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Volunteers are an organization's most complete human resource to hold a successful sporting event. Maintaining a volunteer workforce and motivating volunteers to continue their activities is one of the most important tasks of sporting event managers. This study aimed to investigate how volunteers' involvement in the 14th Sports Olympiad for University Students in Iran affected their behavior. For this purpose, 157 volunteers present at the 14th Sports Olympiad for University Students in Iran were randomly selected as the research sample. Researchers collected data using the Zitsmal et al. (1996) Modified Scale of Behavioral Intentions, Doherty's community involvement scale (2009), and Zaichkowsky's Event Involvement Questionnaire (1994). In order to test the hypotheses, structural equation modeling was used. The results showed that the measurement model has appropriate internal consistency, convergent validity and Discriminant validity. It was confirmed that all variables used in the study were accurate. In the structural model results, the index for determining the coefficient of behavioral intentions was 0.44. Showed that social participation and event participation had a moderate and positive correlation with each other (0.40), and community involvement and event involvement, respectively, with path coefficients of 0.45 and 0.34, had an effect on behavioral intentions, so it can be concluded that understanding the psychological and behavioral aspects of volunteers, such as types of involvement, helps sports organizations in attracting volunteers. In this way, they can maximize the willingness of volunteers to involvement in the future.

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The purpose of this study was to compare various direct techniques of measuring attitudes toward risk. The Equally Likely Certainty Equivalent with a Purely Hypothetical Risky prospect (ELCE-PH), The Equally Likely Certainty Equivalent with a Hypothetical but Realistic Risky prospect (ELCE-R) and Probability of Winning Demanded (PWD) models were used to elicit the risk attitude of a sample of farmers. These methods were then compared and evaluated. The criteria employed were (1) sample respondent capability in answering questions, (2) means and corresponding risk attitudes classification and (3) distribution of risk attitudes. According to the first criterion, the results showed PWD technique is the best one. While there are no differences among the three direct techniques on the basis of the second criterion. Also, the findings indicate that respondent education and age, family education, level of hypothetical income and a greater explanation by other people during interview have an influence on respondent capability in answering questions. These characteristics should therefore be considered when choosing the appropriate technique.

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Spotted Amber Ladybird, Hippodamia variegata (Goeze, 1777) (Coleoptera: Coccinellidae) is an important predator of aphids and some other insect pests. Since shape and size variation may affect biological characteristics of an insect, multivariate analysis of shape variations in four geographically isolated populations of H. variegata (Isfahan, Shahrekord, Shiraz, Yasuj) was performed based on eight landmarks of hind wing. According to the analysis, significant difference in weight matrices (as shape variable) was detected. The cluster analysis separated Isfahan population from other populations. According to ANOVA, we found significant difference in centroid size (as size variable), so that the two populations, Isfahan and Shahrekord, had larger wings than the two other populations. Distribution of 80 individuals based on partial warps on the relative warp axis placed Isfahan population in a separate group while the others had overlap and irregular distribution.  

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The fauna of the superfamily Bombylioidea was studied in Alborz province, Iran during 2012. Two families (Bombyliidae and Mythicomyiidae), eight genera and ten species were identified, of which two species, Exoprospora dispar Loew, 1869; Parageron lutescens (Bezzi, 1925), are new records for the Iranian fauna. An identification key for the species of the family Mythicomyiidae known from Iran is given.

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The objective of study was designing a structural model for organizational mindfulness: A mixed research. This study was an explanatory sequential design and ​​an applied research. In qualitative part, population were experts of management schools of public universities of Tehran, and sample were 14. In quantitative part, population were the management faculty members of management schools of public universities of Tehran (351 members), sample were 226 using two-stage cluster sampling and targeted available were implemented. Organizational mindfulness, professional learning community and transformational leadership questionnaires were distributed and gathered in 2014-2015. Analyses showed accepted reliability and validity. In qualitative part for collecting mindfulness indicators, content analysis and open coding were used. The quantitative statistical methods were exploratory and confirmatory factor analysis and structural equation modeling. The structural equation modeling contained one exogenous construct of transformational leadership; two endogenous constructs of professional learning community and organizational mindfulness. Results demonstrated transformational leadership had significant and direct effects on professional learning community and on organizational mindfulness. There is direct and significant effect of professional learning community on organizational mindfulness. Results also showed transformational leadership (idealized influence, inspirational motivation, individualized consideration) had direct effect on professional learning community (collective responsibility for learning, collaboration focused on professional learning). Transformational leadership also has direct and meaningful effect on organizational mindfulness (rapidity and agility, flexibility, accountability, conditional learning and development of recognition, trust and openness). Also professional learning community has direct effect on creation of organizational mindfulness.  

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Aims: Blastocystis is a common intestinal parasite among humans and various animals, including birds. The parasite has at least 28 known subtypes, of which nine subtypes have been reported in humans and livestock. The aim of this study was to determine the prevalence rate and common subtypes of Blastocystis hominis in pigeons and their owners in Tafresh city.
Materials & Methods: The present study was designed and conducted as a case control in Tafresh city (Markazi province) during 2020-2021. For this purpose, fecal samples were collected from pigeons (300 samples) and their owners (100 samples). Stool samples were studied by microscopic methods (direct and trichrome staining examinations). Then positive stool samples were examined by PCR method through amplification of 18 SrRNA gene and sequencing.
Findings: In direct stool examination, 39 (13%) out of 300 pigeon samples and 18 (18%) out of 100 human fecal samples were found to be positive for Blastocystis. In trichrome staining method, 18% of human samples and 15% of pigeon samples were positive, while in PCR test, only 2.5% of pigeon samples and 4.5% of human samples were Blastocystis positive. The alignment results showed that all Blastocystis strains isolated in this study (100%) were similar to subtype 3.
Conclusion: Due to the low prevalence rate of this parasite in pigeons in Tafresh city, their owners are less likely to be infected with this parasite. Therefore, the relative transmission risk of this parasite from pigeons to humans is low.

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Cry genes encoding Cry proteins toxic to Lepidoptera, Coleoptera and Diptera species were studied in thirty seven B. thuringiensis strains isolated from twelve naturally infested Heliothis armigera larvae. To further confirm the isolates, two groups of species-indicative biochemical tests were applied while discriminative biochemical tests being employed to figure out the repetitive strains. A PCR experiment was performed using five sets of universal primers for cry1, cry2, cry3, cry4, cry7/8 genes. All strains reacted appropriately, for B. thuringiensis, to the biochemical tests and while the reactions to the discriminative tests being varied. Based upon the results of the discriminative tests, twenty four non-repetitive strains were selected and employed in the PCR assay. Each of the selected strains presented one cry gene, at least; cry1 being the most frequently detected one (91.7%), followed by cry2 (87.6%), cry3 (50%) and cry4 (42%) but no isolate harbored a coleopteran-active cry7/8 gene. All the strains presented combinations of two or more cry genes: 20% presenting cry1+cry2, 12.5% cry1+cry3, 4% cry2+cry4, 20% cry1+cry2+cry3, 20% cry1+cry2+cry4, 4% cry1+cry3+cry4 and 12.5% carrying all the four cry genes studied and only one strain bearing a single cry gene. The cry1-cry2 combination was common in many strains (72.5%). Genetic characterization of this collection provides an opportunity for selection of strains with improved and multiple insecticidal toxicity.

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Thermal energy storing technologies are a new approach in reducing energy costs, managing demand side, pick shaving and increasing portion of renewable energies in energy production. In spite of lots of advantages of thermal energy storage techniques, there are still major challenges in the path of Latent heat thermal storages (LHTS). One of the challenges is the low charge and discharge rate of heat transfer in LHTS. In the current study charging rate of a shell and tube LHTS is numerically studied by enthalpy-porosity numerical technique. Exact positioning of the heat transfer tubes and thermal fins has great impact on the natural convection flows. In this study effect of increasing heat transfer tubes (HTF), lower positioning of tubes in four tubes configuration, changing upper tubes distance and using interconnected axial fins has been studied and compared to each other. Moreover, velocity and temperature contours have been analyzed. Results demonstrated that increasing number of tubes could not solve the slowing rate of charging at the end of process and tubes need to be positioned lower in the tube. In addition, it was observed that heat transfer axial fins can decelerate convection flows and develop stationary areas inside the shell. Prediction results revealed by lowering tubes and closing them to the shell wall, introduced in this article, it is possible to decrease charging time of 0.95 of storage capacity to one fourth of similar time in a one tube LHTS.

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           Electronic fund transaction refers to any transfer of funds in which electronic media are used in at least one of its processes. Depending on the type of transaction, the legal relation of the bank and consumer may constitute agency, cession of claim or loan contract. According to the UNCITRAL Legal Guide and the regulations of Iran and the United States, the obligations of bank against consumer are “Consequential Obligations”. The bank is liable for the losses arising from its systems, employees and other institutes cooperating with it. This comparative study discusses that Iran’s law has deficiencies in some aspects such as the moment of irrevocability of payment order. Also some of the provisions of model contracts, which are used in the banking system, are in conflict with the mandatory regulations of consumer protection, and should be modified.        
*Corresponding Author’s E-mail: abdolahi80@gmail.com    

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Oxidation of lipids in foods is one of the most important chemical events during food frying. The resulting chemical indices contribute to various diseases such as atherosclerosis, cancer, premature aging, respiratory distress syndrome and various liver disorders. The overall objective of this study was to investigate the chemical factors of the oils used in Fried falafels.
and then compared with the  case controlled conditions in the laboratory. This study was performed on 50 samples prepared in the shop. Peroxide, anisidine number, total oxidation value (TOTOX) and Kreis test were measured to investigate the destructive effect of falafel compounds on oil, then was compared with the case controlled samples according to the relevant standards in the laboratory. In this study, more than half of the samples could not be used and only 42% of the samples were approved. The mean and standard deviation for this values in the control sample were 4.39±0.62, 6.09±0.87 and 15.68±2.09 respectively. Also, there was a positive correlation between the values of peroxide, anisidine and TOTOX with Kreischr('39')s test. Based on the results, it was found that most of the chemical factors in the samples were above the permissible limit and used oils on the shops are unhealthy and unusable. Therefore, due to the dangers of primary and secondary oxidation on human health, implementation of training programs and application of the proper way to prepared food for the staff of these centers is essential.

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The ultrasound process is a non-thermal method of extraction, and due to its effective effects on food storage and processing its use is increasing. Therefore, the aim of current study was to investigate the effect of ultrasound waves on phenolic and flavonoid compounds extraction of lemon peel extract. In this method in order to evaluate the phenol and flavonoids extraction and to assess the inhibitory power of DPPH free radicals, three different water solvents, 70% ethanol and 80% methanol were used. Then, the best solvent for the extraction of these compounds at of 30, 60and 90 moments were compared. The software used for analysis of variance and comparison of means was SPSS. According to the results, the strongest and weakest solvent for the extraction of bioactive compounds were 70% ethanol and water, which was 8.202 and 6.95 mg, equal to Gallic acid per grams of dry extract of phenolic compounds, 4.61 and 3.74 mg equal to quercetin grams of compound flavonoids dry matter and 87.468 and 70.213 percent of the inhibitory power of DPPH-free radicals. In 70% ethanol solvent, a significant difference was observed between 30, 60 and 90 moments for extraction of effective compounds, and 90 and 30 minutes, respectively, had the highest and lowest extraction rates of the compounds, respectively. In each extraction method, the amount of extraction of bioactive compounds was different depending on the solvent and 70% ethanol solvent was the best extraction method.

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Fish is one of the most important and valuable sources of protein, fat and energy, but it is very corruptible and will be corrupted faster than other meat dishes. The present study was carried out to determine the effect of Spirulina  algae  chitosan  coating  on  maintaining  the  quality of  Huso  huso  fresh  fillet  during storage  in  refrigerator. Fresh fillets of chitosan solution (1%) containing 1% algae extract, treated and stored in a refrigerator. Microbial and chemical tests including total bacterial count and psychrophilic bacteria, pH, TBA as well as sensory evaluation were performed periodically for all specimens and measured for DPPH .eagla For algae - containing coatings, the total bacterial load was 2.56×10⁶ cfu/ml and on the fifth day it was still in acceptable range for human consumption, but in control samples, 3.81×10⁷ cfu/ml it was five days that exceeded the limit. Serum bacterial levels for control treatment were significantly higher than that of extract containing chitosan coatings and TBA values were significantly higher in the control fillets than in the first treatment, while the pH values in the control sample with the treated sample, there was no significant increase. Current study showed that using algae extract containing chitosan coating can prevent bacterial growth in fresh fish fillets and maintain its sensory properties including texture, smell, color and general acceptance. And increased the fish storage period in the refrigerator.
 

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In plasma cutting, a noble gas at high speed is blown from the nozzle and ionized with the help of a frequency spark at high voltage and an electric arc is created which cause the gas changes to the plasma state. Plasma cutting is an ideal process for cutting of the hard metals. In this research, the effect of the input parameters and their optimization in plasma cutting of AISI 309 stainless steel were studied. By conducting the different experimental tests, the effect of input parameters including amperage, gas pressure and the cutting speed of torch on the three output parameters of the width of cut (Kerf), heat-affected zone (HAZ) and surface roughness (Ra) were investigated. Analysis of the results showed that the amperage, cutting speed and gas pressure have the highest impact on the output parameters, respectively. The artificial neural network (ANN)-genetic algorithm was used to predict and optimize the output parameters. The results indicate that the artificial neural networks model trained by the genetic algorithm are able to predict the output parameters accurately. Finally, the optimization of output parameters to achieve the best cutting conditions was carried out using the genetic algorithm. The artificial neural network models were considered as the objective function and also, the parameters of the heat-affected zone, surface roughness, and the width of cut were introduced as inputs of the algorithm. According to results, a combination of the neural network and genetic algorithm is an efficient method for optimization of the plasma cutting process. This method can be easily modified and utilized for other advanced cutting methods.

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This study is aimed to determine individual, psychological and organizational factors contribution in predicting Karaj municipality staff competence. Research methodology is descriptive and correlational where population included all staff in municipality in the 2014-2015. For research sample 300 employees were selected using stratified sampling. Designed standard questionnaire included: a) creativeness, b) Haplin & Kraft organizational climate competency assessment cite, d) Spritzer & Mishra psychological empowerment, e) Salovi & Mayer emotional intelligence & f) job motivation. Cronbach alpha coefficient for reliability testing was suitable. Regression results showed that personal characteristics couldn't predict competency significantly, and just psychological empowerment & emotional intelligence could predict employee competency significantly & organizational characteristics could predict competency significantly.
One of the scientific offers obtained from this research is that the managers of Karaj municipality can increase the level of efficiency of their organization by increasing the level of employee’s competency based on the contribution and influencing each individual, psychological and organizational factors. Results of this research can use for improving employees competency.

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The changes in Root Length Density (RLD) of rainfed fig trees due to supplemental irrigation were studied during two growing seasons in Estahban, southern Iran, with objective of finding out the optimum position, time, and amount of supplemental irrigation. Irrigation position treatments were: (1) In a micro-catchment close to tree trunks; (2) Inside the tree canopies (1-1.1 m from tree trunks); and (3) Outside the tree canopies (2.1-2.2 m from tree trunks). Irrigation time treatments included: (a) In early spring and (b) In mid-summer; and the treatments of irrigation amount were: (i) No supplemental irrigation (control), (ii) 1,000, and (iii) 2,000 L per tree. Results showed that the highest RLD in different irrigation amounts occurred at 15-45 cm depth during late winter and late spring. However, during summers, the high RLD occurred 15 cm lower at 30-60 cm depth. Irrigation water treatments of 1,000 and 2,000 L per tree increased RLD values by 11.3 and 19.3%, respectively, in late spring and 10.5% and 14.7%, respectively, in late summer, compared with the rainfed treatment. Whereas this increase generally occurred in the wetted area; supplemental irrigation out of tree canopy could develop the root horizontal extension to a greater distance. Lower temporal variation in RLD profile was obtained for depths deeper than 75 cm, which was in agreement with soil water content variations. Supplemental irrigation applied out of tree canopy with 2,000 L per tree (200 m³ ha^-1) during early spring is recommended to improve root development of fig trees in drought prone rainfed areas.

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The article, by using historical texts, attempts to reconstruct part of the ups and downs of the Caspian Sea’s southern coastal history, the importance of navigation on the shores and ports of the Caspian Sea, and the impact of Nader Shah's policies on the formation and prosperity of navigation in northern Iran. Based on library resources and a thorough analysis of the contents, the article seeks to answer the following questions: 1. What were Nader Shah Afshar's motives and goals in establishing shipping in the Caspian Sea? 2. Why the Russian government was suspicious of this issue? The findings of the study indicate that Nader Shah intended to boost the commercial prosperity of the country by forming a navy in the Caspian Sea and also achieve his political and military goals which were in contrast to the interests of the Russian Tsarist government. Finally, the main purpose of this study is to examine the state of trade, navigation, and shipbuilding during the Nader Shah period, by using the historical approach and archaeological evidence of the shipwreck off the coast of Chamkhaleh in Langarud County which is undoubtedly closely related to the political-military presence of the government and social presence. Hence, the role and position of local rulers of the Caspian Sea coasts and how they interacted with the Afsharid dynasty and foreign companies are noteworthy.