A search for an exotic meson in the gamma + P decaying to delta++ + pi- + eta reaction

A Partial Waves Analysis (PWA) of γp → Δ ++X → pπ+ π - (η) data taken with the CLAS detector at Jefferson Lab is presented in this work. This reaction is of interest because the Δ++ restricts the isospin of the possible X states, leaving the PWA with a smaller combination of partial waves, making it ideal to look for exotic mesons. It was proposed by Isgur and Paton that photoproduction is a plausible source for the Jpc=1–+ state through flux tube excitation. The π1(1400) is such a state that has been produced with the use of hadron production but it has yet to be seen in photoproduction. A mass independent amplitude analysis of this channel was performed, followed by a mass dependent fit to extract the resonance parameters. The procedure used an event-based maximum likelihood method to maintain all correlations in the kinematics. The intensity and phase motion is mapped out for the contributing signals without requiring assumptions about the underlying processes. The strength of the PWA is in the analysis of the phase motion, which for resonance behavior is well defined. In the data presented, the ηπ– invariant mass spectrum shows contributions from the a0(980) and a2(1320) partial waves. No π1 was observed under a clear a2 signal after the angular distributions of the decay products were analyzed using an amplitude analysis. In addition, this dissertation discusses trends in the data, along with the implemented techniques.

Qualidade dos serviços hoteleiros: percepções dos turistas de negócios de Teresina-PI

Business tourism is one of tourist segments with different market characteristics in relation to others segmentations, such as low seasonality, there is no requirement of natural attractions, it serves as destination projection and it generates profitable larger numbers. Due to the context around business travels, the hotel so many times has a fundamental whole among the elements of the production chain in this segmentation. Business tourism in Teresina is the primary segmentation of the capital, since it represents almost 70% of hotel demand; hence this research has as objective to evaluate through the perceptions of business travelers, the level of quality services of hotels of Teresina. The research is exploratory and descriptive, of functionalist character. This study is characterized by qualitative and quantitative research, supported by a basis of methodological pluralism. For primary data collection was performed applying a suitable research instrument of SERVPERF model (Service Performance). The universe of this study were Teresina's accommodations, restricted to only those that fit in hotel category and it was inside metropolitan area of Teresina. The study subjects were business travelers who were hosted in these hotels. For the analysis, it was considered certain factors: descriptive analysis, factor analysis, correlation matrix analysis of the variables; It was still compiling a graphic of lexicons obtained in the survey about respondent's the notion of quality of vision in the hotel service; Finally, qualitative analysis was based on the theories of marketing, targeting and quality of tourism services applied. The results show that the Teresina hotel service is on a regular average, especially for Reliability and Safety dimensions were highlighted. Whereas, the factor analysis showed the emergence of two factors to explain "Empathy" dimension, one of this is about the organization and the other one is about consumer. And by Lexicometria was possible to observe the importance to the customer of other variables such as: personal aspects, price and location for this tour segmentation.

Análise da variabilidade climática sobre a produtividade da soja no município de Bom Jesus (PI)

The climate is still main responsible for the variations soybean productivity (Glycine max (L.) Merrill), exerting a limiting action on these agricultural systems. The bomjesuense cerrado, this culture has proved, over the years, an increase of cultivated areas, however, productivity does not keep the same pace, going through periods of oscillations. Thus, although the crop is added to high technology, culture has great vulnerability to climatic adversities. Thus, the present study aims to analyze possible trends in meteorological variables, which can influence the soybean yield in Bom Jesus. For this purpose, different datasets were used, as follows: i) two periods of daily data (1984-2014 and 1974-2014), both obtained from the National Meteorological Institute (INMET); ii) climate normals from 1961-1990 as defined by INMET; iii) local agricultural production data of soybean-year (1997/1998 to 2012/2013) obtained from the Municipal Agricultural Production (PAM) dataset, which is management by Brazilian Institute of Geography and Statistics (IBGE). The analysis procedures included calculations of climate normals for 1984 to 2014 period and some statistical applications, as follows: i) the Wilcoxon test, used to evaluate differences between climate normals (1961 to 1990 and 1984 to 2014); ii) the Mann-Kendall nonparametric test, in order to analyze the linear trend of agrometeorological variables (rainfall, maximum temperature, minimum temperature and diurnal range of temperature; iii) cluster analysis by Ward method and the Spearman correlation test (rs) to identify the relationship between agrometeorological variable and soybean annual productivity. We adopted a statistical significance level of 5%. The results indicate changes in seasonality of the 1984-2014 climatology with respect to past climatology for all variables analyzed, except for insolation and precipitation. However, the monthly analysis of precipitation indicate negative trend during October and positive trend in December, causing a delay in start of rainy season. If this trend is persistent this result must be considered in futures definitions of the soybean crop sowing date over the region studied. With Mann-Kendall test was possible to identify positive trends with statistical significance in maximum temperature for all month forming part of soybean cycle (from November to April), which in turn tends to cause adverse effects on crop physiology, and consequently impacts on the final yield. Was identified a significant positive correlation between soybean yield and precipitation observed in March, thus precipitation deficit in this month is harmful to the soybean crop development. No statistically significant correlation was identified among maximum temperature, minimum temperature, and DTR with annual soybean productivity due these range of meteorological variables are not limiting factors in the final soybean yield in Bom Jesus (PI). It is expected that this study will contribute to propose planning strategies considering the role of climate variability on soybean crop final yield.

I terremoti storici hanno fatto più danni nella parte nord-occidentale di Bologna: ricerca di una spiegazione geofisica per questo fenomeno

Dallo studio della sismicità storica della città di Bologna (Guidoboni e Boschi, 2003) emerge che la maggior parte dei danni causati dai terremoti è concentrata nella parte Nord e Nord-Ovest della città, a nord delle attuali vie S. Donato e S. Isaia. In questo lavoro abbiamo studiato la risposta sismica in diversi siti del centro storico di Bologna, per capirne il comportamento in caso di terremoto e verificare se i risultati fossero compatibili con i dati storici. È stata effettuata una campagna di misure geofisiche: 52 con tecnica passiva a stazione singola HVSR per misurare le frequenze di amplificazione dei sottosuoli (47 all’interno delle mura), 5 in array per misurare l’andamento delle velocità delle onde di taglio nel sottosuolo (tutte all’interno delle mura). 22 delle 47 misure H/V mostrano amplificazione nell’intervallo di frequenze tra 1 e 10 Hz, quello di interesse per le strutture del centro storico. Le cause di queste amplificazioni si ipotizzano essere un livello ghiaioso a circa 10-15 m di profondità (Fiori, 2002) in approfondimento da centro città verso est, e un livello sabbioso a circa 10 m di profondità (Amorosi, 2014). Le misure in array, invece, indicano sostanzialmente che l’estremità orientale della città storica ha rigidezze maggiori a profondità maggiori di 50 m. Il dato derivante dalla sismologia storica, in sintesi, non pare essere completamente supportato da evidenze geologiche o geofisiche: la risposta sismica all’interno delle mura di Bologna varia leggermente da punto a punto, ma senza mostrare trend applicabili ad estese macroaree. Solo l’estremo Nord-Est della città ha un comportamento amplificativo più omogeneo (amplificazione a 1-3 Hz) in linea con la geologia locale, che presenta livelli marcatamente ghiaiosi sotto i 15 m di profondità. La variabilità geologica e di risposta sismica locale è stata verificata essere molto maggiore fuori dalle mura di cinta della città.

Co-simulación HW/SW en Raspberry Pi

En el mundo de la simulación existen varios tipos de sistemas reales, entre los que se encuentran los sistemas de eventos discretos. Para poder simular estos sistemas se pueden utilizar, entre otras, herramientas basadas en el formalismo DEVS (Discrete EVents system Specification), como la utilizada en este proyecto: xDEVS. La simulación posee una importancia muy elevada en campos como la educación y la ciencia, y en ocasiones es necesario incluir datos del medio físico o sacar información al exterior del simulador. Por ello es necesario contar con herramientas que puedan realizar simulaciones utilizando sensores, actuadores, circuitos externos, etc., o lo que es lo mismo, que puedan realizar co-simulaciones entre software y hardware. De esta forma se puede facilitar el desarrollo de sistemas por medio de modelado y simulación, pudiendo extraer el hardware gradualmente y analizar los resultados en cada etapa. Este proyecto es de carácter incremental, y trata de extender la funcionalidad de la plataforma xDEVS para poder realizar co-simulaciones entre hardware y software sobre una Raspberry Pi. Para ello se van a utilizar circuitos lógicos como hardware externo y se enlazarán al simulador a través de ficheros de dispositivo, gestionados por módulos del kernel de Linux. Como caso de estudio se desarrolla la co-simulación entre hardware y software completa de un ascensor de siete plantas para mostrar el uso y funcionamiento en xDEVS, extrayendo los circuitos integrados de uno en uno.

L'activation de la PI 3-kinase par les récepteurs [bêta]-adrénergiques est dépendante du sous-type

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

L'activation de la PI 3-kinase par les récepteurs [bêta]-adrénergiques est dépendante du sous-type

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Two devices, each of which measure water velocity; on the right is an acoustic device that is permanently maintained at Gumbo Limbo by PI Rene Price; on the left is a 3D camera with a long fiberoptic lens, deployed for testing purposes by collaborator Evan Variano.

http://digitalcommons.fiu.edu/fce_lter_photos/1303/thumbnail.jpg

Assistant Professor and FCE Co-PI, John Kominoski and collaborators, Chris McVoy and Jim Brock, are investigating the foundational role of floc in the structural and functional attributes of the ridge and slough ecosystems of the Central Everglades.

http://digitalcommons.fiu.edu/fce_lter_photos/1336/thumbnail.jpg

Aplicação do método de Monte Carlo no estudo da padronização de radionuclídeos com esquema de desintegração complexos em sistema de coincidencias 4-pi-beta-gama

Tese (Doutoramento)

Desenvolvimento de um sistema eletronico com registro simultaneo de amplitude e instante de ocorrencias dos pulsos, aplicado ao metodo de coincidencias 4'pi''beta''gama'

Dissertacao (Mestrado)

Che vinca il più Forte. Proposta di traduzione, analisi e commento di "Wojna polsko-ruska pod flagą biało-czerwoną" di Dorota Masłowska.

Traduzione dal polacco in italiano - accompagnata da analisi e commento dei temi proposti - di alcuni estratti dal bestseller della scrittrice polacca adolescente, che racconta il mondo visto dagli occhi di un giovane disoccupato poco istruito di provincia. Un'immagine cruda e senza filtri della gioventù in Polonia negli anni di transizione dalla caduta del muro di Berlino all'ingresso nell'Unione Europea. Un momento storico impossibile da collocare nella ripetitività tipica dei grandi avvenimenti in Polonia, vissuto direttamente sulla pelle dei suoi protagonisti, cioè i giovani senza né passato né futuro, incapaci di coltivare il presente.

Évaluation de modèles prévisionnels de la fusariose de l'épi chez le blé sous les conditions de culture du Québec

La fusariose de l’épi est une maladie fongique des cultures céréalières au Québec. Les objectifs de ce projet étaient de vérifier l’influence de quatre facteurs (météorologie, cultivar, date de semis, fongicide) sur les rendements et la qualité du blé et d’évaluer les performances de neuf modèles à prédire l’incidence de cette maladie. Pendant deux ans, à quatre sites expérimentaux au Québec, des essais de blé de printemps et d’automne ont été implantés pour amasser un jeu de données météorologiques, phénologiques et épidémiologiques. L’application d’un fongicide a réduit la teneur en désoxynivalénol des grains dans neuf essais sur douze et a augmenté les rendements dans sept essais. De plus, les modèles prévisionnels américains et argentins ont eu de meilleures performances que les modèles canadiens et italiens quand leur seuil de décision était ajusté et que le développement du blé était suivi au champ.

Tracking changes to a microplankton community in a North Atlantic sea loch using the microplankton index PI(mp).

Microplankton plays a vital part in marine ecosystems and its importance has been recognised by the inclusion of microplankton community composition in regulatory frameworks such as the European Water Framework Directive and the Marine Strategy Framework Directive as an indicator of ecological status. Quantitative techniques are therefore required to assess the environmental status of the microplankton in a water body. Here we demonstrate the use of a method known as the Microplankton Index PI(mp) to evaluate changes in the microplankton community of the West coast Scottish Sea Loch Creran. Microplankton in this fjord has been studied since the 1970’s providing a data set spanning four decades. Our analysis compares an arbitrarily chosen reference period between 1979 and 1981 with a period between 2011 and 2013 and demonstrates that between these two periods community structure has changed considerably with a substantial drop in the numbers of observed diatoms accompanied by a rise in the number of autotrophic/mixotrophic dinoflagellates as well as an increase in the potentially toxin producing genus Pseudo-nitzschia and that these are related to changes in both the intensity and timing of local patterns of precipitation. The PI(mp) is shown to be a useful and robust method to visualise and quantify changes in the underlying structure of the microplankton community and is a powerful addition to the toolbox of techniques needed to determine the health of our seas.