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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: علوم و مهندسی آبیاری
- نوع مقاله: Journal Article
- کلمات کلیدی: Dust,Erosion,Soil moisture content,Wind Tunnel,Soil Stabilization,Granulation
- چکیده: This research conducted various experiments using a wind tunnel on soil samples from the most critical parts of dust sources in southeastern of Ahvaz. The main goal of this study is to show the effect of moisture on the movement of soil particles in the dust centers. The laboratory work was carried out in two parts: a: Addition of water to completely disturbed soil surface (wetting in the bag) b: Addition of water to soil layers of samples wetting that was named pseudo undisturbed soil.
The results showed that dust generation under natural conditions (dry soils) in a laboratory wind tunnel will be 53 times more than the pseudo undisturbed soils with moisture content of 2-4% in volume. Moreover, soils with moisture contents of 5-8 and 10-12% do not differ significantly from those with 2-4% moisture content in preventing dust generation. If soil surface is disturbed after it is provided with adequate moisture, not only will dust generation not decrease compared to the case when the soil surface was dry but it will also increase by 25 percent. The practical point of this study is that in the study area, increasing soil moisture between 2 to 4% can greatly reduce the formation of dust.- چکیده انگلیسی: This research conducted various experiments using a wind tunnel on soil samples from the most critical parts of dust sources in southeastern of Ahvaz. The main goal of this study is to show the effect of moisture on the movement of soil particles in the dust centers. The laboratory work was carried out in two parts: a: Addition of water to completely disturbed soil surface (wetting in the bag) b: Addition of water to soil layers of samples wetting that was named pseudo undisturbed soil.
The results showed that dust generation under natural conditions (dry soils) in a laboratory wind tunnel will be 53 times more than the pseudo undisturbed soils with moisture content of 2-4% in volume. Moreover, soils with moisture contents of 5-8 and 10-12% do not differ significantly from those with 2-4% moisture content in preventing dust generation. If soil surface is disturbed after it is provided with adequate moisture, not only will dust generation not decrease compared to the case when the soil surface was dry but it will also increase by 25 percent. The practical point of this study is that in the study area, increasing soil moisture between 2 to 4% can greatly reduce the formation of dust.- انتشار مقاله: 20-10-1399
- نویسندگان: Abdolazim Ghomeishi,Mehdi Ghomeshi,Mohammad Mahmoudian Shoushtari,Ahmad Landi,Mohammad Hosain Purmohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Future of Medical Education Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Medical students,Academic Performance,Keywords: Gardner Intelligences
- چکیده:
- چکیده انگلیسی: Background: Gardner’s Multiple-Intelligences profile can serve as a powerful instrument for assessment of learners' abilities and aptitudes. The present study aimed to obtain the Gardner’s Multiple Intelligences profile of students of Tabriz University of Medical Sciences (TUOMS) in the academic year 2014-2015 and examine its relationship with their academic performance.
Methods: This cross-sectional descriptive-correlational study was conducted on medical, nursing and midwifery students of TUOMS in the academic year 2014-2015. Data was collected by administering Gardner’s Multiple Intelligences Developmental Assessment Scales to 150 subjects selected by non-probability convenience sampling. Academic performance of students was evaluated by their average grades. Data was analyzed by SPSS19 using multiple regression.
Results: Medical students scored highest in existential intelligence (18.42 ± 4.67) and intrapersonal intelligence (16.74 ± 4.15) and scored lowest in musical intelligence (12.54 ± 3.99) and bodily intelligence (13.66 ± 4.46). Regression analysis showed that verbal intelligence (P= 0.004, β = 0.392) and existential intelligence (P= 0.014, β = -0.327) were the only Gardner intelligence components that can explain the students' academic performance with statistical significance.
Conclusion: The results showed that among Gardner’s Multiple-Intelligences, existential, intrapersonal, interpersonal, and verbal intelligence contribute the most to the selection of medical sciences as the path of education, and that verbal intelligence is associated with academic success. The results of this study can be employed as an applied knowledge to improve the quality of education counseling to be provided for future medical students.- انتشار مقاله: 29-04-1396
- نویسندگان: Roghayeh Poursaberi,Mohammad Mehdi Mohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Gas Processing Journal
- نوع مقاله: Journal Article
- کلمات کلیدی: Capillary Number,Gas Condensate,Rlative Permeability,Positive Coupling Effect,Weber Number
- چکیده:
- چکیده انگلیسی: Positive coupling effect in gas condensate reservoirs is assessed through a pure theoretical approach. A combination of linear stability analysis and long bubble approximation is applied to describe gas condensate coupled flow and relative permeability, thereof. The role of capillary number in gas condensate flow is clearly expressed through closed formula for relative permeability. While the model is intended to give a clear image of positive coupling through comprehensible fluid mechanical arguments, it predicts relative permeability values that are not too far from limited published experimental data presented in the literature. Based on the systematic deviation of the model results from experimental data, it could be expected to serve as a basis for generalized gas condensate relative permeability correlations by including inertial effects in terms of Weber number as discussed in this study. The success of this theoretical approach in describing the role of capillary number and Weber number on gas condensate relative permeability motivates further study of the underlying mechanism of flow coupling in near well-bore region of gas condensate reservoirs in the hope of pure theoretical and yet predictive equations for gas condensate relative permeability.
- انتشار مقاله: 23-07-1394
- نویسندگان: Mohammad Mohammadi-Khanaposhtani,Mohammad Mohammadi-Khanaposhtani,Mohammad Mohammadi-Khanaposhtani
- مشاهده
- جایگاه : پژوهشی
- مجله: Interdisciplinary Journal of Virtual Learning in Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Elite,Brain circulation,Reverse migration,Diaspora,Shiraz University of Medical Sciences
- چکیده:
- چکیده انگلیسی: Background: Brain mobility is an alternative word for brain drain. Today, brain drain is considered as a major loss that has a very harmful effect on developing countries. The brain movement, and inverse immigration depends a lot on policies adopted in the countries of origin. This research was conducted with the aim of investigating the role of virtual networks and diaspora in elite brain mobility and circulation in Iran. Methods: This study was conducted using a mixed-method approach based on sequential exploratory strategy in 2018. In qualitative section a semi-structured interview was conducted with 19 former graduates who had returned back to Iran. The theoretical saturation was reached via a purposeful sampling and maximum variation by applying conventional content analysis method processes. In the quantitative section, a questionnaire was developed and its validity and reliability was tested and verified for data collection. The questionnaire was distributed among a random sample of 285 physicians out of a target population of 1100 physician returnees. Only 158 participated in the study by returning the completed questionnaire. In addition, the data were reviewed by applying descriptive-survey method, and content analysis was used to analyze the collected data. Results: Regarding the theme of inclusive elite brain mobility and circulation, the results are indicative of the existence of 18 basic themes, and 4 organizing themes including: cultural strategies, educational and research strategies, management strategies, social and economic strategies, and 1 global theme. The Basic Islamic Cultural Requirement theme (with a factor of 0.83, P<0.001) is the best descriptor for elite brain circulation and movement. Conclusion: Developing countries not only should send their elite medical graduates abroad to gain professional experiences, but also they should try to motivate them for inverse migration to their homeland by creating and promoting Diaspora networks.
- انتشار مقاله: 22-09-1378
- نویسندگان: Zahra Yazdani,Parviz Saketi,Fariba Karimi,Mohammad H Yarmohammadian
- مشاهده
- جایگاه : پژوهشی
- مجله: Amirkabir (Journal of Science and Technology)
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی:
- انتشار مقاله: 24-05-1396
- نویسندگان: NEMATALLAH MARDANI MEHRABAD,MAJID SAFAR FOHARI,MOHAMMAD MOHAMMADI AGHDAM
- مشاهده
- جایگاه : پژوهشی
- مجله: Archives of Bone and Joint Surgery
- نوع مقاله: Journal Article
- کلمات کلیدی: Nerve injury,ACL reconstruction,Hamstring graft harvest,Infrapatellar branch of saphenous nerve,Saphenous nerve
- چکیده:
- چکیده انگلیسی: Background: Injury to the infrapatellar branch of the saphenous nerve (IPBSN) is common after arthroscopic ACL
reconstruction with hamstring tendon autograft, as reported in up to 88% of the cases. Due to close relationship
between the IPBSN with pes anserine tendons insertion skin incision may sever IPBSN while harvesting gracillis and
semitendinous tendons. As the IPBSN course at the anterior of knee is oblique, we hypothesized a parallel skin incision
with nerve passage may decrease nerve injury.
Methods: Vertical and oblique incisions were compared in 79 patients in this clinical trial. The sensory loss area and
patients’ complain of numbness were measured at 2 and 8 weeks as well as 6 months after surgery.
Results: Both the sensory loss area and patients’ complain of numbness decreased significantly in the oblique incision
group (P<0001).
Conclusion: According to our findings, oblique incision is suggested instead of traditional vertical incision when
hamstring tendons are being harvested in arthroscopic ACL reconstruction with hamstring tendon autograft.
Level of evidence: IV- انتشار مقاله: 10-10-1395
- نویسندگان: Hamid Mousavi,Mohammad Mohammadi,Hossein Akbari Aghdam
- مشاهده
- جایگاه : پژوهشی
- مجله: Challenges in Nano and Micro Scale Science and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Electroosmotic flow,KEYWORDS lattice Boltzmann,slip velocity boundary conditions
- چکیده:
- چکیده انگلیسی: The aim of the present work is to analyze the accuracy and to extend the capability of lattice Boltzmann method in slip EOF; a phenomenon which was previously studied by molecular dynamics and less considered by LBM. At the present work, a numerical experiment on boundary conditions of slip velocity is performed and the proportionality of slip with shear stress in electroosmotic pump is proved. Results show that LBM can capture the slip length in EOF with liquid operating fluid. Implementing slip velocity at the walls of a microchannel, the electroosmotic flow with adverse pressure gradient over a hydrophobic surface is investigated in view of mixing reduction. The fluid flow is assumed to be laminar, steady and viscous. Slip at the channel boundaries will decelerate the development process of the flow. Unlike no-slip condition, transverse change in velocity magnitude near the walls decreases and also more resistant pressure is required to create reverse centerline velocity; so mixing probability and performance of EOF pump can alter considerably.
- انتشار مقاله: 21-03-1397
- نویسندگان: Ahmad REza Rahmati,Hossien Khorasanizadeh,Mohammad Reza Arabyarmohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Revue des Études de la Langue Française
- نوع مقاله: Journal Article
- کلمات کلیدی: polyphonie,point de vue,énonciateur,dialogisme,locuteur,sens.
- چکیده: La notion de polyphonie renvoie aux réflexions de Bakhtine qui, par ses analyses linguistiques sur la poétique de Dostoïevski (1970), remarquait que l’œuvre romanesque n’est pas un dialogue clos de l’auteur, mais un lieu par excellence de dialogue, interaction et de rencontre de plusieurs voix. Il s’agit bien sûr de multiplicité de «consciences équipollentes» et des pluralités de styles qui se disputent et se font entendre simultanément à travers le discours du narrateur. De son inspiration bakhtinienne, le linguiste-pragmaticien français O. Ducrot (1972, 1980b & 1984), a repris ladite notion et l’a développée pour élaborer sa fameuse théorie de polyphonie énonciative-sémantique. Il faut remarquer que la thèse de Ducrot en reste théorisée et originale; sachant que Bakhtine ne s’intéresse généralement qu’aux configurations polyphoniques dans les textes littéraires, mais tandis que le linguiste français s’appuie essentiellement sur une description polyphonique de la phrase qui est unité de la langue. Dans cette recherche polyphonique, tout en optant pour la polyphonie linguistique ducrotienne, nous voudrions dire comment le sens d’un énoncé se construit entre le «déjà-dit»(de l’interlocuteur-énonciateur) et le «dire» du locuteur-sujet parlant au moment de la constitution de son discours. Ce qui nous intéresse plus ici, c’est l’excellent rôle de certains marqueurs linguistiques qui recèlent la trace de la voix ou point de vue de l’autrui du discours romanesque qui parle indirectement (non en chair et en os) à travers l’acte d’énonciation du locuteur-narrateur.
- چکیده انگلیسی: مضمون زبانشناختی" گفتمان چند صدایی" برآمده از اندیشهها و تحقیقات ادبی- زبانشناختی منتقد شهیر روسزبان، میخاییل باختین است که به باور او، ضمن کاوش بر روی آثار نویسندۀ روس داستایفسکی (1970) که دارای ویژگی بارز کلام چندصدایی یا اصطلاحاً گفتگومند بوده، یک متن ادبی صحنۀ مکالمهای بسته بین نویسنده و شخصیتهای آن نبوده بلکه محلی مناسب برای تعامل و گفتگو بین متن حاضر و متون پیشین میباشد.
با الهام از نظریه دیالوژیسم باختین، زبانشناس شهیر فرانسوی اوزوالد دوکرو نظریۀ معروف " گفتمان چندصدایی" را بیش از همه در حوزۀ زبانشناسی و گزاره هایمجزا بسط داده و در ادامۀ مطالعات خود بر سویۀ "بیانی – معنیشناختی" آن تأکید میکند، که همین مسئله منحصر به فرد بودن نظریۀ دوکرو را اثبات میکند. چونکه پدیده معنا از ورای سخن و مسائل زبانی دخیل بین پرسوناژها و تعامل آنها با نویسندۀ داستان در داخل متن و بیرون از آن حاصل میشود. در این مقاله، به پیروی از دوکرو، برآنیم تا نظریه گفتمان چندصدایی را به واسطۀ چند مورد شاخص از نشانگرهای زبانشناختی که صدا یا نکته نظر دیگری را مستقیم یا غیر مستقیم در کلام ادبی نشان میدهد مورد مطالعۀ قرار دهیم.- انتشار مقاله: 22-06-1396
- نویسندگان: Mohammad Mohammadi-Aghdash,Mohammad Mohammadi-Aghdash,Mohammad Mohammadi-Aghdash,Mohammad Mohammadi-Aghdash
- مشاهده
- جایگاه : پژوهشی
- مجله: Research in English Language Pedagogy
- نوع مقاله: Journal Article
- کلمات کلیدی: Autonomy,self-motivation
- چکیده:
- چکیده انگلیسی: Zoltán Dörnyei (2005) proposed a new form of motivation which is aiming at equipping the learners with a lifelong approach to motivation which is self-induced by the learner and it is not needed for any extrinsic mediation, having understood how to keep yourself motivated. This study was an attempt to find out the effect of self-motivation strategies instruction on the learners belief on learner autonomy in L2 learning. To find out the possible effect of our independent variable we selected one intermediate level class in grade 2 (25 male) in high school out of the whole population of high school students in west Azerbaijan, Iran via availability sampling. Having ensured for the homogeneity of the class members’ English proficiency through Nelson test, we gave them a questionnaire on the learner’s belief on autonomy in learning L2 to answer. Then within two months, in a separate class the students were given instructions on how to employ self-motivation strategies while learning English. After two months of instruction, they were given the same questionnaire again to get to know the possible effect of our independent variable. Having analyzed the obtained data in SPSS software, the results showed that our hypothesis was rejected and our null hypothesis was verified.
- انتشار مقاله: 15-11-1394
- نویسندگان: Seyyed Taher Alavi,Mohammad Mohammadi
- مشاهده
- جایگاه : پژوهشی
- مجله: Sociological of Studies of youth
- نوع مقاله: Journal Article
- کلمات کلیدی: Social Capital,socio-economic status,cultural capital,religiosity,consumption of cultural goods
- چکیده:
- چکیده انگلیسی: One of the most common methods to identify and represent oneself, especially in contemporary era, is cultural consumption. In cultural consumption, people often consume a variety of valuable goods and symbols, not because of their material value but due to their cultural one in order to create desirable images of themselves in the minds of others. In the meantime, the choice of a particular pattern of cultural consumption or cultural practices or preferences requires cultural resources or cultural capital; or in other words, cultural consumption needs cultural resources and cultural capital. In the present study, the statistical population including 15-29 year olds in Yasuj and a sample size of 379 people were selected. Amos software was used to analyze the data. The results suggested that, there is a relationship between independent variables (religiosity, cultural capital, social capital and socio-economic status), and the consumption of cultural goods. The output of the model also indicates that the variable of cultural capital (0.32) has explained the highest amount of variance of cultural consumption. Moreover, the variables of social capital and religiosity explained 18% and -18 %t of the variance of cultural consumption in the workplace.
- انتشار مقاله: 12-10-1399
- نویسندگان: Seyed Ali Hashemianfar,Ali Seyfzadeh,Parvaneh Bayati,MohammadReza Ranjbar Mohammadi
- مشاهده