Thesis discusses bearings failure detection that is manifesting with increased levels of vibration and acoustic emission. The first part of my work gives introduction to common disorders arising on bearings during operation and negative effects on the bearing condition. Further the thesis makes the reader familiar with the terms of vibration and acoustic emission. The work includes a description of available methods for signal evaluation of vibration and acoustic emissions in order to diagnose the state of the bearings in the domains of time and frequency. In the practical part is explained the vibrodiagnostic concept with focus on bearing endurance test. Part of this practical test is a balance sheet for hardware with marginal parametres and a software description. The work is complemented with sorted database of processed topics from the magazine Orbit Bentley Nevada.

In my Master´s thesis I am concerned with the questions of the human factor in air traffic control. The work is mainly focused on the air traffic controller and discusses the influences that directly or indirectly affect the air traffic controller. Considerable attention is paid to the errors that may occur during the management, their analysis and proposals for their elimination, respectively their complete disposal. The main idea is to understand the thinking of the air traffic controller as the human element in an organization and applying theories to reduce the errors in the air traffic control.

This thesis deals with mechanical and fatigue properties of magnesium alloy AZ91 processed by EX-ECAP method. This method involves the application of extrusion followed by equal-channel angular pressing. To obtain basic mechanical characteristics, the tensile test were carried out at room and elevated temperatures. Further the fatigue tests were performed and obtained data were used to compile S-N curve. The work also includes metallographics analysis of microstructure and fractographic analysis of fracture surfaces of tensile and fatigue test specimens.

Fatigue analysis is a critical stage in the design of any structural component. Typically fatigue is analysed during post-processing, but as the size of the analysed component increases, the amount of data stored for the analysis increases simultaneously. This increases the computational and memory requirements of the system, intensifying the work load on the engineer. A continuum mechanics approach namely ’Continuous time fatigue model’, for fatigue analysis is available in a prior study which reduces the computational requirements by simultaneously computing fatigue along with the stress. This model implements a moving endurance surface in the stress space along with the damage evolution equation to compute high-cycle fatigue. In this thesis the continuous time fatigue model is compared with conventional model (ie.Cycle counting) to study its feasibility. The thesis also aims to investigate the continuous time fatigue model and an evolved version of the model is developed for non-proportional load cases to identify its limitations and benefits.

In this dissertation, I examine the temporal and material connections between component parts of hybrid artworks, specifically between live events / acts of performance and the long-lasting sculptural elements that those events / performances produce. I propose a re-orientation of the temporal gaze of performance art history, from one oriented to the past to one focused on the continually unfolding present. Such a re-orientation requires a nonlinear approach to art making that complicates set boundaries of past and present, liveness and record, and presence and absence, and disrupts in potentially corrective ways our historically normative systems of looking, categorizing, and archiving art. Through a transfeminist analysis that prioritizes multiplicity rather than categorization, I consider elements of liveness in relation to subjectivity and agency, paying attention to their effect on the works’ ongoing reception and classification in archiving systems. I examine three elements of liveness as maintained through indexicality: action, endurance, and presence. Each of these elements has been historically associated with live art but not with static objects; each has been considered only in the past tense after the initial performance has ended. Using definitions of indexicality, nonlinearity, and agency as starting points, I examine how performance-based artworks connect the performance and subjectivity of the artist across time. This project loosely takes the form of three case studies of hybrid art practices by contemporary artists: Kate Gilmore, Mary Coble, and Cassils.

Title: Youth Sports Preparation Issues Objectives: The objective of the diploma thesis is to find out the intervention programme effectiveness using specific and semi-specific character exercises in relation to the enhancement of fitness training pre-conditions of the young football players belonging to the U 16 category. Methods: A group of players, who were subjected to testing, consisted of 12 players of younger junior category at the age of 16 years (year of birth 1997) who are playing younger junior league. This group was involved in a two-month process of intervention. The exercises were applied every day in both months during the main contest period. Before joining the intervention, players were subjected to entry tests, then, a two-month training cycle began. After that, the players underwent final tests which were exactly the same as the entry tests. Results: The section of the diploma thesis bringing tangible results involves their evaluation which is available in the submitted protocols. Final results are presented in a well arrange way in the form of charts and graphs followed by their evaluation. Conclusion: Direct influence on the speed and coordination abilities using specific and semi- specific exercises is an important constituent part of training units in any football match namely because...

The aim of this work was to find a correlation between the electrical, optical and microstructural properties of thin SiO2 layers containing group IV nanostructures produced by ion beam synthesis. The investigations were focused on two main topics: The electrical properties of Ge- and Si-rich oxide layers were studied in order to check their suitability for non-volatile memory applications. Secondly, photo- and electroluminescence (PL and EL) results of Ge-, Si/C- and Sn-rich SiO2 layers were compared to electrical properties to get a better understanding of the luminescence mechanism.

Extreme obstacle racing is a brand new sporting industry that is currently developing most not only in Europe but also around the world. I focused mainly on introducing this new sport in order to find out different level of the motor skills of beginners and professionals. In the theoretical part of my work, I defined what is characteristic for this sport and why it is so famous and wanted today. In the practical part, using the proposed test battery, I tested all the motor skills of beginners and professionals in order to identify the real physical differences between them. As a result of these facts, methods of testing, observation, processing, evaluation, analysis and statistics of data, along with the study of professional literature, were used. Based on the established hypotheses, I asked questions that I had in my opinions and attitudes to the beginners and professionals of this thriving sport. Through research and testing, we have found that professionals are certainly more dominant in motor skills than beginners with overall predominance in all underlying motor tests that included speed, endurance, strength and coordination tests. The benefit of this work is the analysis and introduction of a new sporting industry, including the main discovery of real differences between beginners and...

I näringslivet nyttjas dagligen sprängämnen för att uträtta sprängarbeten främst inom bygg- och gruvbranschen. Dessa sprängämnen tillverkas i och utanför Sverige. I samhället finns det åtskilliga aktörer som nyttjar stora volymer utav sprängämnen. Vid en konflikt på svenskt territorium finns det alltså en möjlighet att tillföra sprängämnen som nyttjas i näringslivet till de militära förbanden. Studien syftar till att beskriva hur förmågan att förstöra objekt skulle öka om civila sprängämnen kunde nyttjas av militära förband. För att påvisa detta måste civila sprängämnen värderas i militära kontexter.  För att beskriva hur väl de civila sprängämnena skulle kunna öka de stridande förbandens förmåga till förstöring genomfördes en undersökning av sju civila sprängämnen samt en värdering av dessa utifrån militära krav. Dessa sprängämnen jämfördes sedan med sprängdeg för att på ett tydligt sätt beskriva hur väl de olika sprängämnena uppfyllde kraven. Slutligen diskuterades resultaten utifrån grundförmågorna verkan, uthållighet och tillgänglighet. Resultaten visar att tack vare det breda utbudet av civila produkter kan de flesta militära sprängarbeten utföras med civila sprängämnen, om rätt sprängämne nyttjas till rätt objekt. Över lag passar civila sprängämnen bäst till inneslutna laddningar på grund av den höga relativ arbetsförmåga.  För att öka förmågan till förstöring måste verkan säkerställas genom praktiska prov. Tillgängligheten måste säkerställas genom utbildning för militär personal samt krigsplanering av sprängämnen. Uthålligheten ökar genom att de militära förbanden kan ersätta förbrukade sprängämnen. När förbanden får tillgång till mer sprängämnen kan de lösa fler uppgifter och förmågan till förstöring ökar. / Explosives are used daily in business by construction sites and mines. These explosives are made both in and outside of Sweden. In the society, there are several actors who deal in large quantities explosives. In a conflict on Swedish territory, there are accordingly a possibility to add commercial explosives to the armed forces.  The aim of this study is there for to describe how the ability to demolish objectives will increase if the armed forces where to use commercial explosives. To demonstrate this the commercial explosives must be rated in a military context.  To describe how well the use of commercial explosives will increase the ability to demolish, survey was implemented where seven different commercial explosives from the Swedish market were rated by military requirements. These explosives where then compared with blasting dough to, in a distinct way, describe how well the commercial explosives preformed. Lastly the results were discussed in terms of the military abilities effect, endurance and availability.  The results shows that thanks to the great deal of different explosives that the market provides, most of the military tasks can use commercial explosives if the right explosive is used for the right task. Overall, the commercial explosives are best suited for enclosed charges due to its ability to throw away masses.  To increase the ability to demolish, the effect must be proven by practical tests. The availability must be ensured through education for military personal and war plans for commercial explosives. Endurance increases by the replacement of consumed explosives to the military units. When the units can use more explosives, they can complete more tasks and the ability to demolish increases.

La douleur est une sensation universelle pour qui les termes descriptifs élicitent une reconnaissance immédiate. Les sensations de brûlure, de démangeaisons ou de tranchements aigus servent de signal d’alarme ayant pour but d’éviter des dommages corporels. Chez les athlètes, cette alerte est souvent ignorée afin d’atteindre l’excellence en performance. Dépendant du sport, le type de douleur ressenti peut varier. Dans le cas des athlètes d’endurance, la douleur survient naturellement dans le muscle due aux contractions répétées sur une longue période. Alternativement, les athlètes pratiquant un sport de contact doivent aussi anticiper de la douleur « mécanique » produite par des coups infligés par les adversaires. La différence dans la demande et la spécificité de chaque sport sont cependant rarement prises en considération dans les études sur la douleur chez les athlètes. Dans le cadre de ce mémoire de maitrise, une revue de portée a été réalisée pour mieux comprendre comment la perception de la douleur chez les athlètes de sports de contact est étudiée. Trois composantes ont été analysées : Les types de sports de contacts étudiés, les groupes auxquels ils sont comparés, et les méthodes utilisées pour induire expérimentalement la douleur. Onze études ont été retenues. Deux sous-catégories de sports de contact ont été identifiées. Les sports de combat ont plus souvent été inclus dans ces études que les sports d’équipe. Ces athlètes étaient comparés à des groupes composés de non-athlètes et d’athlètes de sports « non-contact ». Quatre méthodes d’induction expérimentale de la douleur ont été utilisés, soit, la pression mécanique, le froid, la chaleur et l’ischémie musculaire. Une justification des choix de méthode d’induction de la douleur ou types d’athlètes inclus dans le cas d’un groupe contrôle de sport non-contact est rarement fourni. Un vide existe dans la littérature quant à la comparaison de la perception de la douleur d’athlètes de sport de contact avec un groupe d’athlètes non-contact et une méthode d’induction expérimentale de la douleur choisi délibérément pour mieux refléter la réalité de la pratique sportive. Un protocole expérimental est proposé pour combler ce besoin. / Pain is a universal sensation whose descriptive terms elicit immediate recognition. The burning, itching, or sharp feelings serve as an alarm system meant to avoid bodily harm. In athletes, this warning is often ignored in the pursuit of performance. Depending on the sport, the type of pain encountered can vary. In the case of endurance athletes, pain occurs naturally within the muscle due to repeated contraction over a long period. Alternatively, athletes in contact sports must also anticipate mechanical pain caused by opponents. The difference in demand and the specificity of each sport are however very rarely taken into consideration when studying pain in athletes. A scoping review was used to better understand how pain perception in contact sport athletes is being studied. Three components were analysed: the types of contact sports being studied, the groups they are being compared to, and the methods used to experimentally induce and study pain. A total of 11 articles were included. Two subcategories of contact sport were identified. Combat sports were more often included in studies than team contact sport. These athletes were compared to both non-athletes and non-contact athletes. Four methods of experimental pain induction were used, namely, the pain pressure test, the cold pressor test, an ischemic pain protocol, and heat pain protocol. Justification was not always provided for either pain protocol selection or non-contact athletes selected as control group. A gap exists in the literature in comparing contact sport athletes’ pain perception with a deliberately chosen athlete control group using a pain induction protocol meant to emulate a facet of pain experienced during exercise. A protocol proposal is included in the discussion to meet this demand.