PubMed Health⌕ Search

PubMed · 6639984

Model emulates human smooth pursuit system producing zero-latency target tracking.

Abstract

Humans can overcome the 150 ms time delay of the smooth pursuit eye movement system and track smoothly moving visual targets with zero-latency. Our target-selective adaptive control model can also overcome an inherent time delay and produce zero-latency tracking. No other model or man-made system can do this. Our model is physically realizable and physiologically realistic. The technique used in our model should be useful for analyzing other time-delay systems, such as man-machine systems and robots.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

A T Bahill, J D McDonald. 1983. Model emulates human smooth pursuit system producing zero-latency target tracking.. https://doi.org/10.1007/bf00318089

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Advanced bionics thin lateral and Helix II electrodes: a temporal bone study.

OBJECTIVE: This study was performed to evaluate the insertional properties of two cochlear implant electrodes recently developed by Advanced Bionics Corporation. STUDY DESIGN: Anatomic study using human cadaveric temporal bones. METHODS: The electrode prototypes we tested are the Thin Lateral and Helix II arrays, which incorporate features designed to minimize insertional trauma. A total of eight electrodes (4 of each prototype) were evaluated after insertion into freshly fixed temporal bones. The electrodes were inserted by way of standard cochleostomies, and the specimens were subsequently dissected to assess electrode position, insertion depth, and intracochlear trauma. RESULTS: Quantitative data regarding insertion depths and contact distances from the modiolus are presented for all electrodes tested. The mean insertion depths were 368 degrees for the Thin Lateral electrodes, which are designed to approximate the lateral cochlear wall, and 436 degrees for the Helix II electrodes, which occupy a more medial position in the scala tympani. No evidence of insertional trauma was observed with either electrode. The ease of insertion and absence of trauma were confirmed during additional trials in which electrode behavior was directly observed during insertion into previously opened cochleas. CONCLUSION: Both electrodes performed favorably in our human temporal bone trials, and both arrays appear promising for clinical use, especially in patients with residual hearing in whom atraumatic insertion is an important objective.

Bionics↗

[Bionic surface design in metal on metal bearings for total hip arthroplasty--optimization of tribological characteristics].

Bionic systems are aiming to integrate natural observing into mechanical solutions. This has been realized in the design of metal on metal bearing in total hip resurface arthroplasty. The articular side of the femoral cup is covered with a dimple like surface. Under laboratory condition this so called "surf-metal-cup" achieved a reduction of the mechanical wear to almost a third part in comparison to a metal-cup with plane surface. This advantage, caused by the reduced friction-coefficient due to improved hydrodynamic lubrication could also be proved under laboratory conditions. The clinical introduction is expected to offer a significant extension of durability in this prosthetic system and needs to be proved in a long-term study.

Bionics↗