The aim of this thesis is to create a port of the Zephyr realtime operating systemfor the LEON processor platform. The LEON is a frequently used computing corefor spaceflight applications, with ample flight heritage. It is based upon the wellestablished SPARC v8 instruction set, and offers many extensions to ease softwaredevelopment and increase overall processor performance. An overview of the nec-essary steps towards a functional architecture port is given in this report. Specialemphasis is put upon the interrupt handling and context switching. One LEONspecific feature introduced with the GR716 LEON3-FT microcontroller, registerwindow partitioning, is used to increase the performance of the context switchingmechanism in the operating system. By using this feature, context switching timehas shown to decrease significantly, while easing verification of the overall softwaresystem by providing dedicated partitions for tasks with hard realtime requirements. / Det övergripande målet med examensarbetet är att porta Zephyr realtidsopera-tivsystem (OS) till LEON processorplattformen. LEON processorn är ursprungligendesignad för och förekommer ofta i datorsystem inom rymd p.g.a. sina feltolerantaegenskaper. LEON är kompatibel med den öppna SPARC v8 instruktionsuppsät-tningen vilken också tillåter utökning och anpassningar. Rapporten ger läsaren enöverblick av vilka steg som är nödvändiga för att skapa en fungerande arkitektur-port av ett OS. Vidare beskriver rapporten mer i detalj designen kring trådväxlingoch avbrottshantering, samt hur dessa anpassas för att utnyttja LEON specifikautökningar av SPARC till att nå högre prestanda. GR716 LEON3-FT introducerarpartitionering av SPARC registerfönster för att kunna minska tiden det tar opera-tivsystemet att växla trådar. Denna funktion har inte använts tidigare i något OS,och är därför av särskilt intresse att studera och karakterisera. Resultaten visar atttrådväxlingstiden minskat signifikant, samtidigt som determinismen blivit bättreoch därigenom är det nu enklare att designa system med hårda realtidskrav.

The purpose of this essay is to examine Leon Kirchner’s "For Cello Solo" for the preparation of a performance. The score, manuscripts, and recordings were analyzed to better inform the author’s interpretation of the work. Backgrounds for both the piece and the composer are included to illuminate the origins of the work. Additional information was accumulated through interviews with Carter Brey and Maria Kitsopoulos, performers of the work who collaborated with the composer. This essay aims to aid a performer’s preparation and interpretation of the composition by describing the piece’s historical and biographical context, analyzing its compositional design, and addressing specific sound and musicality issues related to the work.

Pimple mounds are circular to elliptical domes with basal diameters ranging from 3 to more than 30 m, and heights of 30 cm to more than 2 m above intermound levels. For almost two centuries, the origin of these features has been speculated upon by scientists without general consensus as to one of over 30 different mechanisms suggested for their origin. These soil microfeatures can be observed throughout portions of East Texas as well as Louisiana, Arkansas, Oklahoma, and Missouri. Pimple mounds have been extensively mapped throughout East Texas as complexes covering over 1.0 million ha in 47 soil survey areas. About 600,000 ha are on Pleistocene-age geological formations. This study focused on 5,500 ha in Leon County, Texas, mapped as Rader-Derly complex and Derly-Rader complex. Rader (Aquic Paleustalfs) is on mounds and Derly (Typic Glossaqualfs) in the low intermounds. These soils are mapped primarily on terraces of the Trinity River system within the survey area. Using elevation levels published for the various fluviatile terrace deposits of the Trinity River, six groups (five terrace level groups and an upland group) were identified for analysis of mounds within the study area. Processes and factors of soil formation during the life of these features were considered using two methods ? remotely sensed elevation data and sampling data collected in the field. Size, shape, and relief of mounds were analyzed using airborne-based, remotely sensed LiDAR (Light Detection and Ranging) elevation data. Particle size distributions and pedon descriptions of mounds formed on materials of various ages were compared across the study area with special emphasis given to spatial trends. Analyses indicate a fluvial origin with pimple mound orientation corresponding to surrounding ridge and swale features of the paleoriver. Pimple mounds within the study area formed in the presence of sandy to loamy alluvial sediments and require the presence of accretionary ridge microtopography over point bar deposits. This alluvial parent material and topography were further developed by fluctuations in climate and vegetation over time. The erosional influence of bioturbation by animals and the intense rainfall and flood events which frequent the study area provided an environment in which these soil microfeatures have developed and over time exhibit increased levels of pedogenesis.

Der vorliegende Aufsatz unternimmt den Versuch, die einst für die Kommunikationswissenschaft höchst relevante „Theorie der kognitiven Dissonanz“ des Sozialpsychologen Leon Festinger erneut ins wissenschaftliche Bewusstsein zu rücken. Während der Dissonanzforschung innerhalb der Psychologie auch heute noch Erkenntnispotentiale zugesprochen werden, ist sie in der Kommunikationswissenschaft kaum mehr von Bedeutung. Betrachtet man aber aktuelle Forschungsfragen, mit denen sich Kommunikationswissenschaftler beschäftigen, fällt auf, dass gerade die Dissonanzforschung alternative Erklärungen für gegenwärtige Probleme in Mediengesellschaften bieten kann. Diese Annahme wird am Beispiel der Politikverdrossenheit und unter Rückgriff auf das Konzept der „Dis-Identification“ einer explorativen Prüfung unterzogen. / This paper attempts to reconsider the value of Festinger’s „Theory of Cognitive Dissonance“ on mass media topics. Investigations in cognitive dissonance still represent an important field of research in social psychology. Yet, despite having once been one of the most important psychological theories on selective exposure, the concept is barely seen as relevant to current communication studies. Indeed, Festinger’s assertions have lost scientific importance in media studies. However, if one examines the present research topics in communication science, several objects of investigation can be identified that seem to call for psychological explanations in general and for Dissonance Theory predictions in particular. Thus, a reintegration seems to be worthwhile. The author exemplifies this intention by connecting political malaise with the concept of “Dis-identification”.

This dissertation describes the results of archaeological survey and excavationsundertaken on the Mesa el Chaparral in the county of Mina in Nuevo Leon, Mexicoduring 2001. Sixty-six previously undocumented archaeological sites were discovered onthe arid surface. Excavations found no intact subsurface deposits, but a wealth of surfacedata was collected. Subsequent analyses demonstrated a forager lifeway for the majorityof the Holocene human occupation of the region in a remarkably stable pattern.To understand sites found on the deflated modern surface necessitatedcontemplation of the basic theories and models used in hunter-gatherer research. Thisallowed for the construction of new diagrams designed to hypothesize fundamentalrelationships between general aspects of the lifeway including environmental factors, sitesize and visibility issues, and human mobility patterns. From some basic continuums,more detailed diagrams were created that allow understanding and prediction of humanbehavior based upon data found from artifacts and features. After testing their salience,the models were dynamically combined with the site data and ethnographic analogies toarrive at an understanding of the human lifeways represented by the recoveredarchaeological data. This provided a fascinating look into the day-to-day lives of thegeneralized mobile foragers of prehistoric northeastern Mexico.Included in the recovered data are hearth features, lithic debitage and artifacts,and basic site descriptions. Archaeological locations ranged from small with a singlefeature to over a square kilometer with over 100 features, all located on the surface wherethey are subject to wind deflation and water erosion. Most of the sites containeddiagnostic artifacts from the entire Holocene, further compounding the analyticcomplexity of the project. Understanding the context of the data and making use of themodels and ethnographic analogies, it was estimated that every site represented anoccupation by a small band of mobile forgers making generalized use of the resourcesavailable in the region. Making residential moves often allowed people to survive in theharsh environment. Few lifeway changes were noted prior to Spanish influence in theregion from the time the environment became arid at the end of the Pleistocene.

Zugl.: Hamburg, Universiẗat, Diss., 2006.

Thesis (Ph. D.)--Florida State University, 2005. / Advisor: Dr. Frances C. James, Florida State University, Collece of Arts and Sciences, Dept. of Biological Science. Title and description from dissertation home page (viewed June 7, 2005). Document formatted into pages; contains xvii, 141 pages. Includes bibliographical references.

Thesis--Universität Göttingen, 2001. / Includes bibliographical references (p. 380-429) and indexes.

The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on March 24, 2010). Thesis advisor: Professor James H. Calvin. Includes bibliographical references.

Thesis--Universität Göttingen, 2001. / Includes bibliographical references (p. 380-429) and indexes.