12 research outputs found
AlbMoRe Movie Reviews in Albanian
No full textAlbMoRe is a sentiment analysis corpus of movie reviews in Albanian, consisting of 800 records in CSV format. Each record includes a text review retrieved from IMDb and translated in Albanian by the author. It also contains a 0 negative) or 1 (positive) label added by the author. The corpus is fully balanced, consisting of 400 positive and 400 negative reviews about 67 movies of different genres. AlbMoRe corpus is released under CC-BY license (https://creativecommons.org/licenses/by/4.0/). If using the data, please cite the following paper: Çano Erion. AlbMoRe: A Corpus of Movie Reviews for Sentiment Analysis in Albanian. CoRR, abs/2306.08526, 2023. URL https://arxiv.org/abs/2306.08526
Secret Diplomacy as an Instrument for the Resolution of Contemporary Conflicts
No full textSecret diplomacy, as an important form of international relations conducted behind closed doors, is one of the most effective mechanisms for resolving complex conflicts in situations where public and formal negotiation channels fail to deliver results. Its main advantage lies in the ability to free actors from external pressure, rigid political positions, and public scrutiny, thereby creating space for a more honest exchange of views and the exploration of compromise solutions. Through discretion and flexibility, secret diplomacy enables the building of trust between conflicting parties and the testing of options that would otherwise face resistance in a public context. Historical examples confirm its value: the secret negotiations that led to the 1993 Oslo Accords between Israel and the Palestine Liberation Organization, or the secret communication channels during the 1962 Cuban Missile Crisis between the United States and the Soviet Union. However, despite these advantages, secret diplomacy also carries certain risks. The lack of transparency can result in undemocratic decision-making, loss of legitimacy, and even the contestation of agreements reached in later stages of the peace process. In the modern international environment—characterized by a multiplicity of actors and spheres of interest—secret diplomacy remains relevant and often indispensable. Nevertheless, its success depends on the ability to translate results achieved in secrecy into formal and legitimate agreements, thus ensuring long-term stability and sustainability. Combined with public and institutional diplomacy, secret diplomacy is emerging as a key instrument for the prevention, management, and resolution of conflicts in the 21st century
Towards Combined Task and Motion Planning for Autonomous Underwater Vehicles
No full textDegree Awarded: Ph.D. Electrical Engineering and Computer Science. The Catholic University of AmericaIn oceanic research and development, autonomous underwater vehicles (AUVs) provide scientists with the ability to augment expensive manned operations at a lower cost while simultaneously exploring regions that were previously inaccessible to scientists. While the cost of these AUVs is often nontrivial, the ability to autonomously sample data from varying regions over extended time periods removes the necessity of human operations which require much higher overhead costs. Scientists are now leveraging the unique abilities of AUVs to explore new environments, scientists are now starting to use AUVs to perform sophisticated missions in deep ocean environments, under the polar ice caps, or throughout dangerous minefields in the littoral. The success of these missions, however, depends on the ability of the AUV to autonomously perform complex tasks.Toward this goal, this dissertation seeks to enhance the capabilities of AUVs so that they are able to autonomously plan the high-level actions and the low-level motions needed to accomplish complex missions. A framework is developed which makes it possible to specify such missions in a structured language resembling English, and it automatically plans the actions and motions that the AUV needs to execute in order to accomplish the mission. The mission-specification language is grounded in well-established logical formalisms such as Regular Languages and Linear Temporal Logic. The inherent structure of the mission-specification language makes it possible to construct sophisticated mission such as exploring unknown areas, searching for objects of interest, or collecting data. In doing so, the framework alleviates the burden imposed on human operators who currently need to manually input highly detailed mission specifications into multiple configuration files, which increases the risk for mission failure due to human error. Instead, the framework makes it possible for the human operators to specify the missions in an easy-to-use, structured language.The technical contribution of the dissertation stems from a novel treatment of the combined mission and motion-planning problem as a hybrid search over discrete and continuous layers. Leveraging advances in AI and Robotics, a hybrid-planning framework is developed which combines high-level AI mission planning with low-level sampling-based motion planning. High-level planning, which operates over a discrete and abstract layer, breaks down the overall mission into a sequence of tasks. Sampling-based motion planning conducts a search over the feasible motions of the AUV in order to compute a trajectory that enables the AUV to accomplish each task. When sampling-based motion planning fails to make progress it requests another high-level plan from the AI planning layer. This interplay between high-level discrete planning and sampling-based motion planning is crucial to the success of the framework.The hybrid framework can be used with any AUV. Extensive experiments have been conducted with high-fidelity simulators and real AUVs, such as OceanServer Iver2 AUV and Reliant Bluefin-21 AUV. The experimental results show the ability of the approach to effectively plan collision-free and dynamically-feasible trajectories that enable the AUV to carry out sophisticated missions, such as inspection of numerous areas, data collection, and reacquisition and identification in Mine Countermeasures. The success of the hybrid framework highlight the potential of the approach to enhance the autonomy of AUVs, making it possible to carry out sophisticated missions at a lower operational cost
SENSOR SOURCE LOCATION PRIVACY BASED ON RANDOM PERTURBATIONS
No full textThis thesis deals with securing the source location in Wireless Sensor Networks (WSNs). Sensor source location privacy, which means to protect source sensors' locations of network traffic, is an emerging topic in wireless sensor networks, because it cannot be fully addressed by traditional cryptographic mechanisms, such as encryption and authentication. Current source location privacy schemes, assuming either a local or global attack model, have limitations. For example, schemes under a global attack model are subject to a so called `01' attack, during which an attacker can potentially identify real messages. Targeting on tackling this attack, I propose two perturbation schemes, one based on Uniform distribution and the other based on Gaussian distribution. I analyze the security properties of these two schemes. I also simulate them and compare them with previous schemes, with the results showing that the proposed perturbation schemes can improve the source location privacy significantly.However, to deal with the proposed defensive schemes based on random perturbations, the attacker may employ some intelligent statistical tools, such as Univariate Distribution based Reconstruction (UDR), to reconstruct the original message time intervals and further to find out real sources. I propose a Risk Region (RR) based technique, to prevent the attacker from successfully doing this. Performance evaluation shows that the RR-based scheme increases the errors of the attacker, so that the attacker is not able to accurately derive real messages and sources.Degree awarded: D. Engr. Electrical Engineering and Computer Science. The Catholic University of Americ
A construção do “eu” na poesia de Cecília Meireles
No full textThe work of Cecília Meireles is marked by the presence of the self, which causedsome of her readers to try to relate the life of this artist to what she wrote. However,the self that appears in her work is the result of her work with the discourse, sinceCecilia Meireles creates new life from her writing, building a lived from a poet and notthe opposite. What we want to discuss here, from the analysis of some poems andsome letters that Cecília Meireles exchanges with a Portuguese writer, is how this Iconstructs himself in her poetic discourse and how much the author was aware of thisdiscursive process.A obra de Cecília Meireles é marcada pela presença do eu, o que fez com que alguns de seus leitores tentassem relacionar a vida dessa artista com aquilo que ela escrevia. Contudo, o eu que aparece em sua obra é fruto de seu trabalho com o discurso, já que Cecília Meireles cria vida nova a partir de sua escrita, construindo um vivido a partir de um poetado e não o contrário. O que se pretende discutir aqui, a partir da análise de alguns poemas e de algumas cartas que Cecília Meireles troca com um escritor português, é como esse eu se constrói em seu discurso poético e o quanto a autora tinha consciência desse processo discursivo
Esparsos: a obra inédita de Cecília Meireles
No full textCecília Meireles is one of the most important writers of Brazilian literature and her work is receiving more and more attention from the Brazilian publishing market. Over the years, different editions of her books have revealed that Cecília Meireles has a much larger work than that formed by the 27 volumes of poems that she published throughout her life. These texts, published by the author in different newspapers and magazines with which she collaborated throughout her life, were grouped, in the editions of her Complete Poetry, under the title of dispersed, but, rare exceptions, are not even mentioned in her poetic work , which makes locating this material hard work, and which, it seems, has not yet ended. Proof of this is the “Poem from another life”, a text that has remained unpublished until now. What is intended in this article is not only to present this poem, but also to discuss as part of Cecília Meireles' work not grouped in books, it is part of the literary project that she carried out throughout her life.Cecília Meireles é uma das mais importantes escritoras da literatura brasileira e sua obra vem recebendo cada vez mais atenção do mercado editorial brasileiro. Ao longo dos anos, diferentes edições de seus livros foram revelando que Cecília Meireles tem uma obra muito maior do que aquela formada pelos 27 volumes de poemas que publicou ao longo de sua vida. Esses textos, publicados pela autora em diferentes jornais e revistas com os quais colaborou ao longo de sua vida, foram agrupados, nas edições da sua Poesia completa, sob o título de dispersos, mas, raras exceções, não são sequer mencionados em sua obra poética, o que torna a localização desse material um trabalho árduo, e que, ao que tudo indica, ainda não terminou. Prova disso é o “Poema de uma outra vida”, texto que permaneceu inédito até o momento. O que se pretende, nesse artigo, é não apenas apresentar esse poema, como também discutir como parte da obra de Cecília Meireles não agrupada em livros se insere no projeto literário que a escritora realizou ao longo de sua vida
Avaliação dos efeitos tóxicos sobre o sistema nervoso periférico, decorrentes da exposição ocupacional ao chumbo
No full textEscola Bahiana de Medicina e Saúde Pública. Fundação Bahiana para o Desenvolvimento das Ciências. Salvador, BA, Brasil / Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.Após descrever a interação do homem com meio ambiente, em particular nas atividades laborativas, se destaca a extração e o processamento dos minérios de chumbo como importante fonte de exposição ocupacional a este metal, que gerou no passado grandes casuísticas de intoxicação. Em seguida é feito um relato de como ocorreu a exposição ocupacional ao chumbo em Santo Amaro da Purificação na Bahia, e uma revisão da toxicologia deste metal, identificando-se a necessidade de se trabalhar com indicadores, parâmetros, que melhor reflitam os efeitos cumulativos, como os que ocorrem no sistema nervoso periférico. Analisar e discutir as alterações do sistema nervoso periférico pós exposição ocupacional, em um grupo de ex-empregados de uma metalurgia primária de chumbo; e identificar marcadores que melhor reflitam os efeitos da bioacumulação deste metal. A partir de dados secundários, foi construída uma serie de casos, na qual se analisou o passado clínico e toxicológico, e a relação com os achados neurofisiológicos. Os dados analisados, demonstraram a ocorrência, de um leque de neuropatias periféricas em todo o grupo, mas as alterações da condução motora em membros superiores, que tem sido melhor relacionadas aos efeitos tóxicos do chumbo, não foram tão consistentes. Ficou comprovado ser a media acumulada do chumbo no sangue um marcador biológico mais fidedigno, para avaliações de efeitos de longo prazo como as alterações sobre o sistema nervoso periférico.Under the frannework of the interactions between man and the environment, particularly at work, the author describes the occupational lead exposure during the ore smelting process based on the case of the former smelter plant at Santo Amaro - Bahia - Brazil. In the past, many cases of intoxication among the work force occurred, specially of neurotoxicity, better identified by the introduction of the electromyography in the seventies of the XX century. The author highlights the lack of follow up studies and the need to identify straight biomarkers which could operate as proxy indicators of past cumulative lead exposure, particularly that could be developed from individual health records. This study is based upon a case series of 92 former workers selected by the existence of follow up electromyography between 1999 and 2000 (by them the exposure has ended). It has been possible to extract from the health records the past clinical and toxicological history of each worker included in the studied series. It has been demonstrated that the cumulative media of blood lead levels measured over time during the exposure period, can be used as a proxy biomarker indirect indicator of past exposure to assess long term neurotoxicity effects. A range of periferic neuropathies where observed, however the relationship with the electromyographic effects was lower than expected, possibly due to an interaction effect with other pollutant metals to which the workers were simultaneously exposed
A narrative-based collaborative writing tool for coherent technical documents
No full textOne important feature of an effective document that makes it easy to read and understand is known as coherence. Technical documents produced collaboratively are often incoherent due to a lack of group consensus and misaligned contributions by the individual authors. However, current document planning techniques and writing tools do not provide explicit support for improving coherence. The goal of this research, therefore, is to develop and evaluate a new technique and tool that helps teams of authors to structure coherent technical documents. The coherence of a document can be attributed to the story (or narrative) it conveys to the reader. If this story is consistent and coherent, the same can be said about the document. A discourse theory such as Rhetorical Structure Theory (RST) that has been developed by linguists helps further to analyse and improve a narrative. RST explains the coherence of a text by virtue of relationships (such as “paragraph A justifies paragraph B”) between parts of the text. This research has combined the ideas from these parallel strands of research to develop a new document planning technique called narrative-based writing. The method involves writing down an explicit précis of the story (called a document narrative or DN) and then analysing it using RST. The DN and RST analysis are then used to structure the eventual document. To extend the usability of narrative-based writing to geographically-dispersed authors, I have designed and implemented a collaborative tool that allows co-authors to edit, analyse and review DNs. The thorough design for the tool uses a combination of three models (conceptual, business process and functional) culminating in a set of functions that enable collaborative narrative-based writing. This dissertation discusses how, in the future, these functions could be incorporated in existing collaborative writing tools. Implementing this tool, albeit in its current prototypic state, has been invaluable in understanding the complexities of modelling and manipulating DNs and RST structures. Initial investigations using the new technique and tool have been positive, encouraging me to continue the research and evaluation in this field
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