1,720,980 research outputs found
Supersymmetric domain walls and strings in D=5 gauged supergravity coupled to vector multiplets
Full text linkWe present new supersymmetric domain wall and string solutions of five-dimensional N = 2 gauged supergravity coupled to an arbitrary number of vector multiplets. Using the techniques of very special geometry allows to obtain the most general domain wall preserving half of the supersymmetries. This solution, which describes a renormalization group flow in the dual field theory, is given in terms of Weierstrass elliptic functions. The magnetically charged, one quarter supersymmetric string solutions are shown to be closely related to Liouville theory. We furthermore investigate general product space compactifications, and show that topological transitions from AdS3 × S2 to AdS3 × H2 can occur when one moves in moduli space
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
General supersymmetric solutions of five-dimensional supergravity
No full textThe classification of 1-4-supersymmetric solutions of five dimensional gauged supergravity coupled to arbitrary many abelian vector multiplets, which was initiated in [15], is completed. The structure of all solutions for which the Killing vector constructed from the Killing spinor is null is investigated in both the gauged and the ungauged theories and some new solutions are constructed. © SISSA 2005.Aharony O, 2000, PHYS REP, V323, P183, DOI 10.1016-S0370-1573(99)00083-6; Behrndt K, 1998, PHYS LETT B, V442, P97, DOI 10.1016-S0370-2693(98)01208-8; BENA I, HEPTH0408106; Cacciatori SL, 2003, J HIGH ENERGY PHYS; Cacciatori SL, 2004, J HIGH ENERGY PHYS; Chamseddine AH, 2000, PHYS LETT B, V477, P329, DOI 10.1016-S0370-2693(00)00178-7; Chamseddine AH, 1999, PHYS LETT B, V460, P63, DOI 10.1016-S0370-2693(99)00761-3; CHONG ZW, HEPTH0505112, P9; CHONG ZW, HEPTH0506029; de Boer J, 2000, J HIGH ENERGY PHYS; Elvang H, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.024033; Elvang H, 2004, PHYS REV LETT, V93, DOI 10.1103-PhysRevLett.93.211302; Gauntlett JP, 2003, CLASSICAL QUANT GRAV, V20, P4587, DOI 10.1088-0264-9381-20-21-005; Gauntlett JP, 2003, PHYS REV D, V68, DOI 10.1103-PhysRevD.68.105009; Gauntlett JP, 2003, J HIGH ENERGY PHYS; Gauntlett JP, 2004, COMMUN MATH PHYS, V247, P421, DOI 10.1007-s00220-004-1066-y; Gauntlett JP, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.025013; Gauntlett JP, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.045002; Gauntlett JP, 2003, J HIGH ENERGY PHYS; Gillard J, 2005, CLASSICAL QUANT GRAV, V22, P1033, DOI 10.1088-0264-9381-22-6-009; Gran U, 2005, CLASSICAL QUANT GRAV, V22, P2701, DOI 10.1088-0264-9381-22-13-013; GUNAYDIN M, 1985, NUCL PHYS B, V253, P573, DOI 10.1016-0550-3213(85)90547-4; Gutowski JB, 2004, J HIGH ENERGY PHYS; Gutowski JB, 2004, J HIGH ENERGY PHYS; HAWKING SW, 1983, COMMUN MATH PHYS, V87, P577, DOI 10.1007-BF01208266; Klemm D, 2000, PHYS REV D, V62, DOI 10.1103-PhysRevD.62.024003; Klemm D, 2001, J HIGH ENERGY PHYS; MACCONAMHNA OAP, HEPTH0505230; Mac Conamhna OAP, 2004, PHYS REV D, V70, DOI 10.1103-PhysRevD.70.105024; Maldacena J M, 1998, ADV THEOR MATH PHYS, V2, P231, DOI DOI 10.1023-A:1026654312961; POPE CN, 1982, J PHYS A-MATH GEN, V15, P2455, DOI 10.1088-0305-4470-15-8-025; Reall HS, 2003, PHYS REV D, V68, DOI 10.1103-PhysRevD.68.024024; TOD KP, 1983, PHYS LETT B, V121, P241, DOI 10.1016-0370-2693(83)90797-9; Witten E., 1998, ADV THEOR MATH PHYS, V2, P253, DOI DOI 10.1016-S0370-1573(99)00083-6; Witten E., 1998, ADV THEORY MATH PHYS, V2, P50528343
Half-supersymmetric solutions in five-dimensional supergravity
No full textWe present a systematic classification of half-supersymmetric solutions of gauged N = 2, D = 5 supergravity coupled to an arbitrary number of abelian vector multiplets for which at least one of the Killing spinors generate a time-like Killing vector. © SISSA 2007.Aharony O, 2000, PHYS REP, V323, P183, DOI 10.1016-S0370-1573(99)00083-6; Awad AM, 2001, PHYS REV D, V63; Awad AM, 2000, PHYS REV D, V61, DOI 10.1103-PhysRevD.61.084025; Awad AM, 2000, PHYS REV D, V62, DOI 10.1103-PhysRevD.62.125010; Behrndt K, 1998, PHYS LETT B, V442, P97, DOI 10.1016-S0370-2693(98)01208-8; Berman DS, 1999, PHYS LETT B, V463, P168, DOI 10.1016-S0370-2693(99)00974-0; Cacciatori SL, 2007, J HIGH ENERGY PHYS; Cacciatori SL, 2003, J HIGH ENERGY PHYS; Caldarelli MM, 1999, NUCL PHYS B, V555, P157, DOI 10.1016-S0550-3213(99)00342-9; Caldarelli MM, 2000, CLASSICAL QUANT GRAV, V17, P399, DOI 10.1088-0264-9381-17-2-310; Chamblin A, 1999, PHYS REV D, V60, DOI 10.1103-PhysRevD.60.064018; Chamblin A, 1999, PHYS REV D, V60, DOI 10.1103-PhysRevD.60.104026; Chamseddine AH, 2000, PHYS LETT B, V477, P329, DOI 10.1016-S0370-2693(00)00178-7; Cvetic M, 1999, J HIGH ENERGY PHYS, DOI 10.1088-1126-6708-1999-04-024; Cvetic M, 1999, J HIGH ENERGY PHYS; Elvang H, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.024033; Elvang H, 2004, PHYS REV LETT, V93, DOI 10.1103-PhysRevLett.93.211302; Emparan R, 1999, J HIGH ENERGY PHYS; Figueroa-O'Farrill J, 2007, J HIGH ENERGY PHYS; Figueroa-O'Farrill J, 2007, CLASSICAL QUANT GRAV, V24, P4429, DOI 10.1088-0264-9381-24-17-010; Gauntlett JP, 2003, CLASSICAL QUANT GRAV, V20, P4587, DOI 10.1088-0264-9381-20-21-005; Gauntlett JP, 2003, PHYS REV D, V68, DOI 10.1103-PhysRevD.68.105009; Gauntlett JP, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.025013; Gauntlett JP, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.045002; GIBBONS GW, 1982, PHYS LETT B, V109, P190, DOI 10.1016-0370-2693(82)90751-1; Gillard J, 2005, CLASSICAL QUANT GRAV, V22, P1033, DOI 10.1088-0264-9381-22-6-009; Gran U, 2007, J HIGH ENERGY PHYS; Gran U, 2005, CLASSICAL QUANT GRAV, V22, P2453, DOI 10.1088-0264-9381-22-12-010; Gran U, 2007, J HIGH ENERGY PHYS; Gran U, 2006, NUCL PHYS B, V753, P118, DOI 10.1016-j.nuclphysb.2006.07.007; Grover J, 2007, CLASSICAL QUANT GRAV, V24, P417, DOI 10.1088-0264-9381-24-2-009; Gubser S.S., HEPTH0009126; Gubser SS, 1998, PHYS LETT B, V428, P105, DOI 10.1016-S0370-2693(98)00377-3; GUNAYDIN M, 1985, NUCL PHYS B, V253, P573, DOI 10.1016-0550-3213(85)90547-4; Gutowski JB, 2004, J HIGH ENERGY PHYS; Gutowski JB, 2004, J HIGH ENERGY PHYS; Gutowski JB, 2005, J HIGH ENERGY PHYS; Gutowski JB, 2004, J HIGH ENERGY PHYS; Harvey F., 1990, SPINORS CALIBRATIONS; HAWKING SW, 1983, COMMUN MATH PHYS, V87, P577, DOI 10.1007-BF01208266; Hawking SW, 1999, PHYS REV D, V59, DOI 10.1103-PhysRevD.59.064005; Hawking SW, 2000, PHYS REV D, V61; Horowitz GT, 1996, PHYS LETT B, V383, P151, DOI 10.1016-0370-2693(96)00738-1; Klemm D, 2000, PHYS REV D, V62, DOI 10.1103-PhysRevD.62.024003; Klemm D, 2001, J HIGH ENERGY PHYS; Klemm D, 2001, PHYS LETT B, V503, P147, DOI 10.1016-S0370-2693(01)00181-2; Kunduri HK, 2007, J HIGH ENERGY PHYS; Landsteiner K, 1999, J HIGH ENERGY PHYS; Lawson H. B., 1989, SPIN GEOMETRY; Maldacena J, 1999, INT J THEOR PHYS, V38, P1113, DOI 10.1023-A:1026654312961; Maldacena J, 2001, INT J MOD PHYS A, V16, P822, DOI 10.1142-S0217751X01003937; Maldacena J M, 1998, ADV THEOR MATH PHYS, V2, P231, DOI DOI 10.1023-A:1026654312961; TOD KP, 1995, CLASSICAL QUANT GRAV, V12, P1801, DOI 10.1088-0264-9381-12-7-020; TOD KP, 1983, PHYS LETT B, V121, P241, DOI 10.1016-0370-2693(83)90797-9; Wang M.-Y., 1989, ANN GLOB ANAL GEOM, V7, P59, DOI 10.1007-BF00137402; Witten E., 1998, ADV THEOR MATH PHYS, V2, P253, DOI DOI 10.1016-S0370-1573(99)00083-6; Witten E., 1998, ADV THEORY MATH PHYS, V2, P5059131
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
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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