Design and construction of a scintillating fibre tracker for measuring hard exclusive reactions at HERMES

This thesis describes design and construction of the SFT. The first section gives a comprehensive overview of the experimental set-up of HERMES and its components relevant for DVCS analysis. The second section introduces the Recoil Detector and Monte Carlo (MC) studies performed to evaluate the requirements for the individual detector parts. In the third section a detailed description of the design parameters and constraints is given and the chosen materials and assembling methods are discussed. This section is complemented by reporting results of the performance of SFT prototype modules from a test experiment conducted at GSI. Finally, an introduction into the GPD formalism and its application to nuclei is given in the fourth section and pioneering results of DVCS off nuclei are presented in the fifth section.Im Rahmen dieser Arbeit wird die Planung und der Bau eines Spurrekonstruktionsdetektors aus szintillierenden Fasern (SFT) für den HERMES Recoil-Detektor beschrieben. Dies umfaßt die Festlegung der Entwurfsziele, Entwicklung von Herstellungverfahren, Auswahl der Detektorbestandteile sowie die Durchführung und Auswertung von Komponententests. Abschließend wird eine Einführung in den Generalised Parton Distribution-Formalismus (GPD) zur Beschreibung der nicht-perturbativen Nukleonstruktur gegeben. Dieser Formalismus kann auch auf Atomkerne angewendet werden und zu neuen Einsichten in die Kernstruktur und partonische Freiheitsgrade im Kern führen. Anschließend wird die Analyse tief-virtueller Compton-Streuereignisse an verschiedenen Kernen beschrieben

Determining the orientation parameters using the mems accelerometer and magnetometer

Для определения положения объекта на поверхности Земли наибольшее распространение получили географические координаты, с помощью которых можно наблюдать ориентацию и навигацию объекта. Информация об ориентации объекта в пространстве является основополагающей для задач навигации этого объекта на Земле [2]. В географической системе координат задача ориентации понимается как определение углового положения относительно горизонтальной плоскости и направления на север. Одним из самых известных устройств, используемых для определения углового положения объекта относительно направления на магнитный север, является магнитный компас. В этой работе будет рассмотрен современный электронный компас, основанный на тр?хосных МЭМС акселерометре и магнетометре.This article describes the temperature control system for a downhole tool. The peculiarity of this system isthat it is using a heater and an active cooler which are controlled by pulse width modulation. The basis of such asystem is taken from the thermostatic scheme of the inclinometer IGN 100-100 / 60-A. However, this scheme hasserious drawback - conducted interference. These disturbances affect the operation of a downhole power supply,and therefore the entire electronic inclinometer instrumentation. This article briefly describes the principle of thetemperature control system. Furthermore, reasons for this interference are discussed in detail, calculated the valueof failures in the selection of power, the graphs clearly show the changes in the signal. The problematic elements ofthe scheme, affecting the appearance of interference, are identified. The possible solutions to eliminate thisinterference are analyzed, stating the shortcomings of each of the solutions

Озеро Гусиное как источник водоснабжения

Рассмотрены проблемы озера Гусиное, как единственного источника питьевого водоснабжения г. Гусиноозерск. Несмотря на это в озеро сбрасываются сточные воды населённых пунктов и промышленных предприятий, таких как Гусиноозерская ГРЭС и угольные разрещзы. Это приводит к заметному негативному влиянию на качество поверхностных вод. The problems of Goose lake as the only source of drinking water supply Gusinoozersk. Despite this the lake is discharged in the waste water of the "Gusinoozerskaya GRES", municipal water Gusinoozersk, which negatively affect water quality in the lake

Myb-binding Protein 1a (Mybbp1a) Regulates Levels and Processing of Pre-ribosomal RNA

Ribosomal RNA gene transcription, co-transcriptional processing, and ribosome biogenesis are highly coordinated processes that are tightly regulated during cell growth. In this study we discovered that Mybbp1a is associated with both the RNA polymerase I complex and the ribosome biogenesis machinery. Using a reporter assay that uncouples transcription and RNA processing, we show that Mybbp1a represses rRNA gene transcription. In addition, overexpression of the protein reduces RNA polymerase I loading on endogenous rRNA genes as revealed by chromatin immunoprecipitation experiments. Accordingly, depletion of Mybbp1a results in an accumulation of the rRNA precursor in vivo but surprisingly also causes growth arrest of the cells. This effect can be explained by the observation that the modulation of Mybbp1a protein levels results in defects in pre-rRNA processing within the cell. Therefore, the protein may play a dual role in the rRNA metabolism, potentially linking and coordinating ribosomal DNA transcription and pre-rRNA processing to allow for the efficient synthesis of ribosomes

Influence of information technology on homeland security

The modern world is a complexly organized system, a space of global information technologies (IT). Information today is the main determinant of society, and the rapid development of IT, which penetrate into all spheres of our life, opens up completely new opportunities for social progress, as well as certain problems and challenges. Since information technologies are widely used in business, politics, and national development, they have become an attractive target for hacker attacks; as well as a very powerful tool which can threaten state's national security. This paper examines the issue of information technology and its role in homeland security protection, as well as the key problems associated with increasing their influence in the world

Режимы лазерного восстановления оксида графена

Обработка светом (фотолитография) хорошо зарекомендовала себя в твердотельной электронике и на данный момент играет важную роль в микроэлектронной промышленности. С данной точки зрения представляется научный интерес работы по возможностям модификации пленок ОГ для получения гибкой, биосовместимой и "зеленой" электроникиPhotolithography is a powerfull instrument for designing a solid state electronics. Today is plays an important role in the microelectronic industry. Scientific interest of this work is on the possibilities of modifications of the graphene oxide film to obtain flexibility, biocompatible and "green" electronic