The analysis of nonstationary vibration data

The general methodology for the analysis of arbitrary nonstationary random data is reviewed. A specific parametric model, called the product model, that has applications to space vehicle launch vibration data analysis is discussed. Illustrations are given using the nonstationary launch vibration data measured on the Space Shuttle orbiter vehicle

Optimum data analysis procedures for Titan 4 and Space Shuttle payload acoustic measurements during lift-off

Analytical expressions have been derived to describe the mean square error in the estimation of the maximum rms value computed from a step-wise (or running) time average of a nonstationary random signal. These analytical expressions have been applied to the problem of selecting the optimum averaging times that will minimize the total mean square errors in estimates of the maximum sound pressure levels measured inside the Titan IV payload fairing (PLF) and the Space Shuttle payload bay (PLB) during lift-off. Based on evaluations of typical Titan IV and Space Shuttle launch data, it has been determined that the optimum averaging times for computing the maximum levels are (1) T (sub o) = 1.14 sec for the maximum overall level, and T(sub oi) = 4.88 f (sub i) (exp -0.2) sec for the maximum 1/3 octave band levels inside the Titan IV PLF, and (2) T (sub o) = 1.65 sec for the maximum overall level, and T (sub oi) = 7.10 f (sub i) (exp -0.2) sec for the maximum 1/3 octave band levels inside the Space Shuttle PLB, where f (sub i) is the 1/3 octave band center frequency. However, the results for both vehicles indicate that the total rms error in the maximum level estimates will be within 25 percent the minimum error for all averaging times within plus or minus 50 percent of the optimum averaging time, so a precise selection of the exact optimum averaging time is not critical. Based on these results, linear averaging times (T) are recommended for computing the maximum sound pressure level during lift-off

Investigation of statistical techniques to select optimal test levels for spacecraft vibration tests Final report, 1 Nov. 1969 - 31 Oct. 1970

Statistical techniques for selecting optimal test levels for vibration tests of spacecraft hardwar

A method for predicting launch vehicle vibration levels in the region of the spacecraft adaptor

Prediction curves for launch vehicle vibration levels in region of spacecraft adapto

Nurses Alumni Association Bulletin, Fall 1999

1999-2000 Meeting Dates Calendar 2000 Annual Luncheon-Meeting Notice Fall Social Officers and Committee Chairs Bulletin Publication Committee The President\u27s Message Treasurer\u27s Report News About Our Graduates History of The Nurses Relief Fund Nurses Wear White Memories of My Nurse Training Days Scholarship Funds At Work Second Janet C. Hindson Award Rib Ticklers Happy Birthday Fiftieth Anniversary Resume Alumni Association Meetings Alumni Office News Committee Reports Bulletin Nominating Relief Fund Scholarship Social Development Luncheon Photos In Memoriam, Names of Deceased Graduates Class News Janet C. Hindson Memorial Award (How to Submit Names) Scholarship Fund Application Certification Reimbursement Application Relief Fund Application Pins, Transcripts, Class Address List, Change of Address Forms Campus Ma

An evaluation of Space Shuttle STS-1 payload bay acoustic data and comparison with predictions

During the first launch (STS-1) of the Space Shuttle orbiter vehicle, sound pressure levels were measured at several locations in the payload bay of the vehicle and on the exterior surface. The data were obtained in order to provide validation for prediction procedures for interior and exterior sound pressure levels and to determine, independently, the acoustic environment in the payload bay during actual launch conditions

Effect of ethylene on carnation growth

June 1974.Covers not scanned.Includes bibliographical references.Carnation flowers are susceptible to damage when exposed to rather low ethylene dosages. This research confirmed that ethylene also affects the growth of the carnation plant. Severe growth reduction occurred when plants were treated continuously with 100 ppb, 300 ppb, and 500 ppb C2H4. Plants treated with the same concentrations for shorter periods showed less damage. Ethylene treatment at different growth stages produced varying plant responses. Plants treated during rapid growth stages (e.g. "rapid elongation" and "bud initiation") were more susceptible to ethylene than were plants treated at stages of relatively less rapid growth (e.g. after pinching and after planting). It was suggested that low ethylene levels for prolonged periods could result in serious growth reduction. Ethylene levels in most urban areas are high enough to warrant concern by growers in such areas. Ambient ethylene levels in the Denver Metropolitan area may cause more stem shortening than was previously thought. A grower should consider ambient C2H4 levels before locating his range in an urban area

Nurses Alumni Association Bulletin, Fall 1998

1998-1999 Meeting Date Calendar 1999 Annual Luncheon & Meeting Notice Fall Social Officers and Committee Chairs Bulletin Publication Committee The President\u27s Message Treasurer\u27s Report News About Our Graduates Highlight Of 1998 Operation Smile Scholarship Funds At Work Romania Trip Double Honors Doris Bowman Memorial Service For Janet Hindson A time for everything On the Lighter Side Twenty Ways to Kill an Organization Happy Birthday Fiftieth Anniversary Resume Alumni Association Meetings Alumni Office News Committee Reports Bulletin By-Laws Relief Fund Social Scholarship Development Nominating Luncheon Photos In Memoriam, Names of Deceased Graduates Class News Certification Reimbursement Application Relief Fund Application Scholarship Fund Application (new) Pins, Transcripts, Class Address List, Change of Address Forms Campus Ma