Purpose: Managers are one of the important elements of an organization, for this reason, in order to draw the future of the organization, it is necessary for the planners to specify the conditions of their selection and appointment. Therefore, the current research has been done with the aim of identifying and analyzing the components of selecting future principals.Method: In this research, comparative and benchmarking method is used as a prospective approach. This approach is based on the belief that today's advanced organizations/countries can be considered as a model for the future of another organization/countries in their respective subjects. For this, first, the fields of comparison and benchmarking were determined using Brody's four-step comparison method; then the countries of Canada, Finland, Australia, South Africa, and Japan were selected according to the qualitative balance value in the international advanced TEAMS test, human development index, life quality index(health, instruction, and welfare), education quality index, and other scientific-scholarly indexes; finally, by extracting the criteria for the selection and appointment of principals through content analysis and comparison with Iran, the proposed framework for Iran has been presented.Findings: A total of 61 components for the selection of secondary school principals were identified from among the studies conducted in the selected countries in this article. By extracting the commonalities and differences of each of the components among the countries, it was found that the highest index of manager selection and appointment belongs to Japan and the lowest one is related to Finland.Conclusion: There are similarities between the components of selection of principals of secondary schools in Iran and selected countries. In Iran, special attention should be paid to important components such as adherence to religious principles, appropriate personality traits, creativity and innovation, motivation to develop capabilities, professional growth, power of supervision and accountability, social image, leader skills, and purposefulness and foresight.

The aim of this study was to investigate the effect of using portulaca oleracea as a source of plant antioxidants for feeding fattening male lambs, on carcass traits, meat quality, and oxidative stability. Twenty-one male lambs with an average weight of 24±1.5 kg and 150±15 days old were fed with one of the experimental rations included a diet without portulaca oleracea as control, a diet containing 7.5%, and a diet containing 15% portulaca oleracea, for 84 days. The muscle (Longissimus dorsi) samplewas used to determine pH, chemical composition, colorimetric properties, and oxidative stability of meat. Meat lipid oxidation was determined after 1, 7, and 30 days of refrigerated storage using thiobarbituric acid (TBARS). The use of portulaca oleracea in diets improved meat color characteristics such as L, chroma, and Hue. The highest ash concentration and the lowest meat moisture were observed in the treatment of 15% portulaca oleracea (P<0.05). Meat pH was the lowest in the first hour after slaughter but did not differ at 24 h. Compared to the control, in both treatment groups feeding the lambs with portulaca significantly reduced the concentration of Malondialdehyde in the meat of the lambs and increased the meat oxidative stability (P<0.05). The results of this experiment showed that feeding portulaca oleracea by improving properties such as color and increasing the meat oxidative stability improves meat quality, which may have lead to an increase in its nutritional value in terms of human health.

To provide the privacy of the users who receive some computing services from the cloud, the users must encrypt their documents before outsourcing them to the cloud. Computation on outsourced encrypted data in the cloud rises some complexity to the system especially in the case when an entity would like to find some documents related to a special keyword. Searchable encryption is a tool for data owners to encrypt their data in a searchable manner. Generally, there exist two kinds of searchable encryption, namely symmetric (secret key) and asymmetric (public key) ones. Most of the public key searchable encryption schemes are vulnerable to the keyword guessing attack (KGA). In this paper, we propose an attribute-based keyword search scheme which is proved to be secure against KGA. Also, we formally prove that the proposed scheme is secure against another attack, namely the chosen keyword attack (CKA) in the random oracle model.

Nezami's Poem is in the front rank of poetry. He always attempted to choose the best words- fine words using beautiful words and expressions. His poetry is enriched by his power of imagination and awareness of the common knowledge and beliefs of the time. The common features of his speech includes a unique use of the words-word choice, creating new compounds, compounding- description, repetition, emphasis, transformation, omission, using Quranic verses, Islamic hadiths and Arabic compounds, expressions of astrology and medicine, adages, proverbs and idioms regularly used by ordinary people. He is a poet familiar with the language of ordinary people and their beliefs, customs and traditions. Since he rightfully attended to the spoken language and because of his particular style of speech, his works are full of street talks to the extent that this propery can be viewed as the prominent stylistic feature of his poems. He took advantage of the common sciences of the time and utilized the scientific, astrological and medical terms and also the technical meanings and themes of these sciences. His imagination and awareness of the sciences and beliefs made his poems productive. Some of the features of his poems are as follow:1- Imagery: Imagery refers to producing pictures, paintings or shows in the mind of readers /listeners using words. That is, the poet or writer should have such mastery over using words, space, meanings and their relations that makes him able to effectively use the sentences and words to create paintings, pictures or shows in the mind of readers or listener, to enable the reader to imagine a real painting or picture when he is over with his reading.2- Diction: Experts of language issues and grammar beliefs that word coining can strengthen the foundation of language. So, the first premise in creating fine text is to choose musical words appropriate for the given text and meaning. In the first step, melodic, expressive, rich words compatible with the spatial totality should be choosen. This powerful diction is one of the major reasons for the immortality of Nezami's poems.  3- Compounding: In addition to words which need to be musical and melodic, literary compound should supplement the musical quality of the text. Since compounding is one the major features of Persian language, Nezami effectively utilized his power of compounding and its one of the prominent features of his poetry.4- Description: In his poems, description of the nature is done through personifications, descriptions, similies and metaphors, and this description is indispensible feature of the theme that improves the manifestation of the heroes and events from the poetic perspective. Since His poems are full of personifications, all the manifestations of the nature simply represent characteristics, attitudes and thoughts of human beings. A plentiful supply of finest descriptions can be found in his Masnavi-e Khosro va Shirin 5- Repetition:Repetition of a morpheme, word or picture proves to be one of the main characteristics of his poems. Nezami uses a large variety of repetitions in his poems and this variety in repetition enriches his works. Reading the poems of Nezami, one can understand that the initial words determine the following morphs and words. In fact, words are chosen based on their melodic properties.Conclusion: Generally speaking, in a noble poem, imagination, melody and form should be consistent in order to reach the optimal goal. If they are not consistent with each other the poem may not be influential as well as possible. So, the music of the poem should be compatible with the imagination and the language of the poem. A successful poet attends both to the form and meaning of the poem and does not strengthen one at the expense of the other one. Nezami attends to both form and meaning.

Purpose: Clustering and co-word analysis is a method to reveal relationships and links and illustrate the intellectual structure of a scientific field. This research tries to study the intellectual structure of articles in the field of futures studies in Iran by using the technique of co-word analysis. Method: The current research is a descriptive-analytical development with a scientometric approach. The statistical population is 921 articles retrieved records in the field of futures studies. Findings: The findings showed that articles in the field of futures studies in Iran are often associated with positive growth, and in terms of frequency, the keywords scenario, Islamic Republic, and foresight are the most frequent in futures studies. The findings related to the hierarchical clustering led to the formation of 8 clusters in this field, namely "ICT visions", "geographers who love the future", "knowledge development", " Futuristic higher education", "Future of Religion", "Regional Relations", "Strategic Foresight" and "Heavy Weight of Method". Conclusion: According to the findings of the current research and the high frequency of the keyword scenario, as well as the density and relationships of this keyword with other keywords, it can be concluded that the scenario is the dominant approach in futures studies. Also, according to the resulting clusters, it was observed that these researches have a high variety, but addressing the future in many areas is still neglected.

The most important issue raised in political jurisprudence is electoral or essay- based determination of the supreme leader. It is essebtial to examine the works of scholars who believe in the theory of velayat-e faqih in order to clarify the nature of the people's vote in terms of selection, essay or recognition of the ruler. The current paper aims to determine the nature of "Creation" and granting leadership by the people of the province as a condition for the legitimacy of the Supreme Leader as well as a complement of the divine legitimacy. Using descriptive and analytical approach, we addressed various issues and concluded that "Creation" or "choice", according to the nature and role of "allegiance" in this theory implies, in fact, that the "Creation" of the fully qualified jurist and his selection for the office of the province has the nature of "diagnosis"; and is directly done by the people or through a council of experts.

To optimize tomato (Solanum Lycopersicum) plant tissue culture condition, the effect of 13 different hormonal combinations and two explants of cotyledon and hypocotyl on the regeneration rate of three Newton, Infinity and Defines cultivars were investigated. Experiments were conducted in a factorial based on a completely randomized design with three replications. The highest shoot number (11.9 shoots per explant) was obtained for Defines cultivar on MS medium containing the hormones of TDZ=0.68, NAA=0.1milligrams per liter and cotyledon explant. Plant defense responses against environmental factors are one of the inhibitor factors of explants regeneration in plant tissue culture. Calcium ion signaling is one of the primary events and, of course, the most important event in plant defense response against pathogens, Therefore, the effect of verapamil as a calcium channel blocker was investigated on the plant defense response. For this purpose, inoculation was performed using Agrobacterium tumefaciens strain LBA4404 and based on optimized tissue culture condition. The effect of verapamil in four concentrations of 0, 50, 100 and 200 milligrams per liter was investigated in a co-culture medium. Results showed that the use of verapamil in comparison with the control sample reduced the plant defense response. Also, the use of 50 milligrams per liter of verapamil increased the amount of regeneration