In this study, the pre-tension force in an insert screw connection are examined in order to establish a greater understanding of the system and to facilitate the process of making new metal cutting tools. Certain especially significant design variables such as the offset, the length of the contact thread and the shank length above the threaded hole, are selected to be closely examined. A comparison of the influence on the pre-tension force between threaded holes made with a worn, versus new, threading tool is also involved in the experiment. The study is limited to handling the screw sizes M2,5 and M3,5. The results show that a regression model, with good approximation, can be fitted to the measured values.

In this thesis a possible cost effective runner change of some of the units in the hydroelectric power station Olidan is investigated. The possibility to drive a unit at the same efficiency point through a change of the turbine shaft speed and the rate of discharge is tested. Furthermore the theories behind model testing, determination of efficiency increase from model to prototype and efficiency measurements shall be discussed and analyzed with Olidan as a starting point.A predicted curve has been built on information from model tests and field measurements on the existing runners and runner data from the test of the new model. The predicted curve shows the difference in efficiency between an existing runner and a modern one. It is the difference in efficiency that is used in the calculations that are to show whether changing to a pair of new runners will be cost effective or not.

The purpose with this masters thesis was to model the scanner in a system for laser bathymetry. The model was then used to develop a controller for the scanner so a good search pattern was achieved. Two different types of models have been tested, a physical model and a Black Box model of Box Jenkins type. The physical model has been derived from Lagranges equations. Identification experiments have been used to compute the Black Box model and to find the unknown parameters in the physical model.

Pulsatilla vernalis is one of several endangered plant species that benefit from wildfires and small scale disturbance events that repel competing vegetation and create open patches in the vegetation cover. Previous studies argue that Pulsatilla vernalis is decreasing in numbers due to vegetation changes associated with the decrease in wildfires, forest grazing and changes in forest management. In this study, 17 populations of P. vernalis were inventoried in order to examine if soil and/or vegetation structures affect the population structure of P. vernalis (i.e.

The purpose of my study was to find out how staff in after-school activities thinks they work with norms and values, we may call this values education, and how this in turn may influence children's norms and values. By extension, how children are socialized with each other and develop socially. In my research, I have interviewed five of the after-school activities staff who work with children aged 6-9 years at a school in the neighbourhood Rinkeby-Kista in northwestern Stockholm.The results show that after-school activity according to the staff can play a very important and sometimes crucial role in children's social development. Staff believes that if they do not learn the social rules by participating in playing and games in early childhood, when growing up they are outside and cannot participate. By their pedagogical approaches, in terms of values and norms, the adults in after-school activities can help children to become socialized into a community of solidarity and eventually as adults become responsible citizens able to function and participate in society..

In recent years it has become way more important for organizations to use their brand to market themselves as an employer. In a market where organizations are competing for labor it has been known that the brand can make it possible for organizations to differentiate themselves as unique and attractive place of work. The concept is called Employer Branding and if an organization wants to suceed they have to have a clear and defined structure. The concept is well known among private organizations and not as common with the public sector. The purpose of this study was to examine how a small municipality in northern Sweden is working to be an attractive employer.

There are several competing views on how to best utilize air power. Following his quantitative study of air power, Robert Pape developed a theory which focuses on undermining the target state's military strategy. According to Pape it is possible to explain the outcome as a result of military vulnerability. This essay seeks to determine if Pape's theory can predict the outcome of Operation Unified Protector. By using a mixed methods approach on four hypotheses, it will be determined if the operation was a successful case of coercion, if NATO acted according to Pape's model and whether this achieved the desired effects or not. The results reveal that the theory could not successfully predict the outcome of the conflict.

There is a great need to reduce nutrient leaching from arable land into lakes and oceans. By using several different types of models it has previously been possible to describe nutrient losses in a catchment area with a minimum unit of sub-catchment level. At present, it is instead desirable to model a smaller catchment with an opportunity to re-connect the results to the corresponding fields in the catchment. Such models already exist but they are not fully able to properly describe Swedish conditions and land characteristics in our region.With the approach of creating such a model, SLU has developed a project with this work as its first stage. The model is expected to be created under the working name SWE-model which stands for Soil Water Environment and is in this first stage supposed to apply the SOIL model in catchment scale. During the procedure to describe the first step in the process of developing such a model adapted to Swedish conditions and which works in the catchment scale with an area of about 10-30 km2, focus has been set on calculating the transport of water flow from different hydrological response units. Regardless of the processes occurring in the soil after the water has been added, it is assumed that all the water which flows from each simulated unit is drained.In the first step the hydrologic response units were identified based on land use and soil type in the study area. With the help of a script with functions that retrieve and transform data, certain units were chosen for simulation. The script was also created in this project. Finally, the model results were aggregated and summarized for each unique unit, for each sub-catchment, and also for the whole catchment.From the results it is possible to see similarities in the flow dynamics between modeled and measured data. The efficiency coefficient has been calculated to correspond to the mean of the measured values for the whole simulation period. With an automated calibration process the model should be able to perform better. The volume error gives an indication of overestimation from the model..

The aim of this thesis is to illustrate the content of the democratic values tolerance, personal development and political equality, in relation to the Swedish school?s systems fundamental values, and from there problematize the schools approach towards the Sweden Democrats. By using a qualitative text analysis upon the party program of Sweden Democrats, we have been able to fulfill the aim of the thesis. We have motivated and defined our chosen democracy values from the schools fundamental values and from democracy theory. With the use of an analyze schedule we have been able to go through with the interpretation and analyze of the party program of the Sweden Democrats.

There are several competing views on how to best utilize air power. Following his quantitative study of air power, Robert Pape developed a theory which focuses on undermining the target state's military strategy. According to Pape it is possible to explain the outcome as a result of military vulnerability. This essay seeks to determine if Pape's theory can predict the outcome of Operation Unified Protector. By using a mixed methods approach on four hypotheses, it will be determined if the operation was a successful case of coercion, if NATO acted according to Pape's model and whether this achieved the desired effects or not. The results reveal that the theory could not successfully predict the outcome of the conflict.

Topography is an important parameter for catchment hydrology, since it is a driver for water flow. Moreover, topography serves as a basis for hydrological models, e.g. ?Top-model?, which is based on a topographical wetness index (TWI). Few studies of TWI have been conducted on agricultural catchment scale. Four fields were studied in a Swedish drained agricultural catchment in order to evaluate the influence of topography on soil wetness.

The main purpose of a Flight Data Recorder (FDR) is to facilitate the investigation of incidents. In order to interpret the data that has been recorded in the FDR the data has to be visualized in some way. This can be done with software on a computer or with hardware that is specific for the model of aircraft that the data originates from.The aim of this project is to visualize data for six parameters from the FDR of Saab 2000 in an avionics rig. The avionics rig resembles the cockpit of Saab 2000 and the displays in it are identical to the ones found in the plane. All six parameters are shown on the same display.Due to safety regulation vital systems in aircraft are doubled, with one system on the left side and one on the right.

During the past decades the competition for skilful employees has increased and companies and organizations compete to attract the right people. The Swedish municipalities and country councils need to recruit 420 000 new employees before 2020, but have a limited budget to promote themselves as attractive employers. To find a solution, many of the municipalities have started to work with fundamental values to become more attractive employers and to inspire employees to use word-of-mouth to recommend them. There are no empirical studies of how successful this strategy is, and the purpose of this thesis is to show if there are significant correlations between the fundamental values, the employer's attractiveness and word-of-mouth. The results of the study are based on a survey with 1996 answers from employees in three different municipalities in Stockholm, Sweden.

The objective with the study was to evaluate what key persons at LFV Group (Luftfartsverket) think about-presented core values and their implementation within the company. Another objective of the study was to describe and compare the process of implementation of core values and how this affects organization culture at two selected reference companies. A qualitative method was applied in the form of semi-structured interviews with key persons at Luftfartsverket and the other reference companies.As the result a four-step program is proposed to describe the implementation process of core values: presentation, introduction, realization and follow-up. Within the implementation process it is possible to distinguish another process, which is based on core values, - introduction of new employees. The implementation of core values has contributed towards the development of the organizational culture as well as creating a successful company governed by core values..

Evaporation is a part of the chemical recovery department at wood pulping mills. The purpose of evaporation is to remove water from the black liquor, which makes the liquor combustible. The process is very energy demanding, and having a well-functioning model of the system is of greatest interest. The model can then be used to study energy consumption and to test different control strategies. Two models have been developed during the master thesis.