we study the history and recent developments in nonelementarymodel theory focusing on the framework of abstractelementary classes. we discuss the role of syntax and semanticsand the motivation to generalize first order model theory to nonelementaryframeworks and illuminate the study with concrete examplesof classes of models. this second part continues to study the question of catecoricitytrans...

introduction: in-service training of nurses plays an indispensable role in improving the quality of inpatient care. need to enhance the effectiveness of in-service training of nurses is an inevitable requirement. this study attempted to design a new optimal model for in-service training of nurses. methods: this qualitative study was conducted in two stages during 2015-2016. in the first stage, ...

in this paper we propose a simple non-parametric model for multiple crite-ria supplier selection problem. the proposed model does not generate a zeroweight for a certain criterion and ranks the suppliers without solving the modeln times (one linear programming (lp) for each supplier) and therefore allowsthe manager to get faster results. the methodology is illustrated using anexample.

introduction: it has been experienced that performance improvement and promotion of human resources as the most valuable assets of an organization has the most vital role in its success. the aim of this study was measuring impression of achieve (ability and skill, clarity, help, incentive, evaluation, validity, environment) model on functional promotion of staff. methods: it was a descriptive s...

background: cox proportional hazard (cph) model is the most widely used model for survival analysis. when there are unobserved/unmeasured individuals factor, then the results of the cox proportional hazard model may not be reliable. the purpose of this study was to compare the results of cph and frailty models in breast cancer (bc) patients. methods: a historical cohort study was carried out us...

The antioxidant properties of coumarin derivatives using the 2,2ˈ -diphenyl-1- picrylhydrazyl (DPPH) radical scavenging assay were investigated by the application of Quantitative Structure Activity Relationship (QSAR) studies. The molecular structures were optimized and submitted for the generation of quantum chemical and molecular descriptors. Genetic Function Algorithm (GFA) was employed in m...

To calculate and evaluate wave scattering and penetration of electromagnetic waves in different biological tissues it is necessary to use a realistic model of the human body, with all tissues resolved and separately assigned with appropriate electric/magnetic properties. We report the development of a realistic 3D whole-body human model that has been adapted for simulation in CST software, cont...

background : breast cancer is a complicated disease and has various clinical manifestations and prognosis. the aim of this study is to make a breast cancer model suitable for basic, preclinical and clinical studies. materials and methods: five virgin bulb/c mice aged 6 weeks and spontaneous murine mammary adenocarcinoma cells (mmac) were used. after anesthesia induction, 1-3 million of mmacs we...

abstract background: leachate produced by waste disposal sites can be contaminating groundwater. the contamination vulnerability and groundwater protection assessment has proved to be an effective tool for the delineation of protection zones in area affected by groundwater contamination. the main objective of the study is to evaluate aquifer pollution vulnerability in the new waste disposal sit...

background: healthcare authorities, in all around the world, are faced with resources limitations and limitless needs of citizens. therefore, optimal resources allocation, particularly in the health sector and emergency system, seems to be of great importance. the present study aimed to determine the optimality rate of patients' distribution to hospitals by emergency stations based on the trans...