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Christopher G. Koch

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Publications by Christopher G. Koch (bibliography)

1988

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Koch, Christopher G. and Ju, Ginny (1988): Video Image Presentation Methods for High-Speed Mail Piece Encoding. In: Proceedings of the Human Factors Society 32nd Annual Meeting 1988. pp. 1419-1423.

“A program of research was conducted to determine the design requirements for a prototype image processing system to provide high-resolution video images of mail pieces -- irregular parcels and pieces, flats, and letters -- and enable high-speed data entry of coding information by operators. Experiments were performed to determine effective image transition methods, pacing strategies, and image preview methods for entering numerals from ZIP Codes of mail piece addresses on a 10-key keyboard. Results showed performance advantages of response speed, throughput, and fewer misses for fade-out transition between images, combined operator and machine pacing, and image preview by early transition to the next image in queue.”

1987

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Richardson, Rose Mae M., Telson, Ronald U., Koch, Christopher G. and Chrysler, Susan T. (1987): Evaluation of Conventional, Serial, and Chord Keyboard Options for Mail Encoding. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 911-915.

“The motivation for the experiment was the integration of a work station display component and a suitable data entry device. Keying performance with three candidate keyboards was evaluated: (1) a one-handed conventional calculator keyboard, (2) a two-handed 10-key serial keyboard, and (3) a two-handed 10-key chord keyboard. Subjects were trained to criteria on a numerical data entry task and subsequently tested for performance in encoding five-digit strings. Measures of encoding response time and encoding errors showed a substantial advantage in training time for the calculator keyboard and two-handed serial keyboard over the two-handed chord keyboard.”

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Koch, Christopher G. (1987): Human Factors Evaluation of Gas Turbine Expert System. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 1133-1137.

“A research and development project is under way to specify, design, construct, and evaluate a user interface system to meet the unique requirements of a delivery vehicle for a knowledge-based system applied to gas turbine electronics maintenance and trouble-shooting. The prototype user interface is a portable device with text display, video and overlay graphics display, voice recognition and speech production, special-function keypad, and printer. A modular software structure based on a serial communications protocol between user interface device and expert system host computer provides flexibility, expandablity, and a simple, effective user interface dialog. A human factors field evaluation is being conducted to assess aspects of system usability: device hardware, system operability, information presentation effectiveness, and user training.”

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