170,131 research outputs found
An algorithmic approach to Dold-Puppe complexes
No full textA Dold-Puppe complex is the image NF\Gamma(C.) of a chain complex C. under the composition of the functors \Gamma, F and N where \Gamma and N are given by the Dold-Kan correspondence and F is a not-necessarily linear functor between two abelian categories. The first half of this paper gives an algorithm that streamlines the calculation of \Gamma(C.). The second half gives an algorithm that allows the explicit calculation of the Dold-Puppe complex NF\Gamma(C.) in terms of the cross-effect functors of F
On the derived functors of the third symmetric-power functor
No full textWe compute the derived functors of the third symmetric-power functor and their cross-effects for certain values. These calculations match predictions by the first named author and largely prove them in general
Dolls/puppets as soulmates – biographical traces of dolls/puppets in art, literature, work and performance
No full texthttps://dedo.ub.uni-siegen.deDie vorliegende vierte Ausgabe der Zeitschrift denkste: puppe / just a bit of: doll (de:do), ein multidisziplinäres Online-Journal für Mensch-Puppen-Diskurse, greift den Themenschwerpunkt Puppen als Seelenverwandte – biographische Spuren von Puppen in Kunst, Literatur, Werk und Darstellung auf. Es geht um die Frage nach Wirkungen früher Puppenerfahrungen in der späteren künstlerischen Arbeit und damit nach den möglichen (biographischen) Wurzeln und Zusammenhängen von Puppenmotiv und Puppen-Narrativen im künstlerisch-literarischen Werk. Puppenbezüge in Werk- und Schaffensprozessen können frühe Erfahrungen biographischer Brüche und Verletzungen transformieren bzw. sie künstlerisch produktiv integrieren, sie können aber auch Ausdruck für Kontinuität und Intensivierung früher Prägungen und Vorlieben sein. In den vorliegenden Beiträgen geht es um puppenbezogene künstlerische Ausdrucksformen, die als Beiträge hier formal unterschiedlich aufbereitet werden: als wissenschaftsbasierter Text, Selbstbericht, Miszelle, Rezension, Interview und: Kunstwerk. Untersucht und thematisiert werden Puppen-Sammlungen, die Herstellung besonderer Puppen, literarische Puppentexte, Inszenierungen und Bilder. Außerdem wurden weitere Beiträge einbezogen, die Puppen als Varianten „künstlicher Menschen“ in unterschiedlichsten Themenbezügen behandeln. In vielen Beiträgen deutet sich an, dass die Affinität zum „Phänomen Puppe“ in seinen verschiedenen künstlerischen Umsetzungsformen auf biographisch geprägte Spuren verweist: als Ausdrucks- und Darstellungsmittel steht die Puppe somit auch für etwas Besonderes der Menschen, die sich künstlerisch auf sie beziehen und mit ihr interagieren und „spielen“.This fourth issue of denkste: puppe / just a bit of: doll (de:do), a multidisciplinary online journal for human-doll discourses, takes up the thematic focus on dolls/puppets as soulmates – biographical traces of dolls/puppets in art, literature, work and performance. It is about the impact of early doll experiences in later artistic work and thus about the possible (biographical) roots and connections of doll motifs and doll narratives in artistic-literary work. Doll/puppet references in work and creative processes can transform early experiences of biographical breaks and harm or integrate them in an artistically productive way, but they can also be an expression of continuity and intensification of early experience and preferences. The present contributions deal with doll/puppet-related artistic forms of expression, which are formally presented in different ways: as science-based text, self-report, miscellaneous, review, interview and: work of art. Doll/puppet collections, the making of particular puppets, literary puppet texts, performances and images are examined and addressed. In addition, further contributions were included, which deal with dolls as variants of "artificial humans" in the most diverse thematic contexts. Most of the contributions indicate that the affinity to the “phenomenon of the doll” in its various artistic forms of realization refers to biographically shaped traces: as a means of expression and representation the doll thus also stands for something special about the human beings who refer to it artistically and interact and "play" with it
A simple ultrafilter proof for an impossibility theorem in judgment aggregation
No full textWe show how ultrafilters can be used to prove a central impossibility result in judgement aggregation introduced by Nehring and Puppe (2005), namely that for a logically strongly interconnected agenda, an independent and monotonic judgement aggregation rule which satisfies universal domain, collective rationality and sovereignty is necessarily dictatorial.judgment aggregation
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
Propositionwise judgment aggregation
No full textIn the theory of judgment aggregation, it is known for which agendas of propositions it is possible to aggregate individual judgments into collective ones in accordance with the Arrow-inspired requirements of universal domain, collective rationality, unanimity preservation, non-dictatorship and propositionwise independence. But it is only partially known for which agendas it is possible to respect additional requirements, notably non-oligarchy, anonymity, no individual veto power, or implication preservation. We fully characterize the agendas for which there are such possibilities, thereby answering the most salient open questions about propositionwise judgment aggregation. Our results build on earlier results by Nehring and Puppe (2002), Nehring (2006) and Dietrich and List (2007a).mathematical economics;
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
Computing the homology of Koszul complexes
No full textLet R be a commutative ring and I an ideal in R which is locally generated by a regular sequence of length d. Then, each projective R/I-module V has an R-projective resolution P. of length d. In this paper, we compute the homology of the n-th Koszul complex associated with the homomorphism P_1 --> P_0 for all n, if d = 1. This computation yields a new proof of the classical Adams- Riemann-Roch formula for regular closed immersions which does not use the deformation to the normal cone any longer. Furthermore, if d = 2, we compute the homology of the complex N Sym^2 K(P.) where K and N denote the functors occurring in the Dold-Kan correspondence
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