Use of the Talking Tactile Tablet in Mathematics Testing

2003 ◽  
Vol 97 (2) ◽  
pp. 85-96 ◽  
Author(s):  
Steven Landau ◽  
Michael Russell ◽  
Karen Gourgey ◽  
Jane N. Erin ◽  
Jennifer Cowan
Keyword(s):  
Visually Impaired ◽  
Multiple Choice ◽  
Experimental System ◽  
Peripheral Device ◽  
Working Through ◽  
Preliminary Version ◽  
Computer Peripheral

This article describes an experimental system for administering multiple-choice math tests to students who are visually impaired or otherwise print disabled. Using a new audio-tactile computer peripheral device called the Talking Tactile Tablet, the authors created a preliminary version of a self-voicing test that included 12 items, all of which referred to a graphical element. Users could take the test, working through the items at their own speed and learning about associated tactile graphic diagrams by pressing on various features to hear appropriate audio descriptions.

THE DETERMINATION OF DIGITAL WIENER FILTERS BY MEANS OF GRADIENT METHODS

Geophysics ◽  
1973 ◽  
Vol 38 (2) ◽  
pp. 310-326 ◽  
Author(s):  
R. J. Wang ◽  
S. Treitel
Keyword(s):  
Seismic Data ◽  
High Speed ◽  
Gradient Methods ◽  
Wiener Filter ◽  
Gradient Algorithm ◽  
Rapid Convergence ◽  
True Solution ◽  
Peripheral Device ◽  
Wiener Filters

The normal equations for the discrete Wiener filter are conventionally solved with Levinson’s algorithm. The resultant solutions are exact except for numerical roundoff. In many instances, approximate rather than exact solutions satisfy seismologists’ requirements. The so‐called “gradient” or “steepest descent” iteration techniques can be used to produce approximate filters at computing speeds significantly higher than those achievable with Levinson’s method. Moreover, gradient schemes are well suited for implementation on a digital computer provided with a floating‐point array processor (i.e., a high‐speed peripheral device designed to carry out a specific set of multiply‐and‐add operations). Levinson’s method (1947) cannot be programmed efficiently for such special‐purpose hardware, and this consideration renders the use of gradient schemes even more attractive. It is, of course, advisable to utilize a gradient algorithm which generally provides rapid convergence to the true solution. The “conjugate‐gradient” method of Hestenes (1956) is one of a family of algorithms having this property. Experimental calculations performed with real seismic data indicate that adequate filter approximations are obtainable at a fraction of the computer cost required for use of Levinson’s algorithm.

scholarly journals USB-based radiation monitor

2006 ◽  
Vol 21 (2) ◽  
pp. 73-78 ◽  
Author(s):  
Vujo Drndarevic ◽  
Nenad Jevtic ◽  
Radivoje Djuric
Keyword(s):  
Gamma Probe ◽  
Field Measurements ◽  
Laboratory Measurements ◽  
Laptop Computer ◽  
Universal Serial Bus ◽  
Peripheral Device ◽  
Radiation Monitor ◽  
Labview Software ◽  
Flexible Instrument ◽  
Usb Bus

The Universal Serial Bus has become a dominant interface for the connection of standard peripheral devices to a PC computer. This paper analyzes the possibilities of USB bus applications in the field of measurement and environmental monitoring. As a result, a gamma radiation monitor consisting of an USB-based universal peripheral device and a gamma probe with a GM counter, has been designed. For the interfacing monitor with the powerful and easy to use LabVIEW software package, an instrument driver as a set of virtual instruments has been developed. The proposed monitor is a flexible instrument which can be used for laboratory measurements, as an environ mental radiation monitor or for training purposes. Connected to the laptop computer, the monitor becomes a portable instrument suitable for field measurements. Basic measurements and functionality properties of the radiation monitor are presented here.

An autonomous computer peripheral for active 3D vision

1996 ◽  
Vol 7 (11) ◽  
pp. 1591-1604
Author(s):  
C McGarrity ◽  
R L Dalglish
Keyword(s):  
3D Vision ◽  
Computer Peripheral
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