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GPU Library CUDA를 이용한 효율적인 Delaunay 격자 생성에 관한 연구
송지홍(J.H. SONG),강상현(S.H KANG),김경민(G.M. KIM),김병수(B.S. KIM) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
In this study, an efficient algorithm for Delaunay triangulation of a number of points which can be used on a GPU-based parallel computation is studied. The developed algorithm is programmed using CUDA library, and the program takes full advantage of parallel computation which are concurrently performed on each of the threads on GPU. The results of partitioned triangulation collected from the GPU computation requires proper stitching between neighboring partitions and calculation of connectivities among triangular cells on CPU. In this study, the effect of number of threads on the efficiency and total duration for Delaunay grid generation is studied. And it is also shown that GPU computing using CUDA for Delaunay grid generation is feasible and it saves total time required for the triangulation of the large number points compared to the sequential CPU-based triangulation programs.
박기현,송지홍,박원일,이병석,조동제,송찬호,Park, K.H.,Song, J.H.,Park, W.I.,Lee, B.S.,Cho, D.J.,Song, C.H. The Korean Society for Reproductive Medicine 1994 Clinical and Experimental Reproductive Medicine Vol.21 No.3
자궁내막이 생체내 insulin-like growth factor binding protein-1(IGFBP-1)의 혈중치를 유지하는데 얼마나 관여하는지를 평가해 보았다. Immunoreactive IGFBP-1의 혈중치의 측정을 위하여, 월경과다를 주소로 내원한 19명의 환자를 대상으로, gynecologic resectoscopy로 자궁내막 박리를 시행하였다. 자궁내막 박리를 시행한 환자의 혈중 IGFBP-1의 평균치는, 시행전과 비교할 때 감소된 소견을 보였으며, 월경주기와는 상관관계가 없었다. 이러한 소견으로 보아, 자궁내막이 혈중 IGFBP-1의 생성원의 하나로 사료되었다.
이미화,박기현,송지홍,조동제,황동훈,송찬호,Lee, M.H.,Park, K.H.,Song, J.H.,Cho, D.J.,Hwang, D.H.,Song, C.H. 대한생식의학회 1994 Clinical and Experimental Reproductive Medicine Vol.21 No.3
In order to define the clinical characteristics of Korean women with polycystic ovary syndrome, clinical symptoms, biochemical features and ultrasonographic findings were determined in ninety PCO patients. Frequency of clinical manifestations were as follows:acne 42%, overweight 31 %, oily skin 14 %, hirsutism 10%. Relatively low frequencies of hirsutism is recognized in patients with Korean PCO syndrome. Mean(${\pm}$S.E.) of each hormone was:testosterone 1.18${\pm}$1.07ng/ml, LH 21.47${\pm}$${\pm}$2.6mIU/ml, FSH 7.26${\pm}$2.67mIU/ml, LH/FSH ratio 2.94${\pm}$1.29, prolactin 25.48${\pm}$46.33ng/ml, DHEA-S 333.78${\pm}$309.60ng/dl, 17-0HP 1.72${\pm}$1.74ng/ml. Mean 17-OHP after ACTH stimulation test was 5.07${\pm}$12.01ng/ml. Ultrasonographically measured mean ovarian volume were $11.02{\pm}5.92cm^3$ in right and $9.23{\pm}5.64cm^3$ in left and small sized multiple subcapsular follicular cysts were noted in 43 patients (47.9%) with PCO syndrome.
자궁내막증 또는 자궁선근증에 의한 불임환자에서 장기간 GnRH analogue ( Long - term Down DRegulation ) 사용 후 과배란 및 체외 수정 시술의 결과
양광문(K . M . Yang),유근재(K . J . Yoo),최범채(B . C . Choi),김계현(K . H. Kim),이홍복(H . B . Lee),이재훈(J . H . Lee),송인옥(I . O . Song),송지홍(J . H . Song),궁미경(M . K . Koong),전종영(J . Y . Jun),강인수(I . S . Kang) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.10
목적 : 자궁내막증 또는 자궁선근증을 가진 불임 환자의 치료에 있어 GnRH analogue를 사용한 LTDR의 과배란 유도시 그 효과를 알아보았다. 방법 및 재료 : 복강경과 질식 초음파를 이용하여 자궁내막증 또는 자궁선근증을 진단 받은 불임 여성 43명의 47 LTDR cycles이 연구 대상이 되었다. GnRH analogue를 3개월 이상 장기간 사용하여 down regulation 시킨 후 gonadotropin을 이용하여 과배란 유도를 시행한 경우를 LTDR로 정의하였으며 임신을 위해 자궁강 내 정자 주입술 또는 체외 수정 및 배아 이식이 시행되었다. 결과 : 환자의 평균 연령(meanSD)은 33.83.8이었고 자궁선근증이 10cycles였으며 자궁내막증은 34cycles(1기:12cycles, 2기:9cycles, 3기 :5cycles, 4기:8cycles)이었다. 체외 수정 시 이식된 배아는 평균(meanSD) 3.70.3개였다. 자궁내막증을 가진 34cycles중 17.6%(6/34), 자궁선근증을 가진 10cycles중 40.0%(4/10)의 임신율을 보였다.결론 : 이 연구에서 LTDR은 자궁내막증과 자궁선근증에 의한 불임 환자의 치료에 효과적인 것으로 보이나 연구 대상군의 확대 조사가 필요하리라 사료된다. Objective : To assess the clinical efficacy of long term down regulation (LTDR) for in vitro fertilization (IVF) in infertile patients with endometriosis or adenomyosis.Materials and methods : Analysis were made from data collected from 45 paients who had endometriosis or adenomyosis diagnosed using pelvic laparoscopy and ultrasonography and had undergone intrauterine insemination or in vitro fertilization. LTDR was defined as long term, as long as three months down regulation of ovarian function followed by induction of ovulation using gonadotropins. Of these patients, 43 had undergone LTDR followed by IVF-ET, whereas 30patients in control group had undergone short or long protocol as an ovarian stimulation regimen.Results : The multiple independent parameters such as plasma basal estradiol (E2), plasma E2 level on day of hCG administration, number of oocytes retrived, number of good quality oocytes, number of embryo and number of transfered embryos were not significantly different between LTDR treated group and other control group. The clinical pregnancy rate in women treated with LTDR (17.6% in endometriosis, 40% in adenomysis, and 33.3% in endometriosis combined with adenomyosis) were comparable with those of control group (15.4% in endometriosis, 33.3% in adenomyosis and 40% in endometriosis combined with adenomyosis). Conclusions : In this study the LTDR as a ovarian stimulation regimen for IVF does not seems efficienct in infertile patients having endometriosis or adenomyosis than other protocols such as short or long, however further study with large number may be needed.