introduction: this study was conducted to determine the most important strengths and weaknesses of the present evaluation system in tehran university of medical sciences and achieve the main factors to improve this system. method: it was a mixed method study design in two separate and sequential phases. the first phase was a qualitative step applying a document analysis method to interpret the ...

Background The critical role that the board plays in governance of universities clarifies the necessity of evaluating its performance. This study was aimed to evaluate the performance of the boards of medical universities and provide solutions to enhance its performance.   Methods The first phase of present study was a qualitative research in which data were collected through face-to-face semi-...

spectrometric techniques for the analysis of trace lead have developed rapidly due to the increasing need for accurate measurements at extremely low levels of this element in diverse matrices. this review covers separation and preconcentration procedures, and considers the features of the application with several spectrometric techniques. the use of an appropriate sample handling technique is a...

in this article, vehicle cornering stability and brake stabilization via bifurcation analysis has been investigated. in order to extract the governing equations of motion, a nonlinear four-wheeled vehicle model with two degrees of freedom has been developed. using the continuation software package matcont a stability analysis based on phase plane analysis and bifurcation of equilibrium is perfo...

weight-gain and potency enhancing drugs are the most popular herbal products in iran which are easily available via the internet and through illegal markets. the content of some of these popularly purchased products were investigated for the presence of illegal substance like phosphodiesterase inhibitors (pdh-5) and corticosteroids by hplc method. for this study, ten samples of both kind of her...

Scanning Impedance Microscopy (SIM) is one of the novel scanning probe microscopy (SPM) techniques, which has been developed to taking image from sample surface, providing quantitative information with high lateral resolution on the interface capacitance, and investigating the local capacitance–voltage (C–V) behavior of the interface and AC transport properties. The SIM is an ordinary AFM equip...