222 research outputs found
DAMEWARE - Data Mining & Exploration Web Application Resource
Astronomy is undergoing through a methodological revolution triggered by an
unprecedented wealth of complex and accurate data. DAMEWARE (DAta Mining &
Exploration Web Application and REsource) is a general purpose, Web-based,
Virtual Observatory compliant, distributed data mining framework specialized in
massive data sets exploration with machine learning methods. We present the
DAMEWARE (DAta Mining & Exploration Web Application REsource) which allows the
scientific community to perform data mining and exploratory experiments on
massive data sets, by using a simple web browser. DAMEWARE offers several tools
which can be seen as working environments where to choose data analysis
functionalities such as clustering, classification, regression, feature
extraction etc., together with models and algorithms.Comment: User Manual of the DAMEWARE Web Application, 51 page
DAMEWARE - Data Mining & Exploration Web Application Resource
Astronomy is undergoing through a methodological revolution triggered by an unprecedented wealth of complex and accurate data. DAMEWARE (DAta Mining & Exploration Web Application and REsource) is a general purpose, Web-based, Virtual Observatory compliant, distributed data mining framework specialized in massive data sets exploration with machine learning methods. We present the DAMEWARE (DAta Mining & Exploration Web Application REsource) which allows the scientific community to perform data mining and exploratory experiments on massive data sets, by using a simple web browser. DAMEWARE offers several tools which can be seen as working environments where to choose data analysis functionalities such as clustering, classification, regression, feature extraction etc., together with models and algorithms
CONVENTIONAL INTERNAL LIMITING MEMBRANE PEELING VERSUS INVERTED FLAP FOR SMALL-TO-MEDIUM IDIOPATHIC MACULAR HOLE: A Randomized Trial
Purpose: To compare conventional internal limiting membrane (ILM) peeling versus inverted flap technique in small-to-medium idiopathic macular hole.
Methods: Eyes with â€400 ÎŒ m idiopathic macular holes were randomized into the conventional ILM peeling group (25 eyes) and inverted flap group (25 eyes). A 12-month follow-up was considered. Macular sensitivity (MS) change detected with MP-1 microperimetry was the primary outcome. Secondary outcomes included best-corrected visual acuity change, closure rate, anatomical findings on optical coherence tomography such as U-shape foveal contour, restoration of external limiting membrane, and ellipsoid zone.
Results: In both groups, MS improved throughout the follow-up. Final MS was greater in the conventional ILM peeling group compared with the inverted flap group, being 16.6 ± 2.3 dB versus 14.9 ± 2.9 dB, respectively ( P = 0.026). In both groups best-corrected visual acuity improved throughout the follow-up, with a final best-corrected visual acuity of 0.19 ± 0.14 logMar (20/31 Snellen) in the conventional ILM group and 0.22 ± 0.11 logMar (20/33 Snellen) in the inverted flap group ( P = 0.398). Anatomical hole closure was achieved in all cases. No difference in optical coherence tomography findings was shown between the two groups.
Conclusion: A better final MS was found in eyes undergoing conventional ILM peeling. Inverted flap technique has disadvantages compared with conventional peeling for the treatment of small-to-medium idiopathic macular holes
A precise measurement of the nonâleptonic weak decay parameters α and Ï in the spin 3/2 decay ÏââÎ0+Kâ
Experiment E800 at Fermilab using the E800 spectrometer has made a precise measurement of the nonâleptonic weak decay parameters for the spin 3/2 decay, Ωââΰ+Kâ. The paratmeters determined are αΎαΩ=0.0126±0.0042, αΩ=0.0196±0.0066, and ÏÏ=â3.4°±10.3°. This measurement of αΩ is nearly four times more precise than the previous world average value of â0.026±0.026 and shows this parameter to be inconsistent with zero. Also, E800 has made the first measurement of ÏΩ. (AIP) © 1995 American Institute of Physics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87479/2/692_1.pd
A precision measurement of the 멉 magnetic moment
The structure of baryons can be probed at long range by measuring their magnetic moments. The particulary simple valence quark structure (three strange quarks with their spins aligned) of the Ωâ should make a precise measurments its magnetic moment a useful test of models of baryon structure. The only previous measurement of the Ωâ magnetic moment to a precision of 10%, could not clearly differentiate between these models. © 1995 American Institute of Physics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87480/2/478_1.pd
Association of neovascular age-related macular degeneration with month and season of birth in Italy
In order to investigate the influence of season and month of birth on the risk of neovascular age-related macular degeneration (n-AMD) in Italy, we evaluated the month birth and sex of all patients, recorded in the anti-vascular endothelial growth factor (VEGF) monitoring registry of the Italian Medicines Agency, born between 1925-1944, who received intravitreal anti-VEGF injections for n-AMD between January 1, 2013 and July 29, 2015. The numbers of all births in Italy in the same years, extracted from the Italian National Institute of Statistics, were used to calculate the expected number of n-AMD cases. Overall, 45,845 patients (19,207 men, 26,638 women) received intravitreal anti-VEGF for n-AMD; in the same years, 20,140,426 people (10,334,262 male, 9,806,164 female) were born in Italy. Comparing the observed number of n-AMD cases with the expected number of n- AMD cases in each season, we found that the season-specific risk for n-AMD was 2.5% higher for those born in summer (OR=1.03, Bonferroni-corrected P=0.008) and 3% lower for those born in winter (OR=0.96, Bonferroni-corrected P=0.0004). When considering the month of birth, the risk of n-AMD was 5.9% lower for people born in January (OR=0.93, Bonferroni-corrected P=0.0012). The factors causing such differences should be determined
Preliminary results from E756 on the Îâ and Ωâ magnetic moments
We have used the spin precession technique to measure the Îâ and Ωâ magnetic moments. The preliminary results are ÎŒ(Îâ)=â0.64±0.02 nuclear magnetons and ÎŒ(Ωâ)=â2.0±0.2 nuclear magnetons where the error for both measurements is statistical. The polarization of Îââs produced at 2.5 mr by 800 GeV protons on a Be target was 11% while the polarization of Ωââs was consistent with zero. Polarized Îââs and Ωââs were produced using spin transfer from a polarized neutral hyperon beam. The Ωâ polarization at 325 GeV/c was 6.5%.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87375/2/374_1.pd
Polarization and spin transfer of Ωâ and Îâ hyperons at 800 GeV
Fermilab experiment E756 has measured the polarization of Wâ hyperons produced by 800 GeV protons to be small compared to that of Îâ hyperons. When produced by a neutral beam containing polarized Î and Î0 hyperons, both the Ωâ and the Îâ have a significant polarization indicating a large spin transfer at high energies.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87380/2/80_1.pd
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