Because of special structure, a dual reflector antenna has beam rotation capability in azimuth and elevation directions. In this structure, the antenna beam can be placed in any point in the space by mechanical movement of twist reflector which it is the most important ability of the antenna. Due to the antenna structure, if the polarization of incident wave is linear, it is expected that the p...

In certain signal processing applications there is a need for fast implementations of sorting networks. Digital implementations of sorting networks that rely on a Digital Signal Processor core are not as efficient as their analog counterparts. This paper deals with the comparators for which simple analog implementations exist that employ operational amplifier-based adders, logarithmic and antil...

in present study, the density functional theory (dft-b3lyp) method with svp basis set was used for optimizing and studying the electronic structural properties of cis and trans isomers of bis-(5-nitro-2h-tetrazolato-n2) tetraammine cobalt (iii) perchlorate (bncp) as powerful explosives at 298.15 k temperature and 1 atmosphere pressure. and also, natural bond orbital (nbo) population analysis an...

Although a number of theories and principles have been developed to guide the creation of visualizations, it is not always apparent how to apply the knowledge in these principles. We describe the application of perceptual and cognitive theories for the analysis of uncertainty visualizations. General principles from Bertin, Tufte, and Ware are outlined and then applied to the analysis of eight d...

Systems analysis has been practiced by expert systems analysts or IT people in the third person perspective or objective one. We question this style of systems analysis and investigate into what it should be and who should practice it in an unpredictable, turbulent environment. The existing systems analysis methods such as UML help systems analysts ignore the differences of individual workers a...

Since the paper was published in SIGGRAPH 2003, the graphcut textures has become a popular and important technique for both static and dynamic image texture synthesis. However, the discussion on the theoretic side of the graphcut textures appears lacking with little information provided in the original paper to convince the reader the correctness of the approach. This paper addresses the import...

based on a meta-theoretical analysis of voting, the present paper is an attempt to present a theoretical model encompassing all the possible aspects of voting in an election action system, proposing four sub-systems of voting as follows: economic voting, political voting, cultural voting and moral voting. having distinguished among these sub-systems, the writer describes the constitutive elemen...