46,045 research outputs found
Memorial de la excelente santidad y heroycas virtudes del ... Rey don Fernando tercero deste nombre, primero de Castilla i de León...
No full textTít. en antep.: El Rey Santo D. Fernando el Tercero que ganó a Sevilla i a toda la AndaluzíaPie de imp. consta en colofónSign.: *\p6\s, 2*\p4\s, A-Q\p6\s, R\p2\sTexto enmarcad
"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.
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
Vital rates and competition coeficients for control environment and estreme drought (treatment)
No full textData from: An experimental extreme drought reduces the likelihood of species to coexist despite increasing intransitivity in competitive networks.- Matías L, Godoy O, Gómez‐Aparicio L, Pérez-Ramos I (2018) An experimental extreme drought reduces the likelihood of species to coexist despite increasing intransitivity in competitive networks. Journal of Ecology 106(3): 826-837. https://doi.org/10.1111/1365-2745.12962 .- Data available from the Dryad Digital Repository: https://doi.org/10.5061/dryad.5d1s9 (Matías, Godoy, Gómez-Aparicio, & Pérez-Ramos, 2018Very little is known about how variation in environmental conditions alters the strength and the structure of competitive networks and what are the consequences of this for species coexistence.
We performed a competition experiment with 10 annual plant species to parameterise a population model describing species’ dynamics according to their vital rates and pairwise competitive coefficients. Seeds from all species were sown under two different climatic scenarios: (1) right before the first major storm of the growing season and (2) after an imposed fall drought of 2 months simulating an extreme climatic event of intense aridity.
Species’ demography and competitive responses were used to estimate pairwise stabilising niche differences and average fitness differences. In addition, we used tools from network theory to characterise the structure of multispecies competition from the determinants of species coexistence. Specifically, we evaluated changes in competitive dominance between species pairs, and the prevalence of intransitive competitive relationships for 120 triplets between these two climatic events.
The experimental extreme event significantly reduced fitness differences between species pairs. Such an equalising mechanism promotes coexistence. However, niche differences were also reduced in such a way that the number of species pairs whose niche differences overcame their fitness differences was reduced from six to two.
Contrary to our expectations, the extreme event did not increase the hierarchy of competitive dominance. Instead, and depending on the technique used, the prevalence of intransitivity remained marginally similar (17% to 22%) or significantly increased from 19.4% to 29.8%. This pattern was likely a consequence of the significant changes in competitive dominance between species pairs (26 changes out of 45; 58%).
Although fitness differences were equalised and intransitive competition promoted, our model predicted a lower likelihood of coexistence under the extreme event for both species pairs and triplets, mainly because competitive interactions did not promote enough niche differences to balance the observed fitness asymmetries in our competitive networks.
Synthesis. We empirically proved that an extreme climate results in communities with reduced niche and fitness differences in which species are less likely to coexist despite the increasing prevalence of intransitive competition.Was funded by a Juan de la Cierva grant (FPDI-2013-15867). O.G. acknowledges postdoctoral financial support provided by the Spanish Ministry for Education and Science (Juan de la Cierva, JCI-2012-12061), and by the European Union Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 661118-BioFUNC. Funding support to conduct the experiment was provided by the Spanish Ecological Terrestrial Society (AEET, Jóvenes Investigadores grant 2014/2). L.G.-A. acknowledges support from the MICINN project INTERCAPA (CGL-2014-56739-R) and European FEDER Funds. I.M.P.-R thanks the funding provided by the Ramón & Cajal Research Programme (RYC-2013-13937) and the Spanish MINECO project DECAFUN (CGL2015-70123-R).Peer reviewe
Informe de personal de apoyo: Silicani, Matías Ricardo (2011-2012)
No full textProyectos de investigación en los cuales colabora:
a) ANPCyT/MINCyT
Caracterización de procesos de infiltración y recarga en suelos de alta producción agrícola en base a trazadores y tomografía eléctrica, Director: Pablo Weinzettel, PICT 1988 ANPCyT–UNCPBA. Periodo 2008-2010 (extendido 19 de diciembre de 2011).
Validation of data from the SAC-D / AQUARIUS mission: Application to the knowledge of vegetation water stress. Director: R. Rivas, MINCyT N°7 ANPCyT. Periodo 2010-2012.
b) SPU evaluados por incentivos docentes
Análisis de la interacción suelo-agua-vegetación en unidades del paisaje sometidas a diferentes usos en un sector de la Pampa Deprimida Bonaerense, SPU 03/I031, evaluado según la Resolución Nº 1879/2008 del Ministerio de Educación y aprobado por la Secretaría de Ciencia, Arte y Tecnología de la UNCPBA, desde enero de 2011-2013. Directora: I. Entraigas.
Efectos de los ciclos húmedos y secos sobre el balance de energía y la productividad neta a escala espacial: aplicación en la región pampeana. Director: R. Rivas, SPU, 03–A178, periodo 2010-2012.
Gerenciamiento de recursos hídricos en áreas de llanura: riesgo de inundaciones superficiales y cambio climático. Director: A. Villanueva. Secat: 03/1029. Periodo: 2011-2013.
Análisis de las variaciones de niveles freáticos someros producto de la recarga y la evapotranspiración mediante tomografía eléctrica y su efecto en el aumento de la producción de los cultivos. Director: P. Weinzettel, SPU, periodo 2010-2013
Nuclis temàtics per a una geografia crítica: les propostes de D.R. Stoddart i D. Harvey
No full textL�autor introdueix el concepte de geografia crítica i comenta dues reflexions sobre la geografia.
Les aportacions de D. R. Stoddart a Berkeley el 1986 i D. Harvey a Heidelberg el 2004. Llurs
propostes propugnen una geografia crítica compromesa amb el coneixement i amb la solució dels
problemes ambientals i socials del seu temps.The author introduces the concept of critical geography and discusses two reflections on geography.
The contributions of D. R. Stoddart at Berkeley in 1986 and D. Harvey at Heidelberg in
2004. Their proposals advocate a critical geography committed with the knowledge and the solution
of environmental and social problems of his time
R-4.2.0 with all libraries necessary for caMeL
No full textThis is a zipped file with R 4.2.0 and all libraries that are necessary for for caMeL interface operation. Simply follow the guidelines to prepare your environment.Disclaimer: this is a full environment for the software operations. I am not an author of it. You should cite the developers accordingly (https://ropensci.org/blog/2021/11/16/how-to-cite-r-and-r-packages/).</p
Bianchi type-I universe in f(R, T) modified gravity with quark matter and Λ
No full text32nd International Physics Congress of Turkish-Physical-Society (TPS) -- SEP 06-09, 2016 -- Bodrum, TURKEYIn this study, we investigate homogeneous and anisotropic Bianchi type I universe in the presence of quark matter source in f (R, T) gravity (Harko et al. in Phys. Rev. D 84:024020, 2011) with cosmological constant A (where R is the Ricci scalar and T is the trace of the energy momentum tensor). For this aim we have used the anisotropy feature of Bianchi type I universe and equation of states (EoS) of quark matter. We explore the exact solution f(R, T)=R + 2f(T) model for Bianchi type I universe model. When t -> infinity, we get very small cosmological constant value, this result agrees with recent observations.Turkish Phys So
Detecting intestinal ischemia using near infrared spectroscopy
No full textBlood supply to the intestine can suddenly be interrupted. Acute mesenteric intestinal ischemia often requires invasive surgery to restore blood supply to the intestine. Early correction of vascular insufficiency is the most important factor in improving patient survival when confronted with acute mesenteric intestinal ischemia. A prolonged loss of blood flow results in irreversible damage to the intestine that can lead to death. It is also imperative that dead segments of the intestines be removed. Several subjective criteria are relied upon to differentiate viable from non-viable tissue, unfortunately, these criteria can lead to an inaccurate assessment. A porcine model of intestinal ischemia was used to determine the efficacy of using near infrared (NIR) spectroscopy to find ischemic segments of the intestine and detect the onset of reperfusion following resolution of vascular occlusion. Nine segments of intestine were identified and six were assigned to three treatment groups; (1) segments undergoing no vascular manipulations, (2) segments undergoing arterial/venous occlusion and (3) segments undergoing arterial/venous occlusion followed by reperfusion. The remaining segments were used as spacers and interposed between each of the ischemia segments. A classification model, using partial least square discriminant analysis, was built on the spectra collected from the segments with no vascular manipulations and the segments that were solely subjected to arterial/venous occlusion. The spectra collected from the intestinal segments that experienced both occlusion and reperfusion were used to test the classification model. The model was able to detect and distinguish ischemic intestinal tissue with a specificity and sensitivity exceeding 80% with an overall classification accuracy of 89%. The method appears to be well suited as an intra-operative assessment method when intestinal ischemia is a concern.Michael G. Sowa, Elicia Kohlenberg, Jeri R. Payette, Lorenzo Leonardi, Michelle A. Levasseur and Christopher B. Rile
Regula et Constitutiones sacri ordinis Sanctae Mariae de mercede redemptionis captiuorum
No full textColofón en r. de h. 160Sign.: a\p8\s, B-I\p8\s; A-V\p8\sPort. con esc. xil. de los Mercedarios, que se repite en v. de h. 16
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