Schmidt balls around the identity

Robustness measures as introduced by Vidal and Tarrach [PRA, 59, 141-155] quantify the extent to which entangled states remain entangled under mixing. Analogously, we introduce here the Schmidt robustness and the random Schmidt robustness. The latter notion is closely related to the construction of Schmidt balls around the identity. We analyse the situation for pure states and provide non-trivial upper and lower bounds. Upper bounds to the random Schmidt-2 robustness allow us to construct a particularly simple distillability criterion. We present two conjectures, the first one is related to the radius of inner balls around the identity in the convex set of Schmidt number n-states. We also conjecture a class of optimal Schmidt witnesses for pure states.Comment: 7 pages, 1 figur

Attachment and adaptation to breast cancer: The mediating role of avoidant emotion processes

Attachment insecurity is associated with difficulties in adapting to cancer. Accumulating evidence points to the influence of avoidant emotion processes in this association. This study explored this pathway by examining the association between attachment insecurity and quality of life in women with breast cancer, and by exploring the mediating role of two avoidant emotion processes in this association. Women with breast cancer (N = 155) completed measures of attachment, emotional suppression, emotional awareness and quality of life. Avoidance of attachment was positively associated with emotional suppression (β = .29, p \u3c .01) and lack of emotional awareness (β = .27, p \u3c .01), and negatively associated with quality of life (β = −.22, p \u3c .05). Lack of emotional awareness partially mediated the relationship between attachment avoidance and quality of life (indirect effect β = −.12, p = .008). Attachment anxiety was not associated with any variable. Attachment avoidance may hinder the process of adaptation to breast cancer and difficulties in identifying and describing emotions may be partly responsible for this influence. Access to and ability to benefit from social and medical supports is likely to depend on being able to engage with others and recognise and process emotions effectively. Research and clinical implications are discussed

Attachment and adaptation to breast cancer: The mediating role of avoidant emotion processes

Attachment insecurity is associated with difficulties in adapting to cancer. Accumulating evidence points to the influence of avoidant emotion processes in this association. This study explored this pathway by examining the association between attachment insecurity and quality of life in women with breast cancer, and by exploring the mediating role of two avoidant emotion processes in this association. Women with breast cancer (N = 155) completed measures of attachment, emotional suppression, emotional awareness and quality of life. Avoidance of attachment was positively associated with emotional suppression (β = .29, p \u3c .01) and lack of emotional awareness (β = .27, p \u3c .01), and negatively associated with quality of life (β = −.22, p \u3c .05). Lack of emotional awareness partially mediated the relationship between attachment avoidance and quality of life (indirect effect β = −.12, p = .008). Attachment anxiety was not associated with any variable. Attachment avoidance may hinder the process of adaptation to breast cancer and difficulties in identifying and describing emotions may be partly responsible for this influence. Access to and ability to benefit from social and medical supports is likely to depend on being able to engage with others and recognise and process emotions effectively. Research and clinical implications are discussed

Avaliação e caracterização de frutos em acessos de patauazeiro.

O patauazeiro é uma palmeira nativa da Amazônia cujos frutos apresentam grande potencial sócio econômico, principalmente, às populações tradicionais. Mas, pouco se sabe sobre as características físicas dos frutos dessa palmeira, especialmente dos acessos disponíveis em Bancos de Germoplasma que possam auxiliar na sua domesticação. O objetivo deste trabalho foi avaliar e caracterizar frutos de acessos de patauazeiro. Para tanto, foram retiradas amostras ao acaso de dez frutos maduros por acesso, de nove acessos pertencentes ao Banco de Germoplasma da Embrapa Amazônia Oriental. De cada amostra foram avaliados nove caracteres e caracterizados dois caracteres. Os dados obtidos foram submetidos à análise de estatística descritiva. Foi constatada variação em todos os caracteres avaliados, podendo-se destacar o diâmetro longitudinal, pesos do fruto, da polpa e da semente, além da espessura da polpa, cuja variação foi superior a 20%. No que se refere à caracterização, os acessos apresentaram cor da casca violácea em duas gradações, enquanto para a polpa ocorreram duas colorações: amarela e laranja, com a primeira exibindo duas gradações. Portanto, pode-se considerar que os acessos de patauazeiro avaliados apresentam variações consideráveis para as características de frutos, podendo-se identificar genótipos com alto rendimento de polpa

Avaliação e caracterização morfológica de frutos em acessos de diferentes espécies de bacabeiras.

Espécies do gênero Oenocarpus Mart. conhecidas por bacabeiras têm grande potencial para exploração da polpa de seus frutos. A Embrapa Amazônia Oriental possui um Banco de Germoplasma dessas espécies cujos acessos encontram-se em plena fase reprodutiva, mas com escassez de informações que possam auxiliar na domesticação dessas palmeiras. Objetivo-se avaliar e caracterizar morfologicamente frutos de acessos de diferentes espécies de bacabeiras. Foram retiradas amostras ao acaso de dez frutos maduros por acesso, de quatro espécies de Oenocarpus conservadas no Banco de Germoplasma da Embrapa Amazônia Oriental. Os frutos foram avaliados para nove caracteres e caracterizados para dois, sendo submetidos à análise de estatística descritiva. Foi constatada alta variação em todos os caracteres avaliados, com destaque aos pesos do fruto, da polpa e da semente, além do rendimento da polpa com mais de 40%. Na caracterização houve variação, sendo mais forte na cor da polpa. Portanto, acessos dessas quatro espécies de bacabeiras conservados na Embrapa Amazônia Oriental têm alta variação para a maioria dos caracteres de frutos, com destaque para o rendimento de polpa e podem ser utilizados na discriminação entre e dentro das espécies

Solos do campo experimental da Embrapa Milho e Sorgo: suas características e classificação no novo Sistema Brasileiro.

bitstream/CNPS/11831/1/bpd05_2002_milho_sorgo.pd

Faithful Squashed Entanglement

Squashed entanglement is a measure for the entanglement of bipartite quantum states. In this paper we present a lower bound for squashed entanglement in terms of a distance to the set of separable states. This implies that squashed entanglement is faithful, that is, strictly positive if and only if the state is entangled. We derive the bound on squashed entanglement from a bound on quantum conditional mutual information, which is used to define squashed entanglement and corresponds to the amount by which strong subadditivity of von Neumann entropy fails to be saturated. Our result therefore sheds light on the structure of states that almost satisfy strong subadditivity with equality. The proof is based on two recent results from quantum information theory: the operational interpretation of the quantum mutual information as the optimal rate for state redistribution and the interpretation of the regularised relative entropy of entanglement as an error exponent in hypothesis testing. The distance to the set of separable states is measured by the one-way LOCC norm, an operationally-motivated norm giving the optimal probability of distinguishing two bipartite quantum states, each shared by two parties, using any protocol formed by local quantum operations and one-directional classical communication between the parties. A similar result for the Frobenius or Euclidean norm follows immediately. The result has two applications in complexity theory. The first is a quasipolynomial-time algorithm solving the weak membership problem for the set of separable states in one-way LOCC or Euclidean norm. The second concerns quantum Merlin-Arthur games. Here we show that multiple provers are not more powerful than a single prover when the verifier is restricted to one-way LOCC operations thereby providing a new characterisation of the complexity class QMA.Comment: 24 pages, 1 figure, 1 table. Due to an error in the published version, claims have been weakened from the LOCC norm to the one-way LOCC nor

Automatic detection of Acacia longifolia invasive species based on UAV-acquired aerial imagery

The Acacia longifolia species is known for its rapid growth and dissemination, causing loss of biodiversity in the affected areas. In order to avoid the uncontrolled spread of this species, it is important to effectively monitor its distribution on the agroforestry regions. For this purpose, this paper proposes the use of Convolutional Neural Networks (CNN) for the detection of Acacia longifolia, from images acquired by an unmanned aerial vehicle. Two models based on the same CNN architecture were elaborated. One classifies image patches into one of nine possible classes, which are later converted into a binary model; this model presented an accuracy of and in the validation and training sets, respectively. The second model was trained directly for binary classification and showed an accuracy of and for the validation and test sets, respectively. The results show that the use of multiple classes, useful to provide the aerial vehicle with richer semantic information regarding the environment, does not hamper the accuracy of Acacia longifolia detection in the classifier’s primary task. The presented system also includes a method for increasing classification’s accuracy by consulting an expert to review the model’s predictions on an automatically selected sub-set of the samples.info:eu-repo/semantics/publishedVersio

Caracterização da ictiofauna durante as estações de inverno e verão na ressaca da Lagoa dos Índios, Macapá - AP.

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Thermal Convection of an Ellis Fluid Saturating a Porous Layer with Constant Heat Flux Boundary Conditions

The present work analyzes the thermal instability of mixed convection in a horizontal porous channel that is saturated by a shear-thinning fluid following Ellis’ rheology. The fluid layer is heated from below by a constant heat flux and cooled from above by the same heat flux. The instability of such a system is investigated by means of a small-disturbances analysis and the resulting eigenvalue problem is solved numerically by means of a shooting method. It is demonstrated that the most unstable modes on the instability threshold are those with infinite wavelength and an analytical expression for such conditions is derived from an asymptotic analysis. Results show that the non-Newtonian character of the fluid has a destabilizing role