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Nano Research 2021年第5期14卷 1450-1456页

作者： Petra S.Pálvölgyi Daniel Sebők Imre Szenti eva Bozo Henri ervasti Olli Pitkänen Jari Hannu Heli Jantunen marko e.leinonen Sami Myllymäki Akos Kukovecz Krisztian Kordas Microelectronics Research Unit Faculty of Information and Electrical EngineeringUniversity of OuluP.O.Box 4500FI-90570OuluFinland Interdisciplinary excellence Centre Department of Applied and Environmental ChemistryUniversity of SzegedRerrich Béla tér 1H-6720SzegedHungary Centre for Wireless Communications University of OuluP.O.Box 4500FI-90570OuluFinland

In the next generation wireless communication systems operating at near terahertz frequencies, dielectric substrates with the lowest possible permittivity and loss factor are becoming essential. In this work, highly porous (98.9% ± 0.1%) and lightweight silica foams (0.025 ± 0.005 g/cm3), that have extremely low relative permittivity (εr = 1.018 ± 0.003 at 300 GHz) and corresponding loss factor (tan δe synthetized by a template-assisted sol-gel method. After dip-coating the slabs of foams with a thin film of cellulose nanofibers, sufficiently smooth surfaces are obtained, on which it is convenient to deposit electrically conductive planar thin films of metals important for applications in electronics and telecommunication devices. Here, micropatterns of Ag thin films are sputtered on the substrates through a shadow mask to demonstrate double split-ring resonator metamaterial structures as radio frequency filters operating in the sub-THz band.

关键词： low-permittivity materials low-loss dielectrics templated sol-gel synthesis silica foams 6G telecommunication

Water consumption and biodiversity:Responses to global emergency events

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Science Bulletin 2024年第16期69卷 2632-2646页

作者： Dandan Zhao Junguo Liu Laixiang Sun Klaus Hubacek Stephan Pfister Kuishuang Feng Heran Zheng Xu Peng Daoping Wang Hong Yang Lei Shen Fei Lun Xu Zhao Bin Chen marko Keskinen Shaohui Zhang Jialiang Cai Olli Varis Water&Development Research Group Department of Built EnvironmentAalto UniversityEspoo 15200Finland School of Water Conservancy North China University of Water Resources and Electric PowerZhengzhou 450046China School of environmental Science and engineering Southern University of Science and TechnologyShenzhen 518055China Department of Geographical Sciences University of MarylandCollege Park 20742USA School of Finance and Management SOASUniversity of LondonLondon WC1H0XGUK Integrated Research on energy Environment and SocietyEnergy and Sustainability Research Institute GroningenUniversity of GroningenGroningen 9747AGthe Netherlands eTH Zurich Institute of Environmental EngineeringZurich 8093Switzerland The Bartlett School of Sustainable Construction University College LondonLondon WC1E6BTUK School of Business Jiangnan UniversityWuxi 214122China Department of Computer Science and Technology University of CambridgeCambridge CB21TNUK w2e environmental Consulting GmbH Duebendorf 8600Switzerland Key Laboratory for Resource Use and environmental Remediation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Land Science and Technology China Agricultural UniversityBeijing 100083China Institute of Blue and Green Development Shandong UniversityWeihai 264209China Fudan Tyndall Center Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China School of economics and Management Beihang UniversityBeijing 100191China International Institute for Applied Systems Analysis Laxenburg A-2361Austria

Given that it was a once-in-a-century emergency event,the confinement measures related to the coronavirus disease 2019(COVID-19)pandemic caused diverse disruptions and changes in life and work *** changes significantly affected water consumption both during and after the pandemic,with direct and indirect consequences on ***,there has been a lack of holistic evaluation of these ***,we propose a novel framework to study the impacts of this unique global emergency event by embedding an environmentally extended supply-constrained global multi-regional input-output model(MRIO)into the drivers-pressure-state-impact-response(DPSIR)*** framework allowed us to develop scenarios related to COVID-19 confinement measures to quantify country-sector-specific changes in freshwater consumption and the associated changes in biodiversity for the period of *** results suggest progressively diminishing impacts due to the implementation of COVID-19 vaccines and the socio-economic system’s self-adjustment to the new *** 2020,the confinement measures were estimated to decrease global water consumption by about 5.7% on average across all scenarios when compared with the baseline level with no confinement ***,such a decrease is estimated to lead to a reduction of around 5% in the related pressure on *** the interdependencies and interactions across global supply chains,even those countries and sectors that were not directly affected by the COVID-19 shocks experienced significant impacts:Our results indicate that the supply chain propagations contributed to 79% of the total estimated decrease in water consumption and 84%of the reduction in biodiversity loss on *** study demonstrates that the MRIO-enhanced DSPIR framework can help quantify resource pressures and the resultant environmental impacts across supply chains when facing a global emergency ***,we recommend the development o

关键词： Global emergency events Water-biodiversity causal effect COVID-19 Biodiversity MRIO-enhanced DPSIR framework Supply-chain network High-resolution water consumption dataset Supply-constrained multi-regional input-output(mixed MRIO)model

Surface modifications of biometallic commercially pure Ti and Ti–13Nb–13Zr alloy by picosecond Nd:YAG laser

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International Journal of Minerals,Metallurgy and Materials 2021年第2期28卷 285-295页

作者： Slađana Laketić marko Rakin MilošMomčilović Jovan Ciganović Đorđe Veljović Ivana Cvijović-Alagić Vinča Institute of Nuclear Sciences University of BelgradeP.O.Box 52211001 BelgradeSerbia Faculty of Technology and Metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia

The effects of picosecond Nd:YAG laser irradiation on chemical and morphological surface characteristics of the commercially pure titanium and Ti–13Nb–13Zr alloy in air and argon atmospheres were studied under different laser output energy *** the interaction of laser irradiation with the investigated materials,a part of the energy was absorbed on the target surface,influencing surface *** beam interaction with the target surface resulted in various morphological alterations,resulting in crater formation and the presence of microcracks and hydrodynamic ***,different chemical changes were induced on the target materials’surfaces,resulting in the titanium oxide formation in the irradiation-affected area and consequently increasing the irradiation energy *** the high energy absorption at the site of interaction,the dimensions of the surface damaged area ***,surface roughness *** appearance of surface oxides also led to the increased material hardness in the surface-modified *** chemical and morphological changes were pronounced after laser irradiation of the Ti–13Nb–13Zr alloy surface.

关键词： commercially pure titanium Ti-13Nb-13Zr alloy surface modification Nd:YAG laser laser-induced damage hard oxidized surface

An overview of the role of neutrophils in innate immunity,inflammation and host-biomaterial integration

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Regenerative Biomaterials 2017年第1期4卷 55-68页

作者： Gretchen S.Selders Allison e.Fetz marko Z.Radic Gary L.Bowlin Department of Biomedical engineering University of MemphisMemphisTNUSA Department of Microbiology Immunology and BiochemistryUniversity of Tennessee Health Science Center(UTHSC)MemphisTN 38163USA

Despite considerable recent progress in defining neutrophil functions and behaviors in tissue repair,much remains to be determined with regards to its overall role in the tissue integration of *** article provides an overview of the neutrophil’s numerous,important roles in both inflammation and resolution,and subsequently,their role in biomaterial *** function in three primary capacities:generation of oxidative bursts,release of granules and formation of neutrophil extracellular traps(NeTs);these combined functions enable neutrophil involvement in inflammation,macrophage recruitment,M2 macrophage differentiation,resolution of inflammation,angiogenesis,tumor formation and immune system *** exhibit great flexibility to adjust to the prevalent microenvironmental conditions in the tissue;thus,the biomaterial composition and fabrication will potentially influence neutrophil behavior following *** review serves to highlight the neutrophil’s plasticity,reiterating that neutrophils are not just simple suicidal killers,but the true maestros of resolution and regeneration.

关键词： neutrophil tissue engineering NeTosis tissue regeneration host response inflammation

Statistical functions used for spatial modelling due to assessment of landslide distribution and landscape-interaction factors in Iran

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Geoscience Frontiers 2020年第4期11卷 1257-1269页

作者： Hamid Reza Pourghasemi Narges Kariminejad Amiya Gayen marko Komac Department of Natural Resources and environmental engineering College of AgricultureShiraz UniversityShirazIran Gorgan University of Agricultural Sciences and Natural Resources Dept.of Watershed&Arid Zone ManagementGorganIran Department of Geography University of CalcuttaKolkataIndia Faculty of Civil and Geodetic engineering University of LjubljanaSlovenia

Landslides influence the capacity for safe and sustainable development of mountainous *** study explores the spatial distribution of and the interactions between landslides that are mapped using global positioning system(GPS) and extensive field surveys in Mazandaran Province,***-pattern assessment is undertaken using several univariate summary statistical functions,including pair correlation,spherical-contact distribution,nearest-neighbor analysis,and O-ring analysis,as well as bivariate summary statistics,and a markcorrelation *** maximum entropy method was applied to prioritize the factors controlling the incidence of landslides and the landslides susceptibility *** validation processes were considered for separated 30%data applying the ROC curves,fourfold plot,and Cohen’s kappa *** results show that pair correlation and O-ring analyses satisfactorily predicted landslides at scales from 1 to 150 *** smaller scales,from 150 to 400 m,landslides were randomly *** nearest-neighbor distribution function show that the highest distance to the nearest landslide occurred in the 355 *** spherical-contact distribution revealed that the patterns were random up to a spatial scale of 80 *** bivariate correlation functions revealed that landslides were positively linked to several linear features(including faults,roads,and rivers) at all spatial *** mark-correlation function showed that aggregated fields of landslides were positively correlated with measures of land use,lithology,drainage density,plan curvature,and aspect,when the numbers of landslides in the groups were greater than the overall average *** results of analysis of factor importance have showed that elevation(topography map scale:1:25,000),distance to roads,and distance to rivers are the most important factors in the occurrence of *** susceptibility model of landslides indicates an excellent accuracy,i.e.,the AUC value of lands

关键词： Landslide Spatial point pattern Summary statistic GIS Iran

On the Range of the Common Cycle Time in a Road Network

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Journal of Harbin Institute of Technology(New Series) 2015年第6期22卷 31-36页

作者： Ting Lu marko Wlki Peter Wagner Institute of Transportation Systems German Aerospace Center (DLR) Faculty of Maritime and Transportation Ningbo University

In a coordinated road network,the optimal common cycle time is determined by evaluating the performance of the network in the given range of cycles. Normally,this range is determined by users 'experience. And a large range of common cycle time,e. g. [30,200] is chosen,which requires long computation time. This study considers that the optimal common cycle time ranges between the minimal and maximal value of intersections' individual optimal cycle time. It is proved mathematically from the convexity condition,that the delay of the network and each individual intersection are convex functions of the cycle time according to Webster delay model. Finally,2 000 random cases for the network composed of two intersections and of eight intersections are created to underline the proposed conclusions. The results of all cases confirm the validity,and show up to 90% improvement in computation time to compare with experience range. The signal optimization tool,Synchro,is also used to validate the conclusion by 50 random cases. The results confirm reliability further.

关键词： common cycle traffic signal optimization convexity Webster model

existence of Weakly efficient Solutions in Vector Optimization

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Acta Mathematica Sinica,english Series 2008年第4期24卷 599-606页

作者： Lucelina BATISTA SANTOS marko ROJAS-MeDAR Gabriel RUIZ-GARZóN Departamento de Matemática Universidade Federal do Paraná.CP.019081CEP:81531990Curitiba-PRBrazil Universidad del Bío-Bío Facultad de Ciencias Departamento de Ciencias BásicasCampus Fernando MayCasilla 447ChillánChile Departamento de estadística e I.O. Universidad de CádizE.U.E.EmpresarialesPor-vera 5411403 Jerez de la FronteraSpain

In this paper, we present an existence result for weak efficient solution for the vector optimization problem. The result is stated for invex strongly compactly Lipschitz functions.

关键词： vector optimization weak efficiency generalized convexity Clarke generalized gradient

Tunable Super-Structured Fiber Bragg Gratings with Perfect Sequences Based on m-Sequence

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Journal of electronic Science and Technology 2017年第4期15卷 358-363页

作者： Joao S.Pereira Marco P.M.Ferreira marko Gasparovic Instituto de Telecomunicacoes Lisboa 1049-001 Portugal Institute Polytechnic of Leiria Leiria 2411-901 Portugal Centro de Investigaao em Informaica e Comunicacoes Institute Polytechnic of Leiria Leiria 2411-901Portugal

Recently, a tunable fiber Bragg grating(FBG) was developed by using stress-responsive colloidal crystals. In this paper, we have simulated the application of these nanoparticles into the super-structured fiber Bragg grating(SSFBG) written with perfect sequences derived from a short maximal-length sequence. A tunable SSFBG will be available to overcome the prohibitive temperature variation of the optical codecs. Nevertheless,we presented a method to implement coherent time spreading optical code-division multiple-access(OCDMA) where a unique code(or perfect sequence) can be reused and mixed with different wavelengths to obtain a tunable wavelength-division multiplexing(WDM)system. In order to maximize the binary throughput, we have selected a unique short maximal-length sequence composed of 7 chips that can be tuned with 7 different optical wavelengths. We found thousands of different tunable combinations that presented power contrast ratios(P/C) higher than 12 dB. When a WDM-OCDMA system used 2 different combinations simultaneously, the perfect binary detection with error correction codes was achieved successfully. The tunable SSFBG with colloidal crystals will be a simple and good alternative choice for fiber-to-the-home(FTTH) communications.

关键词： Optical code-division multiple-access(OCDMA) super-structured fiber Bragg grating(SSFBG) wavelength-division multiplexing OCDMA(WDM-OCDMA)

The influence of physiobiomechanical parameters,technical aspects of shooting,and psychophysiological factors on biathlon performance:A review

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Journal of Sport and Health Science 2018年第4期7卷 394-404页

作者： marko S.Laaksonen Thomas Finkenzeller Hans-Christer Holmberg Gerold Sattlecker Department of Health Sciences Swedish Winter Sports Research CentreMid Sweden UniversityOstersund 83125Sweden Department of Sport Science and Kinesiology Paris Lodron University of SalzburgSalzburg 5020Austria School of Sport Sciences UiT The Arctic University of NorwayTromso 9019Norway Corresponding author.e-mail address：marko.laaksonen@miun.se

The biathlon, an Olympic sporting discipline that combines cross-country skiing with rifle marksmanship, entails considerable physiological demands, as well as fine motor control while shooting after intense exercise and under mental pressure. Although much of our knowledge about cross-country skiing is probably also applicable to the biathlon, carrying the rifle and shooting under stress make this discipline somewhat unique. The present review summarizes and examines the scientific literature related to biathlon performance, with a focus on physiological and biomechanical factors and shooting technique, as well as psychophysiological aspects of shooting performance. We conclude with suggestions for future research designed to extend our knowledge about the biathlon, which is presently quite limited.2018 Published by elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//***/licenses/by-nc-nd/4.0/）.

关键词： Cortical activity Gaze behavior Postural balance Skiing Triggering

Raman lasing and soliton mode-locking in lithium niobate microresonators

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Light(Science & Applications) 2020年第1期9卷 1925-1931页

作者： Mengjie Yu Yoshitomo Okawachi Rebecca Cheng Cheng Wang Mian Zhang Alexander L.Gaeta marko Loncar Department John A.Paulson School of engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Department of Applied Physics and Applied Mathematics Columbia UniversityNew YorkNY 10027USA Department of electronic engineering&State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloonHong KongChina HyperLight Corporation 501 Massachusetts AvenueCambridgeMA 02139USA

The recent advancement in lithium-niobite-on-insulator(LNOI)technology is opening up new opportunities in optoelectronics,as devices with better performance,lower power consumption and a smaller footprint can be realised due to the high optical confinement in the *** LNOI platform offers both largeχ(2)andχ(3)nonlinearities along with the power of dispersion engineering,enabling brand new nonlinear photonic devices and applications for the next generation of integrated photonic ***,Raman scattering and its interaction with other nonlinear processes have not been extensively studied in dispersion-engineered LNOI *** this work,we characterise the Raman radiation spectra in a monolithic lithium niobate(LN)microresonator via selective excitation of Raman-active phonon *** dominant mode for the Raman oscillation is observed in the backward direction for a continuous-wave pump threshold power of 20mW with a high differential quantum efficiency of 46%.We explore the effects of Raman scattering on Kerr optical frequency comb *** achieve mode-locked states in an X-cut LNOI chip through sufficient suppression of the Raman effect via cavity geometry *** analysis of the Raman effect provides guidance for the development of future chip-based photonic devices on the LNOI platform.

关键词： scattering pump lithium