World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
40
Citations
4882
World Ranking
7459
National Ranking
78

Chyi-How Lay publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Chyi-How Lay sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 87 publications — 5th percentile

5% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

Chyi-How Lay D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where Chyi-How Lay sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 40 D-Index — 27th percentile

27% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Overview

Chyi-How Lay is affiliated with Feng Chia University in Taiwan and specializes in engineering with a primary focus on biomedical engineering, renewable energy, sustainability and the environment, building and construction, mechanical engineering, and electrical and electronic engineering. Their research largely addresses topics related to anaerobic digestion and biogas production, algal biology and biofuel production, microbial fuel cells and bioremediation, supercapacitor materials and fabrication, biofuel production and bioconversion, wastewater treatment and nitrogen removal, and microbial metabolic engineering and bioproduction.

The scholar has contributed notably to several scientific publications. Among their recent papers are:

  • Review on sustainable production of biochar through hydrothermal liquefaction: Physico-chemical properties and applications (2020, Bioresource Technology)
  • Recent advanced biotechnological strategies to enhance photo-fermentative biohydrogen production by purple non-sulphur bacteria: An overview (2020, International Journal of Hydrogen Energy)
  • Sustainable biochar for advanced electrochemical/energy storage applications (2023, Journal of Energy Storage)
  • A critical review on global trends in biogas scenario with its up-gradation techniques for fuel cell and future perspectives (2020, International Journal of Hydrogen Energy)
  • Microalgae cultivation strategies using cost-effective nutrient sources: Recent updates and progress towards biofuel production (2022, Bioresource Technology)

They frequently publish in venues such as:

  • International Journal of Hydrogen Energy
  • Bioresource Technology
  • Processes
  • Clean Technologies and Environmental Policy
  • Process Safety and Environmental Protection

Chyi-How Lay's research collaborations include working multiple times with co-authors such as Gopalakrishnan Kumar, Pau Loke Show, Vinoth Kumar Ponnusamy, Peer Mohamed Abdul, and Chiu-Yue Lin.

Best Publications

  • A nutrient formulation for fermentative hydrogen production using anaerobic sewage sludge microflora

    C.Y. Lin;C.H. Lay

  • Fermentative hydrogen production from wastewaters: A review and prognosis

    Chiu Yue Lin;Chyi How Lay;Biswarup Sen;Chen Yeon Chu

  • Effects of carbonate and phosphate concentrations on hydrogen production using anaerobic sewage sludge microflora

    C.-Y Lin;C.H Lay

  • Review on sustainable production of biochar through hydrothermal liquefaction: Physico-chemical properties and applications.

    Vinoth Kumar Ponnusamy;Senthil Nagappan;Rahul R. Bhosale;Chyi How Lay

  • Recent insights into the cell immobilization technology applied for dark fermentative hydrogen production.

    Gopalakrishnan Kumar;Ackmez Mudhoo;Periyasamy Sivagurunathan;Dillirani Nagarajan

  • Biohydrogen production by dark fermentation: scaling-up and technologies integration for a sustainable system

    Estela Tapia-Venegas;Juan Esteban Ramirez-Morales;Fernando Silva-Illanes;Javiera Toledo-Alarcón;Javiera Toledo-Alarcón

  • Dark fermentative hydrogen production from lignocellulosic hydrolyzates – A review

    Marika E. Nissilä;Chyi-How Lay;Jaakko A. Puhakka

  • State of the art and future concept of food waste fermentation to bioenergy

    Biswarup Sen;J. Aravind;P. Kanmani;Chyi-How Lay

  • Sustainable biochar for advanced electrochemical/energy storage applications

    Unknown

  • Biohydrogen production from soluble condensed molasses fermentation using anaerobic fermentation

    Chyi-How Lay;Jou-Hsien Wu;Chin-Lang Hsiao;Jui-Jen Chang

  • Recent advanced biotechnological strategies to enhance photo-fermentative biohydrogen production by purple non-sulphur bacteria: An overview

    Ming Foong Tiang;Muhammad Alif Fitri Hanipa;Peer Mohamed Abdul;Jamaliah M.d. Jahim

  • Lipid accumulating microalgae cultivation in textile wastewater: Environmental parameters optimization

    Jane-Yii Wu;Chyi-How Lay;Chin-Chao Chen;Shin-Yan Wu

  • A pilot-scale high-rate biohydrogen production system with mixed microflora

    Chiu Yue Lin;Shu Yii Wu;Ping Jei Lin;Jo-Shu Chang

  • A critical review on global trends in biogas scenario with its up-gradation techniques for fuel cell and future perspectives

    Devaraj Thiruselvi;Ponnusamy Senthil Kumar;Madhava Anil Kumar;Chyi-How Lay

  • Hydrogen production by the anaerobic fermentation from acid hydrolyzed rice straw hydrolysate

    Alex C.C. Chang;Ying-Hsuan Tu;Ming-Hsiang Huang;Chyi-How Lay

  • Recent developments on alternative fuels, energy and environment for sustainability.

    Gopalakrishnan Kumar;Gopalakrishnan Kumar;Sang Hyoun Kim;Chyi How Lay;Vinoth Kumar Ponnusamy

  • Optimization of Hydrolysis-Acidogenesis Phase of Swine Manure for Biogas Production Using Two-Stage Anaerobic Fermentation

    Chiu-Yue Lin;Wai Siong Chai;Chyi-How Lay;Chin-Chao Chen

  • Fermentative biohydrogen production and its byproducts: A mini review of current technology developments

    Chiu-Yue Lin;Thi Mai-Linh Nguyen;Chen-Yeon Chu;Chen-Yeon Chu;Hoang-Jyh Leu;Hoang-Jyh Leu

  • High-efficiency hydrogen production by an anaerobic, thermophilic enrichment culture from an Icelandic hot spring

    Perttu E P Koskinen;Chyi-How Lay;Jaakko A Puhakka;Ping-Jei Lin

  • Electricity generation from swine wastewater in microbial fuel cell: Hydraulic reaction time effect

    Dongmei Ma;Zong-Hua Jiang;Chyi-How Lay;Dandan Zhou

  • Bioelectricity generation using microalgal biomass as electron donor in a bio-anode microbial fuel cell

    Fabrice Ndayisenga;Zhisen Yu;Yang Yu;Chyi-How Lay

  • Co-fermentation of water hyacinth and beverage wastewater in powder and pellet form for hydrogen production

    Chyi-How Lay;Biswarup Sen;Chin-Chao Chen;Jou-Hsien Wu

Frequent Co-Authors

Chiu-Yue Lin
Chiu-Yue Lin Feng Chia University
Gopalakrishnan Kumar
Gopalakrishnan Kumar Yonsei University
Jo Shu Chang
Jo Shu Chang National Cheng Kung University
Pau Loke Show
Pau Loke Show UCSI University
Jaakko A. Puhakka
Jaakko A. Puhakka Tampere University
Dinh Duc Nguyen
Dinh Duc Nguyen Kyonggi University
Wen-Hsiung Li
Wen-Hsiung Li Academia Sinica
Vinoth Kumar Ponnusamy
Vinoth Kumar Ponnusamy Kaohsiung Medical University
Eric Trably
Eric Trably INRAE : Institut national de recherche pour l'agriculture, l'alimentation et l'environnement
Arivalagan Pugazhendhi
Arivalagan Pugazhendhi Cape Breton University

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