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도시가로 구간에서의 비보호/보호좌회전(PPLT) 운영성과 사례분석
정용일 ( Yong Il Jung ),백태헌 ( Tae Hun Beak ),원용준 ( Yong Jun Won ),박병호 ( Byung Ho Park ) 충북대학교 산업과학기술연구소 2014 산업과학기술연구 논문집 Vol.28 No.2
The object of this study is to analyze the effectiveness of PPLT (Permissive Protected Left-turn) based on the characteristics of signal operation (principle of ``leading through-traffic``) in Korea. In the pursuing the above, this study gives an emphasis on analyzing the operational performance of PPLT and suggesting several preconsidered subjects. The main results are as follows. First, PPLT operations of 18 intersections are analyzed to reduce the intersection average delay by 19.2% in peak time and 12.7% in non-peak time, and improve the average travel speed by 28.9% and 7.0%, respectively. Second, the improved PPLT operations which minimize the time of left-turn phase are evaluated to be optimal. Third, the effectiveness of PPLT in peak time (near saturation, relatively high-volume) is analyzed to be more effect than that of non-peak time (under saturation). Finally, under the critical traffic volume, the operational performances of PPLT in link sections are evaluated to be more improved than those of intersections.
신현철,유백근,주명찬,이금원,조태승,신영우,배동한 대한부인종양 콜포스코피학회 1993 Journal of Gynecologic Oncology Vol.4 No.1
Leiomyomatosis peritonealis disseminat,a is a rare non-neoplastic proliferation of histologically benign smooth muscle that occurs in the alxlominal cavity of women during the reproductive years of life, often giving rise to false choical impression of d.isseminated carcinomatosis grossly. In 1952 Wilson & Peale described a condition which they called $quot;multiple peritoneal leiomyomas$quot;. Taubert et al(1965) clearly delinated the features of the lesion and named it leiomyomatosis peritonealis disseminata(LPD). We report a case of leiomyomatosis peritonealis disseminata with a brief review of literatures.
탄소나노튜브 복합소재 전왜 특성과 3D 프린팅을 활용한 로드셀 개발 연구
강인필(Inpil Kang),정관영(Kwan Young Joung),최백규(Beak Gyu Choi),김성용(Sung Yong Kim),오광원(Gwang Won Oh),김병탁(Byung Tak Kim),백운경(Woon Kyung Baek) 유공압건설기계학회 2020 드라이브·컨트롤 Vol.17 No.4
This paper presents the basic research for the design and fabrication of a 3D-printed load cell made of NCPC (nano-carbon piezo-resistive composite). We designed a structure that can resonate at a low frequency range of about 5–6 Hz with ANSYS using sensitivity analysis and a response surface method. The design was verified by fabricating the device with a low-quality commercial 3D printer and ABS filament. We conducted a feasibility test for a commercial sensor using 1000 cyclic load tests at 0.3 Hz in a material testing system. A manufacturing process for the 3D printer filament based on the NCPC was also developed using the nano-composite process.
Cervical endometriosis, mimiking cervical polyp: a case report
( Jae Yoon Jo ),( Seon Mi Lee ),( Yeon Jee Lee ),( Hee Jung Lee ),( Wan Ju Kim ),( In Ae Cho ),( Jeong Kyu Shin ),( Won Jun Choi ),( Jong Hak Lee ),( Won Yong Beak ),( Soon Ae Lee ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-
Endometriosis is one of the most common benign gynecologic disorder and occurs in approximately 15% of woman at reproductive age. Endometriosis often appears as pelvic peritoneal endometriosis or endomrtrioma and causes chronic pelvic pain and infertility in woman. Cervical endometriosis, as one of the numerous ramification of endometriosis, has been reported rarely and it is usually an incidenal or retrospective finding on histopathology report. Endometriosis of the cervix occurs far less than endometriosis of other extrapelvic site, such as abdominal wall or vaginal wall. Most patients are asymptomatic ; however, some have complaints of irregular intermenstural, postcoital spotting, and bloody discharge as our case. The authors hereby describe a recently encountered case of large polypoid cervical endometriosis of the cervix.
Acquired cystic lymphangioma rising from pelvic cavity: a case report
( Jae Yoon Jo ),( Seon Mi Lee ),( Yeon Jee Lee ),( Hee Jung Lee ),( Wan Ju Kim ),( In Ae Cho ),( Jeong Kyu Shin ),( Won Jun Choi ),( Jong Hak Lee ),( Won Yong Beak ),( Soon Ae Lee ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-
Herein, we describe the case of a 37-year-old woman who incidentally presented with a large cystic mass of her left pelvic cavity. A postoperative follow-up ultrasonography after left salpingo-oophorectomy which diagnosed borderline tumor had found abdominal cystic mass. The tumor was not delineated by preoperative pelvic ultrasonography or computed tomography. Because of its origin in the pelvic cavity, a possible ovarian involvement was suspected. Laparoscopic surgery revealed a giant cystic tumor of the mesentery. Based on histopathological examination, a cystic lymphangioma was diagnosed.