시스템 에어리어 네트?에서의 동기화 기법

송효정(Hyo Jung Song) 한국정보과학회 2005 정보과학회논문지 : 시스템 및 이론 Vol.32 No.5·6

많은 Application이 QoS(Quality of Service)를 요구한다. 본 논문에서는 시스템 에어리어 네트웍에서 QoS의 일종인 성능 예측성에 촛점을 맞춘다. 예측성을 만족시키기 위해 네트웍상의 모든 통신 스트림이 정적으로 스케쥴된다고 가정할 때, 각 네트웍 인터페이스는 정해진 스케쥴을 제 때에 실행하여야 하며 이를 위해서는 각 인터페이스의 시간베이스가 모두 동기화 되어야 한다. 본 논문에서는 이 동기화 문제를 다루었다. 동기화 문제를 해결하기 위해서, 본 논문에서는 링크 레벨 흐름 제어 신호를 이용해서 기 제안된 FM-QoS 기법을 확장하였다. FM-QoS는 네트웍이 하나의 스위치로만 구성될 때가능한 동기화 기법이다. 본 논문에서는 임의의 망구조에서 1) 네트웍 인터페이스들이 동기화되기 위한 흐름 제어 신호의 조건 (동기화 스케쥴로 칭함)을 규정하고, 2) 동기화 스케쥴의 정확도를 분석하였다. 제안한 방식의 실례를 보이기 위해서, 하나의 스위치로 구성된 네트웍과 여러 개의 스위치로 구성된 트리 구조 네트웍에서 각기 동기화 스케쥴을 예시하고 이의 정확도를 수치적으로 분석하였다. 분석된 정확도가 실제 시스템에서 어느 정도의 값을 갖는지를 이해하기 위해서, Myrinet 스위치로 구성된 망에 대해서 실험하였다. 실험 중 관찰된 최대 정확도의 에러는 9.2 마이크로 세컨드이며, 이 수치를 바탕으로 본 논문은 제안한 동기화 알고리즘이 시스템 에어리어 네트웍에서 효과적이라고 결론지었다. Many applications in cluster computing require QoS(Quality of Service) services. Since performance predictability is essential to provide QoS service, underlying systems must provide predictable performance guarantees. One way to ensure such guarantees from network subsystems is to generate global schedules from applications' network requests and to execute the local portion of the schedules at each network interface. To ensure accurate execution of the schedules, it is essential that a global time base must be maintained by local clocks at each network interface. The task of providing a single time base is called a synchronization problem and this paper addresses the problem for system area networks. To solve the synchronization problem, FM-QoS proposed a simple synchronization mechanism called FBS(Feedback-Based Synchronization) which uses built-in flow control signals. This paper extends the basic notion of FM-QoS to a theoretical framework and generalizes it: 1) to identify a set of built-in network flow control signals for synchrony and to formalize it as a synchronizing schedule, and 2) to analyze the synchronization precision of FBS in terms of flow control parameters. Based on generalization, two application classes are studied for a single switch network and a multiple switch network. For each class, a synchronizing schedule is proposed and its bounded skew is analyzed. Unlike FM-QoS, the synchronizing schedule is proven to minimize the bounded skew value for a single switch network. To understand the analysis results in practical networks, skew values are obtained with flow control parameters of Myrinet-1280/SAN. We observed that the maximum bounded skew of FBS is 9.2μsec or less over all our experiments. Based on this result, we came to a conclusion that FBS was a feasible synchronization mechanism in system area networks.

명동액션영화: 식민-해방-냉전기 기억의 소급적 상상

송효정 ( Hyo Jung Song ) 국제비교한국학회 2013 비교한국학 Comparative Korean Studies Vol.21 No.3

Since 1969, it began to appear a series of Korean gangster films attached ‘Myeung-Dong〔明洞〕’ as movie title. From <Native of Myeong-Dong> (1969) to <Leaving Myeong-Dong>(1972), these trendy films were intensively produced. This study focuses on ‘Korea-specific’ gangster films as ‘Myeung-Dong Action Films’ in early 1970s. For a long time they were regarded as low rent films and neglected from Korean film researches. In these types of movies Myeung-Dong was retrospective space of Korean modern history; through colonial-Liberation-postwar era. At the same time Myeung-Dong could be “imagined” Asian symbolic space. Exotic space like Hongkong, Shanghai, Tokyo in spy thriller films in late 1960s could be exchanged for Myeung-Dong in early 1970s. Also Meyung-Dong was geopolitical space that could access to Shanghai(base for the independence movement) or Tokyo(symbolic hometown of colonial rulers and Japanese yakuza). Struggles for occupying Meyung-Dong could be racial hegemony struggles between Korean and Japanese in the colonial era background Myeung-Dong Action Films such as <Gallant Man(Paldo〔八道〕 Sanai)>(1969), <Native of Myeong-Dong>(1969). Or Meyung-Dong could be ideological conflict territory between left-wing and right-wing in the Liberation era and Korean War background Myeung-Dong Action Films such as <Old Gentleman in Myeongdong>(1970), <Time on Myungdong>(1971), <The Graduation from Myeongdong>(1971), <Leaving Myeong-Dong>(1972) etc. Gangsters from Paldo(八道, means whole country) could share a loyalty and form brotherly ties. They could be as if members of a vigilance committee, as if the police or soldiers in the Liberation and Korean War era. Not as a individual-hero but as collective heroes, they reminded us the era of military regime that was the golden age of male-soldier-elite. Gangsters were B-list symbols of political group as male-soldier-elite. Myeung-Dong Action Films as Korean gangster dealt with ‘brotherly nationalism’ of enlightening and wild male bunch. Through Liberation to postwar, brotherly nationalism easily could be combined with anti-communism. Myeung-Dong Action Films in early 1970s remained in existence ‘Jongno〔鐘路〕 Action Films’ in mid 1970s.

少陽病의 病理에 關한 文獻的 考察

宋孝貞(Hyo Jung Song) 대한한의학회 1988 대한한의학회지 Vol.9 No.1

원저 : 계피 , 황금이 Prednisolone 으로 유발된 생쥐의 면역반응저하에 미치는 영향 ( Original Articles : The Effects of Cassiae Cortex and Scutellatiae Radix on Depressed Immune Response in Mice Induced by Prednisolone )

송효정(Hyo Jung Song) 경희대학교 경희의료원 1987 慶熙醫學 Vol.3 No.2

파킨슨병 환자의 하부요로증상에 영향을 미치는 요인

송효정(Song, Hyo Jeong),강지훈(Kang, Ji Hoon),이은주(Lee, Eun Joo),허정식(Huh, Jung-Sik),김영주(Kim, Young-Joo),김철수(Kim, Chul Soo),김명자(Kim, Myung Ja),정승교(Chaung, Seung Kyo),박혜자(Park, Hye Ja),강형창(Kang, Hyung Chang),오 한국간호과학회 2009 Journal of Korean Academy of Nursing Vol.39 No.1

빛간섭단층촬영 영상의 분석 알고리즘에 따른 당뇨황반부종 측정치의 신뢰도 비교

계효정(Hyo Jung Gye),배정훈(Jeong Hun Bae),송수정(Su Jeong Song) 대한안과학회 2016 대한안과학회지 Vol.57 No.5

목적: 당뇨황반부종에서 자동망막경계설정 소프트웨어(automatic segmentation software)인 CirrusTM High definition optical coherence tomography (HD-OCT) segmentation algorithm과 Iowa reference algorithm을 이용하여 망막층의 경계설정 신뢰도를 비교하고자 하였다. 대상과 방법: Cirrus algorithm과 Iowa algorithm을 이용하여 당뇨황반부종 환자 23명(30안)의 중심와두께를 측정하고 망막층을 세분화하여 신뢰도를 비교하였다. 두 알고리즘의 일치도, 상관관계 및 신경절세포층과 망막신경섬유층의 경계설정 오류빈도를 평가하였다. 결과: Cirrus software로 측정한 중심와두께는 평균 512.07 ± 182.35 μm로 Iowa algorithm 측정치인 476.53 ± 32.36 μm에 비해 유의하게 높았다(p〈0.05). 두 알고리즘 측정치의 급내상관계수는 0.929였고 유의한 상관관계를 보였다(β=0.868, p〈0.001). 신경절세포층과 망막신경섬유층의 경계설정 오류빈도는 중심와두께가 400 μm 미만인 경우 Cirrus algorithm과 Iowa algorithm에서 각각 45%, 9%였고 400 μm 이상인 경우 95%, 42%였다. 결론: 당뇨황반부종에서 중심와두께는 Cirrus algorithm과 Iowa algorithm 사이에 비교적 높은 일치도와 유의한 상관관계를 보였으나, 신경절세포층과 망막신경섬유층 측정에 있어서는 두 알고리즘이 차이를 보였고, 특히 중심와두께가 400 μm 이상인 경우 망막층의 경계설정 신뢰도는 Iowa algorithm에서 더 높았다. Purpose: To evaluate segmentation reliability in diabetic macular edema (DME) estimates between a CirrusTM HD-OCT image analysis algorithm and an Iowa reference algorithm, which are an automatic segmentation software. Methods: Thirty eyes from 23 patients diagnosed with DME were included and underwent spectral-domain optical coherence scans (CirrusTM HD-OCT). Central foveal thickness (CFT) and ganglion cell layer-inner plexiform layer segmentation data were compared with those produced by the CirrusTM HD-OCT segmentation algorithm and Iowa reference algorithm. Measurement agreement was assessed using intraclass correlation (ICC) and segmentation errors were confirmed by 2 ophthalmologists. Results: The mean CFT in the 1-mm central area determined by the manufacturer-supplied Cirrus software and Iowa reference algorithm was 512.07 ± 182.35 μm and 476.53 ± 32.36 μm, respectively (p 〈 0.05). The mean paired difference was 35.53 ± 92.46 μm (ICC, 0.929). Segmentation errors were demonstrated in eyes with a CFT less than 400 μm, specifically for 45% of scans obtained by the Cirrus algorithm and 9% from the Iowa algorithm, in eyes with a CFT equal to or higher than 400 μm, the error rates were 95% and 42%, respectively. Conclusions: CFT measurement in eyes with diabetic macular edema using the Cirrus algorithm and Iowa algorithm showed relatively high degrees of agreement and significant correlation. In eyes with a CFT equal to or higher than 400 μm, the Iowa algorithm showed higher reliability in retinal segmentation than the Cirrus algorithm.

지역사회 거주 노인의 하부요로증상 실태

송효정,박민정,김성준,허정식,Song, Hyo Jeong,Park, Min Jeong,Kim, Sung Joon,Huh, Jung Sik 한국가정간호학회 2015 가정간호학회지 Vol.22 No.2

Purpose: This study aimed to identify the prevalence of lower urinary tract symptoms (LUTS), evaluate factors affecting LUTS among community-dwelling older adults, and provide basic data for a community-based LUTS management program. Methods: A community-based cross-sectional study was conducted from April to November 2010 by using a structured questionnaire. Participants were 157 individuals recruited from 5 community senior centers. Results: The mean LUTS score of the older adults was 9.4 (International Prostate Symptom Score range 0-35). For each LUTS (range 0-5), nocturia was the highest (2.3). Of all older adults, 24.8% had experienced urinary incontinence more than once a month during the past 6 months. Urinary incontinence was found to be an important factor associated with LUTS. Conclusion: A community-based management program for both LUTS and urinary incontinence in community-dwelling older adults should be implemented.

혈전증(血栓症) 및 고점도혈증(高粘度血症)에 관(關)한 보양환오탕(補陽還五湯)의 실험적(實驗的) 연구(硏究)

송효정,Song, Hyo-Jung 대한한방내과학회 1989 大韓韓方內科學會誌 Vol.10 No.1

In order investigate the effect of Boyanghwanotang (BT) on thrombosis, Sprague-Dawley rats injected endotoxin into the caudal vein were oral administrated solid extract of BT-182. 4mg/200g (Sample A) and 364.8mg/200g (Sample B), and then observed Platelet, fibrinogen, prothrombin time and FDP. Another group injected hydrocortisone acetate into the muscular rump were adopted to observe the effect of BT on elevated blood Viscosity, administrated Sample A and Sample B, thereafter measured body weight, body temperature, whole blood viscosity, plasma viscosity, hematocrit, RBC, WBC, hemoglobin, glucose, albumin, total protein, triglyceride, cholesterol and prothrombin time. 1. Platelet was increased significantly in Sample B compared with the control group. 2. Fibrinogen of the trial groups compared with the control group was increased, and revealed a significance in Sample B. 3. Prothrombin time was decreased significantly in the trial groups compared with the control group. 4. FDP was decreased in the trial groups compared with the control group. 5. Body weight was increased significantly in Sample B after 7 days, body temperature revealed a significance in the trial groups after 5 days. 6. Whole blood viscosity and plasma viscosity of lower shear rates, both were highly decreased in the trial groupn than the control group. 7. The increase of WBC and decrease of hematocrit, RBC and hemoglobin was showed in the trial groups, and Sample B revealed a significance on the increase of WBC and decrease of RBC. 8. The increase of prothrombin time and decrease of glucose, albumin, total protein, triglyceride and cholesterol was showed in the trial group, and Sample B revealed a Significance on the increase of prothrombin time and decrease of albumin, total protein and triglyceride. 9. As compare with Sample A and Sample B, generally Sample B was highly Significant. According to the above results, it was considered that Boyanghwanotang may be the curative effects for thrombosis and elevated blood viscosity.

당뇨망막병증 최신 지견

계효정 ( Hyo Jung Gye ),송수정 ( Su Jeong Song ) 대한내과학회 2015 대한내과학회지 Vol.89 No.3

Over the past decade, significant advances have been made in both the diagnosis and treatment of diabetic retinopathy. Ultrawide field fundus photography and spectral domain optical coherence tomography have allowed more accurate, convenient, and early diagnosis of diabetic retinopathy. Numerous randomized clinical trials have demonstrated the effectiveness of anti-vascular endothelial growth factor agents for the treatment of diabetic retinopathy, although more work is necessary in terms of long-term clinical outcomes and socioeconomic costs associated with these treatments. (Korean J Med 2015;89:271-276)

중환자간호학회지 2008~2013년 게재 논문 분석

손연정,강지연,송효정,박영례,이윤미,박진희,김민주,Son, Youn-Jung,Kang, Jiyeon,Song, Hyo-Jeong,Park, Young-Rye,Lee, Yun-Mi,Park, Jin-Hee,Kim, Minju 한국중환자간호학회 2013 중환자간호학회지 Vol.6 No.2

Purpose: The purpose of this study was to identify the trends in studies published in Journal of Korean Critical Care Nursing (JKCCN) from 2008 to 2013. Methods: A total of 65 studies published between 2008 to 2013 were reviewed using criteria developed by researchers. Results: Approximately 36% of studies were conducted with patients. Intensive care unit (ICU) was the most popular site as the study setting. Among 59 research papers, 42.4% were approved by institutional review board (IRB). Quantitative studies were 78.6%, while qualitative studies were 4.6%. The research designs for the quantitative studies were survey (52.3%), quasi-experimental (16.9%), and so on. There was no randomized controlled trial. The most frequently used methods to provide nursing intervention was education. In addition, "nurse" and "ICU" were most commonly used keyword. Conclusion: Considering the low rate of IRB approval, more stringent application of research ethics is necessary to improve the quality of JKCCN. In addition, more randomized controlled trials should be encouraged to support evidence-based practice in critical care.