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Technical Paper

Safety Through Design: The State of the Art in Safety Processes

1999-03-01
1999-01-0421
The way safety is addressed in product and process design is changing. Safety is increasingly being addressed through design rather than an add-on effort after the design is complete. This approach, called safety through design or design safety, relies heavily on engineering controls rather than behavior interventions. This paper examines the emerging interest in the design safety process including six key forces pushing safety through design: costs, competition, legal requirements, international influences, risk assessment advances and the Institute for Safety Through Design (ISTD). This paper briefly reviews some of the more familiar techniques such as the Preliminary Hazards Analysis (PHA), Fault Tree Analysis (FTA), and Failure Modes and Effects Analysis (FMEA). Greater discussion is devoted to the emergence of task-based risk assessments and tools for implementing safety through design.
Technical Paper

Towards Reconstructing Minimum Speeds in Recreational Boating Accidents

1995-02-01
950732
The technical literature concerning reconstructing minimum vehicle speeds for land based vehicular accidents is voluminous. In contrast, there has been little formal study of reconstructing recreational boating accidents. This study presents data which can be used to develop recreational boating accident reconstruction techniques. Boat speed and distance from engine disengagement were measured as a function of time for six different recreational boats, at three different initial speeds, with three repeated trials at each speed. The data are compared for similarities and trends across the different boats and speeds. The data are also compared to land-based engineering equations of motion and are examined for basic parameters to use to reconstruct boating accidents.
Technical Paper

A New Application of Camera Reverse Projection in Reconstructing Old Accidents

1995-02-01
950357
Engineers frequently are faced with reconstructing vehicular accidents based on limited information, i.e. vehicles have been destroyed, witnesses are lost, etc. Accident scene photographs are often the key independent record of what occurred in an accident. One photogrammetry method engineers use to reconstruct accidents is camera reverse projection. This paper presents an extension of camera reverse projection that can be used for accidents where neither the accident scene nor the vehicles are accessible. The technique involves creating models of the vehicles and the scene which can then be used to obtain measurements for reconstructing an accident. The technique is described in detail and a case study is used to illustrate the method. The primary benefits of the method include flexibility in use, intuitive approach, and assistance in sorting out complex vehicular dynamics.
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