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Frey, H. Christopher

Frey, H. Christopher

United States Environmental Protection Agency, United States

2025 Rank: 79,348

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Engineering

SubField 1:

Environmental Engineering

SubField 2:

Logistics & Transportation

Rank in SubField 1: 437 out of 64,516 Researchers

Data For The Year: 2025
Metrics Self-Citations Excluded All
Rank Based on Composite Score79,34894,720
Total Cites431443
H-index99
Hm-index55
Number of Single Authored Papers1414
Total Cites to Single Authored Papers1111
Number of Single+First Authored Papers7272
Total Cites to Single+First Authored Papers175175
Number of Single+First+Last Authored Papers174174
Total Cites to Single+First+Last Authored Papers297301
Composite Score22
Number of Distinct Citing Papers369376
Ratio of Total Citations to Distinct Citing Papers 1.17 1.18
Self-Citation Percentage
2.71%
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Frey, H. Christopher

Frey, H. Christopher

United States Environmental Protection Agency, United States

2024 Rank: 83,758

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Engineering

SubField 1:

Environmental Engineering

SubField 2:

Logistics & Transportation

Rank in SubField 1: 469 out of 60,423 Researchers

Data For The Year: 2024
Metrics Self-Citations Excluded All
Rank Based on Composite Score83,75885,228
Total Cites413454
H-index89
Hm-index56
Number of Single Authored Papers1414
Total Cites to Single Authored Papers1111
Number of Single+First Authored Papers7272
Total Cites to Single+First Authored Papers146152
Number of Single+First+Last Authored Papers173173
Total Cites to Single+First+Last Authored Papers271299
Composite Score22
Number of Distinct Citing Papers351363
Ratio of Total Citations to Distinct Citing Papers 1.18 1.25
Self-Citation Percentage
9.03%
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Frey, H. Christopher

Frey, H. Christopher

NC State University, United States

2023 Rank: 68,085

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Engineering

SubField 1:

Environmental Engineering

SubField 2:

Logistics & Transportation

Rank in SubField 1: 407 out of 57,175 Researchers

Data For The Year: 2023
Metrics Self-Citations Excluded All
Rank Based on Composite Score68,08576,933
Total Cites466497
H-index1010
Hm-index66
Number of Single Authored Papers1212
Total Cites to Single Authored Papers1010
Number of Single+First Authored Papers7070
Total Cites to Single+First Authored Papers175175
Number of Single+First+Last Authored Papers160160
Total Cites to Single+First+Last Authored Papers306313
Composite Score22
Number of Distinct Citing Papers363374
Ratio of Total Citations to Distinct Citing Papers 1.28 1.33
Self-Citation Percentage
6.24%
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Frey, H. Christopher

Frey, H. Christopher

NC State University, United States

2022 Rank: 56,296

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Engineering

SubField 1:

Environmental Engineering

SubField 2:

Logistics & Transportation

Rank in SubField 1: 325 out of 54,000 Researchers

Data For The Year: 2022
Metrics Self-Citations Excluded All
Rank Based on Composite Score56,29657,126
Total Cites442513
H-index1011
Hm-index66
Number of Single Authored Papers1414
Total Cites to Single Authored Papers1718
Number of Single+First Authored Papers7272
Total Cites to Single+First Authored Papers155162
Number of Single+First+Last Authored Papers168168
Total Cites to Single+First+Last Authored Papers290325
Composite Score22
Number of Distinct Citing Papers341362
Ratio of Total Citations to Distinct Citing Papers 1.30 1.42
Self-Citation Percentage
13.84%
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Frey, H. Christopher

Frey, H. Christopher

NC State University, United States

2021 Rank: 58,052

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Engineering

SubField 1:

Environmental Engineering

SubField 2:

Logistics & Transportation

Rank in SubField 1: 359 out of 51,126 Researchers

Data For The Year: 2021
Metrics Self-Citations Excluded All
Rank Based on Composite Score58,05255,980
Total Cites636742
H-index1314
Hm-index78
Number of Single Authored Papers1414
Total Cites to Single Authored Papers1921
Number of Single+First Authored Papers7272
Total Cites to Single+First Authored Papers222236
Number of Single+First+Last Authored Papers164164
Total Cites to Single+First+Last Authored Papers415477
Composite Score33
Number of Distinct Citing Papers484524
Ratio of Total Citations to Distinct Citing Papers 1.31 1.42
Self-Citation Percentage
14.29%
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