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Uniaxial Strain-Controlled Ferroelastic Domain Evolution in BiFeO<sub>3</sub>
Alsubaie, Abdullah,Sharma, Pankaj,Lee, Jin Hong,Kim, Jeong Yong,Yang, Chan-Ho,Seidel, Jan American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.14
<P>We investigate the effect of variable uniaxial tensile strain on the evolution of 71° ferroelastic domains in (001)-oriented epitaxial BiFeO<SUB>3</SUB> (BFO) thin films using piezoresponse force microscopy (PFM). For this purpose, a newly designed bending stage has been employed, which allows tensile bending as wells as in situ PFM characterization. In situ PFM imaging reveals polarization-strain correlations at the nanoscale. Specifically, ferroelastic domains with in-plane polarization along the direction of applied tensile strain expand, whereas the adjoining domains with orthogonal in-plane polarization contract. The switching is mediated by significant domain wall roughening and opposite displacement of the successive walls. Further, the domains with long-range order are more susceptible to an applied external mechanical stimulus compared to the domains, which exhibit short-range periodicity. In addition, the imprint state of film reverses direction under applied tensile strain. Finally, the strain-induced changes in the domain structure and wall motion are fully reversible and revert to their as-grown state upon release of the applied stress. The strain-induced non-180° polarization rotation constitutes a route to control connected functionalities, such as magnetism, via coupled in-plane rotation of the magnetic plane in multiferroic BFO thin films.</P> [FIG OMISSION]</BR>
Sarah S. Alsubaie,Mazin A. Barry 대한신장학회 2019 Kidney Research and Clinical Practice Vol.38 No.4
Recurrent urinary tract infections (UTIs) in children are associated with development of pyelonephritis and renal scarring. Traditionally, continuous antibiotic prophylaxis (CAP) has been used to prevent recurrent UTI. Recent studies have challenged the efficacy of CAP for preventing renal scarring and have raised concerns about inducing bacterial resistance. This review focuses on studies published between January 2000 and April 2019 and evaluates the use of CAP in children for avoiding recurrent UTIs and renal scarring. A systematic literature search was carried out using the following search terms and related medical subject headings in the MEDLINE electronic database: ‘urinary tract infection’, ‘antimicrobial/antibiotic prophylaxis’, and ‘children/pediatrics’. Randomized clinical trials (RCTs), original research articles, guidelines, systematic reviews, and meta-analyses describing antibiotic prophylaxis for UTIs were included. A total of 34 RCTs, 9 systematic reviews, and 3 guidelines describing antibiotic prophylaxis were included in this review. The efficacy of CAP for preventing recurrent UTI remains unclear due to non-generalizability of results obtained from suboptimally designed clinical trials. CAP has not been proven as beneficial for preventing new renal scarring in children. Additionally, CAP is associated with increased risk of multidrug resistant infections in children. No conclusive evidence can be drawn from the available clinical data to support routine use of CAP for prevention of renal scarring. Accumulation of evidence from additional well designed studies may result in different conclusions in the future. It is important to identify specific risks for recurrent UTI and ensuing renal injury to ensure more judicious use of CAP.
Reviewing And Analysis of The Deadlock Handling Methods
El-Sharawy, Enas E.,Ahmed, Thowiba E,Alshammari, Reem H,Alsubaie, Wafaa,Almuhanna, Norah,Alqahtani, Asma International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.10
Objectives: The primary goal of this article is to compare the multiple algorithms used for deadlock handling methods and then outline the common method in deadlock handling methods. Methods: The article methodology begins with introducing a literature review studying different algorithms used in deadlock detection and many algorithms for deadlocks prevented, recovered, and avoided. Discussion and analysis of the literature review were done to classify and compare the studied algorithms. Findings: The results showed that the deadlock detection method solves the deadlock. As soon as the real-time deadlock detection algorithm is identified and indicated, it performs better than the non-real-time deadlock detection algorithm. Our novelty the statistics that we get from the percentages of reviewing outcomes that show the most effective rate of 47% is in deadlock prevention. Then deadlock detection and recovery with 28% finally, a rate of 25% for deadlock avoidance.
Zanyu Huang,Qiuyue Han,Adil Hussein Mohammed,Arsalan Mahmoodzadeh,Nejib Ghazouani,Shtwai Alsubai,Abed Alanazi,Abdullah Alqahtani Techno-Press 2023 Advances in nano research Vol.15 No.6
This study aims to examine four machine learning (ML)-based models for their potential to estimate the splitting tensile strength (STS) of manufactured sand concrete (MSC). The ML models were trained and tested based on 310 experimental data points. Stone nanopowder content (SNPC), curing age (CA), and water-to-cement (W/C) ratio were also studied for their impacts on the STS of MSC. According to the results, the support vector regression (SVR) model had the highest correlation with experimental data. Still, all of the optimized ML models showed promise in estimating the STS of MSC. Both ML and laboratory results showed that MSC with 10% SNPC improved the STS of MSC.
Flux and color variations of the doubly imaged quasar UM673
Ricci, D.,Elyiv, A.,Finet, F.,Wertz, O.,Alsubai, K.,Anguita, T.,Bozza, V.,Browne, P.,Burgdorf, M.,Calchi Novati, S.,Dodds, P.,Dominik, M.,Dreizler, S.,Gerner, T.,Glitrup, M.,Grundahl, F.,Hardis, S.,Ha EDP Sciences 2013 Astronomy and astrophysics Vol.551 No.-
RED NOISE VERSUS PLANETARY INTERPRETATIONS IN THE MICROLENSING EVENT OGLE-2013-BLG-446
Bachelet, E.,Bramich, D. M.,Han, C.,Greenhill, J.,Street, R. A.,Gould, A.,D’Ago, G.,AlSubai, K.,Dominik, M.,Jaimes, R. Figuera,Horne, K.,Hundertmark, M.,Kains, N.,Snodgrass, C.,Steele, I. A.,Tsapras, IOP Publishing 2015 The Astrophysical journal Vol.812 No.2
<P>For all exoplanet candidates, the reliability of a claimed detection needs to be assessed through a careful study of systematic errors in the data to minimize the false positives rate. We present a method to investigate such systematics in microlensing data sets using the microlensing event OGLE-2013-BLG-0446 as a case study. The event was observed from multiple sites around the world and its high magnification (A(max) similar to 3000) allowed us to investigate the effects of terrestrial and annual parallax. Real-time modeling of the event while it was still ongoing suggested the presence of an extremely low-mass companion (similar to 3M(circle plus)) to the lensing star, leading to substantial follow-up coverage of the light curve. We test and compare different models for the light curve and conclude that the data do not favor the planetary interpretation when systematic errors are taken into account.</P>