Showing 27 results for Heidary
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
The issue of climate change and its associated water security challenges has become a growing concern for Iran, particularly in its agricultural sector. Increasing population, rising demand for agricultural products, and the need for food security exacerbate these challenges. This study highlights the risks posed by reduced precipitation, rising temperatures, and inefficient water management practices, including heavy reliance on groundwater and outdated irrigation systems. It emphasizes the urgent need for modern irrigation technologies, such as water recycling (NEWater), and robust governance reforms to improve water use efficiency, analyzed through the HES framework. The study concludes that adopting a comprehensive, long-term strategy, incorporating technological innovations, localized water management practices, and enhanced governance, can mitigate the impacts of climate change and ensure the sustainable use of water resources in Iran's agricultural sector.
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
Microcredit plays a vital role in the food security of rural households. However, to the best of our knowledge, the effects of microcredit on improving the food security of households have not yet been well studied and understood in Iran. Therefore, this study aims to investigate the success of microcredit programs on enhancing the food security of rural households in Zehak county using the propensity score matching method and bootstrap algorithm. For this purpose, two food security indices, including the Household Food Insecurity Access Scale (HFIAS) and the Food Consumption Score (FCS), are used. The results revealed that 100% of the households face food insecurity. The prevalence of food insecurity was 20.0%, 42.5%, and 37.5% for mild, moderate, and severe food insecurity, respectively. In addition, 30% of households are in poor status of food consumption. Our findings emphasize the positive and significant role of microcredit in improving food security. The results showed that microcredit decreased the HFIAS index of the recipient households by 24.31-27.81% and increased the FCS index by 25.87-31.45%. Therefore, policy-makers and decision-makers should promote and strengthen governmental and non-governmental organizations providing microcredit. It is also recommended to provide information and reduce collateral restrictions to increase households' access to microcredit.
Volume 4, Issue 7 (Spring & Summer 2017)
Abstract
The single-use vocabulary in comparison to other vocabulary in the Holy Qur'an requires more precision in translating, because there are no other explanatory options in other verses and this lack of the same verse has made it difficult for them to translate. The verb "Nashata" is one of the single-use vocabulary in the Holy Qur'an mentioned only in verse 2 of the surah "Nazeaat". It seems that the translators in dealing with this word have been made different types of translations and have different voices.The present paper aims at analyzing the data and choosing the best translation, by classifying the approaches of translators and analyzing the Qur'anic data, to examine and critique the semantic forms presented by them to answer finally to this question that which translation is eventually has more credibility and is more reliable?
The result of this study is as follows: The translators have used three methods (literal, loyal and interpretive) in the translation of this verse, but, in fact, no one has been succeeded in complying with all the rules contained in the truth of the word, and consequently, it is necessary to present a corresponding meaning to the truth of the word.
Volume 6, Issue 4 (Fall 2018)
Abstract
Introduction: Soil water repellency was first reported in the first half of the 20
th century for peat soils. Depending on the severity of water repellency, a water repellent soil will resist water penetration during seconds to hours or even days. This has detrimental effects on surface and subsurface flow processes such as increased runoff, erosion, and preferential flow. The present study was conducted with the aim of investigating the effects of Soil water repellency on hydrological and erosion processes in order to identify gaps in the existing investigations.
Conclusion: Major survey gaps remained, including the dissociation of the symptoms of water repellency on soil erosion such as the existence of a soil crust and little knowledge of the temporal patterns of water repellency and their hydrological outcomes. Understanding the mechanisms of water repellency is relevant to the separation of different causal chains as well as the adjust runoff coefficients in different water repellency areas. Soil water repellency can be caused by a variety of compounds and processes and generally occurs after a period of drying weather. Under such conditions, the soil can change from a wettable to a water-repellent state when dried below its critical soil water content. Soil water repellency is found to occur in different soils worldwide, ranging from coarse to fine-textured. Water repellency in soils can result in losses of plant-available water, reduced agricultural crop production, and deterioration of turf quality on sports fields.
Volume 7, Issue 1 (Winter 2021)
Abstract
Background: Acinetobacter baumannii is a gram-negative pathogen that is highly resistant to antibiotics. This bacterium can cause severe systemic infections, especially in hospitalized patients. Recently, antimicrobial-resistant Acinetobacter baumannii has become a life-threatening pathogen in Iran and around the world.
Materials & Methods: In this study, several Iranian and English databases were systematically searched to find all original and review articles investigating the prevalence of imipenem resistance in their sample size, while mentioning the source of clinical isolates, as well as the prevalence of antimicrobial resistance genes.
Findings: Among genes, blaOXA-23 with a prevalence of 31% to 100% was responsible for global outbreaks of imipenem-resistant Acinetobacter baumannii and was presented in most of the hospital isolates. Our meta-analysis also revealed that 74.2% of Acinetobacter baumannii were resistant to imipenem in 122 clinical studies.
Conclusion: Our study highlighted a rapid increase in the rate of imipenem resistance in clinical isolates of Acinetobacter baumannii in Iran. The need for periodic antibiotic care system programs to monitor the administration and use of antibiotics
Volume 7, Issue 13 (Spring & Summer 2020)
Abstract
Different attitudes in to the subject of translation have led to appearance of several topics in its extent, each of which has expanded the science of translation in different points of view and provided the grounds for its conversion into a separate field, entitled "translation studies". Among the many topics in this field, this article reviews the history of translation of the Holy Quran in terms of distinguishing between viewpoint and theory. In this regard, the issue of research is: what kind of view on the matter of translation is shown in the historical course of translation of the Qur'an? Studies on the evolution of the history of translations from the beginning of Islamic history to contemporary era, especially in Persian translations of the Holy Quran, shows that according to the definition of "translation theory", what happened in the history of translation of the Qur'an is more view pointing rather than a theoretical perspective. Of course, the existence of some successful theorizing in the historical course of the translation of Quran cannot and should not be ignored.
Volume 9, Issue 3 (fall 2021)
Abstract
Critical realism,as a branch of the literary school of realism,seeks to convey objective and accurate experiences of reality to the reader by looking at the social problems of man in the new age,and to criticize the prevailing situation in society with a reformist attitude. Samuel Shimon In his first novel,“An Iraqi in Paris”,was able to gain a special place in the field of fiction in Arabic literature;Reza Ghasemi is one of the most prominent novelists of Persian literature that wrote the novel“Nocturnal Harmony”.Both novels reflect the realities of their society and the phenomenon of migration.The purpose of this study is investigate the harmful challenges of the migration phenomenon.In this research,by examining the components of immigration literature from the perspective of critical realism based on description and analysis in the context of the American comparative school, two novels are examined.The results of the research show:Doubt in the basis of insider culture and cultural contradiction in the novel"Nocturnal Harmony"is more prominent than the novel"An Iraqi in Paris" but this is manifested in both novels in the form of alienation.In both novels, critically reviewing the past,while criticizing the political and social conditions prevailing in their society,the way of teaching some religious and cultural teachings has also been criticized.The challenges of immigration are manifested in both novels in the form of disappearance,identity crisis, homelessness and insecurity,but the author has a positive view of the future in the novel"An Iraqi in Paris",but in the novel" Nocturnal Harmony"the authorchr('39')s view is hopeless.
Volume 10, Issue 1 (spring 2022)
Abstract
The mythological analysis of the roles of the heroes in the stories reveals new facts about the human institution and its interests and aspirations. The heroine in the form of a mythical representation is one of the most important types of mythological cognition in ancient societies of maternal descent, which is of great value in historical, literary, psychological and mythological research. In this article, the importance of women and their special role in the formation of mythological narratives as well as its connection with the structures of nature, ie water, soil, plants and trees ... are criticized. The purpose of this study is to study, critique and analyze the mythology of the heroine in two mythical narratives of Tiamat, Marduk, Shahnavaz, Arnavaz and Fereydoun based on Raglen theory. In this article, the authors have tried to deal with the mythical critique and comparative interpretation of the archetype of the heroine in two mythological narratives "Tiamat-Marduk" and "Shahnaz-Arnavaz and Fereydoun" and also to point out the common connection between these two narratives with the structures of nature The following results indicate that in both narrations, the female heroes: Tiamat in the myths of Mesopotamia and Shahnaz and Arnavaz in the myths of Iran are the gods of water and in fact the eternal mothers from whom the creation of all living beings takes place. The role of the male god in the form of Fereydoun and Marduk has a lesser appearance. What is tangible and visible in both narrations
Volume 10, Issue 3 (6-2021)
Abstract
The previous works have addressed selecting the nozzle to minimize the hazard of pesticide drift by producing large spray droplet sizes. However, this spray application with the largest sizes does not effectively impact insects either, as it needs many pesticides. Several studies have demonstrated that the small spray droplet sizes can affect the insects and be obtained by selecting the appropriate nozzle size and height. This study sheds light on the nozzle sizes and heights, and insecticide types for controlling the cabbage aphid to ensure efficient insect control. Different parameters including three sizes of flat fan nozzle 01, 02, and 03, two nozzle heights 35 and 70 cm above the plant top, and two insecticide types 20% wide plus WP and 90% methomyl SP were investigated to measure spray deposition, coverage percentage, and droplets density in different locations of the cabbage plant for improving control efficacy. The outcomes showed significant differences in the spray deposition and coverage percentage using different nozzle sizes, nozzle heights, and insecticide types. The best spray deposition, coverage percentage, and control efficacy (0.321 µm.cm-2, 15.05%, and 84.83%, respectively) were achieved using the 02 nozzle size, nozzle height of 35 cm methomyl SP insecticide type on the fourteenth day after spraying application in comparison to the others. The fourteenth day was the most effective to control aphids compared to the first and the seventh days.
Volume 10, Issue 4 (11-2021)
Abstract
The carob moth, Ectomyelois ceratoniae (Zeller, 1839), is the most critical pest of pomegranate in Iran. The sex pheromone components emitted by the virgin females were characterized by headspace solid-phase
microextraction (HS-SPME) and subsequently analyzed by gas chromatography/mass spectrometry (GC-MS). In this research, the level of individual variation in the female sex pheromone composition of the pest was studied. By extracting pheromone glands of females from different locations, the primary component, (
Z, E)-9, 11, 13-tetradecatrienal, and minor components, (
Z, E)-9, 11-tetradecadienal and (
Z)-9-tetradecenal, were identified. The following ratios were 10: 2.5: 2.1 (trienal: dienal: monoenal) in Kuhdasht,
10: 1.3: 0.7 in Tarom, 10: 1.3: 0.5 in Bajestan, 10: 1.2: 1 in Sorkheh, 10: 1.1: 0.9 in Ferdows, 10: 0.9: 1 in Neyriz, 10: 0.9: 0.9 in Khash and Meybod, 10: 0.9: 1.4 in Saveh, 10: 0.5: 1 in Behshahr, and 10: 0.45: 0.43 in Shahrreza. There was also a significant variation among the populations in response to wind tunnels and field tests. The discrepancies in these ratios show a possibility of a conspecific relationship among carob moth species in Iran. Findings led to a conclusion of
the monomorphic variation in sexual communication of the species.
Volume 11, Issue 2 (3-2020)
Abstract
According to the studies conducted by western archaeologists in a number of plains in Iran such as Doroodzan and Shahabad Plains, they have estimated population of the nuclear villages in the above plains between 100 and 150 people per hectare. This estimation is mostly related to large sedimentary plains with agricultural and animal husbandry livelihood. It seems, the condition in highland is different with those villages in lowlands due to differences in their lifestyle. Accordingly, Laran County, which is located in the highland with nomadic lifestyle and animal husbandry, was studied to estimate its population in each period and assess its population changes during long period. By applying Descriptive-Analytical and statistical methods such as SPSS, it was attempted to have a better understanding of the population changes. To estimate population of the area, population census of the modern day villages during year 2012 and ethno-archaeological activities such as study of 21 modern campsites were applied in this study. Finally, it was estimated that each person occupies 5/6 sq. m in village houses and 6/5 sq. m in campsites. Consequently, based on our studies in village houses and surrounding areas, it seems 51 persons are living in each hectare. For campsites, which are located close to the village houses, it was estimated to 27 persons per hectare. Then the prehistoric population of Laran County was estimated in both site and region scales.
Volume 11, Issue 4 (winter 2023)
Abstract
The notion of the ideal city is a seductive vista, beckoning from the realm of aspirations and dreams. It stands as a realm untouched by pain, suffering, or illness a symbol of a flawless and utopian reality. In contemporary poetry, poets often turn to the imagery of this ideal city within their verses, seeking solace from the tribulations and yearnings of their time. This research, employing an analytical-comparative approach, delves into the conceptual origins of the ideal city within the poetry of Fadavi Taqvan and Zhaleh Esfahani, following a brief exploration of their life narratives. The study aims to unravel the shared themes and distinctive nuances embedded in their poetic renderings.This research holds significant value as it pioneers a comprehensive exploration of the ideal city concept within the works of these two female poets. Such an in-depth comparative analysis has been notably absent in existing scholarly pursuits. A key revelation of this study is the tendency of both Fadavi Taqvan and Zhaleh Esfahani to seek refuge in the ideal city through select verses, allowing them to transcend political challenges and personal tribulations. Their poetry breathes life into this utopian city, framing it within contexts such as revisiting childhood, reminiscing about ancestral lands, experiencing absolute tranquility and envisioning a dreamlike homeland.
Volume 13, Issue 1 (6-2023)
Abstract
A new trend in human resources, especially in the last decade, is the issue of digital talent. This event is certainly influenced by the evolution of the digital economy and the effects that digital technologies such as artificial intelligence have left on the business environment. As little research has been done on digital talent, there is still insufficient knowledge on what digital talent is and what to do about it. Therefore, this study, as one of the earliest studies in the field of digital talent, has investigated this issue in the banking industry. The research approach in this study is grounded theory. Data were obtained through interviews. At the end of the research, the extraction of 326 common first-order open source codes (out of 434 first-order codes), 72 second-order open source codes (resulting from common open source coding), 24 axial categories and 5 selective categories including: Philosophical and organizational orientations of digital business; Cognitive mapping of digital talent based on digitization initiatives; Recognize situational patterns and perspectives with the aim of understanding environmental events; Orientations of strategic actions in the development of DTs; And improved the level of individual and organizational performance.
Navid Zarif Karimi, Hossin Heidary, Mahdi Ahmadi Najafabadi, A Rahimi, Mehdi Farajpur,
Volume 13, Issue 15 (Third Special Issue 2014)
Abstract
Drilling of composite materials is one of the major processes in the manufacturing and assembly of sub-component. However, drilling of composite laminates can cause several damages such as degradation in residual tensile strength. In this study, effects of cutting speed, feed rate and drill angle on residual tensile strength of drilled laminates has been investigated. For this purpose, the Taguchi method was employed for three factors at three levels. Acoustic emission signals and wavelet analysis are used to monitor residual tensile strength. The experimental results indicated that the feed rate has the most significant effect. Based on time-frequency analysis of AE signals, it was found that AE signals with frequency ranges of (62.5-125), (250-312.5) and (312.5-375) KHz were generated from matrix cracking, fiber slipping and fiber breakage respectively.
Volume 13, Issue 52 (Winter 2020)
Abstract
“Rostam in the Twenty-second Century”, written by Sanatizadeh Kermani, is the first science fiction novel in Iran. Noteworthy, science fiction is widely known as a genre in children's literature in Iran. The current paper attempted to examine various aspects of this novel, regarding its genre and also identify its readers. For this purpose, the main components of the genre, namely science, imagination, materialism, novum, prediction and nostalgia along with three components identified by the researchers, which are taboo-breaking, hopefulness and empowerment, were employed to analyze the novel. The results showed that the novel seeks to address issues such as the pursuit of happiness in modernity, the power of modern man, and even resurrection of the dead, with the aim of comparing tradition and modernity, and it generally targets adults as its readers. Therefore, it could be said that the novel was written for adults, but since the youngsters are very well acquainted with technology these days, it can also be suitable for adolescents as well. Moreover, by focusing on the scientific and imaginative aspect of the novel, it became apparent that although this novel does not employ a specific scientific justification for the probability of the events, it has applied imagination to an area which is beyond human power. In conclusion, the novel can be considered as a science fiction story as it creates a novum that led readers to alienation
Mohammad Zadshakoyan, Vahid Pourmostaghimi, Hasan Heidary,
Volume 15, Issue 13 (Special Issue 2016)
Abstract
Seyed Hamidreza Heidary, Borhan Beigzadeh, Mohammad Riahi,
Volume 17, Issue 7 (9-2017)
Abstract
Soft- tips, in human fingers, plays a great role in object grasping; specially, when we talk about isotropic and elastic matters. By other word, stability of a typical grasping is really dependent on contact conditions. Well, rolling is the type of constraint approached by this feature and focused in this paper. Grasping an elastic sphere-formed ball by a pair of soft-tip parallel fingers is presented. For starters, by modeling objects as a mass-spring system, dynamic and kinematic systems of equations are derived. Then, a position-based impedance control is developed for the supposed system. To implement and validate the suggested controller, a pair of soft-tip fingers, holding an elastic ball, simulated in ADAMS; this software begets a control block in the Simulink software as a plant of the control system. As a consequence, the process of grasping under the effect of controller can be simulated in real time. The result of the simulation shows the ability of controller in appropriate tracking fingers till making contacts with ball and more importantly, by graphs, stability of grasping is guaranteed.
Ali Gholizade, Naeim Akbari Shah Khosravi, Reza Mohammadi, Mehdi Ahmadi Najafabadi, Hossein Heidary,
Volume 17, Issue 8 (10-2017)
Abstract
Nowadays fiber reinforcement composite are highly regarded, because of their proper mechanical properties and low weight. One of their main ways to assemble is drilling. Drilling causes to many failures such as: delamination, hole shrinkage, fibers pull-out and thermal failures. These failures reduce composite strength specially in fatigue loading. Using of carbon Nano tubes improve mechanical properties such as: hardness, strength, young module and stiffness. This investigation focuses on effect of added carbon Nano tubes Wt% on lifetime of glass/epoxy laminated composites under tensile - tensile fatigue loading. To main this purpose specimens whit different carbon Nano tubes Wt% have been made. They have been drilled by same condition. Then these specimens were subjected to tensile - tensile fatigue loading. AE sensors and microscopic camera were used to validate results. The results indicate that carbon Nano tubes Wt% increase, increase specimens fatigue life.
Volume 18, Issue 5 (11-2018)
Abstract
Suggestion of fracture toughness for controlling the ballast materials quality. Abstract . . . . . . . . Among the existing transportation systems, rail transport systems have special privileges including high capacity, safety, economy and etc. Structure of railways is composed of two main sections of substructure and Superstructure. Ballast is a layer between sleeper and sub-ballast that is composed of broken stones. These stones have uniform gradation. Since ballast bears heavy loads, its high quality is important. If the ballast is gradually crushed and fines are generated, stone permeability and drainage property will be damaged and finally, instability will be resulted. If the above problems occur at ballast, its substitution is necessary that has high costs. Ballast layer quality depends on materials and their density. Ballast must be resistant against applied load. For Ballast quality control several tests has been suggested in 301 railway magazine that after the test on Ballast, the results are compared with allowable values and Ballast quality was controlled. Ballast grains subjected to train loads, contain numerous cracks. From the fracture mechanic point of view, when stress intensity factor at the crack tip reaches the mixed-mode fracture toughness, crack growth begins and Ballast grains crush. Ballast crushing and abrasion are the main reasons for ballast contamination which is the main source of various defects, particularly geometric defects in the railway. Since disc-type specimens are among favorite test samples for determining mode I and mixed mode fracture toughness in brittle materials like rocks, Therefore it is suggested to add the determination of the mixed-mode fracture toughness I and II with the semi-circular bend specimens subjected to three-point-bend loading to the ballast quality control in 301 railway magazine. In this research, discussed the importance of fracture toughness in extraction, crushing and operation of Ballast, then the finite element method and experimental is used to analyze a semi- circular disc specimens under bending load and the fracture toughness of two Ballast mine, Anjilavand and Gaduk was determined. Anjilavand and Gaduk mine is two Ballast mines in Iran that using them for Ballast layers in railway substructure. The crack parameters KI, KII and T are calculated for different mixed-mode from pure mode I to pure mode II. YI, YII, and T* are the non-dimensional forms of KI, KII, and T, respectively. These parameters are functions of the crack length ratio, the crack angle and also the location of loading supports in the semi-circular bend specimen. The curves of YI, YII, and T* extracted for various combinations of modes I and II. Since the results for mixed mode fracture resistance of brittle materials are usually presented in a normalized form as KII/KIc versus KI/KIc, where KIc is a material constant called the pure mode I fracture toughness, using the mixed-mode fracture criteria, capped failure modes I and II for both ballast rocks were extracted and compared. Fracture toughness of Anjilacvand specimen is greater than Gaduk specimen that shows the Anjiavand Ballast for operation in railway is better than Gaduk Ballast.
S.h. Heidary , B. Beigzadeh ,
Volume 19, Issue 1 (January 2019)
Abstract
Anthropomorphic robotic hand has always been one of the interesting topics for researchers in recent decades due to its application range, including space exploration, medicine, military, etc. In this paper, a new plan is designed to drive exoskeleton fingers and by means of which the fingers can not only mimic human-like movements, but also be lightweight and portable. In this way, before implementation of the new plan, the anatomy of index finger and related kinematic were studied to give a hand to the extraction of angle relationships among distal, middle, and proximal phalanges. In upcoming step, theories, and mathematical relations about replacing sheaths and its influence on bending joints, based on the coupling mechanisms, were explained and applied clearly. Additionally, considering extracted relationships and equations in prior section, a new model of robotic finger with mentioned properties was simulated in MSC ADAMS software. In following step, after linking the software with Matlab, the results of the simulation and comparing them with human finger in the configuration and generation of humanoid movements were discussed. In the last step, according to simulation results, an example was constructed and presented, using a 3D printer in accordance with the proposed mechanism.