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Accident Biomechanics Expert Witnesses

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Dr. J. Rasty, PE, MBA
President & CEO
1500 Broadway, Ste. 503
Lubbock TX 79401
USA
phone: Cell:806-773-7787 or Ofc: 806-368-9811
fax: 214-614-4955
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Since 1988, Real-World Forensic Engineering, LLC ("RWFE") has provided engineering services to industries and government labs, as well as litigation support to both plaintiff and defense attorneys practicing in many areas.

RWFE Expertise Includes:

Components & Machinery
Metallurgy & Corrosion
Dynamics of Impact & Collisions
Friction Analysis / Slips, Trips and Falls
Intellectual Property & Patent Review
Accident Reconstruction / Animation
Computer Aided Design
Education & Training
Electrocution & Switch Malfunction
Grounding & Lightning Protection
Lightning Impulse Testing
Products and Premises Liability & Safety
High-Voltage & Current Power Systems
Bridge Design and Safety
Fire & Explosion Cause and Origin
And Much More...


At RWFE, we proudly distinguish ourselves by our Four C's:

CREDENTIALS. COMPETENCE. CREDIBILITY. COMMUNICATION.

Credentials:B.S., M.S., M.Eng., M.B.A., J.D., and Ph.D. Degreed
Licensed Professional Engineers in Mechanical, Electrical, and Civil Engineering
Tenured University Professors and Professionals
NAFI Certified Fire and Explosion Investigators (CFEI)
Licensed Master Electricians
Competence:Over 80 Combined Years of Experience in Engineering R&D, Industry, Academia, Consulting, and Expert Witness Litigation Support
Over 120 Combined Deposition and Court Testimonies
Credibility:Internationally Recognized in Our Areas of Expertise
More Than $19 Million in Peer-reviewed and Funded Research Grants
Over 200 Combined Scientific Publications and Journal Articles
Communication:Over 20 Different Undergraduate and Graduate-level University Courses
Over 30 Invited Short Courses, Talks, and Lectures

Design Evaluation – Accident Investigation – Intellectual Property
Failure Analysis – Fire Cause & Origin – Component Testing
Computer Aided Drafting – Accident Animation
Expert Witness & Litigation Support

www.ExpertEngineering.com
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Daniel Rapperport
8 Wallis Court
Lexington MA 02421
USA
phone: 781-862-9001 or 339-222-2822
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Rapperport Associates, Inc., provides exceptional capability in Failure Analysis, Fire and Explosion Investigation, Accident Reconstruction, Structural Analysis, Mechanical and Electrical Engineering, Metallurgy and Materials Science.

We have provided superior technical support for litigation since 1974, and possess an extraordinarily talented technical team with impeccable academic and industrial credentials and proven analysis capability. Our team of distinguished scientists and engineers is drawn principally from Massachusetts Institute of Technology (M.I.T.) and Stanford University.

AREAS OF EXPERTISE:

Failure Analysis
  • Structural Design Analysis
  • Metallurgical Failures
  • Finite Element Stress Analysis
  • Fracture and Fatigue Analysis
  • Scanning Electron Microscopy
  • Corrosion

  • Accident Reconstruction
  • Automobiles / Trucks
  • Biomechanics / Injury Mechanism
  • Off-Road Vehicles
  • Occupant Motion
  • Aircraft
  • Animation

  • Fire & Explosion Analysis
  • Cause and Origin
  • Electrical
  • Gases, Liquids and Dust
  • Industrial Processes
  • ........Safety
  • Machine and Industrial Safety
  • Machine Guarding
  • Construction Failures
  • Slips, Trips, Falls


  • Engineering
  • Mechanical
  • Structural / Civil
  • Metallurgy
  • Materials Science
  • Aeronautics and Astronautics
  • Electrical
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    Dr. J.P Purswell, PhD, PE, CPE
    Ergonomics & Safety Expert
    2035 Mulligan Drive
    Colorado Springs CO 80920
    USA
    phone: 719-330-0126
    fax: 719-265-6905
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    Dr. J. P. Purswell, PhD, PE, CPE has extensive experience in Human Factors, Ergonomics and Safety Engineering. He holds a doctorate in Industrial & Systems Engineering from Virginia Tech. A member of the Human Factors and Ergonomics Society and the American Industrial Hygiene Association, Dr. Purswell served as the past Chair of the Industrial Engineers PE exam from 2005 to 2009. He continues to serve on the committee which is responsible for the preparation of the national professional engineering examination in industrial engineering.

    Dr. Purswell is the author of more than 20 publications and presentations on Product Safety, Occupational Safety, Printed Warnings, and Auditory Warnings. Examples of products addressed include silica, asbestos, cleaning chemicals, gasoline containers, and recreational equipment. Dr. Purswell maintains NIST-calibrated equipment for the measurement of light, sound, force, and whole-body and hand-arm vibration in addition to standard photo and video equipment.

    Dr. Purswell has been an Expert Witness in the legal industry since 1997. He has been qualified as an expert in state and federal courts across the nation in safety engineering, including safety analysis techniques such as Fault Tree Analysis and FMEA as well as product warnings / instructions and OSHA compliance issues. Dr. Purswell's services include site inspections, document review, drafting Rule 26-compliant reports, deposition, and trial testimony. He has been retained by attorneys for both Plaintiff (40%) and Defense (60%) more than 100 times, has been deposed approximately 50 times, and has testified at trial over 20 times.

    Areas of Expertise:
    • Warning and Safety Instructions
    • OSHA Compliance
    • Chemical Accident Prevention
    • Product Safety
    • Lockout / Tagout & Machine Guarding
    • Trucks and Forklift Accidents
  • Power Tools Safety
  • Hazard Communication - Audible Alarms
  • Employer Safety Training and Supervision
  • Perception / Reaction Time
  • Ergonomic Work Practices
  • Working and Walking Surfaces - Slip, Trip and Fall
  • View Dr. Purswell's Consulting Profile.
    10/10/2013 · Ergonomics
    In 2005 a summary of "General Duty Clause" citations issued for ergonomic hazards was published (Purswell & Purswell, 2005). That summary showed that the primary area of ergonomics citation activity under the "General Duty Clause" (paragraph (5)(a)(1) of the OSHAct of 1970) by OSHA to that point had been concentrated in nursing homes, peaking in 2002 and 2003.

    The purpose of the current study was to update and expand upon an earlier study performed to review and categorize OSHA accident investigation records for pedestrian-backing vehicle accidents according to whether the backing vehicle had a backup alarm and whether the alarm was installed and functioning as intended. The current study includes an analysis of additional records as well as the business type (SIC code) of the employer.

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    Christopher Lane
    President
    1021 SW Klickitat Way #106
    Seattle, WA 98134
    USA
    phone: 909-986-1141
    fax: 909-986-1147
    POWERPLANT Specialists, Inc., (PPC) is a technical services company providing highly specialized support services for Industrial Power Generation Systems, Cogeneration and Combined Cycle Power Plants. PPC specializes in Design, Performance, Forensics, Construction, Design Defects, Cost Analysis for Lost Operations, Maintenance, and Repair. PPC has extensive international experience and is OSHA Lockout / Tagout Certified.

    Areas of Expertise
    • Power Generation
    • Marine Propulsion - Conventional / Alternative Fueled Systems
    • Microturbines
    • Boilers
    • Industrial Gas Turbines
    • Diesel Engines
    • Cogeneration
    • Geothermal
    • Landfill
    • Digester Gas
    • Wind and Solar Powered Generation Systems
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    David Kassekert
    P.E.
    4017 Washington Road #344
    McMurray (Pittsburgh) PA
    USA
    phone: 866-344-7606
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    Keystone Engineering Consultants, Inc. is a multi-discipline, broad-spectrum firm providing comprehensive and qualified forensic engineering, architecture, scientific, and fire/arson investigation expert services to the legal community, insurance industry, and the public and private sectors.

    A professional evaluation by any of our 40+ professionals and consultants can help solve problems in a cost-effective way. We listen to the needs of our clients and offer unbiased, ethical, and professional opinions backed by education, experience and scientific testing.

    We are available for consultation and review of the factual information involved with a case to determine the worthiness of the matter prior to committing to a full investigation.

    Areas of Expertise / Practice Include: Accident Reconstruction; A/E Professional Liability; Amusement Park Rides; Aviation Issues; Biomechanics; Blasting, Quarry and Construction Explosions; Building Condition Assessments; Chemical, Civil, and Electrical Engineering; Geotechnical, Industrial, and Mechanical Engineering; Structural Engineering; Commercial Claims; Construction Accidents/Disputes/Failures; Electrical Systems and Controls, Electrocutions and Shocks; Elevators & Escalators; Environmental Issues; Fire, Explosion and Arson Investigations; Fire Prevention; Forensic Architecture; Hazardous Materials; Health and Safety Issues; Heating, Ventilation and Air Conditioning; Human Factors; Indoor Air Quality and Mold Investigations; Industrial Safety, Ladders and Scaffolds; Machine Guarding and Safety; Material Failure Analysis; Motor Vehicle Crashes; Non-Destructive Testing; Playgrounds, Parks, Health Clubs and Recreational Facilities; Personal Injury; Premises Liability; Product Liability; Property Damage; Roadway Design Issues; Slips, Trips and Falls; Subrogation; and Toxicology.

    Offices serving Pennsylvania, Ohio, West Virginia, New Jersey, Delaware
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    Dr. Kenneth A. Solomon
    Chief Forensic Scientist, Technical Director
    5324 Canoga Ave.
    Woodland Hills CA 91364
    USA
    phone: 818-348-1133
    fax: 818-348-4484
    Areas of Expertise:
  • Accident Reconstruction
  • Biomechanics
  • Human Factors
  • Safety
  • Accident Prevention
  • Adequacy of Warnings
  • Building Codes
  • Coefficient of Friction
  • Construction Defect
  • 3D Scans
  • Failure Analysis
  • Industrial / Recreational / Structural
  • OSHA Compliance
  • Premises Liability
  • Product Integrity / Testing
  • Computer Animation and stimulations
  • Defense and Plaintiff Cases
  • Civil & Criminal
  • Educational Seminars
  • Litigation and Non-litigation
  • Mediation / Arbitration Services
  • Court Testimony over 2000 x's


  • Auto • Airbag • Bicycle • Boating • Bus • Chair Design / Safety / Failure • Diving and Drowning • Electrocution and Shock • Elevator • Escalator • Fires and Explosions • Forklift • Gate • Golf Cart • Highway Design and Safety • Ladder • Law Enforcement • Lighting & Illumination • Loading Dock • Metallurgy • Motorcycle • Paintgun • Playground Safety • Press • Ramps • Rollercoaster • Safety Guards • Scaffolding • Seatbelts • Slip / Trip and Fall • Spas • Stairs • Swimming Pool Design and Safety • Tractors • Trailers • Trucks • 3D Scans
    3/26/2014 · Warnings & Labels
    In essence, to warn is to place someone on advance notice of a danger or a potential danger. To warn requires that the person or people giving the warning have a superior knowledge of the harm or potential harm compared to the person or people exposed. Further, the person or the people who are warning must also have a superior knowledge of the means of reducing either the likelihood and/or the magnitude of the harm or potential harm as compared with the person or people exposed.

    Air bag control modules utilize complex algorithms to make air bag deployment decisions based on crash severity related to the change in vehicle speed or deceleration over time. Due to the proprietary nature of air bag deployment algorithms, the velocity, acceleration, or displacement thresholds for air bag deployment during a collision are not easily obtained; however, a range of frontal barrier impact speeds and corresponding deceleration and displacement threshold values for air bag deployment can be approximated using known vehicle stiffness-to-weight ratios.

    6/28/2013 · Medical
    The purpose of this article is to show the relationship between the mechanism of an ankle injury (inversion, eversion, etc.) and the most likely result of the injury (sprain, fracture, etc.).

    5/22/2006 · Injury
    The purpose of this article is to distinguish the mechanism of knee injury (e.g., forward fall while foot is trapped, impact of knee on dashboard, chronic injury due to repetitive twisting, etc.) from the type of injury (e.g., torn meniscus, ruptured ACL, bursitis, etc

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    Don Skaff
    Managing Director
    Worldwide Availability. Offices in Singapore & UK
    111 Deer Lake Rd, Suite 100
    Deerfield IL 60015
    USA
    phone: 800-326-5075 and Local 847-559-3000
    fax: 847-559-3010
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    Envista Forensics is a global leader in Forensic Engineering & Recovery Solutions. They provide Cause & Origin, Failure Analysis, Fire and Explosion Investigations, Accident Reconstruction, Damage Evaluations and Equipment Restoration Services following disasters of all kinds. Envista has served the insurance, legal and risk management industries for over 25 years. Their Experts travel globally from 19 offices located across the U.S., Canada, the U.K. and Singapore.

    Envista's experience counts when equipment, systems, structures, or data have been threatened by catastrophe or litigation. Their experts and advisors determine cause and responsibility, and identify the nature and extent of damage or loss and provide a full range of solutions to protect their assets. Envista's technical professionals are trusted advisors and industry leaders. Their expertise is broad and deep, capable of withstanding all forms of scrutiny. Envista's services are available globally so that certainty is assured no matter where in the world it is needed. As the recovery from disasters has grown more complex, Envista has developed a comprehensive array of services to help their clients and has associates located around the globe to provide assurance no matter the type of loss or location of the disaster.

    Envista helps attorneys quickly get to meaningful answers on the many technical issues at the center of a dispute. Their engineers have decades of experience working with both defendants and plaintiffs. They offer effective Expert Witness Testimony, with the ability to communicate effectively, build rapport with juries and judges, and maintain adherence to structured, methodical approaches in drawing conclusions are all extremely critical. LWG Consulting understands how critical the selection of an expert can be, and we understand what makes experts effective. Their court qualified experts have extensive experience providing expert testimony on a wide variety of engineering and technical matters.

    Areas of Expertise:
    • Aviation & Aerospace
    • Biomechanics
    • Construction Defects
    • Digital Forensics
    • Electrical Injury & Electrocutions
    • Causation
    • Chemical
    • Computer / Network Equipment Failure
    • Construction Defect
    • Disputes over Reparability of Damage
    • Electrical Failure
    • Equipment Restoration
    • Fire & Explosion Analysis
    • Equipment Restoration
  • Industrial / Manufacturing Equipment
  • Materials Failure
  • Mechanical Accidents
  • Mechanical Failure
  • Medical / Laboratory Equipment
  • Product Failure / Liability
  • Project Management
  • Structural Failure
  • Subrogation
  • Utility & Energy
  • Valuation of Structures or Equipment
  • Vehicle Accident Investigation
  • Workplace / Premises Accidents
  • View Envista's Consulting Profile.
    2/18/2014 · Medical
    All is quiet at 10:30 pm until a nurse notices water on the 2nd floor hallway. Building maintenance is called and discovers a ruptured pipe fitting in a bathroom on the 2nd floor. The water is shut off at 10:45 pm but unfortunately the damage has been done. It is later discovered that water penetrated through perforations in the ceiling in the CT suite on the 1st floor exposing the 16-slice CT gantry and patient table to water.

    1/14/2014 · Machinery
    The role that water plays in our existence is well understood. Without it, most living things will rapidly wither and die. Equally catastrophic of course, are the consequences of too much water. Not only to living things, in terms of widespread flooding, but also in terms of damage to machinery and equipment from exposure to water.

    Is it possible to differentiate between lightning related surges and artificially generated electrical surges?

    E-Discovery is the process of collecting and exchanging electronically stored information (ESI) that is requested during the discovery phase in civil litigation.

    3/14/2013 · Corrosion
    An ominous cloud of smoke continues to billow as the sprinklers rain water throughout the facility. The production manager's mechanical and electrical equipment is rapidly deteriorating, and within hours, the previously pristine equipment normally used to manufacture precision circuit boards will have a thin coating of flash rust with further damage forthcoming.

    1/25/2013 · Damages
    Doctors and nurses need to make quick, educated decisions to minimize the impact of difficult situations. These decisions are based on the practitioner's years of experience, their education, the science and technology available, and with the assistance of critical analytical and diagnostic equipment.

    11/19/2012 · Damages
    A water pipe breaks in a healthcare provider's facility, saturating an MRI control cabinet. The manufacturer is called in and spends $200,000 on attempted repairs. The unit still doesn't work. The manufacturer says the entire unit needs to be replaced, at a cost of $240,000.

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    J. Marcus Hollis, PhD, PE
    8418 East Bay Blvd.
    Navarre FL 32566
    USA
    phone: 850-292-4780
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    J. Marcus Hollis, PhD, PE, is a Bio-Mechanical Engineer specializing in biomechanics, injury causation, and seat belt effectiveness, and medical device design review.

    Dr. Hollis analyzes how the human body reacts to forces generated from an accident in order to determine if the injuries are consistent with the accident event. Dr. Hollis utilizes a robust 3-dimensional simulation program to determine how an occupant moves in a particular collision, what the occupant collides with, the forces that are generated, and whether seat belt use would have prevented the reported injuries.

    Dr. Hollis is currently an Adjunct Assistant Professor in the Department of Orthopaedic Surgery at the University of South Alabama. Dr. Hollis has earned 8 United States patents in the field of Bio-Mechanics.

    Litigation Support - Dr. Hollis has testified as an expert witness in various cases on behalf of both plaintiffs and defendants. His services include medical record review, written reports, computer animation, computer simulation, deposition, and trial testimony as needed.

    Areas of Expertise:
    • Medical Device Design Review
    • Product Testing
    • Bio-mechanical Analysis of Injury
    • Product Prototype Fabrication
    • Medical Product Design
    • Bio-medical Implant Testing
  • Medical Device Testing
  • Product Liability
  • Sports Injury
  • Orthopedic Bio-mechanics
  • Patent Application Assistance
  • Patent Infringement and Validity
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    Dr. Richard Collins
    440 Monmouth Drive
    Cranberry Township PA 16066-5756
    USA
    phone: 724-742-0414
    Dr. Richard Collins, Former University Professor of Biomedical and Human Factors Engineering, Professor of Medicine, Professor of Mechanical and Aerospace Engineering. Dr. Collins has Demonstrated Accuracy in Research and Scientific Analysis in Mechanical and Biomechanical Engineering and Regulatory Assessments.

    His work has been Extensively Published in National and International peer-reviewed Literature. He is an Internationally recognized engineering and medical expert, having earned his Ph.D. from the University of California, Berkeley. Dr. Collins is qualified as an expert witness in civil and criminal courts.

    Areas of Specialization:
  • Wrongful Death, Medical Malpractice, Medical Device / Product Liability
  • Head and Spine Injury Cases in Motorcycle, Bicycle Collisions, Protective Helmet Liability
  • Accident Reconstruction / Failure Analysis - Serious Personal Injury and Trauma
  • Analysis / Injury Biomechanics: Automotive, Traffic Safety, Aircraft Crashes, Train Crashes, Forklift Turnovers, Elevator Failures, Sports Impacts, Sports, Recreational and Safety Equipment, Sports and Industrial Injuries, Ergonomics, Repetitive Stress Cases, Slips and Falls
  • 9/10/2008 · Medical
    Blunt impact to the thorax often results in traumatic rupture of the aorta, leading to immediate exsanguination. Current interest in the mechanisms of this failure is great (Roberts and Beckman, 1970), particularly with regard to vehicular fatilities in which passengers are subjected to high levels of deceleration

    9/10/2008 · Medical
    The lung constitutes a highly complex and selfregulating system for oxygenating man’s blood and removing its waste materials. It is at the alveolar level that the respiratory and circulatory functions interact and the important exchange processes occur

    9/10/2008 · Medical
    THE NUMBER of fatalities due to automobile collisions in the United States has reached an annual level of 55,000, according to the statistics of the National Safety Council. Of these, 16 per cent have been estimated by Greendyke (1966) to be due to traumatic rupture of the aorta, on the basis of a sample of 1253 automobile fatalities in Monroe County, N.Y., over a four year perio

    9/10/2008 · Medical
    The uptake of particulate matter by inhalation leads to complex transport processes influenced by unsteady convection through a non-dichotomously branching network of conducting conduits (airways)

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    Ralph Aronberg
    P.E., President
    13762 W. State Road 84, Suite 424
    Ft. Lauderdale FL 33325
    USA
    phone: 954-236-6605
    fax: 954-236-3327
    Ralph Aronberg, P.E., has reconstructed over 1,500 accidents and has testified in over 150 jury trials, since founding the firm in 1983. He provides Expert Witness services in the areas of:
  • Traffic accident reconstruction (cars, trucks, motorcycles and pedestrians).
  • Vehicle occupant kinematics (seatbelts)
  • Biomechanics
  • Traffic engineering design (geometrics, signing, markings, signals and lighting)
  • Sight distance analysis
  • Hazardous roadway conditions
  • Work Zone Traffic Control evaluation
  • Evaluation of roadway curvature
  • Traffic signal operations
  • Pedestrian safety
  • Computerized accident reconstruction and simulation
  • Vehicle "black box" data retrieval (certified>
  • Mr. Aronberg is published in the fields of pedestrian / bicycle / motorcycle accident reconstructions, and 3 Dimensional Animations and Scientific Visualizations through the Society of Automotive Engineers. Mr. Aronberg is a Fellow member of the National Academy of Forensic Engineers, and certified as a Diplomat in forensic Engineering.