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Boxwood Borer Heterobostrychus brunneus (Coleoptera: Bostrichidae) Infesting Dried Cassava: A Current Record from Southern Ethiopia
(2017-01-27)
Insect specimens of adult beetles and larvae of 7–9 and 9–10 mm length, respectively were collected from infested dry cassava at two locations from multiple stores in southern Ethiopia. The specimens were identified as Heterobostrychus brunneus (Murray, 1867) commonly known as boxwood borer and auger beetle. The study presents a current record of H. brunneus in Ethiopia, particularly in the context of infesting food products. Additionally, a wide geographical distribution of the pest was reviewed and presented in ...
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Das pandemische Manifest
(Oekom verlag, 2021-09-17)
Die Corona-Krise wird häufig als Zeitenwende beschrieben. Zwei Wege scheinen von nun an möglich: Der eine überhöht den vorpandemischen Zustand als positiv besetzte Normalität und dreht das Rad zurück. Doch wir können nicht zum Normalen zurück. Denn das Normale war das Problem.
Der andere Weg zieht Lehren aus der Pandemie und beginnt, unser Zusammenleben neu auszubuchstabieren. Der Horizont ist klar: Die Reduzierung von Ungleichheit ohne Gleichmacherei; die Begründung einer freien und leistungsgerechten ...
Aufsatz
Diversity of Trametes (Polyporales, Basidiomycota) in tropical Benin and description of new species Trametes parvispora
(2020-03-10)
Trametes is a globally distributed genus of white-rot polypores and well sampled in temperate and boreal areas. However, the diversity, taxonomy, and phylogenetic positions of Trametes spp. are poorly known in tropical Africa. This study aims at documenting the diversity of Trametes species in Benin (tropical Africa) and their phylogenetic positions with a focus on the T. elegans species complex. Therefore, we collected specimens of Trametes from different forest types across Benin. To infer phylogenetic relationships ...
Aufsatz
Single-wall carbon nanotubes-chitosan nanocomposites: Surface wettability, mechanical and thermal properties
(2021-04-14)
Functionalized single-wall carbon nanotubes (f-SWCN) are dispersed in chitosan films by self-assembly of both components in aqueous media. This carbon form is a promising nanofiller to achieve nanocomposites with refined thermal, mechanical and surface features. In this study, we investigated the influence of functionalized single-wall carbon nanotubes concentration on the resulting properties of the nanocomposites structures. Functionalized single-wall carbon nanotubes are dispersed on a molecular scale in the ...
Aufsatz
The “Nested” Power of TNCs: Smallholders’ Biggest Challenge
(2021-07-15)
The plight of smallholder farmers vis-à-vis their highly concentrated input providers and distributors is well known. This article highlights the embeddedness of dyadic power relations within broader economic, political, and social institutions governing the relations between transnational corporations (TNCs) and smallholders. It provides a Gramscian gaze into the deep roots of TNCs in the neoliberal historic bloc and argues that challenging the power of the TNCs requires a comprehensive strategy that goes much beyond ...
Aufsatz
A note on dual prehomomorphisms from a group into the Margolis–Meakin expansion of a group
(2020-08-07)
We give a category-free order theoretic variant of a key result in Auinger and Szendrei (J Pure Appl Algebra 204(3):493–506, 2006) and illustrate how it might be used to compute whether a finite X-generated group H admits a canonical dual prehomomorphism into the Margolis–Meakin expansion M(G) of a finite X-generated group G. We show that for G the Klein four-group a suitable H must be of exponent 6 at least and recapture a result of Szakács.
Aufsatz
The Long-Term Benefit of Video Modeling Examples for Guided Inquiry
(2019-10-01)
Inquiry-based learning can be considered a critical component of science education in which students can assess their understanding of scientific concepts and scientific reasoning skills while actively constructing new knowledge through different types of activity levels (Klahr and Dunbar, 1988; Bell et al., 2005; Hmelo-Silver et al., 2007; Mayer, 2007). However, engaging in inquiry activities can be cognitively demanding for students, especially those with low prior knowledge of scientific reasoning skills (reasoning ...
Aufsatz
Annual industrial and commercial heat load profiles: modeling based on k-Means clustering and regression analysis
(2021-05-20)
An accurate method to predict annual heat load profiles is fundamental to many studies, e.g., preliminary design or potential studies on renewable heating systems. This study presents a method to predict annual heat load profiles with a daily resolution for industry and commerce, based on an analysis of 797 natural gas load profiles (≥1.5 GWh/a). To derive heat load profiles, these natural gas load profiles are normalized and those with a potentially non-linear relationship between heat demand and natural gas consumption ...
Aufsatz
Casimir-Polder interaction of neutrons with metal or dielectic surfaces
(2021-07-15)
We predict a repulsive Casimir–Polder-type dispersion interaction between a single neutron and a metal or dielectric surface. We consider a scenario where a single neutron is subject to an external magnetic field. Due to its intrinsic magnetic moment, the neutron then forms a magnetisable two-level system which can exchange virtual photons with a nearby surface. The resulting dispersion interaction between a purely magnetic object (neutron) and a purely electric one (surface) is found to be repulsive, in contrast to ...
Aufsatz
Generating Causal Relations in Scientific Texts: The Long-Term Advantages of Successful Generation
(2019-02-05)
A high level of text comprehension can be achieved by engaging learners in processes of organization and integration while reading a cohesive text. In the present study, we investigated the impact of an innovative generative technique on learning with scientific texts. The cohesion generation was implemented by means of explicit cohesion gaps. High school students (n = 199) were randomly assigned to either receive a fully cohesive scientific text (control condition) or a scientific text that required the selection ...