Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

PDF

University of New Hampshire

1992

Articles 1 - 25 of 25

Full-Text Articles in Physical Sciences and Mathematics

Downhole Logging As A Paeoceanographic Tool On Ocean Drilling Program Leg 138: Interface Between High-Resolution Stratigraphy And Regional Syntheses, Mitchell Lyle, Larry A. Mayer, Nicklas G. Pisias, T. K. Hagelberg, Kathleen A. Dadey, Stephen F. Bloomer, Shipboard Scientific Party Dec 1992

Downhole Logging As A Paeoceanographic Tool On Ocean Drilling Program Leg 138: Interface Between High-Resolution Stratigraphy And Regional Syntheses, Mitchell Lyle, Larry A. Mayer, Nicklas G. Pisias, T. K. Hagelberg, Kathleen A. Dadey, Stephen F. Bloomer, Shipboard Scientific Party

Affiliate Scholarship

On Ocean Drilling Program (ODP) Leg 138, standard shipboard procedures were modified to allow for the real-time monitoring of several laboratory core-scanning systems that provide centimeter-scale measurements of saturated bulk density, magnetic susceptibility and digital color reflectance. These continuous, high-resolution data sets were used to ensure the proper offset of multiple holes and to splice together complete sedimentary sections. Typically, the spliced, continuous sediment sections were found to be about 10% longer than the section drilled, as measured by the length of the drill string. While the source of this elongation is not yet fully understood, it must be compensated …

Go to article

Downhole Logging As A Paeoceanographic Tool On Ocean Drilling Program Leg 138: Interface Between High-Resolution Stratigraphy And Regional Syntheses, Mitchell Lyle, Larry A. Mayer, Nicklas G. Pisias, T. K. Hagelberg, Kathleen A. Dadey, Stephen F. Bloomer Dec 1992

Downhole Logging As A Paeoceanographic Tool On Ocean Drilling Program Leg 138: Interface Between High-Resolution Stratigraphy And Regional Syntheses, Mitchell Lyle, Larry A. Mayer, Nicklas G. Pisias, T. K. Hagelberg, Kathleen A. Dadey, Stephen F. Bloomer

Center for Coastal and Ocean Mapping

On Ocean Drilling Program (ODP) Leg 138, standard shipboard procedures were modified to allow for the real-time monitoring of several laboratory core-scanning systems that provide centimeter-scale measurements of saturated bulk density, magnetic susceptibility and digital color reflectance. These continuous, high-resolution data sets were used to ensure the proper offset of multiple holes and to splice together complete sedimentary sections. Typically, the spliced, continuousediment sections were found to be about 10% longer than the section drilled, as measured by the length of the drill string. While the source of this elongation is not yet fully understood, it must be compensated for …

Go to article

Beryllium 7 And Lead 210 In The Western Hemisphere Arctic Atmosphere: Observations From Three Recent Aircraft-Based Sampling Programs, Jack E. Dibb, R. Talbot, G L. Gregory Oct 1992

Beryllium 7 And Lead 210 In The Western Hemisphere Arctic Atmosphere: Observations From Three Recent Aircraft-Based Sampling Programs, Jack E. Dibb, R. Talbot, G L. Gregory

Earth Sciences

Concentrations of the natural radionuclides 7Be and 210Pb were determined in aerosol samples collected in the western hemisphere Arctic during the recent NOAA Arctic Gas and Aerosol Sampling Program (AGASP 3) and NASA Global Tropospheric Experiment/Arctic Boundary Layer Expeditions (GTE/ABLE 3A and ABLE 3B) missions. Beryllium 7 showed a free tropospheric concentration maximum between 4 and 5 km in the summer of 1990. Previous 7Be data obtained in the late 1950s and early 1960s also indicated a similar vertical distribution of 7Be near 70°N. Injection of stratospheric air through tropopause folds associated with the Arctic jet …

Go to article

Risk Estimation And Expert Judgment: The Case Of Yucca Mountain, Kristin Shrader-Frechette Sep 1992

Risk Estimation And Expert Judgment: The Case Of Yucca Mountain, Kristin Shrader-Frechette

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

Professor Shrader-Frechette discusses factors responsible for acute disagreement between the federal government and Nevada citizens over potential Risks at Yucca Mountain and focuses on the use of expert judgment, concluding that some of them appear to exemplify "bad science." That aside, she argues that 1,000 year predictions cannot be made from current knowledge of geology or, e.g., institutional behavior and concludes that permanent disposal of radioactive waste is currently impossible.

Go to article

Testing The Role Of Technical Information In Public Risk Perception, Branden B. Johnson, Peter M. Sandman, Paul Miller Sep 1992

Testing The Role Of Technical Information In Public Risk Perception, Branden B. Johnson, Peter M. Sandman, Paul Miller

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

It is widely believed that more detail about health effects and likely exposure routes is apt to reduce citizens' concerns about low-probability Risks. The authors' study suggests that providing such detail may not be as useful as, e.g., addressing public concerns and keeping citizens current on officials' actions.

Go to article

Book Review, Peter C. Christensen Sep 1992

Book Review, Peter C. Christensen

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

Review of: MARY R. ENGLISH, SITING LOW-LEVEL RADIOACTIVE WASTE DISPOSAL FACILITIES: THE PUBLIC POLICY DILEMMA. (Quorum Books 1992) [278 pp.], Appendices, index, introduction, references. LC-91-42774; ISBN 0-89930-560-1. [$49.95 cloth. One Madison Avenue, New York NY 10010.]

Go to article

Using Risk On Disk, Risk Editorial Board Sep 1992

Using Risk On Disk, Risk Editorial Board

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

Short announcement from Volume 3 (1992) stating that computer access to Risk is available on 3.5 inch floppy disks. The announcement describes how to search the computerized volumes and recommends some search applications that can be used to search the computerized content.

Go to article

Author Index To Volume Three, Risk Editorial Board Sep 1992

Author Index To Volume Three, Risk Editorial Board

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

Index by author to all articles published in Volume Three (1992) of the journal Risk: Issues in Health and Safety.

Go to article

Table Of Contents, Volume Three, Number Four, Fall 1992, Risk Editorial Board Sep 1992

Table Of Contents, Volume Three, Number Four, Fall 1992, Risk Editorial Board

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

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

Go to article

Book Review Index To Volume Three, Risk Editorial Board Sep 1992

Book Review Index To Volume Three, Risk Editorial Board

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

Index to book reviews published in Volume Three (1992) of the journal Risk: Issues in Health and Safety.

Go to article

Title Index To Volume Three, Risk Editorial Board Sep 1992

Title Index To Volume Three, Risk Editorial Board

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

Title index to all articles published in Volume Three (1992) of the journal Risk: Issues in Health and Safety.

Go to article

Differential Phase Estimation With The Seamarc Ii Bathymetric Sidescan Sonar System, M A. Masnadi-Shirazi, Christian De Moustier, Pierre Cervenka, Stanley H. Zisk Jul 1992

Differential Phase Estimation With The Seamarc Ii Bathymetric Sidescan Sonar System, M A. Masnadi-Shirazi, Christian De Moustier, Pierre Cervenka, Stanley H. Zisk

Center for Coastal and Ocean Mapping

A maximum-likelihood estimator is used to extract differential phase measurements from noisy seafloor echoes received at pairs of transducers mounted on either side of the SeaMARC II bathymetricsidescan sonar system. Carrier frequencies for each side are about 1 kHz apart, and echoes from a transmitted pulse 2 ms long are analyzed. For each side, phase difference sequences are derived from the full complex data consisting of base-banded and digitized quadrature components of the received echoes. With less bias and a lower variance, this method is shown to be more efficient than a uniform mean estimator. It also does not exhibit …

Go to article

Table Of Contents, Volume Three, Number Three, Summer 1992, Risk Editorial Board Jun 1992

Table Of Contents, Volume Three, Number Three, Summer 1992, Risk Editorial Board

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

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

Go to article

Table Of Contents, Volume Three, Number Two, Spring 1992, Risk Editorial Board Mar 1992

Table Of Contents, Volume Three, Number Two, Spring 1992, Risk Editorial Board

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

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

Go to article

Identifying Chemical Hazards For Regulation: The Scientific Basis And Regulatory Scope Of California's Proposition 65 List Of Carcinogens And Reproductive Toxicants, William S. Pease Mar 1992

Identifying Chemical Hazards For Regulation: The Scientific Basis And Regulatory Scope Of California's Proposition 65 List Of Carcinogens And Reproductive Toxicants, William S. Pease

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

Noting that the Proposition 65 list has become an authoritative source for hazard identification, Dr. Pease examines its legislative, regulatory and scientific origins. After analyzing the California approach, he offers suggestions for better selection of future regulatory targets.

Go to article

Evaluation And Verification Of Bottom Acoustic Reverberation Statistics Predicted By The Point Scattering Model, Dimitri Alexandrou, Christian De Moustier, G Haralabus Mar 1992

Evaluation And Verification Of Bottom Acoustic Reverberation Statistics Predicted By The Point Scattering Model, Dimitri Alexandrou, Christian De Moustier, G Haralabus

Center for Coastal and Ocean Mapping

The point scatteringmodel offers a parameterization of the reverberation probability density function (pdf) in terms of the coefficient of excess (kurtosis) and a coherent component represented by a harmonic process with random phase. In this paper the potential utility of this parametrization is investigated in the context of seafloor characterization. The problem of separating out the effect of each parameter is discussed. Computer simulations are used to verify model predictions on the reverberation quadrature, envelope, and phase pdf. As part of the verification study, the scatterer density was determined from the kurtosis of the reverberation quadrature pdf. A statistical analysis …

Go to article

Book Review, Thomas G. Field Jr. Mar 1992

Book Review, Thomas G. Field Jr.

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

Review of the following book: THOMAS GILOVICH, How WE KNOW WHAT ISN'T SO: THE FALLIABILITY OF REASON IN EVERYDAY LIFE. (The Free Press 1991) [216 pp.] Index, notes. CIP: 90-26727; ISBN: 0-02-911705-4. [Cloth $19.95. 866 Third Ave. New York, NY 10022.]

Go to article

The Accumulation Of 210pb At Summit, Greenland Since 1855, Jack E. Dibb Feb 1992

The Accumulation Of 210pb At Summit, Greenland Since 1855, Jack E. Dibb

Earth Sciences

The decay corrected activity of 210Pb at the time of deposition shows considerable short term variability, but no clear seasonal or annual periodicity. 210Pb activity in surface snow at this site has averaged 0.7 pCi kg-1 since 1927, but the period 1915-1927 is characterized by a steady decline from higher levels. The average annual accumulation of 210Pb has markedly declined since at least 1870. Similar observation at Dye 3 suggest that 210Pb accumulation has decreased throughout this century over much of the Greenland Ice Sheet. If the records of 210Pb in the firn of the Greenland Ice Sheet are mainly …

Go to article

The Gamma-Ray Burst Of 3 May 1991 Observed By Comptel On Board Gro, C Winkler, K Bennett, H Bloemen, W Collmar, A Connors, R Diehl, J W. Den Herder, W Hermsen, R M. Kippen, L Kuiper, G G. Lichti, J Lockwood, Mark L. Mcconnell, D Morris, James M. Ryan, V. Schonfelder, J G. Stacy, H Steinle, A W. Strong, B Swanenburg, B G. Taylor, M Varendorff, C De Vries Feb 1992

The Gamma-Ray Burst Of 3 May 1991 Observed By Comptel On Board Gro, C Winkler, K Bennett, H Bloemen, W Collmar, A Connors, R Diehl, J W. Den Herder, W Hermsen, R M. Kippen, L Kuiper, G G. Lichti, J Lockwood, Mark L. Mcconnell, D Morris, James M. Ryan, V. Schonfelder, J G. Stacy, H Steinle, A W. Strong, B Swanenburg, B G. Taylor, M Varendorff, C De Vries

Physics & Astronomy

The Compton Gamma-Ray Observatory was launched on April 5, 1991, carrying the imaging Compton telescope COMPTEL. Since its activation on April 25, 1991, COMPTEL has observed several gamma-ray bursts in its 1-sr field of view. The strongest of these bursts was observed on May 3, 1991. Event data over 0.8 MeV to 30 MeV as well as time resolved spectra over 0.1 MeV to 10 MeV have been recorded. For the first time, a direct single-telescope MeV image of a cosmic gamma-ray burst has been produced. The burst is located at (l,b) = (171.8 deg, 6.4 deg) with a statistical …

Go to article

Marine Sediment Classification Using The Chirp Sonar, Lester R. Leblanc, Larry A. Mayer, Manuel Rufino, Steven G. Schock, John King Jan 1992

Marine Sediment Classification Using The Chirp Sonar, Lester R. Leblanc, Larry A. Mayer, Manuel Rufino, Steven G. Schock, John King

Affiliate Scholarship

The chirpsonar is a calibrated wideband digital FMsonar that provides quantitative, high‐resolution, low‐noise subbottom data. In addition, it generates an acoustic pulse with special frequency domain weighting that provides nearly constant resolution with depth. The chirpsonar was developed with the objective of remote acoustic classification of seafloor sediments. In addition to producing high‐resolution images, the calibrated digitally recorded data are processed to estimate surficial reflection coefficients as well as a complete sediment acoustic impulse profile. In this paper, surficial sediments in Narragansett Bay, RI are used to provide ground truth for an acoustic model. Quantitative acoustic returns from the chirpsonar …

Go to article

On The Standing Wave Mode Of Giant Pulsations, K. Takahashi, N. Sato, J. Warnecke, H. Luhr, Harlan E. Spence, Y. Tonegawa Jan 1992

On The Standing Wave Mode Of Giant Pulsations, K. Takahashi, N. Sato, J. Warnecke, H. Luhr, Harlan E. Spence, Y. Tonegawa

Physics & Astronomy

Both odd-mode and even-mode standing wave structures have been proposed for giant pulsations. Unless a conclusion is drawn on the field-aligned mode structure, little progress can be made in understanding the excitation mechanism of giant pulsations. In order to determine the standing wave mode, we have made a systematic survey of magnetic field data from the AMPTE CCE spacecraft and from ground stations located near the geomagnetic foot point of CCE. We selected time intervals when CCE was close to the magnetic equator and also magnetically close to Syowa and stations in Iceland, and when either transverse or compressional Pc …

Go to article

Gamma-Ray Emission From Cygnus-X-1 - Emission Mechanisms And Implications For The Standard Model, A Owens, Mark L. Mcconnell Jan 1992

Gamma-Ray Emission From Cygnus-X-1 - Emission Mechanisms And Implications For The Standard Model, A Owens, Mark L. Mcconnell

Physics & Astronomy

No abstract provided.

Go to article

Seabeam And Seismic Reflection Surveys On The Ontong Java Plateau, Larry A. Mayer, Tom H. Shipley, Edward L. Winterer, David Mosher, Rick A. Hagen Jan 1992

Seabeam And Seismic Reflection Surveys On The Ontong Java Plateau, Larry A. Mayer, Tom H. Shipley, Edward L. Winterer, David Mosher, Rick A. Hagen

Affiliate Scholarship

No abstract provided.

Go to article

Table Of Contents, Volume Three, Number One, Winter 1992, Risk Editorial Board Jan 1992

Table Of Contents, Volume Three, Number One, Winter 1992, Risk Editorial Board

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

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

Go to article

Reply To Valverde, Paul B. Thompson Jan 1992

Reply To Valverde, Paul B. Thompson

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

Professor Thompson responds to Valverde's argument, in the last issue, that his approach to Risk puts too much emphasis on the distinction between Risk subjectivism and Risk objectivism. In doing so, he asserts, inter alia, that anchoring Risk judgments in a probabilistic framework does not go far enough in rejecting reigning Risk-analysis notions of "real Risk."

Go to article