180,495 research outputs found
DELOCALIZED MOLECULAR-ORBITALS IN THE TRIMETALLIC THIOHETEROANION [S2WS2COS2SW2]2- - SPECTROSCOPIC AND CYCLIC VOLTAMMETRIC RESULTS
No full textMüller A, JOSTES R, FLEMMING V, POTTHAST R. DELOCALIZED MOLECULAR-ORBITALS IN THE TRIMETALLIC THIOHETEROANION [S2WS2COS2SW2]2- - SPECTROSCOPIC AND CYCLIC VOLTAMMETRIC RESULTS. INORGANICA CHIMICA ACTA-LETTERS. 1980;44(1):L33-L35
Mr. and Mrs. D.D. Flemming residence interior showing screen, Bellevue, Washington, 1953
No full textWritten on verso: Mr. and Mrs. D.D. Flemming, Bellevue, Washington, Architect Paul Kirk, 1953Copyright retained by donor. Please email [email protected] for more information.Scanned from a photograph print at 100 dpi in JPEG format at compression rate 3 and resized to 768x600 ppi. 201
Xaymaca fulvopulvis R D E Macphee & Clare Flemming 2003, new species
No full text<i>Xaymaca fulvopulvis</i>, new species <p>HOLOTYPE AND ONLY REFERRED SPECIMEN: AMNHM 268011, a left hemimandible retaining the incisor (presumptive i1) and excessively worn p4 (figs. 7–11). Recovered (but not then identified) in January 1995 by the senior author with the assistance of Lisa DeNault, Don McFarlane, and Alan and Adam Fincham.</p> <p>TYPE LOCALITY: Brown Dust Passage of Drum Cave, near Entrance #3 (fig. 1). Drum Cave, part of the ‘‘upper’’ sequence of the ~ 10 km Jackson’s Bay cave system (Fincham, 1997), is located on the south slope of Portland Ridge near Jackson’s Bay, in the southernmost part of Clarendon Parish, Jamaica. Entrance #3 is located at approximately 17°44'05̎N, 77°13'15̎W.</p> <p>ASSOCIATED FAUNA AND DISTRIBUTION: A provisional vertebrate faunal list for late Quaternary levels in the Portland Ridge (Jackson’s Bay) caves has been assembled by McFarlane et al. (2002). The birds, which include some extinct forms, were identified and are now under study by Storrs Olson (Smithsonian Institution). Mammalian taxa recovered in Brown Dust Passage are either extant or survived until very recently (MacPhee and Horovitz, in press).</p> <p> The most significant agent of small­mammal bone concentration in Jamaican cave deposits is the extant barn owl, <i>Tyto alba</i>. Since <i>Xaymaca</i> is evidently rare in such deposits, perhaps its size or behavior made it unlikely to be tracked by owls. <i>Quemisia gravis</i>, a relatively large species, is likewise known from very few specimens (McFarlane et al., 2000), although in Hispaniolan localities remains of other endemic rodents are encountered in great abundance (Woods, 1989b).</p> <p>ETYMOLOGY: Species name (‘‘of the brown dust’’) is a manufactured Latin adjective in the nominative singular in agreement with the genus name. Reference is to type locality, Brown Dust Passage of Drum Cave.</p> <p> DIAGNOSIS: Hystricognathous, lower premolar cylindriform and apparently hypselodont, showing marked apical hypertrophy. Other cheekteeth probably also cylindriform and hypselodont. Inferred features of cheektooth root development closest (among Antillean caviidans) to heptaxodontines <i>Amblyrhiza</i> and <i>Elasmodontomys</i>. Attributes of cheektooth ontogeny, alveolar construction, incisor procumbency, and other minor features are consistent with tentative allocation to Heptaxodontinae (family incertae sedis).</p> <p> The jaw is hystricognathous because its angular process is morphologically lateral to a parasagittal plane drawn through the incisor alveolar sheath (Landry, 1957). Cheektooth crown morphology not yet known. As may be seen plainly in figure 9 (bottom), the shape of the deeply striated p4 and the structure of the alveoli for m1–m 3 in <i>Geocapromys brownii</i> immediately rule out referral to this taxon, the only extant hystricognath on the island and the only endemic of any age in the new species’ body size range. Not an echimyid, because cheekteeth of all known species of Antillean spiny rats exhibit furcated roots, prominent cervix, and deep enamel infolds. Not a clidomyine, because all known clidomyines are far too large to be confused with the new taxon and in any case exhibit a substantially different tooth pattern.</p> <p> EXCAVATION RECORD AND DATING: Detailed discussion of the stratigraphy, dating protocols, and chronology of the secondary deposits in Drum and associated caves is presented by McFarlane et al. (2002). The following remarks pertain to discovery of the <i>Xaymaca</i> holotype.</p> <p> Pit 2, which yielded the holotype, was first opened in January 1995 and subsequently extended in July and September 1996. This relatively large amount of attention given to one site in one cave was warranted because the pit also yielded a well­preserved humerus of the extinct endemic monkey <i>Xenothrix mcgregori</i> and a number of jaws of the equally extinct endemic rice rat <i>Oryzomys antillarum</i>. The pit is located near Entrance #3, a major collapse feature (fig. 1). Excavations exposed ~ 1 m of deposits that have entered the cave through the collapse. A loose surface layer of limestone fragments, cave earth, and modern owl pellet debris 20 cm thick is underlain by a discontinuous calcite layer (<2 cm). This calcite caps a distinctive and sharply delineated dark­brown layer of subfossil bat guano 34 cm thick, designated ‘‘Guano I’’, beneath which 6 cm of limestone fragments, clay, and huge concentrations of bone extend down to a second guano layer (3 cm thick) designated ‘‘Guano II’’. Beneath this, material extends to a solid calcite floor at 125 cm below surface, beyond which excavation did not continue.</p> <p> The enormous quantity of lightly cement­ ed small bones present in parts of Pit 2 formed a ‘‘bone cake’’ that had to be broken out and divided by hand. In this situation, dry screening was the only feasible method of recovering specimens. On the screen, representative samples of lizards, snakes, bats, and <i>Geocapromys</i> were collected by handpicking, but much material was also simply bagged for later identification. The jaw which became the holotype specimen of <i>Xaymaca</i> was missed on the screen and was not recognized as distinctive until we sorted the material at the AMNH in New York.</p> <p> Bone is present throughout the Brown Dust Passage section, but bone recovered from the Guano I and II horizons (including the <i>Xaymaca</i> holotype) is invariably and characteristically stained a deep brown color not seen in other layers. Thus, although it is known that AMNHM 268011 came from a ~12­cm interval between the bottom of Guano I and the bottom of the thin Guano II horizon, its stratigraphic position cannot be fixed more firmly. Fortunately, however, its temporal position can be fixed with considerable accuracy. Radiocarbon dating of the acid­insoluble organic component (crude chitin) of Guano I provided isotopically corrected dates of 10,250 ± 80, 11,050 ± 70, and 11,260 ± 80 BP in correct stratigraphic sequence; similarly, Guano II dated to 11,980 ± 80 BP (see McFarlane et al., 2002). Thus although there is some uncertainty about the exact position of the holotype within Pit 2, its age can be fixed as lying between 10,090 – 11,420 BP (2 sigma error), or the terminal part of the late Pleistocene. Improved constraints on the ‘‘last occurrence’’ date for Fig. 7.</p>Published as part of <i>MacPhee, R. D. E. & Flemming, Clare, 2003, A Possible Heptaxodontine and Other Caviidan Rodents from the Quaternary of Jamaica, pp. 1-43 in American Museum Novitates 3422</i> on pages 16-17, DOI: 10.1206/0003-0082(2003)422<0001:aphaoc>2.0.co;2, <a href="http://zenodo.org/record/5056742">http://zenodo.org/record/5056742</a>
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dr. Tony Charles, Jim Candown, David Flemming, and Dr. Bill Wicken, ca. 1995
No full textcolor photographExcellent conditionFrom L to R: Dr. Tony Charles, professor with the School of the Environment and Sobey School of Business at Saint Mary's University, Jim Candow, Parks Canada, David Flemming, Director of the Maritime Museum; and Dr. Bill Wicken
Francis L. Carroll, Edward M. Brown, John T. McNally, Edward C.O'Leary, John George Flemming, Visit During McNally Construction, 1950
No full textdigital photograph (jpeg)Excellent condition.L-R: Francis L. Carroll, Edward M. Brown, John T. McNally, Edward C.O'Leary, John George Flemming during McNally construction in 1950
"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.
Fig. 19. Isolated p4 in A Possible Heptaxodontine and Other Caviidan Rodents from the Quaternary of Jamaica
No full textFig. 19. Isolated p4 (AMNHP 140816) of capromyid Isolobodon portoricensis from Salt River Bay, St. Croix (?Amerindian site), SEMs at low and high magnification. (A) Transverse section at low magnification, showing distribution of enamel (en), dentine (de), and cementum (ce). (B) Closeup of large boxed area in A, showing cementum and enamel. (C) Closeup of small boxedPublished as part of MacPhee, R. D. E. & Flemming, Clare, 2003, A Possible Heptaxodontine and Other Caviidan Rodents from the Quaternary of Jamaica, pp. 1-43 in American Museum Novitates 3422 on page 34, DOI: 10.1206/0003-0082(2003)4222.0.co;2, http://zenodo.org/record/505674
LNA guanine and 2,6-diaminopurine. Synthesis, characterization and hybridization properties of LNA 2,6-diaminopurine containing oligonucleotides
No full textChristoph Rosenbohm, Daniel Sejer Pedersen, Miriam Frieden, Flemming R. Jensen, Susan Arent, Sine Larsen and Troels Kochhttp://www.elsevier.com/wps/find/journaldescription.cws_home/129/description#descriptio
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
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