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Search Results: 1 - 10 of 811 matches for " Ebrahim Paimozd "
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Effect of Hot Accumulative Roll Bonding Process on the Mechanical Properties of AA5083  [PDF]
Hassan Sheikh, Ebrahim Paimozd
Open Journal of Metal (OJMetal) , 2011, DOI: 10.4236/ojmetal.2011.11002
Abstract: In this work, accumulative roll bonding (ARB) process as a severe plastic deformation was applied on an AA5083 sheet up to 6 cycles at the temperature of 300℃ and at the strain rate of 50 s­‐1. The results of tensile tests show that the values of the yield stress and the ultimate tensile strength don't change considerably after 4 cycles. Also, transmission electron microscopy (TEM) micrograph confirmed that the microstructure has fine (sub) grains with the size of 200 nm - 400 nm.
A New Approach to Complex Bandpass Sigma Delta Modulator Design for GPS/Galileo Receiver  [PDF]
Nima Ahmadpoor, Ebrahim Farshidi
Circuits and Systems (CS) , 2012, DOI: 10.4236/cs.2012.31006
Abstract: In this paper, new complex band pass filter architecture for continuous time complex band pass sigma delta modulator is presented. In continuation of paper the modulator is designed for GPS and Galileo receiver. This modulator was simulated in standard 0.18 μm CMOS TSMC technology and has bandwidth of 2MHz and 4MHz for GPS and Galileo centered in 4.092 MHz. The dynamic range (DR) is 56.5/49 dB (GPS/Galileo) at sampling rate of 125 MHz. The modulator has power consumption of 4.1 mw with 3 V supply voltage.
Ochratoxin A in dried figs, raisings, apricots, dates on Iranian retail market  [PDF]
Ebrahim Rahimi, Amir Shakerian
Health (Health) , 2013, DOI: 10.4236/health.2013.512282
Abstract:

Ochratoxin A (OTA) is among the most important mycotoxins, and the International Agency for Research on Cancer (IARC) classifies it as possibly carcinogenic to humans (group 2B). A total of 121 samples of dried fruits from the central zone of Iran were analyzed for OTA by enzyme linked immunosorbent assay (ELISA) technique. The recovery percentages of OTA in spiked dried fruit samples at concentrations of 5, 10 and 20 ng/g were found to be 84.9%, 89.3% and 90.4% as mean, respectively. OTA was found in 20.7% of the analyzed samples by average concentration of 6.7 ± 3.9 ng/g. The incidence rates of OTA contamination in dried fig, raising, apricots, and date samples were 10.4%, 44.7%, 6.7% and 10.0%, respectively. The concentrations of OTA in 7.9% of contaminated dried raising samples and 2.1% of dried fig samples were higher than maximum tolerance limit accepted by European Union (10 ng/g). This value reflects that the analyzed samples have a minimal contribution to toxicological risk. To our best knowledge, the present study is the first report of the presence of OTA by ELISA in dried fruit samples in Iran.

 

Determination Cadmium and Lead Pollution Resources of Ardabil Plain Underground Waters  [PDF]
Saba Hajjabbari, Ebrahim Fataei
Open Journal of Ecology (OJE) , 2016, DOI: 10.4236/oje.2016.69053
Abstract: Underground water is among the most important sources of drinking water. The aim of this study was to determine the concentrations of heavy metals (cadmium, lead) in providing plain of Ardabil in 2015. This study was cross-sectional, drinking water samples from 100 wells were prepared according to standard procedures. The dimensions of 350 × 350 meter grid station via a station in the network were determined by atomic absorption spectrometry AAS analysis of samples. The data obtained were analyzed using SPSS software. The average concentrations of lead, cadmium in groundwater wells in the area were also studied. The mean concentrations measured in the majority of groundwater wells in the plain of Ardabil lower than the allowed amount were designated according to a national standard.
Study on the Effects of Work Teams on Human Resources Excellence  [PDF]
Ebrahim Kalani, Ehsan Kamrani
Journal of Human Resource and Sustainability Studies (JHRSS) , 2017, DOI: 10.4236/jhrss.2017.51002
Abstract: The conception and use of work teams have been one of the main subjects of management researches for the last few decades and in the past years many developments have happened in the kinds and usage of them, which have improved the condition of organizations and human resources management. Our objective in this paper is to observe the formation of work teams and how they affect human resources excellence. Finding new and creative solutions for todays intricate situations is becoming more and more difficult and employees can’t solve them on their own anymore and this shows and bolds the importance of teamwork and forming work teams. The main objective however in this paper is to evaluate the effect of 5 main characteristics of work teams (which are team structure, leadership, control, mutual support and communication) on the 3 main characteristics of human resources excellence (which are delegation, motivation and team work) in Torang Darya Shipping Company. To do so, 200 personnel at the department were randomly selected from 450 personnel by Cochran sample size formula and answered to the research made questionnaire derived from[1][2] and[3]. The content validity of the questionnaire has been confirmed by the experts and academicians and the reliability has also been confirmed
Pathology of Barriers to Sharing Knowledge in Project Management and Ranking Them by AHP Method  [PDF]
Ebrahim Kalani, Ehsan Kamrani
Journal of Human Resource and Sustainability Studies (JHRSS) , 2017, DOI: 10.4236/jhrss.2017.51007
Abstract: Although knowledge management is a necessary part of strategic development of organizations, resources and improvement in competition, since it is always seen just as a temporary solution, most of related experiences have faced failure. Moreover since projects are mostly temporary and after they are done some of the main team members leave the company, this means the knowledge goes with them so this will cost future projects more money and time. In the present study we will try to find the main barriers for knowledge transmission and to rank them by statistical method of Analytic Hierarchy Process (AHP). In the end it comes to conclusion that despite the existence of the Project Management Body of Knowledge (PMBOK), it has been overlooked. The main barriers are the lack of organizational culture of preserving and sharing the knowledge and lack of trust and appreciation for using it throughout the company.
Effectiveness of the Combination of Solution-Focused Therapy and Narrative Therapy in Marital Adjustment among Incompatible Iranian Women  [PDF]
Azadeh Shirashiani, Ebrahim Namani
Open Journal of Psychiatry (OJPsych) , 2017, DOI: 10.4236/ojpsych.2017.72008
Abstract: The present study aims to examine the effectiveness of the combination of solution-focused therapy and narrative therapy in marital adjustment of incompatible women. This research is a pretest-posttest quasi-experimental study design with a nonequivalent control group. The statistical population comprises all the incompatible women who referred to the counseling clinics of Neyshabour in May 2016 (1500 admission per month). The research sample consists of 24 incompatible women who were selected through Randomand available sampling method. For data collection, Marital Adjustment Scale by Spinner was applied. The data were analyzed using the analysis of covariance test and with the aid of SPSS-22 software. The findings demonstrated that the combination of solution-focused therapy and narrative therapy is significantly effective in marital adjustment of incompatible women (P < 0.05). Thus, it can be stated that the combination of solution-focused therapy and narrative therapy can help to promote adjustment among incompatible women.
Statistical Control and Investigation of Capability of Process and Machine in Wire Cut Edm Process of Gas Turbine Blade Airfoil Tip  [PDF]
Ahmad Reza Fazeli, Ebrahim Sharifi
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.33030
Abstract: Statistical process control (spc), as one of the quality devices, can be help manufacturers improve the quality of their products in today’s competitive world. This research examines the statistical method of wire-cut electric discharge machining (WEDM) process of the turbine blade airfoil tip for control and consistency of the process. For this purpose, the standard deviation control chart, S, and the average data, , which are applied for identifying the acquired factors, have been used. Next, regarding the plan features, the manufacturing process is assessed to determine whether the products meet quality and the customer requirements or not. Therefore, the coefficients Cpk is applied which indicate the capability of the manufacturing process. Then, in order to produce high quality blades within the tolerance range, the capability of WEDM machine is examined, using coefficients CM. Finally, it is shown that in order to produce the desired product, the process can be controlled and fixed by using the statistical process control devices and inspecting the standard deviation of data and investigation of capability of process and machine.
Acute Cholecystitis Mimics Ischemic Cardiac Disease: A Case Report and Review of the Literature  [PDF]
Osman Habeeb, Taj Eldeen Ebrahim
Case Reports in Clinical Medicine (CRCM) , 2014, DOI: 10.4236/crcm.2014.311131
Abstract: Chest pain and shortness of breath are typical indicators of cardiac problem and may lead to life threatening conditions. Nevertheless, these symptoms may also be associated with a non-cardiac condition clinically such as cholecystitis. We have reported 4 cases in a period of 6 months wherein the patients presented with cardiac-like symptom show ever; they were subsequently diagnosed with non-cardiac problems. Two patients presented with severe chest pain and shortness of breath mimicking angina pectoris. They were admitted to the intensive care unit for emergency management. The ECG findings were normal. There were two other patients who also presented with severe chest pain and shortness of breath with ST segment elevation during the ECG examination. The abdominal ultrasound in all the 4 patients showed typical features of acute calculus cholecystitis. All patients were young (30 - 36 years of age) females who were obese (BMI ranging from 30 - 34). Cholecystectomy was performed which led to improved symptoms postoperatively and ECG changes became normal.
A Psychological Study on the Effectiveness of Marriage Enrichment Training through PAIRS Method in Marital Conflicts  [PDF]
Mahshid Alsadat Keyhandoost, Ebrahim Namani
Advances in Applied Sociology (AASoci) , 2017, DOI: 10.4236/aasoci.2017.74011
Abstract: This study aims to investigate the effectiveness of marriage enrichment training through PAIRS method in marital conflicts of married female students. The present research is an applied study in terms of purpose. Also, in terms of data collection method, it is a pretest-posttest quasi-experimental study with a nonequivalent control group. The statistical population comprised all married female students in Neyshabour Islamic Azad University, who participated in this study in the autumn of 2015. The sample was selected through purposive and available sampling method. From among the married couples, 30 married female students were chosen purposefully and were randomly assigned into two experimental (15 subjects) and control (15 subjects) groups. The data were collected through Marital Conflict Questionnaire by Sanaei (2000). The data were analyzed using the analysis of covariance test. The findings demonstrated that marriage enrichment training through the PAIRS method is effective in improving marital conflicts (P < 0.05). Based on the research findings, it can be concluded that marriage enrichment training through the PAIRS method can reduce marital conflicts in married female students.
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