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2002

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Full-Text Articles in Physical Sciences and Mathematics

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 18, Number 9, June 2002, College Of Engineering And Computer Science, Wright State University Jun 2002

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 18, Number 9, June 2002, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A twelve page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

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The Introduction And Aquaculture Of Non-Endemic Species In Western Australia: The ‘Rotund’ Yabby Cherax Rotundus And The All-Male Hybrid Yabby. A Discussion Paper., Department Of Fisheries Jun 2002

The Introduction And Aquaculture Of Non-Endemic Species In Western Australia: The ‘Rotund’ Yabby Cherax Rotundus And The All-Male Hybrid Yabby. A Discussion Paper., Department Of Fisheries

Fisheries management papers

This discussion paper has been prepared to provide information to assist in the assessment of the possible impact of the translocation of Cherax rotundus and allmale hybrid yabbies within Western Australia, for the purposes of commercial aquaculture on private properties. In assessing the translocation of any aquatic species, the economic and social benefits must be balanced with biological and environmental risks.

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Discussion Paper : The Translocation Of Brown Trout (Salmo Trutta) And Rainbow Trout (Oncorhynchus Mykiss) Into And Within Western Australia., Western Australian Fisheries Jun 2002

Discussion Paper : The Translocation Of Brown Trout (Salmo Trutta) And Rainbow Trout (Oncorhynchus Mykiss) Into And Within Western Australia., Western Australian Fisheries

Fisheries management papers

This discussion paper has been prepared to assist in the assessment of the possible impact of the translocation of brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss), into and within Western Australia, for the purposes of recreational stock enhancement in public waters, non-commercial aquaculture on private properties and commercial aquaculture. In assessing the translocation of any aquatic species, economic and social benefits must be balanced with biological and environmental risks.

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Quality Control For Usda Nrcs Sm–St Network Soil Temperatures: A Method And A Dataset, Q. Steven Hu, Song Feng, Garry Schaefer Jun 2002

Quality Control For Usda Nrcs Sm–St Network Soil Temperatures: A Method And A Dataset, Q. Steven Hu, Song Feng, Garry Schaefer

School of Natural Resources: Faculty Publications

In 1991, the U.S. Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) established its Soil Moisture–Soil Temperature (SM–ST) Pilot Network consisting of 21 stations in 19 states in the contiguous United States. At each station, soil temperatures were measured at up to six different depths from 5.08 to 203.20 cm (or 2–80 in.) below the surface. Before 1997, the observations were made every 6 h, and they increased to hourly beginning in 1997. The goal of this network is to provide near–real time soil temperature and soil moisture observations in different regions across the United States for agricultural and …

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Wpływ Związków Metali Alkalicznych W Procesie Spiekania Rud Na Emisję Pyłów, Marian Mazur, Marek Bogacki, Robert Oleniacz Jun 2002

Wpływ Związków Metali Alkalicznych W Procesie Spiekania Rud Na Emisję Pyłów, Marian Mazur, Marek Bogacki, Robert Oleniacz

Robert Oleniacz

The work shows the impact of alkali metals in the sintering process on effectiveness of the electrostatic precipitator and dust emissions into the air. The results of analysis of the content of Na and K in dust discharged from the sinter strand and emitted to the air are presented. It was found that this content is subject to large fluctuations and significantly increases in the dust phase after electrostatic precipitators. Using the balance sheet data, the effect of loads of Na2O and K2O compounds contributed to the sinter mix on emissions of dust. It was also observed high variability of …

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Robust Estimation Of Origin-Destination Matrices, Byron J. Gajewski, Laurence R Rilett, Michael P. Dixon, Clifford H. Spiegelman Jun 2002

Robust Estimation Of Origin-Destination Matrices, Byron J. Gajewski, Laurence R Rilett, Michael P. Dixon, Clifford H. Spiegelman

Byron J Gajewski

The demand for travel on a network is usually represented by an origin-destination (OD) trip table or matrix. OD trip tables are typically estimated with synthetic techniques that use observed data from the traffic system, such as link volume counts from intelligent transportation systems (ITS), as input. A potential problem with current estimation techniques is that many ITS volume counters have a relatively high error rate. The focus of this paper is on the development of estimators explicitly designed to be robust to outliers typically encountered in ITS. Equally important, standard errors are developed so that the parameter reliability can …

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Polarization Jet Events And Excitation Of Weak Sar Arcs, S. Sazykin, Bela G. Fejer, Y. I. Galperin, S. A. Grigoriev, L. V. Zinin, M. Mendillo Jun 2002

Polarization Jet Events And Excitation Of Weak Sar Arcs, S. Sazykin, Bela G. Fejer, Y. I. Galperin, S. A. Grigoriev, L. V. Zinin, M. Mendillo

Bela G. Fejer

[1] Polarization Jet (PJ), also known as Sub-Auroral Ion Drift (SAID), events are supersonic westward plasma drifts on the equatorward edge of the diffuse aurora in the evening and nighttime sector. Their optical F-region signatures are weak 630.0 nm red arcs colocated with regions of fast convection. These weak arcs resemble Stable Auroral Red (SAR) arcs observed during the recovery phase of magnetic storms, but have lower intensities, shorter lifetimes, and occur without a significant heat flux from the magnetosphere. Previous model studies underestimated the brightness of weak SAR arcs. We present calculations showing that ion-neutral collisional heating and ion …

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Effects Of Sponge Encrustation On The Swimming Behaviour, Energetics And Morphometry Of The Scallop Chlamys Hastata, Deborah Anne Donovan, Brian L. Bingham, Heather M. (Heather Maria) Farren, Rodolfo Gallardo, Veronica L. Vigilant Jun 2002

Effects Of Sponge Encrustation On The Swimming Behaviour, Energetics And Morphometry Of The Scallop Chlamys Hastata, Deborah Anne Donovan, Brian L. Bingham, Heather M. (Heather Maria) Farren, Rodolfo Gallardo, Veronica L. Vigilant

Environmental Sciences Faculty and Staff Publications

The effect of sponge encrustation on swimming ability of Chlamys hastata was determined by investigating swimming behaviour, scallop morphometry, and energy expended during swimming with and without commensal epibionts. Scallops swam significantly longer after sponge encrustation was removed from their shells, but no significant differences were detected in swimming elevation or distance. Scallops with sponge encrustation showed no adductor muscle hypertrophy or changes in shell morphometry compared to scallops without encrustation. However, C. hastatadid exhibit scaling relationships associated with maximizing swimming efficiency. Specifically, shell width and adductor muscle mass were positively allometric with shell height, while shell mass was …

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Global Stability Of Cycles: Lotka-Volterra Competition Model With Stocking, Saber Elaydi, Abdul-Aziz Yakubu Jun 2002

Global Stability Of Cycles: Lotka-Volterra Competition Model With Stocking, Saber Elaydi, Abdul-Aziz Yakubu

Mathematics Faculty Research

In this article, we prove that in connected metric spaces k - cycles are not globally attracting (where k>2). We apply this result to a two species discrete-time Lotka-Volterra competion model with stocking. In particular, we show that an k-cycle cannot be the ultimate life-history of evolution of all population sizes. This solves Yakubu's conjecture but the question on the structure of the boundary of the basins of attraction of the locally stable n-cycles is still open.

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Transport Out Of The Antarctic Polar Vortex From A Three-Dimensional Transport Model, Shuhua Li, Eugene Cordero, David J. Karoly Jun 2002

Transport Out Of The Antarctic Polar Vortex From A Three-Dimensional Transport Model, Shuhua Li, Eugene Cordero, David J. Karoly

Faculty Publications, Meteorology and Climate Science

[1] A three-dimensional chemical transport model is utilized to study the transport out of the Antarctic polar vortex during the southern hemisphere spring. On average, over five consecutive years between 1993 and 1997, horizontal transport out of the vortex into the midlatitude stratosphere is smaller than vertical transport into the troposphere. However, there is significant interannual variability in the magnitude of mass exchange, which is related to year-to-year fluctuations in planetary wave activity. In 1994 the net loss of the vortex tracer mass in September is similar to that in October. However, the relative mass flux entering the midlatitude stratosphere …

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From The Editor, Issue 26, 2002, Alvin White Jun 2002

From The Editor, Issue 26, 2002, Alvin White

Humanistic Mathematics Network Journal

No abstract provided.

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History Of Mathematics, An Intuitive Approach, Alejandro R. Garciadiego Jun 2002

History Of Mathematics, An Intuitive Approach, Alejandro R. Garciadiego

Humanistic Mathematics Network Journal

The main goal of this essay is to discuss, informally, an intuitive approach to the history of mathematics as an academic discipline. The initial point of departure includes the analysis of some traditional definitions of the concept of 'history' taken from standard dictionaries. This concise dissection attempts to suggest the complexity of the discipline.

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Comments On Zal Usiskin's Article In The Humanistic Mathematics Network Journal For May, 2001, Robert Stein Jun 2002

Comments On Zal Usiskin's Article In The Humanistic Mathematics Network Journal For May, 2001, Robert Stein

Humanistic Mathematics Network Journal

No abstract provided.

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Humanizing Mathematics: The Humanistic Impression In The Course For Mathematics Teaching, Ada Katsap Jun 2002

Humanizing Mathematics: The Humanistic Impression In The Course For Mathematics Teaching, Ada Katsap

Humanistic Mathematics Network Journal

No abstract provided.

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Loopy, George W. Hart Jun 2002

Loopy, George W. Hart

Humanistic Mathematics Network Journal

No abstract provided.

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A Brief Look At Mathematics And Theology, Philip J. Davis Jun 2002

A Brief Look At Mathematics And Theology, Philip J. Davis

Humanistic Mathematics Network Journal

No abstract provided.

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Pat's Prologues: Introductions To The First Two Airings Of Math Medley, A Radio Talk Show, Patricia Clark Kenschaft Jun 2002

Pat's Prologues: Introductions To The First Two Airings Of Math Medley, A Radio Talk Show, Patricia Clark Kenschaft

Humanistic Mathematics Network Journal

No abstract provided.

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Notes On Formal Constructivism, D. Joyner, P. Lejarraga Jun 2002

Notes On Formal Constructivism, D. Joyner, P. Lejarraga

Humanistic Mathematics Network Journal

Our aim is to sketch some ideas related to how we (as in, we two) think we (as in, we humans) think. "That theory is useless. It isn't even wrong." - Wolfgang Pauli. Our hope in this paper is to provide a theory, admittedly somewhat vague, of how we think about mathematics. We also hope our ideas do not cause the reader to be reminded of Pauli's quote above. These notes were motivated by the interesting book by Changeaux and Connes.

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Calculus, Sarah Glaz Jun 2002

Calculus, Sarah Glaz

Humanistic Mathematics Network Journal

No abstract provided.

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Aphorisms, Lee Goldstein Jun 2002

Aphorisms, Lee Goldstein

Humanistic Mathematics Network Journal

No abstract provided.

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Book Review: My Dance Is Mathematics By Joanne Growney, Sally Lipsey Jun 2002

Book Review: My Dance Is Mathematics By Joanne Growney, Sally Lipsey

Humanistic Mathematics Network Journal

No abstract provided.

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When Is A Math Problem Really "Real"?, Michael E. Goldberg Jun 2002

When Is A Math Problem Really "Real"?, Michael E. Goldberg

Humanistic Mathematics Network Journal

No abstract provided.

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"Magic In A Box", Lacie Juris Jun 2002

"Magic In A Box", Lacie Juris

Humanistic Mathematics Network Journal

No abstract provided.

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Book Review: The Teaching Gap By James W. Stigler And James Hiebert, Michael L. Brown Jun 2002

Book Review: The Teaching Gap By James W. Stigler And James Hiebert, Michael L. Brown

Humanistic Mathematics Network Journal

No abstract provided.

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Portfolio Assessment In Liberal Arts Mathematics, Mike Kenyon Jun 2002

Portfolio Assessment In Liberal Arts Mathematics, Mike Kenyon

Humanistic Mathematics Network Journal

This paper describes my efforts to incorporate problem-solving portfolios into my liberal arts mathematics course. I begin with a description of the components of the portfolios and the factors I consider in evaluating them. I then address some of the more significant obstacles I have encountered as well as what I consider to be among the major benefits. A selection from one student’s portfolio is appended.

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Marcy's Dots: A Problem On National Test Revisited, Patricia Baggett, Andrzej Ehrenfeucht Jun 2002

Marcy's Dots: A Problem On National Test Revisited, Patricia Baggett, Andrzej Ehrenfeucht

Humanistic Mathematics Network Journal

No abstract provided.

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Divisibility: A Problem Solving Approach Through Generalizing And Specializing, Rina Zazkis Jun 2002

Divisibility: A Problem Solving Approach Through Generalizing And Specializing, Rina Zazkis

Humanistic Mathematics Network Journal

This paper describes a divisibility rule for any prime number as an engaging problem-solving activity for preservice secondary school mathematics teachers.

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Equation Story, Whitney Perret Jun 2002

Equation Story, Whitney Perret

Humanistic Mathematics Network Journal

No abstract provided.

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Special Section: On The Publication Of The 26th Issue Of The Humanistic Mathematics Network Journal, Sandra Z. Keith Jun 2002

Special Section: On The Publication Of The 26th Issue Of The Humanistic Mathematics Network Journal, Sandra Z. Keith

Humanistic Mathematics Network Journal

No abstract provided.

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Does A Mathematical/Scientific Worldview Lead To A Clearer Or More Distorted View Of Reality?: Purposive Musings Inspired From Readings In The Urantia Book, The Cosmic Family, Volume I, And Elsewhere, Jeru Jun 2002

Does A Mathematical/Scientific Worldview Lead To A Clearer Or More Distorted View Of Reality?: Purposive Musings Inspired From Readings In The Urantia Book, The Cosmic Family, Volume I, And Elsewhere, Jeru

Humanistic Mathematics Network Journal

No abstract provided.

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