131,034 research outputs found
Diploglossus Wiegmann 1834
No full textGenus Diploglossus Wiegmann, 1834 Neotropical Forest Lizards Figs. 22–23 Diploglossus Wiegmann, 1834:36. Type species: Tiliqua fasciatus Gray, 1831:71, by subsequent designation (Fitzinger 1843:23). Microlepis Gray, 1839:334. Type species: Microlepis undulata Gray, 1839:334, by original designation. Camilia Gray, 1845:118. Type species: Tiliqua jamaicensis Gray, 1839:293, by original designation. Diagnosis. Species of Diploglossus have (1) claw sheath, present or absent, (2) contact between the nasal and rostral scales, present or absent, (3) scales in contact with the nasal scale, 5–6, (4) postnasal scales, 1–2, (5) position of the nostril in the nasal scale, posterior, (6) keels on dorsal body scales, present or absent, (7) digits per limb, five, (8) longest toe lamellae, 8–18, (9) dorsal scale rows, 88–99, (10) relative head width, 9.20–19.0, (11) relative rostral height, 49.6–62.1, (12) relative frontonasal length, 2.11–4.44, (13) relative interparietal distance, 0–0.658, (14) relative axilla-groin distance, 52.8–76.6. From Ophiodes, we distinguish Diploglossus by the digits per limb (five versus none, because of lack of limbs in Ophiodes), number of lamella on longest toe (8–18 versus none, because of lack of limbs in Ophiodes), and the number of dorsal scales (88–99 versus 130–171). Content. Ten species (Table 3): Diploglossus delasagra, D. fasciatus, D. garridoi, D. lessonae, D. microlepis, D. millepunctatus, D. monotropis, D. montisserrati, D. nigropunctuatus, and D. pleii. Distribution. Diploglossus occurs throughout Cuba, Puerto Rico, and Montserrat, as well as in Lower Central America and South America including Malepo Island (Fig. 23). The map does not include the distribution of Diploglossus microlepis, which is unknown. Etymology. The generic name is a masculine noun formed from the Latin words diplo (two) and glossus (tongue), meaning two tongues, referencing the two forms of papillae found on the anterior and posterior regions of the tongue. Remarks. Diploglossus is a monophyletic clade with a Bayesian support value of 100% and a ML bootstrap value of 81% (Fig. 2). Our molecular phylogeny includes six of the ten species of Diploglossus (D. delasagra, D. garridoi, D. lessonae, D. monotropis, D. nigropunctuatus, and D. pleii).Published as part of Schools, Molly & Hedges, S. Blair, 2021, Phylogenetics, classification, and biogeography of the Neotropical forest lizards (Squamata, Diploglossidae), pp. 201-257 in Zootaxa 4974 (2) on pages 236-237, DOI: 10.11646/zootaxa.4974.2.1, http://zenodo.org/record/477544
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
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
Remote sensing reflectance measured at discrete underwater profile stations in the North Sea during RV HEINCKE cruise HE462 from 30 April to 7 May 2016
No full textWe present a data set on remote sensing reflectance (RRS) at 1nm resolution from 350 to 800nm obtained from measurements in the North Sea and Sogne Fjord from 30 April to 7 May 2016. For the measurements we used radiometric hyperspectral (3.3 nm sampling, 10 nm FWHM) underwater profile measurements down to the 0.1 % light level using RAMSES (TriOS GmbH, Germany) sensors which measured depth resolved the upwelling radiance and downwelling irradiance, both corrected by incident sunlight fluctuations with a second RAMSES sensor measuring the above water downwelling irradiance. The later sensor data were also used to finally calculate RRS. We followed the protocol by Mueller et al. (2003) further modified by Matsuoka et al. (2007) and Stramski et al. (2008), as described for our instrument set-up in Taylor et al. (2011). Our method is further described and assessed for its uncertainty in Tilstone et al. (2020). The same campaign was sampled for optical constituents hyperspectral absorption data in Bracher et al. (2021a-d) and for phytoplankton pigments in Bracher and Wiegmann (2019)
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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
Scholarly Communication and Publishing Lunch and Learn Talk #11: The ULS Open Access Author Fee Fund
No full textAt the May 2014 talk, you will learn about the ULS Open Access Author Fee Fund--what it is, why we do it, how it works, and how the program is going so far
Fig. 2. Myolepta graciliventris Wiegmann, 1986 in New species of Myolepta Newman, 1838 (Diptera, Syrphidae) from the Indomalayan Realm
No full textFig. 2. Myolepta graciliventris Wiegmann, 1986, ♂, holotype (USNMENT01754756). A. Habitus, dorsal view. B. Habitus, lateral view. C. Head, frontal view. D. Labels. Scale bars: 1 mm.Published as part of Mengual, Ximo, 2022, New species of Myolepta Newman, 1838 (Diptera, Syrphidae) from the Indomalayan Realm, pp. 97-120 in European Journal of Taxonomy 833 on page 99, DOI: 10.5852/ejt.2022.833.1885, http://zenodo.org/record/695821
Macrobrachium olfersii Wiegmann 1836
No full textMacrobrachium olfersii (Wiegmann, 1836) Fig. 14 A–D Palaemon olfersii Wiegmann, 1836: 150. Macrobrachium olfersii, Escobar, 1979: 118.— Williams, 1984: 70.— Abele & Kim, 1989: 10.— Nizinski, 2003: 103. Macrobrachium olfersi, Holthuis, 1952: 95.— Martínez, 1973: 7.— Rodríguez, 1980: 120.— Rodríguez, 1981: 45, 47.— Melo, 2003: 366. (For detailed synonymy refer to Holthuis, 1952). Material examined. Magdalena: Santa Marta. Buritaca, 20 m asl, 17 Nov 1998, leg. R. Casallas & A. J. Bernal, 9 males, 2 females 1 ovigerous, 1 juvenile, MLS 18.— SW, Guachaca River, 10 - 30 m asl, Dec 1993, leg. R. Contreras, 1 male, 10 juveniles, CRBMUV 93005. — Parque Nacional Natural Tayrona, Gayraca stream, 1 male, INV 771.— Parque Nacional Natural Tayrona, Nenguange, 2 males, 1 ovigerous female, INV 773, 979.— Mamatoco stream, 18 Feb 1976, 3 males, 10 females, 5 ovigerous, INV 772.— Mamatoco stream, 18 Mar 1976, leg. G. Manjarréz, 5 males, 1 ovigerous female, INV 975. La Guajira: Riohacha. Ranchería River, 40 m asl, 7 Oct 2004, Leg. C. Castellanos, 5 males, 3 ovigerous females, ICN-MHN-CR 2209. Diagnosis Rostrum nearly straight, distal part slightly recurved downward, shorter than scaphocerite, as long as antennular peduncle; upper margin with 11 to 14 teeth regularly spaced, including 4-5 teeth completely post orbital, lower margin with 2 to 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, inner pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with distal portion of carpus. Second pair of pereopods prominent, different in shape and size, covered with conspicuous spines and long setae, the larger second pereopod overreaching scaphocerite with ca. 1 / 4 of merus; merus 0.94 to 0.95 x carpus length, and 0.72 to 0.95 x palm length; carpus 2.45 to 2.57 x as long as wide, and 0.76 to 1.0 x palm length; palm prominent with ventral margin convex, external and internal surfaces with rows of spines and conspicuous setae, ventral margin with row of spines which are decreasing in size distally, 2.61 to 3.15 x as long as wide; fingers gaping when closed, thickly pubescent in recess, 0.91 to 1.04 x palm length, cutting edge of each finger with a tooth on midproximal portion, followed by denticles to its distal portion. Size. The largest male TL 88.9 mm, CL 29.4 mm; the largest female TL 62.3 mm, CL 17.6 mm; 11 ovigerous females were examined: TL 36.7 to 50.0 mm, CL 9.6 to 14.9 mm, with small and numerous eggs. Remarks This species is closely related to Macrobrachium faustinum (De Saussure, 1857). The two can be distinguished by differences in the second pair of pereopods in adult males. The spines of the ventral margin’s row of the palm in M. faustiunum are larger proximal and distally but smaller on the midportion; to the contrary, they diminish in size distally in M. olfersii. In addition, the spines and pubescence on the external and internal surface of the palm and on the cutting edge of the fingers are more conspicuous in M. olfersii than in M. faustiunum. Some specimens of Macrobrachium olfersii were found at INCODER collection: 4 males, the largest male was LT 72.0 mm, CL 24.4 mm. These specimens were not recorded in this article because they lack location data. They may correspond to specimens reported by Martínez (1973) and deposited at INCODER. The male of Macrobrachium olfersii, from Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, department of Magdalena (ICN-MHN-CR 0532), reported by Galvis (1986) are actually M. crenulatum.Published as part of Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, pp. 1-44 in Zootaxa 1456 on pages 27-28, DOI: 10.5281/zenodo.17632
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