Microfluidic Microplastics Trap Module for Detection by Fluorescent Staining

Seongcheol SHIN,Hyun Ho LEE,Seungju OH,Hyeyeon HUR,Jongmin YANG,Dhanashiri DESAI,Gillhwan KIM,Chorong KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10

Microplastics has a negative impact on marine ecosystems and humans. In this study, we developed microfluidic devices as microplastics trap modules using polydimethylsiloxane (PDMS) using photolithography or laser ablation. For a generation of turbulent flow to separate microplastics, several grooves were pattered inside the microfluidic channel. It proves that grooved channel is an efficient platform to trap the microplastics by recirculation. Finally, the microfluid trap module could be connected with PDMS mixer module to selectively stain the trapped microplastics my fluorescent dye.

Microfluidics Mixer Platform for Efficient Fluorescent Labeling of Microplastics

Seongcheol SHIN,Hyun ho LEE,Seungju OH,Hyeyeon HUR,Jongmin YANG,Dhanashri DESAI,Gillhwan KIM,Chorong KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10

Microplastics are small plastic particles less than 5 mm, and their environmental problems are caused by their increased accumulations throughout the food chains. However, there have been a number of hardships to qualify and quantify the amount of microplastics. In this study, we fabricate microfluidic mixer device using polydimethylsiloxane (PDMS) by SU-8 photolithography or by laser ablation method for efficient fluorescent labeling of individual microplastics inside of serpentine microfluidic channel. It shows that mixing channel is an efficient platform to fluorescently label the microplastics with a short time scale additionally with recirculation of fluorescent labeling mixture.

Characteristics of Bioelectronics Memory Device with Indigo and Lactose Based Dielectric Layer

Seongcheol SHIN,Dhanashri DESAI,Gillhwan KIM,Cholong KIM,Boeun JEON,A Hyeon JO,Eunsu JANG,Hyun Ho LEE 한국생물공학회 2022 한국생물공학회 학술대회 Vol.2022 No.9

Characterization of Microfluidics Trap and Mixer Platform for Efficient Fluorescent Tagging of Microplastics

Seongcheol SHIN,Hyun Ho LEE,Dhanashri DESAI,Gillhwan KIM,Cholong KIM 한국생물공학회 2022 한국생물공학회 학술대회 Vol.2022 No.4

언간 자료와 사전의 표제어

신성철(Seongcheol Shin) 한국중원언어학회 2010 언어학연구 Vol.0 No.18

The purpose of this paper is to set up the standard of what was selected as headwords out of diverse different expressions of one word and to make a plan for selecting headwords of 'vernacular script word example dictionary'. To do so, this study examines the existing archaic dictionaries on the basis of 'selection of headword', 'format of headword items' and 'arrangement method of headword items'. In this paper, I also review the standard of 'selection of headwords', 'format of headword items' and 'arrangement method of headword items' in vernacular script word example dictionary. When one word has diverse forms and only one form or some forms are selected as a headword, we need to know the linguistic information of the remaining forms in advance. 'Vernacular script word example dictionary' selects different words followed by historic changes, regional dialects, social class, each expression and each specific family, as a headword. Because it has characteristics followed by distribution of the times from the 16th century to the 19th century; geographical distribution of Seoul/Gyeonggi, Chungcheong and Gyeongsang; distribution of nobleman's class and gender in royal family; expressive distribution with differences in recognition about expressions; and distribution by each family with differences by each family. In the format of headword items, the study used form analysis applied to the 「Grand Dictionary of Korean Language 4 - old sayings and Idu」. In the arrangement method of headword items, the study regarded the syllabic order prescribed by 'Korean Orthography' as standard, and arranged by the Byeongseo letters of initial consonant and final consonant.

원순모음화 관련 연철ㆍ분철 표기의 음운론적 인식 고찰

신성철(Seongcheol Shin) 한국중원언어학회 2012 언어학연구 Vol.0 No.22

This paper examines how the syllabication spelling of Modern Korean operates as the non-phonological constraints, and figured out how the distinctive feature divided into morpheme boundaries is the factor limiting the phonological phenomenon in its internalized process. The rounding refers to the phenomenon where [labial] of labial transforms the connected unrounded vowel to rounded vowel. In syllabication spelling such [labial] does not go over the morpheme boundary and function as a assimilatior, but in liaison spelling, [labial] has already gone over the morpheme boundary, so the rounding is applied. When discussing the expansion process of phonological phenomenon in Modern Korean, the liaison spelling applying phonological phenomenon is not precise enough, but the syllabication spelling should be included in the study subject for precise examination of the internalized process and the expansion process at the morpheme boundary.

현대국어 ‘들-’[食]의 대우 기능과 선택 조건

신성철(Seongcheol Shin) 한국중원언어학회 2014 언어학연구 Vol.0 No.30

The purpose of this article is that the honorific functions and its conditions of choice about ‘deul-’[EAT] in modern Korean is the identifying features. ‘deul-’ is ‘meok-’ type lexical honorific verbs with [EAT] and meaning [+HIGH]. So, ‘deul-’ is not a formal body rating relative to the exalted as ‘meok-’, ‘jasi-’ and ‘japsu-’ are antagonistic. Only non-formal rating of meaning [+HIGH] is meaning property. And When using ‘deul-’, you have two choices are sequentially. The first condition is whether or not the subject"s clarity Act and the second condition is whether or not the clarity of meaning [+HIGH]. In addition, principals exalted prefinal is combined with ‘deusi-’. Act principals and clarity of meaning [+HIGH], regardless of whether it is used in all conditions. But act means the subject and [increase +] than we do when ambiguity, we preferred. When act subject and meaning [+HIGH] is ambiguous, it prefer ‘deul-’ rather than ‘deusi-’.

조선 전기 한글 편지에 나타난 ‘ㄹ’ 두음법칙과 ‘ㄹ’ 비음화의 통시적 고찰

신성철(Shin, Seongcheol) 중앙어문학회 2020 語文論集 Vol.81 No.-

이 논문은 17세기 이전의 조선시대 한글 편지를 중심으로 ‘ㄹ/ㄴ’ 두음법칙과 ‘ㄹ’ 비음화의 적용 과정에 나타나는 개인별 수용 양상을 분석하면서 국어사 판본 자료에 비하여 자연언어에 근접하는 자료적 가치가 있음을 밝히고, ‘ㄴ’ 두음법칙이 최소 16세기부터 실현되었음을 살펴보고자 한다. 조선시대 판본 자료에서 ‘ㄹ’ 두음법칙과 ‘ㄹ’ 비음화가 90% 이상 반영된 것은 17세기부터이다. 그러나 조선 전기의 한글 편지에서는 ‘ㄹ’ 두음법칙과 ‘ㄹ’ 비음화가 16세기 이전에 100%나 100%에 거의 근접한 비율을 보인다. 음운 층위에서 한글 편지가 판본 자료보다 당시의 생생한 국어의 음운 현상에 한층 더 근접한 모습이 반영된 것이며, 대부분의 판본 자료보다는 한글 편지가 자연언어에 더 가까운 자료적 성격을 지닌 것에 기인한다. 한편, 조선 전기 한글 편지에 나타난 ‘양식’은 ‘糧食’에 대응되며, ‘ㄹ’ 두음법칙과 ‘ㄴ’ 두음법칙이 연속적으로 적용된 용례이다. 또한 ‘ㄴ’ 두음법칙의 과도교정 용례가 최소 16세기부터 나타나는 실태를 고려하면, ‘양식’은 ‘ㄹ’ 두음법칙과 ‘ㄴ’ 두음법칙이 연속적으로 적용된 것이며, 그 결과로 ‘ㄹ→ㅇ’이 반영된 것이다. 그러므로 ‘ㄴ’ 두음법칙은 최소 16세기 이전에 발생된 음운 현상이다. This study examines individual acceptance patterns in the application process of "R/N-Initial Law" and "R-nasalization" based on the Hangeul letters, until the 17th century; tries to identify the natural linguistic characteristics close to the Hangeul letters; and reveals that the "N-Initial Law" emerged at least from the 16th century. More than 90 percent of the Joseon Dynasty"s "R-Initial Law" and "R-nasalization" were reflected in the 17th century literature. However, during the early Joseon Dynasty, i.e., before the 16th century, the ratio of "R-Initial Law" and "R-nasalization" in the Hangeul letters was around 100 percent. This reflects the fact that the Hangeul letters are closer to the phonemic phenomenon of Korean language than that of Korean literature. This is because it has more of a materialistic nature that is closer to a natural language than written literature. Also, "양식" that appeared in the Hangeul letters during the early Joseon Dynasty corresponds to "糧食." Considering the existence of the use cases in which the "N-Initial Law" was applied in the 16th century at least, the "R-Initial Law" and "N-Initial Law" were applied consecutively and "ㄹ→ㅇ" was reflected. The "N-Initial Law" also appeared in the 16th century.

격음의 이중 표기와 음성적 특징

신성철(Shin Seongcheol) 국어문학회 2008 국어문학 Vol.45 No.-

In this study, I understand that the double writings of the aspirated consonants have the same root, but they went through the process of selecting the writing types consecutively. This study focused on phonological phenomena, the recognition of correspondence, and the phonetic features under my assumption that each phonetic form has three writing forms. I founded that the ''ㅅ’ of ''ㅅ+ㅊ’ in the type(2) was realized [t<SUP>┓</SUP>] not only in the modern Korean but also in the middle age Korean. Moreover, I founded that ''ㅈ, ㅊ, auxiliary ㅅ(or sai si-ot)’ were realized [t<SUP>┓</SUP>] from 15 century, and I also analyzed that ''ㅅ+ㅊ’ is composed of two phonetic values [t<SUP>┓</SUP>] and [c?]. In contrast, the ''ㅊ=ㅅ+ㅎ’ type appears at ''Oryunjeonbieonhae(1721)’. I understand that the examples such as ''빗히, 빗히로다, 낫낫히’ are combined with the subjective particle ''이’, predicative particle ''이다’, adverb derived suffix ''-이’ respectively and situated in the palatalization environment at the same time. In my view, above three examples were influenced by the over-correction of the palatalization. On the other hand, I found that the examples ''빗?, 빗헤, 것흐로, 것?, 갓?셔, 걷흐로만’ were influenced by the re-structuralization in relation to the non-phonological reasons. Therefore, with the above reasons, I assume that ''ㅅ+ㅎ’, the type(3) of ''ㅊ’, is not corresponding to ''ㅊ’, but ''ㅌ’. In short, it would be possible to correct the combined writings by three types and suggest their phonetic reality as follows; 이미지 참조

SLC/MLC 혼합 플래시 메모리를 이용한 하이브리드 하드디스크 설계

홍성철(Seongcheol Hong),신동군(Dongkun Shin) 한국정보과학회 2010 정보과학회 컴퓨팅의 실제 논문지 Vol.16 No.7

최근 플래시 메모리 기반 비휘발성 캐시가 저장장치의 성능과 전력 소모 측면에서 효과적인 해법으로 떠오르고 있다. 비휘발성 캐시로 저장장치의 성능을 향상시키고 전력 소모를 줄이기 위해, 가격이 싸고 용량이 큰 multilevel-cell (MLC) 플래시 메모리를 사용하는 것이 좋다. 그러나 MLC 플래시 메모리의 수명은 single-level-cell (SLC) 플래시 메모리보다 훨씬 짧기 때문에 전체 저장장치의 수명이 짧아질 수 있다. 이러한 약점을 최소화하기 위해 SLC 플래시 메모리와 MLC플래시 메모리를 결합한 형태의 비휘발성 캐시를 고려해볼 수 있다. 본 논문에서는 SLC와 MLC를 결합한 플래시 메모리를 버퍼로 사용하는 새로운 하이브리드 하드디스크 구조를 제안한다. Recently, flash memory-based non-volatile cache (NVC) is emerging as an effective solution to enhance both I/O performance and energy consumption of storage systems. To get significant performance and energy gains by NVC, it would be better to use multilevel-cell (MLC) flash memories since it can provide a large capacity of NVC with low cost. However, the number of available program/erase cycles of MLC flash memory is smaller than that of single-level-cell (SLC) flash memory limiting the lifespan of NVC. To overcome such a limitation, SLC/MLC combined flash memory is a promising solution for NVC. In this paper, we propose an effective management scheme for heterogeneous SLC and MLC regions of the combined flash memory.