1,720,963 research outputs found
Magnetic susceptibility study of Ce 3+ in PbCeA (A=Te, Se, S)
No full textThe magnetic susceptibility of Pb 1-xCe xA (A=S, Se and Te) crystals with Ce 3 concentrations 0.006≤x≤0.036 was investigated in the temperature range from 2 K to 300 K. The magnetic susceptibility data was found to be consistent with a 2F 5-2 lowest manifold for Ce 3 ions with a crystal-field splitting Δ=E(Γ 8)-E(Γ 7) of about 340 K, 440 K and 540 K for Pb 1-xCe xTe, Pb 1-xCe xSe, and Pb 1-xCe xS, respectively. For all the three compounds the doublet Γ 7 lies below the Γ 8 quadruplet which confirms the substitution of Pb 2 by Ce 3 ions in the host crystals. The observed values for the crystal-field splitting are in good agreement with the calculated ones based on the point-charge model. Moreover, the effective Landé factors were determined by X-band (∼9.5 GHz), electron paramagnetic measurements (EPR) to be g=1.333, 1.364, and 1.402 for Ce ions in PbA, A = S, Se and Te, respectively. The small difference with the predicted Landé factor g of 10-7 for the Γ 7 (J=5-2) ground state was attributed to crystal-field admixture. © 2012 Elsevier B.V. All rights reserved.Adroja DT, 2005, PHYSICA B, V359, P314, DOI 10.1016-j.physb.2005.01.118; ANDERSON JR, 1990, PHYS REV B, V41, P1014, DOI 10.1103-PhysRevB.41.1014; Banerjee P, 2005, J MATER SCI, V40, P1333, DOI 10.1007-s10853-005-0561-7; Bauer G., 1991, DILUTED MAGNETIC SEM; Bindilatti V, 1998, PHYS REV B, V57, P7854, DOI 10.1103-PhysRevB.57.7854; Dash K, 2012, J MAGN MAGN MATER, V324, P602, DOI 10.1016-j.jmmm.2011.08.051; Fita P, 1999, APPL PHYS A-MATER, V68, P681, DOI 10.1007-s003390050960; FREEMAN AJ, 1962, PHYS REV, V127, P2058, DOI 10.1103-PhysRev.127.2058; GAJ JA, 1979, SOLID STATE COMMUN, V29, P435, DOI 10.1016-0038-1098(79)91211-0; GENNARO AM, 1993, MATER RES SOC SYMP P, V301, P213, DOI 10.1557-PROC-301-213; GORSKA M, 1989, ACTA PHYS POL A, V75, P273; GORSKA M, 1990, SOLID STATE COMMUN, V75, P363, DOI 10.1016-0038-1098(90)90913-V; GORSKA M, 1988, PHYS REV B, V38, P9120, DOI 10.1103-PhysRevB.38.9120; Grabecki G, 2002, PHYSICA E, V13, P649, DOI 10.1016-S1386-9477(02)00210-2; Gratens X, 2003, PHYSICA B, V329, P1245, DOI 10.1016-S0921-4526(02)02207-X; Gratens X, 1997, PHYS REV B, V55, P8075, DOI 10.1103-PhysRevB.55.8075; Gratens X, 2001, J MAGN MAGN MATER, V226, P2036, DOI 10.1016-S0304-8853(00)01079-9; Gratens X, 2009, PHYS REV B, V79, DOI 10.1103-PhysRevB.79.075207; Gratens X, 2000, PHYSICA B, V284, P1519, DOI 10.1016-S0921-4526(99)02726-X; Gratens X, 2000, J PHYS-CONDENS MAT, V12, P3711, DOI 10.1088-0953-8984-12-15-317; Hermann C.F., 1966, J APPL PHYS, V37, P1312; HULLIGER F, 1978, J MAGN MAGN MATER, V8, P87, DOI 10.1016-0304-8853(78)90108-7; Isber S, 1997, J PHYS-CONDENS MAT, V9, P10023, DOI 10.1088-0953-8984-9-45-028; Isber S, 1997, PHYS REV B, V56, P13724, DOI 10.1103-PhysRevB.56.13724; Isber S, 1996, PHYS REV B, V54, P7634, DOI 10.1103-PhysRevB.54.7634; Jwardowski A., 1990, J APPL PHYS, V67, P5108; LEA KR, 1962, J PHYS CHEM SOLIDS, V23, P1381, DOI 10.1016-0022-3697(62)90192-0; LEWICKI A, 1987, J PHYS C SOLID STATE, V20, P2005, DOI 10.1088-0022-3719-20-13-016; OTT HR, 1979, PHYS REV LETT, V42, P1378, DOI 10.1103-PhysRevLett.42.1378; Springholz G, 2002, PHYSICA E, V13, P876, DOI 10.1016-S1386-9477(02)00224-2; Su P, 2011, PHYSICA B, V406, P4429, DOI 10.1016-j.physb.2011.09.001; VISSER R, 1993, J PHYS-CONDENS MAT, V5, P5887, DOI 10.1088-0953-8984-5-32-01711
Superconducting properties of chromium Cr-YBCO grown by pulsed laser deposition
No full textThin superconducting films of type Chromium incorporated YBa 2Cu3CrxO6+δ have been grown by Pulsed Laser Deposition (PLD). The prepared films have been characterized using X-ray powder diffraction (XRD) and Energy Dispersive X-Ray (EDS) analysis. The superconducting transition temperature Tc determined from electrical resistivity measurements was found to slightly increase for low Cr-content (x) and decreases when x andgt; 0.05. Furthermore, the surface morphology of the Cr doped and the pure YBCO films were investigated by Scanning Probe Microscope (SPM). © 2008 IOP Publishing Ltd.Abou-Aly A. I., 2002, INT C RES TRENDS SCI, P91; Guth K, 2001, PHYS REV B, V64, DOI 10.1103-PhysRevB.64.140508; HAMMOND RH, 1996, ADV SUPERCONDUCTIVIT, V8, P1029; Koo JH, 2003, J PHYS-CONDENS MAT, V15, pL729, DOI 10.1088-0953-8984-15-46-L03; LINDEMER TB, 1991, PHYSICA C, V178, P93, DOI 10.1016-0921-4534(91)90163-S; MacManus-Driscoll JL, 1998, ANNU REV MATER SCI, V28, P421, DOI 10.1146-annurev.matsci.28.1.421; Weber A, 2003, APPL PHYS LETT, V82, P772, DOI 10.1063-1.1543640; Yao X, 2002, PHYSICA C, V378, P107, DOI 10.1016-S0921-4534(02)01392-811
One-dimensional coordination polymer [Co(H2O) 4(pyz)](NO3)2 • 2H2O (pyz = pyrazine) with intra- and inter-chain H-bonds: Structure, electronic spectral studies and magnetic properties
No full textThe synthesis, structure and magnetic properties of the cobalt(II) complex (1) [Co(H2O)4(pyz)](NO3)2 • 2H2O is reported. The compound crystallizes in the triclinic system, space group P1̄, with cell constants: a = 7.0328(15) Å, b = 7.1255(16) Å, c = 8.4198(19) Å, α = 107.226(4)°, β = 114.242(4)°, γ = 90.487(4)°, Z = 1 and V = 363.35(14) Å3. The structure of 1 consists of elongated octahedral CoO4N2 chromophores with bridging pyrazine ligands forming a one-dimensional coordination polymer along the crystallographic b-axis. The nitrate ions hydrogen-bond to the water ligands (L) and guest water (G), and form H2O(L)⋯H2O(G)⋯NO3-⋯H2O(G)⋯H2O(L) chains which flank either side of the coordination polymer chains. Hydrogen-bonding is extended to neighboring chains forming a two-dimensional network. The solvent effect on the electronic spectra of pyrazine and pyrazine cobalt complex 1 has been investigated. The magnetic susceptibility of complex 1 versus temperature data showed a strong antiferromagnetic coupling between Co ions. The best fitting parameters were obtained for J1-kB = -26.4 K, J2-kB = -2.2 K and g = 2.3. © 2004 Elsevier Ltd. All rights reserved.Abragham A, 1970, ELECT PARAMAGNETIC R; ABRAHAMS BF, 1994, NATURE, V369, P727, DOI 10.1038-369727a0; Barbour L. J., 2001, J SUPRAMOL CHEM, V1, P189, DOI DOI 10.1016-S1472-7862(02)00030-8; BINDILATTI V, 1994, PHYS REV B, V50, P14464; Braga D, 1998, CHEM REV, V98, P1375, DOI 10.1021-cr960091b; CARLIN RL, 1985, PHYS REV B, V32, P7476, DOI 10.1103-PhysRevB.32.7476; CARLUCCI L, 1995, J AM CHEM SOC, V117, P4562, DOI 10.1021-ja00121a014; CARLUCCI L, 1995, ANGEW CHEM INT EDIT, V34, P1895, DOI 10.1002-anie.199518951; CARLUCCI L, 1994, J CHEM SOC CHEM COMM, P2755, DOI 10.1039-c39940002755; CARLUCCI L, 1995, INORG CHEM, V34, P5698, DOI 10.1021-ic00126a048; CARRECK PW, 1971, J CHEM SOC CHEM COMM, P1634, DOI 10.1039-c29710001634; Christidis T, 2002, J MAGN MAGN MATER, V242, P939, DOI 10.1016-S0304-8853(01)01317-8; Chui SSY, 1999, SCIENCE, V283, P1148, DOI 10.1126-science.283.5405.1148; Emori S., 1976, COORDIN CHEM REV, V21, P1; FETZER T, 1994, Z ANORG ALLG CHEM, V620, P1750, DOI 10.1002-zaac.19946201015; FISHER ME, 1964, AM J PHYS, V32, P343, DOI 10.1119-1.1970340; Halasyamani P, 1996, Z ANORG ALLG CHEM, V622, P479, DOI 10.1002-zaac.19966220316; HANAK M, 1981, MAT SCI, V7, P185; HAYNES JS, 1986, INORG CHEM, V25, P3740, DOI 10.1021-ic00241a006; HAYNES JS, 1988, CAN J CHEM, V66, P2079, DOI 10.1139-v88-333; Isber S, 1997, J PHYS-CONDENS MAT, V9, P10023, DOI 10.1088-0953-8984-9-45-028; ISBER S, 1995, PHYS REV B, V51, P15211, DOI 10.1103-PhysRevB.51.15211; Jones CJ, 1998, CHEM SOC REV, V27, P289; JUNG OS, 1994, J AM CHEM SOC, V116, P2229, DOI 10.1021-ja00084a107; Kahn O., 1996, MAGNETISM SUPRAMOLEC; KITAGAWA S, 1992, INORG CHEM, V1714, P31; KITAGAWA S, 1998, B CHEM SOC JPN, V71, P1; KITAGAWA S, 1993, B CHEM SOC JPN, V66, P3387, DOI 10.1246-bcsj.66.3387; KUBEL F, 1981, Z NATURFORSCH B, V36, P441; Lang A, 1996, ADV MATER, V8, P60; LEHN JM, 1995, SUPRAMOL CHEM, P89; LEWICKI A, 1991, PHYS REV B, V43, P5713, DOI 10.1103-PhysRevB.43.5713; Leznoff DB, 2001, POLYHEDRON, V20, P1247, DOI 10.1016-S0277-5387(01)00601-5; LINDSEY JS, 1991, NEW J CHEM, V15, P153; Lu J, 1997, INORG CHEM, V36, P923, DOI 10.1021-ic961158g; Ma BQ, 2001, POLYHEDRON, V20, P1255, DOI 10.1016-S0277-5387(01)00602-7; MACGILLIVRAY LR, 1994, J CHEM SOC CHEM COMM, P1325, DOI 10.1039-c39940001325; Masoud M.S., 2000, ULTRA SCI PHYSICAL S, V12, P12; Masoud MS, 2001, SPECTROCHIM ACTA A, V57, P977, DOI 10.1016-S1386-1425(00)00416-9; Matsushita MM, 1997, J AM CHEM SOC, V119, P4369, DOI 10.1021-ja964083o; Moulton B, 2001, CRYST ENG, V4, P309, DOI 10.1016-S1463-0184(01)00023-5; OCONNOR CJ, 1981, INORG CHEM, V20, P545, DOI 10.1021-ic50216a046; OTIENO T, 1993, INORG CHEM, V32, P1607, DOI 10.1021-ic00061a015; OTIENO T, 1990, CAN J CHEM, V68, P1901, DOI 10.1139-v90-294; OTIENO T, 1989, CAN J CHEM, V67, P1964, DOI 10.1139-v89-306; OTIENO T, 1993, INORG CHEM, V32, P4384, DOI 10.1021-ic00072a037; REAL JA, 1991, INORG CHEM, V30, P2701, DOI 10.1021-ic00012a026; Sheldrick G. M., 1997, SHELX 97; SPASOJEVIC V, 1991, PHYS STATUS SOLIDI B, V165, P555, DOI 10.1002-pssb.2221650226; STRAHLE J, 1982, MOL CRYST LIQ CRYST, V81, P265, DOI 10.1080-00268948208072573; TURNBULL MM, 1991, POLYHEDRON, V10, P1835, DOI 10.1016-S0277-5387(00)83808-5; Veciana J, 1996, J PHYS I, V6, P1967, DOI 10.1051-jp1:1996199; VILLERET M, 1990, PHYS REV B, V41, P10028, DOI 10.1103-PhysRevB.41.10028; YAGHI OM, 1995, NATURE, V378, P703, DOI 10.1038-378703a0; Yaghi OM, 1996, J AM CHEM SOC, V118, P295, DOI 10.1021-ja953438l; Yanga SY, 2003, ACTA CRYSTALLOGR E, V59, pM961, DOI 10.1107-S1600536803021573; Yoshioka N, 1997, CHEM LETT, P251, DOI 10.1246-cl.1997.251; ZAWOROTKO MJ, 1994, CHEM SOC REV, V23, P283, DOI 10.1039-cs994230028316181
Superconducting properties of zinc substitution in Tl-2223 phase
No full textThe effect of partial replacement of copper by zinc in Tl2Ba2Ca2Cu3O10-δ superconductor phase is studied. Superconducting samples of the nominal composition Tl2Ba2Ca2Cu3-xZnx O10-δ with x ranging from 0 to 0.6 are prepared under normal pressure by a one step of solid-state reaction technique. The samples are characterized by using X-ray powder diffraction, scanning electron microscope (SEM) and EDX. The X-ray data indicate that the partial replacement of Cu2+ions by Zn2+ions does not influence the tetragonal structure of the samples, and the lattice parameters a and c vary according to the difference in the ionic radii of Cu and Zn. The superconducting parameters, such as superconducting transition temperature Tc, critical current density Jc and irreversibility field Bir are calculated from electrical resistivity and AC-magnetic susceptibility measurements. © 2007 Elsevier B.V. All rights reserved.Abou-Aly A.I., 2002, INT C RES TRENDS SCI, V91; ADACHI S, 1990, PHYSICA C, V111, P543; Awad R, 2000, PHYSICA C, V341, P685, DOI 10.1016-S0921-4534(00)00650-X; Awad R, 2007, SUPERCOND SCI TECH, V20, P401, DOI 10.1088-0953-2048-20-4-017; Awad R, 2001, PHYSICA B, V307, P72, DOI 10.1016-S0921-4526(01)00971-1; Batista-Leyva AJ, 2003, SUPERCOND SCI TECH, V16, P857, DOI 10.1088-0953-2048-16-8-305; BEAN CP, 1964, REV MOD PHYS, V36, P31, DOI 10.1103-RevModPhys.36.31; BERKLEY DD, 1993, PHYS REV B, V47, P5524, DOI 10.1103-PhysRevB.47.5524; CHEN DX, 1990, PHYSICA C, V167, P317, DOI 10.1016-0921-4534(90)90349-J; Chu SY, 2000, PHYSICA C, V337, P229, DOI 10.1016-S0921-4534(00)00107-6; Fradina IA, 1999, PHYSICA C, V311, P81, DOI 10.1016-S0921-4534(98)00563-2; Glowacki BA, 1997, CRYOGENICS, V37, P609, DOI 10.1016-S0011-2275(97)00053-2; HAZEN RM, 1988, PHYS REV LETT, V60, P1657, DOI 10.1103-PhysRevLett.60.1657; Isber S, 2005, SUPERCOND SCI TECH, V18, P311, DOI 10.1088-0953-2048-18-3-018; Isber S, 2006, J PHYS CONF SER, V43, P450, DOI 10.1088-1742-6596-43-1-112; Kayed TS, 2003, CRYST RES TECHNOL, V38, P946, DOI 10.1002-crat.200310118; Kuhberger M, 2003, PHYSICA C, V390, P263, DOI 10.1016-S0921-4534(03)00706-8; LEE MW, 1995, PHYSICA C, V245, P6, DOI 10.1016-0921-4534(95)00100-X; Mezzetti E, 2000, PHYSICA C, V332, P115, DOI 10.1016-S0921-4534(00)00008-3; MOHAMMED NH, 2005, ARAB INT C REC ADV P, P9; Nishida A, 2003, PHYSICA C, V392, P349, DOI 10.1016-S0921-4534(03)00848-7; Pavard S, 1999, PHYSICA C, V316, P198, DOI 10.1016-S0921-4534(99)00259-2; Ravi S, 2000, PHYSICA C, V330, P58, DOI 10.1016-S0921-4534(99)00611-5; REN ZF, 1991, PHYSICA C, V184, P24, DOI 10.1016-0921-4534(91)91496-Q; RUCKENSTEIN E, 1989, MATER LETT, V8, P421, DOI 10.1016-0167-577X(89)90065-7; Tang H, 1997, PHYSICA C, V282, P2111, DOI 10.1016-S0921-4534(97)01171-4; Triscone G, 1996, PHYSICA C, V264, P233, DOI 10.1016-0921-4534(96)00262-6; VANDERAH TA, 1992, CHEM SUPERCONDUCTOR, P90; WANG YB, 1993, J LOW TEMP PHYS, V15, P169; WESTERHOLT K, 1989, PHYS REV B, V39, P11680, DOI 10.1103-PhysRevB.39.11680; Wisniewski A, 2000, PHYS REV B, V61, P791, DOI 10.1103-PhysRevB.61.791; XU YW, 1990, PHYSICA C, V169, P205, DOI 10.1016-0921-4534(90)90177-G; Yamauchi H, 1998, SUPERCOND SCI TECH, V11, P1006, DOI 10.1088-0953-2048-11-10-022; Yang Li, 1994, Physics Letters A, V18543
Superconducting properties of Tl-2223 phase substituted by iron
No full textBulk superconducting samples of type Tl2Ba2Ca 2Cu3-xFexO10-δ; with 0 x 0.4, have been prepared using a single step of solid-state reaction. The prepared samples have been characterized using X-ray powder diffraction (XRD), scanning electron microscope (SEM) and microprobe analysis (MPA). The tetragonal structure of Tl-2223 did not change with the partial replacement of Cu 2+ by Fe3+ ions, whereas the lattice parameters were found to vary as function of Fe-content. The superconducting transition temperature Tc determined from electrical resistivity and ac magnetic susceptibility measurements shows suppression in its value as Fecontent increases. The suppression in Tc was attributed to the magnetic disorder and Cooperpairs breaking. The critical current density Jc and field irreversibility Bir were calculated as function of Fe-content. © 2006 IOP Publishing Ltd.Abou-Aly A. I., 2002, INT C RES TRENDS SCI, P91; Awad R, 2000, PHYSICA C, V341, P685, DOI 10.1016-S0921-4534(00)00650-X; Awad R, 2001, PHYSICA B, V307, P72, DOI 10.1016-S0921-4526(01)00971-1; BEAN CP, 1964, REV MOD PHYS, V36, P31, DOI 10.1103-RevModPhys.36.31; ESKES H, 1988, PHYS REV LETT, V61, P1415, DOI 10.1103-PhysRevLett.61.1415; GOTO T, 1997, PHYSICA C, V263, P8750; Isber S, 2005, SUPERCOND SCI TECH, V18, P311, DOI 10.1088-0953-2048-18-3-018; Koo JH, 2003, J PHYS-CONDENS MAT, V15, pL729, DOI 10.1088-0953-8984-15-46-L03; Li Y, 1999, PHYSICA C, V315, P129, DOI 10.1016-S0921-4534(99)00209-9; SIEGAD MP, 1997, J MATER RES, V12, P1421; WESTERHOLT K, 1989, PHYS REV B, V39, P11680, DOI 10.1103-PhysRevB.39.1168022
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
Structure, thermal analysis and magnetism of the doubly bridged linear polymer [Ni(4-NH2-C6H4CO2)2(CH3OH)2] · CH3OH
No full textThe title compound [Ni(4-NH2-C6H4CO2)2(CH3OH)2] · CH3OH (1) consists of Ni(II) atoms doubly bridged by p-aminobenzoate ligands (PAB) into 1D chains which are further connected into a 3D framework by methanol molecules through hydrogen bonding. Compound 1 is monoclinic P2(1)-n, a = 9.0903(5) Å, b = 10.9059(5) Å, c = 9.9994(5) Å, β = 106.6880(10)°, Z = 4. Intrachain π-π interactions are observed between the aromatic rings of doubly bridging PAB ligands. The aromatic rings are in an offset arrangement with 3.607 Å interplanar spacing. The magnetic data of compound 1 for the temperature range 300-3 K is indicative of ferromagnetically coupled nickel species. The best fitting parameters were obtained for J = 0.74 cm-1, D = -2.48 cm-1 and g = 2.35. Thermogravimetric analysis of 1 indicates a sharp weight loss of one PAB ligand centered at 387.42 °C (ΔH = 94.86 kJ-mol) and a loss of two coordinated methanol molecules at 489.20 °C with ΔH = 29.78 kJ-mol. The formation constant of Ni(II) with p-aminobenzoic acid has been evaluated at different temperatures using pH titration techniques in 50percent ethanol. The obtained values at 25 °C are log Kf1 = 3.24 and log Kf2 = 1.21. The thermodynamic parameters of complexation were also calculated and discussed. © 2006 Elsevier Ltd. All rights reserved.ABRAHAMS BF, 1994, NATURE, V369, P727, DOI 10.1038-369727a0; AMIRASLANOV IR, 1978, ZH STRUKT KHIM, V19, P1120; AMIRASLANOV IR, 1980, J STRUCT CHEM+, V21, P104, DOI 10.1007-BF00754176; AMIRASLANOV IR, 1978, ZH STRUKT KHIM, V19, P1129; AMIRASLANOV IR, 1980, ZH STRUKT KHIM, V21, P112; AMIRASLANOV IR, 1980, J STRUCT CHEM+, V21, P109, DOI 10.1007-BF00754177; AMIRASLANOV IR, 1979, ZH STRUKT KHIM, V20, P1075; AMIRASLANOV IR, 1980, J STRUCT CHEM+, V21, P363, DOI 10.1007-BF00746861; BATTAGLIA LP, 1991, J CHEM SOC FARADAY T, V87, P3863, DOI 10.1039-ft9918703863; Batten SR, 1999, J CHEM SOC DALTON, P2987, DOI 10.1039-a903487k; CARLUCCI L, 1995, J AM CHEM SOC, V117, P4562, DOI 10.1021-ja00121a014; CARLUCCI L, 1995, ANGEW CHEM INT EDIT, V34, P1895, DOI 10.1002-anie.199518951; CARLUCCI L, 1995, INORG CHEM, V34, P5698, DOI 10.1021-ic00126a048; Chui SSY, 1999, SCIENCE, V283, P1148, DOI 10.1126-science.283.5405.1148; Claessens CG, 1997, J PHYS ORG CHEM, V10, P254, DOI 10.1002-(SICI)1099-1395(199705)10:5254::AID-POC8753.0.CO;2-3; DANIEL EA, 1978, AUST J CHEM, V31, P723; DEACON GB, 1980, COORDIN CHEM REV, V33, P227, DOI 10.1016-S0010-8545(00)80455-5; DENEEF T, 1976, PHYS REV B, V13, P4141, DOI 10.1103-PhysRevB.13.4141; DENEEF T, 1975, THESIS EINDHOVEN NET; EDWARDS DA, 1968, CAN J CHEMISTRY, V46, P3443; El-Dessouky M.A., 1988, AFINIDAD, V416, P321; Escuer A, 1998, INORG CHIM ACTA, V269, P313, DOI 10.1016-S0020-1693(97)05801-5; Fan J, 2001, INORG CHEM COMMUN, V4, P501, DOI 10.1016-S1387-7003(01)00259-3; FUJITA M, 1994, J AM CHEM SOC, V116, P1151, DOI 10.1021-ja00082a055; GABLE RW, 1990, J CHEM SOC CHEM COMM, P1677, DOI 10.1039-c39900001677; Garden SJ, 2002, ACTA CRYSTALLOGR B, V58, P701, DOI 10.1107-S0108768102007978; Glidewell C, 2002, ACTA CRYSTALLOGR B, V58, P864, DOI 10.1107-S0108768102009941; Goher MAS, 2002, POLYHEDRON, V21, P1871, DOI 10.1016-S0277-5387(02)01061-6; Holman KT, 2005, POLYHEDRON, V24, P221, DOI 10.1016-j.poly.2004.11.017; Jager L, 2001, J MOL STRUCT, V570, P159, DOI 10.1016-S0022-2860(01)00491-4; Janiak C, 2000, J CHEM SOC DALTON, P3885, DOI 10.1039-b003010o; Jensen P, 1999, CHEM COMMUN, P177, DOI 10.1039-a808777f; Kabbani AT, 2004, J CHEM CRYSTALLOGR, V34, P749, DOI 10.1007-s10870-004-7650-3; KABBANI AT, 1981, J MAGN RESON, V43, P90, DOI 10.1016-0022-2364(81)90084-6; Karanovic L, 2002, ACTA CRYSTALLOGR C, V58, pm275, DOI 10.1107-S0108270102004341; KITAGAWA S, 1998, B CHEM SOC JPN, V71, P1; Kondo M, 1997, ANGEW CHEM INT EDIT, V36, P1725, DOI 10.1002-anie.199717251; Kutasi AM, 2002, AUST J CHEM, V55, P311, DOI 10.1074-CH02065; Maji TK, 2001, POLYHEDRON, V20, P651, DOI 10.1016-S0277-5387(01)00729-X; Manson JL, 1999, J MATER CHEM, V9, P979, DOI 10.1039-a808089e; Manson JL, 2001, J AM CHEM SOC, V123, P162, DOI 10.1021-ja0024791; Martell A.E., 1992, DETERMINATION USE ST; Masoud MS, 2002, THERMOCHIM ACTA, V381, P119, DOI 10.1016-S0040-6031(01)00691-8; Meyer F, 2001, INORG CHEM COMMUN, V4, P305, DOI 10.1016-S1387-7003(01)00188-5; Pan L, 2001, CHEM COMMUN, P105, DOI 10.1039-b007344j; PARVEEN S, 1981, P NATL ACAD SCI IN A, V51, P337; Riggio I, 2001, INORG CHIM ACTA, V313, P120, DOI 10.1016-S0020-1693(00)00374-1; Robson R., 1992, ACS SYM SER; SUBRAMANIAN S, 1995, ANGEW CHEM INT EDIT, V34, P2127, DOI 10.1002-anie.199521271; Sundholm D, 1998, J PHYS CHEM A, V102, P7137, DOI 10.1021-jp9813589; Tong ML, 2002, ACTA CRYSTALLOGR C, V58, pM232, DOI 10.1107-S0108270102002962; YAGHI OM, 1995, NATURE, V378, P703, DOI 10.1038-378703a0; Yan B, 1998, MATER RES BULL, V33, P1517, DOI 10.1016-S0025-5408(98)00133-0; ZAWOROTKO MJ, 1994, CHEM SOC REV, V23, P283, DOI 10.1039-cs9942300283; ZAWOROTOTKO MJ, 2006, J COORD CHEM, P6599
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
- …
