1,720,959 research outputs found
Scanning tunneling microscopy imaging of uncoated biological material
No full textPT: J; CR: AMREIN M, 1989, SCIENCE, V243, P1708 BEEBE TP, 1989, SCIENCE, V243, P370 BINNIG G, 1986, REV SCI INSTRUM, V57, P1688 BLACKFORD BL, 1987, REV SCI INSTRUM, V58, P1343 BLACKFORD BL, 1988, J MICROSC-OXFORD, V152, P237 BLACKFORD BL, 1989, ULTRAMICROSCOPY, V26, P427 DAHN DC, 1988, J VAC SCI TECHNOL A, V6, P548 JAMES MNG, 1986, NATURE, V319, P33 JERICHO MH, 1987, REV SCI INSTRUM, V58, P1349 JERICHO MH, 1989, J APPL PHYS, V65, P5237 LINDSAY SM, 1989, SCIENCE, V244, P1063 MAMIN HJ, 1986, PHYS REV B, V34, P9015 MICHAEL NG, 1985, BIOCHEMISTRY-US, V24, P3701 NATALIA S, 1984, J BIOCHEM-TOKYO, V259, P11353 STEWART M, 1985, J MOL BIOL, V183, P509; NR: 15; TC: 25; J9: J VAC SCI TECHNOL A; PG: 6; GA: CL594Source type: Electronic(1
Scanning tunneling microscopy of unbroken chloroplasts
No full textMainsbridge and Thundat [J. Vac. Sci. Technol. B 9 (1991) 1259] recently reported STM images of chloroplast components. The goal of our work was to investigate the effects of sample preparation and imaging conditions, and to more clearly identify some of the structures that appear in chloroplast images. We have imaged gold-coated chloroplasts in air, and bare chloroplasts in solution. Results obtained include images of whole chloroplasts several micrometers in diameter, and images which show molecular-scale structure on the chloroplast outer membrane.PT: J; CR: BARNES SH, 1984, MICRON MICROSC ACTA, V15, P187 DOWLING TE, 1990, MOL SYSTEMATICS GUCKENBERGER R, 1991, J VAC SCI TECHNOL B, V9, P1227 HABERLE W, 1991, J VAC SCI TECHNOL B, V9, P1210 HALLIWELL B, 1984, CHLOROPLAST METABOLI JERICHO MH, 1987, REV SCI INSTRUM, V58, P1349 JERICHO MH, 1989, J APPL PHYS, V65, P5237 JERICHO MH, 1990, J VAC SCI TECHNOL A, V8, P661 MAINSBRIDGE B, 1991, J VAC SCI TECHNOL B, V9, P1259 MANTOVANI JG, 1990, J MICROSC-OXFORD, V158, P109 MARGULIS L, 1970, ORIGIN EUKARYOTIC CE PAIN D, 1988, NATURE, V331, P232; NR: 12; TC: 6; J9: ULTRAMICROSCOPY; PN: Part B; PG: 6; GA: JM423Source type: Electronic(1
Tunneling microscopy of NbSe2 in air
No full textPT: J; CR: BANDO H, 1987, JPN J APPL PHYS PT 2, V26, L41 BINNIG G, 1982, PHYS REV LETT, V49, P57 BRYANT A, 1986, APPL PHYS LETT, V48, P832 FELDMAN JL, 1976, J PHYS CHEM SOLIDS, V37, P1141 FELDMAN JL, 1981, J PHYS CHEM SOLIDS, V42, P1029 JERICHO MH, 1980, PHYS REV B, V22, P4907 JERICHO MH, 1987, REV SCI INSTRUM, V58, P1349 MAMIN HJ, 1986, PHYS REV B, V34, P9015 PETHICA JB, 1986, IBM J RES DEV, V30, P455 RAO GVS, 1979, PHYSICS CHEM MATERIA, P99 SOLER JM, 1986, PHYS REV LETT, V57, P444 TERSOFF J, 1986, PHYS REV LETT, V57, P440 TOKUMOTO H, 1986, JPN J APPL PHYS, V25, L621; NR: 13; TC: 14; J9: J APPL PHYS; PG: 4; GA: L5219Source type: Electronic(1
STM study of silver intercalation into 2H‐NbSe2 crystals
No full textPT: J; CR: DAHN DC, 1988, J APPL PHYS, V63, P315 DAHN JR, 1981, SOLID STATE COMMUN, V40, P245 DAUMAS N, 1969, CR ACAD SCI C CHIM, V268, P373 FOLINSBEE JT, 1981, CAN J PHYS, V59, P1267 FOLINSBEE JT, 1983, CAN J PHYS, V61, P988 FOLINSBEE JT, 1986, MATER RES BULL, V21, P961 JERICHO MH, 1987, REV SCI INSTRUM, V58, P1349 KALUARACHCHI D, 1983, PHYS REV B, V28, P3663 KIRCZENOW G, 1988, CAN J PHYS, V66, P39 MAMIN HJ, 1986, PHYS REV B, V34, P9015; NR: 10; TC: 6; J9: J MICROSC-OXFORD; PN: Part 1; PG: 7; GA: T9506Source type: Electronic(1
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
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