800 research outputs found
Sigmund Freud contra Helga Grebing - Kommentierende Anmerkungen zu den Beiträgen von Max Bloch, Karsten Rudolph, Meik Woyke und Walter Mühlhausen
No full textConcentrating on the contributions of Max Bloch, Karsten Rudolph, Meik Woyke and Walter Mühlhausen the author sums up the contributions of this volume in order to reflect on the current state of research in the field of the historiography of biographies of leading social democrats. He discusses remaining lacunae in research and develops perspectives for future research
B --> ([rho]/[omega]) [gamma] at BaBar
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.In title on title page, "[right arrow] appears as the symbol; and "[rho]", "[omega]" and "[gamma]" appear as lower-case Greek letters.Includes bibliographical references (leaves 203-205).This document describes the measurements of the branching fractions and isospin violations of the radiative electroweak penguin decays B [right arrow] ([rho]/[omega]) [gamma] at the asymmetric energy e+e- PEP-II collider with the BABAR detector. Together with the previously measured branching fractions of the decays ... the ratio of CKM-matrix elements Vtd=Vts are extracted and the length of the far side of the unitarity triangle is determined.by Karsten Köneke.Ph.D
A Flexible Attitude Control System for Three-Axis Stabilized Nanosatellites
No full textThis thesis investigates a new concept for the flexible design and verification of an ADCS for a nanosatellite platform. In order to investigate guidelines for the design of a flexible ADCS, observations of the satellite market and missions are recorded. Following these observations, the author formulates design criteria which serve as a reference for the conceptual design of the flexible ADCS. The research of the thesis was carried out during the development of TU Berlin's nanosatellite platform TUBiX20 and its first two missions, TechnoSat and TUBIN. TUBiX20 targets modularity, reuse and dependability as main design goals. Based on the analysis of design criteria for a flexible ADCS, these key design considerations for the TUBiX20 platform were continued for the investigations carried out in this thesis. The resulting concept implements the ADCS as a distributed system of devices complemented by a hardware-independent core application for state determination and control. Drawing on the technique of component-based software engineering, the system is partitioned into self-contained modules which implement unified interfaces. These interfaces specify the state quantity of an input or output but also its unit and coordinate system, complemented by a mathematical symbol for unambiguous documentation. The design and verification process for the TUBiX20 ADCS was also elaborated during the course of this research. The approach targets the gradual development of the subsystem from a purely virtual satellite within a closed-loop simulation to the verification of the fully integrated system on an air-bearing testbed. Finally, the concurrent realization of the investigated concept within the TechnoSat and TUBIN missions is discussed. Starting with the individual ADCS requirements, the scalability of the approach is demonstrated in three stages: from a coarse, but cost- and energy-efficient configuration to realize a technology demonstration mission with moderate requirements (TechnoSat) to a high-performance configuration to support Earth observation missions (TUBIN)
The Governance of Global Industry Associations:The Role of Micro-Politics
No full textThis insightful book examines the role of micro-politics in the life of global industry associations. Karsten Ronit addresses the various rules and norms required to administer these associations, highlighting the importance of managing variations in complex member demands and responding to expectations in their institutional environment. Posing a variety of empirical and theoretical challenges, the author charts the state of the art in the study of industry associations, evaluating the current condition of research in the field. Ronit offers a systematic approach to the role of global industry associations, identifying, classifying and analysing the diverse population of industry associations and the expressions of micro-politics that occur within them. Addressing key dilemmas such as leadership, resource allocation and regulation, Ronit examines the many policy areas in which industry associations are active and the areas in which their activities overlap with other policy actors. Offering a critical conceptual exploration of the significance of industry associations, this cutting-edge book is crucial reading for scholars and students researching business and politics, particularly those interested in associational governance in global industries. It will also benefit practitioners working in business associations and consulting firms, as well as policymakers addressing industry association
Conductometric titrations in the presence of indifferent electrolytes using bright platinum electrodes
No full textApplied Science
Ein flexibles Lageregelungssystem für dreiachsenstabilisierte Nanosatelliten
No full textPublished in print by Universitätsverlag der TU Berlin, ISBN 978-3-7983-2968-3 (ISSN 2512-5141)This thesis investigates a new concept for the flexible design and verification of an ADCS for a nanosatellite platform. In order to investigate guidelines for the design of a flexible ADCS, observations of the satellite market and missions are recorded. Following these observations, the author formulates design criteria which serve as a reference for the conceptual design of the flexible ADCS. The research of the thesis was carried out during the development of TU Berlin's nanosatellite platform TUBiX20 and its first two missions, TechnoSat and TUBIN. TUBiX20 targets modularity, reuse and dependability as main design goals. Based on the analysis of design criteria for a flexible ADCS, these key design considerations for the TUBiX20 platform were continued for the investigations carried out in this thesis. The resulting concept implements the ADCS as a distributed system of devices complemented by a hardware-independent core application for state determination and control. Drawing on the technique of component-based software engineering, the system is partitioned into self-contained modules which implement unified interfaces. These interfaces specify the state quantity of an input or output but also its unit and coordinate system, complemented by a mathematical symbol for unambiguous documentation. The design and verification process for the TUBiX20 ADCS was also elaborated during the course of this research. The approach targets the gradual development of the subsystem from a purely virtual satellite within a closed-loop simulation to the verification of the fully integrated system on an air-bearing testbed. Finally, the concurrent realization of the investigated concept within the TechnoSat and TUBIN missions is discussed. Starting with the individual ADCS requirements, the scalability of the approach is demonstrated in three stages: from a coarse, but cost- and energy-efficient configuration to realize a technology demonstration mission with moderate requirements (TechnoSat) to a high-performance configuration to support Earth observation missions (TUBIN).Diese Dissertation untersucht ein neues Konzept zur flexiblen Entwicklung und Verifikation eines Lageregelungssystems für eine Nanosatellitenplattform. Als Grundlage für die Erarbeitung eines Leitfadens für die Entwicklung werden zunächst Beobachtung des Satellitenmarkts sowie konkreter Missionen zusammengetragen. Darauf aufbauend formuliert der Autor Entwurfskriterien für die Konzipierung eines flexiblen Lageregelungssystems. Die Dissertation wurde im Rahmen der Entwicklung der TUBiX20 Nanosatellitenplattform und ihrer ersten beiden Missionen, TechnoSat und TUBIN, an der TU Berlin durchgeführt. TUBiX20 verfolgt Modularität, Wiederverwendung und Zuverlässigkeit als Entwicklungsziele. Diese werden unter der Verwendung der vom Autor hergeleiteten Entwurfskriterien in dieser Arbeit im Kontext des Lageregelungssystems verfeinert. Das resultierende Konzept setzt dieses als verteiltes System von Geräten und einem hardware-unabhängigen Software-Kern um. Der Software-Entwurfstechnik Component-based software engineering folgend ist das System in unabhängige Module unterteilt, welche wiederum einheitliche Schnittstellen implementieren. Diese Schnittstellen spezifizieren die Zustandsgrößen für die Ein- und Ausgänge der Module inklusive Einheit, Koordinatensystem und mathematischem Symbol für eine eindeutige Darstellung. Der Entwurfs- und Verifikationsprozess für das TUBiX20 Lageregelungssystem wurde vom Autor im Rahmen der Arbeit untersucht. Hier verfolgt der Ansatz einen schrittweisen übergang von einem virtuellen Satelliten als Simulationsmodell bis hin zur Verifikation des integrierten Systems auf einem Lageregelungsteststand. Abschließend diskutiert die Arbeit die Realisierung des untersuchten Konzepts im Rahmen der Missionen TechnoSat und TUBIN. Beginnend mit den jeweiligen Anforderungen wird die Skalierbarkeit des Ansatzes in drei Stufen demonstriert: von einer groben, aber kosten- und energieeffizienten Konfiguration für eine Technologieerprobungsmission mit moderaten Anforderungen (TechnoSat) bis hin zu einer Konfiguration für hochgenaue Lageregelung als Basis für Erdbeobachtungsmissionen (TUBIN)
Longitudinal Data Collection in Continental Europe: Experiences from the Survey of Health, Ageing and Retirement in (SHARE)
No full textCorrigendum to “Integration of hydrogeophysical and geological investigations in enhancing groundwater potential assessment in Houtriver gneiss crystalline basement formation of South Africa” (Physics and Chemistry of the Earth (2021) 123, (S1474706521000425), (10.1016/j.pce.2021.103009))
No full textThe name of the 7th author should be: Karsten H. Jensen. With affiliation: Department of Geosciences and Natural Resource Management, University of Copenhagen, Denmark. The name of the 8th author should be: Karen G. Villholth. The acknowledgement should read: The Authors would like to appreciate and thank the sterling work done by the support provided by the Ministry of Foreign Affairs of Denmark via the Danida Fellowship Centre through providing financial support of the project Enhancing Sustainable Groundwater Use in South Africa (ESGUSA), from which this work was part of. Further to this the authors also acknowledge Department of Water and Sanitation (Polokwane)‘s resource assessment team for equipment and manpower assistance provided during field work. The authors would like to apologise for any inconvenience caused.</p
Coating layer on samples with roughness: numerical study for coherent Fourier scatterometry
No full textFor the development of integrated circuits, the accompanying metrology inside the fabrication process is essential. Non-imaging metrology of nanostructure has to be quick and non-destructive. The multilayers are crucial components of today's microprocessor nanostructures and reflective coatings. Coherent Fourier scatterometry (CFS), which is currently employed as a method for determining certain parameters of nanostructures and isolated particle detection, has not been investigated in the context of multilayer characterization. Retrieving the thickness of many wavelength-thick films using a coherent visible-range source at a full-complex-field measurement is the specific application where CFS might be advantageous. Furthermore, due to polishing in the realistic multilayers, the anticipated optical performance suffers from stochastic changes relating to surface roughness. Few non-imaging metrology methods take into consideration these statistic variances and thus are of interest for this study. Operating in the visible regime, CFS can become a viable candidate to provide cover layer reconstruction in the presence of surface roughness that has a correlation length bigger than the characteristic spot size i.e., in the range of microns. We present forward model results of multilayer structure as measured with visible range CFS modality. The influence of surface roughness is taken into account and the simulation results are discussed. Simulations of micron-sized layers of dielectric on silicon substrate suggest an influence on the far field intensity that motivates a future extended study on experimental multiple wavelength thick cover layer reconstruction in the presence of roughness. ImPhys/Pereira grou
Theorie en toepassingen van titraties volgens de methode van het "dead-stop" eindpunt
No full textApplied Science
- …
