Estimation of the scientific risks of high dose radiation has been successfully quantified by many studies using several different approaches. However, the risk for low and low dose-rate radiation is obscure because of a lack of evidence. This risk is currently estimated by extrapolating the radiation response at high doses into low dose ranges for practical purposes. Recent challenges to exami...

objective(s):electromagnetic radiations which have lethal effects on the living cells are currently also considered as a disinfective physical agent.   materials and methods: in this investigation, silver nanoparticles were applied to enhance the lethal action of low powers (100 and 180 w) of 2450 mhz electromagnetic radiation especially against escherichia coli atcc 8739. silver nanoparticles ...

This paper presents the Navigation Maps Modeling approach (NMM), which provides platform independent models for characterizing navigation maps of web applications. The NMM approach is conceived to obtain a trade off between high and low-level design notations. As high-level design notations, NMM models permit architectural details that may hinder the overall understanding of the web application...

Dielectric loss from two-level states is shown to be a dominant decoherence source in superconducting quantum bits. Depending on the qubit design, dielectric loss from insulating materials or the tunnel junction can lead to short coherence times. We show that a variety of microwave and qubit measurements are well modeled by loss from resonant absorption of two-level defects. Our results demonst...

To establish a new technique for in-situ measurements of high-level tritium, applicability of the new measuring technique that is based on utilization of X-rays induced by β-rays from tritium was examined for three physical states of tritium such as gaseous tritium, aqueous tritium, and solid tritium retained on the surface and/or in bulk of the tritium-exposed materials in fusion reactors. It ...

We searched for coherent X-ray pulsations from Aql X-1 in a series of RXT E observations taken shortly after a recent outburst. During the course of these observations, Aql X-1 passes through an apparent ““ propeller ÏÏ phase as its luminosity fades to its quiescent value. No pulsations were detected, and we place upper limits (ranging from 0.52% to 9.0%) on the fractional rms amplitude of any ...

The design and implementation of a wireless infrared Ethernet link is considered. It is shown that, using commercially available devices, it is technical and economically feasible to implement wireless infrared extensions of Ethernet networks, maintaining the degree of complexity in transceiver electronics at very low level. In particular, it is shown that Manchester coding can still be used in...

There is no place on the Earth, the planet we live on, where the natural background radiation level is zero. Since the birth and even in our fetal stage, we have been exposed to different sources of natural radiation. Life, in fact, evolved in a radiation environment that was much more harsh than today. Earth serves as a source of terrestrial radiation. Uranium, thorium, and radium are among th...

We describe the beamline optics, the shutters and the femtosecond laser used in pump & probe experiments down to 50 picosecond resolution. The performance of in-vacuum undulators is compared to in-air undulators. It is concluded that single-harmonic in-vacuum undulators are optimal for pump and probe experiments based on single-bunch exposures. These low-K undulators can produce a spectral flux...