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Articles 30511 - 30540 of 42577
Full-Text Articles in Entire DC Network
Bhutan: Its Architectural Heritage And Change, Christopher L. Yip
Bhutan: Its Architectural Heritage And Change, Christopher L. Yip
Architecture
No abstract provided.
Optical Remote Sensing Techniques In Biological Oceanography, W. Paul Bissett, Oscar Schofield, Curtis D. Mobley, Michael F. Crowley, Mark A. Moline
Optical Remote Sensing Techniques In Biological Oceanography, W. Paul Bissett, Oscar Schofield, Curtis D. Mobley, Michael F. Crowley, Mark A. Moline
Biological Sciences
No abstract provided.
Impact Of Dynamic Light And Nutrient Environments On Phytoplankton Communities In The Coastal Ocean, Mark A. Moline, Oscar Schofield, Joe Grzymski
Impact Of Dynamic Light And Nutrient Environments On Phytoplankton Communities In The Coastal Ocean, Mark A. Moline, Oscar Schofield, Joe Grzymski
Biological Sciences
Phytoplankton represent the base of the food web in marine ecosystems. Changes in the structure and composition of these phytoplankton communities will, therefore, have a direct effect on the amount of carbon available to higher trophic levels. In the absence of significant grazing, light and nutrients are the primary factors regulating phytoplankton photosynthesis and productivity in marine environments. As the requirements for light and nutrients differ between species, phytoplankton community structure is also sensitive to dynamic optical and chemical conditions in the water column.
A Sequential Search Distribution: Proofreading, Russian Roulette, And The Incomplete Q-Eulerian Polynomials, Travis Herbranson, Don Rawlings
A Sequential Search Distribution: Proofreading, Russian Roulette, And The Incomplete Q-Eulerian Polynomials, Travis Herbranson, Don Rawlings
Mathematics
The distribution for the number of searches needed to find k of n lost objects is expressed in terms of a refinement of the q-Eulerian polynomials, for which formulae are developed involving homogeneous symmetric polynomials. In the case when k = n and the find probability remains constant, relatively simple and efficient formulas are obtained. From our main theorem, we further (1) deduce the inverse absorption distribution and (2) determine the expected number of times the survivor pulls the trigger in an n-player game of Russian roulette.
A New Wildlife Sighting Reporting And Database System For Lassen Volcanic National Park, John D. Perrine, Jonathan F. Arnold
A New Wildlife Sighting Reporting And Database System For Lassen Volcanic National Park, John D. Perrine, Jonathan F. Arnold
Biological Sciences
Visitors and employees in national parks may observe species of interest to wildlife biologists and resource managers. These sightings are useful to researchers and managers only if the data can be efficiently acquired, stored and retrieved for analysis.· We identified several problems in the wildlife sightings reporting system at Lassen Volcanic National Park, including a confusing array of reporting forms; incomplete contact information for the reporter; insufficient reporting of the animal's description, behavior and location; and a cumbersome data entry and retrieval system. We developed a new system to correct these problems. A single reporting form corrects the aforementioned data …
College Of Liberal Arts Magazine, Fall/Winter 2001, College Of Liberal Arts
College Of Liberal Arts Magazine, Fall/Winter 2001, College Of Liberal Arts
College of Liberal Arts Magazine
No abstract provided.
Terminal Restriction Fragment Patterns: A Tool For Comparing Microbial Communities And Assessing Community Dynamics, Christopher L. Kitts
Terminal Restriction Fragment Patterns: A Tool For Comparing Microbial Communities And Assessing Community Dynamics, Christopher L. Kitts
Biological Sciences
Terminal Restriction Fragment (TRF) patterns, also known as Terminal Restriction Fragment Length Polymorphisms (T-RFLP), are a recently introduced PCR-based tool for studying microbial community structure and dynamics. Since the first review of TRF methodology (Marsh, 1999. Curr. Op. Microbiol. 2: 323-7), at least 35 new research articles were published that include this powerful tool in some part of their reports. This review covers some of the applications that TRF patterns were used for and provides a discussion of how to create and analyze TRF pattern data. This data has the advantage of being simply and rapidly produced using standard DNA …
Sclerosponges: Potential High-Resolution Recorders Of Marine Paleotemperatures, Gary B. Hughes, Charles W. Thayer
Sclerosponges: Potential High-Resolution Recorders Of Marine Paleotemperatures, Gary B. Hughes, Charles W. Thayer
Statistics
Sclerosponges have great potential as seawater temperature recorders. These animals precipitate their skeletons in carbon and oxygen isotopic equilibrium with the surrounding seawater (Druffel and Benavides, 1986). Their skeletons also display chemical properties that vary directly with changes in environmental conditions. Lack of photosynthetic symbionts allows sclerosponges to live below the photic zone, providing the potential to investigate past marine conditions beyond the range of corals. Individual sponges live for several centuries, preserving archives of pre-and postindustrial seawater variations within single specimens (Hartman and Reiswig, 1980). Cross-correlation of successively older specimens could yield up to 2000 years of marine history. …
Authority, Social Theories Of, Eduardo Zambrano
Authority, Social Theories Of, Eduardo Zambrano
Economics
Authority is a relation that exists between individuals, in which one does as indicated by another what he or she would not do in the absence of such indication. With this as background, the article presents the ‘premodern’ notions of authority developed by Plato, Aristotle, Machiavelli, and Weber; and then the perspective given by Arendt, according to which these notions are grounded in an ontological tradition whose time has passed. This leads to the point of view of Lukes, according to which it is unavoidable that multiple perspectives exist in the understanding of authority. These perspectives are associated with the …
Back To Classics: Teaching Limits Through Infinitesimals, Todor D. Todorov
Back To Classics: Teaching Limits Through Infinitesimals, Todor D. Todorov
Mathematics
The usual ϵ, δ-definition of the limit of a function (whether presented at a rigorous or an intuitive level) requires a “candidate L” for the limit value. Thus, we have to start our first calculus course with “guessing” instead of “calculating”. In this paper we criticize the method of using calculators for the purpose of selecting candidates for L. We suggest an alternative: a working formula for calculating the limit value L of a real function in terms of infinitesimals. Our formula, if considered as a definition of limit, is equivalent to the usual ϵ, δ-definition but does not involve …
Explanatory Conversations And Young Children's Developing Scientific Literacy, Jennifer Jipson
Explanatory Conversations And Young Children's Developing Scientific Literacy, Jennifer Jipson
Psychology and Child Development
No abstract provided.
Above‐Threshold Ionization As A Probe Of Multielectron Physics, L. D. Van Woerkom, M. J. Nando, M. A. Walker, G. D. Gillen, H. G. Muller
Above‐Threshold Ionization As A Probe Of Multielectron Physics, L. D. Van Woerkom, M. J. Nando, M. A. Walker, G. D. Gillen, H. G. Muller
Physics
The study of above-threshold ionization (ATI) is now over 20 years old and much has been learned about the interaction of a single atomic electron with intense laser fields. The development of stable, high repetition rate ultrashort pulse laser systems has allowed experiments to probe intricate details of the ionization process using photoelectron and photoion spectroscopies. To date the overwhelming majority of data show that intense laser fields interact with only a single electron at a time to produce the well known features in electron kinetic energy spectra. We will present an overview of state-of-the-art experiments in ATI and show …
Extreme-Value Moment Goodness-Of-Fit Tests, Theodore P. Hill, Victor Perez-Abreu
Extreme-Value Moment Goodness-Of-Fit Tests, Theodore P. Hill, Victor Perez-Abreu
Research Scholars in Residence
A general goodness-of-fit test for scale-parameter families of distributions is introduced, which is based on quotients of expected sample minima. The test is independent of the mean of the distribution, and, in applications to testing for exponentiality of data, compares favorably to other goodness-of-fit tests for exponentiality based on the empirical distribution function, regression methods and correlation statistics. The new minimal-moment method uses ratios of easily-calculated, unbiased, strongly consistent U-statistics, and the general technique can be used to test many standard composite null hypotheses such as exponentiality, normality or uniformity (as well as simple null hypotheses).
Pandolfo Collenuccio's "Specchio D'Esopo" And The Portrait Of The Courtier, Giancarlo Fiorenza
Pandolfo Collenuccio's "Specchio D'Esopo" And The Portrait Of The Courtier, Giancarlo Fiorenza
Art and Design
No abstract provided.
The Greeks Have A Word For It (Bookcover), Sky Bergman, Archie Ferguson
The Greeks Have A Word For It (Bookcover), Sky Bergman, Archie Ferguson
Art and Design
Cover photograph © Sky Bergman 2001 Cover design by Archie Ferguson
Bottom Mounted Doppler Flow Meter For Canals, Stuart W. Styles
Bottom Mounted Doppler Flow Meter For Canals, Stuart W. Styles
BioResource and Agricultural Engineering
Doppler technology, similar to that used by meteorologist to track weather patterns, has been developed and expanded to fill the need for advanced water flow measurement technology that is relatively easy to use, applicable to various hydraulic conditions, and very accurate. This report discusses the operation of doppler units, provides a comparison of the technology, benefits, cost, and use.
Pumped Storage: Simple Changes, Big Savings, Charles M. Burt
Pumped Storage: Simple Changes, Big Savings, Charles M. Burt
BioResource and Agricultural Engineering
Several California irrigation districts achieved savings on electrical energy charges by implementing various types of pumped storage systems. Pumped storage uses some type of reservoir to store pumped water at a higher elevation than the original water supply. During times of peak statewide electricity demand, pumping is reduced while water is withdrawn from the reservoir which acts as a buffer.
Adjustable Magnetic Coupler, Charles M. Burt
Adjustable Magnetic Coupler, Charles M. Burt
BioResource and Agricultural Engineering
Efficiency in terms of power consumption is vital and continues to be increasingly important. The use of adjustable speed pumps can reduce energy consumption and improve controllability of pressure or flows. One such technology, the MagnaDrive coupler, has been developed for service in a variety of applications.
Load Monitoring System, Charles M. Burt
Load Monitoring System, Charles M. Burt
BioResource and Agricultural Engineering
Arvin-Edison Water Storage District received a loan - from the CEC's loan program for the development of new energy conservation technology - in 1995 to develop a program with variable frequency drives. This report discusses the design of the "Load Monitoring System", cost, the need for such a system, initial start-up challenges, configuration options, and benefits.
Higher Twist Contributions To R-Hadron Phenomenology In The Light Gluino Scenario, Thomas D. Gutierrez, R. Vogt, J. F. Gunion
Higher Twist Contributions To R-Hadron Phenomenology In The Light Gluino Scenario, Thomas D. Gutierrez, R. Vogt, J. F. Gunion
Physics
The open light gluino window allows non-trivial higher-twist gluino contributions to the proton wave function. Using a two-component model originally developed for charm hadroproduction, higher-twist intrinsic gluino contributions to final-state R-hadron formation are shown to enhance leading-twist production in the forward xnF region. We calculate R-hadron production at Pnlab=800 GeV in pp, pBe, and pCu interactions with light gluino masses of 1.2, 1.5, 3.5, and 5.0 GeV.
December 6, 2000 Cal Poly Report, Public Affairs Office
December 6, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Electrical Feedthrough And Its Preparation, Leonard E. Peck, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Electrical Feedthrough And Its Preparation, Leonard E. Peck, Timothy S. Romano, Tom K. Evans, Gary B. Hughes, Karl H. Neumann
Statistics
An electrical feedthrough (34) is prepared by furnishing an aluminum oxide feedthrough plate (70) and at least one feedthrough pin (80) having a length greater than the thickness of the feedthrough plate (70). A pin bore (78) is formed through the feedthrough plate (70) for each feedthrough pin (80). Each pin bore (78) has a pin bore (78) size greater than the feedthrough pin (80) size, preferably by an amount no greater than that required to permit the penetration of a brazing metal (88) between the pin bore (78) and the feedthrough pin (80). Each feedthrough pin (80) is inserted …
Environmental Management Of Wastes In The Semiconductor And Electronics Industries, Samuel A. Vigil
Environmental Management Of Wastes In The Semiconductor And Electronics Industries, Samuel A. Vigil
Civil and Environmental Engineering
The management of wastes in the semiconductor and electronics industries requires a multidisciplinary approach that considers the health and safety of employees as well as the treatment and recycling of waste materials. The manufacturing of semiconductor devices requires the use of many toxic chemicals and gases. Air emissions from manufacturing tools must be carefully monitored both inside and outside of the fabrication facility. Liquid effluents must be collected and pretreated before discharge to local wastewater systems. The subsequent use and eventual discard of electronic devices such as television sets and personal computers by consumers has created a new set of …
Mustang Daily, December 1, 2000
Mustang Daily, December 1, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Seaway: A Multi-Agent Decision-Support System For Naval Expeditionary Logistic Operations, Anthony Wood, Kym Jason Pohl, Justin Crawford, Mark Lai, John Fanshier, Ken Cudworth, Tom Tate, Hisham Assal, Shawn Pan, Jens G. Pohl
Seaway: A Multi-Agent Decision-Support System For Naval Expeditionary Logistic Operations, Anthony Wood, Kym Jason Pohl, Justin Crawford, Mark Lai, John Fanshier, Ken Cudworth, Tom Tate, Hisham Assal, Shawn Pan, Jens G. Pohl
Collaborative Agent Design (CAD) Research Center
This report describes work performed by CDM Technologies Inc. in conjunction with the Collaborative Agent Design (CAD) Research Center of California Polytechnic State University (Cal Poly), San Luis Obispo, for the Office of Naval Research (ONR), on the SEAWAY experimental system for planning, gaming and executing maritime logistic operations from a sea base. SEAWAY incorporates three fundamental concepts that distinguish it from existing (i.e., legacy) command and control applications. First, it is a collaborative system in which computer-based agents assist human operators by monitoring, analyzing and reasoning about events in near real-time. Second, SEAWAY includes an ontological model of the …
Grading Error Reduces Grower Incentive To Increase Prune Quality, Jennifer S. James, James A. Chalfant, Nathalie Lavoie, Richard J. Sexton
Grading Error Reduces Grower Incentive To Increase Prune Quality, Jennifer S. James, James A. Chalfant, Nathalie Lavoie, Richard J. Sexton
Agribusiness
Grading is important to ensure the production of high-quality foods, but It Is usually done with error, distorting market signals and diminishing Incentives to produce high-quality products. Size is the main quality criterion for dried prunes and the crucial characteristic In determining prune value. We studied the economic effects of errors In commodity grading, focusing In particular on the Implications of one-way (asymmetric) grading errors, namely when small, low quality product Is erroneously classified as high quality, but not vice versa. In an application to the California prune Industry, we estimated the extent to which large prunes are undervalued and …
Theory And Experiment Of High-Speed Cross-Gain Modulation In Semiconductor Lasers, Xiaomin Jin, T. Keating, Shun-Lien Chuang
Theory And Experiment Of High-Speed Cross-Gain Modulation In Semiconductor Lasers, Xiaomin Jin, T. Keating, Shun-Lien Chuang
Electrical Engineering
We present theory and experiment for the high-speed modulation response of a quantum-well (QW) laser in the presence of an external microwave modulated optical pump in the gain region. The model includes the effects of pump-induced stimulated recombination and cross-gain saturation. Expressions for the small-signal modulation response of the test laser under gain modulation are derived. We also present experimental results using a multiple-QW InGaAlAs Fabry-Perot (FP) laser at 1.552 μm as the test laser and an external pump by a 1.542 μm DFB laser. Comparison between electrical modulation and optical cross-gain modulation (XGM) of the test laser is also …
Who Wants To Be Healthy?, Joyce V. Fetro, David W. Hey
Who Wants To Be Healthy?, Joyce V. Fetro, David W. Hey
Kinesiology and Public Health
No abstract provided.
Mustang Daily, November 30, 2000
Mustang Daily, November 30, 2000
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
November 29, 2000 Cal Poly Report, Public Affairs Office
November 29, 2000 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.