CASCADE INVESTIGATION OF COOLING CHARACTERISTICS OF A CORRUGATEDINSERT AIR-COOLED TURBINE BLADE FOR USE IN A TURBOPROP ENGINE

Heat transfer of air-cooled turbine blade for turboprop engin

Discharge coefficients for thick-plate orifices

Investigation enables more accurate prediction of coolant flows within internally cooled turbine blades and vanes. The data is applicable for predicting flows in complex flow passages

Developing mental health education for health volunteers in a township in South Africa

Reproduced with permission of the publisher. © Cambridge University Press 2006.South Africa like many countries is moving towards a system of community care for people with mental health problems. This is set against a backdrop of under-resourced and overburdened services. These problems are particularly apparent in the township communities. The aim of this study was to devise an education programme for South African volunteer health workers using principles adapted from the UK evidence base for psychosocial intervention (PSI) and to evaluate the impact of the education programme on community volunteer health workers' knowledge about mental health issues. A stakeholder consultation exercise was held to explore: the context of South African services; the transferability of the UK evidence base and educational strategies to South Africa; and to inform the design of an educational programme. Evaluation of the community volunteer educational programme was undertaken using pre- and post-education focus groups. Twenty-one volunteers working with mentally ill people in the community from one township attended a three-day, six module course. After the course, volunteers: were able to articulate a greater range of aetiological and contributing factors to the development of mental health problems, including stress vulnerability and traditional belief frameworks; could describe a more humanistic model of mental health identification; identified a wider range of both formal and informal helping strategies; were more aware of the negative impact of interpersonal behaviours for people with mental health problems. Volunteer involvement has been confined to communicable diseases in South Africa. Volunteers educated about mental health care could assist in the South African policy of ‘horizontal’ integration of services into primary care from their current ‘vertical’, specialist-orientated structures

Photometric study of southern SU UMa-type dwarf novae and candidates -- III: NSV 10934, MM Sco, AB Nor, CAL 86

We photometrically observed four southern dwarf novae in outburst (NSV 10934, MM Sco, AB Nor and CAL 86). NSV 10934 was confirmed to be an SU UMa-type dwarf nova with a mean superhump period of 0.07478(1) d. This star also showed transient appearance of quasi-periodic oscillations (QPOs) during the final growing stage of the superhumps. Combined with the recent theoretical interpretation and with the rather unusual rapid terminal fading of normal outbursts, NSV 10934 may be a candidate intermediate polar showing SU UMa-type properties. The mean superhump periods of MM Sco and AB Nor were determined to be 0.06136(4) d and 0.08438(2) d, respectively. We suggest that AB Nor belongs to a rather rare class of long-period SU UMa-type dwarf novae with low mass-transfer rates. We also observed an outburst of the suspected SU UMa-type dwarf nova CAL 86. We identified this outburst as a normal outburst and determined the mean decline rate of 1.1 mag/d.Comment: 13 pages, 23 figures, to appear in MNRAS. For more information, see http://www.kusastro.kyoto-u.ac.jp/vsnet

An FeLoBAL Binary Quasar

In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67". Resolved spectra show that one component is a standard quasar with a blue continuum and broad emission lines; the other is a broad absorption line (BAL) quasar, specifically, a BAL QSO with prominent absorption from MgII and metastable FeII, making it a member of the ``FeLoBAL'' class. The number of known FeLoBALs has recently grown dramatically from a single example to more than a dozen, including a gravitationally lensed example and the binary member presented here, suggesting that this formerly rare object may be fairly common. Additionally, the presence of this BAL quasar in a relatively small separation binary adds to the growing evidence that the BAL phenomenon is not due to viewing a normal quasar at a specific orientation, but rather that it is an evolutionary phase in the life of many, if not all, quasars, and is particularly associated with conditions found in interacting systems.Comment: AASTEX 13 pp., 4 figs; accepted by ApJ Letter

Preliminary analysis of performance and loads data from the 2-megawatt mod-1 wind turbine generator

Preliminary test data on output power versus wind speed, rotor blade loads, system dynamic behavior, and start-stop characteristics on the Mod-1 wind turbine generator are presented. These data were analyzed statistically and are compared with design predictions of system performance and loads. To date, the Mod-1 wind turbine generator has produced up to 1.5 MW of power, with a measured power versus wind speed curve which agrees closely with design. Blade loads were measured at wind speeds up to 14 m/s and also during rapid shutdowns. Peak transient loads during the most severe shutdowns are less than the design limit loads. On the inboard blade sections, fatigue loads are approximately equal to the design cyclic loads. On the outboard blade sections, however, measured cyclic loads are significantly larger than design values, but they do not appear to exceed fatigue allowable loads as yet