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Number of pages: 155 Category: Educational Sciences

Dissertation for receiving a master's degree in counseling and guidance, investigating the relationship between excessive use of mobile phones, feelings of loneliness and social adjustment with academic motivation in students. Abstract: This research investigated the relationship between excessive use of mobile phones, feeling lonely and social adjustment with academic ...

Number of pages: 137 Category: Electronic Engineering

Dissertation for master's degree in electrical engineering, power trend. Abstract Overvoltages are one of the most important factors that destroy and threaten the insulation of power network equipment and often cause interruptions in service and reduce the quality of power and reliability of the system. In addition, transient overvoltages caused by lightning are more common and ...

Number of pages: 131 Category: Chemical - Petrochemical Engineering

Chemical engineering master's thesis without preface today simulation in processes can be an important tool to solve problems in different industries. A new idea that should be done in the real world by trial and error with a lot of costs and risks can be simulated in the environment of a strong software and the results can be used. Simulation can also be used to check and ...

Number of pages: 103 Category: Chemical - Petrochemical Engineering

A master's thesis in the field of chemical engineering. Abstract of the laboratory study of the wear phenomenon of gas containing sand and liquid droplets in pipelines. For this purpose, a pipeline test device including: vertical and horizontal pipelines and various connections has been made. The studied fluid consists of three phases: gas, liquid and solid. The gas phase is ...

Number of pages: 169 Category: Electronic Engineering

The master's thesis of precision instruments and automation in the oil industry. The introduction of the entire research is one of the important scientific, technical and economic topics, the issue of corrosion of metals and the protection of metal facilities. Investigating the topic of corrosion is not so simple and with all the research done, its factors are still not known ...

Number of pages: 118 Category: Chemical - Petrochemical Engineering

Master's Thesis in the field of Chemical Engineering (no orientation) Abstract of the laboratory study of the wear phenomenon of liquid containing sand in pipelines. The studied fluid consists of two phases, liquid and solid. The liquid phase is water, and sand particles form the solid phase. In this research, the parameters affecting the wear rate, including: fluid speed, sand ...

Number of pages: 118 Category: Electrical Engineering

Dissertation for master's degree in electrical engineering, power trend. Abstract Overvoltages are one of the most important factors that destroy and threaten the insulation of power network equipment and often cause interruptions in service and reduce the quality of power and reliability of the system. In addition, transient overvoltages caused by lightning are more common and ...

Number of pages: 167 Category: Biology - Environment

Dissertation for Master's Degree in Mechanical Engineering Abstract: Nowadays, due to the increase in population in big cities, building high-rise buildings and residential towers may seem inevitable. But in locating these types of buildings and placing them together, a series of environmental requirements must be observed. In this thesis, an attempt has been made to re-evaluate ...

Number of pages: 57 Category: Agricultural Engineering

Dissertation for Master's Degree (M.Sc.) Field: Horticulture-Ornamental Plants Abstract To investigate the effect of gap and silver nanoparticles on the life of the flower and the hyphae characteristics of Alstroemeria hybrida cut flowers, a 2-factor factorial experiment based on a completely randomized design with two factors of stem end gap in 2 levels (5 cm gap and no gap) ...

Number of pages: 105 Category: Facilities - Mechanics

Field of study: Mechanics, orientation: energy conversion. The present research was conducted in order to investigate the movement of pig in pipelines. Due to the importance of pipelines in providing energy resources in the world, after installation and operation, the maintenance of these lines is of high importance, which has caused special attention to be paid to the design of ...

Number of pages: 120 Category: Facilities - Mechanics

Master's Thesis in Mechanical Engineering - Energy Conversion Abstract The vortex tube is a simple mechanical device that has no moving parts and is one of the equipment used in the refrigeration system, in which a high-pressure fluid enters the vortex tube through the inlet nozzles and splits into two streams with a lower and higher temperature than the inlet temperature, thus ...

Number of pages: 175 Category: Civil Engineering

Doctoral Dissertation in Civil Engineering - Summer 2013 Earthquake Abstract One of the appropriate tools to know the condition of the network­ As one of the vital artery systems, water distribution is an indicator of reliability. one hand

Number of pages: 174 Category: Architectural Engineering

Thesis (or dissertation) to receive the master's degree. In the field of architecture, the architectural trend of Bahman 93 abstract: Since the creation of multi-purpose and multi-functional spaces in

Number of pages: 121 Category: Industrial Engineering

Thesis for receiving the degree of M.Sc. Field: Industrial Engineering, Orientation: System Management and Productivity, Winter 2013, abstract of the problem of locating the axis of one of the fields.

Number of pages: 138 Category: Psychology

Dissertation for Master's Degree (M.A.) Major: General Psychology. The abstract of the present research is to investigate the effectiveness of emotional intelligence in reducing the dependence on Facebook of female high school students in Tehran. The hypotheses of the research are: 1- Training to improve emotional intelligence reduces the dependence of high school students on ...

Number of pages: 108 Category: Management

Dissertation for M.A. Abstract industrial tendency in a situation where manufacturing companies are engaged in activities under intense competition, they produce diverse products and sometimes they do not pay attention to the environmental effects of using different materials. This is while the implementation of environmental management practices such as green supply chain ...

Number of pages: 142 Category: Geography - Urban Planning

Dissertation for Master's Degree (M.Sc) Field: Natural Geography - Applied Climatology Abstract Due to its location in a special geographical location, topographic conditions and climatic systems affecting the region, the city of Kavus has a relatively cold climate. So that the air temperature in the coldest month of the year reaches 9.2 degrees Celsius and has the highest ...

Number of pages: 176 Category: Management

Academic thesis for obtaining a master's degree in the field: business management, orientation: transformation, re-engineering and organizational architecture are comprehensive plans for the current and future description of the structure and behavior of processes, information systems, personnel and organizational units, and in fact, they seek to align them with the goals and ...

Number of pages: 152 Category: Geography - Urban Planning

Academic Thesis for Master's Degree in Geography, Tourism Planning, Abstract: Handicrafts are considered to be the objective crystallization of culture and artistic manifestations and types of applied and folk arts, and since each handiwork reflects the historical, social and cultural characteristics of its place of production, it can be considered an important factor in ...

Number of pages: 92 Category: Computer Engineering

Master's thesis in the field of computer engineering (artificial intelligence) Today, the success of intelligent transportation systems depends not only on the information of the current traffic situation, but also to a large extent on the knowledge of the traffic situation in the next few minutes. Therefore, a lot of research has been done in the field of short-term prediction ...

Number of pages: 96 Category: Geography - Urban Planning

Dissertation for receiving the M.A. degree in the Department of Geography. The field of natural geography, the trend of climatology in environmental planning, is the abstract of a flood, a water flow that exceeds the capacity of the river channel and then flows into the adjacent floodplain. Although many local hydrological factors related to the catchment may affect the flood, ...

Number of pages: 191 Category: Management

Dissertation for Master's degree (M.A) in the field of public administration, the trend of transformation, the first chapter, the generalities of the research, the abstract of organizational communication, has always been one of the major topics of interest in organizations. With the advent of information and communication technology, tremendous changes in this field occurred in ...

Number of pages: 105 Category: Computer Engineering

A master's thesis in the field of computer-software engineering. Software vulnerabilities can lead to financial and information losses. Due to the limited financial and human resources, prioritizing the damages is very important. Before this research, a large number of researchers have classified vulnerabilities based on empirical and statistical knowledge. However, the variable ...

Number of pages: 102 Category: Civil Engineering

Master's Thesis (Civil Engineering - Water and Wastewater Engineering) Abstract: In this study, ram impact pump modeling was done by the software that was prepared. This software finds the outputs of the HAMMER software as input and by obtaining other information (including the pumping height, etc.) it calculates the amount of pumped water every time the valve is suddenly turned ...

Number of pages: 285 Category: Management

Industrial Management Doctoral Dissertation, Production and Operations, Abstract: The global automobile industry has grown a lot in recent decades compared to other industries. Every day, the intensity of competition in this industry increases to gain global market share. Iran's automobile industry has also taken effective steps to gain global market share through exports. In ...

Number of pages: 97 Category: Physical Education - Sports

Abstract: In electromyography studies, it is generally accepted to normalize the signals so that they can be compared and interpreted. But due to the lack of a standard method for normalization, there are many differences in the normalization method. These differences are related to the reference signal measurement method. The purpose of this study is to compare the reliability ...

Number of pages: 117 Category: Electronic Engineering

Presented to graduate education management as part of the academic activities required to obtain a master's degree in the field of mechatronics. Abstract As you know, air conditioner is a high consumption device and has a Freon refrigeration cycle. What drew the companies to the production of inverters was to solve the shortcoming of air conditioners in high energy consumption. ...

Number of pages: 88 Category: Electronic Engineering

Master's Dissertation in Electrical Engineering (M.Sc.) Focus: Power Abstract Reliability in any system is a concept that refers to the safe and reliable operation of the system. Although this concept is undefined in most systems such as electrical, mechanical, pneumatic, etc., it is of interest to designers and consumers, but with the advancement of technology and the increase ...

Number of pages: 147 Category: Chemical - Petrochemical Engineering

A master's thesis in the field of chemical engineering, abstract of the laboratory study and modeling of calcium carbonate production from calcium chloride solution by absorbing carbon dioxide from industrial exhaust gases, by the efforts of Amin Alamdari, the effect of carbon dioxide concentration on the precipitation of calcium carbonate species and the kinetics of calcium ...

Number of pages: 63 Category: Physical Education - Sports

Master's Thesis Abstract: The main purpose of this research is to investigate the state of the organizational structure and professional maturity of the employees of the General Department of Sports and Youth of Lorestan. The current research is of a descriptive-correlation type, which was carried out by the field method. The statistical population of the research includes the ...

Number of pages: 107 Category: Electrical Engineering

Master's Thesis in Electrical Engineering, Power 1-1 Introduction Energy supply sources in the last few decades have been from fossil sources, which until recently have been obtained almost cheaply. Cheap energy sources caused that the optimal use of energy and energy recycling were practically not paid much attention. Due to the energy shortage crisis and the sense of danger ...

Number of pages: 71 Category: Biology - Environment

Master's Thesis of Power Electricity Abstract: Photovoltaic energy is one of the clean and efficient energies that is expanding rapidly. With the increase in the penetration percentage of these power plants in the power grid, problems arise that may lead to errors and problems in the distribution system. One of the problems that may occur is the issue of voltage increase at the ...

Number of pages: 97 Category: Chemical - Petrochemical Engineering

Master's Thesis Abstract In this project, the coat cracker unit of Abadan refinery has been simulated using Hysys refinery software. In simulating and receiving information, feed properties and solving mass and energy balance equations have been used. Simulation data and operational data of Abadan Cat Cracker unit have been compared. Also, by changing some important operational ...

Number of pages: 114 Category: Biology - Environment

Master's thesis in the field of electrical-electronic engineering Abstract of the construction of a humidity sensor using carbon nanotubes Today, humidity sensors have many applications in various fields, including environmental control processes, household applications, automotive industry, medicine, agriculture and chemical industries. Until now, various structures have been ...

Number of pages: 46 Category: Agricultural Engineering

Abstract To investigate the effect of Nestern base on the vegetative and reproductive growth of four rose cultivars, the experiment was conducted as a factorial with two factors in the form of a randomized complete block design in 3 replications. The first factor (A) includes four cultivars of rose Tabo (red), Superstar (orange), Dr. Benjamin (pink) and Evening Star (yellow) and ...

Number of pages: 48 Category: Agricultural Engineering

Thesis for Master's degree (M.A.) Abstract In order to investigate the effect of planting date on dry matter allocation coefficients in soybean cultivars (DPX, Williams, Parshin), an experiment was conducted with 3 planting dates (June 30, July 9, and July 19) in the form of a randomized complete block design in four replications. In order to determine the dry matter allocation ...

Number of pages: 90 Category: Biology - Environment

) Master's Thesis in Microbiology Abstract: Considering the expansion of the use of leeches for therapeutic purposes and since the Food and Drug Administration approved that the use of leeches after surgery can lead to bacterial infection. FDA In this study, independent culture and dependent culture will be used to know the specific signs of gastrointestinal tract microbes in ...

Number of pages: 73 Category: Facilities - Mechanics

Master's Thesis Applied Design Abstract In this thesis, in the field of vacuum technology, the importance, application and role of this technology in the industry and the advancement of scientific research, technical terms related to this technology, types of vacuum pumps, applications, advantages and disadvantages of each of the vacuum pumps, the importance of studying the ...

Number of pages: 173 Category: Librarianship

Abstract The main goal of this research is to investigate the relationship between conservatism in financial reporting and the liquidity of shares of companies listed on the Tehran Stock Exchange. In this research, conservatism in financial reporting as an independent variable and 13 indicators of stock liquidity, including the number of stock trading days, the number of stock ...

Number of pages: 61 Category: Librarianship

Abstract: One of the sources of information for investors, creditors and other users of company information is the financial information provided by the management. Financial statements are one of the main sources of information for companies that make the market transparent. Considering the importance of information transparency of companies in the capital market, the present ...

Number of pages: 159 Category: Management

Master's thesis in the field of technology management, technology transfer, abstract is one of the most important main factors in the success of using technology in order to gain a competitive advantage, awareness and recognition of the level of the company's technological capabilities and their proper use. Technological needs assessment is a tool used to determine the ...

Number of pages: 152 Category: Management

Dissertation for Master's Degree (M.A.) Direction: Human Resource Management Abstract: Work is an important source for earning a living and achieving social positions, which can lead to dissatisfaction, deterioration of physical and mental strength. Job burnout is a process of physical-psychological fatigue that is caused by continuous emotional pressure caused by long-term ...

Number of pages: 86 Category: Librarianship

Master's Thesis in Accounting (M.A) Abstract The explosive growth of the world's financial markets has created competition among investment institutions, and in order to achieve better investment results, investment institutions must make predictions about their decisions, including the most important issue raised in the field of financial management, assuring real and legal ...

Number of pages: 179 Category: Geography - Urban Planning

Dissertation for Master's Degree (M.A) Field: Geography Major: Tourism Planning Flower and plant tourism is one of the special branches of tourism and day by day the number of this type of tourists is increasing in the modern world. Flower and plant tourism can be seen as visiting destinations where the primary motivation for traveling to those destinations is the interest in ...

Number of pages: 115 Category: Librarianship

Dissertation for receiving a master's degree in the field: accounting. Abstract One of the existing mechanisms in order to reduce the agency problem and reduce the information asymmetry between shareholders and managers in the capital markets is the corporate governance system. The role of institutional shareholders in corporate governance and their presence in companies has ...

Number of pages: 118 Category: Psychology

In order to receive a master's degree in the field of cognitive psychology, the aim of this study was to study the arousal, pleasantness and dominance of the words used in the common titles of Persian language websites inside and outside the country and to determine its relationship with the arousal, pleasantness and dominance of the whole news headline and to evaluate domestic ...

Number of pages: 146 Category: Psychology

Dissertation: To receive a master's degree in the field of clinical psychology, abstract depression is a well-known term, but a challenging issue in the field of mental health. The purpose of the present study was to determine the effect of cognitive-behavioral group therapy on the feeling of loneliness and general self-efficacy of patients with major depression. The statistical ...

Number of pages: 124 Category: Management

Dissertation for Master's Degree (M.A.) Direction: Human Resource Management Abstract With the expansion of the globalization phenomenon, the importance of trust in social, economic, political and organizational relations has been significantly noticed, so that most experts in various sciences have pointed out the importance of the role of trust in organizations. The purpose of ...

Number of pages: 143 Category: Art - Graphics

Master's Thesis of Handicrafts Design and Production of Wooden Products Abstract Chair is one of the practical devices that people constantly deal with during the day due to its type of use and has always been the focus of artisans and designers. Therefore, motifs and symbols that have their roots in the valuable treasure of our traditional arts have the ability to be used in ...

Number of pages: 124 Category: Geography - Urban Planning

Academic Thesis for Master's Degree (M.A.) Field: Geography / Political Orientation Abstract: Border refers to a spatial phenomenon that reflects the territory of a government's political sovereignty and, according to certain rules, creates an obstacle to human movement, the transfer of goods, the dissemination of ideas, etc. One of the important topics about international ...

Number of pages: 125 Category: Management

Master's degree thesis in the field: MBA Management Abstract This project was conducted with the aim of investigating the competitive environment of the dairy industry based on Porter's five forces model in Doshe Haraz Amol Dairy Company. The competitive situation in an industry depends on five basic forces. The joint power of these forces determines the final profit and ...

Number of pages: 79 Category: IT Information Technology Engineering

Master's Thesis Abstract Air traffic management is one of the sensitive and stressful jobs that face various problems and obstacles every day, and the Aircraft Sequencing Problem is one of the most important issues that are dealt with in the field of Air Traffic Control these days. The plane sequence problem is an NP-hard problem, exact algorithms lose their efficiency on this ...

Number of pages: 124 Category: Civil Engineering

Dissertation for Master's Degree in Civil Engineering - Abstract Hydraulic structures in high dams of spillways, as one of the dependent hydraulic structures, have the important role of discharging the incoming floods into the dam reservoir with sufficient safety in free flow or under pressure downstream. In tunnel overflows where the flow is at a high speed and often under ...

Number of pages: 140 Category: Electronic Engineering

Master's Thesis of Electrical Engineering - Power Abstract The discussion of repairs in any system, including the power system, is of special importance. In the traditional structure of the electricity industry, repairs related to the generation and transmission sectors are both carried out by the network operator. With the restructuring of the electricity industry, the repair ...

Number of pages: 117 Category: Electronic Engineering

Dissertation for receiving a master's degree in the field of electricity, power orientation. Abstract In this thesis, the effect of return arc phenomenon on the performance of distance protection relay has been evaluated. Because the lightning striking the tower or the wire guard in the transmission lines can cause a return arc on the chain of insulators. Therefore, at first, ...

Number of pages: 117 Category: Electronic Engineering

Dissertation for receiving a master's degree in the field of electricity, power orientation. Abstract In this thesis, the effect of return arc phenomenon on the performance of distance protection relay has been evaluated. Because the lightning striking the tower or the wire guard in the transmission lines can cause a return arc on the chain of insulators. Therefore, at first, ...

Number of pages: 101 Category: Computer Engineering

The final exam for receiving a master's degree in computer engineering (M.SC) specialization: software Abstract: Since the beginning of digitalization of real and legal documents, the owners of their documents have always been looking for a suitable way to protect their copyright. The increasing expansion and growth of the Internet has caused extensive changes in the way of life ...

Number of pages: 75 Category: Management

The first chapter of research overview 1- Introduction The growth and development of joint-stock companies over time led to the emergence and increase of a class of capital owners who did not directly participate in the management of the companies and guided and monitored the company's affairs through the selection of the board of directors. This new development created a new ...

Number of pages: 115 Category: Chemical - Petrochemical Engineering

In order to obtain a master's degree in chemical engineering, abstract freezing of fans in operational units, including the hydrogen unit of Imam Khomeini Shazand Refinery in the cold seasons of the year is one of the important problems in this refinery. In order to provide a suitable solution to this problem, we must have a suitable estimate of the fan outlet temperature. The ...

Number of pages: 84 Category: Medical Sciences

Master's course in intensive care nursing Abstract Introduction: In the intensive care unit, ventilator-associated pneumonia ranks first among hospital infections. Since the role of nurses in preventing this complication is very important, the present study was conducted in order to compare the effect of two methods of face-to-face training and clinical guidelines for the ...

Number of pages: 95 Category: Medical Sciences

Dissertation to receive Ph.D. Persian Summary Otostegia persica is one of the Lamiaceae (mint) plants, which in traditional medicine is used to treat malaria, reduce blood sugar and blood pressure, and relieve S fever. The name of this plant in Persian culture is ""golder"". This genus has 3 species of perennial herbaceous plants in Iran: Otostegia aucheri, Otostegia micchauxii, ...

Number of pages: 126 Category: Chemical - Petrochemical Engineering

Thesis for master's degree in the field: chemical engineering Abstract Hard polyurethane[1] is always considered one of the most effective and practical polymers in various industries, especially the coating industry. Excellent adhesive property, curing ability at ambient temperature and corrosion resistance of this polymer are some of its remarkable features. This study was ...

Number of pages: 103 Category: Paramedical

Dissertation for Master's Degree in Nursing Education (Community Health Orientation) Abstract: Introduction: Assessing the mental health of students is one of the important axes of promoting mental health in societies. One of the mental health challenges during adolescence is the feeling of loneliness, which may occur as a result of Internet addiction or cell phone addiction. ...

Number of pages: 101 Category: Electrical Engineering

Dissertation for receiving the master's degree ""M.Sc."" Electrical engineering field - control trend. Abstract: One of the effective methods that has attracted the attention of electricity authorities in recent decades is the use of existing lines to build new lines with higher voltage. It is natural that with the increase in voltage, the width of the boundary on both sides of ...

Number of pages: 101 Category: Facilities - Mechanics

In order to obtain a master's degree in the field of mechanical engineering, energy conversion, abstract: In this thesis, the mass and heat transfer by integral method in the flow of natural displacement of a fluid with a very low frontal near the wavy inclined wall and under the magnetic field has been investigated. The wall is permeable and as a result, the fluid can be sucked ...

Number of pages: 91 Category: Facilities - Mechanics

Master's thesis in the field of mechanical engineering - energy conversion trend Abstract: In this research, the turbulent flow of a non-Newtonian nanofluid in a microchannel with a circular cross-section is simulated. First, the types of classification of microchannels, the methods of making microchannels, as well as the advantages and challenges of using microchannels are ...

Number of pages: 147 Category: Electrical Engineering

Master's Thesis of Electrical Engineering - Power Abstract The discussion of repairs in any system, including the power system, is of special importance. In the traditional structure of the electricity industry, repairs related to the generation and transmission sectors are both carried out by the network operator. With the restructuring of the electricity industry, the repair ...

Number of pages: 96 Category: Facilities - Mechanics

Dissertation for M.Sc Mechanical Engineering - Energy Conversion Orientation Abstract: In this research, the turbulent flow of a non-Newtonian nanofluid in a microchannel with a circular cross-section is simulated. First, the types of classification of microchannels, the methods of making microchannels, as well as the advantages and challenges of using microchannels are stated. ...

Number of pages: 76 Category: Agricultural Engineering

An academic thesis for obtaining a master's degree in agriculture majoring in agriculture, investigating the effect of the amount of ripening and the number of harvests on the quantitative and qualitative yield of pvh19 tobacco production. Abstract In order to investigate the effect of the amount of ripening and the number of harvests on the quantitative and qualitative yield of ...

Number of pages: 74 Category: Food and Packaging Industries

Dissertation for M.Sc. in Food Engineering, Agricultural Orientation Abstract The focus of recent research has been photochemical substances derived from plants, which are due to their positive effects on human health. During processing in factories, food can be enriched with active compounds such as phenolic compounds that have benefits and physiological properties such as ...

Number of pages: 54 Category: Agricultural Engineering

Master's thesis in the field of agricultural engineering - horticultural sciences, specialization: ornamental plants. Abstract In order to investigate the effect of sodium nitroprusside on the flowering life of rose, sunflower and lisianthus cut flowers, a study was conducted in the form of a factorial experiment based on a completely randomized design with two sodium ...

Number of pages: 41 Category: Agricultural Engineering

Dissertation for Master's Degree (M.Sc) Field: Horticulture Major: Ornamental Plants Abstract In order to investigate the effect of different waters on the life after harvesting of rose, chrysanthemum and gerbera cut flowers, a factorial experiment was carried out in the form of a completely randomized design in 3 replications with two factors: types of water (magnetic water, ...

Number of pages: 74 Category: Paramedical

Dissertation for Master's Degree in Special Care Nursing Introduction: Evidence-based care is the application of the best research results, along with knowledge, expertise, clinical experiences and attention to the patient's values ??in the provision of care. For this purpose, the use of evidence-based guidelines and the quality review of evidence-based clinical care guidelines ...

Number of pages: 70 Category: Agricultural Engineering

Department: Plant Products Master's Thesis in Plant Products-Horticulture Abstract Rose (Rosa hybrida) is considered one of the most popular flowers in the world and its cut flower branch is the most used among other flowers. Due to the physiological reasons of being a rose cut flower, during its shelf life, it is highly susceptible to withering and reducing its freshness and ...

Number of pages: 196 Category: Facilities - Mechanics

Master's Thesis in Mechanical Engineering, Applied Design 1-1-Introduction All humans know that the heart is a vital organ in the human body, so we cannot live without it. But with a purely mechanical view, the heart is just a pump; A very complex and important pump; And in terms of being a pump, like all pumps, there is a possibility of clogging, failure or needing to be ...

Number of pages: 120 Category: Facilities - Mechanics

Dissertation for M.Sc Mechanical Engineering - Energy Conversion Trend Abstract In the last century, with the increasing demand for energy and the reduction of fossil fuel resources, the role of renewable energy in the progress and development of countries is not hidden from anyone. In the meantime, wind energy has a special share and has the highest growth rate among other ...

Number of pages: 118 Category: Electrical Engineering

Dissertation for receiving a master's degree in the field of electricity, power orientation. Abstract In this thesis, the effect of return arc phenomenon on the performance of distance protection relay has been evaluated. Because the lightning striking the tower or the wire guard in the transmission lines can cause a return arc on the chain of insulators. Therefore, at first, ...

Number of pages: 81 Category: Facilities - Mechanics

Mechanical Engineering Master's Thesis - Energy Conversion One of the ways to reduce energy consumption for underwater devices is to reduce the drag on these devices. The nose of underwater objects is one of the most important parts of these objects in dealing with currents. By optimizing this part, the drag can be reduced by controlling the boundary layer of the fluid, by ...

Number of pages: 174 Category: Agricultural Engineering

Dissertation for the M.Sc. Field of agriculture, the effect of water stress, zeolite and salicylic acid foliar spraying on some agronomic and physiological traits of spring safflower 1: General: 1-1: Introduction: Environmental stresses are the most important factors that reduce the yield of agricultural products in the world. If environmental stresses did not occur, the actual ...

Number of pages: 85 Category: Facilities - Mechanics

Dissertation to receive a master's degree in mechanical engineering in the field of construction and production. Abstract: The growth and expansion of cities and the development of urban life require up-to-date and expandable infrastructure. Transportation systems are among the basic infrastructures in cities, among which the creation and development of subway networks is of ...