Main stages of fractal modeling in material science

ترجمه کتاب روندهای اساسی در علم زبان the main trends in the science of language رومن یاکوبسن roman jakobson

رومن یاکوبسن (متولد 1896) یکی از نوابغ زبانشناسی مکتب پراگ است او به کمک یار همیشگی خود نیکولای تروبتسکوی (1890-1938) در تعیین خط مشی نهضت ساختگرایی اروپای شرق از همه موثرتر بودند. مهمترین تحقیقات این دو زبان شناسی در دهه قبل از جنگ جهانی دوم انجام گرفت . در زمان جنگ ، بواسطه اشغال چکسلواکی توسط آلمانها، پژوهش این اساتید متوقف گردید. یا کوبسن پس از جنگ کار خود را دنبال کرد و در زمینه واج شناسی ...

A review of agent-based modeling (ABM) concepts and some of its main applications in management science

We live in a very complex world where we face complex phenomena such as social norms and new technologies. To deal with such phenomena, social scientists often use reductionism approach where they reduce them to some lower-lever variables and model the relationships among them through a scheme of equations. This approach that is called equation based modeling (EBM) has some basic weaknesses in ...

Main Stages of Development of Geography

Crystallography in Material Science

We have investigated the nuclear density distributions in LaGaO3based perovskites, LaGaO3 (LG), (La0.9Sr0.1)GaO3(LSG), La(Ga0.9Mg0.1)O3(LGM), and (La0.8Sr0.2)(Ga0.8Mg0.15Co0.05)O3(LSGMC), to elucidate the ionic conduction path and disorder of oxide ions at elevated temperatures. Neutron diffraction data were collected in the temperature range from 26 to 1405oC in air, using a diffractometer HER...

Crystallography in Material Science

The compositions and purity of polycrystalline powder samples of Nd0.7Sr0.3 Mn1-x MgxO3 (x = 0.0, 0.1, 0.2, 0.3), LaCr1-xMnxO3 (x = 0.0, 0.1, 0.2, 0.3) and La1-x Ndx Cr0.5 Mn0.5 O3 (x = 0.0, 0.15, 0.2) were characterized by X-ray diffraction and chemical analysis. The magnetic properties were investigated by neutron powder diffraction technique and magnetization measurement using a SQUID. All t...