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김중완,안찬우,전태옥,전언찬,정희균 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.2
Our unicycle has simple mechanical structure.But unicycle's dynamical system is a very sensitive unstable nonlinear system. equations of motion for a simple unicycle robot were derived using Lagrage's method. In this paper, a human fuzzy influence control mechanism was established throught an inquiry into human riding a unicycle, and we developed a hybrid controller to control our unicycle robot. This proposed hybrid controller is consisted with a pure PD and two fuzzy gain scheduled controllers and a direct fuzzy logic controller. Computer simulation results show that our hybrid controller has robust control performnance to unstable nnonlinear unicycle robot system.
Effect of berberine on p53 expression by TPA in breast cancer cells.
Kim, Sangmin,Han, Jeonghun,Kim, Nam-Young,Lee, Se Kyung,Cho, Dong Hui,Choi, Min-Young,Kim, Jee Soo,Kim, Jung-Han,Choe, Jun-Ho,Nam, Seok Jin,Lee, Jeong Eon National Hellenic Research Foundation 2012 Oncology reports Vol.27 No.1
<P>Berberine (BBR), an isoquinoline derivative alkaloid compound, has been reported to have anti-oxidant and anti-carcinogenic effects. A loss of functional p53 is involved with an increased risk of cancer proliferation and metastasis. Here, we investigated the effect of BBR on the transcriptional activity and the protein expression of p53 in p53-positive (wild- type, MCF7 cells) and p53-negative (mutant, MDA-MB231 cells) human breast cancer cells. Our results showed that the basal level of p53 mRNA and protein expression was increased by BBR treatment. However, tumor promoter, TPA, decreased the level of p53 mRNA and protein expression in MCF7 cells with wild-type p53. In addition, TPA-induced down-regulation of p53 mRNA and protein expression was increased by UO126, but not by SP600125 and SB203580. To verify the regulatory mechanism of p53 protein expression, we investigated the effects of proteasomal inhibitors (ALLN and MG132) or a lysosomal inhibitor (chloroquine) on TPA-induced down-regulation of p53. We observed that TPA-induced down-regulation of p53 protein was prevented by ALLN and MG132, but not by chloroquine. Further, we investigated the effect of BBR on TPA-induced down-regulation of p53 mRNA and protein levels. Interestingly, the levels of TPA-induced down-regulation of p53 mRNA and protein were prevented by BBR, but MDA-MB231 cells with mutated p53 were not affected. In addition, TPA-induced down-regulation of p53 mRNA was also prevented by BBR. Taken together, we suggest that BBR may be used as an effective ingredient for anticancer products, which trigger the transcriptional activity and the inhibition of the degradation of p53, a tumor suppressor gene, in human breast cancer.</P>
Dong-Hui Choi,Tae-Bok Ryu,DeokKi Kim,Dong-Eon Kim,Jung-Hyo Lee,Nam-Young Kim 강원대학교 산림과학연구소 2018 Journal of Forest Science Vol.34 No.4
The characteristics of 124 Phytolacca americana present areas and 88 surrounding absent areas over the country were investigated and compared from July 2016 to Sept 2017. The Phytolacca americana was confirmed as having been nationally distributed and is usually found in roadsides at an altitude of 380 m (26%), forest edges (24%), forests (19%), sunny spots (60%), dry soils (53%), sandy loams (31%) and sand+gravel soils (22%). 321 taxons consisting of 79 families, 209 genera, 289 species, 2 subspecies, 26 varieties and 4 cultivars and 286 taxons consisting of 76 families, 195 genera, 256 species, 2 subspecies, 24 varieties and 4 cultivars were found in the Phytolacca americana present areas and the absent areas, respectively. The relative net contribution degree was found highest in the Phytolacca americana (100) followed by Robinia pseudoacacia (29.4), Humulus japonicus (8.8) and Artemisia princeps (6.0) in the present areas, while it was found highest in Robinia pseudoacacia (100) followed by Humulus japonicus (44.4), Artemisia princeps (35.9), Pueraria lobata (18.6) and Setaria viridis (12.3) in the absent areas. The Raunkier’s life form in the present/absent areas was found highest in the therophytes (34%/34%), followed by hemicryptophytes (17%/18%), megaphanerophytes and mesophanerophytes (18%/17%), nanophanerophytes (11%/11%) and geophytes (9%/11%). There was no significant difference in the species diversity between the present (2.141) and the absent (2.124) areas. However, the allelopathic agent and light blocked-out by the Phytolacca americana could possibly inhibit germination and the development of other species; especially, where a difference in species diversity was found high in forests, compared to other habitats (p=0.0605). Accordingly, it is suggested to review possible disturbances of native species habitats in shady spots including forest gaps, although the effect of Phytolacca americana on the ecological system in the suburban open and disturbed areas is not large.
Dong Hui Cho,Se Kyung Lee,Sangmin Kim,Min-Young Choi,Seung Pil Jung,Jeonghui Lee,Jiyoung Kim,Min Young Koo,Soo Youn Bae,Jung-Han Kim,Jee Soo Kim,Kil Won Ho,Jeong Eon Lee,Seok Jin Nam,Jung-Hyun Yang 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.84 No.5
Purpose: We analyzed the responses of patients with locally advanced breast cancer to neoadjuvant chemotherapy (NAC) and NAC combined with neoadjuvant human epidermal growth factor receptor-2 (HER2) targeted therapy (NCHTT). Methods: We retrospectively reviewed 59 patients with HER2 amplified locally advanced breast cancer among patients who were treated surgically after neoadjuvant therapy at Samsung Medical Center between 2005 and 2009. Thirty-one patients received conventional NAC and 28 patients received NCHTT. Pathologic responses were assessed according to response evaluation criteria in solid tumors (RECIST) guidelines. Results: Pathologic complete response (pCR) was achieved in 13 out of 28 patients treated with NCHTT and in 6 out of 31 patients treated with NAC alone (46.4% vs. 19.4%, respectively, P = 0.049). Breast conserving surgery (BCS) was more frequently performed in the NCHTT group than in the NAC only group (71.4% vs. 19.4%, P < 0.001). The 3-year recurrence-free survival (RFS) rate was 100% in the NCHTT group and 76.4% in the NAC group (P = 0.014). Together, NCHTT, type of operation (BCS vs. mastectomy) and pathologic nodal status were significant prognostic factors for RFS in univariate analysis. Conclusion: We found that NCHTT produced higher pCR rates than NAC alone in locally advanced breast cancer.
유방암 환자에서 타목시펜 치료 후 발생한 악성혼합 뮬러리안 종양
김언아 ( Kim Eon A ),최혜영 ( Choe Hye Yeong ),김무희 ( Kim Mu Hui ),이사라 ( Lee Sa La ),박한뫼 ( Park Han Moe ),문혜성 ( Mun Hye Seong ),김승철 ( Kim Seung Cheol ),문병인 ( Mun Byeong In ),한운섭 ( Han Un Seob ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.9
Tamoxifen is widely used for the treatment of breast cancer and currently proposed for preventive strategies. However. there is evidence that tamoxifen may affect other hormone sensitive organs, such as uterus and ovary. It has been documented that tamoxi
침윤성 자궁경부암 병기설정에서 전산화단층촬영과 자기공명영상의 임상적 의의
김언아 ( Kim Eon A ),최혜영 ( Choe Hye Yeong ),이선옥 ( Lee Seon Og ),김윤수 ( Kim Yun Su ),박한뫼 ( Park Han Moe ),문혜성 ( Mun Hye Seong ),김승철 ( Kim Seung Cheol ),전선희 ( Jeon Seon Hui ),김종일 ( Kim Jong Il ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.11
Objective : This study aimed to evaluate the clinical significance of CT or MRI in detecting parametrial invasion, pelvic or para-aortic lymph node metastasis. We also evaluated whether IVP, cystoscopy and sigmoiodoscopy could be replaced by CT or MRI. Me
Choi, Dong-Hui,Ryu, Tae-Bok,Kim, DeokKi,Kim, Dong-Eon,Lee, Jung-Hyo,Kim, Nam-Young Institute of Forest Science 2018 Journal of Forest Science Vol.34 No.4
The characteristics of 124 Phytolacca americana present areas and 88 surrounding absent areas over the country were investigated and compared from July 2016 to Sept 2017. The Phytolacca americana was confirmed as having been nationally distributed and is usually found in roadsides at an altitude of 380 m (26%), forest edges (24%), forests (19%), sunny spots (60%), dry soils (53%), sandy loams (31%) and sand+gravel soils (22%). 321 taxons consisting of 79 families, 209 genera, 289 species, 2 subspecies, 26 varieties and 4 cultivars and 286 taxons consisting of 76 families, 195 genera, 256 species, 2 subspecies, 24 varieties and 4 cultivars were found in the Phytolacca americana present areas and the absent areas, respectively. The relative net contribution degree was found highest in the Phytolacca americana (100) followed by Robinia pseudoacacia (29.4), Humulus japonicus (8.8) and Artemisia princeps (6.0) in the present areas, while it was found highest in Robinia pseudoacacia (100) followed by Humulus japonicus (44.4), Artemisia princeps (35.9), Pueraria lobata (18.6) and Setaria viridis (12.3) in the absent areas. The Raunkier's life form in the present/absent areas was found highest in the therophytes (34%/34%), followed by hemicryptophytes (17%/18%), megaphanerophytes and mesophanerophytes (18%/17%), nanophanerophytes (11%/11%) and geophytes (9%/11%). There was no significant difference in the species diversity between the present (2.141) and the absent (2.124) areas. However, the allelopathic agent and light blocked-out by the Phytolacca americana could possibly inhibit germination and the development of other species; especially, where a difference in species diversity was found high in forests, compared to other habitats (p=0.0605). Accordingly, it is suggested to review possible disturbances of native species habitats in shady spots including forest gaps, although the effect of Phytolacca americana on the ecological system in the suburban open and disturbed areas is not large.