Attitudes of secondary school children to science, with special reference to differences in sex, age, ability and type of o-level course

Related work was reviewed and fitted into a general scheme. A Thurstone attitude scale was constructed in a split-half form (19+19) to test attitudes to school science and science in general. Another, based on this, was constructed to test attitudes to school physics and physics in general. Reliabilities of both scales were 0.80 or more. The sample was 1066 pupils aged 11+ years 15+ years in grammar and modern schools. This sample was found to be significantly favourable to science and the grammar school sample was more favourable than the modern school sample. The younger pupils were more favourable in attitude than older pupils and boys were more favourable to science than girls. The samples were matched for proportions of each sex. Using the attitude to physics scale, 117 fourth-year pupils of four grammar schools which taught physics according to the Nuffield foundation scheme were compared with 117 fourth-year pupils from equivalent streams in four grammar schools which taught physics in a conventional manner. There was no evidence to support the hypothesis that the Nuffield scheme produced more favourable attitudes to physics than conventional approaches. There was a little evidence to support the view that a conventional approach produced more favourable attitudes to physics. Some evidence was presented to show a small, significant and positive correlation between attitude to science and attainment in science. A model for simulating responses to the scales was constructed and compared favourably with the results

A New Study of the Transition to Uniform Nuclear Matter in Neutron Stars and Supernovae

A comprehensive microscopic study of the properties of bulk matter at densities just below nuclear saturation $\rho_s = 2.5 \sim 10^{14}$ g cm$^{-3}$, zero and finite temperature and high neutron fraction, is outlined, and preliminary results presented. Such matter is expected to exist in the inner crust of neutron stars and during the core collapse of massive stars with $M \gtrsim 8M_{\odot}Comment: 4 pages, 2 figures. Participant Contribution at the ``Dense Matter in Heavy Ion Collisions and Astrophysics" Summer School, JINR, Dubna, Aug. 21 - Sept. 1, 2006. To be published in PEPAN letter

ELBOW FLEXOR MUSCLE FUNCTION AND UPPER ARM GIRTH FOLLOWING CONCURRENT STRENGTH AND ENDURANCE TRAINING IN NON RESISTANCETRAINED FEMALES

The study investigated the effects of eight weeks of concurrent muscular strength and endurance resistance training of the non-dominant elbow flexors on muscular strength, endurance, and upper arm girths of previously non resistance-trained females. Subjects (n=12) were assigned to one of 3 training groups. These groups were Strength (S), Endurance (E), or Combined (C) with pre and post-training tests for arm girths, 1 RM preacher curl, maximal isometric torque, peak isokinetic torque at velocities of 30 and 90" s-', and total work during 25 continuous repetitions at 90"s.'. Significant increases in prepost strength and endurance occurred in both C and S groups, but not E, in the absence of any change in arm girth. Furthermore, C training produced equivalent gains in strength and endurance to the S and E groups, respectively

Mesh-free simulation of complex LCD geometries

We use a novel mesh-free simulation approach to study the post aligned bistable nematic (PABN) cell. By employing the Qian-Sheng formalism for liquid crystals along with a smooth representation of the surface posts, we have been able to identify two distinct stable configurations. The three-dimensional order field configurations of these states and their elastic free energies are consistent with both experimental results and previous simulation attempts. However, alternative states suggested in previous studies do not appear to remain stable when finite post curvature is considered.</p

Detection of antibody-dependent complement mediated inactivation of both autologous and heterologous virus in primary HIV-1 infection

Specific CD8 T-cell responses to human immunodeficiency virus type 1 (HIV-1) are induced in primary infection and make an important contribution to the control of early viral replication. The importance of neutralizing antibodies in containing primary viremia is questioned because they usually arise much later. Nevertheless antienvelope antibodies develop simultaneously with, or even before, peak viremia. We determined whether such antibodies might control viremia by complement-mediated inactivation (CMI). In each of seven patients studied, antibodies capable of CMI appeared at or shortly after the peak in viremia, concomitantly with detection of virus-specific T-cell responses. The CMI was effective on both autologous and heterologous HIV-1 isolates. Activation of the classical pathway and direct viral lysis were at least partly responsible. Since immunoglobulin G (IgG)-antibodies triggered the CMI, specific memory B cells could also be induced by vaccination. Thus, consideration should be given to vaccination strategies that induce IgG antibodies capable of CMI

The Response to a Perturbation in the Reflection Amplitude

We apply inverse scattering theory to calculate the functional derivative of the potential $V(x)$ and wave function $\psi(x,k)$ of a one-dimensional Schr\"odinger operator with respect to the reflection amplitude $r(k)$.Comment: 16 pages, no figure

The geographical distribution of Kaposi's sarcoma and of lymphomas in Africa before the AIDS epidemic.

Estimated incidence rates are presented for three human immunodeficiency virus (HIV)-associated cancers [Kaposi's sarcoma (KS), Burkitt's lymphoma (BL) and other non-Hodgkin's lymphomas (NHLs)] from across the African continent, based on data collected before the HIV epidemic. Mapping of the rates and comparisons with a range of geographical variables indicate completely different distributions for KS and BL but a degree of similarity in the occurrence of Burkitt's lymphoma and other NHLs. Comparisons with rates elsewhere in the world suggest, most notably, that KS was as common in some regions of sub-Saharan Africa as was cancer of the colon in much of Western Europe. Comparison with data from the era of AIDS indicates 20-fold increases in the occurrence of Kaposi's sarcoma in Uganda and Zimbabwe. The highest rates for BL were three to four times the rates for leukaemia at young ages in Western populations, but the general incidence of other NHL was no higher than in the West and very low rates were indicated for much of southern Africa

End stage heart failure patients: Palliative care in general practice

Background. Chronic heart failure is common, particularly in older individuals, and comorbidities are frequent. Patients with end stage heart failure can be highly symptomatic and require careful monitoring and treatment adjustment to improve symptoms. Objective. This article summarises the fundamentals of implementing palliative care in general practice and provides guidelines on caring patients with chronic heart failure at the end of life. Discussion. The high mortality in chronic heart failure underscores the importance of effective communication, symptom management and advance care planning. The unpredictability and uncertainty around the timing of death mean that individuals, and their families, may be less likely to have an understanding of their prognosis or have access to supportive and palliative care. Ideally, patients with symptomatic chronic heart failure should be managed in collaboration with a multidisciplinary heart failure program. Symptom management can be achieved by additive therapies and access to specialist palliative care services should be considered when the symptom burden is high

Global Atmospheric Change and Its Effect on Managed Grassland Systems

Key points 1. Increasing atmospheric CO2 concentration and a trend to warmer mean temperatures are the most reliable aspects of global atmospheric change. Projections of the extent of climate change and the frequency of extreme weather conditions remain uncertain. 2. Research has considerably reduced the uncertainty about effects of global atmospheric change on physiology of plants, productivity and species composition of plant communities. 3. Other factors (e.g. nutrient availability, soil type) and long-term adaptation of the ecosystem (e.g. nutrient cycling and sequestration) influence the response of plant communities to global atmospheric change. Generalisation is not possible with respect to the response of different pasture and rangeland systems. 4. In temperate grasslands with regular fertilisation and defoliation, the effects of elevated CO2 may be smaller than those of climate and/or management. Adaptations in management can help to mitigate effects of global atmospheric change

Boundary conditions at spatial infinity for fields in Casimir calculations

The importance of imposing proper boundary conditions for fields at spatial infinity in the Casimir calculations is elucidated.Comment: 8 pages, 1 figure, submitted to the Proceedings of The Seventh Workshop QFEXT'05 (Barcelona, September 5-9, 2005