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Author(s): 

MOZAFFARI M.R. | GERAMIA J.

Issue Info: 
  • Year: 

    2013
  • Volume: 

    1
  • Issue: 

    1
  • Pages: 

    15-23
Measures: 
  • Citations: 

    0
  • Views: 

    2074
  • Downloads: 

    286
Abstract: 

In this paper, different input-oriented ratio-based DEA (DEA-R-I) models are proposed. By presenting the envelopment-additive-enhanced Russell model based on the DEA-R-I form, each decision making unit is evaluated and its efficiency score is calculated. Also, by presenting the central resource allocation model based on the DEA-R-I form, a suitable benchmark for all DMUs is proposed by solving a linear programming problem. Finally, the efficiency scores obtained for the data of 20 commercial bank branches by each of the proposed models are compared.

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Issue Info: 
  • Year: 

    2023
  • Volume: 

    13
  • Issue: 

    3
  • Pages: 

    89-103
Measures: 
  • Citations: 

    0
  • Views: 

    144
  • Downloads: 

    17
Abstract: 

A B S T R A C T Transformations such as globalization, the contiguity of geographical spaces, as well as developments in the field of military technologies have transformed the issue of defense as the main factor for the survival of countries. Because the transformation from hard to soft war and then the smart war in recent decades has changed the approaches to defense. These transformations have led to the development of discussions about defense purposes. Meanwhile, Middle East countries have a prominent position and importance in terms of defense due to their special conditions. This article has tried to investigate the Basic dimensions affecting the defense of foreign countries with descriptive and analytical methods, using library and field findings and Smart-PLS software. The results of the current research show that the effective components in the current research include 130 items that are placed in the form of 15 dimensions. The importance of these dimensions in defense of the Middle East countries is, respectively, geopolitical dimension with a 0.43 score, military dimension with a 0.41 score, economic dimension with a 0.41 score, political dimension with a 0.39 score, hydrology dimension with a 0.34 score, security dimension with a 0.32 score, social dimension with a 0.29 score, demographic dimension with a 0.28 score, cultural dimension with a 0.26 score, scientific-health dimension with a 0.25 score, geomorphological dimension with a 0.25 score, mathematical dimension with a 0.2 score, climatic dimension with a 0.2 score, biological dimension with a 0.2 score and soil dimension with a 0.18 score. Extended Abstract Introduction Security and defense are among the most vital issues for the preservation and survival of countries. In fact, defense and military affairs are necessary for countries' independence and political, cultural and economic development. Among them, geography and political geography are prominent fields that directly affect defense issues. Actions taken by a country in dimensions (political, military, economic, etc.) in order to maintain security and territorial integrity, guarantee independence and protection of its people against any enemy attack, will organize the geographical (spatial) environment, wise and appropriate distribution of critical places and sensitive centers and infrastructures are identified by taking into account the threats and the correct use of environmental capacities in political, economic, social, cultural, etc. dimensions, and as a result, it can lead to stability and stability in the country's geographical space. The design of defense planning model according to the economic, cultural, political and environmental features in the new era when countries are facing external and internal threats as a sub-branch of territorial planning has received the attention and importance of officials and governance systems in order to be able to reduce these threats with accurate and systematic planning in the geographical space, defense planning is not separate from the flow of national and regional planning. It is important to pay attention to it based on the type and amount of external and internal threats to governance. Due to the expansion of the security circle, the government is not only responsible for creating military security. However, it must also exercise part of its authority in the direction of territorial management. On the other hand, there has been a transformation in the form of threats and wars based on changes and the movement from hard to soft war and finally, smart war is the basis for reviewing and recognizing the components that can be used in defense of countries, including the Middle East countries, have a prominent position and importance. Despite the internal differences between countries, the Middle East has commonalities and connections that can directly affect the overall defense of this geographical space.   Methodology In terms of type and purpose, the current research is fundamentally applied. Also, it is descriptive and analytical in terms of nature. This research, in addition to the correct and realistic depiction of the defense situation of the Middle East countries, it is tried to provide a suitable model for the defense of the countries. The sources used in the current research are library and field sources (questionnaires). According to the subject of the current research, the statistical population of this research is a collection of people, experts and elites who have sufficient knowledge, experience and expertise regarding the research topic, which is the design of the defense model, according to the nature of the Delphi pattern model, at least the statistical population based on the sources should be between twenty and fifty people to reach statistical saturation. The number of selected samples included 51 people who were identified in the form of a non-random sampling pattern and introduced as a statistical sample in the framework of the Delphi model. Due to the qualitative nature of this research, it has been tried to use the Delphi model in the framework of the targeted non-random model. Therefore, based on these cases, the current research has selected the maximum statistical population of 51 elites, experts, and opinionated people in this field. In this research, to evaluate the research hypotheses in the form of the hardness equations model, the partial least squares method and the SMART-PLS software, which is a variance-based path modeling technique and provides the possibility of checking the theory and metrics simultaneously, have been exerted.   Results and discussion In this research, approaches such as political, military, cultural, etc., in the field of land use have been discussed. In the meantime, the defense of countries as an emerging approach is significant. According to the developments in geographical spaces, such as the evolution of military-defense technologies, the connection of geographical spaces to each other and most importantly, the movement from hard and soft war to smart war has witnessed a transformation and wide attention in a way that countries are suited to these developments are trying to prepare the geographical space of their country in terms of defense. Therefore, the defense planning of the Middle East countries as a geographical region has great importance from a geopolitical and strategic point of view, which indicates that the countries of this region face threats and complex defense-security issues in different ways.   Conclusion The results of the present research show that the defense planning in developing countries should be considered according to their characteristics, considering all 15 dimensions, which include 130 components. In the design of the defense planning of these countries, attention should be paid to the weight and importance of the shaping dimensions. In general, it can be said that the defense planning of the Middle East countries is proportional to the geographical features of these countries and on the other hand, considering the developments in the field of threats and moving from hard to smart war, 15 dimensions should be considered for the defense of these countries.   Funding There is no funding support.   Authors’ Contribution Authors contributed equally to the conceptualization and writing of the article. All of the authors approved thecontent of the manuscript and agreed on all aspects of the work declaration of competing interest none.   Conflict of Interest Authors declared no conflict of interest.   Acknowledgments  We are grateful to all the scientific consultants of this paper.

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Issue Info: 
  • Year: 

    2020
  • Volume: 

    8
  • Issue: 

    1
  • Pages: 

    1-9
Measures: 
  • Citations: 

    0
  • Views: 

    195
  • Downloads: 

    185
Abstract: 

Objectives: Maternal mortality reduction is a key international sustainable development goal. Although maternal mortality ratio (MMR) has changed in the Eastern Mediterranean Region, the trend of maternal deaths in the countries of the region is important. This review article provided the current situation and trend of MMR in the Eastern Mediterranean region between 1990 and 2015. Materials and Methods: In this review, country profiles and data were obtained through UNDPA, UNICEF, UNDP, WHO, and World Bank websites. Then, a literature search was performed in PubMed, Science Direct, Scopus, and Google Scholar in this regard. Results: Based on the collected data, 36 out of 66 studies met the required criteria and were chosen for analysis. All countries of this region showed a downward trend between 1990 and 2015, and this change varied from 16. 30% in Yemen to 76. 56% in Lebanon. The maternal mortality reduction was 69. 88% in Iran in the same time. Conclusions: Although all countries of the Eastern Mediterranean Region demonstrated a downward trend in MMR, this trend was not the same in all countries. Thus, it is needed to boost regional efforts to further reduce MMR and achieve sustainable development goals by 2030.

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Issue Info: 
  • Year: 

    1995
  • Volume: 

    52
  • Issue: 

    -
  • Pages: 

    429-430
Measures: 
  • Citations: 

    1
  • Views: 

    131
  • Downloads: 

    0
Keywords: 
Abstract: 

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Author(s): 

Hoseini S. | Zandvakili A.

Issue Info: 
  • Year: 

    2021
  • Volume: 

    9
  • Issue: 

    2
  • Pages: 

    121-134
Measures: 
  • Citations: 

    0
  • Views: 

    152
  • Downloads: 

    24
Abstract: 

Complex networks are currently being studied in many fields of science, and many natural systems can be described by them. The Internet and the brain, which are networks of routers and neurons, respectively, are examples of complex networks. There are also different types of complex networks, which can be referred to as scale free networks, small world networks and random networks. In this paper, an epidemic model of rumor spread in all three types of these networks is proposed. In this model, in addition to the existing cases (susceptible-infected-recovered), the rumor delay mechanism as well as the counter-attack mechanism have been added. The proposed model is presented as: Susceptible-Infected-Infected-Counterattack-Recovered-Susceptible (SECIRS). The methods of diffusion and decontamination for these three types of networks are compared. The simulation results are exactly in line with the theoretical analysis and show that in scale free networks, the spread of pollution is faster than the other two types. Pollution is lower and decontamination is faster.

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Issue Info: 
  • Year: 

    2008
  • Volume: 

    7
  • Issue: 

    23
  • Pages: 

    266-271
Measures: 
  • Citations: 

    0
  • Views: 

    961
  • Downloads: 

    173
Abstract: 

Introduction: Clinical use of the late responses during routine neurophysiological examination has significantly increased the diagnostic yield of the neurophysiological evaluation. The H max to M max ratio (H/M ratio) is considered a suitable index for illustrating the level of reflex excitability of the motor pool.Methods: In this study posterior tibial nerve H/M ratio changes in cerebrovascular accidents (CVA) evaluated. This investigation was carried out in 22 normal subjects aged 40-65 years with mean 52 years, and in 40 patients with CVA aged 42-63 years with mean 57 years.Results: In normal subjects no significant differences were found between the mean values observed between right and left sides. In patients significant increased H/M ratios in both sides with more in non-plegic leg (P<0.01) were found. The facilitation of Babinsky sign in patients is significantly associated with low H/M ratios (P=0.003). The H/M ratio changes were not significantly associated with severity of hemiplegia (P=0.3 for lower extremities, P=0.9 for upper extremities). The H/M ratio was increased in ischemic lesions (P<0.01), but in intracerebral hemorrhages the soleus H/M ratio increases in non-plegic side the same as the plegic side.Conclusion: The posterior tibial nerve H/M ratios are increased in CVA bilaterally due to decreased presynaptic inhibition Ia terminals, thus amplitude of H reflexes increased without increased amplitude of M response.

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Author(s): 

MEHRDAD K.

Issue Info: 
  • Year: 

    2001
  • Volume: 

    19
  • Issue: 

    3
  • Pages: 

    323-325
Measures: 
  • Citations: 

    1
  • Views: 

    4716
  • Downloads: 

    0
Abstract: 

The method of selection of the study design decides the type of analysis 10 be used. Case-Control studies assess the causes of a particular outcome, comparing a group of individuals who have experienced the outcome under study with a group who have net.Results appear as a two by two table. As these two groups are sampled separately, the rate of the disease in the exposed or unexposed groups can not be calculated. However, the Odds ratio can be obtained. The Odds ratio is sometimes referred to as the cross product ratio.                        Cases                            Controls Exposed            a                                  b Unexposed         c                                  d Odds ratio (a/b)I (c/d) = ad/bc

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Author(s): 

Asadi Elham | Hosseini Soodeh

Issue Info: 
  • Year: 

    2024
  • Volume: 

    22
  • Issue: 

    79
  • Pages: 

    17-28
Measures: 
  • Citations: 

    0
  • Views: 

    33
  • Downloads: 

    0
Abstract: 

In recent years, the Internet has become part of the requirements of human life. With the widespread use of the Internet, the Web, and online social networks, the number of vulnerabilities and security threats has increased significantly. Various types of malwares (worms and viruses) have become a major threat to the security of systems and networks. In this regard, researchers are looking for ways to identify malware and fight against them. One of the methods used in this field is to model the malware propagation in order to identify and combat malware by modeling its behavior. In this article, a malware propagation model based on the propagation of epidemic diseases in a heterogeneous network structure, considering the devices connected to the network and the Internet, is introduced. Modeling is done based on the Susceptible-Exposed-Infected-Recovered epidemic model for devices and Internet networks. The results show that the speed of malware propagation in the proposed HD-SEIRS model is significantly reduced compared to the SEIR model. Also, in this article, the Basic reproduction ratio (R_0 )  is calculated for the proposed model and the effect of parameter changes on the proposed model is investigated.

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Issue Info: 
  • Year: 

    1380
  • Volume: 

    9
  • Issue: 

    1
  • Pages: 

    76-81
Measures: 
  • Citations: 

    0
  • Views: 

    798
  • Downloads: 

    0
Abstract: 

سندرم تونل کارپ شایعترین نوروپاتی فشاری است که به دلیل فشرده شدن عصب مدیان در داخل تونل کارپ در مچ دست ایجاد می شود. تشخیص زودهنگام و درمان مناسب مانع پیشرفت بیماری و از عوارض آن جلوگیری می کند. استفاده از نوار عصب برای تشخیص این بیماری یک روش شناخته شده است. در این مطالعه روشی حساس برای تشخیص زود هنگام CTS مورد بررسی قرار گرفته است. در این روش، میزان تاخیر زمانی عصب حسی مدیان در کف دست (Palm Latency) با فاصله 7 سانتیمتر و میزان تاخیر زمانی آن در مچ دست (Wrist Latency) با فاصله 14 سانتیمتر از انگشت میانی در 50 فرد سالم و 30 دست مبتلا به CTS تعیین گردید. پس از محاسبه (Palm Latency/ Wrist Latency) P/W ratio این نسبت در دو گروه کنترل و بیمار مقایسه گردید. P/W ratio به طور متوسط با احتساب دو انحراف معیار معادل 55%±5% محاسبه گردید. اما این نسبت در بیماران مبتلا به CTS کمتر از 50% می باشد (P<0.05). طبق نتایج به دست آمده از تحقیق، اگر تاخیر زمانی عصب حسی مدیان از فاصله 14 سانتیمتر در مچ دست، بیش از 2 برابر تاخیر زمانی آن از فاصله 7 سانتیمتر در کف دست باشد، به نفع وجود CTS است. این روش برای یافتن موارد خفیف بیماری CTS که تاخیر زمانی از فاصله 14 سانتیمتر طبیعی می باشد. اما بیمار علائم CTS دارد، می تواند ارزشمند باشد.

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Issue Info: 
  • Year: 

    2014
  • Volume: 

    16
  • Issue: 

    2 (62)
  • Pages: 

    111-116
Measures: 
  • Citations: 

    0
  • Views: 

    394
  • Downloads: 

    265
Abstract: 

Objective: Zanjani viper (Vipera albicornuta) is an endemic venomous snake in East Azerbaijan Province, Iran which is medically important due to its application for antivenin production in the laboratory. We need to produce this snake in captivity. This study was conducted to characterize mature male Zanjani viper and to evaluate its sperm reproductive parameters.Materials and Methods: This applied- descriptive study was conducted on twenty Zanjani viper samples collected from Ag Dag Mountain in East Azarbaijan Province, Iran, between September and October 2010. After the snakes were anesthetized and sacrificed humanly, their morphometric specifications and sperm reproductive parameters, including concentration, motility, vitality, morphology, and survival time, were measured.Results: Morphometric specifications and evaluation of sperms of the snake showed the following information: Zanjani male viper, body length of 73.65±4.35 cm, tail length of 5.465±0.48 cm, and mature snakes with testicular volumes of 0.61±0.81 ml (right) and of 0.46±0.17 ml (left). Our findings revealed average sperm concentration of 0.47±0.1´106 ml-1, motility of 49-55 %, vitality of 46.11±9.63 %, normal morphology of 61.71±5.3%, and survival time of 6±2 hours at the laboratory temperature. Statistical analyses were performed using Student’s t test for comparison of two values, and one-way ANOVA was applied where three values were compared.Conclusion: Results suggest that mature Zanjani male viper with mature sperms in its vas deferens is present in late summer and early autumn seasons in Bostanabad County, Iran.

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