TY - GEN A1 - Schnitzer, Thomas A1 - Edel, Karl-Otto T1 - Fracture mechanical analysis and assessment of the extension of rolling contact fatigue cracks in railway rails N2 - Rolling contact fatigue generates cracks on the running surface of high strength railway rails which grow under a small angle into the rail head. These cracks can cause in its last stage the fracturing of the rail. The crack extension behaviour is – as the origin of these cracks too – influenced by the cold working of the rail steel. The crack growth in the first stage is fracture mechanically analyzed by means of two-dimensional modelling. The simulation results are assessed for the use of rail grinding. A criterion for the change of the crack growth direction could not be derived, but the following stages of the crack growth in the transverse direction and the final fracture and the conditions for secondary fractures are considered. Rolling contact fatigue generates cracks on the running surface of high strength railway rails which grow under a small angle into the rail head. These cracks can cause in its last stage the fracturing of the rail. The crack extension behaviour is – as the origin of these cracks too – influenced by the cold working of the rail steel. The crack growth in the first stage is fracture mechanically analyzed by means of two-dimensional modelling. The simulation results are assessed for the use of rail grinding. A criterion for the change of the crack growth direction could not be derived, but the following stages of the crack growth in the transverse direction and the final fracture and the conditions for secondary fractures are considered. KW - Eisenbahnschiene KW - Schadensmechanik Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus-69 ER - TY - THES A1 - Vera, Roberto T1 - Identification of specialist literature in the security field - Analysis and classification of standard literatureand publishing behavior for security management N2 - The present work researches the existing publications on security management, assesses the relevance of selected literature in relation to corporate security and its subdisciplines and gives some recommendations for the elaboration of prospective security publications. The addressed publications are specialist books, academic journals and specialist magazines. The first part of the work defines the term security management from the perspective of this study in order to find a homogenous scheme, on which the literature research and analysis will be based. The central part of the work assesses the collected publications and determines their relevance with the security management outline defined in this work. The closing part gathers the results of the research and analysis, in order to determine characteristics and shortcomings of the existing literature, and proposes structural improvements for future publications. N2 - Die vorliegende Arbeit recherchiert die bestehenden Veröffentlichungen zum Sicherheitsmanagement, bewertet die Relevanz der ausgewählten Literatur in Bezug auf Unternehmenssicherheit und ihre Teildisziplinen und gibt einige Empfehlungen für die Ausarbeitung künftiger Sicherheitsveröffentlichungen. Die gezielte Publikationen sind Fachbücher, wissenschaftliche Fachzeitschriften und Fachmagazine. Der erste Teil der Arbeit definiert den Begriff Sicherheitsmanagement aus der Perspektive der vorliegenden Studie, um ein einheitliches Schema, auf dem die Literaturrecherche und Analyse beruhen, festzulegen. Der zentrale Teil der Arbeit bewertet die gesammelten Publikationen und bestimmt deren Bedeutung im Sinne des in dieser Arbeit definierten Sicherheitsmanagementaufbaus. Der abschließende Teil sammelt alle Ergebnisse, um Schwachpunkte und Eigenschaften der Literatur zu bestimmen, und gibt strukturelle Vorschläge für künftige Veröffentlichungen. KW - security management KW - security literature analysis KW - literature classification Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus-770 ER - TY - THES A1 - Hartwig, Patrick T1 - Characterization of Physical and Fluid Dynamical Properties of Residual Biomass in Colombia for Gasification in a Fluidized Bed Reactor N2 - Kurzdarstellung Kolumbien ist ein agrarwirtschaftlich geprägtes Land, indem eine Vielzahl verschiedener landwirtschaftlicher Produkte, wie zum Beispiel Zuckerrohr, Kaffee oder Reis, angebaut werden. Durch die jährlich anwachsende Menge an produzierten Gütern steigt auch die jährlich produzierte Menge an landwirtschaftlichen Abfällen, welche Anwendung als erneuerbare Energieträger finden können. Aufgrund der Tatsache, dass es in weiten Teilen Kolumbiens, gerade in den ländlichen agrarwirtschaftlich geprägten Gebieten, Probleme mit der Energieversorgung gibt, könnten die landwirtschaftlichen Abfälle genutzt werden, um vor Ort Energie zu erzeugen und die Entwicklung dieser Regionen zu fördern. Die Forschungsgruppe „Biomass and Optimization of Thermal Systems” (BIOT) der „National University of Colombia“ beschäftigt sich mit genau diesem Thema. In dem Projekt „Efficient Use of Alternative Carbonaceous Fuels in the Power Generation in Colombia by Implementation of Fluidized Bed Reactors” ist geplant, eine zirkulierende Wirbelschichtanlage zur Vergasung von Biomassepartikeln zu konstruieren. Wirbelschichtreaktoren besitzen hervorragende Wärmetransporteigenschaften, sowie gute Partikelkontaktraten, welche notwendig für einen thermochemischen Wandlungsprozess sind [1]. Das Ziel des Projektes ist es zu untersuchen, welche der vor Ort anfallenden landwirtschaftlichen Abfälle effizient genutzt werden können, um Energie durch Vergasungsprozesse unter Anwendung einer Wirbelschichtanlage zu produzieren. Die Auslegung des Wirbelschichtreaktors und die Modellierung des thermochemischen Wandlungsprozesses hängt stark von den physischen und fluiddynamischen Eigenschaften der verwendeten Biomassepartikel ab. Die vorliegende Arbeit beschäftigt sich mit der experimentellen Bestimmung der wesentlichen Eigenschaften der Biomassepartikel. Dazu gehören: die Partikelgrößenverteilung, der mittlere Partikeldurchmesser, die Schütt- und Partikeldichte und der Feuchtigkeitsgehalt. Im Weiteren werden Fluidisierungsversuche mit Mischungen aus Quarzsand, welcher als Bettmaterial dient, und verschiedenen zugeführten Mengen an Biomassepartikeln durchgeführt. Dabei werden die charakteristischen Kenngrößen, wie die Lockerungsgeschwindigkeit, und die Art der Fluidisierung bzw. die Art der sich ausbildenden Schicht experimentell ermittelt, um Erkenntnisse darüber zu erlangen, ob die verschiedenen landwirtschaftlichen Abfälle erfolgreich fluidisiert werden können. Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-18775 CY - Brandenburg an der Havel ER - TY - BOOK A1 - Kraska, Martin T1 - SMath with Maxima BT - Getting Started with the Maxima Plugin KW - SMath KW - Software KW - Maxima Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-29497 PB - Technische Hochschule Brandenburg CY - Brandenburg ER - TY - THES A1 - Runge, Tilman T1 - Dismantling the Quantum Threat N2 - The Quantum Threat looms over cryptography: Once strong quantum computers become available, its game over for encryption and privacy. This widespread understanding of the how cryptography will be impacted by quantum computing is challenged in this thesis to achieve a more nuanced understanding of both the ramifications of the Quantum Threat and potential countermeasures to it. KW - quantum threat KW - q-day KW - Shor KW - Computersicherheit KW - Kryptosystem KW - Datenschutz Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-28889 ER - TY - THES A1 - Kuipers, Tjerk T1 - Developing nuclear security related legislative guarantees in licensing mobile Small Modular Reactors N2 - Goal of the thesis is to research enhancement of the legislative robustness and its possibilities regarding nuclear security of mobile Small Modular Reactors (SMRs) in The Netherlands to improve the licensing process. SMRs are small Nuclear Power Plants (NPPs) with an electrical power output lower than 300 MWe with specific attributes like modularity and mobility, which is beneficial in serial manufacturing, like simplified design features, so fewer components allows for a higher reliability, like passive safety features, which connotes the behavior of components according to known laws of physics, for instance gravity, and like inherent safety features which are defined by reactor characteristics. Chapter 2 reviews the inherent safety and security features of SMRs and its implications on nuclear safety and nuclear security. Chapter 3 deals with the international nuclear regulatory framework and its applicability towards licensing SMRs. Some IAEA Member States have revisioned their legal structure to optimize an SMR licensing process by applying a graded approach towards nuclear security and safety requirements. In Chapter 4 the Dutch nuclear regulatory framework and its impact on SMR developments related to nuclear safety and security are discussed. Suggestions and recommendations for possible legal adjustments are made. Chapter 5 approaches the harmonization of licensing requirements by proposing a more efficient alternative to the Dutch licensing process for all types of NPPs, including SMRs, as presented in international recommendations. Chapter 6 considers the need for SMRs and an alternative approach to the stakeholder involvement in the Dutch NPP licensing process. Generally nuclear regulatory frameworks mainly focus on licensing conventional NPPs and the corresponding nuclear safety and security requirements and therefore prescribing overshooting regulations. Legal options to gradually approach safety and security requirements are deeply embedded in the Dutch Nuclear Energy Act and corresponding legislation. Combined with legal adjustments as denoted in the conclusions and recommendations, the adjustmenst are not only permittable and justifiable but also legally possible. Therefore, the licensing process of SMRs can be streamlined, establishing a harmonized and robust nuclear regulatory framework creating great opportunities for enriching the energy mix in The Netherlands with SMRs. KW - small modular reactor KW - graded approach KW - nuclear security KW - nuclear regulatory framework KW - SMR Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-26627 CY - Brandenburg an der Havel ER - TY - THES A1 - Romao, Cesar T1 - International transport of nuclear material under Brazil responsibility - a model of success N2 - The purpose of this work is to demonstrate how International Transport of Nuclear Material in Brazil is organized, coordinated and executed according to the National Nuclear Security Regime. The country has created a Nuclear Security governance in the Presidency of the Republic Institutional Security Cabinet, which holds a central role in the System for the Protection of the Brazilian Nuclear Program (Sipron, as the acronym in Portuguese), which has recently established the Nuclear Security Coordination in its structure. This new organization enabled the coordination of all national assets involved in the security of nuclear material during transport. Brazil has extensive dimensions; it occupies roughly half of South America, bordering the Atlantic Ocean and all the subcontinent countries except Ecuador and Chile. This continental country presents huge challenges to the ground transportation of any kind in order to reach neighboring countries. Nevertheless, in 2018, a successful nuclear material transport operation to Argentina was coordinated by Sipron within a length of more than 2.000 Km. Nuclear material was delivered from Resende in the State of Rio de Janeiro to Uruguaiana in the State of Rio Grande do Sul in the border with Argentina. This represents an itinerary farther then the distance between Vienna and Moscow. Various security coordination arrangements were necessary before and during the operation. First of all these arrangements were concerned to the identification of all stakeholders roles and responsibilities with the purpose to achieve the necessary synergy in order to perform the operation jointly. The Design and Evaluation Process Outline (DEPO) methodology was applied and the following tasks were accomplished: transportation conveyance characterization; risk and threat assessment with the support of the national intelligence agency; physical protection design according to a defined threat; law enforcement coordination (Federal Police and State Polices); contingency planning; information security measures; personnel clearances; coordination with highway operators; regulatory compliance; activation of the National Command and Control Joint Center and the State Command and Control Joint Centers; synchronization matrix implementation. The operation proved the importance of liaison in all levels, information sharing and cooperation among the responders. However, the principle of confidentiality application became crucial to restrict access to sensitive information to the minimum necessary. Deterrence was largely employed during the operation to minimize risks. The operation has turned into a successful interagency Case Study with many Best Practices and Lessons Learned. KW - nuclear security, nuclear material, international transport Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-26633 ER - TY - THES A1 - Surjanto, Jennifer T1 - Analysis of the Preferences of Younger and Older Indonesian Users Towards the User Interface of Mobile Instant Messaging Applications N2 - In recent years, the messaging application has been Indonesia’s most widely used mobile app. The number of users of these instant messaging (IM) applications has also been increasing constantly. Unfortunately, research has mentioned that older users often face challenges in using them. Although some papers have created guidelines for designing interfaces for the elderly, these applications are still focused on developing according to the need of young people. In addition, the aging of adults increases their chances of facing some difficulties. Therefore, this thesis aims to give a better understanding of the interface of the mobile instant messaging (MIM) application preferred by its users, specifically Indonesian users. By distributing an online-based survey to 150 Indonesian users of the MIM application, the preferences of several features in the message list and messaging interface of this application are collected. Then, the statistical analysis of the results found that the preferences of both users’ age groups differ. Among them are the button or icon each age group finds more suitable, the bottom bar in the messaging interface, and the placement of action options to be performed to the message they prefer most. Thus, this research also presents design recommendations that both younger and older users prefer. KW - Preference KW - Mobile Instant Messaging KW - User Interface KW - Indonesian user KW - Younger user KW - Older user Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-28675 ER - TY - CHAP A1 - Wikarski, Dietmar A1 - Aurah, Catherine A1 - Ebinga Osore, Emmanuel A1 - Mengich, Gladys A1 - Mutua, Gershom A1 - Ndiema, Alice A1 - Nkangi, Felister Nyaera A1 - Ogemah, Vitalis A1 - Okoth, Patrick A1 - Ondulo, Jasper A1 - Orata Omoto, Francis A1 - Wambui Mwangi, Mary A1 - Namayi, Vivian A1 - Flassig, Peter A1 - Loose, Harald A1 - Malessa, Reiner A1 - Piorr, Hans-Peter A1 - Schrader, Thomas A1 - Weber, Christian-Toralf ED - Wikarski, Dietmar T1 - Towards Practice-oriented Higher Education for Sustainable Rural Development in Western Kenya BT - Proceedings of the final workshop of the DAAD funded project ProUniEdu-WeK Brandenburg an der Havel, August 10-12th, 2021 N2 - The workshop proceedings contain the written versions of the presentations of the Kenyan participants of the final workshop of the DAAD-funded cooperation project "Practice-oriented Higher Education in Western Kenya" (ProUniEdu-WeK) in August 2021 at the Brandenburg University of Applied Sciences (THB). The contributions give an impression of what has been achieved in the last years on the way to practice-oriented higher education in the participating departments of the Masinde Muliro University of Science and Technology (MMUST) in cooperation with its partners from the THB and what is planned to be done in the years to come. KW - Manufacturing KW - 3D Printing KW - Additive Manufacturing KW - Bio-slurry KW - Biodigester KW - Biogas KW - CAD/CAM KW - Certification KW - CFD KW - Chronic illnesses KW - Collaboration KW - Communication Strategies KW - Competence KW - Computational Algorithms KW - COVID-19 KW - Cross-Flow Turbine KW - Diagnostic Toolkit KW - Digital Economy KW - Digitalisation KW - E-Health KW - Efficiency KW - Finite Element Method KW - Food Security KW - Health Communication KW - Higher Education KW - IoT KW - Learning Tool KW - Milling KW - Multi-disciplinarity KW - Organic Agriculture KW - Organic Farming KW - Organic Products KW - Pedagogy KW - Programming KW - Prosthetics KW - Prototyping KW - Robotics KW - Rural Areas KW - Rural Community KW - Rural Populations KW - Statistical Analysis KW - Telemedicine Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:522-opus4-27420 PB - Technische Hochschule Brandenburg CY - Brandenburg an der Havel ET - 1st edition ER -