TY - CHAP TI - Improving the bond strength of Spectra 900 and Spectra 1000 high strength polyethylene fibers by chemical etching AU - Pourdeyhimi, B. AU - Ulcay, Y. AU - Block, I. T2 - Composite material technology, 1990: presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition, New Orleans, Louisiana, January 14-18, 1990 A2 - D. Hui, A2 - Kozik, T.J. PY - 1990/// SP - 23-27 PB - New York, N.Y.: American Society of Mechanical Engineers SN - 9780791804568 ER - TY - CHAP TI - Elastic properties of acrylic bone cements reinforced with ultra high strength polyethylene fibers: The effect of bond strength AU - Pourdeyhimi, B. AU - Ulcay, Y. AU - Wagner, H.D. T2 - Composite material technology, 1990: presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition, New Orleans, Louisiana, January 14-18, 1990 A2 - D. Hui, A2 - Kozik, T.J. PY - 1990/// SP - 131-137 PB - New York, N.Y.: American Society of Mechanical Engineers SN - 9780791804568 ER - TY - JOUR TI - INSTRUMENTAL TECHNIQUES TO QUANTIFY TEXTURAL AND APPEARANCE CHANGES IN CARPET .3. COLORIMETRIC IMAGE-ANALYSIS AU - WU, Y AU - POURDEYHIMI, B AU - SPIVAK, SM AU - HOLLIES, NRS T2 - TEXTILE RESEARCH JOURNAL AB - Our research emphasis has been on identifying several key features of carpet quality combining both objective (instrumental) and subjective (human perception, HPA) approaches. Previously, HPA was used to determine a set of user terms and descriptions for assessing carpet quality features such as tuft geometry, luster, soiling, and overall appearance. The work reported here expands on the development of objective or instrumental methods for quantifying user perception of carpet appearance. A cus tomized, personal computer-based image analysis system, using an AT&T image cap ture board, has been developed. This new endeavor permits moderate resolution video capture of color images, with digital storage, retrieval, measurement, analysis, and enhancement. Special programming and illumination specifically designed for carpet surface analyses as well as carpet fiber-yarn properties are underway. The work reported here includes measurement of yam bundle or tuft size distribution through a regime of image enhancement, binary conversion, edge detection, and area measurement. Data are presented on various worn and unworn polyester Saxony tufted carpets using these techniques. Major new findings demonstrate the importance of color (RGB) imaging or colorimetric image analysis, in addition to gray level image processing, for determining appearance changes in carpet. DA - 1990/11// PY - 1990/11// DO - 10.1177/004051759006001108 VL - 60 IS - 11 SP - 673-687 SN - 0040-5175 ER - TY - JOUR TI - A STUDY OF THE INFLUENCE OF MANUFACTURING TECHNIQUES ON THE MECHANICAL-PROPERTIES OF DACRON FIBERS EMPLOYED IN VASCULAR GRAFTS AU - FELDSTEIN, M AU - POURDEYHIMI, B T2 - JOURNAL OF MATERIALS SCIENCE LETTERS DA - 1990/9// PY - 1990/9// DO - 10.1007/BF00727877 VL - 9 IS - 9 SP - 1061-1065 SN - 0261-8028 ER -