Robotic neurorehabilitation is a rapidly growing field in both research and industry. Robotics offer the ability to create less labor-intensive rehabilitation for therapists, while providing an interactive experience for patients. Robotic therapy also provides the advantage of object data collection for therapists to track patient progress; however, there is still both a clinical and market need for a low-cost, assistive hand rehabilitation system. Therefore, the comprehensive design, control, and initial testing of an actuated, assistive 2 degree of freedom hand rehabilitation system with a virtual environment is presented.

Neurorehabilitation

Rehabilitation robotics

Rehabilitation engineering

10.17760/d20003342

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Computerized Facilities Inventory Pays Off.

American school & university (1975)

Patrick Murphy

Facility management

Source

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VECTOR ALGEBRA AND COPLANAR FORCES

Applied Mathematics (1982)

Patrick Murphy

This chapter discusses vector algebra and coplanar forces. If a system of coplanar forces acts at a point, it becomes convenient to know which single force acting at the point would produce the same result as the original system. Force is a vector quantity and so the resultant force is the vector sum of all the forces in the system. The chapter explains how the resultant of a system of coplanar forces is that single force, if it exists, which produces the same effect as the original system. Vector addition is called a binary operation because it combines only two vectors at a time. The chapter discusses the associative law for addition of vectors.

Associative property

Resultant force

10.1016/b978-0-434-98541-8.50011-1

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Autonomous and Portable Soft Exosuit for Hip Extension Assistance with Online Walking and Running Detection Algorithm

J. Kim Roman Heimgartner Giuk Lee Nikos Karavas David Perry

We present an autonomous and portable hip-only soft exosuit, for augmenting human walking and running that assists hip extension by delivering peak forces of 300N to the user. Different fixed assistance profiles for walking and running were applied based on an online classification algorithm. The approach is based on the biomechanical understanding that the center of mass potential energy fluctuations during walking and running are out of phase. Specifically, we monitor the vertical acceleration with an abdomen-mounted IMU at the moment of maximum hip extension. Validation is demonstrated with six subjects on the treadmill and with eight subjects outdoors. Our results demonstrated a 99.99% accuracy on average over the fourteen participants for various speeds (0.5 - 4m/s), slopes (-10 -20%), treadmill and overground terrain, loaded (13.6 kg) and unloaded, Exo On and Exo Off conditions, and different shoe types. Results from an evaluation outdoors overground on the energetics of eight subjects demonstrated a significant reduction for running when comparing Exo On to No Exo (3.9%) and for walking and running when comparing Exo On to Exo Off (12.2% and 8.2% respectively). This study represents the first demonstration of an autonomous wearable robot reducing the energy cost of running. Significant variation in response across subjects was observed, highlighting further improvements may be possible via assistance profile individualization with human-in-the-Ioop optimization.

Powered exoskeleton

Treadmill

10.1109/icra.2018.8460474

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Citations (49)

Late abscess formation following indirect hernia repair utilizing silk suture

Pediatric Surgery International (2007)

Casey M. Calkins Shawn D. St. Peter Anthony H. Balcom Patrick Murphy

10.1007/s00383-007-1894-x

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The Chassis Stabilizer

Patrick Murphy

Stabilizer (aeronautics)

Chassis

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MOTION GEOMETRY

Elsevier eBooks (1982)

Patrick Murphy

Reflection

Line (geometry)

Clockwise

Reflection symmetry

Mirror image

Parallel

Analytic geometry

Solid geometry

Plane mirror

10.1016/b978-0-434-98545-6.50015-7

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Interpretation Of UV Radiometric Measurements Of Spectrally Non-Uniform Sources

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (1988)

Patrick Murphy D. G. Gardner

Narrow bandpass UV radiometers are used in a variety of high-temperature measurement applications. These instruments are traditionally calibrated using spectrally flat deuterium lamps. Accurate calibration of these instruments requires detailed knowledge of the filter transmission function and the spectral sensitivity of the photodetector, as well as assumptions about the spectral intensity distribution of the source itself. Significant systematic errors, in the form of an apparent wavelength shift in the system response curve may be introduced when interpreting data obtained from spectrally nonuniform sources (e.g. gray-or blackbody sources). Theoretical calculations, using transmission curves from commercially available narrow bandpass filters, show that the apparent shift in the system spectral response is a function of temperature for a blackbody source. A brief comparison between the theoretical analysis and experimental data is presented.

Black-body radiation

Radiometry

Spectral power distribution

10.1117/12.946897

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