1,463 research outputs found

    Effect of Prey Density on Diurnal Activity and Ovarian Development in \u3ci\u3eCalosoma Calidum\u3c/i\u3e (Coleoptera: Carabidae): Implications for Biological Control of the Gypsy Moth, \u3ci\u3eLymantria Dispar (Lepidoptera: Lymantriidae)\u3c/i\u3e in the Midwest

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    Four feeding treatments were used in the laboratory to study the effects of the availability of prey on diurnal behavior and ovarian development of Calosoma calidum. Activity was closely monitored for six weeks. No significant differences were found between male and female behavior patterns. Diurnal beetle activity was found to be inversely related to prey density; in treatments where prey was available, diurnal activity declined during the course of the experiment. At the end of six weeks, dissections of female beetles showed that ovarian development and fat body quantity were dependent upon the number of prey available for consumption

    Improved Accuracy for Fluid Flow Problems Via Enhanced Physics

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    This thesis is an investigation of numerical methods for approximating solutions to fluid flow problems, specifically the Navier-Stokes equations (NSE) and magnetohydrodynamic equations (MHD), with an overriding theme of enforcing more physical behavior in discrete solutions. It is well documented that numerical methods with more physical accuracy exhibit better long-time behavior than comparable methods that enforce less physics in their solutions. This work develops, analyzes and tests finite element methods that better enforce mass conservation in discrete velocity solutions to the NSE and MHD, helicity conservation for NSE, cross-helicity conservation in MHD, and magnetic field incompressibility in MHD

    Network Infrastructure Essentials Course Development

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    Voice and data cabling enable people around the world to communicate by phone, fax, and computer. Cabling is the basis for virtually every network. Today\u27s voice and data cabling is engineered to balance high performance with cost efficiency. The quality of the service provided by the cabling is directly related to the quality of the installation. Properly installed cabling can provide years of service for networks, in most cases outlasting every device connected to the network. Experience has taught us that too many people don\u27t realize the importance of cable infrastructure. At Alfred State College, in the Computer Engineering Technology curriculum there is not a course specifically targeted at the cable infrastructure. This project was to develop a new course aimed at the cable infrastructure to be implemented into the curriculum. This paper is about the entire course development process from project inception to course implementation. Although this project was to design a network infrastructure course, the process used could be applied to develop a new course for any curriculum

    Simulation Studies of Delta-ray Backgrounds in a Compton-Scatter Transition Radiation Detector

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    In order to evaluate the response to cosmic-ray nuclei of a Compton-Scatter Transition Radiation Detector in the proposed ACCESS space-based mission, a hybrid Monte Carlo simulation using GEANT3 and an external transition radiation (TR) generator routine was constructed. This simulation was employed to study the effects of delta-ray production induced by high-energy nuclei and to maximize the ratio of TR to delta-ray background. The results demonstrate the ability of a Compton-Scatter Transition Radiation Detector to measure nuclei from boron to iron up to Lorentz factors ~ 10^5 taking into account the steeply falling power-law cosmic ray spectra.Comment: Presented at TRDs for the 3rd millennium: Third Workshop on advanced Transition Radiation Detectors for accelerator and space applications, Ostuni, Italy, September 2005, 4 pages, 2 figure

    TETRA Observation of Gamma Rays at Ground Level Associated with Nearby Thunderstorms

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    Terrestrial Gamma ray Flashes (TGFs) -- very short, intense bursts of electrons, positrons, and energetic photons originating from terrestrial thunderstorms -- have been detected with satellite instruments. TETRA, an array of NaI(Tl) scintillators at Louisiana State University, has now been used to detect similar bursts of 50 keV to over 2 MeV gamma rays at ground level. After 2.6 years of observation, twenty-four events with durations 0.02- 4.2 msec have been detected associated with nearby lightning, three of them coincident events observed by detectors separated by ~1000 m. Nine of the events occurred within 6 msec and 3 miles of negative polarity cloud-to-ground lightning strokes with measured currents in excess of 20 kA. The events reported here constitute the first catalog of TGFs observed at ground level in close proximity to the acceleration site.Comment: To be published in Journal of Geophysical Research: Space Phys. 118,

    Compton Scattered Transition Radiation from Very High Energy Particles

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    X-ray transition radiation can be used to measure the Lorentz factor of relativistic particles. At energies approaching gamma = E/mc^2 = 10^5, transition radiation detectors (TRDs) can be optimized by using thick (sim 5 - 10 mil) foils with large (5-10 mm) spacings. This implies X-ray energies >100 keV and the use of scintillators as the X-ray detectors. Compton scattering of the X-rays out of the particle beam then becomes an important effect. We discuss the design of very high energy detectors, the use of metal radiator foils rather than the standard plastic foils, inorganic scintillators for detecting Compton scattered transition radiation, and the application to the ACCESS cosmic ray experiment.Comment: To be published, Astroparticle Physic

    The University Pages Game: Gamified Use of the Linkedin Student & Alumni Tool to Enhance Student Understanding of the Role of Social Media in Building Social Capital

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    Like many other academic disciplines, gamified learning environments are increasing in IS education. Creating and using gamified learning experiences contributes to “flipped classrooms” and is widely viewed as a mechanism for increasing course engagement among millennial students. This paper describes the creation and use of a social media module for a MIS course that uses game elements to introduce students to LinkedIn’s Student and Alumni Tool and how it can be used to build social capital. Because LinkedIn Student & Alumni tool is relatively unknown among students, the social media module, which we call the University Pages Game, also provides instructors with a vehicle for illustrating precepts of the Unified Theory of Acceptance and Use of Technology (UTAUT)

    The Intention to Re-Adopt Collaboration and Communication Technologies by Project Teams

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    The adoption of technology is a subject of perennial interest in information systems. Post- Adoption continuance has recently been an area that has attracted interest. However the adoption of technologies within projects is an understudied area. This paper proposes to examine the reasons for technology adoption in projects where there is some experience with the technology from previous projects. Technology Continuance Theory (TCT) (Liao, Palvia, & Chen, 2009) is adopted in this research as a theoretical lens. The main purpose of this research is to explore if CCTs acceptance and use are consistent with the TCT. The participants of this study are Information Systems professionals. It is expected that the TCT will provide an adequate explanation for intention to adopt CCTs in projects where the technology has been used before
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