Now showing items 1-10 of 41
Validation and generalizability of machine learning prediction models on attrition in longitudinal studies
Attrition in longitudinal studies is a major threat to the representativeness of the data and the generalizability of the findings. Typical approaches to address systematic nonresponse are either expensive and unsatisfactory (e.g., oversampling) or rely on the unrealistic assumption of data missing at random (e.g., multiple imputation). Thus, models that effectively predict who most likely drops out in subsequent occasions might offer the opportunity to take countermeasures (e.g., incentives). With the current study, ...
Dietary Quality of Women of Reproductive Age in Low-Income Settings: A Cross-Sectional Study in Kyrgyzstan
Dietary diversity and adequate nutrient intake are essential for conducting a healthy life. However, women in low-income settings often face difficulties in ensuring dietary quality. This research assessed relationships between the dietary diversity, nutrient adequacy, and socio-economic factors among women of reproductive age (WRA) in Kyrgyzstan. A cross-sectional study was undertaken in four locations, including two rural and two urban areas in the north and south of Kyrgyzstan. A survey with pre-coded and open-ended ...
Environmental and Economic Performance of CO₂-Based Methanol Production Using Long-Distance Transport for H₂ in Combination with CO₂ Point Sources: A Case Study for Germany
The use of CO₂-based hydrocarbons plays a crucial role in reducing the climate footprint for several industry sectors, such as the chemical industry. Recent studies showed that regions which are favorable for the production of CO₂-based hydrocarbons from an energy perspective often do not provide concentrated point sources for CO₂, which leads to an increased environmental impact due to the higher energy demand of direct air capture processes. Thus, producing H2 in regions with high renewable power potential and ...
Wenn man sich mit dem Thema „Agilität“ inhaltlich befasst, erscheint es nicht angeraten, es in erster Linie als ein einheitliches theoretisches Konstrukt oder Modell zu betrachten, das man auf seine interne logische Stimmigkeit seiner einzelnen Bestandteile und auf deren empirische Verankerung hin überprüft. Damit würde man Kriterien anlegen, bei denen von vorneherein offensichtlich ist, dass der agile Ansatz dem weder gerecht werden kann noch will. Die eigentliche Bedeutung des agilen Konzepts liegt nicht in seiner ...
Transmission Electron Microscopy Study on the Precipitation Behaviors of Laser-Welded Ferritic Stainless Steels and Their Implications on Intergranular Corrosion Resistance
The intergranular corrosion susceptibility of ferritic stainless-steel weldments is strongly dependent on chromium carbide precipitation phenomena. Hence, stabilization is widely used to mitigate the aforementioned precipitation. In contrast, stabilization has proved ineffective to fully prevent intergranular corrosion due to segregation of unreacted chromium during solid-state heat-treatments. To analyze the precipitation behavior of 17 wt.-% chromium ferritic stainless steels during laser welding, sheets of ...
Development of an Optical System Based on Spectral Imaging Used for a Slug Control Robot
The state-of-the-art technique to control slug pests in agriculture is the spreading of slug pellets. This method has some downsides, because slug pellets also harm beneficials and often fail because their efficiency depends on the prevailing weather conditions. This study is part of a research project which is developing a pest control robot to monitor the field, detect slugs, and eliminate them. Robots represent a promising alternative to slug pellets. They work independent of weather conditions and can distinguish ...
Rechte Radikalisierung und Deradikalisierung – Perspektiven in der psychologischen Beratung. Zum Film „Skin“ von Guy Nattiv
Vor dem Hintergrund des Films „Skin“ von Guy Nattiv (2018) wird ein Einblick in die Dynamiken von Radikalisierungsprozessen gegeben unter Einbeziehung einer multifaktoriellen Perspektive. In einem zweiten Schwerpunkt werden die Gelingens- und Rahmenbedingungen von Deradikalisierungsprozessen erörtert. Der Beitrag schließt mit der Darstellung eines Beratungsansatzes zur Deradikalisierung.
A study of 25 years of publication outputs in the German academic profession
In the weak evaluation state of Germany, full professors are involved in the traditional social governance partnership between the state, and the self-governing higher education institutions (HEI) and disciplinary associations. Literature suggests that formal and informal governance could trigger changes in academics’ publication behavior by valorizing certain publication outputs. In the article, secondary data from three surveys (1992, 2007 and 2018) is used for a multi-level study of the evolution of academics’ ...
A Critical Review on the Complex Potentials in Linear Elastic Fracture Mechanics
Introducing a crack in an elastic plate is challenging from the mathematical point of view and relevant within an engineering context of evaluating strength and reliability of structures. Accordingly, a multitude of associated works is available to date, emanating from both applied mathematics and mechanics communities. Although considering the same problem, the given complex potentials prove to be different, revealing various inconsistencies in terms of resulting stresses and displacements. Essential information on ...
Who wants to learn harder? The relationship between conservatism and liberalism, desirable difficulties, and academic learning
Previous work has shown that challenging learning strategies like desirable difficulties improve long-term learning. Nonetheless, because they might be regarded as strict and demanding learning strategies, they should not be perceived as positive by everyone. They should, however, fit conservative political attitudes since those are, among others, positively correlated with individuals’ need for order and structure as well as with challenging learning environments. Hence, we hypothesized conservative political attitudes ...