in this study, he’s variational approach (va) is used to solve the non-naturalvibrations and oscillations. the method works very well for the whole range of initial amplitudesand does not demand small perturbation. it is also sufficiently accurate to both linear and nonlinearphysics and engineering problems. we consider some examples to illustrate the effectiveness andconvenience of the method....

aim of the present research was to design a proper model for management of knowledge in environmental organizations of country. in study of the model, suitability of the proposed model was researched by asking views of directors, deputies, managers of groups and scientific board members of environmental organizations of country. for this purpose, with review of research literature, insight pro...

rehabiliating bushehr historic fabric and paying to it as an important urban fabric through increasing capabilities and facilities is main concern. bushehr historical fabric can be the consequence of several factors the most important of which is the persian gulf and its past history as a national one. this fabric, is organic, dense, compact, having its own characteristics. one of its main prio...

the six-degree equations of flight in their classic form do not provide a proper physical perception due to a number of interferences. nor do they render visible the important role of attack angles. in this study, attempts have been made to develop a complete set of 3d acceleration equations from the equations of normal and tangential acceleration αn=vωv, αt=v ̇. for this purpose, a coordinate s...

During the past decade, dynamic data have been obtained by recording from various external monitor ing devices following administration of various ra dioactive tagged materials. From the clinical point of view, the most obvious advantage of these tech niques is the external monitoring aspect, which is both atraumatic and convenient. Conversely, this aspect has hindered a sophisticated analysis ...

The six-degree equations of flight in their classic form do not provide a proper physical perception due to a number of interferences. Nor do they render visible the important role of attack angles. In this study, attempts have been made to develop a complete set of 3D acceleration equations from the equations of normal and tangential acceleration αN=vωv, αt=v ̇. For this purpose, a coordinate s...

Rehabiliating Bushehr historic fabric and paying to it as an important urban fabric through increasing capabilities and facilities is main concern. Bushehr historical fabric can be the consequence of several factors the most important of which is the Persian Gulf and its past history as a national one. This fabric, is organic, dense, compact, having its own characteristics. One of its main prio...