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Dynamic Analysis Of Unidirectional Pressure Infiltration Of Porous Preforms By Pure Metals, Dhiman K. Biswas, Jorge E. Gatica, Surendra N. Tewari

Chemical & Biomedical Engineering Faculty Publications

Unidirectional pressure infiltration of porous preforms by molten metals is investigated numerically. A phenomenological model to describe fluid flow and transport phenomena during infiltration of fibrous preforms by a metal is formulated. The model describes the dynamics of the infiltration process, the temperature distribution, and solid fraction distribution. The numerical results are compared against classical asymptotic analyses and experimental results. This comparison shows that end effects may become important and render asymptotic results unreliable for realistic samples. Fiber volume fraction and initial temperature appear as the factors most strongly influencing infiltration. Metal superheating affects not only the length of the …

The Role Of Anadromous Sockeye Salmon (Oncorhynchus Nerka) In The Nutrient Loading And Productivity Of The Sawtooth Valley Lakes, Idaho, H. P. Gross, Wayne A. Wurtsbaugh, Chris Luecke

Watershed Sciences Faculty Publications

We constructed a simulation model for Redfish Lake, Idaho, using water budget and nutrient loading measurements, to predict the dependence of lake production on nutrients from the watershed, precipitation, lake fertilization, and marine-derived nutrients from sockeye salmon Oncorhynchus nerka, which historically have reared in the lake. We also used the model to simulate different management scenarios to help restore the endangered Snake River sockeye salmon. The model and other empirical evidence indicated that even before hydropower dams were present in the migration corridor, marine-derived nutrients were not of major importance to lake production, contributing only about 3% of the annual …

Trees Working In Western Australia, Dave Berry

Journal of the Department of Agriculture, Western Australia, Series 4

There is an air of inevirability about farm forestry - no-one disputs that planting trees is a sure route to curbing agriculture's serious land degredation problem. Dave Berry talks with some of the key players developing the industry.

Strategy Building Session For Wirenet For The City Of Cleveland West Side Economic Development Initiative: Site Prioritization And Selection, Kirstin Toth, Donald T. Iannone

All Maxine Goodman Levin School of Urban Affairs Publications

No abstract provided.

Teachers' Understanding Of Word Problems, Mir Afzal Tajik

Book Chapters / Conference Papers

No abstract provided.

Orthogonal Harmonic Analysis Of Fractal Measures, Palle Jorgensen, Steen Pedersen

Mathematics and Statistics Faculty Publications

We show that certain iteration systems lead to fractal measures admitting an exact orthogonal harmonic analysis.

Effect Of High-Temperature Annealing On Electrical And Optical Properties Of Undoped Semi-Insulating Gaas, Z-Q. Fang, D. C. Reynolds, David C. Look, N. G. Paraskevopoulos, T. E. Anderson, R. L. Jones

Physics Faculty Publications

A comprehensive characterization, including room temperature Hall effect, near infrared absorption, temperature dependent dark current and photocurrent (using 1.13 eV light), normalized thermally stimulated current (NTSC), photoluminescence at 4.2 K in both near band edge and deep level regions, and selective pair photoluminescence (SPL) at 2 K, has been carried out on undoped semi-insulating GaAs samples, cut from four wafers which were grown by the low pressure liquid encapsulated Czochralski technique and annealed by three different schedules: a 1100 °C anneal with either fast or slow cooling, or a 1000 °C standard anneal. The 1100 °C anneal clearly introduces higher …

Predator Urines As Chemical Barriers To White-Tailed Deer, Jerrold L. Belant, Thomas W. Seamans, Laura A. Tyson

Vertebrate Pest Conference Proceedings: 18th (1998)

The authors assessed whether bobcat (Lynx rufus) or coyote (Canis latrans) urine could reduce white-tailed deer (Odocoileus virginianus) use of established feeding areas or trails. A four-week experiment evaluating deer use of eight feeding stations, four each with coyote or bobcat urine was conducted at a 2,200 ha fenced facility in northern Ohio with high deer densities (38/km²). At this same facility, the authors also monitored deer use of four trails where coyote urine was applied. For both experiments, urine was placed in holders positioned at ground level within 2 m of …

Center For Undergraduate Studies Catalog 1998-1999, Nova Southeastern University

Undergraduate Programs Course Catalogs

No abstract provided.

Director's Update, University School

University School Directors Update

No abstract provided.

Distribution And Ecology Of The Morels And False Morels Of Iowa, L. H. Tiffany, G. Knaphus, D. M. Huffman

Journal of the Iowa Academy of Science: JIAS

The distribution, time of fruiting and habitats of morels and false morels in Iowa were documented during a 10 year survey (1984-1993). Distribution maps for each species also include information from published reports and from herbarium records. The true morel genus, Morchella, is represented in Iowa by five species. Three of these species, M. deliciosa, M. esculenta and M. crassipes, are sometimes interpreted as segments of one large, extremely variable species. M. semilibera and M. angusticeps also occur. M. angusticeps, a black morel, has not been previously reported from Iowa. Four false morels, two species in each of two genera, …

Decline Of Iowa Populations Of The Regal Fritillary (Speyeria Idalia) Drury, Diane M. Debinskl, Liesl Kelly

Journal of the Iowa Academy of Science: JIAS

The Regal Fritillary butterfly, Speyeria idalia Drury (Lepidoptera: Nymphalidae, Argynninae), is a prairie endemic species which has exhibited a dramatic decline in Iowa during the last few decades. Tallgrass prairie is the primary habitat of S. idalia and the butterfly's presence is correlated with the presence of violets (Violaceae). Due to the extensive habitat fragmentation of Iowa prairies, both the butterfly and its host plant populations are limited primarily to unplowed, relatively pristine prairies. Thus, S. idalia is an excellent case study of a prairie endemic species. Here, we report on the results of a two-year survey of the insect …

Book Review - The Iowa Breeding Bird Atlas, Louis B. Best

Journal of the Iowa Academy of Science: JIAS

The Iowa Breeding Bird Atlas is the first comprehensive statewide survey of Iowa's breeding birds. Through the efforts of over 500 people, every county in the state was sampled to provide a record of the composition and distribution of the bird life in Iowa. The project entailed dividing the state into 861 atlas blocks; 83% received at least some coverage and 71 % were completed. Information known through 1995 is included in the text, although the atlas project ended in 1990.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

The Fungi, Lichens, And Myxomycetes Of Iowa: A Literature Review And Evaluation, Lois H. Tiffany, George Knaphus

Journal of the Iowa Academy of Science: JIAS

The fungi have been, and continue to be, a poorly documented portion of Iowa’s biological inheritance. Although many are perennially present in soil and plant debris and are crucially involved in the release and recycling of materials from organic residues or are partners with plant roots as mycorrhizae, they are not obvious until they produce fruiting structures such as mushrooms, boletes, brackets, puffballs, etc. The fungi causing plant disease are more obvious because of the reactions of their host plants; thus the earliest records of Iowa fungi are of ones causing plant diseases commonly referred to as mildews, rusts, and …

Status Of Aquatic Vascular Plants 1n Iowa's Natural Lakes, G. S. Phillips

Journal of the Iowa Academy of Science: JIAS

Conversion of wetlands to agricultural land during the settlement of Iowa has resulted in a significant decline in the total area of lake habitat in the state. This reduction in area, combined with the degradation of remaining sites, resulted in dramatic reductions in aquatic vascular plant populations associated with Iowa's natural lakes. While declines in plant species inhabiting fen, bog, seepage, prairie pothole, and marsh type wetlands have been extensively documented, few quantitative data exist for lake type wetlands. During the summer of 1996, a total of 86 natural lakes in Iowa were surveyed for aquatic vascular plants. Many of …

Iowa's Changing Forest Resources, Steven E. Jungst, Donald R. Farrar, Michael Brandrup

Journal of the Iowa Academy of Science: JIAS

After a period of decline in area extending from the 1850s to 1974, Iowa's forest area increased between 1974 and 1990. Although the area increase is encouraging, it may be fleeting. In addition, changes in forest stand structure and forest ownership patterns along with other pressures may make it difficult to maintain healthy forest ecosystems in the future. Notes from the original land survey in Iowa coupled with information from U.S. Forest Service forest inventories make it possible to look at changes in forest area and forest tree types. Unfortunately, similar long-term data do not exist to make possible a …

The Status Of Iowa's Lepidoptera, Dennis W. Schlicht, Timothy T. Orwig

Journal of the Iowa Academy of Science: JIAS

Including strays, 122 species of butterflies have been confirmed in Iowa. However, since European settlement the populations of taxa of Iowa Lepidoptera have declined. While certain generalist species have experienced declines, species with life cycles that include native habitats, especially prairies and wetlands, have been particularly vulnerable. In a 1994 revision of the Iowa endangered and threatened species list, the Natural Resource Commission (NRC) listed two species of butterflies as endangered, five as threatened, and 25 as special concern, using general legal definitions of those rankings (NRC 1994). But after examining recent records, we have revised that list, using numbers …

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Mammals Of Iowa: Holocene To The End Of The 20th Century, John B. Bowles, Daryl L. Howell, Richard P. Lampe, Howard P. Whidden

Journal of the Iowa Academy of Science: JIAS

This review of Iowa's mammal fauna at the close of the 20th century summarizes changes in distributional patterns following Euroamerican settlement in the early 1800s. Data from historical records, museum specimens, and presettlement late Holocene fossils indicate presence of 69 resident mammals at that time. Hunting pressures and the conversion of prairie and forest to agricultural fields reduced the populations and ranges of many state mammals, and 14 species were extirpated by 1900. An additional 15 species are either uncommon or rare today, and the Iowa Department of Natural Resources lists four species as endangered, three as threatened and one …

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

1998 Softball, University Of Northern Iowa

Athletics Media Guides

Contents

This is Northern Iowa --1
Facilities/Media Information --2
Meet the Athletic Administration --3
Meet the Panther Support Staff --4
Meet the Coaches --5
199 Season Outlook --6
1998 Roster --7
Player Profiles--Kristen Dalrymple --8
Amber Sampson --9
Maggie Sellers --10
Shelby Worms --11
Heather Blair/Jody Dean --12
Jackie Paulus/ Angie Schreurs --13
Heidi Fromherz/Melissa Navntoft --14
Kylie Sloan/Jeannine Soncini --15
Stacey Patterson/Jamie Curran/Heidi Freitager --16
Trina Reed/Beth Scheetz/Stephanie Staveley --17
1997 Results --18 1997 Statistics --19
The Missouri Valley Conference --20
1997 Missouri Valley Conference Results --21
1997 Missouri Valley Conference Stats- All Games --22
1997 Missouri Valley Conference …

Resource Notes-Academic Year 1997-98

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

The Plausibility Of Legally Protecting Reasonable Expectations, Bailey Kuklin

Faculty Scholarship

No abstract provided.

A Preliminary Assessment Of Wave, Current, And Sediment Interactions On The Louisiana Shoreface Adjacent To The Isles Dernieres, David A. Pepper, Gregory W. Stone, Ping Wang

Geology Faculty Publications

The Louisiana coast is generally characterized as a low wave-energy environment where sediment transport is dominated by the influence of the Mississippi and the Atchafalaya Rivers. Winter cold fronts, however, generate waves and currents that have a significant impact on a variety of Louisiana’s coastal environments, although field data regarding their influence on the inner shelf are extremely sparse. During a 12-d period that included the passage of two cold fronts, waves and near-bed currents were measured on the Louisiana inner-shelf (depth-8 m) using a sophisticated bottom-mounted instrumentation system. Bottom boundary layer parameters were then calculated using wave-current interaction models, …

The Aftermath Of The Virginia Military Institute Decision: Will Single-Gender Education Survive?, Tod Christopher Gurney

Santa Clara Law Review

No abstract provided.

Preparation And Structures Of Crystalline Aromatic Cation-Radical Salts. Triethyloxonium Hexachloroantimonate As A Novel (One-Electron) Oxidant, Rajendra Rathore, A. S. Kumar, Sergey V. Lindeman, Jay K. Kochi

Chemistry Faculty Research and Publications

Triethyloxonium hexachloroantimonate [Et₃O⁺SbCl₆^-] is a selective oxidant of aromatic donors (ArH), and it allows the facile preparation and isolation of crystalline paramagnetic salts [ArH^+•, SbCl₆^-] for the X-ray structure determination of various aromatic cation radicals. The mechanistic relationship between the Meerwein salt [Et₃O⁺SbCl₆^-] and the pure Lewis acid oxidant SbCl₅ is based on a prior ethyl transfer from oxygen to chlorine within the ion pair.

Backlog 1998, Lipscomb University

Backlogs and Other Yearbooks

The 1998 Lipscomb University Backlog yearbook.