2,410 research outputs found

    The Rafita asteroid family

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    The Rafita asteroid family is an S-type group located in the middle main belt, on the right side of the 3J:-1A mean-motion resonance. The proximity of this resonance to the family left side in semi-major axis caused many former family members to be lost. As a consequence, the family shape in the (a,1/D)(a,1/D) domain is quite asymmetrical, with a preponderance of objects on the right side of the distribution. The Rafita family is also characterized by a leptokurtic distribution in inclination, which allows the use of methods of family age estimation recently introduced for other leptokurtic families such as Astrid, Hansa, Gallia, and Barcelona. In this work we propose a new method based on the behavior of an asymmetry coefficient function of the distribution in the (a,1/D)(a,1/D) plane to date incomplete asteroid families such as Rafita. By monitoring the time behavior of this coefficient for asteroids simulating the initial conditions at the time of the family formation, we were able to estimate that the Rafita family should have an age of 490±200490\pm200 Myr, in good agreement with results from independent methods such as Monte Carlo simulations of Yarkovsky and Yorp dynamical induced evolution and the time behaviour of the kurtosis of the sin(i)\sin{(i)} distribution. Asteroids from the Rafita family can reach orbits similar to 8\% of the currently known near Earth objects. \simeq1\% of the simulated objects are present in NEO-space during the final 10 Myr of the simulation, and thus would be comparable to objects in the present-day NEO population.Comment: Accepted 2017 January 19. Received 2017 January 17; in original form 2016 September

    Commentary: Quantitative home-based assessment of Parkinson’s symptoms: The SENSE-PARK feasibility and usability study

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    "Healthcare professionals and pharmaceutical companies invest a great amount of time and effort in continuously creating electronic health solutions. These technology system developments may represent a step forward in care as ultimately it is not possible to manage what cannot be evaluated. Yet, the use of future generations of technology depends on their specific design, fabrication, distribution, and, most importantly, patients adopting these new technologies as life companions. Data management and the use of artificial intelligence appear as new technological challenges. The overload, sharing and handling of information give rise to new legal, social, and ethical discussions in a field where there is a lack of universal criteria for data ownership, privacy and sharing. Future technological progress requires much cooperation between multidisciplinary teams including sufficient sharing and benchmarking within open access frameworks"info:eu-repo/semantics/publishedVersio

    Commentary: A systematic review of the characteristics and validity of monitoring technologies to assess Parkinson’s disease

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    "Technologies may have implications for improving clinical diagnosis and prognosis, and for the development of therapeutic interventions, specific biomarkers, and preventive strategies. Given the amount of existing and ever-growing quantitative assessments using technology in PD, clinicians, patients and researchers are faced with the challenge of deciding which assessment tool to use in the laboratory, clinic and home environment. In order to facilitate this decision-making a systematic review was done to identify and classify the available monitoring technologies for individuals with PD over the last 2 decades. This is a commentary on the systematic review which adds on discussion on some controversial issues in the area. It tackles some of current open-to-discussion topics in the technology field, such as: which definitions to use, the heterogeneity of the clinimetric properties among technologies, standardization of a validation process, how to group different measuring technologies, and the need to conduct further studies on existing technologies before developing new ones. The strength of this comprehensive, timely and useful review is the detailed and robust approach taken by authors to classify technologies as listed, suggested, or recommended for the assessment of individuals with PD."info:eu-repo/semantics/publishedVersio

    Les donations

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    L'Avant-projet traite des donations en les présentant comme un des contrats nommés. La matière des libéralités, dans le projet de Code civil du Québec, est fragmentée entre les successions, pour les testaments, et les obligations, pour les donations. L'article présente une étude systématique et comparative avec le droit actuel de la législation proposée en la matière. Il souligne les aspects restés inchangés, les modifications apportées, les ambiguïtés ou lacunes des textes proposés. Pour ce faire, il a souvent fallu se référer à d'autres parties de l'Avant-projet, puisque les donations ne sont plus présentées que comme un contrat nommé parmi les autres. Mais la présentation suit le plan traditionnellement suivi par la doctrine en la matière : notion de libéralités, conditions de fond et deforme, effets des donations et enfin donations par contrat de mariage. Ceci permet de souligner pour chacun des points principaux les similitudes et différences avec le droit actuel selon une présentation connue des lecteurs. Ainsi, la notion de libéralité reste inchangée. On semble avoir voulu généraliser le don manuel à tous les biens meubles, sans qu'il soit certain, cependant, que l'on soit parvenu à ce résultat. On a omis d'émettre en plusieurs points les règles générales, laissant ainsi place à des difficultés d'application ou d'interprétation. lien est ainsi par exemple pour ce qui est de la forme des donations, de l'obligation aux dettes et de la définition des différents types de donation.The Draft Bill deals with gifts by presenting them as nominate contracts. Matters pertaining to liberalities in the proposed Québec Civil Code are divided between successions for wills and obligations for gifts. The article presents a systematic and comparative study of proposed legislation on gifts within the context of existing law. It underscores areas that remain unchanged, amendments made as well as ambiguities or omissions in proposed texts. To do this, it was often necessary to refer to other parts of the Drafts Bill, since gifts are only presented as being one nominate contract among other such contracts. Otherwise the presentation follows the traditional pattern found in doctrinal studies on the matter : the notion of liberality, conditions of substance and form, effects of gifts and, lastly, gifts by contract of marriage. This makes it possible to highlight each of the main points converging with or diverging from present law in a way that is familiar to readers. Thus the concept of liberality remains unchanged. There seems to have been a will to generalize the gift by delivery to all movable property — without it being evident that such result has been obtained. General rules have not been expounded into a sufficient number of points such that there may be room for difficulties in enforcement and interpretation. For instance, this occurs in matters pertaining to the form of gifts, obligations with regard to debts and the definition of varying types of gifts

    Referral to rehabilitation in Parkinson's disease: who, when and to what end?

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    © The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License.The current state of evidence in non-pharmacological treatments amounts to an impending paradigm shift in neurology where physicians should be alerted that some rehabilitation interventions are already supported in current therapeutic guidelines. This manuscript aims to overview the best scientific data supporting referral to rehabilitation services in order to help physicians make the best use of the existing evidence for non-pharmacological treatments in the different stages of Parkinson's disease.info:eu-repo/semantics/publishedVersio
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