1,725,665 research outputs found
Linked collectors and determiners for: The Trichoptera of Panama. XVIII. Twelve first country records of macrocaddisflies (Insecta, Trichoptera) from the Republic of Panama.
No full textNatural history specimen data linked to collectors and determiners held within, "The Trichoptera of Panama. XVIII. Twelve first country records of macrocaddisflies (Insecta, Trichoptera) from the Republic of Panama". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/ab04efc0-fc2f-4979-b793-e83df17d0351">https://bionomia.net/dataset/ab04efc0-fc2f-4979-b793-e83df17d0351</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ab04efc0-fc2f-4979-b793-e83df17d0351">https://gbif.org/dataset/ab04efc0-fc2f-4979-b793-e83df17d0351</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Bolus Herbarium: Bryophyte and Ericaceae (1641-2016).
No full textNatural history specimen data linked to collectors and determiners held within, "Bolus Herbarium: Bryophyte and Ericaceae (1641-2016)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/4887f81b-b7b1-4979-9096-1b3a89ba71b2">https://bionomia.net/dataset/4887f81b-b7b1-4979-9096-1b3a89ba71b2</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/4887f81b-b7b1-4979-9096-1b3a89ba71b2">https://gbif.org/dataset/4887f81b-b7b1-4979-9096-1b3a89ba71b2</a>. Formatted as a Frictionless Data package
Linked collectors and determiners for: Drosophila (Sophophora) carrolli n. sp., a new species from Brunei, closely related to Drosophila (Sophophora) rhopaloa Bock & Wheeler, 1972 (Diptera: Drosophilidae).
No full textNatural history specimen data linked to collectors and determiners held within, "Drosophila (Sophophora) carrolli n. sp., a new species from Brunei, closely related to Drosophila (Sophophora) rhopaloa Bock & Wheeler, 1972 (Diptera: Drosophilidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/080903f9-fb09-4979-ab23-db718283e177">https://bionomia.net/dataset/080903f9-fb09-4979-ab23-db718283e177</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/080903f9-fb09-4979-ab23-db718283e177">https://gbif.org/dataset/080903f9-fb09-4979-ab23-db718283e177</a>. Formatted as a Frictionless Data package
Portraits of 4979 Otawara and 140 Siwa, the two fly-by targets of the Rosetta mission
No full textPortraits of 4979 Otawara and 140 Siwa, the two fly-by targets of the Rosetta missio
Linked collectors and determiners for: Drosophila (Sophophora) carrolli n. sp., a new species from Brunei, closely related to Drosophila (Sophophora) rhopaloa Bock & Wheeler, 1972 (Diptera: Drosophilidae).
No full textNatural history specimen data linked to collectors and determiners held within, "Drosophila (Sophophora) carrolli n. sp., a new species from Brunei, closely related to Drosophila (Sophophora) rhopaloa Bock & Wheeler, 1972 (Diptera: Drosophilidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/080903f9-fb09-4979-ab23-db718283e177">https://bionomia.net/dataset/080903f9-fb09-4979-ab23-db718283e177</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/080903f9-fb09-4979-ab23-db718283e177">https://gbif.org/dataset/080903f9-fb09-4979-ab23-db718283e177</a>. Formatted as a Frictionless Data package
The 2000 Rosetta asteroid targets observational campaign: 140 Siwa and 4979 Otawara
No full textPhotometric and spectroscopic observations of 140 Siwa and
4979 Otawara, targets of the Rosetta mission, have been carried out at
the European Southern Observatory (ESO, Chile).
The complete lightcurves in V and R of both asteroids and the Siwa
spectrum in the range 0.95-2.52 μm have been obtained. We
determined the precise synodic rotational period of 140 Siwa (18.495 h ±
0.005 h) and we confirmed the synodic rotational period of 4979 Otawara
(2.707 h ± 0.005 h). The phase function has been obtained for both
asteroids, allowing the determination of the HV and GV parameters:
for 4979 Otawara HV= 14.62 mag, GV=0.34; for 140 Siwa HV=8.34 mag, GV=0.17. The near infrared spectrum of Siwa does not show any spectral
feature, which is consistent with a C/P type object
4979 Otawara: flyby target of the Rosetta mission
No full textAn international observing campaign was organized to determine the physical and chemical characteristics of asteroid 4979 Otawara, which is the first target of the Rosetta mission (flyby on July 10, 2006). Knowledge of the physical parameters of the flyby targets is required for both refinement of the design of the spacecraft and the instrument payload, and optimization of the mission trajectory and scenarios. We present the results of observations obtained from December, 1998 through March, 1999. The spectral classification of 4979 Otawara could be either a pyroxene and/or olivine-rich S-type asteroid or a V-type asteroid, a member of the Vesta dynamical family. Further observations are needed in order to discriminate between the two spectral types. The synodic rotation period of Otawara is Psyn = 2.707 +/- 0.005 hr. The lower limit for the axial ratio of the enveloping ellipsoid is a/b >= 1.3. The circular effective radius is 2.0 or 1.3 km in the case of an S-type or a V-type asteroid, respectively. A lower limit on its density is obtained: rho min >= 1.9 g cm-3 if we assume that Otawara is an aggregate or rubble pile object. However, if Otawara is a single solid body, no constraint can be set on its density. 4979 Otawara is a small, fast rotating asteroid (FRA) and hence, will be a particularly interesting target to be studied from a spacecraft, since no fast rotator has been visited yet. partly based on observations carried out at the European Southern Observatory (ESO) of La Silla, Chile, and at Steward Observatory, University of Arizona, Tucson, AZ USA
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
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