A singularly narrow 29 nm aerosol size standard based on the ΦX174 bacteriophage

A method based on the meshless approach for singularly perturbed differential-difference equations with Boundary layers

In this paper, an effective procedure based on coordinate stretching and radial basis functions (RBFs) collocation method is applied to solve singularly perturbed differential-difference equations with layer behavior. It is well known that if the boundary layer is very small, for good resolution of the numerical solution at least one of the collocation points must lie in the boundary layer. In ...

Genetically Determined Variation in Lysis Time Variance in the Bacteriophage φX174

Researchers in evolutionary genetics recently have recognized an exciting opportunity in decomposing beneficial mutations into their proximal, mechanistic determinants. The application of methods and concepts from molecular biology and life history theory to studies of lytic bacteriophages (phages) has allowed them to understand how natural selection sees mutations influencing life history. Thi...

Designing a Comprehensive Human Resources Model Based on ISO34000 Standard

The aim of this study is to present a comprehensive human resources model based on ISO34000 standard at Khorasan Razavi Electricity Distribution Company. This study is mixed, sequential exploratory, and applied. The qualitative population was the experienced and scientific experts. The quantitative population was 153 managers, deputies and experts responsible for the electricity company selecte...

the role of task-based techniques on the acquisition of english language structures by the intermediate efl students

this study examines the effetivenss of task-based activities in helping students learn english language structures for a better communication. initially, a michigan test was administered to the two groups of 52 students majoring in english at the allameh ghotb -e- ravandi university to ensure their homogeneity. the students scores on the grammar part of this test were also regarded as their pre...

On the modeling of narrow gaps using the standard BEM