169,738 research outputs found
Nuevas faunas de roedores del Mioceno medio y del Mio-Plioceno en la cuenca del Cabriel (Valencia, España)
No full textFive new localities with micromammal remains have been located in the Cabriel Basin. These localities are situated in the eastern area of the Cabriel Basin, in the Juan Vich ravine, where the oldest deposits of this basin crop out. The localities JV2, JV3 and JV6 are of Middle Miocene age, JVTLI1 of Middle Miocene or Late Miocene age and JVTS1 of Late Miocene or Early Pliocene age. The beginning of the sedimentary history of the basin was attributed to Late Turolian (Late Miocene). The new sedimentary record from the Juan Vich ravine and the mammalian findings extend the stratigraphic and paleontological knowledge of the Basin.Cinco nuevas localidades con restos de micromamíferos han sido localizadas en la cuenca del Cabriel. Estas localidades se sitúan en el sector este, en el conocido como barranco de Juan Vich, donde afloran los depósitos más antiguos de esta cuenca. Las localidades JV2, JV3 et JV6 son del Mioceno medio, del Mioceno medio o superior JVTLI1 y del Mioceno superior o Plioceno inferior JVTS1. El inicio de la sedimentación en esta cuenca se había datado en el Turoliense. El registro sedimentario del barranco de Juan Vich y la fauna de mamíferos hallada en él, amplían el conocimiento estratigráfico y paleontológico de esta cuenca
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
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 20 (78 c)]
No full textHandschrift DE-3, GND 2024680-8, Signatur: Morbio 20 (78 c)Die Illustrationen sind: NotarszeichenÜberlieferungsart: originalBeschreibstoff: PergamentErhaltungszustand: moderatEs befinden sich drei Urkunden auf dem BogenHandschriftUrkund
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
Beneficios impositivos de las micro, pequeñas y medianas empresas en Argentina
No full textLas MiPyMEs son los principales motores de un país, aportan producción y empleo, garantizan una demanda sostenida, motorizan el progreso y dan a la sociedad un saludable equilibrio, por tal motivo es que los gobiernos de turno buscan alentar al sector con medidas que impulsen su crecimiento del sector. En pocas palabras, así lo define Carlos Cleri en El libro de las Pymes “Las Pymes con la columna vertebral de las economías nacionales”. Entre 2015 y 2019 cerraron 24.505 empresas, lo que representó una contracción de 4,3% a lo largo de ambos períodos, en un contexto en el que el sector más afectado fue el de las pequeñas y medianas empresas, según cifras de la Administración Federal de Ingresos Públicos (Afip). Nuestro país en uno de los estados con mayores cargas tributarias del mundo, situación que pone en riesgo a las MiPyMEs lo cual agrava la situación de vulnerabilidad a la que se enfrenta habitualmente. La economía de las MiPyMEs, atraviesan mayores dificultades que las grandes empresas para enfrentar la crisis, y como consecuencia también se ve perjudicada toda la economía. Esto se traduce en una mayor evasión y una mayor irregularidad impositiva: empleo en negro, transacciones sin el respectivo respaldo documental, declaraciones juradas apócrifas, etc. “Para Lograr resultados positivos la cultura formal debe coincidir con la informal” C. Cleri.Fil: Laiño, Adriana Laura. Universidad Nacional de San Martín. Escuela de Economía y Negocios; Buenos Aires, ArgentinaFil: Cabriel, Marina Alejandra. Universidad Nacional de San Martín. Escuela de Economía y Negocios; Buenos Aires, Argentin
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
A 0.12mm<sup>2</sup> Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
No full text Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range. Session 10.3 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
La freza de la trucha común en la cuenca alta del río Cabriel. Resultados y utilidad para la gestión
No full textECOHIDRÁULICA realiza actualmente el estudio hidrobiológico de la cuenca alta del río Cabriel, para la Junta de Castilla-La Mancha. En el marco de este proyecto se ha estudiado la freza de la trucha común (Salmo trutta L.). El trabajo de campo ha sido realizado, durante el invierno 2007-2008, por Agentes de la Junta, que han tomado datos de los frezaderos detectados en cada tramo muestreado. Se ha registrado: ubicación del tramo, fecha del muestreo, tipo de hábitat, número de frezaderos en el tramo, solapamiento, ubicación dentro del tramo y dimensiones de los frezaderos, problemática y, en caso de ser observada, características de la acción de freza
A ±25A Versatile Shunt-Based Current Sensor with 10kHz Bandwidth and ±0.25% Gain Error from -40°C to 85°C Using 2-Current Calibration
No full textAccurate current sensing is critical in many industrial applications, such as battery management and motor control. Precise shunt-based current sensors have been reported with gain errors of less than 1% over the industrial temperature range (-40°C to 85°C) [1]–[4]. However, since they are intended for coulomb counting, their bandwidth is limited to a few tens of Hz, making them unsuitable for battery impedance or motor-current sensing. This paper presents a current sensor with a wide (10kHz) bandwidth and a tunable temperature compensation scheme (TCS), which allows it to be flexibly used with different types of shunts while maintaining high accuracy. A low-cost room-temperature calibration scheme is proposed to optimize gain flatness over temperature by exploiting the shunt's self-heating at large currents. Over the industrial temperature range and a ±25A current range, it achieves state-of-the-art gain error (±0.25%) with both low-cost PCB and stable metal-alloy shunts.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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