5,369 research outputs found
The Sacramental Theory in John 19:26-27
No full textAbout the author: Father Theodore Koehler, S.M., of the Seminaire Marianiste at the University of Fribourg, Switzerland, studied under Father Neubert
Christian Insight
No full textVery Rev . John A. Elbert, S.M., is Graduate Dean of Arts and Sciences, Professor of Philosophy, creator of the Interdisciplinary Seminar, former President of the University of Dayton. He is the author of a number of books
Mary and American Protestants
No full textAbout the author: Father William Cole, S.M., is Professor and director of graduate work in Theological Studies at the University of Dayton. He has long been associated with the Marian Library
Overcoming the Obstacles to Counselling Research
No full textThe author of this article, Brother Marion F. Belka, S.M., is Vice President of St. Mary\u27s University in San Antonio, Texas, and President of the National Catholic Guidance Conference
Microstructure and micromechanics of the sea urchin, Colobocentrotus atratus
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections."June 2011." Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (p. 128-132).The purpose of this research is to study the porous microstructure and the micromechanics of the exoskeletal armor of the helmet urchin, Colobocentrotus atratus. Its unusual reduction in spines forms a smooth tiling of millimeter-sized, flattened polygonal protective aboral spines. Each aboral spine articulates with the underlying test via a ball-and-socket joint and the microstructure of each aboral spine is a porous network of single-crystal magnesium-doped calcite with a few percent of intercalated organic. Methods of microstructural characterization and simulation were developed through the investigation of the urchin's microstructure and the finite element model. With the high resolution scans from X-ray microcomputed tomography at the Advanced Photon Source at Argonne National Laboratory, Beamline 2BM, visualization and characterization of a complex porous network in three-dimensions was possible, providing a more quantitative insight into the geometry of the microstructure not characterized before in urchin biology literature. The galleried stereom of the individual spines were found to possess a gradient in volume fraction with distance from the socket ranging from 90% at the ball-and-socket joint to 50% at the outer surface. The axial direction of the galleried structure radiates outwardly from the socket and terminated perpendicular to the outer surface of the aboral spine. Additionally, with the microcomputed tomography results, an efficient and more accurate finite element model of an entire aboral spine along with the microstructural properties was created. The galleried mesh (average pore size ~ 15 microns) was modeled using three-dimensional elastic finite element analysis that consisted of a microstructurally-based parametric representative volume element with periodic boundary conditions. Various loading configurations were simulated to obtain anisotropic stiffness tensors and resulted in an orthotropic effective mechanical behavior with the stiffness in the plane transverse to the long axis of the galleried microstructure (E1, E2) approximately half the stiffness in the axial direction (E3). With parametric simulations, E3 was found to decrease linearly from 0.87 of the solid elastic modulus (Es) to 0.34 of Es as the volume fraction decreases from 0.88 to 0.46. In the transverse direction, E1 and E2 also decrease linearly from 0.49 of Es to 0.18 of Es within the same range of volume fraction. Spatial gradients in density were also modeled, corresponding to the gradient in porosity in the aboral spine. From simulation of blunt indentation by both a conical indenter and flat plate indenter, the graded porosity of the microstructure exhibits an expected lower overall stiffness and lower stress state than the solid material, but also serves to increase the strains near the exterior surface of the aboral spine while reducing the strains near the joint. This open-pore structure and trabeculae alignment results in a directional strengthening due to inhomogeneous deformations in the porous structure and provides resistance against blunt impacts and containment of penetration into the surface of the aboral spine.by Ting-Ting Chen.S.M
In Vivo Acticity of Bupropion at the Human Dopamine Transporter as Measured by Positron Emission Tomography
No full textArticle title: In vivo acticity of bupropion at the human dopamine transporter as measured by positron emission tomography. Reference: BPS7603 Journal title: Corresponding author: Dr. S.M. Learned-Coughlin First author: Dr. S.M. Learned-Coughlin Citation</p
Direct numerical simulation of the flow around a wing section at moderate Reynolds numbers
No full textA three dimensional direct numerical simulation has been performed to study the flow around the asymmetric NACA-4412 wing at a moderate chord Reynolds number (Rec = 400, 000) with an angle of attack of 5◦ . The flow case under investigation poses numerous challenges for a numerical method due to the wide range of scales and complicated flow physics induced by the geometry. The mesh is optimized and well resolved to account for such varying scales in the flow. An unsteady volume force is used to trip the flow to turbulence on both sides of the wing at 10% chord. Full turbulent statistics are computed on the fly to further investigate the complicated flow features around the wing. The present simulation shows the potential of high-order methods in simulating complex external flows at moderately high Reynolds numbers
Estimation of nonlinear mechanical properties of atherosclerotic plaques
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.Includes bibliographical references (leaves 57-59).A numerical method has been developed to estimate the mechanical properties of atherosclerotic plaques by combining genetic algorithm with finite element methods. Plaque images derived from optical coherence tomography were employed to construct finite element models which were subsequently used in conjunction with a genetic algorithm to determine the parameters in a nonlinear constitutive model. A new multi-frame scheme is introduced to better perform the estimation on a nonlinear mechanical model and reduce the effects of noise. Results show while it is feasible to estimate the nonlinear mechanical properties of plaque, the accuracy can depend on various factors, especially the noise. KEY woRDS: FEM, atherosclerotic plaques, parameter estimation, Mooney-Rivlin model, optical coherence tomography, image noise.by Ting F. Zhu.S.M
Unity of the World of Men
No full textVery Reverend John A. Elbert, S.M., is the former Provincial Superior of the Cincinnati Province of the Society of Mary and was President of the University of Dayton from 1938 until 1944. He is the author of half a dozen books and numerous articles, several of which have appeared in this review
The Cult of Kannon, The Goddess of Mercy, in Japanese Buddhism
No full textAloysius Soden, S.M., M.A. Member of the Marianist Province of New York; spent most of his professional life as missionary in Japan; author of several monographs about the Orient; served in Navy intelligence during World War II as interpreter; now in St. Joseph\u27s School, Yokohama
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