Hochschulschriftenserver der TH Wildau
Not a member yet
1283 research outputs found
Sort by
Tactile Interaction with a Humanoid Robot: Effects on Physiology and Subjective Impressions
No full textThis study investigated how touching and being touched by a humanoid robot affects human physiology, impressions of the interaction, and attitudes towards humanoid robots. 21 healthy adult participants completed a 3 (touch style: touching, being touched, pointing) × 2 (body part: hand vs buttock) within-subject design using a Pepper robot. Skin conductance response (SCR) was measured during each interaction. Perceived impressions of the interaction (i.e., friendliness, comfort, arousal) were measured per questionnaire after each interaction. Participants’ demographics and their attitude towards robots were also considered. We found shorter SCR rise times in the being touched compared to the touching condition, possibly reflecting psychological alertness to the unpredictability of robot-initiated contacts. The hand condition had shorter rise times than the buttock condition. Most participants evaluated the hand condition as most friendly and comfortable and the robot-initiated interactions as most arousing. Interacting with Pepper improved attitudes towards robots. Our findings require future studies with larger samples and improved procedures. They have implications for robot design in all domains involving tactile interactions, such as caring and intimacy
Report Interviews Betriebliche Pandemieplanung
No full textDer Report zeigt auf, dass Unternehmen als Reaktion auf die COVID-19 Pandemie eigenständig Abläufe angepasst und zum Teil sogar individuelle betriebliche Pandemiepläne erstellt haben. Diese Prozesse sind dennoch oft notgedrungen und unter hohem zeitlichen Druck durchgeführt worden. Hier fehlte es an Orientierungshilfen, die die Umsetzung optimieren und die einzelnen Schritte für die Unternehmen wie auch ihre Mitarbeitenden erheblich erleichtern könnten. Besonders fehlte es ihnen an präventiven Maßnahmen, die im Rückblick schnellere Reaktionen und eine effizientere Lösung von verschiedenen Problemstellungen ermöglicht hätten. Daher bieten sich übergreifende Konzepte an, die sich auf die essentiellen Bausteine in verschiedenen Pandemiestufen einer „idealen“ Planung beziehen und an das individuelle Unternehmen anpassbar sind. Das Projekt RESPAN hat im Zuge dieser und einer weiteren quantitativen Erhebung Leitfäden sowie ein webbasiertes Tool zur Umsetzung eines eigenen Pandemieplans entwickelt, die die genannten Kriterien erfüllen und deutsche Unternehmen vor und während einer Pandemie unterstützen sollen
Analyse zum Einfluss von Schlüsselerfolgsfaktoren auf die organisationale Resilienz von Supply Chains während der COVID-19-Pandemie am Beispiel der Pharma- und Automobilindustrie
No full textEs ist unbestritten, dass die COVID-19-Pandemie die Ökonomien aller Länder in einem erheblichen Maße getroffen hat, welches kaum absehbar war. Lockdowns, Kontaktbeschränkungen und Homeoffice haben das öffentliche und wirtschaftliche Alltagsleben stark eingeschränkt. Die massiven Auswirkungen haben darüber hinaus deutlich gemacht, wie störanfällig Lieferketten heutzutage sind. Daher ist es notwendig, den Einfluss bestehender Strukturen in den Lieferketten unter dem Aspekt der Supply Chain Resilienz zu hinterfragen.
Ziel der vorliegenden Arbeit ist es, den Einfluss branchenspezifischer Schlüsselerfolgsfaktoren auf die Supply Chain Resilienz während der COVID-19-Pandemie zu untersuchen. Der Fokus der Analyse wird dabei auf die Pharma-und Automobilindustrie gelegt.
Auf Basis einer theoretischen Untersuchung werden Fachliteratur und Studien zur Supply Chain Resilienz sowie aktuelle Literatur und Beiträge zu Erkenntnissen und Auswirkungen der COVID-19-Pandemie herangezogen. Für den ersten Teil der Untersuchung werden branchen-spezifische Schlüsselerfolgsfaktoren aus der Literatur abgeleitet und im Kontext aktueller Beiträge zur Pandemie hinsichtlich ihrer Wirkung auf die Supply Chain Resilienz untersucht. Die Basis für den zweiten Teil der Analyse ist eine aus Studien abgeleitete Übersicht zu Erfolgsfaktoren einer resilienten Supply Chain. Die Analyse erfolgt allgemein und soll Erkenntnisse für alle Lieferkettenpartner ermöglichen.
Aus den Ergebnissen der ersten Analyse geht hervor, dass Pharma-Lieferketten durch die Qualitätsanforderungen der GDP, einer globalen Beschaffung, Outsourcing und Postponement geprägt sind. Im Kontext der Pandemie kristallisieren sich die Forderungen durch die GDP mit starkem Bezug zur Supply Chain Visibility und die Postponement-Strategie als Resilienz-fördernde Faktoren heraus. Das global-sourcing und Outsourcing hingegen begünstigen die Entstehung von Engpässen aufgrund von Lockdowns und Grenzschließungen und wirken dadurch Resilienz-hemmend. Im Abgleich zu den Erfolgsfaktoren einer resilienten Supply Chain zeigt sich jedoch, dass alle untersuchten Faktoren resiliente Strukturen ermöglichen können.
Die Automobil-Lieferkette ist geprägt von single-sourcing, Standardisierung, Outsourcing, Just-in-Time Belieferung und Automatisierung. Die Analyse zeigt, dass bis auf die Automatisierung alle anderen Faktoren eine Resilienz-hemmende Wirkung aufweisen, die insbesondere die Entstehungvon logistischen Engpässen oder Produktionsausfällen begünstigen. Der Abgleich zu den Erfolgsfaktoren einer resilienten Supply Chain macht deutlich, dass single-sourcing und Just-in-Time Belieferung auch losgelöst von einer konkreten Krise einen Konflikt zur Supply Chain Resilienz darstellen
From Biomaterial to Organoid - Bioprinting for Practice
No full textThe current state of technology for 3D printing with biomaterials is based on the extrusion of viscous materials. Mostly, extrusion heads utilize pneumatic pressure systems or stepper motors to force the substrate onto a surface. These methods are well developed for high viscouse materials. However, processing low viscous liquids may cause leakages in the system. This could be solved by applying continuous extrusion. Additionally, in order to process gelable substrates, such as gelatine and agar, tempered print heads in combination with a multi stage tempering system are required to prevent the system from clogging. The ongoing work presented in this paper focuses on the development of an extrusion system, which should be able to process multiple viscosities of gelatine sequentially. In order to achieve this, several measurements to examine the properties, as well as the material parameters of different biomaterials are performed. In this process gel point, force resistance and elasticity are the factors of particularly interest. Due to their ability to gel and their availability, the most relevant biomaterials are gelatine and agar. Using this data, an extrusion system involving a peristaltic pump, a heated tube and a nozzle, has been developed. The next step envisaged is to calibrate the extruder based on the obtained data and finally to validate the printing process by printing simple geometric structures. Assuming that a positive evaluation is obtained, the printing system will be tested for printing first organic test structures from patient data using the examined biomaterials
Erweckt die Lücke an realer Begegnung und Ortswechsel eine neue bibliothekarische Vernunft, die der virtuellen?
No full textDie Corona-Pandemie birgt neben den großen Herausforderungen auch Chancen, Wandel positiv zu gestalten. An der Hochschulbibliothek Wildau wurde bereits im Jahr 2019 die Agenda 2025 erarbeitet, deren Inhalte in verschiedenen Bereichen wie Infrastruktur, Raum- und Personalentwicklung ohne den gewohnten Publikumsverkehr nun noch fokussierter umgesetzt werden konnten
Element-specific contributions to improved magnetic heating of theranostic CoFe2O4 nanoparticles decorated with Pd
No full textDecoration with Pd clusters increases the magnetic heating ability of cobalt ferrite (CFO) nanoparticles by a factor of two. The origin of this previous finding is unraveled by element-specific X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) combined with atomic multiplet simulations and density functional theory (DFT) calculations. While the comparison of XAS spectra with atomic multiplet simulations show that the inversion degree is not affected by Pd decoration and, thus, can be excluded as a reason for the improved heating performance, XMCD reveals two interrelated responsible sources: significantly larger Fe and Co magnetic moments verify an increased total magnetization which enhances the magnetic heating ability. This is accompanied by a remarkable change in the field-dependent magnetization particularly for Co ions which exhibit an increased low-field susceptibility and a reduced spin canting behavior in higher magnetic fields. Using DFT calculations, these findings are explained by reduced superexchange between ions on octahedral lattice sites via oxygen in close vicinity of Pd, which reinforces the dominating antiparallel superexchange interaction between ions on octahedral and tetrahedral lattice sites and thus reduces spin canting. The influence of the delocalized nature of Pd 4d electrons on the neighboring ions is discussed and the conclusions are illustrated with spin density isosurfaces of the involved ions. The presented results pave the way to design nanohybrids with tailored electronic structure and magnetic properties
2nd German-West African Conference on Sustainable, Renewable Energy Systems (SusRES2021)
No full textRenewable energy sources are more important today than ever before, as they represent a key factor in reducing greenhouse emissions and fossil fuel consumption. Avoiding excessive burdens on future generations has now become the declared challenge of this century and justifies the efforts we must undertake to reduce global warming. This can only be achieved by conceiving new technical approaches, exploiting alternative resources and by raising people's awareness of the sustainable use of their own livelihoods. However, this change in awareness is a process that needs to be driven forward, especially in the field of research and education, and is therefore the declared aim of the Joint German-West African Conference on Sustainable, Renewable Energy Systems – SusRES. This annual conference provides a platform for exchange between scientists, students and many other interested parties, with technological progress at the forefront of the event. The SusRES conference is known as an accelerator for an ever-growing international network, not limited to the circumstances of a single country or even continent, which strives to take on and meet the global challenges of the present and future. This year's guiding theme of the event -Decentralized systems as a key factor in clean energy production for locations with limited infrastructure- of the event is primarily based on the consideration of how the energy supply of the future is to be designed. For some years now, a paradigm shift towards decentralised energy supply has been observed, which opens up new possibilities especially in areas with weak infrastructural supply. This is not just about providing energy from renewable resources, but also about exploiting this energy we have today efficiently and sustainably, whereby intelligent and interconnected systems play an ever-increasing role. The reader is provided with exciting insights into these topics within this conference proceedings elaborated by stakeholders from twelve time zones and four continents. In their contributions, the authors address important findings, especially from research but also from teaching, which represent an important milestone in their activities and thus make a significant contribution to our declared goals
Bi-facial Open-Space Photovoltaic Systems versus Conventional Systems using Mono-facial Modules
No full textAs part of a scientific work within the solar company Sunfarming GmbH, the aim was to find out whether bi-facial modules on open spaces deliver better results economically than conventional mono-facial solar modules. In this context, an already installed 750 kWp PV system with mono-facial solar modules was compared directly with a structurally identical PV system with bi-facial modules, which, however, does not exist in practice but was only simulated with PV software. The second part of the investigation includes the comparison of four different assembly systems or elevation variants in order to determine the system with the best relationship between system yield and costs.
The final result of the first investigation showed that the use of bi-facial modules reduced the specific costs per kWh by approximately 5 %. In order to improve this effect, the use of compact assembly systems is recommended, e.g. five rows of modules per table with horizontal alignment
Cyber-Physical Production Systems in Settings with Limited Infrastructure
No full textDuring the last decade production innovation was mainly focused on connectivity aspects. The vision of smart factories running on software, that uses collected machine data, has become true but foremost for leading industrial companies in highly developed countries. Apart from these, production can also be found in non-industrialized craft professions as well as in less developed countries. As digitalization does not necessarily require an industrial or developed setting the latter could possibly benefit from it as well. Socio-cyber-physical production systems have been used to describe the interdependencies of linked production systems but usually focus on highly developed regions as well as for industrial applications. This paper lines out similarities and differences for each case, introduces the concept of cyber-physical production systems (CPPS) and its extension to socio-CPPS (SCPPS), which emphasizes the role of human workers in the production environment. The relation between industrial, non-industrial production and innovations is examined. Furthermore, the widening of SCCPS concepts for non-industrial production is discussed
Isothermal amplifications – a comprehensive review on current methods
No full textAbstractThe introduction of nucleic acid amplification techniques has revolutionized the field of medical diagnostics in the last decade. The advent of PCR catalyzed the increasing application of DNA, not just for molecular cloning but also for molecular based diagnostics. Since the introduction of PCR, a deeper understanding of molecular mechanisms and enzymes involved in DNA/RNA replication has spurred the development of novel methods devoid of temperature cycling. Isothermal amplification methods have since been introduced utilizing different mechanisms, enzymes, and conditions. The ease with which isothermal amplification methods have allowed nucleic acid amplification to be carried out has had a profound impact on the way molecular diagnostics are being designed after the turn of the millennium. With all the advantages isothermal amplification brings, the issues or complications surrounding each method are heterogeneous making it difficult to identify the best approach for an end-user. This review pays special attention to the various isothermal amplification methods by classifying them based on the mechanistic characteristics which include reaction formats, amplification information, promoter, strand break, and refolding mechanisms. We would also compare the efficiencies and usefulness of each method while highlighting the potential applications and detection methods involved. This review will serve as an overall outlook on the journey and development of isothermal amplification methods as a whole