Co-operative communication using relays can achieve spatial diversity, which improves the link quality in a wireless network. In this paper, the performance of an infrastructure based multi-antenna adaptive decode-and-forward cooperative relay network in presence of a m-Nakagami fading channel using Low Density Parity check (LDPC) code has been investigated. The bit error probability (BER) and ...

Video servers are high@ vulnerable to disk failures because they employ large-scale disk arra.vs to support many clients and multimedia contents. To cope with such a structural weakness, they reserve a significant portion of their resource contingent on disk operability, leading to its under-utilization in normal operation mode. This paper addresses the improvement of resource utilization in fa...

The aim of the present study was to estimate the genetic parameters and genetic trends of somatic cell score (SCS) in the first 3 lactations of Iranian Holstein cows by random regression (RR) animal model by using Restricted Maximum Likelihood (REML) method. The data set used in this analysis included observations of 340318 test-day records of 41526 cows in 288 herds; 89969 test-day of 11750 co...

We present an approach to design of fault tolerant computing systems. In this paper, a technique is employed that enable the combination of several codes, in order to obtain flexibility in the design of error correcting codes. Code combining techniques are very effective, which one of these codes are turbo codes. The Algorithm-based fault tolerance techniques that to detect errors rely on the c...

Temporal variations in the frequency of multiple maternities in many Western European countries have been described. However, within a single country, regional differences are observed. Urban industrialized regions and rural agricultural areas have experienced in recent decades a distinct decline in multiple deliveries, which in cases have been related to maternal age and parity changes. Resear...

Due to the popularity of LDPC (Low Density Parity Codes) in modern communication systems, there is a growing need of LDPC encoder with a faster encoding speed and more application compatibility. In this paper, an efficient QC-LDPC encoder architecture is proposed, which is suitable for both IEEE 802.16e standard and IEEE 802.11n standard. Owing to the special structure of multi-diagonal parity ...

SLC/SLD provides the ideal experimental environment to directly measure the parity violation parameters at the Zbb, Zcc vertex decays. Three di erent analysis techniques exploit the multi-purpose detector capabilities and are brie y described; the updated result obtained with the semileptonic decay method is presented. Presented at the 28th International Conference on High Energy Physics Warsaw...