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  • 1
    Language: English
    In: Science (New York, N.Y.), 26 January 2018, Vol.359(6374), pp.388-389
    Description: Perovskite solar cells (PSCs) have reached peak performances rivaling those of established technologies that have been painstakingly optimized for decades (1–3). Their high power outputs and low production costs have attracted serious industry attention from established companies and have led to the founding of multiple start-up companies (4). However, for commercial products, long-term stability is crucial. Thus, for perovskites to succeed, an informed discussion on a standard for stability data is required.
    Keywords: Photovoltaic Cells ; Solar Cells ; Stability ; Manufacturing Engineering ; Production Costs ; Production Costs ; Industrial Engineering ; Photovoltaic Cells ; Perovskites ; Solar Cells;
    ISSN: 00368075
    E-ISSN: 1095-9203
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  • 2
    In: Journal of the American Geriatrics Society, January 2018, Vol.66(1), pp.18-18
    Description: This editorial comments on the articles by and .
    Keywords: Medicine;
    ISSN: 0002-8614
    E-ISSN: 1532-5415
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  • 3
    Language: English
    In: Atmospheric Environment, Jan, 2012, Vol.46, p.256(8)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.atmosenv.2011.09.074 Byline: N.A. Saliba, Ashraf Chamseddine Abstract: Due to the implications caused by mineral dust and sea-salt heterogeneous reactions with SO.sub.2, NO.sub.x and NH.sub.3 derivatives, this study aims to understand the interaction between gaseous and particulate phases; PM10 and PM2.5, in dust-rich and dust-poor environments. During dust outbreaks, the increase in PM10 and PM2.5 mass concentrations by 80 and 75%, respectively, was accompanied with approximately 30% decrease in water soluble inorganic ions. However, nitrate ion concentration, which increased by 36% during dust-rich episodes, was correlated with a 96% increase in gaseous HONO concentration. This implies a significant impact of dust storms on the tropospheric NO.sub.2 to HONO conversion and consequently the formation of nitrate in PMs. Products of the reaction between HONO and mineral dust render atmospheric aerosols more soluble and consequently higher nitrogen deposition fluxes were calculated. Author Affiliation: Chemistry Department, American University of Beirut, P.O.Box 11-0236, Riad El-Solh, Beirut 1107 2020, Lebanon Article History: Received 23 May 2011; Revised 27 September 2011; Accepted 28 September 2011
    Keywords: Atmospheric Physics -- Environmental Aspects ; Pollutants -- Environmental Aspects ; Storms -- Environmental Aspects ; Air Pollution -- Environmental Aspects
    ISSN: 1352-2310
    Source: Cengage Learning, Inc.
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  • 4
    In: The New England Journal of Medicine, 2011, Vol.365(24), pp.2296-2304
    Description: A 59-year-old man presents with a recurrent episode of symptomatic atrial fibrillation despite attempts to maintain sinus rhythm with antiarrhythmic drugs. Catheter ablation can be effective in such patients, but more than one procedure may be necessary. ForewordThis Journal feature begins with a case vignette that includes a therapeutic recommendation. A discussion of the clinical problem and the mechanism of benefit of this form of therapy follows. Major clinical studies, the clinical use of this therapy, and potential adverse effects are reviewed. Relevant formal guidelines, if they exist, are presented. The article ends with the authors' clinical recommendations.StageA 59-year-old man with hypertension and diabetes presents with palpitations, fatigue, and shortness of breath and is found to be in atrial fibrillation. He has had recurring episodes of atrial fibrillation over the previous 5 years, typically with similar symptoms, and has received warfarin for stroke prevention. He has required direct-current cardioversion to restore sinus rhythm on two occasions despite treatment with flecainide and subsequently with dofetilide. The use of amiodarone resulted in hyperthyroidism. After undergoing cardioversion, he is referred to a cardiac electrophysiologist, who recommends catheter ablation. The Clinical Problem Atrial fibrillation affects up to 5 million people . . .
    Keywords: Medicine;
    ISSN: 0028-4793
    E-ISSN: 1533-4406
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  • 5
    Language: English
    In: Medicine and Science in Sports and Exercise, May, 2014, Vol.46(5)
    Description: The article reports on a study to evaluate whether differences exist in the Brain Acoustic Monitor (BAM) measures between healthy (H) and concussed (C) athletes 48-72 hours post-injury. The results indicate that BAM measures obtained from concussed athletes 48-72 hours post-injury did not differ from healthy athletes.
    Keywords: Athletes -- Injuries ; Brain Injuries -- Research ; Brain Injuries -- Risk Factors
    ISSN: 0195-9131
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  • 6
    Language: English
    In: Women's Studies International Forum, July 2012, Vol.35(4), pp.203-213
    Description: Adopting a qualitative method, the study examines the everyday tactics that sixty Palestinian women from Jaffa employ in order to cope with various strategies of power – gender, cultural, national and global – that limit their everyday spatial practices. Based on the narratives of these women, the study suggests to distinguish between pro-active and non-active tactics which create or diminish the construction of spaces of belonging on the base of daily negotiations, and ways of maneuvering that Palestinian women use against these strategies of power. Pro-active tactics create alternative spaces; enable the manipulation of social and cultural codes; and create the home as a space of independence. Non-active tactics work against ethnic allocation; discriminatory Palestinian and Jewish development and Islamization of space. The study considers spaces of belonging, which are created by daily negotiations and tactics, to be the “third space”, not only the space occupied by oppressed and marginalized groups, but also a space of opportunities that affords these women the possibility of making changes in their spatial practices. ► We interviewed sixty Palestinian women of three age groups living in Jaffa. ► We examine the everyday tactics that women employ to cope with various strategies. ► Spaces of belonging are consist of pro-active and non-active tactics. ► Sense of belonging is created by the daily negotiations and successful tactics. ► They create “third space”, where they can have spatial practices changing.
    Keywords: Women'S Studies
    ISSN: 0277-5395
    E-ISSN: 1879-243X
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  • 7
    Language: English
    In: Osteoporosis International, April, 2013, Vol.24(4), p.1447(8)
    Description: Byline: W. Saliba (1,2), O. Barnett-Griness (1), G. Rennert (1,3) Keywords: 25(OH)D; BMI; Cholecalciferol; Obesity; Response to treatment; Vitamin D Abstract: Summary This study examines the relationship between obesity and the increase in serum 25(OH)D levels in response to vitamin D supplementation among adults with baseline serum 25(OH)D levels 〈50 nmol/L. This study revealed that the increase in serum 25(OH)D in response to vitamin D supplementation was higher in lean subjects as compared to obese subjects. Introduction Serum 25(OH)D is lower among obese than non-obese. This study examines the relationship between obesity and the increase in serum 25(OH)D in response to vitamin D supplementation in a large sample of adults with baseline serum 25(OH)D 〈50 nmol/L, relatively long average treatment duration and large average daily cholecalciferol. Methods The computerized database of the Clalit Health Services, which the largest nonprofit health maintenance organization in Israel, was retrospectively searched for all subjects aged aY=20 years who performed serum 25(OH)D test in 2011. Subjects with more than one test at different occasions in 2011 were identified and were included if the result of the first test was 〈50 nmol/L, and were treated with cholecalciferol between the first and the last test in 2011 (n=16,540 subjects). Results The mean increase in serum 25(OH)D level after treatment was 28.7 (95 % confidence interval (CI), 28.0--29.4)nmol/L, 23.6 (23.0--24.2)nmol/L, and 20.1 (19.6--20.6)nmol/L in subject with BMI of 〈25, 25--29.9, and aY=30 kg/m.sup.2, respectively (P〈0.001). The results were similar after adjustment for the potential confounders. Similarly, the proportion of subjects who achieved serum 25(OH)DaY=50 nmol/L after treatment was inversely associated with BMI 65.1, 58.3, and 49.1 % for BMI of 〈25, 25--29.9, andaY=30 kg/m.sup.2, respectively. Compared to BMI of aY=30 kg/m.sup.2, the adjusted odds ratio for achieving levels of aY=50 nmol/L were 2.12 (95 % CI, 1.94--2.31) and 1.42 (1.31--1.54) for BMI of 〈25 kg/m.sup.2, and BMI of 25--29.9 kg/m.sup.2, respectively. Conclusions BMI is inversely associated with the increase in serum 25(OH)D levels in response to vitamin D supplementation. Author Affiliation: (1) Department of Community Medicine and Epidemiology, Carmel Medical Center, Clalit Health Services, and Bruce Rappaport Faculty of Medicine, Technion--Israel Institute of Technology, 7 Michal St, Haifa, 34362, Israel (2) Internal Medicine C, Ha'emek Medical Center, Afula, Israel (3) Department of Epidemiology and Disease Prevention, Clalit Health Services Headquarters, Office of the Chief Physician, Tel Aviv, Israel Article History: Registration Date: 23/08/2012 Received Date: 25/03/2012 Accepted Date: 30/07/2012 Online Date: 07/09/2012
    Keywords: Body Mass Index -- Physiological Aspects ; Body Mass Index -- Genetic Aspects ; Body Mass Index -- Research ; Obesity -- Complications And Side Effects ; Obesity -- Research ; Vitamin D -- Health Aspects ; Vitamin D -- Research
    ISSN: 0937-941X
    Source: Cengage Learning, Inc.
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  • 8
    In: Acta Paediatrica, February 2015, Vol.104(2), pp.114-115
    Description: To purchase or authenticate to the full-text of this article, please visit this link: http://onlinelibrary.wiley.com/doi/10.1111/apa.12891/abstract Byline: Elie Saliba ***** No abstract is available for this article. *****
    Keywords: Hypothermia – Health Aspects;
    ISSN: 0803-5253
    E-ISSN: 1651-2227
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  • 9
    Language: English
    In: Science (New York, N.Y.), 26 October 2018, Vol.362(6413), pp.449-453
    Description: Currently, perovskite solar cells (PSCs) with high performances greater than 20% contain bromine (Br), causing a suboptimal bandgap, and the thermally unstable methylammonium (MA) molecule. Avoiding Br and especially MA can therefore result in more optimal bandgaps and stable perovskites. We show that inorganic cation tuning, using rubidium and cesium, enables highly crystalline formamidinium-based perovskites without Br or MA. On a conventional, planar device architecture, using polymeric interlayers at the electron- and hole-transporting interface, we demonstrate an efficiency of 20.35% (stabilized), one of the highest for MA-free perovskites, with a drastically improved stability reached without the stabilizing influence of mesoporous interlayers. The perovskite is not heated beyond 100°C. Going MA-free is a new direction for perovskites that are inherently stable and compatible with tandems or flexible substrates, which are the main routes commercializing PSCs.
    Keywords: Cations ; Iodides ; Thermal Stability ; Rubidium ; Cesium ; Interlayers ; Substrates ; Cations ; Energy Gap ; Bromine ; Rubidium ; Solar Cells ; Cesium ; Cesium ; Photovoltaic Cells ; Solar Cells ; Cations ; Rubidium ; Photovoltaic Cells ; Bromine ; Perovskites ; Computer Architecture;
    ISSN: 00368075
    E-ISSN: 1095-9203
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  • 10
    Language: English
    In: British Journal of Surgery, 05/2011, Vol.98(5), pp.632-632
    Description: BACKGROUNDExtracorporeal liver support (ELS) systems offer the potential to prolong survival in acute and acute-on-chronic liver failure. However, the literature has been unclear on their specific role and influence on mortality. This meta-analysis aimed to test the hypothesis that ELS improves survival in acute and acute-on-chronic liver failure. METHODSClinical trials citing MeSH terms 'liver failure' and 'liver, artificial' were identified by searching MEDLINE, Embase and the Cochrane registry of randomized controlled trials (RCTs) between January 1995 and January 2010. Only RCTs comparing ELS with standard medical therapy in acute or acute-on-chronic liver failure were included. A predefined data collection pro forma was used and study quality assessed according to Consolidated Standards of Reporting Trials (CONSORT) criteria. Risk ratio was used as the effect size measure according to a random-effects model. RESULTSThe search strategy revealed 74 clinical studies including 17 RCTs, five case-control studies and 52 cohort studies. Eight RCTs were suitable for inclusion, three addressing acute liver failure (198 participants) and five acute-on-chronic liver failure (157 participants). The mean CONSORT score was 14 (range 11-20). Overall ELS therapy significantly improved survival in acute liver failure (risk ratio 0·70; P = 0·05). The number needed to treat to prevent one death in acute liver failure was eight. No significant survival benefit was demonstrated in acute-on-chronic liver failure (risk ratio 0·87; P = 0·37). CONCLUSIONELS systems appear to improve survival in acute liver failure. There is, however, no evidence that they improve survival in acute-on-chronic liver failure.
    Keywords: End Stage Liver Disease–Mortality ; Epidemiologic Methods–Therapy ; Humans–Mortality ; Liver Failure, Acute–Therapy ; Liver, Artificial–Statistics & Numerical Data ; Randomized Controlled Trials As Topic–Statistics & Numerical Data ; Treatment Outcome–Statistics & Numerical Data ; Abridged;
    ISSN: British Journal of Surgery
    E-ISSN: 00071323
    E-ISSN: 13652168
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