A precious metal alloy for construction of MR imaging-compatible balloon-expandable vascular stents

The authors developed ABI alloy, which mechanically resembles stainless steel 316. The main elements of ABI alloy are palladium and silver. Magnetic resonance (MR) images and radiographs of ABI alloy and stainless steel 316 stent models and of nitinol, tantalum, and Elgiloy stents were compared. ABI alloy showed the least MR imaging artifacts and was more radiopaque than stainless steel 316. ABI alloy has the potential to replace stainless steel 316 for construction of balloon-expandable MR imaging-compatible stents

Machine learning technique for morphological classification of galaxies at z<0.1 from the SDSS

Methods. We used different galaxy classification techniques: human labeling, multi-photometry diagrams, Naive Bayes, Logistic Regression, Support Vector Machine, Random Forest, k-Nearest Neighbors, and k-fold validation. Results. We present results of a binary automated morphological classification of galaxies conducted by human labeling, multiphotometry, and supervised Machine Learning methods. We applied its to the sample of galaxies from the SDSS DR9 with redshifts of 0.02 < z < 0.1 and absolute stellar magnitudes of 24m < Mr < 19.4m. To study the classifier, we used absolute magnitudes: Mu, Mg, Mr , Mi, Mz, Mu-Mr , Mg-Mi, Mu-Mg, Mr-Mz, and inverse concentration index to the center R50/R90. Using the Support vector machine classifier and the data on color indices, absolute magnitudes, inverse concentration index of galaxies with visual morphological types, we were able to classify 316 031 galaxies from the SDSS DR9 with unknown morphological types. Conclusions. The methods of Support Vector Machine and Random Forest with Scikit-learn machine learning in Python provide the highest accuracy for the binary galaxy morphological classification: 96.4% correctly classified (96.1% early E and 96.9% late L types) and 95.5% correctly classified (96.7% early E and 92.8% late L types), respectively. Applying the Support Vector Machine for the sample of 316 031 galaxies from the SDSS DR9 at z < 0.1, we found 141 211 E and 174 820 L types among them.Comment: 10 pages, 5 figures. The presentation of these results was given during the EWASS-2017, Symposium "Astroinformatics: From Big Data to Understanding the Universe at Large". It is vailable through \url{http://space.asu.cas.cz/~ewass17-soc/Presentations/S14/Dobrycheva_987.pdf

Synonymy of and remarks upon Tasmanian and other shells, with their geographical distribution

1. Helix (Pitys) gunnii. Helix (Pitys) assimilis, Brazier. Proc. Zool. Soc. London, 1871, p. 697. Helix (Pitys) assimilis, Brazier In Legrand's second edition of Catalogue Tasmanian Land Shells, August, 1871, sp. 66. Helix assimilis (Pitys). Pfr. in Monog. Hel. Viv. 1875; vol. Vn., p. 166. Hab., near Hobart Town; Mr. Petterd. I find that Mr. H. Adams described, in the Proc. Zool. Soc, 1866, p. 316, a Helix assimilis from Formosa. I have changed my specific name as above in honor of Mr. Ronald Gunn, whose exertions in the cause of science have made us acquainted with many new and rare specimens of natural history from Tasmania

Gender Equality and Reproductive Decision Making

In Evans, both the U.K. High Court and Court of Appeal upheld Howard Johnston’s right to refuse Natallie Evans access to the stored embryos which represented her only hope of having a child which was genetically her own. In this note, I focus on claims of gender (in)equality in the resolution of Evans. My argument is that such claims are often made all too easily, without full consideration of the problems of advancing them in the context of procreative decision-making, where men and women are inevitably differently situated. I conclude that although equality arguments are not wholly without value in this context, they need be used with extreme care. And, with due caution, I set out an equality argument of my own which was not made in Evans

The Cowl - v.25 - n.10 - Jan 09, 1963

The Cowl - student newspaper of Providence College. Volume 25, Number 10 - January 09, 1963. 10 pages