fixed myocardial defects in both stress and rest images, could be artifactual as a result of soft tissue attenuation. to increase specificity and identify the false positive results, we used gated technique to evaluate the wall motion and wall thickening as an index to differentiate real ischemic lesions from artifactual defects. 93 patients were studied. in 46 patients (48.8%) fixed perfusion ...

This paper describes a new approach to integrate low power methods in a design on architectural level. Starting from an asynchronous architecture presented as a data-flow graph, an activation interval analysis is conducted. The activation intervals describe a possible partitioning of a synchronous design. Each activation interval is a partition which is guarded by a gated clock. The transferabi...

Background FFR was initially validated against SPECT, Dobutamine Stress Echo and Exercise Testing [1]. It is now frequently used to determine the management of intermediate coronary artery stenosis. A cut-off value of 0.75 is used in clinical practice to guide revascularisation supported by long-term outcome data [2], but a ‘grey zone’ of 0.75-0.8 with uncertain clinical significance exists [3]...

Polling systems have been extensively studied, and have found many applications. They have often been used for studying wired local area networks such as token passing rings and wireless local area networks such as bluetooth. In this contribution we relax one of the main restrictions on the statistical assumptions under which polling systems have been analyzed. Namely, we allow correlation betw...

We consider a closed queueing network with a xed number of customers, where a single server moves cyclically between N stations, rending service in each station according to some given discipline (Gated, Exhaustive, or the Globally Gated regime). When service of a customer (message) ends in station j, it is routed to station k with probability P jk. We derive explicit expressions for the probab...

Supergiant fast X-ray transients are a new class of high mass X-ray binaries recently discovered with INTEGRAL. Hours long outbursts from these sources have been observed on numerous occasions at luminosities of ∼10-10 erg s, whereas their low level activity at∼10-10 erg s has not been deeply investigated yet due to the paucity of long pointed observations with high sensitivity X-ray telescopes...

Background Navigator gated coronary MRA is highly time inefficient as the data collection duty cycle (DC) is only 2% [1]. Here, we report a new, dynamic self-navigated coronary MRA technique with isotropic spatial resolution that a) further improves DC by continuously acquiring image data without ECG triggering and that b) enables retrospective, flexible, and individual selection of the acquisi...

The 2005 American Housing Survey reveals that 11% of residents on the west coast of the USA live in gated communities. The trend is not confined to America: just about all new housing built in China over the last 10 years is gated, with neighbourhood walls, guards, owner-governance structures, fees and neighbourhood management and investment plans based not on the municipal government model but...

We propose a method for treating the boundary conditions at the exposed surface of semiconductor nanostructures, and compare the results from simulations based on such a method with experimental measurements on test devices defined electrostatically by metal gates on AlGaAs/GaAs heterostructures. In particular, we show that the pinch-off voltage of quantum point contacts realized with split gat...

Introduction Elastic layered metal-organic framework (ELM) adsorbents exhibit a flexible two-dimensional latent porous crystalline structure. ELMs undergo abrupt reversible gated sorption transitions from an empty collapsed structure to a filled expanded porous state through cooperative adsorption of guest molecules between layer planes. Gated adsorption has been observed for methane, nitrogen,...