MOTIVATION This paper studies the problem of discovering subsequences, known as motifs, that are common to a given collection of related biosequences, by proposing a greedy algorithm for learning a mixture of motifs model through likelihood maximization. The approach adds sequentially a new motif to a mixture model by performing a combined scheme of global and local search for appropriately ini...

Many advanced software tools fail to reach a wide audience because they require specialized hardware, installation expertise, or an abundance of CPU cycles. The worldwide web offers a new opportunity for distributing such systems. One such program, MEME, discovers repeated patterns, called motifs, in sets of DNA or protein sequences. This tool is now available to biologists over the worldwide w...

Aim: Scheduled breast ultrasounds are stressful procedures for women. We aimed to study the effect of informing patients during ultrasound and investigate associated anxiety pain alterations.
 Material Methods: After approval state hospital ethics committee informed consent, women scheduled between November 2022 March 2023 were prospectively enrolled in this randomized controlled study. Pa...

  Background :Respiratory viruses are the leading cause of respiratory tract infections among children and are responsible for causing morbidity and mortality worldwide. This study was performed to detect viruses in children with respiratory infections and describe their epidemiology and clinical characteristics.   Methods : In this descriptive cross sectional study, throat swabs and wash speci...

Avian influenza viruses (AIV) affect a wide range of birds and mammals, cause severe economic damage to the poultry industry, and pose a serious threat to humans. Highly pathogenic avian influenza viruses (HPAI) H5N1 were first identified in Southeast Asia in 1996 and spread to four continents over the following years. The viruses have caused high mortality in chickens and various bird species ...

objective: survey of molecular characterization of nucleoprotein gene of h9n2 avian influenza viruses and determination of the genetic relationship of iranian h9n2 viruses and other asian viruses. materials and methods: the nucleoprotein (np) genes from 4 isolates of h9n2 viruses isolated from commercial chickens in iran during 2008-2009 were amplified by rt-pcr method and sequenced. nucleotid...