Browsing by Title
Now showing items 2687-2706 of 2811
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Ubiquitous map image access through wireless overlay networks
(2004)With the availability of various wireless link-layer technologies, such as Bluetooth, WLAN and GPRS, in one wireless device, ubiquitous communications can be realized through managing vertical handoff in the environment ... -
UE Based Performance Evaluation of 4G LTE Network
(2019-05)In the past ten years, we have witnessed an increase in demand for mobile services as we have come to depend more and more on mobile phones as an indispensable part of everyday life. And not merely for making phone calls ... -
Ulysses COSPIN observations of cosmic rays and solar energetic particles from the South Pole to the North Pole of the Sun during solar maximum
(2003-06-30)In 2000–2001 Ulysses passed from the south to the north polar regions of the Sun in the inner heliosphere, providing a snapshot of the latitudinal structure of cosmic ray modulation and solar energetic particle populations ... -
Unambiguous evaluation of the relative photolysis rates of nitro indolinyl protecting groups critical for brain network studies
(2015-03)Nitrated indolinyl photoprotecting groups are crucial tools extensively used in the study of neuronal signal transduction. Mononitrated photolabile protecting groups have been used effectively, however, recent advances ... -
Unconventional optical imaging using a high speed, neural network based smart sensor
(2006-05-02)The advancement of neural network methods and technologies is finding applications in many fields and disciplines of interest to the defense, intelligence, and homeland security communities. Rapidly reconfigurable sensors ... -
Uncovering the deeply embedded active galactic nucleus activity in the nuclear regions of the interacting galaxy Arp 299
(2013-11-26)We present mid-infrared (MIR) 8-13 μm spectroscopy of the nuclear regions of the interacting galaxy Arp 299 (IC 694+NGC 3690) obtained with CanariCam (CC) on the 10.4 m Gran Telescopio Canarias (GTC). The high angular ... -
Understanding Department of Defense Employee Perceptions of Performance Appraisals: Making a Connection Between Performance Appraisals and Motivation
(2018-12)The purpose of this study was to examine employee perceptions of performance appraisals in the Department of Defense (DoD) and to examine potential connections between the performance appraisal process, employee motivation ... -
Understanding the cool DA white DWARF pulsator, G29-38
(1998-03-01)The white dwarfs are promising laboratories for the study of cosmochronology and stellar evolution. Through observations of the pulsating white dwarfs, we can measure their internal structures and compositions, critical ... -
Unexpected Effects: The Dual Effects of Prevalent Work Characteristics on Goal Accomplishment and the Moderating Role of Proactivity
(2018-07)The present study addressed the issue of the inability of current job design models to account for some of the complexities associated with prominent job characteristics (e.g., autonomy, task variety, and interdependence) ... -
Unicode compress: does size really matter?
(2002-07-31)The Unicode standard provides several algorithms, techniques, and strategies for assigning, transmitting, and compressing Unicode characters. These techniques allow Unicode data to be represented in a concise format in ... -
Unified Model Combining the Boundary Conditions Encountered at the Input, the Carrier Optical Fiber and the Output in Spatially Multiplexed Optical Communication Channels
(2019-04)Spatial domain multiplexing allows for expansion of optical fiber data rates by utilizing the spatial dimensions within the fiber. One form of this multiplexing method utilizes oblique input angles to generate ring-like ... -
A unique examination of the buffer overflow condition
(2002-08-27)Buffer overflows have been the most common form of security vulnerability for the last ten years. Moreover, buffer overflow vulnerabilities enable the type of exploits that dominate remote network penetration. As our ... -
Unique Solution to Periodic Boundary Value Problems
(1991)Existence of unique solution to periodic boundary value problems of differential equations with continuous or discontinuous right-hand side is considered by utilizing the method of lower and upper solutions and the monotone ... -
Uniqueness Criterion for Solution of Abstract Nonlocal Cauchy Problem
(1993)The aim of the paper is to prove an uniqueness criterion for a solution of an abstract nonlocal Cauchy problem. A dissipative operator in the nonlocal problem and an arbitrary functional in the nonlocal condition are ... -
Universal Communications Hub
To design a mobile communications system capable of maintaining a data and communications link in scenarios where traditional communications have been lost or are unavailable. In a practical scenario, this type of hub would ... -
Universal liquid level sensor employing fresnel coefficient based discrete fiber optic measurement technique
(2014-08-18)A compact and light weight liquid-level-measuring system based on fiber-optics sensor technology is presented as alternative to systems based on float gauges and other conventional level sensors for liquids that pose fire, ... -
Unmanned Aerial System Integration into National Airspace System and Airports: Risk Mitigation using Content Analysis Methodology
(2019-05)Over the last few years, the use of unmanned aerial systems (UAS) has significantly increased. With an increase in the use of UASs, the number of UAS sightings near manned aircraft and airports have also increased, as ... -
Unprecedented Disease-Related Coral Mortality in Southeastern Florida
(2016-08-10)Anomalously high water temperatures, associated with climate change, are increasing the global prevalence of coral bleaching, coral diseases, and coral-mortality events. Coral bleaching and disease outbreaks are often ...