102,172 research outputs found
Optimization of the production strategy with a dual flow horizontal completion technique
No full textInducible overexpression of angipoietin-1 and angiopoietin-2 in the glomerulai of adult transgenic mice via the tetracycline regulatable system.
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Estimating geometric tortuosity of saturated rocks from micro-CT images using percolation theory
No full textTortuosity ( ) is one of the key parameters controlling flow and transport in porous
media. Although the concept of tortuosity is straightforward, its estimation in porous
media has yet been challenging. Most models proposed in the literature are either empirical
or semiempirical including some parameters whose values and their estimations are
in prior unknown. In this study, we modified a previously presented geometric tortuosity
(
g ) model based on percolation theory and validated it against a methodology based on
the pathfinding A* algorithm. For this purpose, we selected 12 different porous materials
including four sandstones, three carbonates, one salt, and four synthetic media. For all
samples, five sub-volumes at different lengths with fifty iterations were randomly selected
except one carbonate sample for which three sub-volumes were extracted. Pore space properties,
such as pore radius, throat radius, throat length, and coordination number distributions
were determined by extracting the pore network of each sub-volume. The average and
maximum coordination numbers and minimum throat length were used to estimate the
g .
Comparison with the A* algorithm results showed that the modified model estimated the
g
accurately with absolute relative errors less than 28%. We also estimated the
g using two
other models presented in the literature as well as the original percolation-based tortuosity
model. We found that our proposed model showed a significantly higher accuracy. Results
also indicated more precise estimations at the larger length scales demonstrating the effect
of uncertainties at the smaller scales
Rosiglitazone is more effective than metformin in improving fasting indexes of glucose metabolism in severely obese, non-diabetic patients
No full textIn obese patients, the diet-induced weight loss markedly improves glucose tolerance with an increase in insulin sensitivity and a partial reduction of insulin secretion. The association with metformin treatment might potentiate the effect of diet alone
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
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
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
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