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We have demonstrated micromachining of bulk 3C silicon carbide (3C- SiC) wafers by employing 1028nm wavelength femtosecond laser pulses of energy less than 10 nJ directly from a femtosecond laser oscillator, thus eliminating the need for an amplified system and increasing the micromachining speed by more than four orders of magnitude.
Mobility choices - an instrument for precise automatized travel behavior detection & analysis
(2021)
Empirische Sozialforschung an sozialarbeiterischen Studiengängen österreichischer Fachhochschulen
(2012)
We present a new concept of 3D polymer-based 1 × 4 beam splitter for wavelength splitting around 1550 nm. The beam splitter consists of IP-Dip polymer as a core and polydimethylsiloxane (PDMS) Sylgard 184 as a cladding. The splitter was designed and simulated with two different photonics tools and the results show high splitting ratio for single-mode and multi-mode operation with low losses. Based on the simulations, a 3D beam splitter was designed and realized using direct laser writing (DLW) process with adaptation to coupling to standard single-mode fiber. With respect to the technological limits, the multi-mode splitter having core of (4 × 4) μm 2 was designed and fabricated together with supporting stable mechanical construction. Splitting properties were investigated by intensity monitoring of splitter outputs using optical microscopy and near-field scanning optical microscopy. In the development phase, the optical performance of fabricated beam splitter was examined by splitting of short visible wavelengths using red light emitting diode. Finally, the splitting of 1550 nm laser light was studied in detail by near-field measurements and compared with the simulated results. The nearly single-mode operation was observed and the shape of propagating mode and mode field diameter was well recognized.
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.
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.
The production of liquid-gas dispersions places high demands on the process technology, which requires knowledge of the bubble formation mechanisms, as well as the phase parameters of the media combinations used. To obtain the bubble sizes introduced to a flow not knowing the phase parameters, different process parameters are investigated. Their quality and applicability are evaluated. The results obtained make it possible to simplify long design processes of dispersion processes in manufacturing plants and to ensure the product quality of the products manufactured, by reducing waste.
Welche Politikziele geben Fachkräfte der Sozialen Arbeit an Eltern weiter, konkret was wird in Beratungen von Eltern explizit und implizit thematisiert und empfohlen? Der Artikel fokussiert auf die Herstellung von Geschlechterarrangements im Rahmen von Beratungssettings auf zwei Ebenen: einerseits zwischen Fachkräften und Eltern und andererseits zwischen den beratenen Eltern. Ausgehend von einer Heuristik, welche die Wirkung steuerungspolitischer Interventionen als Resultat der Deutung seitens der Adressierten begreift, stellt der Beitrag ein Instrument vor, mit dem Deutungen familienpolitischer Leistungen in der Beratung von Sozialarbeiter:innen und adressierten Eltern reflektiert werden können: das familienpolitische Brettspiel. Damit bietet das Beratungsinstrument eine Hilfestellung zur geschlechtersensiblen Adressierung der Eltern in Bezug auf ihre Arbeitsteilung.
Steigende Komplexität von Geschäftsmodellen und in der Niedrigzinsphase stets zulegende Renditeerwartungen an kapitalmarktorientierte Unternehmen führen dazu, dass sich deren Berichterstattung anpasst. Unter anderem ist eine verstärkte Verbreitung und Anwendung von Key Performance Indicators (alternative Führungsgrößen) in der Praxis zu beobachten. Wenigen, zwar prägnanten, aber eben nicht einheitlich definierten oder gar nach geltenden Rechnungslegungsnormen objektiv zu gewinnende Messgrößen kommt eine gesteigerte Bedeutung im externen Berichtswesen zu. Der Beitrag liefert eine Bestandesaufnahme der meist verwendeten Key Performance Indicators in der Praxis in Deutschland, in Österreich und in der Schweiz.
Comparison of constraint-handling mechanisms for the (1,λ)-ES on a simple constrained problem
(2016)
In this paper, we consider the question of data aggregation using the practical example of emissions data for economic activities for the sustainability assessment of regional bank clients. Given the current scarcity of company-specific emission data, an approximation relies on using available public data. These data are reported in different standards in different sources. To determine a mapping between the different standards, an adaptation to the Covariance Matrix Self-Adaptation Evolution Strategy is proposed. The obtained results show that high-quality mappings are found. Nevertheless, our approach is transferable to other data compatibility problems. These can be found in the merging of emissions data for other countries, or in bridging the gap between completely different data sets.
Grid-scale electrical energy storage (EES) is a key component in cost-effective transition scenarios to renewable energy sources. The requirement of scalability favors EES approaches such as pumped-storage hydroelectricity (PSH) or compressed-air energy storage (CAES), which utilize the cheap and abundant storage materials water and air, respectively. To overcome the site restriction and low volumetric energy densities attributed to PSH and CAES, liquid-air energy storage (LAES) has been devised; however, it suffers from a rather small round-trip efficiency (RTE) and challenging storage conditions. Aiming to overcome these drawbacks, a novel system for EES is developed using solidified air (i.e., clathrate hydrate of air) as the storable phase of air. A reference plant for solidified-air energy storage (SAES) is conceptualized and modeled thermodynamically using the software CoolProp for water and air as well as empirical data and first-order approximations for the solidified air (SA). The reference plant exhibits a RTE of 52% and a volumetric storage density of 47 kWh per m3 of SA. While this energy density relates to only one half of that in LAES plants, the modeled RTE of SAES is comparable already. Since improved thermal management and the use of thermodynamic promoters can further increase the RTEs in SAES, the technical potential of SAES is in place already. Yet, for a successful implementation of the concept - in addition to economic aspects - questions regarding the stability of SA must be first clarified and challenges related to the processing of SA resolved.
Zusammenfassung: Eine umfassende Literaturrecherche (Comprehensive Literature Search, CLS) bezeichnet eine umfangreiche und aufwändige Recherche mit dem Ziel, möglichst alle Studien zur Beantwortung einer zugrundeliegenden Forschungsfrage im Rahmen einer systematischen Übersichtsarbeit zu identifizieren. Konkrete Empfehlungen oder eine Definition des Begriffs CLS gibt es jedoch nicht. Der vorliegende Beitrag führt in eine Rahmung der CLS ein, stellt die damit einhergehenden Herausforderungen dar und weist auf methodische Implikationen sowie mögliche zukünftige Forschungsbereiche hin.
Bridges between families
(2016)
This paper examines the determinants of subnational location choice of Japanese multinational enterprises (JMNEs) in India to investigate whether or not conventional investment behaviour as ‘foot-loose’ and one-off investments has given way to an agglomeration logic as Japanese foreign direct investment has intensified. Using geographic information system analysis of investment project numbers, we find that Japanese MNE behaviour in India is evolving, with complementing but complex subnational interactions of economic, institutional and infrastructure factors serving as strong determinants of location choice consistently across key phases of India’s liberalization. We argue that Japanese investment decisions in India have followed a self-reinforcing dynamic whereby prior investments indeed attract further investment.