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281.

A Review of Cost-Effectiveness Analysis and Model of Hearing Aid Fitting

Soo Hee Oh, Hyungi Chun, Kyoungwon Lee, Junghak Lee 한국청각언어재활학회 Audiology and Speech Research 6 Pages

한국청각언어재활학회 Audiology and Speech Research 2017, 제 13권 제 2호 1 95-100 (6 pages)

Soo Hee Oh, Hyungi Chun, Kyoungwon Lee, Junghak Lee 저
...
- 3,000원
Purpose: Although many previous literatures investigated various outcomes of hearing aid fitting, a few studies explored the cost-effectiveness of hearing aid fitting and its underlying model. Examining cost effectiveness of hearing aid fitting provides comparative values of hearing aid fitting by measuring the economic gains of hearing aid interventions. The purpose of present study is to understand the cost-related outcomes and benefits of hearing aid uses and provide economic insights of...
282.

P1-N1-P2 Complex and Acoustic Change Complex Elicited by Speech Sounds: Current Research and Applications

Woojae Han 한국청각언어재활학회 Audiology and Speech Research 7 Pages

한국청각언어재활학회 Audiology and Speech Research 2010, 제 6권 제 2호 2 121-127 (7 pages)

Woojae Han 저
...
- 3,000원
283.

정상과 고심도 감각신경성난청에서 청성지속반응(Auditory Steady-State Response)에 영향을 주는 변수에 관한 고찰

조수진, 이정학, 김형종, 조소현, 임덕환, 김진숙 한국청각언어재활학회 Audiology and Speech Research 7 Pages

한국청각언어재활학회 Audiology and Speech Research 2005, 제 1권 제 1호 5 28-34 (7 pages)

조수진, 이정학, 김형종, 조소현, 임덕환, 김진숙 저
...
- 3,000원
청성지속반응(auditory steady-state response, ASSR)은 연속적인 음 자극(continuous acoustic stimuli)에 대한 청각전도로의 반응으로 특히 고심도 난청의 청력을 추정할 수 있는 대표적인 객관적 검사로 알려져 있다.12) 이러한 ASSR은 변조된 순음(pure tone)에 의해서 유발되기 때문에 청성뇌간반응(auditory brainstem response, ABR) 측정 시 주로 사용하는 클릭음(click)보다 와우의 좁은 부위를 자극하게 되어 주파수 특이성이 더 높고,9) 자동반응탐지 알고리즘(automatic response detection algorithm)을 사용하기 때문에...
284.

Exploring the Stability of the Immediate Achievement-Level Results on the National Assessment of Educational Achievement

Lee Sora, Park Chanho, Seo Minhee 한국교육학회 교육학연구 21 Pages

한국교육학회 교육학연구 2022, 60권 3호 4 71-91 (21 pages)

Lee Sora, Park Chanho, Seo Minhee 저
...
- 5,000원
Previously, the evaluation results (four levels of academic achievement) for the paper-based National Assessment of Educational Achievement (NAEA) were available only two months after the assessment was conducted. At that time, the usefulness of the evaluation results was very low because the students interest and memory of the evaluation had already decreased. While surveying school sites for their input on the introduction of computer-based tests for the NAEA in 2022, the demand for immediate...
285.

Catalytic hydrogenation-assisted preparation of melt spinnable pitches from petroleum residue for making mesophase pitch based carbon fibers

Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 4 28-35 (8 pages)

Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 저
...
- 3,000원
We demonstrated an effective way of preparing melt spinnable mesophase pitches via catalytic hydrogenation of petroleum residue (fluidized catalytic cracking-decant oil) and their subsequent thermal soaking. The mesophase pitches thus obtained were analyzed in terms of their viscosity, elemental composition, solubility, molecular weight, softening point and optical texture. We found that zeolite-induced catalytic hydrogenation under high hydrogen pressure contributed to a large variation in the...
286.

Effect of the surface modification using MWCNTs with different L/D by two different methods of deposition on the IFSS of single carbon fiber-epoxy resin composite

Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 3 18-27 (10 pages)

Minerva L. Herrera-Sosa, Alex Valadez-Gonz?lez, Humberto V?zquez-Torres, Pierre G. Mani-Gonz?lez, Pedro J. Herrera-Franco 저
...
- 3,000원
Multiwall carbon nanotubes (MWCNT) with two different (L/D) aspect ratios (7±2 μm/140±30 nm and 0.5?2 μm/8?15 nm) were surface treated using nitric acid (HNO3) and polyethyleneimine (PEI) prior to their deposition on carbon fibers (CF). Before the hierarchical reinforcement with CF-MWCNT, the CFs were treated with 3-glycidoxypropyltrimethoxysilane, a coupling agent (Z6040) and with poly(amidoamine) (PAMAM) a dendrimer containing an ethylenediamine core and amine surface groups. The MWCNT...
287.

Applications of carbon-based materials in solid phase micro-extraction: a review

Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 한국탄소학회 Carbon Letters 8 Pages

한국탄소학회 Carbon Letters 2017, Vol.24 2 10-17 (8 pages)

Jian Guo, Soo-Jin Park, Long-Yue Meng, Xinghua Jin 저
...
- 3,000원
With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption...
288.

Pitch-based carbon fibers from coal tar or petroleum residue under the same processing condition

Jiyoung Kim, Ui-Su Im, Byungrok Lee, Dong-Hyun Peck, Seong-Ho Yoon, Doo-Hwan Jung 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2016, Vol.19 9 72-78 (7 pages)

Jiyoung Kim, Ui-Su Im, Byungrok Lee, Dong-Hyun Peck, Seong-Ho Yoon, Doo-Hwan Jung 저
...
- 3,000원
Spinnable pitches and carbon fibers were successfully prepared from petroleum or coal pyrolysis residues. After pyrolysis fuel oil (PFO), slurry oil, and coal tar were simply filtered to eliminate the solid impurities, the characteristics of the raw materials were evaluated by elemental analysis, 13C nuclear magnetic resonance spectrometer, matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (MALDI-TOF-MS), and so on. Spinnable pitches were prepared for melt-spinning...
289.

Cu²? ion reduction in wastewater over RDF-derived char

Hyung Won Lee, Rae-su Park, Sung Hoon Park, Sang-Chul Jung, Jong-Ki Jeon, Sang Chai Kim, Jin Do Chung, Won Geun Choi, Young-Kwon Park 한국탄소학회 Carbon Letters 7 Pages

한국탄소학회 Carbon Letters 2016, Vol.18 8 49-55 (7 pages)

Hyung Won Lee, Rae-su Park, Sung Hoon Park, Sang-Chul Jung, Jong-Ki Jeon, Sang Chai Kim, Jin Do Chung, Won Geun Choi, Young-Kwon Park 저
...
- 3,000원
Refuse-derived fuel (RDF) produced using municipal solid waste was pyrolyzed to produce RDF char. For the first time, the RDF char was used to remove aqueous copper, a representative heavy metal water pollutant. Activation of the RDF char using steam and KOH treatments was performed to change the specific surface area, pore volume, and the metal cation quantity of the char. N2 sorption, Inductively Coupled Plasma-Atomic Emission Spectrometer (ICP-AES), and Fourier transform infrared spectroscopy...
290.

One-step synthesis of dual-transition metal substitution on ionic liquid based N-doped mesoporous carbon for oxygen reduction reaction

Ulziidelger Byambasuren, Yukwon Jeon, Dorjgotov Altansukh, Yunseong Ji, Yong-Gun Shul 한국탄소학회 Carbon Letters 12 Pages

한국탄소학회 Carbon Letters 2016, Vol.17 No.1 8 53-64 (12 pages)

Ulziidelger Byambasuren, Yukwon Jeon, Dorjgotov Altansukh, Yunseong Ji, Yong-Gun Shul 저
...
- 4,100원
Nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a dual transition metal system were synthesized as non-Pt catalysts for the ORR. The highly nitrogen doped OMCs were prepared by the precursor of ionic liquid (3-methyl-1-butylpyridine dicyanamide) for N/C species and a mesoporous silica template for the physical structure. Mostly, N-doped carbons are promoted by a single transition metal to improve catalytic activity for ORR in PEMFCs. In this study, our N-doped mesoporous carbons were...

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