Using multiple classifiers for predicting the risk of endovascular aortic aneurysm repair re-intervention through hybrid feature selection.

Feature selection is essential in medical area; however, its process becomes complicated with the presence of censoring which is the unique character of survival analysis. Most survival feature selection methods are based on Cox's proportional hazard model, though machine learning classifiers are preferred. They are less employed in survival analysis due to censoring which prevents them from directly being used to survival data. Among the few work that employed machine learning classifiers, partial logistic artificial neural network with auto-relevance determination is a well-known method that deals with censoring and perform feature selection for survival data. However, it depends on data replication to handle censoring which leads to unbalanced and biased prediction results especially in highly censored data. Other methods cannot deal with high censoring. Therefore, in this article, a new hybrid feature selection method is proposed which presents a solution to high level censoring. It combines support vector machine, neural network, and K-nearest neighbor classifiers using simple majority voting and a new weighted majority voting method based on survival metric to construct a multiple classifier system. The new hybrid feature selection process uses multiple classifier system as a wrapper method and merges it with iterated feature ranking filter method to further reduce features. Two endovascular aortic repair datasets containing 91% censored patients collected from two centers were used to construct a multicenter study to evaluate the performance of the proposed approach. The results showed the proposed technique outperformed individual classifiers and variable selection methods based on Cox's model such as Akaike and Bayesian information criterions and least absolute shrinkage and selector operator in p values of the log-rank test, sensitivity, and concordance index. This indicates that the proposed classifier is more powerful in correctly predicting the risk of re-intervention enabling doctor in selecting patients' future follow-up plan

Assessment of eating behaviour in obese children of Bangor city

Obesity is a major health problem for people living in the UK, and it currently affects many children. The objectives of this study is to assess the psychometric measures of eating behaviour associated with obesity in primary school-aged children in the city of Bangor (North Wales, UK). Across-sectional survey of children’s eating behaviours and their relationship to obesity was done in four primary schools in the city of Bangor (North Wales, UK).The study utilized the method of cross-sectional survey of Wales’s children’s eating behaviour in association with obesity using two groups of children aged 7–8 years and 10–11 years through four junior schools in Bangor. It was assessed using the Child Eating Behaviour Questionnaire (CEBQ) and body composition was estimated using BMIs. Total of 153 children 81 were boys and 72 were girls. The statistical analysis used is based on multiple regression analysis with the dependent or predicted variable being BMI and the independent or predictor variables being food responsiveness, emotional under eating and exercise.It was found that exercise was significant at p value< 0.042 and negatively associated with BMI, which means that there is a significant difference between exercise and BMI. Two behavioural characteristics derived from the CEBQ which are food responsiveness and emotional under-eating. This is statistically significant at p value <0.01 and positively associated with BMI, show that increase food responsiveness and emotional under-eating is different with increases of BMI.The psychometric measures of children’s eating styles obtained from CEBQ showed that exercise change as above, with BMI; that is children who were rated as having more exercise were more likely to have a lower BMI

Diffractive Contribution to the Elasticity and the Nucleonic Flux in the Atmosphere

We calculate the average elasticity considering non-diffractive and single diffractive interactions and perform an analysis of the cosmic-ray flux by means of an analytical solution for the nucleonic diffusion equation. We show that the diffractive contribution is important for the adequate description of the nucleonic and hadronic fluxes in the atmosphere.Comment: 10 pages, latex, 2 figures (uuencoded PostScript

Isospin Dependence in the Odd-Even Staggering of Nuclear Binding Energies

The FRS-ESR facility at GSI provides unique conditions for precision measurements of large areas on the nuclear mass surface in a single experiment. Values for masses of 604 neutron-deficient nuclides (30<=Z<=92) were obtained with a typical uncertainty of 30 microunits. The masses of 114 nuclides were determined for the first time. The odd-even staggering (OES) of nuclear masses was systematically investigated for isotopic chains between the proton shell closures at Z=50 and Z=82. The results were compared with predictions of modern nuclear models. The comparison revealed that the measured trend of OES is not reproduced by the theories fitted to masses only. The spectral pairing gaps extracted from models adjusted to both masses, and density related observables of nuclei agree better with the experimental data.Comment: Physics Review Letters 95 (2005) 042501 http://link.aps.org/abstract/PRL/v95/e04250

Assessment the knowledge of mothers ‘toward home accident among children less than five years in Polytechnic University of Sulaimani

Children accidents are an essential source of death and wounds among children during the first of life. Annually, millions of children are constantly becoming handicap or blemished because of mishaps.Objective: To assess knowledge of children mothers toward home accidents in polytechnic University of Sulaimani. Methodology: A simple random sample of (110) respondents were selected.. The data collected and composed during the utilization of a created questionnaire, with two parts; the first part assessed the knowledge of children mothers with (20) yes or no questions and the second part includes the mothers' demographic attributes. A pilot study was carried out for the period of December 18th to 28th 2015 in order to conclude the questionnaire accuracy during the use of (Test – Retest). A panel of (8) experts was include in the determination of the questionnaire content validity Data were analyzed through the application of descriptive statistical data analysis approach (frequency and percentage), and inferential data analysis approach (Mean of Scores).).The results of the study revealed, the mean age of the mothers was (1.86) years, (58.2%) of them had completed secondary school, (88.2%) of mothers have more than five children, (89.1%) of mother’s were in moderate socio-economic status, (47.3%) of mothers have personal reading information,(58.2) of the child were male,(13.6%) of mothers have knowledge about safe housing condition held in Maternal and Child Health Centers.The conclusion of this study revealed that, inadequate children mothers’ knowledge regarding home accidents among children less than six years held in Maternal and Child Health Centers during the antenatal period. So the recommendation are suggested, reinforces the need for effective education program via mass media, for mothers

Positron annihilation analysis of nanopores and growth mechanism of oblique angle evaporated TiO2 and SiO2 thin films and multilayers

The nano-porosity embedded into the tilted and separated nanocolumns characteristic of the microstructure of evaporated thin films at oblique angles has been critically assessed by various variants of the positron annihilation spectroscopy. This technique represents a powerful tool for the analysis of porosity, defects and internal interfaces of materials, and has been applied to different as-deposited SiO and TiO thin films as well as SiO/TiO multilayers prepared by electron beam evaporation at 70° and 85° zenithal angles. It is shown that, under same deposition conditions, the concentration of internal nano-pores in SiO is higher than in TiO nanocolumns, while the situation is closer to this latter in TiO/SiO multilayers. These features have been compared with the predictions of a Monte Carlo simulation of the film growth and explained by considering the influence of the chemical composition on the growth mechanism and, ultimately, on the structure of the films

Critical Role of Electrical Resistivity in Magnetoionics

The utility of electrical resistivity as an indicator of magnetoionic performance in stoichiometrically and structurally similar thin-film systems is demonstrated. A series of highly nanocrystalline cobalt nitride (Co-N) thin films (85 nm thick) with a broad range of electrical properties exhibit markedly different magnetoionic behaviors. Semiconducting, near stoichiometric CoN films show the best performance, better than their metallic and insulating counterparts. Resistivity reflects the interplay between atomic bonding, carrier localization, and structural defects, and in turn determines the strength and distribution of applied electric fields inside the actuated films. This fact, generally overlooked, reveals that resistivity can be used to quickly evaluate the potential of a system to exhibit optimal magnetoionic effects, while also opening interesting challenges.Financial support by the European Research Council (SPIN-PORICS 2014-Consolidator Grant, Agreement No. 648454, and the MAGIC-SWITCH 2019-Proof of Concept Grant, Agreement No. 875018), the Spanish Government (MAT2017-86357-C3-1-R and PID2020- 116844RB-C21), the Generalitat de Catalunya (2017- SGR-292 and 2018-LLAV-00032) and the European Regional Development Fund (MAT2017-86357-C3-1-R and 2018-LLAV-00032) is acknowledged. This work was partially supported by the Impulse-und Net-working fund of the Helmholtz Association (FKZ VH-VI-442 Memriox), and the Helmholtz Energy Materials Characterization Platform (03ET7015). The PALS measurements were carried out at ELBE at the Helmholtz-Zentrum DresdenRossendorf e. V., a member of the Helmholtz Association. L.A. thanks MINECO for a Ramón y Cajal Contract (RYC-2013-12640). J.S. thanks the Spanish Fábrica Nacional de Moneda y Timbre for fruitful discussions. E.M. acknowledges support as a Serra Húnter Fellow. We acknowledge service from MiNa Laboratory at IMNCSIC

Present and Future Experiments with Stored Exotic Nuclei at Relativistic Energies

Recent progress is presented from experiments on masses and lifetimes of bare and few-electron exotic nuclei at GSI.Comment: Proceedings of International Conference on "Frontiers in Nuclear Structure, Astrophysics and Reactions", Kos, Greece, September 12-17, 200