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FAIR Convergence Matrix:Optimizing the Reuse of Existing FAIR-Related Resources

Data Intelligence 2020年第1期2卷 158-170,313页

作者： Hana Pergl Sustkova Kristina Maria Hettne Peter Wittenburg Annika Jacobsen Tobias Kuhn Robert Pergl Jan Slifka Peter McQuilton Barbara Magagna Susanna-Assunta Sansone Markus Stocker Melanie Imming Larry Lannom Mark Musen Erik Schultes GO FAIR International Support and Coordination Office LeidenThe Netherlands Centre for Digital Scholarship Leiden University LibrariesLeidenThe Netherlands Max Planck Computing and Data Facility Gießenbachstraße 285748 GarchingGermany Leiden University Medical Center Leiden2333 ZAThe Netherlands department of Computer Science Vrije Universiteit AmsterdamDe Boelelaan 11051081 HV AmsterdamThe Netherlands Czech Technical University in Prague Faculty of Information Technology(FIT CTU)16000 Prague 6Czech Republic Oxford e-Research Centre Department of Engineering SciencesUniversity of OxfordOxford OX13PJUK Environment Agency Austria A-1090 ViennaAustria tib Leibniz Information Centre for Science and Technology HannoverGermany SURF Utrecht 3511 EPThe Netherlands Corporation for National Research Initiatives(CNRI) RestonVirginia 20191USA Stanford Center for Biomedical Informatics Research StanfordCA 94305USA

The FAIR principles articulate the behaviors expected from digital artifacts that are Findable,Accessible,Interoperable and Reusable by machines and by *** by now widely accepted,the FAIR Principles by design do not explicitly consider actual implementation choices enabling FAIR *** different communities have their own,often well-established implementation preferences and priorities for data reuse,coordinating a broadly accepted,widely used FAIR implementation approach remains a global *** an effort to accelerate broad community convergence on FAIR implementation options,the GO FAIR community has launched the development of the FAIR Convergence *** Matrix is a platform that compiles for any community of practice,an inventory of their self-declared FAIR implementation choices and *** Convergence Matrix is itself a FAIR resource,openly available,and encourages voluntary participation by any self-identified community of practice(not only the GO FAIR Implementation Networks).Based on patterns of use and reuse of existing resources,the Convergence Matrix supports the transparent derivation of strategies that optimally coordinate convergence on standards and technologies in the emerging Internet of FAIR Data and Services.

关键词： FAIR Implementation Choices and Challenges Convergence FAIR Communities

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Influence of B source materials on the synthesis of tib_2-Al_2O_3 nanocomposite powders by mechanical alloying

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International Journal of Minerals,Metallurgy and Materials 2013年第12期20卷 1214-1220页

作者： Majid Abdellahi Javad Heidari Rahman Sabouhi Materials Engineering department Islamic Azad University

An Al2O3-tib2 nanocomposite was successfully synthesized by ball milling of Al, TiO2 and two B source materials of B2O3 （system （1）） and H3BO3 （system （2））. Phase identification of the milled samples was examined by Xray diffraction. The morphology and microstructure of the milled powders were monitored by scanning electron microscopy and transmission electron microscopy. It was found that the formation of this composite was completed after 15 and 30 h of milling time in systems （1） and （2）, respectively. More milling energy was required for the formation of this composite in system （2） due to the lubricant properties of HaBO3 and also its decomposition to HBO2 and B2O3 during milling. On the basis of X-ray diffraction patterns and thermodynamic calculations, this composite was formed by highly exothermic mechanically induced self-sustaining reactions （MSR） in both systems. The MSR mode took place around 9 h and 25 h of milling in systems （1） and （2）, respectively. At the end of milling （15 h for system （1） and 30 h for system （2）） the grain size of about 35-50 nm was obtained in both systems.

关键词： nanocomposites powders alumina titanium diboride mechanical alloying

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Formation of composites fabricated by exothermic dispersion reaction in Al-TiO_2-B_2O_3 system

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中国有色金属学会会刊：英文版 2007年第3期17卷 590-594页

作者：朱和国王恒志葛良琦陈湜吴申庆 department of Materials Science and Engineering Nanjing University of Science and Technology department of Materials Science and Engineeri ng Southeast University

The formation of aluminum matrix composites fabricated by exothermic dispersion reaction in Al-TiO2-B2O3 system was investigated. The thermal analysis results show that the reactions are spontaneous and exothermic. The Gibbs free energy of α-Al2O3 is the lowest among all the combustion products, followed by tib2 and Al3Ti. It is noted that when the B2O3/TiO2 mole ratio is below 1, the reaction products are composed of particle-like α-Al2O3, tib2 and rod-like Al3Ti. The α-Al2O3 crystallites, resulting from the reaction between Al and TiO2 or B2O3, are segregated at the grain boundaries due to a lower wettability with the matrix. SEM micrographs show that rod-like Al3Ti phase distributes uniformly in the matrix. When the B2O3/TiO2 mole ratio is around 1, the Al3Ti phase almost disappears in the composites, and the distribution of α-Al2O3 particulates is improved evidently.

关键词：复合材料分子比率发热弥散性能铝钛复合物

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Geo-environmental parametric 3D models of SARS-CoV-2 virus circulation in hospital ventilation systems

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Geoscience Frontiers 2022年第6期13卷 244-256页

作者： Carla Gabriela Carlot Zorzi Alcindo Neckel Laércio Stolfo Maculan Grace tibério Cardoso Leila Dal Moro Alexandre Almeida Del Savio Leopoldo D.Z.Carrasco Marcos L.S.Oliveira Eliane Thaines Bodah Brian William Bodah Faculdade Meridional IMED304-Passo Fundo-RS 99070-220Brazil Universidad de Lima Avenida Javier Prado Este 4600–Santiago de Surco 1503Peru department of Civil and Environmental.Universidad de la Costa CUCCalle 58#55–66BarranquillaAtlánticoColombia State University of New York Onondaga Community College4585 West Seneca TurnpikeSyracuseNY 13215USA Thaines and Bodah Center for Education and Development 840 South Meadowlark LaneOthelloWA 99344USA

The novel coronavirus, SARS-CoV-2, has the potential to cause natural ventilation systems in hospital environments to be rendered inadequate, not only for workers but also for people who transit through these environments even for a limited duration. Studies in of the fields of geosciences and engineering,when combined with appropriate technologies, allow for the possibility of reducing the impacts of the SARS-CoV-2 virus in the environment, including those of hospitals which are critical centers for healthcare. In this work, we build parametric 3D models to assess the possible circulation of the SARS-CoV-2 virus in the natural ventilation system of a hospital built to care infected patients during the COVID-19 pandemic. Building Information Modeling(BIM) was performed, generating 3D models of hospital environments utilizing Revit software for Autodesk CFD 2021. The evaluation considered dimensional analyses of 0°, 45°, 90° and 180°. The analysis of natural ventilation patterns on both internal and external surfaces and the distribution of windows in relation to the displacement dynamics of the SARS-CoV-2 virus through the air were considered. The results showed that in the external area of the hospital, the wind speed reached velocities up to 2.1 m/s when entering the building through open windows. In contact with the furniture, this value decreased to 0.78 m/s. In some internal isolation wards that house patients with COVID-19, areas that should be equipped with negative room pressure, air velocity was null. Our study provides insights into the possibility of SARS-CoV-2 contamination in internal hospital environments as well as external areas surrounding hospitals, both of which encounter high pedestrian traffic in cities worldwide.

关键词： COVID-19 global epidemic Dimensional analysis Wind velocity Hospital environment Contamination

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Comparative study on high temperature deformation behavior and processing maps of Mg-4Zn-1RE-0.5Zr alloy with and without in-situ sub-micron sized tib2 reinforcement

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Journal of Magnesium and Alloys 2022年第12期10卷 3520-3541页

作者： S.K.Sahoo S.K.Panigrahi department of Mechanical Engineering Indian Institute of Technology MadrasChennai-600036India Applied Magnesium Research Group Center of Excellence in Materials and Manufacturing for Futuristic Mobility Indian Institute of Technology MadrasChennai-600036India

Mg-4Zn-1RE-0.5Zr (ZE41) Mg alloy is extensively used in the aerospace and automobile *** order to improve the applicability and performance,this alloy was engineered with in-situ Ti B2reinforcement to form Ti B2/ZE41 *** high temperature deformation behavior and manufacturability of the newly developed Ti B2/ZE41 composite and the parent ZE41 Mg alloy were studied via establishing constitutive modeling of flow stress,deformation activation energy and processing map over a temperature range of 250℃-450℃ and strain rate range of 0.001 s-1-10 *** predicted flow stress behavior of both materials were found to be well consistent with the experimental values.A significant improvement in activation energy was found in Ti B2/ZE41 composite (171.54 k J/mol) as compared to the ZE41 alloy (148.15 k J/mol) due to the dispersed strengthening of in-situ Ti *** processing maps were developed via dynamic material modeling.A wider workability domain and higher peak efficiency (45%) were observed in Ti B2/ZE41 composite as compared to ZE41 alloy (41%).The Dynamic recrystallization is found to be the dominating deformation mechanism for both materials;however,particle stimulated nucleation was found to be an additional mode of deformation in Ti B2/ZE41 *** twinning and stress induced cracks were observed in both the materials at low temperature and high strain rate.A narrow range of instability zone is found in the present Ti B2/ZE41 composite among the existing published literature on Mg based *** detailed microstructural characterization was carried out in both workability and instability domains to establish the governing deformation mechanisms.

关键词： ZE41 Mg composite In-situ tib2 particles ZE41 Mg alloy Constitutive equations Processing map Dynamic recrystallization

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Microstructure and Sliding Wear Behaviour of Ni(Cr)-tib_2 Coatings Deposited by HVOF Spraying of SHS Powders

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材料热处理学报 2004年第5B期25卷 1183-1186页

作者： Behnam Lotfi Zohreh Sadeghian Faculty of Engineering Department of Materials Engineering Shahrecord University Shahrecord IranDepartment of Materials Science and Engineering Isfahan University of Technology Isfahan Iran

This work reports research concerning the microstructure and sliding wear behaviour of cermet coatings deposited by high velocity oxy-fuel (HVOF) spraying. Two cermets were prepared with the following target compositions namely, Ni (Cr)-65 wt.% tib2 and Ni (Cr)-40 wt.% tib2. Coating microstructures were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD), whilst microhardness and sliding wear tests were performed on the coatings to evaluate their performance. The HVOF sprayed deposits had layered, splat-like morphologies typical of thermally sprayed cermets. Coatings consisted primarily of tib2 particles in a nickel-based binder phase. Other minor peaks in the XRD patterns belong to tib, Ni2B, NiTiO3 and Ti2Oj. The coatings exhibit an amorphous halo in the diffraction pattern between 2 values of 40° and 50°. Sliding wear behaviour was examined using a conventional ball-on-disc apparatus. A sintered ceramic ball (A12O3) was employed as the counterface. The Ni (Cr)-65 wt.% tib2 coating had a lower wear rate than Ni (Cr)-40 wt.% tib2 coating. This may be related to the larger sizes of borides. Wear scar morphologies, on both coatings were examined by using SEM and EDAX detecting in order to establish the wear mechanism. Wear is proposed to proceed by subsurface cracking in these coatings.

关键词：显微结构滑动磨损 SHS HVOF Ni(Cr)-tib2合金

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Self-Propagating High-Temperature Reductive Synthesis of tib_2-Al_2O_3 Composite Powders

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Journal of Wuhan University of Technology(Materials Science) 2007年第1期22卷 48-51页

作者：于志强 department of Materials Science Fudan University

tib2-Al2O3 composite powders were produced by self-propagating high-temperature synthesis（SHS） method with reductive process from B2O3-TiO2-AI system. X-ray diffraction（XRD） and scanning electron microscopy（SEM） analyses show the presence of tib2 and Al2O3 only in the composite powders produced by SHS. The powders are uniform and free-agglomerate. Transmission electron microscopy （TEM） and high resolution electron microscopy （HREM） observation of microstructure of the composite powders indicate that the interfaces of the tib2-Al2O3 bond well, without any interfacial reaction products. It is proposed that the good interfacial bonding of the composite powders can be resulted from the tib2 particles crystallizing and growing on the Al2O3 particles surface with surface defects acting as nucleation centers.

关键词： SHS with reductive process tib2-Al2O3 composite powders B2O3+TiO2+Al system microstructure

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Pressure-induced novel structure with graphene-like boron-layer in titanium monoboride

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Chinese Physics B 2022年第11期31卷 416-423页

作者：金园园张金权凌山王妍琪李松匡芳光武志燕张传钊 department of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China School of Physics and Electronic Information Gannan Normal UniversityGanzhou 341000China College of Electronic and Electrical Engineering Henan Normal UniversityXinxiang 453007China

The recent discovery of the novel boron-framework in boron-rich metal borides with complex structures and intriguing features under high pressure has stimulated the search into the unique boron-network in the metal monoborides or boron-deficient metal borides at high ***,based on the particle swarm optimization algorithm combined with first-principles calculations,we thoroughly explored the structural evolution and properties of tib up to 200 *** material undergoes a pressure-induced phase transition of Pnma→Cmcm→*** of two known phases Pnma and Cmcm,an unexpected orthorhombic Pmmm structure was predicted to be energetically favored in the pressure range of 110.88–200 ***,the B covalent network eventually evolved from a one-dimensional zigzag chain in Pnma-tib and Cmcm-tib to a graphene-like B-sheet in *** the basis of the microscopic hardness model,the calculated hardness(H_(v))values of Pnma at 1 atm,Cmcm at 100 GPa,and Pmmm at 140 GPa are 36.81 GPa,25.17 GPa,and15.36 GPa,***,analyses of the density of states,electron localization function and the crystal orbital Hamilton population(COHP)exhibit that the bonding nature in the three tib structures can be considered as a combination of the B–B and Ti–B covalent ***,the high hardness and excellent mechanical properties of the three Ti B polymorphs can be ascribed to the strong B–B and Ti–B covalent bonds.

关键词： transition-metal boride high pressure first-principles phase transition

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Nursing Care in Patient with Advanced Cancer: The Experience of the Adult Oncology Unit of Lomé

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Journal of Cancer Therapy 2023年第7期14卷 307-316页

作者： Ablavi Adani-Ifè Mathias Ayivi Gisèle Agbanouvi Kouéssan Edoh tibéname Kombaté Mohaman Djibril department of Oncology University Teaching Hospital of Lomé Lomé Togo department of Internal Medicine University Teaching Hospital of Lomé Lomé Togo

Background: Cancer patients suffer physical, psychological, spiritual, and social pains, especially in the advanced stage. Nurses spend more time with patients than any other healthcare team member. This study aimed to assess nurses’ behavior and care experiences in patients with advanced cancer and explore patients’ perceptions of nursing care. Methods: A cross-sectional study was conducted with eight nurses and thirty patients with advanced cancer hospitalized in the oncology unit at Sylvanus Olympio Teaching Hospital of Lomé from July to August 2020. Results: The mean age of nurses was 34.3 years ranging from 23 to 48 years. There were five men (62.5%) and three women (37.5%). The mean duration of working in oncology nursing of all was less than two years. Only one nurse has training in palliative care. Stress (100%), sadness (100%), and fear (50%) were the most frequently expressed feeling of nurses. The frequently expressed difficulties were the lack of training in palliative care (87.5%), insufficiency of nursing staff (75%), and helplessness in front of the patient’s distress (75%). Among the thirty patients, were 22 women (72.7%) and 8 men (27.3%). The needs expressed by the patients were psychological support (n = 11;36.7%), pain relief (n = 10;33.3%), and moral support (n = 9;30%). Most of the patients (73.3%) affirmed that nurses did not inform them well about their disease. Three (10%) were very satisfied with the care provided, 23 patients (76.7%) were satisfied and 4 (13.3%) were unsatisfied. Conclusion: This study revealed that nursing care in Togolese patients with cancer faces many difficulties and there is a need for providing specialized oncology nursing.

关键词： Nursing Care Cancer Patient Oncology Togo

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Refining Effect of a New Al3Ti1B1RE Master Alloy on Al Sheets Used for Can Manufacture and Behavior of Rare Earths in Master Alloy

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Journal of Rare Earths 2003年第5期21卷 571-576页

作者：傅高升陈文哲钱匡武 department of Mechanical Engineering College of Materials Science and Engineering Fuzhou University

The refining effect of Al3Ti1B1RE master alloy on Al sheets used for pressure can manufacture and the behavior of mixed rare earths in master alloy were investigated with XRD, OM, SEM and EDAX. It is found that the refining effect of the refiner on the material has superiority over foreign or domestic Al5Ti1B refiner, and the refiner still retains its refining ability for 6 h after adding it to molten Al, thus improving the strength and plasticity of the material remarkably. The excellent refining effect and stability of AltibRE refiner result from that RE can lower the surface energy of molten Al and improve the wetting characteristics of molten Al on refinement nuclei such as TiAl 3, tib 2, etc., thus giving full play to the effect of heterogeneous nucleation and impeding the congregating tendency of tib 2 phase in molten Al. At the same time, RE gathering in front of solid/liquid interface are also easy to cause composition supercooling in molten Al, thus impeding the growth of α Al grains and promoting α Al nucleation on refinement nuclei. In addition, RE also play certain role in purification and grain refinement, or modification, especially their effect of purification can improve the metallurgical quality of AltibRE master alloy.

关键词： matel materials Al sheets used for can manufacture grain refinement Al3Ti1B1RE master alloy refining mechanism rare earths

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