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مرکز اطلاعات علمی SID1
اسکوپوس
دانشگاه غیر انتفاعی مهر اروند
ریسرچگیت
strs
Issue Info: 
  • Year: 

    2022
  • Volume: 

    9
  • Issue: 

    2
  • Pages: 

    79-80
Measures: 
  • Citations: 

    0
  • Views: 

    8
  • Downloads: 

    0
Keywords: 
Abstract: 

Academic journals in the field of medical sciences are frequently emerging around the world. Given the quantitative increase in journals, what matters is journals' quality, scientific status, and credibility. Different stakeholders and organizations assess emerging journals to ensure how credible they are. Typically, researchers prefer to publish their articles in open access and high-quality journals due to the high potentiality of having more citations. It will allow the researchers to improve their academic ranks and consolidate their scientific position (1). As a result, increasing the number of published journals has created fierce competition among editors-in-chief and managing editors of scientific journals worldwide, all of whom undoubtedly aim to achieve a good position in international rankings by improving their publications' quality. . .

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Issue Info: 
  • Year: 

    2020
  • Volume: 

    22
  • Issue: 

    5 (96)
  • Pages: 

    167-181
Measures: 
  • Citations: 

    0
  • Views: 

    272
  • Downloads: 

    155
Abstract: 

Background and Objective: Rapid urbanization and vast changes in land cover have disrupted the urban green patches environmental structure and functions. Identifying and understanding these changes is necessary to improve the urban green patches situation in any place. Accordingly, the aim of this study is to evaluate the changes of green patches of Gorgan City using landscape METRICS, remote sensing and geographical information system techniques. Method: In this research, Landsat satellite images for 1987, 2001, and 2014 have been used to provide land use/cover maps of Gorgan City. After conducting the preprocessing, classification of the images was done using the supervised method and the maximum likelihood algorithm. Then the maps were reclassified in three classes namely built-up areas, green patches and other land uses. Afterwards, in order to investigate the changes in urban green patches, landscape METRICS including Class Area, Number of Patch, Mean Patch Size, Mean Size Index and Edge Density was used. Findings: Findings show that from 1987 to 2014, green patches, especially agricultural and forest lands, has been decreased and built-up areas has been increased. During these 27 years, built-up areas have increased approximately 15/86 km2 and green patches have decreased approximately 6/53 Km2. Also, the analysis of landscape METRICS shows a decrease in the number and size of green patches due to fragmentation and disintegration. Discussion and Conclusion: The results of 27 years’ green patches dynamic in Gorgan City show that the green patch of the city has been significantly reduced and fragmented. Therefore, studying urban green patch changes using new ecological approaches and methods, is necessary in any urban planning.

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Issue Info: 
  • Year: 

    2020
  • Volume: 

    11
  • Issue: 

    3 (40)
  • Pages: 

    13-14
Measures: 
  • Citations: 

    0
  • Views: 

    772
  • Downloads: 

    220
Abstract: 

Background and Objective Assessing the process of land use and land cover (LULC) changes leads to a clear understanding of how humans and the environment interact. Landscape METRICS can be used as a basis for comparing different scenarios of landscape or recognizing changes and developments in landscape over time. The use of landscape METRICS, while saving time, makes it possible to assess the environmental impact of human activities in the shortest time. Population growth in recent decades, the region's high potential for farming, rising expectations and higher demand for income, low employment rates, tourism in the region, the development of communication routes, as well as inappropriate decisions in recent years have led to many changes in Ardabil province. Given the ecological importance of the study area, it seems that the analysis of the relationship between landscape METRICS and LULC changes of Ardabil province in the period 1987 to 2015 is a way to quantify the impact of these changes on the landscape...

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گارگاه ها آموزشی
Author(s): 

KARHIKEYAN T. | GEETHA J.

Issue Info: 
  • Year: 

    2012
  • Volume: 

    -
  • Issue: 

    -
  • Pages: 

    0-0
Measures: 
  • Citations: 

    446
  • Views: 

    15199
  • Downloads: 

    26281
Keywords: 
Abstract: 

Yearly Impact:

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Author(s): 

YOUNGBLOOD ALISHA D. | TERRY R.

Issue Info: 
  • Year: 

    2003
  • Volume: 

    15
  • Issue: 

    1
  • Pages: 

    11-17
Measures: 
  • Citations: 

    454
  • Views: 

    34833
  • Downloads: 

    27847
Keywords: 
Abstract: 

Yearly Impact:

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Issue Info: 
  • Year: 

    2020
  • Volume: 

    10
  • Issue: 

    3
  • Pages: 

    618-629
Measures: 
  • Citations: 

    0
  • Views: 

    95
  • Downloads: 

    63
Abstract: 

Considering the costly nature of translation quality assessment in terms of time, money and energy, it seems logical to benefit from the modern technologies that are introduced in the field of machine translation (MT). Automated Translation Quality Evaluation Understudy METRICS (ATQEUMs) are one of these technologies that have revealed a promising application in assessing the MT output quality. This study, however, attempts to examine the reliability of the scores provided by the lexical ATQEUMs to human translated texts (i. e. the ones provided by 51 senior students of translator training programs in Iran) using 1, 2, … , 5 reference translations successively and separately. To this end, an empirical applied study is conducted following a quantitative approach to assess the reliability of the lexical ATQEUMs’ scores in comparison to the expert scorers’ scores. The higher the correlation between the sets of scores (in different stages of using 1, 2, … , 5 reference translations), the higher the reliability is interpreted to be. The results of the Pearson correlation coefficient analysis revealed that using 5 reference translations had led to the highest correlations in 37. 80% of cases, which is more than the number for any other situation considered (i. e. using 4 reference translations (3. 65%), 3 reference translations (10. 97%), 2 reference translations (31. 70%), and 1 reference translation (15. 85%)). However, using 2 reference translations achieved the second position in having the highest correlations which contradicted the hypothesis that more reference translations would

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strs
Issue Info: 
  • Year: 

    2020
  • Volume: 

    11
  • Issue: 

    4
  • Pages: 

    955-971
Measures: 
  • Citations: 

    0
  • Views: 

    408
  • Downloads: 

    193
Abstract: 

Landscape is one of the main factors influencing hydrological processes of the watershed. Changes in structure and spatial pattern of land use play important role in surface runoff and sediment yield. Determining the relationship between landscape patterns and hydrological processes can be used as an indicator of watershed soil erosion and sediment yield. Therefore, due to the problems in field measurement of sediment yield, its estimation using landscape properties and land use pattern is an appropriate alternative for current estimation methods. The purpose of this research is to determine the relationship between watershed sediment yield and landscape METRICS in the selected sub-watersheds of Golestan Province. To this end, suspended sediment concentration data for all hydrometric stations of the studied province were obtained from the relevant resources and appropriate sub-watersheds were selected. Then, using the land use map of Golestan Province, 15 landscape METRICS related to sediment yield were determined for different land uses by Fragstats 4. 2 software. In order to determine the relationship between watershed sediment yield and landscape METRICS, a partial least squares regression was used which combines the methods of principal component analysis and multiple linear regression. The relative importance of landscape METRICS was determined through examining the values of Variable Importance for the Projection (VIP) and Regression Coefficients (RCs). The results of this study indicated that the watershed sediment yield is densely associated with land use patterns. The main indices in reducing sediment yield were the Largest Patch Index (LPI), the average of the nearest neighbor distance (ENN-MN) and the average of perimeter-area ratio (PARA – MN) with values of VIPs of 1. 296, 1. 184 and 1. 747, and regression coefficients of-0. 014,-0. 039, and-0. 002, respectively. The main indices in incrising sediment yield were Landscape Shape Index (LSI) and mean patch size (AREA-MN) with regression coefficients of 0. 020 and 0. 017, respectively. The landscape characteristics in watersheds could account for as much as 71% of the variation in sediment yield of watershed. The results of study showed that the landscape characteristics can be used for watershed sediment yield modeling.

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Issue Info: 
  • Year: 

    2019
  • Volume: 

    9
  • Issue: 

    3
  • Pages: 

    43-55
Measures: 
  • Citations: 

    0
  • Views: 

    59495
  • Downloads: 

    82260
Abstract: 

Machine Translation Evaluation METRICS (MTEMs) are the central core of Machine Translation (MT) engines as they are developed based on frequent evaluation. Although MTEMs are widespread today, their validity and quality for many languages is still under question. The aim of this research study was to examine the validity and assess the quality of MTEMs from Lexical Similarity set on machine translated Persian texts. This study focused on answering three main questions, which included the extent that Automatic Machine Translation Evaluation METRICS is valid on evaluating translated Persian texts; the probable significant correlation between human evaluation and automatic evaluation METRICS in evaluating English to Persian translations; and the best predictor of human judgment. For this purpose, a dataset containing 200 English sentences and their four reference human translations, was translated using four different statistical Machine translation systems. The results of these systems were evaluated by seven automatic MTEMs and three human evaluators. Then the correlations of METRICS and human evaluators were calculated using both Spearman and Kendall correlation coefficients. The result of the study confirmed the relatively high correlation of MTEMs with human evaluation on Persian language where GTM proved to be more efficient compared with other METRICS.

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Author(s): 

LATIFI D. | RAZAVI A.

Issue Info: 
  • Year: 

    2009
  • Volume: 

    4
  • Issue: 

    -
  • Pages: 

    873-881
Measures: 
  • Citations: 

    950
  • Views: 

    24266
  • Downloads: 

    31995
Keywords: 
Abstract: 

Yearly Impact:

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Issue Info: 
  • Year: 

    2012
  • Volume: 

    64
  • Issue: 

    4
  • Pages: 

    431-441
Measures: 
  • Citations: 

    0
  • Views: 

    1106
  • Downloads: 

    323
Abstract: 

Human activities induced changes in land cover/use have extensive impacts on the landscape. In recent years, these changes had an increasingly growth due to irrational use of the natural resources in Iran. Hence, considering the negative effects of the inappropriate use of land and land-use change, understanding of the landscape changes over time is necessary to planning and implementation of sustainable management. This study has been carried out aiming to investigate trends in the landscape changes in Korganrud watershed during 1975-2007. In order to generate the land use/cover map and analysis of the changes, satellite images, including Landsat (MSS), IRS/P6 (LISS III) were applied and landscape METRICS, including Class Area (CA), Patch Number (PN), Mean Patch Size (MPS) and Average Weighted of Mean Shape Index (AWMSI) were used to quantify the landscape patterns. Results of the present study revealed an extensive change in the landscape METRICS in distribution and ratio of the land uses due to the increase in the area of disturbing patches (agriculture, urban and barren lands) in expense of decrease in the natural resources (forests and rangeland) during the study period. Degradation and reduction of integrity of the landscape have also been observed due to the increase in patch number of the land uses that were in association with the increase in shape complexity and decrease in the patch size in the study area. If such a trend continues, without any appropriate management plan and or land-use planning, it could result in adverse impacts on the structure of the ecosystems. Therefore, the results suggest the necessity of implementation of land use planning in order to determination of the suitability between land supply and demand, and decreasing degradation of the natural resources.

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