12,073 research outputs found
Towards Evidence Based M-Health Application Design in Cancer Patient Healthy Lifestyle Interventions
Cancer is one of the most prevalent diseases in
Europe and the world. Significant correlations between dietary
habits and cancer incidence and mortality have been
confirmed by the literature. Physical activity habits are also
directly implicated in the incidence of cancer. Lifestyle
behaviour change may be benefited by using mobile technology
to deliver health behaviour interventions. M-Health offers a
promising cost-efficient approach to deliver en-masse
interventions. Smartphone apps with constructs such as
gamification and personalized have shown potential for
helping individuals lose weight and maintain healthy lifestyle
habits. However, evidence-based content and theory-based
strategies have not been incorporated by those apps
systematically yet. The aim of the current work is to put the
foundations for a methodologically rigorous exploration of
wellness/health intervention literature/app landscape towards
detailed design specifications for connected health m-apps. In
this context, both the overall work plan is described as well as
the details for the significant steps of application space and
literature space review. Both strategies for research and initial
outcomes of it are presented. The expected evidence based
design process for patient centered health and wellness
interventions is going to be the primary input in the
implementation process of upcoming patient centered
health/wellness m-health interventions.ENJECT COST-STSM-ECOST-STSM-TD1405-220216-07045
Design of Loss Functions for Solving Inverse Problems using Deep Learning
Solving inverse problems is a crucial task in several applications that strongly a ffect our daily lives, including multiple engineering fields, military operations, and/or energy production. There exist different methods for solving inverse problems, including gradient based methods, statistics based methods, and Deep Learning (DL) methods. In this work, we focus on the latest. Speci fically, we study the design of proper loss functions for dealing with inverse problems using DL. To do this, we introduce a simple benchmark problem with known analytical solution. Then, we propose multiple loss functions and compare their performance when applied to our benchmark example problem. In addition, we analyze how to improve the approximation of the forward function by: (a) considering a Hermite-type interpolation loss function, and (b) reducing the number of samples for the forward training in the Encoder-Decoder method. Results indicate that a correct desig
Fragility and hysteretic creep in frictional granular jamming
The granular jamming transition is experimentally investigated in a
two-dimensional system of frictional, bi-dispersed disks subject to
quasi-static, uniaxial compression at zero granular temperature. Currently
accepted results show the jamming transition occurs at a critical packing
fraction . In contrast, we observe the first compression cycle exhibits
{\it fragility} - metastable configuration with simultaneous jammed and
un-jammed clusters - over a small interval in packing fraction (). The fragile state separates the two conditions that define
with an exponential rise in pressure starting at and an exponential
fall in disk displacements ending at . The results are explained
through a percolation mechanism of stressed contacts where cluster growth
exhibits strong spatial correlation with disk displacements. Measurements with
several disk materials of varying elastic moduli and friction coefficients
, show friction directly controls the start of the fragile state, but
indirectly controls the exponential slope. Additionally, we experimentally
confirm recent predictions relating the dependence of on . Under
repetitive loading (compression), the system exhibits hysteresis in pressure,
and the onset increases slowly with repetition number. This friction
induced hysteretic creep is interpreted as the granular pack's evolution from a
metastable to an eventual structurally stable configuration. It is shown to
depend upon the quasi-static step size which provides the only
perturbative mechanism in the experimental protocol, and the friction
coefficient which acts to stabilize the pack.Comment: 12 pages, 10 figure
Relativistic nature of a magnetoelectric modulus of Cr_2O_3-crystals: a new 4-dimensional pseudoscalar and its measurement
Earlier, the magnetoelectric effect of chromium sesquioxide Cr_2O_3 has been
determined experimentally as a function of temperature. One measures the
electric field-induced magnetization on Cr_2O_3 crystals or the magnetic
field-induced polarization. From the magnetoelectric moduli of Cr_2O_3 we
extract a 4-dimensional relativistic invariant pseudoscalar
. It is temperature dependent and of the order of
10^{-4}/Z_0, with Z_0 as vacuum impedance. We show that the new pseudoscalar is
odd under parity transformation and odd under time inversion. Moreover,
is for Cr_2O_3 what Tellegen's gyrator is for two port
theory, the axion field for axion electrodynamics, and the PEMC (perfect
electromagnetic conductor) for electrical engineering.Comment: Revtex, 36 pages, 9 figures (submitted in low resolution, better
quality figures are available from the authors
Quantum critical behavior in the heavy Fermion single crystal Ce(NiPd)Ge
We have performed magnetic susceptibility, specific heat, resistivity, and
inelastic neutron scattering measurements on a single crystal of the heavy
Fermion compound Ce(NiPd)Ge, which is believed to
be close to a quantum critical point (QCP) at T = 0. At lowest
temperature(1.8-3.5 K), the magnetic susceptibility behaves as with m/mole
(0.0025 emu/mole). For 1 K, the specific heat can be fit to the formula
with of order 700 mJ/mole-K.
The resistivity behaves as for temperatures below 2
K. This low temperature behavior for and is in accord
with the SCR theory of Moriya and Takimoto\cite{Moriya}. The inelastic neutron
scattering spectra show a broad peak near 1.5 meV that appears to be
independent of ; we interpret this as Kondo scattering with 17 K. In
addition, the scattering is enhanced near =(1/2, 1/2, 0) with maximum
scattering at = 0.45 meV; we interpret this as scattering from
antiferromagnetic fluctuations near the antiferromagnetic QCP.Comment: to be published in J. Phys: Conference Serie
Rol de los sistemas de producción de aves y cerdos de traspatio en la emergencia y mantención de patógenos zoonóticos en Chile
En Chile la producción de aves y cerdos se concentra en unidades de producción industrial con altosestándares de productividad, calidad y bioseguridad. Este sector industrial concentra más del 85% de laspoblaciones de aves y cerdos en el país.Sin embargo, existen otras formas de producción animal. Una de ellas está en manos de pequeñosproductores, y se denomina como "producción animal de traspatio", que en Chile estaría representada pormás de 150 mil productores, 3,7 millones de aves y 400 mil cerdos.Los sistemas de producción animal de traspatio (SPT) son considerados como la forma de producción animalmás común a nivel mundial. Además, se reconoce que la mantención de estas unidades productivas juega unrol relevante para subsistencia de pequeños agricultores y su grupo familiar, siendo principalmente uncomplemento a las fuentes de alimentación que generan recursos económicos esporádicos. Sin embargo, segeneraliza a estas unidades productivas como poseedoras de severas deficiencias en bioseguridad
Multivariate analysis of Vitis subgenus Vitis seed morphology
We studied 142 grapevine seed samples belonging to 5 Vitis species, 92 cultivars of Vitis vinifera, 12 feral/wild populations and 4 hybrid rootstock cultivars. Eleven different characters from the seed and one allometric index have been used. Seeds show a wide range of variation in body dimensions, and in other parameters. Two largely differentiated clusters were obtained. Coincidences with previous seed classifications are discussed. Wild extra-European species have smaller seeds. The index breadth/length (STUMMER’s index) doesn’t allow to separate wild grapevines and cultivars. It defines, however, the “wild syndrome” values above 0.8 corresponding to wild extra-European Vitis species, occasionally used as rootstocks. Ferals/wild individuals tend to display smaller berries and plumper pips than their cultivated relatives therefore “looking wild”. The multivariate analysis place together ferals/wild and related cultivars in their respective clusters and does not discriminate a cluster of wild European grapevine.
Parasitosis en el proventrículo por Procyrnea sp. (Spiruroidea: Habronematidae), de un aguililla caminera (Rupornis magnirostris) del estado de Veracruz, México: reporte de un caso
The report presented herein describes the necropsy findings (red nodules over the linning of the proventriculus) in an adult female roadside hawk (Rupornis magnirostris) found in Veracruz State, Mexico. We further provide the description of a nematode from the genus Procyrnea found in the proventriculus wall including histopathological sections of tissue damage associated with the parasite.The report presented herein describes the necropsy findings (red nodules over the linning of the proventriculus) in an adult female roadside hawk (Rupornis magnirostris) found in Veracruz State, Mexico. We further provide the description of a nematode from the genus Procyrnea found in the proventriculus wall including histopathological sections of tissue damage associated with the parasite
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