Digital Commons Network^™

The Diet And Feeding Habits Of The Southern Stingray, Dasyatis Americana, In Tropical Shallow Marine Habitats, David S. Gilliam

HCNSO Student Theses and Dissertations

The diet and feeding habits of the southern stingray, Dasyatis americana, were investigated through aerial surveys, land-based observations, and quantitative analysis of stomach contents. The field research was conducted in the Exuma Cays Land and Sea Park, central Bahamas. Systematic aerial surveys and the land-based observations were made to determine population density and feeding periodicity in terms of time or tidal phase. In August, 1989, systematic surveys were flown over two cays in the Park; a 12 km² area around Waderick Wells Cay and a 21km² area around Shroud Cay. Both survey areas were flown three times …

The Pangaean Megamonsoon- Evidence From The Upper Triassic Chinle Formation, Colorado Plateau, Russell F. Dubiel, Judith Totman Parrish, J. Michael Parrish, Steven C. Good

United States Geological Survey: Staff Publications

The Upper Triassic Chinle Formation was deposited at an exceptional time in Earth's paleogeographic and paleoclimatic history. During the Triassic, the supercontinent Pangaea was at its greatest size, in terms of both aggregated continental crust and exposed land area. Moreover, the exposed land was divided symmetrically about the paleoequator between the northern and south- ern hemispheres. These conditions were ideal for maximizing monsoonal circulation, as predicted from paleoclimate models. The Chinle was deposited between about 5° to 15° N paleolatitude in the western equatorial region of Pangaea, a key area for documenting the effects of the monsoonal climate. This study …

Intelligent Structural Operators For The K-Way Graph Partitioning Problem, Gregor Von Laszewski

Northeast Parallel Architecture Center

A parallel genetic algorithm for the graph partitioning problem is presented, which combines general heuristic algorithms with techniques that are described in evolution theory. In the parallel genetic algorithm the selection of a mate is restricted to a local neighborhood. In addition, the parallel genetic algorithm executes an adaptation step after an individual is generated, with the genetic operators crossover and mutation. During the adaptation step the solution is improved by a common algorithm. Another selection step decides if the adapted descendant should replace the parent individual. Instead of using a uniform crossover operator a more intelligent crossover operator, which …

Early Eocene Biotic And Climatic Change In Interior Western North America, Scott L. Wing, Thomas M. Bown, John D. Obradovich

United States Geological Survey: Staff Publications

Imprecise correlation of the marine and terrestrial fossil records has been a major obstacle to understanding migration and extinction of continental biotas and early Cenozoic climate change

Determination Of Morphologic And Volumetric Change, Peyto Glacier, Alberta, 1966-1989, Peter J. Glenday

Theses and Dissertations (Comprehensive)

During the summer months of July and August 1989, approximately 23 years after a photogrammetric survey on August 22, 1966, Peyto Glacier, a glacier selected for study during the International Hydrologic Decade (IHD) 1965-74, was re-surveyed using terrestrial geodetic surveying techniques. The volumetric and morphologic change of Peyto Glacier, Alberta from 1966 to 1989 is estimated through a combined application of digital cartometry, digital geodetic survey and Triangulated Irregular Network (TIN) digital terrain modeling and analysis. Changes in glacial volume, areal extent, teriminus position, percentage basin glaciation, slope, and aspect for the 23 year interval are shown. Additionally, a 1:10000 …

Integration Of Abductive And Deductive Inference Diagnosis Model And Its Application In Intelligent Tutoring System, Jingying Zhang

Computer Science Theses & Dissertations

This dissertation presents a diagnosis model, Integration of Abductive and Deductive Inference diagnosis model (IADI), in the light of the cognitive processes of human diagnosticians. In contrast with other diagnosis models, that are based on enumerating, tracking and classifying approaches, the IADI diagnosis model relies on different inferences to solve the diagnosis problems. Studies on a human diagnosticians' process show that a diagnosis process actually is a hypothesizing process followed by a verification process. The IADI diagnosis model integrates abduction and deduction to simulate these processes. The abductive inference captures the plausible features of this hypothesizing process while the deductive …

Glacial Deposits, Vol. 19, 1990-1991, Department Of Geography-Geology

Glacial Deposits

Newsletter of the Department of Geography-Geology

Voronoi Diagrams In A River, Kokichi Sugihara

Department of Computer Science Technical Reports

No abstract provided.

Radon Contamination Of Residences In A City Built Upon A Karst Landscape Bowling Green, Warren County, Kentucky, James William Webster

Masters Theses & Specialist Projects

The United States Environmental Protection Agency (EPA) estimates that 8 to 12% of U.S. homes have radon concentrations that equal or exceed 4 picocuries per liter (pCi/l). A statewide screening of Kentucky by EPA resulted in an average residential radon concentration of 2.8 pCi/l with 17% of the homes at or above 4 pCi/l. EPA requires routine monitoring and maintenance or worker health records in mines and caves having radon daughter concentrations at or above 0.30 working levels (WL).

Bowling Green is a city located in a karst region of south central Kentucky. Residents of Bowling Green have been subjected …

Mark Merlin's Review Of John L. Culliney's Islands In A Far Sea: Nature And Man In Hawaii., Mark Merlin

Pacific Studies

No abstract provided.

Ua66 1989-1990 Annual Report, Wku Ogden College Of Science & Engineering

WKU Administration Documents

Annual report created by then Ogden College of Science, Technology and Health which highlights students, faculty, alumni, international activities, facilities and equipment and departments:

• Agriculture
• Allied Health
• Biology
• Chemistry
• Computer Science
• Engineering Technology
• Geography & Geology
• Health & Safety
• Industrial Technology
• Mathematics
• Nursing
• Physics & Astronomy

Earth News, Fall 1990, Department Of Earth Science, University Of Northern Iowa.

Earth News

Inside this issue:

--- Year in Review
--- Faculty News
--- Department of Earth Science Seminar Series Spring/Fall 1990
--- UNI Astronomy Programs Continue to Serve the Public
--- UNI Student Accepted as LPI Intern
--- Earth Science Update
--- Department of Earth Science Recognition Dinner April 29, 1990
--- Latham Hall Scrapbook
--- News from Alumni
--- Seasons Greetings from the Department of Earth Science

Hawaii's Hottest Issue: Update On Geothermal Development, Paul Faulstich

Pitzer Faculty Publications and Research

Walking through Hawai'i's Wao Kele O Puna rainforest, you can hear the coarse volcanic soil crunch underfoot. A surrealistic calm lingers in the thick air while songbirds call out from the understory. Yet this is a forest under siege.

Geothermal developers want to tap the volcanic heat beneath the Wao Kele O Puna forest and use it to make electricity and profits.

Malaysian Deforestation Proceeds Apace, Paul Faulstich

Pitzer Faculty Publications and Research

A hunger fast, dubbed Fast Action, was staged in front of the Japanese Consulate General in Honolulu on July 20 to protest the destruction of the most ancient and biologically diverse ecosystem on Earth. Organized by Hawai'i Earth First! and the O'ahu Rainforest Action Group, Fast Action was designed to alert people to the destruction of tropical rainforests in Sarawak, Malaysia. Protesters demanded on immediate moratorium on the cutting of rainforests in,which the Penan and other-native peoples live.

Recent Secular Variations In The Extent Of Northern Hemisphere Snow Cover, David A. Robinson, Kenneth F. Dewey

Department of Earth and Atmospheric Sciences: Faculty Publications

Northern hemisphere snow cover during 1988 and 1989 was at its lowest extent since the advent of reliable satellite snow-cover monitoring 1972; running some 8-10% below the eighteen-year annual mean of 25.7 million km² . Monthly minima for the period of record occurred six times during these two years. In general, the last nine years of the satellite record had less extensive cover than the 1972-80 interval. Negative anomalies during the 1980s were largest over Eurasia in all seasons, and in the Spring over North America. Hemispheric seasonal means for the most recent nine years were 3.7% to 8.4% …

Factors Affecting Wood Fuel Consumption And Environmental Impacts In Warren County, Kentucky, Barry Vann

Masters Theses & Specialist Projects

The purpose of this research is to identify factors that contribute to wood fuel consumption as a space heating source and estimate a county-wide proportion for wood fuel consuming households. In addition, environmental problems associated with deforestation such as erosion and loss of wildlife habitat are delineated; moreover, air pollution resulting from wood fuel emissions are discussed.

An exhaustive literature review provided the basis for the study. Data on Warren County wood fuel consumption patterns were derived from a mail survey. Proportion estimates were tested by using a classical two-tail test of hypothesis. Subsequently, factors were identified and used in …

Ua66/7/3 Coal & Fuel Characterization Laboratory: The First Ten Years, Wku Chemistry

WKU Administration Documents

Report of work completed in the first ten years of the Coal & Fuel Characterization Laboratory.

Indices, Editorial Advisory Board, Ascii Text Files, Risk Editorial Board

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

[Excerpt] "An unindexed journal is of little use over the long haul, and many libraries will not subscribe to it. [Of course, we plan to include at least an author and title index in the next issue, but that doesn't count.] Therefore, we were pleased to learn that Risk has been approved by the Indexing Periodical Literature Advisory Committee [One of the few which may not need nonexpert members!] of the American Association of Law Libraries. This means, for example, that Risk will be included in the Current Law Index, Legaltrac, and Legal Resources Index published by Information Access Company."

Irrigation Management Considering Soil Variability And Climatic Uncertainty, Dani Or

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The increase in multipurpose use of water resources, dwindling xii water supplies, and a decline in the economic viability of many agricultural operations make efficient irrigation management imperative. Soil variability and climatic uncertainty are major obstacles to efficient irrigation management due to a lack of reliable information for decision making. This study was aimed at identifying sources of uncertainty and examining methods for reducing the effects of uncertainty on irrigation scheduling schemes.

A method for spatial-temporal estimation that combines spatial information from few measurements with a physically based model of the system dynamics is proposed. The spatial phase of the …

The Annual Meeting Of The Iowa Academy Of Science April 20-21, 1990 [Program, 102nd Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 5
General Session Speakers --- 9
Awards --- 12
Distinguished Fellow --- 12
Distinguished Service --- 13, 14
Symposia Programs --- 15
Poster Session --- 17
Campus Map --- Centerfold
Section Programs --- 22
Agricultural Sciences --- 22
Anthropology --- 25
Botany --- 26
Cellular & Molecular Biology --- 28
Chemistry, Inorganic --- 30
Chemistry, Organic --- 34
Conservation --- 37
Earth Science Teaching --- 39
Elementary Science Teaching --- 40
Engineering --- 42
Geology --- 47
Linguistics --- 48
Nursing --- 49
Physics --- 50
Physiology --- 53
Psychology --- 54
Science Teaching --- 56 …

Geology, Volcanology, And Petrology Of Cerro Bravo, A Young, Dactic, Stratovolcano In West-Central Colombia, David Tondl Lescinsky

LSU Historical Dissertations and Theses

The northernmost active Andean volcano, Cerro Bravo is a small, young, and very explosive stratovolcano. Cerro Bravo has produced voluminous tephra deposits, that are found> 30 km away, as well as, pumice flow deposits, block and ash flow deposits, and high-aspect lava flows, which are found proximally to the volcano. There have been eight episodes of activity during the past 6250±110 years (Herd, 1982), with the most recent <200 years ago and the present being a period of quiescence with no visible activity or thermal manifestations. Stratigraphic relationships suggest the occurrence of an initial explosive phase and a concluding effusive phase of activity during individual episodes. The products of volcanic activity at Cerro Bravo are a chemically and mineralogically monotonous suite of medium-K dacite and high-silica andesite (59.2- 67.5% SiO₂ pumices and lavas. The dominant phenocrysts present are plagioclase and hornblende (oxyhomblende in lavas) with lesser quantities of orthopyroxene, titanomagnetite, and rare augite and biotite also present. Petrology and eruption dynamics …

A “Drastic” Evaluation Of The Ground-Water Pollution Potential Of Karst Terrain: Lost River Ground-Water Basin, Warren County, Kentucky, David Baize

Masters Theses & Specialist Projects

Karst terrains, such as the Lost River Karst Ground-Water Basin, are extremely vulnerable to ground-water contamination. Seven physical factors: depth to water, recharge, aquifer media, soil media, topography, impact of the vadose zone, and hydraulic conductivity, are evaluated using the DRASTIC system to determine the ground-water pollution potential of the study area. A numerical value is calculated for each of the seven factors, and a map layer for each factor is produced. These layers are then “added” together to produce a DRASTIC ground-water pollution potential map. The effectiveness of each factor in evaluating the pollution potential of karst terrain is …

Water Current, Volume 22, April 1990

Water Current Newsletter

Environmental Studies Part of Geography Department, Jeanne Kay
Twentieth Annual Earth Day Observed April 22
NATO Advanced Research Workshop to be Held at UNL in September
First Irrigation Day Held February 22
Just Give Us a Call for Water Seminar Proceedings
Festival Highlights Importance of Nebraska's Groundwater
Prevention Key to Pollution
Assessment Atlas Now Available
Water Conference Council Awards
Agency Cooperation Urged at Water Conference
90s Exciting Times in Water Resources
Nebraska Counties Included in High Plains Irrigation Research
Mid-Nebraska Water Quality Demo Project Combines State and Federal Agencies to Research Irrigation Efficiency
Irrigation Bolsters Nebraska's Economy
First Nebraska Instream …

Edward Miles's Review Of Hanns J. Buchholz's Law Of The Sea Zones In The Pacific Ocean, Edward Miles

Pacific Studies

No abstract provided.

Disparities In Development: A Case Study Of Karnataka State (India)., Jayalaxmi Jayaram Dr.

Doctoral Theses

The Five Year Plans have recognised the need to bridge the developmental disparities across the regions and have formulated strategies for accelerated development of backward are as. However, the widening disparities between a few highly developed centres and vast areas of under development only bring out the inadequacies of the plans which are yet to integrate the resources of a region to its people. This study is an attempt to understand the spatial processes and patterns of development which offer an explanation to the intra/inter-regional contrasts in development. The study while high-lighting the importance of the Spatial approach has, in …

Kentucky Pride Hay Growers Association — After One Year, Mark Mattingly

Kentucky Alfalfa and Stored Forage Conference

High quality forages have been the "frontline" for successful horse and cattle operations for years. In Kentucky, we have grown, harvested and stored hay on the farm for as long as we have farmed. It is one of our principal forms of overwinter feed and has been grown primarily as an on-the-farm feed source.

Biozonation Of Deep-Water Lithoherms And Associated Hardgrounds In The Northeastern Straits Of Florida, Charles G. Messing, A. Conrad Neumann, Judith C. Lang

Marine & Environmental Sciences Faculty Articles

Elongated carbonate mounds ("lithoherms") oriented parallel to prevailing northerly bottom currents at moderate depths (500-700 m) along the western margin of the Little Bahama Bank exhibit a consistent faunal zonation characterized by attached, suspension-feeding invertebrates. The four most abundant macroepibenthic groups (alcyonarians, crinoids, sponges and stylasterid hydrocorals) dominate all hard substrates examined except upcurrent ends and crests of lithoherms. We recognize three faunal zones on these mounds: a Coral Zone (Lophelia prolifera) restricted to the upcurrent end; a Zoanthid Zone (?Gerardia sp.) along upcurrent crests, and a Crinoid/Alcyonarian Zone along lithoherm flanks and downstream crests. Taxa characteristic of the latter …

Pioneers Of Modern Geography: Translations Pertaining To German Geographers Of The Late Nineteenth And Early Twentieth Centuries, Robert C. West

GreyZone

This collection of English translations samples the writings and/or critiques thereon of six important German geographers of the late nineteenth and early twentieth centuries: those of August Meitzen, Eduard Hahn, Otto Schliiter, Alfred Hettner, Siegfried Passarge, and Karl Sapper. Each of these scholars influenced in various ways the course of modem geographical thinking and instruction in German universities, and their methodologies were also adopted in part by professional geographers in other European countries and in the United States. Four of them—Hahn, Schliiter, Hettner and Passarge— were students of Ferdinand von Richthofen, often considered the “father” of professional geography in Germany. …

Bibliography Of The Natural And Cultural History Of The Loess Hills Of Iowa, Dean M. Roosa, Darwin D. Koenig

Journal of the Iowa Academy of Science: JIAS

A bibliography of literature on Iowa's Loess Hills includes references containing information on the cultural or natural history of chis western Iowa landform region. The bibliography is divided into six parts: general, archaeological, botanical, geological, historical, and zoological. Annotations are included only where necessary to clarify contents. Because of their rugged topography, the Loess Hills of western Iowa have resisted large-scale conversion to agriculture. This has permitted noteworthy persistence of native prairies and woodlands, along with their associated species. This bibliography complements two special issues of the Proceedings of the Iowa Academy of Science devoted to Iowa's Loess Hills.

Should The Ports Of New Orleans And Mobile Be United Under A Single Port Authority, Charles E. Dorsett

Marine Affairs Theses and Major Papers

United States ports along the coast of the Gulf of Mexico are engaged in fierce competition among themselves to attract existing and future trade. This competition has served to force modernization and expansion of facilities in all the ports. The effort is running into the billions of dollars and there are concerns that there is too much duplication of costly facilities. The Port of New Orleans benefits from its location at the southern terminus of the Mississippi River System. Until five years ago it was the sole significant transhipment node between the nation's midsection and its customers and suppliers. In …