Thermal hydraulics of nuclear reactor as a basis of reactor safety has a very important role in reactor design and control. The thermal-hydraulic analysis provides input data to the reactor-physics analysis, whereas the latter gives information about the distribution of heat sources, which is needed to perform the thermal-hydraulic analysis. In this study single heated channel model as a very f...

Deep optical CCD images of the supernova remnant G 17.4–2.3 were obtained and faint emission has been discovered. The images, taken in the emission lines of Hα+[N ii], [S ii] and [O iii], reveal filamentary structures in the east, south–east area, while diffuse emission in the south and central regions of the remnant is also present. The radio emission in the same area is found to be well corre...

The field of peer-to-peer reputation systems has exploded in the last few years. Our goal is to organize existing ideas and work to facilitate system design. We present a taxonomy of reputation system components, their properties, and discuss how user behavior and technical constraints can conflict. In our discussion, we describe research that exemplifies compromises made to deliver a useable, ...

This paper deals with the methodology useable in the risk assessment of civil airport protection against acts of unlawful interference. Attention is focused on analyzing the current state of the airport perimeter and an analysis of risk assessment procedures in the safety management of civil airports.

Social networks have small-world property, hierarchical community structure, and some other properties. This paper proposes models of networks with these properties and algorithm for community structure recognition. The models are useable for testing effectiveness and efficiency of different algorithms for social network analysis. © 2010 Published by Elsevier B.V.

OBJECTIVE To determine potential effects of humidification on the volume of airway secretions in mechanically ventilated patients. METHODS Water vapor delivery from devices providing non-heated-wire humidification, heated-wire humidification, and heat and moisture exchanger (HME) were quantified on the bench. Then, patients requiring 24-hour mechanical ventilation were exposed sequentially to...

UNLABELLED The purpose of this study is to develop a method of quantitating the cerebral metabolic rate of glucose (CMRglc) by positron emission tomography using a population-based heated venous curve and one-point sampling from a non-heated vein, i.e. that can avoid arterial puncture. METHODS We conducted this study on 17 subjects with a mean age of 61 +/- 9 years. A time-concentration curve...

This paper investigates the suitability of a nickel chromium wire cutter (NCWC) for use on the GASPACS (Get Away Special Passive Attitude Control Satellite) Mission. It is intended that when activated the NCWC will cut through a restraining wire and thereby release the stored energy of the deployable AeroBoom. Flight worthiness is based on favorable performance during functional testing to addr...