World

i10 Productivity
Rankings

University of Guilan Scientists i10 Productivity Rankings (Sort by last 6 years i10 Index) 2024

Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Click for "last 6 years' i10 index". Also see: Universities Rankings 2024 (Sort by : Total i10 Index)  and Universities Rankings 2024 (Sort by : Last 6 Years i10 Index)

search
×
Total 917 scientist
Reza Ansari
Reza Ansari
University of Guilan
University of Guilan
Iran
Engineering & Technology / Mechanical Engineering
Computational Mechanics
Numerical Analysis
Continuum Mechanics
Nano-
Micro- and Macro-mechanics
i10 Productivity Rankings
University / Institution:
# 1
Country:
# 17
Region:
# 398
World:
# 1,805
i10 Index
Total:
538
Last 6 Year:
458
Last 6 Year/Total:
0.851
H-Index
Total:
77
Last 6 Year:
57
Last 6 Year/Total:
0.740
Citation
Total:
24,989
Last 6 Year:
15,833
Last 6 Year/Total:
0.634
Mohammad Mirzazadeh
Mohammad Mirzazadeh
University of Guilan
University of Guilan
Iran
Natural Sciences / Mathematical Sciences
Mathematical Physics
Nonlinear PDEs
Exact solutions
Solitons
i10 Productivity Rankings
University / Institution:
# 2
Country:
# 115
Region:
# 2,239
World:
# 10,698
i10 Index
Total:
253
Last 6 Year:
222
Last 6 Year/Total:
0.877
H-Index
Total:
69
Last 6 Year:
60
Last 6 Year/Total:
0.870
Citation
Total:
14,281
Last 6 Year:
10,474
Last 6 Year/Total:
0.733
Farhad Shirini
Farhad Shirini
University of Guilan
University of Guilan
Iran
Natural Sciences / Chemical Sciences
Organic Chemistry
i10 Productivity Rankings
University / Institution:
# 3
Country:
# 386
Region:
# 6,852
World:
# 33,821
i10 Index
Total:
230
Last 6 Year:
131
Last 6 Year/Total:
0.570
H-Index
Total:
45
Last 6 Year:
30
Last 6 Year/Total:
0.667
Citation
Total:
8,316
Last 6 Year:
3,834
Last 6 Year/Total:
0.461
Ehsan Kazemnezhad Leyli
Ehsan Kazemnezhad Leyli
Guilan University of Medical Sciences Rasht
Guilan University of Medical Sciences Rasht
Iran
Others
categorical data analysis
regression modeling
Biostatitics
i10 Productivity Rankings
University / Institution:
# 1
Country:
# 454
Region:
# 7,934
World:
# 39,279
i10 Index
Total:
151
Last 6 Year:
122
Last 6 Year/Total:
0.808
H-Index
Total:
33
Last 6 Year:
25
Last 6 Year/Total:
0.758
Citation
Total:
4,601
Last 6 Year:
3,201
Last 6 Year/Total:
0.696
Farahnaz Joukar
Farahnaz Joukar i
Guilan University of Medical Sciences Rasht
Guilan University of Medical Sciences Rasht
Iran
Medical and Health Sciences / Epidemiology and Public Health
i10 Productivity Rankings
University / Institution:
# 2
Country:
# 561
Region:
# 9,451
World:
# 47,117
i10 Index
Total:
139
Last 6 Year:
111
Last 6 Year/Total:
0.799
H-Index
Total:
52
Last 6 Year:
47
Last 6 Year/Total:
0.904
Citation
Total:
32,538
Last 6 Year:
31,399
Last 6 Year/Total:
0.965
Fariborz Mansour Ghanaei
Fariborz Mansour Ghanaei i
Guilan University of Medical Sciences Rasht
Guilan University of Medical Sciences Rasht
Iran
Medical and Health Sciences / Gastroenterology
i10 Productivity Rankings
University / Institution:
# 3
Country:
# 585
Region:
# 9,759
World:
# 48,583
i10 Index
Total:
154
Last 6 Year:
109
Last 6 Year/Total:
0.708
H-Index
Total:
47
Last 6 Year:
38
Last 6 Year/Total:
0.809
Citation
Total:
18,768
Last 6 Year:
16,674
Last 6 Year/Total:
0.888
Hessam Rouhi
Hessam Rouhi
University of Guilan
University of Guilan
Iran
Engineering & Technology / Mechanical Engineering
Computational Mechanics
i10 Productivity Rankings
University / Institution:
# 4
Country:
# 1,030
Region:
# 15,413
World:
# 76,439
i10 Index
Total:
98
Last 6 Year:
85
Last 6 Year/Total:
0.867
H-Index
Total:
35
Last 6 Year:
27
Last 6 Year/Total:
0.771
Citation
Total:
3,807
Last 6 Year:
2,345
Last 6 Year/Total:
0.616
Majid Arvand
Majid Arvand
University of Guilan
University of Guilan
Iran
Natural Sciences / Chemical Sciences
Electrochemistry
i10 Productivity Rankings
University / Institution:
# 5
Country:
# 1,179
Region:
# 17,280
World:
# 85,602
i10 Index
Total:
124
Last 6 Year:
79
Last 6 Year/Total:
0.637
H-Index
Total:
40
Last 6 Year:
27
Last 6 Year/Total:
0.675
Citation
Total:
4,851
Last 6 Year:
2,732
Last 6 Year/Total:
0.563
Hamid Arazi
Hamid Arazi
University of Guilan
University of Guilan
Iran
Education / Physical Education and Sport Science
Exercise Science
Resistance Training
Nutritional Supplements
Muscle-Organ Crosstalk
Health
i10 Productivity Rankings
University / Institution:
# 6
Country:
# 1,185
Region:
# 17,351
World:
# 86,011
i10 Index
Total:
105
Last 6 Year:
79
Last 6 Year/Total:
0.752
H-Index
Total:
35
Last 6 Year:
29
Last 6 Year/Total:
0.829
Citation
Total:
4,366
Last 6 Year:
3,168
Last 6 Year/Total:
0.726
Jalil Jaafari
Jalil Jaafari i
Guilan University of Medical Sciences Rasht
Guilan University of Medical Sciences Rasht
Iran
Engineering & Technology / Environmental Science & Engineering
Environmental engineering
Air pollution
wastewater treatment
waste managment
i10 Productivity Rankings
University / Institution:
# 4
Country:
# 1,319
Region:
# 18,776
World:
# 92,760
i10 Index
Total:
79
Last 6 Year:
76
Last 6 Year/Total:
0.962
H-Index
Total:
47
Last 6 Year:
41
Last 6 Year/Total:
0.872
Citation
Total:
21,337
Last 6 Year:
20,541
Last 6 Year/Total:
0.963
Adscientificindex
Adscientificindex

Click for INSTITUTIONAL BULK REGISTRATION and PREMIUM MEMBERSHIP advantages

Jafar Biazar J Biazar
Jafar Biazar J Biazar
University of Guilan
University of Guilan
Iran
Natural Sciences / Mathematical Sciences
Numerical Analysis
Numerical solution of functionl equations
i10 Productivity Rankings
University / Institution:
# 7
Country:
# 1,509
Region:
# 21,207
World:
# 104,368
i10 Index
Total:
118
Last 6 Year:
70
Last 6 Year/Total:
0.593
H-Index
Total:
45
Last 6 Year:
29
Last 6 Year/Total:
0.644
Citation
Total:
6,800
Last 6 Year:
2,668
Last 6 Year/Total:
0.392
Nosrat O Mahmoodi
Nosrat O Mahmoodi
University of Guilan
University of Guilan
Iran
Medical and Health Sciences / Pharmacy & Pharmaceutical Sciences
Desigen and Synthesis of photochromic compounds and considering behaviour and application
Pharmaceutical Chemistry and Natura
i10 Productivity Rankings
University / Institution:
# 8
Country:
# 1,592
Region:
# 22,234
World:
# 109,066
i10 Index
Total:
127
Last 6 Year:
68
Last 6 Year/Total:
0.535
H-Index
Total:
35
Last 6 Year:
22
Last 6 Year/Total:
0.629
Citation
Total:
3,999
Last 6 Year:
2,065
Last 6 Year/Total:
0.516
Mehryar Habibi Roudkenar
Mehryar Habibi Roudkenar
Guilan University of Medical Sciences Rasht
Guilan University of Medical Sciences Rasht
Iran
Natural Sciences / Molecular Biology & Genetics
Cancer
stem cell
oxidative stress
Recombinant DNA technology
Mitochondria
i10 Productivity Rankings
University / Institution:
# 5
Country:
# 1,683
Region:
# 23,423
World:
# 114,835
i10 Index
Total:
94
Last 6 Year:
66
Last 6 Year/Total:
0.702
H-Index
Total:
35
Last 6 Year:
25
Last 6 Year/Total:
0.714
Citation
Total:
3,842
Last 6 Year:
2,246
Last 6 Year/Total:
0.585
Navid Ghavi Hossein Zadeh
Navid Ghavi Hossein Zadeh
University of Guilan
University of Guilan
Iran
Medical and Health Sciences / Veterinary Sciences
Animal Breeding and Genetics
i10 Productivity Rankings
University / Institution:
# 9
Country:
# 1,774
Region:
# 24,687
World:
# 120,886
i10 Index
Total:
82
Last 6 Year:
64
Last 6 Year/Total:
0.780
H-Index
Total:
28
Last 6 Year:
20
Last 6 Year/Total:
0.714
Citation
Total:
2,656
Last 6 Year:
1,739
Last 6 Year/Total:
0.655
Manouchehr Mamaghani
Manouchehr Mamaghani
University of Guilan
University of Guilan
Iran
Natural Sciences / Chemical Sciences
Organic Synthesis
Synthesis of Heterocycles
Biotransformation
Multicomponent reactions
i10 Productivity Rankings
University / Institution:
# 10
Country:
# 1,808
Region:
# 25,152
World:
# 122,948
i10 Index
Total:
103
Last 6 Year:
63
Last 6 Year/Total:
0.612
H-Index
Total:
36
Last 6 Year:
22
Last 6 Year/Total:
0.611
Citation
Total:
3,605
Last 6 Year:
1,701
Last 6 Year/Total:
0.472
Ali Ghanadzadeh Gilani
Ali Ghanadzadeh Gilani
University of Guilan
University of Guilan
Iran
Natural Sciences / Chemical Sciences
Physical Chemistry
Material Chemistry
Solution Chemistry
Optical Materials
Liquid Crystals
i10 Productivity Rankings
University / Institution:
# 11
Country:
# 1,860
Region:
# 25,751
World:
# 125,530
i10 Index
Total:
124
Last 6 Year:
62
Last 6 Year/Total:
0.500
H-Index
Total:
38
Last 6 Year:
20
Last 6 Year/Total:
0.526
Citation
Total:
4,218
Last 6 Year:
1,725
Last 6 Year/Total:
0.409
Mohammad Ali Zanjanchi
Mohammad Ali Zanjanchi
University of Guilan
University of Guilan
Iran
Engineering & Technology / Environmental Science & Engineering
Environmental Analytical Chemistry
i10 Productivity Rankings
University / Institution:
# 12
Country:
# 1,938
Region:
# 26,438
World:
# 128,936
i10 Index
Total:
107
Last 6 Year:
61
Last 6 Year/Total:
0.570
H-Index
Total:
38
Last 6 Year:
22
Last 6 Year/Total:
0.579
Citation
Total:
3,993
Last 6 Year:
1,609
Last 6 Year/Total:
0.403
Hossein Hamedi
Hossein Hamedi
University of Guilan
University of Guilan
Iran
Engineering & Technology / Civil Engineering
Pavement Engineering
Asphalt Materials
i10 Productivity Rankings
University / Institution:
# 13
Country:
# 2,176
Region:
# 29,284
World:
# 141,735
i10 Index
Total:
58
Last 6 Year:
58
Last 6 Year/Total:
1.000
H-Index
Total:
29
Last 6 Year:
28
Last 6 Year/Total:
0.966
Citation
Total:
2,932
Last 6 Year:
2,293
Last 6 Year/Total:
0.782
Jalal Jalali Sendi
Jalal Jalali Sendi
University of Guilan
University of Guilan
Iran
Natural Sciences / Biological Science
Insect Immunology
Natural Products
Cell lines
i10 Productivity Rankings
University / Institution:
# 14
Country:
# 2,195
Region:
# 29,516
World:
# 143,083
i10 Index
Total:
82
Last 6 Year:
57
Last 6 Year/Total:
0.695
H-Index
Total:
31
Last 6 Year:
25
Last 6 Year/Total:
0.806
Citation
Total:
3,305
Last 6 Year:
1,932
Last 6 Year/Total:
0.585
Mahyar Arabani
Mahyar Arabani
University of Guilan
University of Guilan
Iran
Engineering & Technology / Civil Engineering
Asphalt Road material Geotechnics
i10 Productivity Rankings
University / Institution:
# 15
Country:
# 2,270
Region:
# 30,433
World:
# 147,735
i10 Index
Total:
68
Last 6 Year:
56
Last 6 Year/Total:
0.824
H-Index
Total:
29
Last 6 Year:
26
Last 6 Year/Total:
0.897
Citation
Total:
3,435
Last 6 Year:
2,402
Last 6 Year/Total:
0.699
Hassan Daneshmandi
Hassan Daneshmandi
University of Guilan
University of Guilan
Iran
Others
i10 Productivity Rankings
University / Institution:
# 16
Country:
# 2,312
Region:
# 30,947
World:
# 149,803
i10 Index
Total:
103
Last 6 Year:
55
Last 6 Year/Total:
0.534
H-Index
Total:
28
Last 6 Year:
18
Last 6 Year/Total:
0.643
Citation
Total:
3,117
Last 6 Year:
1,521
Last 6 Year/Total:
0.488
Zahra Atrkar Roushan
Zahra Atrkar Roushan
Guilan University of Medical Sciences Rasht
Guilan University of Medical Sciences Rasht
Iran
Others
survival cancer
i10 Productivity Rankings
University / Institution:
# 6
Country:
# 2,381
Region:
# 31,890
World:
# 154,399
i10 Index
Total:
81
Last 6 Year:
54
Last 6 Year/Total:
0.667
H-Index
Total:
28
Last 6 Year:
21
Last 6 Year/Total:
0.750
Citation
Total:
2,858
Last 6 Year:
1,746
Last 6 Year/Total:
0.611
Nader Nariman Zadeh
Nader Nariman Zadeh
University of Guilan
University of Guilan
Iran
Engineering & Technology / Mechanical Engineering
Multiobjective optimization
Optimal control
Neural network
Genetic programming
Computational intelligence
i10 Productivity Rankings
University / Institution:
# 17
Country:
# 2,531
Region:
# 33,682
World:
# 162,811
i10 Index
Total:
79
Last 6 Year:
52
Last 6 Year/Total:
0.658
H-Index
Total:
36
Last 6 Year:
23
Last 6 Year/Total:
0.639
Citation
Total:
4,322
Last 6 Year:
1,716
Last 6 Year/Total:
0.397
Smrozati
Smrozati
University of Guilan
University of Guilan
Iran
Natural Sciences / Physics
Physics of Thin Films
Transparent Conductive Oxides
Materials Science & Nanotechnology
Gas
i10 Productivity Rankings
University / Institution:
# 18
Country:
# 2,535
Region:
# 33,725
World:
# 163,084
i10 Index
Total:
75
Last 6 Year:
52
Last 6 Year/Total:
0.693
H-Index
Total:
30
Last 6 Year:
24
Last 6 Year/Total:
0.800
Citation
Total:
3,129
Last 6 Year:
1,770
Last 6 Year/Total:
0.566
Seyed Masoud Moghaddas Tafreshi
Seyed Masoud Moghaddas Tafreshi
University of Guilan
University of Guilan
Iran
Engineering & Technology / Electrical & Electronic Engineering
Distributed Energy Resources
Renewable Energy Systems
Energy Management
Smart Grid
Microgrid
i10 Productivity Rankings
University / Institution:
# 19
Country:
# 2,717
Region:
# 35,602
World:
# 172,113
i10 Index
Total:
72
Last 6 Year:
50
Last 6 Year/Total:
0.694
H-Index
Total:
33
Last 6 Year:
24
Last 6 Year/Total:
0.727
Citation
Total:
4,567
Last 6 Year:
2,317
Last 6 Year/Total:
0.507
AD Scientific Index - World Scientists i10 Productivity Rankings - 2024 i10 INDEX H INDEX CITATION
University Country Region World Name Country University / Institution Subject Total Last 6 Year Last 6 year/total Total Last 6 year Last 6 year/total Total Last 6 year Last 6 year/total
1 17 398 1,805
Reza AnsariReza Ansari
Iran Iran University of Guilan University of Guilan Engineering & Technology / Mechanical Engineering

Computational Mechanics | Numerical Analysis | Continuum Mechanics | Nano- | Micro- and Macro-mechanics |

538 458 0.851 77 57 0.740 24,989 15,833 0.634
2 115 2,239 10,698
Mohammad MirzazadehMohammad Mirzazadeh
Iran Iran University of Guilan University of Guilan Natural Sciences / Mathematical Sciences

Mathematical Physics | Nonlinear PDEs | Exact solutions | Solitons |

253 222 0.877 69 60 0.870 14,281 10,474 0.733
3 386 6,852 33,821
Farhad ShiriniFarhad Shirini
Iran Iran University of Guilan University of Guilan Natural Sciences / Chemical Sciences

Organic Chemistry |

230 131 0.570 45 30 0.667 8,316 3,834 0.461
1 454 7,934 39,279
Ehsan Kazemnezhad LeyliEhsan Kazemnezhad Leyli
Iran Iran Guilan University of Medical Sciences Rasht Guilan University of Medical Sciences Rasht Others

categorical data analysis | regression modeling | Biostatitics |

151 122 0.808 33 25 0.758 4,601 3,201 0.696
2 561 9,451 47,117
Farahnaz JoukarFarahnaz Joukar i
Iran Iran Guilan University of Medical Sciences Rasht Guilan University of Medical Sciences Rasht Medical and Health Sciences / Epidemiology and Public Health

139 111 0.799 52 47 0.904 32,538 31,399 0.965
3 585 9,759 48,583
Fariborz Mansour GhanaeiFariborz Mansour Ghanaei i
Iran Iran Guilan University of Medical Sciences Rasht Guilan University of Medical Sciences Rasht Medical and Health Sciences / Gastroenterology

154 109 0.708 47 38 0.809 18,768 16,674 0.888
4 1,030 15,413 76,439
Hessam RouhiHessam Rouhi
Iran Iran University of Guilan University of Guilan Engineering & Technology / Mechanical Engineering

Computational Mechanics |

98 85 0.867 35 27 0.771 3,807 2,345 0.616
5 1,179 17,280 85,602
Majid ArvandMajid Arvand
Iran Iran University of Guilan University of Guilan Natural Sciences / Chemical Sciences

Electrochemistry |

124 79 0.637 40 27 0.675 4,851 2,732 0.563
6 1,185 17,351 86,011
Hamid AraziHamid Arazi
Iran Iran University of Guilan University of Guilan Education / Physical Education and Sport Science

Exercise Science | Resistance Training | Nutritional Supplements | Muscle-Organ Crosstalk | Health |

105 79 0.752 35 29 0.829 4,366 3,168 0.726
4 1,319 18,776 92,760
Jalil JaafariJalil Jaafari i
Iran Iran Guilan University of Medical Sciences Rasht Guilan University of Medical Sciences Rasht Engineering & Technology / Environmental Science & Engineering

Environmental engineering | Air pollution | wastewater treatment | waste managment |

79 76 0.962 47 41 0.872 21,337 20,541 0.963
Adscientificindex

Click for INSTITUTIONAL BULK REGISTRATION and PREMIUM MEMBERSHIP advantages

 Adscientificindex
7 1,509 21,207 104,368
Jafar Biazar J BiazarJafar Biazar J Biazar
Iran Iran University of Guilan University of Guilan Natural Sciences / Mathematical Sciences

Numerical Analysis | Numerical solution of functionl equations |

118 70 0.593 45 29 0.644 6,800 2,668 0.392
8 1,592 22,234 109,066
Nosrat O MahmoodiNosrat O Mahmoodi
Iran Iran University of Guilan University of Guilan Medical and Health Sciences / Pharmacy & Pharmaceutical Sciences

Desigen and Synthesis of photochromic compounds and considering behaviour and application | Pharmaceutical Chemistry and Natura |

127 68 0.535 35 22 0.629 3,999 2,065 0.516
5 1,683 23,423 114,835
Mehryar Habibi RoudkenarMehryar Habibi Roudkenar
Iran Iran Guilan University of Medical Sciences Rasht Guilan University of Medical Sciences Rasht Natural Sciences / Molecular Biology & Genetics

Cancer | stem cell | oxidative stress | Recombinant DNA technology | Mitochondria |

94 66 0.702 35 25 0.714 3,842 2,246 0.585
9 1,774 24,687 120,886
Navid Ghavi Hossein ZadehNavid Ghavi Hossein Zadeh
Iran Iran University of Guilan University of Guilan Medical and Health Sciences / Veterinary Sciences

Animal Breeding and Genetics |

82 64 0.780 28 20 0.714 2,656 1,739 0.655
10 1,808 25,152 122,948
Manouchehr MamaghaniManouchehr Mamaghani
Iran Iran University of Guilan University of Guilan Natural Sciences / Chemical Sciences

Organic Synthesis | Synthesis of Heterocycles | Biotransformation | Multicomponent reactions |

103 63 0.612 36 22 0.611 3,605 1,701 0.472
11 1,860 25,751 125,530
Ali Ghanadzadeh GilaniAli Ghanadzadeh Gilani
Iran Iran University of Guilan University of Guilan Natural Sciences / Chemical Sciences

Physical Chemistry | Material Chemistry | Solution Chemistry | Optical Materials | Liquid Crystals |

124 62 0.500 38 20 0.526 4,218 1,725 0.409
12 1,938 26,438 128,936
Mohammad Ali ZanjanchiMohammad Ali Zanjanchi
Iran Iran University of Guilan University of Guilan Engineering & Technology / Environmental Science & Engineering

Environmental Analytical Chemistry |

107 61 0.570 38 22 0.579 3,993 1,609 0.403
13 2,176 29,284 141,735
Hossein HamediHossein Hamedi
Iran Iran University of Guilan University of Guilan Engineering & Technology / Civil Engineering

Pavement Engineering | Asphalt Materials |

58 58 1.000 29 28 0.966 2,932 2,293 0.782
14 2,195 29,516 143,083
Jalal Jalali SendiJalal Jalali Sendi
Iran Iran University of Guilan University of Guilan Natural Sciences / Biological Science

Insect Immunology | Natural Products | Cell lines |

82 57 0.695 31 25 0.806 3,305 1,932 0.585
15 2,270 30,433 147,735
Mahyar ArabaniMahyar Arabani
Iran Iran University of Guilan University of Guilan Engineering & Technology / Civil Engineering

Asphalt Road material Geotechnics |

68 56 0.824 29 26 0.897 3,435 2,402 0.699
16 2,312 30,947 149,803
Hassan DaneshmandiHassan Daneshmandi
Iran Iran University of Guilan University of Guilan Others

103 55 0.534 28 18 0.643 3,117 1,521 0.488
6 2,381 31,890 154,399
Zahra Atrkar RoushanZahra Atrkar Roushan
Iran Iran Guilan University of Medical Sciences Rasht Guilan University of Medical Sciences Rasht Others

survival cancer |

81 54 0.667 28 21 0.750 2,858 1,746 0.611
17 2,531 33,682 162,811
Nader Nariman ZadehNader Nariman Zadeh
Iran Iran University of Guilan University of Guilan Engineering & Technology / Mechanical Engineering

Multiobjective optimization | Optimal control | Neural network | Genetic programming | Computational intelligence |

79 52 0.658 36 23 0.639 4,322 1,716 0.397
18 2,535 33,725 163,084
SmrozatiSmrozati
Iran Iran University of Guilan University of Guilan Natural Sciences / Physics

Physics of Thin Films | Transparent Conductive Oxides | Materials Science & Nanotechnology | Gas |

75 52 0.693 30 24 0.800 3,129 1,770 0.566
19 2,717 35,602 172,113
Seyed Masoud Moghaddas TafreshiSeyed Masoud Moghaddas Tafreshi
Iran Iran University of Guilan University of Guilan Engineering & Technology / Electrical & Electronic Engineering

Distributed Energy Resources | Renewable Energy Systems | Energy Management | Smart Grid | Microgrid |

72 50 0.694 33 24 0.727 4,567 2,317 0.507