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A Verification of Fault Tree for Safety Integrity Level Evaluation
Younghee Lee,Jinkyung Kim,Junghwan Kim,Il Moon 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This study focuses on a novel approach which automatically proves the correctness and completeness of fault trees based on a formal model by model checking. This study represents that the model checking technique is useful when validating the correctness of informal safety analysis such as FTA. The benefits of this study are that it provides the probability of formally validating FTA by proving correctness and completeness of the fault trees. In addition to this benefit, it is possible that the CTL technique proves the FTA based SIL.
THE ROLE OF CUSTOMER SERVICE CENTER TO BUILD LOYALTY RELIATIONSHIP
Younghee Lee,JungKun Park,Ren Tianbao 서비스마케팅학회 2016 서비스마케팅학회 학술대회 발표논문집 Vol.2016 No.5
With the recent advancements in information and communications technology, e-contact centers have taken on a new role in the retail world. They have become an essential gateway to retailers’ relationship with their customers. The use of consumer-trusted advanced communication technologies in e-contact centers has been found to play an important role in the creation of customer loyalty. The purpose of this study was to investigate the effect of consumer trust in information and communication technology on the trust, satisfaction, and loyalty that customers develop with e-contact centers and to provide an integrated model to assess the effect of a trustsatisfaction- loyalty linkto e-contact centers on the formation process of their loyalty to retailers. The results suggest that trust in communication technology plays an important role in the formation process of customer trust, satisfaction and loyalty within e-contact centers, and that customer trust, satisfaction, and loyalty to e-contact centersare linked to their loyalty to retailers.
A Study on Psychological Change of Depressed Children in a Psychotherapy Program with Loess
Lee Younghee,Lee Sangdo 국제온돌학회 2016 International Journal of Ondol Vol.9 No.2
The purpose of this study is to develop a psychotherapy program using loess that can help to reduce depression and daily life stress and to improve self - esteem. When depression begins in childhood, it is confirmed that the recurrence rate is very high in adulthood. There was no significant change in depression as a physical symptom with the use of loess, but it was significantly decreased in negative depression symptom that derogatory oneself, and significant decrease in loss of interest, behavioral problems, and depressed emotions. This suggests that psychological and social intervention for children with depression can be effectively promoted and depression can be reduced by suggesting appropriate psychotherapeutic interventions for children to cope with depression.
Application of Distance Education for Mathematics of Junior High School
Lee, Younghee 한국수학교육학회 2002 수학교육연구 Vol.6 No.2
Recently a new type of educational method through the internet, distance education, has been developed with technology development. To find out any complement between distance education and traditional in-class education, a series of study with junior high school mathematics were conducted. Both distance education and in-class education have merits and shortcomings. Some advantages with distance education shown from the study can be used for complement to in-class education depending on the contents and subjects. Distance education in mathematics education can be a good turning point for future education.
The hallmarks of L2 writing viewed through the prism of translation universals
Younghee Cheri Lee 경희대학교 언어정보연구소 2018 언어연구 Vol.35 No.S
Rooted in a perception that second language (L2) writing bears neither resemblance with nontranslated counterparts nor relation to translation, this article explores the untested terrain of revealing lexical and textual attributes unique to L2 writers texts, thus identifying their linguistic qualities from the angle of translation universals. Setting plausible parameters to discern translational instances related to lexical and syntactical choices, this article argues that idiosyncratic properties shared by translated English may typify the hallmarks of L2 writing produced by non-anglophone scholars in English disciplines. By compiling the comparable corpora of English journal abstracts consisting of 638,764 tokens, it is shown how salient translational features arise in expert L2 writers texts in compliance with corpus linguistics. Kruskal-Wallis tests are applied to evaluate linguistic indices that make Korean scholars L2 writing distinct from native scholars’ original writing. On a substantial level, a general presumption on the interrelatedness between expert L2 writers English and translational English has turned out to be warranted, meaning that Korean scholars L2 writing can be marked by universals of simplification, normalization, explicitation, and convergence in their broad outlines. It can be deducible from the findings that regardless of L2 proficiency levels, second language writers may be destined to go through a ‘mental translation as an inescapable cognitive mechanism during the L2 writing process, which in turn renders translational manifestations pervasive in the ‘product’ of L2 writing. The terminal pedagogical aim building metacognitive awareness to be mindful of second language processing, thus, this article concludes that expert L2 writers need to equip themselves with metacognitive strategies, thereby being consciously and explicitly aware of what to avoid and what to accept during the process of L2 writing entailing mental translation.
Lee, Hyukmin,Unemo, Magnus,Kim, Hyo Jin,Seo, Younghee,Lee, Kyungwon,Chong, Yunsop Oxford University Press 2015 The Journal of antimicrobial chemotherapy Vol.70 No.9
<P>Objectives: Antimicrobial resistance (AMR) in Neisseria gonorrhoeae is a major concern globally; however, no comprehensive AMR data for gonococcal isolates cultured after 2006 in Korea have been published internationally. We determined the susceptibility of N. gonorrhoeae isolates cultured in 2011-13, the mechanism of extended-spectrum cephalosporin (ESC) resistance and the molecular epidemiology of gonococcal strains in Korea. Methods: In 2011-13, 210 gonococcal isolates were collected in Korea and their AMR profiles were examined by the agar dilution method. The penA, mtrR, penB, ponA and pilQ genes were sequenced in 25 isolates that were resistant to ESCs and 70 randomly selected isolates stratified by year. For molecular epidemiology, N. gonorrhoeae multiantigen sequence typing and MLST were performed. Results: None of the N. gonorrhoeae isolates was susceptible to penicillin G and most were resistant to tetracycline (50%) and ciprofloxacin (97%). The rates of resistance to ceftriaxone, azithromycin, cefpodoxime and cefixime were 3%, 5%, 8% and 9%, respectively. However, all isolates were susceptible to spectinomycin. Twenty-one (84%) of the 25 ESC-resistant isolates contained the non-mosaic PBP2 XIII allele; however, the remaining 4 (16%) possessed the mosaic PBP2 X allele, which has been previously associated with ESC resistance including treatment failures. Conclusions: In Korea, susceptibility to spectinomycin remains high. However, the recent emergence of ESC-resistant N. gonorrhoeae strains, including strains possessing the PBP2 mosaic X and non-mosaic XIII alleles, is a major concern and enhanced AMR surveillance is necessary to prevent transmission of these strains.</P>
White Light Emission Using Heteroleptic Tris-Cyclometalated Iridium (III) Complexes
YoungHee Lee,Gui Youn Park,Young Sik Kim 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.6
The synthesis and photophysical study of efficient phosphorescent heteroleptic tris-cyclometalated iridium (III) complexes for white organic light-emitting devices (WOLEDs) are reported. In order to obtain a large broad band, we designed and prepared Ir(dfppy)$_2$(pq) and Ir(pq)$_2$(dfppy), where dfppy and pq are 2-(2,4-difluorophenyl) pyridine and 2-phenylquinoline, respectively. The emission wavelengths and the lifetimes of Ir(dfppy)$_2$acac and Ir(pq)$_2$acac (acac = acetyl acetonate) were reported as 469 nm and 596 nm, and 1.6 $\mu$s and 2.0 $\mu$s, respectively. A reasonably similar phosphorescent lifetime is crucial for white light emission materials. The luminescence mechanism is determined by using the decay times of two different cyclometalated (C$\hat{~}$N) ligands. As similar phosphorescent lifetimes are possible for luminescence in two ligands at the same time, the emission wavelengths of Ir complexes have large broad peaks, leading a white color. Our experimental results provide evidence that the absorption of Ir complexes occurs at each ligand upon excitation. Thus, the excitation energy causes blue and orange colors to be emitted in each ligand of the complex. To realize this idea, we synthesized an iridium complex having two different ligand structures and theoretically calculated the complex by using a computational method.\\