@inproceedings{WiggenbrockSmarsly,
  author    = {Wiggenbrock, Jens and Smarsly, Kay},
  title     = {A GENERIC FRAMEWORK SUPPORTING DISTRIBUTED COMPUTING IN ENGINEERING APPLICATIONS},
  series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  editor    = {G{\"u}rlebeck, Klaus and Lahmer, Tom},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  issn      = {1611-4086},
  doi       = {10.25643/bauhaus-universitaet.2826},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28260},
  pages     = {9},
  abstract  = {Modern distributed engineering applications are based on complex systems consisting of various subsystems that are connected through the Internet. Communication and collaboration within an entire system requires reliable and efficient data exchange between the subsystems. Middleware developed within the web evolution during the past years provides reliable and efficient data exchange for web applications, which can be adopted for solving the data exchange problems in distributed engineering applications. This paper presents a generic approach for reliable and efficient data exchange between engineering devices using existing middleware known from web applications. Different existing middleware is examined with respect to the suitability in engineering applications. In this paper, a suitable middleware is shown and a prototype implementation simulating distributed wind farm control is presented and validated using several performance measurements.},
  subject      = {Angewandte Informatik},
  language  = {en}
}
@phdthesis{Sowoidnich,
  author    = {Sowoidnich, Thomas},
  title     = {A Study of Retarding Effects on Cement and Tricalcium Silicate Hydration induced by Superplasticizers},
  isbn      = {978-3-00-052204-8},
  doi       = {10.25643/bauhaus-universitaet.2544},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160224-25444},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {214},
  abstract  = {Fließmittel werden in Betonen verwendet, um deren Fließeigenschaften w{\"a}hrend der Verarbeitung zu verbessern und Wasser einzusparen. Beide Faktoren beeinflussen nicht nur den Frischbeton, sondern auch signifikant die Festbetoneigenschaften. Nachteilig wirken sich Fließmittel auf die Festigkeitsentwicklung aus, die z.T. sehr stark verz{\"o}gert wird. Dies ist vor allem bei Bauteilen, die im Rahmen eines Vorfertigungsprozesses hergestellt werden, ein {\"o}konomischer Nachteil. Die vorliegende Arbeit widmet sich den Ursachen f{\"u}r die Verz{\"o}gerung der Portlandzementhydratation bei Verwendung von Fließmitteln. Um die komplexen Reaktionen, die w{\"a}hrend der Portlandzementhydratation auftreten, zu vereinfachen, betrachtet ein {\"u}berwiegender Teil der Arbeit die Wechselwirkung Fließmittel-Tricalciumsilikat (Abk. Ca3SiO5 oder C3S, Hauptbestandteil von Portlandzementklinker). Die Untersuchungen werden in drei Hauptteilen durchgef{\"u}hrt, wobei Methoden wie u.a. isotherme W{\"a}rmeflusskalorimetrie, Elektrische Leitf{\"a}higkeit, Elektronenmikroskopie, ICP-OES, TOC als auch Analytische Ultrazentrifugation Anwendung finden. Basierend auf der Wechselwirkung von Kationen mit anionischen Ladungstr{\"a}gern von Polymeren wird die Interaktion von Calcium mit Fließmitteln im ersten Teil der Arbeit untersucht. Dabei kommt es {\"u}berwiegend zur Komplexierung von Calciumionen durch die funktionellen Gruppen der Plymere (Carboxyl- bzw. Sulfonguppen), die in zement{\"a}ren Umgebungen sowohl gel{\"o}st in der w{\"a}ssrigen Phase als auch als Bestandteil von Partikelgrenzfl{\"a}chen vorhanden sind. Neben diesen Effekten kann auch gezeigt werden, dass Fließmittel die Bildung von nanoskaligen Partikeln hervorrufen, die infolge der sterischen Wirkung von Fließmitteln dispergiert in der w{\"a}ssrigen Phase vorliegen (Clusterbildung). Analog zu neuesten Erkenntnissen aus dem Bereich der Biomineralisation ist daher davon auszugehen, dass diese Nanopartikel durch Agglomeration das Kristallwachtsum beeinflussen. Ausgehend von der Annahme, dass die Aufl{\"o}sungs- und/ oder F{\"a}llungskinetik durch die Wirkung von Fließmitteln behindert und damit f{\"u}r den Verz{\"o}gerungseffekt der Fließmittel w{\"a}hrend der komplexen Hydratationsreaktion verantwortlich seien k{\"o}nnen, werden die zugrundeliegenden Vorg{\"a}nge im zweiten Abschnitt getrennt voneinander untersucht. Es wird anhand von L{\"o}sungsuntersuchungen an C-S-H Phasen und Portlandit herausgestellt, dass die Komplexierung von gel{\"o}sten Calciumionen durch funktionelle Gruppen der Polymere die L{\"o}slichkeit von Portlandit erh{\"o}ht. Im Gegensatz f{\"u}hrt die Komplexierung von Calciumionen in der w{\"a}ssrigen Phase zu einer Verringerung der Calciumionenkonzentration in der w{\"a}ssrigen Phase. Diese Effekte werden auf die unterschiedlich starke Adsorptionsneigung der Polymere an C-S-H-Phasen und Portlandit zur{\"u}ckgef{\"u}hrt. Es wird davon ausgegangen, dass die Adsorption aufgrund der gr{\"o}ßeren spezifischen Oberfl{\"a}che st{\"a}rker an den C-S-H-Phasen als am Portlandit auftritt. Demnach stellt sich dar, dass die Polymere erst nachdem die funktionellen Gruppen Calciumionen aus der w{\"a}ssrigen Phase komplexiert haben an den C-S-H-Phasen adsorbieren. Weiterhin kann gezeigt werden, dass die freie C3S Aufl{\"o}sungsrate in Anwesenheit von Fließmitteln keinen direkten Zusammenhang zur Verz{\"o}gerung erkennen l{\"a}sst. Teilweise kommt es zu einer in Bezug zur Kontrollprobe ohne Fließmittel erh{\"o}hten sowie auch verringerten Aufl{\"o}sungsrate. Wird das Komplexierungsvem{\"o}gen der Fließmittel ber{\"u}cksichtigt, so kann durchaus eine verlangsamte freie Aufl{\"o}sungsrate ermittelt werden. Doch auch Calcit zeigt einen verz{\"o}gernden Einfluss auf die freie C3S Aufl{\"o}sung, obwohl es den Gesamtprozess der Hydratation signifikant beschleunigt. Somit kann die behinderte Aufl{\"o}sung als m{\"o}gliche Ursache f{\"u}r die verz{\"o}gernde Wirkung w{\"a}hrend der Zementhydratation weder best{\"a}tigt noch widerlegt werden. Dieser Punkt sollte in zuk{\"u}nftigen Arbeiten weiter untersucht werden. Im letzten Schritt dieses Untersuchungsabschnitts wird die reine Kristallisation von C-S-H-Phasen und Portlandit untersucht. Es stellt sich heraus, dass Fließmittel insbesondere durch die Wirkung der Komplexierung von Ionen in der w{\"a}ssrigen Phase sowohl die Induktionszeit verl{\"a}ngern als auch die Kristallwachstumsrate ver{\"a}ndern. Dies allein kann aber nicht die komplette Verz{\"o}gerungswirkung erkl{\"a}ren. Ein wichtiger Verz{\"o}gerungsfaktor ist die Adsorption der Polymere an Kristalloberfl{\"a}chen als auch eine fließmittelbedingte Dispergierung von nanoskaligen Einzelpartikeln, die deren Agglomeration zu Kristallen behindert. Im letzten Hauptuntersuchungsabschnitt werden die gewonnenen Erkenntnisse auf die w{\"a}hrend der Zement- und Tricalciumsilikathydratation parallel ablaufenden Reaktionen analysiert. Dabei wird insbesondere die ionische Zusammensetzung der w{\"a}ssrigen Phase von C3S Pasten und Suspensionen untersucht, um Hinweise f{\"u}r eine kinetische Hemmung der Hydratationsreaktion zu identifizieren. Zusammenfassend wird festgestellt, dass die Ursachen der verz{\"o}gernden Wirkung von Fließmitteln auf die Hydratation von C3S auf die starke Verz{\"o}gerung der Kristallisation von Hydratphasen zur{\"u}ckzuf{\"u}hren ist. Dabei kommt den zwei Faktoren Komplexierung von Calciumionen an Oberfl{\"a}chen und Stabilisierung von nanoskaligen Partikeln eine zentrale Bedeutung zu. Diese Effekte k{\"o}nnen durch die Wirkung als Templat als auch durch Erh{\"o}hung der L{\"o}slichkeit infolge Komplexierung freier/gel{\"o}ster Ionen teilkompensiert werden. Dass die Aufl{\"o}sungsreaktion durch die Anwesenheit von Fließmitteln behindert wird, kann nur indirekt anhand der Entwicklung von Ionenkonzentrationen festgestellt werden. Ob dieser Vorgang die Ursache oder die Folge des L{\"o}sungs-F{\"a}llungs-Mechanismus der Hydratation ist und damit die verz{\"o}gernde Wirkung durch behinderte Aufl{\"o}sung des Edukts hervorgerufen wird, bleibt Gegenstand weiterer Untersuchungen. Im Rahmen der Arbeit kann auch gezeigt werden, dass Fließmittel chemisch als Inhibitoren wirken indem sie den Frequenzfaktor verringern. Dar{\"u}ber hinaus wird erstmalig eine Methode entwickelt, die die Bestimmung der Ionenkonzentration in Pasten in-situ erlaubt. Mit deren Hilfe wird dargestellt, dass die Entwicklung der Ionenkonzentration als auch die allgemein verwendete W{\"a}rmefreisetzungsrate (Kalorimetrie) miteinander korrespondiert. Dar{\"u}ber hinaus erlaubt die entwickelte Methode die weitere Differenzierung der Accelerationsperiode in drei Stadien. Die Kristallisation von C-S-H-Phasen und Portlandit ist f{\"u}r den Beginn der Haupthydratationsperiode entscheidend.},
  subject      = {Cement},
  language  = {en}
}
@inproceedings{Beese,
  author    = {Beese, Christine},
  title     = {About the Internationality of Urbanism: The Influence of International Town Planning Ideas upon Marcello Piacentini's Work},
  series = {Urban design and dictatorship in the 20th century: Italy, Portugal, the Soviet Union, Spain and Germany. History and Historiography},
  booktitle = {Urban design and dictatorship in the 20th century: Italy, Portugal, the Soviet Union, Spain and Germany. History and Historiography},
  doi       = {10.25643/bauhaus-universitaet.2409},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150619-24093},
  pages     = {1 -- 22},
  abstract  = {Beitr{\"a}ge zum Symposium „Urban design and dictatorship in the 20th century: Italy, Portugal, the Soviet Union, Spain and Germany. History and Historiography". Weimar, 21.-22. November 2013},
  subject      = {St{\"a}dtebau},
  language  = {en}
}
@phdthesis{Budarapu,
  author    = {Budarapu, Pattabhi Ramaiah},
  title     = {Adaptive multiscale methods for fracture},
  doi       = {10.25643/bauhaus-universitaet.2391},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150507-23918},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  abstract  = {One major research focus in the Material Science and Engineering Community in the past decade has been to obtain a more fundamental understanding on the phenomenon 'material failure'. Such an understanding is critical for engineers and scientists developing new materials with higher strength and toughness, developing robust designs against failure, or for those concerned with an accurate estimate of a component's design life. Defects like cracks and dislocations evolve at nano scales and influence the macroscopic properties such as strength, toughness and ductility of a material. In engineering applications, the global response of the system is often governed by the behaviour at the smaller length scales. Hence, the sub-scale behaviour must be computed accurately for good predictions of the full scale behaviour. Molecular Dynamics (MD) simulations promise to reveal the fundamental mechanics of material failure by modeling the atom to atom interactions. Since the atomistic dimensions are of the order of Angstroms ( A), approximately 85 billion atoms are required to model a 1 micro- m^3 volume of Copper. Therefore, pure atomistic models are prohibitively expensive with everyday engineering computations involving macroscopic cracks and shear bands, which are much larger than the atomistic length and time scales. To reduce the computational effort, multiscale methods are required, which are able to couple a continuum description of the structure with an atomistic description. In such paradigms, cracks and dislocations are explicitly modeled at the atomistic scale, whilst a self-consistent continuum model elsewhere. Many multiscale methods for fracture are developed for "fictitious" materials based on "simple" potentials such as the Lennard-Jones potential. Moreover, multiscale methods for evolving cracks are rare. Efficient methods to coarse grain the fine scale defects are missing. However, the existing multiscale methods for fracture do not adaptively adjust the fine scale domain as the crack propagates. Most methods, therefore only "enlarge" the fine scale domain and therefore drastically increase computational cost. Adaptive adjustment requires the fine scale domain to be refined and coarsened. One of the major difficulties in multiscale methods for fracture is to up-scale fracture related material information from the fine scale to the coarse scale, in particular for complex crack problems. Most of the existing approaches therefore were applied to examples with comparatively few macroscopic cracks. Key contributions The bridging scale method is enhanced using the phantom node method so that cracks can be modeled at the coarse scale. To ensure self-consistency in the bulk, a virtual atom cluster is devised providing the response of the intact material at the coarse scale. A molecular statics model is employed in the fine scale where crack propagation is modeled by naturally breaking the bonds. The fine scale and coarse scale models are coupled by enforcing the displacement boundary conditions on the ghost atoms. An energy criterion is used to detect the crack tip location. Adaptive refinement and coarsening schemes are developed and implemented during the crack propagation. The results were observed to be in excellent agreement with the pure atomistic simulations. The developed multiscale method is one of the first adaptive multiscale method for fracture. A robust and simple three dimensional coarse graining technique to convert a given atomistic region into an equivalent coarse region, in the context of multiscale fracture has been developed. The developed method is the first of its kind. The developed coarse graining technique can be applied to identify and upscale the defects like: cracks, dislocations and shear bands. The current method has been applied to estimate the equivalent coarse scale models of several complex fracture patterns arrived from the pure atomistic simulations. The upscaled fracture pattern agree well with the actual fracture pattern. The error in the potential energy of the pure atomistic and the coarse grained model was observed to be acceptable. A first novel meshless adaptive multiscale method for fracture has been developed. The phantom node method is replaced by a meshless differential reproducing kernel particle method. The differential reproducing kernel particle method is comparatively more expensive but allows for a more "natural" coupling between the two scales due to the meshless interpolation functions. The higher order continuity is also beneficial. The centro symmetry parameter is used to detect the crack tip location. The developed multiscale method is employed to study the complex crack propagation. Results based on the meshless adaptive multiscale method were observed to be in excellent agreement with the pure atomistic simulations. The developed multiscale methods are applied to study the fracture in practical materials like Graphene and Graphene on Silicon surface. The bond stretching and the bond reorientation were observed to be the net mechanisms of the crack growth in Graphene. The influence of time step on the crack propagation was studied using two different time steps. Pure atomistic simulations of fracture in Graphene on Silicon surface are presented. Details of the three dimensional multiscale method to study the fracture in Graphene on Silicon surface are discussed.},
  subject      = {Material},
  language  = {en}
}
@phdthesis{Riehmann,
  author    = {Riehmann, Patrick},
  title     = {Advanced Visual Interfaces for Informed Decision-Making},
  publisher = {Patrick Riehmann},
  doi       = {10.25643/bauhaus-universitaet.2454},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150907-24542},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {132},
  abstract  = {This thesis presents new interactive visualization techniques and systems intended to support users with real-world decisions such as selecting a product from a large variety of similar offerings, finding appropriate wording as a non-native speaker, and assessing an alleged case of plagiarism. The Product Explorer is a significantly improved interactive Parallel Coordinates display for facilitating the product selection process in cases where many attributes and numerous alternatives have to be considered. A novel visual representation for categorical and ordered data with only few occurring values, the so-called extended areas, in combination with cubic curves for connecting the parallel axes, are crucial for providing an effective overview of the entire dataset and to facilitate the tracing of individual products. The visual query interface supports users in quickly narrowing down the product search to a small subset or even a single product. The scalability of the approach towards a large number of attributes and products is enhanced by the possibility of setting some constraints on final attributes and, therefore, reducing the number of considered attributes and data items. Furthermore, an attribute repository allows users to focus on the most important attributes at first and to bring in additional criteria for product selection later in the decision process. A user study confirmed that the Product Explorer is indeed an excellent tool for its intended purpose for casual users. The Wordgraph is a layered graph visualization for the interactive exploration of search results for complex keywords-in-context queries. The system relies on the Netspeak web service and is designed to support non-native speakers in finding customary phrases. Uncertainties about the commonness of phrases are expressed with the help of wildcard-based queries. The visualization presents the alternatives for the wildcards in a multi-column layout: one column per wildcard with the other query fragments in between. The Wordgraph visualization displays the sorted results for all wildcards at once by appropriately arranging the words of each column. A user study confirmed that this is a significant advantage over simple textual result lists. Furthermore, visual interfaces to filter, navigate, and expand the graph allow interactive refinement and expansion of wildcard-containing queries. Furthermore, this thesis presents an advanced visual analysis tool for assessing and presenting alleged cases of plagiarism and provides a three-level approach for exploring the so-called finding spots in their context. The overview shows the relationship of the entire suspicious document to the set of source documents. An intermediate glyph-based view reveals the structural and textual differences and similarities of a set of finding spots and their corresponding source text fragments. Eventually, the actual fragments of the finding spot can be shown in a side-by-side view with a novel structured wrapping of both the source, as well as the suspicious text. The three different levels of detail are tied together by versatile navigation and selection operations. Reviews with plagiarism experts confirm that this tool can effectively support their workflow and provides a significant improvement over existing static visualizations for assessing and presenting plagiarism cases. The three main contributions of this research have a lot in common aside from being carefully designed and scientifically grounded solutions to real-world decision problems. The first two visualizations facilitate the decision for a single possibility out of many alternatives, whereas the latter ones deal with text at varying levels of detail. All visual representations are clearly structured based on horizontal and vertical layers contained in a single view and they all employ edges for depicting the most important relationships between attributes, words, or different levels of detail. A detailed analysis considering the context of the established decision-making literature reveals that important steps of common decision models are well-supported by the three visualization systems presented in this thesis.},
  subject      = {Informatik},
  language  = {en}
}
@misc{Damanik,
  type      = {Master Thesis},
  author    = {Damanik, Batta Septo Van Bahtiar},
  title     = {Aerodynamic Analysis of Slender Vertical Structure and Response Control with Tuned Mass Damper},
  doi       = {10.25643/bauhaus-universitaet.2471},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20151030-24714},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  abstract  = {Analysis of vortex induced vibration has gained more interest in practical held of civil engineering. The phenomenon often occurs in long and slender vertical structure like high rise building, tower, chimney or bridge pylon, which resulting in unfavorable responses and might lead to the collapse of the structures. The phenomenon appears when frequency of vortex shedding produced in the wake area of body meet the natural frequency of the structure. Even though this phenomenon does not necessarily generate a divergent amplitude response, the structure still may fail due to fatigue damage. To reduce the effect of vortex induced vibration, engineers widely use passive vibration response control system. In this case, the thesis studies the effect of tuned mass damper. The objective of this thesis is to simulate the effect of tuned mass damper in reducing unfavorable responses due to vortex induced vibration and initiated by numerical model validation with respect to wind tunnel test report. The reference structure that being used inside the thesis is Stonecutter Bridge, Hongkong. A numerical solver for computational uid dynamics named VX ow which developed by Morgenthal [6] is utilized for wind and structure simulation. The comparison between numerical model and wind tunnel result shows 10\% maximum tip displacement diference in the model of full erection freestanding tower. The tuned mass damper (TMD) model itself built separately in finite element software SOFiSTiK, and the efective damping obtained from this model then applied inside input modal data of VX ow simulation. A single TMD with mass ratio of TMD 0.5\% to the mass of first bending frequency, the maximum tip displacement is measured to be average 67\% reduced. Considering construction limitation and robustness of TMD, the effects of multiple TMD inside a structure are also studied. An uncoupled procedure of applying aeroelastic loads obtained from VX ow inside finite element software SOFiSTiK is also done to observe the optimum distribution and optimum mass ratio of multiple tuned mass damper. The rest of the properties of TMD are calculated with Den Hartog's formula. The results are as follows: peak displacement in the case of multiple TMD that distributed with polynomial spacing achieve 7.8\% more reduction performance than the one that distributed with equal spacing. Optimum mass of tuned mass damper achieved with ratio 1.25\% mass of first bending frequency corresponds to across wind direction.},
  subject      = {Aerodynamic},
  language  = {en}
}
@techreport{SchwanckRuiz,
  author    = {Schwanck, Anke and Ruiz, Marcelo},
  title     = {Allokation und Steuerung von Fl{\"a}chenressourcen in Hochschulen (FLHO)},
  organization    = {Bauhaus-Universit{\"a}t Weimar, Fakult{\"a}t Bauingenieurwesen, Professur Betriebswirtschaftslehre im Bauwesen},
  isbn      = {978-3-95773-188-3},
  doi       = {10.25643/bauhaus-universitaet.2357},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150227-23570},
  pages     = {491},
  abstract  = {Generell hat sich im Forschungsprojekt insbesondere durch die Gespr{\"a}che mit den Hochschulvertretern best{\"a}tigt, dass f{\"u}r qualitativ hochwertige Lehre und Forschung qualitativ hochwertige Fl{\"a}chen in ausreichendem Umfang notwendig sind. Ein Ziel der Forschungsarbeit ist die Entwicklung von Modellen zur Allokation und Steuerung von Fl{\"a}chenressourcen in Hochschulen. Ausgehend von Darstellungen und Erfahrungen f{\"u}r die Fl{\"a}chensteuerung aus Unternehmen, anderen Bereichen der {\"o}ffentlichen Verwaltung und Forschungseinrichtungen wurden m{\"o}gliche Steuerungsverfahren f{\"u}r Hochschulen untersucht. Es wurde ein Steuerungsmodell f{\"u}r Hochschulen entwickelt, das auf die hochschulinternen und die extern wirksamen Rahmenbedingungen reagiert. Die hochschulinterne Fl{\"a}chenallokation wird zum einen maßgeblich von externen Rahmen-bedingungen und zum zweiten von internen Prozessen, Abl{\"a}ufen und Strukturen beeinflusst. Die Kenntnis dieser Bedingungen wird als Voraussetzung f{\"u}r die Benennung von Erfolgsfak-toren f{\"u}r die Implementation neuer Steuerungsmodelle angenommen. Analysiert wurden daher die liegenschaftspolitischen und die organisatorischen Rahmenbedingungen sowie die steuerungsrelevanten Eigenschaften der Fl{\"a}chen selber.},
  subject      = {Fl{\"a}che},
  language  = {de}
}
@inproceedings{NasirBargstaedt,
  author    = {Nasir, A.R. and Bargst{\"a}dt, Hans-Joachim},
  title     = {AMELIORATING EMPLOYABILITY IN CONSTRUCTION THROUGH BIM INNOVATION},
  series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  editor    = {G{\"u}rlebeck, Klaus and Lahmer, Tom},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  issn      = {1611-4086},
  doi       = {10.25643/bauhaus-universitaet.2815},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28157},
  pages     = {6},
  abstract  = {Low-skilled labor makes a significant part of the construction sector, performing daily production tasks that do not require specific technical knowledge or confirmed skills. Today, construction market demands increasing skill levels. Many jobs that were once considered to be undertaken by low or un-skilled labor, now demand some kind of formal skills. The jobs that require low skilled labor are continually decreasing due to technological advancement and globalization. Jobs that previously required little or no training now require skilful people to perform the tasks appropriately. The study aims at ameliorating employability of less skilled manpower by finding ways to instruct them for performing constructions tasks. A review of exiting task instruction methodologies in construction and the underlying gaps within them warrants an appropriate way to train and instruct low skilled workers for the tasks in construction. The idea is to ensure the required quality of construction with technological and didactic aids seeming particularly purposeful to prepare potential workers for the tasks in construction without exposing them to existing communication barriers. A BIM based technology is considered promising along with the integration of visual directives/animations to elaborate the construction tasks scheduled to be carried on site.},
  subject      = {Angewandte Informatik},
  language  = {en}
}
@phdthesis{Forler,
  author    = {Forler, Christian},
  title     = {Analysis Design \& Applications of Cryptographic Building Blocks},
  publisher = {Shaker Verlag},
  doi       = {10.25643/bauhaus-universitaet.2376},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150330-23764},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {213},
  abstract  = {This thesis deals with the basic design and rigorous analysis of cryptographic schemes and primitives, especially of authenticated encryption schemes, hash functions, and password-hashing schemes. In the last decade, security issues such as the PS3 jailbreak demonstrate that common security notions are rather restrictive, and it seems that they do not model the real world adequately. As a result, in the first part of this work, we introduce a less restrictive security model that is closer to reality. In this model it turned out that existing (on-line) authenticated encryption schemes cannot longer beconsidered secure, i.e. they can guarantee neither data privacy nor data integrity. Therefore, we present two novel authenticated encryption scheme, namely COFFE and McOE, which are not only secure in the standard model but also reasonably secure in our generalized security model, i.e. both preserve full data inegrity. In addition, McOE preserves a resonable level of data privacy. The second part of this thesis starts with proposing the hash function Twister-Pi, a revised version of the accepted SHA-3 candidate Twister. We not only fixed all known security issues of Twister, but also increased the overall soundness of our hash-function design. Furthermore, we present some fundamental groundwork in the area of password-hashing schemes. This research was mainly inspired by the medial omnipresence of password-leakage incidences. We show that the password-hashing scheme scrypt is vulnerable against cache-timing attacks due to the existence of a password-dependent memory-access pattern. Finally, we introduce Catena the first password-hashing scheme that is both memory-consuming and resistant against cache-timing attacks.},
  subject      = {Kryptologie},
  language  = {en}
}
@inproceedings{LopesRodriguesVilaReal,
  author    = {Lopes, Nuno and Rodrigues, Daniela and Vila Real, Paulo},
  title     = {ANALYSIS OF STEEL STRUCTURAL MEMBERS IN FIRE WITH SLENDER CROSS-SECTIONS THROUGH BEAM FINITE ELEMENTS APPLYING AN EFFECTIVE CONSTITUTIVE LAW},
  series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  editor    = {G{\"u}rlebeck, Klaus and Lahmer, Tom},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  issn      = {1611-4086},
  doi       = {10.25643/bauhaus-universitaet.2811},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28116},
  pages     = {6},
  abstract  = {Steel profiles with slender cross-sections are characterized by their high susceptibility to instability phenomena, especially local buckling, which are intensified under fire conditions. This work presents a study on numerical modelling of the behaviour of steel structural elements in case of fire with slender cross-sections. To accurately carry out these analyses it is necessary to take into account those local instability modes, which normally is only possible with shell finite elements. However, aiming at the development of more expeditious methods, particularly important for analysing complete structures in case of fire, recent studies have proposed the use of beam finite elements considering the presence of local buckling through the implementation of a new effective steel constitutive law. The objective of this work is to develop a study to validate this methodology using the program SAFIR. Comparisons are made between the results obtained applying the referred new methodology and finite element analyses using shell elements. The studies were made to laterally restrained beams, unrestrained beams, axially compressed columns and columns subjected to bending plus compression.},
  subject      = {Angewandte Informatik},
  language  = {en}
}
@article{WangArash,
  author    = {Wang, Quan and Arash, Behrouz},
  title     = {Announcement of a virtual special issue on computational carbon nanoscience},
  series = {Carbon},
  journal   = {Carbon},
  doi       = {10.1016/j.carbon.2015.05.082},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170428-31695},
  pages     = {370 -- 372},
  abstract  = {The Carbon journal is pleased to introduce a themed collection of recent articles in the area of computational carbon nanoscience. This virtual special issue was assembled from previously published Carbon articles by Guest Editors Quan Wang and Behrouz Arash, and can be accessed as a set in the special issue section of the journal website homepage: www.journals.elsevier.com/carbon. The article below by our guest editors serves as an introduction to this virtual special issue, and also a commentary on the growing role of computation as a tool to understand the synthesis and properties of carbon nanoforms and their behavior in composite materials.},
  subject      = {Kohlenstoff},
  language  = {en}
}
@phdthesis{Le,
  author    = {Le, Ha Thanh},
  title     = {Behaviour of Rice Husk Ash in Self-Compacting High Performance Concrete},
  publisher = {Bauhaus-Universit{\"a}t Weimar, F.A. Finger- Institut f{\"u}r Baustoffkunde, Professur Werkstoffe des Bauens},
  address   = {Weimar},
  isbn      = {978-3-00-048928-0},
  doi       = {10.25643/bauhaus-universitaet.2373},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150310-23730},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {181},
  abstract  = {The main objective of this thesis is to investigate the characteristics of rice husk ash RHA) and then its behaviour in self-compacting high performance concrete (SCHPC) with respects to rheological properties, hydration and microstructure development and alkali silica reaction, in comparison with silica fume (SF). The main results show that the RHA is a macro-mesoporous amorphous siliceous material with a very high silica content comparable with SF. The pore size distribution is the most important parameter of RHA besides amorphous silica content. This parameter affects pore volume, specific surface area, and thus the water demand and the pozzolanic reactivity of RHA and its behaviour in SCHPC. The incorporation of RHA decreases filling and passing abilities, but significantly increases plastic viscosity and segregation resistance of SCHPC. Therefore, RHA can be used as a viscosity modifying admixture for SCHPC. The incorporation of RHA increases the superplasticizer adsorption, the superplasticizer saturation dosage, yield stress and plastic viscosity of mortar. Fresh mortar formulated from SCHPC is a shear-thickening material. The incorporation of RHA/SF ecreases the shearthickening degree. The incorporation of RHA/SF increases the degree of cement hydration. SF appears more effective at 3 days possibly due to the better nucleation site effect, whereas RHA dominates at the later ages possibly due to the internal water curing effect. The incorporation of RHA/SF increases the degree of C3S hydration, particularly the C3S hydration rate from 3 to 14 days. The pozzolanic reaction takes place outside and inside RHA particles. The internal pozzolanic eaction products consolidate the pores inside RHA particles rather than contribute to the pore refinement in the cement matrix. In the presence of the high alkali concentration, RHA particles act as microreactive aggregates and react with alkali hydroxide to generate the expansive alkali silica reaction products. Increasing the particle size and temperature increases the alkali silica reactivity of RHA. The mechanism for the successive pozzolanic and alkali silica reactions of RHA is theorized. Additionally, a new simple mix design method is proposed for SCHPC containing various supplementary cementitious materials, i.e. RHA, SF, fly ash and limestone powder.},
  subject      = {Werkstoffkunde},
  language  = {en}
}
@inproceedings{MeierSchanz,
  author    = {Meier, J{\"o}rg and Schanz, Tom},
  title     = {Benchmarking of Optimization Algorithms},
  series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  editor    = {G{\"u}rlebeck, Klaus and Lahmer, Tom},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  issn      = {1611-4086},
  doi       = {10.25643/bauhaus-universitaet.2813},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28134},
  pages     = {6},
  abstract  = {In this paper, we present an empirical approach for objective and quantitative benchmarking of optimization algorithms with respect to characteristics induced by the forward calculation. Due to the professional background of the authors, this benchmarking strategy is illustrated on a selection of search methods in regard to expected characteristics of geotechnical parameter back calculation problems. Starting from brief introduction into the approach employed, a strategy for optimization algorithm benchmarking is introduced. The benchmarking utilizes statistical tests carried out on well-known test functions superposed with perturbations, both chosen to mimic objective function topologies found for geotechnical objective function topologies. Here, the moved axis parallel hyper-ellipsoid test function and the generalized Ackley test function in conjunction with an adjustable quantity of objective function topology roughness and fraction of failing forward calculations is analyzed. In total, results for 5 optimization algorithms are presented, compared and discussed.},
  subject      = {Angewandte Informatik},
  language  = {en}
}
@phdthesis{Lovsin,
  author    = {Lovsin, Polonca},
  title     = {Between the Urban and the Rural : Back to the city},
  doi       = {10.25643/bauhaus-universitaet.2402},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150610-24020},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {236},
  abstract  = {Abstract This doctoral thesis defines the relationship between the urban and rural in the 21st century, and focuses on food as a key component. The fact that food is, for the most part, produced in the countryside and then transported to the city has a significant influence on this very unbalanced relationship today. The main goal was to show that it is necessary to bring agriculture, urban gardening, the breeding of domestic farm animals, and beekeeping back to the city, which would have a positive affect on both the city and the countryside. All of this is already taking place at the local level, within the neighbourhoods of our cities and through the work of self-organised activities and initiatives, which have been taken up by city residents themselves. One example of this is the community garden, a new model of gardening which offers fertile ground for growing vegetables and to test various forms of co-existence, different ways of designing spaces, the creation of alternative values, and a positive vision for the future of city residents. In 2010, I co-created the community urban garden Beyond a Construction Site, which is the central part of this artistic research. Throughout the entire four-year process of creating this community garden, theory and artistic practice were intertwined, and informed one another. This community garden is an example of a self-organised and self-managed community space located in a residential neighbourhood in the centre of the city of Ljubljana, and as such is a typical example of urbanism from the bottom up. I placed the creation and development of our community garden in a dialogue with the formal way of arranging urban gardening in Ljubljana, a top-down approach, which the city has been carrying out intensively since 2007. I compared the solutions being proposed by the city of Ljubljana for organising urban gardening with the way it is organised in other European cities, the UK, and the USA. I also researched the recent rapid growth of self-organised initiatives which are focused on the local production of food and seek to find more economic and ecologically friendly models to visibly influence the future of cities and the countryside. Here, community gardens play an important role, as in addition to the production of food they are also spaces for the criticism of existing urban policies, a self-organised revitalisation of neglected spaces, and places of resilience, because they differ from that which real estate agencies, large financial companies, and city authorities desire them to be. The community garden Beyond a Construction Site has become living proof that, through a group action, the residents of a neighbourhood can influence existing city policies and the future of both their own neighbourhood and that of the entire city. The initiators of this garden are artists and architects, and we began this community garden in the context of an art festival, which also shows that art can influence the processes of everyday life and help to create much needed spaces within cities to serve various purposes. Our community garden has also shown itself to be an important platform for the exchange of knowledge on organic gardening, ecology in everyday life, and critical architecture, as well as serving to connect related initiatives. Together with these other initiatives we are stronger, and are influencing structural changes within city politics, thereby also co-creating the future of Ljubljana. This community garden is helping us to redefine our relationship with the city and re-awaken the desires and actions of residents connected with realising their fundamental right, the right to the city. My other artworks, which I am presenting in the context of this doctoral thesis, show an optimistic vision for the future of cities. The video animations Back to the City (2011) and The Right Balance (2013), as well as the accompanying collages, visualise a city of the future where urban and rural practices live together side-by-side. This vision is being realised by city residents themselves, with their active participation in the creation of community gardens, growing their own vegetables, urban beekeeping, and by having egg-laying hens in their gardens. My desire was also to present the theoretical concept and scientific research to a non-academic public, and to people without specialised training. Using the method of storytelling I included knowledge from the research into the video animations and collages. In this way my artistic work, with an intentional playfulness, challenges today's faith in science and theoretical concepts, as well as directing attention to working with common sense, with one's own hands, and with the earth. This can contribute to a change in the still dominant anthropocentric view of nature, which is an urgently needed change for our future. Keywords: rural, urban agriculture, community gardens, urban beekeeping, the bottom-up approach to urban planning, alternative spaces},
  subject      = {Gemeinschaftsgarten},
  language  = {en}
}
@inproceedings{AlaladeKafleWuttkeetal.,
  author    = {Alalade, Muyiwa and Kafle, Binod and Wuttke, Frank and Lahmer, Tom},
  title     = {CALIBRATION OF CYCLIC CONSTITUTIVE MODELS FOR SOILS BY OSCILLATING FUNCTIONS},
  series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar},
  editor    = {G{\"u}rlebeck, Klaus and Lahmer, Tom},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  issn      = {1611-4086},
  doi       = {10.25643/bauhaus-universitaet.2793},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-27932},
  pages     = {6},
  abstract  = {In order to minimize the probability of foundation failure resulting from cyclic action on structures, researchers have developed various constitutive models to simulate the foundation response and soil interaction as a result of these complex cyclic loads. The efficiency and effectiveness of these model is majorly influenced by the cyclic constitutive parameters. Although a lot of research is being carried out on these relatively new models, little or no details exist in literature about the model based identification of the cyclic constitutive parameters. This could be attributed to the difficulties and complexities of the inverse modeling of such complex phenomena. A variety of optimization strategies are available for the solution of the sum of least-squares problems as usually done in the field of model calibration. However for the back analysis (calibration) of the soil response to oscillatory load functions, this paper gives insight into the model calibration challenges and also puts forward a method for the inverse modeling of cyclic loaded foundation response such that high quality solutions are obtained with minimum computational effort. Therefore model responses are produced which adequately describes what would otherwise be experienced in the laboratory or field.},
  subject      = {Angewandte Informatik},
  language  = {en}
}
@article{Bargstaedt,
  author    = {Bargst{\"a}dt, Hans-Joachim},
  title     = {Challenges of BIM for Construction Site Operations},
  series = {Procedia Engineering},
  journal   = {Procedia Engineering},
  doi       = {10.1016/j.proeng.2015.08.123},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170413-31218},
  pages     = {52 -- 59},
  abstract  = {Building Information Modeling is a powerful tool for the design and for a consistent set of data in a virtual storage. For the application in the phases of realization and on site it needs further development. The paper describes main challenges and main features, which will help the development of software to better service the needs of construction site managers},
  subject      = {Building Information Modeling},
  language  = {en}
}
@phdthesis{Sucker,
  author    = {Sucker, Katharina},
  title     = {Communities in discourse and space. Towards a spatial dialectic in gated residential developments},
  doi       = {10.25643/bauhaus-universitaet.2346},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150206-23466},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {243},
  abstract  = {This research projects deals with the discoursivity of spatial production. By looking at contemporary residential development in the city of Istanbul, I will examine the reciprocity of the material production of space on one hand, and social discourses on the other, in order to make a contribution to how physical space can be used as a source of research in urban studies. In real estate marketing social discourses are used as a source of reference for place branding or identity design. Branding concepts therefore relate to how social groups imagine their position or future position in society, imaginaries that are continuously influenced and changed by social dynamics within the city but also from the outside. How such urban identities are formed and it what way they relate to the urban environment is crucial to a wide spectrum of social and cultural science. The constitutive role urban space attains has been described and analysed in much detail. Such scrutiny however has yet to be applied to the visual and communicative forms of engagement, the build environment partakes in the formation and change of social discourses.},
  subject      = {Architektur},
  language  = {en}
}
@inproceedings{Koenig,
  author    = {K{\"o}nig, Reinhard},
  title     = {CPlan: An Open Source Library for Computational Analysis and Synthesis},
  series = {33rd eCAADe Conference},
  booktitle = {33rd eCAADe Conference},
  editor    = {Martens, Bob and Wurzer, G, Gabriel and Grasl, Tomas and Lorenz, Wolfgang and Schaffranek, Richard},
  publisher = {Vienna University of Technology},
  address   = {Vienna},
  doi       = {10.25643/bauhaus-universitaet.2503},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160118-25037},
  pages     = {245 -- 250},
  abstract  = {Some caad packages offer additional support for the optimization of spatial configurations, but the possibilities for applying optimization are usually limited either by the complexity of the data model or by the constraints of the underlying caad system. Since we missed a system that allows to experiment with optimization techniques for the synthesis of spatial configurations, we developed a collection of methods over the past years. This collection is now combined in the presented open source library for computational planning synthesis, called CPlan. The aim of the library is to provide an easy to use programming framework with a flat learning curve for people with basic programming knowledge. It offers an extensible structure that allows to add new customized parts for various purposes. In this paper the existing functionality of the CPlan library is described.},
  subject      = {Architektur},
  language  = {en}
}
@phdthesis{Kloke,
  author    = {Kloke, Christina Anna},
  title     = {Das Manifest als Medium der Rezeptionssteuerung im Architektur- und Designdiskurs},
  doi       = {10.25643/bauhaus-universitaet.2428},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150702-24284},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {225},
  abstract  = {In der vorliegenden Arbeit werden Manifest{\"a}ußerungen des Design- und Architekturdiskurses im situativen, medialen, institutionellen und historischen Kontext untersucht. Auf Grundlage einer Analyse der Etymologie und der Ideengeschichte des Manifestes wird anhand ausgew{\"a}hlter Beispiele die These belegt, dass das Medium vor allem der gezielten Rezeptionssteuerung im Diskurs dient. Dar{\"u}ber hinaus wird die F{\"a}higkeit und Bedeutung des Manifestes als Spiegel vergangener und gegenw{\"a}rtiger, aber auch als Wegbereiter zuk{\"u}nftiger Diskurse analysiert und Entwicklungen des Manifestes hinsichtlich Stilistik, Inhalt, Funktion und Bedeutung im Design- und Architekturdiskurs dargestellt.},
  subject      = {Manifest},
  language  = {de}
}
@phdthesis{Kloke,
  author    = {Kloke, Christina Anna},
  title     = {Das Manifest als Medium der Rezeptionssteuerung im Architektur- und Designdiskurs},
  doi       = {10.25643/bauhaus-universitaet.2415},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150623-24151},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {225},
  abstract  = {In der vorliegenden Arbeit werden Manifest{\"a}ußerungen des Design- und Architekturdiskurses im situativen, medialen, institutionellen und historischen Kontext untersucht. Auf Grundlage einer Analyse der Etymologie und der Ideengeschichte des Manifestes wird anhand ausgew{\"a}hlter Beispiele die These belegt, dass das Medium vor allem der gezielten Rezeptionssteuerung im Diskurs dient. Dar{\"u}ber hinaus wird die F{\"a}higkeit und Bedeutung des Manifestes als Spiegel vergangener und gegenw{\"a}rtiger, aber auch als Wegbereiter zuk{\"u}nftiger Diskurse analysiert und Entwicklungen des Manifestes hinsichtlich Stilistik, Inhalt, Funktion und Bedeutung im Design- und Architekturdiskurs dargestellt.},
  subject      = {Manifest},
  language  = {de}
}