Erie County as a Metro-Wide School District

Studies show that the quality of a child’s education is largely dependent on her family’s wealth, race, and residence. When a child living in deep poverty is educated in a poor school district, she has little exposure to the opportunities and experiences enjoyed by children in wealthier districts. Metro-wide school districts attempt to equalize educational opportunities for all students, raise regional academic achievement levels, and generate better relations across economic, ethnic, and racial lines. These districts often form by consolidating urban and suburban school districts within a region into one centralized unit, often on a county-wide scale

Network depth: identifying median and contours in complex networks

Centrality descriptors are widely used to rank nodes according to specific concept(s) of importance. Despite the large number of centrality measures available nowadays, it is still poorly understood how to identify the node which can be considered as the `centre' of a complex network. In fact, this problem corresponds to finding the median of a complex network. The median is a non-parametric and robust estimator of the location parameter of a probability distribution. In this work, we present the most natural generalisation of the concept of median to the realm of complex networks, discussing its advantages for defining the centre of the system and percentiles around that centre. To this aim, we introduce a new statistical data depth and we apply it to networks embedded in a geometric space induced by different metrics. The application of our framework to empirical networks allows us to identify median nodes which are socially or biologically relevant

Robust Estimation of the Generalized Loggamma Model. The R Package robustloggamma

robustloggamma is an R package for robust estimation and inference in the generalized loggamma model. We briefly introduce the model, the estimation procedures and the computational algorithms. Then, we illustrate the use of the package with the help of a real data set.Comment: Accepted in Journal of Statistical Softwar

Measurement of the W, Z and photon production in lead-lead collisions at sqrt(s_NN) = 2.76 TeV with the ATLAS detector

The ATLAS experiment measures yields of isolated photons and of Z and W bosons via leptonic decay modes in Pb+Pb collisions at sqrt(s_NN)=2.76 TeV. The data samples used in the analysis were obtained in the year 2010 and year 2011 LHC runs and correspond to 5 ub-1 and 0.15 nb-1 of integrated luminosity respectively. The measured yields of all bosons are consistent with the scaling proportional to the number of nucleon-nucleon collisions. The transverse momentum distributions are measured for isolated photons and for Z bosons for different centrality bins. The shapes of measured distributions do not change with centrality. The transverse momentum and rapidity distributions of Z boson are consistent in shape with Pythia model and the second harmonic coefficient of the azimuthal distribution of Z bosons with respect to the event plane is consistent with zero.Comment: 8 pages 5 figur