@phdthesis{Zhao,
  author    = {Zhao, Jun-Hua},
  title     = {Multiscale modeling of nanodevices based on carbon nanotubes and polymers},
  doi       = {10.25643/bauhaus-universitaet.2107},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140130-21078},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {175},
  abstract  = {This thesis concerns the physical and mechanical interactions on carbon nanotubes and polymers by multiscale modeling. CNTs have attracted considerable interests in view of their unique mechanical, electronic, thermal, optical and structural properties, which enable them to have many potential applications. Carbon nanotube exists in several structure forms, from individual single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) to carbon nanotube bundles and networks. The mechanical properties of SWCNTs and MWCNTs have been extensively studied by continuum modeling and molecular dynamics (MD) simulations in the past decade since the properties could be important in the CNT-based devices. CNT bundles and networks feature outstanding mechanical performance and hierarchical structures and network topologies, which have been taken as a potential saving-energy material. In the synthesis of nanocomposites, the formation of the CNT bundles and networks is a challenge to remain in understanding how to measure and predict the properties of such large systems. Therefore, a mesoscale method such as a coarse-grained (CG) method should be developed to study the nanomechanical characterization of CNT bundles and networks formation. In this thesis, the main contributions can be written as follows: (1) Explicit solutions for the cohesive energy between carbon nanotubes, graphene and substrates are obtained through continuum modeling of the van der Waals interaction between them. (2) The CG potentials of SWCNTs are established by a molecular mechanics model. (3) The binding energy between two parallel and crossing SWCNTs and MWCNTs is obtained by continuum modeling of the van der Waals interaction between them. Crystalline and amorphous polymers are increasingly used in modern industry as tructural materials due to its important mechanical and physical properties. For crystalline polyethylene (PE), despite its importance and the studies of available MD simulations and continuum models, the link between molecular and continuum descriptions of its mechanical properties is still not well established. For amorphous polymers, the chain length and temperature effect on their elastic and elastic-plastic properties has been reported based on the united-atom (UA) and CG MD imulations in our previous work. However, the effect of the CL and temperature on the failure behavior is not understood well yet. Especially, the failure behavior under shear has been scarcely reported in previous work. Therefore, understanding the molecular origins of macroscopic fracture behavior such as fracture energy is a fundamental scientific challenge. In this thesis, the main contributions can be written as follows: (1) An analytical molecular mechanics model is developed to obtain the size-dependent elastic properties of crystalline PE. (2) We show that the two molecular mechanics models, the stick-spiral and the beam models, predict considerably different mechanical properties of materials based on energy equivalence. The difference between the two models is independent of the materials. (3) The tensile and shear failure behavior dependence on chain length and temperature in amorphous polymers are scrutinized using molecular dynamics simulations. Finally, the influence of polymer wrapped two neighbouring SWNTs' dispersion on their load transfer is investigated by molecular dynamics (MD) simulations, in which the SWNTs' position, the polymer chain length and the temperature on the interaction force is systematically studied.},
  subject      = {Mehrskalenmodell},
  language  = {en}
}
@phdthesis{Wiedemeyer,
  author    = {Wiedemeyer, Nina},
  title     = {Buchfalten: Material Technik Gef{\"u}ge der K{\"u}nstlerb{\"u}cher},
  doi       = {10.25643/bauhaus-universitaet.2333},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20141210-23337},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {215},
  abstract  = {B{\"u}cher werden nicht erst seit ihrer industriellen Produktion aus gefalzten Papierbogen zusammengesetzt - schon mittelalterliche Codices wurden aus gefalteten Pergamenth{\"a}uten konstruiert. Fokus dieser Studie {\"u}ber das Medium Buch ist daher die Kulturtechnik der Faltung. Anders als in der philosophischen Auseinandersetzung mit dem Begriff der Falte, ist die Buchfalte keine anti-lineare Figur, sondern ein operationales Falzscharnier, welches Anordnungen im Buchraum bestimmt und Ornamente hervorbringt. Mediengeschichtliche Fragestellungen sind auf Analysen von Buchmaterial und K{\"u}nstlerb{\"u}chern vom 19. Jahrhundert bis zur Gegenwart basiert. Mit den B{\"u}chern u.a. von Christian Boltanski, Hanne Darboven und Hans-Peter Feldmann werden Erkenntnisse {\"u}ber buchgeschichtliche Zusammenh{\"a}nge gewonnen und das K{\"u}nstlerbuch in eine Geschichte des Mediums Buch eingestellt.},
  subject      = {Buch; Buchkunst; Falte; Ornament; Papier},
  language  = {de}
}
@phdthesis{Wiedemeyer,
  author    = {Wiedemeyer, Nina},
  title     = {Buchfalten: Material Technik Gef{\"u}ge der K{\"u}nstlerb{\"u}cher},
  doi       = {10.25643/bauhaus-universitaet.2252},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140806-22527},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {215},
  abstract  = {B{\"u}cher werden nicht erst seit ihrer industriellen Produktion aus gefalzten Papierbogen zusammengesetzt - schon mittelalterliche Codices wurden aus gefalteten Pergamenth{\"a}uten konstruiert. Fokus dieser Studie {\"u}ber das Medium Buch ist daher die Kulturtechnik der Faltung. Anders als in der philosophischen Auseinandersetzung mit dem Begriff der Falte, ist die Buchfalte keine anti-lineare Figur, sondern ein operationales Falzscharnier, welches Anordnungen im Buchraum bestimmt und Ornamente hervorbringt. Mediengeschichtliche Fragestellungen sind auf Analysen von Buchmaterial und K{\"u}nstlerb{\"u}chern vom 19. Jahrhundert bis zur Gegenwart basiert. Mit den B{\"u}chern u.a. von Christian Boltanski, Hanne Darboven und Hans-Peter Feldmann werden Erkenntnisse {\"u}ber buchgeschichtliche Zusammenh{\"a}nge gewonnen und das K{\"u}nstlerbuch in eine Geschichte des Mediums Buch eingestellt.},
  subject      = {Papier},
  language  = {de}
}
@phdthesis{Wellnitz,
  author    = {Wellnitz, Felix},
  title     = {BAUKLIMATISCHE ERT{\"U}CHTIGUNG UND NACHHALTIGE INSTANDSETZUNG DENKMALGESCH{\"U}TZTER VERWALTUNGSBAUTEN DER 1950er JAHRE AM BEISPIEL DER EHEMALIGEN BAYERISCHEN LANDESVERTRETUNG VON SEP RUF IN BONN},
  doi       = {10.25643/bauhaus-universitaet.2303},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140919-23031},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {172},
  abstract  = {Viele Baudenkmale sind dem Konflikt aus baulichem Instandsetzungsbedarf f{\"u}r eine zeitgem{\"a}ße Nutzung und einer sich m{\"o}glicherweise daraus ergebenden Gef{\"a}hrdung der Denkmalsubstanz ausgesetzt. Gr{\"u}nde sind steigende Energiekosten f{\"u}r den Geb{\"a}udebetrieb, zeitgem{\"a}ße Anforderungen an Behaglichkeit und Arbeitsschutz, sowie die Vermeidung von Sch{\"a}den an der Substanz aufgrund baulicher M{\"a}ngel des konstruktiven W{\"a}rme- und Feuchteschutzes. Gleichzeitig gilt f{\"u}r viele Bauten aber auch die Notwendigkeit regelm{\"a}ßiger Nutzung und Bewirtschaftung, um den Erhalt {\"u}berhaupt zu sichern. Die energetische Ert{\"u}chtigung von Baudenkmalen scheitert in diesem Spannungsfeld oft am unl{\"o}sbaren Konflikt zwischen dem Erhalt der bauzeitlichen Substanz auf der einen und der notwendigen energetischen Optimierung der Geb{\"a}udeh{\"u}lle auf der anderen Seite. Zielsetzung dieser Fallstudie ist die beispielhafte Entwicklung einer bauklimatischen und denkmalgerechten Ert{\"u}chtigungsstrategie am Beispiel eines Verwaltungsgeb{\"a}udes der Nachkriegsmoderne als Beitrag zur L{\"o}sung dieses Konfliktes.},
  subject      = {Denkmalpflege},
  language  = {de}
}
@phdthesis{Walsdorf,
  author    = {Walsdorf, Joern},
  title     = {M-Learning: Lernen im mobilen Kontext an Hochschulen},
  doi       = {10.25643/bauhaus-universitaet.2136},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140304-21361},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  abstract  = {A fundamental characteristic of human beings is the desire to start learning at the moment of birth. The rather formal learning process that learners have to deal with in school, on vocational training or in university, is currently subject to fundamental changes. The increasing technologization, overall existing mobile devices, the ubiquitous access to digital information, and students being early adaptors of all these technological innovations require reactions on the part of the educational system. This study examines such a reaction: The use of mobile learning in higher education. Examining the subject m-learning first requires an investigation of the educational model e-learning. Many universities already established e-learning as one of their educational segments, providing a wide range of methods to support this kind of teaching. This study includes an empirical acceptance analysis regarding the general learning behavior of students and their approval of e-learning methods. A survey on the approval of m-learning supplements the results. Mobile learning is characterized by both the mobility of the communication devices and the users. Both factors lead to new correlations, demonstrate the potential of today's mobile devices and the probability to increase the learning performance. The dissertation addresses these correlations and the use of mobile devices in the context of m-learning. M-learning and the usage of mobile devices not only require a reflection from a technological point of view. In addition to the technical features of such mobile devices, the usability of their applications plays an important role, especially with regard to the limited display size. For the purpose of evaluating mobile apps and browser-based applications, various analytical methods are suitable. The concluding heuristic evaluation points out the vulnerability of an established m-learning application, reveals the need for improvement, and shows an approach to rectify the shortcoming.},
  subject      = {Mobile Learning},
  language  = {de}
}
@phdthesis{Torrado,
  author    = {Torrado, Valentina},
  title     = {Die Pr{\"a}senz des Abjekten in der zeitgen{\"o}ssischen Kunstproduktion},
  doi       = {10.25643/bauhaus-universitaet.2129},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140225-21297},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {115},
  abstract  = {Die Arbeit fokussiert die Rolle des Abjekten in der zeitgen{\"o}ssischen Kunst und hier insbesondere die Rolle der K{\"u}nstler aus den wohlhabenden - sogenannten postindustriellen - L{\"a}ndern. Die Arbeit mit abjekten Themen in der Kunstproduktion ist sehr pr{\"a}sent, jedoch aus einer anderen, eher individualistischen Perspektive. Die wichtigsten Orte der Kunst (Galerien, Museen, Kulturzentren) sind R{\"a}ume der Legitimation dieser Art von Produktion, dabei wird das Potential der Provokation hinterfragt. Die klassische Avantgarde, besonders der Dadaismus, hat das Abjekte zu Beginn des 20. Jahrhunderts als k{\"u}nstlerisches Material genutzt. Das Spiel mit Grenz{\"u}berschreitungen durch die Darstellung des Verbotenen und Ekelerregenden machte das Abjekte zur produktiven Kraft auch auf sozialer Ebene, weil es als Mittel dem gesellschaftlichen Protest und der sozialen Kritik diente.},
  subject      = {Abjekt},
  language  = {de}
}
@phdthesis{Nowottny,
  author    = {Nowottny, Vera},
  title     = {Die Camera Obscura als Kondensationsmobil : Der Weg von der formalen {\"A}sthetik in der Fotografie bis hin zum k{\"u}nstlerischen Akt des Atmens},
  doi       = {10.25643/bauhaus-universitaet.2312},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20141014-23123},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {143},
  abstract  = {{\"U}ber die formale {\"A}sthetik der Aufl{\"o}sung in der Fotografie bis hin zum k{\"u}nstlerischen Akt des Atmens},
  subject      = {Camera Obscura},
  language  = {de}
}
@phdthesis{Nayono,
  author    = {Nayono, Suwartanti},
  title     = {Development of a Sustainability-based Sanitation Planning Tool (SusTA) for Developing Countries},
  doi       = {10.25643/bauhaus-universitaet.2222},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140619-22227},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {153; mit Anh{\"a}ngen 209},
  abstract  = {Background and Research Goal Despite all the efforts in the sanitation sector, it is acknowledged that the world is not on track to meet the MDG sanitation target to reduce the number of people without access to sanitation by 2015. Furthermore, a large number of existing sanitation facilities in developing countries is out of order. This leads to the conclusion that, besides technical failures, the planning process in the sanitation sector was ineffective. This ineffectiveness may be attributed to the lack of knowledge of the sanitation planners about the local conditions of the sanitation project. In addition, sustainability of a technology is often approached from a fragmented perspective that often leads to an unsustainable solution. The dissertation is conducted within the framework of the Integrated Water Resources Management (IWRM) Indonesia project. The goal of this work is to contribute to the development of a methodology of a planning tool for sustainable sanitation technology. The tool is designed for sanitation planners in developing countries, where a top-down planning approach is common practice. The proposed tool enables comprehensive sustainability assessments (using the Helmholtz Concept of Sustainability as reference), taking into account local conditions. State of the Science In the planning practice, many sanitation planning tools focus on technology selection. However, it has become evident that the selection criteria for sustainable technologies are not always considered in the tools' framework. In other cases, when the criteria are provided by the tool, there is no clear indication of the conditions to be fulfilled in order to meet these criteria. Specifically, there is no reference to what is meant by sustainable technology in a particular context and how to comprehensively assess the sustainability of different technology options. Research Methodology Developing a planning tool is an empirical process, combining theory and practical experience. Hence, the development process of such a tool requires extensive observations, particularly on the interaction between stakeholders in the sanitation sector as well as between technology and its environment. For this purpose, a case study within the project area was carried out. Pucanganom, a village representing common strategic problems in developing countries (e.g. top-down planning approaches, lack of involvement of beneficiaries in the planning process, lack of sustainability assessments) was finally selected as the case study area. After the in-depth case study, an analytical generalisation was developed to enable the tool's application to a broader context. Results The result of this research is a new tool - the Sustainability-based Sanitation Planning Tool (SusTA). SusTA enables comprehensive sustainability assessment in its five generic steps, namely: (1) analysis of stakeholders and sanitation policy in the region, (2) distance-to-target analysis on sanitation conditions in the region, (3) examination of physical and socio-economic conditions in the project area, (4) contextualisation of the technology assessment process in the project area, and (5) sustainability-oriented technology assessment at the project level. These steps are conducted at two levels of planning - the region and the project area - in order to identify the specific problems and interests which influence the selection of a sanitation system. Each planning step is equipped with tool elements (e.g. set of indicators, household questionnaires, technology assessment matrices) to support the analysis. From the development of SusTA, it can be concluded that four elements are required for an effective and widely applicable sanitation planning tool: sustainability concept, participatory approach, contextualisation framework and modification framework. SusTA provides both a theoretical and a practical basis for assessing the sustainability of sanitation technologies in developing countries. The tool's main advantages for decision makers in these countries are: It is simple and transparent in its steps, does not require vast amounts of data and does not need a sophisticated computer program.},
  subject      = {sanitation planning, sustainable technology, sustainability assessment},
  language  = {en}
}
@phdthesis{Mai,
  author    = {Mai, Luu},
  title     = {Structural Control Systems in High-speed Railway Bridges},
  issn      = {1610-7381},
  doi       = {10.25643/bauhaus-universitaet.2339},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20141223-23391},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {147},
  abstract  = {Structural vibration control of high-speed railway bridges using tuned mass dampers, semi-active tuned mass dampers, fluid viscous dampers and magnetorheological dampers to reduce resonant structural vibrations is studied. In this work, the addressed main issues include modeling of the dynamic interaction of the structures, optimization of the parameters of the dampers and comparison of their efficiency. A new approach to optimize multiple tuned mass damper systems on an uncertain model is proposed based on the H-infinity optimization criteria and the DK iteration procedure with norm-bounded uncertainties in frequency domain. The parameters of tuned mass dampers are optimized directly and simultaneously on different modes contributing significantly to the multi-resonant peaks to explore the different possible combinations of parameters. The effectiveness of the present method is also evaluated through comparison with a previous method. In the case of semi-active tuned mass dampers, an optimization algorithm is derived to control the magnetorheological damper in these semi-active damping systems. The use of the proposed algorithm can generate various combinations of control gains and state variables. This can lead to the improvement of the ability of MR dampers to track the desired control forces. An uncertain model to reduce detuning effects is also considered in this work. Next, for fluid viscous dampers, in order to tune the optimal parameters of fluid viscous dampers to the vicinity of the exact values, analytical formulae which can include structural damping are developed based on the perturbation method. The proposed formulae can also be considered as an improvement of the previous analytical formulae, especially for bridge beams with large structural damping. Finally, a new combination of magnetorheological dampers and a double-beam system to improve the performance of the primary structure vibration is proposed. An algorithm to control magnetorheological dampers in this system is developed by using standard linear matrix inequality techniques. Weight functions as a loop shaping procedure are also introduced in the feedback controllers to improve the tracking ability of magnetorheological damping forces. To this end, the effectiveness of magnetorheological dampers controlled by the proposed scheme, along with the effects of the uncertain and time-delay parameters on the models, are evaluated through numerical simulations. Additionally, a comparison of the dampers based on their performance is also considered in this work.},
  subject      = {High-speed railway bridge},
  language  = {en}
}
@phdthesis{Kalugila,
  author    = {Kalugila, Shubira},
  title     = {HOUSING INTERVENTIONS AND ITS INFLUENCE ON URBAN DEVELOPMENT: Opportunities and Challenges in Mixed Informal Settlements, in Dar es Salaam - Tanzania},
  doi       = {10.25643/bauhaus-universitaet.2293},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140902-22930},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {304},
  abstract  = {Rapid urbanisation that is not accompanied by socio-economic development strains the capacity of local and national governments to provide even basic services such as shelter. Informal settlements i.e. settlements not built or developed according to the formal regulations have become a solution to many urban dwellers in developing countries. In Tanzania informal settlements accommodate people from low, middle and high income groups. The study explores the nature of potentials and challenges posed by the existence of mixed socio-economic groups in informal settlements, including an assessment of what can be done to optimise utilisation of potentials and mitigation of conflicts. Using a case study strategy, the study was conducted in Dar es Salaam city focusing on Makongo mixed informal settlement. The results show that mixed informal settlements are as a result of several factors including uncoordinated energies of people. The urban development forces that bring change in the development of the city are stronger than the public states capacity to coordinate and manage them. Informal settlements also offer user-friendly land tenure, flexibility in house construction and proximity to livelihoods. Other factors include the nature of socio-economic living patterns and extension of urban boundaries. Community members operate using social norms. Advantages of mixed informal settlements include availability of plots according to needs and affordability while a disadvantage is, people of different socio-economic groups perceive problems differently. For policies to be effective, their formulation should be derived from what is happening on the ground i.e. addressing informal settlements according to their heterogeneity. Moreover, empowered local authorities can assist in implementing national development plans; also actors in land development including government institutions, non-governmental institutions, financial institutions, private sector, professionals, political leaders, research institutions, policy-makers and training institutions need to recognise, understand and respect each other's roles, and pull resources together to minimise problems related to informality in land development; utilise potentials and minimise challenges in mixed informal settlements in Dar es Salaam. Key words: Informal settlements, land development, urbanisation},
  subject      = {Verst{\"a}dterung},
  language  = {en}
}