306,829 research outputs found
Saggio recensione di Apps & Rees (2009) e Todorova (2009)
No full textRecensione in chiave comparata dei recenti volumi di Apps & Rees (2009) e Todorova (2009) in tema di economia della famiglia e di genere.
Taxas de decaimento para a energia associada a um sistema semilinear de ondas elásticas em Rn com potencial do tipo dissipativo
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Matemática Pura e Aplicada, Florianópolis, 2013Neste trabalho estuda-se a existência e a unicidade de soluções globais do problema de valor inicial, associado ao sistema semilinear de ondas elásticas em um meio isotrópico, com uma não linearidade do tipo não absorvente. O coeficiente do termo dissipativo é um potencial não constante em Rn e estudam-se os casos quando esse potencial dissipativo é do tipo considerado crítico e não crítico. Taxas de decaimento da energia total também são estudadas para os casos linear e semilinear. A existência e o decaimento para o problema semilinear são obtidos mediante a hipótese de dados iniciais pequenos. Neste trabalho seguimos ideias de Charão-Ikehata [6] e de Ikehata-Todorova-Yordanov [10].Abstract : We study the existence and uniqueness of global solutions of the initial value problem associated to the semi-linear system of elastic waves in an isotropic medium with a nonlinearity of type nonabsorption. The coefficient of the dissipative term is non constant potential in Rn and we study the case where the potential type of damping is considered critical and noncritical. Decay rates of the total energy are also studied for linear and semi-linear system. The global existence and the asymptotic behavior of the semi-linear problem are obtained on the hypothesis of small initial data. In this work we fallow ideas of Charão-Ikehata [6] and Ikehata- Todorova-Yordanov [10]
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
Dispelling 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
Understanding the influence the socio-economic environment and social network mechanisms of self-management in Europe
No full textThe political and economic embedding of chronic illness management experiences: a comparison of lay accounts of people with diabetes in United Kingdom and Bulgaria
No full textMethods of protein delivery into mammalian cells for gene therapy and genetic studies
No full textAddress for correspondence:
R. Todorova
Institute of Biophysics
Bulgarian Academy of Sciences
1113 Sofia
Bulgaria
02 979-31-25
e-mail: [email protected], lying on different principles for introducing proteins into mammalian cells were compared in the present study. Some of them rely on non-covalent complex formation (Chariot), osmotic lysisis of pinocytic vesicles (Influx pinocytic cell-loading reagent), electric power (electroporation), lipid-based delivery system (Bioporter), microinjection, small protein transduction domains (PTDs) from viral proteins, bacterial secretion system type III (T3SS). Thus, the delivery by many of the compared methods can give a sufficient number of uniformly loaded cells for different studies including transcription and translation, cell cycle regulation, control of apoptosis, oncogenesis and gene therapy
От споделяне на знание към отворена наука=From sharing of knowledge to ореп science
No full textIп the рарег „From sharing of knowledge to ореп science'; Radostina Todorova, director of the Library of the New Bulgarian University, examines the ореп access to scientific information as а basis for developing the concept fог ореп science. The main types of ореп access аге presented, as well as а brief overview of the present situation in Bulgaria. The achievements in developing the
NBU Scholar Electronic Repository аге the focus in this рарег. NBU Library, as а university library, has а key role in providing ореп access to information and protecting fimdamental human rights
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
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