We present the follow-up of three medium redshift galaxy clusters from the SHARC survey observed with Xmm–newton. We studied RX J0256.5+0006 which shows two components which are very likely in interaction. The smallest component exhibits a comet-like structure indicating ram pressure stripping as it falls onto the main cluster. The second cluster, RX J2237.0-1516 is an elliptical cluster with a...

Let X be a topological space and R be a subring of RX. By determining some special topologies on X associated with the subring R, characterizations of maximal fixxed and maximal growing ideals in R of the form Mx(R) are given. Moreover, the classes of zR-ideals and z0R-ideals are introduced in R which are topological generalizations of z-ideals and z0-ideals of C(X), respectively. Various c...

We present an area-efficient and low-power four-channel 25-Gb/s trans-impedance amplifier for Rx analog front-end (Rx-AFE) on optical receiver. The proposed circuit features a local negative-feedback (TIA) to expand the bandwidth. TIA post-amplifier use regulated cascode (RGC) topology two differential stages with inductive peaking bandwidth extension technique acquire 19.6 GHz of -3 dB 53.3 dB...

We present a phase-connected timing solution for the nearby isolated neutron star RX J1308.6+2127 (RBS 1223). From dedicated Chandra observations as well as archival Chandra and XMM-Newton data spanning a period of five years, we demonstrate that the 10.31-sec pulsations are slowing down steadily at a rate of Ṗ = 1.120(3)× 10 s s. Under the assumption that this is due to magnetic dipole torques...

PURPOSE To evaluate in vitro the capture efficiency of a distal protection filter (DPF) used during carotid artery stenting and examine the longitudinal vascular impedance in the presence of a DPF. METHODS Four approved DPFs (Spider RX, FilterWire EZ, RX Accunet, and FiberNet) were evaluated in a physiologically realistic in vitro setup. A pulsatile programmable piston pump circulated a blood...

[Introduction] When a radio frequency (RF) coil is designed and built for MR imaging, its performance is judged on the basis of achieving uniform imaging B1field and high signal-to-noise ratio (SNR). However, there is an intrinsic trade-off between B1-field uniformity and high SNR in the configuration of RF coil; a large RF coil tends to generate a more uniform B1-field but lower SNR, because i...

The fields of 8 X-ray sources in the Magellanic Clouds believed to be Be/X-ray binaries have been searched for possible Be star counterparts. BV Rc and Hα CCD imaging was employed to identify early type emission stars through colour indices and Hα fluxes. Spectroscopy of 5 sources confirms the presence of Hα emission in each case. Based on the positional coincidence of emission line objects wit...

In broadband single-carrier (SC) multi-user multipleinput multiple-output (MU-MIMO) transmissions, inter-symbol interference (ISI) caused by frequency-selectivity of the channel, inter-antenna interference (IAI), and inter-user interference (IUI) degrade the transmission quality. This paper proposes a minimum mean square error based joint transmit and receive linear spatial/frequency filtering ...

Vertebrate and invertebrate eye development require the activity of several evolutionarily conserved genes. Among these the Pax-6 genes play a major role in the genetic control of eye development. Mutations in Pax-6 genes affect eye development in humans, mice, and Drosophila, and misexpression of Pax-6 genes in Drosophila can induce ectopic eyes. Here we report the identification of a paired-l...