6,841 research outputs found
Resource-efficient wireless relaying protocols
No full textRelay-aided communication is considered one of the key techniques to achieve high throughput at low cost in future wireless systems. However, when transmitting signals via a relay, additional time slots, antennas, or frequency slots are required, which may erode the potential gain of relay-aided systems. In this article various approaches to creating relay-aided systems are reviewed. The advantages and disadvantages of various relaying schemes are compared in terms of their slot efficiency, error rate performance, and feasibility. Our detailed comparisons and the numerical results indicate that the specific family of network coding aided relaying protocols constitutes one of the most promising solutions. We conclude this article by listing a number of open problems
Carol Lee Rush : B.S., 1959
No full textAdm: 9/23/54; Hope to obtain a position as librarian; Married; Henry Lee Dorsey - 4-15-61https://ida.gallaudet.edu/alumni-cards/5345/thumbnail.jp
Fabrication and Evaluation of a MEMS Piezoelectric Bimorph Generator for Vibration Energy Harvesting
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Low cycle fatigue behavior of 429EM ferritic stainless steel at elevated temperatures
No full textIn recent, ferritic stainless steels are widely used in high temperature structure because of their high resistance in thermal fatigue and low prices. Tensile and low cycle fatigue(LCF) tests on 429EM stainless steel were performed at several temperatures from room temperature to 600degreesC. Elastic modulus, yield stress and ultimate tensile strength(UTS) decreased with increasing temperature. Considerable cyclic hardening occurred at 200degreesC and 400degreesC. 475degreesC embrittlement observed could not explain this phenomenon but dynamic strain aging(DSA) observed from 200degreesC to 500degreesC could explain the hardening mechanism at 200degreesC and 400degreesC. And it was observed that plastic strain energy density(PSED) was useful to predict fatigue life when large cyclic hardening occurred. Fatigue life using PSED over elastic modulus could be well predicted within 2X scatter band at various temperatures
Delamination and low velocity impact characteristics of smart composite with embedded optical fibers
No full textG. Richard Lee, M.D.
No full textDr Lee was born in Ogden, Utah in 1932. Dr Lee received his B.S. (1953) and his M.D. (1956) from the University of Utah. Dr Lee did his Internship at Boston City Hospital from 1956-1957. Dr Lee returned to the University where he completed his Residency and was a Postdoctoral Fellow in clinical hematology from 1957-1963. Dr Lee was Associate Professor from 1963-1973. Dr Lee was Associate Dean of Academic Affairs from 1973-1976. Dr Lee became Professor of Medicine in 1973. Dr Lee was Dean of the School of Medicine from 1978-1984. Dr Lee retired in 1996 as Emeritus Professor of Internal Medicine. Dr Lee died in 2022
Custis-Lee Mansion, Arlington, Virginia, circa 1907-1914
No full textColor image of the Custis-Lee Mansion in Arlington, Virginia, circa 1907-1914. Reverse caption reads: "Custis-Lee Mansion, Arlington, Virginia. The Custis-Lee Mansion at Arlington, Va., was the home of George Washington Parke Custis, adopted son of Washington. It was afterward the home of Colonel Robert E. Lee, whose wife was Mary Custis. During the Civil War the Arlington Estate became a military cemetery. The Mansion is preserved as it was in the days of Custis and Lee." Postcard number: 896
A Self-Organizing Finite-Element Tessellation Mesh Generator for Electromagnetic Field Problems
No full textAll-optical TDM data demultiplexing at 80 Gbit/s with significant timing jitter tolerance using a fiber Bragg grating based rectangular pulse switching technology
No full textWe demonstrate the use of fiber Bragg grating based pulse-shaping technology to provide timing jitter tolerant data demultiplexing in an 80 Gb/s all-optical time division multiplexing (OTDM) system. Error-free demultiplexing operation is achieved with ~6 ps timing jitter tolerance using superstructured fiber Bragg grating based 1.7 ps soliton to 10 ps rectangular pulse conversion at the switching pulse input to a nonlinear optical loop mirror (NOLM) demultiplexer comprising highly nonlinear dispersion shifted fiber (HNLF). A 2-dB power-penalty improvement is obtained compared to demultiplexing without the pulse-shaping grating. <br/
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