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Search Results: 1 - 10 of 10644 matches for " Carmen Dolan "
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The Beacon of Kac-Moody Symmetry for Physics
L. Dolan
Physics , 1996,
Abstract: The role of Kac-Moody algebras in exploiting symmetries of particle physics and string theory is described.
Gauge Symmetry in Background Charge Conformal Field Theory
L. Dolan
Physics , 1996, DOI: 10.1016/S0550-3213(97)00003-5
Abstract: We present a mechanism to construct four-dimensional charged massless Ramond states using the discrete states of a fivebrane Liouville internal conformal field theory. This conformal field theory has background charge, and admits an inner product which allows positive norm states. A connection among supergravity soliton solutions, Liouville conformal field theory, non-critical string theory and their gauge symmetry properties is given. A generalized construction of the SU(2) super Kac-Moody algebra mixing with the N=1 super Virasoro algebra is analyzed. How these Ramond states evade the DKV no-go theorem is explained.
Co-Variant Derivatives And The Renormalisation Group
Brian Dolan
Physics , 1994, DOI: 10.1142/S0217751X95001170
Abstract: The renormalisation group equation for $N$-point correlation functions can be interpreted in a geometrical manner as an equation for Lie transport of amplitudes in the space of couplings. The vector field generating the diffeomorphism has components given by the $\beta$-functions of the theory. It is argued that this simple picture requires modification whenever any one of the points at which the amplitude is evaluated becomes close to any other. This modification requires the introduction of a connection on the space of couplings and new terms appear in the renormalisation group equation involving co-variant derivatives of the $\beta$-function and the curvature associated with the connection. It is shown how the connection is related to the operator expansion co-efficients, but there remains an arbitrariness in its definition.
TASI Lectures on Perturbative String Theory and Ramond-Ramond Flux
L. Dolan
Physics , 2002,
Abstract: These lectures provide an introduction to perturbative string theory and its construction on spaces with background Ramond flux. Traditional covariant quantization of the string and its connection with vertex operators and conformal invariance of the worldsheet theory are reviewed. A supersymmetric covariant quantization of the superstring in six and ten spacetime dimensions is discussed. Correlation functions are computed with these variables. Applications to strings in anti-de Sitter backgrounds with Ramond flux are analyzed. Based on lectures presented at the Theoretical Advanced Study Institute TASI 2001, June 3-29, 2001.
Vertex Operators for AdS3 with Ramond Background
L. Dolan
Mathematics , 2000, DOI: 10.1063/1.1373423
Abstract: This review gives results on vertex operators for the Type IIB superstring in an AdS3 x S3 background with Ramond-Ramond flux, which were presented at Strings 2000. Constraint equations for these vertex operators are derived, and their components are shown to satisfy the supergravity linearized equations of motion for the six-dimensional (2,0) theory of a supergravity and tensor multiplet expanded around AdS3 x S3 spacetime.
The utility of the Historical Clinical Risk -20 Scale as a predictor of outcomes in decisions to transfer patients from high to lower levels of security-A UK perspective
Mairead Dolan, Regine Blattner
BMC Psychiatry , 2010, DOI: 10.1186/1471-244x-10-76
Abstract: The sample was predominately male and mentally ill and the majority of cases were detained under the criminal section of the Mental Health Act (1986). The HCR-20 was rated based on detailed case file information on 72 cases transferred from high to medium security. Outcomes were examined, independent of risk score, and cases were classed as "success or failure" based on established criteria.The mean length of follow up was 6 years. The total HCR-20 score was a robust predictor of failure at lower levels of security and return to high security. The Clinical and Risk management items contributed most to predictive accuracy.Although the HCR-20 was designed as a violence risk prediction tool our findings suggest it has potential utility in decisions to transfer patients from high to lower levels of security.Over the last 3 decades there have been significant developments in the field of violence risk assessment and management. It is increasingly recognized that individuals with mental disorder have an increased (4 to 6 times higher) risk of committing a violent crime [1,2]. Since the work of Monahan [3] unstructured clinical approaches to risk assessment in psychiatric patients have been questioned due to their low levels of accuracy. The literature suggests that there are a number of factors that are associated with violence and poor outcome in patients discharged from civil and forensic settings including major mental illness, substance abuse and psychopathy [4-7]. Over the last 15 years there have been notable developments in systematizing the risk assessment field which have led to the introduction of a number of risk assessment tools that provide a more structured approach to decision making [6,8,9]. The latter Structured Professional Judgment (SPJ) approach provides guidelines for assessing risk using systematized, empirically based, risk factors that can be coded but can still allow flexibility to take account of case-specific issues. One of the most researched i
Sterility and Stigma in an Era of HIV/AIDS: Narratives of Risk Assessment among Men and Women in Botswana
RL Upton, EM Dolan
African Journal of Reproductive Health , 2011,
Abstract: This paper examines the experience and interpretations of infertility and sterility in northern Botswana. Specifically it highlights the role of stigma and impression management among Tswana men and women through their narratives and discourse about childbearing and personhood in an era of HIV/AIDS. The paper demonstrates that in a country with one of the highest HIV/AIDS infection rates in the world, risky sexual practices are weighed against cultural norms that suggest being a full person and productive adult is to be a reproductive man or woman. Through longitudinal qualitative research the narratives and life histories of several individuals offer ethnographic evidence on the power of stigma. The research finds that even with ubiquitous HIV/AIDS education and prevention programmes throughout Botswana, Tswana engage in various kinds of risk taking behaviours as means through which impressions and identities as full persons of value may be managed successfully (Afr J Reprod Health 2011; 15[1]: 95-100).
Modular Symmetry and Fractional Charges in N = 2 Supersymmetric Yang-Mills and the Quantum Hall Effect
Brian P. Dolan
Symmetry, Integrability and Geometry : Methods and Applications , 2007,
Abstract: The parallel r les of modular symmetry in N = 2 supersymmetric Yang-Mills and in the quantum Hall effect are reviewed. In supersymmetric Yang-Mills theories modular symmetry emerges as a version of Dirac's electric - magnetic duality. It has significant consequences for the vacuum structure of these theories, leading to a fractal vacuum which has an infinite hierarchy of related phases. In the case of N = 2 supersymmetric Yang-Mills in 3+1 dimensions, scaling functions can be defined which are modular forms of a subgroup of the full modular group and which interpolate between vacua. Infra-red fixed points at strong coupling correspond to θ-vacua with θ a rational number that, in the case of pure SUSY Yang-Mills, has odd denominator. There is a mass gap for electrically charged particles which can carry fractional electric charge. A similar structure applies to the 2+1 dimensional quantum Hall effect where the hierarchy of Hall plateaux can be understood in terms of an action of the modular group and the stability of Hall plateaux is due to the fact that odd denominator Hall conductivities are attractive infra-red fixed points. There is a mass gap for electrically charged excitations which, in the case of the fractional quantum Hall effect, carry fractional electric charge.
The Isolation of Online Adjunct Faculty and its Impact on their Performance
Véra Dolan
International Review of Research in Open and Distance Learning , 2011,
Abstract: Using a grounded theory qualitative research approach, this article examines the experiences of 28 adjunct faculty members who work at the same university, exploring their views on whether periodically meeting face-to-face with management and peers has the potential to affect their motivation on the job and consequently the quality of education they provide to students. A few management representatives also shared their perspectives on the phenomenon; this enabled the researcher to compare the views of these two populations on whether face-to-face contact among faculty enhances teaching performance. The results of this study suggest a few issues that online schools must address in their efforts to improve adjuncts’ sense of affiliation and loyalty to their institution, which in turn will positively affect student retention levels. The main issues of concern to adjunct faculty are (a) inadequate frequency and depth of communication, regardless of the means used, whether online or face-to-face; (b) lack of recognition of instructors’ value to the institution; and (c) lack of opportunities for skill development.
The Crusades and church art in the era of Las Navas de Tolosa
Miguel Dolan Gómez
Anuario de Historia de la Iglesia , 2011,
Abstract: El arte y la arquitectura de las iglesias románicas están llenos de manifestaciones fascinantes de la ideología de la cruzada en la Península Ibérica durante los siglos xii y xiii. Las escenas de combate, imitaciones del Santo Sepulcro y las grandes visiones escatológicas de la victoria cristiana aparecieron en las decoraciones de iglesias. Este fenómeno está muy bien expuesto en dos iglesias de la ciudad de Toledo, en que la victoria de las Navas de Tolosa (1212) se celebra con vívidas imágenes apocalípticas e inscripciones latinas. Sin embargo, las mismas iglesias incorporan estilos artísticos del mundo Islámico, lo que indica la complejidad de la guerra santa en el mundo cultural de la Espa a medieval.
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