1,039 research outputs found
Sojourner, April 1992
No full textProducers: Su-Yin Lee, Elspeth Slayter, and Pat Thompson.University YW. (1992). Sojourner, April 1992. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/275182
Sojourner, October 1992
No full textProducers and Editors: Su-Yin Lee, Elspeth Slayter, and Pat Thompson.University YW. (1992). Sojourner, October 1992. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/275178
Sinophlaeobida taiwanensis Yin & Yin, 2007, sp. nov.
No full textSinophlaeobida taiwanensis sp. nov. Figs. A–F Type materials Holotype: male, China: Taiwan Pingtung, (22 ° 40 'N, 120 ° 29 'E), alt, 25m (K.S. Lin), 21 March 1980. Paratype: 1 female Pingtung (K.C. Chou & C.N. Lin) 4 August 1982; 1 male, same data as holotype; 1 female Pingtung (K.C. Lin & C.N. Lin) 3 August 1982 (AIT); 1 male, Pingtung Kenting (21 ° 57 'N, 120 ° 47 'E) (K.W. Wang) 23 May 1989; 1 male, Pingtung Manchou (22 °02'N, 120 ° 50 'E) alt, 31m, (K.W. Wang) 17 Jan. 1990; 1 male Pingtung Manchou, (H.T. Chen) 24 May 1998 (NMNH). Descriptions Male (figs. A-C). Body median in size. Head larger and short, shorter than length of pronotum. Face oblique distinctly in profile, with sulcus throughout, contracted distinctly in the median part. Antennae ensiform, widened distinctly in the basal part, toward apices gently narrow, 18 segments, surpassing over the posterior margin of pronotum, length of a middle segment 2.5 times its width. Eyes globose, longitudinal diameter 1.5 times horizontal diameter and 1.6 times subocular furrow. Pronotum cylindrical, median keel normal, low, slightly cut by hind transverse sulcus, lateral carinae parallel nearly, the prozona is 1.5 times of metazona in length, hind margin excised slightly in the middle. The length of interspace of mesosterum equal to the narrowest, lateral lobes of metasternum separated. Tegmina abbreviated, scale, lateral. Upper keel of hind femur serrated slightly, well proportioned, length as long as 4.6 times of maximum width, the end of lower knee lobes rounded. Hind tibia with 12 spines on the inner and 11 spines outer side, external apical spine absent. Second joint of hind tarsus shorter than the first joint. Tympanum organ distinct. Epiproct with longitudinal groove in the middle. Cercus slender, reaching to the tip of epiproct, furculae absent. Subgenital plate short, conical. Female (figs. D-F). Body larger, more robust. Antennae ensiform, 18 segments, shorter, not reaching to the posterior margin of pronotum. Longitudinal diameter of eyes 1.5 times horizontal diameter and equal to subocular furrow. The narrowest of interspace of mesosterum is 1.1 times its length. Length of the hind femur as long as 5.4 times of maximum width. Epiproct triangular, basal half part with longitudinal groove in the middle. Cercus short-conical, about reaching to the 2 / 3 of epiproct. Ovipositor valves short, distinctly hooked in the end, outer margin smooth. Coloration Males Body yellowish-brown. Antennae brown, apical three segments pale. Pronotum brown. Postocular band black, extending to the tegmina. Tegmina darker in anterior 2 / 3 part and yellowish-brown in posterior 1 / 3 part. Hind femur yellowish-brown, knee dark. Hind tibia brown, basal part dark. Abdomen and subgenital plate yellowish-brown. Females The color of body is similar to male. Acknowledgements This study is financially supported by the grants of the National Natural Sciences Foundation of Peoples Republic of China (No. 30630010) and the Chinese Academy of Sciences (No. KSCX 2 -YW-Z). We are grateful to Prof. Yien-Shing Chow, who is the former Director of National Museum of Natural Science, Taichung for his kind invitation to the first author to visit Taiwan. We are also grateful to Mr. K.S. Lin, K.C. Chou, C.N. Lin, K.W. Wang & H.T. Chen for collecting specimens. We thank Dr. Zhiwei Liu (Biological Science Department, Eastern Illinois University, U.S. A) for providing some references. FIGURES A–F Photographs of Sinophlaeobida taiwanensis sp. nov. A Side view of holotype; B Dorsal view of holotype; C Head and pronotum of holotype; D Head and pronotum of paratype; E Dorsal view of paratype; F Side view of paratype.Published as part of Yin, Xiang-Chu & Yin, Hong, 2007, A new genus and new species of Phlaeobinae from China (Orthoptera: Acrididae), pp. 65-68 in Zootaxa 1547 on pages 66-67, DOI: 10.5281/zenodo.27388
LIONS: An AWGR-Based Low-Latency Optical Switch for High-Performance Computing and Data Centers
No full textThis paper discusses the architecture of an arrayed waveguide grating router (AWGR)-based low-latency interconnect optical network switch called LIONS, and its different loopback buffering schemes. A proof of concept is demonstrated with a 4 x 4 experimental testbed. A simulator was developed to model the LIONS architecture and was validated by comparing experimentally obtained statistics such as average end-to-end latency with the results produced by the simulator. Considering the complexity and cost in implementing loopback buffers in LIONS, we propose an all-optical negative acknowledgement (AO-NACK) architecture in order to remove the need for loopback buffers. Simulation results for LIONS with AO-NACK architecture and distributed loopback buffer architecture are compared with the performance of the flattened butterfly electrical switching network
A scalable silicon photonic chip-scale optical switch for high performance computing systems
No full textThis paper discusses the architecture and provides performance studies of a silicon photonic chip-scale optical switch for scalable interconnect network in high performance computing systems. The proposed switch exploits optical wavelength parallelism and wavelength routing characteristics of an Arrayed Waveguide Grating Router (AWGR) to allow contention resolution in the wavelength domain. Simulation results from a cycle-accurate network simulator indicate that, even with only two transmitter/receiver pairs per node, the switch exhibits lower end-to-end latency and higher throughput at high (> 90%) input loads compared with electronic switches. On the device integration level, we propose to integrate all the components (ring modulators, photodetectors and AWGR) on a CMOS-compatible silicon photonic platform to ensure a compact, energy efficient and cost-effective device. We successfully demonstrate proof-of-concept routing functions on an 8 x 8 prototype fabricated using foundry services provided by OpSIS-IME. (C) 2013 Optical Society of Americ
Rapid and complete hitless defragmentation method using a coherent RX LO with fast wavelength tracking in elastic optical networks
No full textThis paper demonstrates a rapid and full hitless defragmentation method in elastic optical networks exploiting a new technique for fast wavelength tracking in coherent receivers. This technique can be applied to a single-carrier connection or each of the subcarriers forming a superchannel. A proof-of-concept demonstration shows hitless defragmentation of a 10 Gb/s QPSK single-carrier connection from 1547.75 nm to 1550.1 nm in less than 1 mu s. This was obtained using a small (0.625 kB) link-layer transmitter buffer without the need for any additional transponder. We also demonstrated that the proposed defragmentation technique is capable of hopping over an existing connection, i.e. 10 Gb/s OOK at 1548.5 nm, without causing any degradation of its real-time Bit Error Rate (BER) value. The proposed scheme gives advantages in terms of overall network blocking probability reduction up to a factor of 40. (C) 2012 Optical Society of Americ
Direct numerical simulation of turbulent Couette-Poiseuille flow with zero skin friction
No full textThe near-wall scaling of mean velocity U(y) is addressed for the case of zero skin friction on one wall of a fully turbulent channel flow. The present DNS results can be added to the evidence in support of the conjecture that U is proportional to √yw in the region just above the wall at which the mean shear dU/dy = 0
新一代多天线GPS系统研制
No full textAuthor name used in this publication: 丁晓利, DING Xiao-liAuthor name used in this publication: 黄丁发Author name used in this publication: YIN Jian-huaAuthor name used in this publication: 陈永奇Author name used in this publication: 孙永荣Author name used in this publication: 杨育文Title in Traditional Chinese: 新一代多天線GPS系統研製Journal title in Traditional Chinese: 測繪通報2003-2004 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe
A traction-free model for the tensile stiffness and bending stiffness of laminated ribbons of flexible electronics
No full textLaminated ribbons have been widely adopted for structures of flexible electronics to simultaneously achieve the electronic functions and mechanical performances. Their effective tensile stiffness and bending stiffness, which are extensively used as fundamental parameters
in the mechanical analysis, are usually obtained by the plane-strain hypothesis for simplicity. However, it is found that the practical condition is usually closer to the traction free, even for the cases with a relatively large width. Here, a traction-free model is proposed to analytically obtain the effective tensile stiffness and bending stiffness of laminated ribbons,
which can be used directly in the mechanical analysis of flexible electronics. The prediction of the traction-free model agrees very well with the precise result obtained by 3D finite element analysis (FEA) for the cases that are in the range of structure designs of flexible electronics. It is found that the tensile/bending stiffness of traction-free model is between the plane-stress model and plane-strain model, but is closer to the plane-stress model. The use of the plane-strain model sometimes may yield a considerable error in the mechanical analysis of flexible electronics. The parameter study shows that this model is very important for the problems with advanced materials, such as metamaterials with negative Poisson’s ratio. This work provides a theoretical basis for the mechanical analysis of flexible electronics.</p
Experimental demonstration of flexible bandwidth networking with real-time impairment awareness
No full textWe demonstrate a flexible-bandwidth network testbed with a real-time, adaptive control plane that adjusts modulation format and spectrum-positioning to maintain quality of service (QoS) and high spectral efficiency. Here, low-speed supervisory channels and field-programmable gate arrays (FPGAs) enabled real-time impairment detection of high-speed flexible bandwidth channels (flexpaths). Using premeasured correlation data between the supervisory channel quality of transmission (QoT) and flexpath QoT, the control plane adapted flexpath spectral efficiency and spectral location based on link quality. Experimental demonstrations show a back-to-back link with a 360-Gb/s flexpath in which the control plane adapts to varying link optical signal to noise ratio (OSNR) by adjusting the flexpath's spectral efficiency (i.e., changing the flexpath modulation format) between binary phase-shift keying (BPSK), quaternary phase-shift keying (QPSK), and eight phase-shift keying (8PSK). This enables maintaining the data rate while using only the minimum necessary bandwidth and extending the OSNR range over which the bit error rate in the flexpath meets the quality of service (QoS) requirement (e. g. the forward error correction (FEC) limit). Further experimental demonstrations with two flexpaths show a control plane adapting to changes in OSNR on one link by changing the modulation format of the affected flexpath (220 Gb/s), and adjusting the spectral location of the other flexpath (120 Gb/s) to maintain a defragmented spectrum. (C) 2011 Optical Society of Americ
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