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Boosting the superconducting spin valve effect in a metallic superconductor/ferromagnet heterostructure

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Nano Research 2016年第4期9卷 1005-1011页

作者： Pavel V. Leksin Andrey A. Kamashev joachim Schumann Vladislav E. Kataev Jurgen Thomas Bernd Buchner Ilgiz A. Garifullin Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden) DoO 1171 Dresden Germany Zavoisky Physical-Technical Institute Russian Academy of Sciences 420029 Kazan Russia Dresden University of Technology D-01062 Dresden Germany

Superconducting spin valves based on the superconductor/ferromagnet （S/F） proximity effect are considered to be a key element in the emerging field of superconducting spintronics. Here, we demonstrate the crucial role of the morphology of the superconducting layer in the operation of a multilayer S/F1/F2 spin valve. We study two types of superconducting spin valve heterostructures, with rough and with smooth superconducting layers, using transmission electron microscopy in combination with transport and magnetic characterization. We find that the quality of the S/F interface is not critical for the S/F proximity effect, as regards the suppression of the critical temperature of the S layer. However, it appears to be of paramount importance in the performance of the S/F1/F2 spin valve. As the morphology of the S layer changes from the form of overlapping islands to a smooth case, the magnitude of the conventional superconducting spin valve effect significantly increases. We attribute this dramatic effect to a homogenization of the Green function of the superconducting condensate over the S/F interface in the S/F1/F2 valve with a smooth surface of the S laver.

关键词： spintronics superconductivi ferromagnetism proximity effect

Mass-Oscillators as Information Memories of Action

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Journal of High Energy Physics, Gravitation and Cosmology 2023年第1期9卷 33-50页

作者： Hans joachim Dudek Hennef Germany

In the theory of physical information, the physical phenomena of electromagnetism, quantum mechanics and gravity can be described by means of the action as information enclosed in four dimensional structures with oscillator properties, under the conditions of the Hamilton principle. The present report shows that it is also possible to simulate the behaviour of the mass under these conditions. As a result, among other things, the statements are obtained that the mass is stored virtual action;the rest frame of elementary objects and the inertia of matter are caused by the action stored in the mass oscillators.

关键词： Physical Information Mass Oscillators Action Higgs Mechanism

Variation-aware fault modeling

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Science China(Information Sciences) 2011年第9期54卷 1813-1826页

作者： HOPSCH Fabian BECKER Bernd HELLEBRAND Sybille POLIAN Ilia STRAUBE Bernd VERMEIREN Wolfgang WUNDERLICH Hans-joachim Fraunhofer IIS/EAS University of Freiburg University of Paderborn University of Passau University of Stuttgart

To achieve a high product quality for nano-scale systems,both realistic defect mechanisms and process variations must be taken into *** existing approaches for variation-aware digital testing either restrict themselves to special classes of defects or assume given probability distributions to model variabilities,the proposed approach combines defect-oriented testing with statistical library *** uses Monte Carlo simulations at electrical level to extract delay distributions of cells in the presence of defects and for the defect-free *** allows distinguishing the effects of process variations on the cell delay from defect-induced cell delays under process *** provide a suitable interface for test algorithms at higher levels of abstraction,the distributions are represented as histograms and stored in a histogram data base (HDB).Thus,the computationally expensive defect analysis needs to be performed only once as a preprocessing step for library characterization,and statistical test algorithms do not require any low level information beyond the *** generation of the HDB is demonstrated for primitive cells in 45 nm technology.

关键词： process variations test methods statistical test histogram data base

Determination of surface color of‘all yellow’mango cultivars using computer vision

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International Journal of Agricultural and Biological Engineering 2016年第1期9卷 42-50页

作者： Marcus Nagle Kiatkamjon Intani Giuseppe Romano Busarakorn Mahayothee Vicha Sardsud joachim Müller Institute of Agricultural Engineering Tropics and Subtropics GroupUniversität HohenheimGarbenstrasse 9Stuttgart70599Germany Department of Food Technology Faculty of Engineering and Industrial TechnologySilpakorn UniversityNakhon Pathom73000Thailand School of Agro-Industry Mae Fah Luang UniversityChiang Rai57100 Thailand

Image processing techniques are increasingly applied in sorting applications of agricultural *** work has assessed the use of image processing for inspecting surface color of two Thai mango cultivars.A computer vision system(CVS)was developed and experiments were conducted to monitor peel color change during the ripening *** of RGB to CIE-LAB values was done via image processing and prediction models were developed to estimate color parameters from CVS *** evaluations showed insufficient prediction for L values(R2=0.42-0.58),but better results for A and B values(R2=0.90-0.95 and 0.80-0.82,respectively).Compared to the calculated color values hue angle and chroma,a yellowness index computed from intermediate XYZ values was found to be much more adept at accurately predicting peel color from CVS *** were strong for both cultivars(R2=0.93 for‘Nam Dokmai’and R2=0.95 for‘Maha Chanok’).Results from classification analysis indicated satisfactory results for classifying fruits according to ripeness based on *** rates of true positives in the categories unripe,ripe and overripe ranged 72%-92%for‘Nam Dokmai’and 98%-100%for‘Maha Chanok’.Therefore,it was shown that the CVS was capable of producing accurate color values for the two mango cultivars *** findings of this study can be incorporated for development of a robust system for quality prediction and establishment of a CVS for automatic grading and sorting of mangos.

关键词： mango peel color computer vision image processing fruit quality Thailand

专访ART+COM联合创始人 joachim Sauter：首先是意义，其次才是技术

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包装与设计 2019年第6期 38-57页

作者：无 joachim Sauter 《包装&设计》 ART+COM Studios

joachim Sauter教授:ART+COM Studios联合创始人、设计总监。自1991年以来一直担任柏林艺术大学数字媒体设计教授,并于2001年起担任加州大学洛杉矶分校媒体设计与艺术教授。他的作品在全球多家博物馆展出,并在媒体设计与艺术领域屡获殊... 详细信息

joachim Sauter教授:ART+COM Studios联合创始人、设计总监。自1991年以来一直担任柏林艺术大学数字媒体设计教授,并于2001年起担任加州大学洛杉矶分校媒体设计与艺术教授。他的作品在全球多家博物馆展出,并在媒体设计与艺术领域屡获殊荣,包括BAFTA互动奖、戛纳国际创意节金奖、D&AD黑铅笔奖和Clio全场大奖等。

关键词：数字媒体设计柏林艺术大学设计总监 ART COM 戛纳国际创意节创始人媒体

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Modeling of the 3D spatio-temporal thermal profile of joule-class Yb3+-based laser amplifiers

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High Power Laser Science and Engineering 2019年第3期7卷 53-59页

作者： Issa Tamer Sebastian Keppler Jorg Komer Marco Hornung Marco Hellwing Frank Schorcht joachim Hein Malte C.Kaluza Helmholtz-Institute Jena Frobelstieg 307743 JenaGermany Friedrich-Schiller-University Jena Max-Wien Platz 107743 JenaGermany

Thermal profile modification of an active material in a laser amplifier via optical pumping results in a change in the material’s refractive index,and causes thermal expansion and stress,eventually leading to spatial phase aberrations,or even permanent material *** this purpose,knowledge of the 3D spatio-temporal thermal profile,which can currently only be retrieved via numerical simulations,is critical for joule-class laser amplifiers to reveal potentially dangerous thermal features within the pumped active *** this investigation,a detailed,spatio-temporal numerical simulation was constructed and tested for accuracy against surface thermal measurements of various endpumped Yb^3+-doped laser-active *** measurements and simulations show an excellent agreement and the model was successfully applied to a joule-class Yb3+-based amplifier currently operating in the POLARIS laser system at the Friedrich-Schiller-University and Helmholtz-Institute Jena in Germany.

关键词： diode-pumped solid-state lasers high intensity lasers laser amplifiers spatio-temporal thermal profile modeling ytterbium

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Influence of colour changes and moisture content during banana drying on laser backscattering

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International Journal of Agricultural and Biological Engineering 2010年第2期3卷 46-51页

作者： Giuseppe Romano Dimitrios Argyropoulos Klaus Gottschalk Emanuele Cerruto joachim Müller Institute of Agricultural Engineering University of HohenheimStuttgartGermany Leibniz-Institute of Agricultural Engineering Potsdam-Bornim ATBGermany Department of Agricultural Engineering University of Agricultural SciencesCataniaItaly

Pre-drying treatments are frequently employed to preserve fruit *** objective of this research was to monitor colour changes of banana during drying by laser backscattering and to determine the influence of the fruit discolouration on the light distribution into banana ***,to examine the influence of drying on the laser backscatter,the relationship between moisture content and relative laser area of banana slices was analyzed with different degrees of colour *** experiments were conducted at drying air temperature of 63℃with various pre-treatments like chilling,soaking in ascorbic/citric acid and dipping in distilled *** untreated sample was used as a control.A laser diode emitting at 670 nm with 3 mW power was used as light *** backscattering relative laser area was used as an indicator for the light absorption into the *** high result achieved on coefficient of determination R^(2)(>0.93)confirmed linear relationship between relative laser area and moisture *** with ascorbic acid gave the best prediction of the moisture content with the standard error of 5.7 and 8.8 for the estimated intercept and *** results showed a significant difference of lightness(L*values)during drying according to the different *** a result,colour degradation did not have a significant influence on the absorption of light at 670 nm wavelength.

关键词： musa x paradisiaca colour change banana drying pre-treatment relative laser area backscattering

SIMULATION OF PARTICLE COATING IN THE SUPERCRITICAL FLUIDIZED BED

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China Particuology 2005年第1期3卷 113-124页

作者： Carsten Vogt Ernst-Ulrich Hartge joachim Werther Gerd Brunner Technical University Hamburg-Harburg D21071 Hamburg Germany

Fluidized bed technology using supercritical carbon dioxide both as a fluidizing gas and as a solvent for the coating material makes possible the production of thin, uniform and solvent-free coatings. But operation at low fluidizing velocities, which is favorable to facilitate gas cleaning under the high pressure conditions, may lead to uneven distribution of the coating in the fluidized bed and to unstable operation due to agglomeration. Therefore a model has been developed which describes local fluid dynamics within the high pressure fluidized bed. Based on this model, the coating process is described and the distribution of the coating inside the fluidized bed is calculated. Furthermore a submodel for the calculation of local concentrations of liquid paraffin has been set up, which may be used as a basis for the prediction of agglomeration and thus stability of operation.

关键词： particle coating fluidized bed supercritical fluid fluid mechanics

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Quantification in LC and GC a practical guide to good chromatographic data edited by Hans-joachim Kuss and Stavros Kromidas.

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