4,612 research outputs found
A new species of lizard in the genus Caledoniscincus (Reptilia: Scincidae) from far northwest New Caledonia
No full textSadlier, Ross A., Whitaker, Anthony H., Wood, Perry L., Bauer, Aaron M. (2014): A new species of lizard in the genus Caledoniscincus (Reptilia: Scincidae) from far northwest New Caledonia. Zootaxa 3795 (1): 45-60, DOI: 10.11646/zootaxa.3795.1.
Austin Papers: Series II, Part II, 1818-1847
No full textCopy of transcript for a letter from Emily M. Austin Bryan Perry to James E. B. Austin encouraging James to visit Missouri with his wife, and passing along news that many of the papers documenting Stephen F. Austin's business with Col. Anthony Butler were lost when Woodson's house burned down
Austin Papers: Series II, Part II, 1818-1847
No full textCopy of transcript for a letter from Will C. Carr to Emily M. Austin Bryan Perry offering his condolences and confirming that he placed a copy of the receipt in full from Col. Anthony Butler on record in Herculaneum
Nobel Laureate Anthony J Leggett: A scientometric portrait
No full textThis paper attempts to analyse the publication productivity of Anthony J. Leggett, the 2003 Nobel Prize winner in physics. His contributions peaked in 1987, 1994, and 1998 with 10 papers each. He had 194 publications during 1964 - 2004 in domains like Superfluid 3He (65), Foundations of Quantum Mechanics (36), Dissipative Quantum Systems (24), Atomic Alkali Gases (18), and Miscellaneous (51)which were analysed for authorship pattern with his 70 collaborators. Most active collaborators with Anthony J Leggett were: A. Garg with six papers and A. O. MCaldeira, D. M. Ginsberg, D. J. Vanharlingen , F. Sols, S.Takagi and D. A. Wollman with five papers each. His productivity coefficient was 0.60 which clearly indicates that his productivity
increased after 50 percentile age. The highest degree of collaboration (1) for Anthony J. Leggett was found during 1964, 1971 and 1983. Journals have been the most preferred channel of communication, where as many as 139 papers out of 194 have been published. The core journals publishing his papers were: Phys. Rev. Leu. (42), Phys. Rev. B (9), J. Low Temp. Phys. (8),Phys. Rev. A (7), Ann. Phys. (6), Foundations of physics (6), J. Phys.(5), Prog. Theor: Phys. (5), and Rev. Mod. Phys. (5).Publication density was 3.02 and publication concentration was 3.59
Biogeochemical redox proxies in sediments from Dotternhausen during the Toarcian (Early Jurassic)
No full textAuthor contributions:
The lead author is Angela L. Coe. Measurements were performed by Stephan M. Harding, with supervision of Angela L. Coe and Anthony S. Cohen. Measurements were gathered, processed and analysed by Itzel Ruvalcaba Baroni
Biogeochemical redox proxies in sediments from Yorkshire during the Toarcian (Early Jurassic)
No full textAuthor contributions:
The lead author is Angela L. Coe. Measurements were performed by Stephan M. Harding, with supervision of Angela L. Coe and Anthony S. Cohen. Measurements were gathered, processed and analysed by Itzel Ruvalcaba Baroni
Diffusion coefficients at infinite dilution in n-alkane solvents at temperatures to 573 K and pressures to 3.5 MPa
No full textTypescript (photocopy).Diffusion in liquids is a very important phenomenon in all mass transfer operations. Although there are many correlations available to predict diffusivities in liquids, almost all of these are developed from data at ambient or close to ambient conditions. There is a severe lack of data on diffusion coefficients at high temperatures and pressures. Consequently, theoretical treatments are also lacking for diffusivity at high temperatures. In this study, a Taylor dispersion apparatus was constructed for measuring diffusion coefficients in liquids at temperatures between 298 and 573 K and pressures between atmospheric and 3500 kPa. Because the diffusion coefficients are known to be a strong function of molar volume and viscosity, the apparatus was designed to measure the viscosity and density of the liquids, also. The diffusion coefficients of hydrogen, carbon monoxide, carbon dioxide, octane, decane, dodecane, tetradecane, and hexadecane were measured in the solvents heptane, dodecane, and hexadecane between 298 and 567 K and at 1400 and 3450 kPa. The density and viscosity of dodecane and hexadecane were also measured at all conditions. These data are the first for these systems at temperatures above 343 K, and represents a significant extension of the high temperature data base for diffusion coefficients. A rough hard sphere kinetic theory approach has been developed to analyze the data and develop a predictive equation. Some of the other theoretical treatments have been shown to be less desirable due to the difficulty in predicting the necessary parameters or to the failure of the basic assumptions of the theory. Methods for estimating the parameters needed to predict the diffusivity from the rough hard sphere theory have been provided, and the resulting equations have been shown to work better than previously available predictive equations. In addition, the theory given in this study also predicts other diffusivities given in the literature for chemically similar systems. This study provides the first systematic effort to generalize the rough hard sphere theory for an important class of compounds
Ultrastructure of oligochaete cocoons and polychaete tubes suggest an evolutionary link
No full textDespite divergence of several hundred million years, polychaetes and oligochaetes produce tube-like structures. Specifically, polychaetes secrete protective dwellings and/or brood tubes for reproduction, while oligochaetes secrete egg cases or cocoons. Cocoon secretion in oligochaetes is preceded by hypertrophy of glandular Type-II and Type-III cells in a specialized epithelial region, the clitellum. Histological data from the polychaete Phragmatopoma caifornica identified parapodial cells similar to clitellum Type-II cells that may be responsible for the tube sheath that lines the worm’s “sandcastle” home. Further, tubes and cocoons appear to display similar physical properties. Both remain stable when challenged against thermal extremes of heat and cold, proteases and chaotropic agents. Additionally, ultrastructural aspects of tubes and cocoons appear related. Oligochaete cocoons comprise a fibrous cocoon wall sealed at each end with an operculum (i.e., glue-like plugs). Likewise, the polychaete tube sheath from P. californica comprises fibrous shards similar to that observed in the cocoon secreted by Erpobdella obscura. These observations may suggest that the secretory cells and biomaterials that characterize oligochaete cocoons are transformative, and were derived from an ancestral, tube-dwelling polychaete that acquired the ability to seal the ends of its tube.M.S.Includes bibliographical referencesby Anthony M. Ross
Catering for exceptional students in mathematics
No full textRecently, there has been considerable attention to the development of the mathematical capability of Australasian citizens. It is widely accepted that all citizens should be numerate. That is, they should be able to cope with the everyday mathematical demands of life at school, in the home, at work, and in the community. Additionally, there is a need for adequate numbers of citizens to develop the high-level mathematical capability necessary to support and advance our technologically-oriented society (Howard, 2001; MacGillivray, 2000). Thus, the dual goals of contemporary mathematics education are (1) to develop a numerate citizenry, and (2) to develop a society with sufficient high-level mathematical capability. However, to achieve these goals, we must understand how to adequately cater for exceptional students, such as those who have learning difficulties and those who are gifted in mathematics. While students with learning difficulties and gifted students clearly differ substantively, they are both "at risk" of underachieving in mathematics (Diezmann, Thornton, & Watters, 2003). This chapter provides an overview of the context for the education of students with learning difficulties and mathematically gifted students, reviews the associated research, and suggests avenues for future mathematics education research to support exceptional students
Microglia and macrophages of the central nervous system: the contribution of microglia priming and systemic inflammation to chronic neurodegeneration
No full textMicroglia, the resident immune cells of the central nervous system (CNS), play an important role in CNS homeostasis during development, adulthood and ageing. Their phenotype and function have been widely studied, but most studies have focused on their local interactions in the CNS. Microglia are derived from a particular developmental niche, are long-lived, locally replaced and form a significant part of the communication route between the peripheral immune system and the CNS; all these components of microglia biology contribute to maintaining homeostasis. Microglia function is tightly regulated by the CNS microenvironment, and increasing evidence suggests that disturbances, such as neurodegeneration and ageing, can have profound consequences for microglial phenotype and function. We describe the possible biological mechanisms underlying the altered threshold for microglial activation, also known as 'microglial priming', seen in CNS disease and ageing and consider how priming may contribute to turning immune-to-brain communication from a homeostatic pathway into a maladaptive response that contributes to symptoms and progression of diseases of the CNS
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