Hochschulschriftenserver der TH Wildau
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Adaption of 3D Printing for Rapid Tooling
No full textOver the course of the last decade 3D printing has become a more established technology in terms of prototype development (rapid prototyping). The current effort is focused on transferring this knowhow into a product driven approach in order to manufacture even small batch sizes more economic. In terms of this work, this idea is adapted for the development of injection molds (rapid manufacturing). Hereby, a hardened polymer is used to create a forming cavity instead of tool-steel. In order to fulfil the mechanical process requirements of micro injection molding such as form stability under temperature and pressure this cavity is nevertheless integrated into a metal housing. A first set of experiments has been carried out using this develop mold to verify the capabilities of the developed prototype as well as molding process. Based on these first results, an optimization is carried out to improve the next iteration of this molding tool
Old wine into old wineskins
No full textWildau ist für über einhundert Jahren als Industriestandort vor den Toren Berlins entstanden. Der Südzipfel dieses industriellen Areals, auf dem Lokomotiven hergestellt und später der Schwermaschinenbau die Anlagen nachnutzte, bildet heute den Hochschulcampus der TH Wildau. Nach der politischen Wende wurden aus ehemaligen Fabrikhallen Lehr- und Forschungsgebäude mit Hörsälen, Büros, Laboren und einer Bibliothek. Mit der Umwidmung einer ehemaligen Verladehalle in eine Bibliothek geht ein besonderer qualitativer Schritt einher, sowohl in der Architekur als auch im Service. Die Einbettung der Bibliothek in dieses denkmalgeschützte Ensemble liefert auf besondere Weise Identität und Nachhaltigkeit
A monolithically integrated micro fluidic channel in a silicon-based photonic-integrated-circuit technology for biochemical sensing
No full textIn this work, a cost-effective optofluidic system is propossed and preliminary experimental results are presented. A microfluidic channel monolithically integrated into a photonic integrated circuit technology is used in conjunc- tion with a cyclo-olefin copolymer (COC) substrate to provide fluidic in- and output ports. We report on initial experimental results as well as on the simple and cost-effective fabrication of this optofluidic system by means of micro-milling
Konzeption und Entwicklung eines datengetriebenen Unterstützungssystems für Etatplanung und Mittelallokation einer hybriden Spezialbibliothek
No full textAufgrund von ökonomischen Entwicklungen müssen Bibliotheken ihr Etat effizient und bedarfsgerecht einsetzen. Zudem werden Etatverhandlungen in Bibliotheken immer wichtiger. Das Ziel der vorliegenden Masterarbeit war es, ein Proof-of-Concept eines datengetriebenen Unterstützungssystems zur Etatplanung- und Mittelallokation für die Bibliothek des Max-Planck-Institutes für empirische Ästhetik zu konzipieren und zu entwickeln. Dafür wurden aus verschiedenen bibliothekarischen Bereichen Daten analysiert und ausgewertet. Das datengetriebene Unterstützungssystem ermöglicht die anschauliche Anzeige von wesentlichen Key Performance Indicators wie Budget, Umsatz, Ausleihe, Bestandsentwicklung sowie die Lesesaalnutzung in einem Dashboard. Damit kann die Bibliothek ihre Planung des Etats und den Einsatz der Mittelallokation effizienter und bedarfsgerechter gestalten sowie Verhandlungen über den Etat sicher führen.Due to economic developments, libraries must use their budgets efficiently and in line with demand. In addition, budget negotiations in libraries are becoming more and more important. The goal of this master thesis was to develop a proof-of-concept of a data-driven support system for budget planning and resource allocation for the library of the Max Planck Institute for Empirical Aesthetics. For this purpose, data from different library areas were analyzed and evaluated. The data-driven support system displays key performance indicators such as budget, expenditures, circulation, collection development, and reading room usage in a dashboard. This allows the library to plan its budget and allocate funds more efficiently and in line with its needs as well as conduct budget negotiations with confidence
EU-Citizen.Science: A Platform for Mainstreaming Citizen Science and Open Science in Europe
No full textCitizen Science (CS) is a prominent field of application for Open Science (OS), and the two have strong synergies, such as: advocating for the data and metadata generated through science to be made publicly available [1]; supporting more equitable collaboration between different types of scientists and citizens; and facilitating knowledge transfer to a wider range of audiences [2]. While primarily targeted at CS, the EU-Citizen. Science platform can also support OS. One of its key functions is to act as a knowledge hub to aggregate, disseminate and promote experience and know-how; for example, by profiling CS projects and collecting tools, resources and training materials relevant to both fields. To do this, the platform has developed an information architecture that incorporates the public participation in scientific research (PPSR)—Common Conceptual Model①. This model consists of the Project Metadata Model, the Dataset Metadata Model and the Observation Data Model, which were specifically developed for CS initiatives. By implementing these, the platform will strengthen the interoperating arrangements that exist between other, similar platforms (e.g., BioCollect and SciStarter) to ensure that CS and OS continue to grow globally in terms of participants, impact and fields of application
Maximizing Bidirectional Green Waves for Major Road Axes
No full textBoth, from an environmental perspective and with respect to road traffic flow quality, planning so-called green waves along major road axes is a well-established target for traffic engineers. For one-way road axes (e.g. the Avenues in Manhattan), this is a trivial downstream task. For bidirectional arterials, the well-known necessary condition for establishing a green wave in both direction is that the driving times between two subsequent crossings must be an integer multiple of half of the cycle time of the signal programs at the nodes.
In this paper, we propose an integer linear optimization model to establish fixed-time green waves in both directions that are as long and as wide as possible, even in the situation where the driving time condition is not fulfilled. In particular, we are considering an arterial along whose nodes separate left-turn signal groups are realized.
In our computational results, we provide examples which illustrate that allowing for selecting among different strategies for the left-turn phases is beneficial. Moreover, we show that there is always a solution with green waves in both directions that are as long and as wide as possible, where absolute priority is put on just one direction. Only when considering prioritized parts of a green band (e.g. some first few seconds), then an ideal green wave into one direction can provide suboptimal quality compared to optimizing both directions together
From InnoMix to University–Industry Collaboration: Fostering Exchange at Eye Level
No full textIn this paper, we address a specific tool—InnoMix—that is implemented to overcome the lack of university–industry interaction in a selected region facing structural change with its corresponding impact on the economy and society. InnoMix is facilitated and implemented by university-based transfer scouts who act as mediators and translators between the players of the regional innovation system. These transfer scouts are part of the Innovation Hub 13, in which the region’s partners and stakeholders, infrastructures and competencies are systematically networked with each other to set new impulses for knowledge and technology transfer. These new impulses are brought into the region through new transfer approaches ranging from people and tools to infrastructure. InnoMix can be considered to be a highly interactive tool to overcome the weak, direct interaction between researchers and potential corporate partners in the region to foster strong collaboration between academia and industry. InnoMix especially aims to strengthen interdisciplinary exchange to shed light on cross-disciplinary perspectives. For that reason, transfer scouts focusing on transfer activities related to the life sciences, digitalisation and lightweight construction are involved in the implementation of InnoMix. Based on 11 InnoMix running since 2019, we provide insights into the planning and preparation phase of InnoMix and the selection of relevant topics and requirements for matching participants. Furthermore, we clearly indicate which formats of InnoMix work best and in which way university–industry interactions could be curated after InnoMix is implemented
Manufacturing-induced surface contaminations
No full textSummary In the course of classical optics manufacturing glass components are in permanent direct contact with aqueous operating materials. Such contact leads to a certain absorption of water and hydrogenous compounds that may induce severe glass defects. In this contribution, absorption of hydrogen and other contaminants during grinding of glass was observed and qualitatively detected via laser-induced breakdown spectroscopy. It is shown that hydrogen, calcium, magnesium, and carbon are implanted into the glass surface where the contaminant concentration increases over grinding time or contact time of the glass surface with water and the grinding tool, respectively. The contaminants hydrogen, calcium, and magnesium can be attributed to the water used as lubricant. In contrast, carbon most likely originates from wear debris of the used silicon carbide grinding pads. Several possible mechanisms that lead to such surface contamination of glasses during grinding – diffusion, accumulation in micro cracks as well as the formation of hydrated silica – are finally introduced
Complex Automatic Evaluation of the Medical Images of the Paranasal Sinuses
No full textEvaluation of medical images is of key importance in the work of medical staff today. Especially this problem pays important role in otolaryngology.
The aim of our work was to develop an automatic complex method for assessing the state of the human paranasal sinuses.
Our research included 10 people of different sex and age, who were divided into groups, taking into account the recommendations of the WHO for 2019-2021. The structure of the mucous membrane of the maxillary sinus were calculated and compared.
In the course of our research, an algorithm was developed for the automatic assessment of the state of the mucous membrane of the maxillary sinus and its bone walls according to the data of the spiral computed tomography. The difference between obtained data in the manual and automatic mode is minimal
Miniaturized Blood Sampling System with Integrated Sample Preparation
No full textBlood sampling as well as sample preparation are time consuming and requires a strict procedure, which is generally performed by medical trained personal. Not carrying out the procedure correctly could result in an infection of the patient or contamination of the sample itself. These limitations should be especially considered in case of pandemic outbreaks. In order to handle such a high number of patients a novel sample preparation system paired with modern blood sampling procedure is necessary. For this reason, a new device for blood sampling and preparation is designed containing an integrated microfluidic system. The fabrication is carried out by utilizing micro moulding of PDMS as well as micro milling. A first set of initial experiments as part of a first-generation study shows promising results. However, further steps of optimisation considering flow time and preparation cycle are part of a second-generation study