Gestaltung nutzerzentrierter Assistenzen im Produktdatenmanagement

Die Verwaltung von Produkt- und Prozessdaten in industrieller Produktentstehung ist seit dem Aufkommen der rechnergestützten Assistenzsysteme einer der großen Hebel bei der Suche nach Effizienzsteigerungen. Neben dem Flugzeugbau ist es insbesondere die Automobilindustrie, an deren komplexen Arbeitsabläufen Neuerungen auf den Gebieten der Datenhaltung, -verwaltung und der prozessübergreifenden Zusammenarbeit erprobt werden. Die rechnergestützte Umsetzung entlang des Produktentstehungsprozesses hat zum Ziel, eine bessere Abbildbarkeit, Durchgängigkeit und Verfolgbarkeit der virtuellen Geschäftsobjekte und letztlich der tatsächlichen Produkte sicherzustellen. [... aus der Einleitung

Разработка приложения для покадровой обработки видео с помощью библиотеки классов AForge.NET

The following article describes libraries and classes for frame extraction from videofile and creating an RGB-histogram for those extracted frames.. As a result, it will help to develop a dynamic RGB-histogram creator

Digitale Arbeitsumgebungen in der Produktentstehung: Mit Action Design Research Web- Anwendungen zur produktiven Zusammenarbeit entwickeln

Um effektiv auf neue Marktgegebenheiten reagieren zu können, versuchen Industrieunternehmen ihre internen Geschäftsabläufe schlank und effizient zu halten. Dies stößt jedoch an Grenzen, wenn tradierte Unternehmens-IT im Zuge der digitalen Transformation mit neuen Geschäfts- und Bedienfähigkeiten ausgestattet werden soll. Die Integration von Systemen und Daten sowie die prozessuale Steuerung einer sich neu ordnenden IT-Landschaft verlangt nach neuen Konzepten, die die Besonderheit von kooperativen Wertschöpfungsprozessen berücksichtigen. Der Beitrag stellt die Anwendung der Action Design Research für die Konzeption, Entwicklung, Einführung und Auswertung einer IT-Applikation innerhalb eines Anwendungsfalls der Montageplanung der Automobilproduktion heraus. Dazu wird der Ansatz der Conversational Workflows, ein für die Zusammenarbeit in wissensintensiven, kooperativen Industrieprozessen entwickelter Applikationsaufbau, zur Lösung der Problemstellung herangezogen. Mit Hilfe eines auf den Anwendungsfall angepassten Ablaufs der Action Design Research werden in zwei partizipativen ADR-Zyklen sowohl eine MVP-Version als auch eine produktive Variante einer Web-Applikation für die Materialmodulbereitstellung entwickelt und im Praxissystem erlebbar gemacht. Im Ergebnis konnte sich das Konzept der Conversational Workflows als geeignet herausstellen und lässt zusätzlich Raum für kontinuierliche Weiterentwicklungen. Auf methodischer Seite hat sich gezeigt, dass eine Ergänzung der konzeptionellen ADR-Phasen um Design Thinking zu einer verbesserten Artefaktentwicklung beitragen kann

Structure-transport correlation reveals anisotropic charge transport in coupled PbS nanocrystal superlattices

Semiconductive nanocrystals (NCs) can be self-assembled into ordered superlattices (SLs) to create artificial solids with emerging collective properties. Computational studies have predicted that properties such as electronic coupling or charge transport are determined not only by the individual NCs but also by the degree of their organization and structure. However, experimental proof for a correlation between structure and charge transport in NC SLs is still pending. Here, we perform X-ray nano-diffraction and apply Angular X-ray Cross-Correlation Analysis (AXCCA) to characterize the structures of coupled PbS NC SLs, which are directly correlated with the electronic properties of the same SL microdomains. We find strong evidence for the effect of SL crystallinity on charge transport and reveal anisotropic charge transport in highly ordered monocrystalline hexagonal close-packed PbS NC SLs, caused by the dominant effect of shortest interparticle distance. This implies that transport anisotropy should be a general feature of weakly coupled NC SLs.Comment: 49 pages, 20 Figure

Reviews

Adam Makkai (ed.): In Quest of the 'Miracle Stag': The Poetry of Hungary. An Anthology of Hungarian Poetry from the 13th Century to the Present in English Translation. Vol. I. Chicago-Budapest: Atlantis-Centaur, M. Szivárvány and Corvina, 1996. LXVI + 964 pp. ; Der literaturgeschichtliche Fahrplan ; The Kiss: 20th Century Hungarian Short Stories Selected by István Bart. Budapest: Corvina Books, 1993. Fourth Printing, 1998. ; László Kósa (ed.): A Cultural History of Hungary Translated by Tünde Vajda. Budapest: Corvina Books/Osiris Kiadó, 1999. ; Gábor Tolcsvai-Nagy: A magyar nyelv stilisztikája [Hungarian Stylistics]. Budapest: Nemzeti Tankönyvkiadó, 1996

Response to comment on 'Amphibian fungal panzootic causes catastrophic and ongoing loss of biodiversity'

Lambert et al. question our retrospective and holistic epidemiological assessment of the role of chytridiomycosis in amphibian declines. Their alternative assessment is narrow and provides an incomplete evaluation of evidence. Adopting this approach limits understanding of infectious disease impacts and hampers conservation efforts. We reaffirm that our study provides unambiguous evidence that chytridiomycosis has affected at least 501 amphibian species

CD26-negative and CD26-positive tissue-resident fibroblasts contribute to functionally distinct CAF subpopulations in breast cancer

The origin of cancer-associated fibroblasts (CAFs) in cancer remains to be identified. Here, single-cell transcriptomics, in vivo and in vitro studies suggest that CD26+ and CD26- normal fibroblasts transform into distinct CAF subpopulations in mouse models of breast cancer

Observations of aerosols in the free troposphere and marine boundary layer of the subtropical Northeast Atlantic: discussion of processes determining their size distribution

During July 1994, submicron aerosol size distributions were measured at two sites on Tenerife, Canary Islands. One station was located in the free troposphere (FT), the other in the marine boundary layer (MBL). Transport toward these two sites was strongly decoupled: the FT was first affected by dust and sulfate-laden air masses advecting from North Africa and later by clean air masses originating over the North Atlantic, whereas the MBL was always subject to the northeasterly trade wind circulation. In the FT the submicron aerosol distribution was predominantly monomodal with a geometric mean diameter of 120 nm and 55 nm during dusty and clean conditions, respectively. The relatively small diameter during the clean conditions indicates that the aerosol originated in the upper troposphere rather than over continental areas or in the lower stratosphere. During dusty conditions the physical and chemical properties of the submicron aerosol suggest that it has an anthropogenic origin over southern Europe and that it remains largely externally mixed with the supermicron mineral dust particles during its transport over North Africa to Tenerife. Apart from synoptic variations, a strong diurnal variation in the aerosol size distribution is observed at the FT site, characterized by a strong daytime mode of ultrafine particles. This is interpreted as being the result of photoinduced nucleation in the upslope winds, which are perturbed by anthropogenic and biogenic emissions on the island. No evidence was found for nucleation occurring in the undisturbed FT. The MBL site was not strongly affected by European pollution during the period of the measurements. The MBL aerosol size distribution was bimodal, but the relative concentration of Aitken and accumulation mode varied strongly. The accumulation mode can be related to cloud processing of the Aitken mode but also to pollution aerosol which was advected within the MBL or entrained from the FT. No bursts of nucleation were observed within the MBL