development of the e-commerce in manufacturing companies and planning in this area requires knowledge on the factors affecting the decisions made by manufacturing companies to use e-commerce tools. these factors can be divided into two categories: internal and external. the internal factors show the characteristics of domestic firms that will shape their behavior, while the external factors rep...

the entanglement at zero-temperature is studied in a two-qubit xz spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. we have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. it is shown that the ground state of thesystem depends on the strength of exchange coupling. we have shown that the analytical relation oft...

the study compared economic efficiency among smallholder farmers who practiced low external input technology [leit] and high external input technology [heit] agriculture in a harsh macroeconomic environment typified by inadequate fertilizer subsidy in imo state, nigeria. cross sectional data generated from 160 smallholder farmers randomly selected from 2 out of the 3 agricultural zones in imo s...

in this work, we tried to know something more about the embryotoxicity effects of the doses of 50, 200, 400 mg/kg/day of ranitidine of (h2 antihistaminic agent) by intraperitoneal administration on mice. the studies were performed on albino mice kept under specific conditions and a constant dark-light cycle at 24+1c and 55+5% relative humidity. generally, the animals were acclimatized for four ...

background solvents such as benzene and toluene are commonly used in tire manufacturing, and significant occupational exposure to these chemicals adversely affects the health of workers. in biological monitoring, a complementary method for personal monitoring, the internal absorbed dose is measured and individual, environmental, and exposure differences are taken into consideration. conclusions...

â â â  as any method of criticisn enjoys a specific discourse and critics follow their specific style of criticism, crystallized in the concepts and, ideas they use or the mastery they show, this study investigates the critical concepts and strategies lå«wä«s 'äªwad uses in his work. we hope that we have been able to describe his characteristic critical style and his multidimensional appro...

the teratogenicity of cadmium exposure was studied in virgin nimri rats aged 10-13 weeks. pregnant animals were fed cadmium sulfate equivalent to doses of 1,4 and 7 mg/kg/day of cadmium by oral gavage on the day 7 of gestation. on the day 18 of gestation, fetuses were delivered and examined for external and skeletal malformations. total percent of malformed fetuses in rats treated by different ...

carotid body tumors (cbts) are rare, slow-growing tumors that should be considered in evaluating every lateral neck mass. this single center study was performed to define demographic features, clinical characteristics and remedies of iranian patients with cbt. a retrospective review of prospectively collected data was done on 45 patients with 50 cbts who have been referred to sina hospital, teh...

objective: an important factor in the prevention of industrial accidents is the employees’ ability to maintain their awareness of the work situation, understand the information it holds, and predict the development of the situations. in this study, we examined the role of work stress and sleepiness in predicting work situation awareness among workers.  methods: the present study was a cross-sec...