@inproceedings{ZimmermannBartels,
  author    = {Zimmermann, J{\"u}rgen and Bartels, Jan-Hendrik},
  title     = {TREE-BASED METHODS FOR RESOURCE INVESTMENT AND RESOURCE LEVELLING PROBLEMS},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.3040},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30405},
  pages     = {6},
  abstract  = {The execution of project activities generally requires the use of (renewable) resources like machines, equipment or manpower. The resource allocation problem consists in assigning time intervals to the execution of the project activities while taking into account temporal constraints between activities emanating from technological or organizational requirements and costs incurred by the resource allocation. If the total procurement cost of the different renewable resources has to be minimized we speak of a resource investment problem. If the cost depends on the smoothness of the resource utilization over time the underlying problem is called a resource levelling problem. In this paper we consider a new tree-based enumeration method for solving resource investment and resource levelling problems exploiting some fundamental properties of spanning trees. The enumeration scheme is embedded in a branch-and-bound procedure using a workload-based lower bound and a depth first search. Preliminary computational results show that the proposed procedure is promising for instances with up to 30 activities.},
  subject      = {Architektur <Informatik>},
  language  = {en}
}
@inproceedings{ZangSommer,
  author    = {Zang, Di and Sommer, G.},
  title     = {ALGEBRAICALLY EXTENDED 2D IMAGE REPRESENTATION},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.3039},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30396},
  pages     = {10},
  abstract  = {We present an algebraically extended 2D image representation in this paper. In order to obtain more degrees of freedom, a 2D image is embedded into a certain geometric algebra. Combining methods of differential geometry, tensor algebra, monogenic signal and quadrature filter, the novel 2D image representation can be derived as the monogenic extension of a curvature tensor. The 2D spherical harmonics are employed as basis functions to construct the algebraically extended 2D image representation. From this representation, the monogenic signal and the monogenic curvature signal for modeling intrinsically one and two dimensional (i1D/i2D) structures are obtained as special cases. Local features of amplitude, phase and orientation can be extracted at the same time in this unique framework. Compared with the related work, our approach has the advantage of simultaneous estimation of local phase and orientation. The main contribution is the rotationally invariant phase estimation, which enables phase-based processing in many computer vision tasks.},
  subject      = {Architektur <Informatik>},
  language  = {en}
}
@inproceedings{WoszczynaKaminskiMajetal.,
  author    = {Woszczyna, Anna and Kaminski, Mieczysław and Maj, Marek and Ubysz, Andrzej},
  title     = {ANALYSING THE INFLUENCE OF THE REINFORCED CONCRETE CHIMNEY GEOMETRY CHANGES ON THE STRESSES IN THE CHIMNEY SHAFT},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.3038},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30388},
  pages     = {7},
  abstract  = {Analysis of the reinforced concrete chimney geometry changes and their influence on the stresses in the chimney mantle was made. All the changes were introduced to a model chimney and compared. Relations between the stresses in the mantle of the chimney and the deformations determined by the change of the chimney's vertical axis geometry were investigated. The vertical axis of chimney was described by linear function (corresponding to the real rotation of the chimney together with the foundation), and by parabolic function (corresponding to the real dislocation of the chimney under the influence of the horizontal forces - wind). The positive stress pattern in the concrete as well as the negative stress pattern in the reinforcing steel have been presented. The two cases were compared. Analysis of the stress changes in the chimney mantle depending on the modification in the thickness of the mantle (the thickness of the chimney mantle was altered in the linear or the abrupt way) was carried out. The relation between the stresses and the chimney's diameter change from the bottom to the top of the chimney was investigated. All the analyses were conducted by means of a specially developed computer program created in Mathematica environment. The program makes it also possible to control calculations and to visualize the results of the calculations at every stage of the calculation process.},
  subject      = {Architektur <Informatik>},
  language  = {en}
}
@misc{Wolny2006,
  type      = {Master Thesis},
  author    = {Wolny, Petra},
  title     = {Analyse der Trag- und Funktionsf{\"a}higkeit von Lagern und Pfeilern bei unterschiedlichen Sicherheitskonzepten},
  doi       = {10.25643/bauhaus-universitaet.751},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-7516},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2006},
  abstract  = {Bemessung der Lager und Pfeiler einer f{\"u}nffeldrigen zweistegigen vorgespannten Plattenbalkenbr{\"u}cke in Massivbauweise; Analyse der Einwirkungen, der Kr{\"a}fte und Bewegungen in den Lagerungspunkten sowie der Lager und Pfeiler;},
  subject      = {Analyse},
  language  = {de}
}
@inproceedings{WolkowiczRuthStahr,
  author    = {Wolkowicz, Christian and Ruth, J{\"u}rgen and Stahr, Alexander},
  title     = {TOOL TO CHECK TOPOLOGY AND GEOMETRY FOR SPATIAL STRUCTURES ON BASIS OF THE EXTENDED MAXWELL'S RULE},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.3037},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30370},
  pages     = {8},
  abstract  = {One of the simplest principle in the design of light-weight structures is to avoid bending. This can be achieved by dissolving girders into members acting purely in axial tension or compression. The employment of cables for the tensioned members leads to even lighter structures which are called cable-strut structures. They constitute a subclass of spatial structures. To give fast information about the general feasibility of an architectural concept employing cable-strut structures is a challenging task due to their sophisticated mechanical behavior. In this regard it is essential to control if the structure is stable and if pre-stress can be applied. This paper presents a tool using the spreadsheet software Microsoft (MS) Excel which can give such information. Therefore it is not necessary to purchase special software and the according time consuming training is much lower. The tool was developed on basis of the extended Maxwell's rule, which besides topology also considers the geometry of the structure. For this the rank of the node equilibrium matrix is crucial. Significance and determination of the rank and the implementation of the corresponding algorithms in MS Excel are described in the following. The presented tool is able to support the structural designer in an early stage of the project in finding a feasible architectural concept for cable-strut structures. As examples for the application of the software tool two special cable-strut structures, so called tensegrity structures, were examined for their mechanical behavior.},
  subject      = {Architektur <Informatik>},
  language  = {en}
}
@inproceedings{Wolff2006,
  author    = {Wolff, Ulrich},
  title     = {Die richtige Weiterbildung f{\"u}r den systematischen Kompetenzaufbau},
  doi       = {10.25643/bauhaus-universitaet.848},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8480},
  year      = {2006},
  subject      = {Weimar / Bauhaus-Universit{\"a}t / Professur Baubetrieb und Bauverfahren},
  language  = {de}
}
@inproceedings{WittwerBecker,
  author    = {Wittwer, Christof and Becker, Rainer},
  title     = {MODELLBASIERTE ERTRAGSKONTROLLE F{\"U}R PV ANLAGEN IN VERNETZTEN GEB{\"A}UDEN},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.3036},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30363},
  pages     = {5},
  abstract  = {Subject of the paper is the realisation of a model based efficiency control system for PV generators using a simulation model. A standard 2-diodes model of PV generator is base of the ColSim model, which is implemented in ANSI C code for flexible code exporting. The algorithm is based on discretisized U-I characteristics, which allows the calculation of string topologies witch parallel and serial PV cells and modules. Shadowing effects can be modelled down to cell configuration using polar horizon definitions. The simulation model was ported to a real time environment, to calculate the efficiency of a PV system. Embedded System technology allows the networked operation and the integration of standard I/O devices. Futher work focus on the adaption of shadowing routine, which will be adapted to get the environment conditions from the real operation.},
  subject      = {Architektur <Informatik>},
  language  = {de}
}
@inproceedings{Wittenberg,
  author    = {Wittenberg, Reinhold},
  title     = {AUFBAU EINES MANAGEMENT-INFORMATIONS-SYSTEMS (M-I-S) UND BAUSTELLEN-CONTROLLINGS},
  editor    = {G{\"u}rlebeck, Klaus and K{\"o}nke, Carsten},
  organization    = {Bauhaus-Universit{\"a}t Weimar},
  doi       = {10.25643/bauhaus-universitaet.3035},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170327-30356},
  pages     = {7},
  abstract  = {Die meisten Insolvenzen in Deutschland kommen aus der Bauindustrie. Die Gr{\"u}nde hierf{\"u}r sind vielschichtig, jedoch kann mittels eines modern ausgerichteten M-I-S und Baustellen-Controllings fr{\"u}hzeitig erkannt werden, wie sich die Baustellenergebnisse entwickeln. Hierzu ist es notwendig, dass die Arbeitskalkulation st{\"a}ndig auf dem Laufenden gehalten wird. Nur wenn dies geschieht, sind monatliche Soll-/ Ist-Vergleiche und eine Betrachtung der cost-to-complete m{\"o}glich und sinnvoll. Eine monatlich rollierende Prognose des Baustellenergebnisses zum Bauende erm{\"o}glicht, dass gravierende Ver{\"a}nderungen des Ergebnisses umgehend aufgedeckt werden. Nur in Kenntnis dieser Entwicklungen kann das Management fr{\"u}hzeitig (im Sinne eines Fr{\"u}hwarnsystems) agieren und Steuerungsmaßnahmen ergreifen. Die Ergebnisprognose zum Bauende ist allein als Steuerungsinstrument nicht ausreichend. Die Finanzsituation der Baustelle muß auch regelm{\"a}ßig gepr{\"u}ft werden, d.h. der Leistungsstand mit der Rechnungsstellung an den Bauherren abgeglichen sowie die unbezahlten Rechnungen des Bauherren {\"u}berpr{\"u}ft werden. Das beste Prognoseergebnis ist wertlos, wenn der Bauherr seine bezogenen Leistungen nicht verg{\"u}tet. Die wirtschaftlichen Daten stehen den Verantwortlichen online im Baustellen-Informations-System (B-I-S) zur Verf{\"u}gung. Ein Ampelsystem verdeutlicht die wirtschaftliche Lage der Baustelle.},
  subject      = {Architektur <Informatik>},
  language  = {de}
}
@unpublished{WetzsteinBimber2006,
  author    = {Wetzstein, Gordon and Bimber, Oliver},
  title     = {A Generalized Approach to Radiometric},
  doi       = {10.25643/bauhaus-universitaet.762},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-7625},
  year      = {2006},
  abstract  = {We propose a novel method that applies the light transport matrix for performing an image-based radiometric compensation which accounts for all possible types of light modulation. For practical application the matrix is decomposed into clusters of mutually influencing projector and camera pixels. The compensation is modeled as a linear system that can be solved with respect to the projector patterns. Precomputing the inverse light transport in combination with an efficient implementation on the GPU makes interactive compensation rates possible. Our generalized method unifies existing approaches that address individual problems. Based on examples, we show that it is possible to project corrected images onto complex surfaces such as an inter-reflecting statuette, glossy wallpaper, or through highly-refractive glass. Furthermore, we illustrate that a side-effect of our approach is an increase in the overall sharpness of defocused projections.},
  subject      = {Association for Computing Machinery / Special Interest Group on Graphics},
  language  = {en}
}
@misc{Wetzstein2006,
  type      = {Master Thesis},
  author    = {Wetzstein, Gordon},
  title     = {Radiometric Compensation of Global Illumination Effects with Projector-Camera Systems},
  doi       = {10.25643/bauhaus-universitaet.810},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-8106},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2006},
  abstract  = {Projector-based displays have been evolving tremendously in the last decade. Reduced costs and increasing capabilities have let to a widespread use for home entertainment and scientific visualization. The rapid development is continuing - techniques that allow seamless projection onto complex everyday environments such as textured walls, window curtains or bookshelfs have recently been proposed. Although cameras enable a completely automatic calibration of the systems, all previously described techniques rely on a precise mapping between projector and camera pixels. Global illumination effects such as reflections, refractions, scattering, dispersion etc. are completely ignored since only direct illumination is taken into account. We propose a novel method that applies the light transport matrix for performing an image-based radiometric compensation which accounts for all possible lighting effects. For practical application the matrix is decomposed into clusters of mutually influencing projector and camera pixels. The compensation is modeled as a linear equation system that can be solved separately for each cluster. For interactive compensation rates this model is adapted to enable an efficient implementation on programmable graphics hardware. Applying the light transport matrix's pseudo-inverse allows to separate the compensation into a computational expensive preprocessing step (computing the pseudo-inverse) and an on-line matrix-vector multiplication. The generalized mathematical foundation for radiometric compensation with projector-camera systems is validated with several experiments. We show that it is possible to project corrected imagery onto complex surfaces such as an inter-reflecting statuette and glass. The overall sharpness of defocused projections is increased as well. Using the proposed optimization for GPUs, real-time framerates are achieved.},
  subject      = {Association for Computing Machinery / Special Interest Group on Graphics},
  language  = {en}
}