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Articles 1471 - 1500 of 2193
Full-Text Articles in Physical Sciences and Mathematics
Asymptotic Analysis Of The Linearized Navier-Stokes Equations In A Channel, Roger Temam, Xiaoming Wang
Asymptotic Analysis Of The Linearized Navier-Stokes Equations In A Channel, Roger Temam, Xiaoming Wang
Mathematics and Statistics Faculty Research & Creative Works
In this article we study and derive explicit formulas for the boundary layers occurring in the linearized channel flows in the limit of small viscosity. Our study is based on classical boundary layer techniques combined with a new global treatment of the pressure term. © 1995, Khayyam Publishing.
Evaluation Of A Novel Material For Recycling Tires Into Artificial Reefs - Final Report, Richard E. Spieler
Evaluation Of A Novel Material For Recycling Tires Into Artificial Reefs - Final Report, Richard E. Spieler
Marine & Environmental Sciences Faculty Reports
The purpose of this study was to evaluate, from a biological perspective, a tire-concrete aggregate which uses tire shreds mixed into concrete, as a suitable reef building material. Evaluation consisted of comparing the biological assemblages associated with tire-aggregate reefs to standard gravel-concrete reefs of the same design. Four artificial reefs of concrete, tetrahedron modules were placed off Fort Lauderdale, Florida in seven meters of water, two reefs of each type of aggregate. Each reef contains 25 small (1m/side) and 25 large (1.3m/side) tetrahedrons stacked in a random configuration. The reefs were monitored at monthly, or less, intervals for 28 months. …
Tissue Damage In Scleractinian And Alcyonacean Corals Due To Experimental Exposure To Sedimentation, Bernhard Riegl, Jonathan P. Bloomer
Tissue Damage In Scleractinian And Alcyonacean Corals Due To Experimental Exposure To Sedimentation, Bernhard Riegl, Jonathan P. Bloomer
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Four South African scleractinian corals (Favia favus, Favites pentagona, Platygyra daedalea and Gyrosmilia interrupta) and four alcyonacean corals (Lobophytum depressum, Lobophytum venustum, Sinularia dura and Sinularia leptoclados) were experimentally exposed to high sedimentation conditions in the laboratory during a period of six weeks. Experimental sedimentation corresponded to the highest measured sedimentation levels on South African coral reefs, being 200 mg cm-2h-l. Corals were monitored for tissue necroses and bleaching during the course of the experiment and histological sections were prepared after the termination of the experiment. During the experiment, tissue necroses appeared earlier and more frequently in alcyonacea than in …
Is Coral Community Structure Linked To Damage Susceptibility? A Case Study From South Africa, Bernhard Riegl, Peter A. Cook
Is Coral Community Structure Linked To Damage Susceptibility? A Case Study From South Africa, Bernhard Riegl, Peter A. Cook
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
Africa's southernmost coral communities are situated in northern Natal, South Africa (27°50' S), within the Maputaland and St. Lucia Marine Reserves. Growing concern about the possible impact of recreational acti vities on the health of the coral ecosystem prompted the present study on the structure and health of the reefs. Coral community studies by means of line transects identified three basic coral community types, which correlated with the geomorphology of the sandstone outcrops on which corals grew. 1) Fossil dunes were dominated by alcyonacea in depths between 8 and 24 m. 2) Flat outcrops between 18 and 24 m depth …
Spring 1995, Nsu Oceanographic Center
Fall 1995, Nsu Oceanographic Center
Summer 1995, Nsu Oceanographic Center
Winter 1995, Nsu Oceanographic Center
13.1.8. Life History And Management Of The Blue-Winged Teal, James H. Gammonley, Leigh H. Fredrickson
13.1.8. Life History And Management Of The Blue-Winged Teal, James H. Gammonley, Leigh H. Fredrickson
Waterfowl Management Handbook
The blue-winged teal is a small dabbling duck that is common in North America and northern South America. The species is highly mobile and has an opportunistic life history strategy. Breeding populations respond to variable wetland conditions in the drought-prone prairie regions of the north-central United States and southern Canada. Extensive habitat loss and degradation has occurred on the prairies and on neotropical wintering areas in recent decades. Renewed interest in the ecology and management of blue-winged teal has resulted from these environmental pressures. We review life history characteristics of blue-winged teal that are important to managers. Readers should consult …
The Probe, Issue 151 - January/February 1995
The Probe, Issue 151 - January/February 1995
The Probe: Newsletter of the National Animal Damage Control Association
CONTENTS: NADCA Services Directory NADCA Committees Your Treasurer is Happy Assistant Director of DWRC Appointed Calendar of Upcoming Events NADCA Caps Available
Enantiomerically Enriched Α-Methyl Amino Acids. Use Of An Acyclic, Chiral Alanine-Derived Dianion With A High Diastereofacial Bias., David B. Berkowitz, Marianne K. Smith
Enantiomerically Enriched Α-Methyl Amino Acids. Use Of An Acyclic, Chiral Alanine-Derived Dianion With A High Diastereofacial Bias., David B. Berkowitz, Marianne K. Smith
David Berkowitz Publications
Hindered esters derived from N-benzoylalanine and the following chiral alcohols have been synthesized: (1) (−)-isopinocampheol; (2) (−)-trans-2-phenylcyclohexanol and (3) (−)-8-phenylmenthol. Sequential treatment of these esters with LDA (1.2 equiv.) and n-butyllithium (2.4 equiv.) at −78°C in THF generates the corresponding chiral dianions. Alkylation of each of these with benzyl bromide reveals that only the (−)-8-phenylmenthyl auxiliary confers a high diastereofacial bias upon its derivative dianion. In fact, that dianion (6) consistently displays diastereomeric ratios in the range of 89:11 to 94:6 for alkylations with a spectrum of nine alkyl halides. If one recrystallization step is …
Effects Of Track Structure And Cell Inactivation On The Calculation Of Heavy Ion Mutation Rates In Mammalian Cells, Francis Cucinotta, J. W. Wilson, M.R. Shavers, Robert Katz
Effects Of Track Structure And Cell Inactivation On The Calculation Of Heavy Ion Mutation Rates In Mammalian Cells, Francis Cucinotta, J. W. Wilson, M.R. Shavers, Robert Katz
Robert Katz Publications
It has long been suggested that inactivation severely effects the probability of mutation by heavy ions in mammalian cells. Heavy ions have observed cross sections of inactivation that approach and sometimes exceed the geometric size of the cell nucleus in mammalian cells. In the track structure model of Katz the inactivation cross section is found by summing an inactivation probability over all impact parameters from the ion to the sensitive sites within the cell nucleus. The inactivation probability is evaluated using the dose-response of the system to γ-rays and the radial dose of the ions and may be equal to …
Local Heritage In The Changing Tropics: Innovative Strategies For Natural Resource Management And Control, Greg Dicum
Local Heritage In The Changing Tropics: Innovative Strategies For Natural Resource Management And Control, Greg Dicum
Yale School of the Environment Bulletin Series
No abstract provided.
Asymptotic Form Of The Penetration Probability Of The Quantum Harmonic Oscillator Into The Classically Forbidden Region, D. E. Atems
Physics and Astronomy Faculty Research Publications
The penetration probability of the quantum harmonic oscillator into the classically forbidden region is examined in the limit of large quantum numbers using analytical methods. An expression is derived for the asymptotic form of the penetration probability, and is shown to be in good agreement with an earlier result obtained by numerical methods. The asymptotic form of the probability density in the region between the classical turning points is also presented and found to have a simple physical interpretation.
Alpha+28si Cluster Structure As Solitons On The Nuclear Surface, Andrei Ludu
Alpha+28si Cluster Structure As Solitons On The Nuclear Surface, Andrei Ludu
Andrei Ludu
No abstract provided.
Quasimolecular Resonances In Alpha+20ne Systems, Andrei Ludu
Quasimolecular Resonances In Alpha+20ne Systems, Andrei Ludu
Andrei Ludu
No abstract provided.
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
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
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
Local Non-Equilibrium Model For Rapid Solidification Of Undercooled Melts, Sergey Sobolev
Sergey Sobolev
No abstract provided.
Two Temperature Stefan Problem, Sergey Sobolev
Applications Of Extended Thermodynamics ...Part I., Sergey Sobolev
Applications Of Extended Thermodynamics ...Part I., Sergey Sobolev
Sergey Sobolev
No abstract provided.
Applications Of Extended Thermodynamics ...Part Ii., Sergey Sobolev
Applications Of Extended Thermodynamics ...Part Ii., Sergey Sobolev
Sergey Sobolev
No abstract provided.
Disseminatorik. Zur Dekonstruktion Der Techno-Logik, Rudolf Kaehr
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
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
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
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
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
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
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
Ecological Risk Assessment For Chemical Stressors: Challenges In Predictive Ecotoxicology Research, Steven P. Bradbury
Ecological Risk Assessment For Chemical Stressors: Challenges In Predictive Ecotoxicology Research, Steven P. Bradbury
Steven P. Bradbury
Environmental management decisions are increasingly based on the results of ecological risk assessments that require data and models to establish the likelihood of adverse ecological effects that may occur or are occurring as a result of exposure to one or more stressors .. Research to support ecological risk assessments for chemical stressors must include a predictive capability.. The great number of chemicals, species and habitats (exposure conditions) associated with prospective and retrospective management decisions precludes the use of empirical testing as the sole means to fill data gaps .. Therefore, strategic laboratory and field testing must be undertaken in the …