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Gore, Shyam K.,Mane, Rajaram S.,Naushad, Mu.,Jadhav, Santosh S.,Zate, Manohar K.,Alothman, Z. A.,Hui, Biz K. N. The Royal Society of Chemistry 2015 Dalton Transactions Vol.44 No.14
<P>The influence of Bi<SUP>3+</SUP>-doping on the magnetic and Mössbauer properties of cobalt ferrite (CoFe<SUB>2</SUB>O<SUB>4</SUB>), wherein the Fe<SUP>3+</SUP> ions are replaced by the Bi<SUP>3+</SUP> ions to form CoBi<SUB><I>x</I></SUB>Fe<SUB>2−<I>x</I></SUB>O<SUB>4</SUB> ferrites, where <I>x</I> = 0.0, 0.05, 0.1, 0.15 or 0.2, has been investigated. The structural and morphological properties of undoped and doped ferrites, synthesized chemically through a self-igniting sol–gel method, are initially screened using X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy measurements. The changes in magnetic moment of ions, their coupling with neighboring ions and cation exchange interactions are confirmed from the Mössbauer spectroscopy analysis. The effect of Bi<SUP>3+</SUP>-doping on the magnetic properties of CoFe<SUB>2</SUB>O<SUB>4</SUB> ferrite is examined from the vibrating sample magnetometry spectra. Saturation magnetization and coercivity values are increased initially and then decreased, as result of Bi<SUP>3+</SUP>-doping. The obtained results with improved saturation magnetization (from 26.36 to 44.96 emu g<SUP>−1</SUP>), coercivity (from 1457 to 1863 Oe) and remanence magnetization (from 14.48 to 24.63 emu g<SUP>−1</SUP>) on 0.1–0.15 mol Bi<SUP>3+</SUP>-doping of CoBi<SUB><I>x</I></SUB>Fe<SUB>2−<I>x</I></SUB>O<SUB>4</SUB> demonstrate the usefulness for magnetic recording and memory devices.</P> <P>Graphic Abstract</P><P>Bi<SUP>3+</SUP>-doping improves the saturation magnetization, coercivity and the remanence magnetization, which can be applied for magnetic recording and memory devices, of CoFe<SUB>2</SUB>O<SUB>4</SUB> ferrite. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5dt00156k'> </P>
Goring, Markus,Fay, Alexander Korean Nuclear Society 2013 Nuclear Engineering and Technology Vol.45 No.5
The design of computer-based instrumentation and control (I&C) systems is determined by the allocation of I&C functions to I&C systems and components. Due to the characteristics of computer-based technology, component failures can negatively affect several I&C functions, so that the reliability proof of the I&C systems requires the accomplishment of I&C system design analyses throughout the I&C life-cycle. On one hand, this paper proposes the restructuring of the sequential IEC 61513 I&C life-cycle according to the V-model, so as to adequately integrate the concept of verification and validation. On the other hand, based on a metamodel for the modeling of I&C systems, this paper introduces a method for the modeling and analysis of the effects with respect to the superposition of failure combinations and event sequences on the I&C system design, i.e. the temporal change of physical structure is analyzed. In the first step, the method is concerned with the modeling of the I&C systems. In the second step, the method considers the analysis of temporal change of physical structure, which integrates the concepts of the diversity and defense-in-depth analysis, fault tree analysis, event tree analysis, and failure mode and effects analysis.
The Integrative Feedback Tool: Assessing a Novel Feedback Tool Among Emergency Medicine Residents
Gore Katarzyna,Schiebout Jessen,Peksa Gary D.,Hock Sara,Patwari Rahul,Gottlieb Michael 대한응급의학회 2023 Clinical and Experimental Emergency Medicine Vol.10 No.3
Objective: Feedback is critical to the growth of learners. However, feedback quality can be variable in practice. Most feedback tools are generic, with few targeting emergency medicine. We created a feedback tool designed for emergency medicine residents, and this study aimed to evaluate the effectiveness of this tool. Methods: This was a single-center, prospective cohort study comparing feedback quality before and after introducing a novel feedback tool. Residents and faculty completed a survey after each shift assessing feedback quality, feedback time, and the number of feedback episodes. Feedback quality was assessed using a composite score from seven questions, which were each scored 1 to 5 points (minimum total score, 7 points; maximum, 35 points). Preintervention and postintervention data were analyzed using a mixed-effects model that took into account the correlation of random effects between study participants. Results: Residents completed 182 surveys and faculty members completed 158 surveys. The use of the tool was associated with improved consistency in the summative score of effective feedback attributes as assessed by residents (P=0.040) but not by faculty (P=0.259). However, most of the individual scores for attributes of good feedback did not reach statistical significance. With the tool, residents perceived that faculty spent more time providing feedback (P=0.040) and that the delivery of feedback was more ongoing throughout the shift (P=0.020). Faculty felt that the tool allowed for more ongoing feedback (P=0.002), with no perceived increase in the time spent delivering feedback (P=0.833). Conclusion: The use of a dedicated tool may help educators provide more meaningful and frequent feedback without impacting the perceived required time needed to provide feedback.
A Stable Design for the State Design Pattern
David Gore 보안공학연구지원센터 2009 International Journal of Software Engineering and Vol.3 No.4
The design of the state pattern is analyzed and the notion of stability of a design is proposed. Mathematical models and ideas from numerical analysis are used to derive a stable design for the state pattern. The stability of the design is illustrated by considering two canonical examples from the OO literature.