Catalogue Search | MBRL
هل أنت متأكد أنك تريد إزالة الكتاب من الرف؟
{{itemTitle}}
235
نتائج ل
"Shea, John M"
صنف حسب:
Gross things about your body
Readers learn about the human body by looking at its gross aspects.
Book
Secret Sharing over Fast-Fading MIMO Wiretap Channels
Secret sharing over the fast-fading MIMO wiretap channel is considered. A source and a destination try to share secret information over a fast-fading MIMO channel in the presence of an eavesdropper who also makes channel observations that are different from but correlated to those made by the destination. An interactive, authenticated public channel with unlimited capacity is available to the source and destination for the secret sharing process. This situation is a special case of the \"channel model with wiretapper\" considered by Ahlswede and Csiszár. An extension of their result to continuous channel alphabets is employed to evaluate the key capacity of the fast-fading MIMO wiretap channel. The effects of spatial dimensionality provided by the use of multiple antennas at the source, destination, and eavesdropper are then investigated.
Journal Article
An analysis of ED utilization by adults with intellectual disability
Abstract Objectives We sought to identify factors increasing the odds of ED utilization among intellectually disabled (ID) adults and differentiate their discharge diagnoses from the general adult ED population. Methods This was a retrospective, observational open cohort study of all ID adults residing at an intermediate care facility and their ED visits to a tertiary center (January 1, 2007–July 30, 2008). We abstracted from the intermediate care facility database subjects' demographic, ID, health and adaptive status variables, and their requirement of ED care/hospitalization. We obtained from the hospital database the primary International Classification of Diseases 9 ED/hospital discharge diagnoses for the study and general adult population. Using multivariate logistic regression, we computed odds ratios (OR) for ED utilization/hospitalization in the cohort. Using the conditional large-sample binomial test, we differentiated the study and general populations' discharge diagnoses. Results A total of 433 subjects met the inclusion criteria. Gastrostomy/jejunostomy increased the odds of ED utilization (OR, 4.16; confidence interval [CI], 1.64-10.58). Partial help to feed (OR, 2.59; CI, 1.14-5.88), gastrostomy/jejunostomy (OR, 3.26; CI, 1.30-8.18), and increasing number of prescribed medications (OR, 1.08; CI, 1.03-1.14) increased the odds of hospitalization. Auditory impairment (OR, 0.45; CI, 0.23-0.88) decreased the odds of hospitalization. For ED discharge diagnoses, ID adults were more likely ( P < .05) than the general population to have diagnoses among digestive disorders and ill-defined symptoms/signs. For hospital discharge diagnoses, ID adults were more likely ( P < .05) to have diagnoses among infectious/parasitic, nervous system, and respiratory disorders. Conclusion Among ID adults, feeding status increased the odds of ED utilization, feeding status, and increasing number of prescribed medications of that hospitalization. Intellectually disabled adults' discharge diagnoses differed significantly from the general adult ED population.
Journal Article
The respiratory system
This book covers the structure and function of the respiratory system, as well as the importance of maintaining healthy lungs.
Book
ON THE OPTIMAL RECEIVER ACTIVATION FUNCTION FOR DISTANCE-BASED GEOGRAPHIC TRANSMISSIONS
In wireless networks, the channels are often subject to random variations that limit the reliability of communications between any two radios. Geographic transmission strategies can improve the performance in such networks by allowing any of a transmitter's neighbors that successfully receive a transmission and are in the direction of the packet's destination to forward the packet to the destination. However, requiring all of the radios in a network to keep their receivers on to receive geographic transmissions will significantly shorten the network lifetime by depleting the energy of the radios in the network. In this work, we investigate an optimal strategy for deciding which neighbors of a transmitter should activate to try to recover a transmission. We find a solution to this problem by solving for a related measure in a constrained optimization problem. We present results that compare the performances of the optimal approach, our previous suboptimal efforts, and a conventional approach.
Journal Article
Cooperative-diversity slotted ALOHA
We propose a cooperative-diversity technique for ad hoc networks based on the decode-and-forward relaying strategy. We develop a MAC protocol based on slotted ALOHA that allows neighbors of a transmitter to act as relays and forward a packet toward its final destination when the transmission to the intended recipient fails. The proposed technique provides additional robustness against fading, packet collisions and radio mobility. Network simulations confirm that under heavy traffic conditions, in which every radio always has packets to send, the proposed cooperative-diversity slotted-ALOHA protocol can provide a higher one-hop and end-to-end throughput than the standard slotted-ALOHA protocol can. A similar advantage in end-to-end delay can be obtained when the traffic is light. As a result, the proposed cooperative-diversity ALOHA protocol can be used to improve these measures of Quality of Service (QoS) in ad hoc wireless networks. [PUBLICATION ABSTRACT]
Journal Article
Thomas Jefferson in his own words
Describes the life and accomplishments of the United States Founding Father and third president, from his childhood in Virginia and his early political career to the drafting of the Declaration of Independence and the founding of the University of Virginia.
Book
Lipid metabolism in Cryptococcus neoformans
In recent years, lipids have been shown to act as signalling molecules not only in mammalian cells but also in many other eukaryotes. Whereas in mammalian cells lipids regulate cellular functions that play crucial roles in the regulation of pathobiological processes, such as cancer, cardiovascular and neurodegenerative disorders, and inflammation, in the fungus Cryptococcus neoformans lipids play key roles in the regulation of pathogenic traits required for the development of cryptococcosis, an infectious disease particularly frequent in immunocompromised individuals. In this minireview we discuss recent advances in the understanding of lipid metabolism in this important human pathogen, highlighting the potential of fungal lipid enzymatic pathways as promising new drug targets.
Journal Article