1,504 research outputs found
Bate-Papo FGV: Como combater o aumento das campanhas de desinformação no mundo
No full textAs redes sociais permitiram um importante aumento da circulação de informações e também de desinformações, com importantes reflexos na política e no cotidiano. O combate às Fake News só será possível com o apoio das grandes plataformas e um grande esforço público. Esse movimento será suficiente para restabelecer a credibilidade da disseminação de informações via redes sociais? Confira o #BatePapoFGV com o Luca Belli, professor da FGV Direito Rio
The future of the IGF: mandate renewal?
No full textThis week, internet governance debates will centre on the UN General Assembly, which is due to make a decision about the future of the Internet Governance Forum (IGF); specifically, whether or not to renew its mandate. In advance of that decision, Luca Belli, Researcher at the Center for Technology and Society (CTS) of Fundação Getulio Vargas Law School, Rio de Janeiro, outlines the value of the IGF and why he believes that its mandate should be renewed. This is the second blog to be published by the Media Policy Project which considers the issue of the IGF’s mandate
New routes to the synthesis of chloro-carbonyls of palladium(II) and platinum(II)
No full textABSTRACT [Pt(CO)(x)](n) (x similar to 2), the already described species obtained by the reaction of platinum(0) olefin complexes with carbon monoxide, reacts promptly at room temperature with SO2Cl2 under CO affording cis-PtCl2(CO)(2). [Pd-2(CO)(y)](n) (y similar to 1), obtained by Pd(dba)(2) and CO at room temperature, reacts in the same conditions yielding Pd2Cl4(CO)(2). Similarly, although more slowly, finely divided platinum and palladium, in the form of metal blacks, react with SO2Cl2 and CO at room temperature producing again cis-PtCl2(CO)(2) and Pd2Cl4(CO)(2), respectively. In the absence of CO no reaction is observed within 4 weeks
Not Neutrality but ‘Open Internet’ à l’Européenne
No full textOn 27 October, the European Parliament approved a new regulation which will abolish roaming charges across the EU. However, in the same regulation, there was also discussion of the more technical question of net neutrality, a thorny issue which centres on the principle of equal treatment for all web traffic. In this piece, Chris Marsden, Professor of Internet and Media Law at the University of Sussex, and Luca Belli, Researcher at the Center for Technology and Society, explain the important impact of the new Regulation on web users across the EU, and ask what challenges we may face in the future as a result
Inteligência artificial: abrir a caixa preta dos algoritmos é necessário
No full textApresentado na 32ª edição do Seminário Internacional da ABDTIC, organizado pela Associação Brasileira de Direito das Tecnologias da Informação e das Comunicações, nos dias 10 e 11 de dezembro, em São Paulo.Para o professor da FGV/RJ Luca Belli, a Inteligência Artificial poderia seguir preceitos éticos com base na conduta e comportamento, da mesma forma como humanos. Ainda assim, lembra que os algoritmos que compõem a "caixa preta" da máquina podem ter viés, citando o "algoritmo do Facebook não determina só as notícias que lemos, mas em quem vamos votar nas próximas eleições". Por isso, pede por mecanismos de transparência para instruir a população. O especialista participou da 32ª edição do Seminário Internacional da ABDTIC, organizado pela Associação Brasileira de Direito das Tecnologias da Informação e das Comunicações, nos dias 10 e 11 de dezembro, em São Paulo
THORIN: an Efficient Module for Federated Access and Threat Mitigation in Big Stream Cloud Architectures
No full textIn order to make cloud services attractive for several IT organizations, it is necessary to provide access control and to implement safe and reliable mechanisms of Identity and Access Management (IAM). In this work, we focus on security issues and challenges in the design and implementation of cloud architectures and, in particular, for the management of Big Stream applications in Internet of Things (IoT) scenarios. The proposed work introduces a new set of modules allowing a federated access control policy for cloud users. An analysis of possible threats and attacks against the proposed Big Stream platform is presented, investigating the system performance in terms of detection and elimination of malicious nodes. In particular, we propose a new module, denoted as Traffic Handler Orchestrator & Rapid Intervention (THORIN), which is very efficient in counteracting botnet-based threats
Optimization of post-exercise recovery beverages’ composition
No full textFluid intake and adequate hydration are essential and critical during and after training sessions and competition events. Reductions in body water content will prejudice performance with exercise performance significantly impaired when 2% or more of body weight is lost through sweat [1-3]. Guidelines states that in the post exercise (within 30 minutes to 1 hour after the end of the physical exercise), effective rehydration requires the intake of a volume of fluid equal to, at least, the 150% of the difference between body weight before and after the training [4] but a lack is still present regarding specific guidelines related to beverage formulations, strategies and volumes.
Indeed, in addition to water, sweat contains variable amounts of sodium, with lesser amounts of potassium, calcium, and magnesium so it is important that athletes can benefit from intake of an appropriate amount of a well-formulated drink [5-9].
Our prevoius studies underlined the potential role of skimmed milk as post recovery drink possibly linked to its specific characteristics [10-12]. In particular, milk has naturally high concentrations of electrolytes, that should aid in fluid recovery following exercise [4, 13].
Moreover, it contains casein and whey proteins in a ratio of 3:1 which provides for slower digestion and absorption of these proteins resulting in sustained elevations of blood amino acid concentrations.
In this regard, the aim of this study was to further evaluate the role of milk as post-recovery beverage. In particular, skimmed milk was tested in different volumes (no diluted skimmed milk, skimmed milk diluted 1:2 and 1:3) in order to better evaluate its role and to optimize volume. Moreover, specific nutrients (i.e. Casein, Sodium) and their possible combinations (Casein + Sodium, Whey proteins + Sodium) were taken into account in different concentrations to investigate possible role of specific nutrients.
30 athletes, both male and female, aged between 19 and 47, took part to the study. Each strategy was tested for one week with an intake equal to 500ml of the specific drink with the addiction of an amount of water equal to the volume needed to reach the 150% of loss body weight during the exercise.
A specific questionnaire was performed to ask about type of activity performed, the intensity of the activity, the urine colour, the thirst sensation after waking up in the morning; eventual cramps. Anthropometric measurement and Bioimpedence Analysis (both mono-frequency and multi-frequency) were performed to assess body composition and hydration in term of total body water, intra-cellular water and extra-cellular water.
Following guidelines indications, through the use of 150% of water intake in the post exercise, a variability among subjects were observed with cases also of worsening of hydration status underlining the importance of beverage characteristics as several elements might affect fluid balance: the macronutrient content, the electrolyte (i.e. sodium and potassium) [5-9].
Among the different strategies tested, skimmed milk resulted again the best one, able both to improve total body water in terms of intra-cellular water and body composition more than single milk nutrients. This underlines the importance of further investigate milk as post-exercise recovery beverage in terms not only of nutrients content but also nutrients synergism.
Even if data obtained by this study are limited by the restricted number of athletes, obtained results can be considered a step ahead to better evaluate the role of milk as recovery beverages, to define its applicability and to study new hydration protocols in order to improve the present knowledge on athlete’s hydration and recovery.
References
[1] Maughan RJ. Investigating the associations between hydration and exercise performance: methodology and limitations. Nutr Rev. 2012;70(suppl_2):S128-S131.
[2] Maughan RJ, Shirreffs SM, Leiper JB. Errors in the estimation of hydration status from changes in body mass. J Sports Sci. 2007;25(7):797-804.
[3] Goulet ED, et al. Pre-exercise hyperhydration delays dehydration and improves endurance capacity during 2 h of cycling in a temperate climate. J Physiol Anthropol. 2008;27(5):263-71.
[4] Shirreffs SM, Watson P, Maughan RJ. Milk as an effective post-exercise rehydration drink. Br J Nutr. 2007; 98(1):173-180.
[5] Thomas DT, Erdman KA, Burke LM. Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance. J Acad Nutr Diet. 2016;116(3):501-528.
[6] Brancaccio P, et al. Supplementation of Acqua Lete(R) (Bicarbonate Calcic Mineral Water) improves hydration status in athletes after short term anaerobic exercise. J Int Soc Sports Nutr. 2012; 9(1):35.
[7] Maughan RJ, et al. A randomized trial to assess the potential of different beverages to affect hydration status: development of a beverage hydration index. Am J Clin Nutr. 2016;103(3):717-23.
[8] Kalman DS, et al. Comparison of coconut water and a carbohydrate-electrolyte sport drink on measures of hydration and physical performance in exercise-trained men. J Int Soc Sports Nutr. 2012;9(1):1.
[9] Oliver S, et al. Development of a hydration index: a randomized trial to assess the potential of different beverages to affect hydration status. Nutr Hosp. 2015;32 Suppl 2:10264.
[10] Vici G, Albertini F, Quintavalle A, Belli L, Polzonetti V. Milk as recovery drink after exercise: a case study. Alimenti Funzionali e Nutraceutici per la Salute. Camerino, 28th June 2016
[11] Vici G, Camilletti D, Cesanelli L, Belli L, Polzonetti V. Effects of different nutritional strategies in post exercise recovery. Cibo e Nutraceutici: direzione salute. Camerino, 10th July 2018
[12] Vici G, Camilletti D, Mozzoni A, Cesanelli L, Belli L, Polzonetti V. Effects of specific re-hydration protocols after exercise in non-elite and elite athletes. 3rd Sport Nutrition International Conference. Bologna, 30th November 2018
[13] Roy BD. Milk: the new sports drink? A Review. J Int Soc Sports Nutr. 2008;5:15
Supplementary_Material – Supplemental material for Minimizing the surgical approach for a rare disease: transanal endoscopic microsurgery for rectal schwannoma
No full textSupplemental material, Supplementary_Material for Minimizing the surgical approach for a rare disease: transanal endoscopic microsurgery for rectal schwannoma by Marcello Guaglio, Filiberto Belli, Alessandro Cesa Bianchi, Luca Sorrentino and Luigi Battaglia in Tumori Journal</p
Bent Dinuclear Platinum(II) Halo-Bridged Carbonyl Complexes
No full textCrystals of trans-Pt2(μ-X)2X2(CO)2 (X = Br, I) have been grown and their molecular and crystalline structures have been solved by X-ray diffraction methods. In both cases the dinuclear molecules are bent, with a bending angle of 164.6° and 156.5° for the bromide and the iodide, respectively. While the structure of the bromo-derivative is reported here for the first time, a modification of trans-Pt2(μ-I)2I2(CO)2 with planar centrosymmetric molecules is known. This appears to be a rare case of a platinum(II) halo-bridged derivative structurally characterized in both bent and planar forms
Smart City as an Urban Intelligent Digital System: The Case of Parma
No full textA smart city is an intelligent digital system that implements an effective smart urban environment able to integrate information from heterogeneous data sources and to provide efficient high-level services to citizens and municipal authorities
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