جستجوی مقالات مرتبط با کلیدواژه "مکان یابی" در نشریات گروه "زیست شناسی"

One of the most important concerns in fisheries management is finding suitable areas and zones to invest in aquaculture with a sustainable development approach. The use of GIS is one of the most important factors for success in aquaculture development.  Site selection of sturgeon breeding and farming locations was carried out using the facilities of GIS and data analysis was performed using fuzzy model, hierarchical analysis process and the fuzzy criteria AHP. The main criteria used in this study were ecological, climatic, natural and environmental, economic and social factors, barriers and limitations and sensitive habitats. Then, using the weighting method, a competency map was prepared and with considering the merit and applying the average of the merit value of each place, the priority of each place was determined. Combining this method with fuzzy logic and application in GIS environment and also taking into consideration the weight and relative importance of each feature and option, has increased the efficiency of this method. According to the results, the highest weight was awarded to ecological factors (0.321), the next ranks were awarded to climate (0.205), economic and social (0.179), natural (0.167) factors and barriers and restrictions (0.129), respectively. The most suitable areas for the development of sturgeon breeding and culture centers are located in the northern, northeastern and eastern regions of the Khuzestan province. The most unsuitable sites are located in the southern regions of the province.

Today, site selection is an important and necessary issue for construction and demolition wastes management in population fast-growing regions. Therefore, the main purpose of this research that was sponsored by Karaj municipality is landfill site selection for CDW in Karaj city with geographic information system (GIS) and multi-criteria evaluation (MCE) method. At first, by studying literature review, the criteria and sub-criteria necessary for site selection were identified. Four criteria and sixteen sub-criteria were selected by Delphi method. Weighting of criteria and sub-criteria was done by AHP method and expert choice software. All of the sub-criteria were mapped, standardized and overlaid in Arc GIS and IDRISI software environment by weighted linear combination (WLC) method. Finally, four alternatives (A1-A4) with a total area of 9700 hectares (4.7% of the total area of Karaj) have the the highest suitability, for CDW landfill in Karaj. These alternatives were ranked with TOPSIS method as A2>A4>A3>A4.

Due to the outdated methods of common landfill selection it is imperative to reevaluate the usage suitability. This study aims to assess the suitability of the existing waste landfill located 2 km east of Qeydar, Iran. We have used a combination of Geographic Information System (GIS) and Analytical Hierarchy Process (AHP) along with fieldwork surveys to assist us in achieving this goal. Diverse climatological, geological hydrological, environmental and socio-economical data were collected and analyzed. Subsequent to data base preparation, three major criteria and 11 sub- criteria were considered based on local legislations and data availability. Raster maps of the sub-criteria were prepared and transformed into 0 to 1 standard scale. Subsequently, AHP was applied to assign the relative importance weights of criteria and sub-criteria to each other. Finally, a landfill suitability map was generated and the study area was ranked based on final suitability scores. Based on the final suitability map, the unsuitable areas for the landfill are located around North and middle part of the plain. By contrast, the most suitable areas for landfill sittings are located mostly in South, parts of the studied area. The results indicate that the present landfill is situated in a unsuitable category.

Rapid growth in cities is a global phenomenon that is influenced by various environmental, human, political and economic factors. Providing better service to citizens and their convenience access to urban facilities are of urban planners and managers priorities. Proper site Selection is one of the most important factors in housing. Moreover, due to its multi-dimensional nature, it is in fact a complex process. Applying decision-making models in site allocation leads to the optimized site selection. One of the decision-making models is the Analytical Hierarchical Process (AHP). Under this model, the criteria and sub-criteria are ranked and the best option is selected.
This paper, with the objective of residential complex site selection, employed descriptive-analytical method to introduce physical-environmental criteria and sub-criteria effective in an appropriate residential land use site selection. Binary comparison matrices of Thomas L. Saaty were applied to assess the average weight of each criteria and sub-criteria and for their ranking. For prioritizing and weighting the criteria the viewpoints of expert designers and urban planners are asked through a survey. As a field study, the results are used to rank 3 case studies of residential sites based on physical-environmental criteria.

This research investigates the main factors for the possibility of converting Shahid Rajaee port to a free trade-industrial port. In the first stage of this research, the main factors influencing the formation of a free trade-industrial port have been recognized with the help of primary and secondary data in five distinctive groups. In the second stage, those main factors have been evaluated by the aid of questionnaires which had been distributed among 338 experts of Bandar Abbas city, Shahid Rajaee port and Shahid Bahonar port. 254 of the distributed questionnaires (75% of the total volume of the sample of the research) have been returned. As far as the statistical analyses are concerned to determine the research results, software packages such as SPSS and LISREL have been used. After investigating the various objectives of the ports of the world, the main possible reasons for the failure of free zones of Iran have been presented in the research. Furthermore, Various cases have been analyzed and studied. Finally, it has been found that Shahid Rajaee port is a place with very sufficient potential in order to be converted into a free trade-industrial port.

The purpose of this study was to find important criteria and sub-criteria for artificial reefs site selection for conservation of coral reefs in the Kish Island coastal areas (the Persian Gulf). This study was carried out using Delphi questionnaire and Analytical Hierarchy Process (AHP) methodology. We reviewed papers, which were related to the aim of the study. Four main criteria (physical environment, biological environment, managerial and socio-economical factors) and 32 sub-criteria were found to be important in stability of the coral reef ecosystems. The selected criteria and sub-criteria were re-assessed by 9 experts using a Delphi questionnaire. Subsequently, 13 sub-criteria (water depth, distance from natural reefs, water temperature, bottom slope, distance from polluted areas, competitive species, turbidity, natural larval supply, salinity, bottom type, currents, distance to ship waterways and economical advantage of reefs establishment) out of four main criteria were selected as the final subcriteria for artificial reef site selection in coastal areas of the Kish Island. In order to obtain relative weights and prioritization of the final criteria and sub-criteria, pair-wise comparisons were used (by Expert Choice 11). According to AHP, the weights of main criteria (physical, biological, managerial and socio-economical factors) were 0.553, 0.287, 0.122 and 0.038, respectively. Also, the weights of final 13 sub criteria were 0.153, 0.151, 0.091, 0.083, 0.081, 0.077, 0.073, 0.058, 0.056, 0.051, 0.046, 0.042 and 0.038, respectively. The results of the present study showed that physical environment and water depth were the most important criteria and sub–criteria, respectively, for selecting a site to construct artificial reefs in the Kish island coastal areas.

A population including 59 advanced backcross lines (BC2F5) which derived from the cross between IR64 as recurrent parent and Tarom molaei as donor parent, studied in order to map and determine the characters of QTLs for some quantitative traits in rice. The parental survey and genotyping were done by 235 and 114 SSR markers, respectively. Positive and/or negative transgressive segregationes were observed for all traits. From the QTLs mapped for all traits, at least one QTLs with additive effect mapped for all chromosomes, except of chromosomes 5, 9, and 12 with no QTL. Using multiple interval mapping, a total of 27 QTLs were detected, of which 3 were for plant height, 5 for number of tillers, 0 for flag leaf length (FLL), 10 for flag leaf width (FLW), and 9 for FLL/FLW. More than 44% of QTLs had negative additive effects. The maximum and minimum number of QTLs were mapped in chromosomes 1 with 9 QTLs, and chromosomes 3, 6, and 8 with one QTL, respectively. The digenic epistatic effect observed only for number of tiller with two additibe by additive interactions.