169,838 research outputs found
San Salvatore di Tolla nel panorama delle istituzioni monastiche dell’Italia padana. Alcuni spunti di riflessione
No full textIl contributo contestualizza lo scavo archeologico del monastero di San Salvatore di Tolla, in relazione al contesto monastico coevo dell'Italia settentrional
Relevant deformations in open string field theory: A simple solution for lumps
No full textWe propose a remarkably simple solution of cubic open string field theory which describes inhomogeneous tachyon condensation. The solution is in one-to-one correspondence with the IR fixed point of the RG-flow generated in the two-dimensional worldsheet theory by integrating a relevant operator with mild enough OPE on the boundary. It is shown how the closed string overlap correctly captures the shift in the closed string one point function between the UV and the IR limits of the flow. Examples of lumps in non-compact and compact transverse directions are given. © SISSA 2011.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
Ghost story. III. Back to ghost number zero
No full textAfter having defined a 3-strings midpoint-inserted vertex for the bc system, we analyze the relation between gh=0 states (wedge states) and gh=3 midpoint duals. We find explicit and regular relations connecting the two objects. In the case of wedge states this allows us to write down a spectral decomposition for the gh=0 Neumann matrices, despite the fact that they are not commuting with the matrix representation of K1. We thus trace back the origin of this noncommutativity to be a consequence of the imaginary poles of the wedge eigenvalues in the complex κ-plane. With explicit reconstruction formulas at hand for both gh=0 and gh=3, we can finally show how the midpoint vertex avoids this intrinsic noncommutativity at gh=0, making everything as simple as the zero momentum matter sector. © SISSA 2009.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
Stirellus tolla
No full textStirellus tolla (Pruthi) n. rec. (Figs 6–8) Aconura tolla Pruthi, 1930: 39. Measurement. Male: 3.00– 3.50mm. Coloration and Morphology. General color yellowish green (Fig. 6 A–C). Crown with yellow hues. Eye dark greyish, surrounded with orange band (Figs 6 A–C, 8A, 8C). Pronotum posterior region blackish with minute dots. Mesonotum with basal triangles orange (Fig. 6A, 6C). Scutellum yellowish. Forewing pale with white venation (Fig. 6 A–B). Crown narrower than pronotum, almost as long as distance between eyes, anteriorly slightly angulate (Figs 6A, 6C, 8A, 8D). Eye relatively large. Ocellus next to eye slightly below anterior margin of crown. Face as long as broad, with transverse markings near eyes (Fig. 6D). Pronotum median length nearly as long as median length of crown (Figs 6A, 6C, 8A, 8D). Mesonotum and scutellum shorter than pronotum (Fig. 6A, 6C). Forewing macropterous (Figs 6 A–B, 8A, 8G). Male genitalia. Pygofer elongated, without macrosetae, apex as in Figs 7A, 8H. Subgenital plate slightly concave laterally, apically rounded, macrosetae uniseriate laterally (Fig. 7C). Style narrow, apophysis digitate, curved laterally (Figs 7C, 8K). Connective with stem slightly shorter than arms (Figs 7D, 8L). Aedeagal shaft long, strongly curved basally, almost parallel to aedeagal base, with preapical anterior expansion visible in lateral and posterior views, apex pointed and slightly curved anterad (Figs 7 E–F, 8M). Material examined. 1♂, Pakistan: Khyber Pakhtunkhwa: Khairabad Kund, 33°54′15.1596 N, 72°13′37.8264 E, Sweeping hand net, 20 August 2018, coll. Bismillah Shah. Remarks. This species was not placed in the previous checklist because of unconfirmed identity. Present studies have confirmed its identity and existence in Pakistan. This species differs from most other species of the genus in the shape and size of the crown, which is shorter and bluntly angulate at the anterior margin, by the eyes surrounded with an orange band and the pronotum posterior region blackish with minute dots. This species is somewhat similar to Stirellus daii Duan, Webb & Zhang in genital characters but differs in external appearance. Its male genitalia also show similarity with Stirellus rubrolineatus Distant but differ in subgenital plates.Published as part of Shah, Bismillah, Naveed, Hassan & Duan, Yani, 2020, Taxonomic review of the leafhopper genus Stirellus Osborn & Ball (Hemiptera Cicadellidae: Deltocephalinae: Stenometopiini) from Pakistan with description of a new species, pp. 189-202 in Zootaxa 4763 (2) on pages 196-197, DOI: 10.11646/zootaxa.4763.2.3, http://zenodo.org/record/375820
EMERGENCY AND SURVEY. THE USE OF PHOTO MODELING TO DOCUMENT THE MINOR HERITAGE AFTER A NATURAL CALAMITY
No full textGoing 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
Ghost story. I. Wedge states in the oscillator formalism
No full textThis paper is primarily devoted to the ghost wedge states in string field theory formulated with the oscillator formalism. Our aim is to prove, using such formalism, that the wedge states can be expressed asSCOPUS: ar.jinfo:eu-repo/semantics/publishe
Ghost story. II. The midpoint ghost vertex
No full textWe construct the ghost number 9 three strings vertex for OSFT in the natural normal ordering. We find two versions, one with a ghost insertion at z = i and a twist-conjugate one with insertion at z = - i. For this reason we call them midpoint vertices. We show that the relevant Neumann matrices commute among themselves and with the matrix G representing the operator K1. We analyze the spectrum of the latter and find that beside a continuous spectrum there is a (so far ignored) discrete one. We are able to write spectral formulas for all the Neumann matrices involved and clarify the important role of the integration contour over the continuous spectrum. We then pass to examine the (ghost) wedge states. We compute the discrete and continuous eigenvalues of the corresponding Neumann matrices and show that they satisfy the appropriate recursion relations. Using these results we show that the formulas for our vertices correctly define the star product in that, starting from the data of two ghost number 0 wedge states, they allow us to reconstruct a ghost number 3 state which is the expected wedge state with the ghost insertion at the midpoint, according to the star recursion relation. © SISSA 2009.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
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
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