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Shape-changing particles for locally resolved particle geometry in DEM simulations

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Particuology 2024年第6期89卷 185-190页

作者： Enric Illana Klidi Qyteti maik.scharnowski Maximilian Brömmer Siegmar Wirtz Viktor Scherer Institute of Energy Plant Technology Ruhr-University BochumBochumGermany

Taking into account the complex shape of particles in discrete element method (DEM) simulations of large-scale granular systems is computationally demanding due to the time-consuming contact detection algorithms for polyhedral particles. In this short communication, a novel approach that locally resolves the particle shapes where needed and uses a simplified representation elsewhere, to accelerate simulations without compromising accuracy, is presented. For this purpose, a method employing a smooth transition of the particle shape representation from analytical spheres to shape-resolving polyhedra is introduced in DEM. The feasibility and correct implementation of this approach are demonstrated through simulations of hopper discharge involving spherical and dodecahedral particles from a flat bottom silo or shaft kiln. The model capabilities, in terms of accuracy as well as reduction in computational effort, are quantified for a moving bed with continuous outflow.

关键词： Polyhedron Size change Shape change Locally resolved DEM

Optimizing magneto-ionic performance in structure/composition-engineered ternary nitrides

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Journal of Materiomics 2024年第4期10卷 870-879页

作者： Zheng Ma P.Monalisha Zhengwei Tan Eva Pellicer Maciej O.Liedke maik Butterling Ahmed G.Attallah Eric Hirschmann Andreas Wagner Fatima Ibrahim Mairbek Chshiev Enric Menndez Jordi Sort Departament de Física Universitat Autònoma de BarcelonaCerdanyola del Vallès08193Spain Institute of Radiation Physics Helmholtz-Zentrum Dresden–RossendorfDresden01328Germany University of Grenoble Alpes CEACNRSSPINTECGrenoble38000France Institut Universitaire de France Paris75231France InstitucióCatalana de Recerca i Estudis Avançats(ICREA) Pg.Lluís Companys 23Barcelona08010Spain

Magneto-ionics,an emerging approach to manipulate magnetism that relies on voltage-driven ion motion,holds the promise to boost energy efficiency in information technologies such as spintronic devices or future non-von Neumann computing *** this purpose,stability,reversibility,endurance,and ion motion rates need to be synergistically *** various ions,nitrogen has demonstrated superior magneto-ionic performance compared to classical species such as oxygen or ***,we show that ternary Co1−xFexN compound exhibits an unprecedented nitrogen magneto-ionic *** substitution of Co by Fe in binary CoN is shown to be favorable in terms of generated magnetization,cyclability and ion motion ***,the Co_(0.3)5Fe_(0.6)5N films exhibit an induced saturation magnetization of 1,500 emu/cm^(3),a magneto-ionic rate of 35.5 emu/(cm^(3)·s)and endurance exceeding 103 *** values significantly surpass those of other existing nitride and oxide *** improvement can be attributed to the larger saturation magnetization of Co_(0.35)Fe_(0.65) compared to individual Co and Fe,the nature and size of structural defects in as-grown films of different composition,and the dissimilar formation energies of Fe and Co with N in the various developed crystallographic structures.

关键词： Voltage control of magnetism Magneto-ionics Electrolyte gating Ternary nitrides Ion transport

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橡胶串联混炼技术提效节能分析

中国橡胶 2024年第S1期40卷 16-21页

作者：车沛懿(编译) Lukas Hermeling maik Rinker 青岛海福乐机械设备有限公司 HF mixing集团公司

近年来,不断上涨的电力和能源成本,已经成为工业企业日益沉重的负担,其原因包括公共卫生事件、局部区域冲突,以及气候保护、节能降耗等。因此,企业必须不断优化和调整自身的生产工艺流程,同时还需引进技术以提升产品质量和经济效益。轮... 详细信息

近年来,不断上涨的电力和能源成本,已经成为工业企业日益沉重的负担,其原因包括公共卫生事件、局部区域冲突,以及气候保护、节能降耗等。因此,企业必须不断优化和调整自身的生产工艺流程,同时还需引进技术以提升产品质量和经济效益。轮胎生产商和橡胶制品企业越来越多地从能源角度审视和优化生产流程。串联混炼技术是提高能源效率的一种可行方式。

关键词：混炼技术公共卫生事件引进技术能源效率提效节能能源成本节能降耗生产工艺流程

Traumatic Neglected Antero-Medial Knee Dislocation: Case Report

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Open Journal of Orthopedics 2024年第9期14卷 421-426页

作者： Souleymane Ouédraogo Massadiami Soulama Abdourahmane Ouangré Ousmane Ouermi Sékou Sidibé maik Telyann Tchitembo Malick Diallo Patrick Wendpouiré Hamed Dakouré Orthopedics and Traumatology Department University Hospital Sour Sanou Bobo-Dioulasso Burkina Faso Superior Institute of Medical Sciences University Nazi Boni Bobo-Dioulasso Burkina Faso Surgery Department Regional University Hospital Ouahigouya Burkina Faso Faculty of Medicine University Ledea Bernard Oudraogo Ouahigouya Burkina Faso

Introduction: Neglected knee dislocation is an unusual injury, only a few cases have been reported in the literature. The circumstances of onset are generally an unnoticed knee dislocation in a polytrauma context or a delay in consultation after the initial trauma. Presentation of case: We report the case of a 48-year-old female patient who sustained a knee injury during a domestic accident. Initial treatment was traditional and was followed for 3 years. She then consulted hospital, where a neglected knee dislocation was identified and treated with femorotibial arthrodesis. Discussion and conclusion: The treatment options of neglected knee dislocation include open reduction and fixation, arthrodesis and total knee arthroplasty. That the choice depends on the old unreduced of dislocation.

关键词： Neglected Knee Dislocation Tibiofemoral Arthrodesis Total Knee Arthroplasty

Auxin-Oxylipin Crosstalk:Relationship of Antagonists

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Journal of Integrative Plant Biology 2011年第6期53卷 429-445页

作者： maik Hoffmann Mathias Hentrich Stephan Pollmann Centro de Biotecnología y Genómica de Plantas(U.P.M.-I.N.I.A.) Parque Científico y Tecnológico de la U.P.M. Campus de Montegancedo Ruhr-Universitt Bochum Lehrstuhl fr PflanzenphysiologieUniversittsstrasse

Phytohormones regulate a wide array of developmental processes throughout the life cycle of plants. Herein, the various plant hormones may interact additively, synergistically, or antagonistically. By their cooperation they create a delicate regulatory network whose net output largely depends on the action of specific phytohormone combinations rather than on the independent activities of separate hormones. While most classical studies of plant hormonal control have focused mainly on the action of single hormones or on the synergistic interaction of hormones in regulating various developmental processes, recent work is beginning to shed light on the crosstalk of nominally antagonistic plant hormones, such as gibberellins and auxins with oxylipins or abscisic acid. In this review, we summarize our current understanding of how two of the first sight antagonistic plant hormones, i.e. auxins and oxylipins, interact in controlling plant responses and development.

关键词： Auxin biosynthesis crosstalk hormone jasmonic acid.

Spent coffee ground as source for hydrocarbon fuels

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Journal of Energy Chemistry 2016年第1期25卷 146-152页

作者： Peter Döhlert maik Weidauer Stephan Enthalera Technische Universitat Berlin Department of ChemistryCluster of Excellence"Unifying Concepts in Catalysis"Straβe des 17.Juni 135/C2D-10623 BerlinGermany Universitat Hamburg Department of ChemistryMartin-Luther-King-Platz 6D-20146 HamburgGermany

The conversion of triglycerides（coffee oil） obtained from spent coffee ground to produce hydrocarbon fuel（diesel） was studied. In more detail, a catalytic hydrodeoxygenation of the coffee oil was performed applying polymethylhydrosiloxane（PMHS） as cheap reductant under mild reaction conditions. However, along with the hydrocarbons significant amounts of PMHS-waste are generated, since only～1.7% of the PMHS is required for the reduction process. Based on that, in a subsequent depolymerization step the PMHS-waste was converted to methyltrifluorosilane and difluoromethylsilane, which can be applied as building blocks for the production of new silicones, with boron trifluoride diethyl etherate（BF3OEt2） as depolymerization reagent.

关键词： Catalysis Triglyceride Hydrocarbons Hydrodeoxygenation Depolymerization

Secured ECG Signal Transmission Using Optimized EGC with Chaotic Neural Network in WBSN

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Computer Systems Science & Engineering 2023年第2期44卷 1109-1123页

作者： Ishani Mishra Sanjay Jain Vivek maik Department of ECE New Horizon College of EngineeringBengaluru560103India CMR Institute of Technology Bengaluru560037India SRM University Chennai603203India

In wireless body sensor network(WBSN),the set of electrocardiogram(ECG)data which is collected from sensor nodes and transmitted to the server remotely supports the experts to monitor the health of a *** transmit-ting these collected data some adversaries may capture and misuse it due to the compromise of ***,the major aim of this work is to enhance secure trans-mission of ECG signal in *** attain this goal,we present Pity Beetle Swarm Optimization Algorithm(PBOA)based Elliptic Galois Cryptography(EGC)with Chaotic Neural *** optimize the key generation process in Elliptic Curve Cryptography(ECC)over Galoisﬁeld or EGC,private key is chosen optimally using PBOA *** the encryption process is enhanced by presenting chaotic neural network which is used to generate chaotic sequences or cipher *** of this work show that the proposed cryptogra-phy algorithm attains better encryption time,decryption time,throughput and SNR than the conventional cryptography algorithms.

关键词： Wireless body sensor network ECG pity beetle swarm optimization algorithm elliptic galois cryptography and chaotic neural network

Secure and Optimal LOADng Routing for IoT with Composite RoutingMetric

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Computers, Materials & Continua 2023年第1期74卷 655-669页

作者： Divya Sharma Sanjay Jain Vivek maik Department of Electronics and Communication New Horizon College of EngineeringBengaluru560103India CMR Institute of Technology Bengaluru560037India Department of Electronics and Communication SRM Institute of Science and TechnologyKattankulathurChennai603203India

Security is the one of the major challenges for routing the data between the source and destination in an Internet of Things(IoT)*** overcome this challenge,a secure Lightweight On-demand Ad hoc Distancevector—Next Generation(LOADng)Routing Protocol is proposed in this *** the LOADng protocol is the second version of Ad Hoc On-Demand Distance Vector(AODV)protocol,it retains most of the basic functionality and characteristics of *** the route discovery process,the cyclic shift transposition algorithm(CSTA)is used to encrypt the control packets of the LOADng protocol to improve its *** approach only derives transposition and substitution without product cipher with respect to input *** this,for choosing the best probable path between the source and destination,routing metrics such as link quality Indicator(LQI),hop count(HC)and queue length(QL)are included in the control *** data is then securely sent using CSTA using the optimal secure path *** Results depict that the proposed secure and optimal LOADng(SO-LOADng)using CSTA encryption obtains better throughput,delivery ratio encryption time and decryption time than the existing state-ofart approaches.

关键词： IoT LOADng CSTA link quality indicator queue length

Targeting metabolic rewiring might decrease spread of tumor cells: Mitochondrial tRNA modifications promote cancer metastasis

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Signal Transduction and Targeted Therapy 2022年第11期7卷 3987-3988页

作者： maik Luu Alexander Visekruna Lehrstuhl für Zelluläre Immuntherapie Medizinische Klinik und Poliklinik IIUniversitätsklinikum WürzburgWürzburgGermany Institute for Medical Microbiology and Hygiene Philipps-UniversityMarburgGermany

In a recent study published in Nature,Delaunay and colleagues demonstrate that tRNA modifications in mitochondria have the potential to affect the synthesis of mitochondrial proteins involved in oxidative phosphorylation(OXPHOS),which drives the invasive spread of cancer *** inhibition of one particular RNA-modifying enzyme was sufficient to prevent the cancer cell invasion and dissemination.

关键词： invasion metastasis cancer