| Comparative Phylogeography of Neotropical Birds |
May-2009 |
134 pages |
| Authors:
Curtis W Burney; LOUISIANA STATE UNIV BATON ROUGE
|
 | Despite the theoretical link between the ecology and the population genetics of species, little empirical evidence is available that corroborates the association. Here, I examined genetic variation in 40 co-distributed species of lowland Neotropical rainforest birds that have populations isolated on either side of the Andes, Amazon River, and Madeira River. I found widely varying levels of genetic divergence among these taxa between the same biogeographic barriers. My investigation of ... |
|
| A Measure of Search Efficiency in a Real World Search Task (PREPRINT) |
16-Feb-2009 |
25 pages |
| Authors:
J G Trafton; Melissa R Beck; Maura C Lohrenz; LOUISIANA STATE UNIV BATON ROUGE
|
| In visual search, preattentive processes locate potential target regions and selective attention is directed to potential target locations. The current experiments examined the role of global visual clutter in participants' ability to deploy attention to target regions containing relatively more or less local clutter. Participants searched maps of high, medium, or low global clutter for a target in a high or low local clutter region. Global and local clutter influenced ... |
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| A Measure of Search Efficiency in a Real World Search Task |
Dec-2008 |
25 pages |
| Authors:
J G Trafton; Melissa R Beck; Maura C Lohrenz; LOUISIANA STATE UNIV BATON ROUGE
|
| In visual search, preattentive processes locate potential target regions and selective attention is directed to potential target locations. The current experiments examined the role of global visual clutter in participants' ability to deploy attention to target regions containing relatively more or less local clutter. Participants searched maps of high, medium, or low global clutter for a target in a high or low local clutter region. Global and local clutter influenced ... |
|
| Research on a Mathematical Framework and Practical Applications of System Architecture |
30-Aug-2008 |
13 pages |
| Authors:
Peter P Chen; LOUISIANA STATE UNIV BATON ROUGE
|
| In this project, we have studied several critical issues of system architecture including: a new mathematical framework and operators of system architecture, practical applications of mathematical framework to new system architecture for the next generation of database/information systems and to profiling problems in anti-terrorism and cyber security. |
|
| Multi-scale Analysis of Heterogeneous Media |
15-Jun-2008 |
|
| Authors:
Robert Lipton; LOUISIANA STATE UNIV BATON ROUGE
|
 | The project develops new mathematical tools for the description of multi-scale stress transfer inside composite materials. The first research activity provides new mathematical methods to characterize the extreme local stress excursions inside linear elastic composite materials. Research in this area has lead to new asymptotic formulations for the local stress excursions across lamina interfaces inside fiber reinforced laminates. New fast computational methods for calculating bounds on the extreme local stress ... |
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| Investigating the Mechanism of Action and the Identification of Breast Carcinogens by Computational Analysis of Female Rodent Carcinogens |
AUG 2006 |
120 pages |
| Authors:
Albert R. Cunningham; LOUISIANA STATE UNIV BATON ROUGE
|
| This project investigated the potential that environmental chemicals may be involved in the etiology of breast cancer. We hypothesized that specific features of chemicals can be identified that are significantly associated with female and breast carcinogens and that these features are related to mechanisms of chemical carcinogenesis. Our overall scientific objective was to investigate the hypothesized relationship between environmental chemicals, xenoestrogens, and the development of breast cancer. With the success ... |
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| Investigating the Mechanisms of Action and the Identification of Breast Carcinogens by Computational Analysis of Female Rodent Carcinogens |
AUG 2005 |
62 pages |
| Authors:
Albert R. Cunningham; LOUISIANA STATE UNIV BATON ROUGE
|
| This project is investigating the potential that environmental chemicals may be involved in the etiology of breast cancer. We hypothesize that specific features of chemicals can be identified that are significantly associated with female and breast carcinogens and that these features are related to mechanisms of chemical carcinogenesis. Our overall scientific objective is to investigate the hypothesized relationship between environmental chemicals, xenoestrogens, and the development of breast cancer. With the ... |
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| Investigating the Mechanisms of Action and the Identification of Breast Carcinogens by Computational Analysis of Female Rodent Carcinogena |
AUG 2004 |
57 pages |
| Authors:
Albert R. Cunningham; LOUISIANA STATE UNIV BATON ROUGE
|
| This project is investigating the potential that environmental estrogens may be involved in the etiology of breast cancer. We hypothesize that specific features of chemicals can be identified that are significantly associated with female and breast carcinogens and that these features are related to mechanisms of chemical carcinogenesis. Our overall scientific objective is to investigate the hypothesized relationship between environmental chemicals, xenoestrogens, and the development of breast cancer. With the ... |
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| Investigating the Mechanisms of Action and the Identification of Breast Carcinogens by Computational Analysis of Female Rodent Carcinogens |
AUG 2003 |
8 pages |
| Authors:
Albert R. Cunningham; LOUISIANA STATE UNIV BATON ROUGE
|
| This project is investigating the potential that environmental estrogens may be involved in the etiology of breast cancer. We hypothesize that specific features of chemicals can be identified that are significantly associated with female and breast carcinogens and that these features are related to mechanisms of chemical carcinogenesis. Our overall scientific objective is to investigate the hypothesized relationship between environmental chemicals, xenoestrogens, and the development of breast cancer. As described ... |
|
| Adaptive Membrane Masks for Next Generation Lithographies |
17 JUN 2003 |
9 pages |
| Authors:
Martin Feldman; LOUISIANA STATE UNIV BATON ROUGE
|
| The overlay accuracy, and hence the minimum useable feature size, in any integrated circuit lithography is often limited by distortions that are present in the mask and wafer. In this work selective heat loads are applied to membrane masks, thereby generating therrnal strains to compensate these distortions. Computer models have been developed that describe these effects, obtaining excellent agreement between a finite element model used at LSU and an analytical ... |
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| High Temperature Materials Simulations on Parallel Computers |
30 APR 2003 |
20 pages |
| Authors:
Priya Vashishta; Rajiv K. Kalia; Aiichiro Nakano; LOUISIANA STATE UNIV BATON ROUGE
|
| Final Progress (1 May 99 - 30 Apr 03): This project deals with properties and processes in high-temperature materials (HTMs) that are vital to the DoD technology base. In this project, molecular-dynamics (MD) simulations have been performed to investigate: i) sintering of nanostructured SiC and high- pressure structural transformation in SiC; ii) dynamic fracture in nanostructured systems; iii) structure of amorphous Al2O3; and iv) reactive wetting of Al2O3 surface by ... |
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| Information Credibility Assessment and Meta Data Modeling in Integrating Heterogeneous Data Sources |
NOV 2002 |
37 pages |
| Authors:
Peter P. Chen; LOUISIANA STATE UNIV BATON ROUGE
|
| This effort identified several key issues and proposes a framework to solve the problem of credibility and validity assessment of information from various data sources for information fusion. This report outlines some of the important steps in a framework for an information validity assessment. The report also describes some algorithms for conflict resolution. The effort also proposes a prototype of a decision-support system to support the estimation of the composite ... |
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| Investigating the Mechanisms of Action and the Identification of Breast Carcinogens by Computational Analysis of Female Rodent Carcinogens |
AUG 2002 |
5 pages |
| Authors:
Albert R. Cunningham; LOUISIANA STATE UNIV BATON ROUGE
|
| This project is investigating the potential that environmental estrogens may be involved in the etiology of breast cancer. We hypothesize that specific features of chemicals can be identified that are significantly associated with female and breast carcinogens and these features are related to mechanisms of chemical carcinogenesis. Our overall scientific objective is to investigate the hypothesized relationship between environmental chemicals, xenoestrogens, and the development of breast cancer. To date we ... |
|
| Dynamic Fracture Mechanisms in Nanostructured and Amorphous Silica Glasses Million-Atom Molecular Dynamics Simulations |
NOV 2001 |
6 pages |
| Authors:
Laurent van Brutzel; Cindy L. Rountree; Rajiv K. Kalia; Aiichiro Nakano; Priya Vashishta; LOUISIANA STATE UNIV BATON ROUGE
|
| Parallel molecular dynamics simulations are performed to investigate dynamic fracture in bulk and nanostructured silica glasses at room temperature and 1000 K. In bulk silica the crack front develops multiple branches and nanoscale pores open up ahead of the crack tip. Pores coalesce and then they merge with the advancing crack-front to cause cleavage fracture. The calculated fracture toughness is in good agreement with experiments. In nanostructured silica the crack-front ... |
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| Military Nutrition Research |
JUL 2001 |
286 pages |
| Authors:
Donna Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| To assess, maintain, or improve a soldier's physical/physiological/ psychological capability to function effectively under environmental and operational stress and to minimize adverse effects of stress on health safety and performance, the PBRC performs the following eight research tasks: (1) Clinical Laboratory for Human and Food Samples performs laboratory analysis of samples from studies conducted by the U.S. Army Research Institute of Environmental Medicine (USARIEM) and at PBRC in Tasks 4 ... |
|
| Robust System Identification and Control Design |
30 JAN 2001 |
13 pages |
| Authors:
Kemin Zhou; Guoxiang Gu; LOUISIANA STATE UNIV BATON ROUGE
|
| In this research project, we have made significant progress in several fronts of modem control technology. Our major research results include: new model identification and validation techniques, new model uncertainty and robustness characterization methods using probabilistic approach, randomized control analysis and design methods, some advanced nonlinear control techniques including bifurcation stabilization and compressor stabilization techniques, model reduction techniques, fault detection and fault tolerant control methods, and several robust stability analysis ... |
|
| Military Nutrition |
JUL 2000 |
152 pages |
| Authors:
Donna H. Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| To assess, maintain, or improve a soldier's physical/physiological/ psychological capability to function effectively under environmental and operational stress and to minimize adverse effects of stress on health safety and performance, the PBRC performs the following eight research tasks: 1) Clinical Laboratory for Human and Food Samples performs laboratory analysis of samples from studies conducted by the U.S. Army Research Institute of Environmental Medicine ... |
|
| The International Conference on Multiscale Materials Phenomena in Harsh Environments (1st) Held in Limassol, Cyprus on 19-24 June 2000 |
24 JUN 2000 |
39 pages |
| Authors:
Rajiv K. Kalia; Aiichiro Nakano; Panos Razis; Priya Vashishta; George Voyiadjis; LOUISIANA STATE UNIV BATON ROUGE
|
|
| International Conference (1st) on Multiscale Materials Phenomena in Harsh Environments Held in Limassol, Cyprus on June 19-24, 2000 |
JUN 2000 |
|
| Authors:
Rajiv K. Kalia; Aiichiro Nakano; Panos Razis; Priya Vashishta; George Voyiadjis; LOUISIANA STATE UNIV BATON ROUGE
|
|
| Determination of Total Daily Energy Requirements and Activity Patterns of Service Women |
OCT 1999 |
27 pages |
| Authors:
James P. Delaney; LOUISIANA STATE UNIV BATON ROUGE
|
| The objective of the current study is to define a range of energy requirements of servicewomen, defining the variation as it relates to jobs, military settings, and activity patterns. This is crucial information needed not only for determination of nutritional requirements for energy balance, but specific nutrient density standards for servicewomen. Total daily energy expenditure is measured using the doubly labeled water (DLW) method. Activity ... |
|
| Military Nutrition Research |
JUL 1999 |
180 pages |
| Authors:
Donna Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| The goal of this research is to assess, maintain, or improve a soldier's physical physiological/psychological capability to function effectively under environmental and operational stress and to minimize adverse effects of stress on health, safety and performance. |
|
| An Experimental Investigation of the Influence of Diesel Fuel on the Food Webs of Two Sedimentary Communities/Direct and Indirect Effects of Diesel Fuel on Microphyto Benthos and Meiofauna in Sa |
30 OCT 1998 |
5 pages |
| Authors:
Kevin R. Carman; John W. Fleeger; Thomas Bianchi; LOUISIANA STATE UNIV BATON ROUGE
|
| The influence of diesel fuel on benthic food webs in coastal salt marshes were examined in a series of microcosm experiments. Diesel contamination resulted in high mortality to all copepods except Cletocamptus deitersi, while nematode abundance increased. Blooms of benthic microalgae that developed in contaminated sediment were primarily a response to reduced copepod grazing, and secondarily a consequence of enhanced NH4+ flux from sediments. Microalgal ... |
|
| Military Nutrition Research: Eight Tasks to Address Medical Factors Limiting Soldier Effectiveness |
JUL 1998 |
156 pages |
| Authors:
Donna H. Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| To assess, maintain, or improve a soldier's physical/physical/ physiological/psychological capability to function effectively under environmental and operational stress and to minimize adverse effects of stress on health safety and performance, the PBRC will perform the following eight research tasks: (1) Clinical Laboratory for Human and Food Samples will perform laboratory analysis of samples from studies conducted by the U.S. Army Research Institute of Environmental Medicine (USARIEM) and at PBRC in ... |
|
| Military Nutrition Research: Six Tasks to Address Medical Factors Limiting Soldier Effectiveness |
JUN 1998 |
81 pages |
| Authors:
Donna H. Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| To assess, maintain or improve a soldier's physical/ physiological/ psychological capability to function effectively under environmental and emotional stress and to minimize adverse effects of stress on health, safety and performance, the Pennington Biomedical Research Center (PBRC) performed the following six research tasks: 1) The Clinical Laboratory for Human and Food Samples performed laboratory analyses of samples from studies conducted by the U.S. Army Research ... |
|
| Alignment System for Anorad X-Ray Exposure Tool |
15 JAN 1998 |
10 pages |
| Authors:
Martin Feldman; LOUISIANA STATE UNIV BATON ROUGE
|
| An X-ray exposure tool has been completed, based on a commercially available stage system. All of the individual functions, including mask and wafer loading, coarse and fine alignment, and exposure, have been demonstrated. The development of a user friendly software package to control the sequence of operations is continuing. In addition, an interferometer has been developed which performs absolute distance measurements with nanometer resolution. By switching between several optical fibers ... |
|
| Mixing and Combustion in Vortex Dominated Combustors with Distributed Air- and Fuel-Injection |
1998 |
48 pages |
| Authors:
Sumaanta Acharya; Michael Murphy; LOUISIANA STATE UNIV BATON ROUGE
|
| Measurements of temperature, velocity and emissions were performed in two trapped vortex combustor configurations, and several strategies for improving key performance metrics (e.g., circumferential uniformity in temperature and NOx emissions) were examined. The measurements show that introducing swirl with the primary cavity air reduces NOx emissions, extends the Lean Blow Out (LBO) limit and decreases circumferential non- uniformity in the temperature. With the inner-cavity configuration, LBO values as low as ... |
|
| Military Nutrition Research: Six Tasks to Address Medical Factors Limiting Soldier Effectiveness |
APR 97 |
102 pages |
| Authors:
Donna H. Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| To assess, maintain, or improve a soldier's physical/physiological/ psychological capability to function effectively under environmental and operational stress and to minimize adverse effects of stress on health safety and performance, the Pennington Biomedical Research Center (PBRC) performs the following six research tasks: (1) The Clinical Laboratory for Human and Food Samples performs laboratory analysis of samples from studies conducted by the U. S. Army Research Institute of Environmental Medicine (USARIEM). ... |
|
| Effects of Pressure on Membrane-Associated Receptors and Effector Elements |
30 NOV 93 |
2 pages |
| Authors:
Joseph F. Siebenaller; LOUISIANA STATE UNIV BATON ROUGE
|
| To identify the effects of moderate hydrostatic pressure on receptor and effector elements involved in transmembrane signal transduction, we examined the A1 adenosine receptor - inhibitory G protein (G) - adenylylcyclase signal transduction complex. Our experiments were designed to identify and define at the molecular level pressure effects on system components in isolation and on the entire functional complex. |
|
| Space Marching Calculations about Configurations Using a Solution-Adaptive Algorithm. |
OCT 1993 |
|
| Authors:
A. D. Harvey; S. Acharya; S. L. Lawrence; LOUISIANA STATE UNIV BATON ROUGE
|
| A solution-adaptive marching algorithm is developed and applied to a three-dimensional parabolized Navier-Stokes equation solver. The resulting algorithm obtains accurate solutions by using a spatial-marching/adaptive-grid procedure. The adaptation step redistributes grid points line by line in both crossflow directions, with grid point motion controlled by forces analogous to tensional and torsional spring forces with the tensional force proportional to the error measure or weighting functions. The solution-adaptive marching procedure is ... |
|
| Denitrification in Bottomland Hardwood Soils of the Cache River, Arkansas |
SEP 93 |
36 pages |
| Authors:
R. R. Boar; R. D. DeLaune; C. W. Lindau; W. H. Patrick Jr; LOUISIANA STATE UNIV BATON ROUGE
|
| To give initial nitrate-N concentrations of about 9 mg L-1, 15N labeled nitrate was added to sediment-water columns containing wetland sediment and river water. Over 40 days, nitrate-N in floodwater decreased by between 82 and 59 percent, which gave estimates of N export from the water column of 11.5 mg N m-2 day -1 and 7.5 mg N m-2 day-1. These values are low compared with wetland systems elsewhere and ... |
|
| Military Nutrition Research: Six Tasks to Address Medical Factors Limiting Soldier Effectiveness |
30 APR 93 |
35 pages |
| Authors:
Donna H. Ryan; LOUISIANA STATE UNIV BATON ROUGE
|
| To assess, maintain, or improve a soldier's physical/physiological/ psychological capability to function effectively under environmental and operational stress and to minimize adverse effects of stress on health safety and performance, the Pennington Biomedical Research Center performs the following six research tasks: (1) Clinical Laboratory for Human and Food Samples, (2) Stable Isotope Laboratory, (3) Nutritional Neuroscience Laboratory (4) Nutritional Neuroscience Clinical Studies, (5) Menu Modification, and (6) Metabolic Unit Project. ... |
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| Overall Damage and Elastoplastic Deformation in Fibrous Metal Matrix Composites. |
1993 |
|
| Authors:
Peter I. Kattan; George Z. Voyiadjis; LOUISIANA STATE UNIV BATON ROUGE
|
| This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, analytical, cr mmc, mmc materials and material types:, fibers material characteristics and data fields:, debonding, deformations, ductility, effective stress, elastoplastic deformations, elastoplasticity, hardening, kinematic hardening, strain rate tensors testing and test conditions:, damage analysis manufacturing:, delaminations miscellaneous and special technical terms:, afosr, afosr-90-0227 grants, damage models, damage transformations, dvorkak and bahei-el-din ... |
|
| Preventive Veterinary Medicine. Applications of Remote Sensing to Epidemiology and Parasitology. Special Issue |
DEC 91 |
|
| Authors:
Martin Hugh-Jones; LOUISIANA STATE UNIV BATON ROUGE
|
| This brief paper reviews some basic results of almost 100 scientific papers produced in the 1970-1976 time period by the staff and contractors of the Health Applications Office, Johnson Space Center, Houston, TX. These papers were primarily concerned with the use of sensor data collected from satellites and aircraft for environmental analysis, and ultimately for application to human and animal health. Comment is made on early problem solving, instrumentation development, ... |
|
| The Interplanetary Heavy Ion Environment for Both Galactic Cosmic Rays and Solar Energetic Particles during the CRRES Mission |
18 OCT 91 |
90 pages |
| Authors:
John P. Wefel; T. G. Guzik; LOUISIANA STATE UNIV BATON ROUGE
|
| A calculational model of the Interplanetary Heavy Ion Environment is being developed for the CRRES mission to include both galactic cosmic rays (GCR) and solar energetic particles (SEP). Data from the ONR-604 experiment on CRRES plus results from other experiments/spacecraft are being combined to evaluate the heavy ion radiation environment in near-Earth space in the 1990-1991 epoch. The modeling effort is described along with operation and performance of the ONR-604 ... |
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| Nonlinear Real-Time Signal Processing |
01 JUN 90 |
|
| Authors:
William A. Porter; LOUISIANA STATE UNIV BATON ROUGE
|
| The grant supported in part a research effort in Nonlinear Real-Time Signal Processing. The effort was composed of three interacting lines of development: advances in array processing, advances in fast algorithmic forms, applications of the above to polynomic and m-D signal processing algorithms. (rh) |
|
| Military Hydrology. Report 14. Breach Erosion of Earth-Fill Dams and Flood Routing (BEED) Model |
AUG 89 |
|
| Authors:
Vijay P. Singh; Panagiotis D. Scarlatos; LOUISIANA STATE UNIV BATON ROUGE
|
| A computer model has been developed for computer ized simulation of breach erosion of earth-fill dams (BEED). The model incorporates the processes of surface erosion and slope sloughing to stimulate breach enlargement. Depletion of reservoir water is approximated by a volume continuity equation, while broad-crested weir hydraulics is used to describe flow over and through the breach. Due to the implicit form of these equations, an iterative solution is proposed ... |
|
| A Hybrid Architecture for Feature Labelling of Oceanographic Satellite Images |
MAY 89 |
|
| Authors:
S. S. Iyengar; LOUISIANA STATE UNIV BATON ROUGE
|
| The objective of this project is to develop an automatic oceanographic image interpretation system. This system will aid the operator in identifying various oceanic features and will predict the dynamic behavior of these features. Presently these tasks are handled by experts in oceanography and obviously, a time consuming process. The proposed project has been divided into three phases: In Phase I the features present in the oceanographic image are identified. ... |
|
| Research Plan for the Investigation of Cultural Resources in the Area of the Proposed Violet Site Alternative. New Lock and Connecting Channels, St. Bernard Parish, Louisiana |
17 MAR 89 |
98 pages |
| Authors:
Malcolm K. Shuman; L. Nakashima; J. Mossa; H. Franks; Kenneth Jones; LOUISIANA STATE UNIV BATON ROUGE
|
| This report describes story, history geomorphology of a wetlands area between the Mississippi River and Lake borgne in St. Bernard Parish, Louisiana. Known cultural resources of this area are enumerated and evaluated and a plan is presented for the discovery and investigation of heretofore unknown cultural resources in the project area. |
|
| Generalizations of the Neumann System: A Curve Theoretical Approach. Part 2 |
89 |
|
| Authors:
R. J. Schilling; LOUISIANA STATE UNIV BATON ROUGE
|
|
| Faint Photoelectric Photometric Standard Star Sequences |
15 JUL 88 |
|
| Authors:
Arlo Landolt; LOUISIANA STATE UNIV BATON ROUGE
|
| The primary purpose of the research funded via AFOSR Grant No. 82- 0192 was to establish highly accurate standard stars covering a wide range both in brightness and color around the celestial sphere. The availability of such standard stars would enable anyone to determine the brightness or color of any object projected against the sky from land, the air, or in space. Other secondary projects also were undertaken as circumstances ... |
|
| Clusters of Transition Metal Atoms |
JAN 88 |
|
| Authors:
J. Gallaway; LOUISIANA STATE UNIV BATON ROUGE
|
| The primary objective of developing improved techniques for calculating the electronic structure of clusters on the basis of density functional theory was accomplished. The methods are the most accurate presently available. The most important topic which is not yet treated satisfactorily in our approach or in any of the competing methods is that of embedding the cluster, i.e., treating its environment properly. New results were obtained for several interesting systems. ... |
|
| Lower Mississippi River Environmental Program. Report 8. Ecological Features of Eddies Associated with Revetments in the Lower Mississippi River |
JAN 88 |
|
| Authors:
Steven P. Zimpfer; William E. Kelso; C. F. Bryan; C. H. Pennington; LOUISIANA STATE UNIV BATON ROUGE
|
| A study was conducted from late April through mid- July 1985 to evaluate habitat quality of revetment eddies in the Lower Mississippi River. Sites were established at three locations: river miles 372 (Natchez, Mississippi), 192 (White Castle, Louisiana), and 35 (Port Sulphur, Louisiana). At White Castle, samples were taken a 3-week intervals throughout the study. The Port Sulphur and Natchez sites were visited once in large May/early June. The White ... |
|
| Relaxations in Spin Glasses: Similarities and Differences from Ordinary Glasses |
15 MAR 1984 |
|
| Authors:
K. L. Ngai; A. K. Rajagopal; C. Y. Huang; LOUISIANA STATE UNIV BATON ROUGE
|
|
| Creep Crack-Opening Displacement Measurements in In-100 at 732 C |
MAR 1983 |
|
| Authors:
William N. Sharpe Jr; LOUISIANA STATE UNIV BATON ROUGE
|
| Creep crack-opening displacement was measured at 732 C (1350 F) using an interference displacement gage and a minicomputer based analysis system to calculate compliance and provide realtime control and analysis. The system, based on a HeNe laser interferometer, was used to measure creep crack growth in IN-100, a nickel-based superalloy. (Author) |
|
| Paleontological Investigations in the Vicinity of Montgomery Landing, Red River Waterway |
23 DEC 1982 |
|
| Authors:
Judith A. Schiebout; Willem van den Bold; LOUISIANA STATE UNIV BATON ROUGE
|
| Field work at Montgomery Landing took place between August, 1979 and August, 1980, and consisted of collecting 138 samples at 2 kg each, spaced at 30 cm intervals along ten selected section lines. In addition, several large bulk samples were taken and the anterior third part of a toothed whale was recovered. Paleontological investigation of the samples includes the study of nannofossils, foraminifera, ostracodes, corals, bryozoa, mollusks, crabs, echinoderms, otoliths ... |
|
| Turbulence Measurements in an Ejector Wing Flow Field, |
JUN 1982 |
|
| Authors:
G. D. Catalano; H. E. Wright; D. Stevens; K. S. Nagaraja; LOUISIANA STATE UNIV BATON ROUGE
|
| An experimental investigation of the resultant turbulent flow field about an ejector wing design incorporating a constant area mixing duct is made. Mean velocities and turbulent intensities are calculated from the photon correlation functions. Comparison between the ejector powered and non-powered cases are made. Qualitative information as well is obtained from a flow visualization technique. The following results are obtained. (1) The ejector consistently accelerated the flow field above the ... |
|
| Diffusion of Sediment on the Lee of Dune-Like Bedforms: Theoretical and Numerical Analysis |
AUG 1981 |
|
| Authors:
Chinmoy Chakrabarti; Donald R. Lowe; LOUISIANA STATE UNIV BATON ROUGE
|
| Theoretical and empirical analyses of flow structure, sediment transport, and sediment size characteristics at the crest of dune-like bedforms indicate that it is possible to describe, at least semi-quantitatively, the diffusion and deposition of sediment on the leeside of such structures. A numerical program based on this analysis simulates the grain-size distribution and deposition rate on the leeside of dunes for specified flow conditions and bed material. Evaluation of flow ... |
|
| Coastal Barrier Changes, 1770-1867, Biscayne Bay Area, Florida |
JUN 1978 |
|
| Authors:
Roland E. Chardon; LOUISIANA STATE UNIV BATON ROUGE
|
| Examination of properly evaluated historical maps of the preurban (that is, 1770 to 1867) sedimentary barrier bordering northern Biscayne Bay in southeastern Florida indicates (1) net shore retreat averaging about 3.0 m/yr in the northern Atlantic portion of the barrier; (2) net spit accretion in two areas to the south, the first averaging about 70 m/yr and the second adding about 1,000,000 sq m to the barrier; (3) the migration ... |
|
| Common Marsh Plant Species of the Gulf Coast Area. Volume II. Growth Dynamics. |
DEC 1977 |
|
| Authors:
James G. Gosselink; Charles S. Hopkinson Jr.; Roland T. Parrondo; LOUISIANA STATE UNIV BATON ROUGE
|
| As part of the U. S. Army Corps of Engineers Dredged Material Research Program, a study of the growth physiology of marsh plants common to the Gulf Coast area was conducted. The growth physiology study, concerned with the physiological ecology of stress, reports on several experiments on the ability of marsh plants to survive, particularly under stresses of salinity and inundation. Although several species are investigated, including Distichlis spicata, Juncus ... |
|
| Common Marsh Plant Species of the Gulf Coast Area. Volume I. Productivity. |
DEC 1977 |
|
| Authors:
James G. Gosselink; Roland T. Parrondo; Charles S. Hopkinson Jr; LOUISIANA STATE UNIV BATON ROUGE
|
| As part of the U. S. Army Corps of Engineers Dredged Material Research Program, a study of the productivity of marsh plants common to the Gulf Coast area was conducted. The study reports on the productivity of seven marsh plant species in coastal marshes of Louisiana. The Wiegert-Evans harvest technique was used to measure productivity over a two-year period of the following species: Distichlis spicata (salt grass), Juncus roemerianus (black ... |
|
Reports by Corporate Author
