1,722,851 research outputs found
Ardith Bowden and G. Wolf
No full textArdith Bowden and G. Wolf are pictured during his leave from the service
I tempi e lo spazio delle immagini
No full textIl saggio, a quattro mani (con G. Wolf) analizza la decorazione della chiesa di Santa Maria di Torcello, in particolare il mosaico dell'abside e della cappella meridionale, in relazione all'antera 'machina' decorativa della chiesa (come doveva essere in origine, fino alla fase quattrocentesca), considerandola anche sin rapporto al portato scultoreo e alla decorazione dell'iconostasi lignea. Sono considerate altresì le istanze teologiche e filologiche sottese al portato epigrafico dell'abside
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Whipp and Wolf - Charles E. Whipp and Aidtkin G. Wolf (ca. 1887)
No full textAidtkin G. Wolf, Class of 1887, is seated on left and Charles E. Whipp, non-graduate of the Class of 1887, is standing on right
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Uljana Wolf: Poesie
No full texttraduzione di una scelta di liriche tratte dalla raccolta "meine schönste lengevitch
Retinoic acid and beta-carotene inhibit fibronectin synthesis and release by fibroblasts; antagonism to phorbol ester
No full textPrevious work from our and other laboratories has shown that tumor promoters stimulated the loss of fibronectin (FN) from the cell surface of fibroblasts in culture; retinoic acid (RA) appeared to counteract this loss. We have now studied the action of RA and carotenoids on FN synthesis and release. Using mouse fibroblasts (C3H/10T1/2 cells), we found that RA inhibited release of FN into the medium in a time- and concentration-dependent manner (e.g. 90% inhibition in 48 h with 1 x 10(-6) M RA). RA caused inhibition of synthesis, as well as a time- and concentration-dependent decrease in FN mRNA. A second phenomenon we observed was the greatly increased binding of FN to the surface of the cells, both in dimeric and multimeric forms, caused by RA treatment. RA produced a striking inhibition of the 12-O-tetradecanoyl-phorbol-13-acetate (TPA)-stimulated FN release from the cell surface usually associated with tumor promotion. We postulate that the combined action of RA in causing decreased FN synthesis and increased FN binding to the cell surface is the reason for the apparent antagonism of RA to the TPA-stimulated release of FN. Surprisingly, beta-carotene (BC) and canthaxanthin (a non-provitamin A carotenoid) also inhibited the release of FN from these cells. The action of BC was specific, in that an antioxidant carotenoid (trans-methyl-bixin) and lycopene were inactive. BC also inhibited FN synthesis and thus inhibited the TPA-stimulated release of FN, similar to RA, but to a lesser extent. BC had no effect on the binding of FN to the cell surface
The effect of sphingosine on the release of fibronectin from human lung fibroblasts
No full textPrevious work from our laboratory (Scheidl et al. (1992) Biochim. Biophys. Acta 1135, 295-300) has shown that sphingosine (Sph), a known inhibitor of protein kinase C (PKC) inhibited the release of fibronectin (FN) into the media of fibroblast cells in culture and that this effect was independent of PKC. We now report that the action of Sph was time dependent (maximum inhibition in 2 h), concentration dependent (0.5-10 microM, at which concentration Sph was not toxic), and rapidly reversible after removal of Sph. Incubating with [35S]methionine, we found Sph reduced FN release either by inhibition of FN synthesis or FN secretion. To distinguish between these two possibilities, cells were treated with monensin, an inhibitor of FN secretion, which together with Sph showed no additive effect on FN release. Cycloheximide also inhibited FN release, but this inhibition was additive to that with monensin. We concluded that Sph inhibited secretion of FN, not synthesis. Furthermore, intracellular FN declined less in Sph-treated than in untreated control cells. By cell-surface iodination with Na125I and lactoperoxidase, followed by immunoprecipitation with antibodies to FN and alpha 5 beta 1-integrin, we showed that labeled multimeric and dimeric cell-surface FN declined, whereas integrins remained unchanged upon Sph treatment. This result suggested that though the number of cell-surface receptors for FN was not affected by Sph, their affinity may be reduced. In addition, we found that either pre- or co-treatment for 30 min with Sph caused a robust inhibition of cell adhesion to FN-coated plastic. We conclude that Sph rapidly inhibits FN secretion, lowers cell-surface FN, and greatly reduces cell adhesion to a FN substratum
- …
