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Lee, Myung Gyoon,Jang, In Sung,Beaton, Rachael,Seibert, Mark,Bono, Giuseppe,Madore, Barry American Astronomical Society 2017 ASTROPHYSICAL JOURNAL LETTERS - Vol.835 No.2
<P>Ultra-faint dwarf galaxies (UFDs) are the faintest known galaxies, and due to their incredibly low surface brightness, it is difficult to find them beyond the Local Group. We report a serendipitous discovery of a UFD, Fornax UFD1, in the outskirts of NGC 1316, a giant galaxy in the Fornax cluster. The new galaxy is located at a projected radius of 55 kpc in the south-east of NGC 1316. This UFD is found as a small group of resolved stars in the Hubble Space Telescope images of a halo field of NGC 1316, obtained as part of the Carnegie-Chicago Hubble Program. Resolved stars in this galaxy are consistent with being mostly metal-poor red giant branch (RGB) stars. Applying the tip of the RGB method to the mean magnitude of the two brightest RGB stars, we estimate the distance to this galaxy, 19.0. +/-. 1.3 Mpc. Fornax UFD1 is probably a member of the Fornax cluster. The color-magnitude diagram of these stars is matched by a 12 Gyr isochrone with low metallicity ([Fe/H]approximate to-2.4). Total magnitude and effective radius of Fornax UFD1 are M-V approximate to -7.6 +/- 0.2 mag and r(eff) = 146 +/- 9 pc, which are similar to those of Virgo UFD1 that was discovered recently in the intracluster field of Virgo by Jang & Lee. Fornax UFD1 is the most distant known UFD that is confirmed by resolved stars. This indicates that UFDs are ubiquitous and that more UFDs remain to be discovered in the Fornax cluster.</P>
2,3-Disubstituted-4-Oxo-1,2,3,4-Tetrahydroquinazoline 유도체의 합성
이기창,류정욱,이석우,서상균 明知大學校 産業技術硏究所 1987 産業技術硏究所論文集 Vol.6 No.2
2, 3-Disubstituted-4-oxo-1, 2, 3, 4-tetrahydroquinazolines were synthesized by using the isatoic anhydrides and N-substituted-2-aminobenzamides as starting materials. Intermediates were formed by the reaction of isatoic anhydride with primary amines at various conditions. Final products, 2, 3-Disubstituted-4-oxo-1, 2, 3, 4-tetrahydroquinazolines were synthesized by the fusion of pyridine-3-aldehyde with intermediates for 5hrs at various conditions. By using IR, NMR, MS and elementary analysis, each product was identified and yield of 2, 2-disubstituted-4-oxo-1,2,3,4-tetrahydroquinazolines was nearly 80-90%.
C. polykrikoides 적조의 시공간분포와 중규모 해양환경 변동간의 관계성
서영상,장이현,김학균 한국지리정보학회 2003 한국지리정보학회지 Vol.6 No.3
한국 연근해역의 중규모 해양 환경변동이 Cochlodinium polykrikoides 적조의 시공간 분포 변동과 밀접한 관련성이 있는 것으로 나타났다. 매년 하계 한국 연안역에서 적조가 최초로 발생한 전남 고흥 나로도 연안의 해양환경 상태는 최근 7년(1995~2001) 동안 열염전선대에 위치하였다. 대규모 적조발생은 7년 동안 매 홀수해(1995, 1997, 1999, 2000)에 나타났는데 동중국해 북부해역에서 표면 수온 및 염분의 큰 변동 또한 격년 주기로 나타났다. 저온 고염(홀수해), 고온저염(짝수해)의 중규모적 해황 변동에 따라 적조의 공간분포 규모가 크게 변동되는 것으로 추정되었다. 한편, 동해연안으로 유입 확산되는 C. polykrikoides 적조의 분포와 이동상황은 동해남부 연안에서 발생하는 냉수대의 시공간 변동 규모에 따라 다르게 나타났다. There was a close relationship between spatio-temporal distribution of Cochlodinium polykrikoides red tide and meso-scale variation of oceanographic environment around the Korean waters. Oceanographic conditions of Narodo island, where red tide usually first occurred during summer seasons were formation of the thermohaline frontal zone from 1995 to 2001. Huge C. ploykrikoides red tides were observed in every uneven year during the past 7 years (1995~2001) and quasi-biennial oscillation also occurred in the oceanographic variations of sea surface temperature and salinity in the northern part of the East China Sea during the same years. The distribution area and moving pattern of C. polykrikoides red tides were definitely depended on the temporal and spatial variation of upwelling cold water originated form the southeastern coast of the Korean peninsula in summer season.
점증적 요통 체조와 교육이 만성 요통환자의 근지구력, 유연성 및 통증에 미치는 영향
유승희,공성아,이만균 경희대학교 체육대학 한국체육과학연구소 2004 體育學論文集 Vol.32 No.-
This study was designed to investigate the effects of a 6-week progressive exercise, mainly calisthenics, and education for low back pain on muscular endurance, flexibility, and self-perceived pain in low back patients. Eighteen female patients, aged 48±6.84 years, were volunteered to participate in the study as subjects. Standing height, body weight, percent body fat, waist-hip ratio(WHR), sit-and-reach trunk extension, sit-up, back sit-up, and pain ratings were measured in pre test. Upon the completion of the pre test, they went through the six weeks of interventions composed of progressive exercise and education for the first four weeks and the exercise only for the last two weeks. Then, they were tested in the post test by the same manner as the pre test. The results of pre and post test were compared by the paired t-test. The main results of the present study were as fellows: First, there were no significant changes by the interventions in body weight and WHR, whereas percent body fat were reduced significantly by the interventions. Second, flexibility and muscular endurance were enhanced significantly by the interventions. Third, self-perceived low back pain ratings and perceive ratings of pain in the daily activities were reduced significantly by the six weeks of interventions. It was concluded that low back pain would be relieved by the progressive exercise and education for low back pain, and that the interventions would be helpful to prevent additional injuries by increasing the flexibility and muscular endurance.
Lee, Sang-Il,Lee, Sang Yong,Yoon, Kwon-Ha,Choi, Kyu-Sil,Jang, Kyu Yun,Yoo, Wan-Hee,Kim, Sang-Hyon,Choi, Tae Hyun,Park, Jin Gyoon The Korean Society of Radiology 2009 KOREAN JOURNAL OF RADIOLOGY Vol.10 No.5
<P><B>Objective</B></P><P>To determine the utility of intercellular adhesion molecule (ICAM)-1 antibody-conjugated gadolinium diethylenetriaminepentaacetic acid (Gd-DTPA-anti-ICAM-1) as a targeted contrast agent for the molecular magnetic resonance imaging (MRI) in collagen-induced arthritis (CIA).</P><P><B>Materials and Methods</B></P><P>Three groups of mice were used: non-arthritic normal, CIA mice in both the early inflammatory and chronic destructive phases. The MR images of knee joints were obtained before and after injection of Gd-DTPA-anti-ICAM-1, Gd-DTPA, and Gd-DTPA-Immunoglobulin G (Ig G) and were analyzed quantitatively. The patterns of enhancement on the MR images were compared with the histological and immunohistochemical ICAM-1 staining.</P><P><B>Results</B></P><P>The images obtained after injection of Gd-DTPA-anti-ICAM-1 displayed gradually increasing signal enhancement from the moment following injection (mean ± standard deviation [SD]: 424.3 ± 35.2, n = 3) to 24 hours (532 ± 11.3), rather than on pre-enhanced images (293 ± 37.6) in the early inflammatory phase of CIA mice. However, signal enhancement by Gd-DTPA and Gd-DTPA-IgG disappeared after 80 minutes and 24 hours, respectively. In addition, no significant enhancement was seen in the chronic destructive phase of CIA mice, even though they also showed inflammatory changes on T2-weighted MR images. ICAM-1 expression was demonstrated in the endothelium and proliferating synovium of the early inflammatory phase of CIA mice, but not in the chronic destructive phase.</P><P><B>Conclusion</B></P><P>Molecular MRI with Gd-DTPA-anti-ICAM-1 displays specific images targeted to ICAM-1 that is expressed in the inflamed synovium of CIA. This novel tool may be useful for the early diagnosis and differentiation of the various stages of rheumatoid arthritis.</P>
Lee, Myung Gyoon,Kang, Jisu,Lee, Jeong Hwan,Jang, In Sung American Astronomical Society 2017 The Astrophysical Journal Vol.844 No.2
<P>We present the detection of a large population of ultradiffuse galaxies (UDGs) in two massive galaxy clusters, Abell S1063 at z = 0.348 and Abell 2744 at z = 0.308, based on F814W and F105W images in the Hubble Frontier Fields Program. We find 47 and 40 UDGs in Abell S1063 and Abell 2744, respectively. Color-magnitude diagrams of the UDGs show that they are mostly located at the faint end of the red sequence. From the comparison with simple stellar population models, we estimate their stellar mass to range from 10(8) to 10(9) M circle dot. Radial number density profiles of the UDGs show a turnover or a flattening in the central region at r < 100 kpc. We estimate the total masses of the UDGs using the galaxy scaling relations. A majority of the UDGs have total masses M-200 = 10(10) -10(11) M circle dot, and only a few of them have total masses M-200 = 10(11) -10(12) M circle dot. The total number of UDGs within the virial radius is estimated to be N(UDG) = 770 +/- 114 for Abell S1063 and N(UDG) = 814 +/- 122 for Abell 2744. Combining these results with data in the literature, we fit the relation between the total numbers of UDGs and the masses of their host systems for M-200 > 10(13) M circle dot with a power law, N(UDG) = M-200(1.05 +/- 0.09). These results suggest that a majority of the UDGs have a dwarf galaxy origin, while only a small number of the UDGs are massive L* galaxies that failed to form a normal population of stars.</P>
Lee, Sang Hee,Han, Ji Hoon,Lee, Sung Jae,Cho, Hwi Young,Baek, Jung Heum,Kim, Jae Gyoon korean Academy of Physical Therapy Rehabilitation 2019 Physical therapy rehabilitation science Vol.8 No.1
Objective: For knee osteoarthritis (OA), there is a demand for alternative modalities in order to delay surgery and to avoid the side effects of medications. This study compared the effects of applying seaweed pack and mudpack for the treatment of knee OA. Design: Randomized controlled trial. Methods: Twenty-five patients with knee OA who satisfied the criteria were included. The patients were divided into two groups according to the treatment method: mudpack (n=12) and seaweed pack (n=13). The two groups were treated for 20 minutes, twice a day for five continuous days at the Ocean Healing Center at Wando Island, South Korea. Participants were assessed by clinical scores (Western Ontario and McMaster Universities Osteoarthritis Index, Hospital for Special Surgery Knee Score, Knee injury and Osteoarthritis Outcome Score and 36-Item Short Form Health Survey) and lab results (erythrocyte sedimentation rate, C-reactive protein, insulin-like growth factor-1 [IGF-1], tumor necrosis $factor-{\alpha}$ [$TNF-{\alpha}$]) during the follow-up period. Results: For the most part, clinical scores improved after therapy and maintained improvements for four weeks in both groups (p<0.05). In the seaweed group, $TNF-{\alpha}$ was significantly decreased at two weeks post-therapy (p<0.05). In both groups, IGF-1 was significantly increased immediately post-therapy (p<0.05). There were no statistically significant differences after therapy between the groups in clinical scores and labs. Conclusions: Seaweed packs and mudpacks had similar positive effects for knee OA. Additionally, the seaweed pack group showed decreased levels of $TNF-{\alpha}$ at two weeks post-treatment, which may explain the reduced inflammatory reaction. For rehabilitation therapy, use of seaweed packs may serve as an alternative modality for the treatment of knee OA.