All Stories

  1. Age-related changes in brain fiber pathways based on directional decomposition of DTI tractograms

    Article • Neuroscience Informatics, March 2026, Elsevier

    Professor Akimasa Hirata

  2. Ambient heat exposure as a risk factor for cataracts: Evidence from a nationwide claims-based study in Japan

    Article • Environmental Research, March 2026, Elsevier

    Professor Akimasa Hirata

  3. Effect of resting motor threshold availability on preoperative motor cortex localization using navigated-TMS in glioma surgery

    Article • Clinical Neurophysiology, January 2026, Elsevier

    Professor Akimasa Hirata

  4. Group-level and personalized optimization for the insula and hippocampus focal electric field in transcranial temporal interferential stimulation: A computational study

    Article • Computers in Biology and Medicine, January 2026, Elsevier

    Professor Akimasa Hirata

  5. Deep Learning-Based Multi-Lead ECG Reconstruction from Lead I with Metadata Integration and Uncertainty Estimation

    Article • Sensors, December 2025, MDPI AG

    Professor Akimasa Hirata

  6. Cortical surface electric field estimation for real-time TMS with graph neural networks

    Article • Physics in Medicine and Biology, November 2025, Institute of Physics Publishing

    Professor Akimasa Hirata

  7. Accurate localization of motor function using transcranial magnetic stimulation with segmentation-free head modeling in patients with brain tumors

    Article • Physics in Medicine and Biology, October 2025, Institute of Physics Publishing

    Professor Akimasa Hirata

  8. Model Variability in Assessment of Human Exposure to Radiofrequency Fields

    Article • October 2025, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  9. Tensor-Based SPFD Method for Accurate Low-Frequency Magnetic Field Dosimetry in Anatomical Models

    Article • Physics in Medicine and Biology, October 2025, Institute of Physics Publishing

    Professor Akimasa Hirata

  10. Diabetes as a risk factor for heatstroke: insights from a nationwide Japanese health insurance database

    Article • Environmental Science and Pollution Research, October 2025, Springer Science + Business Media

    Professor Akimasa Hirata

  11. Activation site estimation using induced current simulation and motor evoked potential latency in transcranial magnetic stimulation

    Article • Clinical Neurophysiology, September 2025, Elsevier

    Professor Akimasa Hirata

  12. Conformity Assessment of Human Exposed to Radiation From Millimeter-Wave Vehicles Radars

    Article • IEEE Journal of Microwaves, July 2025, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  13. SHARM: Segmented Head Anatomical Reference Models

    Article • Biomedical Signal Processing and Control, June 2025, Elsevier

    Professor Akimasa Hirata

  14. A novel transfer learning framework for non-uniform conductivity estimation with limited data in personalized brain stimulation

    Article • Physics in Medicine and Biology, May 2025, Institute of Physics Publishing

    Professor Akimasa Hirata

  15. Estimating the Perception Threshold of Electrostimulation and Heating for Radiofrequency Contact Current

    Article • IEEE Transactions on Electromagnetic Compatibility, April 2025, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  16. Predicting heat-related morbidity in Japan through integrated meteorological and behavioral factors

    Article • Environmental Challenges, April 2025, Elsevier

    Professor Akimasa Hirata

  17. Power absorption and temperature rise in deep learning based head models for local radiofrequency exposures

    Article • Physics in Medicine and Biology, March 2025, Institute of Physics Publishing

    Professor Akimasa Hirata

  18. Explainable multiscale temporal convolutional neural network model for sleep stage detection based on electroencephalogram activities

    Article • Journal of Neural Engineering, March 2025, Institute of Physics Publishing

    Professor Akimasa Hirata

  19. Recent Advances and Future Perspective in Computational Bioelectromagnetics for Exposure Assessments

    Article • Bioelectromagnetics, February 2025, Wiley

    Professor Akimasa Hirata

  20. Reducing lead requirements for wearable ECG: Chest lead reconstruction with 1D-CNN and Bi-LSTM

    Article • Informatics in Medicine Unlocked, January 2025, Elsevier

    Professor Akimasa Hirata

  21. Statistical analysis and machine learning of TMS-induced MEPs for predicting poststroke motor impairment and performance

    Article • Informatics in Medicine Unlocked, January 2025, Elsevier

    Professor Akimasa Hirata

  22. Model Variability in Assessment of Human Exposure to Radiofrequency Fields

    Article • IEEE Journal of Microwaves, January 2025, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  23. Gaps in Knowledge Relevant to the “ICNIRP Guidelines for Limiting Exposure to Time-Varying Electric, Magnetic and Electromagnetic Fields (100 kHz TO 300 GHz)”

    Article • Health Physics, December 2024, Wolters Kluwer Health

    Professor Akimasa Hirata

  24. Source Localization and Classification of Pulmonary Valve-Originated Electrocardiograms Using Volume Conductor Modeling with Anatomical Models

    Article • Biosensors, October 2024, MDPI AG

    Professor Akimasa Hirata

  25. Electric field envelope focality in superficial brain areas with linear alignment montage in temporal interference stimulation

    Article • Computers in Biology and Medicine, August 2024, Elsevier

    Professor Akimasa Hirata

  26. Validity of the 1984 Interim Guidelines on Airborne Ultrasound and Gaps in the Current Knowledge

    Article • Health Physics, May 2024, Wolters Kluwer Health

    Professor Akimasa Hirata

  27. Projection of future heat-related morbidity in three metropolitan prefectures of Japan based on large ensemble simulations of climate change under 2 °C global warming scenarios

    Article • Environmental Research, April 2024, Elsevier

    Professor Akimasa Hirata

  28. ICNIRP Statement on Short Wavelength Light Exposure from Indoor Artificial Sources and Human Health

    Article • Health Physics, April 2024, Wolters Kluwer Health

    Professor Akimasa Hirata

  29. Compliance Assessment of the Spatial Averaging Method for Magnetic Field Leakage from a Wireless Power Transfer System in Electric Vehicles

    Article • Applied Sciences, March 2024, MDPI AG

    Professor Akimasa Hirata

  30. Sensitivity of Electrocardiogram on Electrode-Pair Locations for Wearable Devices: Computational Analysis of Amplitude and Waveform Distortion

    Article • Biosensors, March 2024, MDPI AG

    Professor Akimasa Hirata

  31. High-resolution EEG source localization in personalized segmentation-free head model with multi-dipole fitting

    Article • Physics in Medicine and Biology, February 2024, Institute of Physics Publishing

    Professor Akimasa Hirata

  32. Dendritic Neural Network: A Novel Extension of Dendritic Neuron Model

    Article • IEEE Transactions on Emerging Topics in Computational Intelligence, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  33. Assessment of Whole-Body-Average SAR for Exposure to Electromagnetic Fields up to 30 GHz Using Body Model With Scaled Dielectric Parameters

    Article • IEEE Transactions on Electromagnetic Compatibility, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  34. Novel Inductively Coupled Wireless Power Transfer System Based on Modified Birdcage Coils for Torso Implanted Medical Devices

    Article • IEEE Transactions on Microwave Theory and Techniques, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  35. Differential impact of SARS-CoV-2 infection during different outbreak periods on incident diabetes in Japan: a matched cohort study utilizing health insurance claims

    Article • Environmental Health and Preventive Medicine, January 2024, Japanese Society for Hygiene

    Professor Akimasa Hirata

  36. Effect of the Conductivity Variations on Computed Electric Field Induced in Learning-Based Models

    Article • IEEE Access, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  37. Association of nuclear cataract prevalence with UV radiation and heat load in lens of older people -five city study-

    Article • Environmental Science and Pollution Research, November 2023, Springer Science + Business Media

    Professor Akimasa Hirata

  38. Tensor-conductance model for reducing the computational artifact in target tissue for low-frequency dosimetry

    Article • Physics in Medicine and Biology, October 2023, Institute of Physics Publishing

    Professor Akimasa Hirata

  39. FDTD Assessment of Exposures to Far-Field mmWave Beams in Anatomical Head Model

    Article • IEEE Transactions on Electromagnetic Compatibility, October 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  40. Population-Level Immunity for Transient Suppression of COVID-19 Waves in Japan from April 2021 to September 2022

    Article • Vaccines, September 2023, MDPI AG

    Professor Akimasa Hirata

  41. Computation of group-level electric field in lower limb motor area for different tDCS montages

    Article • Clinical Neurophysiology, June 2023, Elsevier

    Professor Akimasa Hirata

  42. Projection of COVID-19 Positive Cases Considering Hybrid Immunity: Case Study in Tokyo

    Article • Vaccines, March 2023, MDPI AG

    Professor Akimasa Hirata

  43. Whole-Body Exposure System Using Horn Antennas With Dielectric Lens at 28 GHz

    Article • IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology, March 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  44. Mapping Brain Motor Functions Using Transcranial Magnetic Stimulation with a Volume Conductor Model and Electrophysiological Experiments

    Article • Brain Sciences, January 2023, MDPI AG

    Professor Akimasa Hirata

  45. Calculated Epithelial/Absorbed Power Density for Exposure From Antennas at 10–90 GHz: Intercomparison Study Using a Planar Skin Model

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  46. Calculation of Electric Field Induced in the Human Body for Simultaneous Exposure to Spatially Uniform ELF Electric and Magnetic Fields With a Phase Difference

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  47. Computation of Whole-Body Average SAR in Realistic Human Models From 1 to 100 GHz

    Article • IEEE Transactions on Microwave Theory and Techniques, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  48. Intercomparison of the Averaged Induced Electric Field in Learning-Based Human Head Models Exposed to Low-Frequency Magnetic Fields

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  49. Wireless Power Transfer Systems with Composite Cores for Magnetic Field Shielding with Electric Vehicles

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  50. Effects of cerebellar transcranial direct current stimulation on upper limb motor function after stroke: study protocol for the pilot of a randomized controlled trial

    Article • Pilot and Feasibility Studies, December 2022, Springer Science + Business Media

    Professor Akimasa Hirata

  51. Computation of Absorbed Power Densities in High-Resolution Head Models by Considering Skin Thickness in Quasi-Millimeter and Millimeter Wave Bands

    Article • IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology, December 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  52. Induced Electric Field in Learning-Based Head Models With Smooth Conductivity for Exposure to Uniform Low-Frequency Magnetic Fields

    Article • IEEE Transactions on Electromagnetic Compatibility, December 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  53. The Effects of Time Window-Averaged Mobility on Effective Reproduction Number of COVID-19 Viral Variants in Urban Cities

    Article • Journal of Urban Health, November 2022, Springer Science + Business Media

    Professor Akimasa Hirata

  54. Assessment of incident power density in different shapes of averaging area for radio-frequency exposure above 6 GHz

    Article • Physics in Medicine and Biology, October 2022, Institute of Physics Publishing

    Professor Akimasa Hirata

  55. Estimation of mRNA COVID-19 Vaccination Effectiveness in Tokyo for Omicron Variants BA.2 and BA.5: Effect of Social Behavior

    Article • Vaccines, October 2022, MDPI AG

    Professor Akimasa Hirata

  56. An effective edge conductivity for reducing staircasing error in induced electric field computation for low-frequency magnetic field dosimetry

    Article • Physics in Medicine and Biology, October 2022, Institute of Physics Publishing

    Professor Akimasa Hirata

  57. COVID-19 forecasting using new viral variants and vaccination effectiveness models

    Article • Computers in Biology and Medicine, October 2022, Elsevier

    Professor Akimasa Hirata

  58. Did the Tokyo Olympic Games enhance the transmission of COVID-19? An interpretation with machine learning

    Article • Computers in Biology and Medicine, July 2022, Elsevier

    Professor Akimasa Hirata

  59. Planar Omnidirectional Wireless Power Transfer System Based on Novel Metasurface

    Article • IEEE Transactions on Electromagnetic Compatibility, April 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  60. Estimation of Real-World Vaccination Effectiveness of mRNA COVID-19 Vaccines against Delta and Omicron Variants in Japan

    Article • Vaccines, March 2022, MDPI AG

    Professor Akimasa Hirata

  61. Nonequivalent After-Effects of Alternating Current Stimulation on Motor Cortex Oscillation and Inhibition: Simulation and Experimental Study

    Article • Brain Sciences, January 2022, MDPI AG

    Professor Akimasa Hirata

  62. Computed and Measured Core Temperature of Patients With Heatstroke Transported From Their Homes via Ambulance

    Article • IEEE Access, January 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  63. Evaluation of Peripheral Electrostimulation Thresholds in Human Model for Uniform Magnetic Field Exposure

    Article • International Journal of Environmental Research and Public Health, December 2021, MDPI AG

    Professor Akimasa Hirata

  64. Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop

    Article • Energies, November 2021, MDPI AG

    Professor Akimasa Hirata

  65. A Novel Method to Predict the Maximum Electric Fields in Different Body Parts Exposed to Uniform Low-Frequency Magnetic Field

    Article • IEEE Transactions on Electromagnetic Compatibility, October 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  66. Assessment of Human Exposure to Electromagnetic Fields: Review and Future Directions

    Article • IEEE Transactions on Electromagnetic Compatibility, October 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  67. Editorial: Introduction to the Special Issue on Progress in Environmental Electromagnetic Safety and Biomedical EMC

    Article • IEEE Transactions on Electromagnetic Compatibility, October 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  68. Effect of Incidence Angle on the Spatial-Average of Incident Power Density Definition to Correlate Skin Temperature Rise for Millimeter Wave Exposures

    Article • IEEE Transactions on Electromagnetic Compatibility, October 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  69. Exposure Assessment of Array Antennas at 28 GHz Using Hybrid Spherical Near-Field Transformation and FDTD Method

    Article • IEEE Transactions on Electromagnetic Compatibility, October 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  70. Infectivity Upsurge by COVID-19 Viral Variants in Japan: Evidence from Deep Learning Modeling

    Article • International Journal of Environmental Research and Public Health, July 2021, MDPI AG

    Professor Akimasa Hirata

  71. ECG Localization Method Based on Volume Conductor Model and Kalman Filtering

    Article • Sensors, June 2021, MDPI AG

    Professor Akimasa Hirata

  72. One-Year Lesson: Machine Learning Prediction of COVID-19 Positive Cases with Meteorological Data and Mobility Estimate in Japan

    Article • International Journal of Environmental Research and Public Health, May 2021, MDPI AG

    Professor Akimasa Hirata

  73. Human exposure to radiofrequency energy above 6 GHz: review of computational dosimetry studies

    Article • Physics in Medicine and Biology, April 2021, Institute of Physics Publishing

    Professor Akimasa Hirata

  74. Influence of segmentation accuracy in structural MR head scans on electric field computation for TMS and tES

    Article • Physics in Medicine and Biology, March 2021, Institute of Physics Publishing

    Professor Akimasa Hirata

  75. Safety Standard Compliance of Human Exposure From Vehicle Cables Using Coupling Factors in the Frequency Range of 0.3–400 kHz

    Article • IEEE Transactions on Electromagnetic Compatibility, February 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  76. Assessment of mmWave Exposure From Antenna Based on Transformation of Spherical Wave Expansion to Plane Wave Expansion

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  77. Body Core Temperature Estimation Using New Compartment Model With Vital Data From Wearable Devices

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  78. Intercomparison of Calculated Incident Power Density and Temperature Rise for Exposure From Different Antennas at 10–90 GHz

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  79. Power Absorption and Skin Temperature Rise From Simultaneous Near-Field Exposure at 2 and 28 GHz

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  80. Review on biophysical modelling and simulation studies for transcranial magnetic stimulation

    Article • Physics in Medicine and Biology, December 2020, Institute of Physics Publishing

    Professor Akimasa Hirata

  81. Effect of a Lens Protein in Low-Temperature Culture of Novel Immortalized Human Lens Epithelial Cells (iHLEC-NY2)

    Article • Cells, December 2020, MDPI AG

    Professor Akimasa Hirata

  82. Effect of Skin-to-Skin Contact on Stimulation Threshold and Dosimetry

    Article • IEEE Transactions on Electromagnetic Compatibility, December 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  83. Assessment of absorbed power density and temperature rise for nonplanar body model under electromagnetic exposure above 6 GHz

    Article • Physics in Medicine and Biology, November 2020, Institute of Physics Publishing

    Professor Akimasa Hirata

  84. Correlation between COVID-19 Morbidity and Mortality Rates in Japan and Local Population Density, Temperature, and Absolute Humidity

    Article • International Journal of Environmental Research and Public Health, July 2020, MDPI AG

    Professor Akimasa Hirata

  85. Influence of Absolute Humidity, Temperature and Population Density on COVID-19 Spread and Decay Durations: Multi-Prefecture Study in Japan

    Article • International Journal of Environmental Research and Public Health, July 2020, MDPI AG

    Professor Akimasa Hirata

  86. Effect of Loudspeakers on the In Situ Electric Field in a Driver Body Model Exposed to an Electric Vehicle Wireless Power Transfer System

    Article • Energies, July 2020, MDPI AG

    Professor Akimasa Hirata

  87. Deep Learning-Based Development of Personalized Human Head Model With Non-Uniform Conductivity for Brain Stimulation

    Article • IEEE Transactions on Medical Imaging, July 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  88. Reduction of Human Interaction with Wireless Power Transfer System Using Shielded Loop Coil

    Article • Electronics, June 2020, MDPI AG

    Professor Akimasa Hirata

  89. TMS activation site estimation using multiscale realistic head models

    Article • Journal of Neural Engineering, June 2020, Institute of Physics Publishing

    Professor Akimasa Hirata

  90. Comments on the 2013 ICNIRP Laser Guidelines

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  91. End-to-end semantic segmentation of personalized deep brain structures for non-invasive brain stimulation

    Article • Neural Networks, May 2020, Elsevier

    Professor Akimasa Hirata

  92. Gaps in Knowledge Relevant to the “Guidelines for Limiting Exposure to Time-Varying Electric and Magnetic Fields (1 Hz–100 kHz)”

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  93. Guidelines for Limiting Exposure to Electromagnetic Fields (100 kHz to 300 GHz)

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  94. ICNIRP Note: Critical Evaluation of Two Radiofrequency Electromagnetic Field Animal Carcinogenicity Studies Published in 2018

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  95. Intended Human Exposure to Non-ionizing Radiation for Cosmetic Purposes

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  96. Light-Emitting Diodes (LEDS): Implications for Safety

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  97. Principles for Non-Ionizing Radiation Protection

    Article • Health Physics, May 2020, Wolters Kluwer Health

    Professor Akimasa Hirata

  98. Learning-based estimation of dielectric properties and tissue density in head models for personalized radio-frequency dosimetry

    Article • Physics in Medicine and Biology, March 2020, Institute of Physics Publishing

    Professor Akimasa Hirata

  99. Significant group-level hotspots found in deep brain regions during transcranial direct current stimulation (tDCS): A computational analysis of electric fields

    Article • Clinical Neurophysiology, March 2020, Elsevier

    Professor Akimasa Hirata

  100. Group-level analysis of induced electric field in deep brain regions by different TMS coils

    Article • Physics in Medicine and Biology, January 2020, Institute of Physics Publishing

    Professor Akimasa Hirata

  101. Cost of focality in TDCS: Interindividual variability in electric fields

    Article • Brain Stimulation, January 2020, Elsevier

    Professor Akimasa Hirata

  102. Correlation Between Estimated Thermoregulatory Responses and Pacing in Athletes During Marathon

    Article • IEEE Access, January 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  103. Evaluation of SAR and Temperature Rise in Human Hand Due to Contact Current From 100 kHz to 100 MHz

    Article • IEEE Access, January 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  104. Large-Scale Analysis of the Head Proximity Effects on Antenna Performance Using Machine Learning Based Models

    Article • IEEE Access, January 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  105. Skin Temperature Elevation for Incident Power Densities From Dipole Arrays at 28 Ghz

    Article • IEEE Access, January 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  106. Transient Thermal Responses of Skin to Pulsed Millimeter Waves

    Article • IEEE Access, January 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  107. Estimation of Time-Course Core Temperature and Water Loss in Realistic Adult and Child Models with Urban Micrometeorology Prediction

    Article • International Journal of Environmental Research and Public Health, December 2019, MDPI AG

    Professor Akimasa Hirata

  108. Electromagnetic Dosimetry and Compliance for Wireless Power Transfer Systems in Vehicles

    Article • IEEE Transactions on Electromagnetic Compatibility, December 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  109. Development of accurate human head models for personalized electromagnetic dosimetry using deep learning

    Article • NeuroImage, November 2019, Elsevier

    Professor Akimasa Hirata

  110. Real-time estimation of electric fields induced by transcranial magnetic stimulation with deep neural networks

    Article • Brain Stimulation, November 2019, Elsevier

    Professor Akimasa Hirata

  111. Estimation of heat-related morbidity from weather data: A computational study in three prefectures of Japan over 2013–2018

    Article • Environment International, September 2019, Elsevier

    Professor Akimasa Hirata

  112. Different thermoregulatory responses of people from tropical and temperate zones: A computational study

    Article • Building and Environment, July 2019, Elsevier

    Professor Akimasa Hirata

  113. Group-level and functional-region analysis of electric-field shape during cerebellar transcranial direct current stimulation with different electrode montages

    Article • Journal of Neural Engineering, March 2019, Institute of Physics Publishing

    Professor Akimasa Hirata

  114. Can electric fields explain inter-individual variability in transcranial direct current stimulation of the motor cortex?

    Article • Scientific Reports, January 2019, Springer Science + Business Media

    Professor Akimasa Hirata

  115. Corticomotoneuronal Model for Intraoperative Neurophysiological Monitoring During Direct Brain Stimulation

    Article • International Journal of Neural Systems, January 2019, World Scientific Pub Co Pte Lt

    Professor Akimasa Hirata

  116. Forward Electrocardiogram Modeling by Small Dipoles Based on Whole-Body Electric Field Analysis

    Article • IEEE Access, January 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  117. Human Head Skin Thickness Modeling for Electromagnetic Dosimetry

    Article • IEEE Access, January 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  118. Spatial Averaging Schemes of In Situ Electric Field for Low-Frequency Magnetic Field Exposures

    Article • IEEE Access, January 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  119. Setting exposure guidelines and product safety standards for radio-frequency exposure at frequencies above 6 GHz: brief review

    Article • Annals of Telecommunications, November 2018, Springer Science + Business Media

    Professor Akimasa Hirata

  120. Intraoperative direct subcortical stimulation: comparison of monopolar and bipolar stimulation

    Article • Physics in Medicine and Biology, November 2018, Institute of Physics Publishing

    Professor Akimasa Hirata

  121. A multi-scale computational approach based on TMS experiments for the assessment of electro-stimulation thresholds of the brain at intermediate frequencies

    Article • Physics in Medicine and Biology, November 2018, Institute of Physics Publishing

    Professor Akimasa Hirata

  122. Comparison of Thermal Response for RF Exposure in Human and Rat Models

    Article • International Journal of Environmental Research and Public Health, October 2018, MDPI AG

    Professor Akimasa Hirata

  123. Atlas of optimal coil orientation and position for TMS: A computational study

    Article • Brain Stimulation, July 2018, Elsevier

    Professor Akimasa Hirata

  124. Computational Artifacts of the In Situ Electric Field in Anatomical Models Exposed to Low-Frequency Magnetic Field

    Article • IEEE Transactions on Electromagnetic Compatibility, June 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  125. On the Use of Conformal Models and Methods in Dosimetry for Nonuniform Field Exposure

    Article • IEEE Transactions on Electromagnetic Compatibility, April 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  126. Temperature elevation in the human brain and skin with thermoregulation during exposure to RF energy

    Article • BioMedical Engineering OnLine, January 2018, Springer Science + Business Media

    Professor Akimasa Hirata

  127. Where and what TMS activates: Experiments and modeling

    Article • Brain Stimulation, January 2018, Elsevier

    Professor Akimasa Hirata

  128. Area-Averaged Transmitted Power Density at Skin Surface as Metric to Estimate Surface Temperature Elevation

    Article • IEEE Access, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  129. Intercomparison of In Situ Electric Fields in Human Models Exposed to Spatially Uniform Magnetic Fields

    Article • IEEE Access, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  130. Relationship of External Field Strength With Local and Whole-Body Averaged Specific Absorption Rates in Anatomical Human Models

    Article • IEEE Access, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  131. Risk Management of Heatstroke Based on Fast Computation of Temperature and Water Loss Using Weather Data for Exposure to Ambient Heat and Solar Radiation

    Article • IEEE Access, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  132. Temperature Rise for Brief Radio-Frequency Exposure Below 6 GHz

    Article • IEEE Access, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  133. Thermal Analysis of Averaging Times in Radio-Frequency Exposure Limits Above 1 GHz

    Article • IEEE Access, January 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  134. Human exposure to pulsed fields in the frequency range from 6 to 100 GHz

    Article • Physics in Medicine and Biology, August 2017, Institute of Physics Publishing

    Professor Akimasa Hirata

  135. Computational Dosimetry of the Human Head Exposed to Near-Field Microwaves Using Measured Blood Flow

    Article • IEEE Transactions on Electromagnetic Compatibility, April 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  136. Derivation of Coupling Factors for Different Wireless Power Transfer Systems: Inter- and Intralaboratory Comparison

    Article • IEEE Transactions on Electromagnetic Compatibility, April 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  137. Multiphysics and Thermal Response Models to Improve Accuracy of Local Temperature Estimation in Rat Cortex under Microwave Exposure

    Article • International Journal of Environmental Research and Public Health, March 2017, MDPI AG

    Professor Akimasa Hirata

  138. On the averaging area for incident power density for human exposure limits at frequencies over 6 GHz

    Article • Physics in Medicine and Biology, March 2017, Institute of Physics Publishing

    Professor Akimasa Hirata

  139. Effect of microscopic modeling of skin in electrical and thermal analysis of transcranial direct current stimulation

    Article • Physics in Medicine and Biology, November 2016, Institute of Physics Publishing

    Professor Akimasa Hirata

  140. Electric fields of motor and frontal tDCS in a standard brain space: A computer simulation study

    Article • NeuroImage, August 2016, Elsevier

    Professor Akimasa Hirata

  141. Evaluation method for in-situ electric field of different TMS coils in human brain

    Article • August 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  142. Relationship between peak spatial-averaged specific absorption rate and peak temperature elevation in human head in frequency range of 1–30 GHz

    Article • Physics in Medicine and Biology, July 2016, Institute of Physics Publishing

    Professor Akimasa Hirata

  143. Low-frequency electrical dosimetry: research agenda of the IEEE International Committee on Electromagnetic Safety

    Article • Physics in Medicine and Biology, May 2016, Institute of Physics Publishing

    Professor Akimasa Hirata

  144. Special section: Recent progress in low-frequency dosimetry modeling: from induction to electrostimulation

    Article • Physics in Medicine and Biology, May 2016, Institute of Physics Publishing

    Professor Akimasa Hirata

  145. Why intra-epidermal electrical stimulation achieves stimulation of small fibres selectively: a simulation study

    Article • Physics in Medicine and Biology, May 2016, Institute of Physics Publishing

    Professor Akimasa Hirata

  146. The electromagnetic-thermal dosimetry for the homogeneous human brain model

    Article • Engineering Analysis with Boundary Elements, February 2016, Elsevier

    Professor Akimasa Hirata

  147. Wireless Power Transfer Charging System for AIMDs and Pacemakers

    Article • IEEE Transactions on Microwave Theory and Techniques, February 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  148. Internal electric field in pregnant-woman model for wireless power transfer systems in electric vehicles

    Article • Electronics Letters, December 2015, the Institution of Engineering and Technology (the IET)

    Professor Akimasa Hirata

  149. Evaluation of nonuniform field exposures with coupling factors

    Article • Physics in Medicine and Biology, October 2015, Institute of Physics Publishing

    Professor Akimasa Hirata

  150. Inter-subject Variability in Electric Fields of Motor Cortical tDCS

    Article • Brain Stimulation, September 2015, Elsevier

    Dr Valerio De Santis , Professor Akimasa Hirata

  151. An equivalent skin conductivity model for low-frequency magnetic field dosimetry

    Article • Biomedical Physics & Engineering Express, June 2015, Institute of Physics Publishing

    Dr Valerio De Santis , Professor Akimasa Hirata

  152. Computational estimation of body temperature and sweating in the aged during passive heat exposure

    Article • International Journal of Thermal Sciences, March 2015, Elsevier

    Professor Akimasa Hirata

  153. Characteristics of ocular temperature elevations after exposure to quasi- and millimeter waves (18-40 GHz)

    Article • Journal of Infrared Millimeter and Terahertz Waves, January 2015, Springer Science + Business Media

    Professor Akimasa Hirata

  154. Quasistatic Approximation for Exposure Assessment of Wireless Power Transfer

    Article • IEICE Transactions on Communications, January 2015, Institute of Electronics, Information and Communications Engineers (IEICE)

    Professor Akimasa Hirata

  155. Magnetic Field Measurement for Human Exposure Assessment near Wireless Power Transfer Systems in Kilohertz and Megahertz Bands

    Article • IEICE Transactions on Communications, January 2015, Institute of Electronics, Information and Communications Engineers (IEICE)

    Professor Akimasa Hirata

  156. In-situelectric field in human body model in different postures for wireless power transfer system in an electrical vehicle

    Article • Physics in Medicine and Biology, December 2014, Institute of Physics Publishing

    Professor Akimasa Hirata

  157. Computational dosimetry for child and adult human models due to contact current from 10 Hz to 110 MHz

    Article • Radiation Protection Dosimetry, October 2014, Oxford University Press (OUP)

    Professor Akimasa Hirata

  158. Multi-scale simulations predict responses to non-invasive nerve root stimulation

    Article • Journal of Neural Engineering, August 2014, Institute of Physics Publishing

    Professor Akimasa Hirata

  159. Magnetic field measurement near wireless power transfer systems

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  160. Effect of relative humidity during 40 GHz millimeter wave exposure

    Article • August 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  161. Dosimetry Using a Localized Exposure System in the Millimeter-Wave Band for in vivo Studies on Ocular Effects

    Article • IEEE Transactions on Microwave Theory and Techniques, July 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  162. Corrigendum: Computational dosimetry for grounded and ungrounded human models due to contact current (2013 Phys. Med. Biol. 58 5153–72)

    Article • Physics in Medicine and Biology, June 2014, Institute of Physics Publishing

    Professor Akimasa Hirata

  163. Analysis ofin situelectric field and specific absorption rate in human models for wireless power transfer system with induction coupling

    Article • Physics in Medicine and Biology, June 2014, Institute of Physics Publishing

    Professor Akimasa Hirata

  164. Wireless power transfer system applied to an active implantable medical device

    Article • May 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  165. Computation of Temperature Elevation in a Fetus Exposed to Ambient Heat and Radio Frequency Fields

    Article • Numerical Heat Transfer Part A Applications, March 2014, Taylor & Francis

    Professor Akimasa Hirata

  166. Effects of coil orientation on the electric field induced by TMS over the hand motor area

    Article • Physics in Medicine and Biology, December 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  167. On the issues related to compliance of LF pulsed exposures with safety standards and guidelines

    Article • Physics in Medicine and Biology, November 2013, Institute of Physics Publishing

    Dr Valerio De Santis , Professor Akimasa Hirata

  168. Computation of induced electric field for the sacral nerve activation

    Article • Physics in Medicine and Biology, October 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  169. FDTD computation of temperature elevation in the elderly for far-field RF exposures

    Article • Radiation Protection Dosimetry, October 2013, Oxford University Press (OUP)

    Professor Akimasa Hirata

  170. Evaluation of the induced electric field and compliance procedure for a wireless power transfer system in an electrical vehicle

    Article • Physics in Medicine and Biology, October 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  171. FDTD Analysis of Emission from Capacitor with Mechanical Motion

    Article • Microwave and Optical Technology Letters, September 2013, Wiley

    Professor Akimasa Hirata

  172. Confirmation of quasi-static approximation in SAR evaluation for a wireless power transfer system

    Article • Physics in Medicine and Biology, August 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  173. Computational dosimetry for grounded and ungrounded human models due to contact current

    Article • Physics in Medicine and Biology, July 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  174. Computational analysis shows why transcranial alternating current stimulation induces retinal phosphenes

    Article • Journal of Neural Engineering, July 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  175. Computation of temperature elevation in fetus due to radio-frequency exposure with a new thermal modeling

    Article • July 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  176. FDTD analysis of temperature elevation in the lens of human and rabbit models due to near-field and far-field exposures at 2.45 GHz

    Article • Radiation Protection Dosimetry, February 2013, Oxford University Press (OUP)

    Professor Akimasa Hirata

  177. The relationship between specific absorption rate and temperature elevation in anatomically based human body models for plane wave exposure from 30 MHz to 6 GHz

    Article • Physics in Medicine and Biology, January 2013, Institute of Physics Publishing

    Professor Akimasa Hirata

  178. Effects of Phase Difference in Dipole Phased-Array Antenna Above EBG Substrates on SAR

    Article • IEEE Antennas and Wireless Propagation Letters, January 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  179. Analysis of Temperature Elevation in the Human Body Models for Simultaneous Exposure of Heat and Solar Radiation

    Article • IEEJ Transactions on Fundamentals and Materials, January 2013, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  180. Estimation of Whole-Body Average SARs in Human Models for 0.1-2 GHz Vertically Polarized Far-Field Exposure Using Squares Averaged Over Height of Layer Induced Currents

    Article • IEEJ Transactions on Electronics Information and Systems, January 2013, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  181. Popularization Enlightenment and Post Facto Assessment Based on Computational Simulation of Induced Current in Human Body

    Article • IEEJ Transactions on Fundamentals and Materials, January 2013, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  182. Estimation of the whole-body averaged SAR of grounded human models for plane wave exposure at respective resonance frequencies

    Article • Physics in Medicine and Biology, November 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  183. Fast multigrid-based computation of the induced electric field for transcranial magnetic stimulation

    Article • Physics in Medicine and Biology, November 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  184. Computational analysis of thresholds for magnetophosphenes

    Article • Physics in Medicine and Biology, September 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  185. FDTD analysis of induced electric field in pheripheral nerve of human body models due to contact current

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  186. FDTD analysis of temperature elevation in the human and rabbit phantoms due to plane-wave exposure at 2.45GHz

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  187. Improving the computational speed and reducing the staircasing error for simulations of human exposure to low frequency magnetic fields

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  188. Investigation of acute ocular damage threshold of 40 GHz millimeter wave on rabbit

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  189. Investigation of ocular temperature change in rabbits during 40 GHz band exposure

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  190. SAR and radiation characteristics of dipole antenna above finite EBG substrate in presence of cubic head model

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  191. Computational estimation of decline in sweating in the elderly from measured body temperatures and sweating for passive heat exposure

    Article • Physiological Measurement, July 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  192. Corrigendum: Reducing the staircasing error in computational dosimetry of low-frequency electromagnetic fields

    Article • Physics in Medicine and Biology, July 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  193. Evaluation of SAR in a human body model due to wireless power transmission in the 10 MHz band

    Article • Physics in Medicine and Biology, July 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  194. Dispersive FDTD analysis of induced electric field in human models due to electrostatic discharge

    Article • Physics in Medicine and Biology, June 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  195. Modelling the SAR and thermoregulatory response during far-field RF exposure

    Article • May 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  196. Reducing the staircasing error in computational dosimetry of low-frequency electromagnetic fields

    Article • Physics in Medicine and Biology, January 2012, Institute of Physics Publishing

    Professor Akimasa Hirata

  197. SAR AND RADIATION CHARACTERISTICS OF A DIPOLE ANTENNA ABOVE DIFFERENTFINITE EBG SUBSTRATESIN THE PRESENCE OF A REALISTICHEAD MODEL IN THE 3.5 GHZ BAND

    Article • Progress In Electromagnetics Research B, January 2012, EMW Publishing

    Professor Akimasa Hirata

  198. 電波の生体作用と無線通信機器に対する適合性評価

    Article • IEICE Communications Society Magazine, January 2012, Institute of Electronics, Information and Communications Engineers (IEICE)

    Professor Akimasa Hirata

  199. Discussion on Activities of Enlightenment for High School Students Based on Survey

    Article • IEEJ Transactions on Fundamentals and Materials, January 2012, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata, Masashi Kato

  200. Computational modeling of temperature elevation and thermoregulatory response in the brains of anesthetized rats locally exposed at 1.5 GHz

    Article • Physics in Medicine and Biology, November 2011, Institute of Physics Publishing

    Professor Akimasa Hirata

  201. Dominant factors affecting temperature rise in simulations of human thermoregulation during RF exposure

    Article • Physics in Medicine and Biology, November 2011, Institute of Physics Publishing

    Professor Akimasa Hirata

  202. Investigation of acute ocular injury threshold by 76 GHz band exposure in rabbits

    Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  203. Variability of temperature elevation in anatomically-based human body models exposed to microwaves

    Article • August 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  204. An electric field induced in the retina and brain at threshold magnetic flux density causing magnetophosphenes

    Article • Physics in Medicine and Biology, June 2011, Institute of Physics Publishing

    Professor Akimasa Hirata

  205. DOMINANT FACTORS AFFECTING TEMPERATURE ELEVATION IN ADULT AND CHILD MODELS EXPOSED TO SOLAR RADIATION IN HOT ENVIRONMENT

    Article • Progress In Electromagnetics Research B, January 2011, EMW Publishing

    Professor Akimasa Hirata

  206. EFFECTIVE RESISTANCE OF GROUNDED HUMANS FOR WHOLE-BODY AVERAGED SAR ESTIMATION AT RESONANCE FREQUENCIES

    Article • Progress In Electromagnetics Research B, January 2011, EMW Publishing

    Professor Akimasa Hirata

  207. Dipole Antenna Above EBG Substrate for Local SAR Reduction

    Article • IEEE Antennas and Wireless Propagation Letters, January 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  208. Investigation of Time Series Change and Difference between Universities in Motivation for University Entrance of Students Studying Electrical and Electronic Engineering

    Article • IEEJ Transactions on Fundamentals and Materials, January 2011, Institute of Electrical Engineers of Japan (IEE Japan)

    Masashi Kato, Professor Akimasa Hirata

  209. A numerical analysis of temperature elevation in a rabbit ocular with localized and uniformed exposure conditions at 60 GHz

    Article • January 2011, ACM (Association for Computing Machinery)

    Professor Akimasa Hirata

  210. Electromagnetic and Thermal Dosimetric Techniques in Humans and its Application

    Article • IEEJ Transactions on Fundamentals and Materials, January 2011, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  211. In-vivo Measurement of Complex Relative Permittivity for Human Skin Tissues Using Open-Ended Coaxial Probe

    Article • IEEJ Transactions on Electronics Information and Systems, January 2011, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  212. Local exposure of the rat cortex to radiofrequency electromagnetic fields increases local cerebral blood flow along with temperature

    Article • Journal of Applied Physiology, January 2011, American Physiological Society

    Professor Akimasa Hirata

  213. Uncertainty of GHz-band Whole-body Average SARs in Infants based on their Kaup Indices

    Article • IEEJ Transactions on Fundamentals and Materials, January 2011, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  214. Correlation between peak spatial-average SAR and maximum temperature elevation in layered cubical model in the frequency range above 3 GHz

    Article • August 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  215. Parameter variation effects on temperature elevation in a steady-state, one-dimensional thermal model for millimeter wave exposure of one- and three-layer human tissue

    Article • Physics in Medicine and Biology, July 2010, Institute of Physics Publishing

    Professor Akimasa Hirata

  216. Computation of induced electric field and temperature elevation in human due to lightning current

    Article • Applied Physics Letters, May 2010, American Institute of Physics

    Professor Akimasa Hirata

  217. Acute Dosimetry and Estimation of Threshold-Inducing Behavioral Signs of Thermal Stress in Rabbits at 2.45-GHz Microwave Exposure

    Article • IEEE Transactions on Biomedical Engineering, May 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  218. Effect of the averaging volume and algorithm on the in situ electric field for uniform electric- and magnetic-field exposures

    Article • Physics in Medicine and Biology, April 2010, Institute of Physics Publishing

    Professor Akimasa Hirata

  219. In situ electric fields causing electro-stimulation from conductor contact of charged human

    Article • Radiation Protection Dosimetry, April 2010, Oxford University Press (OUP)

    Professor Akimasa Hirata

  220. Estimation of Whole-Body Average SAR in Human Models Due to Plane-Wave Exposure at Resonance Frequency

    Article • IEEE Transactions on Electromagnetic Compatibility, February 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  221. Temperature elevation in Japanese head models for local SAR with different averaging Mass

    Article • January 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  222. Modeling of ESD-Induced Ultrawideband Noise Propagating on the Human Body

    Article • IEEE Antennas and Wireless Propagation Letters, January 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  223. Evaluation of SAR and Temperature Elevation Using Japanese Anatomical Human Models for Body-Worn Devices

    Article • IEICE Transactions on Communications, January 2010, Institute of Electronics, Information and Communications Engineers (IEICE)

    Professor Akimasa Hirata

  224. Quasi-Static FDTD Method for Dosimetry in Human due to Contact Current

    Article • IEICE Transactions on Electronics, January 2010, Institute of Electronics, Information and Communications Engineers (IEICE)

    Professor Akimasa Hirata

  225. 人体組織に対する電気定数のin-vivo時間領域測定

    Article • IEEJ Transactions on Fundamentals and Materials, January 2010, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  226. Introduction of Objective GPAs and its Application to Careful Guidance for Students

    Article • IEEJ Transactions on Fundamentals and Materials, January 2010, Institute of Electrical Engineers of Japan (IEE Japan)

    Masashi Kato, Professor Akimasa Hirata

  227. Basic Restriction and Reference Level in Anatomically-based Japanese Models for Low-Frequency Electric and Magnetic Field Exposures

    Article • IEEJ Transactions on Fundamentals and Materials, January 2010, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  228. Uncertainty in Grade Evaluation Caused by Different Factors

    Article • IEEJ Transactions on Fundamentals and Materials, January 2010, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  229. SAR averaging mass to correlate with temperature elevation due to dipole antenna from 1 to 6 GHz

    Article • December 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  230. Intercomparison of induced fields in Japanese male model for ELF magnetic field exposures: effect of different computational methods and codes

    Article • Radiation Protection Dosimetry, November 2009, Oxford University Press (OUP)

    Professor Akimasa Hirata

  231. The correlation between mass-averaged SAR and temperature elevation in the human head model exposed to RF near-fields from 1 to 6 GHz

    Article • Physics in Medicine and Biology, November 2009, Institute of Physics Publishing

    Professor Akimasa Hirata

  232. ACUTE OCULAR INJURIES CAUSED BY 60-GHZ MILLIMETER-WAVE EXPOSURE

    Article • Health Physics, September 2009, Wolters Kluwer Health

    Professor Akimasa Hirata

  233. In-situ electric field and current density in Japanese male and female models for uniform magnetic field exposures

    Article • Radiation Protection Dosimetry, July 2009, Oxford University Press (OUP)

    Professor Akimasa Hirata

  234. Modeling time variation of blood temperature in a bioheat equation and its application to temperature analysis due to RF exposure

    Article • Physics in Medicine and Biology, May 2009, Institute of Physics Publishing

    Professor Akimasa Hirata

  235. Influence of electromagnetic polarization on the whole-body averaged SAR in children for plane-wave exposures

    Article • Physics in Medicine and Biology, January 2009, Institute of Physics Publishing

    Professor Akimasa Hirata

  236. ESTIMATION OF CORE TEMPERATURE ELEVATION IN HUMANS AND ANIMALS FOR WHOLE-BODY AVERAGED SAR

    Article • Progress In Electromagnetics Research, January 2009, EMW Publishing

    Professor Akimasa Hirata

  237. Effects of dielectric permittivities on skin heating due to millimeter wave exposure

    Article • BioMedical Engineering OnLine, January 2009, Springer Science + Business Media

    Professor Akimasa Hirata

  238. Computational Techniques of Electromagnetic Dosimetry for Humans

    Article • IEEJ Transactions on Fundamentals and Materials, January 2009, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  239. Computational Electromagnetic Dosimetry of a Human Body in a Vehicle for Plane-wave Exposure

    Article • IEEJ Transactions on Fundamentals and Materials, January 2009, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  240. Conservative Estimation of Whole-body Average SAR in Infant Model for 0.3-6GHz Far-Field Exposure

    Article • IEEJ Transactions on Electronics Information and Systems, January 2009, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  241. Double-Sided Printed Bow-Tie Antenna with Notch Filter for UWB Applications

    Article • Journal of Electromagnetic Waves and Applications, January 2009, Taylor & Francis

    Professor Akimasa Hirata

  242. Effect of Electromagnetic Polarization on Whole-Body Average SAR in Infant Model for Far-Field Exposures

    Article • January 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  243. FDTD Calculation of FM-Band Crosstalks between Perpendicular Traces on Printed Circuit Board with Ground-Pattern Slits

    Article • IEEJ Transactions on Electronics Information and Systems, January 2009, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  244. Topics in EMC Issues Related to Safety and Secure Social Life

    Article • IEEJ Transactions on Fundamentals and Materials, January 2009, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  245. Theoretical Analysis for Temperature Elevation of Human Body Due to Millimeter Wave Exposure

    Article • December 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  246. Variability of whole-body average SAR in human models for far-field exposures

    Article • December 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  247. Conservative estimation of whole-body-averaged SARs in infants with a homogeneous and simple-shaped phantom in the GHz region

    Article • Physics in Medicine and Biology, November 2008, Institute of Physics Publishing

    Professor Akimasa Hirata

  248. Intercomparison of whole-body averaged SAR in European and Japanese voxel phantoms

    Article • Physics in Medicine and Biology, September 2008, Institute of Physics Publishing

    Professor Akimasa Hirata

  249. FDTD analysis of body-core temperature elevation in children and adults for whole-body exposure

    Article • Physics in Medicine and Biology, August 2008, Institute of Physics Publishing

    Professor Akimasa Hirata

  250. Computational model for calculating body-core temperature elevation in rabbits due to whole-body exposure at 2.45 GHz

    Article • Physics in Medicine and Biology, June 2008, Institute of Physics Publishing

    Professor Akimasa Hirata

  251. Effect of SAR average mass on correlation with temperature elevation in Japanese head model

    Article • May 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  252. COMPUTATION OF TEMPERATURE ELEVATION IN RABBIT EYE IRRADIATED BY 2.45-GHZ MICROWAVES WITH DIFFERENT FIELD CONFIGURATIONS

    Article • Health Physics, February 2008, Wolters Kluwer Health

    Professor Akimasa Hirata

  253. ON AVERAGING MASS OF SAR CORRELATING WITH TEMPERATURE ELEVATION DUE TO A DIPOLE ANTENNA

    Article • Progress In Electromagnetics Research, January 2008, EMW Publishing

    Professor Akimasa Hirata

  254. Analysis of Electromagnetic Environment in a CAD-Based Vehicle With a Human Body for Far-Field Incidence

    Article • IEEE Antennas and Wireless Propagation Letters, January 2008, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  255. Temperature elevation in the eye of anatomically based human head models for plane-wave exposures

    Article • Physics in Medicine and Biology, October 2007, Institute of Physics Publishing

    Professor Akimasa Hirata

  256. FDTD Computation of Temperature Elevation in Human Body for RF Far-Field Exposure

    Article • August 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  257. FDTD analysis of human body-core temperature elevation due to RF far-field energy prescribed in the ICNIRP guidelines

    Article • Physics in Medicine and Biology, August 2007, Institute of Physics Publishing

    Professor Akimasa Hirata

  258. Dosimetry in Japanese male and female models for a low-frequency electric field

    Article • Physics in Medicine and Biology, July 2007, Institute of Physics Publishing

    Professor Akimasa Hirata

  259. Correlation Between Absorption Cross Section and Body Surface Area of Human for Far-Field Exposure at GHz Bands

    Article • July 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  260. Relationship Between Temperature Elevation and Spatial Average SAR in Japanese Human Head Model Due to Dipole Antenna

    Article • July 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  261. Improved Heat Transfer Modeling of the Eye for Electromagnetic Wave Exposures

    Article • IEEE Transactions on Biomedical Engineering, May 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  262. Dominant factors influencing whole-body average SAR due to far-field exposure in whole-body resonance frequency and GHz regions

    Article • Bioelectromagnetics, January 2007, Wiley

    Professor Akimasa Hirata

  263. Correlation Between Peak Spatial-Average SAR and Temperature Increase Due to Antennas Attached to Human Trunk

    Article • IEEE Transactions on Biomedical Engineering, August 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  264. Correlation Between Maximum Temperature Increase and Peak SAR with Different Average Schemes and Masses

    Article • IEEE Transactions on Electromagnetic Compatibility, August 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  265. Enhancement of frequency-tunability for a Smith-Purcell free-electron laser oscillator in the millimeter-wave region

    Article • IEEE Transactions on Plasma Science, June 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  266. FDTD-Derived Correlation of Maximum Temperature Increase and Peak SAR in Child and Adult Head Models Due to Dipole Antenna

    Article • IEEE Transactions on Electromagnetic Compatibility, February 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  267. Propagation Characteristic of Wideband Electromagnetic Wave in the Ionosphere

    Article • IEEJ Transactions on Fundamentals and Materials, January 2006, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  268. Discussion on classification of impulsive EM noises emitted from power apparatus

    Article • Electrical Engineering in Japan, January 2006, Wiley

    Professor Akimasa Hirata

  269. Computational verification of anesthesia effect on temperature variations in rabbit eyes exposed to 2.45 GHz microwave energy

    Article • Bioelectromagnetics, January 2006, Wiley

    Professor Akimasa Hirata

  270. Accuracy Compensation in Direction Finding Using Patch Antenna Array With EBG Structure

    Article • IEEE Antennas and Wireless Propagation Letters, January 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  271. Time-Domain Mathematical Model of Impulsive Em Noises Emitted from Discharges

    Article • Journal of Electromagnetic Waves and Applications, January 2006, Taylor & Francis

    Professor Akimasa Hirata

  272. Toward Automatic Classification of Partial Discharge Sources With Neural Networks

    Article • IEEE Transactions on Power Delivery, January 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  273. Temperature Increase in Human Eyes Due to Near-Field and Far-Field Exposures at 900 MHz, 1.5 GHz, and 1.9 GHz

    Article • IEEE Transactions on Electromagnetic Compatibility, February 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  274. DOA Estimation of EM Pulses Emitted from Lightning Discharges

    Article • IEEJ Transactions on Fundamentals and Materials, January 2005, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  275. A Study on Human Body Modeling for the Mobile Terminal Antenna Design at 400 MHZ Band

    Article • Journal of Electromagnetic Waves and Applications, January 2005, Taylor & Francis

    Professor Akimasa Hirata

  276. Enhancement of frequency-tunability for a Smith-Purcell free-electron laser in the millimeter-wave region

    Article • January 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  277. Human Head Modeling for Handset Antenna Design at 5 GHz Band

    Article • Journal of Electromagnetic Waves and Applications, January 2005, Taylor & Francis

    Professor Akimasa Hirata

  278. Double-sided printed bow-tie antenna for UWB communications

    Article • IEEE Antennas and Wireless Propagation Letters, December 2004, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  279. A Compact and Wide-Band Metallic Reflector Grating in a Rectangular Waveguide

    Article • IEEE Transactions on Plasma Science, June 2004, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  280. An Operational VHF Broadband Digital Interferometer for Lightning Monitoring

    Article • IEEJ Transactions on Fundamentals and Materials, January 2004, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  281. Folded-loop antenna with a reflector for mobile handsets at 2.0 GHz

    Article • Microwave and Optical Technology Letters, January 2004, Wiley

    Professor Akimasa Hirata

  282. Feasibility study of adaptive nulling on handset for 4G mobile communications

    Article • IEEE Antennas and Wireless Propagation Letters, January 2004, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  283. Analysis of a metallic reflector grating with the influence of the joule loss taken into account

    Article • IEEE Transactions on Plasma Science, October 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  284. Correlation of maximum temperature increase and peak sar in the human head due to handset antennas

    Article • IEEE Transactions on Microwave Theory and Techniques, July 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  285. Operation strategy of residential centralized photovoltaic system in remote areas

    Article • Renewable Energy, June 2003, Elsevier

    Professor Akimasa Hirata

  286. Analysis of free-electron lasers via FDTD method

    Article • Electronics and Communications in Japan (Part II Electronics), May 2003, Wiley

    Professor Akimasa Hirata

  287. Direction-of-arrival estimation for ultra-wideband EM pulses with an interferometry

    Article • Microwave and Optical Technology Letters, February 2003, Wiley

    Professor Akimasa Hirata

  288. Folded-loop antennas for handset terminals at the 2.0-GHz band

    Article • Microwave and Optical Technology Letters, February 2003, Wiley

    Professor Akimasa Hirata

  289. Temperature increase in the human head due to a dipole antenna at microwave frequencies

    Article • IEEE Transactions on Electromagnetic Compatibility, February 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  290. ???????????????????????????????

    Article • IEEJ Transactions on Fundamentals and Materials, January 2003, Institute of Electrical Engineers of Japan (IEE Japan)

    Professor Akimasa Hirata

  291. DOA estimation of ultra-wideband EM waves with MUSIC and interferometry

    Article • IEEE Antennas and Wireless Propagation Letters, January 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  292. SAR and temperature increase in the human eye induced by obliquely incident plane waves

    Article • IEEE Transactions on Electromagnetic Compatibility, November 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  293. Design of a compact and wide-band metallic reflector grating for single-mode operation

    Article • IEEE Transactions on Plasma Science, October 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  294. Full-wave analysis of the field distribution of natural modes in the rectangular waveguide grating based on singular integral equation method

    Article • IEEE Transactions on Plasma Science, June 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  295. Effectiveness and limitation of the periodic boundary approximation in the analysis of single-pass electron beam devices

    Article • IEEE Transactions on Plasma Science, June 2002, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  296. Nonlinear characteristics of a cylindrical Cherenkov laser at millimeter wavelengths

    Article • Journal of Applied Physics, January 2002, American Institute of Physics

    Professor Akimasa Hirata

  297. Dosimetry in models of child and adult for low-frequency electric field

    Article • IEEE Transactions on Biomedical Engineering, January 2001, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  298. Full-wave modal analysis of the rectangular waveguide grating

    Article • IEEE Transactions on Plasma Science, June 2000, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  299. Temperature rises in the human eye exposed to EM waves in the frequency range 0.6-6 GHz

    Article • IEEE Transactions on Electromagnetic Compatibility, January 2000, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  300. Three-dimensional analysis of a Cherenkov laser via particle simulation

    Article • IEEE Journal of Quantum Electronics, January 1998, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  301. Nonlinear characteristics of a Smith-Purcell free-electron laser

    Article • Electronics and Communications in Japan (Part II Electronics), August 1997, Wiley

    Professor Akimasa Hirata

  302. Maximum temperature increases in the head and brain for SAR averaging schemes prescribed in safety guidelines

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  303. Wideband characteristics of impulsive em noise emitted from discharges and development of mathematical noise model

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata

  304. Evaluation of induced SAR in the human body due to EM waves emitted from a dipole antenna at 400 MHz band

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Professor Akimasa Hirata