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California Polytechnic State University, San Luis Obispo

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Calcium Buffering Is Required To Maintain Bone Stiffness In Saline Solution, M. B. Gustafson, R. B. Martin, V. Gibson, D. H. Storms, S. M. Stover, J. Gibeling, L. Griffin Sep 1996

Calcium Buffering Is Required To Maintain Bone Stiffness In Saline Solution, M. B. Gustafson, R. B. Martin, V. Gibson, D. H. Storms, S. M. Stover, J. Gibeling, L. Griffin

Biomedical Engineering

This work determined whether mineral dissolution due to prolonged testing or storage of bone s~'imens in normal salint: would alter Lheir elastic modulus. In one experiment, small pieces of equine third metacarpal bone were soaked in normal saline supplemented with varying amounts of CaCI1. Changing Ca ion concentrations in the bath were monitored and the equilibrium concentration was determined. In a second experiment, the elastic moduli of twenty 4 x 10 x 100 mm equine third metacarpal beams were determined non-destructively in four-point bending. Half the beams were then soaked for 10 days in normal saline, and the other half …

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In Vitro Fatigue Behavior Of The Equine Third Metacarpus: Remodeling And Microcrack Damage Analysis, R.B. Martin, V.A. Gibson, S.M. Stover, J.C. Gibeling, L.V. Griffin Sep 1996

In Vitro Fatigue Behavior Of The Equine Third Metacarpus: Remodeling And Microcrack Damage Analysis, R.B. Martin, V.A. Gibson, S.M. Stover, J.C. Gibeling, L.V. Griffin

Biomedical Engineering

We studied remodeling and microcrack damage in specimens of Thoroughbred racehorse third metacarpal bone that had been subjected to monotonic or fatigue failure. We asked three questions. What effects does mechanical loading have on histologically observable microcrack damage? Are there regional variations in remodeling of the equine cannon bone, and do these variations correlate with mechanical properties? To what extent are remodeling and microcrack damage age-dependent? Machined beams from the medial, lateral, and dorsal cortices were loaded to fracture in four-point bending monotonically, or cyclically at a load initially producing 10,000 microstrain. Specimens were then bulk-stained in basic fuchsin, and …

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Review Of Dark Sun: The Making Of The Hydrogen Bomb By Richard Rhodes, David W. Hafemeister Sep 1996

Review Of Dark Sun: The Making Of The Hydrogen Bomb By Richard Rhodes, David W. Hafemeister

Physics

No abstract provided.

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August 30, 1996 Cal Poly Report, Public Affairs Office Aug 1996

August 30, 1996 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

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Real-Time Range Image Segmentation Using Adaptive Kernels And Kalman Filtering, Fred W. Depiero, Mohan M. Trivedi Aug 1996

Real-Time Range Image Segmentation Using Adaptive Kernels And Kalman Filtering, Fred W. Depiero, Mohan M. Trivedi

Electrical Engineering

Segmentation is a fundamental process affecting the overall quality and utility of a machine vision system. Range Profile Tracking (RPT) is a systematic approach for stable, accurate and high speed segmentation of range images that is based on Kalman filtering. Tests of RPT have produced stable decompositions of second order surfaces bounded by jump and crease discontinuities, having a volumetric error of a few percent, in under 6 sec. for a wide variety of conditions. Results from over 900 tests on synthetic scenes and 150 real range images are presented.

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Summer Mustang, August 22, 1996 Aug 1996

Summer Mustang, August 22, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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Simple Rail-To-Rail Constant-Transconductance Input Stage Operating In Strong Inversion, Vladimir I. Prodanov, Michael M. Green Aug 1996

Simple Rail-To-Rail Constant-Transconductance Input Stage Operating In Strong Inversion, Vladimir I. Prodanov, Michael M. Green

Electrical Engineering

A CMOS op-amp input and gain stage suitable for low voltage operation are introduced. The input stage operates in strong inversion and has common-mode range beyond rail-to-rail. It uses two complementary differential pairs connected in parallel. The common-mode dependent current biasing employs only four transistors, does not require additional voltage references, current switches and/or current mirrors and does not increase the minimum required supply voltage. The variation of the net transconductance is approximately 15% over the entire common-mode range. The gain-stage has constant output resistance. In addition it reduces the variation of the net transconductance due to variations in μn/μp …

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August 16, 1996 Cal Poly Report, Public Affairs Office Aug 1996

August 16, 1996 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

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Strongly-Consistent, Distribution-Free Confidence Intervals For Quantiles, David Gilat, Theodore P. Hill Aug 1996

Strongly-Consistent, Distribution-Free Confidence Intervals For Quantiles, David Gilat, Theodore P. Hill

Research Scholars in Residence

Strongly-consistent, distribution-free confidence intervals are derived to estimate the fixed quantiles of an arbitrary unknown distribution, based on order statistics of an iid sequence from that distribution. This new method, unlike classical estimates, works for totally arbitrary (including discontinuous) distributions, and is based on recent one-sided strong laws of large numbers.

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Magnetic Properties Of Tunicate Blood Cells. Ii. Ascidia Ceratodes, Kenneth Kustin, William E. Robinson, Richard B. Frankel, K. Spartalian Aug 1996

Magnetic Properties Of Tunicate Blood Cells. Ii. Ascidia Ceratodes, Kenneth Kustin, William E. Robinson, Richard B. Frankel, K. Spartalian

Physics

The magnetic properties of intact blood cells of the tunicate Ascidia ceratodes have been measured up to 50 kOe with a SQUID susceptometer. Analysis of total metal contents by plasma emission spectroscopy and V(IV) content by epr indicates that approximately 5% of the accumulated vanadium is +4 vanadyl ion. Measured values of the magnetic moment MP at different values of the applied magnetic field H over the temperature range T = 2–100 K depend on the magnitude of the field indicating magnetic anisotropy of the ground state. The slope of the MP vs. H/T curve at …

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Summer Mustang, August 14, 1996 Aug 1996

Summer Mustang, August 14, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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Koala: An Object-Agent Design System, Kym J. Pohl, Jens G. Pohl Aug 1996

Koala: An Object-Agent Design System, Kym J. Pohl, Jens G. Pohl

Collaborative Agent Design (CAD) Research Center

This paper describes KOALA, a design system with primary focus on the predesign stage of architectural design. KOALA combines object-agent technology with high level representation to form a partnership between the human designer and the computer-based design environment. A diverse taxonomy of agents including Domain agents. Space agents, and Monitor agents work in a collaborative fashion to provide the human designer with expert evaluation and assistance in developing a design solution. Spaces, in their roles as agents attempt to formulate various design solutions based on individual perspectives through negotiation with other agents. The result is a highly interactive design environment …

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Executive Committee - Meeting Minutes, 8/13/1996, Academic Senate Aug 1996

Executive Committee - Meeting Minutes, 8/13/1996, Academic Senate

Academic Senate Minutes

No abstract provided.

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Executive Committee - Agenda, 8/13/1996, Academic Senate Aug 1996

Executive Committee - Agenda, 8/13/1996, Academic Senate

Academic Senate Agendas

No abstract provided.

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Summer Mustang, August 8, 1996 Aug 1996

Summer Mustang, August 8, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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August 2, 1996 Cal Poly Report, Public Affairs Office Aug 1996

August 2, 1996 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

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Summer Mustang, August 1, 1996 Aug 1996

Summer Mustang, August 1, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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Osteonal Structure In The Equine Third Metacarpus, R. B. Martin, V. A. Gibson, S. M. Stover, J. C. Gibeling, L. V. Griffin Aug 1996

Osteonal Structure In The Equine Third Metacarpus, R. B. Martin, V. A. Gibson, S. M. Stover, J. C. Gibeling, L. V. Griffin

Biomedical Engineering

In studying the flexural fatigue properties of the equine third metacarpal (cannon) bone, we previously found that the dorsal region was weaker monotonically, but more fatigue resistant, than the lateral region. Fatigue resistance was associated with fracture surfaces which demonstrated that secondary osteons had “pulled out” of the surrounding matrix; this never happened in lateral specimens. We therefore became interested in the osteonal structure of this bone, and began to study its birefringence patterns in circularly polarized light. We found that the predominant type of secondary osteon was one in which only the outermost few lamellae were circumferential, with the …

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Resource Letter Belfef-1: Biological Effects Of Low-Frequency Electromagnetic Fields, David W. Hafemeister Aug 1996

Resource Letter Belfef-1: Biological Effects Of Low-Frequency Electromagnetic Fields, David W. Hafemeister

Physics

This Resource Letter provides a guide to the literature on the interaction of extremely low-frequency electromagnetic field (ELF/EMF) interactions with biological matter, and on the possibility that such interactions could have a harmful effect on human health. Journal articles and books are cited for the following topics: ELF/EMF theoretical interactions with biological cells, organs and organisms, magnetic dipole interactions, sensing by animals, biomedical–biophysical experiments, epidemiology, and litigation–mitigation risk issues.

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Summer Mustang, July 25, 1996 Jul 1996

Summer Mustang, July 25, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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July 19, 1996 Cal Poly Report, Public Affairs Office Jul 1996

July 19, 1996 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

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Summer Mustang, July 18, 1996 Jul 1996

Summer Mustang, July 18, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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Executive Committee - Meeting Minutes, 7/16/1996, Academic Senate Jul 1996

Executive Committee - Meeting Minutes, 7/16/1996, Academic Senate

Academic Senate Minutes

No abstract provided.

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Executive Committee - Agenda, 7/16/1996, Academic Senate Jul 1996

Executive Committee - Agenda, 7/16/1996, Academic Senate

Academic Senate Agendas

No abstract provided.

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Solute Nucleation And Growth In Supercritical Fluid Mixtures, Gregory T. Smedley, Gerald Wilemski, W. Terry Rawlins, David B. Oakes, Prakash Joshi, William W. Durgin Jul 1996

Solute Nucleation And Growth In Supercritical Fluid Mixtures, Gregory T. Smedley, Gerald Wilemski, W. Terry Rawlins, David B. Oakes, Prakash Joshi, William W. Durgin

Office of the Provost Scholarship

This research effort is directed toward two primary scientific objectives: (1) to determine the gravitational effect on the measurement of nucleation and growth rates near a critical point and (2) to investigate the nucleation process in supercritical fluids to aid in the evaluation and development of existing theoretical models and practical applications. A nucleation pulse method will be employed for this investigation using a rapid expansion to a supersaturated state that is maintained for ≈ 1 ms followed by a rapid recompression to a less supersaturated state that effectively terminates nucleation while permitting growth to continue. Nucleation, which occurs during …

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Summer Mustang, July 11, 1996 Jul 1996

Summer Mustang, July 11, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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July 5, 1996 Cal Poly Report, Public Affairs Office Jul 1996

July 5, 1996 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.

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Summer Mustang, July 3, 1996 Jul 1996

Summer Mustang, July 3, 1996

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

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Expression Of A Bovine Κ-Cn Cdna In The Mammary Gland Of Transgenic Mice Utilizing A Genomic Milk Protein Gene As An Expression Cassette, Alfonso Gutiérrez, Harry M. Meade, Paul Ditullio, Daniel Pollock, Merry Harvey, Rafael Jiménez-Flores, Gary B. Anderson, James D. Murray, Juan F. Medrano Jul 1996

Expression Of A Bovine Κ-Cn Cdna In The Mammary Gland Of Transgenic Mice Utilizing A Genomic Milk Protein Gene As An Expression Cassette, Alfonso Gutiérrez, Harry M. Meade, Paul Ditullio, Daniel Pollock, Merry Harvey, Rafael Jiménez-Flores, Gary B. Anderson, James D. Murray, Juan F. Medrano

Dairy Science

Transgenic mice were produced by microinjection of a DNA construct composed of the bovine κ-casein (κ-CN) cDNA under the control of the goat β-CN 5' promoter elements and 3' flanking regions into pronuclear-stage embryos. The gene construct targeted the expression of bovine κ-CN RNA to the mammary gland and secretion of bovine κ-CN in the milk. In the three lines studied (BC-7, BC-31 and BC-67) the transgene was stably integrated and propagated as a Mendelian locus. Expression of the bovine protein in lactating mice from the three transgenic lines was demonstrated by northern and western blots. In ten different tissues …

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Immunization Against Growth Hormone Releasing Factor Or Chronic Feed Restriction Initiated At 3.5 Months Of Age Reduces Ovarian Response To Pulsatile Administration Of Gonadotropin-Releasing Hormone At 6 Months Of Age And Delays Onset Of Puberty In Heifers, P. D. Schoppee, Jeffrey D. Armstrong, R. W. Harvey, M. D. Whitacre, A. Felix, R. M. Campbell Jul 1996

Immunization Against Growth Hormone Releasing Factor Or Chronic Feed Restriction Initiated At 3.5 Months Of Age Reduces Ovarian Response To Pulsatile Administration Of Gonadotropin-Releasing Hormone At 6 Months Of Age And Delays Onset Of Puberty In Heifers, P. D. Schoppee, Jeffrey D. Armstrong, R. W. Harvey, M. D. Whitacre, A. Felix, R. M. Campbell

Office of the President Scholarship

A severe or moderate suppression of serum insulin-like growth factor I (IGF-I) was induced in heifers, beginning at 104 days of age, by active immunization against growth hormone-releasing factor (GRFi) or by chronic feed restriction (RES), respectively. We hypothesized that reduced serum IGF-I results in decreased serum estradiol-17 beta (E2), which in turn delays onset of puberty. The objectives of this experiment were to determine 1) whether GRFi and RES would alter follicular development and delay onset of puberty through similar mechanisms, and 2) whether GnRH would enhance follicular growth in control, GRFi, and RES heifers at 6 mo of …

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