1,720,985 research outputs found
Assignment And Frequency Measurement Of Rotational Transitions Of 13cd3oh By Intracavity Laser Stark Spectroscopy
No full textWe present the results of an intracavity Stark spectroscopy experiment on the fundamental state of 13CD3OH. We use an optically pumped hybrid waveguide FIR laser, CH2F2 as active molecule, and 13CD3OH as absorbent molecule. No Brewster window is needed to separate the lasing gas from the absorbing deuterated methanol. An absorption line is assigned as E1 symmetry (n, K, J): (1,4,18) → (1,5,18) and its frequency is measured as 63.08631 cm-1 with a precision of a few parts in 107; two more absorptions are reported and a tentative assignment is given for one of them.374547551Moruzzi, G., Moraes, J.C.S., Strumia, F., (1992) Int. J. Infrared Millim. Waves, 13, pp. 1269-1312Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. Infrared Millim. Waves, 15, pp. 1-44Carli, B., Carlotti, M., Mencaraglia, F., Rossi, E., (1987) Appl. Opt., 26, pp. 3818-3822Inguscio, M., Ioli, N., Moretti, A., Strumia, F., D'Amato, F., (1984) Int. J. Infrared Millim. Waves, 5, pp. 1695-11639Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1992) Int. J. Infrared Millim. Waves, 13, pp. 1801-1823Inguscio, M., Moretti, A., Moruzzi, G., Strumia, F., (1981) Int. J. Infrared Millim. Waves, 2, pp. 943-986Inguscio, M., Moruzzi, G., Evenson, K.M., Jennings, D.A., (1986) J. Appl. Phys., 60, pp. R161-R192Xu, L.H., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., Moruzzi, G., (1993) J. Mol. Spectrosc., 157, pp. 447-466Moraes, J.C.S., Scalabrin, A., Pereira, D., Di Lonardo, G., Fusina, L., (1991) Infrared Phys., 31, pp. 365-372Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1991) Int. J. Infrared Millim. Waves, 12, pp. 1475-1486Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Massa, C.A., Moretti, A., Strumia, F., (1994) XIX Int. Conf. IRMMW (Sendai, Japan), pp. 524-525. , K. Sakai and T. Yoneyama edsInguscio, M., Minguzzi, P., Moretti, A., Strumia, F., Tonelli, M., (1979) Appl. Phys., 18, pp. 261-270Redon, M., Gastaud, C., Fourrier, M., (1979) IEEE J. Quantum Electron., QE-15, pp. 412-414Ioli, N., Moretti, A., Roselli, P., Strumia, F., (1986) J. Opt. Soc. Am. B, 3, pp. 867-869Inguscio, M., Ioli, N., Moretti, A., Strumia, F., D'Amato, F., (1986) Appl. Phys. B, 40, pp. 165-169Xu, L.H., (1992), PhD Thesis, University of New Brunswick, CAXu, L.H., private communicatio
Ch3oh Optically Pumped By A 13co2 Laser: New Laser Lines And Assignments
No full textWe report 12 new THz (far-infrared) laser lines from methanol (CH 3OH), ranging from 58.1 μm (5.2 THz) to 624.6 μm (0.5 THz). A 13CO2 laser of wide tunability (110 MHz) has been used for optical pumping, allowing access to previously unexplored spectral regions. Optoacoustic absorption spectra were used as a guide to search for new THz laser lines, which have been characterized in wavelength, polarization, offset, relative intensity, and optimum operation pressure. For 20 laser lines previously observed, we have measured the absorption offset with respect to the 13CO2 laser line center. © Springer-Verlag 2007.864703706Gregory, I.S., Baker, C., Tribe, W.R., Bradley, I.V., Evans, M.J., Linfield, E.H., Davies, A.G., Missous, M., (2005) IEEE J. Quantum Electron, QE-41, p. 717Ostmann, T.K., Knobloch, P., Koch, M., Hoffmann, S., Breede, M., Hofmann, M., Hein, G., Donhuijsen, K., (2001) Electron. Lett, 37, p. 1461Walther, M., Plochocka, P., Fischer, B., Helm, H., Jepsen, P.U., (2002) Biopolymers, 67, p. 310Yuan, T., Xu, J.Z., Zhang, X.C., (2004) Infrared Phys, 45, p. 417Button, K.J., Inguscio, M., Strumia, F., (1984) Optically Pumped Far-Infrared Lasers, pp. 105-192. , Plenum Press, New YorkD. Pereira, J.C.S. Moraes, E.M. Telles, A. Scalabrin, F. Strumia, A. Moretti, G. Carelli, C.A. Massa, Int. J. Infrared Milli. 15, 1 (1994)S.C. Zerbetto, E.C.C. Vasconcellos, Int. J. Infrared Milli. 15, 889 (1994)Tang, F., Henningsen, J.O., (1986) IEEE J. Quantum Electron, QE-22, p. 2084E.M. Telles, L.R. Zink, K.M. Evenson, Int. J. Infrared Milli. 20, 741 (1999)Petersen, J.C., Duxbury, G., (1982) Appl. Phys. B, 27, p. 19Petersen, J.C., Duxbury, G., (1984) Appl. Phys. B, 34, p. 17D. Pereira, A. Scalabrin, G.P. Galvo, K.M. Evenson, Int. J. Infrared Milli. 13, 497 (1992)Moruzzi, G., Winnewisser, B.P., Winnewisser, M., Mukhopadhyay, I., Strumia, F., (1995) Microwave, Infrared and Laser Transitions of Methanol, pp. 7-52. , CRC Press, Boca RatonCosta, L.F.L., Cruz, F.C., Moraes, J.C.S., Pereira, D., (2004) IEEE J. Quantum Electron, QE-40, p. 946Viscovini, R.C., Cruz, F.C., Pereira, D., (2005) IEEE J. Quantum Electron, QE-41, p. 694R.C. Viscovini, A. Scalabrin, D. Pereira, Int. J. Infrared Milli. 17, 1821 (1996)Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1987) Appl. Phys. B, 44, p. 111Inguscio, M., Moretti, A., Strumia, F., (1979) Opt. Commun, 30, p. 355Moruzzi, G., Strumia, F., Carnesecchi, P., Carli, B., Carlotti, M., (1989) Infrared Phys, 29, p. 47Moruzzi, G., Riminucci, P., Strumia, F., Carli, B., Carlotti, M., Lees, R.M., Mukhopadhyay, I., Winnewisser, M., (1990) J. Mol. Spectrosc, 144, p. 139Moruzzi, G., Strumia, F., Carnesecchi, P., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., (1989) Infrared Phys, 29, p. 583Moruzzi, G., Strumia, F., Moraes, J.C.S., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., Winnewisser, B.P., Winnewisser, M., (1992) J. Mol. Spectrosc, 153, p. 511Ioli, N., Moruzzi, G., Riminucci, P., Strumia, F., Moraes, J.C.S., Winnewisser, B.P., Winnewisser, M., (1995) J. Mol. Spectrosc, 171, p. 130Moraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewisser, M., Gupta, P.K., (1995) J. Mol. Spectrosc, 174, p. 177Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., (1985) Opt. Commun, 55, p. 127Mukhopadyay, I., Lees, R.M., Johns, J.W.C., (1987) IEEE J. Quantum Electron, QE-23, p. 137
Infrared And Far-infrared Spectroscopy Of 13ch3oh: Terahertz Laser Lines And Assignments
No full textWe use a 13CO2 laser as optical pumping source to search for new THz laser lines generated from 13CH3OH. Nineteen new THz laser lines (also identified as far-infrared, FIR) ranging from 42.3 μm (7.1 THz) to 717.7 μm (0.42 THz) are reported. They are characterized in wavelength, offset, relative polarization, relative intensity, and optimum working pressure. We have assigned eight laser lines to specific rotational energy levels in the excited state associated with the C-O stretching mode. © 2006 Elsevier Inc. All rights reserved.2412151154Chang, T.Y., Bridges, T.J., Burkhardt, E.G., (1970) Appl. Phys. Lett., 17, pp. 249-251Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. Infrared Millim. Waves, 15, pp. 1-44Zerbetto, S.C., Vasconcellos, E.C.C., (1994) Int. J. Infrared Millim. Waves, 15, pp. 889-899Costa, L.F.L., Cruz, F.C., Moraes, J.C.S., Pereira, D., (2004) IEEE J. Quantum Eletron., 40, pp. 946-948Viscovini, R.C., Cruz, F.C., Pereira, D., (2005) IEEE J. Quantum Electron., 41, pp. 694-696Ioli, N., Moruzzi, G., Strumia, F., (1980) Lett. Nuovo Cimento, 28, p. 257Strumia, F., Ioli, N., Moretti, A., (1985) NATO ASI Series, 132. , Abraham N.B., Arecchi F.T., Mooradian A., and Sona A. (Eds), Plenum Press, New YorkCarelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1991) Int. J. Infrared Millim. Waves, 12, pp. 557-571Michele, A., Carelli, G., Moretti, A., Strumia, F., Pereira, D., (2004) J. Phys. B: At. Mol. Opt., 37, pp. 1979-1984Petersen, J.C., Duxbury, G., (1982) Appl. Phys. B, 27, pp. 19-25Petersen, J.C., Duxbury, G., (1984) Appl. Phys., B34, pp. 17-21Pereira, D., Scalabrin, A., Galvão, G.P., Evenson, K.M., (1992) Int. J. Infrared and Millim. Waves, 13, pp. 497-506Arnone, D.D., Ciesla, C.M., Pepper, M., (2000) Phys. World, 13, p. 35Walther, M., Fischer, B., Schall, M., Helm, H., Jepsen, P.U., (2000) Chem. Phys. Lett., 332, pp. 389-395Moruzzi, G., Winnewisser, B.P., Winnewisser, M., Mukhopadhyay, I., Strumia, F., (1995) Microwave, Infrared and Laser Transitions of Methanol, , CRC Press, New YorkInguscio, M., Moretti, A., Strumia, F., (1979) Opt. Commun., 30, pp. 355-360Henningsen, J.O., Molecular spectroscopy by far infrared laser emission (1982) Infrared and Millimeter Waves, 5, pp. 29-128. , Button K.J. (Ed), Academic Press, New YorkMoruzzi, G., Xu, L.H., Lees, R.M., Winnewisser, B.P., Winnewisser, M., (1994) J. Mol. Spectrosc., 167, pp. 156-175Moraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewisser, M., Gupta, P.K., (1995) J. Mol. Spectrosc., 174, pp. 177-195Moraes, J.C.S., Moruzzi, G., Strumia, F., Winnewisser, B.P., (2005) J. Mol. Spectrosc., 234, pp. 25-33Michele, A., Carelli, G., Moretti, A., Moruzzi, G., (2006) Appl. Phys. B, 83, pp. 495-497Xu, L.H., Moruzzi, G., (2000) J. Mol. Spectrosc., 204, pp. 48-54Moraes, J.C.S., Carelli, G., Moretti, A., Moruzzi, G., Strumia, F., (1996) J. Mol. Spectrosc., 177, pp. 302-30
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
Infrared Optoacoustic Spectroscopy Of 13cd3od Around 9p Co2 Laser Lines
No full textIn this work we present the results of an investigation about Doppler limited infrared absorbing transitions of the in-plane methyl-rocking and the asymmetric methyl deformation modes of 13CD3OD by means of optoacoustic detection. This is an alternative and attractive technique to be applied to this methanol isotopromer, in comparison to Fourier transform spectroscopy. In fact the contamination problem associated with the fast exchange of OD by OH in the molecule limits the use of the Fourier transform technique. Using a waveguide CO2 laser of 290 MHz tunability on each line we were able to observe 20 IR absorptions, most of them of large offset. The data will be useful in theoretical analysis of this molecule, as well as in the generation of FIR laser radiation in optically pumped molecular laser.214621632Borden, A., Baker, F.E., (1939) J.Chem Phys., 6, p. 553Koehler, J.S., Dennison, D.M., (1940) Phys. Rev., 57, p. 1006Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. of Infrared and Millimeter Waves, 15 (1), p. 1Moruzzi, G., Moraes, J.C.S., Strumia, F., (1992) Int. J. of Infrared and Millimeter Waves, 13 (9), p. 1269Henkel, C., Jacq, T., Nuersberger, R., Menten, K.M., Steppe, H., (1987) Astron. Astrophys., 188 (1), pp. L1Sutton, E.C., Herbst, E., (1988) Astrophys. J., 333 (1), p. 359Moruzzi, G., Strumia, F., Carnesecchi, P., Mukhopadyay, I., Lees, R.M., Johns, J.W.C., (1989) Infrared Phys., 29 (2), p. 583Moruzzi, G., Riminucchi, P., Strumia, F., Carli, B., Carlotti, M., Lees, R.M., Mukhopadyay, I., Winnewisser, M., (1990) J.Mol. Spectrosc., 144 (1), p. 139Moraes, J.C.S., Scalabrin, A., Pereira, D., Dilonardo, G., Fusina, L., (1991) Infrared Phys., 31 (4), p. 365Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, Strumia, F., (1992) Appl. Phys. B, 54 (1), p. 24Mukhopadyay, I., Lees, R.M., Llewis-Bevan, W., Johns, J.W., (1995) J. Chem. Phys., 102 (16), p. 6444Moraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewisser, M., Gupta, P.K., (1995) J. Mol. Spectrosc., 174 (1), p. 177Moraes, J.C.S., Carelli, G., Moretti, A., Moruzzi, G., Strumia, F., (1996) J.Mol. Spectrosc. J. Mol. Spectrosc., 177 (2), p. 302Carelli, G., Ioli, N., Moretti, A., Moruzzi, G., Strumia, F., Zhao, S., Lees, R.M., Goulding, R.R., (1995) Infrared Phys.Tech., 35 (6), p. 743Carelli, G., Moretti, A., Strumia, F., Zhao, S., Lees, R.M., (1996) J. Mol. Spectrosc., 177 (1), p. 79Cruz, F.C., Scalabrin, A., Pereira, D., Vazquez, P.A.M., Hase, Y., Strumia, F., (1992) J. Mol. Spectrosc., 156 (1), p. 22Viscovini, R.C., Scalabrin, A., Pereira, D., (1996) Int. J. of Infrared and Millimeter Waves, 17 (11), p. 1821Carelli, G., Ioli, N., Messina, A., Moretti, A., Strumia, F., Telles, E.M., Moraes, J.C.S., Pereira, D., (1991) Infrared Phys., 31 (4), p. 323Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, A., Strumia, F., (1994) IEEE J. Quantum Electron, QE30 (12), p. 2946Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1992) Int. J. Infrared and Millimeter Waves, 13 (11), p. 1801Viscovini, R.C., Scalabrin, A., Pereira, D., (1997) IEEE J. Quantum Electron, QE33 (6), p. 916Viscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., (1997) Appl. Phys. B, 65 (1), p. 33Viscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., (1999) IEEE J. Quantum Electron, QE35 (11), p. 1613Viscovini, R.C., Cruz, F.C., Moraes, J.C.S., Scalabrin, A., Pereira, D., (1999) Int. J. Infrared and Millimeter Waves, 20 (2), p. 193Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., (1991) Appl. Phys. B, 52 (1), p. 36Pereira, D., Scalabrin, A., (1992) Infrared Phys., 33 (6), p. 549Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1987) Appl. Phys. B, 44 (2), p. 11
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
- …
