Duane's Publications

Duane O. Bowker: Publications

    • Braverman, B., Harrison, M. and BOWKER, D. O. "Captioning research at the National Technical Institute for the Deaf", Annual Meeting of the American Educational Research Association, April 1978, Toronto, Ontario.

    • BOWKER, D. O. and Sharpe, L. T. "Size comparisons of rotated gratings", Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1978, Sarasota, Florida. Abstract in Investigative Ophthalmology and Visual Science (Suppl.), 1978, 201.

    • BOWKER, D. O. and Sharpe, L. T. "Spatial frequency comparisons of rotated gratings", Perception and Psychophysics (26), 1979, 108-112. Click here to access an online copy of the article.

    • BOWKER, D. O. "Orientation-contingent distortions of spatial frequency", Annual Meeting of the Optical Society of America, October 1979, Rochester, New York. Abstract in Journal of the Optical Society of America (69), 1979, 1444.

    • Corwin, T. R., BOWKER, D. O. and Beatty, W. J. "Oblique effect as a function of contrast", Annual Meeting of the Optical Society of America, October 1979, Rochester, New York. Abstract in Journal of the Optical Society of America (69), 1979, 1445.

    • BOWKER, D. O. "Spatial frequency discrimination thresholds in different orientations", Journal of the Optical Society of America (70), 1980, 462-463. Click here to access an online an copy of article.

    • BOWKER, D. O. and Kintz, R. T. "Increment thresholds over an invisible grating", Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1980, Orlando, Florida. Abstract in Investigative Ophthalmology and Visual Science (Suppl.), 1980, 78.

    • Mandler, M. B. and BOWKER, D. O. "Shifts in apparent flicker rate following flicker adaptation", Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1980, Orlando, Florida. Abstract in Investigative Ophthalmology and Visual Science (Suppl.), 1980, 45.

    • Corwin, T. R., BOWKER, D. O. and Mandler, M. B. "Reaction time, contrast and the oblique effect", Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1980, Orlando, Florida. Abstract in Investigative Ophthalmology and Visual Science (Suppl.), 1980, 213.

    • Mandler, M. B. and BOWKER, D. O. "Differences in apparent flicker rate under conditions of monocular and binocular viewing", Topical Meeting on Recent Advances in Vision sponsored by the Optical Society of America, May 1980, Sarasota, Florida.

    • Kintz, R. T. and BOWKER, D. O. "Visual accommodation during a prolonged visual search task", Topical Meeting on Recent Advances in Vision sponsored by the Optical Society of America, May 1980, Sarasota, Florida.

    • BOWKER, D. O. and Mandler, M. B. "Binocular flicker appears faster than monocular flicker", Journal of the Optical Society of America (71), 1981, 496-498. Click here to access an online copy of the article.

    • BOWKER, D. O. "Variations in apparent spatial frequency with stimulus orientation: I. Incidence of the effect in the general population", Perception and Psychophysics (29), 1981, 563-567. Click here to access an online copy of the article.

    • BOWKER, D. O. "Variations in apparent spatial frequency with stimulus orientation: II. Matching data collected under normal and interferometric viewing conditions", Perception and Psychophysics (29), 1981, 568-577. Click here to access an online copy of the article.

    • BOWKER, D. O. and Mandler, M. B. "Apparent contrast of suprathreshold gratings varies with stimulus orientation", Perception and Psychophysics (29), 1981, 585-588. Click here to access an online copy of the article.

    • Braverman, B., Harrison, M., BOWKER, D. O. and Hertzog, M. "The effect of language level and visual display on learning captioned instruction", Educational Communication and Technology (29), 1981, 147-154. Click here to access an online copy of article.

    • Mandler, M. B. and BOWKER, D. O. "Fields flickering at different rates can appear identical", Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1981, Sarasota, Florida. Abstract in Investigative Ophthalmology and Visual Science (Suppl.), 1981, 49.

    • Kintz, R. T. and BOWKER, D. O. "Accommodation response during a prolonged visual search task", Applied Ergonomics (13), 1982, 55-59. Click here to access an online copy of the article.

    • BOWKER, D. O. "Audio-range frequency-counter subroutine for the APPLE II", Behavior Research Methods and Instrumentation (14), 1982, 367-368. Click here to access an online copy of the article.

    • BOWKER, D. O. "Perceived flicker rate of suprathreshold stimuli: Influences of spatial frequency content and modulation amplitude", Journal of the Optical Society of America (72), 1982, 1652-1659. Click here to access an online copy of the article.

    • BOWKER, D. O. and Tulunay-Keesey, U. "Sensitivity to countermodulating gratings following spatio-temporal adaptation", Annual Meeting of the Association for Research in Vision and Ophthalmology, May 1982, Sarasota, Florida. Abstract in Investigative Ophthalmology and Visual Science (Suppl.), 1982, 49.

    • BOWKER, D. O. "Perceived flicker rate of countermodulating gratings", Annual Meeting of the Optical Society of America, October 1982, Tuscon, Arizona. Abstract in Journal of the Optical Society of America (72), 1982, 1799.

    • BOWKER, D. O. "Spatio-temporal gain characteristics of the human visual system", Annual Meeting of the Optical Society of America, October 1982, Tuscon, Arizona. Absract in Journal of the Optical Society of America (72), 1982, 1757.

    • BOWKER, D. O. "Suprathreshold spatio-temporal response characteristics of the human visual system", Journal of the Optical Society of America (73), 1983, 436-440. Click here to access an online copy of the article.

    • BOWKER, D. O. and Tulunay-Keesey, U. "Sensitivity to countermodulating gratings following spatio-temporal adaptation", Journal of the Optical Society of America (73), 1983, 427-435. Click here to access an online copy of the article.

    • BOWKER, D. O., Dvorak, C. A. and James, J. H. "Voice quality assessment of ADPCM coders", AT&T Behavioral Sciences Conference, December 1986, Basking Ridge, New Jersey. Article appears in conference proceedings.

    • BOWKER, D. O. and Armitage, C. B. "Performance issues for packetized voice communications", National Communications Forum `87, September 1987, Chicago, Illinois (invited paper). Article appears in Proceedings of the National Communications Forum (41), 1987, 1087-1092.

    • BOWKER, D. O. and Dvorak, C. A. "Speech transmission quality of Wideband Packet Technology", IEEE Global Telecommunications Conference (GLOBECOM), November 1987, Tokyo, Japan. Article appears in GLOBECOM '87 Conference Record (3), 1987, 1887-1889.

    • Karanam, V. R., Sriram, K., and BOWKER, D. O. "Performance evaluation of variable bit rate voice in integrated packet networks", AT&T Technical Journal (67), 1988, 57-71. Click here to access an online copy of article.

    • BOWKER, D. O. "WPT speech performance", AT&T Wideband Packet Technology Seminar, January 1988, Holmdel, New Jersey.

    • BOWKER, D. O. "Cumulation of quantization distortion with multiple encodings for three 16 kbit/s speech coders", AT&T Behavioral Sciences Conference, September 1988, Holmdel, New Jersey. Article appears in conference proceedings.

    • Karanam, V. R., Sriram, K., and BOWKER, D. O. "Performance modeling of variable bit rate voice in integrated packet networks", IEEE Global Telecommunications Conference (GLOBECOM), November 1988, Orlando, Florida. Article appears in GLOBECOM '88 Conference Record (3), 1988, 1617-1622.

    • BOWKER, D. O. and Nguyen, N. T. "Performance characteristics of the Wideband Packet Technology Integrated Access Terminal", ENTELEC '89 Seminar, October 1989, Houston, Texas.

    • Sherif, M. H., BOWKER, D. O., Bertocci, G., Orford, B. A., and Mariano, G. A. "Overview of CCITT Draft Recommendation G.EMB", Proceedings of ICC/SUPERCOMM '90, 1990.

    • Chen, J.-H., Melchner, M. J., Cox, R. V., and BOWKER, D. O., "Real-time implementation and performance of a 16 Kb/s Low-Delay CELP speech coder", IEEE Conference of Acoustics, Speech, and Signal Processing, June 1990. Article appears in Proceedings of ICASSP '90, 1990. Click here to access an online copy of the article.

    • BOWKER, D. O. "Voice quality of connections with and without echo cancellation", AT&T Behavioral Sciences Conference, June 1990, Holmdel, New Jersey. Article appears in conference proceedings.

    • Sriram, K., Mariano, G. A., BOWKER, D. O., and Mac Rae, A. U. "An Integrated Access Terminal for Wideband Packet Networking: Design and Performance Overview", International Switching Symposium, November 1990, Sweden. Article appears in Proceedings of ISS '90, 1990.

    • BOWKER, D. O. "Digital Circuit Multiplication Systems: A telecommunications-related application of Digital Signal Processing", Invited Lecture to Electrical Engineering Department, Howard University, November 1990.

    • BOWKER, D. O. "An overview of two approaches to low rate voice coding: APC and CVSD", Invited Lecture to Electrical Engineering Department, Howard University, April 1991.

    • BOWKER, D. O. and Maxwell, J. H. "The role of behavioral research in the performance engineering of the AT&T Switched Network", AT&T Human Factors and Behavioral Sciences Symposium, Plenary Talk, October 1991. Article appears in symposium proceedings.

    • BOWKER, D. O. and O'Brien, E. "Behavioral Sciences and market place initiatives", AT&T Human Factors Behavioral Sciences Symposium, October 1991. Abstract appears in symposium proceedings.

    • Dvorak, C. A., Rosenbluth, J. H., and BOWKER, D. O. "Evolution of Transmission Rating Models" (Invited Paper), IEEE Global Telecommunications Conference (GLOBECOM), December 1991, Phoenix, Arizona. Article appears in GLOBECOM '91 Conference Record (3), 1991, 1757-1760.

    • Sherif, M. H., BOWKER, D. O., Bertocci, G., Orford, B. A., and Mariano, G. A., "Overview and Performance of CCITT/ANSI Embedded ADPCM Algorithms", IEEE Transactions on Communications (41), 1993, 391-399. Click here to access an online copy of the article.

    • BOWKER, D. O., "Telephone network speech signal enhancement", Journal of the Acoustical Society of America, Vol.95(4), 1994, 2298.

    • BOWKER, D. O. "Voice transmission performance testing of digital network technologies", Chapter in A. K. Syrdal, R. W. Bennett, and S. Greenspan (Eds.), Applied Speech Technology, 1994, CRC Press. Click here to access an online copy of the article.

    • BOWKER, D. O. "Working in an Engineering Project Team", Invited discussion with a group of gifted High School Science students participating in a special course on "Invention and Design" at the University of Virginia, Summer 1994.

    • BOWKER, D. O., "Invention, Design and Development of AT&T TrueVoice", Presentation at the Malcolm Baldridge National Quality Award Opening Ceremonies, Basking Ridge, New Jersey, September 27, 1994.

    • BOWKER, D. O. and J. H. James "Voice quality enhancement to long distance telephony", AT&T Human Factors Behavioral Sciences Symposium, March 1995. Abstract appears in symposium proceedings.

    • J. H. James and BOWKER, D. O. "Wideband telephony: Bandwidth and speech level preferences", AT&T Human Factors Behavioral Sciences Symposium, March 1995. Abstract appears in symposium proceedings.

    • BOWKER, D. O. "Applications of Digital Signal Processing in Telecommunications", Invited Talk to Electrical Engineering Department, Howard University, February 25, 1997.