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  • 1
    Language: English
    In: Earthquake engineering & structural dynamics, 2016-06, Vol.45 (7), p.1041-1061
    Description: Summary An effective way to study the complex seismic soil‐structure interaction phenomena is to investigate the response of physical scaled models in 1‐g or n‐g laboratory devices. The outcomes of an extensive experimental campaign carried out on scaled models by means of the shaking table of the Bristol Laboratory for Advanced Dynamics Engineering, University of Bristol, UK, are discussed in the present paper. The experimental model comprises an oscillator connected to a single or a group of piles embedded in a bi‐layer deposit. Different pile head conditions, that is free head and fixed head, several dynamic properties of the structure, including different masses at the top of the single degree of freedom system, excited by various input motions, e.g. white noise, sinedwells and natural earthquake strong motions recorded in Italy, have been tested. In the present work, the modal dynamic response of the soil–pile–structure system is assessed in terms of period elongation and system damping ratio. Furthermore, the effects of oscillator mass and pile head conditions on soil–pile response have been highlighted, when the harmonic input motions are considered. Copyright © 2015 John Wiley & Sons, Ltd.
    Subject(s): shaking table tests ; kinematic effects ; period elongation ; soil–structure interaction ; inertial effects ; damping ratio ; Advertising campaigns
    ISSN: 0098-8847
    E-ISSN: 1096-9845
    Source: Alma/SFX Local Collection
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  • 2
    Language: English
    In: IEEE transactions on applied superconductivity, 2019-08, Vol.29 (5), p.1-4
    Description: In the framework of the EuroCirCol project, the development of a conceptual design of the future circular collider main dipole is performed. The status of the block-coil option under investigation at CEA Saclay is presented. First, a two-dimensional (2-D) electromagnetic analysis is performed in a double aperture configuration with an interbeam separation of 250 mm. This is completed by a 3-D magnetic optimization, taking into consideration the analysis of the peak field value and position, as well as the coil ends integrated field quality. The main objective of the 3-D optimization is to keep coil ends as short as possible. The field quality optimization satisfies all requirements and leads to a peak field lower in the ends compared to the straight section. Finally, a 2-D mechanical study relying on a shell-based structure using bladders and keys is carried out. All main loading steps of the coils are taken into account.
    Subject(s): Two dimensional displays ; FCC ; Superconducting magnets ; HE-LHC ; Iron ; block coil ; Stress ; 16 T ; Three-dimensional displays ; Nb〈inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"〉 〈tex-math notation="LaTeX"〉 _{3}〈/tex-math〉 〈/inline-formula〉Sn ; Magnetic separation ; superconducting dipole ; Apertures
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 3
    Language: English
    In: Earthquake spectra, 2018-11, Vol.34 (4), p.1547-1555
    Description: The Central Italy earthquake sequence nominally began on 24 August 2016 with a M6.1 event on a normal fault that produced devastating effects in the town of Amatrice and several nearby villages and hamlets. A major international response was undertaken to record the effects of this disaster, including surface faulting, ground motions, landslides, and damage patterns to structures. This work targeted the development of high-value case histories useful to future research. Subsequent events in October 2016 exacerbated the damage in previously affected areas and caused damage to new areas in the north, particularly the relatively large town of Norcia. Additional reconnaissance after a M6.5 event on 30 October 2016 documented and mapped several large landslide features and increased damage states for structures in villages and hamlets throughout the region. This paper provides an overview of the reconnaissance activities undertaken to document and map these and other effects, and highlights valuable lessons learned regarding faulting and ground motions, engineering effects, and emergency response to this disaster.
    Subject(s): geologic hazards ; mass movements ; Norcia earthquake 2016 ; Europe ; Amatrice earthquake 2016 ; central Italy ; natural hazards ; earthquakes ; faults ; central Italy earthquakes 2016 ; Seismology ; landslides ; Italy ; Southern Europe
    ISSN: 8755-2930
    E-ISSN: 1944-8201
    Source: EBSCOhost EJS
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  • 4
    Language: English
    In: Journal of Clinical Microbiology, 2009-12-01, Vol.47 (12), p.3895-3901
    Description: Article Usage Stats Services JCM Citing Articles Google Scholar PubMed Related Content Social Bookmarking CiteULike Delicious Digg Facebook Google+ Mendeley Reddit StumbleUpon Twitter current issue JCM About JCM Subscribers Authors Reviewers Advertisers Inquiries from the Press Permissions & Commercial Reprints ASM Journals Public Access Policy JCM RSS Feeds 1752 N Street N.W. • Washington DC 20036 202.737.3600 • 202.942.9355 fax • journals@asmusa.org Print ISSN: 0095-1137 Online ISSN: 1098-660X Copyright © 2014 by the American Society for Microbiology.   For an alternate route to JCM .asm.org, visit: JCM       
    Subject(s): Fundamental and applied biological sciences. Psychology ; Biological and medical sciences ; Miscellaneous ; Microbiology ; Virology ; Predictive Value of Tests ; Carcinoma, Squamous Cell - virology ; Humans ; Middle Aged ; RNA, Messenger - analysis ; DNA, Viral - analysis ; Papillomavirus Infections - diagnosis ; Papillomavirus E7 Proteins - genetics ; Polymerase Chain Reaction - methods ; Carcinoma, Squamous Cell - diagnosis ; Young Adult ; RNA, Viral - genetics ; Sensitivity and Specificity ; Adult ; Female ; Oncogene Proteins, Viral - genetics ; Papillomavirus Infections - virology ; Oncogene Proteins, Viral - metabolism ; Uterine Cervical Neoplasms - diagnosis ; RNA, Messenger - genetics ; Cervical Intraepithelial Neoplasia - diagnosis ; RNA, Viral - analysis ; Cervix Uteri ; Cervical Intraepithelial Neoplasia - virology ; Papillomavirus E7 Proteins - metabolism ; Uterine Cervical Neoplasms - virology ; Aged ; DNA, Viral - genetics ; Index Medicus
    ISSN: 0095-1137
    E-ISSN: 1098-660X
    Source: HighWire Press (Free Journals)
    Source: Hellenic Academic Libraries Link
    Source: PubMed Central
    Source: © ProQuest LLC All rights reserved〈img src="https://exlibris-pub.s3.amazonaws.com/PQ_Logo.jpg" style="vertical-align:middle;margin-left:7px"〉
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  • 5
    Language: English
    In: IEEE transactions on applied superconductivity, 2019-08, Vol.29 (5), p.1-6
    Description: The Nb3Sn block coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, in the continuity of the European project EuCARD and EuCARD2. With an aperture of 100 mm and a target bore field of 13 T at 10.6 kA, the magnet is required for a new FRESCA2 cable test facility at CERN. In 2017, the magnet was pre-loaded to retain the forces while the magnet was powered to achieve 13.3 T in the magnet bore. Results of these tests were published. In 2018, the loading of the magnet has been increased for powering to higher current. In this paper, the updated results of the cold powering tests are discussed in terms of training, memory, and stable operation. The loading of the magnet and the mechanical measurements during cooldown are shown and compared to the earlier loading steps. The protection of the magnet is further reviewed and measured results are compared to the model simulations.
    Subject(s): Training ; Vibrations ; Antenna measurements ; Magnetic flux ; hotspot temperature ; Magnetomechanical effects ; high field Nb3Sn magnet ; Superconducting magnets ; cold powering tests ; Stress ; FRESCA2
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 6
    Language: English
    In: IEEE transactions on applied superconductivity, 2016-06, Vol.26 (4), p.1-5
    Description: In Nb 3 Sn accelerator magnets, non-superconducting precursor cables are wound into their final coil shape and then heat treated at a high temperature to form the A15 superconducting phase. The growth of cable strands during reaction and the differential thermal dilatation in the coil components lead to both stress in the cable and geometrical deformations of the winding, with possible consequences on magnet performances. An experimental campaign on different types of Rutherford cables has been carried out at CEA Saclay, in collaboration with CERN, in order to measure cable dimension changes in all directions, with respect to cable configuration and winding geometry. A 700-mm-long versatile test bench has been designed for several cable topologies up to 22 mm in width. This paper describes the tooling and presents the results of the experimental campaign led on the cables, made of powder-in-tube and restacked-rod-process strands, of FRESCA2, a 13-T dipole magnet.
    Subject(s): Superconducting cables ; Heat treatment ; Nb3Sn ; Rutherford cable ; Windings ; Niobium-tin ; winding contraction ; Cable insulation ; Conductors ; Thickness measurement
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 7
    Language: English
    In: Physical review. Accelerators and beams, 2017-03, Vol.20 (3), p.032401
    Description: The EuroCirCol collaboration is designing a 16 T Nb_{3}Sn dipole that can be used as the main bending magnet in a 100 km long 100 TeV hadron-hadron collider. For economic reasons, the magnets need to be as compact as possible, requiring optimization of the cable cross section in different magnetic field regions. This leads to very high stored energy density and poses serious challenges for the magnet protection in case of a quench, i.e., sudden loss of superconductivity in the winding. The magnet design therefore must account for the limitations set by quench protection from the earliest stages of the design. In this paper we describe how the aspect of quench protection has been accounted for in the process of developing different options for the 16 T dipole designs. We discuss the assumed safe values for hot spot temperatures and voltages, and the efficiency of the protection system. We describe the developed tools for the quench analysis, and how their usage in the magnet design will eventually ensure a secure magnet operation.
    ISSN: 2469-9888
    E-ISSN: 2469-9888
    Source: Directory of Open Access Journals
    Source: Hellenic Academic Libraries Link
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  • 8
    Language: English
    In: IEEE transactions on applied superconductivity, 2019-08, Vol.29 (5), p.1-7
    Description: In the framework of the Future Circular Collider (FCC) program, and in collaboration with CERN, CEA is developing a 1.5-m-long single aperture Nb 3 Sn block dipole. The so-called FCC Flared-end Dipole Demonstrator (F2D2) will produce at least 15 T with 14% margin at 1.9 K and will be assembled in a shell-based support structure. Its magnetic design is derived from the block-coil option proposed in the EuroCirCol studies and relying on graded cables for improved efficiency. The design uses identical strand dimensions but a lower critical current density according to the performance of a currently available conductor. The main challenge of this magnet lies in the concepts of joints between the conductor grades, which will be implemented for the first time in a Nb 3 Sn block dipole. After presenting the overall design of the magnet from a magnetic and mechanical standpoint, chosen fabrication techniques are detailed.
    Subject(s): Nb〈inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"〉 〈tex-math notation="LaTeX"〉 _{3}〈/tex-math〉 〈/inline-formula〉Sn ; Hafnium ; FCC ; Niobium-tin ; Superconducting magnets ; Apertures ; Conductors ; Cable insulation ; Block dipole ; superconducting accelerator magnet
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 9
    Language: English
    In: IEEE transactions on applied superconductivity, 2018-04, Vol.28 (3), p.1-5
    Description: In the framework of the EuroCirCol project, the development of a conceptual design of the Future Circular Collider main dipole is performed. Here is described the status of the study focusing on the block coil layout. An electromagnetic investigation carried out in a double aperture configuration is reported. This study is followed by a preliminary investigation of the magnet performance in three-dimensional (3-D) taking into consideration the integrated field quality as well as the peak field in the coil ends. Finally, a 2-D mechanical analysis of the bladder and key structure is detailed. This study clearly shows that the design reaches the limit of the material properties.
    Subject(s): Superconducting cables ; Nb3Sn ; Magnetomechanical effects ; Niobium-tin ; Hafnium ; FCC ; Superconducting magnets ; Apertures ; Iron ; Superconducting dipole ; 16 T
    ISSN: 1051-8223
    E-ISSN: 1558-2515
    Source: IEEE Electronic Library (IEL)
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  • 10
    Language: English
    In: Geotechnical and geological engineering, 2020-10, Vol.38 (5), p.5681-5691
    ISSN: 0960-3182
    E-ISSN: 1573-1529
    Source: Alma/SFX Local Collection
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