Perinatal Campylobacter jejuni infection after Cesarean section

A 23 year old woman was admitted for delivery after having experienced a few episodes of loose stools. Following an unsuccessful vacuum-extraction, a Caesarean section was performed 12 hours after the membranes had ruptured. Thirty-six hours after the operation, the woman developed fever, and Campylobacter jejuni was isolated from her blood. Subsequently, Campylobacter was also recovered from the faeces of both mother and child. Though it is likely, that the Campylobacter was introduced to the uterus after rupture of the membranes, a transplacental infection can not be ruled out.     

Analytic approximation of the jitter incurred by CBR traffics in IP networks

In this paper, an analytic approximation is derived for the end-to-end delay-jitter incurred by a periodic traffic with constant packet size. The single node case is considered first. It is assumed that the periodic traffic is multiplexed with a background packet stream under the FCFS service discipline. The processes governing the packet arrivals and the packet sizes of the background traffic are assumed to be general renewal processes. A very simple analytical approximation is derived and its accuracy is assessed by means of event-driven simulations. This approximation is then extended to the multiple node case yielding a simple analytical approximation of the end-to-end jitter. This approximation is shown to be fairly accurate in the light to moderate traffic conditions typically encountered in IP core networks.     

Temperature Measurement: Christiansen Wavelength and Blackbody Reference

The aim of this paper is to propose simple and reliable methods to measure temperatures exceeding 1500°C by pyrometry on dielectric heteropolar compounds. By adopting a spectroscopic approach based on a knowledge of the material (chemical composition, texture, size), it is suggested first to work at the Christiansen wavelength that is nearly independent of temperature, the texture, and the shape. Second, recent developments concerning plate blackbodies that are operable up to 1600 K are presented. Such compact systems are suitable to be installed in industrial heating devices in order to easily calibrate the pyrometer. Paper presented at the Seventh International Workshop on Subsecond Thermophysics, October 6–8, 2004, Orléans, France.     

Proprietes physiques du seleniure de cuivre CuSe

Suitable single crystals of CuSe have been obtained for crystallographical investigations. Hexagonal superlattice structure of α CuSe and polymorphism as function of temperature are confirmed. Electrical measurements indicate a metallic behaviour.     

A new support for semi-permeable membranes

The new type of support, known as “cord” described in this paper is a form of capillary tube. It consists of lengths of hollow textile materials of extremely varied nature and texture. The ability of these materials to withstand pressure while retaining satisfactory porosity is achieved by an appropriate combination of heat and mechanical treatments. When coated with suitable collodion formulations, they can be employed for applications relating to ultrafiltration, reverse osmosis or gas diffusion.Their flexibility is such that they can be employed in a variety of applications involving modular technology, parallel tube bundles, spiral-wound arrangements, etc.     

Trois phases du ternaire CuTlS

Ternary compounds CuTlS₂, CuTlS and Cu₂Tl_0,5S₂ have been prepared and caracterized by their crystallographic parameters. Meanwhile the first one is semiconductor, the other two have a metallic behaviour between 77°K and 300°K.