Simulation-Based Training Improves Student Assessment of Oral Feeding Skills in Preterm Infants

Advancements in medical technology have contributed to increased rates of preterm birth. Prematurity places infants at high risk for feeding difficulties, however. Early identification and assessment of preterm infant dysphagia is critical to maximize nutrition and hydration, feeding safety, and growth and development. The purpose of this study was to assess the ability of a simulation-based training toolto increase non-health care and entry-level clinical student sensitivity to signs of feeding distress in preterm infants. Data were collected from 60 students (20 masters-level Speech-Language Pathology, 20 undergraduate nursing, 20 undergraduate non-health care) in a pre-test/post-test design. All participants completed a brief simulation training protocol, and accuracy percentages were calculated based on their ability to determine the following: physiological and behavioral signs of feeding distress, oral feeding skill level (OFS), and clinical recommendation for further feeding evaluation. Our results revealed that this simulation-based training improved the identification of behavioral (p \u3c 0.001) and physiological (p \u3c 0.001) signs of feeding distress, OFS level (p \u3c 0.001), and ability to make appropriate clinical recommendations (p \u3c 0.001).This study has identified a successful method to effectively train entry-level clinical and non-clinical students to screen feeding skills in preterm infants. This training approach has the potential to improve identification of feeding distress and to recognize the need for a dysphagia evaluation to optimize clinical outcomes in this fragile population

On Secure Implementation of an IHE XUA-Based Protocol for Authenticating Healthcare Professionals

The importance of the Electronic Health Record (EHR) has been addressed in recent years by governments and institutions.Many large scale projects have been funded with the aim to allow healthcare professionals to consult patients data. Properties such as confidentiality, authentication and authorization are the key for the success for these projects. The Integrating the Healthcare Enterprise (IHE) initiative promotes the coordinated use of established standards for authenticated and secure EHR exchanges among clinics and hospitals. In particular, the IHE integration profile named XUA permits to attest user identities by relying on SAML assertions, i.e. XML documents containing authentication statements. In this paper, we provide a formal model for the secure issuance of such an assertion. We first specify the scenario using the process calculus COWS and then analyse it using the model checker CMC. Our analysis reveals a potential flaw in the XUA profile when using a SAML assertion in an unprotected network. We then suggest a solution for this flaw, and model check and implement this solution to show that it is secure and feasible

Entanglement Percolation with Bipartite Mixed States

We develop a concept of entanglement percolation for long-distance singlet generation in quantum networks with neighboring nodes connected by partially entangled bipartite mixed states. We give a necessary and sufficient condition on the class of mixed network states for the generation of singlets. States beyond this class are insufficient for entanglement percolation. We find that neighboring nodes are required to be connected by multiple partially entangled states and devise a rich variety of distillation protocols for the conversion of these states into singlets. These distillation protocols are suitable for a variety of network geometries and have a sufficiently high success probability even for significantly impure states. In addition to this, we discuss possible further improvements achievable by using quantum strategies including generalized forms of entanglement swapping.Comment: 6+ pages, 5 figures; Published versio

Managing Dynamic User Communities in a Grid of Autonomous Resources

One of the fundamental concepts in Grid computing is the creation of Virtual Organizations (VO's): a set of resource consumers and providers that join forces to solve a common problem. Typical examples of Virtual Organizations include collaborations formed around the Large Hadron Collider (LHC) experiments. To date, Grid computing has been applied on a relatively small scale, linking dozens of users to a dozen resources, and management of these VO's was a largely manual operation. With the advance of large collaboration, linking more than 10000 users with a 1000 sites in 150 counties, a comprehensive, automated management system is required. It should be simple enough not to deter users, while at the same time ensuring local site autonomy. The VO Management Service (VOMS), developed by the EU DataGrid and DataTAG projects[1, 2], is a secured system for managing authorization for users and resources in virtual organizations. It extends the existing Grid Security Infrastructure[3] architecture with embedded VO affiliation assertions that can be independently verified by all VO members and resource providers. Within the EU DataGrid project, Grid services for job submission, file- and database access are being equipped with fine- grained authorization systems that take VO membership into account. These also give resource owners the ability to ensure site security and enforce local access policies. This paper will describe the EU DataGrid security architecture, the VO membership service and the local site enforcement mechanisms Local Centre Authorization Service (LCAS), Local Credential Mapping Service(LCMAPS) and the Java Trust and Authorization Manager.Comment: Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 7 pages, LaTeX, 5 eps figures. PSN TUBT00

Far-ultraviolet Spectroscopy of Venus and Mars at 4 A Resolution with the Hopkins Ultraviolet Telescope on Astro-2

Far-ultraviolet spectra of Venus and Mars in the range 820-1840 A at 4 A resolution were obtained on 13 and 12 March 1995, respectively, by the Hopkins Ultraviolet Telescope (HUT), which was part of the Astro-2 observatory on the Space Shuttle Endeavour. Longward of 1250 A, the spectra of both planets are dominated by emission of the CO Fourth Positive band system and strong OI and CI multiplets. In addition, CO Hopfield-Birge bands, B - X (0,0) at 1151 A and C - X (0,0) at 1088 A, are detected for the first time, and there is a weak indication of the E - X (0,0) band at 1076 A in the spectrum of Venus. The B - X band is blended with emission from OI 1152. Modeling the relative intensities of these bands suggests that resonance fluorescence of CO is the dominant source of the emission, as it is for the Fourth Positive system. Shortward of Lyman-alpha, other emission features detected include OII 834, OI lambda 989, HI Lyman-beta, and NI 1134 and 1200. For Venus, the derived disk brightnesses of the OI, OII, and HI features are about one-half of those reported by Hord et al. (1991) from Galileo EUV measurements made in February 1990. This result is consistent with the expected variation from solar maximum to solar minimum. The ArI 1048, 1066 doublet is detected only in the spectrum of Mars and the derived mixing ratio of Ar is of the order of 2%, consistent with previous determinations.Comment: 8 pages, 5 figures, accepted for publication in ApJ, July 20, 200

Curricular orientations to real-world contexts in mathematics

A common claim about mathematics education is that it should equip students to use mathematics in the ‘real world’. In this paper, we examine how relationships between mathematics education and the real world are materialised in the curriculum across a sample of eleven jurisdictions. In particular, we address the orientation of the curriculum towards application of mathematics, the ways that real-world contexts are positioned within the curriculum content, the ways in which different groups of students are expected to engage with real-world contexts, and the extent to which high-stakes assessments include real-world problem solving. The analysis reveals variation across jurisdictions and some lack of coherence between official orientations towards use of mathematics in the real world and the ways that this is materialised in the organisation of the content for students

Determination of Molecular Dissociation Rates from Measurements of Scattered Solar Ultraviolet Light

Scattereds olaru ltravioletl ight in the spectral region from 250 to 320 nm was measured from a balloon platform at altitudes ranging from 14.5 to 38.8 km with a wavelengthr esolutiono f approximately0 .3 nm and an accuracyin determiningth ew avelengthp ositiono f 0.5 nm. We usedt heses catterd atat o comparea ndv alidatea single scatteringm odel developedf or this purpose. Using these semi-empiricarl esults,w e constructedth e singles cattered component of the ultraviolet irradiance as a function of height and wavelength. From these data, it is possible to determinet he percentaged issociationra te of a variety of speciesd ue to scatteredu ltravioletr adiation. Theser esults are presenteda s a ratio of intensitiesR = I•/(I0+I0, where I• is the first order scatteringa nd I0 is the direct attenuated radiation from the sun. The attenuated direct radiation from the sun can be multiplied by the factor 1/(l-R), the Rayleigha mplificationr atio usedb y Nicolet et al. (1982), to include the contribution to the irradiance from first order scattered light. The results are multiplied by a cross sectiono f the speciesu nder considerationto obtain the dissociationra tes. Ozoneo verburdena nd an approximate ozone particle density altitude profile are obtained when validating the single scatter model

Blaming the victim: assessment, examinations, and the responsibilisation of students and teachers in neo-liberal governance

Historically, for a period of a hundred years or more from the 1860s to the 1960s, assessment developed as an educational technology for selecting and certificating small numbers of individual students. This process was largely focused on excluding the majority. Over the last 30–40 years, the focus and purpose of assessment has changed. The emphasis is now on education for all and the development of a fit-for-purpose assessment system as a system, that is, as part of an integrated approach to national human resource development. These changes have been both driven by, and contributed to, the development of the knowledge economy and neo-liberalism. Students and teachers have been ‘responsibilised’ for the quality and outcomes of education, with assessment and examinations providing the quintessential vehicle for individualising and responsibilising success and failure in relation to achievement and social mobility

Overview of the Far Ultraviolet Spectroscopic Explorer Mission

The Far Ultraviolet Spectroscopic Explorer satellite observes light in the far-ultraviolet spectral region, 905 - 1187 A with high spectral resolution. The instrument consists of four coaligned prime-focus telescopes and Rowland spectrographs with microchannel plate detectors. Two of the telescope channels use Al:LiF coatings for optimum reflectivity from approximately 1000 to 1187 A and the other two use SiC coatings for optimized throughput between 905 and 1105 A. The gratings are holographically ruled to largely correct for astigmatism and to minimize scattered light. The microchannel plate detectors have KBr photocathodes and use photon counting to achieve good quantum efficiency with low background signal. The sensitivity is sufficient to examine reddened lines of sight within the Milky Way as well as active galactic nuclei and QSOs for absorption line studies of both Milky Way and extra-galactic gas clouds. This spectral region contains a number of key scientific diagnostics, including O VI, H I, D I and the strong electronic transitions of H2 and HD.Comment: To appear in FUSE special issue of the Astrophysical Journal Letters. 6 pages + 4 figure