http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
한철웅,김종수,류평,오금곤,박세승 조선대학교 전자정보통신연구소 2000 電子情報通信硏究所論文誌 Vol.3 No.1
지능제어 기법중 하나인 퍼지-유전자 알고리즘은 매개변수 불확실성을 갖는 시스템을 제어하기 위한 새로운 제어 기법으로 사용되어지고 있다. 유전자 알고리즘에서, 돌연변이율은 국부적 최소화에 수렴하는 것을 방지하기 위하여 크게 설정하여야만 하지만, 전역 수렴 속도가 감소하는 문제점을 가지고 있다. 이러한 문제점을 개선하기 위하여 퍼지 논리와 유전자 알고리즘을 사용하여 제어기를 설계한다. 본 논문에서는 구륜이동 로봇의 목적궤적을 추적할 수 있는 제어기 설계를 제안한다. 제안된 제어기의 유용성은 모의실험을 통하여 보인다. Genetic algorithms, one of intelligent control methods, is used as new control approach to control the system including the parameter uncertainties In the genetic algorithm, the mutation rate must be set to high to prevent the convergence to local minimum, but it has the problem that the global convergence speed is decreased To enhance this problem, we design the controller by using the fuzzy logic and the genetic algorithm In this paper, we propose the controller design to track to the desired trajectory of the wheeled-mobile robot The validity of the proposed controller is showed through the simulation.
Success and Failure of Surgical Endodontic Treatment in Molar Teeth
Geum, Yun-Seon,Lee, Jang-Ryeol,Kim, Hyeon-Cheol,Lee, Sang-Cheol,Kim, Yeong-Uk Korean Academy of Dental Science 2010 Journal of korean dental science Vol.3 No.2
Despite the latest advancement made in its techniques and devices/apparatuses and the resulting rising expectation in the field of dental surgery, apicoectomy performed in the molar teeth remains a technical challenge and lacks evidence substantiated by long-term follow-up studies. This study sought to investigate the treatment outcomes and post-operative success rate in the root-end resected molar teeth accompanied by a high level of surgical risks due to their close proximity to the mandibular canal and maxillary sinus. A total of 68 patients who received treatment at Livingwell Dental Hospital between 2004 and 2010 and underwent apical surgery in the maxillary or mandibular molar area were enrolled in this study. A total of 160 roots collected from 75 molar teeth were subjected to surgical endodontic treatment and subsequently evaluated clinically as well as radiographically. Based on the results of the study, the clinical success rate was found to be 78.8% in cases involving radiological healing. Likewise, 90.7% of the roots recorded a robust clinical survival rate, but with incomplete healing as shown by radiography. The results indicate that the apical procedure involving molar teeth is a prognosis-friendly method that promises positive outcomes and higher success rate based on long-term follow-up observations.
간세포암종에 대한 Cyberknife 치료 후 완전관해가 왔던 환자에서 하반신 마비가 발생한
노금엽 ( Geum Youb Noh ),한철주 ( Chul Ju Han ),김연주 ( Youn Joo Kim ),양기영 ( Ki Young Yang ),박수철 ( Su Cheol Park ),김진 ( Jin Kim ),김유철 ( Yu Cheol Kim ),김미숙 ( Mi Sook Kim ) 대한간암학회 2011 대한간암학회지 Vol.11 No.2
Radiation therapy (RT) is one of the managements for unresectable hepatocellular carcinoma (HCC). Traditionally, RT has played only a limited role in HCC treatment because of its low efficacy and the low tolerance of the liver for this modality. However, as the technology of RT grows rapidly in recent years, indication of RT for HCC has been extended remarkably. Stereotactic body radiation therapy (SBRT) is a technique that allows precise delivery of a large ablative radiation dose to the tumor while sparing normal surrounding tissue in 1 to 5 fractions. As RT becomes useful therapeutic strategy, the important problem is that there could be serious complication after RT. Here we present a case of 54 years old male with advanced stage of HCC, who underwent a serious neurologic complication of paraplegia following Cyberknife (CK) treatment. He had a huge HCC in right lobe of the liver, and initially transarterial chemoembolization (TACE) was performed with an unsatisfactory response. Therefore, CK was performed, and another TACE was done for a new lesion, which was followed by remarkable complete remission of the tumor. However, paraplegia developed in both of his lower extremities a year after CK. Investigation has shown radiation myelitis as the cause of paralysis. Three and a half years have passed since CK treatment, and HCC is still in complete remission state, however, paraplegia is persistent now. Radiation myelitis should be considered as a complication, when CK is applied to treatment of HCC.
TACE와 Sorafenib 치료 후 수술을 시행한 간세포암종
노금엽 ( Geum Youb Noh ),한철주 ( Chul Ju Han ),김연주 ( Youn Joo Kim ),양기영 ( Ki Young Yang ),박수철 ( Su Cheol Park ),김진 ( Jin Kim ),김유철 ( Yu Cheol Kim ),최윤희 ( Yoon Hee Choi ),이효락 ( Hyo Rak Lee ) 대한간암학회 2011 대한간암학회지 Vol.11 No.1
Surgical resection for hepatocellular carcinoma (HCC) is one of the managements, showing improved long term survival. Nowadays, it is being accepted as the main curative treatment. However, the biggest problem we used to face is that surgery cannot be applied at the point of presentation in many patients due to advanced stage. Here we present a case of 54 years old female, who had transarterial chemoembolization (TACE) and sorafenib due to advanced stage of HCC, and later underwent curative surgery due to remarkable response. She had a CT scan of abdomen, which showed multiple huge masses. HCC was confirmed by ultrasonography-guided liver biopsy. TACE was performed once. After TACE, the size of masses increased. Therefore, sorafenib was administered and then continued for 9 months. As partial response was obtained at that time, surgical resection was successfully done. In the pathological report of removed tumor, we could confirm total necrosis of tumor. Now, it`s been 6 months and she is followed up without any recurrence.
Jeong, Geum-Cheol,Song, Minchul,Park, Hee Jeong,Min, Jung-Joon,Bom, Hee-Seung,Cho, Sang-Geon,Park, Ki Seong,Kang, Sae-Ryung,Kim, Jahae,Song, Ho-Chun,Kwon, Seong Young The Korea Society of Nuclear Medicine 2016 핵의학 분자영상 Vol.50 No.4
Purpose Serum thyroglobulin (Tg) level is frequently elevated shortly after radioactive iodine (RAI) ablation therapy. The authors studied the relationship between the elevation of serum Tg after RAI therapy and iodine uptake pattern on post-ablation whole body scans (RxWBSs) in patients with papillary thyroid carcinoma (PTC). Materials and Methods The study subjects were patients with PTC that had undergone first RAI therapy with thyroid hormone withdrawal after total thyroidectomy. Patients with a high level of serum anti-Tg antibody (TgAb, ${\geq}60U/mL$), possible regional or distant metastasis as determined by pre-ablation or post-ablation studies, and negative iodine uptake of the anterior neck on RxWBS were excluded. Serum Tg was checked twice, that is, 7 days after (post-ablation Tg) and on the day of RAI therapy (pre-ablation Tg). Ratio of pre-ablation Tg to post-ablation Tg (Tg ratio) was used to assess changes in serum Tg levels after RAI therapy. Patients were classified into two groups according to the presence of midline uptake above the thyroidectomy bed on RxWBS (negative (group 1) or positive (group 2) midline uptake). Variables were subjected to analysis to identify differences between the two groups. Results Two hundred and fifty patients were enrolled in this study; 101 in group 1 and 149 in group 2. Based on univariate analysis, post-ablation Tg ($8.12{\pm}11.05$ vs. $34.12{\pm}54.31$; P < 0.001) and Tg ratio ($7.81{\pm}8.98$ vs. $20.01{\pm}19.84$; P < 0.001) were significantly higher in group 2. On the other hand, gender, tumor (T) stage, lymph node (N) stage, size, multiplicity or bilaterality of primary tumor, dose of $^{131}I$, serum TgAb and thyroid-stimulating hormone (TSH) level (before or after RAI therapy) were not significantly different in the two groups. Variables with P values of < 0.25 by univariate analysis were subjected to multivariate analysis, which showed post-ablation Tg (OR 1.060, 95 % CI = 1.028-1.092; P < 0.001) and Tg ratio (OR 1.059, 95 % CI = 1.028-1.092; P = 0.001) were significantly higher in group 2. Conclusion Serum Tg level after RAI therapy was significantly higher in patients with midline uptake on RxWBS, compared with patients without midline uptake on RxWBS. Further investigations are needed to reveal the correlation between serum Tg elevation and clinical outcome according to the presence of midline uptake.
Maternal smoke during pregnancy programs for bone disturbance in offspring
( Geum Joon Cho ),( Hye Ri Hong ),( Soon Cheol Hong ),( Hai Joong Kim ),( Min Jeong Oh ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.98 No.-
Epidemiological studies have focused on the deleterious effects of smoking on human health. Of particular the number of epidemiological studies reported that cigarette smoke decreases bone mineral density (BMD) and increases the risk of bone fracture and is a risk factor for osteoporosis. Maternal smoking during pregnancy results in a variety of adverse developmental outcomes with intrauterine growth restriction. Moreover, maternal smoking is associated with future onset of attention deficit hyperactivity disorder, cardiovascular diseases and obesity in offspring. However, little is known about the effect of maternal smokE during pregnancy on bone mineral density in offspring. Pregnant CD-1 mice were exposed to cigarette smoke (1 or 2 cigarettes/day, 5 days/week) (smoke group) or sham exposed (control group) throughout the pregnancy. After delivery, nursing dams and offspring were kept together in individual cages for 21 days, which corresponds to the lactation period. At weaning, the fourth lumbar vertebral body from each of offspring was scanned with micro-CT apparatus. Trabecular parameters including bone volume fraction (BV/TV, %), thickness (mm), separation (mm), and number (1/mm) were evaluated. The BMD was also measured. There were no differences in trabecular bone volume fraction, thickness, separation and number and the BMD between offspring from control and 1 cigarette smoke dams. However, trabecular bone volume fraction, thickness, and number, and the BMD were significantly lower, but trabecular separation was higher in offspring from 2 cigarettes smoke dams compared with offspring from control dams. In this study, maternal smoking during pregnancy decreased the bone mineral density and disturbed the microarchitecture of bone in offspring. Further studies are needed to evaluate the long term effect of maternal smoke during pregnancy on bone of offspring.