OALib Journal期刊

ISSN: 2333-9721



匹配条件: “Behzad Imani” ,找到相关结果约475条。
The Effect of Quality Circles on Nurses Job Satisfaction Working Emergency Medical Service
Arezo Karampurian,Reza Hossein abadi,Behzad Imani
Pajouhan Scientific Journal , 2012,
Abstract: Introduction: Quality circle are considered an important approach to improving behavior, increasing motivation, and reducing stress. The aim of this study was to determining the effect of training and applying quality control circles on the nurses’ level of occupation satisfaction.Material and Methods: This research is a two-group quasi-experimental study that after selection of two EMS stations, by simple randomization method 25 nurses worked in central station of Hamden emergency medical service were chosen as the quality circle group and 16 nurses of central station of Malayer emergency medical service formed the control group. The tools was used in this research was the occupation satisfaction questionnaire that was made on Herzburg Two factor theory. After training and performing of quality circle in trial group the occupation satisfaction test was carried out on both groups to get the change taken place in their level of job satisfactions. Then statistical analysis was performed using SPSS.Results: The analysis of data showed that before and after intervention there was significant differences in scores of health (P<0.001) and motivation factors (P<0.001) and also in global scores of occupation satisfaction in quality circle group (P<0.001), but there was no significant differences before and after intervention in scores of health (P=0.069) and motivation factors (P=0.094) and also in global scores of occupation satisfaction in control group (P=0.495). After intervention, the analysis of data showed significant differences in scores motivation factors (P=0.001) and global scores of occupation satisfaction (P=0.003) whereas there was no significant differences in scores of health factors between two groups (P=0.089).Conclusion: This study confirmed the effectiveness of training and applying quality circle in improving EMS nurses job satisfaction and offered as management method for use by EMS managers.
Stabilization students' awareness based on training classes in EMS
Arezo Karampourian,Nahid Mohamadi,Behzad Imani,Saeid Dashti
Pajouhan Scientific Journal , 2013,
Abstract: Introduction: The professional ethics in the medical field is an important concept. Understanding of EMS with professional ethic provide better services and to minimum professional stress. The group discussion method in the teaching of professional ethics is efficiency. The authors benefited of the method to evaluate the awareness of the ethical issues based on training classes.Material and Methods: The study was Cross - sectional. The study population included all of the students of EMS in the final year. Number of samples was 30 and method of sampling was the census method. After of expression course plan pre test was taken and after the end of class final examination was taken. Rate of knowledge of student was assessed after 3 semesters and data obtained were analyzed by software SPSS 16.Results: Rate of knowledge of students before teaching were 97% weak and 3% moderate. The scores of Students was between 20-14 and the mean of was 16.58. Results after 3 terms were this: The average student score 24/69, most samples (80%) have a high awareness and 20% had poor knowledge.Conclusion: The ministry of health policy is edification prior knowledge. The students' awareness of duty was high (80%), in the legal field was very weak and in some areas, such as respect, altruism was moderate.
A New Family of Nonlinear Fifth-Order Solvers for Finding Simple Roots  [PDF]
Behzad Ghanbari
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.36088
Abstract: In this paper, we present a new family of iterative methods for solving nonlinear equations. It is proved that the order of convergence of this family is five. Two functions and two derivative evaluations should be computed per iteration. To demonstrate convergence properties of the proposed family of methods, some numerical examples are given. Further numerical comparisons are made with several other existing fifth-order methods.
Training Based Channel Estimation in MIMO-OFDM Systems  [PDF]
Maryam Imani, Hamidreza Bakhshi
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.41008
Abstract: OFDM combined with the MIMO technique has become a core and attractive technology in future wireless communication systems and can be used to both improve capacity and quality of mobile wireless systems. Accurate and efficient channel estimation plays a key role in MIMO-OFDM communication systems, which is typically realized by using pilot or training sequences by virtue of low complexity and considerable performance. In this paper, we discuss some methods for channel estimation based training symbols in MIMO-OFDM systems. The results confirm the superiority of the represented methods over the existing ones in terms of bandwidth efficiency and estimation error.
The Tight Bound for the Number of Pilots in Channel Estimation for OFDM Systems  [PDF]
Maryam Imani, Hamidreza Bakhshi
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.42019
Abstract: Coherent detection in OFDM systems requires accurate channel state information (CSI) at the receiver. Channel estimation based on pilot-symbol-assisted transmissions provides a reliable way to obtain CSI. Use of pilot symbols for channel estimation, introduces overhead and it is desirable to keep the number of pilot symbols as minimum as possible. This paper introduces a new tight bound for the number of pilots in channel estimation using adaptive scheme in OFDM systems. We calculate the minimum number of necessary pilots using two approaches. The first approach for the number of pilots is obtained based on Doppler frequency shift estimation and the second approach is acquired based on channel length estimation using second order statistics of received signal. Finally we obtain the tight bound for the number of pilots using attained values.
Comparison of Correlation Dimension and Fractal Dimension in Estimating BIS index  [PDF]
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.21010
Abstract: This paper compares the correlation dimension (D2) and Higuchi fractal dimension (HFD) approaches in estimating BIS index based on of electroencephalogram (EEG). The single-channel EEG data was captured in both ICU and operating room and different anesthetic drugs, including propofol and isoflurane were used. For better analysis, application of adaptive segmentation on EEG signal for estimating BIS index is evaluated and compared to fixed segmentation. Prediction probability (PK) is used as a measure of correlation between the predictors and BIS index to evaluate the proposed methods. The results show the ability of these algorithms (specifically HFD algorithm) in predicting BIS index. Also, evolving fixed and adaptive windowing methods for segmentation of EEG reveals no meaningful difference in estimating BIS index.
A New Analytical Approach for Solving Nonlinear Boundary Value Problems in Finite Domains  [PDF]
Jafar Biazar, Behzad Ghanbari
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.28136
Abstract: Based on the homotopy analysis method (HAM), we propose an analytical approach for solving the following type of nonlinear boundary value problems in finite domain. In framework of HAM a convenient way to adjust and control the convergence region and rate of convergence of the obtained series solutions, by defining the so-called control parameter h , is provided. This paper aims to propose an efficient way of finding the proper values of h.Such values of parameter can be determined at the any order of approximations of HAM series solutions by solving of a nonlinear polynomial equation. Some examples of nonlinear initial value problems in finite domain are used to illustrate the validity of the proposed approach. Numerical results confirm that obtained series solutions agree very well with the exact solutions.
Investigation of Crystallization and Microstructure of Na2O-CaO-P2O5-SiO2-Al2O3 Bio Glass Ceramic System  [PDF]
Bahman Mirhadia, Behzad Mehdikhanib
New Journal of Glass and Ceramics (NJGC) , 2012, DOI: 10.4236/njgc.2012.21001
Abstract: The effects of Al2O3 on the crystallization behavior of glass compositions in the Na2O-CaO-P2O5-SiO2 system were investigated by differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). In this system, thermal parameters of glasses were studied by DTA. The density of the glass ceramic samples was measured by Archimedes’ method. It was found that the glass-ceramic containing 2.0 molar percent Al2O3 had desirable sintering behavior and reached to an acceptable density. Phase investigation and micro structural study were performed by XRD and SEM, respectively.
Monitoring Instrumentation in Underground Structures  [PDF]
Alireza Maghsoudi, Behzad Kalantari
Open Journal of Civil Engineering (OJCE) , 2014, DOI: 10.4236/ojce.2014.42012

Nowadays underground structures are very important. Based on observations of engineering; properties during geotechnical construction are an integral part of the design of underground structures. This research presents instrumentation as a tool to assist with these measurement observations, determine the need for modifications to loading or support arrangement. Also apart from above construction control, instrumentation is also indispensable for site investigation, design verification and safety of the structure. Instrumentation used in the construction of tunnels and subways can be implemented in three stagesbefore, during operation and during operation are examined. Metro Railway Tunnels are constructed in populated area and have a more comprehensive instrumentation and monitoring program that additionally includes monitoring of ground conditions, underground water levels, tilt and settlement of nearby buildings or other structures of interest in the vicinity of the tunnel alignment. Instrumentation monitoring for metro railway tunnels includes monitoring of the structures under construction together with the ground, buildings and other facilities within the predicted zone of influence. Furthermore, instrumentation and subway tunnels in and around them increase accuracy of the different layers of the earth and excavation of the surrounding structures and make safety and accuracy. This paper presents the features of sophisticated instrumentation available today for geotechnical monitoring. A wide range of sophistic have been described with their applications ted electronic and mechanical instrumentation with different instrumentation schemes used to meet the requirements of different types of structures.

Determining and Mapping Soil Erodibility Factor (Case Study: Yamchi Watershed in Northwest of Iran)  [PDF]
Rasool Imani, Hoda Ghasemieh, Mohammad Mirzavand
Open Journal of Soil Science (OJSS) , 2014, DOI: 10.4236/ojss.2014.45020

Among Universal Soil Erosion Equation (USLE) factors (R, K, L, S and P), Soil Erodibility Factor (K) is one of the most important and key factors which determines soil particles resistance to be detachment by water erosion (rainfall and/or runoff) forces. In fact, K factor is the rate of soil loss per rainfall erosion index unit and affected by 6 parameters including soil primary particles (silt, sand and clay), organic matter content and also permeability and structure of soil. The USLE nomograph is one of the most rapid and common methods for calculating K factor based on mentioned parameters. In this study, 38 samples of surface soil (0 - 15 cm) were collected from Yamchi watershed and the percentage of silt, sand, clay and organic matter content were determined in soil laboratory. Also textures of soil samples were determined to choice soil permeability and structure class codes based on United States Department of Agriculture (USDA) published information. Using USLE nomograph equation, K factor was calculated for each soil sample and based on kriging interpolation method, soil erodibility factor (K) map was constructed for entire study area which average soil erodibility factor and average standard error of interpolated map were 0.442 and 0.0076 t·ha·h·ha-1·Mj-1·mm-1, respectively.


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