جستجوی مقالات مرتبط با کلیدواژه "its services" در نشریات گروه "عمران"

In policy-making, increasing and improving the provision of services in order to reduce, and this makes the need for new qualities of modeling in the field of urban services to be felt more for urban progress and development. Therefore, the current research aims to help provide appropriate urban services and urban development by presenting the urban service-policy model. For this purpose, the research has been done in a developmental-applied way and in two quantitative-qualitative phases. The research community in the qualitative part of the experts includes senior managers of the municipality, who were selected by non-realistic and theoretical sampling method in the number of 15 based on the theoretical saturation criterion, and in the quantitative part, the statistical population of municipal employees numbering 350 people in a random-stratified manner. Is. The findings of the qualitative part with the content analysis method showed that the model includes five numbers "environmental", "economic", "cultural", "content", and "operational" along with 20 components. Quantitative findings with Dimtel's fuzzy method showed that "environmental", "cultural", "economic", "content" changes respectively affect "operational". The findings of the structural equation modeling method for the model test showed that the environment has a positive and significant effect on "cultural", "economic", "content" and "operational". Also, "cultural" changes have a positive and significant relationship with "economic" and "operational" changes. But "cultural" and "economic" relations with the "content" of approval between. Aspiring managers and statesmen should achieve success by deciding on appropriate laws and economic support in the proper implementation of policies.

Following the contiguous of Corona Virus (COVID 19), transportation services are facing a significant decline due to the implementation of social distancing plan, bans on unnecessary travels, increasing public concerns about the high risk of using public transport services and the closure of some businesses. Therefore, the transportation sector became one of the most vulnerable economic sectors due to these events. In this article, using the partial hypothetical extraction method in the framework of the newly constructed social accounting matrix (SAM) for 2016, the effects of contiguous of COVID 19 on the economic activities and income distribution have been investigated using two scenarios. The first is a one-month shutdown of 4 subsectors of transportation services and the second is the continuation of the current situation during the current year. The overall results are as follows: One- in the case of first scenario, due to partial extraction of 4 subsectors of transportation, output, GDP, urban households and rural households incomes will decrease by 0/604, 0/608, 0/648 and 0/691 percent respectively, whereas for the second scenario, the corresponding figures will be 4/370, 4/349, 4/650 and 4/915 percent respectively. Second- “wholesale and retail”, “manufacturing of coke and petroleum products”, “crude oil and natural gas”, “manufacturing of food products”, “services of private real estates” and “livestock” are identified to be the most vulnerable sectors.

The Complexities of Operating DAR Services Mean That Computerized Planning and Scheduling Is Necessary for Systems of Realistic Size. This Research Studies an Electric Autonomous Fleet Size with Mix Dial-A-Ride Problem. The Goal of The Problem Is to Minimize a Weighted Objective Function Consisting of The Total Travelling Costs of All Vehicles, Users' Excess Ride Time Costs and Vehicles' Acquisition Costs While Satisfying Customer Service Level Constraints Along with Battery Level Management and Recharge Times Management Constraints. In This Variant of The Dial-A-Ride Problem, Recharging at Any of The Available Charging Stations Is Allowed. A Cluster-First, Route-Second Genetic Algorithm Is Proposed to Solve the Problem, Where the Clustering Is Performed by Choosing the Fleet Size and Assigning the Customers to The Fleet Using a Genetic Algorithm (GA), Then the Primary Routes Are Developed by A Routing Heuristic, Finally the Charging Stations Will Be Inserted to The Algorithm Using an Insertion Technique. The Performance of The Proposed Method Is Tested by Using Benchmark Instances of a Related Problem from The Recent Literature. The Proposed Method Has Achieved Solutions Comparable with The Current State-Of-Art Methods. The Computational Results Show That the Proposed Method Is Effective in Finding Comparable Solutions with The Current State-Of-Art Method. New Instances, Some of Which Include First-Mile Feeder Services, Are Generated Based on The Data from Uber Technologies Inc. Tests Performed on New Instances Demonstrate That the Minimum Possible Fleet Size Does Not Always Result in Minimum Costs. Moreover, The Tests Show That Integration of The Feeder Services into Dial-A-Ride Services Increases Ride-Sharing Ridership.
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Spatial equity of urban health (USEH) is closely related to quality-of-life standards and urban development. Its evaluation is very important in the performance of public health and urban planning.  The aim of this research is to develop an approach to prepare and evaluate the USEH map using two data sets including reference location information and Volunteered Geographic Information (VGI).  To determine the accuracy of the maps obtained from both types of data sets. This research was carried out in district 6 of Tehran metropolis. In this research, the effective criteria of the amount of USEH were first determined. The criteria map was prepared with spatial analysis and multi-criteria decision-making, and the final USEH map was prepared by combining the criteria map. To validate the prepared map, the USEH map was again produced based on the VGI information provided by the citizens and compared with the map obtained from the reference data. The amount of USEH for citizens is classified into 5 levels, from very suitable to very unsuitable. Based on the USEH map obtained from the reference data, approximately 62% of the study area has good or very good spatial equity. Comparison of the VGI map with the reference map showed a 72% match. Determining and evaluating USEH for different regions using new methods and technologies is a fundamental step to help health decision-makers in order to manage and allocate resources. It is expected that the results of the present research will be considered an essential criterion for decision-making in the field of health and increasing spatial equity in citizens' enjoyment of health facilities and components.

International Civil Aviation Organization (ICAO), having published the document 9859 in 2007 and the second edition of mentioned document in 2009, has obliged all member countries to get airport certification for international and semi- international (air border) airports. Iranian Airports Company has attempted to audit mentioned airports to deliver aerodrome certificate. Shiraz International Airport as the first international airport succeeded to get aerodrome certificate in 2011 and in line with obligations has implemented the Safety Management System (SMS) at the airport complex. The importance of the safety management system is that it has a proactive and systematic approach towards the safety. The aim of implementation of safety management system is to provide safe, secure and higher quality services in the air transportation industry. Present study was performed to investigate the impacts of the implementation of safety management system on the quality of airport services at shiraz International Airport using the SERVQUAL model and with a statistical population of 750000 customers of Airport services in two sections of domestic customers and foreign customers in Shiraz International Airport who used Airport services in the last three months of 1397. The method used in this research is descriptive-survey statistical method by using Pearson's transformation correlation coefficient and testing related hypotheses. Based on the results of research, the existence of a positive and significant relationship between implementation of safety management system and the quality of airport services at Shiraz Martyr Ayatollah Dastgheib International Airport was approved.
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Today, location recommender systems have made it possible to analyze and recommend location services for different users. The ability to personalize the provision of services to various system users has increased the applicability and efficiency of such systems. The personalization of recommendations in the field of sports venues is one of the urban services that can be very effective in increasing the level of health of citizens and society. The purpose of the current research is to design a personalized knowledge-based recommender system so that people can receive the most suitable and optimal positions for receiving sports services based on their needs and conditions. In order to implement the proposed plan, different people were clustered based on their characteristics and personal conditions with the help of the self-organizing neural network algorithm, and in order to model the uncertainty, the preferences of the elderly were entered into the intuitive fuzzy inference engine and a clear and accurate output was obtained and given to the user. In this research, the knowledge recommender system has been designed as a personalized basis for providing sports recommendation services so that citizens can receive the most appropriate and optimal services based on their needs and conditions. In order to implement the proposed plan, the characteristics and personal conditions of people were obtained based on various online questionnaires and based on the unsupervised neural network of self-organizer mapping, people with similar characteristics were placed in specific groups, and in this way, and the basic knowledge base for the recommender system was created. Finally, through the descriptive combination of the obtained outputs from the information of the users, optimal positions have been extracted for recommending and displaying the output of the system on the map, Django library, which is a web-based programming platform, has been used. From the Open-Layer location library and J-Query library, the desired location should be shown on the OSM map as a map under mobile. After that, through the designed user interface, the personal characteristics of the people are received, then, the individual cluster is determined, and in order to model the uncertainty, the information received from the citizens is entered into the fuzzy inference engine of the second type. The outputs obtained from the designed algorithm will be displayed as a set of positions and the user can see its position on the map by selecting any of these positions. Then, an explicit and accurate output of the user's preferences has been achieved and a recommendation is made from the inflectional combination of the outputs obtained from the two designed sections, and suitable outputs are recommended to the user. Finally, the system was evaluated based on three parameters: accuracy (0.74), sensitivity (0.81), and F-Score (0.77), and the results indicate a good and acceptable performance of the system.

Agricultural tourism development is one of the basic components of rural job diversification strategies and rural development. In agricultural tourism, the visitor pays a fee to the farmer by attending the agricultural units and receiving the relevant services. Understanding the target market is one of the most important requirements for the development of agricultural tourism. Therefore, the present study analyzed the activities and desirable services of agricultural tourism from the perspective of tourists. The study sample of this study included 98 tourists visiting Bolordkan. From the tourists' point of view, the activities, including the favorable climate and sports attractions of the region, a suitable place to see the forest and other existing plants, a suitable place for walking and sports had the highest priority. Also, the analysis of components related to activities and services affecting the selection of agricultural tourism destinations, showed that from the perspective of tourists, the component of information and welfare facilities of tourists, creating suitable places for tourism, changing rural lands and context, creating employment and rural income Establishment of cultural and medical centers for tourists, the cultural anomaly of the villagers in total had a variance of 52.65%

The increasing the volume of world trade and its changes in the economic environment of the countries, has increased the competition in business and has made the internationalization as one component of the strategy of the business in many countries of the world through exporting the technical and engineering services. Despite the existence of different models for the internationalization of companies, the Apsala model is one of the most common models in many countries and this model develops the process of exporting of the goods and technical and engineering services with a precise and gradual process, and with considering the psychological distance with the target countries as well. This model matures the organization by providing a four stages performance through case exports of services, exports through representation, exports through the creation of branches, and finally by providing services from the target country. This research is a survey in terms of purpose and application and in terms of method, and is consistent with library studies and interviews with experts, as well as accurate analysis of psychological distance criteria. According to studies carried out, it has been cleared that weaknesses introduced for this model in the field of construction works for Iran and for regional countries comparing the strengths due the short psychological distance resulting from  the multilateral commonalities is insignificant and it seems that the Apsala is an appropriate model for exporting the Iranian technical and engineering services to names and regional countries, as well as focusing on neighboring countries of Iran to determine the target countries for exporting the  technical and engineering services, Iraq and Afghanistan  are the first priority, and Oman and Qatar are the next.

Extensive use of new project delivery systems and engineering important role followed by contractual types developments inside or outside of country increased the importance of providing identical internal and international contracts. These contracts prepared a standard framework for project risk and responsibilities allocation for both consultants and clients. This research aims to study general condition of Iran and FIDIC consultant's agreement to determine challenging clauses and conflict orientation in these contracts.
Accordingly, after reviewing Iran and FIDIC client/ consultant agreements, comparison between contractual clauses has been carried on and important clauses with indemnity provision has been separated; which based on, claim source breakdown structure (CSBS) produced. Compensate receiver and indemnity type for those clauses has been set according to Iran and FIDIC consultant's general condition; followed by comparing between two contract clauses and analytical analysis. Consequently, a complete list of important clauses with indemnity provision related to consultants and clients determined and classified in terms of cost, time, scope and contractual claim's reasons. The results show higher contractual risks and most claims ensue of cost's conflicts for consultants in internal contracts. Recommended suggestion for Iran and FIDIC client/ consultant agreement are provided based on this study results and expert's ideas

The rapid growth of metropolises in the world and the increase in their population have engendered a lot of problems such as traffic challenges and disruptions in the urban transportation system. Therefore, the mentioned problems have been basic challenges facing urban planning in late 20th century which have had negative influences on achieving aims of urban sustainable development. The rapid increase in the number of motorized means of transportation, especially automobiles as well as high use of them in cities of Iran and particularly in Metropolis of Ahvaz with the population growth and its unbridled expansion, increasing immigrations and the lack of scientific and comprehensive planning, frequent problems in the public transportation have caused problems such as severe environmental pollutions, high and boring congestion of traffic, citizens’ waste of time, energy overconsumption, unsafety of paths and accidents, etc. have made lives in this city difficult and reduced welfare and convenience in it. Accordingly, the present study aims to identify and prioritize strategies bus service development in Ahvaz Metropolis. The main approach of the study is developmental-applied, the research method consists of descriptive, analytical, and survey research techniques. According to the model of SWOT situation analysis (strengths, weaknesses, opportunities, and threats), identification and evaluation of the status quo was conducted and after that, with regard to the identified criteria, the four strategies were developed. Finally, using multivariate decision making technique of FDEMATEL, strategies were prioritized. The results of the study indicate that strategies (1) the necessities and commitments of the government to provide required funding in line with the law of development of public transit and fuel consumption management; (2) providing required grounds for facilitating the implementation of integrated urban management; (3) defining Income-generating projects aimed at empowering organizations to increase revenue and create alternative income sources and methods in the municipality rather than increasing sales density, etc.; (4) practicing management of integrated transport and traffic (management of urban travel, management of parking management fleet and public transportation network, managing the culture of traffic management in urban planning, management of emergencies, network management and traffic management on standardization, installation and maintenance of traffic ; automated traffic management, traffic engineering management, management of R & D); (5)understanding the interaction of transportation with various aspects of society (economic, social and environmental) and the balance between these aspects in order to achieve sustainable transport; and (6) development of Intelligent Transportation Systems (ITS) are respectively the most prioritized strategies in planning and development of Bus Transit Development in Metropolis of Ahvaz

Search, discovery, and prioritizing important places and facilities is a vital requirement of users in urban environments. Over the past twenty years, web mapping applications have been continuously improving to better proffer location based services to users. A considerable part of users’ search in web mapping application can be addressed by simple distance-based spatial search. However, there are cases where, in order to properly address user requirements, web mapping applications need to consider not only simple spatial criteria but also spatial relationships. Additionally, current web is moving towards machine readable and machine understandable contents through semantic web. Semantic web provides standards and technologies for machines to be capable of understanding documents on the web. Meanwhile, the amount of spatial data that is published on the web is rapidly growing. These data are faced with problems such as diversity, heterogeneity, incompleteness, and therefor are not well prepared for retrieval and utilization. Description of spatial data using semantic web concepts is a solution to most of the mentioned problems. Currently, different standardization organizations in geospatial community are working on development of required standards for semantic spatial data. GeoSPARQL, a semantic query language, is a standard developed to query and retrieve semantically described spatial information over the web. In order to enable citizens to search and recommend urban facilities, this study developed a web mapping application. In this application, GIS and semantic web technologies are integrated to enhance the performance of the system. Search and discovery based on simple geometric relations, topological relationships, spatial operators, semantic relations and descriptive characteristics of features are implemented in the system. The system implements semantic web technologies, ontology, Open World Assumption and spatio-semantic query language. GeoSPARQL ontology is used to define a RDF/OWL vocabulary for representing spatial objects and querying topological and non-topological relations. QallMe ontology is used to define concepts related to the tourism industry including urban facilities. In this system, interests and needs of citizens are considered as well. There are two executive routines in the system, including data entry and query handling. In the data preparation phase, spatial characteristics and attribute information of urban service centers from various sources are gathered and converted to a semantic representation based on the application ontologies. This semantic representation is saved in Parliament triple store. Having the data prepared in the triple store, a user can access the system through a web based user interface and search for required facilities or places within the city. The query is transformed to GeoSPARQL Select queries afterward and executed on the triple store. The responses are presented to the user on a map, developed by Google Maps APIs. In order to demonstrate the feasibility of the developed application, two usage scenarios are thoroughly implemented and described. The implementation results in spatial software comparing the developed application show the general adequacy of the system. Additionally, diversity, heterogeneity and incompleteness problems of spatial information on the web have decreased to a significant extent. The developed system helps citizens to find urban facilities accurately and efficiently.

Airline companies due to the industry's own Hsasyt Hay economic issues such as the high cost of fuel prices, regional wars, and lack of seasonal demand from passengers, political sanctions and terrorism dumped into bankruptcy. In addition to these, the aviation industry, an industry which is considered expensive that owns a major factor in throughput is and difficult to administer these firms to be placed sensitivity. Hence the study of the history of the aviation industry, we have seen many bankruptcies. In the event of bankruptcy of an airline, the airline industry should assess its impact on the two basic elements occur. The passengers to serve as the main consumers of air transportation and airports as infrastructure, aviation Pillars. Assumptions such as that whether travelers are affected by this phenomenon? Whether the airline's bankruptcy effect on contractual relationships with airports and their economic performance. This paper seeks to answer these Assumptions and by demonstrating the impact of the bankruptcy of airline companies on the above, in addition to the emphasis on prevention of bankruptcy of airline companies, on the integrity of these solutions is necessary.

Simultaneously with escalation of industrialization in the cities and the dominant presence of vehicle on the urban texture environmental quality especially of urban areas¡ the historic and central part of cities decline and lead to problems of access and transportation¡ severe interaction of car and pedestrians and violation of Non-motorised users rights in the space. Use of sustainable transport strategies such as cycling and walking is one of the practical solutions to heal the problems of this texture that play a great role in reducing travel costs¡ increased social efficiency¡ safety and security of citizens¡ reduce the damaging effects of environmental¡ health and etc. This paper summarizes the status of access and mobility in inner cities sustainable modes of walking and cycling more and more to accommodate with the physical characteristics of this part of the city has been suggested. In order to effectively implement these strategies¡ some of the services of intelligent transport systems (ITS) are presented to promote¡ support and maintenance the safety of users of these two modes of movement.

This paper deals with the problem of allocation of emergency service vehicles (ESVs) to emergency service stations in order to maximize the expected covering of the demands. Most of the previous studies in this area assume that every call needs only one ESV; however real experiences demonstrate that these assumptions are not valid. Hence, in this paper we are going to develop a model that could dedicate more than one ESV to each call. For this purpose, we use the queue theory with batch arrivals to calculate the availability rate of ESVs in each station. A mixed integer programming model is provided to determine the optimal number of ESVs in each predetermined emergency stations. A real case study is implemented in Mashhad for finding the number of ESVs in gas emergency stations. Model is optimally solved by CPLEX and results are discussed and some analyses on parameters of the model are done.

Nowadays، Mobile phones have different abilities like satellite positioning which allows calculating the users’ positions. These positions can be used for serving different location-based services for users. Therefore، these services should consider users’ interests and characteristics. This information is usually given manually by the users. If this information is extracted users’ behavior، these services can get interests information automatically. In addition، mobile devices can log calculated users’ locations. Then، each user’s trajectories can be achieved by connecting these locations considering temporal order. Information like interested locations، moving behavior and selected path by users can be extracted using these trajectories. This information can be used for applications like predicting users’ future location. Two methods for extracting interested locations for users are developed in this paper which can be a measure for the users’ behavior. These methods are evaluated using data for Beijing. First method extracts users’ interested locations without considering the time that the users were، but second method considers the presence time for the logged positions for extracting interested locations. Results show that second method has better functionality، because this method considers the trajectory data completely and number of extracted interested locations for second method was more than first method. These algorithms can be used for improving location-based services.

Intelligent transportation system (ITS) is coordination of the facilities, services, communication in an integrated framework. Its aim is to provide a set of units to reduce transportation's problems. Determination of user services is the first step for developing ITS architecture. In this research the availability of user services of our country was determined by using the method of ITS in the United States of America. User's demands were collected by field study and interview with both people and experts of project. Finally, the user services and their effects on the benefits of systems are presented in the form of a service packages.