66,251 research outputs found
Mechanics of inhomogeneous turbulence and interfacial layers
No full textThe mechanics of inhomogeneous turbulence in and adjacent to interfacial layers bounding turbulent and non-turbulent regions are analysed. Different mechanisms are identified according to the straining by the turbulent eddies in relation to the strength of the mean shear adjacent to, or across, the interfacial layer. How the turbulence is initiated and the topology of the region of turbulence are also significant factors. Specifically the cases of a layer of turbulence bounded on one, or two, sides by a uniform and/or shearing flow, and a circular region of a rotating turbulent vortex are considered and discussed.
The entrainment processes at fluctuating interfaces occur both at the outer edges of turbulent shear layers, with and without free-stream turbulence (e.g. jets, wakes and boundary layers), at internal boundaries such as those at the outside of the non-turbulent core of swirling flows (e.g. the ‘eye-wall’ of a hurricane) or at the top of the viscous sublayer and roughness elements in turbulent boundary layers. Conditionally sampled data enables these concepts to be tested. These concepts lead to physically based estimates for critical modelling parameters such as eddy viscosity near interfaces, entrainment rates, maximum velocity and displacement heights
A study of religious involvement among university students : literal, anti-literal, and mythological religious involvement
No full textIncludes bibliographical references.A sample of 210 university students were clustered into relatively homogenous religious orientations, based on their scores on three scales of religious involvement, delineated by Hunt (1972): Literal, Anti-literal and Mythological. The three groups were compared on the following measures: (i) Background variables; (ii) Thouless (1935): Intensity of Belief Scale; (iii) Rokeach (1960): Dogmatism Scale; (iv) 16 PF by Cattell et al. (1970) and (v) King and Hunt (1972 b): Scales for Basic Religious Dimensions. Hunt's notion that pro-religious subjects of different involvement might differ in terms of personality variables was supported
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The vertical structure of oceanic Rossby waves: a comparison of high-resolution model data to theoretical vertical structures
Full text linkTests of the new Rossby wave theories that have been developed over the past decade to account for discrepancies between theoretical wave speeds and those observed by satellite altimeters have focused primarily on the surface signature of such waves. It appears, however, that the surface signature of the waves acts only as a rather weak constraint, and that information on the vertical structure of the waves is required to better discriminate between competing theories. Due to the lack of 3-D observations, this paper uses high-resolution model data to construct realistic vertical structures of Rossby waves and compares these to structures predicted by theory. The meridional velocity of a section at 24° S in the Atlantic Ocean is pre-processed using the Radon transform to select the dominant westward signal. Normalized profiles are then constructed using three complementary methods based respectively on: (1) averaging vertical profiles of velocity, (2) diagnosing the amplitude of the Radon transform of the westward propagating signal at different depths, and (3) EOF analysis. These profiles are compared to profiles calculated using four different Rossby wave theories: standard linear theory (SLT), SLT plus mean flow, SLT plus topographic effects, and theory including mean flow and topographic effects. Our results support the classical theoretical assumption that westward propagating signals have a well-defined vertical modal structure associated with a phase speed independent of depth, in contrast with the conclusions of a recent study using the same model but for different locations in the North Atlantic. The model structures are in general surface intensified, with a sign reversal at depth in some regions, notably occurring at shallower depths in the East Atlantic. SLT provides a good fit to the model structures in the top 300 m, but grossly overestimates the sign reversal at depth. The addition of mean flow slightly improves the latter issue, but is too surface intensified. SLT plus topography rectifies the overestimation of the sign reversal, but overestimates the amplitude of the structure for much of the layer above the sign reversal. Combining the effects of mean flow and topography provided the best fit for the mean model profiles, although small errors at the surface and mid-depths are carried over from the individual effects of mean flow and topography respectively. Across the section the best fitting theory varies between SLT plus topography and topography with mean flow, with, in general, SLT plus topography performing better in the east where the sign reversal is less pronounced. None of the theories could accurately reproduce the deeper sign reversals in the west. All theories performed badly at the boundaries. The generalization of this method to other latitudes, oceans, models and baroclinic modes would provide greater insight into the variability in the ocean, while better observational data would allow verification of the model findings
Rudiocyon Hunt 2011, new genus
No full text<i>Rudiocyon</i>, new genus <p> TYPE SPECIES: <i>Rudiocyon amplidens</i>, new species.</p> <p>INCLUDED SPECIES: Only the type species.</p> <p>DISTRIBUTION: Early or mid-Arikareean of Oregon.</p> <p> ETYMOLOGY: From the latinized Greek, <i>kyon</i>, for ‘‘dog,’’ and for Rudio Creek, the locality in north-central Oregon where the holotype was discovered.</p> <p> DIAGNOSIS: Differs from <i>Temnocyon</i> by absence of the m1 metaconid; from <i>Mammacyon</i> and <i>Delotrochanter</i> by a small, short m2 relative to m1 (table 6, ratio E/F,1.9); and from <i>Delotrochanter</i> by a narrow, compressed p4 (not posteriorly broad). See tables 1–2.</p> <p> DISCUSSION: The genus includes a single species represented by a partial mandible with massive teeth (p4–m2) that define the taxon. A small m 2 in <i>Rudiocyon</i> (table 6, ratio E/F,,1.9) precludes assignment to <i>Mammacyon</i> (table 6, ratio E/F, 1.57–1.6), a genus defined by a large, elongate m2. Nonetheless, the genus may have evolved from an earlier less derived species that gave rise to both <i>Mammacyon</i> and <i>Rudiocyon</i>. Similarity to cheek teeth of <i>T. ferox</i> suggests a possible alternative derivation for <i>R. amplidens</i>. <i>Rudiocyon amplidens</i> is considered somewhat younger than the age of the Deep Creek tuff (27.9 ± 0.57 Ma); the probable site of collection occurs 10–15 m above a local ash on Rudio Creek identified as a correlative of the Deep Creek tuff.</p>Published as part of <i>Hunt, Robert M., 2011, Evolution Of Large Carnivores During The Mid-Cenozoic Of North America: The Temnocyonine Radiation (Mammalia, Amphicyonidae), pp. 1-153 in Bulletin of the American Museum of Natural History 2011 (358)</i> on page 54, DOI: 10.1206/358.1, <a href="http://zenodo.org/record/4610748">http://zenodo.org/record/4610748</a>
We're going on a Bear Hunt
No full textThe purpose of this chapter is to explore with Annie aspects of Neuro Dramatic
Play (NDP) ( Jennings 2011 ), in relation to story and Jennings’s notion of Embodiment Project
Role (EPR), from a multi- sensory informed approach, using the great children’s classic We’re
Going on a Bear Hunt ( Rosen & Oxenbury 1993 ). I will consider a range of multi- sensory ways
of working using messy play, drama and rhythmic storytelling ( Jennings 2011 :41) in relation
to Rosen’s story and the potential impact that this has upon the overall personal, cognitive and
social development of Annie as a 20- month- old
EFFECT OF HUNTING FREQUENCY ON DUCK ABUNDANCE, HARVEST, AND HUNT QUALITY IN MISSISSIPPI
Full text linkWaterfowl hunting is important historically, culturally, and economically in Mississippi and North America. I evaluated effect of hunting frequency (2 or 4 days/week) on duck abundance, harvest, and hunters’ perceived quality of their experience on Mississippi Wildlife Management Areas (WMAs). Neither relative abundance nor harvest of all ducks, mallard (Anas platyrhynchos), northern shoveler (A. clypeata), or green-winged teal (A. crecca) differed between experimental hunting frequencies. Duck harvest increased with hours spent afield. Hunters’ perceived quality did not differ between hunting frequencies but was greatest when hunters harvested \u3e 4 ducks/ day and increased with harvest of larger sized ducks. I suggest WMAs may be hunted 4 days/week without impacting duck abundance, harvest, or hunt quality. I recommend continued evaluations of hunting frequency on duck abundance, harvest, and hunt quality to sustain science-guided management of waterfowl hunting on Mississippi public lands
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Inviscid mean flow through and around groups of bodies
No full textGeneral estimates are derived for mean velocities through and around groups or arrays of fixed and moving bodies, in unbounded and bounded domains, which lie within a defined perimeter. Robust kinematic flow concepts are introduced, namely the Eulerian spatial mean velocity u−E in the fluid volume between the bodies, the Eulerian flow outside the group, \bmu(0)E, and the Lagrangian mean velocity of material surfaces or fluid particles as they pass through the group of bodies (u−(S)L, u−(P)L). The Eulerian mean velocity is related to the momentum in the fluid domain, and is mainly influenced by fast moving regions of the flow. The Lagrangian mean velocity weights slowly moving regions of flow and is related to how material sheets deform as they are advected through groups of bodies. When the bodies are well-separated, the interstitial Eulerian and Lagrangian mean velocities (u−(I)E, u−(I)L), are defined and calculated in terms of the far-field contributions from the velocity or displacement field within the group of bodies.
In unbounded flow past well-separated bodies situated within a rectangular perimeter, the difference between the Eulerian and Lagrangian mean velocity is negligible (as the void fraction of the bodies, α→0). Within wide and short rectangular arrays, the Eulerian mean velocity is faster than the free-stream velocity U because most of the incident flow passes through the array and u−E=U(1−α)−1. Within long and thin rectangular arrays (and other cases where the reflux velocity is negligible), the Eulerian mean velocity, u−E=U(1−(1+Cm)α)/(1−α), is slower than the free-stream velocity, because most of the incident flow passes around the array. For a spherical or circular arrays of bodies, the particle Lagrangian mean velocity is u−(P)L=U(1+Cmα)−1 and differs from u−E. These calculations are extended to examine the mean and interstitial flow through clouds of bodies in bounded channel flows.
The new concepts are applied to calculate the mean flow and pressure between and outside clouds of bodies, the average velocity of bubbly flows as a function of void fraction, and the tendency of clouds of bubbles to be distorted depending on their shape
China's hunt for oil in Africa in perspective
Full text linkChina is concerned about the security of its sea-lanes for imports and desires to diversify its oil supplies from the Middle East in order to sustain economic growth. These concerns have sparked China’s interest in trying to ensure oil supplies from as many sources as possible and in reducing its overwhelming reliance on seaborne imports of oil, which, in China’s view, is considered less vulnerable to disruption than oil arriving by tankers. In this context, China has turned the eyes on the emerging oil and gas fields in Africa. Through its high-profile oil diplomacy, China has been successful in developing its access to African oil and gas resources. However, China’s oil diplomacy in Africa has been roundly criticized in Western capitals. Washington increasingly perceives that Beijing’s ties to the so-called rogue states undermine the U.S. goals of isolating or punishing these states that fail to prompt democracy, limit nuclear proliferation or respect human rights. This paper argues that China’s hunt for oil in Africa has been exaggerated by partly-informed commentators, sometimes based on erroneous information, not to mention those that deliberately paint the distorted picture. That said, the paper suggests that, in pursuing its oil diplomacy, Beijing should take into account many factors including Washington concerns, in particular when U.S. concerns also reflect those of a large section of the international community. The paper points out that devoting more resources to build a better future for all and help to eliminate the fear of another Rwanda or Darfur is a positive form that Beijing should take in its engagement with Africa. This way of engagement would be considered more positive by the broad community of states, and helps to enhance China’s security of energy supply and at the same time would significantly reduce one source of tension with Washington. Overall, it will greatly benefit Africa as well as China.China; Oil hunt in Africa; Energy policy
P. L. Hunt letter to Warren G. Harding, December 17, 1919
No full textIn this letter dated December 17, 1919, P. L. Hunt, president of The First National Bank, writes to Senator Warren G. Harding to express his support of his recent announcement of his candidacy for president, and especially notes his reservations about the League of Nations proposed by President Woodrow Wilson. Hunt asks about the Transportation Act (1920), which he refers to as the Cummins Bill, which restored private ownership and management of railroads as they operated before the railway system was nationalized during World War I.
This letter is part of the Warren G. Harding Papers (MSS 345). This collection includes correspondence, business records, and other materials documenting Harding’s business career as owner and editor-in-chief of The Daily Marion Star, as well as the various stages of his political career. A significant portion of the collection, and what’s available on Ohio Memory, highlights his 1920 presidential campaign, spanning just before publicly announcing his candidacy to handily defeating Ohio Governor James M. Cox in the election. Correspondents include both Ohio and national businessmen, political figures, and ordinary citizens writing with questions, support, congratulatory notes, and campaign advice. Some of the most interesting insights into the tumultuous political climate in the U.S., the extreme factionalism within the Republican Party in Ohio, and Harding’s campaign strategies are described in letters between Harding and his campaign manager, Harry M. Daugherty. Some of the topics addressed include women’s suffrage, Prohibition, the League of Nations, African American representation and issues, and lingering peace negotiations following World War I
land n / landsman hunt
No full textlandsman nThe seal fishery was carried out in Newfoundland and Labrador and the Gulf of St Lawrence in two ways. .. [The other fishery was] the landsmen hunt, which was carried out by small boats ranging from 18 feet to 65 feet..PRINTED ITEM DNE Sup JUN 6 1988[check] WK G. M. StoryUsed I and SupUsed Sup3Not usedlandman, shoreman, stationer, landsman hunt, sealer, seal hunt, landsman sealer, sealer, sealer1 nChecked by Jordyn Hughes on Thu 09 Jul 201
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