Konstantinos Papadakis, piano, February 21, 2017

This is the concert program of the Konstantinos Papadakis, piano performance on Tuesday, February 21, 2017 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were Two Legends, S. 175 by Franz Liszt, Venice and Naples, S. 162 by F. Liszt, Sonata in F major, K. 445 by Domenico Scarlatti, Sonata in B-flat minor, K. 128 by D. Scarlatti, Sonata in E-flat major, K. 371 by D. Scarlatti, ROAI III (Dataflow) by Minas Borboudakis, "Schatz-Walzer" ("Treasure Waltz" from "Der Zigeunerbaron") by Johann Strauss Jr., and "Du und Du" ("You and You" from "Die Fledermaus" by J. Strauss Jr.. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Improving the precision of genotype selection in wheat performance trials

The aim of this study was to verify whether using the Papadakis method improves model assumptions and experimental accuracy in field trials used to determine grain yield for wheat lineages indifferent Value for Cultivation and Use (VCU) regions. Grain yield data from 572 field trials at 31 locations in the VCU Regions 1, 2, 3 and 4 in 2007-2011 were used. Each trial was run with and without the use of the Papadakis method. The Papadakis method improved the indices of experimental precision measures and reduced the number of experimental repetitions required to predict grain yield performance among the wheat genotypes. There were differences among the wheat adaptation regions in terms of the efficiency of the Papadakis method, the adjustment coefficient of the genotype averages and the increases in the selective accuracy of grain yield

Precisão experimental na predição de valores genéticos de progênies de arroz.

O objetivo deste trabalho foi comparar a eficiência do método de Papadakis, na correção da variação ambiental, com os delineamentos em blocos ao acaso e látice

Reliability-based analysis of recycled aggregate concrete under carbonation

Durability represents a crucial issue for evaluating safety and serviceability of reinforced concrete structures. Many studies have already focused on carbonation-induced corrosion of natural aggregate concrete (NAC) structures, leading to several prediction models to estimate carbonation depth. Less research is devoted instead on recycled aggregate concrete (RAC), about which limited experimental works exist aimed at assessing the carbonation coefficient in accelerated tests. Additionally, deteriorating processes are subject to uncertainty, when defining materials, geometry, and environmental actions during the service life of structures. This work presents a reliability-based analysis of carbonation resistance of RACs, using experimental carbonation coefficients derived from the literature, and applied in the full-probabilistic method prosed in fib Bulletin 34. Results demonstrate how aggregates replacement ratio and w/c ratio influence the reliability of RAC carbonation resistance

The scaling of the X-ray variability with black hole mass in AGN

The relation between the 2-10 keV, long term, excess variance and AGN black hole mass is considered in this work. A significant anti-correlation is found between these two quantities in the sense that the excess variance decreases with increasing black hole mass. This anti-correlation is consistent with the hypothesis that the 2-10 keV power spectrum in AGN follows a power law of slope -2 at high frequencies. It then flattens to a slope of -1 below a break frequency until a second break frequency below which it flattens to a slope of zero. The ratio of the two break frequencies is equal to 10-30, similar to the ratio of the respective frequencies in Cyg X-1. The power spectrum amplitude in the "frequency x power" space does not depend on black hole mass. Instead it is roughly equal to 0.02 in all objects. The high frequency break decreases with increasing black hole mass according to the relation 1.5x(10^-6)/(BHmass/(10^7) solar masses) Hz, in the case of "classical" Seyfert 1 galaxies. The excess variance of NGC4051, a Narrow Line Seyfert 1 object, is larger than what is expected for its black hole mass and X-ray luminosity. This can be explained if its high frequency break is 20 times larger than the value expected in the case of a "classical" Seyfert 1 with the same black hole mass. Finally, the excess variance vs X-ray luminosity correlation is a byproduct of the excess variance vs black hole mass correlation, with AGN accreting at ~ 0.1-0.15 the Eddington limit. These results are consistent with recent results from the power spectral analysis of AGN.Comment: 7 pages, 3 figures, accepted for publication in MNRA

Faculty concert: Lynn Chang, violin, Peter Zazofsky, violin, Raphael Hillyer, viola, Iseut Chaut, cello, Andrés Díaz, cello with student guests Konstantinos Papadakis, piano and Shoshana Telner, piano, March 19, 1998

This is the concert program of the Faculty Concert: Lynn Chang, violin, Peter Zazofsky, violin, Raphael Hillyer, viola, Iseut Chaut, cello, Andrés Díaz, cello with student guests Konstantinos Papadakis, piano and Shoshana Telner, piano performance on Thursday, March 19, 1998 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue. Works performed were Duo in G major for Violin and Viola, K. 423 by Wolfgang Amadeus Mozart, With Two Eyeglasses Obligato in E-flat major, WoO 32 by Ludwig van Beethoven, Suite for Two Cellos and Piano by Gian Carlo Menotti, Sonata for Violin and Cello by Maurice Ravel, and Suite in G minor for Two Violins and Piano, Op. 71 by Moritz Moszkowski. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund