An Ipswichian Palaeo-shoreline in Holderness

Previous research has identified a possible palaeo-shoreline extending across the Holderness region of Yorkshire. A 3D modelling project has revealed the extent of this feature under the Quaternary sediments across the entire area. The model also reveals the general palaeo-landscape of the area. This poster illustrates the first full 3D visualisation of this buried shoreline and proposes further investigative work that could be undertake

Investigation into time dependant degradation and atmospheric conditions on the wettability of nylon 6,6 which has undergone CO2 laser surface modification

Modification of the wettability of polymers has been demonstrated previously; however, it is known that the wettability modifications of these materials can degrade or vary over time. This can be seen to be crucial from a commercial point of view as this would indicate that a shelf-life has to be established. But at the same time, atmospheric parameters may affect the contact angle and must therefore be accounted for as a control variable in any long-term study of wettability. In this study four CO2 laser patterned nylon 6,6 samples with differing topographical patterns and one as-received sample were analysed over a 30 week period whilst stored in ambient air. By obtaining the characteristic contact angle every two weeks it was found that the contact angle varied erratically before ultimately increasing for all samples after the 30 weeks. White light interferometry analysis determined that the laser patterning gave rise to peak heights of up to 3 μm with roughness parameters Ra and Sa of up to 0.305 and 0.408 μm, respectively. X-ray photoelectron spectroscopy found that surface oxygen content increased by up to 7 %At. It was identified that there was a significant correlation between changes in barometric air pressure and contact angle, highlighting the need for further study to determine if this is a dominant factor

Anitproton-matter interactions in antiproton applications

By virtue of the highly energetic particles released when they annihilate in matter, antiprotons have a variety of potentially important applications. Among others, these include remote 3-D density and composition imaging of the human body and also of thick, dense materials, cancer therapy, and spacecraft propulsion. Except for spacecraft propulsion, the required numbers of low energy antiprotons can be produced, stored, and transported through reliance on current or near term technology. Paramount to these applications and to fundamental research involving antiprotons is knowledge of how antiprotons interact with matter. The basic annihilation process is fairly well understood, but the antiproton annihilation and energy loss rates in matter depend in complex ways on a number of atomic processes. The rates, and the corresponding cross sections, were measured or are accurately predictable only for limited combinations of antiproton kinetic energy and material species

Anthem Sustainability Project

Data centers are multiplying in number and size as electronic business, communication, collaboration, and recreation continue to increase in popularity. A large amount of electrical power consumed by data center computing equipment is converted to heat, requiring dedicated cooling systems 24 hours a day. Some data center operators have begun taking advantage of this heat instead of expelling it to the atmosphere. This approach not only reduces the electricity costs of these facilities but also minimizes the environmental impact they generate. Anthem has a 2.5 MW data center for which they would like to develop an air-to-air thermal recycle method. Through research of data center cooling and existing thermal recycling methods, an applicable solution has been identified. Air Dumping consists of directly injecting warm server exhaust air into a conditioned space as supplementary heating input during winter months using a fan-powered box (FPB) located within the ceiling of the data center. In order to retain data center pressurization and mass flow of cooling air, replacement (make-up) air must be supplied to the ceiling plenum at a rate equal to the extraction. By replacing warm 90°F server exhaust with cool 60°F make-up air, computer room air handling (CRAH) unit cooling loads will decrease, resulting in additional savings. During the warm months of the year, the team evaluated other potential uses of waste heat, such as thermoelectric power generation.https://scholarscompass.vcu.edu/capstone/1200/thumbnail.jp

The Swift-Hohenberg equation with a nonlocal nonlinearity

It is well known that aspects of the formation of localised states in a one-dimensional Swift--Hohenberg equation can be described by Ginzburg--Landau-type envelope equations. This paper extends these multiple scales analyses to cases where an additional nonlinear integral term, in the form of a convolution, is present. The presence of a kernel function introduces a new lengthscale into the problem, and this results in additional complexity in both the derivation of envelope equations and in the bifurcation structure. When the kernel is short-range, weakly nonlinear analysis results in envelope equations of standard type but whose coefficients are modified in complicated ways by the nonlinear nonlocal term. Nevertheless, these computations can be formulated quite generally in terms of properties of the Fourier transform of the kernel function. When the lengthscale associated with the kernel is longer, our method leads naturally to the derivation of two different, novel, envelope equations that describe aspects of the dynamics in these new regimes. The first of these contains additional bifurcations, and unexpected loops in the bifurcation diagram. The second of these captures the stretched-out nature of the homoclinic snaking curves that arises due to the nonlocal term.Comment: 28 pages, 14 figures. To appear in Physica

Whose Rebellion? Reformed Resistance Theory in America: Part II

Students of the American Founding routinely assert that America\u27s civic leaders were influenced by secular Lockean political ideas, especially on the question of resistance to tyrannical authority. In the first part of this series, we showed that virtually all Reformed writers, from Calvin to the end of the Glorious Revolution, agreed that tyrants could be actively resisted. The only debated question was who could resist them. In this essay, we contend that the Reformed approach to active resistance had an important influence on how America\u27s Founders responded to perceived tyrannical actions by Parliament and the Crown

The magnitude distribution of earthquakes near Southern California faults

We investigate seismicity near faults in the Southern California Earthquake Center Community Fault Model. We search for anomalously large events that might be signs of a characteristic earthquake distribution. We find that seismicity near major fault zones in Southern California is well modeled by a Gutenberg-Richter distribution, with no evidence of characteristic earthquakes within the resolution limits of the modern instrumental catalog. However, the b value of the locally observed magnitude distribution is found to depend on distance to the nearest mapped fault segment, which suggests that earthquakes nucleating near major faults are likely to have larger magnitudes relative to earthquakes nucleating far from major faults

History of marketing thought : an update / BEBR No. 857

Includes bibliographical references (p. 21-26)