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Hojeong Seok(Hojeong Seok) J-INSTITUTE 2022 International Journal of Military Affairs Vol.7 No.2
Purpose: The Armed Forces Nursing Academy is a special-purpose university that trains nursing officers and has a unique curriculum. In Particular, regarding the English curriculum, KAFNA has TOEIC-centered general Eng-lish education and offers practical English education for military nursing. This study aimed to improve the effec-tiveness of English education at the Armed Forces Nursing Academy. The researcher identified the relationship between cadets' TOEIC scores and military nursing practical English grades, and this study, based on the rela-tionship, proposed a developmental plan for the English curriculum. Method: In this study, to confirm the relationship between general English proficiency and military nursing English skill, this study analyzed 4years of accumulated TOEIC scores and military nursing practical English grades of 298 cadets, including graduates 60th ~ 63rd year of KAFNA to find a relationship. First, the correlation between TOEIC test scores and military nursing practical English grades was examined, and a T-test was used to determine whether there were differences in military nursing English proficiency according to TOEIC test scores. Results: As a result of examining TOEIC scores and military nursing practical English grades of 298 cadets in four years, the 60th year showed a moderate correlation between the TOEIC score and the military nursing Eng-lish grade, and the 61st~63th year showed a weak correlation. Furthermore, in the case of the 60th~62th year, it was found that there was a difference in the military nursing English score according to the TOEIC score, but there was no difference in the 63rd grade. Conclusion: It seemed that TOEIC scores were only partially related to military nursing practical English grades. Therefore, to communicate in the situation of military nursing practice, which has a specialized purpose, it is necessary to increase the proportion of military nursing practice English learning. In addition, complementary methods like increasing offered credits or motivating cadets should provide so that they can take an interest in learning English for military nursing practice.
Yu, Hojeong,Oh, Youngjin,Kim, Soowon,Song, Seok Ho,Kim, Donghyun Optical Society of America 2012 Optics letters Vol.37 No.18
<P>Metallic wires can discriminate light polarization due to strong absorption of electric fields oscillating in parallel to wires. Here, we explore polarization-based biosensing of DNA hybridization in situ by employing metal target-conjugated nanoparticles to form a wire-grid polarizer (WGP) as complementary DNA strands hybridize. Experimental results using gold nanoparticles of 15 nm diameter to form a WGP of 400 nm period suggest that polarization extinction can detect DNA hybridization with a limit of detection in the range of 1 nM concentration. The sensitivity may be improved by more than an order of magnitude if larger nanoparticles are employed to define WGPs at a period between 400 and 500 nm.</P>
Kang, Hojeong,Chris Freeman,Seok-Soon Park 한국하천호수학회 2006 생태와 환경 Vol.39 No.4
A suite of extracellular enzyme activities involved in organic carbon decomposition were determined in three northern peatlands (a bog, a fen, and a swamp) over a 12 month period along with trace gas (CO2 and N2O) flux and DOC dynamics in the wetlands. The activities varied 0.008-0.066 μmole g-1 min-1, 0.003-0.021 μmole g-1 min-1, 0.003-0.016 μmole g-1 min-1, 0.004-0.047 μmole g-1 min-1, for β-glucosidase, cellobiohydrolase, β-xylosidase, and N-acetylglucosaminidase, respectively. In general, the activities were highest in the forested swamp followed by the fen and the bog. When the data from three wetlands are combined, the enzyme activities exhibited significant positive correlations with trace gas emission and available carbon.Further, the average activity of 4 enzymes explained about 20-40% of the variations of trace gas emssion and available carbon. The results indicate that enzymes related to the mineralization of organic carbon may play an important role in trace gas flux and DOC dynamics in northern peatlands. A suite of extracellular enzyme activities involved in organic carbon decomposition were determined in three northern peatlands (a bog, a fen, and a swamp) over a 12 month period along with trace gas (CO2 and N2O) flux and DOC dynamics in the wetlands. The activities varied 0.008-0.066 μmole g-1 min-1, 0.003-0.021 μmole g-1 min-1, 0.003-0.016 μmole g-1 min-1, 0.004-0.047 μmole g-1 min-1, for β-glucosidase, cellobiohydrolase, β-xylosidase, and N-acetylglucosaminidase, respectively. In general, the activities were highest in the forested swamp followed by the fen and the bog. When the data from three wetlands are combined, the enzyme activities exhibited significant positive correlations with trace gas emission and available carbon. Further, the average activity of 4 enzymes explained about 20-40% of the variations of trace gas emssion and available carbon. The results indicate that enzymes related to the mineralization of organic carbon may play an important role in trace gas flux and DOC dynamics in northern peatlands.
Park, Sang Eon,Kim, Hojeong,Lee, Jeongmin,Lee, Na Kyung,Hwang, Jung Won,Yang, Jin-ju,Ye, Byoung Seok,Cho, Hanna,Kim, Hee Jin,Kim, Yeo Jin,Jung, Na-Yeon,Son, Tae Ok,Cho, Eun Bin,Jang, Hyemin,Jang, Eun Cambridge University Press 2016 INTERNATIONAL PSYCHOGERIATRICS - Vol.28 No.1
<B>ABSTRACT</B><B>Background:</B><P>Decreased hemoglobin levels increase the risk of developing dementia among the elderly. However, the underlying mechanisms that link decreased hemoglobin levels to incident dementia still remain unclear, possibly due to the fact that few studies have reported on the relationship between low hemoglobin levels and neuroimaging markers. We, therefore, investigated the relationships between decreased hemoglobin levels, cerebral small-vessel disease (CSVD), and cortical atrophy in cognitively healthy women and men.</P><B>Methods:</B><P>Cognitively normal women (<I>n</I> = 1,022) and men (<I>n</I> = 1,018) who underwent medical check-ups and magnetic resonance imaging (MRI) were enrolled at a health promotion center. We measured hemoglobin levels, white matter hyperintensities (WMH) scales, lacunes, and microbleeds. Cortical thickness was automatically measured using surface based methods. Multivariate regression analyses were performed after controlling for possible confounders.</P><B>Results:</B><P>Decreased hemoglobin levels were not associated with the presence of WMH, lacunes, or microbleeds in women and men. Among women, decreased hemoglobin levels were associated with decreased cortical thickness in the frontal (Estimates, 95% confidence interval, −0.007, (−0.013, −0.001)), temporal (−0.010, (−0.018, −0.002)), parietal (−0.009, (−0.015, −0.003)), and occipital regions (−0.011, (−0.019, −0.003)). Among men, however, no associations were observed between hemoglobin levels and cortical thickness.</P><B>Conclusion:</B><P>Our findings suggested that decreased hemoglobin levels affected cortical atrophy, but not increased CSVD, among women, although the association is modest. Given the paucity of modifiable risk factors for age-related cognitive decline, our results have important public health implications.</P>
Remarkable Bacterial Diversity in the Tidal Flat Sediment as Revealed by 16S rDNA Analysis
KIM, BONG-SOO,OH, HUYN-MYUNG,KANG, HOJEONG,PARK, SEOK-SOON,CHUN, JONGSIK 한국미생물 · 생명공학회 2004 Journal of microbiology and biotechnology Vol.14 No.1
A 16S rDNA clone library was generated to investigate the bacterial diversity in tidal flat sediment in Ganghwa Island, Republic of Korea. A total of 103 clones were sequenced and analyzed by comprehensive phylogenetic analyses. No clones were identical to any of known 16S rRNA sequences in public databases. Sequenced clones fell into thirteen lineages of the domain Bacteria: the alpha, beta, gamma, delta, and epsilon Proteobacteria, Actinobacteria, CFB group, Chlorvjlexi, Acidobacteria, Planctomycetes, Verrucomicrobia, and known uncultured candidate divisions (OP11, BRC1, KSB1, and WSl). Two clones were not associated with any known bacterial divisions. The majority of clones belonged to the gamma and delta Proteobacteria (46.7%). Clones of Actinobacteria were distantly related to known taxa. It is evident from 16S rDNA-based community analysis that the bacterial community in tidal flat sediment is remarkably diverse and unique among other marine environments examined so far.
Long-term clinical study and multiscale analysis of in vivo biodegradation mechanism of Mg alloy
Lee, Jee-Wook,Han, Hyung-Seop,Han, Kyeong-Jin,Park, Jimin,Jeon, Hojeong,Ok, Myoung-Ryul,Seok, Hyun-Kwang,Ahn, Jae-Pyoung,Lee, Kyung Eun,Lee, Dong-Ho,Yang, Seok-Jo,Cho, Sung-Youn,Cha, Pil-Ryung,Kwon, H National Academy of Sciences 2016 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.113 No.3
<P>There has been a tremendous amount of research in the past decade to optimize the mechanical properties and degradation behavior of the biodegradable Mg alloy for orthopedic implant. Despite the feasibility of degrading implant, the lack of fundamental understanding about biocompatibility and underlying bone formation mechanism is currently limiting the use in clinical applications. Herein, we report the result of long-term clinical study and systematic investigation of bone formation mechanism of the biodegradable Mg-5wt% Ca-1wt% Zn alloy implant through simultaneous observation of changes in element composition and crystallinity within degrading interface at hierarchical levels. Controlled degradation of Mg-5wt% Ca-1wt% Zn alloy results in the formation of biomimicking calcification matrix at the degrading interface to initiate the bone formation process. This process facilitates early bone healing and allows the complete replacement of biodegradable Mg implant by the new bone within 1 y of implantation, as demonstrated in 53 cases of successful long-term clinical study.</P>
Kim, Geon Ha,Im, Kiho,Kwon, Hunki,Seo, Sang Won,Ye, Byoung Seok,Cho, Hanna,Noh, Young,Lee, Jong Min,Kim, Sung Tae,Park, Sang Eon,Kim, Hojeong,Hwang, Jung Won,Kang, Sue J.,Jeong, Jee Hyang,Na, Duk L. Frontiers Media S.A. 2016 FRONTIERS IN AGING NEUROSCIENCE Vol.8 No.-
<P>The purpose of this study was to demonstrate the potential alterations in structural network properties related to physical activity (PA) in healthy elderly. We recruited 76 elderly individuals with normal cognition from Samsung Medical Center in Seoul, Korea. All participants underwent the Cambridge Neuropsychological Test Automated Battery and 3.0T brain magnetic resonance imaging (MRI). Participants were subdivided into quartiles according to the International Physical Activity Questionnaire scores, which represents the amount of PA. Through graph theory based analyses, we compared global and local network topologies according to PA quartile. The higher PA group demonstrated better performance in speed processing compared to the lower PA group. Regional nodal strength also significantly increased in the higher PA group, which involved the bilateral middle frontal, bilateral inferior parietal, right medial orbitofrontal, right superior, and middle temporal gyri. These results were further replicated when the highest and the lowest quartile groups were compared in terms of regional nodal strengths and local efficiency. Our findings that the regional nodal strengths associated with the attentional network were increased in the higher PA group suggest the preventive effects of PA on age-related cognitive decline, especially in attention.</P>
Label-free bacterial detection using polydiacetylene liposomes
Park, Jimin,Ku, Seul Kathy,Seo, Deokwon,Hur, Kahyun,Jeon, Hojeong,Shvartsman, Dmitry,Seok, Hyun-Kwang,Mooney, David J.,Lee, Kangwon The Royal Society of Chemistry 2016 Chemical communications Vol.52 No.68
<P>Polydiacetylene (PDA) liposomes were prepared to selectively capture target released from bacteria. Specific interplay between released-surfactin and PDA resulted in a conformal change in the structure of PDA, highlighting the potential of indirect interactions between bacteria and PDA in the construction of new label-free bacterial sensors.</P>