No description available.

Formaldehyde (HCHO), plays an important role in atmospheric chemistry and is an indicator of atmospheric oxidation capacity and surface ozone photo chemistry. The Pandora Spectrometer Instruments are deployed within the NASA/ESA sponsored Pandonia Global Network designed for satellite validation of various gases in atmosphere (e.g. ozone, nitrogen dioxide and formaldehyde). In addition, Pandoras are extensively used during national (e.g. DISCOVER-AQ, OWLETS, LISTOS) and international (CINDI, KORUS-AQ) field campaigns organized to better characterise air pollution and its distribution. Recently it was discovered and shown in prior research conducted by (Spinei et al. 2020), that Pandora measurements of atmospheric HCHO are impacted by HCHO produced within the telescope assembly due to temperature dependent off-gassing from the Delrin® plastic components. The purpose of the research covered in this thesis is to provide a methodology to correct total HCHO vertical column densities measured during the past field campaigns. The methodology developed through the course of this thesis is first tested on the Pandora simulated measurements derived from the surface concentration HCHO observations during KORUS-AQ (2016) field campaign. The derived correction using synthetic data shows that the proposed methodology is accurate within 30%. The second part of the thesis characterizes heat transfer processes within the telescope assembly to estimate internal temperature as a function of ambient meteorological conditions. Considering that the Pandora instruments have mostly identical design of their telescope assemblies heat transfer coefficients derived from one pandora are expected to be applicable to all Pandoras. Convective heat transfer coefficients were derived at VT wind tunnel as a function of wind speed and telescope assembly position. Internally generated power was measured for several different instruments and averaged at $2.15 pm 0.38$ W. Total long wave emissivity was calculated at 0.63. Surface absorptivities were estimated from the material properties. Semi-empirically derived model is proposed to estimate the internal temperature based on the heat transfer parameters, ambient temperature, relative humidity, solar flux, wind speed and wind direction. The correlation between the estimated and measured internal temperatures is 0.93 R^2. Finally, the methodology is applied to the actual HCHO data collected during the KORUS-AQ campaign and the results are compared to concurrent in-situ measurements made aboard DC-8 aircraft for eight days in the months of May and June 2016. / Master of Science / Formaldehyde (HCHO), is a key indicator of atmospheric health and because of this, it is an important topic for study. The Pandora Sun Photometer is a low cost instrument developed at NASA Goddard Space Flight center. It has been used in the study of HCHO in various field campaigns. During the Korea-United States Air Quality Study (KORUS-AQ), the Long Island Sound Tropospheric Ozone Study (LISTOS) and the Ozone Water-Land Environmental Transition Study (OWLETS) the Pandora instrument design included a component manufactured from Delrin® plastic. It has recently been found to produce HCHO relative to the change in temperature. Due to the location of this component inside the telescope assembly of the Pandora instrument, the HCHO produced by the plastic was incorporated into the data invalidating the results. The purpose of this thesis is to provide a methodology for analyzing this issue through quantification of the HCHO produced by the plastic. An analysis is conducted to provide the ability to quantify the temperature internal to the telescope assembly. In addition, three methods are discussed for applying this to then quantify the proportion of HCHO that had been added to the measurements. Finally, the methods are applied to data collected during the KORUS-AQ campaign and the results are compared to a reliable set of data performed by a different instrument showing the improved agreement on eight days in the months of May and June.

Made available in DSpace on 2014-06-11T19:25:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-07Bitstream added on 2014-06-13T19:12:15Z : No. of bitstreams: 1 cruz_c_me_guara.pdf: 3366150 bytes, checksum: 08b399d3f2ebf41ec982fc0b5becc024 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Universidade Estadual Paulista (UNESP) / Neste trabalho propõe-se analisar a dinâmica do sistema Prometeu - Pandora - Anel F de Saturno, buscando soluções para alguns comportamentos anômalos observados em seus componentes. É realizada uma descrição geral, contextualizando este sistema dentro da estrutura de satélites e anéis de Saturno. A seguir, apresenta-se dados de interesse obtidos até o presente, a partir de observações realizadas pelas sondas espaciais Pioneer 11 e Voyager 1 e 2 e pelo Hubble Space Telescope, citando os pontos problemáticos deste sistema. A teoria necessária para a compreensão de alguns aspectos é colocada e discutida através de breves explanações. As principais publicações relacionadas ao tema são analisadas e comentadas, em ordem cronológica, demonstrando os avanços realizados no conhecimento deste sistema. Elabora-se uma proposta de investigação na tentativa de reproduzir os resultados mais importantes e através deles evoluir para a busca de novas informações que venham auxiliar no entendimento da dinâmica deste sistema, utilizando-se de ferramentas de simulação numérica, nas quais são acrescentados parâmetros e influências muitas vezes não-consideradas. Em trabalhos futuros, pretende-se realizar uma análise acurada dos resultados deste trabalho, introduzindo novas variáveis e elementos que possam enriquecer a teoria que vem sendo construída e que explique de maneira cada vez mais satisfatória os enigmas existentes no sistema Prometeu - Pandora - Anel F de Saturno. / In this work, we propose to analyze the dynamic of the Prometheus - Pandor - Saturn F ring system, searching for answers to the anomalous behavior of these bodies. We've made a general description, talking about this system and also about the ring and satellites structures of Saturn. Next, we show interesting data obtained until the moment from observations realized by the spacecrafts Pioneer 11 and 12 and Hubble Space Telescope, enumerating problematic points. We present the necessary theory to understand some aspects in evidence, discussing it through soon explanations. The main publications related to the topic are commented, in chronological order, showing advances in the understanding of this system. We've made an investigative offer to reproduce the most important results and through them develop new information to help the understanding of this dynamic system, using numerical simulations tools, in which we add new parameters and influences that wasn't consider. In future works, we'll try realize an accurate analyze of this work results, introducing new variables and elements to enrich the theory that has been built and to explain in a more clear manner the puzzle that exists in the Prometheus - Pandora - F ring system of Saturn.

No description available.

Jean Cousin a suscité différentes formes de réception, révélatrices des enjeux discursifs des historiographes. De même, l’analyse critique des textes qui ont été produits sur l’Eva prima Pandora a fait émerger plusieurs problématiques inhérentes au processus de l’interprétation des œuvres d’art, au discours produit sur la peinture. À partir d’un contexte documentaire lacunaire, qui concerne autant le peintre que son tableau, les auteurs ont crée des fictions révélatrices de leur orientation méthodologique et des attentes de leur époque d’expression.Nous porterons donc un regard critique sur la construction mythique de l’image de l’artiste qui s’est opérée dans les différents textes consacrés à la vie et à l’œuvre de Jean Cousin. De même, à travers les propositions sémantiques qui ont été faites de la peinture, nous mettrons en évidence les présupposés théoriques et méthodologiques du discours produit par les interprètes, afin de montrer les limites de leur démarche. Partant de ce constat, prenant en compte les différentes pistes de réflexion récemment ouvertes par l’histoire de l’art, nous étudierons l’Eva prima Pandora, en portant notre attention sur le VOIR, sur le processus de création picturale, sur la nature des intentions de Jean Cousin alors qu’il peignait l’Eva prima Pandora. / Jean Cousin has generated various forms of reception, reveling the discursive stakes in the historiographers. Also, the critical analysis of the texts which were produced on the Eva prima Pandora brings to the foreground several problematics inherent to the process of the interpretation of works of art, to the discourse produced on painting. From an incomplete documentary context, which concerns as much the painter as his painting, the authors created revealing fictions of their methodological orientation and of the expectation of their period of expression. We will thus wear a critical look at the mythical construction of the image of the artist that took place in the differents texts devoted to the life and the works of Jean Cousin. In the same way, through the semantic propositions that have been made on the painting, we will highlight the theoretical and the methodological presuppositions of the discurse produced by the interpreters, in order to show the limits of their approach.Leaving of this report, taking into account the differents tracks of reflexion recently opened by the history of art, we will study the Eva prima Pandora by paying our attention to de SEE, to the process of picturial creation, to the nature of intentions of Jean Cousin while painting the Eva prima Pandora.

Dendroecological methods play a critical role in developing our understanding of forest processes by contributing historical evidence of climate variability and the temporal characteristics of disturbance. We seek to contribute to these methods by developing a research protocol for decoupling radial-growth signatures related to climate, fire, and insect outbreaks in central Oregon. Our methods are based on three independent, crossdated tree-ring data sets: 1) a 545-year tree-ring climate reconstruction, 2) a 550-year fire history, and 3) a 250-year pandora moth outbreak history derived from host (Pinus ponderosa) and non-host (Abies grandis-Abies concolor) tree-ring chronologies. Based on these data, we use visual criteria (marker and signature rings), statistical comparisons, and Superposed Epoch Analysis (SEA) to identify the timing of growth anomalies and establish the temporal relationships between drought, climate variation (ENSO and PDO), fire events, and pandora moth (Coloradia pandora) outbreaks. Our results show pandora moth outbreaks generally coincide with periods of below-average moisture, whereas fire in central Oregon often follows a period of wetter than average conditions. Fire events in central Oregon appear to be related to shifts in hemispheric climate variability but the relationship between fire and pandora moth outbreaks remains unclear.

Coloradia pandora (Blake) is a phytophagous insect that defoliates Pinus ponderosa (Dougl. ex Laws.) in south-central Oregon. Little is known about the extent of damage this insect inflicts upon its host trees during an outbreak. In this paper, we present stem analyses on four dominant Pinus ponderosa trees that enable us to determine the amount of volume lost during each Coloradia pandora outbreak on this site for the past 450 years. We found that on average an outbreak inhibits radial growth so that an individual tree produces 0.057 m³ less wood volume than the potential growth for the duration of an individual outbreak. A total of 0.549 m³ of growth per tree was inhibited by 10 outbreaks during the lifetime of the trees, which, in this stand, equates to 9.912 m³/ha (1,700 board feet/acre) of wood suppressed over the last 450 years throughout the stand. Our results do not support previous findings of a lag in suppression onset between the canopy of the tree versus the base. Crossdating of stem analysis samples is paramount to definitively examine the potential for a lagged response throughout the

Orientador: Oton Cabo Winter / Banca: Ernesto Vieira Neto / Banca: Nelson Callegari Júnior / Resumo: Neste trabalho propõe-se analisar a dinâmica do sistema Prometeu - Pandora - Anel F de Saturno, buscando soluções para alguns comportamentos anômalos observados em seus componentes. É realizada uma descrição geral, contextualizando este sistema dentro da estrutura de satélites e anéis de Saturno. A seguir, apresenta-se dados de interesse obtidos até o presente, a partir de observações realizadas pelas sondas espaciais Pioneer 11 e Voyager 1 e 2 e pelo Hubble Space Telescope, citando os pontos problemáticos deste sistema. A teoria necessária para a compreensão de alguns aspectos é colocada e discutida através de breves explanações. As principais publicações relacionadas ao tema são analisadas e comentadas, em ordem cronológica, demonstrando os avanços realizados no conhecimento deste sistema. Elabora-se uma proposta de investigação na tentativa de reproduzir os resultados mais importantes e através deles evoluir para a busca de novas informações que venham auxiliar no entendimento da dinâmica deste sistema, utilizando-se de ferramentas de simulação numérica, nas quais são acrescentados parâmetros e influências muitas vezes não-consideradas. Em trabalhos futuros, pretende-se realizar uma análise acurada dos resultados deste trabalho, introduzindo novas variáveis e elementos que possam enriquecer a teoria que vem sendo construída e que explique de maneira cada vez mais satisfatória os enigmas existentes no sistema Prometeu - Pandora - Anel F de Saturno. / Abstract: In this work, we propose to analyze the dynamic of the Prometheus - Pandor - Saturn F ring system, searching for answers to the anomalous behavior of these bodies. We've made a general description, talking about this system and also about the ring and satellites structures of Saturn. Next, we show interesting data obtained until the moment from observations realized by the spacecrafts Pioneer 11 and 12 and Hubble Space Telescope, enumerating problematic points. We present the necessary theory to understand some aspects in evidence, discussing it through soon explanations. The main publications related to the topic are commented, in chronological order, showing advances in the understanding of this system. We've made an investigative offer to reproduce the most important results and through them develop new information to help the understanding of this dynamic system, using numerical simulations tools, in which we add new parameters and influences that wasn't consider. In future works, we'll try realize an accurate analyze of this work results, introducing new variables and elements to enrich the theory that has been built and to explain in a more clear manner the puzzle that exists in the Prometheus - Pandora - F ring system of Saturn. / Mestre

Das Trio Epiklisis (griech. = Anrufung) ist eine instrumentale Fassung der Kernszene des Fragment gebliebenen Musiktheaterstückes Pandora. Der Mythos der Büchse der Pandora unterlag seit der Antike einem ständigen Deutungswandel. Pandora erscheint entweder als Ur-Mutter oder als Femme fatale, als All-Schenkende oder als Überbringerin des Übels über die Menschheit. Letzteres korrespondierend mit der patriarchalen Sichtweise auf die Rolle der Frau in der Gesellschaft. Die erste Fassung für Flöte, Bassflöte und Schlagzeug wurde 1998 vom Ensemble Avantgarde im Leipziger Gewandhaus in der Veranstaltungsreihe musica nova gespielt.

Jean Cousin a suscité différentes formes de réception, révélatrices des enjeux discursifs des historiographes. De même, l'analyse critique des textes qui ont été produits sur l'Eva prima Pandora a fait émerger plusieurs problématiques inhérentes au processus de l'interprétation des œuvres d'art, au discours produit sur la peinture. À partir d'un contexte documentaire lacunaire, qui concerne autant le peintre que son tableau, les auteurs ont crée des fictions révélatrices de leur orientation méthodologique et des attentes de leur époque d'expression.Nous porterons donc un regard critique sur la construction mythique de l'image de l'artiste qui s'est opérée dans les différents textes consacrés à la vie et à l'œuvre de Jean Cousin. De même, à travers les propositions sémantiques qui ont été faites de la peinture, nous mettrons en évidence les présupposés théoriques et méthodologiques du discours produit par les interprètes, afin de montrer les limites de leur démarche. Partant de ce constat, prenant en compte les différentes pistes de réflexion récemment ouvertes par l'histoire de l'art, nous étudierons l'Eva prima Pandora, en portant notre attention sur le VOIR, sur le processus de création picturale, sur la nature des intentions de Jean Cousin alors qu'il peignait l'Eva prima Pandora.