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High-efficiency reflector-less dual-level silicon photonic grating coupler

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光子学研究:英文版 2023年第7期11卷 1275-1283页

作者： VALERIO VITALI THALíA DOMíNGUEZ BUCIO COsIMO LACAVA RICCARDO MARCHETTI LORENZO MAsTRONAR TEERAPAT RUTIRAWUT glenn CHURCHILL JOAQUíN FANECA JAMEs C.GATEs FREDERIC GARDEs PERIKLIs PETROPOULOs Optoelectronics Research Centre University of SouthamptonSouthamptonSO171BJUK Electrical Computer and Biomedical Engineering DepartmentUniversity of Pavia27100 PaviaItaly Advanced Fiber Resources Milan s.r.l. 20098 San Donato MilaneseItaly Currently at Instituto de Microelectrónica de Barcelona IMB-CNM(CSIC)Campus UAB08193 BellaterraSpain

We present the design and experimentally demonstrate a dual-level grating coupler with subdecibel efficiency for a 220 nm thick silicon photonics waveguide which was fabricated starting from a 340 nm silicon-on-insulator *** proposed device consists of two grating levels designed with two different linear apodizations,with opposite chirping signs,and whose period is varied for each scattering unit.A coupling efficiency of-0.8 d B at1550 nm is experimentally demonstrated,which represents the highest efficiency ever reported in the telecommunications C-band in a single-layer silicon grating structure without the use of any backreflector or indexmatching material between the fiber and the grating.

关键词： waveguide scattering grating

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戴尔经理致惠普总裁的一封信

中外管理 2007年第8期 64-64页

作者： glenn Keels 戴尔商用服务器

将维护和运营费控制在IT总预算的30％，而创新占70％，已成为世界级企业的新追求。

关键词：总裁惠普经理戴尔世界级企业总预算 IT 运营

A Politics of Engagement: On stuart Hall, Cultural studies and Intellectual Practice

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Journal of Foreign Languages and Cultures 2017年第1期1卷 131-136页

作者： glenn Jordan Cardiff University

This paper discusses eleven key features of stuart Hall’s life and work:(1)his view that being an intellectual is a serious,often difficult vocation;(2)his commitment to studying the“here and now”—the present conjuncture;(3)his refusal to think of“the cultural”as separate from structures,relations,and practices of power;(4)his dedication to public engagement,including innovative use of television;(5)his practice of collaboration as a mode of intellectual production;(6)his privileging of the essay—the short intervention;(7)his recognition of the importance of oration,rhetoric,and performance—and learning to speak with multiple tongues;(8)his long-term engagements with artists—especially“Black”British artists;(9)his self-reflexive posture;(10)his commitment to practices of humility;and(11)his adoption of a critical-intellectual stance that is simultaneously optimistic and pessimistic.

关键词： cultural studies culture and power stuart Hall public intellectuals

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族群、社会流动与公共政策:美英比较

世界民族 2007年第2期 77-84页

作者： G·C·劳里[美]（） T·莫多德（） s·M·特莱斯（）易林（译）不详厦门大学公共事务学院社会学系厦门316005

编辑书籍就是把不同思维的观点编纂在一起。同时，在多数情况下，选择那些不同的思维都是为了一定的目的。我们这本书的目的可以从题目直接感觉到：“族群、社会流动与公共政策：美英比较”。编者把这么多的学者组合到一起的基本设想主... 详细信息

编辑书籍就是把不同思维的观点编纂在一起。同时，在多数情况下，选择那些不同的思维都是为了一定的目的。我们这本书的目的可以从题目直接感觉到：“族群、社会流动与公共政策：美英比较”。编者把这么多的学者组合到一起的基本设想主要有两个：社会流动是一个异质现象（heterogeneous phenomenon），即它在每个社会里以及对每个社会群体的运作方式并韭都县一样的。

关键词：社会流动公共政策族群社会群体思维编纂书籍编辑

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Energy shift

Overexpression of sHORT VEGETATIVE PHAsE-LIKE (sVL) in Populus delays onset and reduces abundance of flowering in field-grown trees

中国与非洲·英文版 2014年第2期 32-33页

作者： glenn Ashton

How China can assist Africa’s shift from fossil fuels toward renewable energy AFRICA represents the greatest opportunity of any continent for renewable energy *** has abundant natural energy resources including river... 详细信息

关键词：能量转移可再生能源化石燃料

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Horticulture Research 2021年第1期8卷 2404-2415页

作者： Greg s.Goralogia glenn T.Howe Amy M.Brunner Emily Helliwell Michael F.Nagle Cathleen Ma Haiwei Lu Amanda L.Goddard Anna C.Magnuson Amy L.Klocko steven H.strauss Department of Forest Ecosystems and society Oregon State UniversityCorvallisORUSA Department of Forest Resources and Environmental Conservation Virginia TechBlacksburgVAUSA Department of Biology University of Colorado Colorado SpringsColorado SpringsCOUSA

The spread of transgenes and exotic germplasm from planted crops into wild or feral species is a difficult problem for public and regulatory acceptance of genetically engineered plants,particularly for wind-pollinated trees such as *** report that overexpression of a poplar homolog of the floral repressor sHORT VEGETATIVE PHAsE-LIKE(sVL),a homolog of the Arabidopsis MADs-box repressor sHORT VEGETATIVE PHAsE(sVP),delayed the onset of flowering several years in three genotypes of field-grown transgenic *** expression of sVL correlated with a delay in flowering onset and lower floral abundance,and did not cause morphologically obvious or statistically significant effects on leaf characteristics,tree form,or stem *** effects on reproductive and vegetative phenology in spring was modest and *** results suggest that use of sVL and related floral repressors can be useful tools to enable a high level of containment for vegetatively propagated short-rotation woody energy or pulp crops.

关键词： field planted crops

Landmarks and new frontiers of computational fluid dynamics

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Advances in Aerodynamics 2019年第1期1卷 96-131页

作者： Joseph J.s.shang Wright state University 3640 Colonel Glenn HighwayDaytonOH 45435-0001USA

A narrative of landmarks in computational fluid dynamics(CFD)is presented to highlight the cornerstone *** accomplishments starting from the very beginning of the coherent development until the most recent progress will be elucidated over the span over more than six ***,the cuttingedge scientific innovations will also be discussed for their lasting impacts to fluid dynamics and the physics-based modeling and simulation *** traverse such a vast domain over time by a single presentation,numerous and excellent contributions to CFD will be unavoidably *** it is my ardent hope that the present discussion will be able to reaffirm excellence in research and to identify new frontiers for scientific ***,the challenges to future innovations will also be delineated to recommend for potential and fertile research areas for the modeling and simulation science.

关键词： Computational fluid dynamics Numerical algorithms Turbulence Interdisciplinary computational fluid dynamics

Damage mechanism identification in composites via machine learning and acoustic emission

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npj Computational Materials 2021年第1期7卷 852-866页

作者： C.Muir B.swaminathan A.s.Almansour K.sevener C.smith M.Presby J.D.Kiser T.M.Pollock s.Daly Materials Department University of California-Santa BarbaraSanta BarbaraCAUSA NAsA glenn Research Center ClevelandOHUSA Materials scienceand Engineering Department University of Michigan-Ann ArborAnn ArborMIUSA Mechanical Engineering Department University of California-Santa BarbaraSanta BarbaraCAUSA

Damage mechanism identification has scientific and practical ramifications for the structural health monitoring,design,and application of composite *** advances in machine learning uncover pathways to identify the waveform-damage mechanism relationship in higher-dimensional spaces for a comprehensive understanding of damage *** review evaluates the state of the field,beginning with a physics-based understanding of acoustic emission waveform feature extraction,followed by a detailed overview of waveform clustering,labeling,and error analysis *** requirements for damage mechanism identification in any machine learning framework,including those currently in use,under development,and yet to be explored,are discussed.

关键词： composites composite mechanism

Automated control and optimization of laser-driven ion acceleration

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高功率激光科学与工程:英文版 2023年第3期11卷 32-40页

作者： B.Loughran M.J.V.streeter H.Ahmed s.Astbury M.Balcazar M.Borghesi N.Bourgeois C.B.Curry s.J.D.Dann s.DiIorio N.P.Dover T.Dzelzainis O.C.Ettlinger M.Gauthier L.Giuffrida G.D.glenn s.H.Glenzer J.s.Green R.J.Gray G.s.Hicks C.Hyland V.Istokskaia M.King D.Margarone O.McCusker P.McKenna Z.Najmudin C.Parisuaña P.Parsons C.spindloe D.R.symes A.G.R.Thomas F.Treffert N.Xu C.A.J.Palmer school of Mathematics and Physics Queen’s University BelfastBelfastUK Central Laser Facility STFC Rutherford Appleton LaboratoryDidcotUK Gérard Mourou Center for Ultrafast Optical science University of MichiganAnn ArborMIUSA sLAC National Accelerator Laboratory Menlo ParkCAUSA Department of Electrical and Computer Engineering University of AlbertaEdmontonABCanada The John Adams Institute for Accelerator science Imperial College LondonLondonUK ELI Beamlines Centre Institute of PhysicsCzech Academy of SciencesDolníBˇrežanyCzech Republic Department of Applied Physics Stanford UniversityStanfordCAUSA Department of Physics SUPAUniversity of StrathclydeGlasgowUK Faculty of Nuclear sciences and Physical Engineering Czech Technical University in PraguePragueCzech Republic Department of Mechanical Engineering Stanford UniversityStanfordCAUSA Institut für Kernphysik Technische Universität DarmstadtDarmstadtGermany

The interaction of relativistically intense lasers with opaque targets represents a highly non-linear,multi-dimensional parameter *** limits the utility of sequential 1D scanning of experimental parameters for the optimization of secondary radiation,although to-date this has been the accepted methodology due to low data acquisition *** repetition-rate(HRR)lasers augmented by machine learning present a valuable opportunity for efficient source ***,an automated,HRR-compatible system produced high-fidelity parameter scans,revealing the influence of laser intensity on target pre-heating and proton generation.A closed-loop Bayesian optimization of maximum proton energy,through control of the laser wavefront and target position,produced proton beams with equivalent maximum energy to manually optimized laser pulses but using only 60%of the laser *** demonstration of automated optimization of laser-driven proton beams is a crucial step towards deeper physical insight and the construction of future radiation sources.

关键词： Bayesian optimization high repetition-rate laser-target interaction laser-driven particle acceleration proton generation