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

Digital Commons Network™

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

Physical Sciences and Mathematics

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 9301 - 9330 of 10860

Full-Text Articles in Entire DC Network

Rocky Mountain Wolf Recovery 2003 Annual Report Mar 2003

Rocky Mountain Wolf Recovery 2003 Annual Report

Rocky Mountain Wolf Recovery: Annual Reports

Wolves (Canis lupus) in the Northern Rocky Mountain states (Idaho, Montana and Wyoming) continue to increase in distribution and numbers (Figures 1, 5). Estimates of wolf numbers at the end of 2003 were 368 wolves in the Central Idaho Recovery Area, 301 in the Greater Yellowstone Recovery Area, and 92 in the Northwest Montana Recovery Area for a total of 761 (Figure 1, Table 4a). By state boundaries, there were an estimated 345 wolves in the state of Idaho, 234 in Wyoming and 182 in Montana (Table 4b). Of approximately 94 groups of two or more wolves, 51 …


Crop Updates 2003 - -Katanning, Robert F. Park, Rob Loughman, Colin Wellings, Greg Shea, Jocelyn Ball, Natasha Littlewood, Lucy Creagh, Alex Douglas, David Stephens, Ross Brennan, Mike Bolland, Narelle Hill, Phil Michael, Francoise A. Berlandier, Christiaan Valentine, Roy Latta, M. Rodger Beermier, Keith Devenish, Blakely Paynter, Kevin Young, Robin Wilson, Ian Barclay, Robyn Mclean, Jenny Garlinge, Bill Lambe, Neil Venn, Peter Clarke, Frances C. Hoyle, Leanne Schulz, Judith Devenish Mar 2003

Crop Updates 2003 - -Katanning, Robert F. Park, Rob Loughman, Colin Wellings, Greg Shea, Jocelyn Ball, Natasha Littlewood, Lucy Creagh, Alex Douglas, David Stephens, Ross Brennan, Mike Bolland, Narelle Hill, Phil Michael, Francoise A. Berlandier, Christiaan Valentine, Roy Latta, M. Rodger Beermier, Keith Devenish, Blakely Paynter, Kevin Young, Robin Wilson, Ian Barclay, Robyn Mclean, Jenny Garlinge, Bill Lambe, Neil Venn, Peter Clarke, Frances C. Hoyle, Leanne Schulz, Judith Devenish

Crop Updates

This session covers sixteen papers from different authors

  1. Breeding Cereals for Rust Resistance – are we losing the battle? Robert F. Park, University of Sydney

  2. Stripe rust – where to now for the WA wheat industry? Robert Loughman, Department of Agriculture, Colin Wellings, University of Sydney, Greg Shea, Department of Agriculture

  3. Oaten hay production, Jocelyn Ball, Natasha Littlewood and Lucy Creagh, Department of Agriculture

  4. Don’t rely on ‘Spray and Pray’ Alex Douglas, Department of Agriculture

  5. Seasonal outlook: What is in store for 2003, David Stephens, Department of Agriculture

  6. No-till copper, phosphorus and zinc …


The Prairie Naturalist Volume 35, No.1 March 2003 Mar 2003

The Prairie Naturalist Volume 35, No.1 March 2003

The Prairie Naturalist

PATTERNS OF IMPALING IN A MIGRATORY POPULATION OF THE LOGGERHEAD SHRIKE ▪ J. D. Esely and E. K. Bollinger

COMPARISON OF FEEDING IN TWO PHENOLOGICALLY DISTINCT GRASSHOPPERS ▪ K. J. Haynes

DISTRIBUTION AND TRENDS OF BANDED CANADA GEESE IN SOUTH DAKOTA ▪ J. S. Gleason, J. A. Jenks, and P. W. Mammenga

FLORISTIC ASSESSMENT OF SAND PRAIRIES AND SEDGE MEADOWS, LEE COUNTY, ILLINOIS ▪ W. C. Handel, L. R. Phillippe, and J. E. Ebinger

POULT PROTECTION BY MERRIAM'S TURKEY FEMALES TOWARDS A NORTHERN GOSHAWK ▪ C. P. Lehman

ADDITIONAL ECTOPARASITIC RECORDS OF BATS FROM KANSAS ▪ D. W. Sparks, K. …


Pc–Based Data Acquisition For A Solid Substrate Cultivation Deep Bed Reactor, Mari S. Chinn, Sue E. Nokes, Richard S. Gates Mar 2003

Pc–Based Data Acquisition For A Solid Substrate Cultivation Deep Bed Reactor, Mari S. Chinn, Sue E. Nokes, Richard S. Gates

Biosystems and Agricultural Engineering Faculty Publications

This work describes an instrumentation and data acquisition system designed for a deep bed reactor used to cultivate Trichoderma longibrachiatum on wheat bran. The system allowed on–line measurements of substrate temperature, oxygen concentration within the reactor headspace, relative humidity and temperature of the inlet air, and inlet airflow rates while maintaining aseptic conditions and without disturbing the cultivation process. An error analysis for the instrumentation and data acquisition equipment was completed and provided insight into the reliability of the sensor readings. The collected data provided quantitative information about the reactor system dynamics which can be used to evaluate and apply …


Wayne E. Sabbe Arkansas Soil Fertility Studies 2002, Nathan A. Slaton Mar 2003

Wayne E. Sabbe Arkansas Soil Fertility Studies 2002, Nathan A. Slaton

Arkansas Agricultural Experiment Station Research Series

Rapid technological changes in crop management and production require that the research efforts also be presented in an expeditious manner. The contributions of soil fertility and fertilizers are major production factors in all Arkansas crops. The studies contained within will allow producers to compare their practices with the university’s research efforts. Additionally, soil test data and fertilizer sales are presented to allow comparisons among years, crops, and other areas within Arkansas.


Producing Quality Alfalfa Hay, Jimmy C. Henning, Garry D. Lacefield Feb 2003

Producing Quality Alfalfa Hay, Jimmy C. Henning, Garry D. Lacefield

Kentucky Alfalfa and Stored Forage Conference

Hay is one of the most versatile of stored forages in that (1) it can be kept for long periods of time with little loss of nutrients if protected from weather; (2) a large number of crops can be successfully used for hay production; (3) it can be produced and fed in small or large amounts; (4) it can be harvested, stored and fed by hand or the production and feeding can be completely mechanized; and (5) hay can supply most nutrients needed by many classes of livestock. Hay is, therefore, the most commonly used stored feed on most farms.


Buying And Selling Alfalfa Hay, Garry D. Lacefield, Jimmy C. Henning Feb 2003

Buying And Selling Alfalfa Hay, Garry D. Lacefield, Jimmy C. Henning

Kentucky Alfalfa and Stored Forage Conference

Alfalfa hay is an important agricultural product. Although often fed on the farms where it is produced, much alfalfa hay is also sold as a cash crop. It often constitutes a major source of income for those who sell it, or a major expense for those who buy it. Such transactions involve billions of dollars nationwide each year.


Alfalfa And Mrls: What We Know After One Year Of Testing, Jimmy C. Henning, Wayne Long Feb 2003

Alfalfa And Mrls: What We Know After One Year Of Testing, Jimmy C. Henning, Wayne Long

Kentucky Alfalfa and Stored Forage Conference

The onset of mare reproductive loss syndrome in April 2001 in Kentucky lead to much speculation about its cause. Some of these initial 'suspects' included the ergot alkaloids of tall fescue, potential cyanide content of white clover, wide Calcium/Potassium ratios in pasture, fungal mycotoxins and the presence of certain poisonous plants. Certain consultants also indicated that no one should purchase or feed any Kentucky hay in 2001. However, these statements were not based on any hard information, just one person's opinion. But great damage was done to the confidence in Kentucky grown hay.


Alfalfa Hay Quality: Terms And Definitions, Garry D. Lacefield Feb 2003

Alfalfa Hay Quality: Terms And Definitions, Garry D. Lacefield

Kentucky Alfalfa and Stored Forage Conference

At the 22nd Kentucky Alfalfa Conference we discussed the relationship among Alfalfa - Yield-Quality-Persistence. In our presentation, we indicated that all three components must be considered for best management of alfalfa stands. Over the past week, I have looked through the past twenty-two years of Alfalfa Conference Proceedings. It's interesting, but not surprising that we have focused far more attention on yield than on quality and/or persistence.

Alfalfa yield (quantity) and quality are both important; however, it is easier for producers to recognize problems associated with quantity than quality because quantity can be easily assessed visually. Thus, forage quantity …


Scavenging By Vertebrates: Behavioral, Ecological, And Evolutionary Perspectives On An Important Energy Transfer Pathway In Terrestrial Ecosystems, Travis L. Devault, Olin E. Rhodes Jr., John A. Shivik Feb 2003

Scavenging By Vertebrates: Behavioral, Ecological, And Evolutionary Perspectives On An Important Energy Transfer Pathway In Terrestrial Ecosystems, Travis L. Devault, Olin E. Rhodes Jr., John A. Shivik

United States Department of Agriculture Wildlife Services: Staff Publications

Carrion use by terrestrial vertebrates is much more prevalent than conventional theory implies, and, rather than a curiosity of animal behavior, is a key ecological process that must be accounted for. Human aversion to rotted substances and difficulties associated with identifying scavenged material in studies of food habits have contributed to the relative lack of information concerning scavenging behavior in vertebrates. Several lines of evidence, however, suggest that carrion resources are more extensively used by vertebrates than has been widely assumed: 1) a substantial number of animals die from causes other than predation and become available to scavengers, 2) a …


Parasite Remains In Archaeological Sites, Françoise Bouchet, Niéde Guidon, Katharina Dittmar, Stephanie Harter, Luiz F. Ferreira, Sérgio A.M. Chaves, Karl J. Reinhard, Adauto Araújo Feb 2003

Parasite Remains In Archaeological Sites, Françoise Bouchet, Niéde Guidon, Katharina Dittmar, Stephanie Harter, Luiz F. Ferreira, Sérgio A.M. Chaves, Karl J. Reinhard, Adauto Araújo

School of Natural Resources: Faculty Publications

Organic remains can be found in many different environments. They are the most significant source for paleoparasitological studies as well as for other paleoecological reconstruction. Preserved paleoparasitological remains are found from the driest to the moistest conditions. They help us to understand past and present diseases and therefore contribute to understanding the evolution of present human sociality, biology, and behavior. In this paper, the scope of the surviving evidence will be briefly surveyed, and the great variety of ways it has been preserved in different environments will be discussed. This is done to develop to the most appropriated techniques to …


Crop Updates - 2003 Lupins, Mark Sweetingham, Bevan J. Buirchell, Geoff Thomas, Amelia Mclarty, Harmohinder Dhammu, Martin Harries, Wayne Parker, Terry Piper, David Nicholson, Jairo Palta, Neil C. Turner, Bob French, Kedar Adhikari, Katia Stefanova, Françoise Berlandier, Glen Riethmuller, Paul Blackwell, Geoff Fosbery, Bill Crabtree, Tracy Gilham, Laurie Wahlsten, Pierre Fievez, Mike Collins, John Holmes, Dirranie Kirby, Ken Adcock, Roger Jones, Rohan Prince, Stuart Johnson, Ramon Hall, Madeleine Ball, Sofia Sipas, David Petterson Feb 2003

Crop Updates - 2003 Lupins, Mark Sweetingham, Bevan J. Buirchell, Geoff Thomas, Amelia Mclarty, Harmohinder Dhammu, Martin Harries, Wayne Parker, Terry Piper, David Nicholson, Jairo Palta, Neil C. Turner, Bob French, Kedar Adhikari, Katia Stefanova, Françoise Berlandier, Glen Riethmuller, Paul Blackwell, Geoff Fosbery, Bill Crabtree, Tracy Gilham, Laurie Wahlsten, Pierre Fievez, Mike Collins, John Holmes, Dirranie Kirby, Ken Adcock, Roger Jones, Rohan Prince, Stuart Johnson, Ramon Hall, Madeleine Ball, Sofia Sipas, David Petterson

Crop Updates

This session covers twenty one papers from different authors

LUPIN ISSUES AND R & D DIRECTIONS

  1. Mark Sweetingham, Department of Agriculture

    ACKNOWLEDGEMENTS

    VARIETIES AND BREEDING

  2. New lupin line for release – WALAN2141, Bevan J, Buirchell, Mark Sweetingham, Geoff Thomas, Amelia McLarty, Harmohinder Dhammu and CVT and Lupin Breeding teams, Department of Agriculture

  3. Lupin variety trial, Martin Harries and Wayne Parker, Department of Agriculture

  4. Herbicide tolerance of new lupins, Harmohinder S. Dhammu, Terry Piper and David Nicholson, Department of Agriculture

    YELLOW AND ALBUS LUPINS

  5. Selection for high lupin yield under terminal drought, Jairo A. Palta1&2, Neil …


Predator Odours As Reproductive Inhibitors For Norway Rats, Vera V. Voznessenskaya, Sergey V. Naidenko, Natalia Yu. Feoktistova, Georgy J. Krivomazov, Lowell A. Miller, Larry Clark Feb 2003

Predator Odours As Reproductive Inhibitors For Norway Rats, Vera V. Voznessenskaya, Sergey V. Naidenko, Natalia Yu. Feoktistova, Georgy J. Krivomazov, Lowell A. Miller, Larry Clark

United States Department of Agriculture Wildlife Services: Staff Publications

We examined the influence of predator odor on reproductive output of Norway rats (Rattus norvegicus). Naive laboratory rats responded to predator chemical cues with reduced litter sire and skewed sex ratio. We found that exposure to predator urine had its greatest effect on implantation and maintenance of implantation when predator urine was applied to the bedding of rats during the first third of gestation. Based on the physical appearance of corpora lutea and uterine implantation scars, we found that the reduction in litter sire was due to resolution of the embryos during the early part of gestation. Subsequently, …


Geographic Information System Methodologies To Evaluate Relationships Between Land Use And Groundwater Quality In South Central Kentucky, Rhonda Pfaff Feb 2003

Geographic Information System Methodologies To Evaluate Relationships Between Land Use And Groundwater Quality In South Central Kentucky, Rhonda Pfaff

Masters Theses & Specialist Projects

The development of Geographic Information System (GIS) technology has provided techniques for a holistic approach to the study of karst groundwater contamination. While karst groundwaters supply water to a large percentage of the earth's population, its complex environments often have lacked the scientific examination and conservation measures typical of non-karst regions. In this study, GIS methodologies were explored to examine the relationships between land-use and water quality in karst watersheds. Eight watersheds throughout southern and western Kentucky were examined. The study areas included the Mammoth Cave Karst Aquifer, which is the watershed that drains the Mammoth Cave System, and seven …


Gray Whales Off Sakhalin Island, Russia: June – September 2001: A Joint U.S. – Russia Scientific Investigation, David W. Weller, Alexander M. Burdin, Amanda L. Bradford, Grigory A. Tsidulko, Yulia V. Ivashchenko, Robert L. Brownell Jr. Feb 2003

Gray Whales Off Sakhalin Island, Russia: June – September 2001: A Joint U.S. – Russia Scientific Investigation, David W. Weller, Alexander M. Burdin, Amanda L. Bradford, Grigory A. Tsidulko, Yulia V. Ivashchenko, Robert L. Brownell Jr.

United States Department of Commerce: Staff Publications

Numerous species of marine mammals inhabit the Sea of Okhotsk. Two of the most endangered populations of large whales in the world; the Okhotsk Sea bowhead whale (Balaena mysticetus) and the western North Pacific (Okhotsk-Korean) gray whale are known to occur in this sea (Brownell et al., 1997; Clapham et al., 1999). Concerns regarding the status of these whale populations have been intensified by the onset of offshore oil and gas development programs in Okhotsk waters. Anthropogenic activities related to oil and gas exploration off the northeastern Sakhalin Island shelf include geophysical seismic surveying, drilling and production operations, …


A Comprehensive Review Of The Ecological And Human Social Effects Of Artificial Feeding And Baiting Of Wildlife, L. Dunkley, M.R.L. Cattet Feb 2003

A Comprehensive Review Of The Ecological And Human Social Effects Of Artificial Feeding And Baiting Of Wildlife, L. Dunkley, M.R.L. Cattet

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

In recent years, events within Canada and the United States have drawn attention to potential negative consequences of feeding and baiting wild animals, especially enhanced transmission of infectious diseases such as bovine tuberculosis and chronic wasting disease. This report was prepared to gather available science-based information on the ecological and human social effects of artificial feeding and baiting of wildlife into one readily accessible document. The contracting agencies, Parks Canada and Saskatchewan Environment, recognize that an objective review of existing literature may help to answer questions and concerns within and outside the agencies, and help to guide subsequent decision-making concerning …


Temporal Genetic Variation In A Coyote (Canis Latrans) Population Experiencing High Turnover, Christen Lenney William, Karen Blejwas, John J. Johnston, Michael M. Jaeger Feb 2003

Temporal Genetic Variation In A Coyote (Canis Latrans) Population Experiencing High Turnover, Christen Lenney William, Karen Blejwas, John J. Johnston, Michael M. Jaeger

United States Department of Agriculture Wildlife Services: Staff Publications

Coyotes (Canis latrans) are mobile, adaptable canids found in a wide range of habitats across North America, with range extensions into previously unoccupied areas in the western and eastern United States. Although long-distance dispersal capabilities in both sexes (Harrison 1992) and relatively large proportions of transient coyotes that do not exhibit fidelity to a single territory (typically 13–34% of a population— Andelt 1985; Windberg and Knowlton 1988) suggest that coyotes exist as a panmictic population, other aspects of coyote behavior may increase the likelihood of local population structure.


Stage Based Interventions For Low Fat Diet With Middle School Students, Marilyn Frenn, Shelly Malin, Naveen K. Bansal Feb 2003

Stage Based Interventions For Low Fat Diet With Middle School Students, Marilyn Frenn, Shelly Malin, Naveen K. Bansal

College of Nursing Faculty Research and Publications

Preventing obesity and cardiovascular disease at early ages is important; however, few effective interventions for early adolescents have been reported. In this study, low-income, culturally diverse students from an urban middle school (n = 60) received four classroom interventions with the use of a combined Health Promotion/Transtheoretical Model to control fat in diet and increase physical activity. A control group (n = 57) received the usual classroom education. Pretest percentage fat in diet was regressed on demographics, access to low-fat foods, perceived self-efficacy, benefits/barriers, and stage of change with results as proposed by the model [F(9,64) …


The History Of Community Gardens In New York City: The Role Of Urban Agriculture And Green Roofs In Addressing Environmental Racism, Rosamarie Ridge Jan 2003

The History Of Community Gardens In New York City: The Role Of Urban Agriculture And Green Roofs In Addressing Environmental Racism, Rosamarie Ridge

Student Theses 2001-2013

-


Wattle Size Is Correlated With Male Territorial Rank In Juvenile Ring-Necked Pheasants, Anna Papeschi, John P. Carroll, Francesco Dessi-Fulgheri Jan 2003

Wattle Size Is Correlated With Male Territorial Rank In Juvenile Ring-Necked Pheasants, Anna Papeschi, John P. Carroll, Francesco Dessi-Fulgheri

School of Natural Resources: Faculty Publications

We used morphological measurements and behavioral observations to investigate the relationship between male ornaments and male social rank during the breeding season in a free-ranging population of one-year-old Ring-necked Pheasants (Phasianus colchicus). The sample was of birds of the same age class to avoid the confounding effect of age differences. Tail length, used by females in mate choice, and tarsal spur length, used by males as a weapon in fights, were not correlated with male rank, whereas the size of the wattle was the most important trait. This combined with recent studies showing that wattle size reliably indicates …


Conjugated Linoleic Acid Does Not Improve Insulin Tolerance In Mice, Kimberly M Hargrave, Michael J. Azain, Stephen D. Kachman, Jess Miner Jan 2003

Conjugated Linoleic Acid Does Not Improve Insulin Tolerance In Mice, Kimberly M Hargrave, Michael J. Azain, Stephen D. Kachman, Jess Miner

Department of Statistics: Faculty Publications

Objective: To determine if the addition or removal of dietary conjugated linoleic acid (CLA) would alter insulin tolerances in mice from two genetic lines.

Research Methods and Procedures: High metabolic rate (MH) and low metabolic rate (ML) mice were assigned to consume 1) a control diet ad libitum, 2) a control diet at a restricted intake, or 3) a diet containing 1% CLA ad libitum. After 9 weeks, an insulin tolerance test was conducted, and a portion of the mice were killed. All remaining mice consumed the control diet ad libitum. Insulin tolerance tests were conducted 11 and 32 days …


Ecophysiology Of Seedlings Of Three Mediterranean Pine Species In Contrasting Light Regimes, Tala Awada, Kalliopi Radoglou, Mariangela N. Fotelli, Helen I. A. Constantinidou Jan 2003

Ecophysiology Of Seedlings Of Three Mediterranean Pine Species In Contrasting Light Regimes, Tala Awada, Kalliopi Radoglou, Mariangela N. Fotelli, Helen I. A. Constantinidou

School of Natural Resources: Faculty Publications

Seasonal dynamics of net photosynthesis (Anet) in 2-year-old seedlings of Pinus brutia Ten., Pinus pinea L. and Pinus pinaster Ait. were investigated. Seedlings were grown in the field in two light regimes: sun (ambient light) and shade (25% of photosynthetically active radiation (PAR)). Repeated measures analyses over a 12-month period showed that Anet varied significantly among species and from season to season. Maximum Anet in sun-acclimated seedlings was low in winter (yet remained positive) and peaked during summer. Maximum Anet was observed in June in P. pinea (12 μmol m–2 s–1), …


Kentucky Water Resources Research Institute Annual Technical Report Fy 2002, Kentucky Water Resources Research Institute, University Of Kentucky Jan 2003

Kentucky Water Resources Research Institute Annual Technical Report Fy 2002, Kentucky Water Resources Research Institute, University Of Kentucky

KWRRI Annual Technical Reports (USGS’s 104b Grant Program)

The FY 2002 Annual Technical Report for Kentucky consolidates reporting requirements of the Section 104(b) base grant award in a single technical report that includes: 1) a synopsis of each research project supported during the period, 2) a list of related reports, 3) a description of information transfer activities, 4) a summary of student support during the reporting period, and 5) notable achievements and awards during the year.


Evidence For Disease-Related Amphibian Decline In Colorado, Erin Muths, Paul Stephen Corn, Allan P. Pessier, D. Earl Green Jan 2003

Evidence For Disease-Related Amphibian Decline In Colorado, Erin Muths, Paul Stephen Corn, Allan P. Pessier, D. Earl Green

United States Geological Survey: Staff Publications

The recent discovery of a pathogenic fungus (Batrachochytrium dendrobatidis) associated with declines of frogs in the American and Australian tropics, suggests that at least the proximate cause, may be known for many previously unexplained amphibian declines. We have monitored boreal toads in Colorado since 1991 at four sites using capture–recapture of adults and counts of egg masses to examine the dynamics of this metapopulation. Numbers of male toads declined in 1996 and 1999 with annual survival rate averaging 78% from 1991 to 1994, 45% in 1995 and 3% between 1998 and 1999. Numbers of egg masses also declined. …


The Anorexigenic Fatty Acid Synthase Inhibitor, C75, Is A Nonspecific Neuronal Activator, Kanji A. Takahashi, James L. Smart, Hongyan Liu, Roger D. Cone Jan 2003

The Anorexigenic Fatty Acid Synthase Inhibitor, C75, Is A Nonspecific Neuronal Activator, Kanji A. Takahashi, James L. Smart, Hongyan Liu, Roger D. Cone

Faculty Publications - Department of Biological & Molecular Science

C75, a recently derived compound that potently suppresses feeding and induces weight loss, has been proposed to act mainly by inhibiting fatty acid synthase (FAS) in central neurons that control feeding. For example, normal, fasting- associated, hypothalamic increases in neuropeptide Y (NPY)/Agouti-related protein (AGRP) expression and decreases in proopiomelanocortin (POMC)/cocaine and amphetamine regulated transcript (CART) expression were reported to be blocked by C75. Using loose-patch extracellular recording in acute slices, we tested the effect of C75 on anorexigenic POMC neurons and orexigenic NPY neurons of the hypothalamic arcuate nucleus, which were identified by promoter-driven GFP expression, as well as on …


Am I Too Fat? Bulimia As An Epidemic, Christopher Kribs, Beverly Gonzalez, Emilia Huerta-Sanchez, Angela Ortiz-Nieves, Terannie Vazquez-Alvarez Jan 2003

Am I Too Fat? Bulimia As An Epidemic, Christopher Kribs, Beverly Gonzalez, Emilia Huerta-Sanchez, Angela Ortiz-Nieves, Terannie Vazquez-Alvarez

Mathematics Faculty Publications - Archive

For at least the past ten years, eating disorders have had a major impact in the physical and mental health of women, particularly young women. Anorexia and bulimia nervosa are closely linked eating disorders. Anorexia often precedes bulimia. However, there are about 2 million women in college that have been exclusively bulimic. In this article, we focus on the role of college-peer pressure on the dynamics of anorexia-free bulimia. The model looks at bulimia as a progressive disease and explores the impact of intervention (treatment) at two stages of disease progression. The impact of relapse (a common occurrence among bulimics) …


Salt Tolerance Of Sunflower And Lettuce In Cultivated And Uncultivated Grass Soil, Steven H. Emerman, Emily M. Kinsinger Jan 2003

Salt Tolerance Of Sunflower And Lettuce In Cultivated And Uncultivated Grass Soil, Steven H. Emerman, Emily M. Kinsinger

Journal of the Iowa Academy of Science: JIAS

We tested two hypotheses: 1) whether a vegetable crop will show greater growth under a given salinity treatment in an uncultivated grass soil than a cultivated soil and 2), if so, whether the greater growth is due to the occasional presence of relatively fresh water in macropores or the interaction between salinity and hypoxia in a soil without significant macropores. A previous study suggested uptake from. macropores was significant only for crops with high root water potential (Emerman and Dawson 1997). Hence, in this study, 21 miniature crops were grown in a greenhouse, and the ratio of root dry weight …


Iowa Academy Of Science 115th Annual Meeting [Program, 2003], Iowa Academy Of Science Jan 2003

Iowa Academy Of Science 115th Annual Meeting [Program, 2003], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 2
General Session Speakers --- 4
Symposia Programs --- 7
Special Panel --- 9
Awards --- 10
Section Programs/Special Sessions/Abstracts --- 11
Agricultural Science (poster) --- 12
Anthropology --- 13
Botany --- 16
Cellular, Molecular & Microbiology and Physiology --- 20
Chemistry: Inorganic, Analytical & Physical --- 23
Chemistry: Organic & Biological --- 23
Conservation --- 25
Engineering --- 29
Environmental Science and Health --- 35
Geology --- 37
Physics --- 41
Physiology (posters) --- 44
Zoology --- 46
Mussel Symposia --- 52
Energy Symposia --- 56
IAS Officers & Directors --- 59
IAS Annual Meeting …


A Model Life Table For Bottlenose Dolphins (Tursiops Truncatus) From The Indian River Lagoon System, Florida, U.S.A., Megan K. Stolen, Jay Barlow Jan 2003

A Model Life Table For Bottlenose Dolphins (Tursiops Truncatus) From The Indian River Lagoon System, Florida, U.S.A., Megan K. Stolen, Jay Barlow

United States Department of Commerce: Staff Publications

Data gathered from 220 stranded bottlenose dolphins (Tzmiop tvuncatlls) in the Indian River Lagoon system, Florida, were used to derive a life table. Survivorship curves were fit to the data using Siler’s competing-risk model and a maximum likelihood approach. Population growth was estimated to be between r = 0.0 and 0.046 based on the observed numbers of stranded dolphins. Variance in survival rates was estimated using an individual-based, age-structured population projection model. We estimate that the overall annual mortality rate for this population was 9.8% per year. Sex-specific differences in survivorship were apparent with females outliving males. The …


Seasonal Distribution Of Migratory Tree Bats (Lasiurus And Lasionycteris) In North America, Paul M. Cryan Jan 2003

Seasonal Distribution Of Migratory Tree Bats (Lasiurus And Lasionycteris) In North America, Paul M. Cryan

United States Geological Survey: Staff Publications

Despite evidence of migration in North American tree bats (genera Lasiurus and Lasionycteris), details regarding seasonal movements in these widely distributed species are few. This study attempted to clarify patterns of seasonal distribution by mapping museum occurrence records by month. Monthly changes in the distribution of records indicate seasonal movements of tree bats. Northward migration during spring by Lasiurus cinereus appears to stem from wintering grounds in California and Mexico. During summer, male L. cinereus is mainly distributed in western North America, whereas females dominate samples from eastern regions. Lasiurus borealis winters in southeastern areas and expands its range …