10,460 research outputs found

    The analysis of the JW scheme and its improving versions

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    Recently, several promising window-based policing schemes have been proposed. It is worthwhile to analyze them for performance comparison. In this letter, we formulate numerical equations to evaluate the improved versions of the JW scheme as well as the JW scheme itself. We also show the correctness of our formulation using the simulation results.open111sciescopu

    Contrasting hysteresis behavior between the magneto-optical Kerr rotation and ellipticity in NiFe/FeMn/Co trilayer films

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    We report an experimental observation of strikingly contrasting hysteresis behaviors between the longitudinal magneto-optical Kerr rotation, theta(K), and ellipticity, epsilon(K), in NiFe/FeMn/Co films. For example, one is likely to reproduce a typical magnetic hysteresis loop obtainable with vibrating sample magnetometry while the other one does reproduce magnetoresistance (MR)-like curves in some cases. Interestingly, theta(K)/epsilon(K) loops form inverse MR curves. The contrasting hysteresis behavior could be explained by the discriminate sensitivity of theta(K) and epsilon(K) to the ferromagnetic NiFe as well as Co layers. Using a simple model, we determine the sensitivity ratios of the Co to NiFe layer for both signals, which are far from unity as much as theta(K)(Co)/theta(K)(NiFe)=-1.4 and epsilon(K)(Co)/epsilon(K)(NiFe)=8.5. These values may allow one to understand the anomaly of the remarkably contrasting loops observed in NiFe/FeMn/Co trilayer films. (C) 2002 American Institute of Physics.This work was supported by the Korean Ministry of Science and Technology through the Creative Research Initiatives Project. K. Y. Kim was supported by the KRCF ~Korea Research Council of Fundamental Science and Technology! project on technology for Quantum Dots-Functional Devices

    Segregation induced reconstructions of Li-Al(110) alloy surface

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    The surface segregation of Li in Al(110)-12.7at%Li alloy and simultaneous reconstructions are investigated using Auger electron spectroscopy and low energy electron diffraction. The measured diffusion coefficient and barrier energy of Li segregation to the alloy surface was close to that of a bulk one. The saturation coverage of Li was close to 1 monolayer, that is, the ratio of the atomic number of Li to Al is 1:1 after heat treatment. Based on the measurement of the surface Li coverages for the c(2 x 2) and (2 x 1) surface reconstructions, we suggest possible model structures. (C) 1997 Elsevier Science B.V.Financial supports have been partially provided by the center for molecular science and KOSEF. We thank professor J.K. Park for providing the sampl

    Growth and electronic properties of Ag overlayers on stepped Pt(211) surface

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    The growth and electronic properties of ultrathin silver films deposited onto Pt(211) surface were studied using Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and x-ray photoelectron spectroscopy. The AES and LEED results indicate that the silver grows by a layer by layer growth followed by three dimensional islands growth. The XPS results show that the AR 3d core-level binding energy of Ag overlayers on Pt(211) shifts toward lower binding energy relative to the bulk value at lower Ag coverage. This negative binding energy shift of the Ag 3d core level is explained by the reduced coordination number oi the overlayer atoms and the resulting initial state band narrowing effect suggested by Wertheim and Citrin [Phys. Rev. Lett. 1978, 41, 1425]

    Comparison of the clinical characteristics and treatment outcomes of patients requiring hospital admission to treat eosinophilic and neutrophilic exacerbations of COPD [Corrigendum]

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    Kang HS, Rhee CK, Kim SK, Kim JW, Lee SH, Yoon HK, Ahn JH, Kim YH. Int J Chron Obstruct Pulmon Dis. 2016;11:2467–2473.Page 2467, Abstract, Results section, line 1, the text “COPD exacerbations (177 eosinophilic and 380 neutrophilic) were included” should read “COPD exacerbations (177 eosinophilic, 380 neutrophilic and 48 paucigranulocytic) were included. Of these, we compared patients with eosinophilic and neutrophilic COPD exacerbations”.Read the original articl

    Kim Maneuver for Anterior Canal BPPV (Video)

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    The Kim Maneuver for Anterior Canal can be used to treat individuals with anterior canal BPPV. 1. The patient\u27s head is turned 45 degrees towards the unaffected side. 2. The patient transitions into a supine position with the head hanging 30 degrees below the horizon. 3. After two minutes, the head is positioned in a neutral position (supine). 4. After one minute, the patient returns to a seated position with the chin tilted down about 30 degrees.Kim YK, Shin JE, Chung JW. The effect of canalith repositioning for anterior semicircular canal canalithiasis. ORL J Otorhinolaryngol Relat Spec. 2005;67:56-60. https://doi.org/10.1159/00008433

    Kim Maneuver for Anterior Canal BPPV

    No full text
    The Kim Maneuver for Anterior Canal can be used to treat individuals with anterior canal BPPV. 1. The patient\u27s head is turned 45 degrees towards the unaffected side. 2. The patient transitions into a supine position with the head hanging 30 degrees below the horizon. 3. After two minutes, the head is positioned in a neutral position (supine). 4. After one minute, the patient returns to a seated position with the chin tilted down about 30 degrees.Kim YK, Shin JE, Chung JW. The effect of canalith repositioning for anterior semicircular canal canalithiasis. ORL J Otorhinolaryngol Relat Spec. 2005;67:56-60. https://doi.org/10.1159/00008433
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