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Aufsatz
Nutrient and oil profile of Escamol, an edible larva of ants (Liometopum apiculatum Mayr)
(2021-05-25)
The objective of this study was to evaluate proximal chemical analysis, oil and fatty acids in escamol dehydrated and butter-fried that are commercially available in Mexico. In order to measure the escamol and oil quality, a chemical analysis were performed. The identification fatty acids was by refractive index. The proximal chemical analysis results in escamol fresh and deshydrated indicated that moisture (56.00-1.89 %), protein (15.30-34.78 %), lipids (20.05-45.57 %), ash (1.91-4.35 %) and carbohydrates (6.73-13.41 ...
Aufsatz
CuCrZr processed by laser powder bed fusion — Processability and influence of heat treatment on electrical conductivity, microstructure and mechanical properties
(2021-06-16)
CuCrZr parts were fabricated by laser beam powder bed fusion (LB-PBF) technique and subjected to different heat treatments. As a result, four different conditions were considered for further investigations, that is, the as-built condition, conditions of maximum hardness (MH) and maximum electrical conductivity (MC), and a condition representing a compromise between hardness and conductivity (H&C). Microstructural evolution and performance under monotonic and cyclic loading were studied. Fracture surfaces revealed ...
Aufsatz
Trust and the clean food imaginaries: an analysis of a short food supply chain from Romania
(2021-05-25)
As concerns about food safety and environmental issues gain more attention in the public eye, organic labels are growing in popularity, being presented as the solution for a more sustainable and conscious food system. Yet, organic certificates did not manage to actively change the food system but merely created a niche to be exploited, thus many of the environmental-friendly practices being co-opted by corporations without addressing the larger issues of concern. This paper looks at how small producers, who are ...
Dissertation
Ferrocen-basierte N-heterocyclische Tetrylene mit tertiären Alkylsubstituenten an den Stickstoff-Atomen
(2020)
In 2009, our group published two stable N-heterocyclic carbenes (NHCs) with a 1,1'-ferrocenediyl backbone (fc), which formally exhibit a six-membered FeIIC2N2CII-heterocycle. The stabilization of the fcNHCs is favored by bulky N-substituents. So far neopentyl and 2-adamantyl have been used for this purpose - a bulky primary and secondary alkyl substituent. In contrast to other cyclic diaminocarbenes, the fcNHCs are capable of activating small molecules such as NH3 or CO. The reason for this remarkable ability is the ...
Aufsatz
Thermal Stability of Residual Stresses in Differently Deep Rolled Surface Layers of Steel SAE 1045
(2021-05-07)
The stability of compressive residual stresses generated by deep rolling plays a decisive role on the fatigue behavior of specimens and components, respectively. In this regard, deep rolling at elevated temperature has proven to be very effective in stabilizing residual stresses when fatigue analysis is conducted at ambient temperature. However, since residual stresses can be affected not only by plastic deformation but also when thermal energy is provided, it is necessary to analyze the influence of temperature and ...
Dissertation
A Self-Organising Multi-Agent Knowledge Base
(2021-12)
Digitale Städte sind zunehmend auf IT- und Kommunikationsinfrastruktur angewiesen. Sie können als große verteilte Systeme betrachtet werden, die aus heterogenen und autonomen Teilnehmern bestehen. Besonders in Notfall- und Krisensituationen muss kritisches Wissen, beispielsweise über verletzte Personen oder beschädigte Infrastruktur, zuverlässig auch unter eingeschränkter Kommunikation erreichbar sein. In einer solchen Umgebung würde eine zentrale Verwaltung des kritischen Wissens einen Engpass verursachen. Daher ...
Dissertation
The Acceptance of Serious Games by Mental Health Service Users and Mental Health Professionals: An International Comparison Study
(2021)
Research aim. This study investigates which determinants predict the intention to use SG in psychotherapeutic settings among both relevant application groups: mental health service users (individuals with psychotherapy experience either currently or in the past) and mental health professionals. Since ethnicity, socioeconomic status, and culture highly interplay with (e-mental health) technology uptake (Clough et al., 2019), SG acceptability was assessed in several countries (N = 13) by particularly considering the ...
Preprint
Identifying critical demand scenarios for the robust capacitated network design problem using principal component analysis
(2021-11-30)
In this paper, we consider the single-commodity robust network design problem. Given an undirected graph with capacity installation costs on its edges and a set S of scenarios with associated flow balance vectors that represent different scenarios of node supplies and demands, the goal is to find integer edge capacities that minimize the total installation cost and permit a feasible single commodity flow for each scenario. This problem arises, for example, in the design of power networks, which are dimensioned to ...
Dissertation
Untersuchungen zur Synthese, Reaktivität und Struktur von unsymmetrisch substituierten Phospholen
(2021)
In Rahmen dieser Arbeit wurden Phosphole mit unterschiedlichen Funktionalisierungen hergestellt und charakterisiert. Die Verwendung von unsymmetrisch substituierten 1,4-Diinen resultierte in Produkten, die aufgrund ihres Substitutionsmusters ein stereogenes Zentrum am Phosphoratom besitzen. Phosphole, insbesondere ihre β-H-Derivate, zeichnen sich durch ihre exzellenten lumineszenten Eigenschaften aus. Diese machen sie für vielfältige Anwendungen interessant. So gibt es im Bereich der OLED-Entwicklung bereits ...
Dissertation
Kann Selbsthilfe-Wohnungsbau sozial sein?
(LIT-VerlagArchimed Verlag, 2021)
Wohnungen des gewerblichen Sektors sind in den Ländern Lateinamerikas für die Mehrheit der Bevölkerung nicht erschwinglich, während die staatlich geförderten Wohnungen in der Regel nur einen geringen Bruchteil des Bedarfs abdecken. Deswegen wird die Mehrheit aller Wohnungen in Selbsthilfe erstellt. Von vielen Wissenschaftlern wird der faktische Zwang zum Selbstbau als doppelte Ausbeutung marktwirtschaftlich organisierter Ökonomien kritisiert, da der Erlös der seitens der Bevölkerung produzierten Güter bzw. erbrachten ...