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Multi-Objective Optimal Design and Development of a Four-Bar Mechanism for Weed Control
(2022-03-09)
Weeds compete with crops for water, nutrients, and light consequently, have adverse effects on the crop yield and overall productivity. Mechanical weeding is the most common non-chemical method for weed control, which is applied in organic farming, and the weed cultivator is the most common implement in mechanical weeding. This study aimed to design and develop an innovative active tool to optimize the cultivation depth, which can avoid damage to crop roots and improve the key performance indicators of an inter-row ...
Aufsatz
Lie algebra for rotational subsystems of a driven asymmetric top
(2022-05-11)
We present an analytical approach to construct the Lie algebra of finite-dimensional subsystems of the driven asymmetric top rotor. Each rotational level is degenerate due to the isotropy of space, and the degeneracy increases with rotational excitation. For a given rotational excitation, we determine the nested commutators between drift and drive Hamiltonians using a graph representation. We then generate the Lie algebra for subsystems with arbitrary rotational excitation using an inductive argument.
Aufsatz
Reversible Photo-Induced Reshaping of Imprinted Microstructures Using a Low Molecular Azo Dye
(2022-01-31)
A blend of low molecular azo glass (AZOPD) and polystyrene (PS) were used for the systematic investigation of photo-induced stretching and recovery of nanoimprinted structures. For this purpose, light and heat was used as recovery stimuli. The AZOPD/PS microstructures, fabricated with thermal nanoimprint lithography (tNIL), comprises three different shapes (circles, crosses and squares) and various concentrations of AZOPD fractions. The results show a concentrationdependent reshaping. Particularly the sample with 43 ...
Aufsatz
Current Research and Challenges in Bitumen Emulsion Manufacturing and Its Properties
(2022-03-09)
The global increase of road infrastructure and its impact on the environment requires serious attention to develop sustainable and environmentally friendly road materials. One group of those materials is produced by using bitumen emulsion. However, there are still scientific and technical obstacles standing against its regular application. The bitumen emulsion formulation process and compositional optimization are subjected to a high number of degrees of freedom. Consequently, obtaining the desired product is mostly ...
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The Vision of Self-Management in Cognitive Organic Power Distribution Systems
(2022-01-26)
Due to the ongoing trend towards a decarbonisation of energy use, the power system is expected to become the backbone of all energy sectors and thus the fundamental critical infrastructure. High penetration with distributed energy resources demands the coordination of a large number of prosumers, partly controlled by home energy management systems (HEMS), to be designed in such a way that the power system’s operational limits are not violated. On the grid level, distribution management systems (DMS) seek to keep the ...
Aufsatz
Electron Dynamics and Correlations During High-Order Harmonic Generation in Be
(2022-01-31)
We investigate theoretically the high-order harmonic generation in beryllium atom irradiated by a short 1850 nm linearly polarized laser pulse in the intermediate strong-field ionization regime with the Keldysh parameter of 0.85. To this end, the respective time-dependent Schrödinger equation is solved by the time-dependent restricted-active-space configuration-interaction (TD-RASCI) method. By systematically increasing the active space of included configurations, we demonstrate an individual effect of different ...
Aufsatz
Der Algorithmus, meine Arbeit und Ich – Einfluss von Algorithmen auf Content Creator:innen der Video Plattform YouTube
(2022-01-24)
Dieser Beitrag in der Zeitschrift „Gruppe. Interaktion. Organisation. (GIO)“ nimmt auf den Einfluss von Algorithmen der Video-Plattform YouTube auf den Arbeitsalltag von Content-Creator:innen Bezug. Für den Aufbau eines erfolgreichen, also Abonnent:innen-starken Kanals und einer beruflichen Tätigkeit als Content-Creator:in, müssen YouTuber:innen sich der Wirkweisen der eingesetzten Algorithmen bewusst sein. Es wird dargestellt, welchen Einfluss Spracherkennungs- und Analysealgorithmen auf die Sprache und das Verhalten ...
Aufsatz
Welchen Herausforderungen begegnen Kreativdirektor/innen in Werbeagenturen? Exploration einer neuen Zielgruppe für Beratung
(2022-03-18)
Obwohl creative leadership zu den buzzwords der letzten Jahre gehörte, sind Kreativdirektor/innen in Werbeagenturen von der Wissenschaft in Deutschland bislang unbeachtet geblieben. Die vorliegende qualitative Untersuchung hat im Rahmen von sechs Interviews mit Kreativdirektor/innen analysiert, welchen Herausforderungen diese Zielgruppe in ihrem Berufsalltag begegnen. Das Ergebnis der Untersuchung zeigt, dass neben der Vereinbarung von kreativem Arbeiten mit Führungsaufgaben neue Organisationsformen, der digitale ...
Aufsatz
High optical gain in InP-based quantum-dot material monolithically grown on silicon emitting at telecom wavelengths
(2022-04-01)
We describe the fabrication process and properties of an InP based quantum dot (QD) laser structure grown on a 5° off-cut silicon substrate. Several layers of QD-based dislocation filters embedded in GaAs and InP were used to minimize the defect density in the QD active region which comprised eight emitting dot layers. The structure was analyzed using high resolution transmission electron microscopy, atomic force microscopy and photoluminescence. The epitaxial stack was used to fabricate optical amplifiers which ...
Aufsatz
Development and Experimental Study of Smart Solar Assisted Yogurt Processing Unit for Decentralized Dairy Value Chain
(2022-04-04)
Yogurt production at the farm level is important for adding value to milk. In this study, a solar-assisted yogurt processing unit capable of performing the three processes of heating, fermentation, and cooling in a single unit was developed. It consisted of a circular chamber surrounded by a coil for heating by a solar vacuum tube collector and a pillow plate for cooling by a solar PV-powered chiller unit. Experiments were performed using 50, 40 and 30 L of raw milk under a constant water circulation rate of 50 L per ...