Digital Commons Network^™

Recent Results From Comptel Observations Of Cygnus X‐1, Mark L. Mcconnell, D J. Forrest, James M. Ryan, W Collmar, V Schonfelder, H Steinle, A W. Strong, R Vandijk, W Hermsen, K Bennett, R Much

Space Science Center

The COMPTEL experiment on the Compton Gamma‐Ray Observatory (CGRO) has now observed Cyg X‐1 on four separate occasions during phase 1 and phase 2 of its orbital mission (April, 1991 to August, 1993). Here we report on the results of the latest analysis of these data, which provide a spectrum extending to energies greater than 2 MeV. A spectral analysis of these data, in the context of a classical Comptonization model, indicates an electron temperature much higher than previous hard X‐ray measurements would suggest (200 keV vs 60–80 keV). This implies either some limitations in the standard Comptonization model and/or …

An Ice-Core-Based Record Of Biomass Burning In The Arctic And Subarctic, 1750-1980, Sallie I. Whitlow, Paul A. Mayewski, Jack E. Dibb, Mark S. Twickler, G Holdsworth

Earth Sciences

No abstract provided.

Exports, Imports And Technology In The Us Industry Of Motor Vehicles And Equipment, Wei Heng Chen

Doctoral Dissertations

During the past two decades a system-wide approach to the analysis of multi-input, multi-output technology has been developed as the result of the application of the duality theory to the production and the development of the flexible functional forms. For empirical research, this system-wide approach has been widely applied to both industrial and national level economic problems. The industry applications usually work in the framework of a closed economy, failing to incorporate foreign trade flows, whereas the national economy applications attempt to consider only the primary factor inputs although foreign trade flows have been incorporated.

In this thesis the system-wide …

Stability Properties For The Constant Of Hyperreflexivity, Ileana Ionascu

Doctoral Dissertations

Let H be a separable, complex, Hilbert space and let ${\cal B}(H$) be the algebra of all (bounded linear) operators on H. We define a function$$\kappa:{\cal B}(H) \to \lbrack 1,\infty\rbrack;\qquad \kappa(T) = K({\cal A}\sb{w}(T)),\qquad \forall T \in {\cal B}(H),$$where ${\cal A}\sb{w}(T$) is the unital weakly closed algebra generated, in ${\cal B}(H$), by T, and $K({\cal A}\sb{w}(T$)) is the constant of hyperreflexivity of ${\cal A}\sb{w}(T$). If H is finite-dimensional, we show that $\kappa$ is continuous at $T \in {\cal B}(H$) if and only if T is non-reflexive or has dimH distinct eigenvalues (Theorem 2.6). An auxiliary result (Theorem 2.1) states that …

Decomposable Functions And Universal C*-Algebras, Llolsten Kaonga

Doctoral Dissertations

This paper deals with universal $C\sp\*$-algebras generated by matricial relations on the generators, for example, the universal $C\sp\*$-algebra with generators $a\sb{ij}, 1 \leq i,j \leq n$, subject to the condition that the matrix ($a\sb{ij}$) be normal and have spectrum in a designated compact subset ${\cal K}$ of the complex plane.

The main thrust of the paper is to compute the K-groups of some of these $C\sp\*$-algebras and to determine when they contain non-trivial projections. In the above example, we show that the K-groups of the algebra coincide with the topological K-groups of the set ${\cal K}$. We show, in general, …

Reflexive Subspaces And Lattices Of Pairs Of Projections, Deborah Narang

Doctoral Dissertations

Consider the sets ${\cal P}\sb{\cal H}$ and ${\cal P}\sb{\cal K}$ of the projections onto closed subspaces of Hilbert spaces ${\cal H}$ and $\cal K$ respectively. From the usual partial orders (based upon set containment) on $\cal P\sb{\cal K}$ and $\cal P\sb{\cal H}$, we can define a partial order on $\cal P\sb{\cal K}\times\cal P\sb{\cal H}$ by ($Q\sb1,P\sb1)\le(Q\sb2, P\sb2)$ if and only if $P\sb1\le P\sb2$ and $Q\sb2\le Q\sb1.$ Then the map $\alpha : \cal P\sb{\cal K}\times \cal P\sb{\cal H}\to \cal P\sb{\cal K\oplus\cal H}$ given by $\alpha(Q,P)=(1-Q)\oplus P$ is an order-preserving map. In particular, if $\cal L\subseteq\cal P\sb{\cal K\times\cal H}$ is a lattice, …

Wind-Driven Observation And Modelling In The Strait Of Gibraltar, Benabdeljelil Abdelkader

Doctoral Dissertations

Meteorological forcing has been found to be responsible for 65% of the subtidal current variance through Gibraltar Strait. However this value does not discriminate between atmospheric pressure and wind. Conditional coherences applied to a 2-input/single output system are computed to distribute the total variance of current data from the Gibraltar Experiment into wind-only, pressure-only, noise and shared forcings. Evidence is presented which shows that, within the subtidal range, wind and atmospheric pressure force the flow equally.

This study focuses on understanding the dynamics of the wind-driven circulation in a 2-layer channel. A channel jet model proves to be very useful …

Ground Water Flow Model For Fractured Media, Ernesto Da Silva Pitombeira

Doctoral Dissertations

In fractured rock systems, ground water flow is not as simple and as methodical as in a porous medium. To create a numerical model of such a flow system, a four-part algorithm was written, which included MATLAB$\sp\circler$ as a fundamental component. It was intended that the model output define the zone of influence of pumping stresses. The four model parts are, sequentially: generation of the interconnected fracture geometry; generation of the linear finite element grid; the hydraulic calculations and the influence zone delineation. MATLAB$\sp\circler$ is used to stochastically generate the fracture geometry from empirical estimates of the probability distributions of: …

The Utilization Of Municipal Solid Waste Combustion Bottom Ash As A Paving Material, Xishun Zhang

Doctoral Dissertations

A research project was conducted to investigate the potentials of using municipal solid waste combustion bottom ash as a paving material. The effort focused on (i) characterization of the time-dependent properties of the bottom ash, (ii) bottom ash utilization as an unbound material in road subbase and base application, and (iii) bottom ash utilization as an aggregate substitution in hot mixture asphalt. A series of standard or non-standard procedures were employed to evaluate bottom ash behavior.

Results indicate that variability of the physical properties of the bottom ash produced during the two years study period is relatively small in view …

On The Berezin Symbol, Semra Kilic-Bahi

Doctoral Dissertations

Let ${\cal H}$ be a functional Hilbert space of analytic functions on a complex domain $\Omega,$ with the normalized reproducing kernel function $k\sb{z},\ z\in\Omega.$ If A is a linear map of ${\cal H}$ into itself, the Berezin symbol, A, of A is defined on $\Omega$ by $\tilde{A}(z) = \langle Ak\sb{z},\ k\sb{z}\rangle.$ The purpose of this research is to study how the properties of an operator are reflected in the properties of its Berezin symbol. In summary, I have (1) studied the properties of the Berezin symbol as a complex-valued function; (2) characterized multiplication operators, induced by a multiplier of ${\cal …

Annual Reports Of Town Officers And Committees For The Town Of Springfield, New Hampshire Including Vital Statistics For The Year 1993., Springfield Town Representatives

Springfield, NH Annual Reports

This is an annual report containing vital statistics for a town/city in the state of New Hampshire.

Bedford, New Hampshire 1994 School District Annual Report., Bedford Town Representatives

Bedford, NH Annual Reports

This is an annual report containing vital statistics for a town/city in the state of New Hampshire.

Annual Report Of The Town Officers Of The Town Of Clarksville, New Hampshire, For The Year Ending December 31, 1993, Including Report Of The School Directors., Clarksville Town Representatives

Clarksville, NH Annual Reports

This is an annual report containing vital statistics for a town/city in the state of New Hampshire.

The Granite, 1994, University Of New Hampshire

The Granite – Yearbook

The yearbook of the New Hampshire College of Agriculture and the Mechanic Arts, 1909-1922, the University of New Hampshire, 1923-

The New Hampshire, Vol. 84, No. 18 (Nov. 5, 1993), The New Hampshire

The New Hampshire Print Edition

An independent student produced newspaper from the University of New Hampshire.

Visualizing Object Oriented Software In Three Dimensions, Colin Ware, David Hui, Glenn Franck

Center for Coastal and Ocean Mapping

There is increasing evidence that it is possible to perceive and understand increasingly comple x information systems if they are displayed a s graphical objects in a three dimensional space . Object-oriented software provides an interestin g test case - there is a natural mapping fro m software objects to visual objects . In this paper we explore two areas. 1) Information perception : we are running controlled experiments to determine empirically if our initial premise is valid; how much more (or less) can be understoo d in 3D than in 2D? 2) Layout: our strategy is to combine partially …

Book Review, Cynthia Dash

RISK: Health, Safety & Environment (1990-2002)

Review of: DONALD C. LEE, TOWARD A SOUND WORLD ORDER: A MULTIDIMENSIONAL HIERARCHICAL ETHICAL THEORY. (Greenwood Press 1992). [240 pp.] Bibliography, index, notes, preface. LC: 91-440942; ISBN:0-313-27903-9. [Cloth $42.95. P.O. Box 5007, Westport CT 06881.]

Author Index To Volume Four, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Index by author to all articles published in Volume Four (1993) of the journal RISK: Issues in Health and Safety.

Book Review, Angela V. Tafro

RISK: Health, Safety & Environment (1990-2002)

Review of: VICE PRESIDENT AL GORE, EARTH IN THE BALANCE: ECOLOGY AND THE HUMAN SPIRIT. (Plume 1993) [368 pp.] Acknowledgements, bibliography, figures, foreword, illustrations, index, notes. LC 92- 34013; ISBN 0-452-26935-0. [Paper $13.00. 375 Hudson Street, New York NY 10014.]

Title Index To Volume Four, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Title index to all articles published in Volume Four (1993) of the journal RISK: Issues in Health and Safety.

Index Of Book Reviews For Volume Four, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Index to book reviews published in Volume Four (1993) of the journal RISK: Issues in Health and Safety.

Schools Respond To Risk Management Programs For Asbestos, Lead In Drinking Water And Radon, Ann Fisher, Lauraine G. Chestnut, Ruth H. Chapman, Robert D. Rowe

RISK: Health, Safety & Environment (1990-2002)

Based on a study of the three EPA-initiated, public school risk management programs noted in the title, the authors find that state agency involvement is an important factor in the success of such programs. They also find, e.g., that school districts are justifiably reluctant to comply with tentative programs

Table Of Contents, Volume Four, Number Four, Fall 1993, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Issues in Health & Safety (ISSN: 1073-8673).

Book Review, Gianna Julian-Arnold

RISK: Health, Safety & Environment (1990-2002)

Review of the book: ENVIRONMENTAL POLITICS: PUBLIC COSTS, PRIVATE REWARDS. (Michael S. Greve & Fred L. Smith, Jr. eds., Praeger 1992) [209 pp.] Acknowledgements, biographical information, figures, foreword by James Q. Wilson, index, notes, selected bibliography, tables. LC 91-44009, ISBN 0-275- 94238-4. [Paper $19.95, cloth $45.00. One Madison Avenue, New York N.Y. 10010.]

Characteristics Of Ion Flow In The Quiet Inner Plasma Sheet, V. Angelopoulos, C. F. Kennel, F. V. Coroniti, R. Pellat, Harlan E. Spence, Margaret G. Kivelson, Raymond J. Walker, W. Baumjohann, W. C. Feldman, J. T. Gosling, C. T. Russell

Physics & Astronomy

Abstract

We use AMPTE/IRM and ISEE 2 data to study the properties of the high beta (β_i > 0.5) plasma sheet, the inner plasma sheet (IPS). Bursty bulk flows (BBFs) are excised from the two databases, and the average flow pattern in the non-BBF (quiet) IPS is constructed. At local midnight this ensemble-average flow is predominantly duskward; closer to the flanks it is mostly earthward. The flow pattern agrees qualitatively with calculations based on the Tsyganenko [1987] model (T87), where the earthward flow is due to the ensemble-average cross tail electric field and the duskward flow is the diamagnetic drift …

Greenland Ice Core “Signal” Characteristics: An Expanded View Of Climate Change, Paul A. Mayewski, L. David Meeker, Michael C. Morrison, Mark S. Twickler, Sallie I. Whitlow, Kevin K. Ferland, Debra A. Meese, M. R. Legrand, J. P. Steffensen

Faculty Publications

The last millenium of Earth history is of particular interest because it documents the environmental complexities of both natural variability and anthropogenic activity. We have analyzed the major ions contained in the Greenland Ice Sheet Project 2 (GISP 2) ice core from the present to ∼674 A.D. to yield an environmental reconstruction for this period that includes a description of nitrogen and sulfur cycling, volcanic emissions, sea salt and terrestrial influences. We have adapted and extended mathematical procedures for extracting sporadic (e.g., volcanic) events, secular trends, and periodicities found in the data sets. Finally, by not assuming that periodic components …

Book Review, Scott Hogan

RISK: Health, Safety & Environment (1990-2002)

Review of: ROBERT A. SHANLEY, PRESIDENTIAL INFLUENCE AND ENVIRONMENTAL POLICY. (Greenwood Press, 1992) [163 pp.] Abbreviations, acknowledgements, index, introduction, notes, selected bibliography. LC 92-15584; ISBN 0-313-25883-X. [$45.00 cloth. 88 Post Road West; Westport CT 06881.]

Proving Environmental Inequity In Siting Locally Unwanted Land Uses, Michael Greenberg

RISK: Health, Safety & Environment (1990-2002)

This paper advances a process for determining whether, e.g., waste-to-energy facilities are disproportionately located in minority and poor communities, and the author asks others to join in searching for a scientifically sound and fair process of resolving conflicting interests in locating LULUs. He also discusses some difficult issues and argues that they need to be addressed by a representative panel.

Toxics Use Reduction: Pro And Con, Francine Laden, George M. Gray

RISK: Health, Safety & Environment (1990-2002)

With the Massachusetts Toxics Use Reduction Act as an example, important issues related to the goals and effectiveness of TUR are examined. The benefits as claimed by proponents are contrasted with shortcomings outlined by opponents in point-counterpoint style. Ultimately, the authors call for more balanced analysis.

Book Review, James R. Baum

RISK: Health, Safety & Environment (1990-2002)

Review of: MANAGEMENT OF HAZARDOUS AGENTS. Vol. 1: INDUSTRIAL AND REGULATORY APPROACHES. Vol. 2: SOCIAL, POLITICAL, AND POLICY ASPECTS. (Duane G. LeVine & Arthur C. Upton eds., Praeger 1992). Each volume contains: bibliography, series foreword, foreword, figures, notes, biographical references, tables, index. Vol. 1: [194 pp.] LC-92-167 ISBN 0-275-94322-4. Vol. 2: [188 pp.] ISBN 0-275-94323-2. [Cloth, each $49.95. 88 Post Road West; Westport CT 06881.]