Virtuell träning är ett viktigt sätt att utbilda tekniker för att förbereda dem för underhållsarbete i verkligheten. Tekniker som utbildas för att utföra underhållsarbete på JAS 39 Gripen, genomför delar av utbildningen genom programmet Virtual Maintenance Trainer (VMT), som kan återge en detaljerad simulering av flygplanet under drift. Teknikerna kan delta i lektioner med specifika uppgifter som inkluderar att felsöka interna datorer och delar av flygplanet samt utföra underhållsarbete för att åtgärda fel. Programmet är dock skrivbordsbaserat och för att göra utbildningen mer effektiv, finns det en önskan om att utforska möjligheterna i virtual och augmented reality. Denna rapport undersöker alternativen för utbildningsverktyg i virtual reality och augmentedreality genom en teoretisk undersökning. I undersökningen vägs fördelar och nackdelar för nuvarande implementeringar för att tillhandahålla ett optimalt system som kan fungera för att ge tekniker praktisk erfarenhet i en realitisk träningssimulering. Baserat på resultaten från undersökningen och genom att använda spelmotorn Unity, har enprototypsapplikation skapats som kan simulera teknikerutbildning på en modell av JAS 39 Gripen. HTC Vive och Leap Motion användes för att låta användaren kliva in i simuleringsvärlden och för att möjliggöra realistisk interaktion. En tekniker kan lära sig att utföra underhållsåtgärder genom att genomföra olika träningsförfaranden i simuleringen genom att gå runt och interagera med ett fullskaligt Gripen-flygplan. / Virtual training is a vital way of educating technicians to make them prepared for real maintenance work. Technicians that are educated to perform maintenance work on JAS 39 Gripen, complete parts of their training through the application Virtual Maintenance Trainer (VMT), which can provide a detailed simulation of the aircraft during operation. The technicians are able to complete courses and lessons with specific procedures such as debugging internal computers and parts of the aircraft and performing maintenance work to fix errors. However, the application is desktop-based and to make the education even more effective, there is a desire to explore the possibilities in virtual and augmented reality. This report explores the alternatives of education tools in virtual reality and augmented reality through a survey. In the survey, the advantages and disadvantages of current implementations are examined to provide an optimal system which could work to give technicians a realistic practical training simulation experience. Based on the results of the survey and by using the game engine Unity, a prototype application is built which can simulate technician training procedures on a model of JAS 39 Gripen. HTC Vive and Leap Motion were used to immerse the user into the simulation world and to enable realistic interaction. A technician may be able to learn through completing different training procedures in the simulation by walking around and interacting with a full-scaled Gripen aircraft.

Perched water zones have been identified in the fractured, welded tuff in the semiarid to arid environments of Yucca Mountain, Nevada and near Superior, Arizona. An understanding of the formation of such zones is necessary in order to predict where future perched water might form at Yucca Mountain, the proposed site of a high-level nuclear waste repository. The formation or growth of a perched zone above a repository is one factor of the factors to be considered in the risk assessment of the Yucca Mountain site. The Apache Leap Research Site (ALRS) near Superior, Arizona is a natural analog to the Yucca Mountain site in terms of geology, hydrology, and climate. Perched water has been identified over an area of at least 16 km² in the Apache Leap Tuff, a mid- Miocene fractured, welded ash-flow tuff. A primary goal of this investigation was to characterize the physical and hydrologic properties of the tuff in the region above and including the perched zone, and to evaluate those characteristics to develop a model for a perching mechanism in the tuff. A second goal was to determine what fraction of water entering a watershed reaches the subsurface, to potentially recharge the perched zone. The Apache Leap Tuff has been subject to considerable devitrification and vapor phase crystallization, which dominate the character of the rock. With depth to the perched zone, pumice fragments become increasingly flattened and segregated; the pumice fragments are the primary locations of porosity in the rock, therefore porosity also becomes greatly reduced with depth, to the extent that the rock matrix is virtually impermeable at the perched water zone. Fractures are the primary pathways by which water moves through the rock; fracture hydraulic conductivity values were determined to be nine orders of magnitude greater than measured matrix hydraulic conductivity at the perched zone. An increase in fracture filling by silica mineralization beneath the perched zone reduces the secondary permeability, enhancing the formation of perched water. Thus, the primary mechanisms for the formation of the perched zone include fracture flow bringing water into the subsurface, combined with extremely low matrix hydraulic conductivity at depth, and reduced secondary permeability by filled fractures and lower fracture density. Water budgets were calculated for two years in a 51.4-ha watershed. Direct measurements were made of precipitation and runoff', evapotranspiration was both directly measured, and modeled based on measurement of a number of weather parameters. Infiltration was calculated as the residual of precipitation after runoff and evapotranspiration were removed. Infiltration was determined to be less than 10% of the annual water budget; evapotranspiration removes on the order of 90% of precipitation on an annual basis.

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This paper describes the current internationally recognized atomic time scales of International Atomic Time (TAI), Coordinated Universal Time (UTC), and Global Positioning System (GPS) Time as well as solar based Universal Time. The concept of Leap Seconds and the differences between the time scales are discussed. A brief history of the international agreements that created organizations responsible for maintaining these time scales is provided. A brief review of the GPS 1999 (Week Number Roll Over) WNRO with its potential GPS user problems is provided. Prudent personal precautions are proposed for the Year 2000 (Y2K) Rollover.

The new industry revolution creates a vast transformation in the manufacturing methods. Embedded Intelligence and communication technologies facilitate the execution of the smart factory. It can provide lots of features for strong customization of products. Assembly system is a critical segment of the smart factory. However, the complexity of production planning and the variety of products being manufactured, persuade the factories to use different methods to guide the workers for unfamiliar tasks in the assembly section. Motion tracking is the process of capturing the movement of human body or objects which has been used in different industrial systems. It can be integrated to a wide range of applications such as interacting with computers, games and entertainment, industry, etc. Motion tracking can be integrated to assembly systems and it has the potential to create an improvement in this industry as well. But the integration of motion tracking in industrial processes is still not widespread. This thesis work provides a fully automatic tracking solution for future systems in manufacturing industry and other fields. In general a configurable, flexible, and scalable motion tracking system is created in this thesis work to amend the tracking process. According to our environment, we have done a research between different motion tracking methods and technologies including Kinect and Leap Motion sensor, and finally the leap motion sensor is selected as the most appropriate method, because it fulfils our demands in this project. Multiple Leap motion sensors are used in this work to cover areas with different size. Data fusion between multiple leap motion sensors can be considered as another novel contribution of this thesis work. To achieve this goal data from multiple sensors are combined. This system can improve the lack of accuracy in order to creating a practical industrial application. By fusion of several sensors in order to achieve accuracies that allow implementation in practice, a motion tracking system with higher accuracy is created.

Abstract High stakes testing is popularly examined in educational research, but contemporary analyses tend to reflect a qualitative or quantitative research design (e.g., Au, 2007; Cochran-Smith & Lytle, 2006; Gamble, 2010). Exhaustive debate over the relative success or failure of high stakes testing is often framed between competing visions of epistemological constructs, and the historical foundations of high stakes testing policies are rarely explored. The origins of high stakes testing can be traced to local school reform efforts in states like Louisiana, and investigating the roots of high stakes testing at the state level contextualizes the national debate on student assessment in research and scholarship. Using historical research methods, this project details the local campaign to implement the Louisiana Educational Assessment Program (LEAP) as Louisiana’s comprehensive high stakes testing program. Enacted under state law in 1986, the LEAP is a series of K-12 student assessments aligned to prescriptive state standards. The LEAP is among the nation’s longest comprehensive high stakes testing programs and is the centerpiece to Louisiana’s school accountability system. The narrative of its development offers critical insight into the overarching rationales for high stakes testing that continue to drive accountability policies throughout the country. This study interweaves sociological and political history into a singular chronological record of the LEAP. Historical research methodology informs this study by establishing the basis for data collection and analysis. Historical research method is the systematic collection and evaluation of primary source data in order to determine trends, causes, or effects of past events (Gay, 1996; Lucey, 1984). Methods used in this research investigation include document analysis and oral history interviews. Multiple data sources are used to gain a thorough understanding of the historical context surrounding the implementation of the LEAP. The LEAP functions as both a student assessment program and policy of school accountability, and the story of its development is an important narrative within the field of high stakes testing research and scholarship.

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The purpose of this mixed methods sequential exploratory study was to develop an understanding of the ways in which graduates of liberal arts programs recognize, make meaning of, and apply the competencies developed as an undergraduate within the workplace. In the first quantitative phase of the study, the research questions addressed the association among liberal arts graduates’ perceived importance, academic preparation, and assessment of value attributed by employers of eight critical skills in the workplace and any differences based on participants’ academic domain. The data were collected via a self-developed web-based survey (N=328) sent to graduates of six institutions representing four different Carnegie classifications. The overall response rate was 9.4%. A chi-square analysis in conjunction with the Holm-Bonferroni procedure yielded a statistically significant relationship in five of nine academic domain relationships. A post-hoc contingency table analysis further revealed statistically significant results between academic domain and perception value categories. In the second qualitative phase, eight case studies, consisting of graduates of liberal arts programs from four Carnegie classifications and four academic domains, delved deeper into the results from the first phase. Four themes emerged during the within- and cross-case analysis related to participants’ perceptions of the use of critical skills in the workplace: (1) Personal accountability to the job, (2) workplace dynamics among coworkers, clients, and supervisors, (3) self-awareness of what is important in the workplace, and (4) employer support of the liberal arts in the workplace. The final phase of the study integrated the quantitative results and qualitative findings to determine broad-scale outcomes of the study. Based on the overall analysis, the study provides policy implications and recommendations related to practical skill development within liberal arts programs.

Context. Gestural interfaces involves the ability of technology identifying and recognizing human body language and then interpret this into commands. This is usually used to ease our everyday life, but also to increase usability in for example mobile phones. Objectives. In this study the use of a gestural interface is evaluated as an interaction method to facilitate the introduction of new and novice users to 3D modeling tools. A gestural interface might reduce the modeling time without making an impact on the quality of the result. Methods. A gestural interface is designed and implemented based on previous research regarding gestural interfaces. Time and quality results are gathered through an experiment where participants are to complete a set of tasks in the modeling tool Autodesk Maya that relates to modeling. These tasks are executed in both the implemented gestural interfaces as well as the standard interface of Autodesk Maya. User experience is also gathered through the use of a SUS questionnaire. Results. 17 participants took part in the experiment. Each participant generated time and quality results for each task of the experiment for each interface. For each interface the user experience was recorded through a SUS questionnaire. Conclusions. The results showed that the use of a gestural interface did increase the modeling time for the users, indicating that the use of a gestural interface was not preferable as an interaction medium. The results did show that the time difference between the interfaces was reduced for each completed task, indicating that the gestural interface might have an increase in learnability of the software. The same indication were given from the SUS questionnaire. Also, the results did not show any impact on the quality.

Based on primary sources pertaining to the village of Zhaitan, this thesis studied the economic transition of households in a village in the south of Anhui Province as they went through the revolutions, political movements and reforms of the twentieth century. The transition was divided into four periods, corresponding to four of the chapters of this text. The first period was from 1927 to 1949, on which I depicted the household economy in a village that had not yet experienced intervention by the powers of the state; the second period was from 1949 to 1962, during which the Land Reform and the cooperative movement were the most significant revolutions in the rural area. The third period was 1963–1978, when the commune system was adjusted in response to the failure of the Great Leap Forward and was continued stably from then on. The last period was the reform period which ran from late-1978 until 1992. During this period, the collective system was abandoned and state control on the rural economy was gradually loosened. In the course of transition of the household economy in Zhaitan, I focused on the conflict between the growing population and the limited resources of the village. Before the 1949, the solution was to go into businesses outside the village; in the 30 years after 1949, under the framework of the collective system and the control of the state command, the peasants managed to develop labour-intensive production to meet the needs of the growing population; in the reform period after 1978, with the overall withdrawal of state intervention in rural areas, the tension was finally released through the market and the development of industry. The experience of Zhaitan reveals that the change of land ownership did not make a difference to the economic condition of most households if the land area was much less than what was needed. It also shows that the collective system of agriculture, however, could promote agricultural production, and thus brought about positive effects on the condition of each household through centralised management of the labour force and the land. Last, but not least, the overall boost to rural household economy is relient on the development of the industry to complete the transfer of rural workforce from the agriculture.

Virtual reality is a concept that has existed for some time but the recent advances in the performance of commercial computers has led the development of different commercial head mounted displays, for example the Oculus Rift. With this growing interest in virtual reality, it is important to evaluate existing techniques used when designing user interfaces. In addition, it is also important to develop new techniques to be able to give the user the best experience when using virtual reality applications. This thesis investigates the design of a user interface for a virtual reality using Oculus Rift combined with the Razer Hydra and Leap Motion as input devices. A set of different graphical user interface components were developed and, together with the different input devices, evaluated with a user test to try to determine their advantages. During the implementation of the project the importance of giving the user feedback was shown. Adding both visual and aural feedback when interacting with the GUI increases the usability of the system. According to the conducted user test, people preferred using the Leap Motion even if it was not the easiest input device to use. It also showed that the current implementation of input devices was not precise enough to be able to draw conclusions about the different user interface components.