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Commercial vs Free E-resources for English Language Teachers
Barry Natusch 한국멀티미디어언어교육학회 2004 멀티미디어 언어교육 Vol.7 No.1
Natusch, Barry. (2004). Commercial vs Free E-resources for English Language Teachers. Multimedia-Assisted Language Learning, 7(1), xx∼xx. The issue of paid-for and free services in an information and communication context is receiving a lot of attention recently, particularly with the publicity surrounding notions of intellectual property and piracy. Definitions of commercial, shareware and freeware are discussed. A selection of commercial and free e-resources for teaching, administrating and researching useful for English teachers is presented and their respective strengths and weaknesses highlighted. The survey concludes by showing that trends emerging among commercial and free ELT resources suggest that while many mainstream applications are freely or cheaply obtainable, certain specialist items are still only available through commercial channels.
Indoor Channel Characteristics for Visible Light Communications
Kwonhyung Lee,Hyuncheol Park,Barry, J R IEEE 2011 IEEE communications letters Vol.15 No.2
<P>In this letter, we present indoor multipath dispersion characteristics for visible light communications (VLC). Since the VLC uses a wide spectrum between 380 nm and 780 nm, the conventional narrowband model for infrared may not apply. We generalize the Barry's model by including wavelength-dependent white LED characteristics and spectral reflectance of indoor reflectors. We perform a computer simulation to compare the power delay profile of the VLC with that of infrared communications. From our studies, we show that the VLC provides a larger transmission bandwidth than infrared communications.</P>
Barry, Jeffrey,Fritz, Michelle,Brender, Jeffrey R.,Smith, Pieter E. S.,Lee, Dong-Kuk,Ramamoorthy, Ayyalusamy American Chemical Society 2009 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.131 No.12
<P>Curcumin is the active ingredient of turmeric powder, a natural spice used for generations in traditional medicines. Curcumin's broad spectrum of antioxidant, anticarcinogenic, antimutagenic, and anti-inflammatory properties makes it particularly interesting for the development of pharmaceutical compounds. Because of curcumin's various effects on the function of numerous unrelated membrane proteins, it has been suggested that it affects the properties of the bilayer itself. However, a detailed atomic-level study of the interaction of curcumin with membranes has not been attempted. A combination of solid-state NMR and differential scanning calorimetry experiments shows curcumin has a strong effect on membrane structure at low concentrations. Curcumin inserts deep into the membrane in a transbilayer orientation, anchored by hydrogen bonding to the phosphate group of lipids in a manner analogous to cholesterol. Like cholesterol, curcumin induces segmental ordering in the membrane. Analysis of the concentration dependence of the order parameter profile derived from NMR results suggests curcumin forms higher order oligomeric structures in the membrane that span and likely thin the bilayer. Curcumin promotes the formation of the highly curved inverted hexagonal phase, which may influence exocytotic and membrane fusion processes within the cell. The experiments outlined here show promise for understanding the action of other drugs such as capsaicin in which drug-induced alterations of membrane structure have strong pharmacological effects.</P>
International Perspectives on Korean Educational Achievements
Barry McGaw 한국교육개발원 2005 KEDI Journal of Educational Policy Vol.2 No.2
Korea values education. Among OECD countries, it has the highest participation rate in upper secondary education and among the highest in tertiary education and it commits the highest percentage of GDP to expenditure on education. Its 15-year-olds are the best in the world in mathematics and problem solving and close to the best in science and reading literacy. Korea’s results are also equitable in the sense that overall differences in social background are not strongly related to differences in educational achievement, though there are marked differences among schools in the social background of students enrolled. In achieving these results, however, young Koreans spend a great deal of their lives on school work, in and out of school. A key issue is whether Korean young people could spend more time in other childhood activities while maintaining their high-quality outcomes, as their counterparts in some other countries do.