Gesicherte Kommunikation ueber offene und ungesicherte Netze, sichere Einbindung mobiler Clients in eigene Netze, end-to-end Verschluesselung im IP-Datenverkehr.

Workshop "Netz- und Service-Infrastrukturen" Ausgehend von den Spezifika und Zielen des Verzeichnisdienstes Active Directory werden die Differenzen zur aktuellen Technologie des URZ aufgezeigt. Es sollen Möglichkeiten dargestellt werden, Active Directory einzusetzen.

Der Vortrag gibt einen Überblick zu plattformübergreifenden Administrationstechnologien am Beispiel der Systemplattform Windows. Einführend wird auf ein Framework zur Plattformverwaltung "ToSCA" eingegangen. Die Umsetzung der Systemwartung wird am Einsatz von cygwin und cfengine dargestellt.

Magistrinio darbo tikslas yra ištirti SIP protokolo panaudojimo galimybes mobiliems prietaisams skirtuose internetinės telefonijos sprendimuose ir parengti tokio bendravimo modelį. Atlikto darbo pagrindinis rezultatas yra reikalingos literatūros apžvalga ir analizė bei eksperimentinio IP telefonijos modelio realizacija mobiliose operacinėse sistemose. Pirmame skyriuje trumpai pateikiamas įvadas apie tradicinės telefonijos evoliuciją į balso perdavimą per interneto tinklus. Taip pat, kad palaipsniui IP telefonija vis labiau realizuojama į mobilius prietaisus. Tolimesniame skyriuje, norint argumentuoti IP telefonijos augimą, aprašomas atliktas rinkos tyrimas ir jo išvados apie esamą padėtį IP telefonijos srityje. Trečiame skyriuje pateikiama informacija apie apžvelgtą literatūrą: SIP protokolo struktūrą ir savybes, įkraunamas aplikacijas į mobiliuosius terminalus bei jų palyginimas. Sekančiame skyriuje pateikiama atlikto eksperimentinio modelio realizacija: reikalavimų specifikacija, reikalavimai įrangai, pasirinktų priemonių veikimo demonstravimas mobiliose aplinkose. Penktame skyriuje parašyti pagrindiniai rezultatai ir gautos išvados, o paskutiniame – nurodomi darbe naudoti literatūros šaltiniai. / The goal of this Master Thesis is to research practice possibilities of SIP protocol in voice over IP solutions for mobile devices and to formulate such communication model. The main result of accomplished work is review and analysis of needful literature and implementation of experimental IP telephony model in mobile operating systems. In the first section is introduced the preface about traditional telephony development to a voice transfer over internet networks. Also, that IP telephony is more and more actualized to mobile devices. To prove the growth of IP telephony was done a market research and was made the conclusions about existing position in VoIP sphere. That information can be found in the next chapter. The third chapter is about reviewed literature: the structure and features of SIP protocol, applications which can be installed into mobile terminals and their comparison. In the next section of the Master Thesis is given realization of experimental model: specifications, request for hardware, demonstration of chosen software tools in mobile systems. The main results and obtained conclusions are written in the fifth chapter, literature list – in the last one.

In the quest for improving building energy efficiency raising the level of performance of the building enclosure has become critical. As the thermal performance of the building enclosure improves so does the overall energy efficiency of the building. One key component in determining the energy performance of the building enclosure is windows. Windows have an integral role in determining the energy performance of a building by allowing light and heat from the sun to enter into a space. Energy efficient buildings take advantage of this free solar energy to help offset heating energy consumption and electric lighting loads. However, windows are traditionally the least insulating component of the modern building assembly. With excessive use, larger window areas can lead to greater occupant discomfort and energy consumption from greater night-time heat loss, higher peak and total cooling energy demand from unwanted solar gains, and discomfort glare. As a result, windows must be carefully designed to not only minimize heat loss, but also effectively control solar gains to maintain both a thermally and visually comfortable environment for the appropriate climate region and orientation. In this thesis, a complete analysis of window assemblies for commercial office buildings is presented. The analysis is divided into three sections: the Insulated Glazing Unit (IGU), the Curtain Wall Section (frames), and the overall energy performance of a typical office building. The first section investigates the performance characteristics of typical and high performance IGUs, specifically its insulating value (Ucg), its solar heat gain properties (Solar Heat Gain Coefficient, SHGC), and its visual transmittance (VT) through one-dimensional heat transfer and solar-optical modeling. Mechanisms of heat transfer across IGUs were investigated giving insight into the parameters that had the most significant effect on improving each performance characteristic. With a through understanding of IGU performance, attainable performance limits for each of property were generated from combining of different glazing materials, fill gases, and coatings. Through the right combination of materials IGU performance can be significantly altered. The U-value performance of IGUs ranges from 2.68 W/m2K (R-2.1) for a double-glazed, clear, air filled IGU to 0.27 W/m2K (R-21) for a quint-glazed, low-E, xenon filled high performance IGU. The second part of the thesis looks at the thermal performance of curtain wall sections that hold the IGU through two-dimensional heat transfer modeling. Similar to the IGUs, heat transfer mechanisms were studied to by substituting different materials to determine which components are crucial to thermal performance. From this analysis improvements were made to typical curtain wall design that significantly reduces the overall heat transfer within the frame section, producing a high performance curtain wall section. With simple modifications, a high performance curtain wall section can reduce its U-value by as much as 81% over a typical curtain wall section, going from 13.39 W/m2K to 2.57 W/m2K. Thus significantly reducing the U-value of curtain wall systems, particularly for smaller windows. The final part of the thesis examines the impact of typical and high performance windows on the energy performance of perimeter offices of a high-rise commercial building located in Southern Ontario. An hourly simulation model was set up to evaluate both the annual and peak energy consumption of a typical perimeter office space. The office faced the four cardinal directions of north, east, south, and west to evaluate the effect of orientation. The model also included continuous dimming lighting controls to make use of the available daylight. The effect of exterior shading on perimeter space energy performance was also investigated with both dynamic and static exterior shading devices. The results of the simulations revealed that window properties have very little influence on the energy performance of a high internal heat gain office, that is typical of older offices with less energy efficient office equipment and lighting and a higher occupant density. Conversely, window properties, particularly the insulating value of the window, has a greater effect on the energy performance of a mid to low internal heat gain office that is typical of most modern day commercial buildings. The results show windows with lower U-values yet higher SHGC are preferred over windows of similar U-values but with lower SHGC. The results also indicate that both static and dynamic shading have very little effect on energy performance of mid to low internal heat gain offices. From this analysis optimal window areas in the form of window-to-wall ratios (WWR) are presented for each orientation for mid to low internal heat gain offices. The optimal WWR for south-facing facades are between 0.50 to 0.66, and 0.30 to 0.50 for east-, west-, and north-facing facades, while for high internal heat gain perimeter spaces window areas should be kept to a minimum.

The theoretical part of the thesis deals with the Microsoft .NET Framework, development environment Visual Studio and C # programming language issues. The practical part of the thesis deals with the Software management issues in company and the subsequent implementation of a customized solution. In the first part the practical part focuses on analysis of the current process which is based on defined requirements of the proposal for optimizing the processes of the central management software. This process is designed using a multi-layer architecture and includes a user interface on the ASP.NET platform, a central database SQLite, the internal logic of the system implemented using Windows system service and proposing a centralized repository of the source data, application scripts and installation records. In the second part focuses on the design and implementation of individual parts of the system. In the last chapter the verification methodology of the created prototype is introduced. The final evaluation summarizes the thesis, selected solutions and the results of the tests performed in a real environment. The created system allows the simple way to centrally manage applications in a company.

Conselho Nacional de Desenvolvimento Científico e Tecnológico / The variability of soil attributes is related to environmental factors affecting soil formation processes. Different techniques have been employed to map this variability, among these techniques, the reading of the magnetic susceptibility (MS) has been shown as an alternative due to its close relationship to the soil other attributes. This study aims to determine the magnetic susceptibility of Oxisol samples in a Rio Grande do Sul experimental area, related to different soil properties to understand the spatial distribution, as well to define different compartments of the landscape. The 350 ha study area is located in Santo Augusto city, three transects where were marked from the higher quota until the lower quota area, totaling 1450 m. In these transects we scored 29 points georeferenced, 50 m distance each one. Samples were collected at 0.00-0.05, 0.05-0.15, 0.15-0.30 and 0.30-0.60 meters depth where we determined the particle size distribution, soil organic carbon and the MS. Also we opened five trenches along the transects distributed over different locations in the relief along the topossequence, where the morphological description, chemical, physical, and mineralogical analysis and MS in the samples of each horizon. In study 1, the profiles data from the attributes were submitted to Pearson linear correlation test to determine the correlation of MS with the other attributes of the soil. With transects data we carried out linear regressions for each depth in order to assess how the MS contributes to the clay, sand, and soil organic carbon prediction. To verify spatial dependence of the attributes in the sample we used points geostatistics with variograms settings. The values were interpolated using the ordinary kriging and subsequently we generated maps of soil attributes on topossequência for the four depths. In the study 2 the data from transects were submitted to descriptive statistics and analysis of the "Split Moving Window" (SMW), to investigate the behavior of the MS in determining the limits of landscape compartments. According to two studies we can infer that the MS has potential for application in the mapping of certain soil attributes, as well potential for determination of landscape compartments limits. / A variabilidade dos atributos do solo está relacionada aos fatores ambientais que condicionam os processos de formação do solo. Diante disso, diferentes técnicas têm sido empregadas para mapear essa variabilidade, dentre estas técnicas, a leitura da suscetibilidade magnética (SM) tem se mostrado como alternativa por sua estreita relação com os demais atributos do solo. O presente estudo tem por objetivo determinar a suscetibilidade magnética de amostras em Latossolos de uma área experimental no Rio Grande do Sul, relacionando com diferentes atributos do solo para compreender a distribuição espacial e delimitar diferentes compartimentos da paisagem. A área de estudo de 350 ha está localizada no município de Santo Augusto, onde foram marcadas três transeções desde a cota mais elevada até a cota mais baixa da área, totalizando 1450 m. Nestas transeções foram marcados 29 pontos georreferenciados, em distância regular de 50 m entre os pontos e entre as transeções. Foram coletadas amostras das profundidades 0,00-0,05, 0,05-0,15, 0,15-0,30 e 0,30-0,60 m onde se determinou a granulometria, carbono orgânico do solo e a SM. Também foram abertas cinco trincheiras ao longo das transeções distribuídas em locais diferenciados no relevo ao longo da topossequência, onde foi realizada a descrição morfológica e análises químicas, físicas, mineralógicas e de SM nas amostras de cada horizonte. No estudo 1, os dados provenientes dos atributos nos perfis foram submetidos ao teste de correlação linear de Pearson para averiguar a correlação da SM com os outros atributos do solo. Com os dados das transeções foram realizadas regressões lineares para cada profundidade a fim de avaliar o quanto a SM contribui para a predição do teor de argila, areia e carbono orgânico do solo. Para verificar a dependência espacial dos atributos nos pontos amostrais, foi utilizada a geoestatística com ajustes de variogramas. Os valores foram interpolados por meio da krigagem ordinária e posteriormente foram gerados mapas dos atributos do solo na topossequência para as quatro profundidades. No estudo 2 os dados provenientes das amostras das transeções foram submetidos à estatística descritiva e análise da ferramenta ―Split Moving Window‖ (SMW), para averiguar o comportamento da SM na determinação dos limites de compartimentos da paisagem. De acordo com os dois estudos pode-se inferir que a SM tem potencial para aplicação no mapeamento de determinados atributos do solo, bem como potencial para determinação de limites dos compartimentos da paisagem.

Apresenta-se um pré-processador para análise de pavimentos de edifícios via método dos elementos finitos desenvolvido como um aplicativo do ambiente Windows. O programa é interativo, permitindo identificar problemas de imediato na criação do modelo a ser estudado. Possui recursos gráficos básicos para a definição geométrica da estrutura. A saída de dados é programável para que o pré-processador não se prenda a um só programa de cálculo. Assim, os mesmos dados de uma estrutura podem ser analisados por diferentes programas de cálculo o que possibilita a escolha do programa mais adequado, dependendo do tipo de análise desejado. O aplicativo tem recursos para definir elementos finitos de barra e placa. Como o número desses elementos normalmente é grande, eles são gerados de uma forma automatizada. / lt is presenting a Windows preprocessar for building slab analysis by Finite Element Method. lt is an interactive program, allowing problems to be identified while the model is generated. It has graphical resources to define the structure. The program output is defined by the user; therefore it is possible to use the preprocessar with many other finite element programs. This allows the engineer to choose the appropriate program depending on the kind of analysis is wanted. The program can define frame and shell finite elements. As slabs usually need large numbers of these elements to be properly analyzed, they are generated using automatic meshing.

Beräkningskluster används exempelvis till vädersimuleringar eller produktsimulering. Microsoft HPC-kluster tillhandahåller två olika typer av beräkningsnoder var av den ena är Computenod, som körs med operativsystemet Windows Server 2008 R2, och den andra är Workstationnod, som körs med operativsystemet Windows 7. Arbetets syfte är att jämföra operativsystemen Windows 7 och Windows Server 2008 R2 för att se om de presterar likartat som en beräkningsnod. Detta avgörs med avseende på energieffektivitet samt hur de presterar i Linpack. Linpack är ett prestandaverktyg som mäter ett beräkningsklusters beräkningsförmåga i flyttalsoperationer per sekund. Studien utförs genom en experimentell metod. Några studier om att operativsystemen Windows 7 och Windows Server 2008 R2 presterar likartat finns inte. Därför motiveras det till att verifiera hypotesen att de ska prestera likartat inom beräkningskluster. Eftersom båda operativsystemen är byggda på Windows NT 6.1, bör de prestera likartat (Microsoft msdn, 2012). Studier av Narayan och Shi (2009, 2010) visar att operativsystem presterar olika med TCP och UDP protokollen. De visar även att operativsystemen presterar olika på applikationslagret. En annan studie av Abouelhoda och Mohamed (2009) visar att valet av operativsystem påverkar resultaten för deras testverktyg, WinBioinfTools. Testverktyget utvärderades på Linux-kluster och Microsoft HPC-kluster. Sottile och Minnich (2004) visar i sin studie att beräkningsförmågan påverkas av operativsystemen. Bidraget för denna studie är att administratörer ska kunna använda resultaten som underlag när de ska motivera valet av vilken typ av beräkningsnod som ska väljas till ledningen i organisationer eller företag. Resultatet visar att operativsystemen presterar ungefär lika efter att vissa processer har stängts av i Windows 7. De processer som stängts av körs inte på operativsystemet Windows Server 2008 R2 utan endast på Windows 7. En slutsats som dras är att processerna som körs påverkar resultaten. Processerna bör därför stängas av om de inte är nödvändiga för företaget eller organisationen. Stängs onödiga processer av, ökar energieffektiviteten och prestandan för beräkningsklustret vilket medför att bidraget till den globala uppvärmningen minskar eftersom energin går åt till att beräkna uppgifterna och inte onödiga processer.

Projektet som denna rapport beskriver hade som målsättning att utveckla två applikationer på beställning av företaget Teknikhuset Umeå. En av dessa applikationer skulle vara till Windows 8 plattformen och den andra till Windows Phone 8 plattformen. Applikationernas syfte var att ge användaren information om högtider från kyrkoåret med hjälp av information hämtad från Svenska Kyrkans kalender API (se Henrik Johanssons rapport). Denna rapport beskriver utformandet av användargrässnitten till dessa två plattformar. Syftet med rapporten är att undersöka hur utvecklaren kan bygga ett optimalt användargränssnitt för respektive plattform och samtidigt undersöka om det finns likheter i dessa två utvecklingsprocesser. Om likheter i utvecklingsprocessen observeras så kommer dessa dokumenteras för att i framtiden kunna effektivisera utvecklingsprocessen för applikationer avsedda för dessa två plattformar. Förutom att beskriva utformandet av gränssnitten så beskriver rapporten också relevanta delar av plattformarnas respektive användargränssnitt så att läsaren kan förstå resonemanget bakom de beslut som tagits vid utformandet av användargränssnittet. Projektet resulterade i två användarvänliga användargränssnitt, ett till en Windows Phone 8 applikation och ett till en Windows 8 applikation.