Organic electrochemical transistor-based channel dimension-independent single-strand wearable sweat sensors

Kim, Youngseok,Lim, Taekyung,Kim, Chi-Hyeong,Yeo, Chang Su,Seo, Keumyoung,Kim, Seong-Min,Kim, Jiwoong,Park, Sang Yoon,Ju, Sanghyun,Yoon, Myung-Han Nature Publishing Group 2018 NPG Asia Materials Vol.10 No.11

High-performance, polymer-based direct cellular interfaces for electrical stimulation and recording

Kim, Seong-Min,Kim, Nara,Kim, Youngseok,Baik, Min-Seo,Yoo, Minsu,Kim, Dongyoon,Lee, Won-June,Kang, Dong-Hee,Kim, Sohee,Lee, Kwanghee,Yoon, Myung-Han Springer Science and Business Media LLC 2018 NPG Asia Materials Vol.10 No.-

복합열원 온도차발전을 위한 풍력열 이용시스템 기초연구

김영석(Youngseok Kim),김현주(Hyeonju Kim),이호생(Hosaeng Lee),손지훈(Jihun Son),김도완(Dowan Kim) 한국해양환경·에너지학회 2013 한국해양환경공학회 학술대회논문집 Vol.2013 No.5

Synthesis and Characterization of CdS Nanocrystals in a Novel Phosphate Glass

Donghwan Kim,Chawon Hwang,Donggun Gwoo,Taehee Kim,Youngseok Kim,Namjin Kim,류봉기 대한금속·재료학회 2011 ELECTRONIC MATERIALS LETTERS Vol.7 No.4

Zinc-borophosphate glasses doped with various concentrations (≤ 5 wt. %) of cadmium sulfide (CdS) were synthesized. Nanocrystals of CdS were developed in the glass matrices at different concentrations, with emphasis on the quantum confinement effect. The effects of CdS content on the optical and various other properties were investigated. The optical characterization of the glasses was carried out using UV-Visible spectrophotometry. There was a red shift in the optical cut-off with increasing CdS content in the glass. The band gap of the CdS nanocrystals doped in the glass matrix ranged from 3.5 eV to 4.2 eV. The structural characterization,which was carried out using X-ray diffraction, shows the CdS to have hexagonal crystal structure. The average size and shape of the nanocrystals doped in the glass matrix were determined using transmission electron microscopy (TEM). The particle sizes of the doped CdS crystals were in the range of 3 nm to 6 nm for 2 wt. % CdS, and 15 nm to 20 nm for 5 wt. % CdS.

대규모유통업법의 적용 범위에 관한 고찰 - 대규모유통업법의 입법 취지를 중심으로 -

김정헌 ( Kim Junghun ),박종하 ( Park Jongha ),김규식 ( Kim Kyusik ),김영석 ( Kim Youngseok ),김윤수 ( Kim Yunsoo ) 한국유통법학회 2020 유통법연구 Vol.7 No.2

대규모유통업법은 공정거래법상 거래상 지위 남용행위에 대한 특별법임을 감안하여 대규모유통업자가 거래상 우월적 지위를 가지지 않는 거래에 대하여는 대규모유통업법을 적용하지 않도록 규정하였다. 그런데, 최근 공정거래위원회 및 법원은 대규모유통업법상 대규모유통업자에 해당하기만 하면 실질적으로 납품업자에 대하여 거래상 우월적 지위를 가지고 있는지에 대한 심도 있는 검토 없이 그대로 대규모유통업법을 적용하는 경향을 보이고 있다. 그러나, 대규모유통업법이 대규모유통업자와 납품업자 간의 사법상의 권리관계에 제한을 가하는 것으로서 본질적으로 사적 자치의 한계 내지 예외에 해당한다는 점, 공정거래법상 거래상 지위 남용행위의 특별법으로서 강력한 규제가 부과된다는 점 등에 비추어보면, 그 적용 범위를 엄격하게 해석 및 운용할 필요가 있다. 현실적으로 규제당국이 각 납품업자와 대규모유통업자간의 거래상 지위를 일일이 판단하는 것이 어렵다면, 일정한 매출액 규모 요건 등 보다 객관적인 기준을 통해 누가 보더라도 대규모유통업법 적용 대상인지 여부를 쉽게 판단할 수 있도록 개선할 필요가 있다. 한편, 대규모유통업법은 일정 규모 이상의 가맹본부에 대해서도 대규모유통업자로 간주하고 있다. 그러나, (ⅰ) 대규모유통업법은 기본적으로 백화점, 대형마트 등 거래상 지위를 가진 소매업자의 중소 납품업자나 임차인에 대한 불공정거래행위를 규제하는 것을 그 목적으로 하는 법률이어서 도매업자에 가까운 가맹본부에 대해서까지 적용하는 것이 타당한지에 대한 의문이 있다는 점, (ⅱ) 가맹본부에 대규모 유통업법을 적용함으로써 가맹본부로 집결된 협상력을 제한한 결과, 공동구매에 따른 협상력 제고라는 가맹사업의 본질을 해하고 결과적으로 가맹점사업자 보호에 역행한다는 점, (ⅲ) 특히 편의점 가맹본부의 경우 전체 구매 상품 중 67~90%에 이르는 상품을 대기업으로부터 구매하는바, 대규모유통업법으로 인하여 영세한 가맹점사업자보다 오히려 대기업인 납품업자를 보호하게 되는 불합리한 결과가 초래 된다는 점 등에 비추어보면, 관련 규정을 개정할 필요성이 인정된다. 즉, 가맹본부를 대규모유통업법 적용 대상인 대규모유통업자의 범위에서 제외하는 방안을 적극 검토할 필요가 있다. 아울러, 최근 대규모유통업법 개정으로 인해 유통업자가 아닌 부동산 임대사업자에 대하여도 대규모유통업법이 적용되게 되었는바, 이는 대규모유통업자를 규제하는 대규모유통업법의 취지에 부합하지 않고, 상가임대차법과 중복된 이중적 규제라는 등의 문제점이 있으므로 이러한 규제를 유지할 것인지에 대하여도 신중한 검토가 필요하다고 생각된다. The Act on Fair Transactions in Large Retail Business (hereinafter the Large Retail Act) shall not apply to a transaction which is not deemed to give a large retailer a superior bargaining position over a supplier (Article. 3.1.). Nonetheless, recently, the Korea Fair Trade Commission and courts tend to apply the Large Retail Act directly to a certain retail business entity without an in-depth analysis of whether it has actually superior bargaining position over a supplier as long as it is a large retailer under the Large Retail Act However, considering that the Large Retail Act is essentially an exception to principle of private autonomy and it substantially regulates the business activities of large retailer, it is necessary to narrowly interpret the scope of a large retailer. In particular, the Large Retail Act stipulates that the franchisers of a certain size or larger also fall within the scope of a large retailer. However, considering the following, it is highly recom- mended to revise the relevant regulations;(ⅰ) the purpose of the Large Retail Act is basically to regulate the abuse of market dominance or unfair trade practices by large retailers, such as department stores and supermarket. (ⅱ) If the bargaining power aggregated into the franchiser is limited by applying the Large Retail Act to the franchiser, the nature of the franchise business, which is enhancing franchisee's bargaining power by purchasing jointly will be undermined and consequently the protection of franchisees will be impaired;(ⅲ) especially, since convenience store franchisers purchase 67 to 90 percent of the total purchased goods from large companies, the application of the Large Retail Act to franchiser results in unfairly protecting the large suppliers more than the franchisees, which are much smaller than the large suppliers. In order to solve these problems, it is desirable to establish sales volume requirements to determine whether to apply the Large Retail Act, and furthermore, exclude the franchiser from the scope of a large retailer which is subject to the Large Retail Act. Meanwhile, due to the recent revision, the Large Retail Act also applies to real estate rental businesses, which is not distributor. This is not consistent with the objective of the Large Retail Act, which regulates a large retailer, and causes overlapping regulations between the Commercial Building Lease Protection Act and the Large Retail Act. Therefore, a careful consideration is also required on whether to maintain this regulatory framework.

Tailoring emitter material-types for high performance of a-Si/c-Si heterojunction solar cells

Hyunsung KIM,Sangho KIM,Sunbo KIM,Yongjun KIM,Anh Huy Tuan LE,Youngseok LEE,Jinjoo PARK,Ving Ai DAO,Junsin YI 한국진공학회 2016 한국진공학회 학술발표회초록집 Vol.2016 No.8

A New Putative Chitinase from Reticulitermes speratus KMT001

( Youngseok Ham ),( Han-Saem Park ),( Yeong-Suk Kim ),( Tae-Jong Kim ) 한국목재공학회 2019 목재공학 Vol.47 No.3

Termites are pests that cause serious economic and cultural damage by digesting wood cellulose. Termites are arthropods and have an epidermis surrounded by a chitin layer. To maintain a healthy epidermis, termites have chitinase (β-1,4-poly-N-acetyl glucosamidinase, EC 3.2.1.14), an enzyme that hydrolyzes the β-1,4 bond of chitin. In this study, the amino acid sequence of the gene, which is presumed to be termite chitinolytic enzyme (NCBI accession no. KC477099), was obtained from a transcriptomic analysis of Reticulitermes speratus KMT001 in Bukhan Mountain, Korea. An NCBI protein BLAST search confirmed that the protein is a glycoside hydrolase family 18 (GH18). The highest homology value found was 47%, with a chitinase from Araneus ventricosus. Phylogenetic analysis indicated that the KC477099 protein has the same origins as those of arthropods but has a very low similarity with other arthropod chitinases, resulting in separation at an early stage of evolution. The KC477099 protein contains two conserved motifs, which encode the general enzymatic characteristics of the GH18 group. The amino acid sequences Asp¹⁵⁶-Trp¹⁵⁷-Glu¹⁵⁸, which play an important role in the enzymatic activity of the GH18 group, were also present. This study suggests that the termite KC477099 protein is a new type of chitinase, which is evolutionarily distant from other insect chitinases.

A Study on Rima Hadley Region of the Moon Using Moon Mineralogy Mapper(M3) Spectra (M3 스펙트럼 데이터를 이용한 달 Rima Hadley 지역 연구)

Youngseok Oh,Ho Jin,Khan-Hyuk Kim,Sungsoo S. Kim 한국천문학회 2015 天文學會報 Vol.40 No.2

Clogging mechanism of poly(styrene) particles in the flow through a single micro-pore

Kim, Youngseok,Ahn, Kyung Hyun,Lee, Seung Jong Elsevier 2017 Journal of membrane science Vol.534 No.-

<P><B>Abstract</B></P> <P>In this study, the clogging mechanism of poly(styrene) particles in the flow through a single micro-pore was investigated. Together with the microscopic observation, the pressure drop was also measured. The pressure drop fluctuated according to the amount of particles deposited inside the channel. When the particles deposited and blocked the channel, the channel was clogged and the pressure drop increased sharply. During the clogging process, the particles were often detached by the flow, and interesting behaviors, such as “rolling” and “stick and detach”, were found to be the key factors that determine whether the clogging completely occurs or not. Above a certain flow rate, the channel was not clogged and the pressure drop did not increase further. The particles deposited in the upstream had an influence on the flow path. When the particles were deposited in the upstream, the flow detoured and the vortex was formed. The effect of viscosity was examined by controlling the concentration of glycerol solution. As the viscosity and the flow rate increased, the shear stress applied to the particles became larger and it was more difficult for the particles to get accumulated. The normalized clogging pressure drop decreased exponentially with shear stress. It was unity above a certain shear stress, in which the particles did not clog the channel completely.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The clogging mechanism of poly(styrene) particles in the flow through a single micro-pore was investigated. </LI> <LI> The particles deposited near the contraction caused the pressure drop to increase and the formation of the vortex. </LI> <LI> As the shear stress increased, it became easier for the particles to be washed away and the channel was rarely clogged. </LI> <LI> There exists a critical stress that determines whether the clogging will occur or not. </LI> </UL> </P>

E-Transformation from EDI to Web-based B2B Frameworks

Kim, Minsoo,Ock, YoungSeok,Kim, Dongsoo Korean Institute of Industrial Engineers 2008 Industrial Engineeering & Management Systems Vol.7 No.2

Lots of EDI-VAN companies are in need of transforming their business transaction systems into Web-based e-Business frameworks because of high cost and closed structure of EDI systems. This research proposes several e-Transformation strategies for EDI-VAN companies to adopt Web-based e-Business frameworks such as ebXML and RosettaNet. Four transformation alternatives are presented and transformation procedure for a medium-sized company is described. The result of this work can be used as a practical guideline for EDI companies to develop their own transformation strategy suitable to its scale and capability, while minimizing the impacts on the pre-existing business processes and information systems.