We have proposed a new method of generating highly polarized positrons through Compton scattering of polarized laser lights o! relativistic electron beams and successive pair creation. To realize high-luminosity laser}electron collisions, we constructed a specially designed chamber which equips o!-axis parabolic mirrors with a through hole at the center. This mirror achieves strong focusing of ...

The world today is characterised by the proliferation of information sources available through media such as the WWW, databases, semi-structured files, etc. But, very often, this information is scattered, heterogeneous and weakly structured (semi-structured data). E-commerce is, by nature, one field in which this phenomena is specially strong. This paper overviews a mediator system for the cons...

*Corresponding author: Hassan Vatandoost, Medical Entomology and Vector Control, School of Public Heath, Tehran University of Medical Sciences, and Institute for Environmental Research, Tehran, Iran. Tel: 0098 21 88951393 E-mail: [email protected], [email protected] Foundation Project: Partially supported by Malaria Unit, CDC, Ministry of Health and Medical Education of Iran, Deputy for R...

*Corresponding author: Mahdieh Rezaei, Department of Clinical Science, Faculty of Veterinary Medicine, Shahid Bahonar University, Kerman, Iran. Tel: +989133431675 E-mail: [email protected] All experimental procedures involving animals were conducted in accordance to the Guide for Care and use of Laboratory Animals published by the National Institutes of Health (NIH publication No. 85–23,...

One of the most challenging aspects of the control theory is the design and implementation of controllers that can deal with changing environments, i. e., non stationary systems. Quite good progress has been made on this area by using different kind of models: neural networks, fuzzy systems, evolutionary algorithms, etc. Our approach consists in the use of a memory based evolutionary algorithm,...

The functional programming language ALDiSP which is specially tailored to the needs of DSP system speci ca tion is brie y presented ALDiSP is based on asynchronous concepts that make it easy to specify interrupt driven con trol ow It is shown how ALDiSP speci cations can be translated into e cient code using techniques of abstract interpretation and partial evaluation By applying abstract inter...

Electromagnetic scattering from coated nihility circular cylinders, illuminated by E-polarized plane wave, is investigated using an iterative procedure. Cylinders are infinite in length. The boundary conditions are applied on the surface of each cylinder in an iterative procedure in order to solve for the field expansion coefficients. The effect of different types of the coating layers includin...

Oberwetter, a senior pre-law student, was elected Thresher business manager in October, 1940, replacing Pat Nicholson, who had resigned to hold the office of 1940-41 editor. He had served earlier as associate business manager under Lee Capps. Oberwetter is vice president of the P r e L a w Association and a member of Roll and Quill and Rally Club. He applied February 1, 1942 for service in the ...

The halftone quality of an error diffusion halftone depends on the error filter response. Apart f o rm the magnitude response being a low pass, it is desirable to have a zero phase response. In this paper we propose the iterative error diffusion halftoning algorithm that allows use of non-causal error filter (such as zero phase error filter). W e present simulation results showing that the prop...

Since online customer review has significant impacts on customer's purchase decision and product sales, it has been regarded as a new marketing tool nowadays. Moreover, some online transactional platforms and sellers are trying to encourage customers to provide reviews of high-quality by offering a reward. With the empirical analysis of 1044 samples from a famous C2C e-platform website, results...