1,704 research outputs found
Oral History Interview: Woodrow W. Mosley
This interview is one of a series conducted concerning Lincoln County History. Woodrow Mosley was a coal miner for several decades, and he discusses: his personal background; his family (including a father who worked for the Kingston-Pocahontas Coal Company in Kingston, West Virginia); his experiences coal mining and coal mining in general; life in a mining community; labor unions and a brief mention of some strikes; individuals such as Don Chafins, Cap Adkins, Charley Bates, Warney Chapman, & John Salstrom; mining methods, equipment, and procedures (including strip mining); livestock and farming; wells and well water; his retirement; road maintenance and building; gas lines; and other topics.https://mds.marshall.edu/oral_history/1333/thumbnail.jp
Tracking a hysteretic and disorder-broadened phase transition via the electromagnon response in improper ferroelectrics
We demonstrate that electromagnons can be used to directly probe the nature of a phase transition between magnetically ordered phases in an improper ferroelectric. The antiferromagnetic/paraelectric to antiferromagnetic/ferroelectric phase transition in Cu1-xZnxO (x=0, 0.05) alloys was tracked via the electromagnon response using terahertz time-domain spectroscopy, on heating and cooling through the phase transition. The transition was found to exhibit thermal hysteresis, confirming its first-order nature, and to broaden under the influence of spin-disorder upon Zn substitution. The energy of the electromagnon increases upon alloying, as a result of the non-magnetic ions modifying the magnetic interactions that give rise to the multiferroic phase and electromagnons. We describe our findings in the context of recent theoretical work that examined improper ferroelectricity and electromagnons in CuO from phenomenological and first-principles approaches
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Rapid heating tensile tests of solution-annealed Incoloy 903 charged with hydrogen and tritium
Rapid heating tensile tests from room temperature to above 1000{degree}C have been performed on specimens of solution-annealed Incoloy 903 charged with hydrogen and tritium. Absorbed hydrogen had very little effect on tensile properties. Internal helium from radioactive decay of absorbed tritium drastically decreased ductility above 700{degree}C
The effect of processing on the dispersion of fat in an ice cream mixture
Publication authorized June 26, 1926."This experimental work... was submitted by W. K. Mosley in fulfillment of the thesis requirement for the degree of Master of Arts in the University of Missouri"--P. [3].Digitized 2007 AES.Includes bibliographical references (page 15)
Childhood Precursors of Adult Morbidity and Mortality In Developing Countries : Implications for Health Programs
This paper will examine only one aspect of this health transition in developing countries. It will look at the emerging health problems among the adults and the aged and assess to what degree these chronic diseases and disabilities might be a consequence of infectious diseases and other adverse conditions which were experienced decades earlier in infancy and childhood. A recognition of these relationships can enhance our understanding of the cost-effectiveness and cost benefits of programs to promote child health. Child health interventions are not only cost-effective in saving lives and preventing disabilities in the short run but, more importantly, in the long run can result in major cost savings to health systems and accelerate national development by improving the health and productivity of these children when they become adults.A version of this paper was first presented at the Workshop on Policy and Planning Implications of the Epidemiological Transition In Developing Countries sponsored by The Committee on Population of the National Academy of Sciences Washington, D.C. November 20.22, 1991.
Partial support for the work was provided by the U.S. Agency for International Development under Child Survival Cooperative Agreement DPE-5951-A-00-5051
CHILD HEALTH DIAGNOSIS
This paper was commissioned by the Pan Arab Project for Child Development (PAPCHILD), League of Arab States and supported by a grant from the United Nations UNSTAT
Enhanced polarisation control and extreme electric fields: advances in terahertz spectroscopy applied to anisotropic materials and magnetic phase transitions
This thesis reports advances in terahertz time-domain spectroscopy, relating to the development of new techniques and components that enhance the experimentalist's control over the terahertz polarisation state produced by photoconductive emitters, and in utilising the dynamic magnetoelectric response at THz frequencies, in the form of electromagnons, to probe material properties at a transition between two magnetically ordered phases.
Two methods of controlling the terahertz polarisation state are reported: The first method is based upon mechanical rotation of an interdigitated photoconductive emitter, and is implemented in a rotatable-polarisation terahertz time-domain spectrometer, the calibration of which is demonstrated to produce a highly uniform polarisation state at all angles. This method is then demonstrated experimentally to identify the orientations of the normal modes of propagation in the plane of birefringent samples, to extract the full complex refractive index along these directions, and to investigate the optical selection rules of an absorbing material. The second method presents a new photoconductive emitter design, based upon separate interdigitated pixel elements for the generation of the horizontally and vertically polarised components of the terahertz pulses, that permits rotation of the polarisation state solely by electrical control. The design, fabrication and experimental verification of the device is reported, demonstrating polarisation control on timescales orders of magnitude faster than those achievable in mechanical rotation methods.
A method of using the electromagnon response in Cu
Nonclassical 2-photon interference with separate intrinsically narrowband fibre sources
In this paper, we demonstrate a source of photon pairs based on
four-wave-mixing in photonic crystal fibres. Careful engineering of the phase
matching conditions in the fibres enables us to create photon pairs at 597 nm
and 860 nm in an intrinsically factorable state showing no spectral
correlations. This allows for heralding one photon in a pure state and hence
renders narrow band filtering obsolete. The source is narrow band, bright and
achieves an overall detection efficiency of up to 21% per photon. For the first
time, a Hong-Ou-Mandel interference with unfiltered photons from separate fibre
sources is presented.Comment: 10 pages, 6 figure
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