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Articles 4501 - 4530 of 8069
Full-Text Articles in Entire DC Network
Proposals Submitted In Fiscal Year 2004, Grants Development Office
Proposals Submitted In Fiscal Year 2004, Grants Development Office
Grants Development Office Reports
No abstract provided.
Grants And Contracts Awarded In Fiscal Year 2004, Grants Development Office
Grants And Contracts Awarded In Fiscal Year 2004, Grants Development Office
Grants Development Office Reports
No abstract provided.
Human-Robot Interaction, Erika Rogers
Human-Robot Interaction, Erika Rogers
Computer Science and Software Engineering
The relationship between robots and humans is so different in character from other human-machine relationships that it warrants its own field of study. Robots differ from simple machines and even from complex computers in that they are often designed to be mobile and autonomous. They are not as predictable as other machines; they can enter a human’s personal space, forcing a kind of social interaction that does not happen in other human-machine relationships.
Hamlet Revisited: How Evolution Really Works, William D. Stansfield
Hamlet Revisited: How Evolution Really Works, William D. Stansfield
Biological Sciences
Delves into the artificial programs that are merely metaphors for the processes of organic evolution. Relation of this organic evolution with the phrases in the play "Hamlet" of Shakespeare; Disadvantage of using these metaphors as educational tools; Definition of various kinds of patterns for evolution.
Physical Forcing Of Phytoplankton Community Structure And Primary Production In Continental Shelf Waters Of The Western Antarctic Peninsula, Barbara B. Prezelin, Eileen E. Hofmann, Mark A. Moline, John M. Klinck
Physical Forcing Of Phytoplankton Community Structure And Primary Production In Continental Shelf Waters Of The Western Antarctic Peninsula, Barbara B. Prezelin, Eileen E. Hofmann, Mark A. Moline, John M. Klinck
Biological Sciences
Analyses of a multidisciplinary data set, collected in continental shelf waters of the Western Antarctic Peninsula (WAP) during austral summer of January 1993, identified a previously unrecognized forcing mechanism that sets up a physical and chemical structure that supports and assures site-specific diatom-dominated communities and enhanced biological production (Prézelin et al., 2000). This forcing is active when the southern boundary of the Antarctic Circumpolar Current (ACC) flows along the shelf edge, thereby facilitating onshelf bottom intrusions of nutrient-rich Upper Circumpolar Deep Water (UCDW), which then is upwelled or mixed into the upper water column. At times or locations where UCDW …
Prehistoric Marine Mammal Overkill In The Northeastern Pacific: A Review Of New Evidence, Terry L. Jones, William R. Hildebrandt, Douglas J. Kennett, Judith F. Porcasi
Prehistoric Marine Mammal Overkill In The Northeastern Pacific: A Review Of New Evidence, Terry L. Jones, William R. Hildebrandt, Douglas J. Kennett, Judith F. Porcasi
Social Sciences
A model of prehistoric marine mammal overexploitation advanced by Hildebrandt and Jones (1992) for the northeastern Pacific has been challenged by Colten (1995) and Colten and Arnold (1998) who argue that diachronic patterns in faunal remains from California’s Channel Islands reflect climatically-induced decline in marine productivity and local socio-cultural developments not over predation. In this paper, we point out that some Channel Islands faunal trends are consistent with overexploitation, while others reflect methodological variation between studies. Newly available paleoenvironmental data raise questions about previous characterizations of late Holocene marine productivity, while new zooarchaeological findings from Monterey Bay, San Miguel and …
Livestock, Land Use Change, And Environmental Outcomes In The Developing World, R. W. Blake, C. F. Nicholson
Livestock, Land Use Change, And Environmental Outcomes In The Developing World, R. W. Blake, C. F. Nicholson
Agribusiness
No Abstract
Animal Science Stock Report: Winter 2004, Animal Science Department, California Polytechnic State University - San Luis Obispo
Animal Science Stock Report: Winter 2004, Animal Science Department, California Polytechnic State University - San Luis Obispo
Stock Report
No abstract provided.
New Taxa And New Combinations In North American Cirsium (Asteraceae: Cardueae), David J. Keil
New Taxa And New Combinations In North American Cirsium (Asteraceae: Cardueae), David J. Keil
Biological Sciences
Six new varieties are proposed in North American Cirsium (Asteraceae: Cardueae): C. arizonicum (A. Gray) Petrak var. tenuisectum D.J. Keil var. nov., C. eatonii (A. Gray) B.L. Rob. var. viperinum D.J. Keil, var. nov., C. edule Nutt. var. wenatchense D.J. Keil, var. nov., C. occidentale (Nutt.) Jeps. var. lucianum D.J. Keil, var. nov., C. scariosum Nutt. var. robustum D.J. Keil, var. nov., C. scariosum Nutt. var. toiyabense D.J. Keil, var. nov. Additionally, twenty new combinations are presented: C. arizonicum (A. Gray) Petrak var. bipinnatum (Eastw.) D.J. Keil, comb. nov., C. arizonicum (A. Gray) Petrak var. chellyense (R.J. Moore & Frankton) …
Biogeochemical Impact Of Summertime Coastal Upwelling On The New Jersey Shelf, Scott Glenn, Robert Arnone, Trisha Bergmann, Paul W. Bissett, Michael Crowley, Jay Cullen, Joe Gryzmski, Dale Haidvogel, Josh Kohut, Mark A. Moline, Mathew Oliver, Cris Orrico, Robert Sherrell, Tony Song, Alan Weidemann, Robert Chant, Oscar Schofield
Biogeochemical Impact Of Summertime Coastal Upwelling On The New Jersey Shelf, Scott Glenn, Robert Arnone, Trisha Bergmann, Paul W. Bissett, Michael Crowley, Jay Cullen, Joe Gryzmski, Dale Haidvogel, Josh Kohut, Mark A. Moline, Mathew Oliver, Cris Orrico, Robert Sherrell, Tony Song, Alan Weidemann, Robert Chant, Oscar Schofield
Biological Sciences
The alternative hypothesis that observed regions of recurrent hypoxia on the New Jersey inner shelf are more related to coastal upwelling than riverine inputs of nutrients was investigated through a series of multidisciplinary research programs beginning in 1993. The largest variations in ocean temperatures along the New Jersey coast, other than seasonal, are found to be caused by episodic summertime upwelling events driven by southwesterly winds associated with the atmospheric Bermuda High. Off the southern coast of New Jersey, topographic variations associated with ancient river deltas cause upwelled water to evolve into an alongshore line of recurrent upwelling centers that …
Seasonal Steroid Hormone Levels And Their Relation To Reproduction In The Western Diamond-Backed Rattlesnake, Crotalus Atrox (Serpentes: Viperidae), Emily N. Taylor, Dale F. Denardo, David H. Jennings
Seasonal Steroid Hormone Levels And Their Relation To Reproduction In The Western Diamond-Backed Rattlesnake, Crotalus Atrox (Serpentes: Viperidae), Emily N. Taylor, Dale F. Denardo, David H. Jennings
Biological Sciences
We report seasonal variation in steroid hormone levels in blood samples from free-ranging Western Diamond-backed Rattlesnakes (Crotalus atrox), and the relationship between these hormones and events in the reproductive cycle. At a field site in the Sonoran Desert of south-central Arizona, we collected monthly blood samples over the course of two active seasons from 17 radiotelemetered females, and over three active seasons from 103 randomly encountered males. We used radioimmunoassay to measure plasma levels of 17β-estradiol, progesterone, corticosterone, and testosterone in samples from females, and corticosterone and testosterone in samples from males. Non-reproductive females have consistently low levels …
Bioinformatic Approaches For Objective Detection Of Water Masses On Continental Shelves, Mark A. Moline, Matthew J. Oliver, Scott Glenn, Josh T. Kohut, Andrew J. Irwin, Oscar M. Schofield, Paul W. Bissett
Bioinformatic Approaches For Objective Detection Of Water Masses On Continental Shelves, Mark A. Moline, Matthew J. Oliver, Scott Glenn, Josh T. Kohut, Andrew J. Irwin, Oscar M. Schofield, Paul W. Bissett
Biological Sciences
As part of the 2001 Hyper Spectral Coupled Ocean Dynamics Experiment, sea surface temperature and ocean color satellite imagery were collected for the continental shelf of the Mid-Atlantic Bight. These images were used to develop a water mass analysis and classification scheme that objectively describes the locations of water masses and their boundary locations. This technique combines multivariate cluster analysis with a newly developed genetic expression algorithm to objectively determine the number of water types in the region on the basis of ocean color and sea surface temperature measurements. Then, through boundary analysis of the water types identified, the boundaries …
Geography G110: Introduction To Human Geography, Benjamin F. Timms
Geography G110: Introduction To Human Geography, Benjamin F. Timms
Social Sciences
No abstract provided.
Sex–Specific Effects Of Carotenoid Intake On The Immunological Response To Allografts In Guppies (Poecilia Reticulata), Gregory F. Grether, Shinji Kasahara, Gita R. Kolluru, Edwin L. Cooper
Sex–Specific Effects Of Carotenoid Intake On The Immunological Response To Allografts In Guppies (Poecilia Reticulata), Gregory F. Grether, Shinji Kasahara, Gita R. Kolluru, Edwin L. Cooper
Biological Sciences
Rarely are the evolutionary origins of mate preferences known, but, recently, the preference of female guppies (Poecilia reticulata) for males with carotenoid‐based sexual coloration has been linked to a sensory bias that may have originally evolved for detecting carotenoid‐rich fruits. If carotenoids enhance the immune systems of these fishes, as has been suggested for other species, this could explain the origin of the attraction to orange fruits as well as the maintenance of the female preference for orange males. We used the classic immunological technique of tissue grafting to assay a component of the immune response of guppies …
Individual Colour Patches As Multicomponent Signals, Gregory F. Grether, Gita R. Kolluru, Karen Nersissian
Individual Colour Patches As Multicomponent Signals, Gregory F. Grether, Gita R. Kolluru, Karen Nersissian
Biological Sciences
Colour patches are complex traits, the components of which may evolve independently through a variety of mechanisms. Although usually treated as simple, two-dimensional characters and classified as either structural or pigmentary, in reality colour patches are complicated, three-dimensional structures that often contain multiple pigment types and structural features. The basic dermal chromatophore unit of fishes, reptiles and amphibians consists of three contiguous cell layers. Xanthophores and erythrophores in the outermost layer contain carotenoid and pteridine pigments that absorb short-wave light; iridophores in the middle layer contain crystalline platelets that reflect light back through the xanthophores; and melanophores in the basal …
Serpentine: A Model Habitat For Botanical Research In Sri Lanka, Nishanta Rajakaruna, Alan J. M. Baker
Serpentine: A Model Habitat For Botanical Research In Sri Lanka, Nishanta Rajakaruna, Alan J. M. Baker
Biological Sciences
Serpentine (ultramafic) outcrops are found in most parts of the world and for many years have attracted the attention of soil scientists and plant biologists alike due to the unusual nature of both the substrate and the life forms they harbour. In this paper, we introduce serpentine outcrops as a model habitat for botanical studies and review preliminary findings of a recently conducted soil and floristic survey of four of the five known serpentine outcrops in Sri Lanka. We hope that this paper will stimulate much-needed studies, both exploratory and experimental, and point to the immediate need for conservation of …
Epidemiology, Pathogenesis, And Prevention Of Foodbome Vibrio Parahaemolyticus Infections, P.S. Marie Yeung, Kathryn J. Boor
Epidemiology, Pathogenesis, And Prevention Of Foodbome Vibrio Parahaemolyticus Infections, P.S. Marie Yeung, Kathryn J. Boor
Biological Sciences
Since its discovery about 50 years ago, Vibrio parahaemolyticus has been implicated as a major cause of foodborne illness around the globe. V. parahaemolyticus is a natural inhabitant of marine waters. Human infections are most commonly associated with the consumption of raw, undercooked or contaminated shellfish. A few individual V. parahaemolyticus virulence factors, including the thermostable direct hemolysin (TDH) and TDH-related hemolysin (TRH), have been investigated in depth, yet a comprehensive understanding of this organism's ability to cause disease remains unclear. Since 1996, serotype 03:K6 strains have been associated with an increased incidence of gastroenteritis in India and in Southeast …
Effects Of Acid Stress On Vibrio Parahaemolyticus Survival And Cytotoxicity, P.S. Marie Yeung, Kathryn J. Boor
Effects Of Acid Stress On Vibrio Parahaemolyticus Survival And Cytotoxicity, P.S. Marie Yeung, Kathryn J. Boor
Biological Sciences
For several foodbome bacterial pathogens, an acid tolerance response appears to be an important strategy for counteracting acid stress imposed either during food processing or by the human host. The acid tolerance response enhances bacterial survival of lethal acid challenge following prior exposure to sublethal acidic conditions. Previous studies have revealed relationships between a foodbome pathogen's ability to survive acid challenge and its infectious dose. Vibrio parahaemolyticus is capable of causing gastroenteritis when sufficient cells of pathogenic strains are consumed. This study was designed to characterize acid sensitivities and to compare the effect of sublethal acid exposure (adaptation) on survival …
Long Stemmed Total Knee Arthroplasty With Interlocking Screws: A Computational Bone Adaptation Study, Jeffry S. Nyman, Scott J. Hazelwood, Juan J. Rodrigo, R. Bruce Martin, Oscar C. Yeh
Long Stemmed Total Knee Arthroplasty With Interlocking Screws: A Computational Bone Adaptation Study, Jeffry S. Nyman, Scott J. Hazelwood, Juan J. Rodrigo, R. Bruce Martin, Oscar C. Yeh
Biomedical Engineering
The ability of an interlocking screw fixation technique to minimize bone loss related to stress shielding in the tibia was investigated and compared to the abilities of cement and press-fit fixation. Full bony ingrowth has been associated with greater stress shielding than partial ingrowth; therefore, the effect of intimate bonding of the stem to bone on subsequent bone loss was also studied. A damage-and disuse-based remodeling theory was coupled with a two-dimensional finite element model of the tibia to predict changes in bone remodeling following long stemmed total knee arthroplasty (TKA) for four different fixation techniques (cement, press-fit, interlock with …
Digital Imaging Experiences For Undergraduate Engineering Students, Kauser Jahan, John Chen, Shreekanth Mandayam, Robert Krchnavek, Beena Sukumaran, Yusuf Mehta, Jennifer Kadlowec, Paris Von Lockette, Robi Polikar
Digital Imaging Experiences For Undergraduate Engineering Students, Kauser Jahan, John Chen, Shreekanth Mandayam, Robert Krchnavek, Beena Sukumaran, Yusuf Mehta, Jennifer Kadlowec, Paris Von Lockette, Robi Polikar
Mechanical Engineering
Our project is an effort by a multidisciplinary team of engineering faculty members at Rowan University to integrate digital imaging technology (DIT) into the undergraduate engineering curriculum. It builds upon the experience and interest of faculty to promote new topics and innovative methods of teaching. The work is an effort to provide students with the skills directly relevant to the evolving needs of the industry and the marketplace. Projects involve the development of digital imaging curriculum and focus on the creation of a leading edge digital imaging laboratory/studio to facilitate the use of nontraditional learning approaches that encourage interactive learning, …
The Edaphic Factor In The Origin Of Plant Species, Nishanta Rajakaruna
The Edaphic Factor In The Origin Of Plant Species, Nishanta Rajakaruna
Biological Sciences
Although speciation has been a central focus in evolutionary biology for more than a century, there are very few case studies where we have a good understanding of the exact forces that may have acted in the diversification of a group of organisms. In order to examine such forces, botanists have often focused on closely related plants that are found under contrasting soil conditions. The study of such edaphically differentiated plants has provided valuable insight to the role of natural selection in evolution. This paper discusses several key studies that have appeared in the literature in the last half century …
Dietary Patterns And Prostate Cancer Risk In The National Health And Nutrition Examination Survey Epidemiological Follow-Up Study Cohort, Marilyn Tseng, Rosalind A. Breslow, Robert F. Devillis, Regina G. Ziegler
Dietary Patterns And Prostate Cancer Risk In The National Health And Nutrition Examination Survey Epidemiological Follow-Up Study Cohort, Marilyn Tseng, Rosalind A. Breslow, Robert F. Devillis, Regina G. Ziegler
Kinesiology and Public Health
Ecological studies implicate a “Western” diet in prostate cancer development, but whether dietary patterns measured in individuals are associated with risk has not been studied previously. We examined this issue using prospective data from the nationally representative United States Health Examination Epidemiological Follow-up Study. Among 3,779 men followed from 1982– 84 to 1992, 136 incident cases were identified. Using principal component analysis on responses to a 105-item dietary questionnaire, the following three distinct patterns were identified: a vegetable-fruit pattern; a red meat-starch pattern characterized by red meats, potatoes, cheese, salty snacks, and desserts; and a Southern pattern characterized by such …
Mustang Daily, December 13, 2003
Mustang Daily, December 13, 2003
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Mustang Daily, December 3, 2003
Mustang Daily, December 3, 2003
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
A Reporter's Resource And Media Guide To Growth In California, R. Thomas Jones, A.I.A.
A Reporter's Resource And Media Guide To Growth In California, R. Thomas Jones, A.I.A.
Office of the Dean (CAED) Scholarship
This Guide was produced by the California Policy Forum through a collaboration of eight non-profit organizations who share a common commitment to greater public understanding about growth in California: California Center for Regional Leadership, California Futures Network, Center for Governmental Studies, Cities Counties and Schools Partnership, Environmental Policy Center, Latino Issues Forum, League of Women Voters Education Fund, and San Diego Dialogue.
Mustang Daily, December 1, 2003
Mustang Daily, December 1, 2003
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Review Of Human Ecology: Following Nature's Lead By Frederick Steiner, Michael R. Boswell
Review Of Human Ecology: Following Nature's Lead By Frederick Steiner, Michael R. Boswell
City and Regional Planning
No abstract provided.
Heat-Shock Protein 70 (Hsp70) As A Biochemical Stress Indicator: An Experimental Field Test In Two Congeneric Intertidal Gastropods (Genus: Tegula), Lars Tomanek, Eric Sanford
Heat-Shock Protein 70 (Hsp70) As A Biochemical Stress Indicator: An Experimental Field Test In Two Congeneric Intertidal Gastropods (Genus: Tegula), Lars Tomanek, Eric Sanford
Biological Sciences
Although previous studies have demonstrated that heat-shock protein 70 (Hsp70) can be induced by environmental stress, little is known about natural variation in this response over short time scales. We examined how Hsp70 levels varied over days to weeks in two intertidal snail species of the genus Tegula. Sampling was conducted both under naturally changing environmental conditions and in different vertical zones on a rocky shore. The subtidal to low-intertidal T. brunnea was transplanted into shaded and unshaded mid-intertidal cages to assess temporal variation in Hsps under conditions of increased stress. For comparison, the low to mid-intertidal ,T. …
Biological Permanent Magnets, Richard B. Frankel
Biological Permanent Magnets, Richard B. Frankel
Physics
Magnetotactic bacteria orient and migrate along magnetic field lines. Each cell is essentially a self-propelled magnetic dipole. The magnetic properties of these bacteria have been determined by a variety of techniques, including pulsed hysteresis measurements on single cells.
Mustang Daily, November 25, 2003
Mustang Daily, November 25, 2003
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.