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1تقرير
المؤلفون: Park, Jungeun, Rizzolo, Douglas
مصطلحات موضوعية: Mathematics - Probability, Mathematics - Combinatorics, 60C05, 60F05, 60J80
الوصف: We use local limits of Galton-Watson trees to establish local limit theorems for permutations conditioned to avoid a pattern of length three. In the case of 321-avoiding permutations our results resolve an open problem of Pinsky. In the other cases our results give new descriptions of the limiting objects in terms of size-biased Galton-Watson trees.
Comment: 11 pagesالوصول الحر: http://arxiv.org/abs/2401.01957Test
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2دورية أكاديمية
المصدر: Revista de Nutrição. June 2016 29(3)
مصطلحات موضوعية: Food consumption, Food planning, Food preferences
الوصف: Objective This study aimed to investigate aspects associated with food involvement and to ascertain whether individuals with higher food involvement consume larger amounts of fruits and vegetables. Methods This cross-sectional, analytical study was conducted with 301 adults (19-59 years old) from the Federal District, Brazil. Sample size calculation was based on numbers from the Brazilian Demographic Census and on consumption data for fruits and vegetables obtained from the Surveillance of Risk and Protective Factors for Chronic Diseases by Telephone Interviews survey. Data were collected in October of 2012. The questionnaire comprised 28 questions and included socio-demographic variables, reported fruit and vegetable consumption, and an adapted food involvement scale. Data were analyzed using Statistical Package for the Social Sciences software. Descriptive and comparative analyses were performed to determine population characteristics . Results Women and older individuals displayed a higher degree of food involvement than did men and younger individuals ( p <0.001). Among the factors included in food involvement, the highest influence was attributed to satisfaction in preparing food (cooking), pre-preparation of food, and pleasure in cooking for other people ( p <0.001). Conclusion The results presented here suggest that food involvement can be stimulated through innovative strategies of communication that go beyond the biological arguments and focus on the cultural expression of the elements of socialization, whose relationship with eating is well established.
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3تقرير
المؤلفون: Forman, Noah, Pal, Soumik, Rizzolo, Douglas, Winkel, Matthias
الوصف: Motivated by a down-up Markov chain on cladograms, David Aldous conjectured in 1999 that there exists a "diffusion on continuum trees" whose mass partitions at any finite number of branch points evolve as Wright-Fisher diffusions with some negative mutation rates, until some branch point disappears. Building on previous work on interval-partition-valued processes, we construct this conjectured process via a consistent system of stationary evolutions of binary trees with k labeled leaves and edges decorated with interval partitions. The interval partitions are scaled Poisson-Dirichlet interval partitions whose interval lengths record subtree masses. They also possess a diversity property that captures certain distances in the continuum tree. Continuously evolving diversities give access to continuously evolving continuum tree distances. The pathwise construction allows us to study this "Aldous diffusion" in the Gromov-Hausdorff-Prokhorov space of rooted, weighted R-trees. We establish the simple Markov property and path-continuity. The Aldous diffusion is stationary with the distribution of the Brownian continuum random tree. While the Brownian CRT is a.s. binary, we show that there is a dense null set of exceptional times when the Aldous diffusion has a ternary branch point, including stopping times at which the strong Markov property fails. Our construction relates to the two-parameter Chinese restaurant process, branching processes, and stable L\'evy processes, among other connections. Wright-Fisher diffusions and the aforementioned processes of Poisson-Dirichlet interval partitions arise as interesting projections of the Aldous diffusion. Finally, one can embed Aldous's stationary down-up Markov chain on cladograms in the Aldous diffusion and hence address a related conjecture by David Aldous by establishing a scaling limit theorem.
Comment: 193+vi pages, 26 figuresالوصول الحر: http://arxiv.org/abs/2305.17269Test
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4دورية أكاديمية
المؤلفون: Recine, Elisabetta, Sugai, Andrea, Monteiro, Renata Alves, Rizzolo, Anelise, Fagundes, Andhressa
المصدر: Revista de Nutrição. December 2014 27(6)
مصطلحات موضوعية: Educação superior, Prática profissional, Saúde Pública
الوصف: Objetivo: Este trabalho tem por objetivo analisar os conteúdos dos planos de ensino das disciplinas da área de Nutrição em Saúde Coletiva, bem como os projetos político-pedagógicos de cursos de Nutrição no Brasil.Métodos: Trata-se de estudo qualitativo, exploratório, de base documental, utilizando-se técnica do software Alceste(r) no corpus gerado pelos documentos analisados.Resultados: A partir dos 392 cursos de Nutrição existentes no Brasil em 2010, foram analisados 46 projetos político-pedagógicos e 517 planos de ensino de disciplinas em saúde coletiva. Na análise dos projetos político-pedagógicos foram consideradas três categorias: competências esperadas; ações no cuidado nutricional e operacionalização do curso, esta última correspondente a 75,5% do conteúdo. Já na análise dos planos de ensino foram classificadas as seguintes categorias: avaliação nutricional, clínica e dietoterapia no curso da vida; epidemiologia nutricional e vigilância em saúde; educação nutricional e comunicação; formação para atuação profissional; e cultura e ciências sociais. A primeira dessas categorias, correspondente a 34,2% do conteúdo, representa um dos eixos do corpus: portanto, a que compõe mais fortemente a disposição dos elementos. Essa categoria demonstrou abordar temas distantes daqueles tratados pelas demais. O outro eixo, das demais classes, estabeleceu associação menos distante no plano entre elementos, refletindo existir alguma ligação entre o que é explicitado e objetivos, conteúdos e processo de formação que correlacionam alimentação ao contexto social e à prática profissional.Conclusão: A distância dos conteúdos analisados indica uma dicotomia ao se descreverem objetivos, competências e prática profissional, apontando a insuficiência na articulação entre os elementos biológicos, as práticas sociais e a formação profissional.
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5تقرير
المؤلفون: Marcuzzi, D., Toigo, V., Boldrin, M., Chitarin, G., Bello, S. Dal, Grando, L., Luchetta, A., Pasqualotto, R., Pavei, M., Serianni, G., Zanotto, L., Agnello, R., Agostinetti, P., Agostini, M., Aprile, D., Barbisan, M., Battistella, M., Berton, G., Bigi, M., Brombin, M., Candela, V., Candeloro, V., Canton, A., Casagrande, R., Cavallini, C., Cavazzana, R., Cordaro, L., Cruz, N., Palma, M. Dalla, Dan, M., De Lorenzi, A., Delogu, R., De Muri, M., De Nardi, M., Denizeau, S., Fadone, M., Fellin, F., Ferro, A., Gaio, E., Gasparrini, C., Gnesotto, F., Jain, P., La Rosa, A., Lopez-Bruna, D., Lorenzini, R., Maistrello, A., Manduchi, G., Manfrin, S., Marconato, N., Mario, I., Martini, G., Milazzo, R., Patton, T., Peruzzo, S., Pilan, N., Pimazzoni, A., Poggi, C., Pomaro, N., Pouradier-Duteil, B., Recchia, M., Rigoni-Garola, A., Rizzetto, D., Rizzolo, A., Santoro, F., Sartori, E., Segalini, B., Shepherd, A., Siragusa, M., Sonato, P., Sottocornola, A., Spada, E., Spagnolo, S., Spolaore, M., Taliercio, C., Tinti, P., Tomsič, P., Trevisan, L., Ugoletti, M., Valente, M., Valisa, M., Veronese, F., Vignando, M., Zaccaria, P., Zagorski, R., Zaniol, B., Zaupa, M., Zuin, M., Cavenago, M., Boilson, D., Rotti, C., Decamps, H., Geli, F., Sharma, A., Veltri, P., Zacks, J., Simon, M., Paolucci, F., Garbuglia, A., Gutierrez, D., Masiello, A., Mico, G., Labate, C., Readman, P., Bragulat, E., Bailly-Maitre, L., Gomez, G., Kouzmenko, G., Albajar, F., Kashiwagi, M., Tobari, H., Kojima, A., Murayama, M., Hatakeyama, S., Oshita, E., Maejima, T., Shibata, N., Yamashita, Y., Watanabe, K., Singh, N. P., Singh, M. J., Dhola, H., Fantz, U., Heinemann, B., Wimmer, C., Wünderlich, D., Tsumori, K., Croci, G., Gorini, G., Muraro, A., Rebai, M., Tardocchi, M., Giacomelli, L., Rigamonti, D., Taccogna, F., Bruno, D., Rutigliano, M., Longo, S., Deambrosis, S., Miorin, E., Montagner, F., Tonti, A., Panin, F.
المصدر: Fusion Engineering and Design 191 (2023) 113590
مصطلحات موضوعية: Physics - Plasma Physics, Physics - Accelerator Physics
الوصف: ITER envisages the use of two heating neutral beam injectors plus an optional one as part of the auxiliary heating and current drive system. The 16.5 MW expected neutral beam power per injector is several notches higher than worldwide existing facilities. A Neutral Beam Test Facility (NBTF) was established at Consorzio RFX, exploiting the synergy of two test beds, SPIDER and MITICA. SPIDER is dedicated to developing and characterizing large efficient negative ion sources at relevant parameters in ITER-like conditions: source and accelerator located in the same vacuum where the beam propagates, immunity to electromagnetic interferences of multiple radio-frequency (RF) antennas, avoidance of RF-induced discharges on the outside of the source. Three years of experiments on SPIDER have addressed to the necessary design modifications to enable full performances. The source is presently under a long shut-down phase to incorporate learnings from the experimental campaign. Parallelly, developments on MITICA, the full-scale prototype of the ITER NBI featuring a 1 MV accelerator and ion neutralization, are underway including manufacturing of in-vessel components, while power supplies and auxiliary plants are already under final testing and commissioning. Integration, commissioning and tests of the 1MV power supplies are essential for this first-of-kind system, unparalleled both in research and industry field. The integrated test to confirm 1MV output by combining invertor systems, DC generators and transmission lines extracted errors/accidents in some components. To realize a concrete system for ITER, solutions for the repair and the improvement of the system were developed. Hence, NBTF is emerging as a necessary facility, due to the large gap with existing injectors, effectively dedicated to identify issues and find solutions to enable successful ITER NBI operations in a time bound fashion.
الوصول الحر: http://arxiv.org/abs/2304.01692Test
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6تقرير
المؤلفون: Hoffman, Christopher, Hu, Yiping, Richey, Jacob, Rizzolo, Douglas
مصطلحات موضوعية: Mathematics - Probability, Mathematical Physics
الوصف: We prove that the critical value of the one-dimensional Stochastic Sandpile Model is less than one. This verifies a conjecture of Rolla and Sidoravicius.
Comment: 44 pagesالوصول الحر: http://arxiv.org/abs/2212.08293Test
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7تقرير
المؤلفون: Barbisan, M., Cristofaro, S., Zampieri, L., Pasqualotto, R., Rizzolo, A.
المصدر: JINST 14 C12011 (2019)
مصطلحات موضوعية: Physics - Plasma Physics
الوصف: The SPIDER H-/D- ion source is currently in operation in the Neutral Beam Test facility (NBTF) at Consorzio RFX (Padova, Italy) to prove the possibility of generating up to 40 A of negative ions, with a maximum extracted current density of 350 A/m2 (H)/285 A/m2 (D) and a fraction of co-extracted electrons not greater than 0.5 (H)/1 (D). These performances are required for the realization of the ITER Neutral Beam Injector (NBI), which should deliver 16.7 MW to the plasma by means of negative ions accelerated up to 1 MeV and neutralized before being injected into the ITER tokamak. In order to obtain such high extracted current densities and low co-extracted electron fractions it is necessary to lower the work function of the surface of the acceleration system grid facing the source; this will be accomplished by coating the surfaces with Cs, routinely evaporated by three ovens. The functionality of the ovens has been tested at the CAesium oven Test Stand (CATS), hosted at NBTF. The test stand is equipped with several diagnostics, among which a Laser Absorption Spectroscopy (LAS) diagnostic. Using a tunable laser diode, the LAS diagnostic gets the high resolution absorption spectrum of the Cs 852 nm D2 line along a line of sight to measure Cs density at ground state. The paper describes the test stand and the LAS diagnostic, together with the characterization of the ovens to be installed in SPIDER. The paper will also study the systematic density underestimation effect caused by Cs ground state depopulation, as a function of laser intensity and of Cs density, in the perspective of correcting the density evaluation.
Comment: 8 pages, 4 figures. Contribution to the LAPD 2019 conference. Accepted manuscript of a published paper (embargo expired)الوصول الحر: http://arxiv.org/abs/2211.05550Test
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8تقرير
المؤلفون: Barbisan, Marco, Agnello, R., Baldini, L., Casati, G., Fadone, M., Pasqualotto, R., Rizzolo, A., Sartori, E., Serianni, G.
المصدر: Fusion Engineering and Design 194 (2023) 113923
مصطلحات موضوعية: Physics - Plasma Physics
الوصف: The Heating Neutral Beam Injectors (HNBs) for ITER will have to deliver 16.7 MW beams of H/D particles at 1 MeV energy. The beams will be produced from H-/D- ions, generated by a radiofrequency plasma source coupled to an ion acceleration system. A prototype of the ITER HNB ion source is being tested in the SPIDER experiment, part of the ITER Neutral Beam Test Facility at Consorzio RFX. Reaching the design targets for beam current density and fraction of coextracted electrons is only possible by evaporating cesium in the source, in particular on the plasma facing grid (PG) of the acceleration system. In this way the work function of the surfaces decreases, significantly increasing the amount of surface reactions that convert neutrals and positive ions into H-/D-. It is then of paramount importance to monitor the density of negative ions and the density of Cs in the proximity of the PG. Monitoring the Cs spatial distribution along the PG is also essential to guarantee the uniformity of the beam current. In SPIDER, this is possible thanks to the Cavity Ringdown Spectroscopy (CRDS) and the Laser absorption Spectroscopy diagnostics (LAS), which provide line-integrated measurements of negative ion density and neutral, ground state Cs density, respectively. The paper discusses the CRDS and LAS measurements as a function of input power and of the magnetic and electric fields used to reduce the coextraction of electrons. Negative ion density data are in qualitative agreement with the analogous measurements in Cs-free conditions. In agreement with simulations, Cs density is peaked in the center of the source; a top/bottom non uniformity is also present. Several effects of plasma on Cs deposition and negative ion production are presented.
Comment: 21 pages, 12 figures. Paper (accepted manuscript) following the poster contribution at the SOFT 2022 conference. Published in Fusion Engineering and Designالوصول الحر: http://arxiv.org/abs/2211.04901Test
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9تقرير
المؤلفون: Barbisan, M., Pasqualotto, R., Rizzolo, A.
المصدر: Fus. Eng. Des. 146, pp. 2707-2711 (2019)
مصطلحات موضوعية: Physics - Plasma Physics, Physics - Accelerator Physics
الوصف: The ITER Heating Neutral Beam (HNB) injector is required to deliver 16.7 MW power into the plasma from a neutralised beam of H-/D- negative ions, produced by an RF source and accelerated up to 1 MeV. To enhance the H-/D- production, the surface of the acceleration system grid facing the source (the plasma grid) will be coated with Cs because of its low work function. Cs will be routinely evaporated in the source by means of specific ovens. Monitoring the evaporation rate and the distribution of Cs inside the source is fundamental to get the desired performances on the ITER HNB. In order to proper design the source of the ITER HNB and to identify the best operation practices for it, the prototype RF negative ion source SPIDER has been developed and built in the Neutral Beam Test Facility at Consorzio RFX. A Laser Absorption Spectroscopy diagnostic will be installed in SPIDER for a quantitative estimation of Cs density. By using a wavelength tunable laser, the diagnostic will measure the absorption spectrum of the 852 nm line along 4 lines of sight, parallel to the plasma grid surface and close to it. From the absorption spectra the line-integrated density of Cs at ground state will be measured. The design of this diagnostic for SPIDER is presented, with details of the layout and of the key components. A preliminary installation of the diagnostic on the test stand for Cs ovens is also described, together with its first experimental results; the effect of ground state depopulation on collected measurements is discussed and partially corrected.
Comment: 6 pages, 5 figures. Contributed paper for the SOFT 2018 conference. Accepted manuscript (embargo expired)الوصول الحر: http://arxiv.org/abs/2211.01719Test
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10مؤتمر
المؤلفون: Park, Jungeun, Rizzolo, Douglas
المصدر: North American Chapter of the International Group for the Psychology of Mathematics Education. 2022 (pter).
تمت مراجعته من قبل الزملاء: Y
Page Count: 10
الواصفات: Mathematics Instruction, Korean, Contrastive Linguistics, Discourse Analysis, Phonetics, Semantics, English, Language Usage, Asians, North Americans, Language Variation, Classroom Communication, Calculus, Mathematics Teachers, Language Teachers, College Faculty, Teacher Student Relationship, Foreign Countries
مصطلحات جغرافية: United States, South Korea
مستخلص: We consider how the existence of different signifiers for mathematical objects in different languages manifests in discourse about those objects. Based on the observation that there is a common signifier "derivative" in English used for both the derivative at a point and the derivative function and two phonetically and semantically different signifiers for those objects in Korean, we explore the differences between one Korean teacher's discourse and one American teacher's discourse about the derivative. Our analysis uncovered differences in metarules regarding the use of signifiers, as well as differences in possible connections to colloquial discourse. Additionally, we found that, after both objects are defined, the American teacher's discourse shifts in a way that precludes the simultaneous use of the common signifier for both objects whereas, in the Korean teacher's discourse, there was no similar shift. [For the complete proceedings, see ED630210.]
Abstractor: As Provided
