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Analysis of methods for prioritizing critical data transmissions in agricultural vehicular networks
(2020)
Applying wireless communication technologies to agricultural vehicular networks often results in high end-to-end delays and loss of packets due to intermittent or broken connectivity. This paper analyses the methods for the successful delivery of the vehicular data within acceptable delay times. Different kinds of data that are generated and transmitted in agricultural networks are considered in this paper, followed by the data prioritization methods which allow critical data to be prioritized against other data. In this regard, Enhanced Distributed Channel Access, Differentiated Services, and application-based data rate variation are discussed in conjunction with the Simple Network Management Protocol. These techniques are simulated or tested separately and then together and the results show that even in poor network conditions, high-prioritized data is not lost or delayed.
Studies on nutrition have historically concentrated on food-shortages and over-nutrition. The physiological states of feeling hungry or being satiated and its dynamics in food choices, dietary patterns, and nutritional behavior, have not been the focus of many studies. Currently, visual analytic using easy-to-use tooling offers applicability in a wide-range of disciplines. In this interdisciplinary pilot-study we tested a novel visual analytic software to assess dietary patterns and food choices for greater understanding of nutritional behavior when hungry and when satiated. We developed software toolchain and tested the hypotheses that there is no difference between visual search patterns of dishes 1) when hungry and when satiated and 2) in being vegetarian and non-vegetarian. Results indicate that food choices can be deviant from dietary patterns but correlate slightly with dish-gazing. Further, scene perception probably could vary between being hungry and satiated. Understanding t he complicated relationship between scene perception and nutritional behavioral patterns and scaling up this pilot-study to a full-study using our introduced software approaches is indispensable.
Der Einsatz von Augmented-Reality-Headsets eröffnet vielfältige Anwendungsmöglichkeiten und könnte auch in der Wundversorgung zur Anwendung kommen. Das Zusammenspiel mit der Nutzungsumgebung sowie die erweiterten Möglichkeiten der Interaktion erhöhen die Komplexität der Parameter, die bei der Gestaltung geeigneter Applikationen beachtet werden müssen. Daher verfolgt dieser Beitrag zwei Ziele. Als erstes werden Gestaltungsempfehlungen für Augmented-Reality-Applikationen für Headsets formuliert. Als zweites werden die zuvor formulierten Gestaltungsempfehlungen anhand eines Konzepts für eine Nutzeroberfläche zur Dokumentation chronischer Wunden demonstriert. Es wurde eine systematische Literaturrecherche durchgeführt. Von den 629 gefundenen Publikationen konnten 15 als relevant identifiziert werden. Die Inhalte der Publikationen wurden mithilfe einer qualitativen Inhaltsanalyse nach Mayring (2015) analysiert. Insgesamt konnten zehn Gestaltungsempfehlungen für Augmented-Reality-Applikationen generiert und anhand des Anwendungsfalls, der Dokumentation chronischer Wunden, demonstriert werden. Die präsentierten Gestaltungsempfehlungen können als Basis für die Entwicklung von Augmented-Reality-Applikationen insbesondere mit dem Fokus auf Headsets genutzt werden.
Nitrogen (N) pollution of groundwater bodies is often a result of high livestock densities combined with use of mineral N fertilisers in Northwest Germany, specifically in combination with sandy soils and high amounts of precipitation. Organic agriculture is discussed as an alternative management practice reducing nitrogen losses due to area-based livestock densities and waiving of mineral N fertilisers. A field trial with integrated ceramic suction cups over three years showed potential for reduced N loads under conventional management specifically with organic fertilisation. Now, the field trial is under transition into organic farming with promising additional benefits for drinking water quality and the great potential to develop optimised N management strategies.
To assess the effect of intercropping on malting quality a field trial with spring barley (Hordeum vulgare) and legume (pea) as well as non-legume (camelina and linseed) intercrops in two additive seeding ratios as well as sole cops was established in 2017 at the organic experimental station of University of Applied Sciences Osnabrück in North-Western Germany. Two tested malting barley cultivars (cv. Marthe and cv. Odilia) showed different performance, but all variants achieved brewing quality. Results after two years indicate that linseed and camelina were able to limit protein content. For best land-use efficiency of malting barley production intercropping with linseed showed best results. Mixed intercropping can help to promote internal efficiency loops and is therefore a promising sustainable intensification strategy for more resilient future crop production under changing climate conditions.
The market for external ratings is dominated worldwide as well as in the European Union (EU) by three major credit rating agencies (CRAs). These “Big Three” are Standard & Poor's (S&P), Moody's and Fitch Ratings. Due to the oligopolistic market structure and possible involvement in the 2008 financial crisis, the rating agencies have constantly come under criticism. This was associated with stricter regulatory requirements to ease the situation. The EU-Regulation on credit rating agencies („CRA-Regulation“) coming into force 2009 and its amendments in 2011 and in 2013 have mainly governed such regulation. The aim of the article is to analyse potential regulatory impact on the still inherent oligopolistic situation on the EU rating market in the context of the CRA-Regulation. Selected key figures are used to observe over a defined period of time if and how the dominance has changed. The motivation for this article is the observation, that political and private efforts to establish a European rating agency as a counterweight to the three major agencies and other approaches to increase competition in the rating market, followed, which has not been resounding to date. In summary, it is shown that new agencies have a potential impact on the EU rating market and that the three major rating agencies still dominate the market but within a changed environment.
Kurzfassung: Die vorliegende Untersuchung setzt sich mit den Problemfeldern der Personalauswahl und -entwicklung auseinander, welche die demografischen Veränderungen in Bezug auf Migration mit sich bringen. Explorativ soll die Ausprägung von sozialen und interkulturellen Kompetenzen und der Aspekt Diversity in Unternehmen untersucht werden. Hierzu wurden 69 Interviews durchgeführt und die intervallskalierten Selbsteinschätzungsskalen quantitativ verglichen. Die Ergebnisse zeigen, dass Mitarbeiter die Relevanz von Diversity-Einstellungen und Maßnahmen, Kompetenzen und Umsetzung dieser deutlich höher bewerten als die Führungskräfte. Die Ergebnisse weisen auf den Bedarf einer Kompetenzförderung hin, insbesondere in Bezug auf die interkulturelle Kompetenz.