2,275 research outputs found
Electrical noise reduction techniques contributing to improved data quality at the National Transonic Facility
In initial use, the high-speed digital data acquisition systems at Langley Research Center's National Transonic Facility produced data containing unacceptably high noise levels. Described is a process whereby the contributing noise sources were identified and eliminated. The effects of 60 Hz power, system grounding, EMI/RFI, and other problems are discussed and the corrective action taken is outlined. The overall effort resulted in an improvement of greater than 5:1 in system performance. Although the report describes a system specifically used for wind tunnel data acquisition, the corrective techniques employed are generally applicable to large scale high-speed data systems where signal resolution in the low microvolts range is important
La producciĂłn de tejidos de lana de "fĂĄcil cuidado"
En los Ășltimos 10 Ăł 12 años la lana ha perdido muchos mercados. Parte de esta pĂ©rdida, al menos, puede ser atribuĂda a las caracterĂsticas de «fĂĄcil cuidado» de los tejidos fabricados con fibras sintĂ©ticas y mezclas de fibras sintĂ©ticas con lana, que han reemplazado a los tejidos 100 % lana en muchos campos, principalmente en gĂ©neros de punto, tapicerĂas y trajes relativamente ligeros. El trabajo de los institutos de investigaciĂłn lanera y del «Secretariado Internacional de la lana» se ha basado por tanto, no solamente en encontrar nuevos mĂ©todos de conferir el «fĂĄcil cuidado» a tejidos 100 % lana, sino en introducir lo mĂĄs rĂĄpidamente posible en la industria los nuevos procesos en la forma mĂĄs simple y barata. Los problemas inmediatos que se han afrontado ha cid@: encontrar mĂ©todos sencillos y simples de acabados resistentes a la polilla y al encogimiento; encontrar mĂ©todos, que pudiesen ser usados comercialmente para el fijado permanente de pantalones de hombre y plisado permanente de faldas de señora; y encontrar mĂ©todos de tratar tejidos de lana que permitiesen ser lavados sin requerir planchado despuĂ©s de secarlos:al aire o por secado forzado.Peer Reviewe
Residential Summer Camp Counselor Retention Rates Implications and Recommendations for Boys & Girls Clubs of Metro-Denverâs Gates Camp
Boys & Girls Clubs of Metro Denverâs Gates Camp is a residential summer camp in Ward, Colorado. There has been an observed and verified trend of a lack of returning staff, despite staff membersâ expressed positive experiences as a camp counselor. Returning staff improve the quality of programming for youth, by building upon their skills gained the previous summer and sharing their knowledge of the camp environment, culture and traditions with new staff. Through the use of a survey, completed by counselors who worked at Gates Camp between the summers of 2011 and 2016, trends as to why individuals choose to not return to camp emerged. Recommendations were made in accordance with such themes, and included: the addition of leadership activities for returning staff members, increasing the number of new hires in the 19 to 20 year old age bracket, and continuing to implement and expand upon staff culture building activities so as to capitalize on the positive, strong community that exists
Study protocol for a randomised controlled trial evaluating the effect of prenatal omega-3 LCPUFA supplementation to reduce the incidence of preterm birth: The ORIP trial
Introduction: Preterm birth accounts for more than 85% of all perinatal complications and deaths. Seventy-five per cent of early preterm births (EPTBs) occur spontaneously and without identifiable risk factors. The need for a broadly applicable, effective strategy for primary prevention is paramount. Secondary outcomes from the docosahexaenoic acid (DHA) to Optimise Mother Infant Outcome trial showed that maternal supplementation until delivery with omega-3 (Ï-3) long chain polyunsaturated fatty acid (LCPUFA), predominantly as DHA, resulted in a 50% reduction in the incidence of EPTB and an increase in the incidence of post-term induction or post-term prelabour caesarean section due to extended gestation. We aim to determine the effectiveness of supplementing the maternal diet with Ï-3 LCPUFA until 34 weeksâ gestation on the incidence of EPTB.
Methods and analysis: This is a multicentre, parallel group, randomised, blinded and controlled trial. Women less than 20 weeksâ gestation with a singleton or multiple pregnancy and able to give informed consent are eligible to participate. Women will be randomised to receive high DHA fish oil capsules or control capsules without DHA. Capsules will be taken from enrolment until 34 weeksâ gestation. The primary outcome is the incidence of EPTB, defined as delivery before 34 completed weeksâ gestation. Key secondary outcomes include length of gestation, incidence of post-term induction or prelabour caesarean section and spontaneous EPTB. The target sample size is 5540 women (2770 per group), which will provide 85% power to detect an absolute reduction in the incidence of preterm birth of 1.16% (from 2.45% to 1.29%) between the DHA and control group (two sided α=0.05). The primary analysis will be based on the intention-to-treat principle.
Trial registration number: Australia and New Zealand Clinical Trial Registry Number: 2613001142729; Pre-results
Towards a dialogical ethics of interprofessionalism
Contemporary medical practice brings a diverse range of professions and disciplines together in greater and closer contact. This situation of increasing complexity and changing professional roles gives rise to multifaceted ethical dilemmas and theoretical and practical concerns. In this essay we argue that for multidisciplinary relationships to be facilitated and to progress towards interdisciplinary teamwork, moral agents have to go beyond orthodox ethical systems and appeal to normative theory. We will argue that conceptualising ethics as a shared social practice may provide a useful starting point. This dialogic approach places greater emphasis on open deliberation and the articulation, negotiation, exploration and generation of new ethical perspectives in the here and now of clinical practice
The shock of the new: ethics, law and the introduction of public access defibrillation
There have been recent moves to include Public Access Defibrillation (PAD) in emergency response strategies. The value of this development is explored in this article. The benefits and limitations of extending AutomaticExternal Defibrillator (AED) use to non-traditional first responders, minimally trained witnesses and citizens are examined and the cost-effectiveness of such developments is discussed. The authors contend that, at the present time, enthusiasm for PAD would seem misplaced and that there is a series of economic, ethical and legal uncertainties that need to be addressed before widespread distribution of AED technology should be pursued
The Formation of the Double Pulsar PSR J0737-3039A/B
Recent timing observations of the double pulsar J0737-3039A/B have shown that
its transverse velocity is extremely low, only 10 km/s, and nearly in the Plane
of the Galaxy. With this new information, we rigorously re-examine the history
and formation of this system, determining estimates of the pre-supernova
companion mass, supernova kick and misalignment angle between the pre- and
post-supernova orbital planes. We find that the progenitor to the recently
formed `B' pulsar was probably less than 2 MSun, lending credence to
suggestions that this object may not have formed in a normal supernova
involving the collapse of an iron core. At the same time, the supernova kick
was likely non-zero. A comparison to the history of the double-neutron-star
binary B1534+12 suggests a range of possible parameters for the progenitors of
these systems, which should be taken into account in future binary population
syntheses and in predictions of the rate and spatial distribution of short
gamma-ray burst events.Comment: To appear in MNRAS Letters. Title typo fix only; no change to pape
Defining Medical Futility in Ethics, Law and Clinical Practice: An Exercise in Futility?
The debate as to the meaning of medical futility and what physicians should do in clinical practice dates back to the time of the writings of Hippocrates and Plato where it was said, "To attempt futile treatment is to display an ignorance that is allied to madness". In simpler times assertions regarding the obvious were sufficient to indicate what was thought "fitting" as a medical practitioner. In recent times, however, modern technology, professional values and power, patient autonomy, limited health care resources and societal expectations, make for a much more potent and potentially explosive mixture. In this article we argue that futility is a problem that will not go away, both because of increased health expectations and emerging technologies that keep making possible what was previously impossible. The problem of definition and its ramifications in terms of institutional policies is one in which the legal profession and its process (which often represents and reflects societal values) has a key role to play by way of critical reflection and appraisal
- âŠ