in this paper, free convection in an inclined stepped chamber has been studied. one wall of this enclosure is kept cold and the opposite wall equipped with constant heat source. the remaining walls are maintained adiabatic. there is one adiabatic step on the bottom wall. the aim of the present study is to forecast the effect of raleigh number, slope of enclosure, step dimension, and heat source...

normal axial alignment restoration in lower extremities is crucial for surgeons performing reconstructive surgeries. since reference normal values of axial alignment are affected by age, sex, and ethical issues, we tried to scrutinize these parameters in iranian adults and compare them with normal values in literatures. through a cross-sectional design, standing axial alignment views of lower e...

tehran shomal highway passes through alborz mountains with a tunnel length of 6400 meters. there are two main tunnels. a full three-dimensional (3d) numerical analysis coupled with elasto-plastic material models was conducted on the inclined access tunnel. bending moment, axial force and the lining displacements due to the internal forces applied on the shotcrete lining are calculated. axial fo...

In this paper the geometrical relationship of the folds which exist in the Folded Zagros Mountains, including Asef Mountain (northern Iran), were studied. The southern and western zones of the Zagros Mountains are called the Folded Zagros. These zones extend approximately 1,375 km in length with a width ranging from 120 to 250 km. Asef Mountain is located in northern Shiraz (from northern Sarda...

increasingly, aq qoyunlu rule and ottoman empire were inclined to contradict in the half of 9th/15th century. access to central anatolia for aq qoyunlu was a pivotal enterprise by which could develop its commercial ties. in contrast, ottomans tried to counteract the aq qoyunlu strives and thwarted its close relation with venice since ottomans regarded the latter as an archenemy in europe. forem...

This book consists of six substantive and relatively independent chapters addressing various aspects of Cuba’s economic system, the policies that have governed its functioning and potential changes in the near future. While the first chapter provides a historical overview of the policies followed by the Castro regime between 1960 and 2004, the last chapter focuses attention on possible future r...

This paper present a self-excited walking of a fourlink biped mechanism which possesses an actuated hip joint and passive knee joints. First we manifested that this self-excitation control enables 3-DOF planar biped model to walk on a level ground, by numerical simulation. Next we showed experimental study of a manufactured planar biped walking robot. We demonstrated that stable walking can be ...

This book consists of six substantive and relatively independent chapters addressing various aspects of Cuba’s economic system, the policies that have governed its functioning and potential changes in the near future. While the first chapter provides a historical overview of the policies followed by the Castro regime between 1960 and 2004, the last chapter focuses attention on possible future r...