Physical Sciences and Mathematics Commons^™

Zastosowanie Modelowania Matematycznego Do Oceny Zanieczyszczenia Powietrza Powodowanego Przez Motoryzację, Marian Mazur, Robert Oleniacz, Bożena Biernat-Oleniacz

Robert Oleniacz

The paper presents the results of an inventory of sources of air emissions from the city of Nowy Sacz (Poland) with regard to pollutant emissions from road transport, industrial processes, combustion plants and low-emissions from household furnaces. Particular attention has been devoted to assessing the impact of traffic on air quality in the city. Specified share of emissions from motor vehicles in the state of air pollution in the city center and its outskirts using the method of the atmospheric dispersion modeling.

English title: The use of mathematical modeling to assess air pollution caused by road transport.

Optimal Survey Design For Community Intervention Evaluations: Cohort Or Cross-Sectional?, Paula Diehr

Paula Diehr

Community intervention evaluations that measure changes over time may conduct repeated cross-sectional surveys, follow a cohort of residents over time, or (often) use both designs. Each survey design has implications for precision and cost. To explore these issues, we assume that two waves of surveys are conducted, and that the goal is to estimate change in behavior for people who reside in the community at both times. Cohort designs are shown to provide more accurate estimates (in the sense of lower mean squared error) than cross-sectional estimates if (1) there is strong correlation over time in an individual's behavior at …

Trajectory Mapping And Applications To Data From The Upper Atmosphere Research Satellite, Gary A. Morris, Mark R. Schoeberl, Lynn C. Sparling, Paul A. Newman, Leslie R. Lait, Lee Elson, Joe Waters, Robert A. Suttie, Aidan Roche, Jack Kumer, James M. Russell Iii

Gary A. Morris

The problem of creating synoptic maps from asynoptically gathered trace gas data has prompted the development of a number of schemes. Most notable among these schemes are the Kalman filter, the Salby-Fourier technique, and constituent reconstruction. This paper explores a new technique called "trajectory mapping." Trajectory mapping creates synoptic maps from asynoptically gathered data by advecting measurements backward or forward in time using analyzed wind fields. A significant portion of this work is devoted to an analysis of errors in synoptic trajectory maps associated with the calculation of individual parcel trajectories. In particular, we have considered (1) calculational errors; (2) …

Why The Study Of Mathematics Is One Of The Liberal Arts, David Bressoud

David Bressoud

No abstract provided.

Breaking The Matches In A Paired T-Test For Community Interventions When The Number Of Pairs Is Small, Paula Diehr

Paula Diehr

There is considerable interest in community interventions for health promotion, where the community is the experimental unit. Because such interventions are expensive, the number of experimental units (communities) is usually small. Because of the small number of communities involved, investigators often match treatment and control communities on demographic variables before randomization to minimize the possibility of a bad split. Unfortunately, matching has been shown to decrease the power of the design when the number of pairs is small, unless the matching variable is very highly correlated with the outcome variable (in this case, with change in the health behaviour). We …

Ocena I Weryfikacja Lokalizacji Stanowisk Pomiarowych Imisji Zanieczyszczeń Powietrza W Województwie Kieleckim, Marian Mazur, Robert Oleniacz

Robert Oleniacz

The paper presents the implementation of air pollution monitoring in the province of Kielce (Poland), associated with verification of the location and the measuring range of points to measure the concentrations of air pollutants. For this purpose were used calculations of the pollutants dispersion and statistical analysis of measurement results obtained on existing measuring stations. In the statistical calculations were used analysis of variance homogeneity, based on Cochran, Bartlett and Hartley tests. As a result of analysis and calculations, it was found that the original location is not always correct and does not reflect the spatial differentiation of pollutant concentrations. …

Including Deaths When Measuring Health Status Over Time, Paula Diehr

Paula Diehr

Measuring health status over time is problematic when some subjects die, because death does not have a defined value on most health status measures. This situation is different from the usual missing data problem because the health status of the dead is, in a sense, known. We examined eight strategies for incorporating deaths into such analyses using three health status measures taken from two data sets, after which we used computer simulation to explore more fully the effect of deaths. The strategies differed in the amount of influence given to the deaths, varying from none (deaths were discarded) to complete …

Vortex Dynamics In Single Crystal Yba2cu3o7 Probed By 63cu Nuclear Spin Echo Measurements In The Presence Of Transport Current Pulses, Charles Recchia, C Pennington, H Haughlin, G Lafyatis

Charles H Recchia

No abstract provided.

Automatic Augmented Galerkin Algorithms For Linear First Kind Integral Equations: Non-Singular And Weak Singular Kernels, S. Abbasbandy, E. Babolian

Saeid Abbasbandy

In this paper we describe some iterative algorithms for computing these paramteres for non-singular and weak-singular first kind integral equations. We give also error estimates which are easily computed. Finally, we give a number of numerical examples showing that these algorithms work well in practice and netter than methods presented in [2],[3] and [8].

Local Non-Equilibrium Model For Rapid Solidification Of Undercooled Melts, Sergey Sobolev

Sergey Sobolev

No abstract provided.

Two Temperature Stefan Problem, Sergey Sobolev

Sergey Sobolev

No abstract provided.

Applications Of Extended Thermodynamics ...Part I., Sergey Sobolev

Sergey Sobolev

No abstract provided.

Applications Of Extended Thermodynamics ...Part Ii., Sergey Sobolev

Sergey Sobolev

No abstract provided.

Disseminatorik. Zur Dekonstruktion Der Techno-Logik, Rudolf Kaehr

Rudolf Kaehr

POLYKONTEXTURALE LOGIK. Zur Konzeption, Formalisierung und Validierung. PROÖMIK UND DISSEMINATORIK Abbreviaturen transklassischen Denkens. DISKONTEXTURALITATEN: WOZU NEUE FORMEN DES DENKENS? Zur Kritik der logischen Voraussetzungen der Second Order Cybernetics und der Systemtheorie DISSEMINATORIK: ZUR LOGIK DER 'SECOND ORDER CYBERNETICS' Von den 'Laws of Form' zur Logik der Reflexionsform VOM 'SELBST' IN DER SELBSTORGANISATION Reflexionen zu den Problemen der Konzeptionalisierung und Formalisierung selbstbezüglicher Strukturbildungen SUFI´S DRAI: WOZU DISKONTEXTURALITATEN IN DER AI ? KALKÜLE FÜR SELBSTREFERENTIALITAT ODER SELBSTREFERENTIELLE KALKÜLE? SKIZZE EINER GRAPHEMATISCHEN SYSTEMTHEORIE Zur Problematik der Heterarchie verteilter Systeme im Kontext der New „second-order“ Cybernetics EINÜBUNG IN EINE ANDERE LEKTÜRE. Diagramm einer Rekonstruktion …

Technology, Communication And The Future, David Morgan Lochhead

Dr. David Morgan Lochhead

The future in a "society of generalized communications." final reflection at Ecunet '95, Baltimore, Maryland, May 24, 1995

Book Review: Reasoning Agents In A Dynamic World: The Frame Problem. Kenneth M. Ford And Patrick J. Hayes, Eds.,, Jozsef A. Toth

Jozsef A Toth Ph.D.

No abstract provided.

Seizure Threshold In Electroconvulsive Therapy: I. Initial Seizure Threshold, C. Edward Coffey, Joseph Lucke, Richard D. Weiner, Andrew D. Krystal, Michael Aque

Joseph Lucke

We measured initial seizure threshold by means of a structured stimulus dosage titration procedure in a clinical sample of 111 depressed patients undergoing brief-pulse, constantcurrent electroconvulsive therapy (ECT). Initial seizure threshold was approximately 60 millicoumbs (mc) (10 Joules) on average, but varied widely (6-fold) across patients. Initial seizure threshold was predicted by four variables: electrode placement (higher with bilateral), gender (higher in men), age (higher with increasing age), and dynamic impedance (inverse relationship). Use of neuroleptic medication was associated with a lower seizure threshold. EEG seizure duration was inversely related to initial seizure threshold, but no other relations with seizure …

Seizure Threshold In Electroconvulsive Therapy (Ect): Ii. The Anticonvulsant Effect Of Ect, C. Edward Coffey, Joseph Lucke, Richard D. Weiner, Andrew D. Krystal, Michael Aque

Joseph Lucke

To measure the anticonvulsant effects of a course of electroconvulsive therapy (ECT), we used a flexible stimulus dosage titration procedure to estimate seizure threshold at the first and sixth ECT treatments in 62 patients with depression who were undergoing a course of brief pulse, constant current ECT given at moderately suprathreshold stimulus intensity. Seizure threshold increased by approximately 47% on average, but only 35 (56%) of the 62 patients showed a rise in seizure threshold. The rise in seizure threshold was associated with increasing age, but not with gender, stimulus electrode placement, or initial seizure threshold. Dynamic impedance decreased by …

Assessing Sequential Oncogene Amplification In Human Breast Cancer, Laura E. Janocko, Joseph F. Lucke, David W. Groft, Kathryn A. Brown, Charles A. Smith, Agnese A. Pollice, Sarita G. Singh, Robert Yakulis, Robert J. Hartsock, Stanley E. Shackney

Joseph Lucke

Studies of amplification and/or overexpression of c-myc, HER-2/neu, and H-ras in breast cancer have shown that each is associated with a poor prognosis. The purpose of this study was to explore the possibility that there is a preferred sequence of amplification of these oncogenes in breast cancer. The frequencies of amplification and patterns of co-amplification of c-myc, HER-2/neu, and H-ras were studied in a group of 84 breast cancers. The data suggested a preferred sequence of amplification that consisted of c-myc amplification-HER-2/neu amplification-H-ras amplification. This model was supported by loglinear analysis. In addition, the levels of amplification of JC-A, a …

Living In Virtual Un/Reality, David Morgan Lochhead

Dr. David Morgan Lochhead

Reality and Cyberspace. The Opening Address to the Ecunet '95 Conference in Baltimore, Maryland, May 21, 1995

Precise Experimental Test Of Models For The Breakdown Of The Born-Oppenheimer Separation: The Rotational Spectra Of Isotopic Variants Of Lithium Hydride, Thomas D. Varberg, M. Bellini, P. De Natale, M. Inquscio, J. M. Brown

Thomas D. Varberg

No abstract provided.

Quintuples With Square Triplets, Stan Wagon

Stan Wagon, Retired

No abstract provided.

Articles Pre-1996, Daniel Kaplan

Daniel T. Kaplan

No abstract provided.