Fabrication of Nanocaved Surface and Immobilization of HeLa Cells for utilizing of Biochip

Mi Jung,Waleed Ahmed El-Said,Byung-Keun Oh,Jeong-Woo Choi 한국생물공학회 2008 한국생물공학회 학술대회 Vol.2008 No.10

Fabrication of the uniform CdTe quantum dot array on GaAs substrate utilizing nanoporous alumina masks

Mi Jung,이홍석,박홍이,임한조,모선일 한국물리학회 2006 Current Applied Physics Vol.6 No.6

Fabrication of quantum dot array (QDA) is attractive for applications in electronic and optoelectronic devices. The CdTe QDAshave potential applications in optoelectronic devices of visible range. One of the major challenges in fabricating QDAs is the uni-formity and reproducibility in size and spatial distribution. The uniformity and reproducibility of QDs can be improved by using thenanoporous alumina mask. The geometry of porous alumina is schematically represented as a close-packed array of columnar hex-agonal cells, each containing a central pore normal to the substrate. The well-ordered nanoporous alumina masks were able toobtain by two-step anodizing processes from aluminum in oxalic acid solutions at low temperature. The pore size, thickness, anddensity of nanoporous alumina mask can be controlled with the anodization voltage, time, and electrolyte. The CdTe QDAs onthe GaAs substrate was grown by molecular beam epitaxy method using the porous alumina masks. The temperature of substrateand source (Cd, Te) was an important factor for the growth of CdTe QDs on GaAs substrate. The CdTe QDAs of 80 nm dot sizewas fabricated; using the porous alumina masks (. 300 nm thickness) of pore diameter (80 nm) and density (. 1010 /cm2).

Application of Au Nanodot arrays to Nanobioplatform for Cell chip

Mi JUNG,Waleed AHMED EL-SAID,Byung-Keun OH,Jeong-Woo CHOI 한국생물공학회 2009 한국생물공학회 학술대회 Vol.2009 No.4

Immobilization of biomaterials on nanopatterned surface using nanoporous alumina for biodevices

Mi Jung,Sang-Uk Kim,오병근,최정우 한국물리학회 2009 Current Applied Physics Vol.9 No.2

Nanobiodevices have been required to improve their performance based on their small size. Nanopatterning itself is a very important process in the fabrication of nanobiodevices. Furthermore, there are many challenges in immobilization of biomaterials on a nanopatterned surface, since the performance of biodevices is highly affected by the state of immobilized biomaterials on the substrate. In this paper, we introduce a simple and versatile approach for nanopatterning biomaterials using nanoporous alumina. Uniform nanoconcave patterns were revealed on the surface of aluminum after the removal of nanoporous alumina formed during anodization. Au was deposited on the nanopatterned surface by sputtering. Cysteine-modified azurin was then immobilized on the Au nanopatterned surface by self-assembled layer formation without any organic linker materials. The samples were investigated by phase contrast imaging in tapping mode of atomic force microscopy. These methods can be used for nanopatterning various biomaterials for their application to biochip and other bioelectronic devices. Nanobiodevices have been required to improve their performance based on their small size. Nanopatterning itself is a very important process in the fabrication of nanobiodevices. Furthermore, there are many challenges in immobilization of biomaterials on a nanopatterned surface, since the performance of biodevices is highly affected by the state of immobilized biomaterials on the substrate. In this paper, we introduce a simple and versatile approach for nanopatterning biomaterials using nanoporous alumina. Uniform nanoconcave patterns were revealed on the surface of aluminum after the removal of nanoporous alumina formed during anodization. Au was deposited on the nanopatterned surface by sputtering. Cysteine-modified azurin was then immobilized on the Au nanopatterned surface by self-assembled layer formation without any organic linker materials. The samples were investigated by phase contrast imaging in tapping mode of atomic force microscopy. These methods can be used for nanopatterning various biomaterials for their application to biochip and other bioelectronic devices.

재현의 곤경, 설득의 서사 넘기 ― 5월 광주 서사의 현재와 과제 ―

김미정 ( Kim¸ Mi-jung ) 현대문학이론학회 2020 現代文學理論硏究 Vol.0 No.83

오늘날 재현을 질문하는 과정 자체가 아이러니하게도, 백래쉬와 경합하는 장이 되기도 한다. 재현에 대한 문제의식이 궁극적으로 어떤 언설과 연결될지 가늠하는 것도 중요해졌다. 본 논문은, 오늘날 재현의 윤리에 대한 질문이, 대중적 백래쉬의 정동과 교착하는 장면들에 대한 문제의식에서 출발했다. 최근 빈번히 발견되는 설득의 서사구조에서도 이런 우려를 생각해볼 수 있다. 이러한 서사구조는 백래쉬와 부정의 언설 앞에서 스스로를 증명해야 하는 강박과 관련될 것이다. 그런데 그 설득의 과정 자체가 재현에 대한 오인을 발생시키곤 한다.. 오늘날 서사 속 5월 광주 재현이 처한 곤경도 이러한 재현 일반의 문제와 연동한다. 1990년대 이후 제도화, 공식화한 언어와 상상력을 공회전하면서 5월 광주 재현은 부정, 백래쉬 앞에서 무력해지곤 한다. 이것은 같은 언어를 공유, 활용하고 있는 조건과 장의 문제이기도 하다. 이 글은, 영화 <김군>(2018), 최윤 소설 「저기 소리 없이 한 점 꽃잎이 지고」(1988)를 재독해하면서 이러한 5월 광주 서사의 현재와 과제를 가늠하고자 했다. This study started with the problem of the scenes where the question about the ethics of representation today intersects with the affect of popular backlash. Ironically, the process of questioning representation itself becomes a field to compete with opposing forces. Therefore, it is also necessary to carefully assess what kind of discourse will ultimately lead to the problem about representation today. This concern can also be considered in the narrative structure of persuasion, which is frequently discovered recently. This narrative structure will be related to the intention to prove oneself in front of backlash and denial. However, the process of persuasion itself causes misconceptions about representation. In today's narrative, the predicament of the May Gwangju uprising representation is also linked to this problem. Since the 1990s, the institutionalized and formalized language and imagination have been lethargy. This is also a matter of foundation and field sharing the same language. This article attempted to assess the present and tasks of the May Gwangju uprising narrative by reading the movie < Kim-Gun > (2018) and Choi Yoon's novel(1988).

환대산업종사자가 지각하는 유리천장현상이 직무태도에 미치는 영향 -자기유능감의 조절효과를 중심으로-

김미정 ( Kim¸ Mi-jung ),이연우 ( Lee¸ Yeonu ) 동북아관광학회 2021 동북아관광연구 Vol.17 No.3

환대산업은 타 업종에 비해 여성인력의 비중이 큰 산업으로서 여성노동력이 갖는 의미가 중요해지고 있는 상황임에도 불구하고, 아직까지도 많은 조직 내에서는 유리천장이 존재하고 있다. 본 연구의 목적은 환대산업종사자들이 지각하는 유리천장 인식이 직무태도에 어떠한 영향을 미치는지 살펴보고, 환대산업종사자들의 자기유능감이 유리 천장 인식과 직무태도 간의 조절역할을 하는지를 검증하고자 한다. 본 연구는 환대산업에 종사하는 구성원들을 대상으로 하여 조사하였으며, 총 280부가 최종분석에 이용되었다. 자료분석은 SPSS 22.0 통계프로그램을 사용하여 기술통계분석, 신뢰도분석과 요인분석, 회귀분석, 위계적 회귀분석을 실시하였다. 실증분석 결과, 유리천장 현상의 승진 요인은 직무만족과 이직의도에 유의한 영향을 미치고 있는 것으로 났으나, 직무몰입에는 유의한 영향을 미치지 않았다. 유리천장 현상의 보직 배치 요인은 직무몰입, 직무만족, 이직의도에 모두 유의한 영향을 미치는 것으로 나타났다. 그리고 자기유능감의 조절효과를 확인한 결과, 유리천장 현상의 승진요인과 직무몰입, 이직의도 간에는 조절효과가 유의하게 나타났으나 직무만족 간에는 조절효과가 유의하게 나타나지 않았다. 유리천장 현상의 보직배치 요인과 직무몰입, 직무만족, 이직의도 간에는 조절효과가 모두 유의하게 나타났다. 본 연구는 향후 환대산업 종사자들이 승진, 보직 배치에 있어 조직 내에서는 공정하고 투명한 인사 제도적 절차의 필요성을, 개개인에게서는 자기유능감을 높이는 방안을 통해 종사자의 유리천장 현상에 대한 수준을 낮추는 것이 필요하다는 점을 시사하고 있다. Although the hospitality industry has a larger proportion of female workers than other industries, the meaning of female labor is becoming important, many organizations still have glass ceilings. The purpose of this study is to examine how glass ceiling phenomena perceived by hospitality industry workers affect job attitudes and to verify that self-competence of hospitality industry workers plays a role in controlling between glass ceiling awareness and job attitudes. This study was conducted on members of the hospitality industry, and a total of 280 copies were used for the final analysis. Data analysis was performed using the SPSS 22.0 statistical program for descriptive statistical analysis, reliability analysis and factor analysis, regression analysis, and hierarchical regression. Empirical analysis showed that the promotion factor of late glass ceiling had a significant effect on job satisfaction and turnover, but it did not significantly affect job immersion. The reason for the placement of the glass ceiling tardiness was found to have a significant impact on job immersion, job satisfaction, and turnover. In addition, as a result of verifying the control effect of self-competence, the control effect was significant between promotion factors, job immersion, and turnover of the glass ceiling, but there was no significant control effect between job satisfaction. The adjustment effect was all significant between the factors of the placement of the glass ceiling tardiness, job immersion, job satisfaction, and intention to change jobs. This study suggests that future hospitality workers need to lower the level of recognition of the glass ceiling by increasing their self-competence in the organization's fair and transparent personnel system in terms of promotion and placement.

韓国人日本語学習者による終助詞「ね」の習得 ― 文法性判断テストとインタビューのデータから ―

朴美貞 ( Park¸ Mi-jung ),横山紀子 ( Yokoyama¸ Noriko ) 한국일어교육학회 2021 일본어교육연구 Vol.- No.56

本稿では、韓国人日本語学習者の終助詞「ね」の習得過程を調査するために、「情報のなわ張り理論」を参考に会話を作成し、「必須の『ね』」「任意の『ね』」および不適切な「ね」における文法性判断テストとフォローアップインタビューをレベル別学習者と日本語母語話者を対象に行なった。テストでは、文末に「ね」がついた「『ね』有り」版と「ね」がない「『ね』無し」版の2種を用意し、学習者の「ね」に関する認識の揺れを検証するために、次の要領で3回実施した後、インタビューを行った。(1)時間制限有りの「『ね』有り」版、(2)時間制限有りの「『ね』無し」版、(3)時間制限無しの「『ね』無し」版。時間制限の有無は、それぞれ学習者の直感的な認識と相対的に確かな知識を探ることを目的とした。その結果、最も確かな知識に基づいて解答されたはずの(3)において、話し手が十分な情報を持たない「任意の『ね』(情報-)」および不適切な「ね」で、正答率がレベル上昇に逆行する現象が見られた。また、上級の学習者には、3回のテストを通じた解答の揺れが大きいことも明らかになった。しかし、インタビューの分析結果では、上級の学習者は多様な「ね」の微妙なニュアンスを認識している傾向が見られたのに対して、下のレベルは「ね」の意味機能を単純に捉えている傾向が確認された。つまり、上級の学習者の正答率が低く、解答が揺れる要因としては、「ね」の複雑で多様な意味機能に気づいていること、その結果「ね」の文法性判断に迷いが生じたことが示唆された。 This paper analyzes the process of acquiring the final Japanese particle ne by different levels of Korean learners of Japanese through the theory of territory of information framework. Data of grammaticality judgement tests and interviews were gathered from learners as well as from native speakers of Japanese. Two versions of the tests were prepared with the same conversational scripts and were carried out three times in total, which was aimed to observe the stableness of their knowledge. In addition, the first two times of tests were with time pressure, and the third test was without it, which was to observe both of their implicit knowledge and explicit knowledge. The results of the third test, which was designed to measure explicit knowledge, shows the following. The percentage of correct answers of the advanced learners was lower than that of the learners of a lower level, for the type of optional ne in which the speaker does not have enough information, as well as for the inappropriate ne that should be omitted. It was also found out that the answers of the advanced learners to the three tests were less stable than learners of lower levels. The analysis of the interviews, however, shows that the advanced learners seem to capture subtle differences of various usages of ne than lower learners. The above-mentioned test results can be interpreted as caused by relatively precise but still uncertain perception of the advanced learners toward ne.

A S trategic Human Resource Management Approach in Chaebol Hotels

Mijung Kim(Mijung Kim),Yeonu Lee(Yeonu Lee) People&Global Business Association 2023 Global Business and Finance Review Vol.28 No.4

Purpose: The purpose of this study is to examine how strategic human resource management practices are enacted in chaebol hotels, and also to evaluate the relationship between the SHRM practices and organizational effectiveness as experienced by employees, regarding the concept of organizational justice. Design/methodology/approach: The questionnaire survey for employees served to test hypotheses which examine the relationship between SHRM and the influence of these HR practices on organizational effectiveness, using multi-regression analysis. This research encompasses a total of 450 responses collected from individuals employed at chaebol hotels in Seoul and Busan. Findings: This study revealed that chaebol hotels hired competent employees who had language capabilities, used appearance as a selection criterion, and ensured that sophisticated selection methods were well established through the HR systems of numerous subsidiary companies. Employees consider the perceived injustices in the recruitment and selection process and the perceived unfairness in promotions. Research limitations/implications: All findings support the concept that the best practice, driven by collectivism, employment legislation, trade unions, and financial considerations, plays a significant role in managing HRM in chaebol hotels. This study contributes a new SHRM framework by integrating a combination of best fit, based on quality enhancement strategy, and best practices tailored to the specific organization. Originality/value: This study contributed to explore the SHRM framework for the Chaebol hotel sector with regard to providing both high quality of service and also a high price policy. This study provides guidelines for efficient SHRM to managers and practitioners who operate deluxe hotels and offers an essential material to gain a better understanding of a new SHRM framework in service organization.

Effect of Lactobacillus dominance modified by Korean Red Ginseng on the improvement of Alzheimer's disease in mice

Mijung Lee,So-Hee Lee,Min-Soo Kim,안광성,김만호 고려인삼학회 2022 Journal of Ginseng Research Vol.46 No.3

Gut microbiota influence the central nervous system through gut-brain-axis. They alsoaffect the neurological disorders. Gut microbiota differs in patients with Alzheimer's disease (AD), as apotential factor that leads to progression of AD. Oral intake of Korean Red Ginseng (KRG) improves thecognitive functions. Therefore, it can be proposed that KRG affect the microbiota on the gut-brain-axis tothe brain. Methods: Tg2576 were used for the experimental model of AD. They were divided into four groups: wildtype (n ¼ 6), AD mice (n ¼ 6), AD mice with 30 mg/kg/day (n ¼ 6) or 100 mg/kg/day (n ¼ 6) of KRG. Following two weeks, changes in gut microbiota were analyzed by Illumina HiSeq4000 platform 16Sgene sequencing. Microglial activation were evaluated by quantitative Western blot analyses of Iba-1protein. Claudin-5, occludin, laminin and CD13 assay were conducted for Blood-brain barrier (BBB)integrity. Amyloid beta (Ab) accumulation demonstrated through Ab 42/40 ratio was accessed by ELISA,and cognition were monitored by Novel object location test. Results: KRG improved the cognitive behavior of mice (30 mg/kg/day p < 0.05; 100 mg/kg/day p < 0.01),and decreased Ab 42/40 ratio (p < 0.01) indicating reduced Ab accumulation. Increased Iba-1 (p < 0.001)for reduced microglial activation, and upregulation of Claudin-5 (p < 0.05) for decreased BBB permeability were shown. In particular, diversity of gut microbiota was altered (30 mg/kg/day q-value<0.05),showing increased population of Lactobacillus species. (30 mg/kg/day 411%; 100 mg/kg/day 1040%). Conclusions: KRG administration showed the Lactobacillus dominance in the gut microbiota. Improvement of AD pathology by KRG can be medicated through gut-brain axis in mice model of AD.

The Effect of the VR (Virtual Reality) Usability of Safety Training for Airline Flight Attendants on Perceived Learning, Safety Behaviors, and Satisfaction

Mijung Kim,Yeonu Lee The International Academy of Global Business and T 2023 The International Academy of Global Business and T Vol.19 No.6

Purpose - The purpose of this study is to examine the VR (Virtual Reality) usability of the newly implemented safety VR training in the airline sector and to investigate the relationships and effects among perceived learning, safety behaviors, and satisfaction. Design/Methodology/Approach - In this study, hypotheses concerning the relationship between VR usability and perceived learning, safety behaviors, and satisfaction were examined through multiple regression analysis, utilizing data from a survey of 423 employees within a domestic airline implementing VR training in South Korea. Findings - Airlines are a dynamic field wherein there is a continuous trend of ongoing technological advancements and the development and application of digital features. In response to these changes, airlines have been introducing VR-based safety training methods. This study confirmed that flight attendants that underwent VR training assessed their perception of VR usability, contributing to performance in safety tasks and expressing satisfaction with the outcomes. VR training not only offers a realistic and immersive experience that depicts actual scenarios but also encourages active participation among employees. Research Implications - This study provides results that overcome the challenges of realistically reproducing emergency situations in training environments by introducing training based on VR. This study anticipates that the findings will offer valuable insights for fields attempting to utilize VR for training purposes.