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Results 1 - 10
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1,871
Throughput region of finitebuffered networks
- IEEE Trans. Parallel Distrib. Syst
, 2007
"... Abstract—Most of the current communication networks, including the Internet, are packet switched networks. One of the main reasons behind the success of packet switched networks is the possibility of performance gain due to multiplexing of network bandwidth. The multiplexing gain crucially depends o ..."
Abstract
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Cited by 20 (1 self)
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. In particular, we study the throughput of flow-controlled loss-less networks with finite buffers. The main result of this paper is the characterization of a dynamic scheduling policy that achieves the maximal throughput with a minimal finite buffer at the internal nodes of the network under memory-less (e
Stability properties of constrained queueing systems and scheduling policies for maximum throughput in multihop radio networks
- IEEE Transactions on Automatic Control
, 1992
"... Abstruct-The stability of a queueing network with interdependent servers is considered. The dependency of servers is described by the definition of their subsets that can be activated simultaneously. Multihop packet radio networks (PRN’s) provide a motivation for the consideration of this system. We ..."
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Cited by 949 (19 self)
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. We study the problem of scheduling the server activation under the constraints imposed by the dependency among them. The performance criterion of a scheduling policy m is its throughput that is characterized by its stability region C,, that is, the set of vectors of arrival rates for which the system
1 The Saturation Throughput Region of p-Persistent CSMA
"... Abstract—Many modern wireless data networks employ Carrier Sense Multiple Access (CSMA) for efficient medium access. The p-persistent CSMA protocol is an analytically tractable version of CSMA that has been used successfully to model practical medium access protocols such as the IEEE 802.11 Distribu ..."
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.11 Distributed Coordination Function (DCF). We present a closedform expression to characterize the access probabilities at the boundary of the saturation throughput region of p-persistent CSMA. This expression is a non-trivial generalization of the elegant result, obtained by J. Massey and P. Mathys in 1985
Throughput region of randomaccess networks of general topology
- IEEE Transactions on Information Theory
"... A random access model is introduced and studied, which is a generalization of the classical Slotted Aloha model. Unlike in the Slotted Aloha, where two or more simultaneous transmissions on any subset of links collide and “erase” each other, a quite general interference structure is considered, wher ..."
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Cited by 3 (1 self)
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link throughput region and its Pareto boundary, are derived. In some cases, the Pareto boundary characterization is almost as simple and explicit as that derived in prior work for the classical Slotted Aloha system.
Reliable Multicast Transport Protocol (RMTP)
"... This paper presents the design, implementation and performance of a reliable multicast transport protocol called RMTP. RMTP is based on a hierarchical structure in which receivers are grouped into local regions or domains and in each domain there is a special receiver called a Designated Receiver (D ..."
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Cited by 654 (10 self)
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region, and this prevents acknowledgement implosion. Receivers in RMTP send their acknowledgments to the DRs periodically, thereby simplifying error recovery. In addition, lost packets are recovered by selective repeat retransmissions, leading to improved throughput at the cost of minimal additional
Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants: the Keio collection. Mol. Syst. Biol 2:2006.0008
, 2006
"... We have systematically made a set of precisely defined, single-gene deletions of all nonessential genes in Escherichia coli K-12. Open-reading frame coding regions were replaced with a kanamycin cassette flanked by FLP recognition target sites by using a one-step method for inactivation of chromosom ..."
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Cited by 714 (7 self)
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We have systematically made a set of precisely defined, single-gene deletions of all nonessential genes in Escherichia coli K-12. Open-reading frame coding regions were replaced with a kanamycin cassette flanked by FLP recognition target sites by using a one-step method for inactivation
Maximum Throughput Region of Multiuser Cognitive Access of Continuous Time Markovian Channels
"... Abstract—The problem of cognitive access of multiple primary channels by multiple cognitive users is considered. The primary transmission on each channel is modeled by a continuous time Markov on-off process. Cognitive access of the primary channels is realized via channel sensing. Each cognitive us ..."
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Cited by 5 (4 self)
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, is obtained by relating the sum throughput with the interference limits. It is shown that when collision constraints are tight, the outer and inner bounds match. This maximum throughput region result is further extended by a generalized periodic sensing scheme with a mechanism of timing sharing. Under general
Throughput Regions and Optimal Policies in Wireless Networks with Opportunistic Routing
"... Abstract-Opportunistic routing in wireless networks has been proposed as a method to combat the volatility of wireless links, by leveraging their broadcast nature and choosing the next hop for each transmitted packet post-facto, using the actual reception outcomes at the respective neighbors, rathe ..."
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, rather than based on a priori information. Much of the research on the topic has focused on protocol design issues, e.g. coordination mechanisms among the next-hop candidates; however, the fundamental performance bounds of the scheme are not yet known. In this paper we study the theoretical throughput
Human DNA methylomes at base resolution show widespread epigenomic differences.
- Nature,
, 2009
"... DNA cytosine methylation is a central epigenetic modification that has essential roles in cellular processes including genome regulation, development and disease. Here we present the first genome-wide, single-base-resolution maps of methylated cytosines in a mammalian genome, from both human embryo ..."
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Cited by 401 (6 self)
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enrichment in gene bodies and depletion in protein binding sites and enhancers. Non-CG methylation disappeared upon induced differentiation of the embryonic stem cells, and was restored in induced pluripotent stem cells. We identified hundreds of differentially methylated regions proximal to genes involved
Results 1 - 10
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1,871
