126,858 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
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
Untersuchungen zum didaktischen Ort der Booleschen Algebra im Rahmen einer modernen elementaren Algebra
No full textWinkelmann B. Untersuchungen zum didaktischen Ort der Booleschen Algebra im Rahmen einer modernen elementaren Algebra. Bielefeld; 1974
Money Illusion Under Test
No full textMuch progress has been made in recent years in developing and applying a direct measure of utility using survey questions on satisfaction with income and with life in general. In this paper we apply this new type of measurement to the study of money illusion. Using data from the German Socio-Economic Panel for the years 1993 to 2003, we cannot reject the hypothesis of no money illusion.North-South, cost-of-living, subjective well-being, fixed effects
Zullobalanus santamariaensis Buckeridge & Winkelmann, sp. nov.
No full text<i>Zullobalanus santamariaensis</i> Buckeridge & Winkelmann sp. nov. <p>(Figures 2–3)</p> <p> <b>Diagnosis.</b> <i>Zullobalanus</i> with shell lacking external apico-basal ribbing; tergum only weakly reflexed apically, but possessing extensive, well-formed crests for depressor muscle attachment; scutum with moderately produced articular ridge and moderate to weak adductor muscle scar.</p> <p> <b>Distribution and age.</b> Azores; Late Miocene – Early Pliocene.</p> <p> <b>Type material.</b> Holotype containing 2 sample compositions: DBUA-F 536.1, complete shell (3.23 mm in height and 3.39 mm in basal diameter), carina (5.44 mm in height), carinolatus, (5.36 mm in height), latus (1.84 mm in height), rostrum (2.59 mm in height), scutum (2.50 mm in articular margin), tergum (3.44 mm in articular margin); DBUA-F 536.2, complete shell (6.31 mm in height and 6.63 mm in basal diameter), carina (4.89 mm in height), carinolatus, (4.79 mm in height), latus (3.36 mm in height), rostrum (2.30 mm in height), scutum (2.43 mm in articular margin), tergum (3.61 mm in articular margin); Santa Maria, Malbusca outcrop (25°4'7.04"W, 36°55'45.53"N [30 m asl]); S.P. Ávila & K. Winkelmann, 22–29 June 2008. Paratypes all with same locality, collectors and date as the holotype: Natural History Museum Berlin: MB.A 1733, MB.A 1734; Natural History Museum Vienna: NHMW 2010/0088/0001, NHMW 2010/0088/0002; Royal Belgian Institute of Natural Sciences Brussels: IRSNB 7255a–g, IRSNB 7256a–g; Natural History Museum London: NHM IC 549 – NHM IC 562; Muséum National d’Histoire Naturelle Paris: MNHN A32053, MNHN A32054.</p> <p> <b>Description.</b> Shell conic, height approximating basal diameter; exterior rough, longitudinal ribbing weak to absent, lateral growth lines weak; orifice rhomboidal (Fig. 2 A, B); interior with strong ribbing, with minor bifurcation of some ribs near basis; rib cross-section showing simple arborescent interlaminate structures (Fig. 2 B, C); sheath smooth, well developed, pendant, occupying up to 50% of height of inner surface; basis firmly interlocking with parietal ribs; radii moderately narrow, with oblique summits, growth lines parallel to basis crossed by fine growth striae parallel to alar abutment (Fig. 2 B); alae with marginal extensions, summits almost horizontal (Fig. 2 B).</p> <p>Scutum (Fig. 3 A, B) very weakly reflexed apically; exterior with strong transverse growth ribs crossed by weak apico-basal striae; interior with articular ridge moderately produced, slightly pendant basally; adductor ridge weak, broadly rounded; adductor muscle scar moderate to weak, pit for lateral depressor muscles well formed lacking any obvious muscle attachment crests. Tergum (Fig. 3 C, D) moderately elongate, spur wellformed, removed from basi-scutal angle by own width and extending beyond same angle by approximately its own width, furrow well-formed distally, externally with well spaced growth lines, in some areas (especially basally), fine apico-basal striae present; interior with longitudinal furrow on articular margin wide, open, shallow, smooth except for weak growth striae; articular ridge well-formed, concave towards articular margin; crests for depressor muscles well developed basally, extending as a zone of raised papillae nearer the apex; articular ridge gently curved to extend slightly beyond a broadly concave basal margin; apex with approximately 3–4 strong transverse growth lines in adults.</p> <p> <b>Occurence at Santa Maria Island.</b> All the Late-Miocene and Early-Pliocene outcrops studied in Santa Maria contained the endemic barnacle <i>Zullobalanus santamariaensis</i> <b>sp. nov.</b> Most specimens were found at Malbusca and at “Pedra-que-Pica” outcrops. The beds at “Pedra-que-Pica” contained some well preserved but rare barnacles with opercula cemented to diverse marine molluscs (e.g. <i>Gigantopecten latissimus</i> (Brocchi, 1814) and <i>Lopha plicatuloides</i> (Mayer, 1864)); the beds at Malbusca contained a number of loose opercula in a sandy matrix. At Cré outcrop, rare single walls as well as opercula were present. In the more lithified marine sediments of Figueiral and Ponta do Castelo, barnacle fragments were only observed on eroded surfaces. At Ponta dos Frades, a few barnacle fragments were found together with well preserved micro-molluscs on eroded bottom surfaces. Nevertheless, we detected fragments of <i>Zullobalanus santamariaensis</i> <b>sp. nov.</b> in every sampled Miocene/Pliocene outcrop.</p> <p> <b>Remarks and affinities.</b> There is an extensive archaeobalanid fauna known from western Europe (Carriol, 2008) and the eastern seaboard of North America (Zullo 1984; Zullo & Kite 1985; Zullo & Perreault 1989; Zullo & Portell 1991). Of these, species of <i>Actinobalanus</i> are distinguished from this taxon by their porous bases; <i>Hesperibalanus</i>, the terga of which lack the well-formed nodose papillae on the internal surface and the broad spur; <i>Solidobalanus</i> by the externally smooth compartments; and <i>Lophobalanus</i> by their very narrow radii.</p> <p> <i>Zullobalanus santamariaensis</i> <b>sp. nov.</b> differs from all other <i>Zullobalanus</i> species by a lack of clearly formed external ribbing on the shell. Although there are some weak “ribs” these are somewhat obscured by the generally rough surface of the shell. The weakly reflexed scutal apex is close to that seen in the Australian species <i>Zullobalanus australiae victoriae</i> (Buckeridge, 1983) and in most respects it is closest to this species. In addition to the lack of external ribbing, it differs from <i>Z. australiae victoriae</i> by the presence of numerous well-formed crests for depressor muscles on the tergum.</p> <p> The scutal articular ridge is often basally pendant in larger specimens of <i>Zullobalanus</i> species (Buckeridge 1983), and although this has not been clearly seen in the material available, we should be mindful that all larger scuta are isolated and since shell disarticulation, have been abraded, as such wearing away delicate extensions.</p> <p> <b>Etymology.</b> Geographic: Island of Santa Maria (noun in apposition).</p>Published as part of <i>Winkelmann, Kai, Buckeridge, John S., Costa, Ana Cristina, Dionísio, Maria Ana Manso, Medeiros, André, Cachão, Mário & Ávila, Sérgio P., 2010, Zullobalanus santamariaensis sp. nov., a new late Miocene barnacle species of the family Archaeobalanidae (Cirripedia: Thoracica), from the Azores, pp. 33-44 in Zootaxa 2680</i> on pages 36-39, DOI: <a href="http://zenodo.org/record/199324">10.5281/zenodo.199324</a>
EBSD Kikuchi Pattern Analysis, Silicon 15kV
No full textSupplementary Data and Images for Si EBSD pattern analysis as presented in
A. Winkelmann, T.B. Britton, G. Nolze "Constraints on the effective electron energy spectrum in backscatter Kikuchi diffraction", Physical Review B (2019
On a quaternionic Picard theorem
No full textThe classical theorem of Picard states that a non-constant holomorphic
function can avoid at most one value.
We investigate how many values a
non-constant slice regular function of a quaternionic variable
may avoid
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
Dr. Edwin Wright Collection: Author Unknown
No full textNotes - The author relates several short stories about his neighbours including Alex McDonell, homesteading and life around Meanook and Athabasca (1 page
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