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Vertrauen und Führung im Kontext digitaler Arbeit
(2020-04-16)
Der vorliegende Beitrag der Zeitschrift „Gruppe. Interaktion. Organisation. (GIO)“ untersucht die Relevanz von Vertrauen zwischen Führungskraft und Mitarbeiter im Kontext der Digitalisierung und kommt zu dem Ergebnis, dass Vertrauen in Zukunft noch bedeutsamer wird. Der Beitrag gelangt zu dieser Erkenntnis, indem er die psycho-sozialen Auswirkungen der Digitalisierung auf organisationaler Ebene identifiziert und systematisch die möglichen Wirkzusammenhänge zu Vertrauen analysiert. Die Analyse ergibt, dass sich die ...
Aufsatz
Soil–climate contribution to DNDC model uncertainty in simulating biomass accumulation under urban vegetable production on a Petroplinthic Cambisol in Tamale, Ghana
(2020-03-24)
Crop yield simulation using the Denitrification–Decomposition (DNDC) model can help to understand key bottlenecks for improved nitrogen (N) use efficiency and estimate greenhouse gas (GHG) emissions in West African urban vegetable production. The DNDC model was successfully calibrated using high‐resolution weather records, information on management practices and soils, and measured biomass accumulation and N uptake by amaranth (Amaranthus L.), jute mallow (Corchorus olitorius L.), lettuce (Lactuca sativa L.), and ...
Aufsatz
The Role of Institutional Uncertainty for Social Sustainability of Companies and Supply Chains
(2020-04-06)
Global sourcing largely occurs from so-called emerging markets and developing economies (EMDEs). In these contexts, substantial leverage effects for sustainability in supply chains (SCs) can be expected by reducing adverse impacts on society and minimising related risks. For this ethical end, an adequate understanding of the respective sourcing contexts is fundamental. This case study of South Africa’s (SA) mining sector uses institutional theory and the notion of institutional uncertainty to empirically analyse the ...
Aufsatz
No Robust Effect of Distributed Practice on the Short- and Long-Term Retention of Mathematical Procedures
(2020-04-29)
We investigated the effect of distributed practice and more specifically the “lag effect” concerning the retention of mathematical procedures. The lag effect implies that longer retention intervals benefit from longer inter-study intervals (ISIs). University students (N = 235) first learned how to solve permutation tasks and then practiced this procedure with an ISI of zero (i.e., massed), one, or 11 days. The final test took place after one or five weeks. All conditions were manipulated between-subjects. Contrary ...
Aufsatz
A Hybrid Optimization Method Combining Network Expansion Planning and Switching State Optimization
(2020-07-01)
Combining switching state optimization (SSO) and network expansion planning (NEP) in AC systems results in a mixed-integer non-linear optimization problem. Two methodically different solution approaches are mathematical programming and heuristic methods. In this paper, we develop a hybrid optimization method combining both methods to solve the combined optimization of SSO and NEP. The presented hybrid method applies a DC programming model as an initialization strategy to reduce the search space of the heuristic. A ...
Aufsatz
Investment Barriers and Labeling Schemes for Socially Responsible Investments
(2020-02-21)
Given the increasing role of socially responsible investing (SRI), but still limited participation of individual (i.e. small, retail) investors, the objective of this study is twofold: (i) We aim to identify investment barriers regarding SRI for individual investors and analyze to what extent these barriers vary across different investor groups. (ii) We analyze to what extent sustainability or transparency labels can help to overcome these barriers. To this end, we empirically analyze data from a survey and a stated ...
Aufsatz
Compiling Measurement Invariant Short Scales in Cross‐Cultural Personality Assessment Using Ant Colony Optimization
(2020-04-26)
Examining the influence of culture on personality and its unbiased assessment is the main subject of cross‐cultural personality research. Recent large‐scale studies exploring personality differences across cultures share substantial methodological and psychometric shortcomings that render it difficult to differentiate between method and trait variance. One prominent example is the implicit assumption of cross‐cultural measurement invariance in personality questionnaires. In the rare instances where measurement ...
Aufsatz
Spatio-Temporal Dynamics of Algae and Macrophyte Cover in Urban Lakes: A Remote Sensing Analysis of Bellandur and Varthur Wetlands in Bengaluru, India
(2020-11-23)
Rapid urbanization processes and indiscriminate disposal of urban wastewaters are major causes for anthropogenic lake-sediment deposition and eutrophication. However, information about the spatial and temporal variation of macrophyte and phytoplankton distribution as indicators for water contamination is limited. To gain insights into the dynamics, we analyzed lake-cover changes of Bellandur and Varthur Lake in the S-Indian megacity of Bengaluru for the post-rainy seasons of the years 2002–2019. Supervised maximum ...
Aufsatz
Probabilistic upscaling and aggregation of wind power forecasts
(2020-03-16)
Background
Wind power forecasts of the expected wind feed-in for the next hours or days are necessary to integrate the generated volatile wind energy into power systems. Most forecasting models predict in some sense the best value, but they ignore the other possible outcomes which may arise because of forecasting uncertainties. Probabilistic forecasts, on the other hand, also predict a distribution of possible outcomes with their respective probabilities that specific power values will occur and therefore have higher ...
Aufsatz
Mapping the field of research on African higher education: a review of 6483 publications from 1980 to 2019
(2020-11-16)
Following a global trend, higher education (HE) in Africa has also become a complex enterprise, potentially demanding specific expertise in higher education research. However, despite this, there is a dearth of analysis into the state of research on African HE. This paper seeks to fill this gap by mapping and analysing African HE research. We undertake a systematic review of 6483 articles and books focusing on African HE published from 1980 to 2019 in indexed and non-indexed journals and book-publishers. We particularly ...