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1668 Uppsatser om Automatic snow depth measurements - Sida 42 av 112
Mätning av partikelmassa i avgaser från en dieselmotor
This master thesis was a continuation of a previous study in the diesel exhaust characterization, which is part of the academical work embedded in the EMIR-1 project. The main objective of this thesis work was to finish the installation and make the proper modifications of the particulate mass measuring system located in one of the engine test cells at KTH, in order to be able to measure the mass of the particles from the exhaust of diesel engines.This experiment requires a diluted flow sample from the exhaust that should be sent to the device that makes possible the measurement of particle mass, called TEOM. In the first stage of this project, the objective was to study and make the proper modifications in the existing KTH diluter because there were several problems to obtain a constant dilution ratio from it during tests.This modifications were made and it resulted in a great improvement in the maximum inlet and outlet flow that this diluter can handle. Therefore another modification is proposed for controlling the inlet exhaust flow so it will be possible to regulate the dilution ratio and make it constant along a wide range of engine loads and speeds.The second and most important stage was to make particulate mass measurements possible by analyzing the frequency signal from the TEOM device. The idea was to obtain the frequency of oscillation from the tapered element in the TEOM, and therefore with the proper correlations, be able to predict the particulate mass concentration in the exhaust flow from the engine.An electrical problem in the TEOM circuit was detected and corrected, so the signal that carries the frequency from the TEOM can be analyzed properly.
Implementation av ett interface till Emotiv Epoc
The eld of Brain-computer interfaces (BCI) concerns linking together an external device with the brain of a human or an animal. By doing this the conventional use of a mouse or keyboard can be circumvented, which can greatly benefit people with different types of diseases that cause paralysis or other loss of motor control, such as Amyotrophic lateral sclerosis (ALS). A BCI can also be used for cognitive training of either healthy or mentally impaired subjects to increase cognitive capabilities.In this thesis an implementation of an interface is made against such a device, the Emotiv EPOC Headset. The result is meant to be a stable basis for further study using the device. An in-depth study of the history of EEG and its current use in clinical work and research in the topics of BCI as well as Human-computer interaction (HCI) is presented.
Modellbygge av mekaniksystem och riktmotorer i stridsvagn 122
This master thesis is one part of a project, called ?StabSim?, with the purpose to develop a simulation model for the align and stabilisation system in main battle tank 122. The origin of this project is that it should be possible to make control analysis without risking any hardware. Besides that it will be easy to change components in order to investigate the behaviour of the system. The report includes modelling of tower and weapon mechanics and also the modelling of the synchronous motors, which control these.
Fejans vandrarhem ? En studie om isolering och uppvärmningsalternativ
During the last decennium climate issues have become more and more important. Many steps towards an adaption of efficient energy supply systems have been taken all around the world. These steps have been created to ensure the next generation?s energy demand. In EU and Sweden objectives have been set to ensure that the energy consumption decreases by 20% year 2020 and by 50% year 2050 compared with the energy consumption levels of year 1995.
Termisk värmelagring i kontorsbyggnader
This report has a dual focus. The first goal was to increase the knowledge of how the use of electricity in a residential building is distributed. Electricity in residential buildings is used for lighting in common areas, elevators, pumps and many other appliances. The electricity used for these different parts is to a great extent unknown. A few studies have been carried out and the result of these is referred to in this report.By means of measurements and approximations the use of electricity for various appliances became known.
Styrelsesammansättning i förändring - ett könsperspektiv
The absence of female directors on Swedish corporate boards is currently a hot topic for both politicians and business leaders all over the world. This thesis aims to discuss reasons for the scarcity of women on boards in Swedish publicly listed companies as well as what actions are taken to alter the composition of these boards. A rigorous selection of gender theories have been used together with data collected from in-depth interviews with mainly board members and nomination committees. Extensive analysis has led to findings that historical perceptions of differences between men and women linger as of today, which prevents women to reach top executive levels as well as board positions. The increasing use of headhunters has encouraged companies to look beyond male-dominated networks in an attempt to widen the range of potential board nominees.
ASB lika med SAB? En jämförelse av dokumenttitlar i de båda klassifikationssystemen.
The purpose of this Masters thesis is to compare the scheme structure of two national classifications system, namely the Swedish SAB system and the German ASB. It has been assumed that there are no major differences between the two models of classification systems or the main classes into which documents are placed. The classification theory and subject analysis, which form the basic theory on which my research is based, are taken from Dahlberg, Langridge and Rowley. A comparison of 30 monographs classified in the SAB system Sveriges allmänna biblioteksförening and in the German ASB system Allgemeine Systematik für öffentliche Bibliotheken showed that the classification structure was primarily responsible for determining where a particular document was placed. However, despite the fact that the subject in various documents may be similar, my research will demonstrate that the structure of the two codes also depends on different interpretations of the main subject in a document.
Ett flervariabelt feldetekteringssystem för övervakning av bärlagertemperaturen i vattenkraftturbiner
The purpose of this thesis work was to develop an automatic fault detection system for surveillance of bearing temperature in hydropower turbines. The parameters used except the bearing temperature were cooling water temperature and cooling water flow. A simple static model based on data sampled every minute was developed to estimate the bearing temperature. Then a detector for detection of change in bearing temperature based on the CUSUM-algorithm was designed. Since the amount of data was very small the developed model was too uncertain to be used in a working system.The designed fault detection system showed to work well for the available data.
Realtidsoperativsystem på mätinstrument
Emwiro Vibe is a complete system for seismic measurements. The functionality of the system was before the completion of this project handled using a software contruction based on a state machine. Emwitech, the company developing Emwiro Vibe, expressed a desire to replace this solution with a real-time operating system (RTOS). The project consisted of two parts. Firstly the existing software was studied, available RTOSes was evaluated, and the RTOS most suitable for the application was selected.
Realtidsoperativsystem på mätinstrument.
Emwiro Vibe is a complete system for seismic measurements. The functionality of the system was before the completion of this project handled using a software contruction based on a state machine. Emwitech, the company developing Emwiro Vibe, expressed a desire to replace this solution with a real-time operating system (RTOS). The project consisted of two parts. Firstly the existing software was studied, available RTOSes was evaluated, and the RTOS most suitable for the application was selected.
Äldreomsorgen och de sju små doktrinerna: En empirisk studie av New Public Management-reformer inom svensk äldreomsorg
The purpose of this paper is to perform an in-depth analysis of how New Public Management reforms have impacted management practises in two publicly financed elderly care providers in Sweden. The paper studies one public and one private elderly care provider and analyses to what extent they have implemented New Public Management methods. The results are based on interviews with several persons within the two organisations and analysed using the seven New Public Management doctrines as described by Christopher Hood (1991; 1995). The major finding in the thesis is that the level of exposure towards New Public Management reforms differs between the two studied organisations where the private provider is exposed to the reforms to a greater extent than the public. The paper concludes that the main reasons for the low extent of exposure in the public provider could be attributed to the lack of measurable standards performance as well as the proximity to the political leadership..
Perianestetisk omvårdnad av häst :
This work is a combination of a literature study and a practical pilotstudy. In the literature study essential physiological reasons of why anaesthesia of horses is so risky are explained. Diffrent methods of induction and recovery are brought up, together with significant aspects of positioning the horse on the operating table and perianaesthetic complications such as myopathy, neuropathy and limb fractures.
The pilotstudy had the purpose of examine the bodytemperature of horses undergoing general anaesthesia and to control the perianaesthetic temperature measurements performed in Swedish horseclinics and veterinary hospitals. Our hypothesis was that the bodytemperature of the horses would decrease but not enough to cause a problem.
The purpose of this work has been to gather more profound knowledges in the subject of perianaesthetic nursing of horses which is an important part of the assignment of a veterinary nurse..
Varumärkesimage ? utanför företagets kontroll
Companies spend huge amounts on communicating their brand through marketing. Many of these contact areas where the consumer comes in contact with the brand is con-trolled by the company. The brand image is also affected from outside the company. It can be from users, media, blogs etc.Burberry is an example of a company that got in trouble with their brand image after hooligans where associated with their products. If a company with a brand with a strong image is associated whith consumers that are not compatible with the target group the company wants, there is a risk of a negative affect on the brand image.Our purpose is to investigate and describe the phenomenom when a company brandimage is affected by being associated whith consumers not compatable whith, by the company, intended target group.We have chosen a qualitative research where we use a multiple case study.
Om värld och bevakning : en studie av en företagslednings omvärldsbild och dess samband med omvärldsbevakningen
Background: Increasing globalization makes companies more influenced than before by actors and factors in their environment. For some this has lead to a more dynamic and complicated business context. Therefore it is of strategic importance to understand what is currently going on as well as to have a general idea of what the future brings. Purpose: To contribute to a deeper understanding of how a corporate management can perceive its business environment and how it affects he gathering of business information from a strategic perspective. Realisation: In-depth interviews were conducted with all four members of the management in the studied company, Volvo Competence Center in Skovde, Sweden.
Svenska institutionella investerares uppfattning om icke-revisionstjänsters påverkan på revisorns oberoende
This study is a semi-structured, qualitative depth-interview study investigating Swedish institutional investors' perception of the fact that companies purchase non-audit services from its signing auditor and if they see this as a threat to auditor independence. The study focuses on independence in appearance rather than independence in fact. The study is based on the current media debate on auditor independence and aims to provide a deeper insight to enlighten legislators how users of audited financial information look at the problem. The study builds on agency theory's notion that there is an information asymmetry between management and shareholders, which the auditor is to reduce. The results show that Swedish institutional investors perceive that there is a threat to auditor independence when companies buy non-audit services from its signing auditor.