2,888 research outputs found
An Overview of Measurement Comparisons from the INTEX-B/MILAGRO Airborne Field Campaign
As part of the NASA's INTEX-B mission, the NASA DC-8 and NSF C-130 conducted three wing-tip to wing-tip comparison flights. The intercomparison flights sampled a variety of atmospheric conditions (polluted urban, non-polluted, marine boundary layer, clean and polluted free troposphere). These comparisons form a basis to establish data consistency, but also should also be viewed as a continuation of efforts aiming to better understand and reduce measurement differences as identified in earlier field intercomparison exercises. This paper provides a comprehensive overview of 140 intercomparisons of data collected as well as a record of the measurement consistency demonstrated during INTEX-B. It is the primary goal to provide necessary information for the future research to determine if the observations from different INTEX-B platforms/instrument are consistent within the PI reported uncertainties and used in integrated analysis. This paper may also contribute to the formulation strategy for future instrument developments. For interpretation and most effective use of these results, the reader is strongly urged to consult with the instrument principle investigator
Is the structure of 42Si understood?
A more detailed test of the implementation of nuclear forces that drive shell
evolution in the pivotal nucleus \nuc{42}{Si} -- going beyond earlier
comparisons of excited-state energies -- is important. The two leading
shell-model effective interactions, SDPF-MU and SDPF-U-Si, both of which
reproduce the low-lying \nuc{42}{Si}() energy, but whose predictions for
other observables differ significantly, are interrogated by the population of
states in neutron-rich \nuc{42}{Si} with a one-proton removal reaction from
\nuc{43}{P} projectiles at 81~MeV/nucleon. The measured cross sections to the
individual \nuc{42}{Si} final states are compared to calculations that combine
eikonal reaction dynamics with these shell-model nuclear structure overlaps.
The differences in the two shell-model descriptions are examined and linked to
predicted low-lying excited states and shape coexistence. Based on the
present data, which are in better agreement with the SDPF-MU calculations, the
state observed at 2150(13)~keV in \nuc{42}{Si} is proposed to be the ()
level.Comment: accepted in Physical Review Letter
Investigation of the structural basis of the interaction of calpain II with phospholipid and with carbohydrate
Diversity of animal communities on southwestern rangelands: Species patterns, habitat relationships, and land management
The rangelands of the southwestern United States comprise a mosaic of biome types, including deserts, grasslands, chaparral, woodlands, forests, subalpine meadows, and alpine tundra. Taken together, these ecosystems support exceptionally high numbers of vertebrate and invertebrate animal species. Biogeographic patterns of mammal, bird, and reptile species across North America show trends of increasing species numbers for these vertebrate groups, and some invertebrate groups, occur in Texas, New Mexico, Arizona, and California, especially in the border region with Mexico. Underlying causes of the region\u27s high biodiversity are related to (1) the elevational variability inherent in the basin-and-range topography, with its concomitant range of climate conditions, (2) the diverse biogeographic history of the region, particularly with respect to the merging of major faunal groups during glacier retreats, and (3) the architectural variations in vegetation structure across the region\u27s component ecosystems. Climate dynamics and disturbance also play major roles in maintaining a habitat mosaic, promoting greater regional faunal diversity. Disturbances affect animal diversity at many scales, from individuals\u27 home ranges to continental species\u27 distributions. Human activities have generated new suites of disturbances (livestock grazing, timber harvesting, mining, agriculture, prescribed fires, construction of roads and buildings), many of which contribute to the habitat patchiness of the landscape. Studies have shown that these disturbances prove beneficial to some species and detrimental to others. Hence, local increases in biodiversity can be orchestrated by creating or maintaining habitat diversity and disturbance regimes. Such management strategies can be scaled up to regional landscapes, in which areas of intensive human land use and disturbance are interspersed with regions of little or no human interference. Historically, this has been accomplished at local or state levels on an ad hoc bases (i.e., crisis management), with little evidence of long-term, large-scale, regional planning or coordination. If faunal biodiversity is to be preserved and enhanced on southwestern rangelands, human activities must be managed in a fashion that integrates faunal biology, resource requirements, and movement patterns with landscape scale attributes. Therefore, the task of the modern land manager will be to balance carefully the various scales and intensities of human activities, for the purpose of promoting sustainable use of natural resources and assuring the maintenance or enhancement of biodiversity. Future regional planning for biodiversity attributes will clearly require extensive communication and close cooperation among concerned citizens, private landowners, scientists, and government land managers
“It ain’t (just) what you do, it’s (also) the way that you do it”: The role of Procedural Justice in the Implementation of Anti-social Behaviour Interventions with Young People
This paper provides an analysis of the introduction and implementation of hybrid powers to regulate anti-social behaviour, during a period of regulatory ‘hyperactivity’ in the UK. It explores the role of procedural justice by drawing on findings from a study conducted in England which investigated the implementation practices and experiences of young people and parents. These are considered against seven characteristics of procedural justice: voice; voluntariness; respectful treatment; parsimony; accuracy of information; fairness; and neutrality. The paper analyses the manner in which principles of voluntary cooperation can be corrupted by threats of punitive sanctions. It questions the extent to which the use of such hybrid orders fosters perceptions of legitimacy and supports the capacity of young people to avoid criminalisation
Nonsteroidal anti-inflammatory drugs for pain in women with endometriosis.
BACKGROUND: Endometriosis is a common gynaecological condition that affects women and can lead to painful symptoms and infertility. It greatly affects women's quality of life, impacting their careers, everyday activities, sexual and nonsexual relationships and fertility. Nonsteroidal anti-inflammatory drugs (NSAIDs) are most commonly used as first-line treatment for women with pain associated with endometriosis. OBJECTIVES: To assess effects of NSAIDs used for management of pain in women with endometriosis compared with placebo, other NSAIDs, other pain management drugs or no treatment. SEARCH METHODS: We searched the Cochrane Gynaecology and Fertility Group Specialised Register of Controlled Trials (October 2016), published in the Cochrane Central Register of Controlled Trials (CENTRAL) in the Cochrane Library, as well as MEDLINE (January 2008 to October 2016), Embase (date limited from 1 January 2016 to 19 October 2016, as all earlier references are included in CENTRAL output as a result of the Embase project), registers of ongoing trials and the reference lists of relevant publications. We identified no new randomised controlled trials. Unless we identify new evidence in the future, we will not update this review. SELECTION CRITERIA: We included all randomised controlled trials (RCTs) describing use of NSAIDs for management of pain associated with endometriosis in women of all ages. DATA COLLECTION AND ANALYSIS: In the 2009 update of this review, two review authors (CA and SH) independently read and extracted data from each of the included studies. We analysed cross-over trials using the inverse variance method of RevMan to calculate odds ratios for binary outcomes. MAIN RESULTS: We identified no new trials for the 2016 update. This review includes two trials, but we included only one trial, with 24 women, in the analysis.The overall risk of bias was unclear owing to lack of methodological detail. Using the GRADE method, we judged the quality of the evidence to be very low. We downgraded evidence for risk of bias and for imprecision (wide confidence intervals and evidence based on a single small trial).Comparison of NSAIDs (naproxen) versus placebo revealed no evidence of a positive effect on pain relief (odds ratio (OR) 3.27, 95% confidence interval (CI) 0.61 to 17.69; one trial, 24 women; very low-quality evidence) in women with endometriosis. Evidence indicating whether women taking NSAIDs (naproxen) were less likely to require additional analgesia (OR 0.12, 95% CI 0.01 to 1.29; one trial, 24 women; very low-quality evidence) or to experience side effects (OR 0.46, 95% CI 0.09 to 2.47; one trial, 24 women; very low-quality evidence) when compared with placebo was inconclusive.Studies provided no data on quality of life, effects on daily activities, absence from work or school, need for more invasive treatment or participant satisfaction with treatment. AUTHORS' CONCLUSIONS: Owing to lack of high-quality evidence and lack of reporting of outcomes of interest for this review, we can make no judgement as to whether NSAIDs (naproxen) are effective in managing pain caused by endometriosis. No evidence shows whether any individual NSAID is more effective than another. As shown in other Cochrane reviews, women taking NSAIDs must be aware that these drugs may cause unintended effects
Thermal Hadron Production in High Energy Heavy Ion Collisions
We provide a method to test if hadrons produced in high energy heavy ion
collisions were emitted at freeze-out from an equilibrium hadron gas. Our
considerations are based on an ideal gas at fixed temperature , baryon
number density , and vanishing total strangeness. The constituents of this
gas are all hadron resonances up to a mass of 2 GeV; they are taken to decay
according to the experimentally observed branching ratios. The ratios of the
various resulting hadron production rates are tabulated as functions of
and . These tables can be used for the equilibration analysis of any heavy
ion data; we illustrate this for some specific cases.Comment: 12 pages (not included :13 figures + tables) report CERN-TH 6523/92
and Bielefeld preprint BI-TP 92/0
Strategies to promote children\u27s school based physical activity : Transform-Us! Mid-intervention findings
Session 202 - School based interventions: paper 276This journal suppl. entitled: Be Avtive 2012Many children engage in suboptimal levels of PA despite the associated health risks. Schools (n=20) in the Transform-Us! program were randomized to one of four intervention arms that target increases in children’s PA (PA), reductions in sedentary behavior (SB), both behaviors (SB+PA) or control current practice (C). This examination focuses on the PA promotion strategies employed in the PA and SB+PA arms compared with the C arm. To promote children’s PA each PA and SB+PA class was provided with sporting and circus equipment; asphalt line markings were installed at the school; and teachers were asked to encourage PA. Grade 3 children at participating schools were invited to take part in evaluation assessments including the completion of a self-report survey. Findings from the PA promotion strategy questions at baseline (Feb–June 2010), and T2 (Nov/Dec) are reported here. Children (n=425, 55% female) were asked to respond (yes/no) to five items asking about social support for PA from their class teacher, which were then summed to create a ‘teacher social support’ scale. Children were also asked to indicate if ‘there are markings on the walls or on the school playground to help us play games’ (perceived availability of line markings); if they are ‘allowed to use school sports equipment during recess and lunch breaks’ (perceived accessibility of sports equipment); and how much they like ‘the areas to play in at school’ using a 5-point Likert scale (perceived school environment). Between baseline and T2, teacher social support increased in both PA (1.7[1.4] vs 2.1[1.4]) and SB arms (1.9[1.4] vs 2.4[1.4) but declined in C (2.0[1.4] vs 1.7[1.5]). For all three arms, increases were seen in perceived availability of line markings (PA: 53.2% vs 69.4%; SB+PA: 59.3% vs 71.4%; C: 60.0% vs 69.8%); perceived accessibility of sport equipment (PA: 87.7% vs 97.2%: SB+PA: 80.7 vs 94%; C: 85.4% vs 97.6%); and perceived school environment (PA: 1.44[0.9] vs 1.42[0.8]; SB+PA: 1.5[0.8] vs 1.6[0.7]; C: 1.4[0.9] vs 1.5[0.7]) between baseline and T2. All findings were significant at a 1% probability level. At the mid-intervention time point, findings suggest that PA strategies have increased perceived availability of line markings, accessibility of sport equipment, and perceived school environment in children allocated to the PA and SB+PA arms. However, there were also unexpected increases in the C arm for three out of four items. Post-intervention findings will add to these preliminary findings
The energy source of the filaments around the giant galaxy NGC1275
The brightest galaxy in the nearby Perseus cluster, NGC1275, is surrounded by
a network of filaments. These were first observed through their Halpha emission
but are now known to have a large molecular component with a total mass
approaching 10^11Msun of gas. The filaments are embedded in hot intracluster
gas and stretch over 80 kpc. They have an unusual low excitation spectrum which
is well modelled by collisional heating and ionization by secondary electrons.
Here we note that the surface radiative flux from the outer filaments is close
to the energy flux impacting on them from particles in the hot gas. We propose
that the secondary electrons within the cold filaments, which excite the
observed submillimetre through UV emission, are due to the hot surrounding gas
efficiently penetrating the cold gas through reconnection diffusion. Some of
the soft X-ray emission seen from the filaments is then due to charge exchange,
although this is insufficient to account for all the observed X-ray flux. The
filaments are complex with multiphase gas. Interpenetration of hot and cold gas
leads to the filaments growing in mass, at a rate of up to 100Msunpyr. The lack
of soft X-ray cooling emission in cool core clusters is then due to the
non-radiative cooling of hot gas on mixing with cold gas around and within the
central galaxy.Comment: 7 pages, 4 figures, MNRAS in pres
Prevention is better than cure, but...: Preventive medication as a risk to ordinariness?
Preventive health remains at the forefront of public health concerns; recent initiatives, such as the NHS health check, may lead to recommendations for medication in response to the identification of 'at risk' individuals. Little is known about lay views of preventive medication. This paper uses the case of aspirin as a prophylactic against heart disease to explore views among people invited to screening for a trial investigating the efficacy of such an approach. Qualitative interviews (N=46) and focus groups (N=5, participants 31) revealed dilemmas about preventive medication in the form of clashes between norms: first, in general terms, assumptions about the benefit of prevention were complicated by dislike of medication; second, the individual duty to engage in prevention was complicated by the need not to be over involved with one's own health; third, the potential appeal of this alternative approach to health promotion was complicated by unease about the implications of encouraging irresponsible behaviour among others. Though respondents made different decisions about using the drug, they reported very similar ways of trying to resolve these conflicts, drawing upon concepts of necessity and legitimisation and the special ordinariness of the particular dru
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