Measurements at the southern magnetic conju- gate region of the fission debris from the starfish nuclear detonation

Measurement of fission products from Star Fish high-altitude nuclear explosion with recording gamma-ray spectromete

Correlation length by measuring empty space in simulated aggregates

We examine the geometry of the spaces between particles in diffusion-limited cluster aggregation, a numerical model of aggregating suspensions. Computing the distribution of distances from each point to the nearest particle, we show that it has a scaled form independent of the concentration phi, for both two- (2D) and three-dimensional (3D) model gels at low phi. The mean remoteness is proportional to the density-density correlation length of the gel, xi, allowing a more precise measurement of xi than by other methods. A simple analytical form for the scaled remoteness distribution is developed, highlighting the geometrical information content of the data. We show that the second moment of the distribution gives a useful estimate of the permeability of porous media.Comment: 4 page

The LRL electron and proton spectrometer on NASA's Orbiting Geophysical Observatory 5/E/ /instrumentation and calibration/

Systems analysis of electron and proton spectrometer on OGO-

Estudo cristaloquimico de rutílios inclusos em diamantes naturais

Rutile has been identified as syngenetic inclusion in detritic diamonds from Garças River (Mato Grosso State), and Caiapó River (Goiás State), Brazil. The inclusions, which are brown colored and prismatic in habit, have dimensions approximately 1 mm along the crystallographic c axis. The unit cell dimensions are a o = 4,59 Å and c o = 2,95 Å, measured in precession photographs. Microprobe analyses show that the rutile is almost depleted from chemical impurities; besides TiO2 whose content ranges around 99,7%, rutile contains less than 0,4% of Si, Al, Cr, Fe, Mg, Ca and Mn. Presumably, the inclusions, as well as their diamond hosts crystallized in an eclogitic environment, similar to the eclogite xenoliths found in kimberlites.Inclusões singenéticas de rutílio foram identificadas em diamantes aluvionares dos rios das Garças (Mato Grosso) e Caiapó (Goiás). As referidas inclusões constituem cristais prismáticos terminados, acentuadamente alongados na direção do eixo cristalográfico c; apresentam coloração castanha intensa e dimensões próximas de 1 mm na direção de maior alongamento dos cristais. Observações adicionais efetuadas por meio do microscópio eletrônico de varredura revelaram microestruturas concordantes com a simetria pontual do rutílio. As dimensões da cela unitária determinadas pelo método de precessão são: a o = 4,59 Å e c o = 2,95 Å. Os dados de composição química, obtidos com o auxílio da microssonda eletrônica, indicam que as inclusões de rutílios são próximas de estequimetria química e praticamente isentas de impurezas. Além do TiO2 , cuja média nas duas amostras analisadas é de 99,7%, os demais óxidos ocorrem em proporções menores de 0,4%. O teor baixo de Cr2O3 (< 0,2%) sugere que as inclusões de rutílio, e conseqüentemente os diamantes hospedeiros, cristalizaram-se a partir de uma assembléia mineralógica de natureza eclogítica

DESIGNING AND TESTING A PARK-BASED VISITOR SURVEY

This technical report is part of a broader national project ‘Systematic and strategic collection and use of visitor information in protected area management’, funded by Sustainable Tourism Cooperative Research Centre (STCRC), and conducted in partnership with protected area agencies across Australia. The aim of this report is to provide a systematic approach to using a set of core variables to collect data in a way that can be consistently applied across Australian protected areas. This information is most relevant to park-level management, but is also of central interest for corporate reporting. An associated aim was to develop and test a questionnaire for collecting these data. The questionnaire was developed and tested in collaboration with the WA Department of Environment and Conservation (WA DEC) and Parks Australia (PA). Surveys were conducted in Yanchep National Park, a moderately sized peri-urban park managed by WA DEC, in April 2008 and in Booderee National Park, NSW, which encompasses marine features and a botanic garden, and is managed by Parks Australia (PA), in January 2009. In WA following the survey, a focus group was held with staff to obtain their feedback on the efficacy of the questionnaire. The following recommendations are based on statistical analyses of the results, feedback from the focus group, and the observations of the researchers conducting the surveys

Presyncope Is Associated with Intensive Care Unit Admission in Emergency Department Patients with Acute Pulmonary Embolism

Introduction: Syncope is common among emergency department (ED) patients with acute pulmonary embolism (PE) and indicates a higher acuity and worse prognosis than in patients without syncope. Whether presyncope carries the same prognostic implications has not been established. We compared incidence of intensive care unit (ICU) admission in three groups of ED PE patients: those with presyncope; syncope; and neither.Methods: This retrospective cohort study included all adults with acute, objectively confirmed PE in 21 community EDs from January 2013–April 2015. We combined electronic health record extraction with manual chart abstraction. We used chi-square test for univariate comparisons and performed multivariate analysis to evaluate associations between presyncope or syncope and ICU admission from the ED, reported as adjusted odds ratios (aOR) with 95% confidence intervals (CI).Results: Among 2996 PE patients, 82 (2.7%) had presyncope and 109 (3.6%) had syncope. ICU admission was similar between groups (presyncope 18.3% vs syncope 25.7%) and different than their non-syncope counterparts (either 22.5% vs neither 4.7%; p&lt;0.0001). On multivariate analysis, both presyncope and syncope were independently associated with ICU admission, controlling for demographics, higher-risk PE Severity Index (PESI) class, ventilatory support, proximal clot location, and submassive and massive PE classification: presyncope, aOR 2.79 (95% CI, 1.40, 5.56); syncope, aOR 4.44 (95% CI 2.52, 7.80). These associations were only minimally affected when excluding massive PE from the model. There was no significant interaction between either syncope or presyncope and PESI, submassive or massive classification in predicting ICU admission.Conclusion: Presyncope appears to carry similar strength of association with ICU admission as syncope in ED patients with acute PE. If this is confirmed, clinicians evaluating patients with acute PE may benefit from including presyncope in their calculus of risk assessment and site-of-care decision-making

Cultural landscapes of tourism in New South Wales and Victoria

The field of cultural landscapes tourism is under-developed in Australia at the level of theory, research and policy development. Yet international research suggests that cultural landscapes tourism has significant potential in attracting new tourists. This research project is a scoping study designed to set out the parameters involved in cultural landscapes tourism research in Australia. It aims to identify how cultural heritage and contemporary cultural diversity impact on visitor experience and on local communities. The objective is to assist the Australian tourism industry particularly those located in regional and rural areas in understanding the growing importance of cultural tourism, by developing a number of case studies of cultural landscapes tourism in two Australia states. These case studies provide examples of existing tourism in a range of different cultural landscape sites, enabling the development of a process by which to identify change in cultural heritage tourism regions, including examining how multicultural precincts can operate as sustainable tourism destinations. Fieldwork with tourists and stakeholders will enable the development of industry strategies to increase tourism in the future. In addition, this fieldwork will facilitate the development of an innovative, multi-disciplinary theory of cultural landscapes tourism. This will set the stage for future research and policy development

Phase Control of Nonadiabaticity-induced Quantum Chaos in An Optical Lattice

The qualitative nature (i.e. integrable vs. chaotic) of the translational dynamics of a three-level atom in an optical lattice is shown to be controllable by varying the relative laser phase of two standing wave lasers. Control is explained in terms of the nonadiabatic transition between optical potentials and the corresponding regular to chaotic transition in mixed classical-quantum dynamics. The results are of interest to both areas of coherent control and quantum chaos.Comment: 3 figures, 4 pages, to appear in Physical Review Letter

Characterization of Knots and Links Arising From Site-specific Recombination on Twist Knots

We develop a model characterizing all possible knots and links arising from recombination starting with a twist knot substrate, extending previous work of Buck and Flapan. We show that all knot or link products fall into three well-understood families of knots and links, and prove that given a positive integer $n$, the number of product knots and links with minimal crossing number equal to $n$ grows proportionally to $n^5$. In the (common) case of twist knot substrates whose products have minimal crossing number one more than the substrate, we prove that the types of products are tightly prescribed. Finally, we give two simple examples to illustrate how this model can help determine previously uncharacterized experimental data.Comment: 32 pages, 7 tables, 27 figures, revised: figures re-arranged, and minor corrections. To appear in Journal of Physics

Unsteady turbulence in tidal bores: Effects of bed roughness

A tidal bore is a wave propagating upstream as the tidal flow turns to rising. It forms during spring tide conditions when the flood tide is confined to a narrow funneled channel. To date, theoretical and numerical studies rely upon physical experiments to validate the developments, but the experimental data are limited mostly to visual observations and sometimes free-surface measurements. Herein turbulent velocity measurements were obtained in a large-size laboratory facility with a fine spatial and temporal resolution. The instantaneous velocity measurements showed rapid flow deceleration at all vertical elevations, and large fluctuations of all velocity components were recorded beneath the bore and secondary waves. A comparison between undular (nonbreaking) and breaking bores suggested some basic differences. In an undular bore, large velocity fluctuations were recorded beneath the first wave crest and the secondary waves showing a long-lasting effect after the bore passage. In a breaking bore, some large turbulent stresses were observed next to the shear zone in a region of high velocity gradients, while some transient flow recirculation was recorded next to the bed. The effects of bed roughness were tested further. The boundary friction contributed to some wave attenuation and dispersion, and the free-surface data showed some agreement with the wave dispersion theory for intermediate gravity waves. The instantaneous velocity data showed however a significant effect of the boundary roughness on the velocity field next to the boundary (z/d(o)< 0.2) for both undular and breaking bores. Overall the findings were consistent with field observations of tidal bores and highlighted the significant impact of undular (nonbreaking) bores on natural systems