Results 31 to 40 of about 209,980 (256)

Information gap for classical and quantum communication in a Schwarzschild spacetime [PDF]

, 2012
Communication between a free-falling observer and an observer hovering above the Schwarzschild horizon of a black hole suffers from Unruh-Hawking noise, which degrades communication channels. Ignoring time dilation, which affects all channels equally, we
Carsten van de Bruck, D. R. Terno, Dominic Hosler, J. A. Wheeler, M. Nielsen, P. Kok, Pieter Kok   +6 more
core   +2 more sources

Wearable Tailored Passive Radiative Cooling Textile for Flexible Electronic Integration

Advanced Science, EarlyView.
A scalable, additive‐free wearable tailored passive radiative cooling textile (WRCT) with hierarchically structured fibers delivers exceptional thermal management, combining >95% solar reflectance, 0.96 mid‐infrared emissivity, and ultralow thermal conductivity (0.041 W/m·K).
Lung Chow, Jianpeng Zhang, Zehua Peng, Denglin Ye, Binbin Zhang, Jian Li, Wooyoung Park, Chentao Du, Xingcan Huang, Chun Ki Yiu, Yuze Qiu, Jingkun Zhou, Zhenlin Chen, Yuyu Gao, Weibin Zhu, Pengcheng Wu, Guangyao Zhao, Qiang Zhang, Yuan Guo, Zuowei Sun, Zhan Shen, Shuaiqi Ren, Sang Min Won, Jiyu Li, Xinge Yu   +24 more
wiley   +1 more source

Long Distance Business Travel and Mode Choice: The Results of Two Surveys of Business Travellers. [PDF]

, 1985
This report contains a descriptive analysis of two UK samples of lomg distance business travellers. Each sample answered the same mailback quesitonnaire which asked for detailed information about a recent long distance business trip and a limited amount ...
Fowkes, A.S., Johnson, I., Marks, P.
core  

Precise Tailoring 3D Printed In Situ Toughening Low‐k Microwave Transparent Structure via Thiol‐acrylate Chain Transfer Behavior

Advanced Science, EarlyView.
An in situ thiol–acrylate chain transfer‐mediated toughening strategy is introduced for Digital Light Processing (DLP) printing. Benefiting from its excellent printability, a printed gyroid lattice‐filled plate (100 µm wall thickness) achieves 92% transmittance at 10 GHz under a 50° incidence angle following structural optimization. ABSTRACT The unique
Ce Bian, Kai Zheng, Ruoyu Chen, Wansong Gu, Guanxiang Zhong, Difei Liang, Longjiang Deng, Hetao Chu   +7 more
wiley   +1 more source

Transport Infrastructure Investment and Demand Uncertainty [PDF]

In transportation planning there can be long lead times to adapt capacity. This paper addresses two questions. First, in a one mode world (say rail or road), what is the optimal capacity choice when faced with uncertain demand, long lead times and ...
Saskia van der Loo, Stef Proost
core   +3 more sources

Bioinspired Morphology‐Decoupled Soft Gripper with Enhanced Bidirectional Grasping Capability

Advanced Science, EarlyView.
Inspired by biological predation, a novel gripper decouples cross‐modal grasping via dual morphological configurations. Synergistically integrating hybrid rigid and soft coupled fingers with a metamaterial palm, the system performs active compliant grasping for static objects and passive cage capture for dynamic targets.
Yedong Huang, Dazhong Yu, Baijin Mao, Fangming Li, Juntian Qu   +4 more
wiley   +1 more source

On signalling over through-silicon via (TSV) interconnects in 3-D integrated circuits. [PDF]

, 2010
This paper discusses signal integrity (SI) issues and signalling techniques for Through Silicon Via (TSV) interconnects in 3-D Integrated Circuits (ICs). Field-solver extracted parasitics of TSVs have been employed in Spice simulations to investigate the
Grange, M., Pamunuwa, Dinesh B., Tenhunen, Hannu, Weerasekera, Roshan   +3 more
core   +2 more sources

Toward Reliable Metal Halide Perovskite FETs: From Electronic Structure and Device Physics to Stability and Performance Engineering

Advanced Electronic Materials, EarlyView.
Metal halide perovskite field‐effect transistors (PeFETs) offer great promise for flexible, low‐cost, and high‐performance due to their excellent charge carrier properties. However, challenges like ion migration, hysteresis, and instability limit their performance.
Georgios Chatzigiannakis, Anastasia Soultati, Leonidas C. Palilis, Ermioni Polydorou, Konstantinos Davazoglou, Petros‐Panagis Filippatos, Goutham Raj Perumallapelli, Ravindra Naik Bukke, Abd. Rashid bin Mohd Yusoff, Ilhwan Ryu, Peng Gao, Alexander Chroneos, Mohammad Khaja Nazeeruddin, Maria Vasilopoulou   +13 more
wiley   +1 more source

Auctions vs negotiations in public procurement: Which works better? [PDF]

, 2015
Public agencies mainly rely on two modes to procure goods and services: auctions and direct negotiations. We study a 1994 policy change in Germany that introduced the possibility to procure rail services in auctions as well as in direct negotiations with
Lalive, Rafael, Schmutzler, Armin, Zulehner, Christine   +2 more
core   +1 more source

Effect of Rail Support Mode on Wheel/Rail Dynamic Interaction of Metro Lines

Open Journal of Transportation Technologies, 2017
传统轨道结构中，钢轨铺设在均匀离散分布的轨枕上。钢轨支承方式不仅关系到轨道线路的建设造价，也对轨道车辆的运行安全与稳定有着重要的影响。本文基于车辆–轨道耦合动力学仿真，对钢轨连续及离散支承情形下地铁线路轮轨动力响应进行比较分析。计算结果表明，新型连续支承轨道结构上地铁车辆的轮轨力及钢轨的振动性能均优于传统的离散支承轨道。对于传统的钢轨离散支承地铁轨道，轨枕间距越小，车轮越过轨枕所引发的轮轨动态作用力和钢轨振动加速度越大。 Rails are discretely supported by uniformly distributed sleepers in traditional tracks.
openaire   +1 more source