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A novel method of quantifying the coating progress in a three-dimensional prismatic spouted bed

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Particuology 2019年第1期17卷 137-145页

作者： swantje.pie.scha Finn Ole Poppinga Stefan Heinrich Michael Müller Michael Schonherr Frank Kleine Jager Hamburg University of Technology Institute of Solids Process Engineering and Particle TechnologyDenickestraβe 1521073 HamburgGermany BASF SE RCP/TT67056 LudwigshafenGermany

An optical method of experimentally quantifying the coating progress in a laboratory prismatic spouted bed is presented. Microcrystalline cellulose particles with size dp = 0.57 mm are used as core material. Waterborne coating suspensions with methylene blue as a dye are used and sprayed via a two-fluid nozzle in bottom-spray configuration. A high-speed camera with a color filter is positioned in front of the observation window of the three-dimensional plant and records the flow pattern in the process chamber with a certain frequency. With increasing surface coverage, the particles become bluer and darker. The change in brightness is detected by digital image analysis. In the implemented algorithm, the spherical particles are detected, cut from the background and normalized regarding their lighting and area. The detection of coated pixels on the single particles allows the calculation of the coating fraction and coating uniformity after a Kalman filter has been applied to reduce noise. It is shown that the method can be used to determine the time needed to reach the maximum blue value indicating a complete coating of the particle bed. Besides the minimum coating duration, information on the spraying performance (e.g., the time point of a possibly occurring blockage of the nozzle) can be obtained from the data. Two exemplary experiments are presented, showing a connection of the slope of the coating fraction and the uniformity of the coating of the particles in the apparatus that results in the recommendation of a slow liquid injection for obtaining consistent coating layers as desired in many applications.

关键词： Spouted bed Particle coating Granulation Digital image analysis

Neutralization of the SARS-CoV-2 Delta variant after heterologous and homologous BNT162b2 or ChAdOx1 nCoV-19 vaccination

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Cellular & Molecular Immunology 2021年第10期18卷 2455-2456页

作者： swantje I.Hammerschmidt Berislav Bosnjak Günter Bernhardt Michaela Friedrichsen Inga Ravens Alexandra Dopfer-Jablonka Markus Hoffmann Stefan Pöhlmann Georg M.N.Behrens Reinhold Förster Institute of Immunology Hannover Medical SchoolHannoverGermany Department for Rheumatology and Immunology Hannover Medical SchoolHannoverGermany Infection Biology Unit German Primate Center-Leibniz Institute for Primate ResearchGöttingenGermany Faculty of Biology and Psychology Georg-August-University GöttingenGöttingenGermany German Center for Infection Research(DZIF) Partner Site Hannover-BraunschweigHannoverGermany German Center for Lung Research(DZL) HannoverGermany Cluster of Excellence RESIST(EXC 2155) Hannover Medical SchoolHannoverGermany

Since the beginning of the COVID-19 pandemic,divergent variants of concern(VoCs)of SARS-CoV-2 have evolved and become the most prevalent SARS-CoV-2 variants in distinct locations at different ***,the Delta variant(B.1.617.2)dominates infection events in large parts of the *** campaigns,however,still use SARS-CoV-2 vaccines based on the spike(S)protein of the original Wuhan virus.

关键词： Delta homologous campaign

Potentials and limitations of a system theory of macro-ergonomics

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Potentials and limitations of a system theory of macro-ergon...

第十七届国际工效学大会暨中国人类工效学会成立20周年庆...

作者： Matthias Goebel swantje Zschernack Department of Human Kinetics and Ergonomics Rhodes University

Macro-ergonomic interventions have shown many benefits in industrial ***,macro-ergonomics is still very much an expert task,joining ergonomics knowledge with the application experience in the practical *** a result,a broad expertise is needed for the application of macro-ergonomics and the prognosis of outcome comes along with some uncertainty due to the complexity of the *** general nature of work environments as a complex system creates the ambivalence that on the one side a predetermination is needed to provide objective planning options,but,on the other side,complexity in itself deals with fuzziness and *** that this conflict can’t be resolved,but the practical challenge to converge the two poles still applies,ergonomics must aim for separating both:providing a maximum consistent deterministic model and,at the same time,clearly identifying the aspects of complexity that are excluded from a deterministic consideration due to their *** proposed paper demonstrates the generation of a comprehensive work system model that incorporates many existing macro-ergonomic concepts from different disciplinary backgrounds into a comprehensive model,and that integrates work system modelling with operational and with work system *** allows joint consideration of design options with different regulatory levels on the operational,strategic and system design *** is reflected in this approach by limitations of the formal expression in terms of qualitative and quantitative ***,this approach allows provision of a framework for practical application-handling complex feedback systems-and respecting the inherent predictability limitations of such ***,again,helps to optimise the introduction of ergonomic principles to a maximum possible degree and clearly accept the limitations for anticipation and interference in real world systems.

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圣基尔根别墅

景观设计 2009年第6期 I0012-I0017页

作者： Rainer Schmidt Landschafts Architekten Raffaella Sirtoli（图） swantje Nowak（图）王琳（翻译）

在霍夫冈（Wolfgangsee）湖畔的葛尔芹村（***）有一处与新老社区相连的景观带在这里绵延伸展开来——平坦的草坪与峻峭的山峰形成了鲜明的对比．同时也为游人欣赏湖光景色提供了去处。

关键词：别墅景观带景色社区