170,483 research outputs found
Flament (C.) - Théorie des graphes et structures sociales.
No full textGuitton Henri. Flament (C.) - Théorie des graphes et structures sociales.. In: Revue économique, volume 17, n°6, 1966. p. 1025
Flament (C.) - Théorie des graphes et structures sociales.
No full textGuitton Henri. Flament (C.) - Théorie des graphes et structures sociales.. In: Revue économique, volume 17, n°6, 1966. p. 1025
Fisher (F.M.) - A priori information and time series analysis. Essays in economic theory and measurement. Fisher (F.M.), Kaysen (C.) - A study in econometrics. The demand for electricity in the United States.
No full textGuitton Henri. Fisher (F.M.) - A priori information and time series analysis. Essays in economic theory and measurement. Fisher (F.M.), Kaysen (C.) - A study in econometrics. The demand for electricity in the United States.. In: Revue économique, volume 14, n°2, 1963. pp. 305-306
Fisher (F.M.) - A priori information and time series analysis. Essays in economic theory and measurement. Fisher (F.M.), Kaysen (C.) - A study in econometrics. The demand for electricity in the United States.
No full textGuitton Henri. Fisher (F.M.) - A priori information and time series analysis. Essays in economic theory and measurement. Fisher (F.M.), Kaysen (C.) - A study in econometrics. The demand for electricity in the United States.. In: Revue économique, volume 14, n°2, 1963. pp. 305-306
A. Pacaud et C. Vidal (avec la collab. des Prs Aventur, Colonna et Guitton), A chacun son temps
No full textCosta De Beauregard O. A. Pacaud et C. Vidal (avec la collab. des Prs Aventur, Colonna et Guitton), A chacun son temps. In: Revue d'histoire des sciences, tome 29, n°3, 1976. pp. 273-274
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
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
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
Fatal intoxication after taking iboga: GC-MS/MS determination of ibogaine and ibogamine in iboga roots and post-mortem material
No full textObjective: Tabernanthe iboga, or iboga, is a shrub native to equatorial Africa. Its root is commonly taken as a stimulant and hallucinogen. Ibogaine, the principal alcaloid in the plant, is the source of its psychotropic effects. We report the case of a 27-year-old man with a long history of drug addiction who was found dead in 2006, 12 hours after ingesting powdered iboga root as part of a detoxification programme. Ibogaine and ibogamine were identified and quantified in the powder ingested and in the body fluid samples taken at the scene of death and during the autopsy. Methods: Analysis was carried out using GC-MS/MS (electron impact - ion trap) after performing liquid-liquid extraction on the body fluids. Results: The concentrations measured in the post-mortem peripheral blood samples taken at the scene, and in the peripheral blood, urine and gastric juice samples taken during the autopsy were: 0.65, 1.27, 1.71 and 53.5 μg mL-1 for ibogaine; and 0.05, 0.10, 1.12 and 4.34 μg mL-1 for ibogamine. The powder was titrated at 7.2 per cent for ibogaine and 0.6 per cent for ibogamine. Conclusion: The presence of the two molecules in the biological samples was consistent with the recent ingestion of Tabernanthe iboga roots. The combined consumption of other central nervous system depressants (diazepam and methadone), revealed by further toxicological analysis, confirms the hypothesis of death caused by mixed overdose, of which the principal toxin was ibogaine. © 2012 Société Française de Toxicologie Analytique
NIAS-db
No full textNIAS-db 1.0 is an open-source software in R, developed with the Shiny framework and the Chromium Portable v16.0.3153.0 web browser (32-bit) for exploring databases of theoretical oligoesters and phenolic oligomers. NIAS-db 1.0 is freely available under the GPLv3 license. It is packed as an executable file of 1.0 GB. It runs out of the box without need for computer skills or administrative rights, when installed in a folder in which the user has full read/write access (not necessarily C/Program files). Once installed, the uncompressed database reaches 10.0 GB. The NIAS-db Windows command file available at the folder root launches the interface. Queries can be performed from either the neutral chemical formula or the monoisotopic mass with a mass tolerance (mDa)
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