Carmel River Lagoon Enhancement Project: Water Quality and Aquatic Wildlife Monitoring, 2006-7

This is a report to the California Department of Parks and Recreation. It describes water quality and aquatic invertebrate monitoring after the construction of the Carmel River Lagoon Enhancement Project. Included are data that have been collected for two years and preliminary assessment of the enhanced ecosystem. This report marks the completion of 3-years of monitoring water quality and aquatic habitat. The report adopts the same format and certain background text from previous years’ reporting by the same research group (e.g. Larson et al., 2005). (Document contains 100 pages

Observational evidence for a broken Li Spite plateau and mass-dependent Li depletion

We present NLTE Li abundances for 88 stars in the metallicity range -3.5 < [Fe/H] < -1.0. The effective temperatures are based on the infrared flux method with improved E(B-V) values obtained mostly from interstellar NaI D lines. The Li abundances were derived through MARCS models and high-quality UVES+VLT, HIRES+Keck and FIES+NOT spectra, and complemented with reliable equivalent widths from the literature. The less-depleted stars with [Fe/H] < -2.5 and [Fe/H] > -2.5 fall into two well-defined plateaus of A_{Li} = 2.18 (sigma = 0.04) and A_{Li} = 2.27 (sigma = 0.05), respectively. We show that the two plateaus are flat, unlike previous claims for a steep monotonic decrease in Li abundances with decreasing metallicities. At all metallicities we uncover a fine-structure in the Li abundances of Spite plateau stars, which we trace to Li depletion that depends on both metallicity and mass. Models including atomic diffusion and turbulent mixing seem to reproduce the observed Li depletion assuming a primordial Li abundance A_{Li} = 2.64, which agrees well with current predictions (A_{Li} = 2.72) from standard Big Bang nucleosynthesis. Adopting the Kurucz overshooting model atmospheres increases the Li abundance by +0.08 dex to A_{Li} = 2.72, which perfectly agrees with BBN+WMAP.Comment: A&A Letters, in pres

TRAÇOS ESSENCIAIS DO CONHECIMENTO MATEMÁTICO: UM ESBOÇO PRELIMINAR

TRAÇOS ESSENCIAIS DO CONHECIMENTO MATEMÁTICO:UM ESBOÇO PRELIMINA

Crítica da razão matemática: uma análise do objeto da geometria

Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências de Educação, Programa de Pós-Graduação em Educação, Florianópolis, 2016.A presente investigação, na modalidade teórica, teve como objetivo compreender a gênese, os nexos e a estrutura do objeto da Geometria, a fim de contribuir para o avanço das discussões acerca dessa temática. A partir de preocupações com a compreensão da relação entre a Matemática e a realidade material, surgiu a necessidade de entender a natureza do conhecimento geométrico e sua respectiva relação com a realidade física. A pergunta norteadora da pesquisa se traduz no seguinte questionamento: O objeto da Geometria é uma forma a priori da sensibilidade humana ou é inerente à realidade física? A referência inicial é a definição, pela literatura, de que o objeto da Geometria é as formas espaciais e as relações dos corpos físicos, abstraindo-se as demais propriedades. Defendemos a tese de que o objeto da Geometria se constitui como um reflexo e não uma parte constitutiva da realidade física ou uma forma a priori da sensibilidade humana. Para tanto, a análise requereu aprofundamentos referentes a quatro pontos que se pressupõem essenciais: (1) considerações onto-metodológicas; (2) discussão sobre matéria e consciência; (3) estudo da relação entre a Matemática e a realidade material; e (4) aprofundamento sobre o ser da Geometria. No processo de análise, demonstra-se, com base na dialética materialista, que a Geometria é a expressão ideal do movimento real da matéria, das leis físicas que regem tal movimento. Seu objeto se constitui no processo de abstração necessário à compreensão dessa realidade, uma vez que ele se encontra na mediação entre a realidade física e as formas de reflexo, ou seja, encontra-se na práxis do conhecimento.Abstract : This theoretical research aims to understand the genesis, the connections and the structure of the object of geometry in order to contribute to the progress of discussions on this theme. From concerns about the understanding of the relationship between mathematics and material reality, came the need to understand the nature of geometric knowledge and its relationship to physical reality. The research question is: The object of geometry is an a priori form of human sensibility or is inherent in the physical reality? The initial reference is the definition, in the literature, that the object of geometry is the spatial forms and relations of physical bodies, abstracting from other properties. We defend the thesis that the object of geometry is constituted as a reflection and not a constituent part of physical reality or a priori form of human sensibility. For this purpose, the analysis required insights regarding the four points which require essential: (1) onto-methodological considerations; (2) discussion about matter and consciousness; (3) study of the relationship between mathematics and physical reality; (4) deepening about being of Geometry. In the process of analysis, it is demonstrated, on the basis of dialectical materialism, that geometry is the ideal expression of the real movement of matter, the physical laws that govern such movement. Its object is the abstraction process need to understand this reality, since it is the mediation between physical reality and forms of reflection, that is, lies in the practice of knowledge

TRAÇOS ESSENCIAIS DO CONHECIMENTO MATEMÁTICO: UM ESBOÇO PRELIMINAR

TRAÇOS ESSENCIAIS DO CONHECIMENTO MATEMÁTICO:UM ESBOÇO PRELIMINA

Observational signatures for depletion in the Spite plateau: solving the cosmological Li discrepancy?

We present Li abundances for 73 stars in the metallicity range -3.5 < [Fe/H] < -1.0 using improved IRFM temperatures (Casagrande et al. 2010) with precise E(B-V) values obtained mostly from interstellar NaI D lines, and high-quality equivalent widths (errors ~ 3%). At all metallicities we uncover a fine-structure in the Li abundances of Spite plateau stars, which we trace to Li depletion that depends on both metallicity and mass. Models including atomic diffusion and turbulent mixing seem to reproduce the observed Li depletion assuming a primordial Li abundance ALi = 2.64 dex (MARCS models) or 2.72 (Kurucz overshooting models), in good agreement with current predictions (ALi = 2.72) from standard BBN. We are currently expanding our sample to have a better coverage of different evolutionary stages at the high and low metallicity ends, in order to verify our findings.Comment: In press, Light elements in the Universe, Proceedings IAU Symposium No. 268, 2010. C. Charbonnel, M. Tosi, F. Primas & C. Chiappini, ed

A NATUREZA DIALÓGICA E INVESTIGATIVA DA FILOSOFIA

Resumo: O presente artigo tem como tema a natureza dialógica da filosofia e, como principal inquietação, procura compreender a pergunta: como se configura a natureza dialógica da filosofia? A consideração de que o conhecimento humano é processual se confirma se existir um elo articulador das chamadas ciências particulares, que não são autossuficientes e tampouco autônomas. O estudo procura articular o tema abordando as ideias de diferentes autores, sem a intenção de demarcar um período histórico ou cronológico específico. O objetivo é apresentar elementos que fundamentem a natureza dialógica da filosofia, contribuindo assim ao desenvolvimento de estruturas de pensamento de nível superior.Palavras-chave: Filosofia; Natureza dialógica; Educação

Asteroseismic properties of solar-type stars observed with the NASA K2 mission: results from Campaigns 1-3 and prospects for future observations

We present an asteroseismic analysis of 33 solar-type stars observed in short cadence during Campaigns (C) 1-3 of the NASA K2 mission. We were able to extract both average seismic parameters and individual mode frequencies for stars with dominant frequencies up to ~3300{\mu}Hz, and we find that data for some targets are good enough to allow for a measurement of the rotational splitting. Modelling of the extracted parameters is performed by using grid-based methods using average parameters and individual frequencies together with spectroscopic parameters. For the target selection in C3, stars were chosen as in C1 and C2 to cover a wide range in parameter space to better understand the performance and noise characteristics. For C3 we still detected oscillations in 73% of the observed stars that we proposed. Future K2 campaigns hold great promise for the study of nearby clusters and the chemical evolution and age-metallicity relation of nearby field stars in the solar neighbourhood. We expect oscillations to be detected in ~388 short-cadence targets if the K2 mission continues until C18, which will greatly complement the ~500 detections of solar-like oscillations made for short-cadence targets during the nominal Kepler mission. For ~30-40 of these, including several members of the Hyades open cluster, we furthermore expect that inference from interferometry should be possible.Comment: 17 pages, 15 figures, 4 tables; accepted for publication in PAS

Long-term Events in Adult Patients with Clinical Stage IA-IIA Nonbulky Hodgkin's Lymphoma Treated with Four Cycles of Doxorubicin, Bleomycin, Vinblastine, and Dacarbazine and Adjuvant Radiotherapy: A Single-Institution 15-Year Follow-up

Abstract Purpose: To report on long-term events after short doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD) chemotherapy and adjuvant radiotherapy in favorable early-stage Hodgkin's lymphoma. Experimental Design: We monitored late events and causes of death over 15 years (median follow-up, 120 months) in 120 patients with nonbulky stage IA-IIA Hodgkin's lymphoma, treated with four cycles of ABVD and limited radiotherapy. Pulmonary and cardiac function tests were done throughout the follow-up. Outcome measures included cause-specific mortality, standardized mortality ratio, and standardized incidence ratio for secondary neoplasia. Results: Projected 15-year event-free and overall survival were 78% and 86%, and tumor mortality was 3%. Standardized mortality ratio was significantly higher than 1 for both males (2.8; P = 0.029) and females (9.4; P = 0.003). The risk of cardiovascular events at 5 and 12 years was 5.5% and 14%, with a median latent time of 67 months (range: 23-179 months) from the end of radiotherapy. Pulmonary toxicity developed in 8% of patients; all had received mediastinal irradiation and the median time from radiotherapy to pulmonary sequelae was 76 weeks (range: 50-123 weeks). The risk of secondary neoplasia at 5 and 12 years was 4% and 8%, respectively, with no cases of leukemia. Fertility was preserved. Conclusions: Long-term events were mostly related to radiotherapy; the role of short ABVD chemotherapy was very limited, as documented by fertility preservation and lack of secondary myelodysplasia/leukemia. A proportion of patients died from causes unrelated to disease progression and the excess mortality risk was mostly due to the occurrence of secondary neoplasms and cardiovascular diseases. A moderate dose reduction of radiotherapy from 40-44 Gy to 30-36 Gy did not decrease the risk of late complications; abolishing radiotherapy in nonbulky early-stage Hodgkin's lymphoma is being evaluated

Asteroseismology of the Hyades with K2: first detection of main-sequence solar-like oscillations in an open cluster

The Hyades open cluster was targeted during Campaign 4 (C4) of the NASA K2 mission, and short-cadence data were collected on a number of cool main-sequence stars. Here, we report results on two F-type stars that show detectable oscillations of a quality that allows asteroseismic analyses to be performed. These are the first ever detections of solar-like oscillations in main-sequence stars in an open cluster.Comment: 12 pages, 8 figures, 2 tables; accepted for publication in MNRA