You can lead a horse to water… are clinical students getting the message about the library and information skills support that is available?

Cambridge University Library is the recipient of a grant from the Arcadia Trust to investigate issues and challenges in delivering academic library services in the digital era. One project under this auspice has been IRIS: Induction, Research and Information Skills, which attempted to map the information skills and needs of students at Cambridge University. The results of this study will be used to provide information in planning future services and facilities for students. Students were invited to complete an online survey asking about which online information resources they use most frequently, from whom they hear about new resources, and where they go for help with information-seeking. Librarians across the tripartite Cambridge system, in 60 college, department, and University libraries, were also surveyed with regard to what training, induction, and support they offered and to whom. This article will focus on the responses of 115 medical students who participated in the survey, accounting for 6.5% of the total survey responses. While acknowledging that student respondents were self-selecting, the results raise questions about how well the librarians’ message is getting across and how librarians can better serve students in the digital age

Temporary Protection: Towards a New Regional and Domestic Framework

During the past thirty-five years, the United States has seen the direct influx of thousands of individuals leaving politically unstable countries. While some seeking entry have proved themselves to be refugees and obtained permanent protection in the United States, far more, including a large number of people fleeing civil war, natural disasters, or comparable forms of upheaval in their home countries, have failed to demonstrate that they would be targets of persecution. Yet, their return to their home countries has been complicated by the very circumstances that led to their flight: conflict, violence, and repression. Over time, the United States developed a series of ad hoc responses that protected such individuals, culminating in the Immigration Act of 1990 (“IMMACT”), which provided legislative authority for Temporary Protected Status (“TPS”). Nevertheless, after eight years, many problems remain in the application of the law. Solving these problems will contribute both to better immigration control and more humane responses to future crises. Current policies fail on two accounts. First, the temporary protection provision in the law generally has failed to protect the vast majority of those in danger as a crisis develops and unfolds. If the United States government protects significant numbers at all, protection is provided outside the confines of the United States. Even so, the mechanisms for responding extraterritorially are not well developed. Second, current policies regarding protection in the United States do not provide the control mechanisms to ensure that protection is not abused and that return, when appropriate, is effected. The choice to admit people for temporary protection has been a difficult one for the United States for two main reasons: the lack of control over entry; and the inability to implement a fair but firm end game. These constraints together with the fear of litigation challenging domestic protection regimes have led policymakers to keep protection seekers offshore, such as on Guantanamo, or to return them directly to countries they fled without providing an opportunity for them to present requests for protection. But not having a fully developed regional or domestic capability for addressing these complex movements comes at a considerable cost. Estimates for the agency costs of handling the 1994 Cuban exodus through the use of offshore safe havens were more than $500 million. Further, an immigration system that cannot fairly and efficiently process protection seekers lacks credibility for which it pays a significant public cost

New way to achieve chaotic synchronization in spatially extended systems

We study the spatio-temporal behavior of simple coupled map lattices with periodic boundary conditions. The local dynamics is governed by two maps, namely, the sine circle map and the logistic map respectively. It is found that even though the spatial behavior is irregular for the regularly coupled (nearest neighbor coupling) system, the spatially synchronized (chaotic synchronization) as well as periodic solution may be obtained by the introduction of three long range couplings at the cost of three nearest neighbor couplings.Comment: 5 pages (revtex), 7 figures (eps, included

Women's Intentions to Engage in Risk-Reducing Behaviours after Receiving Personal Ovarian Cancer Risk Information: An Experimental Survey Study

Risk stratification using genetic and/or other types of information could identify women at increased ovarian cancer risk. The aim of this study was to examine women's potential reactions to ovarian cancer risk stratification. A total of 1017 women aged 45-75 years took part in an online experimental survey. Women were randomly assigned to one of three experimental conditions describing hypothetical personal results from ovarian cancer risk stratification, and asked to imagine they had received one of three results: (a) 5% lifetime risk due to single nucleotide polymorphisms (SNPs) and lifestyle factors; (b) 10% lifetime risk due to SNPs and lifestyle factors; (c) 10% lifetime risk due to a single rare mutation in a gene. Results: 83% of women indicated interest in having ovarian cancer risk assessment. After receiving their hypothetical risk estimates, 29% of women stated they would have risk-reducing surgery. Choosing risk-reducing surgery over other behavioural responses was associated with having higher surgery self-efficacy and perceived response-efficacy, but not with perceptions of disease threat, i.e., perceived risk or severity, or with experimental condition. A substantial proportion of women age 45-75 years may be open to the idea of surgery to reduce risk of ovarian cancer, even if their absolute lifetime risk is only increased to as little as 5 or 10%

Benchmarking 2D hydraulic models for urban flood simulations

This paper describes benchmark testing of six two-dimensional (2D) hydraulic models (DIVAST, DIVASTTVD, TUFLOW, JFLOW, TRENT and LISFLOOD-FP) in terms of their ability to simulate surface flows in a densely urbanised area. The models are applied to a 1·0 km × 0·4 km urban catchment within the city of Glasgow, Scotland, UK, and are used to simulate a flood event that occurred at this site on 30 July 2002. An identical numerical grid describing the underlying topography is constructed for each model, using a combination of airborne laser altimetry (LiDAR) fused with digital map data, and used to run a benchmark simulation. Two numerical experiments were then conducted to test the response of each model to topographic error and uncertainty over friction parameterisation. While all the models tested produce plausible results, subtle differences between particular groups of codes give considerable insight into both the practice and science of urban hydraulic modelling. In particular, the results show that the terrain data available from modern LiDAR systems are sufficiently accurate and resolved for simulating urban flows, but such data need to be fused with digital map data of building topology and land use to gain maximum benefit from the information contained therein. When such terrain data are available, uncertainty in friction parameters becomes a more dominant factor than topographic error for typical problems. The simulations also show that flows in urban environments are characterised by numerous transitions to supercritical flow and numerical shocks. However, the effects of these are localised and they do not appear to affect overall wave propagation. In contrast, inertia terms are shown to be important in this particular case, but the specific characteristics of the test site may mean that this does not hold more generally

Acceptability of risk-stratified breast screening: Effect of the order of presenting risk and benefit information

OBJECTIVE: To test whether reduced-frequency risk-stratified breast screening would be perceived more favourably by transposing the order of information on benefits and risks. METHODS: After reading vignettes describing non-stratified three-yearly screening and a risk-stratified alternative with five-yearly invitations for women at low risk, 698 women completed an online survey. Participants were allocated at random to information on screening benefits followed by risks, or vice versa, and asked to state preferences for either screening system. Participants also rated perceived magnitude of screening benefits and risks, and breast cancer susceptibility. RESULTS: Binomial logistic regression did not find order effects on preferences (p = 0.533) or perceived benefits of screening (p = 0.780). Perceived screening risks were greater when risks were presented first (p < 0.0005). Greater perceived susceptibility was associated with lower proportions preferring risk-stratified screening (15% vs. 39% in highest and lowest groups; p = 0.002), as were greater perceived screening benefits (e.g. 13% vs. 45% in highest and lowest groups; p < 0.0005). CONCLUSIONS: No information order effect on preferences was observed. Information order did affect screening risk perceptions. Efforts to improve perceptions may need to be more intensive than those tested. Women perceiving themselves as high risk or perceiving greater benefits of screening may be particularly averse to less frequent screening

Late Wisconsin glaciation of Hadwen and Summer islands, Tuktoyaktuk Coastlands, NWT, Canada

The exact timing of the last major advance of the Laurentide Ice Sheet onto the Beaufort Sea coastlands of western Arctic Canada is unclear but significant to our understanding of landscape change and palaeo-ice stream chronology. Optical stimulated luminescence dating of preglacial and postglacial aeolian sand from Hadwen and Summer islands, in the Tuktoyaktuk Coastlands, indicates that glaciation took place between about 17.5 and 15 ka, and most likely between 16.6 and 15.9 ka, coinciding with Heinrich event 1. At this time the Mackenzie Trough palaeo-ice stream advanced into a cold-climate sandy desert, interrupting aeolian activity

Continuum removal in H\alpha\ extragalactic measurements

We point out an important source of error in measurements of extragalactic H-alpha emission and suggest ways to reduce it. The H-alpha line, used for estimating star formation rates, is commonly measured by imaging in a narrow band and a wide band, both which include the line. The image analysis relies on the accurate removal of the underlying continuum. We discuss in detail the derivation of the emission line's equivalent width and flux for extragalactic extended sources, and the required photometric calibrations. We describe commonly used continuum-subtraction procedures, and discuss the uncertainties that they introduce. Specifically, we analyse errors introduced by colour effects. We show that the errors in the measured H-alpha equivalent width induced by colour effects can lead to underestimates as large as 40% and overestimates as large as 10%, depending on the underlying galaxy's stellar population and the continuum-subtraction procedure used. We also show that these errors may lead to biases in results of surveys, and to the underestimation of the cosmic star formation rate at low redshifts (the low z points in the Madau plot). We suggest a method to significantly reduce these errors using a single colour measurement.Comment: 8 pages, 3 figures, MNRAS in pres

Cyclotron effect on coherent spin precession of two-dimensional electrons

We investigate the spin dynamics of high-mobility two-dimensional electrons in GaAs/AlGaAs quantum wells grown along the $[001]$ and $[110]$ directions by time-resolved Faraday rotation at low temperatures. In measurements on the $(001)$-grown structures without external magnetic fields, we observe coherent oscillations of the electron spin polarization about the effective spin-orbit field. In non-quantizing magnetic fields applied normal to the sample plane, the cyclotron motion of the electrons rotates the effective spin-orbit field. This rotation leads to fast oscillations in the spin polarization about a non-zero value and a strong increase in the spin dephasing time in our experiments. These two effects are absent in the $(110)$-grown structure due to the different symmetry of its effective spin-orbit field. The measurements are in excellent agreement with our theoretical model.Comment: 4 pages, 3 figure