Suspension systems and wheels play a critical role in vehicle dynamics performance of a car in areas such as ride comfort and handling. Lumped parameter models (LPMs) are commonly used for assessing the performance of vehicle suspension systems. However, there is a lack of clarity with regard to the relative capabilities of different LPM configurations. A comprehensive comparative study of three most commonly used LPMs of increasing complexity has been carried out in the current work. The study reported here has yielded insights into the capabilities of the considered LPMs in predicting response time histories which may be used for assessing ride comfort. A shortcoming of available suspension system models appears to be in representation of harsh situations such as jounce movement which cause full compression of springs leading to ‘jerks’ manifested as high values of rate of change of acceleration of sprung mass riding on a wheel. In the current research work, a modified nonlinear quarter-car model is proposed to account for the contact force that results in jerk-type response. The numerical solution algorithm is validated through the simulation of an impact test on a car McPherson strut in a Drop Weight Impact Testing Tower developed in CAR Laboratory, CPDM. This is followed by a detailed comparison of HCM and QCM to examine their suitability for such analysis. For decades, wheel bearings in vehicles have been designed using simplified analytical approaches based on Hertz contact theory and test data. In the present work, a hybrid approach has been developed for assessing the load bearing capacity of a wheel ball bearing set. According to this approach, the amplitude of dynamic wheel load can be obtained from a lumped parameter analysis of a suspension system, which can then be used for detailed static finite element analysis of a wheel bearing system. The finite element modelling approach has been validated by successfully predicting the load bearing capacity of an SKF ball bearing set for an acceptable fatigue life. For the first time, using a powerful commercial explicit finite element analysis tool, a detailed dynamic analysis has been carried of a deep groove ball bearing with a rotating inner race. The analysis has led to a consistent representation of complex motions consisting of rotations and revolutions of rolling elements, and generated insights into the stresses developed in the various components such as balls and races. In conclusion, a simple yet effective fuzzy logic-based yaw control algorithm has been presented in the current research. According to this algorithm, two inputs i.e. a yaw rate error and a driver steering angle are used for generating an output in the form of an additive steering angle which potentially can aid a driver in avoiding straying from an intended path.

A dissertação trata do estudo acerca dos direitos fundamentais do empregado, sob a ótica do direito fundamental à intimidade e à vida privada nas relações de emprego. Discute-se sobre a problemática gerada em torno do poder diretivo do empregador quando utiliza de métodos abusivos no controle da atividade laboral do empregado. Procura-se elucidar esses limites de controle, utilizando-se para tanto do direito comparado, da análise jurisprudencial e dos posicionamentos doutrinários. Em torno do tema proposto fala-se sobre o respeito e consideração ao princípio da dignidade da pessoa humana no trabalho, bem como da importância do princípio da proporcionalidade, sendo que neste último sugere-se sua possível aplicação nos casos em concreto, pelos intérpretes e aplicadores do direito na hipótese de haver colisão de direitos. Como parte exemplificativa do trabalho questiona-se a monitoração no âmbito das relações laborais e, aborda-se, também, a questão do teletrabalho. / Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-05-30T16:22:29Z No. of bitstreams: 1 Dissertacao Fernando Valduga.pdf: 341942 bytes, checksum: f85ad115f5dd64bc151574ec54934bde (MD5) / Made available in DSpace on 2014-05-30T16:22:29Z (GMT). No. of bitstreams: 1 Dissertacao Fernando Valduga.pdf: 341942 bytes, checksum: f85ad115f5dd64bc151574ec54934bde (MD5) / The dissertation deals with the study about fundamental rights of the employee, from the perspective of the fundamental right to intimacy and privacy in employment relations. It discusses on the problems generated around the power steering when the employer uses abusive methods to control the employee´s work activity. It seeks to elucidate these control limits, using for both comparative law, jurisprudence and the analysis of doctrinal positions. Around the proposed theme speaks out about respect and consideration to the principle of human dignity at work and the importance of the principle of proportionality, while the latter suggest their possible application in concrete cases, the interpreters and law enforcers in case of collision of rights there. As part of examples of work questions the monitoring in industrial relations, and one addresses also the issue of teleworking.

There has been a steady growth in the traffic generated by Mobile Network Operators (MNOs), and by 2020 it is expected to overload the existing licensed spectrum capacity and lead to the problem of scarce resources. One method to deal with this traffic overload is to access unlicensed and shared spectrum bands using an opportunistic approach. The use of Licensed Shared Access (LSA) is a novel approach for spectrum sharing between the incumbent user (i.e., the current owner of the shared spectrum) and the LSA licensee (i.e., the temporary user of frequencies, such as an MNO). The LSA system allows the incumbent users to temporarily provide the LSA licensee with access to its spectrum resources. However, licensees must adopt vertical handover and traffic steering procedures to vacate their customers from the LSA band without causing interference, whenever this is required by the incumbent. These procedures should be carried out, de facto, before the base station is turned off as a part of a rapid release of unscheduled LSA band facing evacuation scenarios. Thus, in this dissertation, a cognitive mechanism is proposed to make decisions in advance to find the best target network(s) for evacuated customers in connected mode and with active traffic per class of service. On the basis of these decisions, the vertical handover and traffic steering procedures are carried out for the best target network(s), which are selected in advance and undertaken immediately to avoid interference between the licensee and incumbent services. Furthermore, this guarantees the seamless connectivity and QoS of evacuated customers and their traffic respectively, during and after the unscheduled evacuation scenarios. A performance evaluation conducted in a simulating scenario consisting of one LTE-LSA and three Wi-Fi networks, demonstrated that the proposed solution could be completed within the time required for the unscheduled evacuation, as well as, being able to ensure the QoS and seamless connectivity of the evacuees. The total execution time obtained during the performance evaluation of the proposed solution was around 46% faster than of two related works and could thus avoid interference between the licensee and incumbent services.

This study describes the Swedish Government's public management of the Swedish Police Authority. It also illustrates some of the Government's political promises towards the Police Authority. The reason for making this study is the situation of escalating shootings in the society and reports about a crisis in the Police Authority. Therefore is the purpose of the study to find out if there are any changes in the Government's public management of the police during the 2014-2018 term of office in relation to this situation. The method is a review of state budgets, appropriation directions, regulations, government bills and other acts which are compared with theories of public management. The results shows that the greatest change this far happened late in the term of office when the Swedish Police Authority received an increased appropriation. The Swedish Police Authority also received new government mandates with the purpose to solve specific problems within the police authority. In relation to theories of public management, the Swedish Government's management of the police focuses on the indirect types of management to reach results within the direct management of laws and regulations.

The aim and scope of this study is to describe the coordination of joint efforts concerning chemicals and hazardous substances in the Baltic Sea region, between the Swedish Chemicals Agency (KemI) and the land-based pollution group of the Helsinki Commission (HELCOM LAND). Based on the description of the coordination, the second aim is to discuss the consequences for the Swedish Chemicals Agency in its policy shaping work towards a nontoxic environment. A qualitative and descriptive case study method is used for this purpose. Theories of coordination and achievement-inducing criteria for environmental goals are applied to the case. Components and related processes of coordination are applied to the descriptive part of the study, whilst the achievement-inducing criteria are applied in the discussion. The description of the coordination unveils a strong coordination regarding goal selection, goal decomposition and mapping activities to actors. It also confirms an interdependency between the two organisations, based on the fact that they have different institutional leverage, and thus addresses different types of actors. The result of the study shows that the coordination consequences do not lead to an independent Swedish chemicals policy. Due to limited data, the certainty of the conclusions based on the theoretical and empirical evidence found in this study can be discussed, and must therefore be subject to more empirical research.

Denna studie handlar om styrning och ledning i Karlstad kommun. Studien syftar till att undersöka hur New Public Management och Tillitsbaserad styrning och ledning kan bidra till en förståelse för den centralt kommunicerade styrningen och ledningen. Den övergripande problemställningen som besvaras i studien är Vilka dominerande inslag av Tillitsbaserad styrning och ledning samt New Public Management återfinns i den centralt kommunicerade styrningen och ledningen av Karlstads kommun? Frågeställningen besvaras med en idéanalys. Två styrningstrender används som idealtyper för att utforska det empiriska materialet som består av styrdokument och intervjuer med tjänstemän inom kommunledningen. De två trender som utgör teoretisk grund är New Public Management och Tillitsbaserad styrning och ledning. Studiens relevans ligger i den svenska regeringens pågående arbete med att förändra hela styrkedjan inom den offentliga sektorn, från New Public management till Tillitsbaserad styrning och ledning. Den övergripande problembilden baseras på antagandet att vissa centrala delar i New Public Management har lett till en oproportionerlig ökning av administrativa arbetsuppgifter, vilket i slutändan lett till en ineffektiv användning av de offentliga resurserna. Genom att undersöka befintlig styrning och ledning i en svensk kommun idag får vi en bättre nulägesbild av vilka områden som, mer eller mindre uttryckligen, präglas av de två trenderna. Således kan de båda trenderna sägas representera det gamla och det nya då regeringens ambition är att ersätta delar av den ena med den andra. Resultatet av studien visar att genom att se på olika områden är det möjligt att lokalisera element från de två trenderna i varierande utsträckning. De båda trenderna var för sig är dock inte tillräckliga för att skapa sig en rättvis bild av den centrala styrningen och ledningen i Karlstad kommun. Tillsammans bildar de vad som bäst beskrivas som en hybridmodell. / This paper is about governance and management in the municipality of Karlstad. The study aims to explore how New Public Management and Trust based governance and management can contribute to an understanding of the centrally communicated governance and management. The main question that is to be answered in this paper is What dominant elements of Trust based governance and management as well as New Public Management can be found in the centrally communicated governance and management of the municipality of Karlstad? The question is answered by an idea analysis. Two management trends are being used to explore the empirical material that consists of steering documents and interviews with representatives of the municipal management. The two trends that are used as theoretical base and ideal types for this study are New Public Management and Trust based governance and management. The relevance of the study lies in the fact that the Swedish government has a work in progress on changing the course of the governance throughout the public sector, from New Public Management to Trust based governance and leadership. The overall problem scenario is based on the assumption that some of the central elements of New Public Management has led to an disproportionate increase in administration, which in the end has led to a non- efficient usage of the public resources. By examining the existing governance and management in a Swedish municipality today we get a better situation image of which areas that are, more or less explicitly stated, characterized by the two trends. Thus both trends can be said to represent the old and the new as the government's ambition is to replace parts of one with the other. The result of the study shows that by looking at different areas you are able to locate the two trends in varying extent. The trends by themselves are not enough to get a clear image of the governance and management in Karlstad, yet together they form what is best described as a hybrid model.

Les antennes à pointage électronique présentent des avantages significatifs dans les systèmes de communication sans fil. Malgré cela elles ne sont toujours pas implantées dans l'industrie automobile. En effet, l'espace limité et le toit en grande partie métallique freinent l’utilisation de ces aériens dans ce contexte contraint. De nombreux défis restent à relever pour concevoir un système efficace, peu encombrant, faible coût et permettant de rayonner sur 360°. L’objectif de cette thèse est donc la mise au point d’une antenne à balayage électronique pour application automobile fonctionnant dans la bande LTE. Un système de «type MIMO » est proposé. Une antenne à résonateur diélectrique efficace, multi-bandes et efficace est conçue selon une procédure de développement spécifique. Un déphaseur accordable est également mis au point et réalisé. Il utilise des commutateurs et un condensateur variable. Un déphasage de 360 degrés est obtenu, le dispositif est commandé électriquement. L’antenne et le déphaseur sont ensuite associés dans un système complet fonctionnant dans la bande LTE. Celui-ci utilise deux antennes identiques, une seule étant alimentée. Ce système complet est mesuré seul et sur le véhicule. Les résultats obtenus sont prometteurs et permettent d’envisager, moyennant quelques améliorations, une exploitation industrielle. Les études menées pour aboutir à ce dispositif sont détaillées dans le manuscrit. / Even though beam steering technology has significant advantages in wireless communication systems, it is still not implemented in the automotive industry. Indeed, the limited space and the large metal sheet on the rooftop are the challenges for such system. This thesis is focused on the design of the LTE beam steering antenna based on a MIMO system for an automotive environment. An appropriate multiband, efficient and compact Dielectric Resonator Antenna is conceived using a specific development procedure. Also, a tunable phase shifter is designed and realized with switches and a variable capacitor. It has 360 degrees phase shift and can be electrically controlled. The proposed DRA and phase shifter are integrated in a global antenna system for automotive application in the LTE band. We finally propose a MIMO system with an active beam steering radiation pattern. It is very compact and can be implemented on the vehicle rooftop. Using the proposed phase shifter, a beam steering antenna is obtained with a global coverage close to 360� for the antenna alone or on the vehicle. Measurements are made in the using context of the antenna. Finally, the developed system is, with some improvement, powerful for powerful enough for "commercial" automotive applications. The studies carried out to develop this antenna are detailed in this manuscript.

A dissertação trata do estudo acerca dos direitos fundamentais do empregado, sob a ótica do direito fundamental à intimidade e à vida privada nas relações de emprego. Discute-se sobre a problemática gerada em torno do poder diretivo do empregador quando utiliza de métodos abusivos no controle da atividade laboral do empregado. Procura-se elucidar esses limites de controle, utilizando-se para tanto do direito comparado, da análise jurisprudencial e dos posicionamentos doutrinários. Em torno do tema proposto fala-se sobre o respeito e consideração ao princípio da dignidade da pessoa humana no trabalho, bem como da importância do princípio da proporcionalidade, sendo que neste último sugere-se sua possível aplicação nos casos em concreto, pelos intérpretes e aplicadores do direito na hipótese de haver colisão de direitos. Como parte exemplificativa do trabalho questiona-se a monitoração no âmbito das relações laborais e, aborda-se, também, a questão do teletrabalho. / The dissertation deals with the study about fundamental rights of the employee, from the perspective of the fundamental right to intimacy and privacy in employment relations. It discusses on the problems generated around the power steering when the employer uses abusive methods to control the employee´s work activity. It seeks to elucidate these control limits, using for both comparative law, jurisprudence and the analysis of doctrinal positions. Around the proposed theme speaks out about respect and consideration to the principle of human dignity at work and the importance of the principle of proportionality, while the latter suggest their possible application in concrete cases, the interpreters and law enforcers in case of collision of rights there. As part of examples of work questions the monitoring in industrial relations, and one addresses also the issue of teleworking.

The diploma thesis is focused on design of electrohydraulic system for nose gear control on small civil airliners. First part consists of brief review of small civil airliners, nose gears and CS 23 restrictions relevant for the design. In practical part a typical small civil airliner is defined and kinematic of landing gear mechanisms is designed. Then the electrohydraulic system itself is designed and parameters of some components are suggested. The wheel steering mechanism is simulated and, in conclusion, the whole system is evaluated.

This diploma thesis is focused on the design of the conversion of the car front suspension for racing purpose. Existing suspension solution is described by analyse static and kinematic quantities. Furthermore, a change of suspension is proposed to improve the driving characteristics of the vehicle, where the kinematic, dynamic and strength analysis of the newly designed suspension is performed. The conclusion summarizes the comparison of the original and the new suspension design.