328 research outputs found
Raman Measurements And Lattice Dynamics In The High Tc Superconductor Yba2cu3o7
No full textThe Raman spectra of the superconducting oxygen-deficient perovskite YBa2Cu3O7 have been measured as a function of temperature in four different kind of samples. The spectra of one of the samples show eleven well resolved peaks. A group theoretical analysis of the basis vectors enables us to obtain a picture for some of the normal modes of vibration. We did not observe any change in the high frequency modes across the superconducting phase transition. © 1987.644505508Bednorz, Müller, Possible highT c superconductivity in the Ba?La?Cu?O system (1986) Zeitschrift f�r Physik B Condensed Matter, 69, p. 189Wu, Ashburn, Torny, Hor, Meng, Gao, Huang, Chu, (1987) Phys. Rev. Lett., 58, p. 908Y. Yeshurun, I. Felner, and H. Sompolinsky, Phys. Rev. B, Rapid Communications to be publishedSiegrist, Sunshine, Murphy, Cava, Zahurak, (1987) Phys. Rev. B, 35, p. 7137Takayama-Muromachi, Uchida, Yukino, Tanaka, Kato, Point-Contact Spectroscopy of 3D Transition-Metal Intercalate FexTiS2 (1987) Japanese Journal of Applied Physics, 26, p. 663C. Rettori, Dan Davidov, Igal Belaish, and Israel Felner, Phys. Rev. B submittedBatlogg, Cava, Jayaraman, van Dover, Kourouklis, Sunshine, Murphy, Rietman, (1987) Phys. Rev. Lett., 58, p. 2333Compaan, Cummins, (1972) Phys. Rev. B, 6, p. 4753Bonn, Greedan, Stager, Timusk, Doss, Herr, Karamas, Tanner, (1987) Phys. Rev. Lett., 58, p. 2249Hemley, Mao, (1987) Phys. Rev. Lett., 58, p. 234
Major life events, hassles, and adaptation in adolescence: A comparison of alternative theoretical models using structural equation modeling
No full textPrevious work in the adolescent life stress literature has, for the most part, been guided by epidemiological models of life stress and adjustment, in which stressful life events are assumed to contribute to later psychopathology in a direct, etiologic fashion. There has been little attention directed towards understanding the complex processes through which life events impact adjustment. In addition, the vast majority of existing studies have relied on cross-sectional methodologies and have been plagued by a variety of methodological and conceptual limitations, including operational confounding among self-report measures of life stress and adjustment.With these considerations in mind, the present study sought to explore the prospective relationships between major life events, daily hassles and adjustment in a rural, low-SES adolescent sample. Five theoretically-based models were constructed and compared using structural equation modeling techniques. Results of these analyses indicated that a transactional-ecological model of life stress and adjustment, in which the impact of major life events was mediated by daily hassles, produced the best fit to the data. The implications of these findings for the development of integrative theoretical models of life stress and adjustment are discussed.Made available in DSpace on 2011-05-07T12:41:20Z (GMT). No. of bitstreams: 2
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Previous issue date: 1991Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding ([email protected]) on 2011-05-07T14:44:23Z
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A prospective investigation of the effects of socioeconomic disadvantage, life stress, and social support on early adolescent adjustment
No full text"Recent epidemiological studies have highlighted the alarming rate at which children and adolescents are experiencing serious problems while growing up and later, ""rotten"" outcomes as adults. Frequent problems relating to emotional and behavioral adaptation, as well as high rates of academic failure have been documented in this work. It is increasingly recognized that in order to achieve a substantial reduction in these numbers, prevention and public policy strategies will need to be implemented on a wide-scale and sustained basis. However, the knowledge base required for such efforts to be effective and cost-efficient is not yet adequately developed. Knowledge of the effects of the social and environmental context on child and adolescent adaptation is especially limited. The current study sought to further investigate this issue among a sample of 339 young adolescents who attended a grade 7-8 middle school. Utilizing a longitudinal design, the study examined the relation of initial levels of socio-environmental conditions to levels of adjustment at follow-up seven months later. Measures of socio-environmental conditions assessed socioeconomic resources, stressful life events, and social supports. Measures of adjustment assessed emotional, behavioral, and academic adaptation. Findings indicated a substantial relation between initial socio-environmental conditions and adjustment at follow-up. Specifically, composite indices of socio-environmental variables accounted for between 25 and 30 percent of the variance in composite indices of follow-up adjustment. A significant relation between initial socio-environmental conditions and subsequent adjustment also was found in prospective analyses which controlled statistically for initial levels of adjustment. Socioeconomic variables were related mostly closely to indices of academic adaptation, whereas life stress and social support variables were associated most strongly with indices of emotional and behavioral adaptation. Interactions among socio-environmental variables were also found. These findings indicated that the relation of stress and support variables to indices of adaptation was stronger among youth who experienced single or multiple conditions of socioeconomic disadvantage in comparison to those who did not experience any conditions of disadvantage. The discussion focuses on the contribution of socio-environmental conditions to adaptation during early adolescence and potential implications for preventive intervention."Made available in DSpace on 2011-05-07T14:15:29Z (GMT). No. of bitstreams: 2
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Previous issue date: 1992Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding ([email protected]) on 2011-05-07T15:04:43Z
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Evidence For Dynamic Effects In The Esr Spectra Of The High Tc Superconductor Yba2cu3o7
No full textThe ESR spectra of the high Tc superconductor YBa2Cu3O7 show the structure corresponding to the Cu2+ (3d9, S= 1 2, I= 3 2) ions in an anisotropic environment and in the presence of rapid oscillating distortions. © 1987.64710431045Bednorz, Muller, Possible highT c superconductivity in the Ba?La?Cu?O system (1986) Zeitschrift f�r Physik B Condensed Matter, 69 B, p. 189Wu, Asburn, Torny, Hor, Meng, Gao, Huang, Chu, (1987) Phys. Rev. Lett., 58, p. 908Siegrist, Sunshine, Murphy, Cava, Zahurak, (1987) Phys. Rev., 35 B, p. 7137Hazen, Finger, Angel, Prewitt, Ross, Mao, Hadidiacos, Chu, (1987) Phys. Rev., 35 B, p. 7238RETTORI C., DAVIDOV D., BELAISH I. & FELNER I., submitted to Phys. Rev. BKitazawa, Atake, Ishii, Sato, Takagi, Uchida, Saito, Tanaka, (1987) Jap. Journal of Applied Phys. Letters, 26, p. 748Orton, Auzins, Griffiths, Wertz, (1961) Proc. Phys. Soc. (London), 78, p. 554Coffman, Jahn-Teller Effect in the EPR Spectrum of Cu++: MgO at 1.2°K (1968) The Journal of Chemical Physics, 48, p. 609Che, McEwan, Wenger, Logothetis, Determination of charge carriers in superconducting La-Ba-Cu-O by thermoelectric measurements (1987) Physical Review B, 35 B, p. 7124BIANCONI A., CLOZZA A., CONGIU CASTELLANO A., DELLA LONGA S., DE SANTIS M., DI CICCO A., GARG K., DELOGU P., GARGANO A., GIORGI R., LAGARDE P., FLANK A.M., & MARCELLI A. (to be published)Hoeck, Nickisch, Thomas, (1983) Helvetica Physica Acta, 56, p. 237Chakraverty, (1979) Journal de Physique (Letters), 40, p. 99Kamimura, Cooperative Bipolaron Tunneling in HighTcCopper Oxide Compounds and Superconductivity (1987) Japanese Journal of Applied Physics, 26, p. L62
Environmental Incongruence and Divergence in Ratings of Adaptation Among Elementary School Children
No full textConsistent with transactional theories of personality, studies of teacher and parent ratings of child behavioral adaptation suggest marked divergence between classroom and home levels of adaptation. Differential levels of child adaptation have been found to be linked with perceived classroom and family environment. From a ecological perspective, behavioral adaptation would diverge between the school and the family to the extent that the adaptational demands of these setting are incongruent with one another. Further, greater environmental incongruence might be associated with higher levels of overall psychological distress.As expected, the present study found greater divergence between teacher and parent ratings to be related with greater incongruence between perceived classroom and family environment. However, higher levels of psychological distress were not associated with greater incongruence. Thus, environmental incongruence might be linked with differential patterns of situationally-specific behavioral adaptation, rather than levels of overall distress or negative affect. Implications for ecological models of adaptation are discussed.Made available in DSpace on 2014-12-17T20:25:14Z (GMT). No. of bitstreams: 1
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Previous issue date: 1992Embargo set by: Seth Robbins for item 72280
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Determinants of parent-child interaction in adolescent mothers
No full textThis study examines the relationships between five maternal variables related to the quality of interactions between adolescent mothers and their infants. Maternal variables are: general knowledge of developmental milestones, accuracy of knowledge of one's own child's development, locus of control, self-efficacy, and age. Accuracy of knowledge of one's own child's development was found to be the most significant predictor of the quality of parent-child interaction. While this finding is preliminary and needs to be investigated further, it offers interesting consideration to the development of interventions that promote positive and supportive interactions between adolescent mothers and their infants.Made available in DSpace on 2011-05-07T14:10:10Z (GMT). No. of bitstreams: 2
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Previous issue date: 1993Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding ([email protected]) on 2011-05-07T15:03:43Z
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The Israeli AI Community
No full textThis column provides an encounter with the Artificial Intelligence research community in the state of Israel. The first section introduces this community and its special attributes. The second section provides overview on some recent research projects done in Israel. The author serves as the chair of the Israeli AI association</jats:p
Magnetization Measurement Of A Possible High-temperature Superconducting State In Amorphous Carbon Doped With Sulfur
No full textMagnetization M (T,H) measurements performed on thoroughly characterized commercial amorphous carbon powder doped with sulfur (AC-S), revealed the occurrence of an inhomogeneous superconductivity (SC) below Tc =38 K. The constructed magnetic field-temperature (H-T) phase diagram resembles that of type-II superconductors. However, AC-S demonstrates a number of anomalies, such as: (1) a nonmonotonic behavior of the lower critical-field Hc1 (T); (2) a pronounced positive curvature of the apparent upper critical-field boundary Hc2 (T); and (3) a spontaneous ferromagneticlike magnetization M0 coexisting with SC. Based on the analysis of experimental results we propose a nonstandard SC state in AC-S. © 2009 The American Physical Society.7923Black-Schaffer, A.M., Doniach, S., (2007) Phys. Rev. B, 75, p. 134512. , 10.1103/PhysRevB.75.134512Uchoa, B., Castro Neto, A.H., (2007) Phys. Rev. Lett., 98, p. 146801. , 10.1103/PhysRevLett.98.146801Honerkamp, C., (2008) Phys. Rev. Lett., 100, p. 146404. , 10.1103/PhysRevLett.100.146404Kopnin, N.B., Sonin, E.B., (2008) Phys. Rev. Lett., 100, p. 246808. , 10.1103/PhysRevLett.100.246808Sasaki, K.-I., (2007) J. Phys. Soc. Jpn., 76, p. 033702. , 10.1143/JPSJ.76.033702Ghaemi, P., Wilczek, F., arXiv:0709.2626 (unpublished)Khveshchenko, D.V., (2009) J. Phys.: Condens. Matter, 21, p. 075303. , 10.1088/0953-8984/21/7/075303Pathak, S., Shenoy, V.B., Baskaran, G., arXiv:0809.0244 (unpublished)Panigrahi, P., Vyas, V., Shreecharan, T., arXiv:0901.1034 (unpublished)Geim, A.K., MacDonald, A.H., (2007) Phys. Today, 60 (8), p. 35. , 10.1063/1.2774096Kopelevich, Y., Esquinazi, P., (2007) Adv. Mater., 19, p. 4559. , 10.1002/adma.200702051Castro Neto, A.H., (2009) Rev. Mod. Phys., 81, p. 109. , 10.1103/RevModPhys.81.109Hebard, A.F., (1991) Nature (London), 350, p. 600. , 10.1038/350600a0Tanigaki, K., (1991) Nature (London), 352, p. 222. , 10.1038/352222a0Da Silva, R.R., Torres, J.H.S., Kopelevich, Y., (2001) Phys. Rev. Lett., 87, p. 147001. , 10.1103/PhysRevLett.87.147001Hai-Peng, Y., (2001) Chin. Phys. Lett., 18, p. 1648. , 10.1088/0256-307X/18/12/332Moehlecke, S., Kopelevich, Y., Maple, M.B., (2004) Phys. Rev. B, 69, p. 134519. , 10.1103/PhysRevB.69.134519Weller, T.E., (2005) Nat. Phys., 1, p. 39. , 10.1038/nphys0010Emery, N., (2005) Phys. Rev. Lett., 95, p. 087003. , 10.1103/PhysRevLett.95.087003Ekimov, E.A., (2004) Nature (London), 428, p. 542. , 10.1038/nature02449Ortolani, M., (2006) Phys. Rev. Lett., 97, p. 097002. , 10.1103/PhysRevLett.97.097002Tang, Z.K., (2001) Science, 292, p. 2462. , 10.1126/science.1060470Takesue, I., (2006) Phys. Rev. Lett., 96, p. 057001. , 10.1103/PhysRevLett.96.057001Anderson, P.W., (1987) Science, 235, p. 1196. , 10.1126/science.235.4793.1196Gonzalez, J., Guinea, F., Vozmediano, M.A.H., (2001) Phys. Rev. B, 63, p. 134421. , 10.1103/PhysRevB.63.134421Samokhin, K.V., (2002) Phys. Rev. B, 66, p. 212509. , 10.1103/PhysRevB.66.212509Kopelevich, Y., Esquinazi, P., (2007) J. Low Temp. Phys., 146, p. 629. , 10.1007/s10909-006-9286-5Ivanov, D.A., (2001) Phys. Rev. Lett., 86, p. 268. , 10.1103/PhysRevLett.86.268Harris, P.J.F., Burian, A., Duber, S., (2000) Philos. Mag. Lett., 80, p. 381. , 10.1080/095008300403512Shibayama, Y., Sato, H., Enoki, T., Endo, M., (2000) Phys. Rev. Lett., 84, p. 1744. , 10.1103/PhysRevLett.84.1744Deutscher, G., Entin-Wohlman, O., Shapira, Y., (1980) Phys. Rev. B, 22, p. 4264. , 10.1103/PhysRevB.22.4264Zavaritsky, V.N., Kabanov, V.V., Alexandrov, A.S., (2002) Europhys. Lett., 60, p. 127. , 10.1209/epl/i2002-00329-2Blatter, G., Ivlev, B.I., (1994) Phys. Rev. B, 50, p. 10272. , 10.1103/PhysRevB.50.10272Li, Q., Toner, J., Belitz, D., (2007) Phys. Rev. Lett., 98, p. 187002. , 10.1103/PhysRevLett.98.187002Knigavko, A., Rosenstein, B., (1999) Phys. Rev. Lett., 82, p. 1261. , 10.1103/PhysRevLett.82.126
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