a simple mathematical model of steady state  oxygen distribution subject to diffusive transport and non- linear uptake in a retinal cylinder has been developed. the approximate analytical solution to a reaction- diffusion equation are obtained by using series expansions. the computational results for the scaled variables are presented through graphs. the effect of the important parameters (1) d...

This brief defines a new type of multiple-input multiple-output (MIMO) amplifier. We present basic structures for this MIMO series–series feedback amplifier (MIMO-SSFA), and the basic design equations. We provide a detailed example showing how this MIMO-SSFA may be used as a transmitting circuit for multiconductor interconnections.

Tick-borne encephalitis virus (TBEV) is one of the most prevalent and medically important tick-borne arboviruses in Eurasia. There are overlapping foci of two flaviviruses: TBEV and Omsk hemorrhagic fever virus (OHFV) in Russia. Inactivated vaccines exist only against TBE. There are no antiviral drugs for treatment of both diseases. Optimal animal models are necessary to study efficacy of novel...

background road traffic accidents and their related deaths have become a major concern, particularly in developing countries. iran has adopted a series of policies and interventions to control the high number of accidents occurring over the past few years. in this study we used a time series model to understand the trend of accidents, and ascertain the viability of applying arima models on data...

sulfur dioxide has two important sources in the atmosphere and this is why most of scientists believe in a geographic split in the globe. power plants, major emitter of so2, are located in north hemisphere such as in russia, china, canada and the usa. in south hemisphere, phytoplankton produces a massive amount of dimethyl sulfide (dms) and dimethyl disulfide (dmds). then these types of reduced...

in the management of river basins, prediction of river water quality is essential to maintain water quality within standard limits. this study performed a time-series analysis of the prediction of chlorine concentration and electrical conductivity time series data for the period of 1991-2005 from sefidrood river in northern iran. the seasonal prediction of chlorine and electrical conductivity t...

The present study is an attempt to compare the use of different forms of greeting speech acts presented in Iranian junior high school textbooks, i.e. Prospect series (I, II, III) and Four Corners series (1, 2, 3 and 4) which are quite popular in Iranian high schools and institutions. To this end, greeting forms in the language function and conversation sections of these two series were analyzed...

The present study is an attempt to compare the use of different forms of greeting speech acts presented in Iranian junior high school textbooks, i.e. Prospect series (I, II, III) and Four Corners series (1, 2, 3 and 4) which are quite popular in Iranian high schools and institutions. To this end, greeting forms in the language function and conversation sections of these two series were analyzed...