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California Polytechnic State University, San Luis Obispo

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Application Of A Fiber-Reinforced Continuum Theory To Multiple Deformations Of The Annulus Fibrosus, Stephen M. Klisch, Jeffrey C. Lotz Oct 1999

Application Of A Fiber-Reinforced Continuum Theory To Multiple Deformations Of The Annulus Fibrosus, Stephen M. Klisch, Jeffrey C. Lotz

Mechanical Engineering

Accurate tissue stress predictions for the annulus fibrosus are essential for understanding the factors that cause or contribute to disc degeneration and mechanical failure. Current computational models used to predict in vivo disc stresses utilize material laws for annular tissue that are not rigorously validated against experimental data. Consequently, predictions of disc stress resulting from physical activities may be inaccurate and therefore unreliable as a basis for defining mechanical–biologic injury criteria. To address this need we present a model for the annulus as an isotropic ground substance reinforced with two families of collagen fibers, and an approach for determining the …


Fall 1999 Polyview, Office Of Institutional Planning & Analysis Oct 1999

Fall 1999 Polyview, Office Of Institutional Planning & Analysis

Office of Institutional Research

The PolyView is a short publication containing enrollment, graduation, and student demographic data that is published after fall quarter classes.


Editor's Notes Oct 1999

Editor's Notes

Cal Poly Magazine

No abstract provided.


From Our Readers Oct 1999

From Our Readers

Cal Poly Magazine

No abstract provided.


Contents Oct 1999

Contents

Cal Poly Magazine

No abstract provided.


Editorial Board Oct 1999

Editorial Board

Cal Poly Magazine

No abstract provided.


Cal Poly Computer Programmers Take On The World, Bob Anderson Oct 1999

Cal Poly Computer Programmers Take On The World, Bob Anderson

Cal Poly Magazine

No abstract provided.


Advancement Oct 1999

Advancement

Cal Poly Magazine

No abstract provided.


University News Oct 1999

University News

Cal Poly Magazine

No abstract provided.


Alumni News Oct 1999

Alumni News

Cal Poly Magazine

No abstract provided.


Class Notes Oct 1999

Class Notes

Cal Poly Magazine

No abstract provided.


Back Cover Oct 1999

Back Cover

Cal Poly Magazine

No abstract provided.


Bacterial Magnetosomes: Microbiology, Biomineralization And Biotechnological Applications, Dirk Schlϋer, Richard B. Frankel Oct 1999

Bacterial Magnetosomes: Microbiology, Biomineralization And Biotechnological Applications, Dirk Schlϋer, Richard B. Frankel

Physics

Magnetotactic bacteria orient and migrate along geomagnetic field lines. This ability is based on intracellular magnetic structures, the magnetosomes, which comprise nanometer-sized, membrane-bound crystals of the magnetic iron minerals magnetite (Fe3O4) or greigite (Fe3O4). Magnetosome formation is achieved by a mineralization process with biological control over the accumulation of iron and the deposition of the mineral particle with specific size and orientation within a membrane vesicle at specific locations in the cell. This review focuses on the current knowledge about magnetotactic bacteria and will outline aspects of the physiology and molecular biology …


Mustang Daily, September 30, 1999 Sep 1999

Mustang Daily, September 30, 1999

Cal Poly Student Newspaper

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


September 29, 1999 Cal Poly Report, Public Affairs Office Sep 1999

September 29, 1999 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.


Mustang Daily, September 29, 1999 Sep 1999

Mustang Daily, September 29, 1999

Cal Poly Student Newspaper

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


Mustang Daily, September 28, 1999 Sep 1999

Mustang Daily, September 28, 1999

Cal Poly Student Newspaper

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


Optical Gain Measurements Based On Fundamental Properties And Comparison With Many-Body Theory, T. Keating, S. H. Park, J. Minch, Xiaomin Jin, Shun-Lien Chuang, T. Tanbun-Ek Sep 1999

Optical Gain Measurements Based On Fundamental Properties And Comparison With Many-Body Theory, T. Keating, S. H. Park, J. Minch, Xiaomin Jin, Shun-Lien Chuang, T. Tanbun-Ek

Electrical Engineering

We present high accuracy measurements of gain, loss, and transparency energy in long-wavelength semiconductors based on a hybrid approach using the fundamental relationship between the gain and the spontaneous emission spectra. Independent measurements of optical gain, transparency energy, and loss show the accuracy and validity of this technique. These results are compared with those obtained by the non-Markovian gain model with many-body effects under the spontaneous emission transformation method. It is found that the hybrid approach for the gain spectrum alleviates many of the problems related to the poor signal to noise ratio in the amplified-spontaneous emission near and below …


Discovery Of Design Methodologies, Cirrus Shakeri, David C. Brown, Mohammad N. Noori Sep 1999

Discovery Of Design Methodologies, Cirrus Shakeri, David C. Brown, Mohammad N. Noori

Office of the Dean (CENG) Scholarship

In this paper we present an AI-based approach for the discovery of design methodologies for multi-disciplinary design situations. The approach is based on simulating the design process using a multi-agent system that mimics the behavior of the design team. The system activates the pieces of design knowledge when they become applicable. The use of knowledge by agents is recorded by tracing the steps that the agents have taken during a design project. Many traces are generated by solving a large number of design projects that differ in their requirements. A set of design methodologies is constructed by using clustering techniques …


Mustang Daily, September 27, 1999 Sep 1999

Mustang Daily, September 27, 1999

Cal Poly Student Newspaper

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


Mustang Daily, September 24, 1999 Sep 1999

Mustang Daily, September 24, 1999

Cal Poly Student Newspaper

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


Mustang Daily, September 23, 1999 Sep 1999

Mustang Daily, September 23, 1999

Cal Poly Student Newspaper

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


September 22, 1999 Cal Poly Report, Public Affairs Office Sep 1999

September 22, 1999 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.


Executive Committee - Meeting Minutes, 9/21/1999, Academic Senate Sep 1999

Executive Committee - Meeting Minutes, 9/21/1999, Academic Senate

Academic Senate Minutes

No abstract provided.


Executive Committee - Agenda, 9/21/1999, Academic Senate Sep 1999

Executive Committee - Agenda, 9/21/1999, Academic Senate

Academic Senate Agendas

No abstract provided.


Mustang Daily, Fall 1999 Sep 1999

Mustang Daily, Fall 1999

Cal Poly Student Newspaper

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


September 15, 1999 Cal Poly Report, Public Affairs Office Sep 1999

September 15, 1999 Cal Poly Report, Public Affairs Office

Cal Poly Report

No abstract provided.


Theoretical And Experimental Investigation On The Low Temperature Properties Of The Nbcr2 Laves Phase, Dan J. Thoma, Chu Fuming, Katherine C. Chen, Paul G. Kotula, Terence E. Mitchell, John M. Wills, Alim Ormeci, Shao Ping Chen, Robert C. Albers Sep 1999

Theoretical And Experimental Investigation On The Low Temperature Properties Of The Nbcr2 Laves Phase, Dan J. Thoma, Chu Fuming, Katherine C. Chen, Paul G. Kotula, Terence E. Mitchell, John M. Wills, Alim Ormeci, Shao Ping Chen, Robert C. Albers

Materials Engineering

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The goal of the project was to develop methodologies in which to define and improve the properties of NbCr2 so that the high temperature structural applications of alloys based upon this would not be limited by the low-temperature brittle behavior of the intermetallic. We accomplished this task by (1) understanding the defect structure and deformation mechanisms in Laves phases, (2) electronic and geometric contributions to phase stability and alloying behavior, and (3) novel processing of dual phase (Laves/bcc) …


Valuation Of Tree Aesthetics On Small Urban-Interface Properties, Richard Thompson, Richard Hanna, Jay Noel, Douglas D. Piirto Sep 1999

Valuation Of Tree Aesthetics On Small Urban-Interface Properties, Richard Thompson, Richard Hanna, Jay Noel, Douglas D. Piirto

Natural Resources Management and Environmental Sciences

A model was developed to predict the value contribution of forest condition on small urban-wildland interface properties. Sample data were collected on property transactions in the Lake Tahoe Basin of California between 1990 and 1994. A variant of the stand density index (SDI) and a tree health measure were added to a list of traditional property characteristics (i.e., location, house size, lot size) to express the influence of tree care on property value. These aesthetic characteristics were statistically significant despite the expected dominant influence of the traditional characteristics. Values for the forest density and health characteristics were estimated and reveal …


Mechanical Conditioning Of Tomato Seedlings Improves Transplant Quality Without Deleterious Effects On Field Performance, Lauren C. Garner, Thomas Björkman Sep 1999

Mechanical Conditioning Of Tomato Seedlings Improves Transplant Quality Without Deleterious Effects On Field Performance, Lauren C. Garner, Thomas Björkman

Horticulture and Crop Science

Excessive stem elongation reduces plant survival in the field and hinders mechanical transplanting. Mechanical conditioning is an effective method for reducing stem elongation during transplant production. This investigation examined the consequences of mechanical conditioning, using brushing and impedance, on subsequent field performance of tomatoes (Lycopersicon esculentum Mill.). Mechanically conditioned transplants of processing tomatoes resumed growth after transplant shock as quickly as did untreated plants, and subsequent canopy development was also equal. In 4 years of field trials, yield was not reduced by mechanical conditioning. Transplants for fresh-market tomatoes may be more sensitive to injury than those for processing tomatoes because …