1,355,653 research outputs found

    Oral History Interview with Charles Scheffel, May 10, 2000

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    The National Museum of the Pacific War presents an oral interview with Charles Scheffel. Scheffel grew up in Oklahoma and enlisted in the Army ROTC in 1940. He was called up in 1941 after Pearl Harbor. He was allowed to finish out his senior year of college and was married in March 1942. He embarked on the Queen Elizabeth from New Jersey in September 1942. As leader of 200 men, he landed in Scotland and drove with them to Whittington Barracks where they joined with the British 51st Highlanders. He lists the three main survival lessons he learned from the seasoned English soldiers: having a batman to back you up, digging a two-man foxhole, and waiting for the ""crack and thump."" Scheffel how the ""crack and thump"" lesson would later save his life when he was seriously wounded when attacking the Siegfried Line. From England he went to Algeria with the British troops on the Scythia. The ship is torpedoed off the coast limps into Algiers. Scheffel made the decision to leave the British Highlanders and join up with American 9th Division in February 1943. The division went into Tunisia. Then he was sent to spend another month with the British looking for mines. He then returned to the 9th Division and fought until the end of the campaign in Northern Tunisia. He describes taking 700 German POW's back to Algeria to ship to the United States after 175,000 Germans surrendered to the Americans. In Sidi-bel-Abbes, Algeria, he is ordered to set up a safer prositution house in order to minimize the spread of STD's among the soldiers. Next, he leads soldiers in the Sicilian campaign. He describes direct encounters with General Patton during this campaign. From there, the division went to England, then Normandy, France, Belgium, and Germany, before Scheffel was injured and sent back to the United States

    [Dutch and Margaret Scheffel]

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    Black and white photograph of a man and a woman (identified as Dutch Scheffel and Margaret Scheffel) standing with their arms linked under the branches of tree just outside of a building. The two individuals are wearing formal attire. Dutch is wearing a double-breasted suit and a tie. Margaret Scheffel is wearing a white mid-length dress with a flower pinned near the shoulder

    Charels Scheffel

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    Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Scheffel, 54, of 8620 Glenwood Ave., is cive president of Ledbetter Insurance Agency, Inc.

    On the solvability of the mind–body problem

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    The mind-body problem is one of the most enigmatic issues in philosophy that has yet to be resolved. Professor Jan Scheffel from KTH Royal Institute of Technology, Sweden analyses the mind–body problem from a physicalist perspective. He finds that consciousness is epistemologically emergent and shows that this result overlaps with the problem of free will. If a theory for consciousness could be constructed, free will would not exist. Professor Scheffel discloses that the mind–body problem cannot be solved reductionistically and evolves the notion of emergence in an argument for free will.QC 20201013</p

    On the solvability of the mind–body problem [Elektronisk resurs]

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    The mind-body problem is one of the most enigmatic issues in philosophy that has yet to be resolved. Professor Jan Scheffel from KTH Royal Institute of Technology, Sweden analyses the mind–body problem from a physicalist perspective. He finds that consciousness is epistemologically emergent and shows that this result overlaps with the problem of free will. If a theory for consciousness could be constructed, free will would not exist. Professor Scheffel discloses that the mind–body problem cannot be solved reductionistically and evolves the notion of emergence in an argument for free will.</p

    Time-spectral modelling of drift wave turbulence

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    Time spectral methods for initial-value partial differential equations avoid the time stepping being characteristic for temporal finite difference schemes. Large gains in efficiency should then be within reach for problems in plasma physics with widely separated time scales. In the recently developed Generalized Weighted Residual Method GWRM [1], temporal, spatial and parameter domains are all handled using a Chebyshev polynomial solution ansatz. The coefficients of the ansatz are determined using a generalized weighted residual method, for which a new efficient equation system solver has been applied [2]. In addition, subdomain methods for the temporal and spatial domains have been developed [3] and employed successfully in a number of test problems. We will here also present a related method, being based on least square minimization of the residual rather than on the Galerkin method. Both methods are applied to problems in drift wave turbulence from which results will be presented.\\[4pt] [1] Scheffel J, Partial Differential Equations: Theory, Analysis and Applications (Nova Science Publishers) p 1-49, 2011.\\[0pt] [2] Scheffel J and H{\aa}kansson C, Appl. Numer. Math. 59(2009)2430.\\[0pt] [3] Scheffel J and Mirza A, Am. J. of Comp. Math. 2(2012)72.</p

    Inactivation of Matrix-bound Matrix Metalloproteinases by Cross-linking Agents in Acid-etched Dentin.

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    SUMMARY Objectives: Published transmission electron microscopy analysis of in vitro resin-dentin bonds shows that in 44 months almost 70% of collagen fibrils from the hybrid layer disappear. Matrix metalloproteinases (MMPs) play an important role in that process and are thought to be the main factor responsible for the solubilization of dentin collagen. Therefore, this study aimed to evaluate the inactivation of matrix-bound MMPs by two different cross-linking agents, carbodiimide (EDC) or proanthocyanidin (PA), or the MMP-inhibitor, chlorhexidine (CHX), on acid-etched dentin using a simplified MMP assay method. Materials and Methods: Dentin beams (2×1×6 mm) were obtained from mid-coronal dentin of sound third molars and randomly divided into six groups (G) according to the dentin treatment: G1: Deionized water (control); G2: 0.1 M EDC; G3: 0.5 M EDC; G4: 0.5 M EDC + 35% hydroxyethyl methacrylate (HEMA); G5: 5% PA; and G6: 2% CHX. The beams were etched for 15 seconds with 37% phosphoric acid, rinsed, and then immersed for 60 seconds in one of the treatment solutions. The data were expressed both in absorbance values at 412 nm and in MMP-9 activity equivalents. The total MMP activity of dentin was analyzed for one hour by colorimetric assay (Sensolyte). Data were submitted to Wilcoxon nonparametric test and Mann-Whitney tests (p>0.05). Results: All experimental cross-linking solutions significantly reduced MMP activity from 79.8% to 95.2% compared to the control group. No difference was observed among 0.1 M EDC (84.8%), 5% PA (87.6%), and 2% CHX (79.8%). Addition of 35% HEMA to 0.5 M EDC produced inactivation (95.2%) that was similar to that of 0.5 M EDC alone (92.7%). Conclusion: Dentin treatment with cross-linking agents is effective to significantly reduce MMP activity. Mixing 0.5 M EDC and 35% HEMA did not influence EDC inhibitor potential

    Surface-Enhanced Raman Scattering Microspectroscopy Enables the Direct Characterization of Biomineral-Associated Organic Material on Single Calcareous Microskeletons

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    Biominerals are composite materials with inorganic and organic components. The latter provide insights into how organisms control mineralization and, if derived from micro/nannofossils, into past climates. Many calcifying organisms cannot be cultured or are extinct; the only materials available for their study are therefore complex environmental samples in which the organism of interest may only be a minor component. There is currently no method for characterizing the biomineral-associated organic material from single particles within such assemblages, so its compositional diversity is unknown. Focusing on coccoliths, we demonstrate that surface-enhanced Raman scattering microspectroscopy can be used to determine the origin and composition of fossil organic matter at the single-particle level in a heterogeneous micro/nannofossil assemblage. This approach may find applications in the study of micro/nannofossil assemblages and uncultivated species, providing evolutionary insights into the macromolecular repertoire involved in biomineralization
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