Development of a form-flexible handling technology with active cooling for hybrid components in forging processes

Tailored Forming is a novel manufacturing process for the production of forged hybrid components. In contrast to components made of mono-materials, hybrid components can be adapted to the respective loads by combining different materials with contradictory properties. Short processing times and high component quality, however, lead to the demand for automated handling and local active cooling within the forming process, since the appropriate processing temperature is particularly important. Due to the fact that the hybrid components are differently hot and change their shape during the forming process, a special gripper system must be provided, which can withstand high temperatures, and ensures both shape variability and local cooling. Nowadays, however, there is a gap between shape variable grippers and rigid grippers for temperature-sensitive processes without any integrated cooling functionalities. Therefore, this paper presents an approach for the development of shape variable high temperature grippers with the use-case of handling hot steel-aluminium hybrid components

Modelling and Evaluating the Heat Transfer of Molten Thermoplastic Fabrics in Automated Handling Processes

Modern manufacturing processes for lightweight parts and products have to face new challenges regarding the changed material properties. For instance, one of the upcoming new lightweight materials, which focusses on a large scale production, is the so called organo-sheet. An Organo-sheet is a continuous fiber reinforced thermoplastic which has to be processed above melting temperature. At this temperature, the organo-sheet loses its stiffness and changes into a limp state. In this state, it is possible to form the flat organo-sheet into three dimensional shapes. However, the heat transfer to the environment, such as the air, the forming-tool or the robot gripper, causes a fast cooling. To identify the thermal properties, this paper focuses on the analysis and characterisation of common robot grippers for handling heated organo-sheets in fully automated manufacturing processes. The paper presents the results of handling experiments using conventional suction-, needle- and clampgripper as well as a heated needlegripper. In addition, a heat transfer modelling approach is introduced

Waiving Article Processing Charges for Least Developed Countries. A Brick Stone of a Large-scale Open Access Transformation.

Taubert NC, Bruns A, Lenke C, Stone G. Waiving Article Processing Charges for Least Developed Countries. A Brick Stone of a Large-scale Open Access Transformation. UKSG Insights. 2021;34(1):1.This article investigates the question, if it is economically feasible for a largepublishing house to waive article processing charges for the group of 47 so called least developed countries (LDC). As an example Springer-Nature is selected. The analysisis based on the Web of Science, OpenAPC and the Jisc collections Springer compact journal list. As a result, it estimates an average yearly publication output of 520 publications (or a share of 0.26% of the worldwide publication output in Springer-Nature journals) for the LDC country group. The loss of revenues for Springer-Naturewould be 1,1 million $ if a waiver would be applied for all of these countries. Giventhat money is indispensable for development in the case of LDC (e.g. life expectancy,health, education), it is not only desirable but also possible in economic terms for apublisher like Springer-Nature to waive APCs for these countries without much loss inrevenues

Objective, comparative assessment of the penetration depth of temporal-focusing microscopy for imaging various organs

Temporal focusing is a technique for performing axially resolved widefield multiphoton microscopy with a large field of view. Despite significant advantages over conventional point-scanning multiphoton microscopy in terms of imaging speed, the need to collect the whole image simultaneously means that it is expected to achieve a lower penetration depth in common biological samples compared to point-scanning. We assess the penetration depth using a rigorous objective criterion based on the modulation transfer function, comparing it to point-scanning multiphoton microscopy. Measurements are performed in a variety of mouse organs in order to provide practical guidance as to the achievable penetration depth for both imaging techniques. It is found that two-photon scanning microscopy has approximately twice the penetration depth of temporal-focusing microscopy, and that penetration depth is organ-specific; the heart has the lowest penetration depth, followed by the liver, lungs, and kidneys, then the spleen, and finally white adipose tissue.National Institutes of Health (U.S.) (NIH-5-P41-EB015871-27)National Institutes of Health (U.S.) (DP3-DK101024 01)National Institutes of Health (U.S.) (1-U01-NS090438-01)National Institutes of Health (U.S.) (1-R01-EY017656 -0,6A1)National Institutes of Health (U.S.) (1-R01-HL121386-01A1)National Institutes of Health (U.S.) (NIH 5U54 CA151884-04)National Institutes of Health (U.S.) (9-P41-EB015871-26A1

Heated gripper concept to optimize heat transfer of fiber-reinforced-thermoplastics in automated thermoforming processes

Today composite materials become increasingly more common to use for lightweight applications. This paper introduces a simulation approach for a handling and forming process. This process focusses on the robot based gripping, handling and forming of continuous-fiber-reinforced-thermoplastics, such as organo-sheet. The results of this paper show a manufacturing study of the heat transfer of a temperature-elevated organo-sheet during handling using heated needlegripper. Beside the fabric deformation, this research focuses on the temperature distribution during forming. Fast temperature drops lead to an increasing stiffness of the thermoplastic. Therefore, it is necessary to consider changing material parameters due to the temperature change. © 2019 The Author(s)

Reconstructing Deconstruction: High-Velocity Cloud Distance Through Disruption Morphology

We present Arecibo L-band Feed Array 21-cm observations of a sub-complex of HVCs at the tip of the Anti-Center Complex. These observations show morphological details that point to interaction with the ambient halo medium and differential drag within the cloud sub-complex. We develop a new technique for measuring cloud distances, which relies upon these observed morphological and kinematic characteristics, and show that it is consistent with H-alpha distances. These results are consistent with distances to HVCs and halo densities derived from models in which HVCs are formed from cooling halo gas.Comment: 8 pages, 2 figures, 1 tabe, Accepted to Ap

Publisher. Disambiguierung und Historisierung. Projektbericht

Bruns A, Lenke C, Rimmert C. Publisher. Disambiguierung und Historisierung. Projektbericht.; 2019

Molecular and mass spectral identification of the broadly conserved decapod crustacean neuropeptide pQIRYHQCYFNPISCF: The first PISCF-allatostatin (Manduca sexta- or C-type allatostatin) from a non-insect

The PISCF-allatostatins (Manduca sexta- or C-type allatostatins) are a family of pentadecapeptides characterized by a pyroglutamine blocked N-terminus, an unamidated-PISCF C-terminus, and a disulfide bridge between two internal Cys residues. Several isoforms of PISCF-AST are known, all from holometabolous insects. Using a combination of transcriptomics and mass spectrometry, we have identified the first PISCF-type peptides from a non-insect species. In silico analysis of crustacean ESTs identified several Litopenaeus vannamei (infraorder Penaeidea) transcripts encoding putative PISCF-AST precursors. Translation of these ESTs, with subsequent prediction of their putative post-translational processing, revealed the existence of as many as three PISCF-type peptides, including pQIRYHQCYFNPISCF (disulfide bridging between Cys7 and Cys14). Although none of the predicted isoforms was detected by mass spectrometry in L. vannamei, MALDI-FTMS mass profiling identified an m/z signal corresponding to pQIRYHQCYFNPISCF (disulfide bridge present) in neural tissue from 28 other decapods, which included members of six infraorders (Stenopodidea, Astacidea, Thalassinidea, Achelata, Anomura and Brachyura). Further characterization of the peptide using SORI-CID and chemical derivatization/enzymatic digestion supported the theorized structure. In both the crab Cancer borealis and the lobster Homarus americanus, MALDI-based tissue surveys suggest that pQIRYHQCYFNPISCF is broadly distributed in the nervous system; it was also detected in the posterior midgut caecum. Collectively, our data show that members of the PISCF-AST family are not restricted to the holometabolous insects, but instead may be broadly conserved within the Pancrustacea. Moreover, our data suggest that one highly conserved PISCF-type peptide, pQIRYHQCYFN-PISCF, is present in decapod crustaceans, functioning as a brain-gut paracrine/hormone. © 2009 Elsevier Inc. All rights reserved

A New Robotic Spray Technology for Generative Manufacturing of Complex Concrete Structures Without Formwork

The robot-assisted manufacturing is introduced for many years in automated production areas, while the production of buildings still follows the traditional manual process. Using new possibilities of digital planning the construction industry demonstrated potential for the implementation of freeform architectures, which are only possible using expensive and only once usable formwork structures. This paper focuses on sprayed concrete technology for automated production processes to build up freeform concrete components. A study case of the production of a concrete wall by an industrial robot, equipped with a concrete spraying tool is presented in order to investigate the possibilities and tolerancing issues of this technique