205,984 research outputs found
A study of the reactivation of landsliding at Barton-on-Sea, Hampshire, following stabilisation works in the 1960s
No full textThe mostly clay cliffs of Barton-on-Sea, Hampshire, comprise inhomogeneous strata of the Bracklesham, Barton and Headon Hill Formations, overlain unconformably by Plateau Gravels, and have a long history of erosion and instability. Heavily-engineered stabilisation works involving a 1,500m-long sheet-piled wall and cut-off drain were installed in the 1960s but a number of catastrophic failures of the wall have occurred at locations along the Barton frontage since then. This report is concerned with the failures at Cliff House Hotel / Tom’s Garden and at Hoskins Gap West.Extensive monitoring of the cliffs over the past sixty years has produced a large and diverse dataset which has been compiled, analysed and assessed in this report. This includes inclinometer, piezometer and rainfall records, topographic surveying, aerial and ground photography, borehole and exposures logs, consultants’ reports, engineering drawings and newspaper articles. This report identifies characteristics of the key periods of activity at the two locations and compares and contrasts them. Maps of the areas of activity, cliff-top retreat, revetment movement and drainage patterns are provided. Fieldwork undertaken for the project includes the logging of three cliff exposures and the surveying of four cross-section profiles. Drawing on the information available it charts the progress of instability in the two study areas, suggests possible mechanisms for the failures and offers a prediction of future activity based upon the mechanisms described
Letters from Joseph P. Barton to sons Amasa and Joseph, 1886-1887
No full textTypescript copies of two letters from Joseph P. Barton of Paragonah: one dated August 1886 to his son Amasa Barton of Rincon, San Juan County, the second dated July 16, 1887 to son Joseph, sent from Utah State Penitentiary where he was confined as a violator of the anti-polygamy law, expressing grief over the death of son Amas
Oral history interview with Kent Barton
No full textOral history interview by Anne P. Peterson with Kent Barton. Topics include: Businesspeople, Entrepreneurship, Economics and business, Social life and customs, Business, Industry, Labor, Commerce, City and Town Life, Education, Genealogy; Agriculture; Business ethics, Work ethic, Norbest Turkeys, Nutri-Mulch, Politics, Specialty food industry; Energy resources, Human resource development, Communication, and Moroni Feed Company; Mona (Utah)
Thermoelastic investigation of damage evolution in small stainless steel pipework
No full textThis paper describes work on damage studies in small cold worked pipe sections. The effect of material heat treatment on the sensitivity of the thermoelastic constant to exposure to plastic strain is assessed. It is shown that strain hardening plays an important role in modifying the thermoelastic constant. X-ray computed tomography has been use to assess the geometry of the deformed cross-section of pipe and to identify the presence of damage. Finally the potential of thermoelastic stress analysis for damage assessment in the pipe work is established
Curve fitting of mixed-mode isopachics
No full textRecent work has focused on exploiting the observation that the stress-sum contours
(isopachics), obtained from TSA, in the vicinity of the tip take the form of a simple curve – the
cardioid. The analysis made use of the cardioid nature of the isopachics by deriving
expressions for the SIFs in terms of the cardioid area and the positions of certain tangents to
the curve. Both Genetic Algorithms (GAs) and Differential Evolution (DE) have also proved
successful for parameter estimation, but some of the curve-fits indicated that the cardioid form
was inappropriate for the base model, particularly for mixed-mode cracks. The effect of cracktip
interaction has been explored and shows this has a small effect on the cardioid form. New,
higher resolution infra-red detectors have become available since the original data was
collected, so the object of the current paper is to use new techniques to extract the cardioid
form and use a GA to perform the curve fitting
Barton, William-Residence P.1
No full textNorthwest corner 3rd Ave and B street. Courtesy: Barton Howell. Built ca. 1865
Incorporation of Co in dolomite structure: coupled single crystal and EPMA investigations of cobaltoan dolomites from Tenke-Fungurume, D.R. of Congo
No full textCobaltoan dolomite from Tenke-Fungurume, D.R. of Congo, can host up to 20% mol Co (Barton et al., 2014).
Incorporation of Co in dolomite is definitely more relevant than in cobaltoan calcite, because of the closeness in ionic
radius between Mg2+ (0.72) and Co2+ (0.745) (Shannon, 1976). A set of crystals from this locality was studied through
coupled EPMA and single crystal structural refinements to investigate structural changes induced by Co incorporation
in dolomite structure. As expected, Co incorporation reflects in a clear direct trend in cell volume expansion, with the a
cell parameter more sensible than the c cell parameter to Co content.
Dolomite structure can be described (Reeder & Wenk, 1983) through “layers” of Me2+ alternating with “layers”
hosting CO3 groups along the c axis, approximating an hexagonal close packing. Both the Mg and Ca polyhedra are
trigonally distorted, namely elongated along the threefold axis. A scrutiny of Me-O bond distances shows a direct
correlation between the volume of (Mg,Co) coordination polyhedron and the unit cell volume, whereas the volume of
Ca polyhedron is inversely related to the Co content hosted in Mg polyhedron. In fact, when the (Mg,Co) polyhedron
expands, the oxygen atom is shifted towards Ca cation, resulting in a contraction of the Ca coordination polyhedron.
The distortion of Ca and (Mg,Co) coordination polyhedra is less pronounced in “basal” edges, namely those
polyhedron edges lying perpendicular to the c axis, respect to “lateral” edges. The expansion of the “basal” edges of the
Mg polyhedron with increasing Co content is more relevant than the slight expansion of the Mg lateral edges; the same
holds for the contraction of Ca polyhedron. This is in agreement with the pronounced variation of the a cell parameter,
directly related to the length of the “basal” edges. In dolomites, because of the difference in length between the longer
Ca-O and shorter (Mg,Co)-O bonds, a “rotation” of the octahedra and of the CO3 groups along the ternary axis, is
necessary to accomplish a fit. Their orientation in calcite structure, hosting Ca octahedra all of the same size, can be
assumed as starting zero point for comparison. Following Reeder & Wenk (1983) the mean rotation angle of CO3
groups is a convenient measure of the net rotations of all the components: in cobaltoan dolomites the net rotation angles
of CO3 groups decreases with increasing Co content
Marriage record of Jackson, Barton P. and Howell, Abbie May
No full textMarriage license for Barton P. Jackson and Abbie May Howell. J.B. Ley was the officiant
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