in the current study the effect of casimir force and squeezed film damping on the pull-in instability and dynamic behavior of electrostatically actuated nano and micro electromechanical systems is investigated separately. linear elastic membrane theory is used to model the static and dynamic behavior of system for strip, annular and disk geometries. squeezed film damping effect is modeled using...

introduction: at the end of their education, nursing students have to acquire the minimum capabilities, essential for their professional job. the aim of this study was to determine the achievement of minimum learning requirements by midwifery students in school of nursing and midwifery of isfahan university of medical sciences. methods: a descriptive study as an educational evaluation based on ...

AIDS as an important health problem has been received more attention by social, political and health managers in the world. According to WHO education is the only way of fighting AIDS. Almost all educational interventions, lead to significant changes on Knowledge and attitudes toward AIDS by the subjects. Different methods have of course different influences. The present study is going to deter...

Over the past decade, many applications were intended for filtration by membrane technology especially the thin film composite (TFC) membranes. In advanced developments of thin film membranes, an attempt was made to spread a new generation of membranes called thin film nano composite (TFN) membranes. However, in the last generation of TFNs, an ultrathin selective film of nanoparticles is coated...

Background and Objectives: Kefiran (Kef) is a water-soluble polysaccharide that can form transparent film however, it is brittle. Therefore, in order to improve the mechanical properties of kefiran film, a mixture with other polymers can be offered. The expansion of mixed systems can propose kefiran and polyvinyl alcohol (PVOH) as a new composite film. Materials and Methods: Solutions of 20 gr...

Abstract: Different thickness of Cu2S thin films were prepared by vacuum evaporation under a pressure of 10-6 torr at an evaporation rate of 3Å /sec. Cu2S has direct band gap energy and indirect band gap energy at 1.2eV and 1.8 eV respectively. This paper presents the analysis of structural and optical properties of the Cu2S thin film by X-ray diffractometer (XRD) and UV-Vis-NIR Spectrophotomet...

The conducting polymer films have been widely applied in the field of electrochemistry owing to their goodstability, permselectivity, unique physical and chemical properties. A novel nano-Au/poly (4-aminobenzoicacid) (PABA) film modified carbon paste electrode was fabricated for sensitive detection of acetaminophenin this paper. The PABA film and nano-Au/PABA film were characterized by scanning...

  AIDS is a medical health phenomenon who’s social, cultural and economic dimensions are very widespread. Little information about this disease is emerging because of its recent development. Regarding the youth and adolescent, these are the groups most at risk of infection to AIDS, and the only means of controlling the disease is education and increasing knowledge. So, this study is aimed at co...

background tissue engineering is used for the treatment of many diseases, and the ideal cell source for cartilage tissue engineering is chondrocytes. the main limitation of chondrocyte is the low number of cells in cartilage tissue engineering. this study investigated a suitable cell source with high proliferation rate to obtain a large number of chondrocytes. methods adult cartilage tissue sam...