Kristopher J. Seluga, PE, is a Mechanical Engineering, Accident Reconstruction, Biomechanics, and Safety Expert with over 20 years of experience. He received his Bachelor’s and Master’s degrees from the Mechanical Engineering department at MIT where he worked on the development of novel three-dimensional printing technologies.
Mr. Seluga is also a licensed Professional Engineer in New York and Connecticut, and has served as a member of the ANSI engineering committee for the Z130.1 and Z135 standards for golf cars and PTV’s. His research interests and peer reviewed publications span the topics of Motor Vehicle Dynamics, Product Safety, and Biomechanics.
Litigation Support - Mr. Seluga has been working as a forensic engineer at Technology Associates since 2001. He has investigated 100s of accidents for both plaintiffs and defendants. Mr. Seluga has been qualified to testify as an expert in state and federal court and is experienced in testifying in depositions and trials. He has successfully defeated Daubert / Frye challenges and can prepare and explain compelling exhibits at trial.
Airbags are credited with reducing numerous injuries and saving many lives during vehicle accidents. However, there have been incidents where they do not function as intended, and have even caused injuries such as explosive powder burns, detached eye retinas, child suffocation and impact deaths.
Animations are useful visual tools that can help jurors understand how an incident could, or could not, have occurred. Simply describing an event in court, or showing still pictures, may be insufficient to explain a complex sequence of events.
Biomechanics is the application of mechanics to the interaction of biological systems with their external environment. When investigating an accident, biomechanical analysis can be used to reconstruct a victim’s motion and relate it to his injuries.
When an understanding of complex motions associated with various accidents is required, computer simulation is an invaluable tool, which allows the modeling and visualization of rollovers and collisions. In addition to vehicle accidents, computer simulation can also be used to create many other systems of masses and contacting surfaces, such as a toppling light pole after it has been struck.
Construction sites and equipment present many hazards if proper care is not taken. The space in and around a construction site is often filled with potentially dangerous, high-powered equipment capable of delivering high forces.
Doors and gates, whether automated or manual, can pose a serious hazard to users if not designed, manufactured, installed and maintained properly. The different types include automatic doors, overhead garage doors, elevator doors, sliding doors, swinging doors, and automatic gates.
Electric fires are becoming more common as appliances and electric feeds are used more and more in our daily lives. Like other fires, the root cause of an electric fire is the introduction of heat, oxygen, and fuel.
Electric power and electronic appliances are so integrated with modern life that there is a high degree of likelihood that everyone will receive one or more electric shocks in a lifetime. In many cases, only trivial power levels are involved.
Second only to automobile accidents, falls are the leading cause of injury and deaths. Of these, accidents due to slipping or tripping form a large proportion. Slips and trips occur on floors, streets, walkways, stairs, etc.
Forklifts, industrial trucks, skid steer loaders, bobcats and other similar material-handling machines are often difficult to maneuver and susceptible to a wide range of accidents. Their nature exposes operators and nearby co-workers to falling loads, crushing hazards and lading dock falls.
There are roughly 9,000 golf cart related accidents requiring emergency room treatment in the United States each year. The majority of these accidents are related to either braking, cart rollover or passenger ejection. These problems are common to golf carts due to their open design, lack of seatbelts, poor braking capabilities and the uneven terrains they are driven on.
The primary function of all guarding is to prevent an operator or bystander from being injured by a potentially dangerous portion of a machine. Often the hazard involves moving parts with the potential to cut, crush or draw-in body parts, although barrier guards may also be necessary when electrical, thermal or chemical dangers are present.
Human Factors and Ergonomics (HFE) is a branch of science, which is concerned with man’s interaction with his universe. Thus, it is not simply the study of pure science (e.g. sound or light), but rather man’s understanding and reactions (e.g. to hear and see).
There are over 100,000 ladder accidents annually in the U.S. requiring hospital emergency room treatment. Although many of these result from user misuse, such as an improper extension ladder lean angle against a wall causing it to slip outward, use of a damaged ladder, or failing to lock a step ladder’s spreaders, many ladders fail due to design or manufacturing defects.
Motorcycles, like passenger cars, are capable of high speeds and must share the road with other vehicles. However, unlike passenger cars, motorcycles are capable of rapid accelerations, offer little protection to the operator during a collision and require special skills to maneuver effectively.
In many vehicle accident investigations, it is necessary to know not only the speeds and motions of the vehicles involved, but the causes of injuries suffered by their occupants as well. Such investigations seek to answer questions regarding occupant ejection, effects of seatbelt use, airbag deployment and body-interior impacts.
Parking lots are the scene of many pedestrian accidents because of the close proximity of people and cars and the confusing traffic patterns that sometimes exist. In addition to pedestrian-vehicle collisions, many trip and fall accidents occur in parking lots as well.
Though swimming pool accidents are sometimes the result of reckless participant behavior, they can also be caused by inadequate supervision, warnings, structures, or defective pool design. Structures commonly found in or near swimming pools include slides, ladders, diving surfaces and fencing.
Approximately 125,000 serious injuries occur in the US each year related to the use of portable and fixed power saws. Lacerations and similar injuries, such as abrasions and avulsions, account for over 90% of these, which generally occur to males and result in losses in the tens of millions of dollars annually.
An end user of a product expects that a given product will not only function as intended, but will be safe from non-obvious hazards. Based upon decades of experience with mishaps during use of common and specialized equipment, thousands of standards have been developed for many consumer products and industrial equipment. Numerous organizations exist, e.g., ANSI, ASTM, SAE, and ASME, that regularly review and update these standards.
Places of business, residences, parking and recreational areas contain potential accident sources such as slippery floors and stairs, product displays, automatic doors, ledges, railings, elevators, escalators and other hazardous items. To prevent such items from causing injury to the public, premises owners and their agents have a responsibility to recognize unsafe conditions and exercise reasonable care to maintain or make conditions safe, or warn the public of the risks involved.
Supermarkets, pharmacies, home improvement, and department stores expose their customers to many potential accident sources such as floors and aisles, which can become unsafe, and display merchandize that can topple or cause tripping. To prevent such accidents from occurring, these establishments should maintain routine scheduled inspections to insure that unsafe conditions are detected and corrected before accidents occur.
In many vehicle rollover investigations, it is necessary to know not only the speeds and motions of the vehicles involved, but the causes of injuries suffered by their occupants as well. Such investigations seek to answer questions regarding occupant ejection, effects of seatbelt use, roof crush and body-interior impacts.
Motor vehicle seatbelt use provides highly effective protection in frontal collisions for impact angles up to 30 degrees off-center (i.e. between 11 and 1 o’clock). All states have laws requiring their use for front seat passengers, as they have been shown to reduce moderate to severe injuries by 50%. They are less effective when your car is hit in the rear or side and sometimes their locking devices malfunction or the anchorage gives way.
Recreation, sports, and gym equipment are subjected to large dynamic forces and must be designed to support these loads and protect users from unintentional hazards. Adequate instructions and warnings may be required if their assembly and proper use are not obvious.
Codes and standards specify criteria necessary to ensure that a product, material or process will consistently and safely perform its intended function. Although standards provide minimum design requirements, conforming to a standard is not always sufficient in preventing an accident.
Structural failure can often produce catastrophic results. In many cases, the damage seen after the accident is not indicative of the cause of the initial failure. Fortunately, based on physical evidence, an investigator can frequently determine how and why a structure failed.
Heavy trucks, whether tractor-trailers, construction vehicles or garbage haulers, are involved in many serious traffic accidents due to their large weight, high centers of gravity, decreased visibility, poor handling and reduced braking efficiency. In addition, articulated tractor-trailers are subject to additional problems such as jack-knife and trailer sway instabilities.
Motor vehicle accidents are the most common type of incidents producing injury in the US. The main issues in litigating automotive accidents involve vehicle speeds, seatbelt usage, airbag deployment, vehicle component failure (e.g. steering, braking), roadway design, occupant biomechanics, rollover, visibility, etc.
A person’s interaction with his environment comes largely from visual cues. Without this information, a pedestrian can trip over an unseen object or a driver might not detect a dangerous situation. In order to avoid these hazards, a person requires adequate lighting and should be provided with appropriate illumination for a given task.
A warning must inform individuals of a danger, which would not be obvious to them. It must tell them how to avoid the danger, and be easily understood. It should also provide them with the consequences of not heading the warning.
A car is stopped for a light when it is unexpectedly rear-ended causing little or no damage to either vehicle. Nevertheless, the passengers of the struck vehicle complain of neck, shoulder and back pain. Insurance claim representatives, attorneys, medical, engineering and biomedical experts are then brought in and various conflicting allegations, testimony and opinions are expressed.
Pedestrian and bicycle accidents in the United States result in approximately 80,000 and 50,000 injuries each year, respectively. Though pedestrians and bicycles move differently, they share important characteristics as both have little protection during a roadway collision with a motor vehicle.
A standard can be defined as a document issued by a recognized agency, and dealing with design and/or safety requirements relating to a specific product or type of activity. Such agencies include the U.S. Occupational Safety and Health Administration (051-IA) and the American National Standards Institute (ANSI). OSHA standards are generally legally binding for an employer, while ANSI standards are generally of an advisory nature. The term "industry standard," however, is ordinarily taken to have a broader meaning, including formal standards as just defined, and also including designs and procedures not required in formal standards, though prevailing in a specific industry, and which represent generally accepted custom and practice.
Persons with no training in engineering are generally unaware of the nature of engineering analysis, and so tend to assume that testing, as a means of determining the causation of accidents, is a dominant tool of the engineer. In the following examples, we shall undertake to explain the nature of engineering analysis, and to show that it is more basic than testing because testing without analysis is meaningless. Further, while analysis is always necessary in accident reconstruction, testing is only sometimes necessary.
Second to automobile accidents, accidents due to falls are the leading cause of injury and death. Of these, accidents due to slipping (not tripping) form a large proportion. Slipping may occur on floors, walkways, and stairs or steps. For Introductory purposes, however, the present discussion will be limited to slipping on flat surfaces such as a floor or sidewalk.
When a person becomes aware of a dangerous situation, a time-interval must elapse before he can take defensive action against it. This time interval, commonly called the reaction time, has been found to be about 0.7 second for all normal persons, regardless of their background and training. This suggests that the reaction time depends on some basic aspect of the human physiology-involving the brain, nervous system, and muscles-which does not vary much from person to person.
A car is stopped for a light when it is unexpectedly rear-ended by a vehicle from behind. It is not a hard impact and there is little or no damage to either vehicle, because the energy absorbing bumpers have protected them. Nevertheless, the passengers of the struck vehicle complain of neck, shoulder and back pain. The next day they allegedly experience even greater pain and visit a medical person who claims that they have been injured. Insurance claim representatives, attorneys, medical, engineering and biomedical experts are then brought in and various conflicting allegations, testimony and opinions are expressed. Do we have a legitimate injury claim on our hands or a situation of fraud?
Accident reconstructionists are often called on to determine the distance that a car, covers while being braked to a stop. Conversely, the reconstructionist may be given information as to the length of the skidmarks left by a car on the roadway, and may be asked to determine how fast the car must have been going at the beginning of the skid. An expert can accomplish this with considerable accuracy, based on a knowledge of the physical principles that are involved, plus available information relating to the friction of tires on various types of road surfaces.
According to the Consumer Products Safety Commission (CPSC), there are approximately 10,000 golf car related injuries requiring emergency room treatment in the US each year. One significant mode of injury in golf car accidents is passenger ejection, which can lead to serious injuries, especially of the head. Based on CPSC statistics, roughly 35% of golf car accidents involve a person falling out of the car. In addition to ejection accidents, at least 10% of golf car accidents involve a rollover and statistics indicate that such accidents are roughly twice as likely to lead to injuries requiring a hospital stay as non-rollover accidents.
According to Consumer Product Safety Commission (CPSC) accident estimates, tens of thousands of stepladder accidents requiring emergency room treatment occurred annually in the United States. Approximately 85-90% of these accidents involve the user falling from the ladder and 8-9% of these injuries are serious enough to require that the victim be admitted to a hospital. In addition to posing a severe health concern, these accidents have significant loss-of-wages and high medical expense implications.
Participation of the proper automotive expert in a personal injury lawsuit can govern its success. This article develops four basic principles to optimize their use, while minimizing their cost, and describes some important techniques used by the accident reconstructionist
David G. Curry, PhD, CHFP, CSP, is part of Solution Engineering Group, which has experts representing a wide variety of engineering and scientific disciplines. Each has the ability to work as a team, matching your needs with the right Expert. Dr. Curry consults on all aspects of Human Factors, Applied Human Performance, Ergonomics, and Safety. He has over 30 years of experience working in accident investigation, product design and development, operational testing and analysis, and both laboratory and field research in the control / display, aviation, and surface vehicle arenas.
Dr. Curry holds graduate degrees in Experimental, Human Factors, and Cognitive/ Perceptual Psychology, Industrial Engineering, and Business. He retired as a Lieutenant Colonel from the Air Force Reserve, where he worked with the Air Force Research Laboratory in the area of display technologies, aircrew training, and pilot-vehicle interfaces.
Litigation Support - Dr. Curry is recognized as an expert in operator-vehicle interaction and is both a Certified Human Factors Professional and Certified Safety Professional. He holds several patents and has or does serve as a member of national standards-making committees for a variety of organizations (e.g., ANSI, ASTM, and SAE.) Dr. Curry has provided expert testimony in both State and Federal courts.
Areas of Particular Expertise:
Human / Machine Interface Design and Evaluation
Human Capabilities and Limitations in Applied Environments
Instructions and Warnings
Perception / Vision / Visibility
Slips / Trips / Falls
Evaluation of Equipment / Facilities / Structures from a Human Use Standpoint
The public looks to safety professionals for guidance as experts in risk avoidance and hazard mitigation. This is reasonable as they are ostensibly trained in that area and, thus, in a better position to evaluate the risks inherent in different activities and to assess what can and should be done to alleviate or reduce those risks to an acceptable level. As such, it behooves safety professionals to be aware of not only safety-related heuristics that are presented to the public, but also the research that underlies that guidance to assess the appropriateness of the various safety rules that are promulgated to address potential hazards. In the real world, however, ostensible safety experts often simply accept these rules as representing appropriate, normal or typical behavior based on longevity, common sense or the simple frequency with which they are expressed.
Scott L. Turner is a highly qualified Commercial Motor Vehicle (CMV) Transportation Expert, FMCSR Regulatory and PHMSA-HMR Expert with approximately 30-years experience in the highly specialized field of CMV crashes and incidents, and 16 years as the CEO of a nationwide CMV crash & HazMat disaster response corporation.
Mr. Turner's career includes personal response and/or investigation of over 1,000 CMV crashes, 200 cargo-tank truck crashes/incidents and a multitude of industrial setting incidents including fixed facilities, loading docks and loading rack disasters. His FMCSR and PHMSA knowledge (Federal Enforcement Training), detailed reporting and testimony can be a focal point of any civil litigation, where commercial motor vehicle crashes and/or transit incidents are at issue, with or without hazmat involvement. Mr. Turner is qualified in both the Federal Court system as well as multiple States throughout the United States and testifies on an approximate 50/50 average of Defense to Plaintiff ratio.
Areas of Expertise:
Level 1 FMCSA Inspections
Commercial Motor Vehicle (CMV) Post-Crash Inspection
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 Areas of Expertise Include:
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:
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
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
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
Over 20 Different Undergraduate and Graduate-level University Courses Over 30 Invited Short Courses, Talks, and Lectures
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.
Quality Forensic Engineering, LLC is a full-service forensic engineering firm, providing engineering support to clients in the areas of accident reconstruction, premises liability, and product liability. With over 20 years of experience for each of our senior engineers, we utilize the latest technology for documenting evidence and retrieving data including FARO 3D scanning, aerial drone imaging, and black box downloads. Our forensic engineers are mobile, supporting clients throughout the U.S. We are headquartered in Tallahassee, Florida with remote locations in Jacksonville, Florida and Tucson, Arizona.
Dr. Brian Pfeifer, P.E.,
With over 20 years of experience investigating and testifying in cases involving a variety of forensic engineering issues, Dr. Pfeifer is a leading expert in accident reconstruction, roadside safety, maintenance of traffic, and analysis of mechanical systems, and product failures. Dr. Pfeifer has a strong background in the design, development, and implementation of roadside safety hardware including guardrails, bridge rails, and crash cushions. Over 33 patents have been filed worldwide on behalf of Dr. Pfeifer and associated colleagues who invented safer guardrail systems and terminals, vehicle storage systems, shipping container handling systems, and material handling and storage methods.
Dr. Pfeifer has published numerous papers to various organizations including the Transportation Research Board and Port Technology International, covering topics ranging from new guardrail systems, energy-absorbing guardrail terminals, and breakaway mechanisms incorporated in traffic signs to material handling technology. Dr. Pfeifer’s expertise has been shared with many organizations such as the Florida Justice Association, Palm Beach County Justice Association, American Bar Association, Defense Research Institute, and Alabama Defense Lawyers Association with presentations he’s made on topics including vehicle collisions, bicycle accidents, roadway constructions zones, and accident reconstruction expert witness utilization.
Dr. Pfeifer is a registered Professional Engineer in three states and stays current with learning new technology in the field of forensic engineering. He has refined his skills and knowledge of accident reconstruction and roadside safety by taking dozens of continuing education courses over the span of his career.
Tractor / Trailer Collisions
Black Box Analysis
Product Failure Analysis
Maintenance of Traffic (MOT) evaluation
Restraint System Analysis
Ms. Traci Campbell, P.E., CXLT,
Ms. Campbell is an Industrial engineer with specialties in industrial accident reconstruction, including slip, trip, and fall analysis, human and environment interaction, forklifts, applicable standards and guidelines, and workplace-safety issues. Her expertise also includes vehicular accident reconstruction involving automobiles, trucks, tractor-trailers, and recreational vehicles, as well as, product failure analysis.
Slip / Trip / Fall
Retail Facility Safety
Human and Environment Interaction
ANSI / ASTM / Building Codes
Guarding & Warnings
Forklifts and Construction Equipment
Theme Parks / Recreation Safety and Facilities
Tractor / Trailer Collisions
Airbag and Black Box Analysis
Product Design / Failure Analysis
Mr. Chris Yates, P.E.,
Mr. Chris Yates, P.E., is a Mechanical Engineer with specialties in accident reconstruction, including electronic module downloads for both automobile airbag modules and tractor-trailer electronic control modules. His expertise includes auto accidents, tractor-trailer accidents, bicycle accidents, pedestrian accidents, and other roadway accidents. His expertise also includes seat belts, occupant kinematics, product failure analysis, and other general engineering issues.
Mari S. Truman, PE, has more than 37 years of experience in Orthopedic Product Design and Development. As Principal Engineer with her company, Orthobiomech, LLC, she acts as an R&D design and development consultant to the orthopaedic industry and an injury biomechanics and medical device forensic expert.
Ms. Truman's design experience includes implants and instrumentation systems used to repair fractured bones, torn ligaments and/or to reconstruct spine, knee, wrist, hip, ankle, elbow, thumb based cmc, and other finger and toe joints for many of the USA based orthopaedic conglomerates and a few Asian, Australian and European firms.
Having designed and developed implants and instruments used for both human joint reconstruction and skeletal trauma repair, Ms. Truman is named on 12 Orthopaedic Patents and frequently gives talks on implant design and injury biomechanics on topics such as: knee and thumb-based joint surfaces and kinematics, joint design, rapid prototyping, medical device design control, and injury biomechanics.
Litigation Support - Ms. Truman has been providing Forensic Impact and Injury Biomechanics and Orthopedic Biomechanics to the legal industry for over 15 years. She draws on her strong knowledge of FDA and ISO EN13485 compliant design control processes, failure modes and effects analysis, clinically relevant tissue loading, and design safety assurance, including device performance requirements and warnings, during her medical device litigation reviews. Ms. Truman has a strong knowledge of the production and quality assurance processes used in the manufacture, cleaning, and sterilization of medical devices and the effects of such processes on product performance.
Analysis of Traumatic Injuries Related To:
Falls and Fall Recovery
Assaults and Fights
Occupation or Workplace
Failed Medical Implants
Sports and Recreation, Occupational Overuse / Injury
Established in 2000, Laird are an Expert Witness services firm supporting the Legal sector across the UK. They understand the importance of providing an efficient and seamless customer journey and review their processes continually to ensure that they achieve and surpass expectation levels daily.
With constantly evolving IT systems and exceptional customer service, Laird are leading the way in the Expert Witness sector. You can instruct with the click of a button via their website and will be kept up to date at every stage of your case.
The experts at Miller Engineering are Ann Arbor-based professional engineers celebrating 30 years of service to University, Government, Insurance, and Industry through research, publications, presentations, and testimony. Miller Engineering has a staff of engineers and experts in the Mechanical, Chemical, Agriculture, Industrial, and Human Factors fields of engineering with specific knowledge in the following areas:
James M. Miller, PE, PhD – Founder Dr. Miller is an Emeritus Professor at the University of Michigan College of Engineering and a registered professional engineer and consultant with over 30 years of experience as an expert witness. He has served as a consultant to industry and government and is highly qualified to give engineering testimony.
Dr. Miller specializes in warnings, labeling and instruction manuals, consumer product design, machine guarding, process safety, fire science, vehicle visibility, tractor egress/ingress, pedestrian and worker slip and fall prevention, recreational vehicles (ATVs, boats, and personal watercraft), compliance with occupational safety and consumer safety standards (OSHA, MSDS, CPSC, ANSI, ASTM, UL, etc.).
Mark R. Lehto, PhD – Co-Founder Dr. Lehto is a Professor of Engineering at Purdue University. He completed his Ph.D. in engineering at the University of Michigan in 1985, where he specialized inHuman Factors Engineering, in particular Warnings and Labeling. He has taught courses at Purdue in human and safety factors areas, as well as decision making and artificial intelligence. He has authored numerous professionally-reviewed articles, and he has authored / coauthored internationally-recognized textbooks in the areas of human factors and ergonomics.
Dr. Lehto specializes in knowledge engineering, warnings and instructions, structuring expert systems, accident modeling, accident statistical analysis, consumer product safety, boating safety, in-field national surveys of product usage and product information effectiveness.
David R. Clark, PE, PhD – Co-Founder Dr. Clark is an Emeritus Engineering Professor at Kettering University. He was an engineering Ph.D. graduate from the University of Michigan, where he specialized in human factors engineering and system safety analyses. In particular, his earlier degrees in mechanical and electrical areas have given him a special expertise in electrical fire- and explosion-related accidents.
Dr. Clark is also published on the topics of warnings and labeling. With considerable in-plant experience at General Motors, he is uniquely qualified to provide student theses and design projects while teaching at Kettering that deal with many types of mechanical and optimization projects. Finally, he has extensive experience working for loss control companies, performing over 150 fire origin and cause investigations in the past few years.
Introduction to Human Factors and Ergonomics for Engineers, Second Edition presents and integrates important methods and tools used in the fields of Industrial Engineering, Human Factors and Ergonomics to design and improve jobs, tasks and products. It presents these topics with a practical, applied orientation suitable for engineering undergraduate students.
Emphasizing customer oriented design and operation, Introduction to Human Factors and Ergonomics for Engineers explores the behavioral, physical, and mathematical foundations of the discipline and how to apply them to improve the human, societal, and economic well being of systems and organizations.
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.
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
Roy Theophilus Bent, Jr. is a well known and respected expert and consultant in the automotive industry. An IACP Certified Auto Appraiser, Expert Witness, and Field Inspector, Mr. Bent is the seated President of the Bureau of Certified Auto Appraisers, a National Professional Appraisal Credentialing Organization that has trained, tested, and certified over 2,400 students under his leadership in the practices of IACP Certified Auto Appraisals and Litigation assistance. Mr. Bent holds numerous licenses and credentials as an ASE Certified Mechanic, I-Car Collision Specialist, Licensed Auto Appraiser, Insurance Adjuster, Umpire, Mediator, Arbitrator, Classic Car Judge, and Vintage Car Historian.
KPRC 2 Houston News Interview with Roy Bent on Diminished Value
Litigation Support - Mr. Bent is retained by counsel to provide IACP Certified Third Party Appraisals for most auto related lawsuits. He serves law firms whose clients are involved with dissolution, probate, bankruptcy, and diminution of value, and automobile accidents. Mr. Bent is a contributing author in several peer reviewed journals in auto accident expert witness related theories, case studies, and reports which are used exclusively by other expert witnesses in the field. His services include deposition, arbitration, mediation, and trial testimony when necessary.
Appraisals for Law Enforcement Agencies - Roy Theophilus Bent, Jr., IACP Certified Auto Appraiser & Expert Witness, is regulary retained by the United States Department of Justice (DOJ), Federal Bureau of Investigations (FBI), U.S. Marshals Service, U.S. Drug Enforcement Agency (DEA), Internal Revenue Service (IRS), U.S. Attorney General (AG), U.S. Customs and Border Protection, U.S. Office of Inspector General, and varios Police Departments resumting in criminal convictions and/or exonerations of Defendants for: White-Collar Crimes, Vehicular Homicide Crimes, & Felony Drug Crimes resulting in Federal Criminal Forfeitures, Civil Judicial Forfeitures, Administrative Forfeitures & Seizures.
The purpose of this research was to determine whether or not there is a measurable relationship between the use of expert witnesses in civil litigation and the profitability of American law firms. The subjects in the present study were 1,065 American law firms which responded to a confidential survey. . .
William Guentzler, Ph.D. has over 30 years as a Forensic Examiner and 36 years as a University Professor. Dr. Guentzler specializes in the area of FAILURE ANALYSIS for autos, trucks, ATCs, ATVs, motorcycles, motor homes, marine and golf carts.
Areas of Expertise:
ALTERNATIVE FUELS / BI and DUAL FUEL SYSTEMS
HYBRID ELECTRIC VEHICLES
VEHICLE FIRE CAUSE AND ORIGIN
Dr. Guentzler has served as an Expert Witness for both Plaintiff and Defense in over 550 Cases. References are available upon request.
Dr. Kevin A. Rider, PhD, PE, CPE of Forensic Human Factors, LLC., providing investigations and expert testimony regarding predictable human behavior, particularly as it relates to motor vehicle and pedestrian collisions, premises liability, and slips, trips and falls, the design and use of products, and adequacy of warnings/instructions. His work focuses on identifying the Human Factors Elements that lead to unfortunate incidents, and what should have been done to prevent them.
Dr. Rider is a Licensed Professional Engineer and Certified Professional Ergonomist, and has studied human movements and behavior, and served as a human factors consultant since 1999, including five years teaching industrial engineering and occupational safety courses at West Virginia University. He has presented at professional conferences, both nationally and abroad, and his research is published and cited in a number of peer-reviewed journals. He continues to serve as a reviewer for conference and journal manuscripts.
Dr. Rider has testified over 100 times, and excels at educating attorneys and jurors. His services are available to attorneys for both Plaintiff and Defense.
Areas of Expertise:
Driver Behavior - Cell Phone Use and other In-Vehicle Distractions
Product Liability - Design, Guards, Warnings, Adequacy of Instructions
Premises Liability - Sidewalks, Shopping Centers, Community Parks, Retail Displays
Slips, Trips, and Falls
Visibility and Lighting - Illumination and Conspicuity of Objects
Workplace Safety - Defective Products, Gross Negligence or Misconduct, Third Party Actions on Worksites
Evidence Solutions, Inc. (ESI) is a premier Data and Information Forensics company established in 1982 to help clients obtain, understand, and utilize all the data and information available to them. We can analyze cell phones, computers, hard drives, EDRs, reconstruct accidents, provide trucking standard of care consulting, recover digital data, and provide expert witness testimony in our many areas of expertise. Our experts can help you understand what needs to be done, what should have been done, and what to do next. Call us today so we can help you!
Litigation Support - Evidence Solutions' team of expert witnesses provide litigation services in digital forensics, auto and truck accidents, accident reconstruction, EDR forensics, sports injury, police standards and policies, CMV standards, Greek fraternity issues, product failure analysis, and medical record recovery and analysis. No matter how complex the case, they can help you discover what happened and present it in a way that everyone can understand.
Areas of Expertise:
Auto & Truck Accidents
Cell Phone Forensics
Black Box Forensics
Police Standards and Policies
Greek Fraternity Issues
Product Failure Analysis
Medical Record Recovery and Analysis
Real Estate Transactions
Triangulation / GPS
Featured ESI Experts:
John Ross - Commercial Motor Vehicle - Heavy Vehicle - Truck Driving Standard of Care ExpertWitness
John Ross has been driving commercial vehicles professionally since 1993 and boasts a blemish-free, no violations record. His experience includes owner/operator, safety director, and compliance director. He has significant experience in safely transporting hazardous materials (HAZMAT) including oil field operations and transportation. John also has significant experience in loading, unloading, and load securement.
Expertise: Commercial Vehicles (18 Wheeler), Commercial Vehicle Safety Facilitator, Tractor-Trailer Inspection, CMV Operations, HAZMAT Handling, HAZMAT Driving, Tractor Maintenance, Trailer Maintenance, Professional Driving, Standard of Care Expert, Trailer Loading and Unloading Safety, Truck Driver Actions, Truck Driver Responsibilities, Driver Qualifications, Driver Training, Federal Trucking Regulations (FMCSRs), State Trucking Regulations, Driver Training Instructor, Double & Triple Trailer Driving, Trucking Industry Safety Standards, Loading and Unloading of Hazardous Liquid Safety, Oil Field Heavy Trucking Expertise, Electronic Logs / Electronic Logging
Joseph Renda - General Aviation - Unmanned Aerial Systems - Aviation Maintenance Expert Witness
Joseph Renda is an experienced General Aviation pilot with over 6,800 flight hours. He is FAA certified for Unmanned Aerial Systems, Single Engine Land, Multi Engine Land, and Instrument. Mr. Renda also has decades of experience in Aircraft Acquisition, Repair, and Sales including international acquisition. He has maintained and audited maintenance records and understands compliance and regulatory issues surrounding them.
Expertise: General Aviation Repair, FAA UAS Pilot (Unmanned Aerial Systems), Commercial Single Engine/Instrument Rating, Commercial Multi-Engine / Instrument Rating, Land Instrument Training, International Aircraft Acquisition, Airplane Paint and Interior Refitting, Photo and Video Marketing of Aircraft, Aviation Maintenance and Services, Aircraft Sales, General Aviation Pilot Standard of Care, Ultralight Instructor, Maintenance Record Keeping Requirements, Person-Machine-Environment Interface
Daniel J. Brown - Law Enforcement Standard of Care Expert Witness
Daniel J. Brown served in the Law Enforcement profession for nearly 22 years, with close to 28 years of combined policing and military service. He is a seasoned professional with proven leadership skills. He helped establish a municipal police department from inception and used this knowledge to re-build two different fledgling police departments as a police chief. Mr. Brown is a decorated military veteran of two branches of service, holds a graduate-level education, and is currently pursuing his Ph.D. His experience in law enforcement ranges from municipal, county, tribal, and military. He is also a graduate of the 267th Session of the FBI National Academy.
Expertise: Community Policing, Preventing Violence through Community Policing, Major Crimes Investigation, Police Policy and Procedure, Increasing Department Productivity, Municipal, County, Tribal and Military Law Enforcement, Threat Assessment and Management, Enhancing Community Trust, Intelligence Led Policing, School Resource Officers Management, Arizona Peace Officers, Advanced Accident Investigations, Criminal Jurisdiction in Indian Country, Firearms Instruction