33 research outputs found
Factors Contributing the Success of Agricultural Sector Entrepreneurs and Approaches to Support Them A Case Study of Zanjan Province
Considering the importance of entrepreneurship and entrepreneurs, it is essential to support them in all sectors, including agriculture. The purpose of this paper was to study the factors that contribute to the success of entrepreneurs in agricultural sector of Zanjan province and to provide solutions for supporting them. As an applied study, it was made in surveying method. The statistical universe consisted of agricultural entrepreneurs in Zanjan (N=94). Questionnaire was developed to collect the necessary data. The date was analyzed using SPSS/14. Based on the results more than 81 percent of entrepreneurs were households. The main effective factors in success of agricultural entrepreneurs were: self confidence, creativity and innovation, positive thinking and capability of opportunities. The results showed that respondents had poor knowledge of regard cooperation laws. Based on the results of the study, the most important solutions for encouraging entrepreneurship in agriculture are prevention of price infraction, rent seeking and bribery, and participation of entrepreneurs in economic processes
Loss of Excitation Detection in Doubly Fed Induction Generator by Voltage and Reactive Power Rate
The doubly fed induction generator (DFIG) is one of the most popular technologies used in wind power systems. With the growing use of DFIGs and increasing power system dependence on them in recent years, protecting of these generators against internal faults is more considered. Loss of excitation (LOE) event is among the most frequent failures in electric generators. However, LOE detection studies heretofore were usually confined to synchronous generators. Common LOE detection methods are based on impedance trajectory which makes the system slow and also prone to interpret a stable power swing (SPS) as a LOE fault. This paper suggests a new method to detect the LOE based on the measured variables from the DFIG terminal. In this combined method for LOE detection, the rate of change of both the terminal voltage and the output reactive power are utilized and for SPS detection, the fast Fourier transform (FFT) analysis of the output instantaneous active power has been used. The performance of the proposed method was evaluated using Matlab/Simulink interface for various power capacities and operating conditions. The results proved the method's quickness, simplicity and security
Effective factors on effectiveness of educational courses held in the agricultural cooperatives in Zanjan province
The aim of the current research is to survey the effective factors on effectiveness of educational courses held in agricultural cooperatives in Zanjan province in 2010-2011. the methodology of this stady is descriptive-correlation and questionnaire was used to collect information that had necessary validity and reliability(0.91). the statistic society of this study includes 165 individuals that are members of agricultural cooperative of zanjan which 116 individuals were collected by cluster random sampling method.Data was analyzed by the PSS(16). the result showed that there was positive and significant relationship between educational goalsŘŚeducational toolsŘŚeducators contents and the effectiveness of educational courses. Explicit statemen and newness of subjectsŘŚdistinguished aims of coursesŘŚsuitability of methods with contentŘŚpracticability of subjectŘŚalso the way that trainers behave traineesŘŚfamiliarity of trainees with effectiveness of courses in job growing are the most important factors on effectiveness of educational courses
Investigating Stockmen’s Intention and Behavior regarding Animal Welfare at Dairy Cooperative in Sirjan Township
The aim of this research was to investigate the stockmen’s intention and behavior toward animal welfare in Sirjan Township. The sample was selected through simple random sampling. A survey of stockmen’s (N= 144) was undertaken in Sirjan Township, Kerman province. The reliability and validity of the instrument were examined and approved, and then data was collected. The results of this study revealed that independent variables predicted nearly 0.46 and 0.39 variance of the stockmen’s intentions and behavior regarding animal welfare respectively. Moreover, outcome expectation was the most important variable in predicting the stockmen’s intentions and behavior regarding animal welfare. Finally, due to the positive effect of stockmen’s attitude on their intention, findings suggested that, by demonstrating educational films, using posters and visiting superlative dairy farms, it was possible to improve their attitude regarding their animal welfare. According to the impact of stockmen’s understanding of self-efficacy on achieving animal welfare, the study also suggested to simplify different aspects of animal welfare from perceptions of stockmen in order to see animal caring as easy. In this respect, Jihad-e-Keshavarzi organization and animal cooperation are two active institutes which can make this possible by providing different facilities and other possibilities for their members
Evaluation of the Genetic Variation of Non Coding Control Region of BK Virus Using Nested-PCR Sequencing Method in Renal Graft Patients
Background & aim: Polyomaviruses (BK) is a comprehensive infection with more than of 80% prevalence in the world. One of the most important reasons of BK virus nephropathy is in the renal transplant recipients and rejection of transplanted tissue between them. Non Coding region of this virus play a regulatory role in replication and amplification of the virus. The aim of this study was to evaluate the genetic patterns of this area in renal graft at Namazi Transplantation Center, Shiraz, Iran. Methods: In the present experimental study, 380 renal allograft serums were collected. DNAs of 129 eligible samples were extracted and evaluated using a virus genome. The presence of the virus was determined by qualitative and sequencing. Of these, 129 samples were tested for the presence of virus according to the condition study, using quantitative, qualitative genomic amplification and sequencing. Results: The study showed symptoms of nephropathy, 76 (58.9%) of them were males and 46 (35.7%) were females with the mean age 38.0±.089 years of age. In general, 46 patients (35.7%) percent) were positive for BK Polyomaviruses. After comparing the genomic sequence with applications of molecular they were categorized in three groups and then recorded in gene bank. Conclusion: About 35% of renal transplant recipients with high creatinine levels were positive for the presence of BK virus. Non-coding region of respondents in the sample survey revealed that among patients with the most common genotypes were rearranged the entire transplant patients were observed at this tranplant center. Examination of these sequences indicated that this rearrangments had a specific pattern, different from the standard strain of archaea type
Endothelial Nitric Oxide Synthase Gene T-786C Polymorphism in Renal Transplant Recipients
Background: Nitric oxide (NO) is a major mediator in vascular biology, regulating regional blood flow. NOand the enzymes required for its production contribute to ischemia-reperfusion injury. The T-786C functionalpolymorphism in the promoter region substantially reduces promoter activity of the endothelialnitric oxide synthase (eNOS) gene and compromises endothelial NO synthesis.Objective: To examine the association between T-786C (rs 2070744) single nucleotide polymorphism(SNP) in eNOS gene and the development of acute rejection in renal transplant patients.Methods: 60 renal transplant recipients (30 with episodes of acute rejection (ARs) and 30 without rejection(non-ARs)), between June 2008 and March 2010, were included in this study. The polymorphism wasdetermined by PCR-restriction fragment-length polymorphism analysis.Results: The distribution of the genotypes were TT/TC/CC 60%, 33.4%, 6.6%, and 43%, 46.7%, 13.3% inARs and non-ARs, respectively (p=0.28). The frequency of T-allele was 76.7% and 66.3%; and for C-allelewas 66.6% and 33.3% in ARs and non-ARs, respectively (p=0.09). There were no significant associationsbetween these polymorphisms and acute and chronic kidney allograft rejection.Conclusion: We could not detect any significant association between polymorphism in T-786C of eNOS geneand the development of acute rejection