TY - CONF
TI - Relationship between short fiber content and the HVI length parameters
AU - Batra, S.K.
AU - Zeidman, M.I.
AU - Sasser, P.E.
C2 - 1989///
C3 - 1989 proceedings : Beltwide Cotton Production Research Conferences, January 2-7, 1989, Nashville, Tennessee
DA - 1989///
SP - 605-610
PB - Memphis, Tenn.: Published by National Cotton Council of American in cooperation with the Cotton Foundation
ER -
TY - CONF
TI - Making quality happen: What works, what doesn't
AU - Godfrey, A.B.
C2 - 1989///
C3 - Proceedings, 33rd EOQC Annual Conference, 18-21 September 1989, Vienna, Austria
DA - 1989///
PB - Vienna : Osterreichische Vereinigung fu?r Qualita?tssichterung
ER -
TY - PAT
TI - Protective clothing system for cold weather
AU - Seyam, A.
C2 - 1989///
DA - 1989///
PY - 1989///
ER -
TY - JOUR
TI - Retail buyers' salability judgments: A comparison of merchandise categories
AU - Stone, L.
T2 - Clothing and Textiles Research Journal
DA - 1989///
PY - 1989///
VL - 8
SP - 56-61
ER -
TY - JOUR
TI - SOURCE CORRELATION-EFFECTS ON THE SOUND POWER RADIATION FROM SPHERICAL-SHELLS
AU - PENG, H
AU - BANKSLEE, P
T2 - JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
AB - The sound power radiated from a fluid-loaded thin spherical shell under the action of correlated axisymmetric annular forces is formulated in this study. By assuming that two forces possess identical bandlimited white-noise spectra, uniformly distributed against the equator of the spherical shell, numerical evaluations of the nondimensional sound power are performed for a steel shell immersed in air and water, respectively. The results show that (1) keeping the input power the same, point forces always produce higher sound power levels than distributed forces; (2) when the band of excitation falls into a relatively low frequency region where only very few, if any, shell modes can be excited, the cross spectra between forces generally have important effects on the radiated sound power level; (3) when the band covers a relatively wide frequency range where more shell modes can be excited, the role of source correlations becomes important only if the two forces are located close to one another; (4) when two forces are positively correlated (r=+1), there always exists an optimal separation distance (expressed as angle Θ1) between the two forces that will produce a relatively minimum sound power level. This phenomenon of sound power reduction is discussed by means of sound power spectrum analysis. These conclusions are applicable for spherical shells immersed in air and in water.
DA - 1989/10//
PY - 1989/10//
DO - 10.1121/1.398718
VL - 86
IS - 4
SP - 1586-1594
SN - 0001-4966
ER -
TY - PCOMM
TI - LENGTH ERROR ANALYSIS FOR IMPEDANCE TUBE MEASUREMENTS
AU - BANKSLEE, P
AU - PENG, H
AB - Length error analysis of the transfer function method and improved standing wave ratio (SWR) method for impedance tube measurements is presented in this letter. The error of measuring the complex reflection coefficients R is caused by errors in measuring the positions of the two microphones (or the two pressure points for the improved SWR method). Results agree with Abom and Boden’s [J. Acoust. Soc. Am. 83, 2429–2438 (1988)] conclusions, i.e., errors will be large if s, the separation distance of the two microphones, is about one-half wavelength and will be small if s is about one-quarter wavelength. Results also show that in order to reduce the amplitude error of R, it is better to locate one microphone near a minimum pressure point and the other near the adjacent maximum pressure point. To reduce the phase error of R for the transfer function method, preference of the two microphone locations depends on the combination of length errors Δl1 and Δl2. Phase error reduction for the improved SWR method requires an accurate measurement of the minimum pressure point.
DA - 1989/4//
PY - 1989/4//
DO - 10.1121/1.397967
SP - 1769-1772
ER -
TY - JOUR
TI - AN INTEGRATED APPROACH TO DYNAMIC ANALYSIS OF THE RING SPINNING PROCESS .2. WITH AIR DRAG
AU - BATRA, SK
AU - GHOSH, TK
AU - ZEIDMAN, MI
T2 - TEXTILE RESEARCH JOURNAL
AB - The dynamics of the ring spinning process has been re-analyzed as a coupled set of subproblems; the solutions are obtained numerically. The analyses in Part I and II of this series deal with the case of an uncontrolled balloon. In Part I the effects of air drag as well as gravitational and Coriolis accelerations are ignored. In Part II the effects of air drag are included. These analyses differ from the earlier ones in their choice of the relevant boundary conditions; the ones used here are presumed more realistic. Shapes of the spinning balloons are derived from the conditions of dynamic equilibrium of the yam, from pig-tail to wind-point, as well as that of the traveler. Non-dimen sionalization of the problem, is based on two physical lengths, which allows easy comparison of the balloon shapes for widely different dynamic conditions (including collapsed balloons) on the same plot. Tension distributions along the yarn path can be predicted. Similarly, mass of the traveler required for a specified yam tension at the pig-tail can be calculated. Air drag is found to be particularly useful in controlling the shape and size of the balloon. The numerical solution procedures developed can be used to explore the regions of instability of the balloon.
DA - 1989/7//
PY - 1989/7//
DO - 10.1177/004051758905900707
VL - 59
IS - 7
SP - 416-424
SN - 0040-5175
ER -
TY - JOUR
TI - AN INTEGRATED APPROACH TO DYNAMIC ANALYSIS OF THE RING SPINNING PROCESS .1. WITHOUT AIR DRAG AND CORIOLIS ACCELERATION
AU - BATRA, SK
AU - GHOSH, TK
AU - ZEIDMAN, MI
T2 - TEXTILE RESEARCH JOURNAL
AB - We have re-analyzed the dynamics of the ring spinning process as a coupled set of subproblems and have obtained the solutions numerically. The analyses in Parts I and II of this series deal with the case of an uncontrolled balloon. In Part I we ignore the effects of air drag as well as gravitational and Coriolis accelerations. In Part II we include the effects of air drag. These analyses differ from the earlier ones in their choice of the relevant boundary conditions; those used here we presume are more realistic. The shapes of the spinning balloons are derived from the conditions of dynamic equi librium of the yam, from pigtail to wind-point, as well as that of the traveler. Non dimensionalization of the problem is based on two physical lengths, allowing easy comparison of the balloon shapes for widely different dynamic conditions (including collapsed balloons) on the same plot. Tension distributions along the yarn path can be predicted. Similarly, the mass of the traveler required for a specified yarn tension at the pigtail can be calculated. Air drag is particularly useful in controlling the shape and size of the balloon. The numerical solution procedures we have developed can be used to explore the regions of instability of the balloon.
DA - 1989/6//
PY - 1989/6//
DO - 10.1177/004051758905900601
VL - 59
IS - 6
SP - 309-317
SN - 0040-5175
ER -
TY - PAT
TI - Sewing machine having sewing forces measurement system
AU - Little, T. J.
AU - Matthews, B. A.
C2 - 1989///
DA - 1989///
PY - 1989///
ER -