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Language Learning Autobiographies, Identity Texts, and Critical Teacher Education
Shin Hyunjung,In Chull Jang 한국영어교육학회 2023 ENGLISH TEACHING(영어교육) Vol.78 No.1
This paper explores possibilities of using language learning autobiographies as a form of identity texts in order to produce suggestions for critical teacher education. Specifically, we examined what insights we might gain by reframing Korean pre-service teachers’ autobiographies as a form of identity texts to develop reflective teachers, who affirm their identities and language learning histories. We thematically analyzed autobiographical reflection papers on English learning experiences of 73 undergraduate students enrolled in a compulsory elementary English education course at a public university in South Korea. The analysis revealed the predominance of referral to English private education experiences and a sense of linguistic insecurity felt by these pre-service teachers, who would later teach in public schools. Based on these findings, we provide suggestions for critical teacher education to foster critical language awareness and identity investment for the students. We conclude that language learning autobiographies, while incorporating characteristics of identity texts, might be a useful tool for critical pedagogies.
Ultra-thin and isolated dots in polycrystalline lead zirconate titanate films
Hyunjung Shin,Bongki Lee,Chanhyung Kim,Seung-Hyun Kim IEEE 2006 and Frequency Control Vol.53 No.12
<P>Size effects with critical thickness or minimum volume for ferroelectricity are of importance in the application of polycrystalline PZT thin films as future memory devices and as storage media. Isolated dots of perovskite phases in the matrix of pyrochlore were synthesized by isothermal annealing through transformation from amorphous to perovskite. Control of the transformation kinetics allows us to produce the isolated ferroelectric dots with a diameter of 50 nm. Domain structure of the isolated dots is also studied by piezoresponse force microscopy. As prepared, all isolated dots contain perpendicularly polarized monodomains. Domain structures and switching behaviors of the isolated dots are similar to those of the single crystalline PZT films. Polycrystalline PZT films with a thickness of 50 nm were also investigated. They show excellent piezoresponse properties and switching behaviors. Ultra-thin polycrystalline PZT films can play a major role in the application of future ferroelectric memories and field-effect transistors as well as for storage media using the local probe technique</P>
k-NN based Pattern Selection for Support Vector Classifiers
Shin, Hyunjung,Cho, Sungzoon 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(1)
we propose a k-nearest neighbors(k-NN) based pattern selection method. The method tries to select the patterns that are near the decision boundary and that are correctly labeled. The simulations over synthetic data sets showed promising results: (1) By converting a non-separable problem to a separable one, the search for an optimal error tolerance parameter became unnecessary. (2) SVM training time decreased by two orders of magnitude without any loss of accuracy. (3) The redundant SVs were substantially reduced.
KOREAN CANADIAN STUDENT REFLECTIONS ON IDENTITY FROM TWO CANADIAN CITIES
Shin Hyunjung,Kim Ann H. 한국캐나다학회 2022 Asia-Pacific Journal of Canadian Studies (APJCS) Vol.28 No.2
This paper presents reflections of Korean Canadian students from two Canadian cities on their sense of identity. Drawing on data from a larger exploratory study of anti-Asian experiences of Korean university students from four different sites in North America, we report on a comparative analysis of identity formation among Korean students in Toronto, a large metropolis, and in Saskatoon, a medium-sized metropolis. Specifically, the analysis focuses on the ways in which fourteen Korean students’ identity construction is fluid and dynamic and argues for a more blended, interactive, and relational conceptualization. After presenting a brief introduction and conceptual framework and literature review, the paper discusses data and methods followed by a qualitative analysis of the focus group discussions from the two cities. The paper concludes with a discussion of the study’s implications for a more nuanced understanding of Korean Canadian identities in the contemporary period.
Data Mining for BioMedical Informatics
Hyunjung (Helen) Shin(신현정) 한국경영과학회 2010 한국경영과학회 학술대회논문집 Vol.2010 No.10
Data mining is set to play an important role in tackling the data overload in Biomedical informatics. The rapidly increasing amount of data generated by hospital (patient, clinical, or management) database and biomedical devices, or retrieved from archives motivates the development of data mining system able to handle, analyze, and understand it automatically. Data mining system supporting medical, managerial, and science theoretical decisions are attracting a lot of research work, and the benets include improved health care quality, reduced operating costs, and better insight into bio- and medical- data from gene-finding to new drug design & development. In this talk, we walk through several case studies of disease diagnosis & prognosis, hospital fraud detection, protein function prediction, etc., following basic understanding on data mining and biomedical domain.
( Hyunjung Hwang ),( Ji Young Shin ),( Kyu Ree Park ),( Jae Ouk Shin ),( Kyoung Hwan Song ),( Joonhyung Park ),( Jeong Woong Park ) 대한결핵 및 호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.4
Background: The adverse effects of the phosphodiesterase-4 inhibitor roflumilast, appear to be more frequent in clinical practice than what was observed in chronic obstructive pulmonary disease (COPD) clinical trials. Thus, we designed this study to determine whether adverse effects could be reduced by starting roflumilast at half the dose, and then increasing a few weeks later to 500 μg daily. Methods: We retrospectively investigated 85 patients with COPD who had taken either 500 μg roflumilast, or a starting dose of 250 μg and then increased to 500 μg. We analyzed all adverse events and assessed differences between patients who continued taking the drug after dose escalation and those who had stopped. Results: Adverse events were reported by 22 of the 85 patients (25.9%). The most common adverse event was diarrhea (10.6%). Of the 52 patients who had increased from a starting dose of 250 μg roflumilast to 500 μg, 43 (82.7%) successfully maintained the 500 μg roflumilast dose. No difference in factors likely to affect the risk of adverse effects, was detected between the dose-escalated and the discontinued groups. Of the 26 patients who started with the 500 μg roflumilast regimen, seven (26.9%) discontinued because of adverse effects. There was no statistically significant difference in discontinuation rate between the dose-escalated and the control groups (p=0.22). Conclusion: Escalating the roflumilast dose may reduce treatment-related adverse effects and improve tolerance to the full dose. This study suggests that the dose-escalated regimen reduced the rate of discontinuation. However, longer-term and larger-scale studies are needed to support the full benefit of a dose escalation strategy.
A scanning probe mounted on a field-effect transistor: Characterization of ion damage in Si
Shin, Kumjae,Lee, Hoontaek,Sung, Min,Lee, Sang hoon,Shin, Hyunjung,Moon, Wonkyu Elsevier 2017 Micron Vol.101 No.-
<P><B>Abstract</B></P> <P>We have examined the capabilities of a Tip-On-Gate of Field-Effect Transistor (ToGoFET) probe for characterization of FIB-induced damage in Si surface. A ToGoFET probe is the SPM probe which the Field Effect Transistor(FET) is embedded at the end of a cantilever and a Pt tip was mounted at the gate of FET. The ToGoFET probe can detect the surface electrical properties by measuring source-drain current directly modulated by the charge on the tip. In this study, a Si specimen whose surface was processed with Ga+ ion beam was prepared. Irradiation and implantation with Ga+ ions induce highly localized modifications to the contact potential. The FET embedded on ToGoFET probe detected the surface electric field profile generated by schottky contact between the Pt tip and the sample surface. Experimentally, it was shown that significant differences of electric field due to the contact potential barrier in differently processed specimens were observed using ToGOFET probe. This result shows the potential that the local contact potential difference can be measured by simple working principle with high sensitivity.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We propose a method for characterization of ion damage in Si using a Tip-on-Gate of Field-Effect Transistor (ToGoFET) probe. </LI> <LI> We fabricated a ToGoFET probe embedded with an ion-implanted metal–oxide–semiconductor FET (MOSFET) for efficient transduction of the electrical signal at the probe tip. </LI> <LI> The ToGoFET probe can detect the surface electrical properties by measuring source-drain current directly modulated by the charge on the tip. </LI> <LI> The FET embedded on ToGoFET probe detected the surface electric field profile generated by schottky contact between the Pt tip and the sample surface. </LI> <LI> This result shows the potential that the local contact potential difference can be measured by simple working principle with high sensitivity. </LI> </UL> </P>