118,339 research outputs found
Donor/recipient sex mismatch and survival after heart transplantation: only an issue in male recipients? An analysis of the Spanish Heart Transplantation Registry
No full textMartinez-Selles, M., Almenar, L., Paniagua-Martin, M.J., Segovia, J., Delgado, J.F., Arizõn, J.M., Ayesta, A., Lage, E., Brossa, V., Manito, N., Pérez-Villa, F., Diaz-Molina, B., Rábago, G., Blasco-Peirõ, T., De La Fuente Galán, L., Pascual-Figal, D., Gonzalez-Vilchez, F
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
Convergent Disfocality and Nondisfocality Criteria for Second-Order Linear Differential Equations
No full textCopyright © 2013 Pedro Almenar and Lucas Jódar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.This paper presents a method to determine whether the second-order linear differential equation y(n) + q(x)y = 0 is either disfocal or nondisfocal in a fixed interval. The method is based on the recursive application of a linear operator to certain functions and yields upper and lower bounds for the distances between a zero and its adjacent critical points, which will be shown to converge to the exact values of such distances as the recursivity index grows.This work has been supported by the Spanish Ministry of Science and Innovation Project DPI2010-C02-01.Almenar, P.; Jódar Sánchez, LA. (2013). Convergent Disfocality and Nondisfocality Criteria for Second-Order Linear Differential Equations. Abstract and Applied Analysis. 2013:1-11. doi:10.1155/2013/987976S1112013Kwong, M. K. (1981). On Lyapunov’s inequality for disfocality. Journal of Mathematical Analysis and Applications, 83(2), 486-494. doi:10.1016/0022-247x(81)90137-2Kwong, M. K. (1999). Integral Inequalities for Second-Order Linear Oscillation. Mathematical Inequalities & Applications, (1), 55-71. doi:10.7153/mia-02-06Harris, B. . (1990). On an inequality of Lyapunov for disfocality. Journal of Mathematical Analysis and Applications, 146(2), 495-500. doi:10.1016/0022-247x(90)90319-bBrown, R. C., & Hinton, D. B. (1997). Proceedings of the American Mathematical Society, 125(04), 1123-1130. doi:10.1090/s0002-9939-97-03907-5Tipler, F. J. (1978). General relativity and conjugate ordinary differential equations. Journal of Differential Equations, 30(2), 165-174. doi:10.1016/0022-0396(78)90012-8Došlý, O. (1993). Conjugacy Criteria for Second Order Differential Equations. Rocky Mountain Journal of Mathematics, 23(3), 849-861. doi:10.1216/rmjm/1181072527Moore, R. (1955). The behavior of solutions of a linear differential equation of second order. Pacific Journal of Mathematics, 5(1), 125-145. doi:10.2140/pjm.1955.5.125Almenar, P., & Jódar, L. (2012). An upper bound for the distance between a zero and a critical point of a solution of a second order linear differential equation. Computers & Mathematics with Applications, 63(1), 310-317. doi:10.1016/j.camwa.2011.11.023Almenar, P., & Jódar, L. (2013). The Distribution of Zeroes and Critical Points of Solutions of a Second Order Half-Linear Differential Equation. Abstract and Applied Analysis, 2013, 1-6. doi:10.1155/2013/147192Bellman, R. (1943). The stability of solutions of linear differential equations. Duke Mathematical Journal, 10(4), 643-647. doi:10.1215/s0012-7094-43-01059-
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Impact of short-term mechanical circulatory support with extracorporeal devices on postoperative outcomes after emergency heart transplantation: Data from a multi-institutional Spanish cohort
No full textFunding for this study was supplied by the Instituto de Salud Carlos III, Spanish Ministry of Economy and Competitiveness, through the Red de Investigación CardiovascularBarge-Caballero, E., Almenar-Bonet, L., Villa-Arranz, A., Pérez-Villa, F., Segovia-Cubero, J., Delgado-Jiménez, J., González-Vilchez, F., Manito-Lorite, N., De-La-Fuente-Galán, L., Brossa-Loidi, V., Lambert-Rodríguez, J.L., Pascual-Figal, D., Lage-Gallé, E., Arizón-Del-Prado, J.M., Sanz-Julve, M., Muñiz-García, J., Crespo-Leiro, M
MIMO Equalization for Two-Mode Division Multiplexing over Standard SMF at 850 nm
No full text[EN] Multiple-input multiple-output (MIMO) receivers are proposed to cope with the signal distortion caused by modal coupling, induced by (de)multiplexers, and modal dispersion in mode-division multiplexing systems over single-mode fiber (SSMF) at 850 nm.This work was supported by the Spanish Ministerio de Economia y Competitividad under projects TEC2015 -70858 -C2 - 2 -R and TEC2015 -70858 -C2 - 1 -R, both with FEDER funds. The work of P. Medina was supported by the Formación de Personal Investigador grant program of the Universitat Politècnica de ValènciaMedina-Sevila, P.; Almenar Terre, V.; Corral, JL. (2017). MIMO Equalization for Two-Mode Division Multiplexing over Standard SMF at 850 nm. Optical Society of America (OSA). 1-3. https://doi.org/10.1364/SPPCOM.2017.SpM2F.2S13Tian, Z., Chen, C., & Plant, D. V. (2012). 850-nm VCSEL Transmission Over Standard Single-Mode Fiber Using Fiber Mode Filter. IEEE Photonics Technology Letters, 24(5), 368-370. doi:10.1109/lpt.2011.2179641Corral, J. L., Garcia-Rodriguez, D., & Llorente, R. (2016). Mode-Selective Couplers for Two-Mode Transmission at 850 nm in Standard SMF. IEEE Photonics Technology Letters, 28(4), 425-428. doi:10.1109/lpt.2015.2497080Li, J., Du, J., Ma, L., Li, M.-J., Jiang, S., Xu, X., & He, Z. (2017). Coupling analysis of non-circular-symmetric modes and design of orientation-insensitive few-mode fiber couplers. Optics Communications, 383, 42-49. doi:10.1016/j.optcom.2016.08.051Lozano, A., & Papadias, C. (2002). Layered space-time receivers for frequency-selective wireless channels. IEEE Transactions on Communications, 50(1), 65-73. doi:10.1109/26.97575
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
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
Sarah L. Blum Author Visit - Warrior Nurse: PTSD and Healing
No full textHear Sarah L. Blum, author of Women Under Fire: Abuse in the Military, discuss her newest book, Warrior Nurse: PTSD and Healing followed by a Q&A and book signing.
Sarah L. Blum is a decorated Vietnam veteran who served as an operating room nurse during the intense fighting of 1967. In recognition of her service, she was awarded the Army Commendation Medal.
Sponsored by CWU Veterans Center and CWU Libraries.https://digitalcommons.cwu.edu/libraryevents/1252/thumbnail.jp
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