2,968 research outputs found

    Pulmonary function evaluation during and following Skylab space flights

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    Previous experience during the Apollo postflight exercise testing indicated no major changes in pulmonary function. Although pulmonary function has been studied in detail following exposure to hypoxic and hyperoxic environments, few studies have dealt with normoxic environments at reduced total pressure as encountered during the Skylab missions. Forced vital capacity was measured during the preflight and postflight periods of the Skylab 2 mission. Initial in-flight measurements of vital capacity were obtained during the last two weeks of the second manned mission (Skylab 3). Comprehensive pulmonary function screening was accomplished during the Skylab 4 mission. The primary measurements made during Skylab 4 testing included residual volume determination, closing volume, vital capacity, and forced vital capacity and its derivatives. In addition, comprehensive in-flight vital capacity measurements were made during the Skylab 4 mission. Vital capacity was decreased slightly during flight in all Skylab 4 crewmen. No major preflight to postflight changes were observed in the other parameters

    Achieving competence-based curriculum in Engineering Education in Spain

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    5 tables, 5 figures, 10 pagesThe fact of placing competences and outcomes learning at the heart of the academic activity means overhauling the curricular architecture of higher education in Europe. Some universities have undergone important transformations moving toward a competence-based learning environment, while others maintain traditional curriculum packaged formats. In the realm of the European Higher Education Area, this paper examines the use of competence-based initiatives in curricular development for engineering degrees with special focus to the Spanish case. Although the concept of competence and competence-based learning has a long history in education and training research, these terms are still very diffuse and demand a clear conceptualization. In the first part of this paper, we provide a conceptual overview and a critical reflection of competences as implemented in a wide range of settings, including its origins, key concepts, and definitions. Next, we discuss the purposes, principles, pitfalls, and processes that enable defining a map of competences within engineering education. Lastly, we present a pilot project involving curriculum development and faculty enhancement within a competence-based learning initiative in Electronic Engineering.This work was supported in part by the Program of European Convergence (Universidad Politécnica de Valencia) and developed within the Project of Adaptation to the European Higher Education in the School of Design Engineering.Peer reviewe

    Radio Luminosities and Classificatory Criteria of BL Lacertae Objects

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    Using the sample of radio selected BL Lacertae objects (RBLs) and X-ray selected BL Lacertae objects (XBLs) presented by Sambruna et al. (1996), we calculated the luminosities of radio, optical and X-ray of each source and made the statistical analysis among the luminosities at different wave-bands, broad-band spectral indices from radio to X-ray (αrx\alpha_{\rm rx}) and peak frequencies (νp\nu_p). Our results are as follows: (i) there is a positive correlation between radio luminosity LrL_{\rm r} and αrx\alpha_{\rm rx} and a negative correlation between LrL_{\rm r} and νp\nu_p. High-energy peak BL Lacs (HBLs) and low-energy peak BL Lacs (LBLs) can be distinguished very well, the dividing lines are probably those of logLr=43.25\log {L_{\rm r}}=43.25 (erg/sec) and αrx>\alpha_{\rm rx}>(or \leq )0.75 for LrL_{\rm r} - αrx\alpha_{\rm rx} plot and those of logLr43.25\log {L_{\rm r}}\leq 43.25 (erg/sec) and logνp>14.7\log {\nu_p}>14.7 for the LrL_{\rm r} - νp\nu_p plot; (ii) there is a weak positive correlation between optical luminosity LoL_o and αrx\alpha_{\rm rx} and a negatively weak correlation between LoL_{\rm o} and νp\nu_p; (iii) there is no correlation between X-ray luminosity LXL_X and αrx\alpha_{\rm rx} or between LXL_X and νp\nu_p. From our analysis, we find that synchrotron radiation is the main X-ray radiation mechanism for HBLs while inverse Compton scattering for LBLs.Comment: 9 pages, 3 figures. Submitted to A&

    Recovery of the old nova V840 Ophiuchi: A carbon rich system

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    We present optical spectroscopy and multi colour photometry of the old nova V840 Oph. We rediscovered the nova based on its position in the colour--colour diagrams. It stands out as a very blue object with an additional red component. We present the first optical spectroscopy of this candidate and confirm its nova character. Furthermore, V840\,Oph has been found as one of very few cataclysmic variables showing C IV emission at lambda = 580/1 nm. From the analysis of the carbon lines it seems probable that V840 Oph contains actually a carbon-rich secondary star. So far, only the nova-like QU Car has been known to have such a companion. We furthermore find spectroscopic evidence that V840 Oph has a hot, dense accretion disc or stream and is probably a magnetic system.Comment: 7 pages, 6 figures, accepted by A&

    Handbook on Sensitive Practice for Health Care Practitioners: Lessons from Adult Survivors of Childhood Sexual Abuse

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    This handbook is the culmination of a multiphase, multidisciplinary research project that used grounded theory and participatory action research to illuminate ways that healthcare providers can work sensitively (in a trauma-informed way) with adult survivors of childhood sexual abuse. The research identified nine Principles of Sensitive Practice: respect, rapport, taking time, sharing information and control, respecting boundaries, fostering mutual learning, understanding non-linear healing and demonstrating an understanding of trauma to patients. Specific guidelines were developed for a wide variety of issues pertinent to clinical practice such as, removal of clothing, touch, responding to disclosures of abuse, managing triggers among others. The methodology included interviews with women and men adult survivors of childhood sexual abuse from across Canada about how healthcare practitioners can be sensitive to their needs as survivors. It also included learnings from group meetings where survivors and healthcare practitioners discussed together ways healthcare practice could better respond to the needs of survivors. Written feedback received from physicians, nurses, dentists and dental hygienists, physical and occupational therapists, massage therapists, chiropractors, kinesiologists, professional regulators, mental health professionals and survivors from across Canada ensured that suggestions for clinical practice reflected both survivor needs and the realities of clinical practice. We concluded that because healthcare providers are not always aware that they are working with individuals who have experienced childhood trauma, clinicians should apply these principles and guidelines universally in order to work in a trauma-informed manner with all patients

    Baseline elevation and reduction in cardiac electrical instability assessed by quantitative T-wave alternans in patients with drug-resistant epilepsy treated with vagus nerve stimulation in the AspireSR E-36 trial

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    Objective: Reports of cardiac arrhythmias and cardiac pathology at postmortem examination of patients with epilepsy suggest a possible cardiac component of risk for sudden unexpected death in epilepsy (SUDEP). T-wave alternans (TWA) is an established marker of cardiac electrical instability and risk for sudden death in patients with cardiovascular disease. We determined the TWA level before vagus nerve stimulation (VNS) system implantation and subsequently the effect of VNS on TWA in patients with drug-resistant epilepsy. Methods: Patients (n = 28) from the Seizure Detection and Automatic Magnet Mode Performance Study (E-36), a clinical trial of the AspireSR (R) VNS Therapy System (R) (NCT01325623), were monitored with ambulatory electrocardiograms (ECGs) similar to 2 weeks before de novo VNS system implantation and following 2- to 4-week VNS titration during a protocol-specified 3- to 5-day epilepsy monitoring unit stay with concurrent EEG/ECG recordings. The TWA level was assessed interictally by the Modified Moving Average (MMA) method. Results: At preimplantation baseline, TWA was elevated above the 47-mu V abnormality cutpoint in 23 (82%) patients with drug-resistant epilepsy. In 16 (70%) patients, TWA level was reduced during VNS treatment to <47 mu V, thereby converting positive TWA test results to negative. Peak TWA level in all 28 patients improved (group mean, 43%, from 72 +/- 4.3 to 41 +/- 2.3 mu V; p < 0.0001). Vagus nerve stimulation was not associated with reduced heart rate (77 +/- 1.4 to 75 +/- 1.4 beats/min; p = 0.18). Heart rate variability was unchanged. Significance: These findings suggest significant interictal cardiac electrical instability in this population of patients with drug-resistant epilepsy and suggest that VNS may be a novel approach to reducing risk

    Trade in the balance: reconciling trade and climate policy: report of the Working Group on Trade, Investment, and Climate Policy

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    This repository item contains a report published by the Working Group on Trade, Investment, and Climate Policy at The Frederick S. Pardee Center for the Study of the Longer-Range Future at Boston University, and the Global Economic Governance Initiative at Boston University.This report outlines the general tensions between the trade and investment regime and climate policy, and outlines a framework toward making trade and investment rules more climate friendly. Members of the working group have contributed short pieces addressing a range of issues related to the intersection of trade and climate policy. The first two are by natural scientists. Anthony Janetos discusses the need to address the effects of international trade on efforts to limit the increase in global annual temperature to no more than 2oC over preindustrial levels. James J. Corbett examines the failure of the Trans Pacific Partnership (TPP) and the Transatlantic Trade and Investment Partnership (TTIP) to adequately address the environmental implications of shipping and maritime transport. The next two pieces are by economists who examine economic aspects of the trade-climate linkage. Irene Monasterolo and Marco Raberto discuss the potential impacts of including fossil fuel subsidies reduction under the TTIP. Frank Ackerman explores the economic costs of efforts to promote convergence of regulatory standards between the United States and the European Union under the TTIP. The following two contributions are by legal scholars. Brooke Güven and Lise Johnson explore the potential for international investment treaties to redirect investment flows to support climate change mitigation and adaptation, particularly with regard to China and India. Matt Porterfield provides an overview of the ways in which both existing and proposed trade and investment agreements could have either “climate positive” or “climate negative” effects on mitigation policies. The final article is by Tao Hu, a former WTO trade and environment expert advisor for China and currently at the World Wildlife Fund, arguing that the definition of environmental goods and services’ under the WTO negotiations needs to be expanded to better incorporate climate change
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