We argue that the non-perturbative Schwinger mechanism may play an important role in the hadronic production of charm. We present a flux tube model which assumes that the colliding hadrons become color charged because of gluon exchange, and that a single non-elementary flux tube is built up as they recede. The strong chromoelectric field inside this tube creates quark pairs (including charmed ones) and the ensuing color screening breaks the tube into excited hadronic clusters. On their turn these clusters, or 'fireballs', decay statistically into the final hadrons. The model is able to account for the soft production of charmed, strange and lighter hadrons within a unified framework.
Classifying papers according to the fields of knowledge is critical to clearly understand the dynamics of scientific (sub)fields, their leading questions, and trends. Most studies rely on journal categories defined by popular databases such as WoS or Scopus, but some experts find that those categories may not correctly map the existing subfields nor identify the subfield of a specific article. This study addresses the classification problem using data from each paper (Abstract, Title, Keywords, and the KeyWords Plus) and the help of experts to identify the existing subfields and journals exclusive of each subfield. These “exclusive journals” are critical to obtain, through a pattern detection procedure that uses machine learning techniques (from software NVivo), a list of the frequent terms that are specific to each subfield. With that list of terms and with the help of optimization procedures, we can identify to which subfield each paper most likely belongs. This study can contribute to support scientific policy‐makers, funding, and research institutions—via more accurate academic performance evaluations—, to support editors in their tasks to redefine the scopes of journals, and to support popular databases in their processes of refining categories.
Este trabalho tem o objetivo de identificar os fatores decisivos para o aumento do nível de maturidade em gerenciamento de projetos das organizações. Exploramos o conhecimento e experiência de um núcleo de profissionais especializado, formado por docentes dos programas de pós-graduação em Gerenciamento de Projetos. Realizamos uma pesquisa qualitativa cujos resultados foram estruturados pela técnica de análise de conteúdo. Assim, as questões-chave relacionadas ao nível de maturidade puderam ser reveladas e categorizadas. Como resultado deste estudo, os fatores decisivos apontados com maior intensidade, para cada uma das categorias, são: (i) Pessoas: composição eficaz da equipe de projeto, liderança efetiva e habilidades comportamentais; (ii) Organização: cultura organizacional e patrocínio executivo; (iii) Processos e Tecnologia: metodologia, uso de melhores práticas e sistemas de apoio aos projetos; (iv) Negócios e Clientes: melhoria da competitividade. Com isso, podemos traçar uma estratégia que contribua para as organizações aumentarem o desempenho na gestão de seus projetos.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.