An extended formalism for preferential attachment in heterogeneous complex networks

In this paper we present a framework for the extension of the preferential attachment (PA) model to heterogeneous complex networks. We define a class of heterogeneous PA models, where node properties are described by fixed states in an arbitrary metric space, and introduce an affinity function that biases the attachment probabilities of links. We perform an analytical study of the stationary degree distributions in heterogeneous PA networks. We show that their degree densities exhibit a richer scaling behavior than their homogeneous counterparts, and that the power law scaling in the degree distribution is robust in presence of heterogeneity

Combining exclusive semi-leptonic and hadronic B decays to measure |V_ub|

The Cabibbo-Kobayashi-Maskawa matrix element |V_ub| can be extracted from the rate for the semi-leptonic decay B -> pi + l + antineutrino_l, with little theoretical uncertainty, provided the hadronic form factor for the B -> pi transition can be measured from some other B decay. In here, we suggest using the decay B -> pi J\psi. This is a color suppressed decay, and it cannot be properly described within the usual factorization approximation; we use instead a simple and very general phenomenological model for the b d J\psi vertex. In order to relate the hadronic form factors in the B -> pi J\psi and B -> pi + l + antineutrino_l decays, we use form factor relations that hold for heavy-to-light transitions at large recoil.Comment: Latex, 7 pages, no figure

GJR Volume 38 Number 1 Spring 2015

The Georgia Journal of Reading\u27s Spring 2015 issue includes: Message from the Editors by Dr. Christine A. Draper and Dr. Lina B. Soares (pg. 4) President’s Page by Dr. Beth Pendergraft (pg.5) . Middle School Literacy Coaches: Perceptions of Roles and Responsibilities by Dr. Katie Stover and Dr. Maryann Mraz (pg. 6) An Analysis of Teachers’ Discourse and Their Perceptions Concerning the Use of Questioning and Feedback During Reading Instruction In Third-Grade Classrooms by Dr. Marie Holbein and Dr. Jennifer Farist (pg. 15) Reading, Motivation, and the Power of Social Relationships: Learning from Middle School Students in a Title I Reading Classroom by Dr. Trevor Thomas Stewart and Dr. Emily Pendergrass (pg. 25) How Can Teachers Motivate Reluctant Readers? by Dr. Maggie Lehman (pg. 32) Dictionary Projects: A Defining Moment in Literacy by Beverly A. McKenna and Beverly A. Strauser (pg. 40)https://digitalcommons.kennesaw.edu/gjrarchive/1006/thumbnail.jp

Experimental Determination of Thermal Entanglement in Spin Clusters using Magnetic Susceptibility Measurements

The present work reports an experimental observation of thermal entanglement in a clusterized spin chain formed in the compound Na$_2$Cu$_5$Si$_4$O$_{14}$. The presence of entanglement was investigated through two measured quantities, an Entanglement Witness and the Entanglement of Formation, both derived from the magnetic susceptibility. It was found that pairwise entanglement exists below $\sim 200$ K. Tripartite entanglement was also observed below $\sim 240$ K. A theoretical study of entanglement evolution as a function of applied field and temperature is also presented.Comment: Submited to Phys. Rev.

Herança da resistência de variedades comerciais brasileiras de soja à podridão radicular de fitóftora.

O objetivo do estudo foi avaliar a herança da resistência à podridão radicular de fitóftora, causada por causada por Phytophthora sojae (Kaufm. & Gerd.), presentes em variedades comerciais resistentes BRS 260, BRS 262, BRS 246RR e BRSMG 752S. Até hoje 14 genes, denominados Rps, foram descritos por conferirem resistência à PRF, os quais tem sido amplamente utilizados nos programas de melhoramento para proteção das cultivares de soja. O material experimental foi desenvolvido a partir do cruzamento das quatro cultivares entre si, totalizando seis cruzamentos. A população F2, os parentais utilizados nos cruzamentos e a cultivar suscetível BRS 268, foram inoculados com o patógeno utilizando a metodologia de Keeling (1982), adaptada por Yorinori (1996). O teste do qui-quadrado (?2) foi aplicado para aceitar ou rejeitar os padrões de segregação encontrados de plantas mortas e não-mortas esperadas para a população F2 segundo padrões mendelianos. O cruzamento BRS 260 x BRS 246RR não resultou em nenhum indivíduo morto, com isso conclui-se que os mesmos contém um gene de resistência no mesmo loco conferindo resistência a P. sojae. Nos cruzamentos BRSMG 752S x BRS 260 e BRS 246RR x BRSMG 752S foram observados padrões de segregação semelhantes, correspondentes à segregação de dois genes dominantes independentes. As três combinações de cruzamentos envolvendo a cultivar BRS 262 indicam a presença de três genes segregando independentemente nesses cruzamentos. Pode-se concluir que apenas nesse grupo de quatro cultivares resistentes já existem quatro locos de resistência à P. sojae disponíveis para serem explorados em programas de melhoramento de soja

Empiricism and stochastics in cellular automaton modeling of urban land use dynamics

An increasing number of models for predicting land use change in regions of rapidurbanization are being proposed and built using ideas from cellular automata (CA)theory. Calibrating such models to real situations is highly problematic and to date,serious attention has not been focused on the estimation problem. In this paper, wepropose a structure for simulating urban change based on estimating land usetransitions using elementary probabilistic methods which draw their inspiration fromBayes' theory and the related ?weights of evidence? approach. These land use changeprobabilities drive a CA model ? DINAMICA ? conceived at the Center for RemoteSensing of the Federal University of Minas Gerais (CSR-UFMG). This is based on aneight cell Moore neighborhood approach implemented through empirical land useallocation algorithms. The model framework has been applied to a medium-size townin the west of São Paulo State, Bauru. We show how various socio-economic andinfrastructural factors can be combined using the weights of evidence approach whichenables us to predict the probability of changes between land use types in differentcells of the system. Different predictions for the town during the period 1979-1988were generated, and statistical validation was then conducted using a multipleresolution fitting procedure. These modeling experiments support the essential logicof adopting Bayesian empirical methods which synthesize various information aboutspatial infrastructure as the driver of urban land use change. This indicates therelevance of the approach for generating forecasts of growth for Brazilian citiesparticularly and for world-wide cities in general

Tillering of ‘Marandu’ \u3ci\u3eBrachiaria\u3c/i\u3e Under Different Nitrogen Rates in The Brazilian Savannah

The tiller is the basic unit of grass growth and tiller density determines the horizontal ground cover, leaves production and pastures perennially. The objective in this study was to quantify the number of aerial and basal tillers and basal:aerial tillers ratio in Urochloa brizantha cv. Marandu, established in Brazilian savannah, submitted to nitrogen doses (0, 50, 100 and 150 kg N/ha). The experiment was carried out in the Forage and Pasture Sector of Jataí Federal University (UFJ) and after soil correction and fertilization, plots were established with Marandu palisade grass in a randomized block design, with four replications and four N doses. Tiller count was performed after the uniformity cut and at the end of each cycle, when the average height of the forage canopy reached average 30 cm. Tillers were identified with colored wires (one color/generation), in a total of six generations (cycles). The highest ratio of basal:aerial tiller was 1.36 and occurred at dose of 100 kg N/ha as an answer to the highest tiller survival and lowest tiller mortality. Highest percentage of basal tiller and the lowest percentage of aerial tiller occurs at dose of 100 kg N/ha. Nitrogen fertilization is an important strategy to obtain more production of high quality mass, highest ground cover by highest survival rate, less mortality and a better proportion between basal and aerial tillers in Marandu palisade grass, favoring their perennity when is used 100 kg N/ha

Monitoramento do comportamento do rio Paraguai no Pantanal Sul-Mato-grossense-2008/2009.

Este trabalho visa dar continuidade ao programa de monitoramento do comportamento do rio Paraguai que é feito anualmente pela Embrapa Pantanal.bitstream/CPAP-2010/57313/1/COT80.pd