Quantum authentication with unitary coding sets

A general class of authentication schemes for arbitrary quantum messages is proposed. The class is based on the use of sets of unitary quantum operations in both transmission and reception, and on appending a quantum tag to the quantum message used in transmission. The previous secret between partners required for any authentication is a classical key. We obtain the minimal requirements on the unitary operations that lead to a probability of failure of the scheme less than one. This failure may be caused by someone performing a unitary operation on the message in the channel between the communicating partners, or by a potential forger impersonating the transmitter.Comment: RevTeX4, 10 page

Image Denoising using Attention-Residual Convolutional Neural Networks

During the image acquisition process, noise is usually added to the data mainly due to physical limitations of the acquisition sensor, and also regarding imprecisions during the data transmission and manipulation. In that sense, the resultant image needs to be processed to attenuate its noise without losing details. Non-learning-based strategies such as filter-based and noise prior modeling have been adopted to solve the image denoising problem. Nowadays, learning-based denoising techniques showed to be much more effective and flexible approaches, such as Residual Convolutional Neural Networks. Here, we propose a new learning-based non-blind denoising technique named Attention Residual Convolutional Neural Network (ARCNN), and its extension to blind denoising named Flexible Attention Residual Convolutional Neural Network (FARCNN). The proposed methods try to learn the underlying noise expectation using an Attention-Residual mechanism. Experiments on public datasets corrupted by different levels of Gaussian and Poisson noise support the effectiveness of the proposed approaches against some state-of-the-art image denoising methods. ARCNN achieved an overall average PSNR results of around 0.44dB and 0.96dB for Gaussian and Poisson denoising, respectively FARCNN presented very consistent results, even with slightly worsen performance compared to ARCNN.Comment: Published in: 2020 33rd SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI

Genome visualization in space

Phylogeny is an important field to understand evolution and the organization of life. However, most methods depend highly on manual study and analysis, making the construction of phylogeny error prone. Linear Algebra methods are known to be efficient to deal with the semantic relationships between a large number of elements in spaces of high dimensionality. Therefore, they can be useful to help the construction of phylogenetic trees. The ability to visualize the relationships between genomes is crucial in this process. In this paper, a linear algebra method, followed by optimization, is used to generate a visualization of a set of complete genomes. Using the proposed method we were able to visualize the relationships of 64 complete mitochondrial genomes, organized as six different groups, and of 31 complete mitochondrial genomes of mammals, organized as nine different groups. The prespecified groups could be seen clustered together in the visualization, and similar species were represented close together. Besides, there seems to be an evolutionary influence in the organization of the graph

INDICADORES DE DESEMPENHO DAS IFES DA REGIÃO NORDESTE: UMA ANÁLISE COMPARATIVA

A partir do ano de 2002, o Tribunal de Contas da União (TCU) determinou que as Instituições Federais de Ensino Superior (IFES) incluam nove indicadores de desempenho em seus relatórios de gestão, com o intuito de construir uma série histórica da evolução de aspectos gerenciais relevantes, orientando seus gestores às boas práticas administrativas. Em virtude da crescente necessidade de mensurar o nível de eficiência do setor público e com base nos indicadores de desempenho elaborados pelo TCU, esse artigo tem como objetivo analisar os resultados obtidos pela Universidade Federal de Sergipe no ano 2010 verificando a situação atual desta Instituição em relação às outras Universidades da Região Nordeste. A metodologia utilizada para o desenvolvimento do trabalho é de natureza aplicada. Com relação aos objetivos, é descritiva; quanto aos procedimentos, é documental; e a abordagem do problema é desenvolvida sob o aspecto qualitativo e quantitativo. Os resultados apontaram que a Universidade Federal de Sergipe encontra-se em situação equilibrada no que tange à maioria dos indicadores e comparativamente às demais IFES da região em que está inserida

On The Mechanism Of The Aza-morita-baylis-hillman Reaction: Esi-ms Interception Of A Unique New Intermediate.

Solutions of aza-Morita-Baylis-Hillman (aza-MBH) reactions were directly monitored by ESI(+)-MS(/MS) spectrometry to obtain information on their mechanism. A unique bis-sulfonamide intermediate was intercepted and characterized and, based on this novel species, a mechanism that rationalizes the uniqueness of aza-MBH reactions is proposed.476593-

A psicose em Lacan: mutações da teoria a partir da clínica

Este artigo pretende investigar quais definições sobre a psicose encontram-se na teoria psicanalítica lacaniana, entre as décadas de 1950 e 1960. Faremos um percurso localizando como Lacan parte da Psiquiatria em direção às ideias de Freud, retirando a psicose de uma condição patológica elevando-a a uma das três estruturas clínicas. Interrogaremos o que faz da psicose, na década de 1950, uma estrutura marcada por um déficit simbólico em relação à neurose e apresentaremos a concepção lacaniana acerca dos fenômenos elementares presentes no desencadeamento da psicose, o mecanismo estruturante dos sujeitos psicóticos e a solução apontada por Lacan para estabilização da crise. Quanto à década de 1960, introduziremos o objeto real formulado por Lacan, o objeto a, buscando descrever as principais implicações dessa nova teorização para a concepção de psicose. Ao compararmos esses dois momentos da teoria lacaniana, buscamos demonstrar como a introdução do objeto a modifica o paradigma lacaniano acerca da psicose fundado na forclusão do Nome-do-Pai. Palavras-chave: Psicose. Psicanálise. Lacan

Fullerenes In Asphaltenes And Other Carbonaceous Materials: Natural Constituents Or Laser Artifacts.

The presence of fullerenes as natural constituents of carbonaceous materials or their formation as laser artifacts during laser desorption ionization (LDI) mass spectrometry (MS) analysis is reinvestigated and reviewed. The results using asphaltene samples with varying composition as well as standard polycyclic aromatic hydrocarbons (PAH) and fullerene samples as models have demonstrated that indeed Cn ring fullerenes are not natural constituents but they are formed as common and often as predominant artifacts upon laser radiation, and a series of incorrect assignments based on LDI-MS data of several carbonaceous materials seems unfortunately to have been made. When the present results are evaluated also in the light of the vast literature on LDI-MS of carbonaceous materials, the formation of fullerene artifacts seems particularly common for LDI-MS analysis of asphaltenes and other carbonaceous samples with considerably high levels of PAH and varies according to the type of laser used, and the intensity of the laser beam.14