National strategy for serological diagnosis of HIV infection

No Abstrac

Pauli susceptibility of A3C60 (A=K, Rb)

The Pauli paramagnetic susceptibility of A3C60 (A= K, Rb) compounds is calculated. A lattice quantum Monte Carlo method is applied to a multi-band Hubbard model, including the on-site Coulomb interaction U. It is found that the many-body enhancement of the susceptibility is of the order of a factor of three. This reconciles estimates of the density of states from the susceptibility with other estimates. The enhancement is an example of a substantial many-body effect in the doped fullerenes.Comment: 4 pages, revtex, 2 figures, submitted to Phys. Rev. B more information at http://www.mpi-stuttgart.mpg.de/dokumente/andersen/fullerene

Using electronics to design a controlled environment

Design using a systems approach to electronics is easily realisable in schools. It is not being carried out in many schools because of the problems teachers have encountered in manufacturing electronic circuits and the pressures of the National Curriculum. The authors believe that designing electronic systems can play a stimulating and significant part in the design and technology curriculum. They have written a SATRO project to be published this Autumn that will encourage teachers to use electronics as a design medium and support them in carrying out the work. The focus of the project is using electronics to control environments. This paper will discuss the issues raised in writing the project and in piloting the work in school

An international educational perspective on technology and change

For a number of reasons design and technology has over the past decade played a very central and key role in educational reforms. Notably being at a pivotal point between core and foundation subjects, academic and vocational education and science and arts. This paper will research, reflect and synthesise other approaches to technology education in a number of other countries including England and Wales, Scotland, France, Germany, Denmark, Italy, Russia, Japan, USA, Canada, Australia plus one developing and one Eastern European country. Each of the selected countries will be analysed on the following profile along with a schematic over view of the educational system from its early years through to degree level. Historical perspective Overview and educational structure Technology including Information Technology and Vocational Education Key Points and Future aim

Developing information skills and system thinking: a resource-based approach to electronic control systems

This paper describes a curriculum development project that addresses the following issue: is it possible to engage pupils in procedures for developing an electronic control system which mirror those of professional engineering? In particular, two key aspects of professional practice were felt to be of critical importance. Firstly, engineers spend a great deal of time evaluating the potential of devices using data sheets. A major part of the development was concerned with developing data sheets for the units of a commercially available electronics systems kit. Secondly the development sought to emphasise system thinking by encouraging pupils to systematically plan their overall system, investigate possible sub-systems, conduct practical investigations and, only then, explore the detailed components required. The paper describes the outcome of the extensive school trials and presents the published materials

Design and technology preperation and provision - a pilot survey

The paper describes some findings of the preparations made for design and technology and work during the Autumn term of 1990 in a random sample of 28 primary and 27 secondary schools in England and Wales. A preliminary account of part of this survey was presented as DATER 90. The survey reveals: wide variations in the amount of time spent in preparation by schools; a significant minority of primary schools who reported no joint preparation or planning; wide variations in the amount of time devoted to design and technology in both primary and secondary schools; very few primary schools making use of food within design and technology; an overwhelming preponderance of CDT specialist appointed as design and technology coordinators in secondary schools with very few home economists

The Acoustic Peak in the Lyman Alpha Forest

We present the first simulation of the signature of baryonic acoustic oscillations (BAO) in Lyman alpha forest data containing 180,000 mock quasar sight-lines. We use eight large dark-matter only simulations onto which we paint the Lyman alpha field using the fluctuating Gunn-Peterson approximation. We argue that this approach should be sufficient for the mean signature on the scales of interest. Our results indicate that Lyman alpha flux provides a good tracer of the underlying dark matter field on large scales and that redshift space distortions are well described by a simple linear theory prescription. We compare Fourier and configuration space approaches to describing the signal and argue that configuration space statistics provide useful data compression. We also investigate the effect of a fluctuating photo-ionizing background using a simplified model and find that such fluctuations do add smooth power on large scales. The acoustic peak position is, however, unaffected for small amplitude fluctuations (<10%). Larger amplitude fluctuations make the recovery of the BAO signal more difficult and may degrade the achievable significance of the measurement.Comment: 10 pages, 8 figures; v2: minor revision matching version accepted by JCAP (new references, better figures, clarifications

Detecting the intermediate-mass Higgs boson through the associate production channel pp --> t + anti-t + H + X

We examine the detection of the intermediate-mass Higgs boson (IMH) at LHC through the associate production channel pp-->t+(anti-t)+H+X-->l+photon+ photon+X'. It is shown that by applying kinematic cuts or b-tagging on the final state jets, the main backgrounds of W(-->l+nu)+photon+photon+(n-jet) can be reduced substantially without significant loss of signals. It is possible to detect the Higgs boson at LHC through the pp-->t+(anti-t)+H+X channel using a modest photon detector with mass resolution of about 3% of the photon pair invariant mass.Comment: 10 pages, standard LaTex fil

Routine data linkage to identify and monitor diabetes in clozapine-treated patients with schizophrenia

No abstract available

In pursuit of causality in leadership training research: A review and pragmatic recommendations

Although research shows a reliable association between leadership training and positive organizational outcomes, a range of research design issues mean we do not know to what degree the former causes the later. Accordingly, the paper has two main aims. First, to describe the conditions necessary to determine causality in leadership training research and the ability of different research designs to achieve this. Six important, but often ignored, issues associated with determining causality are described (control conditions, sample representation, condition randomization, condition independence, temporal design, and author involvement). Second, to review the extent to which the leadership training literature is able to demonstrate causality. The review shows that the majority of studies do not meet many of the criteria, even the most basic criteria, required to establish causality. Finally, we provide guidelines for designing future research to improve causal identification and is capable of generating meaningful theory and policy recommendations