Elementos para pensar as tecnologias da informação na era da globalização

O trabalho aborda a questão que na contemporaneidade, a base material que constitui a comunicação está mudando profundamente com o desenvolvimento das tecnologias da informação. O trabalho ainda aborda o questionamento se há uma nova forma de reflexão sobre a comunicação em tempos de globalização que supere as análises dualistas. Para um exame dessas questões foram escolhidos textos de Pierre Lévy, Lucien Sfez e Manuel Castells, autores que, de certa forma, sintetizam tipos mais freqüentes de análises sobre a revolução tecnológica. Como os argumentos de cada um desses autores confrontam-se ou remetem aos tempos dos apocalípticos e integrados, eles pautarão a discussão neste artigo

O futuro do rádio no cenário da convergência frente às incertezas quanto aos modelos de transmissão digital

O presente artigo discute o futuro do rádio frente ao crescente processo de convergência entre sistemas de comunicação e tecnologias da informação e redes integradas de alta capacidade que carregam informação em formato digital e a emergência de diversos dispositivos e plataformas para se ouvir áudio. Em questão está o paradoxo entre a integração do meio a Internet e plataformas digitais e o lento processo de migração para o sistema de transmissão digital registrado em boa parte do mundo. Por meio de análise comparativa do processo de digitalização nos EUA, Europa e Brasil, conclui-se que o impasse está relacionado a características tecnológicas do sistemas disponíveis que dificultam sua adaptação ao modelo de radiodifusão, ao marco regulatório e as regras de mercado em cada país. _________________________________________________________________________________________________________________ RESUMENEste artículo discute el futuro de la radio ante el creciente proceso de convergencia de comunicación y tecnologías de la información, redes integradas que llevan la información de alta capacidad en formato digital y la aparición de múltiples dispositivos y plataformas para escuchar el audio. Se trata de la paradoja de la integración a través de la Internet y plataformas digitales y lento? proceso de migración a la transmisión digital en gran parte del mundo. A través del análisis comparativo del proceso de digitalización en los EE.UU, Europa y Brasil, se llega a la conclusión de que el estancamiento se relaciona con las características tecnológicas de los sistemas disponibles que hacen difícil adaptarse al modelo de la radiodifusión, el marco normativo y las reglas del mercado en cada país. _________________________________________________________________________________________________________________ ABSTRACTThis article discusses the future of radio with the increasing process convergence of communication and information technologies and integrated networks that carry high-capacity information in digital format and the emergence of multiple devices and platforms to listen to audio. At issue is the paradox of integration through the Internet and digital platforms and slow process of migration to digital transmission recorded in much of the world. Through comparative analysis of the scanning process in the U.S, Europe and Brazil, concluded that the impasse is related to technological characteristics of the systems available that make it difficult to adapt the model of broadcasting, the regulatory framework and market rules in each country

New insights into Mt. Vesuvius hydrothermal system and its dynamic based on a critical review of seismic tomography and geochemical features

The seismic velocity and attenuation tomography images, calculated inverting respectively P-wave travel times and amplitude spectra of local VT quakes at Mt. Vesuvius have been reviewed and graphically represented using a new software recently developed using Mathematica8TM. The 3-D plots of the interpolated velocity and attenuation fields obtained through this software evidence low-velocity volumes associated with high attenuation anomalies in the depth range from about 1 km to 3 km below the sea level. The heterogeneity in the distribution of the velocity and attenuation values increases in the volume centred around the crater axis and laterally extended about 4 km, where the geochemical interpretation of the data from fumarole emissions reveals the presence of a hydrothermal system with temperatures as high as 400-450°C roughly in the same depth range (1.5 km to 4 km). The zone where the hydrothermal system is space-confined possibly hosted the residual magma erupted by Mt. Vesuvius during the recent eruptions, and is the site where most of the seismic energy release has occurred since the last 1944 eruption

End-to-end approach to flexible and sustainable commercial spaceflight initiatives: Evaluation of operational scenarios, safety aspects, spaceports and associated economic elements

Multiple initiatives are going on today, aimed at developing new technologies for commercial exploitation of space. The potential benefits of widening up the access to space to a broader users community affect different applications ranging from space tourism to microgravity experimentation to astronauts and pilots training; moreover, in the new space economy users communities may include parties that do not traditionally operate in the space business but can take advantage of microgravity exploitation as an opportunity to carry out experimental activities with potential more significant outcome. The present paper initially approaches commercial access to space by evaluating different mission concepts, technologies and platforms such as suborbital spaceflight, orbital spaceflight, air launch and deployment of small satellites. In order to select the most promising alternative, trade off methodologies, making use of safety, cost and complexity as figures of merit are suggested for the specific case of the suborbital flight. Moreover, the paper describes the outcome of simplified mission simulations, encompassing both suborbital vehicle as well as satellite air launch trajectories predictions. The trajectories simulations can also provide useful inputs to the vehicle design and performance analysis and are instrumental to planning air space operations after lift off from the launch site, as well as to assess logistics and operational aspects. Thus, simulations of really operating environment provide the link to the Spaceport selection process aiming at defining an adequate operating base and a set of proper ground infrastructures that efficiently support in integrated fashion the execution of the planned activities with the selected platforms. An integrated end-to-end approach is also described, that basing upon the specific users' needs identifies the appropriate platform and delivers the associated service matching the relevant goals. The paper finally discusses some economic and organizational aspects for developing a sustainable commercial spaceflight initiative. Ideas for next activities are drawn too, mainly focusing on trajectory validation simulation with real data coming from the initial test campaigns

The Application of Quality of Life in Services for Persons with Intellectual and Developmental Disabilities: Lines of intervention in Spain and Italy

The concept of quality of life (QOL) has become a measurable construct of great value to all people, including people with intellectual and developmental disabilities (IDD). In particular, the field of IDD is currently experiencing a paradigm shift related to beliefs, assumptions, policies, and practices concerning people with disabilities and their families and the place and role they play in society. This article starts by reconstructing the state of the art of the application of QOL in Social Services, reconstructing its research developments, operational declinations and influences in social policies in Spain and Italy

Prognostic role of amenorrhea induced by adjuvant chemotherapy in premenopausal patients with early breast cancer.

The prognostic role of drug-induced amenorrhea (DIA) was restrospectively evaluated in 221 out of 254 consecutive premenopausal patients treated with adjuvant CMF or a CMF-containing regimen; 33 patients were eliminated because of lack of menstrual data. All patients had metastatic axillary nodes; drug regimens were: CMF x 9 courses +/- Tamoxifen (TM) and CMF x 6 courses; median age was 43 (range 26-54). Premenopausal status was defined as last normal menses within the 6 weeks preceding initiation of chemotherapy: DIA as cessation of menses for at least 3 months not later than 3 months from the end of chemotherapy. DIA occurred in 166,221 (75.1%) patients and was strictly related to the age of the patients; also, the older the patients the shorter the time required to develop DIA. At median follow up of 69 months, Mantel-Byar analysis showed a longer disease free survival (DFS) for patients who developed DIA as compared with non amenorrheic women (P less than 0.001). DIA prognostic value was independent of age, number of involved nodes, tumour size and number of CMF cycles, as assessed by the Cox model (RH 0.43, 95% C.I. 0.24-0.77), in which DIA was entered as a time dependent covariate

Mixing enhancement induced by viscoelastic micromotors in microfluidic platforms

Fine manipulation of fluid flows at the microscale has a tremendous impact on mass transport phenomena of chemical and biological processes inside microfluidic platforms. Fluid mixing in the laminar flow regime at low Reynolds number is poorly effective due to the inherently slow diffusive mechanism. As a strategy to enhance mixing and prompt mass transport, here, we focus on polyelectrolyte multilayer capsules (PMCs), embodying a catalytic polyoxometalate, as microobjects to create elastic turbulence and as micromotors to generate chaotic flows by fuel-fed propulsions. The effects of the elastic turbolence and of the artificial propulsion on some basic flow parameters, such as pressure and volumetric flow rate, are studied by a microfluidic set-up including pressure and flow sensors. Numerical-handling and physical models of the experimental data are presented and discussed to explain the measured dependence of the pressure drop on the flow rate in presence of the PMCs. As a practical outcome of the study, a strong decrease of the mixing time in a serpentine microreactor is demonstrated. Unlike our previous reports dealing with capillarity flow studies, the present paper relies on hydrodynamic pumping experiments, that allow us to both develop a theoretical model for the understanding of the involved phenomena and demonstrate a successful microfluidic mixing application. All of this is relevant in the perspective of developing microobject-based methods to overcome microscale processes purely dominated by diffusion with potential improvements of mass trasport in microfluidic platforms. \ua9 2019 Elsevier B.V

MÍDIAS NA EDUCAÇÃO E O PROCESSO DE MEDIAÇÃO DO EDUCADOR NA FORMAÇÃO ACADÊMICA

Este artigo tem como objetivo investigar o papel do educador como possível mediador no processo de construção do conhecimento por meio da discussão sobre o papel das mídias no processo formativo acadêmico.Utilizou-se como investigação a pesquisa bibliográfica norteada pelos referenciais teóricos e análises de entrevistas. Ao final das análises e das reflexões teóricas, compreende-se que a mediação só é possível por meio de uma troca enfim, da dialogicidade

Immune senescence and immune activation in elderly colorectal cancer patients

In our previous study, we found that low thymic output and short telomere length were associated with a higher risk of tumor in elderly cancer patients. Here, we aimed to examine in depth the impact of immunological and biological senescence and immune activation on disease outcome in elderly patients with colorectal cancer (CRC).Peripheral blood samples from 81 CRC patients were studied for immune activation, immune senescence and recent thymic emigrant (RTE) CD4 and CD8 cells by flow cytometry. T-cell receptor rearrangement excision circle (TREC) levels and telomere lengths were measured by real-time PCR. Plasma levels of microbial translocation markers, LPS and sCD14, were quantified by ELISA. While TREC levels and telomere length were not prognostic of disease outcome, high percentages of immune senescent and immune activated CD8 cells were associated with a higher risk of a negative event (relapse, progression, or death) in all studied patients and disease relapse in I-Ill staged patients. Levels of sCD14 and LPS were higher in patients who will experience a negative event than in patients who will not. In conclusion, in elderly CRC patients higher immunological senescence and immune activation negatively impact the disease outcome; how these characteristics influence the antineoplastic treatments remains to be investigated