Browsing by Author "Ribeiro, Carlos"
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- Breve reflexão sobre Teatro em tempo de pandemia: ensino e prática cénicaPublication . Ribeiro, CarlosParecem acontecer as formas mais díspares de resposta à violência do confinamento, decidido pelo estado português, como resposta à pandemia provocada pelo coronavírus, Covid-19. A festividade compulsiva, por vezes histérica, a vivência lutuosa e depressiva, por vezes expiação; o troar de argumentações num fervor opinativo, procurando explicar o inexplicável, e o abanão de certezas e convicções; a espera contida e atenta; a indiferença. Todas estas reações relevam de uma incidência traumática. Estes comportamentos, e mais haverá, expressam a dureza de um tempo. Isto reflete-se no teatro: no ensino do teatro, na formação de atores, bem como na prática cénica. Este esquisso retoma algumas notas reflexivas sobre estes assuntos.
- A cidade de FaustoPublication . Ribeiro, Carlos"A Cidade de Fausto", é uma peça de teatro que tem como ponto de partida o mito de Fausto. O desenvolvimento da peça centra-se em torno de uma meditação cénica sobre o saber viver em comunidade. A comunidade teatral, os actores e as personagens, servem esse objectivo de um micro-laboratório social, tragicómico, onde se ensaiam, estratégias de colaboração e convivência que passam pela multiplicidade de registos que espelham, por sua vez, a diversidade característica da Cidade. Esta Cidade plural encontra na poesia cénica, que esbate lirismo e ironia, o magma em que se refaz. Fausto torna-se pois sinónimo de um “simulado incêndio”, porventura imperdoável.
- EVIV: An end-to-end verifiable Internet voting systemPublication . Joaquim, Rui; Ferreira, Paulo; Ribeiro, CarlosTraditionally, a country's electoral system requires the voter to vote at a specific day and place, which conflicts with the mobility usually seen in modern live styles. Thus, the widespread of Internet (mobile) broadband access can be seen as an opportunity to deal with this mobility problem, i.e. the adoption of an Internet voting system can make the live of voter's much more convenient; however, a widespread Internet voting systems adoption relies on the ability to develop trustworthy systems, i.e. systems that are verifiable and preserve the voter's privacy. Building such a system is still an open research problem. Our contribution is a new Internet voting system: EVIV, a highly sound End-to-end Verifiable Internet Voting system, which offers full voter's mobility and preserves the voter's privacy from the vote casting PC even if the voter votes from a public PC, such as a PC at a cybercafe or at a public library. Additionally, EVIV has private vote verification mechanisms, in which the voter just has to perform a simple match of two small strings (4-5 alphanumeric characters), that detect and protect against vote manipulations both at the insecure vote client platform and at the election server side. (c) 2012 Elsevier Ltd. All rights reserved.
- Girela: reflexões sobre criação artística, formação e legislaçãoPublication . Cordeiro, Marta; Mendes, Conceição; Espada, José; Mendes, José Maria Vieira; Maia, Tomás; Buchinho, Emidio; Calixto, João; Nogueira, Mariana Sá; Saraiva, Catarina; Real, Sílvia; Ribeiro, CarlosGirela, Reflexões sobre Criação Artística, Formação e Legislação resulta de um projeto de investigação apoiado pela 2.ª edição do Concurso de Projetos de Investigação, Desenvolvimento, Inovação & Criação Artística financiados (IDI&CA). A investigação pretende estudar o panorama do ensino artístico no atual sistema de ensino superior, elegendo três vetores principais de análise: a) a reflexão em torno das questões conceptuais que unem produção artística, pedagogia e investigação (Testemunho); b) a capacidade sistemática de enquadrar, legitimar e operacionalizar o ensino superior artístico, traduzida em legislação (Legislação); c) a criação contemporânea (Projeto).
- Improving remote voting security with code votingPublication . Joaquim, Rui; Ribeiro, Carlos; Ferreira, PauloOne of the major problems that prevents the spread of elections with the possibility of remote voting over electronic networks, also called Internet Voting, is the use of unreliable client platforms, such as the voter's computer and the Internet infrastructure connecting it to the election server. A computer connected to the Internet is exposed to viruses, worms, Trojans, spyware, malware and other threats that can compromise the election's integrity. For instance, it is possible to write a virus that changes the voter's vote to a predetermined vote on election's day. Another possible attack is the creation of a fake election web site where the voter uses a malicious vote program on the web site that manipulates the voter's vote (phishing/pharming attack). Such attacks may not disturb the election protocol, therefore can remain undetected in the eyes of the election auditors. We propose the use of Code Voting to overcome insecurity of the client platform. Code Voting consists in creating a secure communication channel to communicate the voter's vote between the voter and a trusted component attached to the voter's computer. Consequently, no one controlling the voter's computer can change the his/her's vote. The trusted component can then process the vote according to a cryptographic voting protocol to enable cryptographic verification at the server's side.
- The Tagus River delta landslide, off Lisbon, Portugal. Implications for Marine geo-hazardsPublication . Terrinha, Pedro; Duarte, Henrique; Brito, Pedro; Noiva, João; Ribeiro, Carlos; Omira, Rachid; Baptista, Maria Ana Carvalho Viana; Miranda, Miguel; Magalhaes, Vitor; Roque, C.; Rosa, Marcos; Alves, Paulo; Teixeira, Francisco; Tagusdelta Cruise TeamThe stratigraphy of the Tagus river ebb-tidal delta off Lisbon (Portugal) is investigated using high resolution multichannel seismic reflection profiles with the purpose of searching for sedimentary or erosive features associated with landslides. The Tagus delta is sub-divided in two prograding seismic units of 17 ky to 13 ky and 13 ky to Present based on the calibration of seismic lines using gravity and box-cores in the Tagus pro-delta. We report the existence of a buried landslide with 11 km of length, 3.5 km of width and a maximum thickness of 20 m that accounted for the collapse of half of the upper unit of the Tagus river delta front in Holocene times. The non-collapsed half of the delta front contains extensive shallow gas of still unknown origin and nature. An estimated age of similar to 8 ky BP for the Tagus delta landslide is proposed based on stratigraphic correlation. The trigger mechanisms of the newly identified Tagus landslide are discussed as well as of the several landslides also found in the lower delta unit. These findings present a first step towards a future assessment of the susceptibility of the nearby coastal areas and the off-shore infrastructures to hazards related to such large collapses.