Free vibrations of ring-and-stringer-stiffened conical shells

Strain-displacement relations are developed for a thin truncated circular conical shell and its reinforcing rings and stringers. Using these relations in an energy approach, methods are developed for determining the resonant frequencies of simply-supported conical shells in unstiffened, ring-stiffened, or ring-and-stringer-stiffened configurations. The stiffeners may be either widely-separated or closely-spaced. Results obtained using these methods are compared with experimental data available in the literature for unstiffened and ring-stiffened shells and data collected at the University of Houston in tests of ring-stiffened and ring-and-stringer-stiffened conical shells.Mechanical Engineering, Department o

Crop insurance as a form of disaster relief: an analysis of the alternatives

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Includes bibliographical references.Not availabl

Quality, palatability and biochemistry of porcine carcasses as affected by electrical stimulation and chilling

Typescript (photocopy).A three-part study consisting of pork carcasses electrically stimulated (ES) or not electrically stimulated (NES) and chilled by three methods was undertaken to establish treatment effects on pork quality, palatability and biochemistry. ES consisted of 17 impulses of 1 sec on, 1 sec off at 500 volts and 60 Hz (approximately 2.5 amperes). Chilling methods consisted of (a) blast chill (BLAST), 3 hr at -34 C followed by 21 hr at 2 C, (b) conventional chill (CONV), 24 hr at 2 C, or (c) brine chill (BRINE), 3 hr under a -5 C brine shower followed by 21 hr at 2 C. In Experiment 1, twenty hogs were slaughtered and intact carcasses or sides were either ES or NES at postmortem intervals of 5 min (intact), 15 min (intact), or 35 min (sides); sides from these hogs were assigned to either BLAST or CONV chilling. Muscle color and firmness scores of carcasses ES at 5 or 15 min postmortem were less desirable (more pale color, less firm) than NES or ES sides at 35 min postmortem; differences were more evident at 8 and 11 hr post-stimulation than at 21 hr post-stimulation. Chilling method and ES or NES did not affect longissimus muscle palatability. In Experiment 2, thirty hogs were slaughtered, left sides ES (at 35 min postmortem) and right sides NES. At 60 min postmortem, sides were assigned to BLAST, CONV or BRINE chilling. Leg or loin temperatures were not different at 0, 1, 3, 6, 12 or 24 hr post-stimulation. ES of sides lowered quality scores for leg muscle color, firmness and separation, whereas shoulder and loin quality were not affected by ES. BLAST chilling produced firmer muscles with less separation than CONV or BRINE chilling. BRINE chilling lowered tenderness scores and increased shear force of longissimus muscle when compared to CONV or BLAST chilling and when sides were NES. When sides were ES, BRINE chilling increased tenderness scores and lowered shear force values when compared to CONV or BLAST chilling. Palatability, yield and color retention of cured hams were not affected by ES or by method of chilling. In Experiment 3, fifteen hogs were slaughtered; left sides were ES (35 min postmortem) and right sides were NES. Paired sides were assigned to BLAST, CONV or BRINE chilling. No differences in pH, ATP or CP levels existed between ES and NES sides at 0, 1 or 3 hr post-stimulation; pH and ATP levels were not different at 6, 12 or 24 hr post-stimulation. Hams from NES sides and BRINE or CONV chilling treatments retained a higher percentage of pumped weight than hams from ES sides but yield after cooking/smoking of ES/BRINE chilled hams was greater than for NES/BRINE chilled hams. Palatability of ham slices was not affected by ES or by method of chilling

A comparison of the self-concept and body-cathexis of selected high school students of high and low cardiovascular fitness

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Not availabl

The use of nonmuscle proteins as binders in various meat systems

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Bibliography: leaves 39-43.Not availabl

Comparing surge and continuous irrigation alternatives using a kinematic wave model

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Bibliography: leaves 144-149.Not availabl

Simulation with minimum equipment of random vibration induced by complex excitation

Complete simulation of random response induced in service by complex, ergodic, Gaussian excitation requires the exact reproduction of the response spectral densities at all points of the system and the cross-spectral densities between each pair of points. This in turn requires exact reproduction of the service loading. If a less-than-complete exact simulation of the response spectra at and between n system locations is acceptable, this can be accomplished using n discrete random forces. For certain types of systems previous theorization has shown that one discrete random force can be used to produce simulation which is accurate in the neighborhood of the resonance frequencies and approximate in the vicinity between resonance peaks. These systems must have light damping and widely spaced resonances so that modal coupling does not exist. The discrete random simulation force must have the appropriately shaped spectrum and must be properly located so that all modes will be excited. For systems of this type the theory shows that reproduction of the response spectral density at any one point assures reproduction of the spectral and cross-spectral densities at and between all other points. In order to assess the practicability of using one electromechanical shaker to simulate random structural vibration which had been induced by complex excitation environments, an experimental study was conducted on two, lightly damped, far-coupled structures having widely separated resonances in their lower frequency range, i.e., a cantilever beam and a simply-supported rectangular plate. The complex, random excitation environment was provided for the beam by two mechanical shakers and for the plate by acoustic noise. One properly located shaker, providing an appropriately shaped input force spectrum, was used to reproduce practicably the narrow-band response spectra and cross-spectra for two measurement locations on each structure. Comparisons made between experimentally and theoretically determined frequency response functions show exceptional agreement. The effects of attaching shakers directly to the structures are discussed. From the results it is concluded that reproduction of the response spectral density at any one point on structures of this type assures reproduction with the same degree of accuracy of the spectra at all other points and the cross-spectra between points.Mechanical Engineering, Department o

ENTERPRISE FLIGHT DATA MANAGEMENT SYSTEM (EFDMS) AND STORAGE INFRASTRUCTURE TECHNOLOGY DISCUSSION

International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, CaliforniaThis paper presents efforts in developing a data management system and storage infrastructure for assisting test engineers in achieving information superiority and maintaining vital up-to-date information. The focus of this Paper is to generate support for a technology refresh, upgrading the major data centers that share in the responsibility of processing telemetry information. We illustrate how our efforts fit into this goal and provide an overview of our concept for a revolutionary transformation in data management systems. We present the significance of this new technology and suggest a path to implementing the solution.International Foundation for TelemeteringProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection