117,277 research outputs found
Chemical Detail Force Fields for Mesogenic Molecules
No full textIntra- and intermolecular potential energy surfaces of the 4,4'-di-n-heptyl azoxybenzene molecule have been sampled by ab initio calculations and represented through a force field suitable for classical bulk simulations. The parametrization of the molecular internal flexibility has been performed by a fitting procedure based on single molecule Hessian, gradients and torsional energies, computed using density functional theory. The intermolecular part of the force field has been derived as a pure pair potential, by fitting the dimer potential energy surface sampled by the Fragmentation Reconstruction Method. Preliminary molecular dynamics runs have been performed on systems of 210 and 600 molecules at atmospheric pressure and different temperatures, showing the presence of ordered and isotropic phases. Several properties have been computed, all resulting in a good agreement with the corresponding experimental data
Factibilidad de la obtención de ácido poliláctico partir de lactosuero
No full textEl lactosuero es un subproducto de la fabricación de quesos y manteca, y a causa del costo de inversiones, es habitualmente descartado sin tratamiento, o uso posterior, con el consiguiente riesgo ambiental. Este
artículo aborda el estudio de factibilidad de la obtención de ácido poliláctico (PLA), a partir de este lactosuero, como materia prima para impresiones 3D, hilos de sutura biodegradables, etc., teniendo en
cuenta que esto representa también un beneficio para el ambiente.
El estudio de mercado indicará la conveniencia de producir uno, otro, o una producción mixta, el PLA tiene dos formas, L(+) y D(-), siendo el isómero L(+), el biodegradable y metabolizado por el organismo
humano. La escala, inicialmente propuesta, es al nivel PyMEs y/o MiPyMEs, con una producción diaria entre 5.000 y 10.000 litros de lactosuero, ya sea en forma individual o conjunta. Dado que los procesos
fermentativos son del tipo por lote (batch), se analizarán tres líneas de producción, de manera tal que se pueda absorber la producción diaria de lactosuero, además de una línea para el cultivo de los microrganismos fermentativos. Asimismo, corresponde evaluar y minimizar el impacto ambiental de la planta, así como los beneficios que en este sentido se obtendrían.Fil: Fauroux, Luis Enrique. Universidad Nacional de La Matanza; ArgentinaFil: León, Paula Gabriela Verónica. Universidad Nacional de La Matanza; ArgentinaFil: Degaetani, Omar Jorge. Universidad Nacional de La Matanza; Argentin
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
Factibilidad de la obtención de ácido poliláctico partir de lactosuero
No full textEl lactosuero es un subproducto de la fabricación de quesos y manteca, y a causa del costo de inversiones, es habitualmente descartado sin tratamiento, o uso posterior, con el consiguiente riesgo ambiental. Este
artículo aborda el estudio de factibilidad de la obtención de ácido poliláctico (PLA), a partir de este lactosuero, como materia prima para impresiones 3D, hilos de sutura biodegradables, etc., teniendo en
cuenta que esto representa también un beneficio para el ambiente.
El estudio de mercado indicará la conveniencia de producir uno, otro, o una producción mixta, el PLA tiene dos formas, L(+) y D(-), siendo el isómero L(+), el biodegradable y metabolizado por el organismo
humano. La escala, inicialmente propuesta, es al nivel PyMEs y/o MiPyMEs, con una producción diaria entre 5.000 y 10.000 litros de lactosuero, ya sea en forma individual o conjunta. Dado que los procesos
fermentativos son del tipo por lote (batch), se analizarán tres líneas de producción, de manera tal que se pueda absorber la producción diaria de lactosuero, además de una línea para el cultivo de los microrganismos fermentativos. Asimismo, corresponde evaluar y minimizar el impacto ambiental de la planta, así como los beneficios que en este sentido se obtendrían.Fil: Fauroux, Luis Enrique. Universidad Nacional de La Matanza; ArgentinaFil: León, Paula Gabriela Verónica. Universidad Nacional de La Matanza; ArgentinaFil: Degaetani, Omar Jorge. Universidad Nacional de La Matanza; Argentin
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
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
Lillian L. Lambert, Author, Speaker, and Entrepreneur
No full textLillian L. Lambert, Author, Speaker, and Entrepreneu
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