79,731 research outputs found
Register / bearbeitet von Holger Hansen
No full textREGISTER / BEARBEITET VON HOLGER HANSEN
Bibliotheca Germanorum erotica & curiosa (-)
Register / bearbeitet von Holger Hansen (Register) ([1])
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The significance of the Hansen Ideal space frame
No full textKnown and unknown properties of Hansen Ideal coordinates are summarized. It is shown that the ideal space frame is a general and necessary component of basic celestial mechanics and astrodynamics, as well as of any theory of motion. A typical consequence is the intimate correlation of the Hansen frame with the Lagrange constraint within the method of the variation of the parameters. The use of observations in the ideal frame may allow conclusions on the intergalactic fundamental coordinate system
Don R. Evans, Charles B. Holts, and Ren Hansen, 1954
No full textBlack and white photograph of Don R. Evans, Charles B. Holts, and Ren Hansen, 1954
Retinal function in X-linked juvenile retinoschisis
No full textPURPOSE. To assess retinal function in young patients with X-linked juvenile retinoschisis (XLRS), a disorder that is known to alter ERG postreceptor retinal components and also possibly photoreceptor components. METHODS. ERG responses to full-field stimuli were recorded under scotopic and photopic conditions in 12 XLRS patients aged 1 to 15 (median 8) years. A- and b-wave amplitudes and implicit times were examined over a range of stimulus intensities. Rod and cone photoreceptor (SROD, RROD, SCONE, RCONE) and rod-driven postreceptor (log r, VMAX) response parameters were calculated from the a- and b-waves. Data from XLRS patients were evaluated for significant change with age. RESULTS. A- and b-wave amplitudes were smaller in XLRS patients compared with controls under both scotopic and photopic conditions. Saturated photoresponse amplitude (RROD), postreceptor b-wave (log r), and saturated b-wave amplitude (VMAX) were significantly lower in XLRS patients than in controls; SROD did not differ between the two groups. SCONE and RCONE values were normal. In XLRS patients, neither a- and b-wave amplitudes nor calculated parameters (SROD, RROD, log r, VMAX, SCONE, and RCONE) changed with age. CONCLUSIONS. In these young XLRS patients, RROD and a-wave amplitudes were significantly smaller than in controls. Thus, in addition to XLRS causing postreceptor dysfunction, an effect of XLRS on rod photoreceptors cannot be ignored
Connor (W. R.) - Hansen (M. H.) - Raaflaub (K. A.) - Strauss (B. S.). Aspects of Athenian Democracy
No full textSalmon Pierre. Connor (W. R.) - Hansen (M. H.) - Raaflaub (K. A.) - Strauss (B. S.). Aspects of Athenian Democracy. In: Revue belge de philologie et d'histoire, tome 71, fasc. 1, 1993. Antiquité — Oudheid. p. 167
The effect of leading edge tubercle geometry on the performance of different airfoils
No full textK. L. Hansen, R. M. Kelso and B. B. Dallyhttp://www.exhft-7.agh.edu.p
Letter from Arno B. Cammerer to J. R. Eakin
No full textLetter from Arno B. Cammerer to J. R. Eakin describing the procedure for purchasing Bright Angel Trail
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
Megastygarctides gerdae Hansen & Kristensen 2006
No full text147. <i>Megastygarctides gerdae</i> Hansen & Kristensen, 2006 <p> <i>Megastygarctides gerdae</i> sp. nov. (Hansen & Kristensen 2006)</p> <p> <b> <i>Terra typica</i>: Arabian Sea (Saudi Arabia, Asia)</b> </p> <p> <b>Arabian Sea:</b></p> <p> • <b>27°50′N, 48°54′E; 0.46–1.07 m above ISLW (Indian Spring Low Water)</b> / 0 m bsl: <b>[FAO51] Type Locality:</b></p> <p> Saudi Arabia, Eastern Region, Persian Gulf, Ras Al Tanajib, intertidal. <b>Hansen & Kristensen (2006) Record numbers (Sea/Ocean classification):</b> Arabian Sea: 1; <b>total: 1. Record numbers (FAO classification):</b> FAO51: 1; <b>total: 1.</b></p> <p> <b>Remarks:</b> This is a relatively recently described intertidal species known only from the type locality.</p>Published as part of <i>Kaczmarek, Łukasz, Bartels, Paul J., Roszkowska, Milena & Nelson, Diane R., 2015, The Zoogeography of Marine Tardigrada, pp. 1-189 in Zootaxa 4037 (1)</i> on page 130, DOI: 10.11646/zootaxa.4037.1.1, <a href="http://zenodo.org/record/233519">http://zenodo.org/record/233519</a>
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