If the frequency of photon exceeds threshold, has enough energy to strike electron away and forms a hole in living tissue include eye. Longer time high-frequency electromagnetic radiation will cause more holes larger radius holes. Some visual light leak through cannot be refracted on macula, this is myopia symptom blurred vision, shortening distance eye object into cornea lens, another nearsigh...

I review the temporal/spectral data of accreting black hole sources paying most attention to the properties of the temporal variability such as photon energy dependent autoand cross-correlation functions, average shot profiles and hardness ratios, and the Fourier frequency dependent time/phase lags. These statistics characterize spectral changes at short time scales that are otherwise impossibl...

The electric field in irradiated silicon diodes was modified by manipulating the occupation of deep levels. This was achieved by continuous injection of holes using light illumination. Effective trapping probabilities and space-charge concentrations were measured in this operating mode. The bias voltage needed to establish the electric field in the whole detector volume, charge collection, powe...

We present the time variability characteristics of Cygnus X-1 in its two spectral states. The observations were carried out using the Pointed Proportional Counters (PPC) onboard the IndianX-rayAstronomyExperiment (IXAE). The details of the instrument characteristics, the observation strategy, and the backgroundmodelingmethods are described. In the soft state ofCygX-1,we confirm the general tren...

In this study, the effect of repair on fatigue life of tubular joints is investigated. Six cracked specimens precedently subjected to fatigue loading undergone to weld repair. Two of those specimens were shot peened before primary fatigue loading.  It is shown that repair gives rise to about 150% increase in fatigue life for original specimens while the increase of fatigue life for shot-peened ...

Firearms can cause fatal wounds, which can be identified by traces on or around the body. However, there are cases where neither the bullet nor gun is found at the crime scene. Ballistic research involving finite element models can reproduce computational biomechanical conditions, without compromising bioethics, as they involve no direct tests on animals or humans. This study aims to compare th...

background: regarding to the significant of the possibility of the malaria epidemic and nuisance of mosquitoes dur­ing the active season, the fauna and some ecological activities of mosquitoes in related to tree holes were investi­gated from april to december 2009 in neka county of mazandaran province, northern iran. methods: larval collection was carried out from natural, artificial breeding p...