Studien går ut på att jämföra tre olika styrsystem för ventilation, nämligen CAV (Constant Air Ventilation), VAV (Variabel Air Ventilation) och DCV (Demand Controlled Ventilation). Dessa styrsystem ställs mot varandra i tre olika lokaltyper, med syfte att identifiera det mest energieffektiva styrsystemet. Ett syftet med studien är också att upptäcka vid vilka flöden det lönar sig att arbeta med VAV- och DCV-styrsystemen..

Denna rapport är ett examensarbete på C-nivå som görs i sammarbete med teknikkonsulten Ramböll. Det vanligaste sättet att ventilera en byggnad idag är med så kallad CAV-ventilation (Constant Air Volume). Denna metod bygger på att ett luftflöde bestäms för rummet och upprätthålls med konstant flöde. En annan metod är så kallad VAV (Variable Air Volume) som bygger på att flödet varierar efter behovet. Anledningen till varför man väljer VAV istället för CAV är att med CAV finns det ofta en stor risk att man överventilerar ett rum eller byggnad, just på grund av att flödet är konstant. Problemet med VAV är att det är en högre investeringskostnad än för CAV så metoden lämpar sig bara där energibesparingen är så stor så den täcker mellanskillnaden i pris.

The purpose of the study is to investigate the possible effects of an unstable ventilation system and its influence on energy use and thermal comfort. The report also explores how qualified personal working with HVAC view and handles system control.In order to meet the requirements in energy efficiency and a comfortable indoor climate control regulation is a prerequisite. With optimized increased complexity of the climate systems, it becomes more challenging to control the system and the risk of unstable control increases. No previous studies about what affect an unstable system can have on energy use and thermal comfort have been found.The report is based on several tests were the controlling variable has been increased until the system becomes unstable. Two different types of unstable systems have been investigated.

The purpose of the study is to investigate the possible effects of an unstable ventilation system and its influence on energy use and thermal comfort. The report also explores how qualified personal working with HVAC view and handles system control.In order to meet the requirements in energy efficiency and a comfortable indoor climate control regulation is a prerequisite. With optimized increased complexity of the climate systems, it becomes more challenging to control the system and the risk of unstable control increases. No previous studies about what affect an unstable system can have on energy use and thermal comfort have been found.The report is based on several tests were the controlling variable has been increased until the system becomes unstable. Two different types of unstable systems have been investigated.

The problem of separating a non-rectangular foreground image from a background image is a classical problem in image processing and analysis, known as matting or keying. A common example is a film frame where an actor is extracted from the background to later be placed on a different background. Compositing of these objects against a new background is one of the most common operations in the creation of visual effects. When the original background is of non-Constant color the matting becomes an under determined problem, for which a unique solution cannot be found. This thesis describes a framework for computing mattes from images with backgrounds of non-Constant color, using Bayesian statistics.

The system tungsten-oxygen has potential of being suitable for decorative coatings since ceramic coatings are often hard and wear resistant, and since modulations in oxygen content or incorporation of small ions could give bright colours. The aim of this report was to investigate the relationship between process parameters and  the properties of the films, with the wear resistance being of special interest.Samples with tungsten to oxygen ratios in the range of 100:0 to 25:75 at% were made using reactive sputter deposition, either with Constant gas flow, or gas flow controlled by optical emission of the plasma. The hysteresis of the system, which means that a certain gas flow will cause different pressure and/or target voltage depending on in what way the flow is reached, makes it interesting to control the process where the system makes the steep change from metallic tungsten to ceramic tungsten oxide. This is difficult and thus requires precise control equipment.The samples were analysed using X-ray diffraction, X-ray photoelectron spectroscopy and an empirical wear test suitable for small components like cell phone cover for example, in order to characterize the structure, composition and wear resistance of the coatings. The results could be divided into three groups: (I) tungsten-like, with very low oxygen content; (II) mixed phase and (III) tungsten oxide like, with oxygen content close to 75 at%.

Information technology and globalization has led to an increasing competition and service production has been more and more independent of locations. This has made a market of outsourced telephone costumer service possible. Due to high establishment the market has been saturated and with that price has sunk. Customer companies have the last few years got more negative to outsourcing of their telephone customer service as they through operating the customer service internally want to get closer to their customers.In the empirical study the writers try to figure out which companies the callcenters should try to aim towards to get long and profitable cooperation. This will be done through deducing guiding principles from theories about how different factors around companies costumer service should look like.

Light has always fascinated humans but ever since the invention of the first light bulb, the use of artificial lighting has accelerated dramatically. Darkness has never been as rare as today and the overuse of lighting has created a new phenomenon called light pollution. Most living beings are biologically dependent on the recurrent twenty-four-hour rhythm of light and darkness, called the circadian cycle. Human beings are evolutionary developed after this circadian rhythm and the effects of Constant artificial light is yet unknown. Scientists fear the consequences of Constant lighting and what it means physically, mentally and philosophically for the human species.

In order to survive Constant economic, environmental and political challenges, it has appeared to become increasingly important for a firm to recognize the significance of corporate governance. In this thesis, the structure of the board at Smartner Ltd will be outlined and the relationship between the board members and the CEO will be clarified. In addition, the aim is to analyze the corporate governance system at Smartner Ltd to be able to outline and clarify the distinct relationship between the CEO and board of directors..

Information technology and globalization has led to an increasing competition and service production has been more and more independent of locations. This has made a market of outsourced telephone costumer service possible. Due to high establishment the market has been saturated and with that price has sunk. Customer companies have the last few years got more negative to outsourcing of their telephone customer service as they through operating the customer service internally want to get closer to their customers.In the empirical study the writers try to figure out which companies the callcenters should try to aim towards to get long and profitable cooperation. This will be done through deducing guiding principles from theories about how different factors around companies costumer service should look like.

The aim of our study is to examine stepparents´experiences of their role in the new family, we also want to examine if the role as stepparent is affected to the role as a biological parent. Our study is based on six semi-structured interviews, with three stepmothers and three stepfathers.By using role theory and symbolic interactionism our results indicate the requirement of Constant negotiation as well as acknowledging the need to consider the other familymembers, those you may not have chosen to live with.We can see that the division of responsibility is governed by what is best for the family - to make life as easy as possible. It is clear that many stepparent lack guidance in what is expected of them in their new role; howeverr, they have been able to grow into it.  .

This bachelor essay is divided into two parts, the first being a construction of a single-familyhouse and the second an in-depth study of five different isolation materials, analysed from anenergy perspective.The first part, the construction of the single-family house, has been created from knowledgeacquired during three years of studying at KTH Royal institute of Technology in Stockholm, inthe program Architecture and the Built Environment. The constructed house is a one-floorhouse of 137m2with façade plaster, situated in Borlänge, Sweden. The house has a wooden framewhich is built on a on sight cast concrete foundation, on the ground. The house?s roof is a gableroof, which has an angle of 24 degrees.

Combustion of fossil fuels is today the dominating source of energy. During combustion,carbon dioxide is formed. The carbon dioxide accumulates in the atmosphere,which raises the global average temperature on earth through the so called greenhouseeffect. The only way to reduce the emissions of carbon dioxide from combustionin a coal fired power plant is through carbon capture and storage (CCS).Post-combustion capture is a technology to separate carbon dioxide from the uegas after the combustion for efficient transport and storage. The steady state operationof coal fired power plants with post combustion capture has already beenthoroughly investigated on a pilot scale, however much work remains to investigatethe plants dynamic operation.

This report is a specialization in Software defined networking. SDN really comes to revolutionize the industry and it?s under Constant development. But is the technology ready to be launched into operation yet? The report would initially involve a number of problems that today's network technology is facing.

The aim of the study was to find repetitive behavioral patterns pre calving that could be used as indications of calving in beef cattle. In the study sixteen Standing- and lying down sensors were attached to the leg of sixteen beef cows. Ten of the sixteen beef cows gave birth to calves during the trial period. From these ten cows, data from six cows were used to assess the sensors fitness for use as calving indicators. The analytical part of the experiment was divided into two parts, calculation of divergence of mean lying time within different time intervals, and the number of lying bouts.The first part consisted of optimization of an equation used to highlight divergence in mean lying time within eight different time intervals (3, 6, 9, 12, 15, 18, 21 and 24 hours).