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Considering EFL teachers’ identities and emotions as discursive practices through a post-structuralist lens offered by the concept of navigation of emotions, this study sought to explore EFL teachers’ emotional experience in online classes during online education to examine the way their emotional navigation helped them negotiate their identities. The participants, including 17 Iranian EFL teachers, working at universities in the West, North, and East of Iran, were chosen using purposeful sampling. To generate data, in-depth interviews and personal documents were used, which were analyzed using inductive thematic analysis. The participants spoke of the experience of mixed emotions, creating the sense of ambivalence, which offered the possibility of dialectic thinking for reconciling contradictory views and questioning the existing dominant and preconceived ideas. Moreover, they navigated their emotions through emotional reflexivity and positive reframing. While emotional reflexivity, as a process of self-confrontation, consisted of relational struggles and agency, reframing, as an example of deep acting, entailed emotional resonance or a sense of aliveness and connectivity as well as a possibility for stressing the transpersonal attachment, as a novel concept to be addressed in teaching English. The role of positive emotions in enriching language learning processes, which is mainly ignored in language education, was underscored because the cultivation of positive emotions in English language learners increases their intrinsic motivation, enhances their engagement, and creates a sense of belonging to the target language.

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In this study, gelatin was first extracted by alkaline and acidic treatment including 0.19 N NaOH and 0.12 N acetic acid solution by ratio of skin of rainbow trout (Oncorhynchus mykiss (to solution of 1 to 7 and then heat treatment in 50 °C. Then, hydrolysed by alcalase enzyme for 4 hours with the ratio of enzyme to the substrate 1 to 100 and the degree of hydrolysis were measured after 4 hours. DPPH and ABTS free radical scavenging activity, as well as reducing power assay of gelatin hydrolysate were measured. The results showed that the degree of hydrolysis after 4 hours was 46/7%. Also the highest DPPH and ABTS free radical scavenging and reducing power at concentration of 10 mg/ml were 39/8%, 50/7%, and 0/123, respectively. The skin from fish filleting can be a suitable raw material for extraction of peptides with biological activities. The results showed that peptides derived from rainbow trout fish skin gelatin can be considered as a natural antioxidant.

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Abstract In the present work, investigation on flow boiling heat transfer of R-134a inside a horizontal tube and also the tubes with coiled wire inserts has been done experimentally. The experimental setup which was used in this investigation was a well instrumented vapor compression refrigeration system. This set-up consists a test evaporator which all the experiments were carried out on it. Refrigerant which flows inside the tube of test evaporator is electrically heated by the coils around it. The evaporator tube is a copper tube with 7.5 mm internal diameter. The range of some operating parameters are: refrigerant mass velocities 54-136 kg/m2s, vapor qualities 0.2-1.0 and heat fluxes 2-6 kW/m2. The empirical data were collected for plain tube and tubes with seven different coiled wire inserts (different coil pitches and different wire diameters). The results show that the insertion of a helically coiled wire inside the evaporator tube increases the heat transfer coefficient by as much as 83% above the plain tube values on a nominal area basis. An empirical correlation was developed to predict the heat transfer coefficient during flow boiling of R-134a inside horizontal coiled wire inserted tubes.

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Converting feedstock into biochar is a popular approach to overcome the disposal problem, yet the role of waste type and pyrolysis temperature on biochar properties is not understood well. In this study, biochars were produced from various feedstock such as tea waste, apple wood, wheat straw and walnut shell at 300, 400, 500 and 600°C with 1-hour residence time. The results showed that increase in pyrolysis temperature significantly decreased biochar mass yield. The maximum and minimum mass yields were observed in walnut shell at 300˚C and apple-wood-derived biochars at 600˚C by 69 and 20%, respectively. The produced biochar had pH range between 5.3 to 9.7, and its pH value and ash content increased significantly with increasing pyrolysis temperature, except for walnut shell. Total concentrations of P, Ca, K, Na, Fe, Zn, Cu, and Mn and available concentrations of K, Ca, Mg, and P increased with pyrolysis temperature increasing in all samples, except at walnut shell-derived biochar. According to CHN analysis, by increasing pyrolysis temperature, the total carbon concentration increased but total nitrogen and hydrogen concentrations decreased. The pH value decreased with time until 72 hours, beyond which a near steady-state condition was attained. Relationships between pH and CaCO₃-eq content of biochars were close and linear. The FT-IR spectra showed that aromatic C increased by increment in heating. Also, by increasing pyrolysis temperature, the mean pore diameter decreased but micropores volume increased and led to increase in the specific surface area of biochars. The results of this study suggest that biochars produced at 300 and 400˚C may have potential as fertilizer in calcareous soils because of low pH and EC, with high mass yield.
 

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Winter sports tourism is a key economic factor in many mountainous regions worldwide. This type of tourism is considered to be one of the most important and profitable that has become more popular in recent years. Ski resorts in the present era have become one of the areas of tourism planning and management.In other words, this kind of tourism has helped create local businesses due to its many enthusiasts and has turned into a strategy for economic growth and development. Iran's Ardabil province is in a relatively good position in terms of winter sports and mineral waters attractions. The authorities need to use these potentials for developing winter sports.The aim of this study is to measure sports tourism developmentwith recreational complex and ski resort of Alvaras Sarein from the perspective of tourists.
Methodology
The statistical population of this study is sports and non-sports tourists who traveled to the area at least once, as well as tourism and sportsexperts in the province of Ardebil. Due to the limited statistical population, Morgan Table was used to determine the sample size. A total of 380 questionnaires were distributed in which 318 questionnaires were approved and were collected for analysis. The data collection method was library and a researcher-made questionnaire. In order to determine the validity of the questionnaire, the views of professors and experts in the field of tourism and sportswere taken. To determine the reliability of the questionnaire, Cronbach's alpha coefficient was used. In order to analyze the data and research objectives, structural analysis equations for measuring variables were used in the smart pls software environment. In this research, effective variables for the development of sport tourism in the Alvares ski resort included infrastructure, environmental, sports factors and management factors, each of which includes a group of indices.
 
Results and Discussion
The results of load factor analysis show that all of the indices are well explained by the research structure. Indices related to the use of modern technologies (0.809), the existence of clubs and provincial league (0.801), cultural programs and native festivals in sports events (0.818), variety of products and sports activities (0.838) and the presence of a guide and translator on site (0.814) have had the most explanatory power in the structure. Whereas distance indices from the airport (496/0), safety (511/0), signs and indications for guidance (561/0), locker room and storage and heating system (591/0), distance to the ski resort (527/0). Facilities and equipment intended for the disabled (0.508), wind speed in the region (0.551), natural landscapes (0.772), rivers and hot springs (0.483),the climate of the region (0.580), cleanliness from the point of view of waste accumulation (0.548), distance to centers (0.592), booths and commercial stores (0.881), vegetation and green spaces (536/0), the presence of sports shops (516/0), travel agency services (0/510), staff specialization and performance (0.566), the overall level of prices (0.7766) and security (0.445) have the least power of structural explanation. Also, the results of their path coefficient showed that there is a causal relationship between variables of the research. The intensity of this relationship between the infrastructure variable and the variable of sport tourism development (0.446) is more than other variables. T-value was used to measure the relationship between the variables. The results show that there is a significant relationship between infrastructure factors and the variable of sport tourism development at the 95% and 99% confidence level. The amount of the T-value between the two variables of sports factors and sport tourism development is (1.85), which shows that at 90% confidence level, there is a significant relationship between the two The amount of T-value between environmental factors and sport tourism development is (4.40), which shows a significant relationship between the two at 95% and 99% confidence level. Also, T-value between managerial factors and development of sport tourism is (3.74) which show a significant relationship at a confidence level of 95% and 99%, respectively.
 
Conclusion
The results obtained through the analysis of structural equations show that all indicatorsmeasuring the variables well explained the research structure and the indices related to the use of new technologies (0.809), the existence of clubs and provincial league (0.801), cultural programs and festivals, the native sporting events (0.818), the variety of products and activities (0.838), and the presence of local guidance and translator (0.814) had the most explanatory power in the structure. The path coefficients of the research variables indicate a direct causal relationship between the variables of research and the intensity of this relationship between the infrastructure variable and the variable of sport tourism development (0.446) is more than other variables. The fitting of measurement, structural and general models also confirms the conceptual model of research.