Using stochastic volatility models to analyse weekly ozone averages in Mexico City

In this paper we make use of some stochastic volatility models to analyse the behaviour of a weekly ozone average measurements series. The models considered here have been used previously in problems related to financial time series. Two models are considered and their parameters are estimated using a Bayesian approach based on Markov chain Monte Carlo (MCMC) methods. Both models are applied to the data provided by the monitoring network of the Metropolitan Area of Mexico City. The selection of the best model for that specific data set is performed using the Deviance Information Criterion and the Conditional Predictive Ordinate method.

Popular history magazines and history education

This paper argues that popular history magazines may be a welcome complement toother forms of historical media in history teaching. By outlining a theoretical framework thatcaptures uses of history, the paper analyses popular history magazine articles from five Europeancountries all dealing with the outbreak of World War I. The study finds that while the studiedarticles provide a rather heterogeneous view of the causes of the Great War, they can be used todiscuss and analyse the importance of perspective in history, thus offering an opportunity tofurther a more disciplinary historical understanding.

Meios de comunicação como construtores de uma imagem pública: Juscelino Kubitschek através das revistas 'Manchete' e 'O Cruzeiro'

O presente trabalho se propõe a analisar a construção da imagem pública do ex-presidente do Brasil – Juscelino Kubitschek de Oliveira -, através das fotorreportagens de duas revistas ilustradas semanais de grande relevância no período do seu governo: 'Manchete' e 'O Cruzeiro'. São abordadas as transformações sofridas pela imprensa nos anos 1950, assim como questões políticas, econômicas e sociais do período. A análise objetiva perceber o papel dos meios de comunicação na 'fabricação' da memória não só de Juscelino como também do Brasil daqueles anos.

A theory of weekly specials

Multiproduct retailers facing similar costs and serving the same public commonly announce different weekly specials. These promotional prices also seem to evolve randomly over the weeks. Here, weekly specials are viewed as the strategic outcome of an oligopolistic price competition among multiproduct retail stores facing nonconvex costs. Existence of an equilibrium in mixed strategies is proven. ldentical stores serving the same public will never charge the same price vector with probability one (cross-store price dispersion). Mixed strategies can generate random price dispersion over time in the repeated version of the mode!.

HISTOCHEMICAL RESPONSES of RATS EXERCISED IN TWO WEEKLY FREQUENCIES and INGESTING STANDARD OR HYPERCALORIC DIET

This study investigated if overfed rats present morphological and histochemical muscle adaptation similar to normally fed, both submitted to two different weekly frequencies of training. Thirty male Wistar rats were fed either with standard chow (SCO) or with hypercaloric diet (HCO). They were subdivided into six subgroups: sedentary (SCO and HCO), trained twice/week (SC2 and HC2) and trained five times/week (SC5 and HC5). The trained groups swam 60 min/day, during 10 weeks. Twenty four hours after the last training, samples of Gastrocnemius were excised and stained with HE, NADH-TR and m-ATPase, and the capillary density was calculated. Total heart mass (HM) and the mass of atrium (AM), left (LV) and right (RV) ventricles were excised and weighted. The comparisons were made by ANOVA and by Covariance analysis, adjusting the variables by body weight. The results showed that the HCO achieved higher BM, however, absolute HM did not differ post training. Irrespective of the diet, rats that were trained twice a week presented significantly greater increase in the AM. In general, the SC5 and HC5 groups showed higher HM, LV, RV, proportion of oxidative fibres and capillary density, compared to the sedentary and twice week trained groups. A higher proportion of injuries (splitting) was noted in the HC2 and HC5 compared to SC2 and SC5. These results indicate that the frequency of training influenced the skeletal and heart adaptation and larger changes were observed in the 5x/week group, which ingested the standard diet. The 5x/week training groups also presented large amount of muscle fibres damage.

Weekly Self-Scheduling, Forward Contracting, and Offering Strategy for a Producer

Within a weekly market horizon, this paper considers a power producer that sells its energy both in the pool and through weekly forward contracts. The paper provides a methodology that allows the producer to derive the self-scheduling of its production units, to select weekly forward contracts, and to obtain the offering strategy for Monday's pool. The proposed technique is based on stochastic programming and allows the producer to maximize its expected profit while controlling the risk of profit variability. A comprehensive case study is used to illustrate the characteristics of the proposed methodology. Appropriate conclusions are finally drawn.

As crônicas de Bilac nas revistas ilustradas A cigarra (1895) e A Bruxa (1896-1897)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A Semana: periódico literário

A vinda da família real para o Brasil, em 1808, trouxe grandes mudanças e entre elas a primeira manifestação periódica o Correio Brasiliense, editado em Londres. No início do século XX, sobretudo, com a Semana de Arte Moderna em 1922, surgem revistas como: Klaxon, Estética, Festa e outras. A partir delas editam-se outras que constituíram importantes documentos da sociedade brasileira e registram a nova tendência do público leitor. O Pará não ficou ausente desses acontecimentos e teve a Imprensa como seu principal veículo de divulgação. Algumas revistas e alguns jornais surgiram nessa época na capital do Estado, entre as quais se destacou a revista A Semana, que circulou por vinte e cinco anos. Esse semanário mantinha correspondência com outras regiões do Brasil: São Paulo, Rio de Janeiro, Recife, Maranhão. Nessas regiões havia colaboradores da revista, o que permitia a troca de informações do que acontecia no mundo literário e no mundo cultural. Dos periódicos compilados foram selecionados quatro exemplares do ano de 1939 para serem estudados, neste trabalho. Neles foram feitos levantamentos da capa, das publicações literárias, do gênero a que essas produções pertenciam e de seus respectivos autores. Pelo quadro-resumo feito dessas edições, percebeu-se que os editores procuravam seguir um padrão divulgando textos de cunho literário, como contos, poemas, trechos de romances, ensaios, entre outros. Em algumas dessas produções ficaram evidentes que nem todas absorveram a nova tendência estética que veio com A Semana de Arte Moderna, pois havia escritores que oscilavam entre as estéticas Romântica, Simbolista e Parnasiana. Por outro lado existiam aqueles que se destacavam, incorporando esse novo tempo literário. Em meio a essas produções despontava a figura feminina, num lugar de destaque, que além de ilustrarem a capa do periódico ainda apareciam nas páginas subseqüentes. Todas essas informações divulgadas no periódico deram mais credibilidade à Revista e permitiu que a Literatura Paraense fizesse parte desse novo momento da Literatura Brasileira.

Petroleum products biodegradation profile similarity evaluated by F test comparison of weekly CO2 production

Strategies applied to bioremediation contaminated environments are necessary to identify limitations towards biodegradation and to predict remediation performance and thereby rule out technologies that may be inappropriate for the clean-up of the substances of concern. Respirometry applied to bioremediation offers a series of advantages for obtaining CO2 production data when compared to other procedures. It was possible to determinate information regarding the atmosphere's CO2 concentration inside a respirometer containing petroleum products. Afterwards, the CO2 data obtained underwent an in depth statistical analysis by F test. There are some noticeable biodegradation similarity among some substances, such as weathered motor oil and gasoline. Such data provides reliability when revealing important information about how the biodegradation processes happens in those residual oils.

Os recursos publicitários como ferramenta de valorização do fazer-jornalístico: um estudo das capas da Revista Veja

This study focuses on an analysis of the convergence of Journalism and Publicity on the covers of the magazine. This paper aims to clarify how the dynamics of that relationship, understanding that in contemporary society, both Journalism and Publicity to perform the same function-to inform, differing only in the objective-journalism sells news, Publicity sells dream. The magazine Veja was chosen for this study because its importance and scope in publishing. Inspired by Time magazine, founded in 1922 by Henry Luce, Veja was the 2nd review of gender information in Brazil. Today a record run of more than 1 million copies, occupying the 3rd position in the ranking of news magazines sold over the world and the largest weekly magazine of the U.S. Among the media, the magazine is the most identified with the publicity, because as disseminator of advertising, the magazine has the advantage of being able to achieve precisely the widest range of public and the possibility of dealing with many different subjects; In addition, the number of people who have contact with the advertising is much greater because, on average, four people read each issue and is also common that the same reader review the revised more than once, which helps in setting the message advertising. This affinity between magazine and publicity is in its essence as both are prepared for the market, seek to promote, show themselves to be bought. Accordingly, we intend to find out how media discourse of Veja and publicity, approach in the writing of magazine covers

Weekly Problems Scales: Instruments for Sexually Abused Youth and Their Nonoffending Parents in Treatment

This study’s purpose was to determine if efficient measures could be created to assess multiple problematic behaviors identified in youth who were sexually abused and in treatment. Because of the lack of easily administered brief instruments that assess multiple domains of interest in this population, complementary parent and child assessment measures were developed. The Weekly Problems Scale–Child Version (WPSC) and the Weekly Problems Scale–Parent Version (WPS-P) were created to monitor the weekly progress of the child and family in treatment and focus specifically on common areas of difficulties in this population. Exploratory factor analysis was conducted to assist in identifying the number of underlying dimensions in the scales. Results indicate that the WPS-C and WPS-P demonstrate adequate internal consistency, temporal stability, and construct validity. The WPS-C and WPSP display significant promise as research and clinical assessment tools for use with youth who are sexually abused and their nonoffending parents in treatment.

Exercise training program based on minimum weekly frequencies: effects on blood pressure and physical fitness in elderly hypertensive patients

Background: Exercise training (ET) can reduce blood pressure (BP) and prevent functional disability. However, the effects of low volumes of training have been poorly studied, especially in elderly hypertensive patients. Objectives: To investigate the effects of a multi-component ET program (aerobic training, strength, flexibility, and balance) on BP, physical fitness, and functional ability of elderly hypertensive patients. Methods: Thirty-six elderly hypertensive patients with optimal clinical treatment underwent a multi-component ET program: two 60-minute sessions a week for 12 weeks at a Basic Health Unit. Results: Compared to pre-training values, systolic and diastolic BP were reduced by 3.6% and 1.2%, respectively (p < 0.001), body mass index was reduced by 1.1% (p < 0.001), and peripheral blood glucose was reduced by 2.5% (p= 0.002). There were improvements in all physical fitness domains: muscle strength (chair-stand test and elbow flexor test; p < 0.001), static balance test (unipedal stance test; p < 0.029), aerobic capacity (stationary gait test; p < 0.001), except for flexibility (sit and reach test). Moreover, there was a reduction in the time required to perform two functional ability tests: "put on sock" and "sit down, stand up, and move around the house" (p < 0.001). Conclusions: Lower volumes of ET improved BP, metabolic parameters, and physical fitness and reflected in the functional ability of elderly hypertensive patients. Trial Registration RBR-2xgjh3.