recent developments in nanostructured products draw considerable attention to ultrafine grained materials. these materials are normally manufactured by different severe plastic deformation (spd) methods. in the present study, analytical models and finite element method (fem) are used to calculate strain imposed to a specimen that was deformed by equal channel angular pressing (ecap). in additio...

conclusions this study indicated that the rv systolic strain and strain rate can be used to detect early rv systolic dysfunction in ssc patients without pulmonary hypertension. these parameters may be useful for the provision of a more adequate management of ssc patients. results in the ssc patients, the rv strain (- 19 ± 10 vs. - 25 ± 4 %; p = 0.004) and the systolic strain rate (- 1.3 ± 0.5 v...

introduction: the term glaucoma refers to a group of diseases that have a characteristic optic neuropathy with associated visual field loss in common. intraocular pressure has been considered to be the only causal factor for glaucoma and the only factor that can be manipulated to alter the course of the disease. but considering high intraocular pressure as the only factor responsible for glauco...

aims: the performance of the vision system as the most important sense of the body depends largely on the optimum lighting of an environment. it is one of the factors that lead to vision problems such as visual fatigue of employees. this study aimed to assess the local lighting and visual fatigue among the official staff of an automotive industry development and research center which was conduc...

background: this study was performed to induce conversion of rh strain tachyzoites of toxoplasma gondii to bradyzoites by ph changing of the cul­ture medium. methods: hela cell monolayers were infected at a 1:1 tachyzoite to cell ratio. four hours after infection, the culture medium was removed and re­placed with culture medium and 5% fcs, adjusted to ph 8 with naoh. the culture was maintained ...

the objective of this study was to assess the importance of strain and sex and their interaction effect on broiler chickens’ performance and susceptibility to ascites. chicks from three strains (ross 308, cobb 500 and arian, labeled as a, b and c respectively) were obtained from the same age breeder and sexed when one-day-old. each crosses’ sex was assigned to four pens of 60 broilers each. bod...

conclusions it appears that the patient-caregiver education and follow-up program had a beneficial effect on the caregiver strain index compared to the usual care. results the caregiver strain index decreased significantly in the intervention group after the patient-caregiver education and follow-up (p < 0.001), while the control group’s scores did not change (p = 0.04). background in recent ye...

The Mw 7.9 Denali fault earthquake ruptured segments of the Susitna Glacier, Denali, and Totschunda faults in central Alaska, providing a unique opportunity to look for intermediate-term (weeks to months) responses of active volcanoes to shaking from a large earthquake. The Alaska Volcano Observatory (AVO) monitors 24 volcanoes with seismograph networks. We examined one station per volcano. Dig...

Long-period wave propagation in the upper mantle is investigated by constructing synthetic seismograms for proposed models. A model consisting of spherical layers is assumed. Generalized ray theory and the Cagniard-de Hoop method is used to obtain the transient response. Preliminary calculations on producing the phases P and P P by ray summation out to periods of 50 sec is demonstrated, and syn...