1,721,041 research outputs found
STRAIN AND ALLOYING EFFECTS ON THE ELECTRONIC AND VIBRATIONAL PROPERTIES OF INYAL1-YAS ON INP
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Strongly driven semiconductor microcavities: From the polariton doublet to an AC Stark triplet
No full textWe report femtosecond pump and probe experiments in a semiconductor microcavity containing quantum wells. At high pump fields, the exciton-polariton Rabi doublet changes into a triplet structure. The triplet splitting increases as the square root of the input intensity. The transmitted probe intensity is modulated with the corresponding frequency Versus pump-probe delay. The experimental results are discussed in terms of Mollow spectra of a saturated transition of a two-level system.LOEQSCI-SB-RHUsing Smart Source Parsing; 25 May p; Ecole Polytech Fed Lausanne, PHB Ecublens, Inst Micro & Optoelect, CH-1015 Lausanne, Switzerland. Univ Cagliari, Dipartimento Sci Fisiche, I-09124 Cagliari, Italy. Univ Cagliari, Ist Nazl Fis Mat, I-09124 Cagliari, Italy. Quochi, F, Ecole Polytech Fed Lausanne, PHB Ecublens, Inst Micro & Optoelect, CH-1015 Lausanne, Switzerland. ISI Document Delivery No.: ZP849 Times Cited: 41 Cited Reference Count: 24 Cited References: ANDREANI LC, 1994, PHYS LETT A, V192, P99 BONGIOVANNI G, 1997, PHYS REV B, V55, P7084 CITRIN DS, 1996, PHYS REV LETT, V77, P4596 HARTIG W, 1976, Z PHYS A, V278, P207 HONOLD A, 1989, PHYS REV B, V40, P6442 HOUDRE R, 1994, CONFINED ELECT PHOTO HOUDRE R, 1994, PHYS REV LETT, V73, P2043 HOUDRE R, 1995, PHYS REV B, V52, P7810 JORDA S, 1995, SOLID STATE COMMUN, V93, P45 MADELUNG O, 1987, LANDOLTBORNSTEIN, V2 MEYSTRE P, 1990, ELEMENTS QUANTUM OPT MOLLOW BR, 1969, PHYS REV, V188, P1969 MOLLOW BR, 1972, PHYS REV A, V5, P2217 MYSYROWICZ A, 1986, PHYS REV LETT, V56, P2748 NORRIS TB, 1995, NUOVO CIMENTO D, V17, P1295 SANCHEZMONDRAGO.JJ, 1983, PHYS REV LETT, V51, P550 SAVONA V, 1994, PHYS REV B, V49, P8774 SCHMITTRINK S, 1985, PHYS REV B, V32, P6601 SHAH J, 1996, ULTRAFACT SPECTROSCO THOMPSON RJ, 1992, PHYS REV LETT, V68, P1132 WEISBUCH C, 1992, PHYS REV LETT, V69, P3314 WHITTAKER DM, 1996, PHYS REV LETT, V77, P4792 WU FY, 1975, PHYS REV LETT, V35, P1426 WU FY, 1977, PHYS REV LETT, V38, P107
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
Variations on the Author
Full text link“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
Full text linkWe 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
Vertical-external-cavity semiconductor lasers
No full textSurface-emitting semiconductor lasers can make use of external cavities and optical pumping techniques to achieve a combination of high continuous-wave output power and near-diffraction-limited beam quality that is not matched by any other type of semiconductor source. The ready access to the laser mode that the external cavity provides has been exploited for applications such as intra-cavity frequency doubling and passive mode-locking. The purpose of this Topical Review is to outline the operating principles of these versatile lasers and summarize the capabilities of devices that have been demonstrated so far. Particular attention is paid to the generation of near-transform-limited sub-picosecond pulses in passively mode-locked surface-emitting lasers, which are potentially of interest as compact sources of ultrashort pulses at high average power that can be operated readily at repetition rates of many gigahertz
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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