개인용 모바일 환경의 AI 워크로드 수행을 위한 메모리 참조 분석 및 시스템 설계 방안

권석민,반효경 한국인터넷방송통신학회 2024 한국인터넷방송통신학회 논문지 Vol.24 No.1

Recently, mobile apps that utilize AI technologies are increasing. In the personal mobile environment, performance degradation may occur during the training phase of large AI workload due to limitations in memory capacity. In this paper, we extract memory reference traces of AI workloads and analyze their characteristics. From this analysis, we observe that AI workloads can cause frequent storage access due to weak temporal locality and irregular popularity bias during memory write operations, which can degrade the performance of mobile devices. Based on this observation, we discuss ways to efficiently manage memory write operations of AI workloads using persistent memory-based swap devices. Through simulation experiments, we show that the system architecture proposed in this paper can improve the I/O time of mobile systems by more than 80%.

이차성 구순열 환자에서 상구순 구륜근 피판중첩을 이용한 인중주의 재건

권석민,박준,양원용,유영천,강상윤 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.5

Purpose: Philtral deformity is a stigma of secondary cleft lip nose. It occurs from the false arrangement of orbicularis oris muscle and the scar of previous operation. Various methods have been used to correct this deformity. We successfully corrected philtral deformity using overlapping of orbicularis oris muscle flap. Received April 25, 2008 Revised May 22, 2008 Accepted August 12, 2008 Address Correspondence: Won Yong Yang, M.D., Ph.D., Department of Plastic and Reconstructive Surgery, Kyung Hee University Medical Center, 1 Hoegi-dong, Dong- daemun-gu, Seoul 130-702, Korea. Tel: 02)958-8431/Fax: 02)963-5638/E-mail: psyang@khmc.or.kr *본 논문은 2005년 제 58차 대한성형외과학회 학술대회에서 발표되었음. Methods: From November 2000 to August 2007, we performed 39 cases of correction of philtral deformity in secondary cleft lip nose with overlapping of orbicularis oris muscle flap. Their age ranged from 5 to 53 years old. Existing scar tissue of previous operation was deepithelialized and preserved as scar flap. Lateral orbicularis oris muscle flap was elevated, advanced and overlapped upon medial muscle flap after dissection of orbicularis oris muscle of both sides. Reconstruction of philtral column was made from overlapping area by fixation of end part of lateral muscle flap to the point between philtral dimple and column. The degree of muscle flap advancement was decided by correction state of lateral muscle bulging. Correction of nostril floor depression or whistle deformity was also performed with preserved scar flap, if necessary. Results: Realignments of orbicularis oris muscle were possible in the majority of the patients and final results of philtral reconstruction were satisfactory mostly. Correction of nostril floor depression and whistle deformity was also achieved. Additional correction was performed later to 4 patients in whom insufficient reconstruction was noted. No significant complication was observed. Conclusion: More natural and symmetric philtrum was acquired with overlapping of orbicularis oris muscle flap. To the authors' knowledge, it is an easy and effective method for correction of philtral deformity through anatomical rearrangement of distorted orbicularis oris muscle with relatively simple procedure.

자가지방 주사를 이용한 불만족스러운 상안검 주름을 동반한 상안검 함몰의 교정

권석민,박준,양원용,유영천,강상윤 대한성형외과학회 2008 Archives of Plastic Surgery Vol.35 No.4

Purpose: Sunken eyelid is a deformity of upper eyelid due to atrophy of periocular fat tissue, loss of skin elasticity. It causes the skin retraction of eyelid and unfavorable fold. Sunken eyelid occurs from the results of natural aging process, facial trauma, complication of previous periocular surgery, etc. We acquired a satisfied correction of sunken eyelid and unfavorable fold using autologous fat injection only. The aim of this study is a assessment of autologous fat injection for correction of sunken eyelid accompanied with unfavorable fold. Received February 14, 2008 Revised February 25, 2008 Accepted April 28, 2008 Address Correspondence: Won Yong Yang, M.D., Ph.D., Department of Plastic and Reconstructive Surgery, Kyung Hee University Medical Center, 1 Hoegi-dong, Dongdae mun-gu, Seoul 130-702, Korea. Tel: 02)958-8431/Fax: 02) 963-5638/E-mail: psyang@khmc.or.kr * 본 논문은 2005년 제 59차 대한성형외과학회 학술대회에서 발표되었음. Methods: From August 2002 to March 2006, we performed 37 cases of correction of sunken eyelid with unfavorable fold using autologous fat injection. They were all females with ages ranged from 23 to 63. Fat was harvested from lower abdomen and centrifuged with Coleman system. Multi-layered injection of purified fat was done from orbital fat layer to orbicularis oculi muscle. Results: Overall, improvement of sunken eye and unfavorable fold was observed in the majority of the patients. Discomfort of eye opening was improved in 24 patients. The average injection volume was 1.33mL in right eyelid, 1.31mL in left eyelid at first injection. Second injection was done in patients who absorption of injected fat was noted with. No specific complications were observed. Conclusion: Natural and attractive upper eyelid was acquired from fat injection only in sunken eyelid with unfavorable fold. To the authors' knowledge, it is desirable for sunken eyelid accompanied with unfavorable fold to be treated with autologous fat injection at first. Although some shortcomings are substantial, autologous fat injection is easy and effective method for correction of unfavorable fold in sunken eyelid without specific complication.

DEVELOPMENT OF WIDE-FIELD IMAGING CAMERA FOR ZODIACAL LIGHT OBSERVATION

권석민,홍승수,신기진 한국천문학회 2004 Journal of The Korean Astronomical Society Vol.37 No.5

We have developed a wide-eld imaging camera system, called WICZO, to monitor light of the nightsky over extended period. Such monitoring is necessary for studying the morphology of interplanetarydust cloud and also the time and spatial variations of airglow emission. The system consists of anelectric cooler, a CCD camera with 60% quantum eciency at 500nm, and a sh-eye lens with 180eld of view. Wide eld imaging is highly desired in light of the night sky observations in general,because the zodiacal light and the airglow emission extend over the entire sky. This paper illustratesthe design of WICZO, reports the result of its laboratory performance test, and presents the rst nightsky image, which was taken, under collaboration with Byulmaro Observatory, on top of Mt. Bongraeat Yongweol in January, 2004.

복부 초음파로 산전진단된 회장 협착증 1예

권석민,송훈,장두영,최형민,정병준,강영제,이응수 인제대학교 2000 仁濟醫學 Vol.21 No.2

Jejunoilead atresia and stenosis are common causes of neonatal intestinal obstruction, occurring in approximately one in 3000 births. Jejunoileal obstruction can be de tected by prenatal ultrasonography. Typical findings are fluid-filled cystic bowel loops with increased peristalsis and polyhydroamniosis. We experienced 1 case of ileal stenosis diagnosed by prenatal ultrasography and present with brief review of literature.

아주젊은 산개성단 IC 1805와 IC 358의 광전측광

권석민,김현구,이시우 한국천문학회 1982 天文學會報 Vol.7 No.-

암흑 구상체 CB 222 중심부의 13CO 분자선 관측

권석민,윤여울,김나영 한국천문학회 2005 天文學會報 Vol.30 No.2

Development of Wide-field Imaging Camera for Zodiacal Light Observation

권석민,홍승수,신기진 한국천문학회 2005 天文學會報 Vol.30 No.1

여성 생식기에 발생한 콘딜로마에 대한 고찰

권석민,고재환,김용봉,이응수,박성관 인제대학교 1999 仁濟醫學 Vol.20 No.1

첨규 콘딜로마는 최근 그 빈도가 급격히 증가하는 질병으로 아직까지 효과적인 치료법이 없는 실정이다. 여성 생식기에 발생하는 첨규 콘딜로마의 경우 일반적으로 성적인 접촉에 의해 전염되며, 여기에 인유두종 바이러스(Human Papilloma virus)가 매개하는 것으로 알려져 있다. 본 연구에서는 조직학적으로 첨규 콘딜로마로 확진된 26명의 환자중 치료를 받았던 21명에 대해 치료법, 병변의 위치, 크기, 다른 동반된 질병의 유무에 따라 분류한 후 각 군의 재치료율을 고찰하였다. 21명의 환자중 4명(19.0%)이 재치료를 받았으며, 병변이 외음부에만 극한된 경우보다 요도나 항문 주위를 침범한 경우, 외음부를 광범위하게 침범한 경우, 콘딜로마의 크기가 대형인 경우에 재치료율이 높았다. 치료법에 따른 재치료율의 비교에서 일차 치료로서 포도필린을 사용한 경우에 일차 치료로 레이저 시술을 받은 경우보다 재치료율이 유의하게 높았다. Although the incidence of condyloma acuminata, a common sexually transmitted disease caused by certain types of human papilloma viruses, is increasing rapidly and treatment regimens presently are not constantly effective, few currently useful datas is yet established in Korea. We presented our preliminary dada on 21 consecutive patients with the pathological diagnosis of condyloma acuminata in In-Je University Seoul Paik Hospital from April 1997 to October 1998 who were treaded with podophylline(10) or with CO2 laser(11) as a primary therapy. According to our data, CO2 laser therapy, although not an established treatment option, appeared to be a safe alternative and more effective primary therapy than podophylline. (p = 0.0312) So it should be considered in all women with genital condyloma as a primary therapy. Especially laser therapy would be indicated in women who recurrent or podophylline-resistant genital condyloma. In our data, recurrence of condylloma seemed to be more frequent in those patient who had more large(>3mm of lesion size), more extensive(>25% of the genital surface) and more invasive (periurethral- or perianal-involved) lesion. But statistical significance of these results could not be evaluated. To confirm these mentions, more classified and well-systemized studies are expected to perform.

국가 이러닝 정책 현황과 향후 마스터플랜

권석민(Suk Min Kwon),김두연(Doo Yeon Kim),장시준(See Joon Chang) 한국정보과학회 2009 정보과학회지 Vol.27 No.7