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Organization of the central nervous system and innervation of cephalic sensory structures in the water bear Echiniscus testudo (Tardigrada: Heterotardigrada) revisited
(2021-06-15)
The tardigrade brain has been the topic of several neuroanatomical studies, as it is key to understanding the evolution of the central nervous systems in Panarthropoda (Tardigrada + Onychophora + Arthropoda). The gross morphology of the brain seems to be well conserved across tardigrades despite often disparate morphologies of their heads and cephalic sensory structures. As such, the general shape of the brain and its major connections to the rest of the central nervous system have been mapped out already by early ...
Aufsatz
Transcriptomic, peptidomic, and mass spectrometry imaging analysis of the brain in the ant Cataglyphis nodus
(2021-03-11)
Behavioral flexibility is an important cornerstone for the ecological success of animals. Social Cataglyphis nodus ants with their age-related polyethism characterized by age-related behavioral phenotypes represent a prime example for behavioral flexibility. We propose neuropeptides as powerful candidates for the flexible modulation of age-related behavioral transitions in individual ants. As the neuropeptidome of C. nodus was unknown, we collected a comprehensive peptidomic data set obtained by transcriptome analysis ...
Aufsatz
Comeback als demokratische Führungsmacht?
(2021-07-08)
Joe Biden stellt die US-Außenpolitik unter ein demokratisches Paradigma, will demokratische Allianzen festigen und hat einen „Gipfel für die Demokratie“ versprochen. Ziel ist es, das Gewicht freiheitlicher Staaten im Systemkonflikt mit Autokratien zu erhöhen. Bündnispartner in Europa und Asien reagieren skeptisch, fürchten eine Verhärtung der Konflikte mit China und Russland und den Verlust der Handlungsfreiheit. Wir plädieren für eine Allianz der Demokratien, mit Blick auf die Resilienz ihrer politischen Systeme und ...
Aufsatz
Betriebliche Mobilitätsmanagementmaßnahmen – ein Anstoß für Veränderungen in Mobilitätsverhalten und -einstellungen Mitarbeitender?
(2021-06-09)
Betriebliches Mobilitätsmanagement (BMM) fokussiert auf die Verkehrsgestaltung hinsichtlich Pendel- und Berufsverkehr, Dienstreisen und Kundenverkehr. Ziel ist es, beispielsweise Parkplatzauslastungen zu verringern oder Verhaltensänderungen bei den Mitarbeitenden hinsichtlich der Verkehrsmittelwahl hervorzurufen. Bisher ist BMM in Deutschland wenig implementiert und in geringem Umfang erforscht.
Vor diesem Hintergrund stellt dieser Artikel das Instrument BMM theoretisch dar und präsentiert ein zugehöriges ...
Aufsatz
Sustainable Development Goal Drivers in Food Systems
(2021-06-29)
Interacting driving forces in food systems, resulting in cumulative driver effects and synergies, induce non-linear processes in multiple directions. This paper critically reviews the discourse on driving forces in food systems and argues that mindset is the primary predictor for food system outcomes. In the epoch of sustainable development goals (SDGs) and the Anthropocene, mindset matters more than ever. Transformative narratives are beginning to transcend the dominant social paradigm, which is still driving the ...
Aufsatz
Investment Decisions with Endogeneity: A Dirichlet Tree Analysis
(2021-07-01)
Ignoring endogeneity when assessing investors’ decisions carries the risk of biased estimates for the influence of exogeneous marketing variables. This study shows how to overcome this challenge by using Pólya trees in the quantification of impacts on investors’ decisions. A total of 2255 investors recruited for this study received and opened a digital marketing newsletter about investing daily. Given the nature of investors’ decisions characterized by heterogeneity and endogeneity, the response model is assessed ...
Aufsatz
Influence of hot deformation on the precipitation hardening of high-strength aluminum AA7075 during thermo-mechanical processing
(2021-04-21)
The aim of this work was to investigate the effect of hot deformation on the aging behavior of precipitation-hardenable aluminum alloy AA7075 within a novel thermo-mechanical forming process, in order to gain insight into its precipitation kinetics. For this purpose, the material was formed at 420 °C after undergoing solution treatment to different strain levels ranging from 2% to 10% to obtain different dislocation densities. After undergoing hot deformation, aging at 120 °C with different parameters was carried out ...
Aufsatz
Drought stress triggers differential survival and functional trait responses in the establishment of Arnica montana seedlings
(2021-07-15)
- The establishment and survival of seedlings are critical stages in the life cycle of plants and therefore usually well timed to humid and favourable conditions. Climate projections suggest that the threatened mountain grassland species Arnica montana may be increasingly exposed to drought stress. However, studies that focus on the species’ early development are missing. We evaluated impacts of drought-induced stress on A. montana seedlings in their early establishment phase and identified traits that could cause ...
Aufsatz
Iterative feature detection of a coded checkerboard target for the geometric calibration of infrared cameras
(2021-08-11)
The geometric calibration of cameras becomes necessary when images should be undistorted, geometric image information is needed or data from more than one camera have to be fused. This process is often done using a target with a checkerboard or circular pattern and a given geometry. In this work, a coded checkerboard target for thermal imaging cameras and the corresponding image processing algorithm for iterative feature detection are presented. It is shown that, due in particular to the resulting better feature ...