A Case for Caution: An Evaluation of Calabrese and Baldwin\u27s Studies of Chemical Hormesis

Suggesting a need for more research, Mr. Elliott argues that it is too soon for risk-assessment policy to account for recent challenges to a toxicological linear dose-response assumption

Towards an understanding of corporate web identity

No abstract available

Hormone replacement therapy

Martha Hickey, Jane Elliott, Sonia Louise Daviso

Field induced gap infrared detector

A tunable infrared detector which employs a vanishing band gap semimetal material provided with an induced band gap by a magnetic field to allow intrinsic semiconductor type infrared detection capabilities is disclosed. The semimetal material may thus operate as a semiconductor type detector with a wavelength sensitivity corresponding to the induced band gap in a preferred embodiment of a diode structure. Preferred semimetal materials include Hg(1-x)Cd(x)Te, x is less than 0.15, HgCdSe, BiSb, alpha-Sn, HgMgTe, HgMnTe, HgZnTe, HgMnSe, HgMgSe, and HgZnSe. The magnetic field induces a band gap in the semimetal material proportional to the strength of the magnetic field allowing tunable detection cutoff wavelengths. For an applied magnetic field from 5 to 10 tesla, the wavelength detection cutoff will be in the range of 20 to 50 micrometers for Hg(1-x)Cd(x)Te alloys with x about 0.15. A similar approach may also be employed to generate infrared energy in a desired band gap and then operating the structure in a light emitting diode or semiconductor laser type of configuration

Triggered seismicity associated with the 1990 Nicoya, Costa Rica, M-w=7.0 earthquake

The 25 March 1990 (M-w = 7.0) subduction megathrust earthquake that occurred offshore the Nicoya Peninsula, Costa Rica, produced a large number of aftershocks on the subduction plate interface as expected and preceded an unusual sequence of earthquakes 75 km inland that had two periods of significant increase, one at 60-90 days and one near 270 days, following the main shock. This inland sequence of events would not typically fall within the classification of aftershocks given their spatial and temporal distance, and we show here that this sequence was likely triggered by the 25 March main shock. We compute stress changes on representative faults within this inland region using both a simple half-space model as well as with a 2-D finite element model that incorporates variable rheologic properties. The half-space model predicts a minor increase in Coulomb stress changes and a large amount of unclamping in this region, likely enough to cause triggering on the inland right-lateral strike-slip faults. Models that include a viscoelastic response also indicate stress increases that may link to triggering, particularly related to the time delay. Earthquakes on the subduction zone thrust along Costa Rica should be considered in hazard assessments for the inland populated region as several sets of strike-slip faults have been mapped in the fore-arc region

Toward an Agenda for Teacher Education in Christian Colleges and Universities

The first (United States of America) national symposium by major teacher educator organizations took place in December 1995. The Association of Teacher Educators, the American Association of Colleges for Teacher Education, and the US Department of Education Office of Educational Research and Improvement sponsored and conducted a National Congress on Teacher Education. Leading national figures in teacher education presented their views to the almost 500 delegates. Focus groups examined the views and reported to a conference coordinator. The coordinator, in turn, synthesized the concerns, ideas and recommendations into a daily log of issues. I list some of the salient points below. They do not reflect a consensus but, rather, a starting point for forging a national consensus on key issues

Leadership of Integrated Health and Social Care Services

This research explores the lived experience of those individuals charged with leading the integration of health and social care services in Scotland. The research was primarily qualitative in nature – comprising of a qualitative survey of front-line managers of integrated health and social care services from a single partnership area. The survey explored the management and leadership tasks and activities expected of those leading health and social care teams. The research uncovers a sense that these new leadership positions are both overwhelming in the scope of tasks required and lack clarity in how these tasks should be undertaken. This highlights a need for coordinated support and training for staff who are charged with leading integrated health and social care teams. Three key recommendations have been drawn from the findings of this research: more support should be provided to managers working within these complex integrated systems; a joint training programme should be developed for managers across both partnering organisations and finally relevant policies and procedures should be compiled into one reference resource for managers of integrated services

Loan loss provisioning in the commercial banking system of Barbados: practices and determinants

The purpose of this paper is to investigate the process of loan loss provisioning within the commercial banking system of Barbados. It uses questionnaires and interviews to ascertain how banks set their provisional standards and levels. In addition, the results from this approach reveal, for the first time in Barbados, the individual banks‟ procedures for loan loss provisioning. An evaluation of the impact of macroeconomic and bank specific factors on commercial banks‟ provisions utilising panel dynamic ordinary least squares is also undertaken. Both sets of factors are found to influence the level of provisions. In particular, loan loss provisions are heavily dependent upon the performance of the real economy and competition in international markets is shown to have serious implications for the banking sector in both the short and long run. Moreover, this study asserts that larger banks in Barbados are better able to screen loans and avoid defaults.Loan Loss Provisioning; Banking System; Loan Classification