153,880 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Risk factors for eventful outcomes following skin-sparing mastectomy and immediate prosthetic reconstruction
No full textDispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A questão do financiamento de longo prazo no Brasil: uma revisão histórica
No full textTCC (graduação) - Universidade Federal de Santa Catarina. Centro Sócio-Econômico. Economia.No processo de crescimento econômico, principalmente em economias emergentes que necessitam desenvolver o setor de infra-estrutura, o financiamento de longo prazo constitui um mecanismo fundamental para a viabilização de investimentos. A falta de mecanismos internos eficazes de financiamento privado de longo prazo dentro do Sistema Financeiro, ao longo da história, impôs barreiras em relação ao crescimento econômico do Brasil. O baixo crescimento econômico do nosso país durante muitas décadas resulta, em grande parte, de um sistema financeiro subdesenvolvido com claras deficiências no que se refere ao mercado de capitais e ao sistema bancário privado como elementos de suporte para as empresas realizarem seus investimentos. Este trabalho busca analisar o modelo de financiamento adotado no Brasil no século XX, além do papel atual do sistema financeiro doméstico na oferta de crédito privado
Gamma-ray bursts within fireshell model
No full textThis thesis is mainly focused on careful data analysis of different parts of high-energy (sub-keV--GeV) spectra of gamma-ray bursts. All the interpretation works are based on the theoretical ground of the fireshell paradigm which is being continuously developed for over 20 years.
The chapters in the main body of the thesis focus on current research and results obtained and published. A distinct emphasis on spectral bands is expressed through structural division of the thesis: soft gamma-ray emission, x-ray afterglow emission and high-energy gamma-ray emission.
In Chapter 2 we discuss theoretical and observational evidences which have been recently gained for a two-fold classification of short bursts within the fireshell working paradigm. We present three additional S-GRBs, 081024B, 090510 and 140402A, following the already identified S-GRBs, i.e., 090227B and 140619B.
In Chapter 3 we analyze the early X-ray flares in the GRB "flare-plateau-afterglow" (FPA) phase observed by Swift-XRT. We claim that the FPA occurs only in one of the subclasses---binary-driven hypernovae (BdHNe). This subclass consists of long GRBs with a carbon-oxygen core (CO_core) massive star and a neutron star (NS) binary companion as progenitors.
In Chapter 4 we examine a scenario when in binary system of neutron star (NS) and massive CO_core star, the latter undergoes a supernova (SN) explosion. A black hole (BH) subsequently originates from the gravitational collapse of the NS caused by hypercritical accretion of the SN ejecta. We infer a new asymmetric morphology for the BdHNe system where the GeV emission occurs within a cone of half-opening angle approximately 60 degrees normal to the orbital plane of the binary progenitor. We confirm that GeV luminosity light curves follow the universal power-law with index of -1.19 +/- 0.04, and from this we further estimate the spin-down rate of the BH
Division, définition et démonstration dans la dialectique et la rhétorique selon Hermias d’Alexandrie. In: (a cura di): Gourinat J-B., Lemaire J., Logique et dialectique dans l’antiquité. PARIS:Librairie Philosophique J. Vrin 2016, pp. 383-396.
No full textDispositivo wireless Doppler per applicazioni biomedicali
No full textSistema per il monitoraggio in ecografia Dop-
pler di un organo e del flusso di un fluido corpo- reo di un paziente, comprendente
una sonda Doppler portabile (10) configurata per essere applicata sul corpo del paziente, in cui la sonda comprende una matrice di trasduttori (11), ciascun trasduttore essendo configurato per
- emettere in esercizio un rispettivo segnale a ultrasuoni di uscita diretto verso il corpo del pa- ziente,
- ricevere un rispettivo segnale a ultrasuoni di ingresso riflesso dal corpo del paziente, e
- convertire il segnale a ultrasuoni di ingresso in un segnale di lettura, e
un’unità principale di rilevazione (20) confi- gurata per
- comunicare in maniera wireless con la sonda portabile (10), e
- costruire un’immagine di una superficie biolo- gica riflettente secondo le caratteristiche delle onde ultrasoniche riflesse,
- individuare un fluido corporeo in movimento e calcolare la sua velocità e la sua direzione sulla base dei segnali di lettura forniti dalla matrice di trasduttori (11)
L'Egitto dei Flavi. Sintesi e prospettive d'indagine alla luce della documentazione papirologica ed epigrafica egiziana
No full textLambda-adic modular symbols over totally real fields
No full textWe consider a Hida family of nearly ordinary cusp forms on a quaternion algebra defined over a totally real number field. The aim of this work is to construct a cohomology class with coefficients in a p-adic sheaf over an Iwasawa algebra that can be specialized to cohomology classes attached to classical cusp forms in the given Hida family. Our result extends the work of Greenberg and Stevens on modular symbols attached to ordinary Hida families when the ground field is the field of rational numbers
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