2,438 research outputs found
Non-alloy Mg anode for Ni-MH batteries: Multiple approaches towards a stable cycling performance
No full textMg attracts much research interest as anode material for Ni-MH batteries thanks to its lightweight, cost-effectiveness and high theoretical capacity (2200 mA h g−1). However, its practical application is tremendously challenged by the poor hydrogen sorption kinetics, passivation from aggressive aqueous electrolytes, and insulating nature of MgH2. Mg-based alloys exhibit enhanced hydrogen sorption kinetics and electrical conductivity, but significant amount of costly transition metal elements are required. In this work, we have, for the first time, utilized non-alloyed but catalyzed Mg as anode for Ni-MH batteries. 5 mol.% TiF3 was added to nanosized Mg for accelerating the hydrogen sorption kinetics. Several strategies for preventing the problematic passivation of Mg have been studied, including protective encapsulation of the electrode and utilizing room-temperature/high-temperature ionic liquids and an alkaline polymer membrane as working electrolyte. Promising electrochemical performance has been achieved in this Mg–TiF3 composite anode based Ni-MH batteries with room for further improvements.</p
Assessing risk of self-harm in acute paediatric settings: A multicentre exploratory evaluation of the CYP-MH SAPhE instrument
No full textOBJECTIVE: To psychometrically assess the Children and Young People-Mental Health Self-harm Assessment in Paediatric healthcare Environments (CYP-MH SAPhE) instrument for the identification of immediate risk of self-harm in CYP, aged 10-19 years, in acute paediatric wards or emergency departments., DESIGN: The CYP-MH SAPhE Instrument was developed through a robust scoping review and Delphi consensus with 30 clinicians/topic experts. To evaluate the psychometric properties, a multicentre exploratory study was conducted., SETTING: Three acute hospitals in the UK., PARTICIPANTS: 163 CYP presenting at acute hospital settings with primary mental health (cases) or physical health (non-cases) conditions., PRIMARY AND SECONDARY OUTCOME MEASURES: Psychometric properties of the CYP-MH SAPhE instrument were evaluated through Principle Axis Factoring (PAF) with Oblimin (Kaiser normalisation) alongside measures of internal consistency (Cronbach's alpha), convergent, discriminant and face validity., RESULTS: PAF of the dichotomous items (n=9) loaded onto three factors (1) behaviours and intentions; (2) suicidality and (3) self-harm. Factors 1 (Cronbach's alpha=0.960) and 3 (Cronbach's alpha=1) had high internal consistency. There was: good level of agreement between raters (kappa=0.65); a moderately positive correlation between the CYP-MH SAPhE instrument and the Columbia-Suicide Severity Rating Scale; and discrimination between cases and non-cases across the three factors (factor 1: m=88 vs 70; factor 2: m=102 vs 70; factor 3: m=104 vs 68). Assessment of face validity resulted in six items being removed, culminating in an eight question, rapid assessment instrument., CONCLUSIONS: The results support the CYP-MH SAPhE Tool as a potentially reliable and valid instrument to identify immediate risk of self-harm in CYP presenting to acute paediatric healthcare environments, which is a burgeoning and significant global health issue. Copyright © Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.https://dx.doi.org/10.1136/bmjopen-2020-04376
Pilot wellbeing & work related stress (WRS)
No full textThis paper presents the preliminary findings of an anonymous web-based survey addresing pilot work related stress (WRS) and wellbeing. The initial analysis indicates that pilots are under stress and experiencing wellbeing problems. Specific features of the job can result in wellbeing problems, spanning the three pillars of wellbeing. Critically, sources of WRS can increase a pilot’s risk in terms of developing a mental health (MH) issue. Further, sources of WRS can impact on performance and safety. Considerable barriers still remain in relation to reporting MH issues at work. Coping mechanisms addressing sleep/fatigue, diet, exercise and communication/reporting, enable some pilots to thrive in an environment that has negative impacts for others. The vast majority of pilots indicated that issues pertaining to WRS and wellbeing are not being adequately managed in terms of airline safety management systems/processes. Potentially, airline interventions might focus on enhancing existing safety management system processes/technology to address risks associated with WRS and wellbeing, training pilots, and introducing new wellbeing briefing/reporting systems. Further, new digital tools might be advanced to support pilot self management of WRS/wellbeing and risk identification, both inside and outside work
The times; or, the age of ruin. A poem. [electronic resource] : By the author of "A poetical and complimentary epistle to R. Brothers the prophet, and N. B. Halhed, Esq;" &c.
No full textPublication date from MH-H.Electronic reproduction.English Short Title Catalog,Reproduction of original from Harvard University Houghton Library
[The] lady's watch. [electronic resource] : By the author of The prude.
No full textVerse - "A fair one sought the silent poplar shade".'The prude, a tale.' was first published in Dublin in 1722.MH-H copy may be cropped at head, affecting first word of titleFoxon,Electronic reproduction.English Short Title Catalog,Reproduction of original from Harvard University Houghton Library
Between Mother and Son: Preparation of the assambly MH+-
No full textEl presente informe recopila los detalles y el proceso creativo de la obra de danza MH+-, donde se reunieron los saberes académicos en términos prácticos, teóricos y experienciales, apropiados por el estudiante y autor de la obra en mención y este texto, Ricardo Nieto Ortíz. En esta obra se tomó como inspiración temática la relación personal de dicho estudiante y su madre, desde el momento en que este se identificó frente a ella como un hombre homosexual. El proceso de creación se llevó a cabo a través de un laboratorio de investigación creación con seis intérpretes creadores, incluido Ricardo Nieto, durante seis meses, con cuatro etapas de desarrollo utilizando herramientas como la improvisación, la creación de personajes y la ejercitación de los imaginarios que nutren los procesos creativos de los intérpretes.This report compiles the details and the creative process of the dance work MH+-, where the academic knowledge in practical, theoretical and experiential terms was gathered, appropriated by the student and author of the work in question and this text, Ricardo Nieto Ortiz. In this work, the personal relationship of this student and his mother was taken as thematic inspiration, from the moment he identified himself in front of her as a homosexual man. The creation process was carried out through a creation research laboratory with six creative interpreters, including Ricardo Nieto, for six months, with four stages of development using tools such as improvisation, the creation of characters and the exercise of the imaginaries that nourish the creative processes of the performers
Lo español en la literatura norteamericana
No full textDibujos de William Cullen Bryant, Francis Bret Harte, Hnery Wadsworth Longfellow, James Russell Lowell, William Hickling Prescott para ilustrar un artículo de Carlos ClaveríaPublicaciones: Signatura MH-51/42 correspondiente a la caja y sobre de la Colección Mundo HispánicoPublicaciones: Signatura MH-67/25 correspondiente a la caja y sobre de la Colección Mundo HispánicoPublicaciones: Signatura MH-71/65 correspondiente a la caja y sobre de la Colección Mundo HispánicoPublicaciones: Signatura MH-72/30 correspondiente a la caja y sobre de la Colección Mundo HispánicoPublicaciones: Signatura MH-84/68 correspondiente a la caja y sobre de la Colección Mundo HispánicoTítulo tomado de la revistaFirmados por AcquaroniPublicado en Mundo Hispánico, n. 112 (año 1957, julio), p. 18-19Dibujos a tinta negra sobre papel y papel cebollaPautas para impresión a lápiz roj
Systematic reviews with language restrictions and no author contact have lower overall credibility: a methodology study
No full textZhen Wang,1–3 Juan P Brito,4 Apostolos Tsapas,5 Marcio L Griebeler,4 Fares Alahdab,1,3 Mohammad Hassan Murad,1,3,61Robert D and Patricia E Kern Center for the Science of Health Care Delivery, 2Division of Health Care Policy and Research, Department of Health Sciences Research, 3Knowledge and Evaluation Research Unit, 4Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic, Rochester, MN, USA; 5Aristotle University of Thessaloniki, Thessaloniki, Greece; 6Division of Preventive, Occupational and Aerospace Medicine, Mayo Clinic, Rochester, MN, USABackground: High-quality systematic reviews (SRs) require rigorous approaches to identify, appraise, select, and synthesize research evidence relevant to a specific question. In this study, we evaluated the association between two steps in the conduct of an SR – restricting the search to English, and author contact for missing data – and the overall credibility of a SR.Methods: All SRs cited by the Endocrine Society's Clinical Practice Guidelines published from October 2006 through January 2012 were included. The main outcome was the overall A Measurement Tool to Assess Systematic Reviews (AMSTAR) score, as a surrogate of SR credibility. Nonparametric Kruskal–Wallis tests and multivariable linear regression models were used to investigate the association between language restriction, author contact for missing data, and the overall AMSTAR score.Results: In all, 69 SRs were included in the analysis. Only 31 SRs (45%) reported searching non-English literature, with an average AMSTAR score of 7.90 (standard deviation [SD] =1.64). SRs that reported language restriction received significantly lower AMSTAR scores (mean =5.25, SD =2.32) (P<0.001). Only 30 SRs (43%) reported contacting authors for missing data, and these received, on average, 2.59 more AMSTAR points (SD =1.95) than those who did not (P<0.001). In multivariable analyses, AMSTAR score was significantly correlated with language restriction (beta =-1.31, 95% confidence interval [CI]: -2.62, -0.01, P=0.05) and author contact for missing data (beta =2.16, 95% CI: 0.91, 3.41, P=0.001). However, after adjusting for compliance with reporting guidelines, language restriction was no longer significantly associated with the AMSTAR score.Conclusion: Fewer than half of the SRs conducted to support the clinical practice guidelines we examined reported contacting study authors or searched non–English literature. SRs that did not conduct these two steps had lower quality scores, suggesting the importance of these two steps for overall SR credibility.Keywords: evidence-based medicine, research design, validity, quality of evidenc
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