APAS Tutorials

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APAS Tutorials

APAS Tutorials


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bulletLesson 1 - Introduction
bulletLesson 2 - Capturing Video
bulletLesson 3 - Step-by-step Procedures for Video Capturing
bulletLesson 4 - Trimming (In RealCap)
bulletCapture with the JVC-9800 for the 60, 120 and 240 Hz digital video camera
bulletTrimming (universal trimming program)
bulletDigitizing (automatic and semi-automatic)
bulletLesson 5 - Digitizing introduction
bulletLesson 6 - Digitizing parameters
bulletLesson 7 - Creating a new digitizing file



Analysis of Squat Jump with Bar


Ariel Dynamics Inc. invented the FIRST computerized Movement Analysis System, known as the Ariel Performance Analysis System (APAS) in 1968. The System's inventor, Dr. Gideon Ariel, developed the first on line electronic digitizing system for reducing each picture in a film sequence, and later from a video, into its kinematic components. Since 1971, Ariel Performance Analysis System has assisted medical professionals, sport scientists, and athletes, to understand and analyze movement using its advanced video and computer motion measurement technology. It surpasses all other video systems for quantitative accuracy and scientific excellence for the most cost effective choice in major medical and research and educational institutions around the world.

The Ariel Performance Analysis System (APAS) is the most advanced computer-based system for the measurement, analysis, and presentation of movement performance. It is the only technology exist today to allow video as well as markers and none markers system to integrate movement and its components. The study of the motion of living things is known as "Biomechanics" and it has evolved from a fusion of the classic disciplines of anatomy, physiology, physics, and engineering. Biomechanical quantification are based on Newtonian equations and the APAS analytic technique models the human body as a mechanical system of moving segments upon which muscular, gravitational, inertial, and reaction forces are applied. Although the system has primarily been used for quantification of human activities, it has had many industrial, non-human applications. The computerized hardware/software technique provides a means to objectively quantify the dynamic components of movement and replaces mere observation and supposition.

The APAS demonstrates significant advantages over other common approaches to movement systems. 

bulletFirst, except for specific applications requiring EMG or kinetic (force platform) data, it is non-invasive. No wires, sensors, or markers need be attached to the subject.
bulletSecond, it is portable and rarely requires any modification of the performing environment. Cameras can be transported to the site and positioned so as not to interfere with the subject.
bulletThird, the scale and accuracy of measurement can be set to the levels required for the activity being performed. Video equipment technology currently available is sufficiently adequate for most applications requiring accurate motion analysis and is normally the least expensive option, particularly when two or more cameras are needed. The APAS system was measured the best when was compared to all other systems.
bulletFourth, When you purchase the APAS system, you receive additional Workstations on any number of Notebooks or Desktop computers. This way you can "net" together all the computers to work in harmony and efficient way. Number of Universities utilizing the APAS system in the classroom, where each student has his/her own system, for no additional cost.

The ability to record the activity as a picture has a number of advantages:

bulletIt allows the scientist to make intellectual decisions regarding the joint center at each frame rather than using markers attached at the skin's surface.  However, you can use marker to do both.
bulletSubsequent quantification would be possible since the video can be re-examined at any time. You never loose your raw data !
bulletStick figure results can be overlapped with the video pictures for effective result presentations.

Applications of the APAS usage include many areas of interest.

bulletSport or athletic applications have included but not limited to, volleyball, soccer, American football, tennis, track and field events, horse racing and jumping, and golf.
bulletMedical research is using the APAS to quantify movement in Parkinson patients with and without drugs and before and after surgical procedures.
bulletJob quantification
bulletTask improvement
bulletPost-injury assessment
bulletEmployment evaluations
bulletRisk assessment,
bulletWorker's compensation
bulletDisability evaluations
bulletErgonomic evaluations of job tasks
bulletJob standardization can be useful in the workplace.
bulletIndustrial applications include product design, analysis, and improvement as well as such things as manufacturing hardware performances such as piston movement accuracy.
bulletArtistic endeavors, such as playing the violin, the harp, and the piano, have been examined biomechanically by APAS applications.
bulletMammalian research has examined thoroughbred race horse performance, feline locomotion, and monkey jumping performance.
bulletForensic analysis have included injuries sustained in football, gymnastics, horse racing, and running shoes.
bulletSpace Research have included number of research studies at NASA.
bulletRehabilitative usage include pre- and post-hip replacement functioning, gait analysis, and comparisons of bilateral functions.
bulletEducational purpose to teach students other fields through Biomechanics

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This page was last modified on 12/07/2008 at 22:47 PST. Copyright � 1994 - 2002, all rights reserved, Ariel Dynamics Inc. Please send your comments or feedback to webmaster@arielnet.com or proceed to our feedback form. This page has been accessed many times since Dec 12, 2002. Our privacy policy is here.