检索结果-南通市图书馆

Novel insights into regulation of butyrophilin molecules:critical components of cancer immunosurveillance by yo T cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2024年第4期21卷 409-411页

作者： dieter Kabelitz Institute of Immunology University of KielKielGermany

Members of the butyrophilin(BTN)family of transmembrane molecules play an important role in the activation of humanγδT *** recent years,it has been discovered that BTN3A1 and BTN2A1 are indispensable in this process,but other members like BTN3A2 and BTN3A3 are also *** far,very little is known about the transcriptional and post-translational regulation of BTN expression.

关键词： expression. insight critical

Highly efficient fiber to Si waveguide free-form coupler for foundry-scale silicon photonics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2024年第5期12卷 1055-1066页

作者： LUIGI RANNO JIA Xu BRIAN SIA COSMIN POPESCU DREW weninger SAMUEL SERNA SHAOLIANG YU LIONEL C.KIMERLING ANURADHA AGARWAL TIAN GU JUEJUN HU Department of Materials Science&Engineering Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA Centre for Micro-&Nano-Electronics(CMNE) Nanyang Technological UniversitySingapore 639798Singapore Department of Physics Photonics and Optical EngineeringBridgewater State UniversityBridgewaterMassachusetts 02324USA Zhejiang Laboratory Hangzhou 311100China Materials Research Laboratory Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA

As silicon photonics transitions from research to commercial deployment,packaging solutions that efficiently couple light into highly compact and functional sub-micrometer silicon waveguides are imperative but remain *** 220 nm silicon-on-insulator(SOI)platform,poised to enable large-scale integration,is the most widely adopted by foundries,resulting in established fabrication processes and extensive photonic component *** development of a highly efficient,scalable,and broadband coupling scheme for this platform is therefore of paramount *** two-photon polymerization(TPP)and a deterministic free-form micro-optics design methodology based on the Fermat’s principle,this work demonstrates an ultraefficient and broadband 3-D coupler interface between standard SMF-28 single-mode fibers and silicon waveguides on the 220 nm SOI *** coupler achieves a low coupling loss of 0.8 dB for the fundamental TE mode,along with 1 dB bandwidth exceeding 180 *** broadband operation enables diverse bandwidthdriven applications ranging from communications to ***,the 3-D free-form coupler also enables large tolerance to fiber misalignments and manufacturing variability,thereby relaxing packaging requirements toward cost reduction capitalizing on standard electronic packaging process flows.

关键词： fiber waveguide enable

The Effect of Uncaria gambir on Optical Properties and Thermal Stability of CNF/PVA Biocomposite Films

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2024年第9期12卷 1593-1603页

作者： Remon Lapisa Anna Niska Fauza dieter Rahmadiawan Krismadinata Dori Yuvenda Randi Purnama Putra Waskito Nandy Putra Hairul Abral Mechanical Engineering Department Universitas Negeri PadangPadang25173Indonesia Centre for Energy and Power Electronics Research Universitas Negeri PadangPadang25173Indonesia Department of Mechanical Engineering National Cheng Kung University(NCKU)Tainan70101Taiwan Mechanical Engineering Department Universitas IndonesiaDepok16424Indonesia Mechanical Engineering Department Universitas AndalasPadang25163Indonesia

Cellulose-based film has gained popularity as an alternative to synthetic polymers due to its outstanding *** all types of cellulose materials available,cellulose nanofiber(CNF)has great potential to be utilized in a diverse range of applications,including as a film *** this study,CNF biocomposite film was prepared by using polyvinyl alcohol(PVA)as a matrix and Uncaria gambir extract as a *** study aims to investigate the effect of Uncaria gambir extract on the optical properties and thermal stability of the produced *** formation of the CNF biocomposite films was confirmed using Fourier Transform Infrared Spectroscopy,their transmittance characteristics were measured using UV-Vis spectroscopy and a transmittance meter,while their reflectance was determined using a reflectance *** results revealed that the addition of Uncaria gambir extract to the CNF biocomposite film improved its UV-shielding properties,as indicated by the lower percentage of transmittance in the visible region,10%–70%.In addition,its reflectance increased to 10.6%compared to the CNF film without the addition of Uncaria gambir ***,the thermal stability of the CNF biocomposite film with the addition of Uncaria gambir extract improved to around 400℃–500℃.In conclusion,the results showed that CNF biocomposite film prepared by adding Uncaria gambir extract can be a promising candidate for optical and thermal management materials.

关键词： Cellulose nanofiber biocomposite film optical properties Uncaria gambir thermal stability

Highly-efficient VCSEL breaking the limit

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第6期13卷 1021-1021页

作者： dieter Bimberg Fumio Koyama Kenichi Iga TU Berlin Hardenbergstr.3610623BerlinGermany Bimberg Chinese-German Center for Green Photonics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesNo.3888 Dong Nan Hu RoadChangchun130033China Tokyo Institute of Technology Nagatsuta 4259Midori-kuYokohama226-8501Japan

VCSELs have become indispensable in the realms of datacenter networks and three-dimensional sensing thanks to their high-energy efficiencies,low-cost and the scalability of their two-dimensional *** boast high energy-efficiency,exceeding 50%at low bias currents,superiority over edge-emitting lasers,particularly for optical interconnects within datacenter ***,there has been no breakthroughs in the efficiency of VCSELs for over a decade.

关键词： limit breakthrough Highly

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高速垂直腔面发射激光器热管理研究进展

激光与光电子学进展 2024年第15期61卷 14-22页

作者：孙家辉田思聪 Ahamed Mansoor 王宇昊潘绍驰徐汉阳佟存柱王立军 dieter Bimberg 中国科学院长春光学精密机械与物理研究所Bimberg中德绿色光子学研究中心吉林长春130033 中国科学院大学北京100049 中国科学院长春光学精密机械与物理研究所发光学及应用国家重点实验室吉林长春130033 柏林工业大学固体物理研究所纳米光学中心德国柏林D-10623

垂直腔面发射激光器(VCSEL)与并行光传输、光互连等领域的数据传输需求相契合,能够应用于单通道和并行光互联网络,是宽带以太网、高速数据通信中关键的光电子器件。而热效应严重限制了VCSEL的带宽等高速调制性能并影响输出的稳定性,通... 详细信息

垂直腔面发射激光器(VCSEL)与并行光传输、光互连等领域的数据传输需求相契合,能够应用于单通道和并行光互联网络,是宽带以太网、高速数据通信中关键的光电子器件。而热效应严重限制了VCSEL的带宽等高速调制性能并影响输出的稳定性,通过优化电流分布、调整氧化孔径、减薄衬底、使用高热导率的材料、键合热沉等方式有助于VCSEL的热耗散。本文综述了VCSEL热管理等方面的研究进展,这对于提升其高速调制性能至关重要,最后介绍了本课题组最新设计的具有高效散热结构的高速多孔孔径VCSEL。

关键词：高速垂直腔面发射激光器多孔孔径垂直腔面发射激光器热效应调制带宽传输速率

在线全文

学校读者我要写书评

暂无评论

单模电注入面发射激光器研究进展

激光与光电子学进展 2024年第17期 1-14页

作者：艾星辰田思聪 Mansoor Ahamed 孙家辉王宇昊潘绍驰佟存柱王立军 Bimberg dieter 中国科学院长春光学精密机械与物理研究所Bimberg中德绿色光子学研究中心中国科学院大学中国科学院长春光学精密机械与物理研究所发光学及应用国家重点实验室柏林工业大学固体物理研究所纳米光学中心

互联网、超算中心、数据中心光互连等高速光通信领域，以及激光雷达、显示等应用，均对半导体激光器提出单模、单偏振态、高速、高功率等更高性能要求。本文梳理了以垂直腔面发射激光器（VCSEL）、光子晶体面发射激光器等为主的电注入... 详细信息

互联网、超算中心、数据中心光互连等高速光通信领域，以及激光雷达、显示等应用，均对半导体激光器提出单模、单偏振态、高速、高功率等更高性能要求。本文梳理了以垂直腔面发射激光器（VCSEL）、光子晶体面发射激光器等为主的电注入表面发射型半导体激光器的研究进展，包括：为了同时实现单模和单偏振性，设计表面光栅、浮雕和高折射率对比度光栅VCSEL；为了实现单模高速特性，引入锌扩散区、建立横向耦合腔、构建多孔结构氧化限制VCSEL；为了实现单模、高功率性，采用构建慢光表面光栅负载VCSEL、引入锌扩散区、设计多结或多氧化孔径VCSEL等方式；为了实现突破性的单模、高功率、极小发散角等性能，采用光子晶体面发射激光器。最后对面发射激光器发展趋势做出展望。

关键词：垂直腔面发射激光器单模光高速传输高功率激光光子晶体面发射激光器

Designing a power plant with highest efficiency:results from SFB 561

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

航空动力学报 2009年第4期24卷 717-728页

作者： dieter Bohn Institute of Steam and Gas Turbines RWTH Aachen University

The goal of Collaborative Research Centre(SFB) 561 "thermally highly loaded,porous and cooled multi-layer systems for combined cycle power plants" is to expand the current technological and scientific knowledge on power plants in order to achieve total efficiencies of 65% in a combined cycle power plant in the year ***,the aero-thermomechanical,structural-mechanical,materials' scientific and production fundamentals for the development of steam and gas turbine components that are able to withstand highest thermal loads are being worked out within this *** means for the gas turbine that combustion chamber outlet temperatures of 1520℃ at 1.7MPa are to be *** order to control these high temperatures,it is not only required to develop new materials' solutions,including thermal barrier coatings,but also to apply improved cooling techniques,as for example effusion *** novel cooling concept is to be realised through open-porous *** structures can consist of drilled open-porous multi-layer systems or open-porous metallic *** development of graded multi-layer systems is also extremely important,as the grading will enable the use of coolant in dependence of the *** live steam parameters in the high pressure turbine are expected to be increased up to approximately 700℃ with pressure of *** elevated steam parameters can be encountered with Ni-base alloys,but this is a costly alternative,associated with many manufacturing ***,the SFB proposes cooling the highly loaded turbines instead,as this would necessitate the application of far less Ni-base *** protect the thermally highly loaded casing,a sandwich material consisting of two thin face sheets with a core of a woven wire mesh is used to cover the walls of the steam turbine *** current state of the research shows that by utilising innovative cooling technologies a total efficiency of 65% can be reached without exceeding the m

关键词： gas turbine steam turbine cooling novel materials process calculation

Hybrid system-a promising way solving future energy problems

在线全文

学校读者我要写书评

暂无评论

航空动力学报 2007年第4期22卷 565-576页

作者： dieter Bohn Institute of Steam and Gas Turbines RWTH Aachen University

With the increasing demand for electricity,an efficiency improvement and thereby reduced CO2 emissions of the power plants are expected in order to reach the goals set in the Kyoto *** comparison to conventional systems,the hybrid-systems with the use of synergetic effects offer the possibility to provide a substantial contribution to spare our natural resources and protect our *** Cycle Power Plants belongs innately hybrid system in the centralized energy *** can provide large amounts of power and have a quick start-up *** MGT/FC hybrid system is quite promising in the decentralized energy *** is widely used in stand-alone ***,the combination of fossil and renewable power plant technologies contains a large synergy potential to increase the efficiency of processes for power *** materials,innovative cooling technology,new combustion concepts and optimized production methods are needed to make the potential of these new technologies accessible for a quantum leap in the *** this it needs considerable research work and good coordinated research projects between the state,industry,research laboratories and universities.

关键词：航空推进系统混合燃料涡轮机能源

The Vγ4/butyrophilin conspiracy: novel role of intraepithelial γδ T cells in chronic inflammatory bowel disease

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2023年第12期8卷 5575-5577页

作者： dieter Kabelitz Institute of Immunology Christian-Albrechts University Kiel and University Hospital Schleswig-Holstein Campus KielKielGermany

In a recent article published in Science,Dart and colleagues reported that colonic T cells expressing the Vγ4 T-cell receptor(TCR)interact with epithelial butyrophilin-like(BTNL)proteins BTNL3 and BTNL8 in healthy individuals,and they observed a depletion of Vγ4 T cells in inflammatory bowel diseases with renormalization associated with disease remission.1 This paper identifies the BTNL/Vγ4 axis as a new disease modifier in IBD.

关键词： bowel inflammatory diseases