in this paper a new low profile substrate integrated waveguide (siw) probe-fed h-plane horn antenna structure with improved gain is proposed. the proposed antenna consists of two waveguides including a rectangular and a taper one, in which both, first and third modes of the structure are simultaneously excited leading to a uniform field distribution along the radiating aperture of the antenna a...

nowadays knowledge is a strategic and valuable resource as well as a property for any organization. without proper management and use of this valuable resource, providing good quality products and services is difficult and sometimes impossible. on the other hand, implementing knowledge management without appropriate structure is not possible. organizations should adopt structures that allow the...

in this paper, the fluid-structure interaction phenomenon and the research history are described. then due to the complex and specific working conditions of a turbine blade, we have investigated the phenomenon on this subject. the fluid-structure interaction on a turbine blade model has been simulated by using structural and fluid flow section of ansys software. a model of turbine blade with ai...

natural hazards such as earthquakes have threatened the life of human beings during the history.as a consequence, the vibration mitigation of structures has caught great importance. activecontrol of structures is one of the rapidly emerging areas in the concept of structural control. thispaper presents a control method to deal with this subject when the dynamics of the structure ishysteretic an...

among the most common type of literary, aesthetic and lyric literature by having the elements and themesimagery provides a good platform to analyze the structure of the word external and internal relationships because relationships based on the form and structure of speech is considered so by what is in the form of content main purpose of the speaker is the approach to the structure of the styl...

growing number of evidence indicates that individuals' motivational structure - the patterning of an individual's way of relating to goals - plays an important role in increasing the risk of alcohol use. adaptive motivational structure which includes pursuit of important, subjectively attainable, alcohol-unrelated goals is inversely related to substance use. the strength of this relationship in...

the high pressure behavior of the structural and electronic properties of kc1 is studied with use of the density functional pseudopotential method within local-density approximation. atzero pressure, the rocksalt phase is found to be lower in energy than cscl structure. however, we predict a phase transition into csci structure at a pressure of about 1.5 gpa. the calculated ground state propert...