132,561 research outputs found
Leer y escribir : la lectura y la escritura en diferentes disciplinas en el comienzo de los estudios universitarios
No full textEste libro pertenece a los Manuales de cátedra de la UNAJ, para la materia Taller de Lectura y Escritura del Ciclo Inicial (Instituto de Estudios Iniciales). Este libro fue pensado por un grupo de profesores de dicha materia para nuestros estudiantes, y diseñado en función de ellos y de sus particularidades, este manual se propone colaborar con la mejora de sus habilidades de lecto-comprensión y escritura, con la finalidad de que puedan desarrollar con éxito su carrera universitaria y, posteriormente, su actividad profesional.Fil: Battilana, Carlos. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Battilana, Carlos. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina.Fil: Benítez, Ernesto. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Benítez, Ernesto. Universidad Nacional de Luján; Argentina.Fil: Ferrari, Mariela. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Ferrari, Mariela. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina.Fil: Ferrari, Mariela. Universidad Nacional de General Sarmiento; Argentina.Fil: Garbarini, Mónica. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: López D'Amato, Silvia. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: López D'Amato, Silvia. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Filología y Literaturas Hispánicas “Dr. Amado Alonso”; Argentina.Fil: Orlante, Emiliano. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Orlante, Emiliano. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina.Fil: Salinas, Martín. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Salinas, Martín. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina.Fil: Savio, Karina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Schnirmajer, Ariela. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Schnirmajer, Ariela. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina.Fil: Sozzi, Martín. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Literatura Hispanoamericana; Argentina.Fil: Sozzi, Martín. Universidad Nacional de Tres de Febrero. Programa de Estudios Literarios Latinoamericanos y Comparados; Argentina.Fil: Sozzi, Martín. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Vinelli, Elena. Universidad Nacional Arturo Jauretche. Instituto de Estudios Iniciales; Argentina.Fil: Vinelli, Elena. Universidad Nacional de Lomas de Zamora; Argentina
Comment to: Laparoscopic posterior cruroplasty: a patient tailored approach. Authors’ reply
No full textDifferences of CIGS cell performance with Zn(O, S)/(Zn, Mg)O or CdS/i-ZnO buffers system explored by numerical simulations
No full textStarting from the standard layer sequence of Mo/Cu(In, Ga)Se2/CdS/i-ZnO/ZnO:Al the cell n-side has been modified by replacing the CdS/i-ZnO with Zn(O, S) buffer in combination with (Zn, Mg)O as high-resistive layer, without changing the CIGS bulk. Measurements show a reduction of the cell performance compared to CdS/i-ZnO structure. In order to investigate the observed behavior, numerical simulations are used to examine the effect of the CIGS/Zn(O, S) interface properties on the cell performance. In particular, since the two sets of cells share the same CIGS, the effects on the solar cell's figures of merit of variations of the conduction band offset and defects properties at the buffer/absorber interface are analyzed
Effectiveness of 1-MCP treatments on ‘Bartlett’ pears as influenced by the cooling method and the bin material
No full textWooden bin-stored ‘Bartlett’ pears (Pyrus communis L.) were hydrocooled (HC) or forced-air cooled (FAC) and immediately treated or not with 1-methylcyclopropene (1-MCP) for 24 h. 1-MCP gas concentrations used were 0, 0.3 or 0.6 μL L−1 (called 0, 0.3 and 0.6, respectively). Fruit were subsequently kept at 20 °C for 20 d or stored at −0.5 °C and 95% RH for 60, 90, 120 or 150 d. After cold storage, fruit were kept at 20 °C for up to 16 d for further ripening. In another experiment, pears stored in wooden bins (W) or plastic bins (P) were all hydrocooled, treated or not with 0.5 μL L−1 1-MCP (called 0.5 and 0, respectively), stored at −0.5 °C and 95% RH for 0, 30, 60, 90 or 120 d, and transferred to 20 °C for further ripening. In FAC pears, increasing 1-MCP concentrations usually resulted in delayed increases in ethylene production and lower ethylene production rates, as well as delayed softening. In contrast, HC-0.3 pear firmness did not differ from that of HC-0 fruit after cold storage. Generally, HC-0.3 pears displayed higher ethylene production and lower firmness values than FAC-0.3 pears after a 7-d exposure to 20 °C, regardless the length of cold storage. FAC-0.6 pears always showed lower ethylene production rates and higher flesh firmness values than HC-0.6 fruit. Soluble solids concentration was not consistently affected by 1-MCP. FAC-0.3 and HC-0.6 fruit showed higher titratable acidity values than HC-0 fruit after 0, 60, 120 and 150 d of cold storage plus 7 d at 20 °C. Effectiveness of 1-MCP treatments on HC pears was influenced by the bin material; P-0.5 pears were firmer than W-0.5 pears after 7 d at 20 °C, regardless the length of the cold storage. HC-0.5 fruit exposed to −0.5 °C for 90 d reached eating quality (firmness ≤23 N) by day 7 if placed in W, and by day 21 when stored in P. Results and previous evidence suggest that wet wooden bin material may represent a major though unpredictable source of 1-MCP sorption that could bind a significant percentage of the 1-MCP applied. When used at relatively low doses 1-MCP partial removal by wet wooden bins can compromise the application effectiveness for controlling ethylene action.EEA Alto ValleFil: Calvo, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; ArgentinaFil: Sozzi, Gabriel Oscar. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Sozzi, Gabriel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
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
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
The effect of gate and recess scaling on the gate-drain breakdown and hot-electron reliability of AlGaAs/GaAs power HFETs
No full textEpithelial-myoepithelial carcinoma of the minor salivary glands: immunohistochemical and morphological features.
No full textAims: Epithelial-myoepithelial carcinoma (EMC) is a rare malignant salivary gland neoplasm that most commonly occurs in the parotid gland, but can also arise in the minor salivary glands. Three cases are reported of epithelialmyoepithelial carcinoma of the minor salivary glands, with the goal of better defining this entity. Patients and Methods: All three cases showed a characteristic nodular/multinodular growth pattern and classic biphasic tubular histology. All parts of each tumor were surrounded by a myoepithelial cell rim and there was evidence of invasion. Results: Immunohistochemical analysis showed the tumor cells to be weakly positive for S1OO, cytokeratin (CK) CK5/6, CK7, CKAE-1/AE-3 and strongly positive for epithelial membrane antigen (EMA) and p63; they were focally positive for calponin and acute lymphoblastic leukemia antigen (CD1O). The tumor cells were negative for vimentin, a-smooth muscle actin (SMA) (except one case), glial fibrillar acid protein (GFAP) and MIB1. The tumors were resected completely with wide margins and no recurrence or metastasis had occurred from 6 to 15 months after surgery. Conclusion: Three cases of minor salivary gland tumors are described and the differential diagnosis underlined in relation to benign myoepithelioma. The characteristic morphological and immunohistochemical features aided diagnosis of these biphasic tumors
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