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Issue Info: 
  • Year: 

    2024
  • Volume: 

    13
  • Issue: 

    4
  • Pages: 

    119-134
Measures: 
  • Citations: 

    0
  • Views: 

    49
  • 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): 

MEHRDAD S.

Issue Info: 
  • Year: 

    2001
  • Volume: 

    19
  • Issue: 

    2
  • Pages: 

    185-194
Measures: 
  • Citations: 

    1
  • Views: 

    759
  • Downloads: 

    0
Abstract: 

There are different terms in use for different typs of medical study designs and trials.Translating these terms in to Farsi, needs special care avoiding misinterpretations This article asks medical investigators attention to focus on the real features of different concepts.The main study designs such as surveys, case-control, cohort and interventional trials are discussed briefly. At the end suggestions are made in choosing the right analysis for each design appropriately. Their major strengths and weaknesses are also mentioned.

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: 

    172
  • 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: 

    7
  • Issue: 

    2
  • Pages: 

    55-78
Measures: 
  • Citations: 

    0
  • Views: 

    186
  • Downloads: 

    19
Abstract: 

Purpose: The science of interpretation, as the most important science responsible for understanding the Qur'an, needs to be methodized and updated so that the teachings of the Qur'an can be used easily for all classes of people. In the present study, the meaning of "future research in interpretation" is the ability to create desirable models for more efficient interpretation in the future, by using scientific tools, creativity and relying on the foundations and rules of interpretation and compensating the damages of interpretation in the past.Method: This research, with descriptive analytical method, answers the question, what are the fields and requirements of future research in interpretation? Findings: The results of the current research are based on the fact that special attention to the Qur'an, as the most important source of interpretation, rationality and methodical consideration in interpretation, attention to the prerequisites of interpretation, interpretation based on the requirements of the time, the need to pay attention to thematic interpretation, studying on the history of interpretation and observing the manners and conditions of interpretation are one of the most important requirements of interpretation in the future. Results: Considering the developments that will take place in the field of knowledge, methods and expectations from science in the future, the interpretation will also change. For this reason, in order not to cause various damages to the interpretation of the Qur'an, it is necessary to pay attention to the various contexts, principles and requirements of the interpretation of the Qur'anic commentators and scholars.

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: 

    13
  • Issue: 

    1
  • Pages: 

    167-197
Measures: 
  • Citations: 

    0
  • Views: 

    229
  • Downloads: 

    18
Abstract: 

In the present study, the main purpose is the qualitative study on garbage collection in Tehran city. It has been done by qualitative research method. Semi-structured interview and purposeful sampling techniques were used in data collection. To do this, 15 people were interviewed and the sample size in the present study was determined based on theoretical saturation. Thematic analysis was used to analyze the data. Theme analysis was performed at 4 levels of primary, main, central and core themes. A total of 184 initial themes were extracted from all interviews. In the main coding stage, the following 9 main themes were merged. Escape from poverty in the origin and the inevitable choice of inferiority, society's view to garbage collectors, and high stress, strengthening the cycle of academic reluctance and illiteracy, physical and mental torment, unknown horizon and confusion of the Khojies, legal ambiguity and customary definitions and contracts, complaints from relevant institutions, the entry of the mafia and the formation of rent and corruption. Finally, these themes fall into two categories of social harmfulness of recycling and institutional exclusion and illegallity of the status of garbage collectors in the second distrect in the form of the core theme of the structure of socially harmful and institutionally illegal, waste phenomenon explained..

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: 

    11
  • Issue: 

    1
  • Pages: 

    41-48
Measures: 
  • Citations: 

    0
  • Views: 

    64
  • Downloads: 

    0
Keywords: 
Abstract: 

One of the issues of reliable performance in the power grid is the existence of electromechanical oscillations between interconnected generators. The number of generators participating in each electromechanical oscillation mode and the frequency oscillation depends on the structure and function of the power grid. In this paper, to improve the transient nature of the network and damping electromechanical fluctuations, a decentralized robust adaptive control method based on dynamic programming has been used to design a stabilizing power system and a complementary static var compensator (SVC) controller. By applying a single line to ground fault in the network, the robustness of the designed control systems is demonstrated. Also, the simulation results of the method used in this paper are compared with controllers whose parameters are adjusted using the PSO algorithm. The simulation results show the superiority of the decentralized robust adaptive control method based on dynamic programming for the stabilizing design of the power system and the complementary SVC controller. The performance of the control method is tested using the IEEE 16-machine, 68-bus, 5-area is verified with time domain simulation.

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

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Author(s): 

قدیانی لیلا

Issue Info: 
  • Year: 

    1382
  • Volume: 

    3
  • Issue: 

    (ویژه نامه 10)
  • Pages: 

    56-56
Measures: 
  • Citations: 

    0
  • Views: 

    1671
  • Downloads: 

    0
Abstract: 

مقدمه و هدف: در این مقاله دو روش آموزشی تحت عناوین Case Study ,Case Method به عنوان تکنیکهای آموزشی مورد بررسی و نقد قرار گرفته و تفاوتها و شباهتهای هر کدام به طور جداگانه بررسی شده است و نکات کاربردی هر روش در آموزش پرستاری مورد بحث قرار گرفته است.مرور مطالعات: در این مقاله ابتدا تعاریف دو نوع متد آموزشی ارایه گردیده و سپس موارد استفاده از هر متد به طور جداگانه بحث شده است، و با توجه به ماهیت آموزش پرستاری ایران پیشنهادات کاربردی در این زمینه ارایه شده است. Case Method در گروههای آموزشی کوچکتر که مشاهدات ذهنی کمتری دارند و در ابتدای تجربه می باشند استفاده می شود. ولی Case Study در گروههای آموزشی بزرگتر که مشاهدات ذهنی بیشتری دارند و قدرت تجزیه و ترکیب و رشد بحث در آنها بیشتر می باشد استفاده می شود. از ویژگیهای مهم آنها می توان به افزایش قدرت تصمیم گیری افراد در موقعیتهای مختلف، لذتبخش تر کردن آموزش و علاقمند کردن به امر تدریس و ... نام برد.بحث و نتیجه گیری: با توجه به یافته های پژوهش و با توجه به محتوی برنامه های آموزشی پرستاری، محقق استفاده از روشهای Case Study ,Case Method را برای دانشجویان پرستاری توصیه می نماید. زیرا بهترین آموزش یادگیرنده ها زمانی مطرح می باشد که دانش هماهنگ و متنوع مهارتهای آموزشی با تجربیات در کنار هم می باشد.

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: 

    182
  • 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: 

    2003
  • Volume: 

    -
  • Issue: 

    17
  • Pages: 

    119-196
Measures: 
  • Citations: 

    3
  • Views: 

    1081
  • Downloads: 

    0
Abstract: 

Juniper is the most important native conifer in Iran. Juniper as one of the most resistant tree species to extreme conditions, frost (up to -40°C) and drought, plays important role in mountainous regions of Iran. In this study, by investigation on qualitative and quantitative characteristics of essential oils ofleaves and berries (female cones), the effects of environmental factors were studied on metabolism of secondary products. The volatitale constituents of the Leaves and berries of male, female and male-female trees isolated by steam-distillation were analyzed by GC-MS.Results indicated that the amount of essential oil in berries is higher than that in leaves. Seasonal alteration of essential oil of berries differs from leaves. The essential oil of berries increase during growth period, however decreased in leaves. Besides drying has increasing effect on essential oil. In total 32 terpenoidic components were found that a-pinene, limonene, trans-verbenol, cisverbenol, verbenone, g- elemone and elemol were the important ones. a-pinene up to 70% of essential oil content was the highest component. Seasonal alteration of each component was very variable.Drying effect can be valuable for isolation of components and commercial applications.

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

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Journal: 

WATER AND WASTEWATER

Issue Info: 
  • Year: 

    2024
  • Volume: 

    35
  • Issue: 

    1
  • Pages: 

    40-57
Measures: 
  • Citations: 

    0
  • Views: 

    52
  • Downloads: 

    21
Abstract: 

It is more important to improve and complete the wastewater process in order to reuse and return it to the production line. In this study, the hydrogen peroxide/ozone process (Peroxone) was investigated as a supplementary step in paper mill wastewater treatment to reduce the amount of chemical oxygen demand and remove E. coli. In this regard, using the Box-Behnken Design method based on the response surface method to optimize and investigate the effect of three variables governing the ozonation process, including the amount of hydrogen peroxide consumed (ml), the amount of ozone input (mg/min) and ozonation time (min) were used. The results showed that the amount of ozone and hydrogen peroxide had the greatest effect for reducing COD (up to about 75%). Also, all three variables have played a significant role in increasing the efficiency of the Peroxone process and even completely eliminating E. coli. In determining the optimal conditions, the amount of ozone (146 mg/min), the amount of hydrogen peroxide (2ml) and the duration of ozonation (23 min), the lowest amount of residual COD (73 mg/L) and the highest efficiency (75% removal of E. coli) are predicted. The results showed that due to the interaction of ozone and hydrogen peroxide, the peroxone process performance was less efficient than the ozonation process alone.

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

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