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New Work 2025–2030
(2023)
Unternehmen stehen vor der Herausforderung, durch passende Arbeitsbedingungen die bestehenden Mitarbeitenden zu binden und neue Talente zu finden. Eine mögliche Lösung für diese Herausforderungen kann ‚New Work‘ sein. Es ist notwendig zu verstehen, was New Work für die Region Vorarlberg bedeutet und was bei der Konzeption von neuen Arbeitsbe-dingungen zu berücksichtigen ist. Das Ziel der vorliegenden Arbeit ist es, eine Antwort auf die Frage zu finden, was New Work für die Region Vorarlberg in den Jahren 2025–2030 bedeutet und eine entsprechende Standortbestimmung durchzuführen. Dazu wird die folgende Forschungsfrage vertieft untersucht: ‚Was bedeutet New Work für die Region Vorarlberg in den Jahren 2025–2030?‘ Die Vertiefung dieser Fragestellung erfolgt über weitere Unterfragen. Um Antworten auf die Forschungsfrage zu erhalten, wurde ein Mixed-Methods-Ansatz gewählt. Für eine Standortbestimmung zum Thema ‚New Work‘ in Vorarlberg wurden im ersten Schritt Befragungen zweier Fokusgruppen, als qualitativer Teil der Forschung, durchgeführt. Die Ergebnisse dieser Befragung wurden ausgewertet. Aus den Ergebnissen und dem theoretischen Input wurden Hypothesen sowie ein Fragebogen zur quantitativen Untersuchung erstellt. Die qualitative Forschung ist die Grundlage für die anschließende quantitative Untersuchung. Durch diese Vorgehensweise sind sowohl eine Vertiefung und eine Ergänzung der qualitativen als auch der quantitativen Daten möglich. Die Ergebnisse zeigen, dass New Work ein generationenübergreifendes Thema ist. Es gibt keine nennenswerten Unterschiede zwischen den Generationen. Jedoch gibt es Unterschiede zwischen jüngeren und älteren Personen bezüglich der unterschiedlichen New-Work-Methoden. Die Antworten zeigen auf, dass es vor allem zwischen Frauen und Männern Unterschiede in den Vorstellungen der Arbeitsbedingungen gibt. Frauen legen vor allem Wert auf Flexibilität, psychologisches Empowerment und motivationale Faktoren. Weiterführende Forschung im Bereich ‚New Work‘ könnte sich mit den Unterschieden zwischen Frauen und Männern befassen und was die passenden Rahmenbedingungen sind, um die Leistung und Motivation dieser beiden Personengruppen zu steigern.
Projekte zeichnen sich aus durch ihre Einmaligkeit und Offenheit. Unternehmen sind bestrebt ihre Projekte zum positiven Abschluss zu bringen. In dieser Ausarbeitung wird die Rolle der Verhaltensökonomie im Projektmanagement beleuchtet. Dabei wird der Fokus auf die Projektplanung und insbesondere auf die Aufwandsschätzung gelegt. Der theoretische Rahmen bildet ein solides Verständnis von Verhaltensökonomie und Projektmanagement. Mittels systematischer Literaturrecherche für den Zeitraum von 2017 bis 2023 werden die gängigsten kognitiven Verzerrungen ergründet, die in Projekten, insbesondere bei Aufwandsschätzungen häufig auftreten. Die häufigste kognitive Verzerrung ist der Optimism Bias, gefolgt vom Escalation of Commitment, Strategic Misrepresentation bis hin zur Planning Fallacy und dem Endownment Effect. Das Ergebnis dieser Ausarbeitung zeigt, dass kognitive Verzerrungen den Projekterfolg maßgeblich beeinflussen können.
In an oversaturated market, companies are required to use innovative and, above all, creative advertising methods to capture their customers’ attention, and thus differentiate themselves from rival businesses. To this end, companies have been increasingly relying on the use of humor, a phenomenon that remains highly subjective and is perceived differently by each individual. This master’s thesis, which was completed as part of the International Marketing and Sales program at the FH Vorarlberg, focuses on this phenomenon of humor as well as its impact on advertising perception. With the aid of three different theories, the term “humor” is defined. Furthermore, this study explains and researches the so-called vampire effect, wherein various factors (in this case humor) draw attention away from the actual advertising message. In addition, this thesis takes a closer look at involvement, as a person’s involvement or interest in a brand or product can influence brand and product recall and recognition. An online survey was conducted to determine whether the vampire effect caused by humor is able to influence brand and product recall. In other words, this concerns whether the viewer can still remember the brand and product afterward or whether the humor employed triggers the vampire effect. Furthermore, this thesis explored whether the vampire effect caused by humor is able to influence brand and product recognition. Recall is the retrieval of information from memory without direct cues, whereas recognition refers to the recognition of information when it is presented again. Furthermore, within this context, it was discovered that brand and product recall varies with low and high involvement viewers of the advertisement. In other words, this means that the strength of the vampire effect caused by humor changes depending on the strength of the viewer’s involvement. During the course of this research, it was further observed that the humor employed significantly affects the perception of the advertising message, thus confirming the existence of the vampire effect. This effect also influences both brand as well as product recall and recognition. In both cases, participants in the survey were less able to remember the product and brand in the humorous advertising. Furthermore, it was proven that people with low involvement in the advertised product group are more heavily affected by the vampire effect. As such, they are more likely to not remember the product or brand after seeing the advertisement.
Diese vorliegende Masterarbeit untersucht die Herausforderungen, vor denen kleine und mittlere Unternehmen (KMUs) stehen, um den künftigen ESG-Anforderungen (Umwelt, Soziales, Governance) von Banken bei der Kreditvergabe gerecht zu werden. Anhand einer umfassen-den Literaturanalyse sowie einer qualitativen Inhaltsanalyse mittels Experteninterviews werden verschiedene Aspekte beleuchtet, darunter bankenregulatorische Vorschriften, Auswirkungen der ESG-Implementierung auf Kreditkonditionen und Kreditwürdigkeit, Vorbereitungsstrategien für KMUs und abgeleitete Handlungsempfehlungen. Die Ergebnisse zeigen, dass eine Integration von ESG-Kriterien in den Kreditprüfungsprozess eine ganzheitlichere Bewertung der Rückzahlungsfähigkeit ermöglicht und positive Auswirkungen auf die Kreditwürdigkeit haben kann. Jedoch sind die praktischen Auswirkungen auf Kreditkonditionen und -entscheidungen noch begrenzt und erfordern weitere Untersuchungen. Die Arbeit verdeutlicht auch die Bedeutung von ESG-Kompetenzen, Datenmanagement und einer Anpassung der Geschäftsmodelle von KMUs, um den ESG-Anforderungen gerecht zu werden. Die Ergebnisse bieten wertvolle Erkenntnisse für KMUs, um proaktiv ESG-Aspekte zu berücksichtigen und zu managen.
Alleviating the curse of dimensionality in minkowski sum approximations of storage flexibility
(2023)
Many real-world applications require the joint optimization of a large number of flexible devices over some time horizon. The flexibility of multiple batteries, thermostatically controlled loads, or electric vehicles, e.g., can be used to support grid operations and to reduce operation costs. Using piecewise constant power values, the flexibility of each device over d time periods can be described as a polytopic subset in power space. The aggregated flexibility is given by the Minkowski sum of these polytopes. As the computation of Minkowski sums is in general demanding, several approximations have been proposed in the literature. Yet, their application potential is often objective-dependent and limited by the curse of dimensionality. In this paper, we show that up to 2d vertices of each polytope can be computed efficiently and that the convex hull of their sums provides a computationally efficient inner approximation of the Minkowski sum. Via an extensive simulation study, we illustrate that our approach outperforms ten state-of-the-art inner approximations in terms of computational complexity and accuracy for different objectives. Moreover, we propose an efficient disaggregation method applicable to any vertex-based approximation. The proposed methods provide an efficient means to aggregate and to disaggregate typical battery storages in quarter-hourly periods over an entire day with reasonable accuracy for aggregated cost and for peak power optimization.
Whether at the intramolecular or cellular scale in organisms, cell-cell adhesion adapt to external mechanical cues arising from the static environment of cells and from dynamic interactions between neighboring cells. Cell-cell adhesions need to resist detachment forces to secure the integrity and internal organization of organisms. In the past, various techniques have been developed to characterize adhesion properties of molecules and cells in vitro, and to understand how cells sense and probe their environment. Atomic force microscopy and dual-pipette aspiration, where cells are mainly present in suspension, are common methods for studying detachment forces of cell-cell adhesions. How cell-cell adhesion forces are developed for adherent and environment-adapted cells, however, is less clear. Here, we designed the Cell-Cell Separation Device (CC-SD), a microstructured substrate that measures both intercellular forces and external stresses of cells towards the matrix. The design is based on micropillar arrays originally designed for cell traction-force measurements. We designed PDMS micropillar-blocks, to which cells could adhere and be able to connect to each other across the gap. Controlled stretching of the whole substrate changed the distance between blocks and increased gap size. That allowed us to apply strains to cell-cell contacts, eventually leading to cell-cell adhesion detachment, which was measured by pillar deflections. The CC-SD provided an increase of the gap between the blocks of up to 2.4-fold, which was sufficient to separate substrate-attached cells with fully developed F-actin network. Simultaneously measured pillar deflections allowed us to address cellular response to the intercellular strain applied. The CC-SD thus opens up possibilities for the analysis of intercellular force detachments and sheds light on the robustness of cell-cell adhesions in dynamic processes in tissue development.
Open tracing tools
(2023)
Background: Coping with the rapid growing complexity in contemporary software architecture, tracing has become an increasingly critical practice and been adopted widely by software engineers. By adopting tracing tools, practitioners are able to monitor, debug, and optimize distributed software architectures easily. However, with excessive number of valid candidates, researchers and practitioners have a hard time finding and selecting the suitable tracing tools by systematically considering their features and advantages. Objective: To such a purpose, this paper aims to provide an overview of popular Open tracing tools via comparison. Methods: Herein, we first identified 30 tools in an objective, systematic, and reproducible manner adopting the Systematic Multivocal Literature Review protocol. Then, we characterized each tool looking at the 1) measured features, 2) popularity both in peer-reviewed literature and online media, and 3) benefits and issues. We used topic modeling and sentiment analysis to extract and summarize the benefits and issues. Specially, we adopted ChatGPT to support the topic interpretation. Results: As a result, this paper presents a systematic comparison amongst the selected tracing tools in terms of their features, popularity, benefits and issues. Conclusion: The result mainly shows that each tracing tool provides a unique combination of features with also different pros and cons. The contribution of this paper is to provide the practitioners better understanding of the tracing tools facilitating their adoption.
Das Forschungsprojekt Data Sharing Framework untersuchte Data Sharing im Kontext von datenbasierten Services und Produkten in Ökosystemen aus fünf Perspektiven: Kultur, Vertrauen, Wert, Recht & Governance, Sicherheit. Die Forschungsergebnisse bestätigen die Relevanz dieser Perspektiven und es hat sich gezeigt, dass diese Aspekte sowohl Barrieren als auch Treiber für Datennutzung und -austausch zwi- schen Unternehmen darstellen.
Ausgangspunkt waren die folgenden forschungs- und praxisleitenden Annahmen:
• These 1: KMU können durch die Nutzung und das
Teilen von Daten Mehrwerte in Form neuer Produkte und Services generieren. Aus wissenschaftlicher Sicht liegt der Fokus des Themas Daten und Data Science bisher überwiegend auf der technischen Umsetzung datenintensiver Geschäftsmodelle und Kooperationen durch die Unternehmen.
• These 2: Die technische Umsetzung ist eine notwendige Bedingung für die datenbasierte Leistun- gen, sie reicht jedoch nicht aus, um eine Kooperations- und Teilbereitschaft bei KMU hinsichtlich ihrer Daten (Daten-Teilbereitschaft) auszulösen. Zahlreiche Stakeholder zögern, Daten zu teilen, vor allem in einem grenzüberschreitenden Kontext, wie z.B. in der Programmregion.
• These 3: KMU benötigen Data Access und Data Trust Strukturen, um mögliche Kooperationspotenziale tatsächlich zu heben. Dies erfordert u.a. gemeinsa- me Standards, ein annäherndes Verständnis vom Wert der Daten, Data-Governance in Kombination mit zu definierenden Trust-Standards, welche die erforderliche formelle und informelle Sicherheit bieten.
Nachfolgend wird ein Überblick über die hieraus hervorgegangenen Ergebnisse gegeben:
Kultur
Die Perspektive der Organisationskultur stellt das Denken und Handeln im Unternehmen und im Ökosystem in den Mittelpunkt. Eine Organisationskultur, welche die Arbeit mit Daten, Data Science Praktiken und vor allem das Teilen von Daten ermöglicht, stellt Daten in den Mittelpunkt des Wertschöpfungsprozesses. Dies erfordert eine generelle Sensibilisierung
für das Thema Daten, durchlässige Grenzen im und zwischen Unternehmen, ebenso wie ein neues Verständnis von Rollen, Strukturen und Prozessen im Unternehmen.
Vertrauen
Das Vertrauen ist im Ökosystem von großer Bedeutung. Das Einbeziehen von internen Stakeholdern und das Starten mit kleineren Pilotprojekten wird vorgeschlagen, um Vertrauen innerhalb der Organisation und mit externen Partnern zu schaffen.
Wert
Als notwendige Voraussetzung wird der Wert der Daten hervorgehoben. Unternehmen sollten den potenziellen Wert der Datenflüsse kennen, bevor sie sich entscheiden, ob sie diese Daten teilen und nutzen möchten. Es wird empfohlen, eine grobe Quanti- fizierung des Wertflusses vorzunehmen oder gegebe- nenfalls eine detailliertere Analyse durchzuführen.
Recht & Governance
Für die Berücksichtigung rechtlicher Rahmenbedingungen gemeinsamer Datennutzung sollten Organisationen zunächst eine interne Data Governance etablieren, um auf neue regulatorische Entwicklungen reagieren zu können. Die Einrichtung von Data-Asset-Management, Data-IP und -Compliance-Ma-nagement und Data-Contract-Management wird hier empfohlen.
Datensicherheit
Im Sicherheitskontext sind Methoden zur Gewährleistung der Datenintegrität, Privatsphäre und Sicherheit entscheidend. Es wird empfohlen, einen kollaborativen Ansatz zur Implementierung von Sicherheitsstandards zu verfolgen und dabei IKT-Experten einzubeziehen. Anfänglich können Best Practices ausreichen, aber längerfristig sollte eine kontinuierliche Sicherheitsrisikobewertung und Ge- schäftsprozessintegration angestrebt werden.
Creating a schedule to perform certain actions in a realworld environment typically involves multiple types of uncertainties. To create a plan which is robust towards uncertainties, it must stay flexible while attempting to be reliable and as close to optimal as possible. A plan is reliable if an adjustment to accommodate for a new requirement causes only a few disruptions. The system needs to be able to adapt to the schedule if unforeseen circumstances make planned actions impossible, or if an unlikely event would enable the system to follow a better path. To handle uncertainties, the used methods need to be dynamic and adaptive. The planning algorithms must be able to re-schedule planned actions and need to adapt the previously created plan to accommodate new requirements without causing critical disruptions to other required actions.
Coupling is one of the most frequently mentioned metric in software systems. However, to measure logical coupling between microservices, runtime information is needed or the availability of service-log files to analyze the calls between services is required. This work presents our emerging results, in which we propose a metric to statically calculate logical coupling between microservices based on commits to versioning systems. We performed an initial validation of the proposed metric with a dataset containing 145 open-source microservices projects. The results illustrate how logical coupling affects every system and increases overtime. However, we did not find a correlation between the number of commits or the number of developers and the introduction of logical coupling. In future, we investigate why, how, and when logical coupling is introduced in a system.
This paper presents design, simulation, and optimization of the three-dimensional 1×4 optical multimode interference splitter using IP-Dip polymer as a core and polydimethylsiloxane (PDMS) Sylgard 184 as a cladding. The splitter was simulated by using beam propagation method in BeamPROP simulation engine of RSoft photonic tool and optimized for an operating wavelength of 1.55 µm. According to the minimum insertion loss, the dimensions of the MMI coupler and the length of the whole MMI splitter structure were optimized applying a waveguide with a core size of 4×4 µm2. The objective of the study is to create a design for fabrication by three-dimensional direct laser writing optical lithography.
Design, simulation, and optimization of the 1×4 optical three-dimensional multimode interference splitter using IP-Dip polymer as a core and polydimethylsiloxane (PDMS) Sylgard 184 as a cladding is demonstrated. The splitter was simulated by using beam propagation method in BeamPROP simulation module of RSoft photonic tool and optimized for an operating wavelength of 1.55 μm . According to the minimum insertion loss, the dimensions of the splitter were optimized for a waveguide with a core size of 4×4 μm2 . The objective of the study is to create the design for fabrication by three-dimensional direct laser writing optical lithography.
The role of entrepreneurs and intrapreneurs in the current zeitgeist is to drive innovation, re-shape rigid, established processes in business as well as for consumers. They use new viewpoints to pioneer new (business) models which focus on ‘smartness’ rather than the purely monetary and short-sighted models of yesteryear. Fostering and supporting the culture of this current zeitgeist is a mayor challenge for entre- and intrapreneurial support infrastructures, namely startup centres and innovation hubs of universities and other public institutions as well as innovation centres of private companies. Hereby, support may range from access to funding over provision of resources such as offices or computing hardware to coaching in the development of business ideas and strategic roadmaps for product and service deployment. In this paper, we focus on describing the status-quo of afore- mentioned support infrastructures in Vorarlberg and the Lake Constance region, then extend the scope to existing (international) approaches for aiding founders and inno- vators in the development of smart services. An analysis of success stories of the Vorarlberg startup centre ‘startupstube’ and other initiatives including their compar- ison to international counterparts builds the basis for a methodological framework for (service science) coaching in entre- and intrapreneurial support infrastructures. The paper is concluded by the description of a framework for choosing the right methods and tools to create service value in entre-/intrapreneurship based upon tested, proven know-how and for defining support infrastructure needs based upon pre-defined stakeholder and target groups as well as the (industry) sectors of the innovators.
International Entrepreneurship explains the opportunities and challenges facing internationalizing entrepreneurial ventures. The book inlcudes a thorough discussion of fundamentals as well as contemporary research findings. Numerous cases, featuring diverse contexts, illustrate theory and help classroom use.
Redundanz und Varietät
(2023)
Ausrechnen oder aushandeln?
(2023)
Vast amounts of oily wastewater are byproducts of the petrochemical and the shipping industry and to this day frequently discharged into water bodies either without or after insufficient treatment. To alleviate the resulting pollution, water treatment processes are in great demand. Bubble column humidifiers (BCHs) as part of humidification–dehumidification systems are predestined for such a task, since they are insensitive to different feed liquids, simple in design and have low maintenance requirements. While humidification in a bubble column has been investigated plentiful for desalination, a systematic investigation of oily wastewater treatment is missing in literature. We filled this gap by analyzing the treatment of an oil–water emulsion experimentally to derive recommendations for future design and operation of BCHs. Our humidity measurements indicate that the air stream is always saturated after humidification for a liquid height of only 10 cm. A residual water mass fraction of 3.5 wt% is measured after a batch run of six hours. Furthermore, continuous measurements show that an increase in oil mass fraction leads to a decrease in system productivity especially for high oil mass fractions. This decrease is caused by the heterogeneity of the liquid temperature profile. A lower liquid height mitigates this heterogeneity, therefore decreasing the heat demand and improving the overall efficiency. The oil content of the produced condensate is below 15 ppm, allowing discharge into various water bodies. The results of our systematic investigation prove suitability and indicate a strong future potential for the use of BCHs in oily wastewater treatment.
Purpose – The purpose of this study is to explore the exogenous and endogenous drivers of the high-growth of Unicorn start-ups along their life cycle, with a particular focus on Unicorns in the fintech industry.
Design/methodology/approach – The study employs an explorative longitudinal analysis with a matched pair of two cases of Unicorns start-ups with similar antecedent features to understand holistically drivers over the longer term.
Findings – High-growth patterns over the longer term are the result of a combined industry- and company-life cycle perspective. Drivers and growth patterns vary significantly according to the time of entry in the industry and
its development status. The findings are systematised within a set of propositions to be tested in future research.
Research limitations/implications – The limitations lie in empirical evidence, as the analysis is limited to one matched-pair. The revealed Unicorns’ drivers for long-term growth might encourage future research to further investigate these drivers on a larger scale.
Practical implications – The study offers practical recommendations for start-ups with high-growth ambitions and advice to policy makers regarding the development of tailor-made support programs.
Originality/value – The study significantly extends extant work on growth and high-growth by examining endogenous and exogenous triggers over time and by linking the Unicorn-life cycle to the industry life cycle, an approach which has, to the best of the authors’ knowledge, not yet been applied.
Digital twin as enabler of business model innovation for infrastructure construction projects
(2023)
Emerging technologies and methods are becoming an important element of the construction industry. Digital Twins are used as a base to store data in BIM models and make use out of the data respectively make the data visible. The transparency in all phases of the lifecycle of building and infrastructure assets is crucial in order to get a more efficient lifecycle of planning, construction and maintenance. Whereas other industries increased performance in these phases by making use out of the data, construction industry is stuck in traditional methods and business models. In this paper we propose a concept that focuses on the digital production twin. The comparison of planning data with As-Is production data can empower a data driven continuous improvement process and support the decision making process of future innovations and suitable business models. This paper outlines the possibility to use the data stored in a digital twin with regards to the evaluation of possible business models.
We present design of planar 16-channel, 100-GHz multi-mode polymer-based AWG. This AWG was designed for central wavelength of 1550 nm applying AWG-Parameters tool. The AWG structure was created and simulated in the commercial photonic tool PHASAR from Optiwave. Achieved transmission characteristics were evaluated by AWG-Analyzer tool. For the design, multi-mode waveguides having a cross-section of (4x4) µm2 were used. The simulated results show strong worsening of the transmission characteristics in comparison when using single-mode waveguides. Nevertheless, the transmitting channels are clearly separated. The reason for using thicker multi-mode waveguides in the design is possibility to fabricate the AWG structure on polymer basis using direct laser writing lithography.
Statistische Methodenkompetenz wird im Controlling zunehmend bedeutender, so ist die evidenzbasierte Prognose durch algorithmische Analyse von Datenbeständen ein Schwerpunkt von Controlling Analytics. Die Fallstudie durchleuchtet daher anhand von Datenmaterial des Schweizer Bundesamts für Statistik das Vorgehen bei einer Datenanalyse, insbesondere beim Einsatz der Zeitregression für Prognosezwecke, und geht dabei auf methodische Besonderheiten, Caveats und Einsatzmöglichkeiten in Microsoft Excel ein. Die Fallbeschreibung und Aufgaben sind im WiSt-Heft Nr. 4/23 zu finden.
Digitalization is changing business models and operational processes. At the same time, improved data availability and powerful analytical methods are influencing controlling and increasingly require the use of statistical and information technology skills and knowledge. Using a case study from marketing controlling, the article shows the use of business analytics methods and addresses the tasks of controlling in the digital age.
Optoelectronic system based on photonic integrated circuits to miniaturize spectral domain OCT
(2023)
We present a miniaturized optical coherence tomography (OCT) setup based on photonic integrated circuits (PIC) for the 850 nm range. We designed a 512-channel arrayed waveguide grating (AWG) on a PIC for spectral domain OCT (SD-OCT) that is co-integrated with PIN-photodiodes and analog-to-digital-converters on one single chip. This image sensor is combined with all the necessary electronics to act as a camera. It is integrated into a fiber-based OCT system, achieving a sensitivity of >80dB and various samples are imaged. This optoelectronic system will allow building small and cost-effective OCT systems to monitor retinal diseases.
Der vorliegende Beitrag stellt das Konzept eines Flipped Classroom-Ansatzes für die Lehrveranstaltung „Grundlagen der Wirtschaft und finanziellen Unternehmensführung“ im Masterstudiengang Wirtschaftsinformatik der Fachhochschule Vorarlberg vor. Es werden die Rahmenbedingungen der Lehrveranstaltung erläutert und die didaktischen Überlegungen sowie Zielsetzungen diskutiert. Besonderes Augenmerk wird auf die Vorteile des Blended Learning sowie die Bedeutung von Feedback gelegt. Anschließend werden die Inhalte, der Aufbau sowie die verwendeten Materialien und Tools beschrieben. Es wird gesondert auf den Feedbackprozess eingegangen. Abschließend erfolgt eine Bewertung des Lehrveranstaltungskonzepts anhand der Dimensionen technischer Ablauf, Engagement der Studierenden, Klausurerfolg und Lehrveranstaltungsevaluation. Auf dieser Basis werden mögliche Verbesserungen für die Zukunft abgeleitet. Insgesamt wird deutlich, dass der Flipped Classroom-Ansatz eine effektive Methode ist, die mit Standardtools umgesetzt werden kann und die den Lernerfolg und die Zufriedenheit der Studierenden fördert.
The main aims of this work are the validation of the developed process of gluing a single-mode optical fiber array with a photonic chip and the selection of a more suitable adhesive from the two adhesives being compared. An active alignment system was used for adjusting the two optical fiber arrays to a photonics chip. The gluing was done by two compared UV curable adhesives applied in the optical path. The insertion losses of glued coupling were measured and investigated at two discrete wavelengths 1310 nm and 1550 nm during temperature testing in the climatic chamber according to Telcordia GR_1209_Corei04 [3]. The measurement, investigation, and comparison of insertion losses of the glued coupling at the spectral band from 1530 nm to 1570 nm were done immediately after gluing process and after three temperature cycles in the climatic chamber with one month delay.
In this paper, a 256-channel, 10-GHz arrayed waveguide gratings demultiplexer for ultra-dense wavelength division multiplexing was designed using an in-house developed tool called AWG-Parameters. The AWG demultiplexer was designed for a central wavelength of 1550 nm and the structure was simulated in PHASAR tool from Optiwave. Two different AWG designs were developed and the influence of the design parameters on the AWG performance was studied.
Das Kreisgespräch
(2023)
In Bewegung kommen
(2023)
Das Modellprojekt „Caritas Care – Betreuung zuhause“ wurde 2012 in einer Kooperation der Caritas Schweiz und der Caritas Alba Iulia (Transsylvanien/Rumänien) ins Leben gerufen. Damit sollte ein Modell geschaffen werden, welches einerseits dem wachsenden Markt der „Betreuung zuhause“ in der Schweiz entgegenkommt, aber andererseits fairere Arbeitsbedingungen für die Betreuungspersonen vorsieht. Fairness sollte durch einen Versicherungsschutz der Arbeitskräfte, Weiterbildungsmöglichkeiten und ein Entgelt, das mit anderen Arbeitsverhältnissen vergleichbar ist, sowie dank klar abgegrenzter Arbeits-, Präsenz- und Freizeit erreicht werden. Die Umsetzung erfolgt folgendermaßen: Angestellte Betreuungs- und Pflegefachkräfte der Caritas Alba Iulia können für sechs Wochen bis zu drei Monaten in die Schweiz gehen, um dort in Privathaushalten hilfsbedürftige Menschen zu unterstützen (Live-in-Betreuungen). Sie werden während dieser Zeit von der Caritas Schweiz angestellt. Danach kehren die Betreuenden wieder in ihr Anstellungsverhältnis bei der Caritas Alba Iulia zurück. Es wird sozusagen Personal „verliehen“. Damit soll einem Verlust von qualifiziertem Betreuungs- und Pflegepersonal durch Abwanderung aus Rumänien entgegengewirkt werden. Im Rahmen des studiengangsübergreifenden, interdisziplinären Kontextstudiums der Masterstudiengänge der Fachhochschule Vorarlberg (Österreich) hat sich eine Gruppe Forschender zum Ziel gesetzt, dieses Modellprojekt forscherisch zu erkunden. Wir wollten wissen, wie dieses Live-in-Betreuungsangebot nach zehn Jahren Laufzeit funktioniert. Insbesondere interessierten uns die Erfahrungen der rumänischen Betreuer:innen und ihrer Angehörigen sowie der projektverantwortlichen Leitungspersonen in der Caritas Alba Iulia und der Caritas Schweiz. Im Rahmen einer Feldforschungswoche im Juli 2022 in Transsylvanien/Siebenbürgen wurden 28 formelle Interviews mit Projektverantwortlichen, Betreuern/Betreuerinnen und deren Angehörigen durchgeführt. Zusätzlich wurden Dokumente und Feldnotizen sowie Gedächtnisprotokolle von informellen Gesprächen mit Personen der extramuralen Einrichtungen in Rumänien in die Auswertung integriert. Die Auswertung erfolgte inhaltsanalytisch.
Organic acidurias (OAs), urea-cycle disorders (UCDs), and maple syrup urine disease (MSUD) belong to the category of intoxication-type inborn errors of metabolism (IT-IEM). Liver transplantation (LTx) is increasingly utilized in IT-IEM. However, its impact has been mainly focused on clinical outcome measures and rarely on health-related quality of life (HRQoL). Aim of the study was to investigate the impact of LTx on HrQoL in IT-IEMs. This single center prospective study involved 32 patients (15 OA, 11 UCD, 6 MSUD; median age at LTx 3.0 years, range 0.8–26.0). HRQoL was assessed pre/post transplantation by PedsQL-General Module 4.0 and by MetabQoL 1.0, a specifically designed tool for IT-IEM. PedsQL highlighted significant post-LTx improvements in total and physical functioning in both patients' and parents' scores. According to age at transplantation (≤3 vs. >3 years), younger patients showed higher post-LTx scores on Physical (p = 0.03), Social (p < 0.001), and Total (p =0.007) functioning. MetabQoL confirmed significant post-LTx changes in Total and Physical functioning in both patients and parents scores (p ≤ 0.009). Differently from PedsQL, MetabQoL Mental (patients p = 0.013, parents p = 0.03) and Social scores (patients p = 0.02, parents p = 0.012) were significantly higher post-LTx. Significant improvements (p = 0.001–0.04) were also detected both in self- and proxy-reports for almost all MetabQoL subscales. This study shows the importance of assessing the impact of transplantation on HrQoL, a meaningful outcome reflecting patients' wellbeing. LTx is associated with significant improvements of HrQol in both self- and parentreports. The comparison between PedsQL-GM and MetabQoL highlighted that MetabQoL demonstrated higher sensitivity in the assessment of diseasespecific domains than the generic PedsQL tool.
Demand-side management approaches that exploit the temporal flexibility of electric vehicles have attracted much attention in recent years due to the increasing market penetration. These demand-side management measures contribute to alleviating the burden on the power system, especially in distribution grids where bottlenecks are more prevalent. Electric vehicles can be defined as an attractive asset for distribution system operators, which have the potential to provide grid services if properly managed. In this thesis, first, a systematic investigation is conducted for two typically employed demand-side management methods reported in the literature: A voltage droop control-based approach and a market-driven approach. Then a control scheme of decentralized autonomous demand side management for electric vehicle charging scheduling which relies on a unidirectionally communicated grid-induced signal is proposed. In all the topics considered, the implications on the distribution grid operation are evaluated using a set of time series load flow simulations performed for representative Austrian distribution grids. Droop control mechanisms are discussed for electric vehicle charging control which requires no communication. The method provides an economically viable solution at all penetrations if electric vehicles charge at low nominal power rates. However, with the current market trends in residential charging equipment especially in the European context where most of the charging equipment is designed for 11 kW charging, the technical feasibility of the method, in the long run, is debatable. As electricity demand strongly correlates with energy prices, a linear optimization algorithm is proposed to minimize charging costs, which uses next-day market prices as the grid-induced incentive function under the assumption of perfect user predictions. The constraints on the state of charge guarantee the energy required for driving is delivered without failure. An average energy cost saving of 30% is realized at all penetrations. Nevertheless, the avalanche effect due to simultaneous charging during low price periods introduces new power peaks exceeding those of uncontrolled charging. This obstructs the grid-friendly integration of electric vehicles.
Background: Cardiovascular disease is the major cause of death worldwide. Although knowledge regarding diagnosing and treating cardiovascular disease has increased dramatically, secondary prevention remains insufficiently implemented due to failure among affected individuals to adhere to guideline recommendations. This has continued to lead to high morbidity and mortality rates. Involving patients in their healthcare and facilitating their active roles in their chronic disease management is an opportunity to meet the needs of the increasing number of cardio-vascular patients. However, simple recall of advice regarding a more preventive lifestyle does not affect sustainable behavioral lifestyle changes. We investigate the effect of plaque visualization combined with low-threshold daily lifestyle tasks using the smartphone app PreventiPlaque to evaluate change in cardiovascular risk profile. Methods: and study design: This randomized, controlled clinical trial includes 240 participants with ultrasound evidence of atherosclerotic plaque in one or both carotid arteries, defined as focal thickening of the vessel wall measuring 50% more than the regular vessel wall. A criterion for participation is access to a smartphone suitable for app usage. The participants are randomly assigned to an intervention or a control group. While both groups receive the standard of care, the intervention group has additional access to the PreventiPlaque app during the 12-month follow-up. The app includes daily tasks that promote a healthier lifestyle in the areas of smoking cessation, medication adherence, physical activity, and diet. The impact of plaque visualization and app use on the change in cardiovascular risk profile is assessed by SCORE2. Feasibility and effectiveness of the PreventiPlaque app are evaluated using standardized and validated measures for patient feedback.
The usage of data gathered for Industry 4.0 and smart factory scenarios continues to be a problem for companies of all sizes. This is often the case because they aim to start with complicated and time-intensive Machine Learning scenarios. This work evaluates the Process Capability Analysis (PCA) as a pragmatic, easy and quick way of leveraging the gathered machine data from the production process. The area of application considered is injection molding. After describing all the required domain knowledge, the paper presents an approach for a continuous analysis of all parts produced. Applying PCA results in multiple key performance indicators that allow for fast and comprehensible process monitoring. The corresponding visualizations provide the quality department with a tool to efficiently choose where and when quality checks need to be performed. The presented case study indicates the benefit of analyzing whole process data instead of considering only selected production samples. The use of machine data enables additional insights to be drawn about process stability and the associated product quality.
Tap or swipe
(2023)
Formen des Dialogs
(2023)
Armut im Blick?
(2023)
Highly-sensitive single-step sensing of levodopa by swellable microneedle-mounted nanogap sensors
(2023)
Microneedle (MN) sensing of biomarkers in interstitial fluid (ISF) can overcome the challenges of self-diagnosis of diseases by a patient, such as blood sampling, handling, and measurement analysis. However, the MN sensing technologies still suffer from poor measurement accuracy due to the small amount of target molecules present in ISF, and require multiple steps of ISF extraction, ISF isolation from MN, and measurement with additional equipment. Here, we present a swellable MN-mounted nanogap sensor that can be inserted into the skin tissue, absorb ISF rapidly, and measure biomarkers in situ by amplifying the measurement signals by redox cycling in nanogap electrodes. We demonstrate that the MN-nanogap sensor measures levodopa (LDA), medication for Parkinson disease, down to 100 nM in an aqueous solution, and 1 μM in both the skin-mimicked gelatin phantom and porcine skin.
The production of liquid-gas mixtures with desired properties still places high demands on process technology and is usually realized in bubble columns. The physical calculation models used have individual dimensionless factors which, depending on the application, are only valid for small ranges consisting of flow velocity, nozzle geometry and test setup. An iterative but time-consuming design of such dispersion processes is used in industry for producing a liquid-gas mixture according to desired requirements. In the present investigation, we accelerate the necessary design loops by setting up a physical model, which consists of several subsystems that are enriched by dedicated experiments to realize liquid-gas dispersions with low volume fraction and small air bubble diameters in oil. Our approach allows the extraction of individual dimensionless factors from maps of the introduced subsystems. These maps allow for targeted corrective measures of a production process for keeping the quality. The calculation-based approach avoids the need for performing iterative design loops. Overall, this approach supports the controlled generation of liquid-gas mixtures.
In 2021, a prominent Austria dairy producer suffered from an IT attack and was completely paralysed. Without clearly defined mitigation measures in place, major disruptions were caused alongside the whole supply chain, including logistics service providers, governmental food safety bodies, as well as retailers (i.e., supermarkets and convenience stores). In this paper, we ask the question how digitisation and digital transformation impact IT security, especially when considering the complex company ecosystems of food production and food supply chains in Austria. The problem statement stems from a gap in knowledge of key differences in approaches towards IT security, resilience, risk management and especially business interfaces between food suppliers, supermarkets, distributors, logistics and other service providers. In order to answer related research questions, firstly, the authors conduct literature research, and highlight common guidelines and standardisation as well as look at state-based recommendations for critical infrastructure. In a second step, the paper describes a quantitative and qualitative survey with Austrian food companies (producers and retailers) which is described in detail in the paper. A description of recommended measures for the industry, further steps, as well as an outlook conclude the paper.