Quantum fluids in nanopores

We describe calculations of the properties of quantum fluids inside nanotubes of various sizes. Very small radius ($R$) pores confine the gases to a line, so that a one-dimensional (1D) approximation is applicable; the low temperature behavior of 1D $^4$He is discussed. Somewhat larger pores permit the particles to move off axis, resulting eventually in a transition to a cylindrical shell phase--a thin film near the tube wall; we explored this behavior for H$_2$. At even larger $R\sim 1$ nm, both the shell phase and an axial phase are present. Results showing strong binding of cylindrical liquids $^4$He and $^3$He are discussed.Comment: 8 pages, 4 figures, uses ws-ijmpb, graphicx, xspace; minor revisions from version published in Proc. 13th Intl. Conference on Recent Progress in Many-Body Theories (QMBT13), Buenos Aires, 200

Hominin cognitive and behavioural complexity in the Pleistocene: assessment through identity, intentionality and visual display

The Social Brian Hypothesis predicts the cognitive ability of hominin species by utilising estimated brain and group sizes in relation to an ordinal scale of cognitive complexity expressed as orders of intentionality. The Social Brain Hypothesis predictions however, have never been correlated to the archaeological behavioural record in order to ascertain their behavioural validity. This thesis is concerned with testing the cognitive predictions of the Social Brain Hypothesis against the material culture evidence of hominin behaviour through a new theoretical construct termed the Identity Model. The Identity Model offers a theoretical perspective on the construction of individual and group identity through the Palaeolithic linked to a scale of cognitive complexity shared by the Social Brain Hypothesis. Embedded within the Identity Model are the notions that material culture / behaviour could be imbued with culturally significant social meaning once the ability to construct proxies had been achieved, this in turn feeds into the development of language from non-linguistic societies based on visual display to fully grammatical syntax. Using technological modes and widely held beliefs within the academic community relating to hominin behavioural practice and artefact manufacture as a heuristic, the Identity Model (and through the orders of intentionality, the Social Brain Hypothesis) has been related to the archaeological record, and the predictions preliminarily tested though a series of eleven case studies stretching circa 600,000 – 24,000 years before present. The results of the lithic analysis show that despite common perception (and the Social Brain Hypothesis predictions on cognitive potential), the use of lithic artefacts in actively negotiating hominin social relationships may not have had their genesis with the mode 2 (Acheulean) biface, but rather may be more securely associated with mode 3 prepared core technologies and the advent of the composite tool and pigment use. This in turn intimates that the Social Brain Hypothesis predicts the potential cognitive ability of ancient hominin species whilst the archaeology, through the filter of the Identity Model, illustrates the realised cognitive ability, and the two are not necessarily mutually exclusive. Based on the results and discussions of this thesis, it would appear that cognitive potential must therefore be in place before it can be realised, further suggesting that hominin physiological changes must occur before behavioural changes become evident within the archaeological record

Coordination Between Autophagy and the Heat Shock Response: Evidence From Exercise in Animals and Humans

Proteins play a critical role in nearly every biological activity. In consequence, organismal health and homeostasis often hinges on the ability of intracellular regulatory systems to sustain the quality and function of these diverse, structurally complex macromolecules. Correct protein function depends on correct form, and during periods of destabilizing cellular stress, protein quality is managed in part by the heat shock response, which acts to support, isolate, and reform new or damaged proteins, and in part by the autophagic recycling of abnormal proteins, cytotoxic protein aggregates, and terminally damaged organelles. We conducted a pooled analysis of available research in humans and rodents regarding heat shock and autophagic activity through the unique proteostatic challenges presented by acute exercise and the post-exercise progression from catabolism to anabolism. This analysis reinforces a model of regulatory coordination between these protein management pathways, offering interspecies support for an Hsp70-moderated transition away from the presiding catabolic influence of autophagy in the immediate post-exercise window, toward an anabolic phase of restoration and remodeling. This relationship has been demonstrated with direct human cellular research, and may help shed light on the molecular underpinning of epidemiological associations between health and physical activity. Differential responses were also observed in these two primary proteostatic systems according to exercise intensity and tissue of origin, which may have important implications for research design, and perhaps eventually for exercise prescription

Jewish Sacred and Secular Masterpieces

Nathan Munson and Judith Cole present a concert featuring Jewish Sacred and Secular Masterpieces.https://digitalcommons.kennesaw.edu/musicprograms/2245/thumbnail.jp

New Approaches to Filling the Gap in Tuberculosis Drug Discovery

For the first time in decades, say the authors, there is a tuberculosis drug pipeline, but the paucity of candidates is still cause for alarm

A Spatial Characterization of the Sagittarius Dwarf Galaxy Tidal Tails

We measure the spatial density of F turnoff stars in the Sagittarius dwarf tidal stream, from Sloan Digital Sky Survey (SDSS) data, using statistical photometric parallax. We find a set of continuous, consistent parameters that describe the leading Sgr stream's position, direction, and width for 15 stripes in the North Galactic Cap, and 3 stripes in the South Galactic Cap. We produce a catalog of stars that has the density characteristics of the dominant leading Sgr tidal stream that can be compared with simulations. We find that the width of the leading (North) tidal tail is consistent with recent triaxial and axisymmetric halo model simulations. The density along the stream is roughly consistent common disruption models in the North, but possibly not in the South. We explore the possibility that one or more of the dominant Sgr streams has been mis-identified, and that one or more of the `bifurcated' pieces is the real Sgr tidal tail, but we do not reach definite conclusions. If two dwarf progenitors are assumed, fits to the planes of the dominant and `bifurcated' tidal tails favor an association of the Sgr dwarf spheroidal galaxy with the dominant Southern stream and the `bifurcated' stream in the North. In the North Galactic Cap, the best fit Hernquist density profile for the smooth component of the stellar halo is oblate, with a flattening parameter q = 0.53, and a scale length of r_0 = 6.73. The Southern data for both the tidal debris and the smooth component of the stellar halo do not match the model fits to the North, although the stellar halo is still overwhelmingly oblate. Finally, we verify that we can reproduce the parameter fits on the asynchronous Milkyway@home volunteer computing platform.Comment: 35 pages, 8 figures, 9 tables. Accepted for publication in The Astrophysical Journa

A Hypothetical Model of Food Loss Generation from Grocery Store to Customer

Master's Thesis in System DynamicsGEO-SD351INTL-MNINTL-JUSINTL-MEDINTL-KMDMASV-SYSDYINTL-PSYKINTL-HFINTL-S