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Issue Info: 
  • Year: 

    2018
  • Volume: 

    18
  • Issue: 

    3
  • Pages: 

    311-322
Measures: 
  • Citations: 

    0
  • Views: 

    763
  • Downloads: 

    0
Abstract: 

The DESIGN process of an Autonomous Underwater Vehicle (AUV) requires mathematical model of subSYSTEMs or disciplines such as guidance AND control, payload, hydrodynamic, propulsion, structure, trajectory AND performance AND their interactions. In early phases of DESIGN, an AUV are often encountered with a high degree of uncertainty in the DESIGN variables AND parameters of SYSTEM. These uncertainties present challenges to the DESIGN process AND have a direct effect on the AUV performance. Multidisciplinary DESIGN Optimization (MDO) is an approach to find both optimum AND feasible DESIGN AND robust DESIGN is an approach to make the SYSTEM performance insensitive to variations of DESIGN variables AND parameters. It is significant to integrate robust DESIGN AND MDO for DESIGNing complex engineering SYSTEMs in optimal, feasible AND robust senses. In this paper, an improved robust MDO methodology is developed for conceptual DESIGN of an AUV under uncertainty with considering TACTIC AND SYSTEM DESIGN SIMULTANEOUSLY. In this methodology, Uncertain Multi-Disciplinary Feasible (UMDF) framework is introduced as uncertain MDO framework. Two evolutionary algorithms are also used as Pareto-based Multi-Objective optimizers AND results of two algorithms are compared. The results of this research illustrate that the new proposed robust multidisciplinary DESIGN optimization framework can carefully set a robust DESIGN for an AUV with coupled uncertain disciplines.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    52
  • Issue: 

    3
  • Pages: 

    189-194
Measures: 
  • Citations: 

    1
  • Views: 

    127
  • Downloads: 

    38
Abstract: 

Intracytoplasmic sperm injection (ICSI) is one of the most successful techniques of Assisted Reproductive Technology (ART) AND is mostly in use for the treatment of infertility with male factors. In this method, before injecting sperm into the intracytoplasmic of the oocyte, cumulus cells around the oocyte must be stripped to facilitate the injection process. To achieve this, both enzymatic AND mechanical methods are used in embryological laboratories for denudation, which has major deficiencies, including the possibility of damaging the oocyte prior to the injection process. In this research, a microfluidic-based device is introduced for the separation of cumulus cells around the oocyte with minimum manual operations. The results prove high efficiency, AND non-destructive denudation of the oocyte with the reduced amount of culture medium leads to the low-cost preparation process of oocytes. The process can also be integrated with ICSI chips under development AND will be reported shortly.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    52
  • Issue: 

    1
  • Pages: 

    51-60
Measures: 
  • Citations: 

    0
  • Views: 

    135
  • Downloads: 

    36
Abstract: 

Non-cooperative intelligent control agents (ICAs) with dedicated cost functions, can lead the SYSTEM to poor performance AND in some cases, closed-loop instability. A robust solution to this challenge is to place the ICAs at the feedback Nash equilibrium point (FNEP) of the differential game between them. This paper introduces the DESIGNation of a robust decentralized infinite horizon LQR control SYSTEM based on the FNEP for a linear time-invariant SYSTEM. For this purpose, two control strategies are defined. The first one is a centralized infinite horizon LQR (CIHLQR) problem (i.e. a supervisory problem), AND the second one is a decentralized control problem (i.e. an infinite horizon linear-quadratic differential game). Then, while examining the optimal solution of each of the above strategies on the performance of the other, the necessary AND sufficient conditions for the equivalence of the two problems are presented. In the absence of the conditions, by using the least-squares error criterion, an approximated CIHLQR controller is presented. It is shown that the theorems could be extended from a two-agent control SYSTEM to a multi-agent SYSTEM. Finally, the results are evaluated using the simulation results of a Two-Area non-reheat power SYSTEM.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    0
  • Volume: 

    5
  • Issue: 

    4
  • Pages: 

    42-48
Measures: 
  • Citations: 

    2
  • Views: 

    1946
  • Downloads: 

    0
Abstract: 

زمینه و هدف: نواقص حرکتی شامل همی پارزی، عدم هماهنگی و اسپاستیسیته از رایج ترین آسیب های بعد از سکته مغزی هستند. بیشتر بیماران در طی زمان در بعضی از این نواقص بهبود می بابند که البته میزان آن در بیماران مختلف متفاوت می باشد. شواهدی هست که نشان می دهد افزایش شدت و کمیت درمان پس از سکته مغزی می تواند بهبود را افزایش بخشد. توانبخشی حرکتی این بیماران شامل ترکیبی از تکنیک های حرکت درمانی است که در بسیاری از کلینیک های کاردرمانی انجام می گیرد. اما در این روند توانبخشی به امواج مغزی بیماران سکته مغزی و تاثیری که این امواج می تواند بر حرکت داشته باشد توجهی نمی شود. یکی از این امواج تتا می باشد، لذا هدف از انجام این تحقیق بررسی تاثیر همراه کردن کاردرمانی و نوروفیدبک بر درمان حرکتی بیماران سکته مغزی می باشد.روش بررسی: این مطالعه بصورت طرح تک آزمودنی Single-SYSTEM DESIGN (AB) بر روی 2 بیمار سکته مغزی انجام شد. در طی فاز پایه عملکرد اندام فوقانی و تحتانی بیماران (با استفاده از آزمون های فوگل-مایر و برگ)، سه روز در هفته و به مدت 4 هفته مورد ارزیابی قرار گرفته و مداخلات کاردرمانی هم انجام شد. پس از اتمام این دوره فاز درمان آغاز گردید که ترکیبی از کاردرمانی و نوروفیدبک است و مدت آن نیز 4 هفته بود. سپس نتایج ارزیابی های فازهای پایه و درمان مورد تجزیه و تحلیل آماری قرارگرفت.یافته ها: هر دو بیمار بهبودی معنی داری را در عملکرد اندام فوقانی (بیمار 1، 81.1% و بیمار 2، 68.1%) و تحتانی (بیمار 1، 73.1% و بیمار 2، 75.4%) در آزمون فوگل-مایر و برگ (بیمار 1،51.6 % و بیمار 2، 68.1% ) نشان دادند.نتیجه گیری: باتوجه به بهبودی قابل توجه در عملکرد اندام فوقانی و تحتانی بیماران به نظر می رسد همراه کردن نوروفیدبک با درمانهای رایج کاردرمانی، می تواند نتایج بالینی بهتری در بر داشته باشد. اگرچه به مطالعات بیشتر در آینده نیاز است.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2011
  • Volume: 

    5
  • Issue: 

    2
  • Pages: 

    48-53
Measures: 
  • Citations: 

    1
  • Views: 

    1653
  • Downloads: 

    0
Abstract: 

Background AND aim: Sensory deficits after stroke are common with prevalence rates variously reported to be 11% to 85%. In spite of the fact that Sensory deficits can decrease the quality of upper limb's movements AND result in impairments in fine motor manipulation of objects, grasp AND manipulative skills AND finally decrease the patient's quality of life but commonly overlooked in stroke rehabilitation. The aim of this study was to investigate the effects of sensory retraining on upper limb recovery.Materials AND methods: In this study we studied 5 chronic stroke patients were participated using a single-SYSTEM (A-B) DESIGN. During the baseline phase patient' s function AND motor impairment of upper limb were measured by Fugl-Meyer AND Motoricity Index AND their hAND dexterity were measured by Box AND Block test on three days intervals. When Patients reached to a stable pattern of changes, their treatment program began. In this phase they received sensory retraining intervention for 6 weeks. Based on sensory retraining principles AND according to each patient's abilities, intervention began with detection AND localization of constant AND moving touch AND followed by higher discriminatory tasks, such as graphestesia. Then results of evaluations of two phases were analyzed.Results: Four patients showed significant improvements in upper limb function. The data showed significant improvements in motor impairments AND hAND dexterity in all of them.Conclusion: Regarding of significant recovery of upper limb function, motor impairment AND hAND dexterity of patients, sensory retraining can be considered as a practical method in rehabilitation of stroke patients. However further research with larger sample size is needed.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    1386
  • Volume: 

    4
Measures: 
  • Views: 

    910
  • Downloads: 

    0
Abstract: 

پیشرفت سریع تکنولوژی سیستم ها، اعم از تکنولوژی اطلاعات و تکنولوژیهای مربوط به کارایی سیستم، نقش حیاتی در توسعه و پیشرفت کارآمد شرکتها دارد. از آنجایی که شرکت ساعت سازی زمان آوران فاقد سیستم اطلاعات مدیریت می باشد و گردش داده و استخراج اطلاعات به کندی صورت می گیرد و کندی این سیستم مانع بزرگی در راه توسعه شرکت و نیز کارایی و اثر بخشی فعالیتهای این سازمان می باشد، لذا ایجاد سیستم کامپیوتری اطلاعات مدیریت، از اولویت بالایی برخوردار است. با توجه به اهمیت این موضوع تصمیم گرفته شد که سیستم مکانیزه ای برای تمامی بخشهای شرکت طراحی شود. متدلوژی که در طراحی این سیستم استفاده خواهد شد متدلوژی ساخت یافته نوین (روش (RUP می باشد. برای ایجاد چنین سیستمی انجام مراحلی چون، تجزیه و تحلیل سیستم، طراحی، برنامه ریزی و اجرای سیستم باید طی شود. هدف اصلی از ایجاد این سیستم استخراج اطلاعات کمی و کیفی بصورت صحیح، دقیق، مرتبط و به موقع است. در سیستم پیشنهادی مزیتهایی از قبیل سرعت عمل، دقت، اطمینان از نتایج، به روز بودن اطلاعات، کاهش عملیات دستی، جلوگیری از مفقود شدن اطلاعات و کاهش اتلاف زمان وجود دارد.

Yearly Impact:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2017
  • Volume: 

    15
  • Issue: 

    1
  • Pages: 

    21-29
Measures: 
  • Citations: 

    0
  • Views: 

    1564
  • Downloads: 

    0
Abstract: 

This paper presents a new intelligent algorithm, named binary real genetic algorithm (BRGA) to DESIGN parameters of PSS AND STATCOM controller SIMULTANEOUSLY. The proposed algorithm has a strong search capability AND high speed convergence to find the global optimum points. The objective function used in this paper to be minimized is the time integral absolute error (ITAE). The objective will be minimizing the deviations of rotor speed (Dw) AND the voltage of the bus in which STATCOM has been installed. The simulations are carried out on a two-area four-machine power SYSTEM to show the superior performance of the proposed method, when compared with GA AND PSO algorithms.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2021
  • Volume: 

    52
  • Issue: 

    2
  • Pages: 

    145-156
Measures: 
  • Citations: 

    0
  • Views: 

    175
  • Downloads: 

    21
Abstract: 

This study was conducted during summer AND winter of 2018- 2019 in the agricultural research field of Shahid Chamran University. Experimental DESIGN was split- plot based on RCBD with three replications. The main plot was the type of agricultural SYSTEM in three levels including conventional (Conv), organic (Org) AND sustainable (Sust) (integrated between Conv AND Org) AND sup- plot was the type of pre- cultivated crop in sequence with wheat including cultivation of mung bean (M- W), corn (C- W), sesame (S- W) AND fallow (F- W). Yield quantity (yield AND its component) AND quality (grain protein), an estimate of photosynthesis matter transfer index of wheat AND soil organic carbon (SOC) after one double-cropping were measured. The result showed that the highest (545.04 g/m2) AND the lowest (409.28 g/m2) seed yields were obtained in Conv AND Org respectively. In contract, with the changing type of SYSTEM from Conv to Org, grain protein was increased significantly (from 8.3 to 9.6 %). In addition, the highest (535.47 g/m2) yield of wheat was obtained from M- W double cropping. On the other hANDs the highest remobilization AND current photosynthesis matter were obtained in the organic agricultural SYSTEM with M- W AND conventional with M- W double cropping. The situation of SOC showed that the highest (33.18 mg/g) SOC was obtained in the organic agricultural SYSTEM with C- W double cropping. The reason for improving SOC in the organic AND sustainable agricultural SYSTEM was application of organic matter (compost AND vermicompost) AND crop residue management. Totally, from the crop ecology point of view, sustainable agricultural method with a sequence of M- W was the most desirable SYSTEM.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Issue Info: 
  • Year: 

    2024
  • Volume: 

    13
  • Issue: 

    4
  • Pages: 

    119-134
Measures: 
  • Citations: 

    0
  • Views: 

    46
  • Downloads: 

    5
Abstract: 

A B S T R A C T Considering the location of vital centers in the heart of the cities, they are more affected by unexpected events. Hence, due to the probability of the loss of existing services AND devastating effects on the social organization AND the necessity to prepare essential needs of people AND military agencies, planning AND building the storage for essential items as a replacement for the damaged services are considered a critical factor in social AND defensive reliability. This research tries to locate stockpile of essential Items in Mashhad by emphasizing passive defense criteria AND analyzing stockpiles of essential items in terms of form communicational structure. The type of research is applied, AND the research method is in theoretical discussion AND formulation of mental models, descriptive-analytical AND information-gathering methods, documents, questionnaires, AND interviews. Moreover, the information analysis method is with the IHWP model in GIS software in the locating section. In the section on examining architectural patterns AND forms is content analysis. The research results show that 20.61 percent of Mashhad has an optimal location potential, AND 0.94 percent of city also has a favorable potential for location. Also, parts of the north-east AND south of the city have the priority for location. The types of spatial organization of the rectangular form, including centralized, four-armed, introverted, AND diagonal, were investigated in the architecture department. The centralized form is preferable to other forms for its capacity AND access to exits AND spatial organization Extended Abstract Introduction As a stockpile of essential items to facilitate the process of activities AND to achieve goals, the warehouse plays a vital role in creating this flexibility in organizations. In fact, from the point of view of crisis management, the stockpile of essential items can play a significant role in the supply chain to deal with unforeseen internal or external incidents. Passive defense in the stockpile of essential items refers to measures that do not require expensive AND challenging methods AND solutions to protect the stockpile of essential items. Furthermore, it can help avoid the substantial expenses of monitoring the entire inventory AND increasing non-conformities (such as theft, fire, non-conformity in the inventory AND management inspection, fatal accidents, etc.) or reduce this amount. Choosing the form of the stockpile of essential items for essential items with a passive defense approach requires a comprehensive analysis based on defense principles such as hierarchical protection, nationwide coverage, dynamic protection, relative self-sufficiency, AND minimum vulnerability. Therefore, in addition to placing this category of stockpile of essential items in Mashhad, the mentioned research also tries to establish a relationship between architectural forms AND principles of defense to reduce vulnerability AND improve the level of relief in times of crisis.   Methodology The current type of research is applied, AND the research method is descriptive-analytical. In this research, 29 people were interviewed using semi-structured questionnaires AND in-depth interviews with urban AND passive defense experts. The method of data analysis is quantitative AND qualitative. Also, the content analysis method was used to compile AND analyze the architectural forms of the stockpile of essential items of essential items compatible with the principles of passive defense. The fuzzy quantitative model IHWP was exploited in GIS software for placing the stockpile of essential items in the studied sample.   Results AND discussion Locating From the overlaying of 10 indicators, distance from the fault, height of buildings, distance from gas lines, distance from high voltage power lines, road width, building density, risk of uses, distance from water transmission lines, population density, AND lAND prone to liquefaction, location in 10 class was conducted that the first AND second priority is the north-east AND south of Mashhad, which has the most favorable location. In Mashhad, 17.2% of the city area has a very low score, 12.8% low score, 48.37% medium score, 20.61% high score, AND 0.94% very high score regarding location desirability.   Architecture According to the previous studies on geometric forms, the suitable form for warehouse DESIGN is a simple form that does not have frequent breaks AND sharp AND vague points to reduce the spatial deviation. Among the geometrical shapes, square AND rectangular right-cornered shapes meet the criteria of warehouse DESIGN. In the meantime, the rectangle can define joints along its length, each of which is a focal point for concentrating activities AND organizing their performance. Additionally, the internal spaces in this form are reasonably defined, which results in the building's overall form being overshadowed. This also makes the surrounding accesses more targeted AND focused, ultimately providing more suitable relief during times of crisis. In order to create four types of stockpiles of essential items, A (centralized), B (four arms), C (introverted), AND D (polar) were DESIGNed, AND the way of combining these stockpiles of essential items was expressed AND analyzed separately. The research results on accesses AND circulation shows that type A covers a population of over 100,000 people, which has the best performance in terms of access to exits AND spatial organization AND provides services in times of crisis. Therefore, type A, due to the sequence of layers, lines, AND expansion on the surface, has the most functional symmetry with the body of the warehouse, AND its spatial projection is limited to adapt the shell to the body. Visually, it has the least visibility from a high height. Due to its volume AND formal indicators, it has a high level of homogeneity AND camouflage with its surrounding environment.   Conclusion The results of placing stockpiles of essential items in Mashhad showed that the northeast AND south of the city have a higher talent for establishment. According to the examination of geometric forms, the rectangular form has the most efficiency for warehouse DESIGN in the architecture area. Due to formal capabilities such as the value of lines, angles, AND proportions, it has the most efficiency in terms of performance, motion circulation, AND the least spatial deviation. In order to research as mentioned above, after choosing the dominant form of the rectangle, an attempt has been made to analyze the spatial organization of the rectangular form using linear, combined, decomposition, AND combination methods AND centripetal AND radial arrangements in terms of passive defense principles. Furthermore, four different types of warehouse DESIGN were formally analyzed as patterns AND representative types, which are four arms, centralized, introverted, AND diagonal, each of which, in addition to functional capabilities, also covers the population's needs in crisis conditions. Finally, the concentrated type due to the extent of its successive lines AND layers in close proximity to each other, the perceptibility of the surfaces of the body joints because it can be recognized from a high altitude in order not to be identified in times of crisis such as air raid, they have the highest degree of compatibility between function AND form from the point of view of passive defense.   Funding There is no funding support.   Authors’ Contribution All of the authors approved the content of the manuscript AND agreed on all aspects of the work.     Conflict of Interest Authors declared no conflict of interest.   Acknowledgments We are grateful to all the scientific

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Author(s): 

Seyed Mahdi Sajadi Seyed Mahdi Sajadi | Salehi Akbar | Sajadi Seyed Mahdi

Issue Info: 
  • Year: 

    2023
  • Volume: 

    2
  • Issue: 

    71
  • Pages: 

    139-152
Measures: 
  • Citations: 

    0
  • Views: 

    63
  • Downloads: 

    0
Abstract: 

current research is to critically analyze the discourse of world peace in the textbooks of the Iranian educational SYSTEM based on the theory of identification by L& M. For this purpose, the textbooks between the years 1357-1392 (primary period AND first period high school) have been analyzed. This article has been done with the combined method of analyzing the discourse of Fairclough, L &M AND focusing on the following questions: What was the status of the world peace discourse in the educational documents of this era? What subjects are these educational materials trying to create? What role have the dominant political discourses in this era played in shaping the identity of these subjects? The findings show that the discourse of world peace in educational books AND documents has been rejected due to the demarcation between Islamic AND non-Islamic, internal AND external. Power processes have tried to create militant AND vengeful subjects with a military identity. The factor of persuasion of the subjects is the axiomatization of the ideologies of the revolution with an Islamic nature. Also, the educational content by inducing specific defense ideologies has formed pacifist identities in all individual, interpersonal, social AND international dimensions.

Yearly Impact: مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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