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Compact localized states and flat-band generators in one dimension

Physical Review B 2017年第11期95卷 115135-115135页

作者： Wulayimu Maimaiti Alexei Andreanov Hee Chul Park Oleg Gendelman Sergej Flach Center for Theoretical Physics of Complex Systems Institute for Basic Science (IBS) Daejeon 34051 Republic of Korea Basic Science Program Korea University of Science and Technology (UST) Daejeon 34113 Republic of Korea Faculty of Mechanical Engineering Technion Haifa 3200003 Israel New Zealand Institute for Advanced Study Center for Theoretical Chemistry & Physics Massey University Auckland 0745 New Zealand

Flat bands (FB) are strictly dispersionless bands in the Bloch spectrum of a periodic lattice Hamiltonian, recently observed in a variety of photonic and dissipative condensate networks. FB Hamiltonians are fine-tuned networks, still lacking a comprehensive generating principle. We introduce a FB generator based on local network properties. We classify FB networks through the properties of compact localized states (CLS) which are exact FB eigenstates and occupy U unit cells. We obtain the complete two-parameter FB family of two-band d=1 networks with nearest unit cell interaction and U=2. We discover a novel high symmetry sawtooth chain with identical hoppings in a transverse dc field, easily accessible in experiments. Our results pave the way towards a complete description of FBs in networks with more bands and in higher dimensions.

关键词： Electronic structure 1-dimensional systems Electron-correlation calculations Lattice models in condensed matter

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Dynamic operation of water gas shift reaction over Fe2O3/Cr2O3/CuO catalyst in Pd/Al2O3 membrane reactor

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IOP Conference Series: Earth and Environmental science 2018年第1期105卷

作者： Yogi Wibisono Budhi Dhinny Dwi Putri Afifa Husna Hans Kristian Irawan Manabu Miyamoto Shigeyuki Uemiya Chemical Engineering Study Program Institut Teknologi Bandung Jl. Ganesha 10 Bandung Indonesia Department of Materials Science and Technology Gifu University 1-1 Yanagido Gifu 501-1193 Japan

Hydrogen has been considered as promising energy carrier that can be produced from renewable resources, such as biomass through gasification. This process results in producer gas containing CO, CO2, H2, N2, and CH4. The conventional enhancement of hydrogen is typically conducted using several unit operations such as water gas shift reactor (WGSR) and separation unit such as Pressure Swing Adsorption (PSA). Process intensification offers a new method to integrate both WGSR and separation unit into single membrane reactor. This research aimed to investigate the influence of dynamic operation on membrane reactor performance. The steady state fixed bed reactor and membrane reactor were used as base case to judge the performance of dynamic membrane reactor. The water gas shift reaction over Fe2O3/Cr2O3/CuO was carried out at 350°C and 1 atm by varying the feed composition and gas residence time. The feed composition ratio of H2O/CO consisted of 2 and 3 on mole basis, while the gas residence times were 1.2 s and 2.3 s. The membrane reactor consists of shell and tube sides made of Pd/Al2O3 material with technical specification of 10 mm inner diameter, 20 μm Pd thickness supported by alumina, and 10 cm reactor length. The compositions of the feed gas and products were measured using gas analysers such CO gas detector (Bacharach PCA® 3) and H2 gas detector (Cosmos XP-3140). The dynamic operation was performed following the square wave perturbation of the feed gas at switching time of 15 s. The experiment results showed that increasing the feed composition ratio and gas residence time increased the conversion of CO and hydrogen production in the fixed bed reactor and membrane reactor. Higher production of hydrogen also improved the recovery of hydrogen in membrane reactor. The use of membrane reactor increased significantly the conversion of CO when compared to fixed bed reactor. Moreover, the dynamic membrane reactor would give much better performance in term of CO conversio

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Translation and cultural adaptation of tools to assess diverse Asian American and Asian Canadian subgroups: The Asian Cohort for Alzheimer's Disease (ACAD) study

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Alzheimer's & dementia : the journal of the Alzheimer's Association 2025年第6期21卷 e70311页

作者： Haeok Lee Marian Tzuang Tiffany W Chow Younhee Kang Boon Lead Tee Clara Li Eleanor Lam Yian Gu SangA Lee Pei-Chuan Ho Guerry Peavy Eun Hyun Seo Kyungmin Kim Binh Tran Wonjeong Chae Dat Nguyen Namkhue Vo Deanna Dang Jessica Spat-Lemus Yun-Beom Choi Howard Feldman Gyungah R Jun Li-San Wang Wai Haung Yu Van Ta M Park Meyers College of Nursing New York University New York New York USA. Department of Community Health Systems University of California San Francisco School of Nursing San Francisco California USA. Penn Neurodegeneration Genomics Center Department of Pathology and Laboratory Medicine Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA. College of Nursing Graduate Program in System Health Science and Engineering Ewha Womans University Seoul Republic of Korea. Memory and Aging Center Department of Neurology Weill Institute for Neurosciences University of California San Francisco California USA. Global Brain Health Institute University of California San Francisco California USA. Department of Psychiatry Icahn School of Medicine at Mount Sinai New York New York USA. Brain Health and Imaging Center and Geriatric Mental Health Services Centre for Addiction and Mental Health Toronto Ontario Canada. Department of Neurology Columbia University Medical Center New York New York USA. Mo-Im Kim Nursing Research Institute College of Nursing Yonsei University Seoul Republic of Korea. The Leonard and Davis Institute of Health Economics University of Pennsylvania Philadelphia Pennsylvania USA. Department of Neurosciences University of California San Diego La Jolla California USA. Premedical Science College of Medicine Chosun University Gwangju Republic of Korea. Department of Child Development and Family Studies College of Human Ecology Seoul National University Seoul Republic of Korea. American Pacific Health Foundation La Jolla California USA. Graduate School of Public Health Yonsei University Seoul Republic of Korea. Retired Fountain Valley California USA. Alzheimer's Disease Cooperative Study University of California San Diego La Jolla California USA. Institute for Memory Impairments and Neurological Disorders University of California Irvine Irvine California USA. Department of Medicine/Neurology Englewood Health Engle

INTRODUCTION:The availability of sociocultural and language-appropriate study materials and instruments is critical for the assessment of cognitive function in people from diverse backgrounds. This report describes the translations and cultural adaptations of study materials for the Asian Cohort for Alzheimer's Disease (ACAD) study. METHODS:We performed translations and cultural adaptations in accordance with the World Health Organization (WHO) translation guidelines to ensure reliable, complete, and culturally appropriate translations from English to the specified Asian languages. RESULTS:We developed Asian language versions of the ACAD documents (consent, data collection packet, and community and social media outreach materials) reflecting the sociocultural backgrounds of the ACAD target population (i.e., older Asian adults) DISCUSSION: The multistep translation process accounting for distinctive Asian sociocultural and language backgrounds provides an important guideline for Alzheimer's disease and related dementias (ADRD) researchers to promote health literacy and research with underrepresented Asian American and Canadian adults. HIGHLIGHTS:Asian American and Asian Canadian older adults are the fastest-growing populations. A lack of linguistically and culturally appropriate cognitive assessment tools creates barriers for quality healthcare and clinical research. We report the translations and cultural adaptations of the Asian Cohort for Alzheimer's Disease (ACAD) study materials into Chinese, Korean, and Vietnamese. This translation methodology should be extended to Asian Indians, Filipinos, and other Asian American or Asian Canadian populations.

关键词： Alzheimer's disease Asian cognitive assessment community‐based participatory research cultural adaptation dementia translation

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Transverse single-spin asymmetry of charged hadrons at forward and backward rapidity in polarized p+p, p+Al, and p+Au collisions at sNN=200 GeV

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Physical Review D 2023年第7期108卷 072016-072016页

作者： N. J. Abdulameer U. Acharya C. Aidala Y. Akiba M. Alfred V. Andrieux N. Apadula H. Asano B. Azmoun V. Babintsev N. S. Bandara K. N. Barish S. Bathe A. Bazilevsky M. Beaumier R. Belmont A. Berdnikov Y. Berdnikov L. Bichon B. Blankenship D. S. Blau J. S. Bok V. Borisov M. L. Brooks J. Bryslawskyj V. Bumazhnov S. Campbell V. Canoa Roman R. Cervantes M. Chiu C. Y. Chi I. J. Choi J. B. Choi Z. Citron M. Connors R. Corliss Y. Corrales Morales N. Cronin M. Csanád T. Csörgő T. W. Danley M. S. Daugherity G. David C. T. Dean K. DeBlasio K. Dehmelt A. Denisov A. Deshpande E. J. Desmond A. Dion D. Dixit V. Doomra J. H. Do A. Drees K. A. Drees J. M. Durham A. Durum H. En’yo A. Enokizono R. Esha B. Fadem W. Fan N. Feege D. E. Fields M. Finger, Jr. M. Finger D. Firak D. Fitzgerald S. L. Fokin J. E. Frantz A. Franz A. D. Frawley Y. Fukuda P. Gallus C. Gal P. Garg H. Ge M. Giles F. Giordano Y. Goto N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H. Guragain T. Hachiya J. S. Haggerty K. I. Hahn H. Hamagaki H. F. Hamilton J. Hanks S. Y. Han M. Harvey S. Hasegawa T. O. S. Haseler T. K. Hemmick X. He J. C. Hill K. Hill A. Hodges R. S. Hollis K. Homma B. Hong T. Hoshino N. Hotvedt J. Huang K. Imai M. Inaba A. Iordanova D. Isenhower D. Ivanishchev B. V. Jacak M. Jezghani X. Jiang Z. Ji B. M. Johnson D. Jouan D. S. Jumper J. H. Kang D. Kapukchyan S. Karthas D. Kawall A. V. Kazantsev V. Khachatryan A. Khanzadeev A. Khatiwada C. Kim E.-J. Kim M. Kim T. Kim D. Kincses A. Kingan E. Kistenev J. Klatsky P. Kline T. Koblesky D. Kotov L. Kovacs S. Kudo B. Kurgyis K. Kurita Y. Kwon J. G. Lajoie D. Larionova A. Lebedev S. Lee S. H. Lee M. J. Leitch Y. H. Leung N. A. Lewis S. H. Lim M. X. Liu X. Li V.-R. Loggins D. A. Loomis K. Lovasz D. Lynch S. Lökös T. Majoros Y. I. Makdisi M. Makek V. I. Manko E. Mannel M. McCumber P. L. McGaughey D. McGlinchey C. McKinney M. Mendoza A. C. Mignerey A. Milov D. K. Mishra J. T. Mitchell M. Mitrankova Iu. Mitrankov G. Mitsuka S. Miyasaka S. Mizuno M. M. Mondal P. Montuenga T. Moon D. P. Morrison A. Muhammad B. Debrecen University H-4010 Debrecen Egyetem tér 1 Hungary Georgia State University Atlanta Georgia 30303 USA Department of Physics University of Michigan Ann Arbor Michigan 48109-1040 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Department of Physics and Astronomy Howard University Washington DC 20059 USA Iowa State University Ames Iowa 50011 USA Kyoto University Kyoto 606-8502 Japan Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA University of California-Riverside Riverside California 92521 USA Baruch College City University of New York New York New York 10010 USA University of Colorado Boulder Colorado 80309 USA Physics and Astronomy Department University of North Carolina at Greensboro Greensboro North Carolina 27412 USA Saint Petersburg State Polytechnic University St. Petersburg 195251 Russia Vanderbilt University Nashville Tennessee 37235 USA National Research Center “Kurchatov Institute” Moscow 123098 Russia National Research Nuclear University MEPhI Moscow Engineering Physics Institute Moscow 115409 Russia New Mexico State University Las Cruces New Mexico 88003 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794-3800 USA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Jeonbuk National University Jeonju 54896 Korea Weizmann Institute Rehovot 76100 Israel ELTE Eötvös Loránd University H-1117 Budapest Pázmány P. s. 1/A Hungary MATE Laboratory of

Reported here are transverse single-spin asymmetries (AN) in the production of charged hadrons as a function of transverse momentum (pT) and Feynman-x (xF) in polarized p↑+p, p↑+Al, and p↑+Au collisions at sNN=200 GeV. The measurements have been performed at forward and backward rapidity (1.4<|η|<2.4) over the range of 1.5 GeV/c0) in p↑+p collisions, whereas the p↑+Al and p↑+Au results show smaller asymmetries. This finding provides new opportunities to investigate the origin of transverse single-spin asymmetries and a tool to study nuclear effects in p+A collisions.

关键词： Beam polarization Hadron-hadron interactions Polarization phenomena Relativistic heavy-ion collisions Hadrons Spin

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Transverse single-spin asymmetry of midrapidity π0 and η mesons in p+Au and p+Al collisions at sNN=200 GeV

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Physical Review D 2023年第11期107卷 112004-112004页

Presented are the first measurements of the transverse single-spin asymmetries (AN) for neutral pions and eta mesons in p+Au and p+Al collisions at sNN=200 GeV in the pseudorapidity range |η|<0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced in p+p collisions. These measurements show no evidence of additional effects that could potentially arise from the more complex partonic environment present in proton-nucleus collisions.

关键词： Beam polarization Hadron-hadron interactions Polarization phenomena Relativistic heavy-ion collisions Mesons Pions Polarization Spin

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Improving constraints on gluon spin-momentum correlations in transversely polarized protons via midrapidity open-heavy-flavor electrons in p↑+p collisions at s=200 GeV

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Physical Review D 2023年第5期107卷 052012-052012页

作者： N. J. Abdulameer U. Acharya C. Aidala Y. Akiba M. Alfred V. Andrieux N. Apadula H. Asano B. Azmoun V. Babintsev N. S. Bandara K. N. Barish S. Bathe A. Bazilevsky M. Beaumier R. Belmont A. Berdnikov Y. Berdnikov L. Bichon B. Blankenship D. S. Blau J. S. Bok V. Borisov M. L. Brooks J. Bryslawskyj V. Bumazhnov S. Campbell V. Canoa Roman R. Cervantes M. Chiu C. Y. Chi I. J. Choi J. B. Choi Z. Citron M. Connors R. Corliss Y. Corrales Morales N. Cronin M. Csanád T. Csörgő T. W. Danley M. S. Daugherity G. David C. T. Dean K. DeBlasio K. Dehmelt A. Denisov A. Deshpande E. J. Desmond A. Dion D. Dixit V. Doomra J. H. Do A. Drees K. A. Drees J. M. Durham A. Durum H. En’yo A. Enokizono R. Esha S. Esumi B. Fadem W. Fan N. Feege D. E. Fields M. Finger, Jr. M. Finger D. Firak D. Fitzgerald S. L. Fokin J. E. Frantz A. Franz A. D. Frawley Y. Fukuda P. Gallus C. Gal P. Garg H. Ge M. Giles F. Giordano Y. Goto N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H. Guragain T. Hachiya J. S. Haggerty K. I. Hahn H. Hamagaki H. F. Hamilton J. Hanks S. Y. Han M. Harvey S. Hasegawa T. O. S. Haseler T. K. Hemmick X. He J. C. Hill K. Hill A. Hodges R. S. Hollis K. Homma B. Hong T. Hoshino N. Hotvedt J. Huang K. Imai M. Inaba A. Iordanova D. Isenhower D. Ivanishchev B. V. Jacak M. Jezghani X. Jiang Z. Ji B. M. Johnson D. Jouan D. S. Jumper J. H. Kang D. Kapukchyan S. Karthas D. Kawall A. V. Kazantsev V. Khachatryan A. Khanzadeev A. Khatiwada C. Kim E.-J. Kim M. Kim T. Kim D. Kincses A. Kingan E. Kistenev J. Klatsky P. Kline T. Koblesky D. Kotov L. Kovacs S. Kudo B. Kurgyis K. Kurita Y. Kwon J. G. Lajoie D. Larionova A. Lebedev S. Lee S. H. Lee M. J. Leitch Y. H. Leung N. A. Lewis S. H. Lim M. X. Liu X. Li V.-R. Loggins D. A. Loomis K. Lovasz D. Lynch S. Lökös T. Majoros Y. I. Makdisi M. Makek V. I. Manko E. Mannel M. McCumber P. L. McGaughey D. McGlinchey C. McKinney M. Mendoza A. C. Mignerey A. Milov D. K. Mishra J. T. Mitchell M. Mitrankova Iu. Mitrankov G. Mitsuka S. Miyasaka S. Mizuno A. K. Mohanty M. M. Mondal P. Montuenga T. Moon D. P. M Debrecen University H-4010 Debrecen Egyetem tér 1 Hungary Georgia State University Atlanta Georgia 30303 USA Department of Physics University of Michigan Ann Arbor Michigan 48109-1040 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Department of Physics and Astronomy Howard University Washington DC 20059 USA Iowa State University Ames Iowa 50011 USA Kyoto University Kyoto 606-8502 Japan Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA University of California-Riverside Riverside California 92521 USA Baruch College City University of New York New York New York 10010 USA University of Colorado Boulder Colorado 80309 USA Physics and Astronomy Department University of North Carolina at Greensboro Greensboro North Carolina 27412 USA Saint Petersburg State Polytechnic University St. Petersburg 195251 Russia Vanderbilt University Nashville Tennessee 37235 USA National Research Center “Kurchatov Institute ” Moscow 123098 Russia National Research Nuclear University MEPhI Moscow Engineering Physics Institute Moscow 115409 Russia New Mexico State University Las Cruces New Mexico 88003 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794-3800 USA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Jeonbuk National University Jeonju 54896 Korea Weizmann Institute Rehovot 76100 Israel ELTE Eötvös Loránd University H-1117 Budapest Pázmány P. s. 1/A Hungary MATE Laboratory of F

Polarized proton-proton collisions provide leading-order access to gluons, presenting an opportunity to constrain gluon spin-momentum correlations within transversely polarized protons and enhance our understanding of the three-dimensional structure of the proton. Midrapidity open-heavy-flavor production at s=200 GeV is dominated by gluon-gluon fusion, providing heightened sensitivity to gluon dynamics relative to other production channels. Transverse single-spin asymmetries of positrons and electrons from heavy-flavor hadron decays are measured at midrapidity using the PHENIX detector at the Relativistic Heavy Ion Collider. These charge-separated measurements are sensitive to gluon correlators that can in principle be related to gluon orbital angular momentum via model calculations. Explicit constraints on gluon correlators are extracted for two separate models, one of which had not been constrained previously.

关键词： Beam polarization Hadron-hadron interactions Polarization phenomena Relativistic heavy-ion collisions Electrons Positrons Spin

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Anisotropic spin-orbit torque generation in epitaxial SrIrO3 by symmetry design

arXiv

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arXiv 2018年

作者： Nan, T. Anderson, T.J. Gibbons, J. Hwang, K. Campbell, N. Zhou, H. Dong, Y.Q. Kim, G.Y. Reynolds, N. Wang, X.J. Sun, N.X. Choi, S.Y. Rzchowski, M.S. Kim, Yong Baek Ralph, D.C. Eom, C.B. Department of Materials Science and Engineering University of Wisconsin-Madison MadisonWI53706 United States Laboratory of Atomic and Solid State Physics Cornell University IthacaNY14853 United States Department of Physics and Centre for Quantum Materials University of Toronto TorontoONM5S 1A7 Canada Department of Physics University of Wisconsin-Madison MadisonWI53706 United States Advanced Photon Source Argonne National Laboratory ArgonneIL60439 United States Department of Materials Science and Engineering POSTECH Pohang37673 Korea Republic of Department of Electrical and Computer Engineering Northeastern University BostonMA02115 United States Canadian Institute for Advanced Research/Quantum Materials Program TorontoONM5G 1Z8 Canada School of Physics Korea Institute for Advanced Study Seoul130-722 Korea Republic of Kavli Institute at Cornell for Nanoscale Science IthacaNY14853 United States

Spin-orbit coupling (SOC), the interaction between the electron spin and the orbital angular momentum, can unlock rich phenomena at interfaces, in particular interconverting spin and charge currents. Conventional heavy metals have been extensively explored due to their strong SOC of conduction electrons. However, spin-orbit effects in classes of materials such as epitaxial 5d-electron transition metal complex oxides, which also host strong SOC, remain largely unreported. In addition to strong SOC, these complex oxides can also provide the additional tuning knob of epitaxy to control the electronic structure and the engineering of spin-to-charge conversion by crystalline symmetry. Here, we demonstrate room-temperature generation of spin-orbit torque on a ferromagnet with extremely high efficiency via the spin-Hall effect in epitaxial metastable perovskite SrIrO3. We first predict a large intrinsic spin-Hall conductivity in orthorhombic bulk SrIrO3 arising from the Berry curvature in the electronic band structure. By manipulating the intricate interplay between SOC and crystalline symmetry, we control the spin-Hall torque ratio by engineering the tilt of the corner-sharing oxygen octahedra in perovskite SrIrO3 through epitaxial strain. This allows the presence of an anisotropic spin-Hall effect due to a characteristic structural anisotropy in SrIrO3 with orthorhombic symmetry. Our experimental findings demonstrate the heteroepitaxial symmetry design approach to engineer spin-orbit effects. We therefore anticipate that these epitaxial 5d transition-metal oxide thin films can be an ideal building block for low-power spintronics. Copyright © 2018, The Authors. All rights reserved.

关键词： Magnetic moments

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Redesigning the work system of rubber industries based on total ergonomics and ergo-micmac integration

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Journal of Physics: Conference Series 2018年第1期953卷

作者： H Setiawan Industrial Engineering Study Program Science and Technology Faculty Musi Charitas Catholic University Bangau 60 Street Palembang 30113 Phone: +62 0711-378171 South Sumatera - Indonesia website:www.ukmc.ac.id

The factory capacity achievement and the bottleneck reduction of production process at wet-blanket workstations are influenced by the balance of life quality rates and worker's productivity, along with the worker's ability and limitations, tasks, organization and work environment. The life quality of workers is indicated by: the reduction of workload, and fatigue. Meanwhile, work productivity is measured by increasing production results per work shift. The optimization of the quality of life and productivity of workers is achieved by redesigning the system and workstations based on ergonomics integrating Total Ergonomics with Ergo-MicMac (Micro Ergonomics and Macro Ergonomics), which includes redesigning wet-blanket folding worktable, regulating the system pattern of working in pairs, giving official break time, giving extra nutritious intakes such as sweet tea and snack Pempek, giving personal protective equipments, and redesigning physical working *** study was an experimental study, with treatment by subject design involving 30 workers sampled at a workstation condition before and after Ergonomics based redesign. The findings and conclusions of the study were derived from the reduction of the workload by 16.06%, fatigue by 18.84% and the increase of production results per work shift by 20.29%.

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Synthesis and characterization of a novel SCPC-CO3ap cement for pulp capping application in dentistry

Synthesis and characterization of a novel SCPC-CO3ap cement ...

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29th Symposium and Annual Meeting of the International Society for Ceramics in Medicine, ISCM 2017

作者： Cahyanto, Arief Rezano, Andri Zakaria, Myrna Nurlatifah El-Ghannam, Ahmed Department of Dental Materials Science and Technology Faculty of Dentistry Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor45363 Indonesia Department of Anatomy Physiology and Cell Biology Universitas Padjadjaran Jl. Raya Bandung-Sumedang KM 21 Jatinangor45363 Indonesia Department of Endodontology and Operative Dentistry Program Study of Dentistry Universitas Jenderal Achmad Yani Jl. Terusan Jenderal Sudirman Cimahi Indonesia Department of Mechanical Engineering and Engineering Science University of North Carolina at Charlotte CharlotteNC28223 United States

ISBN: (纸本)9783035712209

Silica-calcium phosphate composite (SCPC) and carbonate apatite (CO3Ap) have several superior properties as they are bioactive, bioresorbable and elicit excellent tissue response. The CO3Ap surface layer and hydrated silica developed on the surface of the SCPC may be a key factor for achieving dentin regeneration. On the other hand, calcium hydroxide [Ca(OH)2] have antibacterial properties and biocompatible to dental tissue. Therefore, the combination of CO3Ap, SCPC, and Ca(OH)2 in a bone cement may be favorable as a pulp capping agent that enhances pulp tissue formation and dentin regeneration. The aim of the present study is to synthesize and characterize a novel SCPC-CO3Ap cement for pulp capping application in dentistry. The cement is composed of dicalcium phosphate anhydrous (DCPA), vaterite, Ca(OH)2 and SCPC. The set cement was further characterized by Fourier transform infrared (FT-IR). The microstructure of set cement was examined by scanning electron microscopy (SEM) and the mechanical strength was evaluated by diametral tensile strength (DTS). The FT-IR analyses revealed that the additional bands of carbonate were detected in each sample. The SEM samples of set cement showing more compact surface microstructure of group II compared to other groups. Furthermore, the combination of 5% SCPC and 5% Ca(OH)2 in the cement facilitated a compact structure with superior mechanical strength. The novel SCPC-CO3Ap cement has great potential to be used for pulp capping to facilitate dentin regeneration. © 2017 Trans Tech Publications, Switzerland.

关键词： Microstructure

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Heuristic methodology for horizontal multilayer soil stratification 16

Heuristic methodology for horizontal multilayer soil stratif...

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16th International Conference on Environment and Electrical engineering, EEEIC 2016

作者： Oliveira, Diogo N. Silva, Carlos L.B. Calixto, Wesley P. Alves, Aylton J. Gomes, Viviane Domingos, Jose Luis Graduate Program in Electronic and Automation Systems Engineering University of Brasilia Brasilia Brazil Experimental Technological Research and Study Group Federal Institute of Education Science and Technology Goiania Brazil

ISBN: (纸本)9781509023196

Soil Stratification methods are used to estimate soil geoelectrical parameters. Several stratification methods are available, but reducing the error estimation introduced by such methods still poses as a challenge. The purpose of this work is to present a heuristic algorithm applied to the optimization of geoelectrical prospection process. The goal is to estimate soil parameters, such as the amount of layers, thickness and resistivity of each layer in an optimal and automated manner. The algorithm consists of analyzing the sensitivity of sampling space parameters. The propose methodology shows error reduction above 75% between the experimental and theoretical curves of the analyzed soils. The results are presented and discussed. © 2016 IEEE.

关键词： Heuristic algorithms

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