3,875 research outputs found

    A review of electric vehicle charge point map websites in the NSR: Interim report

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    This interim report is a review of the EV charge point (station) map websites in the North Sea Region (NSR) with the aim to identify if there are any patterns, or any noticeable gaps on the information presented by the interactive EV charge point tools. For each example of the charge point (station) map website, a review has been undertaken by visiting the charge point (station) map website and recording if the site contains the information, which is of key importance from an EV user perspective, for example an interactive map; any information on the charger power of the charge points (stations); the type of connection of the charge points (stations); the addresses of the charge points (stations) and further helpful details

    Implementing Delay-Tolerant Networking at Morehead State University

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    A thesis presented to the faculty of the College of Science at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Nathaniel J. Richard on April 28, 2017

    The Effect of Maternal Separation and Postnatal Oxytocin Administration on Social Recognition in Adolescent Female Mice

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    A vast body of literature indicates that exposing rodents to maternal separation during infancy results in long - term developmental changes in physiological, behavioral, and psychological domains. Because several previous studies have indicated that maternal separation may be detrimental to the processing and discrimination of social cues, the primary aim of this dissertation was to determine whether separating female infant mouse pups from their mother, but not siblings, for 3 hrs daily, during the first two weeks of life, influences social recognition during adolescence (Experiment 1). This dissertation also sought to evaluate whether postnatal administration of the oxytocin would influence social recognition or the acquisition of social odor preferences in adolescent control and maternally separated female mice (Experiment 2). The results of Experiment 1 showed that, in contrast to control subjects, maternally separated females showed diminished habituation to repeated presentations of a familiar conspecific and significant impairments in the ability to discriminate between a previously encountered and novel mouse during the dishabituation session. In Experiment 2, postnatal oxytocin injections did not substantially affect the expression of either social recognition behavior or social odor preferences by control-reared females during adolescence. By contrast, postnatal oxytocin administration improved the acquisition of social odor preferences, but did not recover social recognition behavior in MS females. The results of this dissertation suggest that altering the early social environment by means of the maternal separation procedure can disrupt the ability to recognize conspecific odor cues, which are fundamental components in establishing and maintaining social relationships later in life

    Controlling Stocks and Flows to Promote Quality: The Environment, With Applications to Physical and Human Capital

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    Our analysis melds two traditional approaches to promoting quality. The first is restoring the stock of quality. The second is curbing its flow of deterioration. Although both approaches are widely used in real world settings, analytic models have tended to focus on one strategy or the other. We consider a class of problems, which we call SFQ' problems, in which both stocks and flows can be controlled to promote quality. We develop our results in the context of environmental quality, drawing on real-world examples from atomic wastes to zebra mussels. But the lessons are general, and we show how they apply to promoting the quality of both physical and human capital. We first study optimal policies in the limiting cases when only abatement or restoration is possible. We then focus on the full SFQ world, where both approaches can be used. We show that the optimal policy employs both instruments. Moreover, when combined optimally, neither strategy takes the form it would in the absence of the other.

    Rings Do not Come from Spring

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    “Ring by Spring” is a common phrase used by undergraduate students at George Fox University to describe the phenomenon where students are engaged before receiving their degree. This research paper aims to understand the factors that lead to students becoming involved in long-term relationships on campus at George Fox. Our research was gathered via a survey of 238 undergraduate students and then analyzed using regression modeling to determine which, if any, factors contributed to students engaging in long-term relationships of more than 6 months. After conducting research, we concluded that three factors were primarily significant in determining the likelihood of a long-term committed relationship: political affiliation, honors college enrollment, and hometown type, with political affiliation having the most economic significance of the three

    A highly efficient engineering tool for three-dimensional scramjet flowfield and heat transfer computations

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    The SIMPLE-based parabolic flow code, SHIP3D, was under development for use as a parametric design and analysis tool for scramjets. Some capabilities and applications of the code are demonstrated, and a report on its current status is given. The focus is on the combustor for which the code was mostly used. Recently, it was also applied to nozzle flows. Code validation results are presented for combustor unit problems involving film cooling, transverse fuel injection, and nozzle test. A parametric study of a film cooled or transpiration cooled Mach 16 combustor is also conducted to illustrate the application of the code to a design problem

    Beyond Ordinary Logit: Taking Time Seriously in Binary Time-Series-Cross-Section Models

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    Researchers typically analyze time-series-cross-section data with a binary dependent variable (BTSCS) using ordinary logit or probit. However, BTSCS observations are likely to violate the independence assumption of the ordinary logit or probit statistical model. It is well known that if the observations are temporally related that the results of an ordinary logit or probit analysis may be misleading. In this paper, we provide a simple diagnostic for temporal dependence and a simple remedy. Our remedy is based on the idea that BTSCS data is identical to grouped duration data. This remedy does not require the BTSCS analyst to acquire any further methodological skills and it can be easily implemented in any standard statistical software package. While our approach is suitable for any type of BTSCS data, we provide examples and applications from the field of International Relations, where BTSCS data is frequently used. We use our methodology to re-assess Oneal and Russett's (1997) findings regarding the relationship between economic interdependence, democracy, and peace. Our analyses show that 1) their finding that economic interdependence is associated with peace is an artifact of their failure to account for temporal dependence and 2) their finding that democracy inhibits conflict is upheld even taking duration dependence into account

    PSpectRe: A Pseudo-Spectral Code for (P)reheating

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    PSpectRe is a C++ program that uses Fourier-space pseudo-spectral methods to evolve interacting scalar fields in an expanding universe. PSpectRe is optimized for the analysis of parametric resonance in the post-inflationary universe, and provides an alternative to finite differencing codes, such as Defrost and LatticeEasy. PSpectRe has both second- (Velocity-Verlet) and fourth-order (Runge-Kutta) time integrators. Given the same number of spatial points and/or momentum modes, PSpectRe is not significantly slower than finite differencing codes, despite the need for multiple Fourier transforms at each timestep, and exhibits excellent energy conservation. Further, by computing the post-resonance equation of state, we show that in some circumstances PSpectRe obtains reliable results while using substantially fewer points than a finite differencing code. PSpectRe is designed to be easily extended to other problems in early-universe cosmology, including the generation of gravitational waves during phase transitions and pre-inflationary bubble collisions. Specific applications of this code will be pursued in future work.Comment: 22 pages; source code for PSpectRe available: http://easther.physics.yale.edu v2 Typos fixed, minor improvements to wording; v3 updated as per referee comment
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