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Otters at the top of the food chain and feeding largely on fish are likely to be especially vulnerable to the effects of bioaccumulating pollutants. This research reports the first data on mercury levels found in hairs of river otters (Lutra lutra) from Iran. Between June and December 2007, we collected museum and recent collections of river otter hair. These samples were collected from several provinces of three major regions of Iran. The mean of mercury concentration for all samples (recent and museum) was 5.819±1.557 mg/kg with 95% confidence interval for the mean. The concentrations of Total Hg (THg) in hair ranged from 0.293 to 12.382 mg/kg. No significant variation among the sample regions existed. A comparison of THg concentrations between two decades (1986-1996 and 1996-2006) showed that these differences were significant (p

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Citing the "Annual Report of Fragile States Index" provided by the "Peace Fund" from 2006 to 2023, this article argues that Libya was not an example of a failed state at the time of state collapse. Although all governments in the world have a degree of weakness and incapability in providing and realization of their main tasks, Libya's rank during Gaddafi period, compared to other countries, was not a rank that could be considered as an example of a fragile state. The necessity of reforming the produced literature provoked the writer to seek an answer to the question of why the post-Gaddafi government of Libya has moved towards a collapsed government. Prioritizing domestic reasons for this issue over regional and international ones, this article argues that; the government's inability in exclusive use of power; the political role of Islamists in Libyan government; the role of Libyan former officials in the new government; terrorist groups with an Islamist approach such as ISIS and Al-Qaeda; the role of Islam in the laws and political and social life of the country; disagreement over the types of political governmental   structure; disputes related to the electoral system; ways of allocating  the seats of the National Congress to the representatives and the methods of choosing a new body to draft the constitution, are the most important reasons why the Libyan government is moving towards a "collapsed state".

 

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Nostalgia or submit for the past is a mental state that appears in a person unconsciously and then becomes a thought. In the literature, this state occurs for a poet or writer, who, because of individual motivation or surrounding social, political situation, feels cut from the present time and raises the idea of returning to the past and its sweet memories. Abd -Al Wahhab Baiati and Mohammad Reza Shafie Kadkani, as two famous contemporary Arabic and Persian literature poets and gonfaloniers of the school of literary romanticism, refresh their memoirs according to their personal and social conditions; and their poem takes the color of pain, sorrow and yearning for the past and induces an atmosphere of submit and nostalgia to the audience. Therefore, in this research, the authors, using Hermeneutics approach and content analysis method, review and match the appearance manner of this poetic thought in these two poets' lyrics. The results showed that these two poets have subscription in nostalgic themes, staying away from land, childhood, lover, loss of values and myths.    

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The objectives for this study were first to understand and estimate energy consumption in each stage of production and processing of milk using regional data and second, suggesting improvement opportunities. A cradle to gate assessment of market milk was performed by separating the system into three stages: agronomy, animal farm and processing plant. Data were collected from multiple sources e.g. questionnaire, published papers, national and international databases, and the processing plant database. Throughout the study, ISO framework and International Dairy Federation guideline on life cycle assessment were used. The functional unit (FU) was one liter of pasteurized milk packaged in plastic pouch at the processing plant gate. The average energy demand for producing 1 kg of fat-protein corrected milk at farm-gate was 10.8 MJ, although for the final packaged milk, it was 12.5MJ. Main stages in overall energy use of FU were agronomy 68 %, animal farm 19 % and processing plant 13%. The average energy use for raw milk production was 2-5 times higher than previous European reports. To enhance efficiency in this sector, we need to assess other regions’ potentials for feed and milk production and then to focus on agronomy stage for lower energy use by optimization of irrigation, or even importing energy intensive feed such as barley and alfalfa from other countries.

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Among the most important lessons, as the most striking aspect of literature in any language and by which the main objectives of this field are met, are the courses related to the poetic texts. A great deal of Arabic language and literature is devoted to literary texts, among which much is devoted to the poetic texts. But for many years, the poetic texts are taught with traditional methods in this field and many of the teachers do not use new strategies in teaching of these texts. This has led the poetic texts not to be successful in reaching their main goals, meaning the improvement of literary talents of students and strengthening their desire and motivation to their field. This study tries to deal with the appropriate strategy performances in teaching Arabic poetic texts in Arabic language and literature useing survey and questionnaire methods. The population of this study includes the fourth and higher semester undergraduate students and Arabic language and literature field professors in the Universities of Tehran, Allame Tabatabaei, Beheshti and Tarbiat Moallem. The findings demonstrated that in many students’ and professors’ point of view, new strategies of teaching of poetic texts (i.e. semantic perception of poetry, aesthetic expression of verses and stylistic analysis) are performed less than the traditional strategies pertaining to correct reading of texts and expression of grammatical points.

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In all languages, grammar instruction is one of the most important concerns of language teaching connoisseurs. In Arabian language, due to its specific structural and instructional properties, grammar and its teaching procedure have been investigated by teachers and connoisseurs for decades. Similarly in Iran, Arabic grammar instruction has been one of the most important components of teaching this language forever; so many of famous connoisseurs and book authors in Arabic grammar are Iranian. However, nowadays, one of the most challenging fields in teaching Arabic in Iran is grammar instruction. Despite of instructing 20 units in B.A. Arabic language and literature, it seems that students are facing with paramount deficiencies in applying Arabic grammar since it is for long years that grammar is instructed with old methods and many professors are not using modern and proper. strategies. The present study attempts to study instructional methods and the rate of implementing proper strategies by a survey and questionnaires. The research findings showed that traditional deductive method is more frequently used in grammar instruction, and new strategies, namely technology and contributive application and strategy, are implemented less than traditional methods in providing feedback information.

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Dark nature and Contemporary Persian Poetry Dr. Fateme Kupa(Associated Professor in Payam’e Noor University-center of Tehran) Mohsen Esmaeili Abstract: One of the nature-oriented characteristics of contemporary Persian poetry is paying attention to nature aspects and the objective world, that is because of application of darkness, twilight spaces obscure, mysterious and frightening atmospheres which are associated with boredom, outrage, ruin, downfall and naught for readers . These kinds of images in this research are called “Dark nature”. To bring in “Dark nature” is the cause of philosophic, socio-political changes and designing new ideas in aesthetic and anthropology topics in two last centuries of Europe. In this article, first of all, the effects of all factors are examined, then how they emerged in persian poetry will be discussed . Keywords: Naturalism, Dynamic Organism, Beauty and Sublimity, Reification.

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. Dream is one of the most important elements of modern novel. In Derakht-e anjir-e ma’ābed, the only modern novel by Ahmad Mahmoud, this element plays a key role. At the beginning of the novel, Alamdar-e Avval, mentions his dreams and the Alamdar of the next generation narrates those dreams and finally the Alamdar of the third generation writes down those narrations. Alamdar’s dreams are obscure and complicated and challenge the reader. Besides, later in the book two dreams by Mard-e Digar and Sarmast-e Bakhtiari are narrated. The major dreams form the first chapter of the novel have not been studied analytically yet. This research offers an analysis of these dreams by summarizing the dream in the author’s own language and with the help of Freud’s method in the Interpretation of Dreams based on genetic structuralism according to which different parts of the novel find their meaning only in a general structure.

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Issues concerning syllable structure, as well as the arrangement and configuration of the phonological units inside a syllable or out of it (i.e. the border of two syllables), are basically discussed within the domain of phonology. This article tries to shed a new light on the issue of syllable structure and phonotactics, on the basis of data from Persian Language. Given the fact that the structure of syllable in Persian is (C)V(C)(C), the present article tries to show if there is any difference between the phonotactics of an individual syllable with that of the same syllable when combined with other syllables, and also tries to find out if there is a significant relationship between the phonotactics of words and their parts of speech. In order to do so, 4075 bisyllabic words with the syllable structure (C)V.CVC(C) were collected from two Persian dictionaries were collected, and were tagged in terms of their types  as well as their parts of speech; and the phonotactics of each were determined. The results of this research show reveal that several factors such as the type of syllable nucleus and the coda of the syllable may turn out to be effective on the phonotactics of the adjacent syllable. Also, there seems to be a specific relationship between the syllabic structures of the words with their types and parts of speech.  

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Reading comprehension skill is one of the fundamental and basic skill for understanding meanings and ideas available in the text. Attention to this skill especially for literary texts is one of the most important issues in the realm of language teaching. Using the right instruction methods for illuminating literary texts can confidently improve reading skills and reading comprehension of the students. Teaching reading comprehension texts based on critical thinking skills not only meets all the goals of literary texts, but also helps to improve the students’ reading comprehension. The aim of the current study is to investigate the effect of critical thinking skills on reading comprehension of Arabic literary texts among BA students of Arabic Language and Literature. The sample of the study consisted of 64 junior students of Arabic Language and Literature who were divided into two experimental and control groups. The experimental group was instructed based on critical thinking skills and the control group was instructed based on classical/traditional methods of teaching a text. The findings indicated that there is a significant difference between the performances of the groups and that critical thinking skills affects students’ reading comprehension skills.
The methodology for conducting this study followed a quasi- experimental design. The population of the study was all bachelor Arabic language and literature students of Iranian universities, among which 64 junior students of Shahid Beheshti and Yazd Universities were chosen as the experimental and control groups respectively.
The results showed that  there is a significant relation between the incorporation of critical thinking skills in teaching Arabic literary text and an increase in the students’ comprehension. This means that using the sub-skills of the skills” inference, recognition of assumptions, interpretation, evaluating the arguments and deduction” which were covered in the literature can lead to increasing the students’ comprehension.
 
 

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Mousavi Garmaroodi's translation of Sajjadiyeh scripture is one of the most accurate translations of this prayer book into Persian. And because of the large number of relative clauses in the Arabic text, the critique of the translation of this word has been the subject of the present speech. Using the descriptive-analytical method and after extracting and arranging the equivalents of this type of Relative “Ma” from the script in Garmaroodi translation, the authors have focused on the first category in two categories without "مِن " and with "مِن". Because of relative clauses without what has a vague meaning, the translator must use the context or descriptions of the text to find the right equivalent, and this requires the translator's artistry, linguistics, experience, and extensive knowledge of the language and Literature is Persian and Arabic. It follows from this research that Garmaroodi has taken two methods for relative clause without what: either to keep the rhyme and brevity in the original text, he has kept it vague and has given him equivalents such as "which [آنچه]", or has turned to equalizing and bringing clear words from the Persian language. In order to find a suitable equal, he has used the context of the words and phrases back and forth of relative clause and apparently some of the descriptions on the Sajjadieh scripture. In any case, this combined method is a testament to the translator's meticulousness, research, and fidelity, and his aesthetic taste, and has placed his translation into a literary and beautiful prayer in Persian.
 

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Ballasted track are of the most common species of railway in our country. The aim of this paper is study of three-dimensional models suitable for railway ballasted track and Dynamic analysis of those using numerical method Runge-Kutta 4th Order Method, after the dynamic analysis is performed and finally responses related to railway components be determined. To analyze the effect of passing under the railway train, a function of loading time on the railway line is applied and the effect of dynamic response under loading is evaluated. Previous researchers in the field activities of the railway system modeling and analysis of the dynamics on the two-dimensional models have been done. But this article is trying to consider the transverse nodes, on previous models and comes in three-dimensional dynamic analysis of the numerical method to be done. In other words, a new perspective in this article, consider nodes for transverse railroad modeling and numerical analysis of it. Brief description of the numerical methods mentioned along with the solving algorithm is mentioned in this article. In this research, simulation and modeling for rails, tie, connections and railway superstructure layers, is considered as elements of lump mass, spring and damper is used. Traditional methods used for the design of rail lines, based on static loading and quasi-dynamic analysis, the line components are analyzed, but in this article, according to the theories discussed in relation to rail component vibration, and study of dynamic load effects on track components into the issue to be more realistic. Responses obtained from dynamic analysis can be as input and issues designed to optimize rail components.

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Learning environment like other learning elements is a significant factor in improving the success of course planning and education progression. Due to the necessity of frequent usage of language in real environments, the significance of the environment in learning a foreign language is doubled. Although Arabic faculty groups have put promising efforts to enhance the environment of Arabic language speaking skill recently, it seems these environments are mostly in Persian language. In this paper, we investigate the obstacles which impede creating such environments. Therefore, we analyse experiences of Arabic language students via interviewing them. Finally, we propose solutions to tackle these obstacles. The results showed that challenges of Arabic learning environment include cases such as lack of learning group activities, anxiety, lack of encouragement to speak Arabic, use of Persian as the medium of instruction, lack of second language use by Arabic instructors in the class and lack of appropriate assignments.

1. Introduction
Concurrent with massive technological improvements and changes in methods of receiving and sending data, the topic of learning environments and their impact on the process of teaching-learning has become one of the main concerns of education and training researchers. To this end, the learning environment is not limited to the classroom. It can encompass different settings such as university, faculty, home, and society where learners aim for information, skills, abilities, and desired goals. As these environments get more dynamic and more related to the learner's goals and more aligned with educational content, learners play a more critical role in achieving the learning goals. Within the same direction, learning a foreign language requires an environment that language learners can utilise all their abilities to learn language skills. Although the importance of creating an appropriate Arabic environment and speaking Arabic in classrooms and educational spaces of university faculties is not hidden to anyone, one of the main problems of teaching this language in the last few decades is the lack of an appropriate environment for speaking the Arabic language. According to available data, the speaking environment in most Arabic groups inside and outside the classroom is Persian. Nonetheless, more efforts have been put toward enhancing Arabic language skills at universities in recent years. Some Arabic language teachers have encouraged their students to use this language in their natural environment and daily activities from the last decades until now. However, the main question is what challenges impede shaping such an environment and what constraints refrain students from using the Arabic language over the Persian language in classrooms and educational environments of universities. Accordingly, the Authors in this paper, who themselves are “teaching Arabic language” lecturers at university and encouraged their students to speak Arabic outside of speaking classes, aimed to search for challenges and constraints of achieving this goal by using students’ living experience. Therefore, the authors present practical suggestions based on student experiences for creating such university environments. Two questions are proposed to achieve the goal of research:

1. What is the most critical challenge in forming an environment for learning Arabic speaking from the student’s perspective?
2. What is the most practical solution to form an environment for learning Arabic speaking?

2. Literature Review
Considering the learning environment in learning language skills is of high importance. According to some of the learning views, such as communicational views of language teaching, enhancing the language skills of learners, especially their speaking skills, requires them to be in the real speaking environment. Based on the view, learners should be in the in real scenarios of speaking be part of presenting information which others don’t know, and in addition, they should speak about real topics in real conditions. They also should create concepts along with language and should practice exercises that are related to their needs (Tilver 1983 & Savignon 1983 equated to Chastain, 2011: 175). In an educational curriculum based on language skills, learners should be taught to use the language outside the classroom environment independent of educational exercises of each term. The learner should use whatever they have learned in the classroom, outside the classroom as well and be able to improve their language capabilities; they should be able to transfer his knowledge from language-living step, which is considering social and cultural language issues while using language, to practical knowledge which is the skill of using language (Bahrambeygi, 2020: 16).Therefore, since the primary goal of the educational curriculum of language teaching is improving the language capabilities of language learners to interact with other people, all aspects of the academic curriculum of language skills courses should be designed based on the most impactful learning environment, which is natural environments. Since the most crucial benefit of teaching in a natural environment is “consistent learning due to being sensible and incorporating the direct emotional experience of issues and events, not imposing the dull atmosphere in formal classes, creating motivation for learning and precise observation, which make the content of learning schedules more practical due to the connecting the education and living (Fallahian, et al, 2011: 11).

3. Research method
The research utilises a form qualitative research method and is conducted based on phenomenology. The goal of phenomenological studies is to study the world that can represent its individuals, especially when they are in the state of awareness that is expressive of an endeavour to become free of common prejudice and beliefs. Therefore, current research using this approach tries to extract students' living experiences around challenges of the Arabic speaking environment and presents theoretical and practical solutions to form an appropriate Arabic speaking environment. To collect information, semi-structured conversations are utilized. According to phenomenological research, individuals were chosen in conversation if they have experienced the event of interest; in other words, students who have some experience in the learning environment of Arabic speaking. Students were chosen to form three groups of weak, intermediate, and advanced speaking cohorts to increase data validity. During the interview, the focal topic was the following quest; what are the most challenging and impediments to the impactful environment in learning Arabic? Interviewees were selected based on targeted sampling, and sampling continued until “information saturation”. Information saturations were established by interviewing 220 students in terms four, five, six and seven of their bachelors in Arabic language and literature. To assure the validity of the finding, the “investigation using under-study individual” approach was used. Moreover, to investigate the confirmability of elements, two more analysers who were familiar with qualitative research revised the details. It was determined that they concurred with the first analyser in 90% of topics. Moreover, to evaluate the transferability criteria, the elements were provided to students out of the interviewee’s group, and they also found these elements similar to their experiences.

4. Discussion and conclusion
Due to the importance of language skills at educational and university centres in Iran, the living experience of Iranian Arabic learners shows that they are faced with different challenges in the learning environment of the Arabic language, such as inside classroom and outside classroom environments. And these challenges impede speaking the Arabic language. Based on the Arabic learners feedbacks, the most critical challenge is “not being coerced to speak Arabic by teacher”, “shyness and nervousness”, “low vocabulary range”, inappropriate arrangements of seats in classroom”, “no interactive environment”, “not using the classroom space optimally”, “teacher-oriented classes and lack of discussion among student”. In other classes also the most critical impediments of forming environment of Arabic language speaking are “very low usage of Arabic speaking by teachers”, “Dominant Persian language speaking in classes” , “speaking Arabic is not compulsory among student”. Among teachers the most critical challenges are “low range vocabulary and not being able to make sentences” “incapability to request” and “speaking of Persian”. Moreover, according to living experience of student “existence of no tranquil and dedicated to speaking Arabic” and “being afraid of ridicule” are the most critical challenges for not speaking Arabic. Along side the abovementioned challenges, challenges such as “negative view of public to Arabic language”,” No proper Arabic exercises”, “No cooperation for friend to speak Arabic” result in lack of experience in speaking Arabic in environment outside of universities such as home, dormitory etc. Therefore, these challenges can be categorized into three groups; Contend and approach of teaching, which is mainly related to inside class and is in control of teachers, the domain of environments outside classrooms which is related to faculties.; and the domain of outside faculties such schools, universities, home and student residential spaces.
 

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A crossbreeding experiment involving four Iranian fat-tailed sheep breeds, namely Kurdi (K), Chaal (C), Afshari (A) and Sanjabi (S) was carried out to determine the ram breed effects on productivity of Kurdi fat-tailed ewes (K) under extensive production system. A total of 475 Kurdi ewes were mated to 24 rams from four breeds producing 454 lambs including pure Kurdi, KK, (116 lambs), Afshari × Kurdi, AK, (113 lambs), Chaal × Kurdi, CK, (115 lambs) and Sanjabi × Kurdi crossbreds, SK, (110 lambs). Ram breed had a significant influence on early growth traits of the lambs (P < 0.01). The lambs sired by C rams were significantly heavier at birth and weaning than the other lambs (P < 0.05). Weight at 180 days of age (W180) in crossbred lambs was significantly higher than that of the purebred lambs (P < 0.05) while there was no significant difference among crossbred lambs for W180. Greasy fleece weight of lambs at first shearing (GFW) was significantly affected by ram breed (P < 0.05). Ram breed significantly influenced the fat-tail measurements of the lambs (P < 0.01). Number of lambs born and number of lambs weaned per ewe lambed or per ewe joined were not significantly influenced by ram breed effect, but the effect of ram breed on litter weight at birth and weaning per ewe lambed or per ewe joined was significant (P < 0.05). In general, ewes mated to Chaal ram had higher productivity than those mated to other ram genetic groups.

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This study was carried out in order to measuring Hg in some varieties of the most consumed imported and most locally cultured rice and comparing together and assess potential health risk. The correlation between Hg content of soil and rice samples, and effect of cooking and washing treatment on Hg concentration in rice, were investigated. In November 2008, locally most cultured rice and soil samples were collected from the Mazandaran province. High consumption of imported Indian rice with commercial brands collected from source, according to purposed method of standard office of Hormozgan. Advanced mercury analyzer Leco AMA 254 used to determination of Hg levels. The results showed that Hg concentration in Iranian rice (0.044 ± 0.003 µg g^-1 d.w) significantly over imported rice (0.039 ± 0.001 µg g^-1 d.w). Comparing the tolerable daily intakes (TDI) given by FAO/WHO with the mean estimated daily intakes (EDI) through rice consumption in this study was lower than TDI. In addition, results showed that no relationship was found between Hg concentration in rice and soil samples (r= 0.079, p=0.567), and cooking and washing treatment has not significant effect on mercury concentration. Finally, relationship between Hg concentration in soil and rice samples with soil parameters were studied that was not observed any correlation.

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The research aimed at mathematical modeling, kinetics and energy consumption of a hot air dryer with air recycle (0, 50%, and 75%). A hot-air dryer capable of recycling the exhaust air was used. The experimental data were fitted to standard thin-layer drying models in MATLAB 2007. The best model was selected according to the coefficient of correlation (R²), chi-square (c²) and root mean squares error (RMSE). These indices showed that the Midilli et al. model has the best fit for explaining the experimental data. The required energy was minimum at 0.5 m/s and 60˚C for 0%, 50% and 75% recycled air levels and was maximum at 1.5 m/s and 40˚C for all recycling levels. The hot-air recirculating system also reduced energy requirements and increased the drying time for aloe vera.

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In this study, residues of imidacloprid (Confidor) were measured in greenhouse cucumbers in Mazandaran Province, Iran. Confidor 200 SL was applied at the recommended rate (30.0 g ai ha-1) and its double (60.0 g ai ha-1). Samples were collected at 1 h to 21 days after application and analyzed to determine the content and dissipation rate of Imidacloprid. . Analysis was carried out by the QuEChERS method using HPLC-UV. The average initial deposits of imidacloprid on the cucumber fruits were found to be 1.93 and 3.65 mg kg-1 at the single and double dosages, respectively. Results showed that Imidacloprid was rapidly dissipated in cucumbers following a first order reaction kinetics at both application rates. The amount of dissipation in 21 days was 94.48% and 99.18% for, respectively, the single and double dosages. Residues of imidacloprid dissipated below the maximum residue limit (MRL) of 1 mg kg_1 in 3 days. Half-life (T1/2) for degradation of imidacloprid in cucumber was observed to be 3.40 and 2.70 days at the single and double dosages, respectively. A waiting period of 3 days is suggested for safe consumption of cucumber. Also, results showed that the dissipation was dependent on the initial application dose and followed a first order rate kinetics.

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