Vänersborgs tätort samt riksväg 45.

Opcon Powerbox is a product developed by Opcon together with the underlying company SRM (Svenska Rotor Maskiner) where surplus heat from the industry is used through an Organic Rankine Cycle (ORC)?process to produce electricity. An ORC-process is a thermodynamic circle process in which a refrigerant is used as the working fluid. The refrigerant makes it possible for the circle process to operate at lower temperatures than the conventional Rankine process.In this master?s thesis a data analysis software for the Opcon Powerbox has been developed in which measurement data is retrieved and handled from the Opcon Powerbox.

The sun is an endless energy source and the heat it produces can be used to heatup our homes. This technology is relatively old and was introduced in the late70-s. There are two kinds of solar collectors that are most frequently used todayand these are plain solar collectors and vacuum solar collectors. The plain solarcollectors are the once that are used the most but the vacuum solar collectorshave increased more as a percentage the last couple of years.The biggest question asked regarding an investment in solar heating is if theplant is economically profitable. This question has no direct answer because itis dependent on a couple of prerequisites.