Measurements of charged-particle distributions with the ATLAS detector

Inclusive charged-particle measurements probe the low-energy region of the non-perturbative quantum chromodynamics. The ATLAS collaboration has recently measured the charged-particle multiplicity and its dependence on transverse momentum and pseudorapidity in special data sets with low LHC beam currents, recorded at centre-of-mass energies of 8 TeV and 13 TeV. The measurements at 8 TeV cover a wide spectrum using charged-particle selections with minimum transverse momentum of both 100 MeV and 500 MeV and in various phase space regions of low and high charged-particle multiplicities, some of which are studied for the first time by ATLAS. The measurements at 13 TeV also present detailed studies with a minimum transverse momentum of both 100 MeV and 500 MeV. The measurements are compared with predictions of various tuned Monte Carlo generators and are found to provide strong constraints on these. None of the Monte Carlo generators with their respective tunes are able to reproduce all the features of the data.Comment: Proceedings of Low-x Meeting 201

Decoding Hidden Markov Models Faster Than Viterbi Via Online Matrix-Vector (max, +)-Multiplication

In this paper, we present a novel algorithm for the maximum a posteriori decoding (MAPD) of time-homogeneous Hidden Markov Models (HMM), improving the worst-case running time of the classical Viterbi algorithm by a logarithmic factor. In our approach, we interpret the Viterbi algorithm as a repeated computation of matrix-vector $(\max, +)$-multiplications. On time-homogeneous HMMs, this computation is online: a matrix, known in advance, has to be multiplied with several vectors revealed one at a time. Our main contribution is an algorithm solving this version of matrix-vector $(\max,+)$-multiplication in subquadratic time, by performing a polynomial preprocessing of the matrix. Employing this fast multiplication algorithm, we solve the MAPD problem in $O(mn^2/ \log n)$ time for any time-homogeneous HMM of size $n$ and observation sequence of length $m$, with an extra polynomial preprocessing cost negligible for $m > n$. To the best of our knowledge, this is the first algorithm for the MAPD problem requiring subquadratic time per observation, under the only assumption -- usually verified in practice -- that the transition probability matrix does not change with time.Comment: AAAI 2016, to appea

Optimization of indirubin and indigo production in E.coli

The goal of this thesis is to determine the conditions that give the highest yield of indigo and indirubin in recombinant E.coli. This E.coli has been transformed with a P450 gene from woad, an indigo producing plant. The conditions investigated were the type of media, the amount of inducer, the presences of supplements, and the induction time. The techniques used during the experiments were liquid-liquid extraction using separatory funnels and centrifugation, rotary evaporation, UV-vis spectrophotometry, and thin layer chromatography. Thin layer chromatography showed that the products of the reaction are indigo and indirubin; UV-vis spectrophotometry was used to find the absorbance at different wavelengths, which were used to calculate the concentration of indigo and indirubin in each sample, and determine the conditions that gave the highest yield. These conditions were found to be TB for the medium, 40 µL of IPTG, the presence of supplements, and 96 hours for the induction time

Effects of Nostalgia on Responses to Negative Feedback

Nostalgia is a bittersweet emotion evoked by memories of cherished personal experiences. Though nostalgia is a self-focused emotion, it has many interpersonal effects as well. Feeling nostalgia increases feelings of social connectedness and self esteem, and may protect against negative effects of existential threat (Wildschut et al., 2006). However, less is known about the extent to which nostalgia relates to anger and aggression. We hypothesized that nostalgia would buffer against the effect of negative feedback on feelings of anger and motivation to aggress. Undergraduate students wrote about a nostalgic or objective memory, and then received negative feedback about another personal writing project. Participants reported their feelings of anger, then had the opportunity to punish the individual who gave them negative feedback by administering loud noise blasts in a competitive game. We discuss the results and real-world implications of these findings.https://scholarscompass.vcu.edu/uresposters/1283/thumbnail.jp

El retorno de la geopolítica: nuevos y viejos conflictos bélicos

Depto. de Historia, Teorías y Geografías PolíticasFac. de Ciencias Políticas y SociologíaTRUEpu

Vulcan’s Shield: Ekphrasis and Prophecy in Aeneid 8

El objetivo de este artículo es estudiar el escudo forjado por Vulcano (Eneida 8.617-731) tomando en consideración al mismo tiempo su carácter de profecía y el modo en que es representado mediante el procedimiento de la écfrasis. Se analizarán la disposición espacial de las viñetas y la vinculación de cada imagen con el centro, así como la capacidad de Eneas para comprender (o no) el contenido de la profecía acerca del futuro romano.The aim of this paper is to study the shield made by Vulcan (Aeneid 8.617- 731) considering both its prophetic character and the way it is conveyed through an ekphrasis. The spatial arrangement of the vignettes and the connection between each image with the center will be examined, together with Aeneas’ ability to understand the prophecy about the Roman future.Fil: Cairo, María Emilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Investigaciones en Humanidades y Ciencias Sociales; Argentina. Universidad Nacional de la Plata. Facultad de Humanidades y Cs.de la Educacion; Argentin

La Geopolítica como "ciencia del Estado": el mundo del general Haushofer

Depto. de Historia, Teorías y Geografías PolíticasFac. de Ciencias Políticas y SociologíaTRUEpu