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Search Results: 1 - 10 of 3786 matches for " Sue-san Ghahremani Ghajar "
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Recovering the Power Inside: A Qualitative Study of Critical Reading in an Iranian University
Sue-san Ghahremani Ghajar,Masoumeh Kafshgarsouteh
Turkish Online Journal of Qualitative Inquiry , 2011,
Abstract: A fundamental goal of critical literacy approaches is to bring a change and empower students as critical agents and subjects of decision making. Students are expected to do more than simply accumulate information; they are encouraged to challenge their ‘taken for granted’ belief structures and transform themselves as well as their immediate social environment. In this article, we present a qualitative enquiry in a university reading course based on critical literacy. We explored how learners reflected on their individual/community and word/world concerns through critical understanding of texts and how they challenged and shattered their ‘taken for granted’ beliefs and started to transform into critical agents of voice and position. The data consists of 400 concept maps, called webs, and personal journals by fifty undergraduate English literature students at an Iranian University, as well as oral and written interviews. The data was qualitatively analyzed in search of themes that could illustrate students’ early thinking structures and their empowerment and transformations into subjects of decisions. The study revealed that, through webbing words/worlds and critically challenging texts, students took the opportunity to approach the knowledge and information presented to them analytically and critically. On this basis, we discuss how students were able to gain the power of critiquing, freeing their thoughts, finding and expressing their voice and position, discovering personal meanings in texts and contexts, cooperating and participating, and understanding learning for meaning through the critical act of reading.
Non-boiling heat transfer in gas-liquid flow in pipes: a tutorial
Ghajar, A. J.;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2005, DOI: 10.1590/S1678-58782005000100004
Abstract: in this tutorial the fundamentals of non-boiling heat transfer in two-phase two-component gas-liquid flow in pipes are presented. the techniques used for the determination of the different gas-liquid flow patterns (flow regimes) in vertical, horizontal, and inclined pipes are reviewed. the validity and limitations of the numerous heat transfer correlations that have been published in the literature over the past 50 years are discussed. the extensive results of the recent developments in the non-boiling two-phase heat transfer in air-water flow in horizontal and inclined pipes conducted at oklahoma state university's heat transfer laboratory are presented. practical heat transfer correlations for a variety of gas-liquid flow patterns and pipe inclination angles are recommended.
Health Conditions of the Industrial Animal Husbandries in Sari During 2000-2001
Mohammad Ali Ghajar Kohestani
Journal of Research in Health Sciences , 2011,
Abstract: Background: In the history there are long backgrounds to coexistence of human and domesticated animal. Counter effect of more than 150 common diseases threat the human and domesticated health. Due to climate condition of Mazandaran, in the North of Iran, the objective of the present study is to evaluate health conditions of the industrial animal husbandries (IAH) during 2000-2001. Methods: This descriptive survey was performed on 84 IAH is Sari city, Iran. Different variables such as place, distance from residential region, workshop dimensions, and number of domesticated animal were observed. In total, 67 units of IAH situated (79.7%) in mountainside, 17 units (20.2%) in the plain. Results: The distance from residential region were in 54 units (64.3%) less than 1000 meters and in 30 units (35.7%) more of 1000 meter. The average domesticated animal in IAB was 32 heads, that 29 heads in mountainside and 42 heads in the plain (Max. 220 heads and Min 6 heads). The accumulation ratio for an animal (5-6 m2) is not suitable for 65% or the animals. There is a significant between mountainside (61.6%) and plain (41%) (P < 0.01). Mostly, there was no isolation between ill and healthy animals (82% mountain, plain 47%). There was a significant relevance between non observance of evacuation of waste antiseptic zone and health services in the two regions (P < 0.05). There was a significant relevance in antiseptic of food container between the two groups (P < 0.01). Keeping of container and carrying of milk in a good condition was in 26.1 % of the IAH. Conclusion:
Skidding Machines Allocation (SMA) Using Fuzzy Set Theory
Ismael Ghajar,Akbar Najafi,Sattar Ezzati
Croatian Journal of Forest Engineering , 2010,
Abstract: Efficient allocation of resources is an essential principle in forest management. An important case in resource allocation is when the available resources are not sufficient to service all requests. One of the key elements in forest management is to minimize the total costs of the unallocated requests. With respect to high capital cost of forest operation machinery, it is necessary to reduce expenses of one cubic meter of wood extraction by appropriate Skidding Machines Allocation (SMA). Fuzzy set theory as a soft methodology and practical decision support system was used to handle uncertain variables and vague range of logs volume and physiographic conditions to develop models. The aim of this research is to present a decision support method to determine the economical activity zone of forest operation machines so that this allocation would result in the highest net profit for forest managers. To achieve this goal, all skid routes in the study area were divided into work units with 75 m width and 200 m length whereupon 379 units were formed collectively.Within each unit, the related mathematical productivity models were applied to estimate one cycle time and cost of machines. The effective factors of these models included Skidding Distance (SD), Volume of Logs per Cycle (VLC), and Number of Logs per Cycle (NLC). Three separate fuzzy inference models were developed to predict the skidding cost of each machine in the units, and then proper machines were allocated. 70% of data was used as training and the rest was feed to the models for validation and test process through the generation of fuzzy models. Membership functions and fuzzy rule bases were created with the help of scientific knowledge, experts’ viewpoints and existing machine productivity models. The results showed that the application of the presented approach helps forest managers to recognize the desirable conditions for skidding machines to reduce the total costs of skidding. In addition, SMA fuzzy rule-based models reflect how to integrate expert knowledge with engineering system design. To present an illustrative example, the models were applied to allocate three commonly used Skidders, i.e. Timberjack 450c, HSM 904, and Zetor, in a mountainous forest, whose inventory data were known and harvesting was planned for the next period. The results showed that the Zetor was the most economical option in Very short and Short (< 300 m) distances at all levels of NLC and VLC, while HSM 904 was the most cost effective machine at Medium , Long and Very long distances (300mto 900 m) at all le
Identifying Association Rules among Drugs in Prescription of a Single Drugstore Using Apriori Method  [PDF]
Ahmad Yoosofan, Fatemeh Ghovanlooy Ghajar, Sima Ayat, Somayeh Hamidi, Farshad Mahini
Intelligent Information Management (IIM) , 2015, DOI: 10.4236/iim.2015.75020
Abstract: These days, health care systems such as pharmacies and drugstores normally produce high volumes of data. Consequently, utilizing data mining methods in health care systems has become a conventional process. In this research, Apriori algorithm has been applied to perform data mining using the data obtained from the prescriptions ordered within a pharmacy. Ten association rules were achieved from the assigned pharmaceutical drugs in those prescriptions using the aforementioned Apriori algorithm. The accuracy of these rules is also manually studied and reviewed by a physician. Among these association rules, Vitamin D and Calcium pills are the most interrelated medications, and Omeprazole and Metronidazole rankd second in terms of association. The results of this study provide useful feedback information about associations among drugs.
混凝土控制强度的快速确定
san
武汉理工大学学报 , 1982,
Abstract: ?施工现场需要在早于28天、甚至早于7天前对混凝土的质量是否合格作出判断。如果不能较早地查出低强度的混凝土,而要纠正这种失误则往往花费很大,同时也很困难。一种较早的确定混凝土强度潜力的方法,是提高混凝土强度试件的早期温度。本文讨论了几种这类加速养护的方法。在美国一些标准化的方法中,沸水法(boilngwatermethod)显得最可靠。此法提供了在24~25小时龄期时的加速强度。最简单的方法是自然养护法(autogenouscuringmethod),此法在48小时龄期可得到强度。虽然利用加速养护1天或2天的强度不完全象28天的强度那样容易得到,但是工程师还是依靠这样一些试验,以迅速防止由于28天的强度不合标准而产生的复杂后果。
High Efficiency Double–Fed Induction Generator Applied to Wind Power Generator Technical Analyses  [PDF]
Deng-Chern Sue
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.33032
Abstract: High efficiency Double-Fed Induction Generator applies new power electronic technology, and utilizes vector control to fix the magnetic direction of the stator to the vertical axis. Adjusting the input current of rotor via an inverter can separately control the cross axis and vertical axis current of real power and reactive power of a generator. Traditionally, rotating speed affects frequency and the output is unstable. This study concentrates on high efficiency Double-Fed Induction Generators and Traditional Generators from mathematic model to derive and control the characteristics simulation and comparison than get an output of high efficiency Double-Fed Industrial Generators. This study utilizes the simulation software MATLAB/Simulink to simulate the response characteristics of vector control of a Double-Fed Industrial Generator. The operating and control functions are better than those of a traditional generator.
Impact of falls on early mortality from severe traumatic brain injury
Linda M Gerber, Quanhong Ni, Roger H?rtl, Jamshid Ghajar
Journal of Trauma Management & Outcomes , 2009, DOI: 10.1186/1752-2897-3-9
Abstract: After exclusion criteria were applied, a total of 2162 patients were eligible for analysis. Falls contributed to 21% of all severe TBI, 12% occurring from > 3 meters and 9% from < 3 meters. Two-week mortality ranged from 18% due to injuries other than falls to 31% due to falls from < 3 meters (p =< 0.0001). Mortality after a severe TBI is much greater among older people, reaching 58% for people 65 years and older sustaining a fall from < 3 meters.Among those 65 and older, falls contributed to 61% of all injuries and resulted in especially high mortality among individuals experiencing low falls. Preventive efforts directed toward older people to avoid falls from < 3 meters could have a significant impact on mortality.Traumatic brain injury (TBI) is the leading cause of death among ages 1 to 44 years. Each year in the United States there are 50,000 deaths from TBI and an additional 70,000 to 90,000 individuals are left with permanent neurological disabilities [1]. TBI is the leading cause of death among all trauma-related deaths [2,3].Since 2000, a quality improvement (QI) program exists in New York for tracking the treatment of severe TBI patients (Glasgow Coma Scale [GCS] score < 9) in 24 of the 46 state designated trauma centers. The program, initiated by the Brain Trauma Foundation and funded through the New York State Department of Health Bureau of Emergency Medical Services, is designed to assess and implement adoption of the evidence-based Guidelines for the Management of Severe Traumatic Brain Injury. The Guidelines were formulated and disseminated in 1995 [4] and updated in 2000 [5] and 2006 [6] by the Brain Trauma Foundation in collaboration with the American Association of Neurological Surgeons.Severe TBI results in prolonged hospital stays and is the most common cause of traumatic deaths [7,8]. Most severe TBIs are due to falls or motor vehicle-related incidents [9]. The populations at risk for the causes of injury vary by age and other demographic charact
Preparation, Characterization and Antibacterial Properties of Silver-Chitosan Nanocomposites Using Different Molecular Weight Grades of Chitosan
S Honary, K Ghajar, P Khazaeli, P Shalchian
Tropical Journal of Pharmaceutical Research , 2011,
Abstract: Purpose: To study the effect of chitosan molecular weight on the physicochemical and antibacterial properties of silver-chitosan nanoparticles. Methods: A series of silver-chitosan nanoparticles of different sizes were produced using various molecular weight (MW) grades of chitosan by an aqueous chemical reduction method. The nanoparticles were characterized by ultraviolet-visible absorption spectroscopy (UV-Vis), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), dynamic light scattering (DLS) and laser Doppler electrophoresis (LDE). The antibacterial properties of the nanoparticles were also evaluated by agar diffusion method. Results: The size of the silver-chitosan nanoparticles, ranging from 21.9 to 175.3 nm, was influenced by chitosan MW as well as by other process conditions. Although, the nanoparticles were not stable in liquid form, they however showed good stability in the solid state due to their low zeta potential. SEM images indicate that the nanoparticles were spherical. The antibacterial activity of the nanoparticles against Staphylococcus aureus increased with decrease in particle size owing to increase in surface area. The smallest particle size (21.9 nm) was obtained by using high chitosan MW at 4 °C and a stirring speed of 800 rpm. Conclusion: Chitosan is an effective agent for the preparation of silver nanoparticles. The size of the nanoparticles can be modulated by varying both chitosan MW and process conditions such as temperature and stirring speed.
Treatment of Bilateral Macrostomia (Lateral Lip Cleft): Case Report
Ahmad Khaleghnejad-Tabari,Katayoun Salem,Masoud Fallahinejad Ghajar
Iranian Journal of Pediatrics , 2012,
Abstract: Background: Macrostomia as a rare facial deformity is classified among facial clefts. It originates from failure in union of maxillary and mandibular prominences of first brachial arch during 7th embryonic week.Case Presentation: We report a case of bilateral macrostomia (bilateral lip cleft) in a female newborn as a sole entity without other skeletal and facial deformities. The cleft was repaired by a simple linear triangular flap using extra oral landmarks to locate lip commissures. Patient was followed through a six-month period.Acceptable results were gained in mouth appearance as well functional aspects.Conclusion: Commissural repair through a linear flap can result in minimal visible scar with satisfying results in both esthetics and functional aspects.
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