2,225 research outputs found
Producción científica y visibilidad de los investigadores de la Universidad Carlos III de Madrid en las bases de datos del ISI, 1997-2003
No full textLos objetivos planteados en esta tesis son conocer los hábitos de publicación de los investigadores adscritos a un conjunto de áreas/departamentos de la UC3M, durante el período 1997-2003, en las bases de datos del Institute for Scientific Information (ISI), identificando la calidad de las publicaciones recogidas (documentos propios y citas recibidas), medida ésta en términos de impacto y visibilidad, y relacionando esta calidad con los hábitos de publicación obtenidos.
La metodología utilizada en el trabajo ha requerido la aplicación conjunta de técnicas estadísticas (univariantes, bivariantes y multivariantes), y del análisis de redes sociales, para la construcción de indicadores bibliométricos unidimensionales y multidimensionales, tanto de la producción científica identificada como de las citas recibidas por la misma.
Entre las conclusiones del estudio destaca que tanto la producción como las citas recibidas en todas las áreas/departamentos analizados tienen una tendencia ascendente, que los trabajos se realizan habitualmente en colaboración, así como que las temáticas con mayor producción son Física y Matemáticas, que gran parte de la investigación se publica en revistas situadas en el primer cuartil del Journal Citation Reports (JCR), y que esta actividad investigadora recibe normalmente citas de revistas con igual o mejor posición en el JCR en función de su Factor de Impacto
Research in economics in Spain: rankings of institutions and authors
No full textIn this paper we analyse the research in Economics in Spain during the 1990s considering the contributions of both Spanish and foreign economist who have worked in Spain during that period. To do so, we use different bibliometric indicators in order to elaborate rankings for both institutions and researchers. These rankings can be useful for several potentials users such as: a) Evaluation Agencies and Funding Bodies to help them in grant-allocation decisions; b) Graduate students who whish to choose the right institution to complete their postgraduate education, and c) Young Ph Ds who have entered the academic job market and need information about the research perfomance of different institutions
Culture, Constructivism, and Media: Designing a Module on Carlos Slim
No full textMexican tycoon Carlos Slim Helú has been a fixture on Forbes’s list of billionaires since 1991, and for the past three years, he has topped the magazine’s list of the world’s richest men. Although he is exceptionally well-known in his native Mexico, the majority of American college students have never heard of Carlos Slim. This article presents a curricular module built around this charismatic and controversial figure. The module requires students to navigate Internet-supported news media in the target language (Spanish), and engages them in independent, small-group, and larger, teacher-led activities designed to foster critical and comparative skills in cultural competency and analysis through process-based, student-led inquiry. Pedagogically and methodologically, the author engages with the recommendations and conclusions of recent studies by ACTFL and MLA committees, as well as by other leading scholars, regarding both the use of technology in the classroom and the idea of “teaching culture.” The unit’s content significantly deepens and enriches students’ understanding of social, economic, and political issues in modern Mexico. The article carefully situates each stage and aspect of the curricular unit presented in relation to recent studies of constructivism in foreign language acquisition and on the hierarchy of Bloom’s taxonomy of learning objectives
Hundreds of variants clustered in genomic loci and biological pathways affect human height
No full textMost common human traits and diseases have a polygenic pattern of inheritance: DNA sequence variants at many genetic loci influence the phenotype. Genome-wide association (GWA) studies have identified more than 600 variants associated with human traits(1), but these typically explain small fractions of phenotypic variation, raising questions about the use of further studies. Here, using 183,727 individuals, we show that hundreds of genetic variants, in at least 180 loci, influence adult height, a highly heritable and classic polygenic trait(2,3). The large number of loci reveals patterns with important implications for genetic studies of common human diseases and traits. First, the 180 loci are not random, but instead are enriched for genes that are connected in biological pathways (P = 0.016) and that underlie skeletal growth defects (P<0.001). Second, the likely causal gene is often located near the most strongly associated variant: in 13 of 21 loci containing a known skeletal growth gene, that gene was closest to the associated variant. Third, at least 19 loci have multiple independently associated variants, suggesting that allelic heterogeneity is a frequent feature of polygenic traits, that comprehensive explorations of already-discovered loci should discover additional variants and that an appreciable fraction of associated loci may have been identified. Fourth, associated variants are enriched for likely functional effects on genes, being over-represented among variants that alter amino-acid structure of proteins and expression levels of nearby genes. Our data explain approximately 10% of the phenotypic variation in height, and we estimate that unidentified common variants of similar effect sizes would increase this figure to approximately 16% of phenotypic variation (approximately 20% of heritable variation). Although additional approaches are needed to dissect the genetic architecture of polygenic human traits fully, our findings indicate that GWA studies can identify large numbers of loci that implicate biologically relevant genes and pathways
Strongly Minimal Self-Conjugate Linearizations for Polynomial and Rational Matrices
No full textFunding Information: Funding: This work is part of the "Proyecto de I+D+i PID2019-106362GB-I00 financiado por MCIN/AEI/10.13039/501100011033." This work has been also funded by "Ministerio de Economía, Industria y Competitividad (MINECO)" of Spain through grant MTM2017-90682-REDT and by the Madrid Government (Comunidad de Madrid-Spain) under the Multiannual Agreement with UC3M in the line of Excellence of University Professors (EPUC3M23), in the V PRICIT (Regional Programme of Research and Technological Innovation). The second author was funded by the "contrato predoctoral" BES-2016-076744 of MINECO and by an Academy of Finland grant (Suomen Akatemian päätös 331240). This work was partially developed while the third author held a "Chair of Excellence UC3M - Banco de Santander" at Universidad Carlos III de Madrid in the academic year 2019-2020. Funding Information: \ast Received by the editors October 18, 2021; accepted for publication (in revised form) March 8, 2022; published electronically August 16, 2022. The results of this paper are included in Chapter 8 of the second author's Ph.D. thesis defended in September 28, 2021 at Universidad Carlos III de Madrid. https://doi.org/10.1137/21M1453542 Funding: This work is part of the ``Proyecto de I+D+i PID2019-106362GB-I00 financiado por MCIN/AEI/10.13039/501100011033."" This work has been also funded by ``Ministerio de Econom\{\i'}a, Industria y Competitividad (MINECO)"" of Spain through grant MTM2017-90682-REDT and by the Madrid Government (Comunidad de Madrid-Spain) under the Multiannual Agreement with UC3M in the line of Excellence of University Professors (EPUC3M23), in the V PRICIT (Regional Programme of Research and Technological Innovation). The second author was funded by the ``contrato predoctoral"" BES-2016-076744 of MINECO and by an Academy of Finland grant (Suomen Akatemian pa\"a\"t\o"s 331240). This work was partially developed while the third author held a ``Chair of Excellence UC3M - Banco de Santander"" at Universidad Carlos III de Madrid in the academic year 2019--2020. Publisher Copyright: © 2022 Society for Industrial and Applied Mathematics.We prove that we can always construct strongly minimal linearizations of an arbitrary rational matrix from its Laurent expansion around the point at infinity, which happens to be the case for polynomial matrices expressed in the monomial basis. If the rational matrix has a particular self-conjugate structure, we show how to construct strongly minimal linearizations that preserve it. The structures that are considered are the Hermitian and skew-Hermitian rational matrices with respect to the real line, and the para-Hermitian and para-skew-Hermitian matrices with respect to the imaginary axis. We pay special attention to the construction of strongly minimal linearizations for the particular case of structured polynomial matrices. The proposed constructions lead to efficient numerical algorithms for constructing strongly minimal linearizations. The fact that they are valid for any rational matrix is an improvement on any other previous approach for constructing other classes of structure preserving linearizations, which are not valid for any structured rational or polynomial matrix. The use of the recent concept of strongly minimal linearization is the key for getting such generality. Strongly minimal linearizations are Rosenbrock's polynomial system matrices of the given rational matrix, but with a quadruple of linear polynomial matrices (i.e., pencils): L(λ): = [A(λ)/C(λ) -B(λ)/D(λ)], where A(λ) is regular, and the pencils [A(λ) -B(λ)] and A(λ)/C(λ)] have no finite or infinite eigenvalues. Strongly minimal linearizations contain the complete information about the zeros, poles, and minimal indices of the rational matrix and allow one to very easily recover its eigenvectors and minimal bases. Thus, they can be combined with algorithms for the generalized eigenvalue problem for computing the complete spectral information of the rational matrix.Peer reviewe
Correction: Allogeneic haematopoietic cell transplantation for myelofibrosis: proposed definitions and management strategies for graft failure, poor graft function and relapse: best practice recommendations of the EBMT Chronic Malignancies Working Party (Leukemia, (2021), 35, 9, (2445-2459), 10.1038/s41375-021-01294-2)
No full textDuring the Editorial process, the author name of Juan Carlos Hernández-Boluda to Hernández Boluda. The original article was updated to correct this
RO U T I N G H O M E W I T H C A R L O S B U N G A
No full textTo coincide with Angolan-Portugese artist's largest exhibition to date, entitled Habitar a Contradição (Inhabit the Contradiction), the exhibition, curated by Rui Mateus Amaral, artistic director of the Museum of Contemporary Art Toronto (MOCA), originates from one of Bunga's surrealist drawings—A Minha Primeira Casa Foi Uma Mulher 1975 (My First House Was a Woman 1975) (2018)—which evokes the journey of the artist's mother, pregnant, from Angola to Portugal in 1975, fleeing the civil war to save her two-year-old daughter and her unborn son.
The closing essay, "Routing Home with Carlos Bunga" uses the epistolary form as a means to convey both the author and artist's interior psychological states. To challenge hegemonic concepts of nomadism; to embrace the aesthetic possibilities of wandering, even in instances of longing for a site of belonging
Correction: ER+ breast cancers resistant to prolonged neoadjuvant letrozole exhibit an E2F4 transcriptional program sensitive to CDK4/6 inhibitors (Clinical Cancer Research (2018) 24 (2517–29) DOI: 10.1158/1078-0432.CCR-17-2904)
No full textIn the original version of this article (1), the stated disclosure of the author Carlos L. Arteaga is incorrect. The error has been corrected in the latest online HTML and PDF versions of the article. The authors regret this error
Range Unit Root (RUR) Tests: Robust against Nonlinearities, Error Distributions, Structural Breaks and Outliers
No full textSince the seminal paper by Dickey and Fuller in 1979, unit-root tests have conditioned the standard approaches to analysing time series with strong serial dependence in mean behaviour, the focus being placed on the detection of eventual unit roots in an autoregressive model fitted to the series. In this paper, we propose a completely different method to test for the type of long-wave patterns observed not only in unit-root time series but also in series following more complex data-generating mechanisms. To this end, our testing device analyses the unit-root persistence exhibited by the data while imposing very few constraints on the generating mechanism. We call our device the range unit-root (RUR) test since it is constructed from the running ranges of the series from which we derive its limit distribution. These nonparametric statistics endow the test with a number of desirable properties, the invariance to monotonic transformations of the series and the robustness to the presence of important parameter shifts. Moreover, the RUR test outperforms the power of standard unit-root tests on near-unit-root stationary time series; it is invariant with respect to the innovations distribution and asymptotically immune to noise. An extension of the RUR test, called the forward?backward range unit-root (FB-RUR) improves the check in the presence of additive outliers. Finally, we illustrate the performances of both range tests and their discrepancies with the Dickey?Fuller unit-root test on exchange rate series.Publicad
Les pratiques de gouvernance comme facteur de l’émergence d’une culture d’agilité organisationnelle au sein des entreprises publiques du Bénin
No full textCe travail de recherche vise à déterminer les pratiques de gouvernance favorisant l’émergence d’une culture d’agilité organisationnelle. Une méthodologie quantitative a été adoptée en se basant sur un échantillon de 360 constitué de tous les individus employés au sein des entreprises publiques du Bénin. Les données collectées ont été soumises à des analyses factorielles exploratoires et confirmatoires, à l’aide du logiciel SPSS 27. Les résultats montrent que les normes et responsabilité affectent positivement et significativement (β = 0,202 et P<0,001) l’agilité organisationnelle. La planification et suivi de performance affectent positivement (β = 0,480 et P<0,001) l’agilité organisationnelle. L’information et la prise de décision affectent positivement (β = 0,256 et P< 0,001) l’agilité organisationnelle. Le conseil d’administration affecte positivement (β = 0,305 et P<0,001) l’agilité organisationnelle. Ainsi, la gouvernance des entreprises publique influence significativement et positivement l’agilité organisationnelle des entreprises du Bénin
- …
