Bibliografías temáticas / Bonner Sphere

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Literatura académica sobre el tema "Bonner Sphere"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 6 de febrero de 2022

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Artículos de revistas sobre el tema "Bonner Sphere"

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Thomas, D. J. y A. V. Alevra. "Bonner sphere spectrometers—a critical review". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 476, n.º 1-2 (enero de 2002): 12–20. http://dx.doi.org/10.1016/s0168-9002(01)01379-1.

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Ogata, T., S. Kudo, Y. Watanabe, T. Muramatsu, H. Yamamoto, S. Iwai, S. Takagi, H. Harano, T. Matsumoto y J. Nishiyama. "The calibration of Bonner sphere spectrometer". Radiation Protection Dosimetry 146, n.º 1-3 (24 de mayo de 2011): 107–10. http://dx.doi.org/10.1093/rpd/ncr123.

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Stringer, Jimmy Steele, Henry Spitz y Samuel Glover. "MEASUREMENT AND ANALYSIS OF THE NEUTRON ENERGY SPECTRUM AND ASSOCIATED OCCUPATIONAL EXPOSURE FROM A SHIELDED241AM-BE SOURCE". Radiation Protection Dosimetry 190, n.º 2 (junio de 2020): 125–31. http://dx.doi.org/10.1093/rpd/ncaa085.

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Abstract A set of five Bonner spheres was used to measure the ambient neutron H*(10) dose around an orphan 241Am-Be neutron source shielded with different arrangements and types of neutron-absorbing materials. These results were compared to measurements obtained using a portable radiation dosemeter. The Bonner sphere measurement results identified the presence of a large thermal and intermediate neutron component from the shielded 241Am-Be source that was not revealed using the portable instrument.
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Vylet, V. "Response matrix of an extended Bonner sphere system". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 476, n.º 1-2 (enero de 2002): 26–30. http://dx.doi.org/10.1016/s0168-9002(01)01383-3.

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Rimpler, Arndt. "Bonner sphere neutron spectrometry at spent fuel casks". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 476, n.º 1-2 (enero de 2002): 468–73. http://dx.doi.org/10.1016/s0168-9002(01)01492-9.

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Birattari, C., E. Dimovasili, A. Mitaroff y M. Silari. "A Bonner Sphere Spectrometer with extended response matrix". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 620, n.º 2-3 (agosto de 2010): 260–69. http://dx.doi.org/10.1016/j.nima.2010.04.033.

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Decker, Andrew W., Stephen R. McHale, Michael P. Shannon, Justin A. Clinton y John W. McClory. "Novel Bonner Sphere Spectrometer Response Functions Using MCNP6". IEEE Transactions on Nuclear Science 62, n.º 4 (agosto de 2015): 1689–94. http://dx.doi.org/10.1109/tns.2015.2416652.

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Kralik, M., A. Aroua, M. Grecescu, V. Mares, T. Novotn , H. Schraube y B. Wiegel. "Specification of Bonner Sphere Systems for Neutron Spectrometry". Radiation Protection Dosimetry 70, n.º 1 (1 de abril de 1997): 279–84. http://dx.doi.org/10.1093/oxfordjournals.rpd.a031960.

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Marek, Milan y Ladislav Viererbl. "Bonner sphere spectrometer for characterization of BNCT beam". Applied Radiation and Isotopes 69, n.º 12 (diciembre de 2011): 1918–20. http://dx.doi.org/10.1016/j.apradiso.2011.04.006.

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Tursinah, Rasito, Bunawas Bunawas y Jungho Kim. "NEUTRON RESPONSE FUNCTION OF BONNER SPHERE SPECTROMETER WITH 6LiI(Eu) DETECTOR". GANENDRA Majalah IPTEK Nuklir 20, n.º 2 (15 de septiembre de 2017): 65. http://dx.doi.org/10.17146/gnd.2017.20.2.3319.

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Neutron Response Function of Bonner Sphere Spectrometer With 6LiI(Eu) Detector. The detector response function was needed to measure the neutron fluence based on the count rates from Bonner Sphere Spectrometer (BSS). The determination of response function of a BSS with 6LiI(Eu) detector has been performed using Monte Carlo MCNPX code. This calculation was performed for BSS using scintillation detector of 4 mm × 4 mm 6LiI(Eu) which is placed at the center of a set of polyethylene spheres i.e bare, 2", 3", 5", 8", 10", and 12" diameters. The BSS response functions were obtained for neutron energy of 1x10-9 MeV - 1x102 MeV in 111 energy bins and each value has an uncertainty less or equal to 2 %. The response function were compared with two response functions reported in the literature i.e IAEA document in Technical Reports Series 403 (TRS-403) and the calculation from Vega-Carrillo, et al. Also validated with measurement 252Cf neutron spectra, that shown the simulated BSS spectra were quite close to the experimental measured with a differrence of 3%.
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Tesis sobre el tema "Bonner Sphere"

1

Burgett, Eric A. "A broad spectrum neutron spectrometer utilizing a high energy Bonner sphere extension". Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22624.

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A novel broad spectrum neutron spectrometer has been created to extend the useful energy range of existing neutron Bonner Sphere Spectrometers (BSS). Both an active LiI(Eu) scintillator probe and passive gold foil detector were utilized to extend the energy response of the existing BSS. Above 20 MeV the energy structure for the standard polyethylene BSS are poor because the response functions are not unique. MCNPX was used to investigate several modifications to the BSS system which resulted in the Bonner Sphere Extension (BSE). This cost effective extension uses several concentric spheres of copper, lead, and tungsten heavy metal downscatter materials to extend the useful range of the current BSS from 20 MeV to above 1 GeV. Using both a 3" and 5" inner polyethylene spheres, aluminum shell sets were made with a 1" cavity and filled with the high Z materials for six total sets of spheres. a 12" and 8" polyethylene sphere were also milled to accept the heavy metal spheres. The system was validated at the Los Alamos Neutron Science Center (LANSCE) neutron beam. The system was calibrated at LANSCE for neutrons up to 800 MeV on target 4's 15 degree right flightpath (4FP15R) at 90 meters. Detailed models in MCNPX were made of the BSS, BSE and LANSCE facilities. Fine group responses were made and compared to the unfolded data from LANSCE. A vast improvement over the BSS system alone was seen with reasonable agreement with time of flight data measured at LANSCE and MCNPX calculated neutron spectra.
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BRAGA, CLAUDIA C. "Aplicacao da tecnica de redes neurais em espectrometria e dosimetria de neutrons, utilizando esferas de Bonner e folhas de ativacao". reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10911.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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3

Cheminet, Adrien. "Développement d'un système opérationnel de spectrométrie des neutrons dédié à la caractérisation dynamique de l'environnement radiatif naturel atmosphérique à l'Observatoire du Pic du Midi de Bigorre". Thesis, Toulouse, ISAE, 2013. http://www.theses.fr/2013ESAE0028.

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Ces travaux de thèse sont le fruit d’une collaboration entre le Laboratoire de Métrologie et Dosimétrie des Neutrons de l’Institut de Radioprotection et de Sûreté Nucléaire et le Département d’Environnement Spatial de l’Office National d’Etudes et Recherches Aérospatiales. L’objectif était de caractériser et de mettre en service un système opérationnel de spectrométrie des neutrons, étendu au domaine des hautes énergies afin de mesurer de manière dynamique les variations de l’environnement radiatif naturel atmosphérique en altitude au sommet de l’Observatoire du Pic du Midi de Bigorre dans les Pyrénées. Pour ce faire, les réponses des différents détecteurs ont été calculées par simulations Monte Carlo avant d’être validées expérimentalement jusqu’au domaine des hautes énergies en champs neutroniques de référence. La méthode de reconstruction mathématique du spectre par déconvolution a été étudiée afin de quantifier les incertitudes systématiques. Ensuite, le système a été testé sous la roche au Laboratoire Souterrain à Bas Bruit de Rustrel avant d’effectuer les premières mesures en altitude à +500 m et +1000 m. A la suite de ces expériences, le spectromètre a été installé en mai 2011 au sommet du Pic du Midi à +2885 m. La méthodologie d’analyse en continu des données recueillies a été développée. Des oscillations saisonnières du spectre dont l’amplitude dépend du domaine énergétique ont été mises en évidence. Des décroissances Forbush,caractéristiques d’éruptions solaires, ont également été observées à l’approche du 24ème cycle solaire.Des simulations Monte Carlo ont permis d’analyser ces résultats. Les données ont été valorisées grâce à des applications en dosimétrie personnelle et en fiabilité des composants électroniques vis-à-vis des radiations
This PhD Thesis has been achieved thanks to the joint effort between two French organizations, the French Institute for Radiological Protection and Nuclear Safety (IRSN/LMDN, Cadarache) and the French Aerospace Lab (ONERA/ DESP, Toulouse). The aim was to develop an operational neutron spectrometer extended to high energies in order to measure the dynamics of the spectral variations of the natural radiative environment at the summit of the Pic du Midi Observatory in the French Pyrenees. Thereby, the fluence responses of each detector were calculated thanks to Monte Carlo simulations. Afterwards, they were validated by means of experimental campaigns up to high energies (>20 MeV) nearby reference neutron fields. The systematic uncertainties were deduced after detailed studies of the mathematic reconstruction of the spectra (i.e. unfolding procedure). Then, the system was tested under rocks at the LSBB of Rustrel before being installed at respectively+500 m and +1000 m above sea level for the first environmental campaigns. Finally, the spectrometer has been operating for two years after its deployment at the summit of the Pic du Midi (+2885 m). The continuous data were analysed thanks to an innovative method. Some seasonal and spectral variations were observed. Some Forbush decreases were also recorded after strong solar flares. These data were further analysed thanks to Monte Carlo simulations. The data were made more attractive thanks toseveral practical applications with personal dosimetry or reliability of submicron electronics components
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Chung, Jae Hoon. "Compressive mechanical behavior of hollow ceramic spheres and bonded-sphere forms". Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/9984.

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Ford, Theodore Robert. "Thermal conductivity of bonded hollow-sphere monoliths". Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/20045.

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Fung, Ka-yu y 馮家裕. "Study of ³He neutron spectrometer with bonner spheres and its application in low background environment". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/207193.

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A Bonner Sphere neutron spectrometer for low background environment was developed. The spectrometer consists of a 3He neutron detector, eight high density polyethylene spheres with size ranging from 5-inch to 12-inch and two Lead shells with thickness 1cm and 2 cm, which is used to increase the detect efficiency at high energy range. The dead time of the spectrometer is about 3.7 microseconds, which is mainly contributed by the extended TTL signal from the DAQ. The background of 3He detector is measured in CJPL which is the deepest underground laboratory in the world. The detector background is 15.50 × 10-4 ± 8.1 × 10-5 counts per second. The responses of Bonner Spheres were obtained by Geant4 Monte Carlo simulation. The responses were verified by a 241AmBe neutron source in HKU. A genetic algorithm unfolding program(GA) was developed and tested by unfolding the 241AmBe neutron source. The background neutron in HKU Observatory was measured by the spectrometer and unfolded by GA s. The unfolded neutron flux is (56.84 ± 6.01) × 10-4 s-1 cm-1 by NSUGA version 3 and (56.43 ± 2.53) × 10-4 s-1 cm-1from NSUGA_FORTRAN. Another unfolding program "Equalizer" with different algorithm, by scaling a initial guess spectrum, was also used to unfold the background spectrum in HKU Observatory. The unfolded neutron flux from "Equalizer" is (51.69 ± 2.79) × 10-4 s-1 cm-1. The neutron flux from three unfolding programs agree with each other. The measurement was repeated in Daya Bay EH1 and the results were used to unfold the background neutron spectrum. The unfolded spectrum flux was (34.50 ± 3.13) × 10-5 s-1cm-1from NSUGA version 3, (35.13 ± 1.45) × 10-5 s-1cm-1 from NSUGA_FORTRAN. The unfolded neutron fluxes from GA s agree with each other. However the shape of spectra shows a chaotic pattern in low energy region. The unfolded neutron flux from "Equalizer" is (30.85 ± 1.95) × 10-5 s-1c m-1. The unfolding programs show a dominant thermal neutron peak, a tiny (α, n) peak and a small cosmic-ray neutron peak. The Bonner Spheres Spectrometer has flaws due to the geometry and the nature of unfolding process. Some ideas are suggested to minimize the effect from the error sources.
published_or_final_version
Physics
Master
Master of Philosophy
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Vylet, Vaclav Vaclav Vylet. "Détermination des champs de radiations neutroniques par la méthode des sphères de Bonner /". [S.l.] : [s.n.], 1987. http://library.epfl.ch/theses/?nr=671.

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Serre, Sébastien. "Définition par Modélisation, Optimisation et Caractérisation d'un Système de Spectrométrie de Neutron par Sphères de Bonner Etendu au Domaine des Hautes Energies". Phd thesis, Université Paul Cézanne - Aix-Marseille III, 2010. http://tel.archives-ouvertes.fr/tel-00630202.

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La caractérisation par mesure spectrale de l'environnement neutronique atmosphérique ambiant s'avère être spécifiquement primordiale dans le contexte de la problématique actuelle liée à l'évaluation des effets de radiations naturelles dans les matériaux semi-conducteurs. Ces " effets singuliers " identifiés sont susceptibles d'altérer le bon fonctionnement des technologies sur silicium fortement intégrées jusqu'au niveau du sol terrestre. Les travaux menés au cours de cette thèse de doctorat ont ainsi porté sur le développement d'un spectromètre de neutron, basé sur le principe du système généralisé des sphères de Bonner, de sensibilité adaptée à la mesure en environnement radiatif atmosphérique naturel et d'efficacité étendue de surcroît jusqu'au domaine des hautes énergies. Le développement du spectromètre s'est alors grandement appuyé sur la simulation numérique de type Monte Carlo au moyen du code de transport MCNPX. Une fois le système multi-détecteurs défini sur le support d'une modélisation détaillée, la matrice de réponse en fluence a été déterminée sur un large spectre en énergie, depuis les énergies thermiques jusqu'à plusieurs GeV. Une phase d'extension puis d'optimisation de la réponse aux neutrons d'énergies supérieures à la dizaine de MeV ont été menées pour aboutir à la configuration et au dimensionnement finals du système de spectrométrie, jusqu'à sa propre réalisation. Une phase de caractérisation, par simulations Monte Carlo, du spectromètre s'est ensuite consacrée à l'évaluation des possibles déviations et incertitudes associées aux réponses en fluence calculées. Une analyse de la sensibilité du spectromètre aux composantes radiatives atmosphériques chargées complète et finalise cette étude exhaustive de caractérisation. Des tests de mesures réalisés au moyen du spectromètre auprès d'une source 241Am-Be de référence ont apporté des éléments de validation expérimentale préliminaire de la matrice de réponse calculée.
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Serre, Sébastien. "Définition par modélisation, optimisation et caractérisation d’un système de spectrométrie de neutron par sphères de Bonner étendu au domaine des hautes énergies". Aix-Marseille 3, 2010. https://tel.archives-ouvertes.fr/tel-00630202.

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La caractérisation par mesure spectrale de l’environnement neutronique atmosphérique ambiant s’avère être spécifiquement primordiale dans le contexte de la problématique actuelle liée à l’évaluation des effets de radiations naturelles dans les matériaux semi-conducteurs. Ces « effets singuliers » identifiés sont susceptibles d’altérer le bon fonctionnement des technologies sur silicium fortement intégrées jusqu’au sol terrestre. Les travaux menés au cours de cette thèse de doctorat ont ainsi porté sur le développement d’un spectromètre de neutron, basé sur le principe du système généralisé des sphères de Bonner, de sensibilité adaptée à la mesure en environnement radiatif atmosphérique naturel et d’efficacité étendue de surcroît jusqu’au domaine des hautes énergies. Le développement du spectromètre s’est alors grandement appuyé sur la simulation numérique de type Monte Carlo au moyen du code de transport MCNPX. Une fois le système multi-détecteurs défini sur le support d’une modélisation détaillée, la matrice de réponse en fluence a été déterminée sur un large spectre en énergie, depuis les énergies thermiques jusqu’à plusieurs GeV. Une phase d’extension puis d’optimisation de la réponse aux neutrons d’énergies supérieures à la dizaine de MeV a été menée pour aboutir à la configuration et au dimensionnement finals du système de spectrométrie, jusqu’à sa propre réalisation. Une étude de caractérisation, par simulations Monte Carlo, du spectromètre s’est ensuite consacrée à l’évaluation des possibles déviations et incertitudes associées aux réponses en fluence calculées. Une étude de sensibilité du spectromètre aux composantes radiatives atmosphériques chargées complète cette étude de caractérisation. Des tests de mesures réalisés au moyen du spectromètre auprès d’une source 241AmBe de référence ont apportés des éléments de validation expérimentale préliminaire de la matrice de réponse calculée.
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Bedogni, Roberto. "Neutron spectrometry and dosimetry for radiation protection around a high energy electron / positron collider". Doctoral thesis, Universitat Autònoma de Barcelona, 2006. http://hdl.handle.net/10803/3380.

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El presente trabajo versa sobre la dosimetría neutrónica en radioprotección alrededor de los aceleradores de electrones de alta energía desde el punto de vista de la espectrometría neutrónica experimental.
Concretamente, se ha caracterizado y calibrado un Espectrómetro por Esferas Bonner (BBS) comercial basado en un centelleador cilíndrico de 6LiI(Eu), 4 mm x 4 mm. Al conjunto de esferas de polietileno original, con diámetros de 2" a 12", se le ha añadido una esfera de 12" con una capa interna de 1 cm plomo, para ampliar el rango de energías de la respuesta del espectrómetro hasta la región de los 102 MeV. Se ha establecido la matriz de respuestas en función de la energía del espectrómetro y se ha procedido a su validación experimental con irradiaciones en campos neutrónicos de referencia. Se ha desarrollado un innovador código de deconvolución, FRUIT (FRascati Unfolding InTeractive code), para la obtención de la distribución energética de los neutrones a partir de las medidas experimentales. El código ha sido testado y validado en campos neutrónicos conocidos.
El sistema completo ha sido aplicado en la medida de los espectros neutrónicos alrededor del colisionador electrón/positron DA?NE de 510 MeV, en los Laboratorios Nacionales de Frascati del INFN (Istituto Nazionale di Fisica Nucleare). La información dosimétrica obtenida a partir de los espectros medidos ha sido implementada en los protocolos para la vigilancia radiológica alrededor del acelerador. Además, el conocimiento detallado de la dosis equivalente ambiental neutrónica en puntos seleccionados de la instalación ha permitido la determinación de factores de calibración específicos para los monitores de área usados en rutina en D??NE.
This work addresses the topic of the neutron dosimetry for radiation protection around high-energy electron accelerators through the approach of the experimental neutron spectrometry.
A commercial Bonner Sphere Spectrometer (BSS) based on a 4 mm x 4 mm cylindrical 6LiI(Eu) scintillator was characterized and calibrated. The original set of polyethylene spheres, with diameter from 2" to 12", was augmented with a lead loaded 12" sphere, in order to extend the energy range of the spectrometer response up to the 102 MeV region. The energy response matrix of the spectrometer was established and experimentally validated with irradiations in reference neutron fields. An innovative unfolding code, FRUIT (FRascati Unfolding InTeractive code) has been written in order to infer the neutron energy distribution from the experimental readings. The code has been tested and validated in known neutron fields.
The whole system has been used to measure the neutron spectra around the 510 MeV electron/positron DA?NE collider, at the Frascati National Laboratories on the INFN (Istituto Nazionale di Fisica Nucleare). The dosimetric information taken from the measured spectra was implemented in the procedures for the radiological surveillance around the accelerator. Moreover, the accurate knowledge of the neutron ambient dose equivalent in selected points of the installation allowed determining workplace specific calibration factors for the survey-meters routinely used at DA?NE.
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Libros sobre el tema "Bonner Sphere"

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Bill, Bonney y Wilson Helen 1945-, eds. Australian communications and the public sphere: Essays in memory of Bill Bonney. South Melbourne: Macmillan Co. of Australia Pty., 1989.

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1944-, Bourin Monique, ed. Villes, bonnes villes, cités et capitales: Études d'histoire urbaine (XII-XVIII siècle) offertes à Bernard Chevalier. Caen: Paradigme, 1993.

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Capítulos de libros sobre el tema "Bonner Sphere"

1

Birattari, C., P. Cappellaro, A. Mitaroff y M. Silari. "Development of an Extended Range Bonner Sphere Spectrometer". En Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications, 1157–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-18211-2_185.

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Wilson, Helen. "Afterword: Bill Bonney and the Contributors". En Australian Communications and the Public Sphere, 277–86. London: Macmillan Education UK, 1989. http://dx.doi.org/10.1007/978-1-349-11077-3_15.

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Alevra, A. V., M. Matzke y B. R. L. Siebert. "Experiences from an International Unfolding Intercomparison with Bonner Spheres". En Proceedings of the Seventh ASTM-Euratom Symposium on Reactor Dosimetry, 215–22. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2781-3_24.

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Veyhl, Christoph, Rolf Winkler, Markus Merkel y Andreas Öchsner. "Structural Characterisation of Diffusion-Bonded Hollow Sphere Structures". En Defect and Diffusion Forum, 105–12. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-62-0.105.

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Veyhl, Christoph, Rolf Winkler, Markus Merkel y Andreas Öchsner. "Mechanical Testing of Diffusion Bonded Metallic Hollow Sphere Structure (MHSS)". En Defect and Diffusion Forum, 85–96. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-62-0.85.

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Fiedler, Thomas y Andreas Öchsner. "On the Thermal Conductivity of Adhesively Bonded and Sintered Hollow Sphere Structures (HSS)". En Materials Science Forum, 39–44. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-438-3.39.

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Fiedler, Thomas, Andreas Öchsner y José Grácio. "Uniaxial Elasto-Plastic Behaviour of Adhesively Bonded Hollow Sphere Structures (HHS): Numerical Simulations and Experiments". En THERMEC 2006, 1874–79. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.1874.

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Hernigou, P. y D. Goutallier. "Reconstruction in Avascular Necrosis of the Spheric Geometrical Shape of the Femoral Head with Acrylic Cement". En Bone Circulation and Bone Necrosis, 353–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-73644-5_73.

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Torchia, A. M., M. Teodoro, S. Fiorilli, B. Onida, F. Testa, E. Garrone y R. Aiello. "Direct synthesis of porous functionalised polysilsesqiuoxanes self-bonded spheres". En From Zeolites to Porous MOF Materials - The 40th Anniversary of International Zeolite Conference, Proceedings of the 15th International Zeolite Conference, 1944–49. Elsevier, 2007. http://dx.doi.org/10.1016/s0167-2991(07)81083-4.

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Lootens, Tricia. "Suspending Spheres, Suspending Disbelief: Hegel’s Antigone, Craik’s Crimea, Woolf’s Three Guineas". En The Political Poetess. Princeton University Press, 2016. http://dx.doi.org/10.23943/princeton/9780691170312.003.0004.

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This chapter examines the capacity of suspended spheres to help figure otherwise mysterious acts of political, intellectual, historical denial. Building on Bonnie Honig's critique of current democratic theory's willingness to accept what she terms the “Antigone effect,” it considers what histories of evasion might help explain current democratic theorists' apparent willingness to keep positioning Antigone as heroic figure for femininity's relations to the State, without ever asking about Antigone's slaves. The chapter analyzes two texts,G.W.F. Hegel's Phenomenology of Spirit and Virginia Woolf's Three Guineas, as well as Dinah Mulock Craik's Crimean War poems, to identify forms of analysis that might help expose and denaturalize the allure of suspending spheres, the satisfactions of continuing to pretend that race plays no role within the maintenance of even the most abstract “State-free zones.” Finally, it shows how sentimental poetry can be employed to articulate the workings of a spatialized trope of separate spheres.
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Actas de conferencias sobre el tema "Bonner Sphere"

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Dubeau, Jacques, S. Sanjeewa Hakmana Witharana, Jovica Atanackovic, Andre Yonkeu, Witold Matysiak, Anthony J. Waker, Aslam Ibrahim y John Paul Archambault. "A field portable neutron spectrometer based on the Bonner Sphere Principles". En 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (2012 NSS/MIC). IEEE, 2012. http://dx.doi.org/10.1109/nssmic.2012.6551075.

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Masuda, A., T. Matsumoto, H. Harano, J. Nishiyama, Y. Iwamoto, M. Hagiwara, D. Satoh et al. "Response measurement of a Bonner sphere spectrometer for high-energy neutrons". En 2010 IEEE Nuclear Science Symposium and Medical Imaging Conference (2010 NSS/MIC). IEEE, 2010. http://dx.doi.org/10.1109/nssmic.2010.5873911.

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Pavlovič, Márius y Peter Vlk. "Monitoring of PET cyclotron radiation fields using a novel Bonner sphere spectrometer". En 1ST INTERNATIONAL CONFERENCE ON RADIATIONS AND APPLICATIONS (ICRA-2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5048889.

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Zheng, Bowen, Chunyu Jiang, Zihao Liu y Zejie Yin. "Performance of the HL-2A Bonner sphere spectrometer in monoenergetic neutron fields from 100 keV to 1 MeV". En 2021 IEEE 5th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC). IEEE, 2021. http://dx.doi.org/10.1109/iaeac50856.2021.9390850.

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Sarchiapone, L. y D. Zafiropoulos. "Neutron spectrometry using LNL bonner spheres and FLUKA". En MULTIDISCIPLINARY APPLICATIONS OF NUCLEAR PHYSICS WITH ION BEAMS (ION BEAMS '12). AIP, 2013. http://dx.doi.org/10.1063/1.4812919.

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Alevra, Alexandru V. "Neutron spectrometry with Bonner spheres: applications in physics and dosimetry". En Fifth International Conference on Applications of Nuclear Techniques: Neutrons in Research and Industry, editado por George Vourvopoulos. SPIE, 1997. http://dx.doi.org/10.1117/12.267914.

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Ortiz-Rodríguez, J. M., A. Reyes Alfaro, A. Reyes Haro, L. O. Solís Sánches, R. Castañeda Miranda, J. M. Cervantes Viramontes y H. R. Vega-Carrillo. "NSDann2BS, a neutron spectrum unfolding code based on neural networks technology and two bonner spheres". En RADIATION PHYSICS: IX International Symposium on Radiation Physics. AIP, 2013. http://dx.doi.org/10.1063/1.4813469.

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Serre, S., K. Castellani-Coulie, D. Paul y V. Lacoste. "Optimization using Monte Carlo calculations of a Bonner spheres spectrometer extended to high energies for the neutron environments characterization". En 2008 European Conference on Radiation and Its Effects on Components and Systems (RADECS). IEEE, 2008. http://dx.doi.org/10.1109/radecs.2008.5782772.

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Franci, R. y V. Parenti-Castelli. "A 5-5 One-Degree-of-Freedom Fully Parallel Mechanism for the Modeling of Passive Motion at the Human Ankle Joint". En ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34841.

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This paper presents a new equivalent spatial mechanism for the passive motion simulation at the human ankle complex joint. The mechanism is based on the geometry of the main anatomical structures of the ankle complex, such as the shape of the talus and tibio/fibula bones at their interface, and the TiCal and CaFil ligament lengths. In particular, three sphere-to-sphere contact points at the interface have been identified and isometric fibers of both TiCal and CaFil ligaments have been considered to devise the equivalent mechanism. The proposed mechanism is a fully-parallel mechanism of type 5-5 with one degree of freedom. A procedure for the optimal synthesis of the mechanism is given. Simulation results compared with experimental data show the efficiency of the proposed mechanism to replicate the ankle passive motion, and also to reflect at the same time the main anatomical structures of the ankle joint. The new mechanism is believed to be a useful tool for both pre-operation planning and prosthesis design.
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Vidal-Lesso, Agustín, Carlos Lara-Velázquez, Javier Bayod-López, Ricardo Becerro de Bengoa Vallejo y Natali Mancera Campos. "Biomechanical Structural Effect of Pinball Region Contact Applied to a Finite Element Model of Human Foot". En ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11085.

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Abstract Developing a finite element model of the human foot to analyze the numerical effect of the contact between its bones can also help to understand the complex biomechanics of this member. Therefore, in this work, a three-dimensional model of finite elements of the foot is developed, in order to determine the contact radius between each pair of bones, which help to achieve an adequate distribution of body weight and be able to perform a correct characterization of the biomechanical effect of the foot. In the finite element model developed in this work, the cartilage was replaced by the pair of contact between two bodies (bones) and was simplified to the bony and ligamentous system. It was observed that the radius of the contact sphere of the pinball region has a great impact on the distribution of reactions with the ground (GRF) and the general behavior of the simulation. By varying the contact parameters, it was possible to reduce the error of the results obtained by the simulation with respect to those obtained experimentally up to a value of less than 5%; emphasizing the importance of checking the contact parameters before continuing with a simulation of finite elements.
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