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Search Results: 1 - 10 of 158582 matches for " William F. Harrison "
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Gerald Taylor, Diccionario normalizado y comparativo: Chachapoyas - Lamas, Paris (L'Harmattan) 1979.
William F. Harrison
Lexis , 1982,
Abstract: El artículo no presenta resumen.
Language Support for Declarative Future Commitments
William Harrison
Computer Science , 2011,
Abstract: Sequential programming and work-flow programming are two useful, but radically different, ways of describing computational processing. Of the two, it is sequential programming that we teach all programmers and support by programming languages, whether in procedural, objectoriented, or functional paradigms. We teach workflow as a secondary style of problem decomposition for use in special situations, like distributed or networked processing. Both styles offer complementary advantages, but the fact that they employ radically different models for ownership of continuations interferes with our ability to integrate them in a way that allows them to be taught and used in a single programming language. This paper describes a programming language construct, declarative future commitments, that permit better integration of the two.
Supramolecular Hydrogen-Bond Motifs in Chiral and Racemic Molecular Salts: A Comparison of (S)-2-Methyl Piperizinium Hydrogen Phosphite Monohydrate, C5H14N2·HPO3·H2O and (R,S)-2-Methyl Piperizinium Hydrogen Phosphite 2.23 Hydrate, C5H14N2·HPO3·2.23H2O
William T. A. Harrison
Crystals , 2011, DOI: 10.3390/cryst1040236
Abstract: The crystal structures of C 5H 14N 2·HPO 3·H 2O ( 1) and C 5H 14N 2·HPO 3·2.23H 2O ( 2) are described and compared. Compound 1 contains homochiral ( S)-2-methyl piperizinium cations, hydrogen phosphite ions and water molecules. The components are linked by N–H?O and O–H?O hydrogen bonds into a three-dimensional network. In compound 2, racemic ( R, S)-2-methyl piperizinium cations combine with the same anions and water molecules to generate a far more complex, high symmetry “supramolecular” structure, which features distinctive R 6 6(12) loops and helical C(2) chain hydrogen-bonding motifs involving the water molecules. Crystal data: 1 (C 5H 17N 2O 4P), M r = 200.18, orthorhombic, P2 12 12 1 (No. 19), Z = 4, a = 8.564 (5) ?, b = 9.593 (6) ?, c = 11.607 (6) ?, V = 953.6 (9) ? 3, R( F) = 0.066, wR( F 2) = 0.081. 2 (C 5H 19.47N 2O 5.24P), M r = 222.49, trigonal, (No. 148), Z = 18, a = 31.075 (2) ?, c = 6.1875 (4) ?, V = 5174.5 (6) ? 3, R( F) = 0.044, wR( F 2) = 0.107.
(S)-2-Methylpiperazinediium dichloride 0.42-hydrate
William T. A. Harrison
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808010519
Abstract: The cations and anions of the chiral title compound, C5H14N22+·2Cl ·0.42H2O, are linked by N—H...Cl hydrogen bonds into chains propagating in [100], which contain R42(14) loops.
Tetraaquabis(biuret-κ2O,O′)gadolinium(III) trichloride
William T. A. Harrison
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808008660
Abstract: In the title compound, [Gd(C2H5N3O2)2(H2O)4]Cl3, which is isostrucutural with its yttrium analogue, the Gd3+ ion (site symmetry 2) is bonded to eight O atoms (arising from two O,O′-bidentate biuret molecules and four water molecules) in a distorted square-antiprismatic arrangement. A network of N—H...O, N—H...Cl and O—H...Cl hydrogen bonds helps to establish the packing, leading to a three-dimensional network. One of the chloride ions has site symmetry 2.
Tetraaquabis(biuret-κ2O,O′)yttrium(III) trichloride
William T. A. Harrison
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808008659
Abstract: In the title compound, [Y(C2H5N3O2)2(H2O)4]Cl3, the Y3+ ion (site symmetry 2) is bonded to eight O atoms (arising from two O,O′-bidentate biuret molecules and four water molecules) in a distorted square-antiprismatic arrangement. A network of N—H...O, N—H...Cl and O—H...Cl hydrogen bonds help to establish the packing, leading to a three-dimensional network. One of the chloride ions has site symmetry 2.
Hydroxonium triaquabis(biuret-κ2O,O′)dichloridolanthanum(III) dichloride dihydrate
William T. A. Harrison
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808010349
Abstract: In the title compound, (H3O)[LaCl2(C2H5N3O2)2(H2O)3]Cl2·2H2O, the La atom is bonded to seven O atoms (arising from two O,O′-bidentate biuret molecules and three water molecules) and two chloride ions in an irregular arrangement. A network of N—H...O, N—H...Cl, O—H...O and O—H...Cl hydrogen bonds helps to establish the packing, leading to a three-dimensional network. The La atom, one Cl atom and four O atoms lie on a crystallographic mirror plane.
“To Sing with the Spirit:” Psalms, Hymns and the Spirituality of Late Eighteen Century American Presbyterians
William Harrison Taylor
Religions , 2013, DOI: 10.3390/rel4040657
Abstract: This paper contends that the contemporary discussion among theologians regarding the relationship between theology and spirituality can offer new insight into the eighteenth century religious world. This theological discussion has wrestled with, among other things, the questions of whether theology and spirituality are mutually exclusive and what exactly their relationship looks like. Resoundingly, theologians such as Alister McGrath, J. I. Packer, and Sandra Schneiders have concluded that any separation of the two represents a false dichotomy within Christianity. Accordingly, Christians are called to “the quest for a fulfilled and authentic Christian existence, involving the bringing together of the fundamental ideas of Christianity and the whole experience of living on the basis of, and within, the scope of the Christian faith.” Sound theology, then, necessitates living by the Spirit and vice versa. The benefit of this theological position for religious history lies in its reevaluation of the common categorization of Christians as either theologically or spiritually focused. By heeding the call of contemporary theologians and blurring these lines of distinction, historians can afford eighteen century American Christians the chance to better define themselves. Considered in this light, the actions of the Presbyterians, for instance, are freed from the manipulative “social control” framework as one of the “establishmentarian” churches. Instead, the Presbyterians reveal characteristics generally reserved for the democratically charged “sectarians,” such as a robust spiritual life compelled by music.
The Use of Percutaneous Lumbar Fixation Screws for Bilateral Pedicle Fractures with an Associated Dislocation of a Lumbar Disc Prosthesis
William D. Harrison,David J. Harrison
Case Reports in Orthopedics , 2013, DOI: 10.1155/2013/676017
Abstract: Study Design. Case report. Objective. To identify a safe technique for salvage surgery following complications of total disc replacement. Summary of Background Data. Lumbar total disc replacement (TDR) is considered by some as the gold standard for discogenic back pain. Revision techniques for TDR and their complications are in their infancy. This case describes a successful method of fixation for this complex presentation. Methods and Results. A 48-year-old male with lumbar degenerative disc disease and no comorbidities. Approximately two weeks postoperatively for a TDR, the patient represented with acute severe back pain and the TDR polyethylene inlay was identified as dislocated anteriorly. Subsequent revision surgery failed immediately as the polyethylene inlay redislocated intraoperatively. Further radiology identified bilateral pedicle fractures, previously unseen on the plain films. The salvage fusion of L5/S1 reutilized the anterior approach with an interbody fusion cage and bone graft. The patient was then turned intraoperatively and redraped. The percutaneous pedicle screws were used to fix L5 to the sacral body via the paracoccygeal corridor. Conclusion. The robust locking screw in the percutaneous screw allowed a complete fixation of the pedicle fractures. At 3-year followup, the patient has an excellent result and has returned to playing golf. 1. Introduction Lumbar disc replacement is becoming a popular surgical choice in the management of discogenic back pain. At present, there are good short- and medium-term outcomes in patients receiving lumbar disc prostheses as opposed to the more traditional interbody vertebral fusion. Long-term outcomes are currently under the spotlight as the practice of modern disc replacement enters the third decade of usage. The indications for total disc replacement (TDR) remain specific and the procedure should only be done in valid cases of discogenic back pain in selected patients. Charité III (LINK SB, DePuy, Warsaw, IN, USA) was the TDR of choice in much of America and Europe during the late 90s and onwards. The design is modular, comprising two metal endplate components fashioned with convex articulating surfaces which oppose a central polymer inlay component. Much of the long-term data for TDR has been generated from the largely successful Charité III design. Complications following TDR are poorly understood and remedies to salvage function following complications are in their infancy. Short-term complications of TDR include disruption to vascular and neurological structures during the approach,
The Neighborhood Scale Variability of Airborne Particulates  [PDF]
William A. Harrison, David Lary, Brian Nathan, Alec G. Moore
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.65045
Abstract: Airborne particulates play a central role in both the earth’s radiation balance and as a trigger for a wide range of health impacts. Air quality monitors are placed in networks across many cities glob-ally. Typically these provide at best a few recording locations per city. However, large spatial var-iability occurs on the neighborhood scale. This study sets out to comprehensively characterize a full size distribution from 0.25 - 32 μm of airborne particulates on a fine spatial scale (meters). The data are gathered on a near daily basis over the month of May, 2014 in a 100 km2 area encompassing parts of Richardson, and Garland, TX. Wind direction was determined to be the dominant factor in classifying the data. The highest mean PM2.5 concentration was 14.1 ± 5.7 μg·m-3 corresponding to periods when the wind was out of the south. The lowest PM2.5 concentrations were observed after several consecutive days of rainfall. The rainfall was found to not only “cleanse” the air, leaving a mean PM2.5 concentration as low as 3.0 ± 0.5 μg·m-3, but also leave the region with a more uniform PM2.5 concentration. Variograms were used to determine an appropriate spatial scale for future sensor placement to provide measurements on a neighborhood scale and found that the spatial scales varied, depending on the synoptic weather pattern, from 0.8 km to 5.2 km, with a typical length scale of 1.6 km.
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