World's Best Scientists 2026 revealed!

D-Index & Metrics

Electronics and Electrical Engineering

D-Index
34
Citations
5738
World Ranking
5740
National Ranking
244

Robert P. Ryan publication distribution in Electronics and Electrical Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Electronics and Electrical Engineering in 2026. The highlighted bar marks where Robert P. Ryan sits on this spectrum.

34–53 publications: 24 scientists 54–73 publications: 52 scientists 74–93 publications: 114 scientists 94–113 publications: 203 scientists 114–133 publications: 269 scientists 134–153 publications: 355 scientists 154–173 publications: 403 scientists 174–193 publications: 445 scientists 194–213 publications: 430 scientists 214–233 publications: 431 scientists 234–253 publications: 399 scientists 254–273 publications: 366 scientists 274–293 publications: 335 scientists 294–313 publications: 300 scientists 314–333 publications: 276 scientists 334–353 publications: 250 scientists 354–373 publications: 214 scientists 374–393 publications: 187 scientists 394–413 publications: 152 scientists 414–433 publications: 169 scientists 434–453 publications: 147 scientists 454–473 publications: 111 scientists 474–493 publications: 117 scientists 494–513 publications: 103 scientists 514–533 publications: 99 scientists 534–553 publications: 92 scientists 554–573 publications: 75 scientists 574–593 publications: 58 scientists 594–613 publications: 69 scientists 614–633 publications: 50 scientists 634–653 publications: 62 scientists 654–673 publications: 54 scientists 674–693 publications: 44 scientists 694–713 publications: 37 scientists 714–733 publications: 28 scientists 734–753 publications: 26 scientists 754–773 publications: 26 scientists 774–793 publications: 19 scientists 794–813 publications: 23 scientists 814–833 publications: 20 scientists 834–853 publications: 16 scientists 854–873 publications: 20 scientists 874–893 publications: 11 scientists 894–913 publications: 11 scientists 914–933 publications: 16 scientists 934–953 publications: 13 scientists 954–973 publications: 10 scientists 974–993 publications: 11 scientists 994–1,013 publications: 9 scientists 1,014–1,033 publications: 9 scientists 1,034–1,053 publications: 10 scientists 1,054–1,064 publications: 6 scientists 1,065+ publications: 99 scientists
34 publications 1,065+

This scientist: 52 publications — 1st percentile

1% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,065 publications or more.

Robert P. Ryan D-index placement in Electronics and Electrical Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Electronics and Electrical Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Robert P. Ryan sits on this spectrum.

30 D-Index: 178 scientists 31 D-Index: 257 scientists 32 D-Index: 263 scientists 33 D-Index: 262 scientists 34 D-Index: 244 scientists 35 D-Index: 236 scientists 36 D-Index: 211 scientists 37 D-Index: 220 scientists 38 D-Index: 214 scientists 39 D-Index: 214 scientists 40 D-Index: 205 scientists 41 D-Index: 187 scientists 42 D-Index: 194 scientists 43 D-Index: 201 scientists 44 D-Index: 155 scientists 45 D-Index: 189 scientists 46 D-Index: 148 scientists 47 D-Index: 160 scientists 48 D-Index: 134 scientists 49 D-Index: 130 scientists 50 D-Index: 141 scientists 51 D-Index: 156 scientists 52 D-Index: 108 scientists 53 D-Index: 130 scientists 54 D-Index: 112 scientists 55 D-Index: 97 scientists 56 D-Index: 111 scientists 57 D-Index: 102 scientists 58 D-Index: 108 scientists 59 D-Index: 120 scientists 60 D-Index: 103 scientists 61 D-Index: 93 scientists 62 D-Index: 92 scientists 63 D-Index: 74 scientists 64 D-Index: 77 scientists 65 D-Index: 73 scientists 66 D-Index: 64 scientists 67 D-Index: 69 scientists 68 D-Index: 60 scientists 69 D-Index: 39 scientists 70 D-Index: 57 scientists 71 D-Index: 59 scientists 72 D-Index: 46 scientists 73 D-Index: 49 scientists 74 D-Index: 38 scientists 75 D-Index: 35 scientists 76 D-Index: 32 scientists 77 D-Index: 35 scientists 78 D-Index: 31 scientists 79 D-Index: 22 scientists 80 D-Index: 34 scientists 81 D-Index: 31 scientists 82 D-Index: 34 scientists 83 D-Index: 23 scientists 84 D-Index: 18 scientists 85 D-Index: 30 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 20 scientists 89 D-Index: 8 scientists 90 D-Index: 17 scientists 91 D-Index: 7 scientists 92 D-Index: 14 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 12 scientists 97 D-Index: 10 scientists 98 D-Index: 10 scientists 99 D-Index: 12 scientists 100 D-Index: 16 scientists 101 D-Index: 5 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 8 scientists 105 D-Index: 9 scientists 106 D-Index: 13 scientists 107 D-Index: 4 scientists 108 D-Index: 5 scientists 109 D-Index: 10 scientists 110 D-Index: 8 scientists 111+ D-Index: 96 scientists
30 D-Index 111+

This scientist: 34 D-Index — 18th percentile

18% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 111 D-Index or more.

Overview

What is he best known for?

The fields of study he is best known for:

  • Electrical engineering
  • Mechanical engineering
  • Voltage

His primary scientific interests are in Control theory, Actuator, Electromagnetic coil, Signal and Rotor. His Actuator study incorporates themes from Voice coil, Detector and Head. Electromagnetic coil is closely attributed to Voltage in his research.

His Voltage study improves the overall literature in Electrical engineering. The concepts of his Signal study are interwoven with issues in Disk controller, Power loss and Line. The Rotor study combines topics in areas such as Angular displacement, Torque and Spinning.

His most cited work include:

  • Disk drive employing seek time vcm ir voltage calibration for velocity control of an actuator arm (137 citations)
  • Self-heating disk drive (136 citations)
  • Disk drive employing method of spinning down its spindle motor to reduce the time required for spinning it down and subsequently spinning it up (133 citations)

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

His scientific interests lie mostly in Control theory, Voltage, Electrical engineering, Electromagnetic coil and Head. His work deals with themes such as Signal, Spin-up and Rotor, which intersect with Control theory. His Voltage research includes themes of Voice coil, Compensation, Limit and Current.

The concepts of his Electrical engineering study are interwoven with issues in Hammer and Controller. The various areas that Robert P. Ryan examines in his Electromagnetic coil study include Stator, Transistor, Magnet and Angular displacement. Within one scientific family, he focuses on topics pertaining to Brake under Head, and may sometimes address concerns connected to Pulse and Pulse period.

He most often published in these fields:

  • Control theory (40.91%)
  • Voltage (34.85%)
  • Electrical engineering (31.82%)

What were the highlights of his more recent work (between 2014-2021)?

  • Computer data storage (9.09%)
  • Controller (15.15%)
  • Nozzle (4.55%)

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

Robert P. Ryan spends much of his time researching Computer data storage, Controller, Nozzle, Plastics extrusion and Signal. The study incorporates disciplines such as Transmission, Printed circuit board and Electrical engineering in addition to Computer data storage. His study involves Voltage, Voltage source, Supply current and Current, a branch of Electrical engineering.

Robert P. Ryan interconnects Optical Module, Chassis, Electrical switching and Optical path in the investigation of issues within Controller. His Signal research incorporates elements of Process, Backplane, Actuator and Enclosure. His work carried out in the field of Engineering drawing brings together such families of science as Acoustics and Head.

Between 2014 and 2021, his most popular works were:

  • Extruder for three-dimensional additive printer (16 citations)
  • Data storage assembly for archive cold storage (15 citations)
  • Rotation and nozzle opening control of extruders in printing systems (5 citations)

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

  • Electrical engineering
  • Mechanical engineering
  • Voltage

The scientist’s investigation covers issues in Mechanical engineering, Nozzle, Plastics extrusion, Engineering drawing and Edge. Much of his study explores Engineering drawing relationship to Body orifice. Robert P. Ryan integrates many fields, such as Edge and engineering, in his works.

Best Publications

  • Self-heating disk drive

    Robert P. Ryan;Dalwinder Singh

  • Disk drive employing seek time vcm ir voltage calibration for velocity control of an actuator arm

    Robert P. Ryan

  • Disk drive employing method of spinning down its spindle motor to reduce the time required for spinning it down and subsequently spinning it up

    Raffi Codilian;Steven Nemshick;Robert P. Ryan

  • Disk drive comprising spin down circuitry having a programmable signal generator for enhancing power and braking control

    George J. Bennett;Robert P. Ryan

  • Disk drive comprising an actuator driver circuit for retracting a head independent of a servo microprocessor when a spindle speed fault mode is detected

    Robert P. Ryan

  • Disk drive including a delay circuit to provide a delayed reset signal

    William B. Boyle;Robert P. Ryan

  • Disk drive employing adaptive feed-forward vibration compensation to enhance a retry operation

    Robert P. Ryan

  • Disk drive employing method of spinning down its spindle motor to reduce the time required for subsequently spinning it up

    Raffi Codilian;Terry C. Dawson;Carl R. Messenger;Steven Nemshick

  • Disk drive employing VCM demand current to calibrate VCM IR voltage for velocity control of an actuator arm

    Robert P. Ryan

  • Disk drive comprising a demand limit circuit for enhancing power management during spin down

    George J. Bennett;Robert P. Ryan

  • System and method to reduce write splice failures

    Robert P. Ryan;Robert M. Fallone

  • Systems and methods for data throttling during disk drive power down

    George J. Bennett;Steven R. Vasquez;Robert P. Ryan

  • Disk drive monitoring a supply current to protect motor driver circuits

    Robert P. Ryan

  • Disk drive comprising VCM stall detector for velocity control of an actuator arm

    Robert P. Ryan

  • Disk drive comprising a pulse width modulated demand limit circuit for enhancing power management during spin-down

    George J. Bennett;Robert P. Ryan

  • Adaptive shock detection

    Robert P. Ryan;Don Brunnett;Alain Chahwan;Duc T. Phan

  • Decreasing spin up time in a disk drive by adjusting a duty cycle of a spindle motor PWM signal to maintain constant average input current

    George J. Bennett;Robert P. Ryan

  • Disk drive comprising an offset-nulling amplifier for detecting a back EMF voltage of a voice coil motor

    Norman D. Gardner;Robert P. Ryan

  • Disk drive employing active braking using inductive sense

    Robert P. Ryan

  • Disk drive comprising a programmable inverting voltage regulator configured relative to the disk drive's mode of operation

    Timothy A. Ferris;Robert P. Ryan

Frequent Co-Authors

George J. Bennett
George J. Bennett Optimal Motion
Raffi Codilian
Raffi Codilian Western Digital (Japan)

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