Examining Generalizability of Kang's (1999) Model of Structural Relationship between ESL Learning Strategy Use and Language Proficiency

Kang, Sung-Woo 한국영어어문교육학회 2001 영어어문교육 Vol.7 No.2

The present study examined whether Kang's (1999) model of the relationships among language learning strategy use and language proficiency for the Asian students could e applied to a more heterogeneous group. In Kang's study, he collected information of language learning strategies of 957 foreign students learning English as a second language in American colleges through a questionnaire. He also measured the subjects' language proficiency with the Institutional Testing Program TOEFL(Test of English as a Foreign Language). This study analyzed the same data with out the limitation of cultural identity. Structural equation modeling was used to model the relationships among strategy use and language proficiency, Then, the model of the present study was descriptively compared with Kang's (1999) model for the Asian students. The overall flow of the relationship paths appeared to vary very little across the two models, which would have indicated that the generalizability of Kang's (1999) model could be extended more than originally examined. (156)

Hydrogen Behavior in Ti-Added Reduced Activation Ferritic-Martensitic Steels

Kang‑Mook Ryu,Dae Geon Lee,Joonoh Moon,Chang‑Hoon Lee,Tae‑Ho Lee,Jae Sang Lee,Dong‑Woo Suh 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.3

Hydrogen behavior and corresponding mechanical degradation were examined in TaTi-RAFM and EUROFER97 steels. Increased Ta content with Ti addition decelerates the hydrogen diffusion but increases the solubility in the lattice. It ismainly led by the higher fraction of Ta-rich MC carbides and dislocation density in TaTi-RAFM steel. Overall activationenergy of hydrogen trapping of investigated steels is evaluated to be 25.3 ~ 25.6 kJ/mol in the tempered condition. The activationenergy increases to nearly 30 kJ/mol when the steels are re-austenitized and quenched. Higher activation energy withincreased dislocation density indicates that the dislocation provides for trap site with higher activation energy than Ta-richMC carbide. Mechanical degradation by hydrogen with respect to the yield strength, tensile strength and uniform elongationcould not be observed in all investigated steels. The presence of hydrogen only has influence on the loss of post-uniformelongation. For a given charging time, the loss of post-uniform elongation is more remarkable in TaTi-RAFM steel due tothe larger hydrogen uptake.

Examining Generalizability of Kang's (1999) Model of Structural Relationships between ESL Learning Strategy Use and Language Proficiency

강성우,Kang, Sung-Woo The English Teachers Association in Korea 2002 영어어문교육 Vol.7 No.2

The present study examined whether Kang's (1999) model of the relationships among language learning strategy use and language proficiency for the Asian students could be applied to a more heterogeneous group. In Kang's study, he collected information of language learning strategies of 957 foreign students learning English as a second language in American colleges through a questionnaire. He also measured the subjects' language proficiency with the Institutional Testing Program TOEFL (Test of English as a Foreign Language). This study analyzed the same data without the limitation of cultural identity. Structural equation modeling was used to model the relationships among strategy use and language proficiency. Then, the model of the present study was descriptively compared with Kang's (1999) model for the Asian students. The overall flow of the relationship paths appeared to vary very little across the two models, which would have indicated that the generalizability of Kang's (1999) model could be extended more than originally examined. (156)

Piezoelectric Materials: All‐Solution‐Processed Flexible Thin Film Piezoelectric Nanogenerator (Adv. Mater. 45/2012)

Chung, Sung Yun,Kim, Sunyoung,Lee, Ju‐,Hyuck,Kim, Kyongjun,Kim, Sang‐,Woo,Kang, Chong‐,Yun,Yoon, Seok‐,Jin,Kim, Youn Sang WILEY‐VCH Verlag 2012 ADVANCED MATERIALS Vol.24 No.45

<P>An all‐solution‐processed flexible piezoelectric nanogenerator, composed of polycrystalline ZnO thin film and functional polymer layers such as P3HT/PCBM and PEDOT:PSS, generates energy through a mechanical rolling and muscle stretching system. On page 6022, Youn Sang Kim, Sang‐Woo Kim, and co‐workers show that this all‐solution‐processed nanogenerator is feasible as a piezoelectric patchable device and is promising for use in future energy harvesters such as wearable human patches and mobile electronics. </P>

RE-4 : Corifollitropin alfa versus daily recombinant fsh treatment for controlled ovarian stimulation in poor responders

( Chung Hoon Kim ),( Jei Won Moon ),( Jin Young Min ),( Jun Woo Ahn ),( Sung Hoon Kim ),( Hee Dong Chae ),( Byung Moon Kang1 ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-

목적: To compare the effect of long-acting recombinant FSH (rFSH), corifollitropin alfa with daily rFSH administered during 1st 7days of controlled ovarian stimulation (COS) using GnRH antagonist multiple dose protocol (MDP) in poor responders undergoing IVF/intracytoplasmic sperm injection (ICSI). 방법: In this prospective randomized study total of 90 poor responders who were scheduled for IVF/ICSI were enrolled and divided into the corifollitropin alfa group (study group) or the daily rFSH group (control group). The diagnosis of poor responder was based on the Bologna criteria of the 2011 ESHRE consensus. In all subjects, GnRH antagonist MDP was used for COS. 결과: There were no differences in patients` characteristics between the two groups. Duration of COS was comparable between the study and control groups. The numbers of oocytes retrieved and grade I or II embryos were also similar in the two groups. However, the number of mature oocytes was higher in the study group with a borderline significance (p< .07) and the ratio of mature oocytes among total oocytes retrieved was significantly higher in the study group of 78.6 ± 13.0%, compared with 61.2 ± 16.0% in control group (p< .001). There were no differences in the clinical pregnancy rate per cycle initiated, embryo implantation rate and miscarriage rate between the two groups. 결론: Corifollitropin alfa is at least as effective as daily rFSH treatment for COS using GnRH antagonist MDP, and may improve the synchrony of follicular development in poor responders undergoing IVF/ICSI. Therefore, corifollitropin alfa may be a feasible, patient-friendly alternative for poor responders.

하악 제3대구치의 존재여부 및 매복양상이 하악 우각부 골절과 과두 골절의 발생에 미치는 영향

이영주(Young-Joo Lee),송윤정(Yun-Jung Song),홍순민(Soon-Min Hong),채상식(Sang-Sik Chae),강현우(Hyeon-Woo Kang),최동주(Dong-Ju Choi),박준우(Jun-Woo Park) 대한치과의사협회 2012 대한치과의사협회지 Vol.50 No.9

Purpose : This study evaluated the impact of the presence and aspect of mandibular third molars to the mandible angle fracture or condyle fractures in Korean. Materials and Methods : A retrospective study was designed for patients attending the division of Oral and Maxillofacial Surgery, Kang-dong sacred heart hospital for treatment of mandibular fracture from January 2006 to September 2010. The primary variable was the presence of mandibular third molar and the secondary variable was the aspects of third molar impaction. Mandibular third molars were classified by the impaction depth and the available space as Pell & Gregory system. Outcome variables were the presence of mandibular angle fracture or condyle fracture. Also the source of trauma, age, sex were studied. Hospital charts, radiographs were used for study. Statistic analysis was done with descriptive statistics, the X2-test, linear-bylinear association. P value under 0.05 was considered significant statistically. Results : The number of involved patients was 86. The ratio of male to female patients was about 9:1 for angle fracture and 7:3 for condyle fracture. The most common source of trauma was assault for angle fracture and fall down for condyle fracture. The presence of mandibular third molar increased frequency of angle fracture and decreased condyle fracture with larger impaction depth. But available space of mandibular third molar did not show high association with angle or condyle fractures. Conclusion : Preventive extraction of mandibular third molar is recommended for patients with high risk of angle fracture. Male patients at their third decade or martial artists, police officer could be the case. But it is not recommended for patients with low risk of angle fracture and high risk of condyle fracture relatively. Elder female patients without any symptom on their third molar could be the case.

Construction of Stably Transformed Bm 5 Cells by Using Autographa californica Nuclear Polyhedrosis Virus IE 0 Gene

Cho, Eun Sook,Jin, Byung Rae,Sohn, Hung Dae,Choi, Kwang Ho,Kim, Soung Ryul,Kang, Seok Woo,Yun, Eun Young,Kim, Sang Hyun,Kim, Keun Young,Je, Yeon Ho,Kang, Seok Kwon 한국잠사학회 1998 한국잠사곤충학회지 Vol.40 No.2

To construct transfurmed Bm5 cells, Autographa californica nuclear polyhedrosis virus(AcNPV) IE1 gene, an immediate early viral gene was firstly used in this study. AcNPV IE1 gene, which shares on 95.3% nucleotide sequence homology with Bombyx mori nuclear polyhedrosis virus (BmNPV) IE1 gene, was isolated and cloned into pBluescript. Neomycin gene from pKO-neo was inserted under the control of the IE1 promoter to yield pAcIE1-neo. The plasmid pAcIE1-neo was transfected into Bm5 or Sf9 cells, and neomycin-resistant cells were selected in TC100 medium containing 10% fetal bovine serum (FBS) and 1 mg/ml G4l8 for two weeks. Individual clones were picked and each was amplified for further characterization. The genomic DNA from neomycin-resistant cells was isolated and characterized by PCR using AcNPV IEI gene-specific primers and by Southern blot analysis using neomycin gene probe. We concluded that AcNPV IE1 gene was functional in B. mori-derived Bm5 cells as well as Spodoptera fugjprrda-derived Sf9 cells to produce stably-transformed insect cells

Peptide Nucleic Acid-Mediated Aggregation of Reduced Graphene Oxides and Label-Free Detection of DNA Mutation

Kang, Taegyeong,Choi, Hoon,Joo, Sang-Woo,Lee, So Yeong,Yoon, Kyong-Ah,Lee, Kangtaek American Chemical Society 2014 The Journal of physical chemistry B Vol.118 No.23

<P>We have investigated peptide nucleic acid (PNA)-mediated aggregation of reduced graphene oxide (rGO) sheets. Addition of PNA into suspension of rGOs resulted in aggregation of rGOs, which could be easily detected with the naked eye. To elucidate the mechanism of rGO aggregation, we monitored the reaction by transmission electron microscopy, zeta potential measurement, and UV–vis spectroscopy. Our findings suggest that PNA adsorbed on the rGO surface and then acted as a cross-linker to induce aggregation. We also tested the effects of different nucleic acids on rGO aggregation and found that not only the single-stranded DNA, but also the PNA-DNA complex, could stabilize the suspension against aggregation through electrostatic repulsion. Based on our understanding on rGO aggregation, we attempted to detect mutations in epidermal growth factor receptor (EGFR) by designing PNA probe to be complementary to the mutant type DNA sequence. Our results showed that PNA-mediated rGO aggregation could successfully be used to detect mutations in EGFR with high selectivity and sensitivity.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcbfk/2014/jpcbfk.2014.118.issue-23/jp501820j/production/images/medium/jp-2014-01820j_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp501820j'>ACS Electronic Supporting Info</A></P>

Dietary assessment and the development of asthma in Korean adolescents and adults

Kang, Sung-Yoon,Song, Woo-Jung,Kim, Min-Hye,Kim, Sae-Hoon,Cho, Sang-Heon,Chang, Yoon-Seok,Yang, Min-Suk Wiley (Blackwell Publishing) 2018 Allergy Vol.73 No.11

A Phase 1 Study Using Autologous Natural Killer Cells in Patients with HAIC-Hepatocellular Carcinoma

( Sung Bum Cho ),( Chung Hwan Jun ),( Sung Kyu Choi ),( Woo Kyun Bae ),( Je Jung Lee ),( Yang Jun Kang ),( Cheol Kyun Cho ),( Yang Seok Ko ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1

Aims: Natural killer (NK) cell-based immunotherapy has recently been tried with advances of understanding the role of immune defense against hepatocellular carcinoma (HCC). To improve NK cells therapy, we focused to increasing delivery of NK cells and synergic effect combined with hepatic arterial infusion chemotherapy (HAIC). Methods: We did a prospective, open label, phase 1 trial of the safety and efficacy of autologous NK cells through hepatic arterial infusion as sequential therapy after HAIC in advanced HCC patients. Between March 2016 and July 2017, 11 patients were included who showed favorable response more than stable disease (SD) after 2 sessions of HAIC in advanced HCC patients with child A. A total 4 sessions of HAIC were performed the protocols of infusion of cisplatin (25/m2) and 5-fluorouracil (750/m²) for 4 days every 3-4 weeks interval. The peripheral blood mononuclear cells of patients by leukapheresis were ob-tained after 3^rd HAIC and NK cells were expanded for 2 weeks under Current Good Manufacturing Practices (cGMP). Patients received planned dosage of NK cells through chemoport into hepatic artery for 5 days after 4^th HAIC (3 patients; 2.5x108, 3 patients; 5x10⁸, 5 patients; injection of 10x10⁸ NK cells). The primary end point was safety of NK cell injection; secondary endpoint included objective response rate (modified Response Evaluation Criteria In Solid Tumors), time to progression, dura-tion of response and immunologic efficacy. Results: Any adverse events of NK cells injection were none according to dosage. An objective response was observed in 7 patients (63.6%) included three complete responses and four partial responses. Stable disease was observed in 2 patients and progressive disease was in 2 patients and thus disease control rate was 81.8%. The mean duration of time to progression was 9.7±5.3 month and duration of response without chemotherapy was 6.1±5.2 month. The newly metastatic lesion was occurred in 3 patents (27.2%; lymph node 1 patients, Lung 2 patients). Two patients were died by tumor progression and others were still alive. The increasing immunologic response was observed in 5 patients (55 %) to evaluate cytotoxicity and NK cell proportion of peripheral mononuclear cells after NK cell injection. Conclusions: The HAIC and NK cells immunotherapy is safe and effective treatment in the advance HCC patient with favorable liver function. The additional studies are urgently required to establish the new novel treatment.