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Aufsatz
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Combined Funnel, Concentrator, and Particle Valve Functional Element for Magnetophoretic Bead Transport Based on Engineered Magnetic Domain Patterns
(2023-10-27)
Controlled actuation of superparamagnetic beads (SPBs) within a microfluidic environment using tailored dynamic magnetic field landscapes (MFLs) is a potent approach for the realization of point-of-care diagnostics within Lab-on-a-chip (LOC) systems. Making use of an engineered magnetic domain pattern as the MFL source, a functional LOC-element with combined magnetophoretic “funnel”, concentrator, and “valve” functions for micron-sized SPBs is presented. A parallel-stripe domain pattern design with periodically ...
Aufsatz
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Differences in enteric methane emissions across four dairy production systems in the urbanizing environment of an Indian megacity
(2024-01-17)
Low- and middle-income countries (LMICs) are rapidly urbanizing, leading to a high demand for high-quality animal products. Production increase is seen as a key to meeting this demand and reducing the global environmental impact of low-yielding dairy production system (DPS) often found in LMICs. Therefore, the present study assesses the relationship between enteric methane emissions and different dairy production strategies, taking DPS in the rural–urban interface of Bengaluru, an Indian megacity, as a case study. ...
Aufsatz
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UVC Irradiation as a Surface Treatment of Polycarbonate to Generate Adhesion to Liquid Silicone Rubber in an Overmolding Process
(2024-04-18)
This study investigates the adhesion properties of polycarbonate (PC) and liquid silicone rubbers (LSR) through surface activation using ultraviolet C (UVC) radiation. While self-adhesive LSRs adhere easily to certain thermoplastic composites such as polybutylene terephthalate (PBT) and polyamides (PAs), bonding to PC typically requires surface treatment due to the lack of compatible functional groups. Previous methods like plasma or flame treatment have been effective, but the use of UVC radiation for surface ...
Aufsatz
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Towards collaborative planning: deliberative knowledge utilisation and conflict resolution in urban regeneration in South China
(2024-03-22)
Urban regeneration in post-reform China has become a fertile ground for the transition towards collaborative planning, which serves as a powerful tool for managing conflicts and addressing complex urban challenges. This article aims to delve into the micro-level processes that underpin the emergence of collaborative planning in practical urban regeneration projects in China. By shedding light on these micro-level processes of conflict resolution, we aim to provide a deeper understanding of how collaborative planning ...
Aufsatz
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Labour relations and working conditions of workers on smallholder cocoa farms in Ghana
(2023-06-16)
The millions of farm workers in the Global South are an important resource for smallholder producers. However, research on their labour organisation is limited. This article focuses on smallholder farm workers in Ghana’s cocoa sector, drawing on insights from qualitative interviews and the concept of bargaining power. We review the labour relations and working conditions of two historical and informally identified labour supply setups (LSSs) in Ghana’s cocoa sector, namely, hired labour and Abusa, a form of ...
Aufsatz
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A Novel Thermo-Mechanical Processing Route Exploiting Abnormal Grain Growth in Heusler-Type Co–Ni–Ga Shape Memory Alloys
(2022-10-04)
Heusler-type Co–Ni–Ga shape memory alloys attracted significant scientific attention owing to excellent superelasticity in single-crystalline state. However, due to pronounced anisotropy, polycrystalline Co–Ni–Ga suffers from transformation-induced constraints at grain boundaries and, thus, premature failure upon thermo-mechanical loading. The present study reports on a novel thermo-mechanical processing route. Hot rolling followed by solution-annealing promotes abnormal grain growth, eventually leading to high-performance ...
Aufsatz
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Post-Carolingian Geographies of North and West in Rodulfus Glaber
(2023-12-14)
This article evaluates the geographical consciousness of north and west found in the Five Books of the Histories by the eleventh-century Burgundian monk Rodulfus Glaber. In contrast with dominant approaches to medieval geography that have informed prior commentators, who have focused on ideas of Europe or the opposition of east and west, it argues that we must situate Glaber's spatial consciousness first and foremost in the lineage of Carolingian and post-Carolingian conceptions of the north. Focusing especially on ...
Aufsatz
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Cooling rate as a process parameter in advanced roll forming to tailor microstructure,mechanical and corrosion properties of EN AW 7075 tubes
(2022-12-14)
The effects of solution heat treatment parameters and quench media as a processing tool for tailoring microstructure, mechanical and corrosion properties in roll forming of EN AW 7075 alloy were studied. The highest yield stress and ultimate tensile strength were obtained for the specimens quenched in water, while the air-cooled specimens exhibited inferior mechanical properties. Microstructural analysis of specimens showed that except water-quenched specimens, the parts cooled/quenched in oil, in direct contact with ...
Aufsatz
![Open Access](/themes/Mirage2/images/Open_Access_logo_PLoS_transparent.svg)
A hitchhiker’s guide: estimates of microbial biomass and microbial gene abundance in soil
(2024-03-19)
Information on microbial biomass carbon (MBC) is crucial to assess their stocks and role for plant nutrient release in soil. Next to fumigation-extraction, molecular methods are routinely used to estimate the contribution of fungi, bacteria, and archaea to the soil microbial community. However, more information on the links between these different indices would deepen the understanding of microbial processes. The current study is based on 11 datasets, which contain MBC and MBN data obtained by fumigation-extraction ...
Aufsatz
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Gesundheit und Studienpensum von Studierenden: Ergebnisse eines Gesundheitssurveys an der Universität Kassel
(2023-04-28)
Einleitung
Über Gesundheit und Krankheit von Studierenden ist relativ wenig bekannt und die Auswirkungen auf den Studienerfolg sind kaum erforscht. Das Ziel der Studie ist, Assoziationen zwischen dem Gesundheitszustand von Studierenden und dem absolvierten Studienpensum zu analysieren.
Methoden
Es nahmen 3330 von 23.699 immatrikulierten Studierenden der Universität Kassel an der freiwilligen Befragung („computer assisted web interviews“) im März 2022 teil. Die Rücklaufquote betrug 14,1 % unter Bedingungen der ...