125,907 research outputs found
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
Patch testing with the compositae mix. Results of a study of the German Contact Dermatitis Research Group (DKG) and the Information Network of Departments of Dermatology (IVDK)
No full textFrom 1996 to 1999 the Compositae mix has been tested epicutaneously at 25 departments of dermatology in 13232 patients. In 3703 patients the Compositae mix was compared with the sesquiterpene lactone mix. The Compositae mix consisted of short ether extracts of the 5 Compositae species arnica, German chamomile, yarrow, tansy and fever-few, while the sesquiterpene lactone mix contained the three pure compounds costunolid, alantolactone and dehydrocostus lactone. 313 of the 13232 patients (2.4%) reacted to the Compositae mix. Almost the same rate of positive reactions was achieved in unselected patients tested with Compositae mix as an appendix to the standard series. Of the 3703 patients tested with both mixes, 120 reacted to the Compositae mix (3.2%) and 62 to the sesquiterpene lactone mix (1.7%). 51 individuals responded to both mixes. 69 reacted solely to the Compositae mix, but not to the sesquiterpene lactone mix. On the other side, 11 persons reacted to the sesquiterpene lactone mix, but not to the Compositae mix. This means, that: 69 patients allergic to Compositae (58% of the 120 patients reacting to the Compositae mix) would have remained undiscovered if only the sesquiterpene lactone mix had been used for patch testing. 213 patients had been tested with each single plant extract of the Compositae mix. Among those with a strong positive reaction, two third reacted to feverfew and tansy, one third to German chamomile and yarrow, while less than 10% gave a response to arnica. The sensitivity of the mix was 0.76, its specificity 0.92. With regard to these results, the DKG has decided to include the Compositae mix in the patch test standard series
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
Contact allergy to Disperse Blue 106/124 mix in consecutive German, Austrian and Swiss patients
No full textCoupled three-state oscillators
No full textWe investigate globally coupled stochastic three-state oscillators, which we consider as general models of stochastic excitable systems. We compare two situations: in the first case the transitions between the three states of each unit 1 --> 2 --> 3 --> 1 are determined by Poissonian waiting time distributions. In the second case only transition 1 --> 2 is Poissonian whereas the others are deterministic with a fixed delay. When coupled the second system shows coherent oscillations whereas the first remains in a stable stationary state. We show that the coherent oscillations are due to a Hopf-bifurcation in the dynamics of the occupation probabilities of the discrete states and discuss the bifurcation diagram. (C) 2003 Elsevier Science B.V. All rights reserved
Contact vitiligo following a strong patch test reaction to triglycidyl-p-aminophenol in an aircraft industry worker: case report and review of the literature
No full textEpoxy resin systems (ERSs) are a frequent cause of occupational allergic contact dermatitis. A 50-year-old patient developed eczematous skin lesions on the back of his hands, lower arms and eye lids, 2 months after he had started working in aircraft construction. Patch tests showed positive reactions at day 3 to nickel sulfate, epoxy resin based on diglycidyl ether of bisphenol F (DGEBF) and 1,4-butanediol diglycidyl ether (1,4-BDDGE). The chemical triglycidyl-p-aminophenol (TGPAP) applied at 1% and 0.1% induced the strongest (+++ positive) reaction. About 4 months after the patch test with TGPAP, the patient presented with 2 circular depigmented spots in the former TGPAP-patch test areas. Dermatohistopathology confirmed the diagnosis of contact vitiligo
An examination of the matriculation outcomes of the Geier mandated pre-university programs
No full textThis study examined the effectiveness of the Geier pre-university program in achieving the stated goal of increasing the matriculation of African-American high school students to the historically white Tennessee Board of Regents schools. The researcher examined the matriculation records of 161 African-American students who attended the pre-university programs at Austin Peay State University, Middle Tennessee State University, and Tennessee Technological University. The Geier case was first filed in federal court in 1968. After more than ten years of litigation, in 1979, the United States Court of Appeals for the Sixth Circuit ordered that the University of Tennessee Nashville and Tennessee State University merge their institutions. Since the federal court\u27s decision to merge Tennessee State University and the University of Tennessee Nashville, the state of Tennessee has been under the guidelines of Geier v. Sundquist and its many court-ordered stipulations to eradicate all vestiges of de jure segregation. The 2001 Consent Decree for the Geier case mandated the creation of summer enrichment programs for African American high school students. The programs were to be held at the historically White Tennessee Board of Regents institutions. All statistical analyses were conducted at the p \u3e .05 level of significance. The researcher found that the participants in the summer enrichment programs had significantly higher rates of matriculation than the rate for Tennessee African-American high school graduates though rates were not consistent across the programs. Neither gender nor grade level completed at the time of program attendance had an effect on matriculation rates. Continued study of the participants in the program should be conducted to determine if differences can be found in the matriculation of students who attend the Geier pre-university program earlier in their high school careers
Der Edle Friedeman : Bey Hochansehnlicher/ Adelicher und Volckreicher Leichbestattung Des ... Herrn Friedemans von Selmnitz/ [et]c. Des ... Herrn Ernst Friedemans von Selmnitz/ Auf Strausfurth/ Vehra/ Steinburg und Kranichborn/ [et]c. Churfürstl. Durchl. zu Sachsen ... Raths/ Kammerherrens und Oberaufsehers der Graffschafft Mansfeld ... Sohns/ Als derselbe am 9. Martij dieses 1665. Jahres/ in der Kirchen zu S. Thomas in Leipzig/ in sein Ruhkämmerlein ... eingeleget worden/ In damahliger Leichenpredigt aus Sapien. IV, 7.*14. ... erwogen/ und ... zum Druck gegeben / von Martino Geiern/ Prof. P. und damals zu Leipzig Superint. itzo Churfürstl. Sächs. Ober-Hof-Pred. und KirchenRath
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