171,330 research outputs found
Cretasquatina americana Maisey & Ehret & Denton 2020, new species
No full textCretasquatina americana, new species DIAGNOSIS: As for genus. ETYMOLOGY: From the Latinized version of the name Amerigo. HOLOTYPE: ALMNH 2792 (figs. 2–4, 7, 10, 11), from the Early Campanian Mooreville Chalk (unnamed member below the Arcola Limestone Member), Harrell Station Paleontological Site, Marion Junction, Dallas County, Alabama: an associated series of six anterior vertebrae (ALMNH 2792 -C; fig. 2), an almost complete left palatoquadrate approximately 125 mm long (ALMNH 2792 -A), most of a ceratohyal approximately 120 mm long (ALMNH 2792 -B), a small fragment of cartilage from the braincase, possibly part of the postorbital process (ALMNH 2792 -D), plus numerous smaller indeterminate fragments of tessellated calcified cartilage (hereafter abbreviated to TCC). REFERRED MATERIAL: ALMNH 1040 (fig. 8), including: almost complete right palatoquadrate approx. 143 mm long (ALMNH 1040-A); anterior part of left palatoquadrate (ALMNH 1040-B); two fragments of expanded arcualia from the first vertebra (ALMNH 1040-C); incomplete second vertebra (ALMNH 1040-D); vertebral centrum of uncertain position (ALMNH 1040-E.); heavily abraded vertebral centrum showing fine concentric rings (ALMNH 1040-F); numerous indeterminate fragments of calcified cartilage.Published as part of Maisey, John G., Ehret, Dana J. & Denton, John S. S., 2020, A new genus of Late Cretaceous angel shark (Elasmobranchii; Squatinidae), with comments on squatinid phylogeny, pp. 1 in American Museum Novitates 2020 (3954) on page 1, DOI: 10.1206/3954.1, http://zenodo.org/record/535551
Plantae Selectae Qvarvm Imagines Ad Exemplaria Natvralia Londini In Hortis Cvriosorvm Nvtrita Manv Artificiosa Doctaqve Pixit Georgivs Dionysivs Ehret Germanvs Occasione Havd Vvlgari Collegit Nominibvs Propriis Notisqve Svbinde Illvstravit Et Pvblico Vsvi Dicavit D. Christophervs Iacobvs Trevv Medicvs Norimbergensis In Aes Incidit Et Vivis Coloribvs Repræsentavit Ioannes Iacobvs Haid Pictor Et Chalcographvs Avgvstanvs ; Supplement
No full textPLANTAE SELECTAE QVARVM IMAGINES AD EXEMPLARIA NATVRALIA LONDINI IN HORTIS CVRIOSORVM NVTRITA MANV ARTIFICIOSA DOCTAQVE PIXIT GEORGIVS DIONYSIVS EHRET GERMANVS OCCASIONE HAVD VVLGARI COLLEGIT NOMINIBVS PROPRIIS NOTISQVE SVBINDE ILLVSTRAVIT ET PVBLICO VSVI DICAVIT D. CHRISTOPHERVS IACOBVS TREVV MEDICVS NORIMBERGENSIS IN AES INCIDIT ET VIVIS COLORIBVS REPRÆSENTAVIT IOANNES IACOBVS HAID PICTOR ET CHALCOGRAPHVS AVGVSTANVS ; SUPPLEMENT
Plantae Selectae Qvarvm Imagines Ad Exemplaria Natvralia Londini In Hortis Cvriosorvm Nvtrita Manv Artificiosa Doctaqve Pinxit Georgivs Dionysivs Ehret Germanvs Occasione Havd Vvlgari Collegit Nominibvs Propriis Notisqve Svbinde Illvstravit Et Pvblico Vsvi Dicavit D. Christophervs Iacobvs Trevv Medicvs Norimbergensis In Aes Incidit Et Vivis Coloribvus Repræsentavit Ioannes Iacobvs Haid Pictor Et Chalcographvs Avgvstanvs (-)
Plantae Selectae Qvarvm Imagines Ad Exemplaria Natvralia Londini In Hortis Cvriosorvm Nvtrita Manv Artificiosa Doctaqve Pixit Georgivs Dionysivs Ehret Germanvs Occasione Havd Vvlgari Collegit Nominibvs Propriis Notisqve Svbinde Illvstravit Et Pvblico Vsvi Dicavit D. Christophervs Iacobvs Trevv Medicvs Norimbergensis In Aes Incidit Et Vivis Coloribvs Repræsentavit Ioannes Iacobvs Haid Pictor Et Chalcographvs Avgvstanvs ; Supplement (Supplement) (1)
Cover (1)
Title page (7)
Frontispiz (11)
Titelblatt (12)
Tafelbeschreibung Tab. LXXI. - CXXI. (14)
Monitum (50)
Index (51)
Tab. LXXI. - LXXX. (52)
Tab. LXXXI. - XC. (72)
Tab. XCI. - C. (92)
Tab. CI. - CX. (112)
Tab. CXI. - CXX. (132
Estudo das ligas intermetalicas Cu33AL67 e Fe33Sn67 nanoestruturadas preparadas por mechanical alloying
No full textDissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.Este trabalho é parte de um amplo projeto de pesquisa sobre materiais nanoestruturados fabricados por Mechanical Alloying que o Grupo de Física do Estado Sólido da UFSC vem realizando. As ligas Fe33Sn67 e CU33Al67 possuem grande importância tecnológica. Devido as elevadas diferenças nos pontos de fusão dos elementos químicos, a obtenção destas ligas pelas técnicas convencionais apresentam grandes dificuldades, sendo estas superadas quando a técnica Mechanical Alloying é utilizada para a fabricação das mesmas. As técnicas de difração de raios-x e calorimetria diferencial de varredura (DSC) foram usadas no estudo das propriedades estruturais destas ligas. Os difratogramas de difração de raios-x da liga Fe33Sn67 tal como coletada e tratada termicamente foram indexados a uma rede tetragonal denominada de fase , com parâmetros de rede a = b = 6,5234 Â e c = 5,3373 Â e, a = b = 6,5369 A e c = 5,3328 Â, respectivamente. O tamanho médio encontrados para os cristalitos foram L = 164 A e L = 297 A, respectivamente. Os padrões de difração de raios-x da liga CU33Al67 tal como foi coletada e tratada termicamente foram indexados a uma rede tetragonal denominada de fase O, com parâmetros de rede a = b = 6,0636 Â e c = 4,8848 Â e, a = b =6,0547 Â e c = 4,8719 Â, respectivamente e a uma rede cúbica de face centrada (alumínio) com parâmetros de rede a = 4,0994 Â e a = 4,0993 Â, respectivamente. O tamanho médio calculados para os cristalitos da fase tetragonal foram L = 80 Â e L = 358 Â e, para a rede fc.c. foram L = 109 Â e L = 360 Â. O tratamento térmico precipitou uma nova fase na liga CU33Al67, sendo esta, possivelmente, monoclínica com o tamanho médio dos cristalitos em tomo de L = 294 A. Portanto, neste trabalho, obtemos ligas com uma estrutura nanométrica. O programa DBWS, utilizado para simular padrões de difração de raios-x, confirmou a presença da fase tetragonal nestas ligas e de alumínio metálico na liga CU33Al67 nanoestruturada
Phlorest phylogeny derived from Kitchen et al. 2009 'Bayesian phylogenetic analysis of Semitic languages identifies an Early Bronze Age origin of Semitic in the Near East'
No full text<p>Cite the source of the dataset as:</p>
<blockquote>
<p>Kitchen A, Ehret C, Assefa S & Mulligan CJ. 2009. Bayesian phylogenetic analysis of Semitic languages identifies an Early Bronze Age origin of Semitic in the Near East. Proceedings of the Royal Society B: Biological Sciences, 270(1668), 2703-2710.</p>
</blockquote>
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
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
University rankings in computer science:A study and visualization of ‘geo-based’ impact and conference proceeding (CORE) scores
No full textThis is a research-in-progress paper concerning two types of institutional rankings, the Leiden and QS World ranking, and their relationship to a list of universities’ ‘geo-based’ impact scores, and Computing Research and Education Conference (CORE) participation scores in the field of computer science. A ‘geo-based’ impact measure examines the geographical distribution of incoming citations to a particular university’s journal articles for a specific period of time. It takes into account both the number of citations and the geographical variability in these citations. The CORE participation score is calculated on the basis of the number of weighted proceedings papers that a university has contributed to either an A*, A, B, or C conference as ranked by the Computing Research and Education Association of Australasia. In addition to calculating the correlations between the distinct university rankings and the separate ‘geo-based’ versus CORE scores, we are in the process of developing a geographical visualization tool that presents the metrics so that they may be examined in an explorative way
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
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