World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
61
Citations
15914
World Ranking
2017
National Ranking
643

James D. Ralph 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 James D. Ralph 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: 94 publications — 7th percentile

7% of scientists in this discipline score the same or lower.

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

James D. Ralph 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 James D. Ralph 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: 61 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

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

Overview

What is he best known for?

The fields of study he is best known for:

  • Mechanical engineering
  • Structural engineering
  • Surgery

James D. Ralph mainly focuses on Structural engineering, Composite material, Pedicle screw, Screw head and Motion preservation. In the subject of general Structural engineering, his work in Nut is often linked to Spacer device, thereby combining diverse domains of study. His work in Composite material covers topics such as Engineering drawing which are related to areas like Ball, Compression, Orthopedic implant and Varying thickness.

He has included themes like Threading and Collar in his Screw head study. As a part of the same scientific family, he mostly works in the field of Collar, focusing on Lock and, on occasion, Transverse plane, Bone screws and Fixation. His research integrates issues of Coupling and Screw in his study of Head.

His most cited work include:

  • Surgical fasteners and related implant devices having bioabsorbable components (647 citations)
  • Polyaxial pedicle screw having a threaded and tapered compression locking mechanism (412 citations)
  • Threaded polyaxial locking screw plate assembly (410 citations)

What are the main themes of his work throughout his whole career to date?

His scientific interests lie mostly in Structural engineering, Head, Composite material, Anatomy and Biomedical engineering. His Spring study, which is part of a larger body of work in Structural engineering, is frequently linked to Spacer device, bridging the gap between disciplines. The concepts of his Head study are interwoven with issues in Hook, Implant and Fixation.

His work in Composite material tackles topics such as Engineering drawing which are related to areas like Pedicle screw. His work in the fields of Anatomy, such as Skull and Intervertebral space, intersects with other areas such as Geology. Bone cutting is closely connected to Bone drilling in his research, which is encompassed under the umbrella topic of Biomedical engineering.

He most often published in these fields:

  • Structural engineering (45.67%)
  • Head (18.90%)
  • Composite material (18.11%)

What were the highlights of his more recent work (between 2005-2012)?

  • Biomedical engineering (15.75%)
  • Surgery (9.45%)
  • Autologous bone (4.72%)

In recent papers he was focusing on the following fields of study:

Biomedical engineering, Surgery, Autologous bone, Skull and Structural engineering are his primary areas of study. His Biomedical engineering research incorporates themes from Bone drilling, Drilling, Rotation and Implant. The various areas that he examines in his Implant study include Plastic materials, STAPLE DRIVER, Head and Self locking.

His biological study spans a wide range of topics, including Bone plate, Composite material and Groove. Composite material is frequently linked to Engineering drawing in his study. His study in the field of Cranial bone and Replantation is also linked to topics like Geology.

Between 2005 and 2012, his most popular works were:

  • Surgical fasteners and related implant devices having bioabsorbable components (647 citations)
  • Intervertebral spacer device (209 citations)
  • Adjustable bone plate (76 citations)

In his most recent research, the most cited papers focused on:

  • Mechanical engineering
  • Structural engineering
  • Surgery

James D. Ralph mainly investigates Implant, Dentistry, Biomedical engineering, Bone growth and Bone plate. The study incorporates disciplines such as STAPLE DRIVER, Surgical Fasteners, Head and Self locking in addition to Implant. His studies in Dentistry integrate themes in fields like Bone healing, Orthodontics, Bone screws and Clavicle.

His Biomedical engineering study frequently links to adjacent areas such as Plastic materials. His Bone plate study combines topics from a wide range of disciplines, such as Bending, Structural engineering, Process and Bone fixation. His research on Musculoskeletal trauma often connects related topics like Composite material.

Best Publications

  • Surgical fasteners and related implant devices having bioabsorbable components

    James D Ralph;Stephen L Tatar;Thomas N Troxell

  • Polyaxial pedicle screw having a threaded and tapered compression locking mechanism

    James D. Ralph;Stephen Tatar

  • Rod securing polyaxial locking screw and coupling element assembly

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Polyaxial pedicle screw

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Polyaxial pedicle screw having a rotating locking element

    James D. Ralph;Stephen Tatar

  • A modular polyaxial locking pedicle screw

    Joseph P. Errico;Thomas J. Errico;James D. Ralph;Steven Tatar

  • Intervertebral spacer device having a slotted domed arch strip spring

    James D. Ralph;Stephen Tatar;Joseph P. Errico

  • Selectively expandable sacral fixation screw-sleeve device

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Polyaxial mechanism for use with orthopaedic implant devices

    James D. Ralph;Steven Tatar

  • ARTIFICIAL INTERVERTEBRAL DISC HAVING CAPTURED BALL-SOCKET JOINT

    Errico Joseph P;Dudasik Michael;Zubok Rafail;Ralph James D

  • Polyaxial pedicle screw having a compression locking rod gripping mechanism

    Joseph P. Errico;Thomas J. Errico;James D. Ralph;Stephen Tatar

  • Intervertebral spacer device having a wave washer force restoring element

    James D. Ralph;Stephen Tatar;Joseph P. Errico

  • Polyaxial locking screw and coupling element

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Advanced polyaxial locking screw and coupling element device for use with rod fixation apparatus

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Side mounted polyaxial pedicle screw

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Polyaxial locking screw and coupling element assembly for use with side loading rod fixation apparatus

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Advanced polyaxial locking hook and coupling element device for use with side loading rod fixation devices

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

  • Porous interbody fusion device having integrated polyaxial locking interference screws

    Thomas J. Errico;James D. Ralph;Joseph P. Errico

  • Longitudinal plate assembly having an adjustable length

    James D. Ralph;Stephen Tatar

  • Polyaxial locking screw and coupling element assembly for use with rod fixation apparatus

    Joseph P. Errico;Thomas J. Errico;James D. Ralph

Frequent Co-Authors

Joseph P. Errico
Joseph P. Errico ElectroCore Inc.

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Best Scientists Citing James D. Ralph

Recently Published Articles