173,182 research outputs found
Atmosfere natalizie: Luci d’Artista o luci di Natale? Buone pratiche sociali e estetiche rivolte a turisti e cittadini
No full textIl contributo ripercorre la vicenda storica dell'evento Luci d'Artista a Torino.
Inoltre propone un'analisi dei luoghi in cui gli eventi natalizi sostenuti da fondazioni sono stati leva per lo sviluppo del turismo e il coinvolgimento delle comunità locali
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
Bad news about an old poison. A case of nicotine poisoning due to both ingestion and injection of the content of an electronic cigarette refill
No full textThere are increasing concerns about the escalating use of electronic cigarettes (e-cigarettes). In particular, smokers have been advised by important agencies such as the US Food and Drug Administration about the potential harm to the health of these products, being now considered as drug delivery devices. The leading issues supporting this statement include the repeated inhalation of propylene glycol that is used as a diluent in refills, accidental poisoning, as well as evidence that ecigarettes may promote continued smoking since their use may compromise quitting motivations. Some authors have minimized these risks, considering the potential advantages of these devices for public health. Here we describe the first case of nicotine poisoning due to both ingestion and intravenous injection of the content of an e-cigarette refill, incorrectly mixed with methadone, bottled in a generic vial
Le PMI italiane e internet: luci ed ombre. I risultati di una ricerca empirica
No full textIl contributo concentra la sua attenzione sulle Piccole e Medie Imprese italiane. A fronte di una breve analisi delle caratteristiche gestionali e dei comportamenti più diffusi in tema di internazionalizzazione, l’attenzione viene prevalentemente concentrata sull’analisi di Internet quale strumento a supporto delle attività d’impresa e di marketing, sia sui mercati nazionali che internazionali.
Prendendo spunto dalla letteratura e da alcune indagini empiriche realizzate sullo stesso argomento, vengono commentati i principali risultati di un’indagine volta a comprendere il ruolo attualmente attribuito ad Internet da parte delle PMI italiane. A questo scopo è stato analizzato un campione rappresentativo di 270 siti di imprese piccole e medie, suddivise in 10 settori di attività (rappresentatività per settore e regione geografica). Le osservazioni sono state svolte nel periodo giugno-agosto 2004, per essere poi ripetute nei mesi di giugno-agosto 2006.
L’analisi delle informazioni raccolte conduce ad uno scenario costellato di luci ed ombre. Le luci sono relative ai numerosi miglioramenti intervenuti sui siti, che attengono principalmente alla struttura, alla relazione con la clientela e alla presentazione dei prodotti. Le ombre invece, oltre a interessare alcuni elementi dell’Internet marketing mix (distribuzione, comunicazione e pricing) hanno attinenza anche all’orientamento strategico dell’imprese e alle attività di pianificazione
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
Recommended from our members
Plug-in cross-dispersing module for the Large Binocular Telescope's infrared spectrograph LUCI
No full textThe large binocular telescope (LBT) can spectrally characterize faint objects from the ultraviolet (UV) to the near infrared (NIR) using two instruments, such as multiobjects double spectrograph (MODS) and LBT utility camera in the infrared (LUCI), which are pairs of imagers and spectrographs. Although LUCI can cover the NIR bands (0.9 to 2.4 μm), we currently need to use both LUCIs at the same time with existing gratings and filters. We report on the design and initial construction of a modular system called mask-oriented breadboard implementation for unscrambling spectra (MOBIUS) that enables a single LUCI to produce a full NIR spectrum (0.9 to 2.4 μm) in a single exposure. MOBIUS is a Littrow type spectrograph that is installed within the limited space of exchangeable mask frame space of LUCI. This plug-in concept requires no modification to the current instrument while dispersing the input slit perpendicular to the dispersion direction of the gratings in LUCI. With MOBIUS, we can utilize a slit length up to 2.3 arcsecond to acquire zJHK spectra without mixing orders at the LUCI image plane. In binocular observations with the LBT, a MODS spectrograph will be used with a LUCI + MOBIUS to acquire spectra across the full optical NIR wavelength range from 0.3 to 2.4 μm simultaneously. This will benefit studies of transient sources from rotating asteroids in our solar system to gamma-ray bursts, as well as anything with broad spectral features or unknown redshifts. The design process, tolerances, and initial table-Top testing results to verify the operation of MOBIUS are presented in this work. © 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).Immediate accessThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]
- …
