Leveraging the dominance of Ethernet in LANs and SONET/SDH in MANs and WANs, we propose a service called CHEETAH (Circuit-switched High-speed End-to-End Transport ArcHitecture). The service concept is to provide end hosts with high-speed, end-to-end circuit connectivity on a call-by-call shared basis, where a " circuit " consists of Ethernet segments at the… (More)
We analyze how network throughput degrades in three MAN rings, SONET/SDH, packet-switched, and WDM, following a failure/restoration. For the same ring capacity, WDM rings offer the best network throughput before and after a link failure/restoration.
With the advent of Network-Centric Warfare (NCW) concepts, Command and Control (C2) Systems need efficient methods to produce, exchange, and consume diverse kinds of information within the networks. The System Entity Structure (SES) is an ontology framework that can facilitate information exchange in a network environment. From the perspective of the SES… (More)
BACKGROUND/AIMS Colon transit time (CTT) is a useful diagnostic tool in chronic constipation, but requires good patient compliance. We analyzed the correlation between the gas volume score (GVS) and CTT in patients with chronic constipation. METHODS The study included 145 consecutive patients (65 men) with chronic constipation. The primary outcome was the… (More)
Discrete Event System Specifications (DEVS) is a mathematical formalism based on system theoretic principles, which has evolved with state-of-technologies implementation over the past few decades. In this paper, we discuss a DEVS framework to solve parameter optimization problems. As a case study, we consider the Link-11 gateway that has been developed by… (More)
BACKGROUND Internet search query data reflect the attitudes of the users, using which we can measure the past orientation to commit suicide. Examinations of past orientation often highlight certain predispositions of attitude, many of which can be suicide risk factors. OBJECTIVE To investigate the relationship between past orientation and suicide rate by… (More)
BACKGROUND/AIMS Dieulafoy lesions (DLs) are a rare but significant cause of upper gastrointestinal bleeding. We aimed to define the clinical significance of rebleeding and identify the predictors of rebleeding and mortality in upper gastrointestinal Dieulafoy lesions (UGIDLs). METHODS Patients diagnosed with UGIDLs between January 2004 and June 2013 were… (More)