Search

Your search keyword '"Hong, Sung-Hoon"' showing total 406 results
Start Over Author "Hong, Sung-Hoon"
406 results on '"Hong, Sung-Hoon"'

184. Screening of Basal Cell Carcinoma by Automatic Classifiers with an Ambiguous Category.

Author

Huang, De-Shuang, Li, Kang, Irwin, George William, Baek, Seong-Joon, Park, Aaron, Kim, Daejin, Hong, Sung-Hoon, Kim, Dong Kook, and Lee, Bae-Ho

Abstract

Raman spectroscopy is known to have strong potential for providing noninvasive dermatological diagnosis of skin cancer. According to the previous work, various well known methods including maximum a posteriori probability (MAP), multilayer perceptron networks (MLP), and support vector machine (SVM) showed competitive results. Since even the small errors often leads to a fatal result, we investigated the method that reduces classification error perfectly by screening out some ambiguous patterns. Those ambiguous patterns can further be examined by routine biopsy. We incorporated an ambiguous category in MAP, linear classifier using minimum squared error (MSE), and MLP. The experiments involving 216 confocal Raman spectra showed that every methods could perfectly classify basal cell carcinoma (BCC) by screening out some ambiguous patterns. The best results were obtained with MSE. According to the experimental results, MSE gave perfect classification by screening out 8% of test patterns. [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

188. Issues in round harmony: Grounding, identity and their interaction.

Author

Hammond, Michael, Demers, Richard, Hong, Sung-Hoon, Hammond, Michael, Demers, Richard, and Hong, Sung-Hoon

Abstract

This dissertation examines the cross-linguistic patterns of "height-constrained" Round Harmony (RH), from the perspective of Grounding Condition Theory proposed by Archangeli and Pulleyblank (in press). The fundamental claim advanced here is that the attested patterns of RH are due to two conditions, (i) the grounded path condition R(oun)D/HI(gh), "if (+round) then (+high) " or "if (+round) then not (-high)", and (ii) the Phonological Identity Condition (PIC). The grounded condition RD/HI, motivated from the physiological correlation between lip rounding and tongue height (mediated by jaw opening), holds of the targets of rules, thereby restricting the application of RH to high vowel targets. The PIC, on the other hand, is proposed to characterize the contextual identity requirement for rules. Two important properties of the PIC are noted: (i) that it is a non-representational condition, and (ii) that identity referred to by the PIC is implemented as logical equivalence. The non-representational PIC is motivated from the cases of "nonadjacent" identity (i.e. the cases where contextual identity can be defined across a transparent element, e.g. Khalkha Mongolian RH), where a representational analysis based on OCP-induced fusion fails because it results in either illformed "gapped" representations or violation of the No-Crossing Line Convention. Further, the equivalence interpretation of identity is proposed to break away from otherwise mandatory rules of redundant feature insertion for cases like Yawelmani RH, where identity refers to both values of a feature. Drawing on these two conditions, this dissertation demonstrates that the observed patterns of height-constrained RH are correctly predicted by recognizing two factors, the rule types characterized by these conditions, and the way that these rule types are invoked by languages.

Published
1994

190. Fabrication and evaluation of nickel cobalt alloy electrocatalysts for alkaline water splitting.

Author

Hong, Sung Hoon, Ahn, Sang Hyun, Choi, Insoo, Pyo, Sung Gyu, Kim, Hyoung-Juhn, Jang, Jong Hyun, and Kim, Soo-Kil

Subjects
*COBALT nickel alloys, *MICROFABRICATION, *ELECTROCATALYSTS, *WATER, *ALKALINE solutions, *HYDROGEN evolution reactions, *ALLOY plating
Abstract

Highlights: [•] The paper presents alloy effect of Ni and Co on hydrogen evolution reaction (HER). [•] The various material properties of electrodeposited NiCo alloys are demonstrated. [•] Relationship between activities and material properties are discussed. [•] High activity of HER in alkaline solution is achieved with NiCo alloy catalysts. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

197. Chemically Tailored Dielectric-to-MetalTransitionfor the Design of Metamaterials from Nanoimprinted Colloidal Nanocrystals.

Author

Fafarman, Aaron T., Hong, Sung-Hoon, Caglayan, Humeyra, Ye, Xingchen, Diroll, Benjamin T., Paik, Taejong, Engheta, Nader, Murray, Christopher B., and Kagan, Cherie R.

Subjects
*METAMATERIALS, *OPTICAL materials, *DIELECTRICS, *METALS, *COLLOIDAL crystals, *NANOCRYSTALS
Abstract

We demonstrate optical metamaterial design using colloidalgoldnanocrystal building blocks. In the solid state, chemically exchangingthe nanocrystals’ surface-capping molecules provides a tailorabledielectric-to-metal transition exhibiting a 1010rangein DC conductivity and dielectric permittivity ranging from everywherepositive to everywhere negative throughout the visible-to-near-IR.Direct, wide-area nanoimprinting of subwavelength superstructuresat room temperature, on plastic and glass substrates, affords plasmonicresonances ranging from 660 to 1070 nm, in agreement with numericalsimulations. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

199. Light extraction efficiency improvement in GaN-based blue light emitting diode with two-dimensional nano-cavity structure

Author

Cho, Joong-Yeon, Hong, Sung-Hoon, Byeon, Kyeong-Jae, and Lee, Heon

Subjects
*EXTRACTION (Chemistry), *GALLIUM nitride, *NANOSTRUCTURED materials, *LIGHT emitting diodes, *PHOTONIC crystals, *CRYSTAL structure, *LITHOGRAPHY
Abstract

Abstract: The light extraction efficiency of light emitting diode (LED) devices was improved by embedding nano-sized two-dimensional, air cavity photonic crystal (PC) structure on the indium tin oxide (ITO) layer of GaN-based LEDs. The embedded air cavity PC structure was fabricated using a reversal imprint lithography technique. The nano-cavity patterns had a width of 560nm, a space of 240nm and a height of 280nm. According to current–voltage characterization, the electrical performance of the LED devices was not degraded by the fabrication process of air cavity PC structure. The optical output power of the LED device was increased by up to 10% at a drive current of 20mA by forming the nano-cavity PC structure on the transparent electrode of the blue LED device, which was grown on a patterned sapphire substrate, to maximize the photon extraction. Since photons are scattered with cavities and are unaffected by the packaging process, which is the encapsulation of a LED device with epoxy resin, this enhancement in light extraction efficiency will not be decreased after the packaging process. [Copyright &y& Elsevier]

Published
2012
Full Text
View/download PDF

200. High density phase change data on flexible substrates by thermal curing type nanoimprint lithography

Author

Hong, Sung-Hoon, Jeong, Jun-Ho, Kim, Kang-In, and Lee, Heon

Subjects
*NANOTECHNOLOGY, *LITHOGRAPHY, *DENSITY, *PHASE transitions, *SUBSTRATES (Materials science), *CURING, *STAINLESS steel, *POLYETHYLENE terephthalate
Abstract

Abstract: In this study, high density phase change nano-pillar device (Tera-bit per inch2 data density) was fabricated on flexible substrates by thermal curing type nanoimprint lithography with high throughput at a relatively low temperature (120°C). Phase change nano-pillar was formed with on flexible poly (ethylene terephthalate) (PET) film, polyimide (PI) film, and stainless steel plate (SUS) substrate without any damage of substrate. The electrical property of the fabricated phase change nano-pillar device was confirmed by electrical signal measuring of conductive atomic force microscopy. [Copyright &y& Elsevier]

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results