Domain Walls and Spaces of Special Holonomy

We review the relations between a family of domain-wall solutions to M-theory and gravitational instantons with special holonomy. When oxidized into the maximal-dimension parent supergravity, the transverse spaces of these domain walls become cohomogeneity-one spaces with generalized Heisenberg symmetries and a homothetic conformal symmetry. These metrics may also be obtained as scaling limits of generalized Eguchi-Hanson metrics, or, with appropriate discrete identifications, from generalized Atiyah-Hitchin metrics, thus providing field-theoretic realizations of string-theory orientifolds

Domain Walls and the Universe

D=11 supergravity possesses D=5 Calabi-Yau compactified solutions that may be identified with the vacua of the Horava-Witten orbifold construction for M--theory/heterotic duality. The simplest of these solutions naturally involves two 3-brane domain walls, which may be identified with the orbifold boundary planes; this solution also possesses an unbroken $Z_2$ symmetry. Consideration of nearby excited solutions, truncated to the zero-mode and $Z_2$ invariant sector, yields an effective D=4 heterotic theory displaying chirality and N=1, D=4 supersymmetry

Emphatic agents to reduce user frustration: The effects of varying agent characteristics

There is now growing interest in the development of computer systems which respond to users’ emotion and affect. We report three small scale studies (with a total of 42 participants) which investigate the extent to which affective agents, using strategies derived from human-human interaction, can reduce user frustration within human-computer interaction. The results confirm the previous findings of Klein et al (2002) that such interventions can be effective. We also obtained results that suggest that embodied agents can be more effective at reducing frustration than non-embodied agents, and that female embodied agents may be more effective than male embodied agents. These results are discussed in light of the existing research literature

Non-critical d=2d=2 Gravities and Integrable Models

We review the origin of anomaly-induced dynamics in theories of $d=2$ gravity from a BRST viewpoint and show how quantum canonical transformations may be used to solve the resulting Liouville or Toda models for the anomalous modes

The 1930s origins of California's Farmworker-Church alliance

In the 1930s, Social Gospel ministers in the Los Angeles area organized to help farmworkers in Southern California. The reformist pastors worked across class, denominational, and racial lines and transcended language barriers as they built urban, coastal support for immigrant farmworkers in interior valleys. In the end, they failed, largely because employers were able to use the Communist affiliations of the farmworker union leaders to Red-bait and intimidate the ministers. Only when a later generation of labor leaders distanced their movement from Communism and grounded it in Christian rhetoric and imagery would this religious-labor alliance achieve victory

Symmetry Orbits of Supergravity Black Holes - In Honor of Andrei Slavnov's 75th Birthday

Black hole solutions of supergravity theories form families that realizing the deep nonlinear duality symmetries of these theories. They form orbits under the action of these symmetry groups, with extremal (i.e. BPS) solutions at the limits of such orbits. An important technique in the analysis of such solution families employs timelike dimensional reduction and exchanges the stationary black-hole problem for a nonlinear sigma-model problem. Families of extremal or BPS solutions are characterized by nilpotent orbits under the duality symmetries, based upon a tri-graded or penta-graded decomposition of the corresponding duality-group algebra

Profile of Clients Seeking Consultation at Yoga Therapy Department: A Cross Sectional Study

It is estimated that between 10% and 30% of the general practice population are mentally or emotionally disturbed. Physical complaints, multiple aches and pains are construed as signs and symptoms of stress. Although yoga is considered as beneficial, any hidden psychiatric morbidity may go undetected and thus untreated. Thus the aim of this study was to obtain an estimate of hidden psychiatric morbidity in clients seeking consultation at the Department of Yoga. Fifty respondents were administered Life Satisfaction Scale and General Health Questionnaire-12. Majority were females, younger, graduates, married and also scored above the cut off on GHQ, suggesting minor psychiatric disorder/distress; reasons for consultation were related to being over weight, stress, aches and pains, poor concentration. A significant number of persons reported of some dissatisfaction in life. The perceived benefits were related to reducing symptoms, stress, weight, relaxation and improvement in concentration and memory

Towards a tool for the subjective assessment of speech system interfaces (SASSI)

Applications of speech recognition are now widespread, but user-centred evaluation methods are necessary to ensure their success. Objective evaluation techniques are fairly well established, but previous subjective techniques have been unstructured and unproven. This paper reports on the first stage of the development of a questionnaire measure for the Subjective Assessment of Speech System Interfaces (SASSI). The aim of the research programme is to produce a valid, reliable and sensitive measure of users' subjective experiences with speech recognition systems. Such a technique could make an important contribution to theory and practice in the design and evaluation of speech recognition systems according to best human factors practice. A prototype questionnaire was designed, based on established measures for evaluating the usability of other kinds of user interface, and on a review of the research literature into speech system design. This consisted of 50 statements with which respondents rated their level of agreement. The questionnaire was given to users of four different speech applications, and Exploratory Factor Analysis of 214 completed questionnaires was conducted. This suggested the presence of six main factors in users' perceptions of speech systems: System Response Accuracy, Likeability, Cognitive Demand, Annoyance, Habitability and Speed. The six factors have face validity, and a reasonable level of statistical reliability. The findings form a userful theoretical and practical basis for the subjective evaluation of any speech recognition interface. However, further work is recommended, to establish the validity and sensitivity of the approach, before a final tool can be produced which warrants general use

Older adults' comprehension of speech as interactive domestic alarm system output: A field study

Please contact the publisher for further reprinting or re-use.A rapidly ageing population has led to the development of Interactive Domestic Alarm Systems (IDASs) to assist older adults with independent living. This research considers the use of speech as IDAS output and the impact the domestic environment may have on older adults’ comprehension of speech outputs. This paper introduces IDASs, the benefits of employing speech as a mode of system output and the critical design issue of user comprehension. Extending previous laboratory studies (see Lines & Hone, 2002a, Lines & Hone, 2002b, Lines & Hone, 2002c) a field investigation is reported that considers older adults’ comprehension of speech gender and speech type [natural/synthetic] within the domestic environment. The main findings are discussed and future research directions explored