5,157 research outputs found

    Non-alloy Mg anode for Ni-MH batteries: Multiple approaches towards a stable cycling performance

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    Mg 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

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    OBJECTIVE: 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

    Pembingkaian peristiwa teror di Jalan Mh Thamrin Jakarta pada harian kompas, Media Indonesia, Republika dan koran sindo: Sebuah analisis framing

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    Terorisme menjadi suatu hal yang sudah dikenal masyarakat setelah banyak terjadinya peristiwa bom di beberapa tempat di Indonesia. Namun, ditemukan strategi yang berbeda pada peristiwa teror di Jalan MH Thamrin pada 14 Januari 2016. Selain bom bunuh diri, pelaku teror menyerang dengan aksi tembak menembak dengan pihak keamanan. Skripsi ini berjudul “Pembingkaian Peristiwa Teror di Jalan MH Thamrin Pada Harian Kompas, Media Indonesia, Republika dan Koran Sindo: Sebuah Analisis Framing Zhongdang Pan dan Gerald M.Kosicki.” Tujuannya untuk mengetahui bagaimana keempat media tersebut mengonstruksi peristiwa teror di Jalan MH Thamrin dalam pemberitaan mereka. Pendekatan penelitian yang digunakan adalah kualitatif dengan paradigma konstruktivis. Untuk menganalisis data, penulis menggunakan analisis framing model Zhongdang Pan dan Gerald M.Kosicki. Model ini akan melihat suatu teks berita dari empat elemen, yaitu sintaksis, skrip, tematik dan retoris. Dari hasil penelitian diperoleh bahwa keempat media nasional yaitu Kompas, Media Indonesia, Republika dan Sindo mengecam dan mengutuk keras aksi terorisme serta mengajak masyarakat Indonesia untuk bangkit bersama-sama melawan terorisme
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