Volatilidade dos retornos e governança: um estudo de eventos da crise do subprime

The financial crisis that occurred between the years 2007 and 2008, known as the subprime crisis, has highlighted the governance of companies in Brazil and worldwide. To monitor the financial risk, quantitative tools of risk management were created in the 1990s, after several financial disasters. The market turmoil has also led companies to invest in the development and use of information, which are applied as tools to support process control and decision making. Numerous empirical studies on informational efficiency of the market have been made inside and outside Brazil, revealing whether the prices reflect the information available instantly. The creation of different levels of corporate governance on BOVESPA, in 2000, made the firms had greater impairment in relation to its shareholders with greater transparency in their information. The purpose of this study is to analyze how the subprime financial crisis has affected, between January 2007 and December 2009, the volatility of stock returns in the BM&BOVESPA of companies with greater liquidity at different levels of corporate governance. From studies of time series and through the studies of events, econometric tests were performed by the EVIEWS, and through the results obtained it became evident that the adoption of good practices of corporate governance affect the volatility of returns of companies

Militância, organização e mobilização antiproibicionista da maconha: coletivos, eventos e marchas em Natal (RN)

Based on the proposal entitled anti-prohibitionist, contrary to prohibition and illegality of cannabis and its use, the anti-prohibitionist Collectives proposes to discuss the topic of drugs, especially marijuana, aiming decriminalization and legalization of this psychoactive. With this idea was articulated anti-prohibitionist movement in Natal, by organizing collectives that discuss issues related to drug use and conduct activities directed to this issue, such as Marijuana Marches and Cycles of Debates anti-prohibitionist. In this study we sought to understand the positioning in social and cultural terms, the marijuana users participating of the collectives, on the situation of illegality of their actions, in front of social, legal and moral question involved in the illicit psychoactive, through initiatives conferences, events and demonstrations for this purpose

Estudo estatístico sobre eventos de precipitação intensa no nordeste do Brasil

The Northeast of Brazil (NEB) shows high climate variability, ranging from semiarid regions to a rainy regions. According to the latest report of the Intergovernmental Panel on Climate Change, the NEB is highly susceptible to climate change, and also heavy rainfall events (HRE). However, few climatology studies about these episodes were performed, thus the objective main research is to compute the climatology and trend of the episodes number and the daily rainfall rate associated with HRE in the NEB and its climatologically homogeneous sub regions; relate them to the weak rainfall events and normal rainfall events. The daily rainfall data of the hydrometeorological network managed by the Agência Nacional de Águas, from 1972 to 2002. For selection of rainfall events used the technique of quantiles and the trend was identified using the Mann-Kendall test. The sub regions were obtained by cluster analysis, using as similarity measure the Euclidean distance and Ward agglomerative hierarchical method. The results show that the seasonality of the NEB is being intensified, i.e., the dry season is becoming drier and wet season getting wet. The El Niño and La Niña influence more on the amount of events regarding the intensity, but the sub-regions this influence is less noticeable. Using daily data reanalysis ERAInterim fields of anomalies of the composites of meteorological variables were calculated for the coast of the NEB, to characterize the synoptic environment. The Upper-level cyclonic vortex and the South atlantic convergene zone were identified as the main weather systems responsible for training of EPI on the coastland

Eventos de oralidade em aulas de língua portuguesa: um estudo de caso

Este trabajo tiene como objetivo investigar el tratamiento ofrecido al estudio de la lenguaje en la modalidad oral en clases de lengua portuguesa en los 3º y 4º ciclos del Nivel Fundamental a la luz de concepciones sociointeracionistas de lenguaje. Para tal, tomamos como referencia las contribuciones de Bakhtin (1992) Marcuschi (2005), Batista (2001), Antunes (2009), Bagno (2002), Suassuna (2009), Ramos (2002), Castilho (2000), Oliveira (2003), entre otros, como también tomamos como referencia los objetivos establecidos en los programas oficiales, entre los cuales están los PCN de lengua portuguesa, el PNLD y el regimiento escolar. El campo de pesquisa seleccionado fue una escuela pública de la ciudad de Parnamirim donde los datos fueran colectados en visitas, en las entrevistas grabadas con los sujetos y también durante las observaciones a las clases. Hecho estos procedimientos de coleta de datos se hizo su análisis que estuvo vinculada al referencial teórico. Los resultados de la pesquisa indican características en el tratamiento ofrecido al lenguaje oral que refleja, principalmente, una concepción de lengua y lenguaje adoptada por los profesores aún muy vinculada a las concepciones estructuralistas, sin lograr una práctica que contemple la oralidad como objeto de estudio

Eventos externos e internos da infecção de larvas e ninfas de Rhipicephalus sanguineus por Metarhizium anisopliae

Examinaram-se a adesão, a germinação, a penetração e a colonização de larvas e ninfas de Rhipicephalus sanguineus por Metarhizium anisopliae, assim como as lesões infringidas pelo fungo nas respectivas fases do ciclo de vida do ácaro. Realizaram-se infecções experimentais em 11 grupos contendo 250 larvas e 11 grupos contendo 75 ninfas de R. sanguineus, por meio de banho, durante três minutos sob agitação manual, em suspensão contendo 10(8) conídios/ml do fungo. Nos grupos-controles, o banho foi realizado usando o veículo da suspensão. Larvas e ninfas foram processadas para um estudo histopatológico e de microscopia eletrônica de varredura nos seguintes tempos após a infecção: uma e 18 horas, e um, dois, três, quatro, cinco, seis, sete, nove e 11 dias. A germinação dos conídios ocorreu em até 18 horas pós-inoculação, e o fungo penetrou nas larvas e ninfas através do tegumento, dois e três dias após a infecção, respectivamente. Após penetração, o fungo invadiu o corpo das larvas e ninfas, promovendo uma colonização difusa, sem preferência aparente por tecidos específicos. Lesões significativas não foram observadas. A morte das larvas e ninfas ocorreu no terceiro e quarto dias pós-infecção, e a esporulação do patógeno sobre o cadáver foi iniciada no sexto dia pós-infecção.

Turismo de eventos como estratégia no combate à sazonalidade: uma análise na hotelaria de Natal - RN

The aim of this work is to analyse the tourism events and the performance of this segment from market as strategy in the combat of Natal's hotel seasonality, in the executives/managers's vision from this sector. Two searches were realized to turn available this study: Inicialy a bibliographic search involving the concepts associated with the tematic in question so that it arranges the embasament theoric-scientific and a survey from facts through the country search, where it was applicable in the establishments of work's population with the auxiliary from a formulary answered by a personal interview. The analyses techniques through facts were: estatistic descritive and Kolmogorov-smirnov test.Among the results found, it was verified that the main reasons alleged by the hotels to ingress in the segment from the events were the alinement from the competitive company, the diversification in the options in the sense of occupy the establishments during the period of low season and answer to the demand of market. Investigated the profile from the events occured in the Natal hotels referring to the port, public origin , kinds of events and frequency from their realizations, as well as , the capacity from these establishments to attend this segment.It was noticed that in spite of the hotels agree that the events are important estrategies to combat the seasonality, the establishments still suffer with the flutuation, what can be justified from the moment that it's considered that the events also behave from seasonal manner, having more concentration in certain periods from the year. It was evaluated that the main advantage noticed by the realization from the hotels's events is the utilization from alimentation and drinking services, surpassing the advantage from elevation of taxes occupation from the apartments

Estratégia pública de gestão ambiental :uma contribuição para a realização de eventos públicos

The present study is included in the environmental international theme, approaching the search for the environmental conformity in public events. It describes the main environmental impacts, objects of the study Sound Disturbances, implications concerning the increase in the Volume of Traffic and in the volume of Solid Residues generated in the surroundings of the event. The methodology used consists of the report of the case study of the festivity called Carnatal, held in Natal/RN, in December of 2001. As a work method, it was used a quantitative evaluation of the sound intensity level, according to the effective legislation, an electronic count of volume of traffic and an evaluation of the productive performance of the means of production of public urban sanitation company used in the event. The results pinpoint the recognition of the impacts generated by the event and the proposition of a Program of Environmental Management, aiming at, in addition to the establishment of the instruments and goals for the mitigation of the impacts, defining the role of the social actors in the search for the environmental conformity of festivities

Letramento no trânsito: eventos e práticas na formação de condutores de veículos

In the contemporary society, the language is presented in all social spaces and assumes many different purposes in order to meet the needs that emerge from each of these sphere. In traffic, this reality is not different. To guide vehicles, it is necessary to know, by means of reading artifacts, what the legislation establishes in what concerns the way to act in this domain. Thus, this works aims at describing the practices of literacy held in events of driver trainings and know the expectations generated by drivers/learners from this training. In theoretical terms, it anchors in Literacy Studies, comprehended here as social practices (BARTON; HAMILTON, 1998; KLEIMAN, 1995, 2008; MORTATTI, 2004; STREET, 1984; OLIVEIRA, 2008, 2010; ROJO, 2009; PAZ, 2008). Genre Theory (BRONCKART, 2004, 1999; OLIVEIRA, 2010) and in your multimodal instance (KRESS; VAN LEEUWEN, 1996; DIONÍSIO, 2006). In terms of methodology, it follows the bias of qualitative research, because of its ethnographic nature (BOGDAN; BIKLEN, 1994; MINAYO, 2010; CANÇADO, 1994; CHIZZOTTI, 2005). The research corpus was generated by reading the Brazilian Traffic Code, by observing the literacy events held in Drivers Training Centers of Natal, analysis of course books used in these events, plus questionnaires with open and closed questions and semistructured interviews. The collaborators are constituted of drivers in training, and instructors who work in this field. The analyses show significant contributions regarding the placement more committed of future drivers with the welfare and safety of those who use the public roads, from the practice or reading done during the traffic training. The contribution of this work lies in the possibility to expand the discussion about the language practice uses regarding the training for the traffic, more specifically, the training of drivers of vehicles

As contribuições relativas ao uso de eventos/fóruns para constituição de comunidades de práticas e expressão da inteligência coletiva: o caso do Bibliocontas

Reflete sobre as Comunidades de Prática (CoPs), na perspectiva do conceito de Inteligência Coletiva de Pierre Lèvy. Descreve o ponto de vista de Lèvy, procurando estabelecer um diálogo como conceito de CoPs, criado por Etienne Wenger. Aponta os elementos encontrados nos fóruns virtuais e presenciais realizados pelo do Grupo Bibliocontas, (grupo formado por profissionais da informação que atuam nos Tribunais de Contas brasileiros), que podem contribuir para constituição de uma comunidade de prática. Verifica que os eventos/fóruns são canais integradores para efetivação de uma comunidade de prática, cujo resultado propicia a transformação das pessoas, a formação de identidades e a negociação de significados do fazer profissional. Observa que a construção coletiva de conhecimentos tem sido materializada na forma de diretrizes e ações, que foram ou estão para serem concretizadas pelas instituições dos participantes do grupo em questão, além do resultado da análise dos dados quantitativos, que indica um crescimento constante de troca de mensagens em ambiente virtual e aumento do número de participantes no grupo.