Eleatic Ontology in Aristotle: Introduction

The introduction summarizes the six new papers collected in Volume 1, Tome 5: Eleatic Ontology and Aristotle. The papers take a fresh look at virtually every aspect of Aristotle’s engagement with Eleaticism. They are particularly concerned with Aristotle’s responses to Parmenidean monism, the Eleatic rejection of change, and Zeno’s paradoxes. The contributions also focus on the ways in which Aristotle developed several of his own theories in metaphysics and natural science partly in reaction to Eleatic puzzles and arguments

Integral D-Finite Functions

We propose a differential analog of the notion of integral closure of algebraic function fields. We present an algorithm for computing the integral closure of the algebra defined by a linear differential operator. Our algorithm is a direct analog of van Hoeij's algorithm for computing integral bases of algebraic function fields

High frame-rate cardiac ultrasound imaging with deep learning

Cardiac ultrasound imaging requires a high frame rate in order to capture rapid motion. This can be achieved by multi-line acquisition (MLA), where several narrow-focused received lines are obtained from each wide-focused transmitted line. This shortens the acquisition time at the expense of introducing block artifacts. In this paper, we propose a data-driven learning-based approach to improve the MLA image quality. We train an end-to-end convolutional neural network on pairs of real ultrasound cardiac data, acquired through MLA and the corresponding single-line acquisition (SLA). The network achieves a significant improvement in image quality for both $5-$ and $7-$line MLA resulting in a decorrelation measure similar to that of SLA while having the frame rate of MLA.Comment: To appear in the Proceedings of MICCAI, 201

Investigação e Paradoxo do Mênon: Aristóteles, Segundos Analíticos II 8

This paper discusses some issues about Aristotle’s theory of scientificinvestigation in Posterior Analytics II 8. Aristotle says that scientific investigationcomes in three stages. My point is that Aristotle’s theory of scientific investigation cannot avoid Meno’s paradox – the paradox about the impossibility ofwhatsoever sort of investigation – unless its second stage, the stage in which oneestablishes that an object exists, is understood in terms of establishing that theobject is a legitimate explanandum in the domain of a given science.Este artigo discute certos problemas que aparecem na teoria aristotélica da investigaçãocientífica no capítulo 8 do livro II dos Segundos Analíticos de Aristóteles. Aristótelesdistingue três estágios de investigação científica. Meu ponto é que a teoria aristotélicada investigação científica consegue evitar o paradoxo de Mênon – sobre a impossibilidadede qualquer investigação – apenas se o segundo estágio reconhecido por Aristóteles, oestágio em que se estabelece que o objeto existe, for entendido como estágio em que seestabelece que o objeto em questão existe a título de explanandum legítimo no domíniode uma dada ciência

Spatial Electron-hole Separation in a One Dimensional Hybrid Organic-Inorganic Lead Iodide.

The increasing efficiency of the inorganic-organic hybrid halides has revolutionised photovoltaic research. Despite this rapid progress, the significant issues of poor stability and toxicity have yet to be suitably overcome. In this article, we use Density Functional Theory to examine (Pb2I6) · (H2DPNDI) · (H2O) · (NMP), an alternative lead-based hybrid inorganic-organic solar absorber based on a photoactive organic cation. Our results demonstrate that optical properties suitable for photovoltaic applications, in addition to spatial electron-hole separation, are possible but efficient charge transport may be a limiting factor

Symptomatic Recovery in Miller Fisher Syndrome Parallels Vestibular–Perceptual and not Vestibular–Ocular Reflex Function

Unpleasant visual symptoms including oscillopsia and dizziness may occur when there is unexpected motion of the visual world across the subject's retina (“retinal slip”) as in an acute spontaneous nystagmus or on head movement with an acute ophthalmoplegia. In contrast, subjects with chronic ocular dysmotility, e.g., congenital nystagmus or chronic progressive external ophthalmoplegia, are typically symptom free. The adaptive processes that render chronic patients asymptomatic are obscure but may include a suppression of oscillopsia perception as well as an increased tolerance to perceived oscillopsia. Such chronic asymptomatic patients display an attenuation of vestibular-mediated angular velocity perception, implying a possible contributory role in the adaptive process. In order to assess causality between symptoms, signs (i.e., eye movements), and vestibular–perceptual function, we prospectively assessed symptom ratings and ocular-motor and perceptual vestibular function, in a patient with acute but transient ophthalmoplegia due to Miller Fisher Syndrome (as a model of visuo-vestibular adaptation). The data show that perceptual measures of vestibular function display a significant attenuation as compared to ocular-motor measures during the acute, symptomatic period. Perhaps significantly, both symptomatic recovery and normalization of vestibular–perceptual function were delayed and then occurred in a parallel fashion. This is the first report showing that symptomatic recovery of visuo-vestibular symptoms is better paralleled by vestibular–perceptual testing than vestibular–ocular reflex (VOR) measures. The findings may have implications for the understanding of patients with chronic vestibular symptoms where VOR testing is often unhelpful

Deaths on board: medical and legal implications for the maritime physician

When death at sea occurs many people are implicated. The assignees of victims often look for detailed circumstances of deaths at sea, and the doctor, besides his preventative role, has to certify the death on board and try to determine the circumstances with a view to a legal investigation if it proves necessary. In this work are presented the main causes, facts, and characteristics of human deaths at sea, and the responsibility of the ship's doctor in case of death on board. Int Marit Health 2010; 61, 1: 24-2