the place of information in addressing market access and participation limitation, which hinders farmer’s welfare and poverty reduction efforts in many developing countries, cannot be over-emphasized. this study therefore examined the use of mobile phone in the marketing of food crops among farming households in rural south east, nigeria. a multi stage sampling procedures was used in the select...

BACKGROUND Adults infected with HIV have increased atherosclerosis potentially associated with both HIV and non-HIV associated factors. We characterized risk factors for atherosclerosis as measured by noninvasive vascular imaging. METHODS AND RESULTS We used B-mode ultrasound to examine levels and correlates of echogenicity and vessel wall thickness of the carotid artery intima-media complex ...

Right after its introduction, GSM security was reviewed in a mostly theoretical way, uncovering some major security issues. However, the costs and complexity of the required hardware prohibited most people from exploiting these weaknesses in practice and GSM became one of the most successful technologies ever introduced. However, there is an enormous amount of mobile enabled equipment out there...

Introduction: Over the last decade, exposure to non-ionizing electromagnetic waves due to base station antenna has increased. This in vivo study was planned for evaluating the effects of whole-body exposure to 950 MHz field of GSM mobile phone system on rat dentate gyrus long-term potentiation. Materials and Methods: 24 naive male Wistar rats (3 month old, 225|¡|25 g) were randomly divided in t...

Inter-cell cochannel interference (ICCI) is an inherent problem in all cellular systems due the necessity to reuse the same frequencies after a certain reuse distance. In GSM, the fact that the number of nearby cochannel interferers is relatively small leads to a high probability of a dominant interferer (DI). Hence, suppression of DI alone provides substantial capacity improvement for GSM. The...

An analytical and concise formula is derived for the fractional Fourier transform (FRT) of partially coherent beams that is based on the tensorial propagation formula of the cross-spectral density of partially coherent twisted anisotropic Gaussian-Schell-model (GSM) beams. The corresponding tensor ABCD law performing the FRT is obtained. The connections between the FRT formula and the generaliz...

This paper presents an outline on the need of equalization in case of GSM systems. The modulation scheme employed in GSM systems is GMSK, which is both power and spectrum efficient, but at the cost of increased intersymbol interference. The effect of inter-symbol interference is more severe in case of multipath fading channel. This obviates the need of near optimum equalization. In this paper f...

We introduce a novel mid-structure called the generalized swept mid-structure (GSM) of a closed polygonal shape, and a framework to compute it. The GSM contains both curve and surface elements and has consistent sheet-by-sheet topology, versus triangle-by-triangle topology produced by other mid-structure methods. To obtain this structure, a harmonic function, defined on the volume that is enclo...

Railway digital radio system, GSM-R, is a dedicated system for railway based on GSM system, which shoulders the demand of dedicated dispatching communication for railway. So it is extremely important to research the data transmission of GSM-R. In this paper, a data transmission method has been proposed, based on the actual measurement report of GSM-R and a prediction algorithm, in analyzing the...