To see the other types of publications on this topic, follow the link: Pinole.
Dissertations / Theses on the topic 'Pinole'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Pinole.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Téllez, Nava José Pablo. "REVALORIZACIÓN DE UN ALIMENTO TRADICIONAL PREHISPÁNICO (PINOLE) DE UNA COMUNIDAD DE LA REGIÓN MAZAHUA, ESTADO DE MÉXICO." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2019. http://hdl.handle.net/20.500.11799/105410.
Full textAbstract:
No se puede chiflar y comer pinole", refrán que ejemplifica la imposibilidad de hacer dos
cosas contrarias al mismo tiempo, referido al alimento prehispánico pinole, incluido este en
la dieta básica de diversas culturas latinas importantes. La palabra náhuatl Pinolli, significa
harina de maíz tostado, obtenida de la molienda de granos enteros de maíz tostados,
combinados con azúcar y canela, principalmente (Molina, 2019). Se consume como atole,
agua fresca, golosina regional, tortillas o tostadas, entre otros.
La localidad de Jocotitlán, Estado de México, comprende una población que acostumbra la
producción y consumo del pinole. Sin embargo, dicho alimento comienza a mostrar menos
presencia, de cara a una población con una escasa presencia de adultos mayores, que presenta
actividades económicas como agricultura donde la principal producción es el maíz
pigmentado, avena, trigo y haba de traspatio. El objetivo del presente trabajo se enfocó a la
revalorización de éste alimento tradicional prehispánico, “el pinole”, en la comunidad
mencionada de la región Mazahua del Estado de México, en la que forma parte importante
de su alimentación. Para la presente investigación, se consideró la “revalorización” como el
tomar los saber hacer y ser, de la localidad mencionada en la producción del pinole como un alimento que se encuentra ligado a su cultura y territorio. Para su elaboración, se usa
principalmente, el maíz negro cónico que es característico de los valles altos y en especial de
la localidad de estudio (Decle, 2019). Para el rescate del alimento, se utilizó la formulación
tradicional y se propusieron nuevas mesclas utilizando diferentes cereales (como trigo,
avena, cebada y chía). El presente reporte de conocimientos se realizó mediante cuatro
apartados. El primero comprendió la definición y características del problema, durante la
cual, se estableció los aspectos fundamentales del alimento, aspectos nutrimentales del maíz
(Zea mays) e ingredientes del pinole, un análisis detallado de la relación de los puntos
específicos de la problemática del presente trabajo con aquellas unidades de aprendizaje
(UA) de la currícula del Plan de Estudios (PE) del Ingeniero Agrónomo Industrial (IAI) que
fueron la herramienta para abordar lo mencionado. La segunda etapa, comprendió un análisis
de las alternativas previas de solución, iniciando con un análisis de las características de la
población en estudio, aspectos nutritivos del pinole y de los granos que se pretendían incluir
dentro de posibles formulaciones alternativas. La tercera etapa fue la solución propuesta al
problema mencionado, estandarización de la elaboración de la bebida a base de leche
elaborada con la formulación tradicional del alimento y de formulaciones alternativas con
otros granos y el establecer el diagnóstico de producción y consumo de pinole. Finalmente,
la última etapa abarcó la evaluación de la propuesta planteada, los resultados del cuestionario
para identificar el nivel de consumo y producción. En base a lo obtenido, se propusieron
formulaciones alternativas de pinole utilizando granos como trigo, chía, avena y cambiando
el edulcorante a uno reducido en calorías. El nivel de agrado de la formulación de pinole
tradicional y de las formulaciones propuestas se evaluó mediante una evaluación sensorial con una prueba descriptiva-cuantitativa que inició desde la identificación de los descriptores
para aroma y textura de este alimento, ya que no hay reportes científicos de lo mencionado.
®
La formulación con trigo (Triticum aestivum L.) y Stevia mostraron la intensidad de
descriptores muy similar al pinole tradicional, en cuando al dulzor y el resto de los
descriptores. Las formulaciones que mostraron a los descriptores de textura con una mayor
intensidad y por lo tanto, un mayor agrado por parte de los jueces, fueron espesa y cremosa,
lo cual se presentó en la formulación mencionada, la tradicional y cuando se utilizó avena
®
(Avena sativa y Stevia ). Siendo éstas las mejores opciones sugeridas.
2
Malacarne, Pierre. "Les réactions thermiques du cis pinane et du β pinène vers 300°C." Vandoeuvre-les-Nancy, INPL, 1989. http://www.theses.fr/1989NAN10473.
Full textAbstract:
Ce travail est une contribution à l'étude de l'isomérisation thermique de deux terpènes : le cis pinane et le β pinène. La détermination des paramètres cinétiques peut permettre une optimisation du procédé industriel en assurant un meilleur rendement et une meilleure sélectivité des procédés bien que ces deux paramètres soient souvent difficilement compatibles. Les réactions sont effectuées vers 300°C dans un réacteur en verre pyrex en limitant les avancements à des valeurs inferieures à 30% de manière à identifier les produits primaires de la réaction. L’influence des parois sur les vitesses d'isomérisation ainsi que l'influence d'ajouts de molécules étrangères (benzène, éthylène, hydracides, oxygène) sont étudiées. Ces essais sont effectués dans le but de contribuer à l'identification du type de mécanisme susceptible de représenter ces réactions ; une discussion entre une réaction par intermédiaire radicalaires et une réaction concertée de type Woodward-Hoffmann est présentée. Parallèlement à l'étude expérimentale, une estimation des paramètres cinétiques par la méthode de la cinétique thermochimique est entreprise. L’influence de la double liaison dans ce type de molécule est décrite en comparant les résultats de l'isomérisation du cis pinane et du β pinène
3
Ferguson, Eugene M., and David J. Hepner. "PINHOLE YAWSONDE SENSOR." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/608333.
Full textAbstract:
International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, CaliforniaThe yawsonde is a device used at the U.S. Army Research Laboratory (ARL) to investigate the in-flight behavior of spinning projectiles. The standard yawsonde consists of a pair of solar cells and slits that respond to solar rays. The sun is used as an inertial reference to measure the pitching and yawing motions of the projectile. An FM telemetry package transmits the sensor data to a ground receiving station for analysis. The standard yawsonde package is housed in an M577-type artillery fuse body. The spinning motion of the projectile serves as the sampling rate for the measurements. When the spin rate is not significantly higher than the yaw rate, multiple sets of sensors must be used to effectively increase the sampling rate. The pinhole yawsonde sensor was developed for projectiles that require multiple sets of sensors in a very limited space. This pinhole yawsonde consists of a number of sensors located behind pinholes placed around the projectile's circumference. Since each pinhole makes a yaw measurement, many measurements, or samples, are taken with each projectile spin revolution. More pinhole sensors may be added to increase the measurement sampling rate. One application of this yawsonde is to aid in evaluating the performance of tactical devices and inertial systems onboard projectiles with limited space for instrumentation.
4
Witham, Philip James. "Pinhole Neutral Atom Microscopy." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1407.
Full textAbstract:
This work presents a new form of microscopy, the instrument constructed to demonstrate it, the images produced and the image contrast mechanisms seen for the first time. Some of its future scientific potential is described and finally, recent work towards advancing the method is discussed.
Many forms of microscopy exist, each with unique advantages. Of several broad categories that they could be grouped into, those that use particle beams have proven very generally useful for micro and nano-scale imaging, including Scanning Electron, Transmission Electron, and Ion Beam microscopes. These have the disadvantage, however, of implanting electric charges into the sample, and usually at very high energy relative to the binding energy of molecules. For most materials this modifies the sample at a small scale and as we work increasingly towards the nano-scale, this is a serious problem.
The Neutral Atom Microscope (NAM) uses a beam of thermal energy (under 70 meV) non-charged atoms or molecules to probe an atomic surface. For several decades scientists have been interested in this possibility, using a focused beam. Scattering of neutral atoms provides a uniquely low-energy, surface-sensitive probe, as is known from molecular beam experiments.
We have developed a new approach, operating with the sample at a close working distance from an aperture, the need for optics to focus the beam is obviated. The demonstrated, practical performance of this "Pinhole" NAM exceeds all other attempts by great lengths by many measures. The unique images resulting and contrast mechanism discoveries are described. The future potential for nano-scale resolution is shown.
5
Hewitt, Tanya A. "Pinhole single photon emission computed tomography." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0002/MQ43359.pdf.
Full text
6
Ren, Wuwei. "Brain Imaging with a Coded Pinhole Mask." Thesis, KTH, Medicinsk teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101911.
Full text
7
Magilevičienė, Lina. "Aventrolio (Pinolen) naudojimo žieminių rapsų pasėliuose tyrimai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090608_123731-99716.
Full textAbstract:
Tyrimų vieta ir laikas. Bariūnų žemės ūkio bendrovė, Joniškio raj. Bandymai vykdyti 2007-2008 m. Bandymo lauko dirvožemis: Joniškio rajono ŽŪB „Bariūnai“ įrengto bandymo lauko dirvožemis – giliau karbonatingas giliau glėjiškas rudžemis (Endocalcari – Endohypogleyic Cambisol) (Cmg-n-w-can), sunkus priemolis ant dulkiško molio su giliau (1 m gylyje) esančiu smėlingu priemoliu. Žieminių rapsų veislė ‘Elvis‘. Dviejų metų lauko bandymų duomenys iš esmės patvirtino hipotezę, kad prieš tris savaites iki žieminių rapsų brandos apipurškus jų pasėlius Aventrolio (0,5-1,0 l ha-1) tirpalais, susidariusi tampri plėvelė ant ankštarų stipriai sumažina savaiminį ankštarų atsidarymą, o tuo pačiu ir sėklų išbyrėjimą iš jų, ko pasekoje gaunamas didesnis žieminių rapsų sėklų derliaus priedas Vertinant panaudotų priemonių efektą žieminių rapsų sėklų derliams, matyti, kad gauto derliaus priedo dydis taip pat priklausė nuo rapsų pjūties laiko. Vėlinant pjūtį aventrolio ir karbamido efekto reikšmės buvo didesnės.Research data evaluation: Two-year research data confirmed the hypothesis of the authors that leaf-spray fertilization with Pinolen (0.5 – 1.0 l ha-1) solutions of the winter rape crop three weeks before maturity stage results in the formation of the elastic capsule around siliques and prevents them from self-opening and seed eruption. Pinolen efficacy is higher in either disease or pest damaged, or late harvest crops. From the economic and labour planning points of view leaf-spray fertilization of winter rape with Pinolen should be combined with additional leaf-spray fertilization with carbamate solutions (20 kg ha-1). Leaf-spray fertilization of the winter rape with Pinolen (1.0 l ha-1) + carbamate (20 kg ha-1). The biggest rapes corn addition were received - – 0,69 t ha-1 in third variant ((1.0 l ha-1) + carbamate (20 kg ha-1). The protective efficacy of the capsule starts to decrease in more than five weeks after leaf spray fertilization of the crop with the considered solutions.
8
Aarsvold, John Nathan. "Multiple-pinhole transaxial tomography: A model and analysis." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186299.
Full textAbstract:
Multiple-pinhole transaxial tomography, a form of single-photon emission computed tomography (SPECT), is performed using novel imagers that have arrays of pinholes for image formation rather than collimators. Some such imagers, the University of Arizona (UA) transaxial systems, consist of coded apertures and modular gamma cameras and acquire data without system motion. They are the only such SPECT systems. This dissertation presents results from studies in which tomography using the UA imagers was simulated and studies in which the singular-value decompositions (SVDs) of multiple-pinhole imagers were calculated. The studies were performed to assess system configurations and to begin characterization of multiple-pinhole tomographs in terms of their SVDs. Our initial study involved simulation of systems consisting of arrays with uniformly spaced pinholes that produce multiplexed data and polygonal detectors comprising sixteen UA modules. This study shows that useful images can be obtained from static systems that have apertures that produce duplexed data and that significantly more useful images can be obtained using detectors that have resolution that is twice as fine as that of the UA modules. Numerical computation of the SVDs of several imagers including a single-pinhole imager and an orthogonal-pinhole imager produced visual displays of the object-space singular vectors of the systems. These displays demonstrate that the SVDs of multiple-pinhole systems can be expressed in terms of the SVDs of single-pinhole systems. The symmetries of all single-slice systems are rotational or reflective. The associated symmetry groups are cyclic groups or dihedral groups. The object-space singular vectors of these systems exhibit the same symmetries as the systems and exhibit multiplicities consistent with the irreducible representations of the associated groups. Results of analysis of the calculated SVDs demonstrate relationships among system symmetries, singular-vector symmetries, and irreducible representations. The results of our final study, a comparison of a system that has 64 pinholes spaced uniformly with one that has 64 pinholes spaced as a dilute uniformly redundant array, show that systems that have pinholes that are not uniformly spaced may prove the most useful.
9
Calaça, Mariana Capeletti. "Pinhole revisitada: manifestações neopictorialistas na fotografia contemporânea brasileira." Universidade Federal de Goiás, 2013. http://repositorio.bc.ufg.br/tede/handle/tede/3113.
Full textAbstract:
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2014-09-22T15:08:42Z
No. of bitstreams: 2
Calaça, Mariana Capeletti.pdf: 5089274 bytes, checksum: 030dc8ab81f5790f06ddbd1614265f0d (MD5)
license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-09-22T15:10:17Z (GMT) No. of bitstreams: 2 Calaça, Mariana Capeletti.pdf: 5089274 bytes, checksum: 030dc8ab81f5790f06ddbd1614265f0d (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)
Made available in DSpace on 2014-09-22T15:10:17Z (GMT). No. of bitstreams: 2 Calaça, Mariana Capeletti.pdf: 5089274 bytes, checksum: 030dc8ab81f5790f06ddbd1614265f0d (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2013-11-19
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
This research aims to discuss the reappropriation of photographic processes developed and popularized during the XIXth century by contemporary Brazilian artists. Based on the study of the concept of expanded or contaminated photography this work investigates such artistic manifestations, called as neopctorialist, especially those ones produced with pinhole camera. Therefore, I analyze the photographic series created with pinhole by the artist Dirceu Maués. Unlike the XIXth century Pictorialism, which claimed the statute of art for photography by approaching itself to the aesthetics of painting, neopictorialist works explore the language of photography itself, allowing its approach with other artistic media and languages.
Essa pesquisa tem como objetivo principal discutir a reapropriação de processos fotográficos artesanais do século XIX por artistas contemporâneos brasileiros. Partindo do estudo do conceito de fotografia expandida ou contaminada, o trabalho investiga essas manifestações artísticas, consideradas como neopctorialistas, sobretudo os trabalhos desenvolvidos com câmeras estenopéicas, ou pinhole. Para tanto, analiso as séries fotográficas produzidas com pinhole pelo artista paraense Dirceu Maués. Diferentemente do pictorialismo oitocentista, que reivindicava o estatuto de arte à fotografia pela aproximação com a estética da pintura, as obras neopictorialistas exploram a linguagem própria da fotografia, permitindo sua aproximação com outros meios e linguagens artísticos.
10
Al-Qallaf, Fawzia Abbas. "Tricylic pinane derivatives." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367303.
Full text
11
Patel, Ajay Balkrishna. "Molecular genetic studies of alpha pinene monooxygenase and pinene oxide decyclase." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417212.
Full text
12
Axholt, Magnus. "Pinhole Camera Calibration in the Presence of Human Noise." Doctoral thesis, Linköpings universitet, Medie- och Informationsteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-72055.
Full textAbstract:
The research work presented in this thesis is concerned with the analysis of the human body as a calibration platform for estimation of a pinhole camera model used in Augmented Reality environments mediated through Optical See-Through Head-Mounted Display. Since the quality of the calibration ultimately depends on a subject’s ability to construct visual alignments, the research effort is initially centered around user studies investigating human-induced noise, such as postural sway and head aiming precision. Knowledge about subject behavior is then applied to a sensitivity analysis in which simulations are used to determine the impact of user noise on camera parameter estimation. Quantitative evaluation of the calibration procedure is challenging since the current state of the technology does not permit access to the user’s view and measurements in the image plane as seen by the user. In an attempt to circumvent this problem, researchers have previously placed a camera in the eye socket of a mannequin, and performed both calibration and evaluation using the auxiliary signal from the camera. However, such a method does not reflect the impact of human noise during the calibration stage, and the calibration is not transferable to a human as the eyepoint of the mannequin and the intended user may not coincide. The experiments performed in this thesis use human subjects for all stages of calibration and evaluation. Moreover, some of the measurable camera parameters are verified with an external reference, addressing not only calibration precision, but also accuracy.
13
Axelsson, Natalie. "Depth of Field Rendering from Sparsely Sampled Pinhole Images." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281771.
Full textAbstract:
Optical lenses cause foreground and background objects to appear blurred, causing an effect called depth of field. Each point in the scene is projected onto the imaging plane as a semitransparent circle of confusion (CoC) with diameter depending on the distance between the point and the lens. In images rendered with a pinhole camera, the entire scene is in focus, but depth of field may be added synthetically for photorealism, aesthetics, or attention guiding purposes. However, most algorithms for depth of field rendering are either computationally expensive or produce noticeable artifacts. This report evaluates two different algorithms for depth of field rendering. Both algorithms are independent of the rendering technique. The first renders only a single pinhole image and uses a light-field based method for image synthesis. The second renders up to 12 pinhole images and uses CoC gathering to create defocus blur. Ideas from both methods are combined in a novel algorithm which uses sparse samples to approximate the light field. Our method produces a closer physical approximation than the other algorithms and avoids common artifacts. However, it may produce ghosting artifacts at low computation times. We evaluate the methods by comparing rendered images to an assumed ground truth generated with the accumulation buffer method. Physical accuracy is measured through structural similarity (SSIM) while artifacts are evaluated through visual inspection. Computation times are measured in the Inviwo software.Optiska linser får objekt i för- och bakgrunden att bli oskarpa i bilder. Varje punkt i scenen projiceras på bildplanet som en semitransparent oskärpecirkel (CoC) vars diameter beror på avståndet mellan punkten och linsen. I bilder renderade med nålhålskamera är hela scenen skarp men skärpedjup kan läggas till syntetiskt för fotorealism, estetik, eller i uppmärksamhetsledande syfte. Dock är många algoritmer för skärpedjupsrendering antingen resurskrävande eller präglade av artefakter. I denna rapport utvärderas två algoritmer för skärpedjupsrendering. Båda metoderna kan användas oberoende av renderingsteknik. Den första renderar endast en nålhålsbild och använder en ljusfältsbaserad metod för skärpedjupsrendering. Den andra renderar upp till 12 nålhålsbilder och använder CoC-samling för att skapa oskärpa. Idéer från båda algoritmerna kombineras i en ny metod som använder glesa nålhålsbilder för att approximera ljusfältet. Vår metod producerar bättre fysiska approximationer än de andra algoritmerna och undviker vanliga artefakter. Dock kan den orsaka spökbilder vid korta beräkningstider. Vi utvärderar metoderna genom att jämföra dem mot bilder genererade med accumulation buffer-tekniken som antas efterlikna den fysiska sanningen. Fysisk exakthet mäts med structural similarity (SSIM) och artefakter utvärderas visuellt. Beräkningstider mäts i programmet Inviwo
14
Gross, Kevin Anthony. "Assessing and Optimizing Pinhole SPECT Imaging Systems for Detection Tasks." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/195931.
Full textAbstract:
The subject of this dissertation is the assessment and optimization of image quality for multiple-pinhole, multiple-camera SPECT systems. These systems collect gamma-ray photons emitted from an object using pinhole apertures. Conventional measures of image quality, such as the signal-to-noise ratio or the modulation transfer function, do not predict how well a system's images can be used to perform a relevant task. This dissertation takes the stance that the ultimate measure of image quality is to measure how well images produced from a system can be used to perform a task. Furthermore, we recognize that image quality is inherently a statistical concept that must be assessed for the average task performance across a large ensemble of images.The tasks considered in this dissertation are detection tasks. Namely we consider detecting a known three-dimensional signal embedded in a three-dimensional stochastic object using the Bayesian ideal observer. Out of all possible observers (human or otherwise) the ideal observer sets the absolute upper bound for detection task performance by using all possible information in the image data. By employing a stochastic object model we can account for the effects of object variability, which has a large effect on observer performance.An imaging system whose hardware has been optimized for ideal observer detection task performance is an imaging system that maximally transfers detection task relevant information to the image data.The theory and simulation of image quality, detection tasks, and gamma-ray imaging are presented. Assessments of ideal observer detection task performance are used to optimize imaging hardware for SPECT systems as well as to rank different imaging system designs.
15
Ramshesh, Venkat K. Lemasters John J. "Luminescence lifetime imaging microscopy by confocal pinhole shifting LLIM-CPS." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1968.
Full textAbstract:
Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.Title from electronic title page (viewed Dec. 11, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Biomedical Engineering." Discipline: Biomedical Engineering; Department/School: Medicine.
16
Hirai, Taku. "Evaluation of myocardial infarct size in rat heart by pinhole SPECT." Kyoto University, 2000. http://hdl.handle.net/2433/180846.
Full text
17
Silva, Nívea Rohling da. "O gênero entrevista pingue-pongue." Florianópolis, SC, 2007. http://repositorio.ufsc.br/xmlui/handle/123456789/90539.
Full textAbstract:
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Lingüística.Made available in DSpace on 2012-10-23T12:10:36Z (GMT). No. of bitstreams: 1 245444.pdf: 5126985 bytes, checksum: 5c72ca432d2057a943bec94e2a704c34 (MD5)
O objetivo desta pesquisa é elaborar uma análise interpretativa do gênero do discurso entrevista pingue-pongue do jornalismo de revista. A fundamentação teórico-medotodológica insere-se na linha dialógica da linguagem e dos gêneros do Círculo de Bakhtin. Os dados de pesquisa são compostos por todas as 52 (cinqüenta e duas) entrevistas pingue-pongues, publicadas em três revistas semanais de circulação nacional, CartaCapital, ISTOÉ e Veja, no período de 4 de outubro a 8 de novembro de 2006, época de cobertura do segundo turno das eleições presidenciais no Brasil. A metodologia de análise e de apresentação dos dados baseou-se em Rodrigues (2001), que propõe duas grandes categorias de análise interligadas entre si: a dimensão social e a dimensão verbal do gênero pesquisado. Na dimensão social do gênero, consideramos como elementos relevantes as particularidades da esfera sócio-discursiva do jornalismo e jornalismo de revista (segmentação da esfera do jornalismo) e a situação de interação discursiva que se estabelece entre autor e leitor, mediada pela esfera jornalística. A autoria do gênero é de responsabilidade da esfera do jornalismo e ocorre em uma relação de co-autoria entre jornalista e editoria. O interlocutor previsto corresponde ao leitor da revista; sendo este um leitor de revista semanal de informação que tem interesse pelos diversos acontecimentos sociais da atualidade. Já a partir da análise da dimensão verbal, podemos dizer que o gênero entrevista pingue-pongue constitui-se em um enunciado citado da entrevista face a face e, mais que isso, em uma reenunciação dessa na qual ocorre um enquadramento do discurso do entrevistado, que é valorado na entrevista pingue-pongue. Destacamos as regularidades ligadas ao horizonte temático do gênero, que permitiram o seguinte agrupamento das entrevistas: a) entrevistas pingue-pongues cujo objeto do discurso é o próprio entrevistado; b) entrevistas pingue-pongues cujo objeto do discurso é o conjunto dos acontecimentos sociais. Apesar desse agrupamento, consideramos que o efetivo conteúdo temático da entrevista centraliza-se no entrevistado e seu discurso, o que justifica a acentuada valoração axiológica nesse gênero, uma vez que esse "homem" (o entrevistado) já vem envolvido em um "fundo" aperceptivo dos discursos alheios. Assim, o horizonte valorativo se sobressai aos demais horizontes (temporal, espacial e temático), o que equivale a dizer que é a valoração axiológica que está "orquestrando" a entrevista pingue-pongue; ela permite o gênero de "movimentar" na edição. A valoração axiológica se semiotiza no gênero a partir de índices sociais de valor que são: o lugar de ancoragem na revista, o papel social do entrevistado, a extensão textual do gênero e o conteúdo semântico objetal das perguntas e das respostas. A partir do lugar de ancoragem na revista foi possível agrupar as entrevistas em: a) entrevistas pingue-pongues nucleares; b) entrevistas pingue-pongues nucelares satélites. As entrevistas nucleares são publicadas nas páginas vermelhas e nas seções principais da revista ISTOÉ, nas páginas amarelas e seções principais da revista Veja e em qualquer seção na CartaCapital. São as entrevistas que mantêm independência temática e ocupam os espaços mais privilegiados nas edições das revistas. As entrevistas satélites, a seu turno, são publicadas em seções diversas como, por exemplo, as seções destinadas a colunismo social (Holofote (Veja) e Gente (Veja)), nas seções dedicadas a discutir os "bastidores" da política nacional (Brasil Confidencial (ISTOÉ)) e nas seções que discutem comportamento, profissão, saúde, etc. (Seção GUIA Veja (Veja)). As entrevistas satélites, não raras vezes, cumprem a tarefa de "completar" e/ou "reafirmar" um "já-dito" na edição da revista, e ainda caracterizam-se por "disputar espaço" com outros gêneros dentro de uma mesma página, o que significa dizer que têm um lugar menos privilegiado na revista. Em síntese, a análise dos índices sociais de valor mostrou que o "fio condutor" do gênero pesquisado é o entrevistado e o seu discurso, que é "encharcado" de valoração, é "desacreditado", é "contestado" ou "enaltecido", a partir de seu papel social validado pelas "opiniões" sociais e pelos já-ditos sobre esse objeto (entrevistado e seu discurso).
18
Marchi, Dipl Andrea. "Internal flow and spray characteristics of an outwards opening pintle-type gasoline-injector." Thesis, City University London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508012.
Full text
19
Kleczyk, Ewa Jadwiga. "Incidence and Costs of Pinhole Leak Corrosion and Corporate Cost of Capital Borrowing." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29901.
Full textAbstract:
The first part of this doctorate dissertation examines the factors influencing the occurrence and costs of pinhole leak corrosion as well as the household decisions for corrosion prevention and plumbing material selection. Three mail surveys of households were used to elicit the experiences with leaks as well as the optimal corrosion prevention and material choices. Probability modeling (i.e. MNL) and linear regression analysis were used to analyze survey responses. Pinhole leak occurrences were found associated with pipe type installed, property age, pipe failure history, and dwelling distance from a water treatment plant. The number and location of pinhole leaks in the dwelling and the pipe type are associated with the financial costs of pinhole leaks. The corrosion prevention choices as well as the plumbing materials depended on the risk of corrosion and cost associated with each option. Previous experiences with pinhole leak impacted the decision for household choices. Faster responses to pinhole leak outbreaks by utility managers and policymakers in terms of advising homeowners on the best ways of responding to leaks would assist homeowners in reducing costs of pinhole leak repairs and associated damages.
The second part of this document deals with the debt financing issues. Debt financing decisions are made simultaneously by lenders and borrowers. Since lenders are unable to observe directly the firms’ investment decisions, the banks offer contracts based up on firms’ observable characteristics (i.e. wealth and size) and the prevailing market conditions. When deciding on the financing decisions, firms also take into account the changes in macroeconomic variables in order to lower the cost of borrowing. As a result, the goal for this article is to examine empirically the hypothesis of the effect of the debt determinant as well as the macroeconomic variables on the debt maturity structure. A reduced form of the simultaneous financing decisions model is estimated by employing several OLS estimation methods. The empirical findings offer strong support for firms with few growth options, large, and of low quality having more long-term debt in their capital structure. There was, however, no clear support for the impact of macroeconomic variables on debt maturity as some variables were not statistically significant.Ph. D.
20
Farooqi, Owais Ehtisham. "An Assessment and Modeling of Copper Plumbing pipe Failures due to Pinhole Leaks." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/33918.
Full textAbstract:
Pinhole leaks in copper plumbing pipes are a big concern for the homeowners. The problem is spread across the nation and remains a threat to plumbing systems of all ages. Due to the absence of a single acceptable mechanistic theory no preventive measure is available to date. Most of the present mechanistic theories are based on analysis of failed pipe samples however an objective comparison with other pipes that did not fail is seldom made. The variability in hydraulic and water quality parameters has made the problem complex and unquantifiable in terms of plumbing susceptibility to pinhole leaks.
The present work determines the spatial and temporal spread of pinhole leaks across United States. The hotspot communities are identified based on repair histories and surveys. An assessment of variability in water quality is presented based on nationwide water quality data. A synthesis of causal factors is presented and a scoring system for copper pitting is developed using goal programming. A probabilistic model is presented to evaluate optimal replacement time for plumbing systems. Methodologies for mechanistic modeling based on corrosion thermodynamics and kinetics are presented.Master of Science
21
Isik, Güldem. "Bifiltration of air polluted with alpha-pinene." Thesis, Växjö University, School of Technology and Design, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1864.
Full textAbstract:
The main objective of this investigation is to determine the effect of different physical and chemical parameters on the performance of biofilters, treating hydrophobic organic compounds. pinene was used as a model substance. Alpha-pinene is commonly found in wood, and therefore found at wood storage facilities and wood processing industries [1].
In this experiment two biofilter which were in equal size, were used. Both of them were filled with perlite for treating the alpha pinene contaminated air. One of the columns contained perlite partially coated with silicone oil to make the surface of perlite more hydrophobic. The filters were run at 5, 2.5 and 1.5 l min-1 air flow rate. The results showed that the silicone oil amended filter performed better at 2.5 l/min with a maximum removal rate of 20 g / (m3 h) in comparison with 15 g/ (m3 h) for the filter without oil. The efficiency was approximately the same for both filters at 1.5 and 5 l/min (40 compare to 35 g/m3 bed h). The flow rate was then set to 2.5 l/min once more. The results showed that the removal rate had increased to approximately 35 g/ (m3 h) and that the efficiency of both filters was approximately the same. The difference in results between the initial run and the later at 2.5 l/min is probably depending on that the microorganisms had become adapted to the α-pinene and that the microorganism communities developed differently in the two filters.
Syftet med denna studie var att undersöka om en ökning av biofilterytans hydrofobicitet kan förbättra effektiviteten med avseende på nedbrytning av en hydrofob förening såsom -pinen. En hydrofob yta skulle kunna medföra en ökning i adsorption av hydrofoba föroreningar vilket i sin tur skulle kunna öka tillgängligheten hos föroreningarna för mikroorganismerna. Försöken utfördes med hjälp av två biofilter fyllda med perlit. Ett filter fylldes med obehandlad perlit medan det andra filtret fylldes med perlit som blandats med silikonlja. Båda filtren ympades med mikroorganismer som växt på träflis. Dessa mikroorganismer är anpassade för att bryta ner -pinen då denna förening friges i stora mängder från trä. Resultaten visar att filtret innehållande perlit täckt med silikonolja var mer effektivt med avseende på nedbrytning avpinen under den första tiden av studien (de första 30 dagarna). Skillnaden i effektivitet mellan filtren minskade dock betydligt med tiden så att skillnaden inte var signifikant under resten av studien. Prover från vätskefasen från de båda filtren undersöktes i mikroskop. Dessa studier visade att olika mikroorganismer dominerade i de båda filtren. Filtret innehållande oljetäckt perlit dominerades av stavformiga bakterier medan filtret innehållande obehandlad perlit dominerades av kocker. Båda filtren innehöll en blandkultur av kocker och stavar. Dessutom växte svamp i båda filtren. Dessa resultat visar att en förändring av ytans hydrofobicitet inte bara kan leda till en ökad adsorption av förorening utan den kan också leda till att andra mikroorganismer får en dominerande roll i filtret. Den maximala nedbrytningshastigheten låg mellan 35 och 40 g pinen/(m3h) under hela studien förutom de 30 första dagarna oberoende av luftflödeshastighet (1,5 , 2,5 respektive 5 l/min). Den maximala nedbrytningshastigheten under inledningen av försöket var 15 g/(m3 h) för filtret innehållande obehandlad perlit och 20 g/(m3h) för filtret innehållande oljetäckt perlit. Luftflödet var 2,5 l/min under den inledande perioden. Ökningen i nedbrytningshastighet med tiden indikerar att mikroorganismerna anpassade sig till miljön. Den relativt konstanta nedbrytningshastigheten under resten av studien indikerar att det var de biokemiska reaktionerna som var hastighetsbegränsande och att masstransporten inte hade någon dominerande roll med avseende på att begränsa hastigheten.
22
Fonseca, Amanda Ferreira Branco da. "Câmera e pincel : grafismos corporais e processos fotográficos /." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/153424.
Full textAbstract:
Submitted by Amanda Ferreira Branco da Fonseca null (amandafbf@yahoo.com.br) on 2018-04-02T20:07:20Z
No. of bitstreams: 1
dissertacao completa.pdf: 33600023 bytes, checksum: 702c8f20bc86d7f1ea78e999d3683c4b (MD5)Approved for entry into archive by Laura Mariane de Andrade null (laura.andrade@ia.unesp.br) on 2018-04-06T16:38:58Z (GMT) No. of bitstreams: 1 fonseca_afb_me_ia.pdf: 33581509 bytes, checksum: 56d530dd4450d6c59b281a01999ca35e (MD5)
Made available in DSpace on 2018-04-06T16:38:58Z (GMT). No. of bitstreams: 1 fonseca_afb_me_ia.pdf: 33581509 bytes, checksum: 56d530dd4450d6c59b281a01999ca35e (MD5) Previous issue date: 2017-12-08
A presente dissertação aborda minha produção no campo da fotografia expandida, em ensaios que unem pintura corporal e processos fotográficos históricos. Também inclui o desenvolvimento da série Religare, que é o corpus resultante dessa pesquisa de mestrado. Trata-se de um ensaio realizado com a própria artista como modelo da pintura corporal, e revelado com a técnica goma bicromatada sobre madeira, em grandes dimensões (algumas medindo cerca de 88 x 150 cm). Tanto no caso dos ensaios anteriores a essa dissertação, quanto em Religare, os processos são marcados por experimentação e desenvolvimento de técnicas, em geral híbridas, envolvendo: desenho manual dos grafismos corporais, captação digital das imagens, processamento digital, impressão em transparências e revelação das imagens usando processos fotográficos artesanais (marrom Van Dyck, cianotipia e goma bicromatada). Buscando referências na prática da pintura corporal realizada por diversas etnias indígenas, e em posturas do Yoga, esses ensaios desenvolvem uma poética de resgate da vivência do Sagrado, que parece distante na vida urbana contemporânea. O corpo é o instrumento para isso, é o estar aqui e agora. Nos ensaios apresentados, o corpo ganha destaque, conferido pela pintura corporal, pela referência a posturas de Yoga, e pelo trabalho artesanal, também presente na pintura corporal e nos processos fotográficos. Também há destaque para o “corpo” da fotografia, a materialidade do meio, tendo como suportes o papel, o tecido e a madeira.
The present dissertation approaches my production in expanded photography, in photographic essays that unite body painting and early photographic processes. It also includes the development of Religare, essay that is this master's research resulting corpus. The artist herself is model for body painting, and the images are printed in large sizes (some about 88 x 150 cm) using gum bichromate on wood. In previous essays, as in Religare, the processes are based on technical experiment and development, which are usually hybrids, including: handmade drawing of body painting, digital capture of images, digital processing, digital negatives printing and photography printing using early photographic processes (Van Dyck brown, cyanotype and gum bichromate). Seeking references in the indigenous practice of body painting and Yoga poses, those essays develop a Sacred experience rescue poetics, due to this experience seeming distant from contemporaneous urban life. The body is the instrument for this experience, it's "being here and now". At the presented essays, the body is highlighted by the body painting, the reference to yoga poses, and by handcraft process, which includes body painting and early photographic processes. Also the photography "body" is highlighted, the media materiality, embodied by paper, fabric and wood.
23
Balakrishnan, Sreenath. "A Numerical Elastic Model for Deforming Bat Pinnae." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/36406.
Full textAbstract:
In bats, the directivity patterns for reception are shaped by the surface geometry of the
pinnae. Since many bat species are capable of large ear deformations, these beampatterns
can be time-variant. To investigate this time-variance using numerical methods, a digital
model that is capable of representing the pinna geometry during the entire deformation cycle
has been developed.
Due to large deformations and occlusions, some of the surfaces relevant to sound diffraction
may not be visible and the geometry of the entire pinna has to be computed from limited
data. This has been achieved by combining a complete digital model of the pinna in one
position with time-variant sparse sets of three dimensional landmark data. The landmark
positions were estimated using stereo vision methods. A finite element model based on
elasticity was constructed from CT scans of the pinna post mortem. This elastic model
was deformed to provide a good fit to the positions of the landmarks and retain values of
smoothness and surface energy comparable to life. This model was able to handle ratios
of data to degrees of freedom around 1:5000 and still effect life-like deformations with an
acceptable goodness of fit.
Master of Science
24
Jauniūtė, Silvija. "Savianalizės raiška fotografijoje." Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100903_130305-65412.
Full textAbstract:
Šiame darbe analizuojamos sąvojo aš paieškos mene, taip pat teorijų apie sąvajį aš analizės filosofiniu ir psichologiniu aspektais. Praktiniame darbe pateikiamas fotografijų ciklas - pinhole fototehnika atlikti autoportretai.In this work analysed the self search in art, and the theories analyze of the philosophical and psychological aspects. In practical work presents series of photographs - self-portraits by pinhole technology.
25
Hesterman, Jacob Yost. "The Multi-Module, Multi-Resolution SPECT System: A Tool for Variable-Pinhole, Small-Animal Imaging." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/196056.
Full textAbstract:
The multi-module, multi-resolution SPECT system (M3R) was developed and evaluated at the University of Arizona's Center for Gamma-Ray Imaging (CGRI). The system consists of four modular gamma cameras stationed around a Cerrobend shielding assembly. Slots machined into the shielding allow for the easy interchange of pinhole apertures, providing M3R with excellent hardware flexibility. Motivation for the system included serving as a prototype for a tabletop, small-animal SPECT system, acting as a testbed for image quality by enabling the experimental validation of imaging theory, and aiding in the development of techniques for the emerging field of adaptive SPECT imaging.Development of the system included design and construction of the shielding assembly and pinhole apertures. The issue of pinhole design and evaluation represents a recurring theme of the presented work. Existing calibration methods were adapted for use with M3R. A new algorithm, the contracting grid-search algorithm, that is capable of being executed in hardware was developed for use in position estimation. The algorithm was successfully applied in software and progress was made in hardware implementation. Special equipment and interpolation techniques were also developed to deal with M3R unique system design and calibration requirements. A code library was created to simplify the many image processing steps required to realize successful analysis of measured image and calibration data and to achieve reconstruction.Observer studies were performed using both projection data and reconstructed images. These observer studies sought to explore signal-detection and activity estimation for various pinhole apertures. Special attention was paid to object variability, including the development and statistical analysis of a phantom capable of generating multiple realizations of a random, textured background. The results of these studies indicate potential for multiple-pinhole, multiplexed apertures but reemphasize the need for careful design and implementation of such complicated imaging elements. Several other techniques were investigated for the evaluation of pinhole apertures. These techniques are less quantitative than rigorous objective methods but offer rapid insight into an aperture's resolution, artifact, and sensitivity characteristics and may find use as predictors of observer performance for certain tasks or in the rapid aperture assessment necessary for successful adaptive SPECT imaging.
26
Ventura-Broncales, Carol-Cristina. "La educomunicación como un modelo para educar : el caso del proyecto fotográfico Pinhole Verte Mirarte." Bachelor's thesis, Universidad de Lima, 2016. http://repositorio.ulima.edu.pe/handle/ulima/2953.
Full textAbstract:
El presente artículo aspira dar a conocer los aportes educomunicativos del Proyecto Fotográfico Pinhole Verte MirArte, cuyo principal objetivo fue reconocer y despertar la mirada interna de niños, niñas y adolescentes de bajos recursos por medio del concepto y la práctica de la fotografía pinhole. Se trata de emplear la fotografía como una herramienta didáctica, la cual busca desarrollar la inteligencia racional y emotiva, así como el pensamiento crítico y la reflexión sobre la imagen. A través de un trabajo cualitativo, se consiguió evaluar los logros obtenidos en el desarrollo de competencias y análisis crítico de la realidad de los niños, niñas y adolescentes. Los resultados permiten reconocer la fotografía como una herramienta que genera más posibilidades de trabajar sobre los prejuicios de la persona que mira, dado que deja mucho más espacio a la imaginación. Por lo tanto, se construye una perspectiva hacia el desarrollo de habilidades narrativas en los beneficiarios a través de la creación de historias por medio de la fotografía, de esa manera ellos despiertan su capacidad crítica y reflexiva. Adicionalmente, la participación entre los beneficiaros sobre la base de objetivos comunes refuerza el trabajo colaborativo.Trabajos de investigación
27
Malcuit, J., S. Stedman, and J. Silvertooth. "Short Staple Variety Demonstrations, Pinal County." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/204838.
Full text
28
Matheus, Isabella do Carmo. "Proposta de metodologia para dimensionamento da espessura de núcleos argilosos em barragens baseada em ensaios Pinhole." reponame:Repositório Institucional da UnB, 2006. http://repositorio.unb.br/handle/10482/6512.
Full textAbstract:
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, 2006.Submitted by Érika Rayanne Carvalho (carvalho.erika@ymail.com) on 2009-11-02T16:11:53Z No. of bitstreams: 1 2006_Isabella do Carmo Matheus.pdf: 5809059 bytes, checksum: 0a73e9984b4241a50533a223616794d3 (MD5)
Approved for entry into archive by Luanna Maia(luanna@bce.unb.br) on 2011-01-19T13:07:16Z (GMT) No. of bitstreams: 1 2006_Isabella do Carmo Matheus.pdf: 5809059 bytes, checksum: 0a73e9984b4241a50533a223616794d3 (MD5)
Made available in DSpace on 2011-01-19T13:07:16Z (GMT). No. of bitstreams: 1 2006_Isabella do Carmo Matheus.pdf: 5809059 bytes, checksum: 0a73e9984b4241a50533a223616794d3 (MD5) Previous issue date: 2006-06-02
Nesta pesquisa é apresentada uma metodologia de dimensionamento de núcleos argilosos em barragens de enrocamento, baseada na realização de ensaios pinhole. É proposto estudar até quanto é possível reduzir o volume de solo argiloso compactado, por meio da utilização de núcleos mais esbeltos, adotando-se um critério de gradiente hidráulico de carreamento deste material. Neste estudo está também incluída a verificação do comportamento do núcleo esbelto quanto à predisposição ao fenômeno de transferência de tensões. Para tanto foi necessário, inicialmente, estudar a aplicabilidade do ensaio pinhole na identificação da ocorrência de erosão interna em solos compactados e na quantificação do gradiente máximo suportado pelo solo antes que um fenômeno erosivo tenha início. Uma campanha de ensaios pinhole foi realizada para três diferentes materiais, provenientes das barragens de Corumbá I e Peixe-Angical, e em diversas condições de compactação, para as quais foi avaliada a influência do grau de compactação e da umidade nos valores do gradiente hidráulico crítico obtidos. A partir desta campanha foi possível estabelecer uma metodologia de análise do ensaio pinhole, objetivando a identificação do gradiente hidráulico crítico ao carreamento de partículas. Foi constatada a importância do registro de observações a respeito de alterações no comportamento do corpo de prova ao longo da execução do ensaio, associado à avaliação visual das curvas de carregamento e descarregamento. Identificada a ocorrência da erosão, o valor do gradiente crítico pode ser obtido a partir de uma avaliação numérica das curvas do ensaio. Com esse valor, a metodologia de dimensionamento da espessura do núcleo pode ser aplicada, calculando-se inicialmente a espessura mínima que seja segura quanto ao fenômeno de erosão. A partir desta espessura, a análise tensão-deformação da barragem permite identificar a ocorrência de fenômenos de transferência de tensões. Nos casos em que o nível de arqueamento leva à ocorrência de fraturamento hidráulico, a espessura do núcleo ou a sua inclinação é alterada até que o potencial à ocorrência de fraturamento seja eliminado. Pode ser verificado que em núcleos inclinados à montante os níveis de transferência de tensões são menores do que em núcleos centrais. Foi verificada boa coerência entre os resultados da caracterização da erodibilidade e respectivo icr obtidos por meio de ensaios pinhole indicando a adequação do uso deste ensaio na obtenção do parâmetro de projeto demandado. A aplicação da metodologia de dimensionamento da base do núcleo proposta ao caso da Barragem de Corumbá I levou a verificação da possibilidade de redução das dimensões do núcleo, quando considerados os estudos de erodibilidade e transferência de tensões, realizados nesta pesquisa. ______________________________________________________________________________ ABSTRACT
A design methodology for clayed cores of earth-rock dams, based on pinhole tests, is presented in this research. The main objective is to study the possible reduction of the compacted volume of clayed soils, adopting thinner cores, which are specified by a hydraulic gradient criterion, considering the erosion potential of the core material. This study also verifies the thin-core behaviour, in relation to its trend to stress transfer (arching). The methodology initiated testing the applicability of the pinhole test to identify piping in compacted soils and to quantify the limit hydraulic gradient stand by the soil before starting this phenomenon. A pinhole testing programme was carried out in three different materials, obtained from Corumbá I and Peixe-Angical dams, and compacted in different conditions, aiming to evaluate the effect of the degree of compaction and water content on the critical hydraulic gradient values. Based on these lab results, it was possible to establish an analysis procedure of the pinhole tests, in order to define the critical hydraulic gradient, in charge of triggering the soil erosion. It is worth to mention the importance of mapping the changes in the specimen behaviour during testing, associated to the loading and unloading cycles. Once piping occurs, the value of the critical hydraulic gradient can be obtained by a numerical evaluation of the test results. This value is used to design the thickness of the dam core, first calculating the minimum thickness in order to prevent piping. Taking into account this minimum core thickness, stress-strain analyses allow to evaluate the stress transfer (arching) phenomenon. In those cases where the stress arching level leads to hydraulic fracturing, the core thickness or inclination is altered till the hydraulic fracturing potential is brought to a safe level. It was founded that stress transfer levels are lower in upstream cores than in central ones. It was also found a good correlation between the erosion characterization results and respective critical hydraulic gradients obtained from pinhole tests, showing the suitability of this test for obtaining this design parameter. The application of this methodology for designing the core thickness of the Corumbá I dam indicated the possibility of reducing its dimensions, considering the studies of piping and stress transfer (arching) carried out in this research.
29
Pennington, Timothy L. "Miniaturized 3--D Mapping System Using a Fiber Optic Coupler as a Young's Double Pinhole Interferometer." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/27993.
Full textAbstract:
Three--dimensional mapping has many applications including robot navigation, medical diagnosis and industrial inspection. However, many applications remain unfilled due to the large size and complex nature of typical 3--D mapping systems. The use of fiber optics allows the miniaturization and simplification of many optical systems.
This research used a fiber optic coupler to project a fringe pattern onto an object to be profiled. The two outputs fibers of the coupler were brought close together to form the pinholes of a Young's Double Pinhole Interferometer. This provides the advantages of this simple interferometer without the disadvantage of power loss by the customary method of spatially filtering a collimated laser beam with a pair of pinholes. The shape of the object is determined by analyzing the fringe pattern. The system developed has a resolution of 0.1mm and a measurement error less than 1.5\% of the object's depth.
The use of fiber optics provides many advantages including: remote location of the laser source (which also means remote location of heat sources, a critical requirement for many applications); easy accommodation of several laser sources, including gas lasers and high--power, low--cost fiber pigtailed laser diodes; and variation of source wavelength without disturbing the pinholes. The principal advantages of this mapping system over existing methods are its small size, minimum number of critically aligned components, and remote location of the laser sources.Ph. D.
30
Hauptmann, Peter Hans. "Komponenten des cGMP-Systems im Corpus pineale des Menschen." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974208701.
Full text
31
Jackson, Benjamin. "Molecular genetics of #alpha# pinene metabolism in Pseudomonas fluorescens." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343598.
Full text
32
Leonard, Gordon. "Acoustic modelling of bat pinnae utilising the TLM method." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/20204.
Full textAbstract:
This thesis describes the numerical modelling of bioacoustic structures, the focus being the outer ear or pinnae of the Rufous Horseshoe bat (Rhinolophus rouxii). There have been several novel developments derived from this work including: • A method of calculating directionality based on the sphere with a distribution of measuring points such that each lies in an equal area segment. • Performance estimation of the pinna by considering the directionality of an equivalent radiating aperture. • A simple synthetic geometry that appears to give similar performance to a bat pinna. The outcome of applying the methods have yielded results that agree with measurements, indeed, this work is the first time TLM has been applied to a structure of this kind. It paves the way towards a greater understanding of bioacoustics and ultimately towards generating synthetic structures that can perform as well as those found in the natural world.
33
Church, Elizabeth Ann. "An Autoethnographic Study of the Effectiveness of Teaching Art Appreciation through Pinhole Photography to Home Schooled Students." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/art_design_theses/17.
Full textAbstract:
This research studies the effectiveness of teaching art appreciation to home schooled children ages 10-17 through a DBAE curriculum in pinhole photography via a weekend workshop. An autoethnographic approach to recording data about the students’ learning and my experience as their teacher was used in the research. Data was recorded as journal notes during and after each workshop from my experiences as their teacher and analyzed according to a grounded theory based on open coding. The workshop was open for registration of up to 25 home schooled students of any race, male or female, from the ages of 10 - 17. While the research reports a successful change in students’ appreciation of photography as a result of the workshop, parental values proved to be both an obstacle and area of potential future research.
34
Church, Elizabeth Ann. "An autoenthnographic study of the effectiveness of teaching art appreciation through pinhole photography to home schooled students." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-08012007-234936/.
Full textAbstract:
Thesis (M.A.E.)--Georgia State University, 2007.Title from file title page. Paula Eubanks, committee chair; Akela Reason, Melody Milbrandt, committee members. Electronic text (153 p. : ill.) : digital, PDF file. Description based on contents viewed Oct. 31, 2007. Includes bibliographical references (p. 151-153).
35
Orozco, David S. B. Massachusetts Institute of Technology. "Implementation of scattering pinhole diagnostic for detection of fusion products on CR-39 at high particle fluence." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92697.
Full textAbstract:
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 35-36).
Many Inertial Confinement Fusion (ICF) experiments use solid-state nuclear track detector CR-39 as a means to detect different types of nuclear products. Until recently, it was difficult to use CR-39 in experiments with very high yields because particle tracks would overlap. A scattering pinhole has been implemented in order to reduce the fluence on the CR-39. This paper details the design and implementation of a scattering pinhole to detect protons born from D3He nuclear reactions: D +3 He = p+(14.7MeV) + [alpha](3.7MeV). To do so, basic models relating the scattering angle to material thickness and atomic number were developed. The scattering pinhole reduced the fluence on the CR-39 enough to successfully count all the tracks and calculate a product yield. A proton yield of 2.25e10 t 0.17e10 was calculated and falls within half a standard deviation of the proton yield found with the Wedge Range Filter (WRF) spectrometer, the value being 2.19e10. The image on the CR-39 was predicted to be s = 0.957mm t 0.092mm. This correlates with measured size [sigma] = 0.873mm, supporting the validity of the models. To further explore the nuclear this nuclear reaction, the design challenges for detecting 3.7MeV alpha particles was also explored.
by David Orozco.
S.B.
36
Malcuit, J., S. Stedman, and J. Silvertooth. "Short Staple Variety Demonstrations, Pinal County, 1989." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/208301.
Full textAbstract:
Short staple variety demonstrations were conducted in Pinal County in 1989 at the Prechel and Benedict Farms near Coolidge Az. Twelve varieties were included in the demonstration at Prechel Farms. Results from the analysis showed significant differences among varieties. Seedcotton yields in this test ranged from 4826 to 2844 lbs. acre⁻¹ for STV BR-110 and S-55 respectively. Seven varieties were included in the demonstration at Benedict Farms. Results from the analysis showed significant differences among varieties. Seedcotton yields in this test ranged from 4127 to 3530 lbs. acre⁻¹ for STV BR-110 and DP-50 respectively.
37
Malcuit, J. E., S. Stedman, and J. C. Silvertooth. "Short Staple Variety Demonstration, Pinal County, 1990." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/208328.
Full textAbstract:
Short staple variety trials were conducted for three years at Prechel Farms near Coolidge At. Six varieties were included in 1988, twelve in 1989, and eight in 1990. Results from the statistical analysis showed significant differences among varieties in each of the three tests. Lint yields ranged from 908 to 1313 lbs. lint acre⁻¹ in 1988, 2844 to 4827 lbs. seedcotton acre⁻¹ in 1989, and 695 to 1059 lbs. lint acre⁻¹ in 1990. Those varieties that were medium to short-season maturity types yielded higher than long season maturity types in the 1988 and 1990 seasons. The reverse was true in the 1989 season.
38
Friscourt, Frederic. "Synthesis and application of pinene-pyridine derivatives in asymmetric catalysis." Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/532/.
Full textAbstract:
The research described herein focuses on the synthesis of chiral pinene-pyridine derivatives, and their application in asymmetric catalysis. Both transition metal catalysed and organocatalytic transformations were investigated. Chiral pyridine-phosphines based on α-pinene were synthesised and applied as efficient P,N-ligands for the enantioselective palladium(II)-catalysed Baeyer-Villiger oxidation of prochiral 3-substituted cyclobutanones to furnish chiral γ-butyrolactones in up to 81% ee. Complexes of these ligands with iridium can also promote asymmetric hydrogenation of olefins in up to 83% ee. Novel N,N’-dioxides were synthesised from α-pinene and a range of 2-pyridine-acetophenones by employing Kröhnke annulation reaction as the key cyclisation step. Although poor enantioselectivity was achieved (up to 12% ee), high reactivity of the catalysts is, however, promising.
39
Silva, Viviane Ferreira da [UNESP]. "O gênero entrevista pingue-pongue na esfera do jornalismo cultural." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115845.
Full textAbstract:
Made available in DSpace on 2015-03-03T11:52:36Z (GMT). No. of bitstreams: 0
Previous issue date: 2014-04-25Bitstream added on 2015-03-03T12:06:22Z : No. of bitstreams: 1
000809682.pdf: 3991387 bytes, checksum: da746f5f5a88c076381be2c286d6d890 (MD5)Este trabalho faz um estudo do gênero do discurso entrevista pingue-pongue na esfera do jornalismo cultural. Para que o estudo seja realizado, o presente trabalho segue a linha teórico-metodológica do Círculo de Bakhtin e seus comentadores, que trata das enunciações e as relações dialógicas produzidas no discurso assim como do ato ético e estético na construção do sentido. Também reflexões realizadas por Sá, Silva e Sobral ajudam a delinear os mecanismos de análise, uma vez que esses estudiosos desenvolvem pesquisas sobre o gênero entrevista pingue-pongue. A pesquisa se preocupa em analisar a construção do acabamento estético a partir das relações dialógicas que se estabelecem entre o eu e o outro e como os valores sociais vão sendo ressignificados nesta esfera. A análise do córpus, composto por três entrevistas pingue-pongues publicadas pela revista Bravo! nos meses de fevereiro, setembro e dezembro de 2012, com personalidades do cenário nacional, respectivamente, Fernando Henrique Cardoso, Marisa Monte e Gilberto Gil, permite perceber o movimento do próprio gênero na esfera jornalística por meio da construção do acabamento estético e do direcionamento temático dados pelo autor. A partir das análises, pode-se levantar indícios de que o gênero estudado apresenta especificidades, como a tendência a um estilo mais literário do autor quando na esfera da cultura, e uma valorização da ordem do privado dos entrevistados, diferentemente do que ocorre em outras esferas
This research presents the genre of discourse interview ping pong in the sphere on the cultural journalism. For the study to be carried out, this work follows the theoretical and methodological approach of Bakhtin's Circle and his commentators, dealing with utterances and dialogical relations produced in discourse as well as the ethical and aesthetic act for the construction of meaning. Also reflections made by Sá, Silva and Sobral help to delineate the mechanisms of analysis, as these scholars developed research on gender ping-pong interview. The research is concerned with analyzing the construction of aesthetic finish from the dialogical relations which are established between self and other and how social values are being reinterpreted in this sphere. The analysis of the corpus, consisting of three interviews ping pongs published by Bravo! in February, September and December 2012, with personalities from the national scene, respectively, Fernando Henrique Cardoso, Marisa Monte and Gilberto Gil, allows us to understand the movement of the genre itself in the journalistic sphere through the construction of aesthetic finish and thematic direction given by the author. The analyzes point evidence that gender has specific characteristics, the trend towards a more literary style of the author when in the sphere of culture, an appreciation of the order of the private respondents, differently from what happens in other spheres
40
Silva, Viviane Ferreira da. "O gênero entrevista pingue-pongue na esfera do jornalismo cultural /." Araraquara, 2014. http://hdl.handle.net/11449/115845.
Full textAbstract:
Orientador: Marina Célia MendonçaBanca: Alessandra Del Ré
Banca: Wedencley Alves
Resumo: Este trabalho faz um estudo do gênero do discurso entrevista pingue-pongue na esfera do jornalismo cultural. Para que o estudo seja realizado, o presente trabalho segue a linha teórico-metodológica do Círculo de Bakhtin e seus comentadores, que trata das enunciações e as relações dialógicas produzidas no discurso assim como do ato ético e estético na construção do sentido. Também reflexões realizadas por Sá, Silva e Sobral ajudam a delinear os mecanismos de análise, uma vez que esses estudiosos desenvolvem pesquisas sobre o gênero entrevista pingue-pongue. A pesquisa se preocupa em analisar a construção do acabamento estético a partir das relações dialógicas que se estabelecem entre o eu e o outro e como os valores sociais vão sendo ressignificados nesta esfera. A análise do córpus, composto por três entrevistas pingue-pongues publicadas pela revista Bravo! nos meses de fevereiro, setembro e dezembro de 2012, com personalidades do cenário nacional, respectivamente, Fernando Henrique Cardoso, Marisa Monte e Gilberto Gil, permite perceber o movimento do próprio gênero na esfera jornalística por meio da construção do acabamento estético e do direcionamento temático dados pelo autor. A partir das análises, pode-se levantar indícios de que o gênero estudado apresenta especificidades, como a tendência a um estilo mais literário do autor quando na esfera da cultura, e uma valorização da ordem do privado dos entrevistados, diferentemente do que ocorre em outras esferas
Abstract: This research presents the genre of discourse interview ping pong in the sphere on the cultural journalism. For the study to be carried out, this work follows the theoretical and methodological approach of Bakhtin's Circle and his commentators, dealing with utterances and dialogical relations produced in discourse as well as the ethical and aesthetic act for the construction of meaning. Also reflections made by Sá, Silva and Sobral help to delineate the mechanisms of analysis, as these scholars developed research on gender ping-pong interview. The research is concerned with analyzing the construction of aesthetic finish from the dialogical relations which are established between self and other and how social values are being reinterpreted in this sphere. The analysis of the corpus, consisting of three interviews ping pongs published by Bravo! in February, September and December 2012, with personalities from the national scene, respectively, Fernando Henrique Cardoso, Marisa Monte and Gilberto Gil, allows us to understand the movement of the genre itself in the journalistic sphere through the construction of aesthetic finish and thematic direction given by the author. The analyzes point evidence that gender has specific characteristics, the trend towards a more literary style of the author when in the sphere of culture, an appreciation of the order of the private respondents, differently from what happens in other spheres
Mestre
41
Burke, Linda. "Transience." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/2988.
Full textAbstract:
Lightness and darkness pervades much of my work which is visible in images of abandoned, secluded spaces. Light symbolizes hope and joy. It can also reference the spiritual connotation of new life as well as the end of life. The physical movement of light, its ephemeral quality, and its reflectivity is the deciding factor in my choice for using a camera without a lens and using traditional painting techniques. In my photographic mixed media work, I am drawn to the unique qualities of the pinhole camera, the exposure of light on the surface of film yields imagery that blurs the line between the familiar and the ethereal. Exposures from a pinhole camera materialize over time, perhaps seconds, perhaps minutes. There is no viewfinder to preview the image, which makes capturing an image pleasingly accidental. In my oil painting, I use photographic references and a limited palette. Much like my photographs, I create areas of light juxtaposed against deep shadow. The processes of using overlapping layers of transparent glazes over a warm-toned ground are used to achieve this chiaroscuro effect. By using these approaches, a sense of the dramatic is conveyed sometimes in contrast to the quiet nature of the subject.
42
Vicevic, Marija. "Catalytic rearrangement of alpha pinene oxide using spinning disc reactor technology." Thesis, University of Newcastle Upon Tyne, 2004. http://hdl.handle.net/10443/661.
Full textAbstract:
This investigation explores the use of environmentally friendly solid acid catalysts based on immobilised Lewis acids in liquid phase organic reaction using the spinning disc reactor. The reaction studied was the rearrangement of a-pinene oxide to campholenic aldehyde, which is an important intermediate used by the fragrance industry in the synthesis of santalol (sandalwood). By focusing on liquid phase reactions and by addressing the particular problems associated with catalysis for such reaction systems the aim of this work is to develop new catalytic technology of value to the highly successful UK fine and speciality chemical industries, where acid catalysis is widely used but normally involves the use of corrosive and toxic reagents, unselective processes and the production of unacceptable levels of hazardous waste. The performance of a compact catalytic spinning disc reactor (SDR) with good heat and mass transfer characteristics for continuous conversion of a-pinene oxide to campholenic aldehyde using supported Zn(OTf)2 catalysts was studied. The spinning disc runs were performed at various conditions and conversion and selectivity were monitored. A 100% conversion of a-pinene oxide was easily achieved for most of the conditions. Lower residence time enhanced selectivity towards aldehyde up to a maximum of 82%, at 60% conversion. SDR empirical models were developed and activation energies determined for each catalyst used. Comparison of SDR with batch process is also made. Results suggest that the catalytic SDR can significantly enhance the reaction rates, reaction selectivity and improve process safety whilst eliminating the loss of catalyst. The findings of this investigation indicate that the vision of realising a truly intensified plant using green chemistry to achieve greener technology is a real possibility.
43
Clulow, Stephen A. "The resistance of Pisum to Mycosphaerella pinodes (Berk. and Blox.) Vestergr." Thesis, University of East Anglia, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235619.
Full text
44
Malcuit, J. E., S. Stedman, and J. C. Silvertooth. "Short Staple Variety Demonstration, Pinal County, 1988-1991." College of Agriculture, University of Arizona (Tucson, AZ), 1992. http://hdl.handle.net/10150/208633.
Full textAbstract:
Short staple variety trials were conducted for four years at Prechel Farms near Coolidge Az. Six varieties were included in 1988, twelve in 1989, eight in 1990, and eight in 1991. Results from the statistical analysis showed significant differences among varieties in each of the four tests. Lint yields ranged from 908 to 1313 lbs. lint acre⁻¹ in 1988, 2844 to 4827 lbs. seedcotton acre⁻¹ in 1989, 695 to 1059 lbs. lint acre⁻¹ in 1990, and 1065 to 1286 lbs. lint acre⁻¹ in 1991. Those varieties that were medium to short- season maturity types yielded higher than long season maturity types in the 1988 and 1990 seasons. The reverse was true in the 1989 season and results were mixed in 1991.
45
Silva, Carlos Borges da, and Instituto de Engenharia Nuclear. "Medida da captação de iodo pela tireóide: análise comparativa entre sistema gama-câmara com colimador "Pinhole" e sistema 13S002." Instituto de Engenharia Nuclear, 2001. http://carpedien.ien.gov.br:8080/handle/ien/1904.
Full textAbstract:
Submitted by Marcele Costal de Castro (costalcastro@gmail.com) on 2017-09-11T17:15:57Z
No. of bitstreams: 1
CARLOS BORGES DA SILVA M.pdf: 7893155 bytes, checksum: 84e1a26e71c1b5d623dacd41d743b105 (MD5)Made available in DSpace on 2017-09-11T17:15:57Z (GMT). No. of bitstreams: 1 CARLOS BORGES DA SILVA M.pdf: 7893155 bytes, checksum: 84e1a26e71c1b5d623dacd41d743b105 (MD5) Previous issue date: 2001-01
A medida da captação do radio iodo absorvido na glândula tireoide é geralmente considerada direta e precisa, porém, têm-se observado certas discrepâncias nos resultados obtidos quando são realizadas comparações entre medidas, utilizando-se equipamentos diferentes. Este estudo tenta encontrar a causa destas diferenças nos ensaios realizados com sonda de captação convencional e uma gama-câmara. Estas discrepâncias podem ser atribuídas a diferenças entre populações de pacientes, problemas nos próprios equipamentos ou erros associados aos procedimentos experimentais. Neste trabalho são apresentados os resultados das medidas comparativas de captação "in-vitro" utilizando simulador de pescoço e de captação "in-vivo" em 40 pacientes 4 horas após a administração de 123 I, efetuadas com um Sistema Gama-Câmara Ohio Nuclear modelo Sigma 410 com colimador tipo "pinhole" e com o Sistema de Contagem para Medicina Nuclear modelo 13S002, também conhecido como Sonda de Captação para Tireoide, desenvolvido no Instituto de Engenharia Nuclear. O conjunto de dados demonstra que, embora a literatura referente ao assunto relate alguns resultados não satisfatórios, tanto o Sistema 13S002 quanto o Sistema Gama-Câmara Ohio podem ser utilizados indistintamente para aplicações de diagnóstico de tireoide com nível de confiança de 99 %, desde que sejam seguidos todos os parâmetros de geometria descritos neste trabalho.
The thyroid uptake measurements are common in medical uses and are considered a direct and precise form of diagnostic, however, different results have been observed as measurements thyroid. uptake are taken using distinct equipment. This study attempts to find the cause of the differences between a thyroid uptake probe and a gamma camera. These discrepancies can be associated to the different patients samples, equipment's problems or operator procedures errors. This work presents the results of comparative uptake measurements performed in a neck phantom and a 4-hour thyroid uptake study in 40 patients, using a Gamma Camera Ohio Nuclear model Sigma 410 with a pinhole collimator and Nuclear Medicine System model 13S002, developed by Instituto de Engenharia Nuclear. The results observed show that in spite of non satisfactory results commented in literature, both the System 13S002 and System Gamma Camera Ohio can be used in uptake thyroid diagnostic with statistical confidence degree of 99 %, since be followed all the procedures of geometry herein described.
46
Maïonchi-Pino, Norbert Magnan Annie. "Le traitement syllabique chez l'enfant normo-lecteur et dyslexique rôle des caractéristiques linguistiques du français /." Lyon : Université Lumière Lyon 2, 2008. http://demeter.univ-lyon2.fr/sdx/theses/lyon2/2008/maionchi-pino_n.
Full text
47
Pinkel, Christoph [Verfasser], and Heiner [Akademischer Betreuer] Stuckenschmidt. "i3MAGE: Incremental, Interactive, Inter-Model Mapping Generation / Christoph Pinkel. Betreuer: Heiner Stuckenschmidt." Mannheim : Universitätsbibliothek Mannheim, 2016. http://d-nb.info/1104129094/34.
Full text
48
Freitas, Nathália de. "A representação visual do pincel atômico em Goiás na década de 1980." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/4577.
Full textAbstract:
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2015-05-25T11:05:40Z
No. of bitstreams: 5
Dissertação - Nathália de Freitas - 2014 - (1).pdf: 1014797 bytes, checksum: 4645cf56a5159366e731ab4b79ac3a01 (MD5)
Dissertação - Nathália de Freitas - 2014 - (2).pdf: 2298354 bytes, checksum: ab3d0ea89db5bb378476dd5a14dd99df (MD5)
Dissertação - Nathália de Freitas - 2014 - (3).pdf: 3167290 bytes, checksum: d59b9ceeb4c7aacb668fa96341c95567 (MD5)
Dissertação - Nathália de Freitas - 2014 - (4).pdf: 10129354 bytes, checksum: 44fb58435cd5013e8945eebae7e80d31 (MD5)
license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2015-05-25T11:14:23Z (GMT) No. of bitstreams: 5 Dissertação - Nathália de Freitas - 2014 - (1).pdf: 1014797 bytes, checksum: 4645cf56a5159366e731ab4b79ac3a01 (MD5) Dissertação - Nathália de Freitas - 2014 - (2).pdf: 2298354 bytes, checksum: ab3d0ea89db5bb378476dd5a14dd99df (MD5) Dissertação - Nathália de Freitas - 2014 - (3).pdf: 3167290 bytes, checksum: d59b9ceeb4c7aacb668fa96341c95567 (MD5) Dissertação - Nathália de Freitas - 2014 - (4).pdf: 10129354 bytes, checksum: 44fb58435cd5013e8945eebae7e80d31 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)
Made available in DSpace on 2015-05-25T11:14:23Z (GMT). No. of bitstreams: 5 Dissertação - Nathália de Freitas - 2014 - (1).pdf: 1014797 bytes, checksum: 4645cf56a5159366e731ab4b79ac3a01 (MD5) Dissertação - Nathália de Freitas - 2014 - (2).pdf: 2298354 bytes, checksum: ab3d0ea89db5bb378476dd5a14dd99df (MD5) Dissertação - Nathália de Freitas - 2014 - (3).pdf: 3167290 bytes, checksum: d59b9ceeb4c7aacb668fa96341c95567 (MD5) Dissertação - Nathália de Freitas - 2014 - (4).pdf: 10129354 bytes, checksum: 44fb58435cd5013e8945eebae7e80d31 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2014-03-27
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
The work "The visual representation of Pincel Atômico in Goiás in the 1980’s" talks about the scenario of urban art in Goiás in the late 1980s . The group, which consisted of two graffiti artists, was one of the developers of graffiti art on the streets of Goiânia and neighboring towns. Their art used to leave colorful inscriptions on the walls, with much criticism, humor and joy, using spray paint for such results. The group had an active stance in the art scene in Goiás during the 1980’s, a decade in which the streets were used as a place for artistic expression , addressing controversial issues which involved political, moral and social issues of national and international scope such as AIDS, rock and radioactivity. Its performance was particularly importante, due to the fact that the state of Goiás was going through a difficult time as a result of radiological accident triggered by the rupture of a capsule of cesium -137, which occurred in Goiânia in 1987 . This unique art, which turns the city into a high potentially cognitive "urban text", allows us to investigate our relationship with it, often unconsciously. The cultural history of a city is also seen and examined by visual representations installed in its urban area.
O trabalho “A representação visual do Pincel Atômico em Goiás na década de 1980” aborda o cenário da arte urbana goiana no fim da década de 1980. O grupo, constituído por dois grafiteiros, foi um dos responsáveis pelo desenvolvimento da arte do grafite nas ruas de Goiânia e cidades vizinhas, deixando os muros coloridos e com inscrições dotadas de muita crítica, humor e alegria, usando para tanto o spray. O Pincel Atômico teve uma postura atuante no cenário artístico goiano na década de 1980, época em que as ruas eram utilizadas como espaço de expressão artística, abordando temáticas polêmicas, que envolviam questões políticas, morais e sociais de âmbito nacional e internacional como a AIDS, o rock e a radioatividade. Sua atuação teve particular importância quando Goiás passava por um momento delicado em consequência do acidente radiológico desencadeado pelo rompimento de uma cápsula de Césio-137, ocorrido em Goiânia em 1987. Essa arte singular, que faz da cidade um “texto urbano” de alto potencial cognitivo, nos permite investigar nossas relações com ela, muitas vezes de modo inconsciente. A história cultural de uma cidade também se faz vista e analisada pelas representações visuais instaladas no seu perímetro urbano.
49
Quillien, Aurélie. "Spécification des sous-types neuronaux dans la glande pinéale du poisson zèbre." Toulouse 3, 2010. http://www.theses.fr/2010TOU30211.
Full textAbstract:
Mon projet de thèse a consisté à identifier les mécanismes à l'origine de la spécification des deux sous-types cellulaires de la glande pinéale du poisson zèbre : les photorécepteurs (PR) et les neurones de projection (NP). Nous avons pu démontrer, tout d'abord, que la voie de signalisation Notch est impliquée dans la spécification des neurones de l'épiphyse en réprimant l'identité NP. Les résultats obtenus suggèrent également qu'un second signal est requis pour la promotion du destin PR. Afin d'identifier ce signal, j'ai perturbé l'activité de sept voies de signalisation connues pour jouer un rôle lors de la spécification des neurones. Cette approche a permis de démontrer que la voie de signalisation BMP promeut le destin PR et régule la compétence des cellules à répondre à Notch. De plus, mes résultats préliminaires suggèrent que la voie Wnt pourrait induire le destin NP et que la voie de signalisation EGF agit en amont de la voie NotchCell fate diversification is a prerequisite for the formation of a functional vertebrate nervous system. Given the high level of complexity of the vertebrate nervous system, understanding the bases of neuronal subtype diversification, as well as the mechanisms by which future neurons simultaneously process information from multiple pathways to establish their identity remain challenging issues. The zebrafish pineal gland offers a simple system to address questions concerning the integration of signaling pathways during neural specification as it contains only two types of neurons - photoreceptors and projection neurons. The aim of my thesis was to characterize which mechanisms are implicated during the specification of these neurons. We have recently shown that the Notch pathway is involved in the specification of these neuronal subtypes. However, while Notch appears sufficient to inhibit the projection neuron specification program it is not able to induce a photoreceptor fate, leading us to postulate the existence of a photoreceptor-inducing signal (Cau et al. , 2008). To search for this signal we performed a small unbiased screen, thus the activity of seven signalling pathways knonw to be involved in neuronal subtype specification (Wnt, BMP, Retinoic Acid, FGF, EGF, Shh and TGFbeta) was impaired. The BMP, Wnt and EGF signaling pathway emerged as interesting regulators of neuronal specification in the pineal gland. Indeed, the BMP signaling pathway promotes the photoreceptor fate, and is moreover required as a competence factor for Notch to inhibit the PN fate. Furthermore, my preliminary results suggest that the Wnt signaling pathway could function as a projection neuron-inducing signal and that EGF signaling acts upstream of Notch to inhibit a projection neuron program. Finally, specification of epiphysial neurons required at least four signaling pathways whose interactions probably enable a fine-grained regulation of the number of neurons and their identity
50
Claudet, Cyrille. "Elasticité de la chromatine : étude avec une pince optique." Phd thesis, Université Joseph Fourier (Grenoble), 2005. http://tel.archives-ouvertes.fr/tel-00109955.
Full textAbstract:
Cette thèse s'inscrit dans la recherche des propriétés mécaniques de la fibre de chromatine et de leur rôle. Après un rappel de connaissances sur la chromatine, nous introduisons les techniques de manipulations de molécules uniques en biophysique. Nous esposons ensuite le dispositif de pince optique que nous avons mis en œuvre ainsi que les développements plus récents de manipulations à l'aide d'un champ magnétique rotatif.Nous discutons alors des résultats obtenus sur la transition B-S de l'ADN et tentons de les interpréter en invoquant une différence de comportement sous étirement selon que la séquence est riche en A-T ou en G-C.
Les résultats des étirements sur trois principaux types de chromatine sont ensuite présentés : force nécessaire à la rupture d'un nucléosome et longueur d'ADN libérée. En faisant varier les conditions d'étirements (essentiellement concentrations salines et concentrations en chromatine exogène), en modifiant la composition de la fibre de chromatine, nous montrons que le nucléosome n'est pas une entité stable dans les conditions diluées classique des expériences sur molécules uniques. Nous confirmons par ailleurs ce résultats avec des expériences de dilution suivit d'analyse sur gel d'électrophorèse. Les résultats établis après stabilisation nous invitent à poursuivre la discussion du déroulement du nucléosome sous tension à partir d'un modèle existant. Sur la base de ces résultats, nous tentons alors de donner une interprétation du déroulement du nucléosome que nous recadrons dans le contexte de la régulation génétique à l'échelle du nucléofilament.