콘텐츠 보호를 위한 DRM이 적용된 P2P 모델

성재연,정연정,윤기송,Sung Jae-Youn,Jeong Yeon-Jeong,Yoon Ki-Song 한국정보처리학회 2006 정보처리학회논문지 C : 정보통신,정보보안 Vol.13 No.4

P2P(Peer to Peer)는 오늘날 가장 주목 받는 파일 공유 시스템으로 현재 네트워크 트래픽의 50% 가량을 점유하고 있을 정도로 많은 콘텐츠의 유통경로가 되고 있다. 이처럼 P2P는 가장 큰 콘텐츠 유통 경로로 활용되기도 하지만 콘텐츠의 가장 큰 불법 유통 경로로 활용되기도 하며 최근에 들어 음악산업뿐만 아니라 영상산업 전반으로 불법 유통을 야기시키고 있으나 현재 이를 방지하면서 P2P의 장점을 최대한 살릴 수 있는 DRM(Digital Right Management)이 적용된 P2P 모델이 제시되지 못하고 있다. 이에 본 논문에서는 기존 DRM 기능들을 변형하여 기존에 P2P 모델에 적합한 형태로 적용함으로써 기존의 P2P 모델구조를 변형시키지 않고 P2P의 높은 확장성(Scalability)과 분산 처리 성능을 지원할 수 있는 콘텐츠 보호를 위한 DRM이 적용된 P2P 모델을 제안한다. P2P(Peer To Peer) system, a most attractive file sharing system, is the largest channel of contents distribution and it takes 50% of network traffic. But P2P systems are infamous for used to illegal contents distribution channel not only in music industry, but also in movie industry. But, DRM(Digital Right Management) enabled P2P models are not suggested until now that interrupting illegal contents distribution and keeping advantage of P2P. So in this paper, we suggest a DRM enabled P2P model that can support distributed processing ability and high scalability with no modification in exist P2P model or architecture.

한방병원에 입원한 말초성 안면신경마비 환자에 대한 한방 치료 1례

성재연,강아현,한동근,서혜진,오주현,이유라,강만호,이형철,엄국현,송우섭 대한한방내과학회 2018 大韓韓方內科學會誌 Vol.39 No.5

Objective: Facial nerve palsy is caused by damage to the seventh cranial nerve. It is the main symptom of facial muscle paralysis on the affected side. If the patient cannot receive proper treatment, severe permanent impairments, both physical and mental, may result, so this disease must be treated appropriately. In this study, a patient with facial nerve palsy was admitted to a Korean medicine hospital for treatment. This case study reports on the patient's progress and the effects of the treatment. Methods: We treated the patient with herbal medicines, acupuncture, herbal acupuncture therapy, and physical therapy. The House-Brackmann Grading System and a weighted regional grading system were used to assess symptom changes. Results: The patient with facial nerve palsy was hospitalized for 50 days and recovered from symptoms without significant problems in the face or to motor function. Conclusion: This case report demonstrates the possibility of treating facial nerve palsy using Korean medicine.

당뇨병을 동반한 요추간판탈출증이 한방 치료를 통하여 호전된 치험 1례

성재연,서혜진,오주현,이유라,공건식,송진영,강만호,이형철,엄국현,송우섭 대한한방내과학회 2019 大韓韓方內科學會誌 Vol.40 No.5

Objective: The aim of this study was to evaluate the effects of traditional Korean medicine as a treatment for a diabetic patient diagnosed with herniated intervertebral lumbar discs. Methods: We treated the patient with herbal medicines, acupuncture, herbal acupuncture therapy, and physical therapy. We measured the state and progress of this case with the Numerical Rating Scale (NRS) and Oswestry Disability Index (ODI). We also checked serum glucose levels (FBS/PP2hrs) regularly. Results: After treatment, the NRS score was decreased, the ODI score was improved, and the blood glucose level was stabilized. The overall symptoms of the patient showed positive improvement.

Carney 증후군에 동반된 눈꺼풀점액종

성재연,이연희,김경남,이성복 대한안과학회 2019 대한안과학회지 Vol.60 No.10

Purpose: To report a case of eyelid myxoma in Carney syndrome. Case summary: A 24-year-old male presented with a 4-year history of a slowly growing nodule at the right upper eyelid. The patient underwent surgical excision five times for the eyelid nodule, which recurred at the same site. He was diagnosed with Carney syndrome. The eyelid lesion was pinkish and lobulated, and the surface was firm and soft. The nodule was completely excised and a histopathological examination revealed a myxoid matrix containing spindle- or stellate-shaped cells and many thin-walled vessels. The nodule was diagnosed as myxoma. There was no recurrence at 13 months after surgery. Conclusions: Myxoma rarely involves the eyelid, but it should be considered in the differential diagnosis of multiple recurrent nodules of the eyelid. Complete excision is important if clinically suspected, and regular follow-up is needed after surgery. In addition, a thorough systemic evaluation, including echocardiography, should be performed to find any evidence of Carney syndrome. 목적: 눈꺼풀에 발생한 점액종 1예를 경험하였기에 이를 보고하고자 한다. 증례요약: 24세 남자 환자가 4년 전부터 서서히 커지는 우안 위눈꺼풀 종괴를 주소로 내원하였다. 수술력으로 같은 위치에 재발하는눈꺼풀 종괴에 대하여 5차례 절제술을 받았으며, 과거력으로 Carney 증후군으로 진단 받았다. 눈꺼풀 병변은 분홍색을 띄는 소엽 모양의 종괴로, 촉진 시 표면은 단단하고 부드러웠다. 절제 생검술을 시행하였으며 조직검사에서 점액성 기질 내에 방추형 및 성상세포와 다양한 크기의 얇은 벽을 가진 혈관들이 관찰되고 점액종으로 진단하였다. 수술 13개월 후 경과 관찰에서 종괴의 재발은 없었다. 결론: 점액종이 눈꺼풀에 발생하는 경우는 드물지만 다발성, 재발성의 특징을 가지는 눈꺼풀 종괴의 경우에는 감별진단으로 점액종을 고려해야 한다. 임상적으로 의심되는 경우 완전한 절제가 중요하며 술 후에는 정기적인 추적 관찰이 필요할 것으로 사료된다. 또한, Carney 증후군 확인을 위하여 심장초음파를 포함한 철저한 전신검사가 필요하다.

동측 일과성 흑암시를 보인 내경동맥 무발생증

성재연(Jae Yun Sung),김경남(Kyoung Nam Kim),정혜선(Hye Seon Jeong),이연희(Yeon Hee Lee) 대한안과학회 2016 대한안과학회지 Vol.57 No.9

목적: 반복되는 일과성 흑암시를 보인 환자에서 동측 내경동맥 무발생을 진단하여 이를 보고하고자 한다. 증례요약: 50세 여자 환자가 좌안에 발생한 일과성 흑암시를 주소로 내원하였으며, 최근 빈도가 잦아져 1개월에 1회 정도로 반복되는 양상이었다. 과거력상 고혈압과 고지혈증을 진단 받고 약물치료 중이었다. 양안 나안시력은 20/20이었다. 세극등현미경검사에서 양안 모두 인공수정체안이었고 이외 특이소견은 없었다. 안저검사에서 근시성 안저와 근시성 경사유두가 관찰되었다. 형광안저혈관조영술 결과는 정상이었다. 전산화단층촬영검사에서 좌측 경동맥관이 관찰되지 않았고, 뇌자기공명혈관조영술에서 좌측 내경동맥이 보이지 않아 내경동맥 무발생으로 진단되었다. 이외의 신경학적검사와 혈액검사는 모두 정상이었다. 이후 일과성 흑암시는 저절로 소실되었으며 12개월 후까지도 증상의 재발은 없었다. 매우 드물지만 일과성 흑암시가 내경동맥의 발생이상과 연관될 수 있음을 보여주었다. Purpose: We report a case of amaurosis fugax associated with ipsilateral internal carotid artery agenesis. Case summary: A 50-year-old woman presented with amaurosis fugax in her left eye; the frequency of episodes of the condition had recently increased to once a month. She had a history of hypertension and dyslipidemia, and was under medical therapy. The visual acuity of both eyes was 20/20. Slit-lamp examination was normal except for pseudophakia. Ophthalmoscopy revealed a myopic tigroid fundus and a myopic tilted disc. No abnormalities were evident in fluorescein fundus angiography. Brain computed tomography showed that the left bony carotid canal was absent, and magnetic resonance angiography showed that the left internal carotid artery was also absent. She was diagnosed with left internal carotid artery agenesis. Other neurological and hematological parameters were within normal ranges. The amaurosis fugax spontaneously disappeared and has not recurred over the past 12 months. Our case, although rare, suggests that amaurosis fugax may be associated with internal carotid artery agenesis.

결핵성 뇌막염환자에서 발생한 눈벌림 마비

성재연(Jae Yun Sung),임형빈(Hyung Bin Lim),이연희(Yeon-Hee Lee) 대한검안학회 2016 Annals of optometry and contact lens Vol.15 No.4

Purpose: We report a case of divergence paralysis associated with tuberculous meningitis. Case summary: A 28 year old man was diagnosed with tuberculous meningitis based on clinical manifestation, cerebrospinal fluid analysis and brain magnetic resonance imaging and was administered anti-tuberculous medication. Four days later, diplopia at distance occurred and the patient was referred to ophthalmologic clinic. Eye motility examination revealed comitant esotropia of 10 prism diopters (PD) at distance and esophoria of 2 PD at near. There was no limitation of eye movement. He was diagnosed with divergence paralysis. 1 week later, esotropia and diplopia are completely resolved. Conclusions: Divergence paralysis associated to tuberculous meningitis is very rare and has not been reported previously. The authors believe this is a case of divergence paralysis associated to tuberculous meningitis and report it as a rare case.

망막정맥폐쇄 환자에서 부분빛간섭계와 초음파를 이용하여 측정한 안축장의 비교

성재연(Jae Yun Sung),허동원(Dong Won Heo),조영준(Young Joon Jo),김정열(Jung Yeul Kim) 대한안과학회 2016 대한안과학회지 Vol.57 No.8

목적: 망막정맥폐쇄의 위험인자로 알려져 있는 안축장의 의의를 평가하기 위하여 접촉식 초음파와 부분빛간섭계를 이용하여 안축장을 측정하였고, 이를 비교분석하고자 하였다. 대상과 방법: 단안에 증상발생 2-3개월 이내의 황반부종을 동반한 망막정맥폐쇄를 진단 받은 환자 19명을 대상으로 후향적인 연구를 시행하였다. 환측을 실험군으로 건측을 대조군으로 분류하였으며, 환측과 건측의 중심황반두께와 안축장을 측정하여 각각을 비교하였다. 중심황반두께는 빛간섭단층촬영기를 이용하여 측정하였고, 안축장은 부분빛간섭계와 접촉식 초음파를 이용하여 측정하였다. 결과: 황반부종을 동반한 망막정맥폐쇄 환자에서 빛간섭단층촬영을 통해 측정한 중심황반두께는 환측 485.7 ± 111.3 μm, 건측 197.8 ± 29.7 μm로 통계적으로 유의한 차이를 보였다(p<0.001). 안축장의 경우 접촉식 초음파로 측정하였을 때 환측은 23.06 ± 0.86 mm, 건측은 23.28 ± 0.93 mm로 통계적으로 유의한 차이를 보였으나(p<0.001), 부분빛간섭계로 측정하였을 때는 환측이 23.35 ± 0.87mm, 건측은 23.38 ± 0.95 mm로 서로 유의한 차이를 보이지 않았다(p=0.456). 결론: 망막정맥폐쇄의 위험인자로 생각되었던 짧은 안축장이 위험인자보다는 측정에 사용된 기기의 특성에 의한 것으로 생각되며, 황반부종이 동반된 경우 부분빛간섭계를 이용하는 것이 초음파를 이용하는 것보다 안축장을 더 정확히 측정할 수 있다는 것을 알 수 있다. Purpose: To evaluate the significance of axial length, which is a known risk factor of retinal vein occlusion, we measured the axial lengthby using contact A-scan sonography and partial interferometry and compared the two values. Methods: This study included 19 patients complaining of visual symptoms and who were diagnosed with unilateral retinal vein occlusion (RVO) with macular edema (ME). Affected eyes were classified as the study group, and healthy fellow eyes were classified as the control group. We measured the central macular thickness (CMT) and axial length (AL) of the affected and fellow eyes and compared them. CMT was measured by optical coherence tomography (Stratus OCT, Carl Zeiss, Jena, Germany), and AL was measured by interferometry (IOL Master??, Carl Zeiss, Jena, Germany). Results: In RVO patients, CMT was significantly different between affected eyes (485.7 ± 111.3 μm) and fellow eyes (197.8 ± 29.7 μm; p < 0.001). Axial length measured by A-scan sonography was 23.06 ± 0.86 mm in the affected eyes and 23.28 ± 0.93 mm in the healthy eyes, which was statistically different (p < 0.001). However, using partial interferometry, the AL was 23.35 ± 0.87 mm in the affected eyes and 23.38 ± 0.95 mm in the healthy eyes. No significant difference was found. Conclusions: We confirmed that short AL, which was once thought to be a risk factor of RVO, results from the properties of the instruments used for measurement. Moreover, we verified that partial interferometry is more accurate for measurement of AL than A-scan sonography when retinal vein occlusion is associated with ME.

휴식과 운동 중 COVID-19 대응 보건용 마스크 착용이 호흡·심혈관계 반응 및 착용감에 미치는 영향

정재연 ( Jae-yeon Jung ),강찬혁 ( Chanhyeok Kang ),성유찬 ( Yuchan Seong ),장세혁 ( Se-hyeok Jang ),이주영 ( Joo-young Lee ) 한국의류산업학회 2020 한국의류산업학회지 Vol.22 No.6

This study explores the effects of facemasks on respiratory, thermoregulatory, cardiovascular responses during exercise on a treadmill and at rest. Five male subjects (25.8 ± 0.8 y, 171.8 ± 9.2 cm in height, 79.8 ± 28.1 kg in weight) participated in the following five experimental conditions: no mask, KF80, KF94, KF99, and N95. Inhalation resistance was ranked as KF80 < KF94 < N95 < KF99 and dead space inside a mask was ranked as KF80 = KF94 < N95 < KF99. The surface area covered by a mask was on average 1.1% of the total body surface area. The results showed no significant differences in body core temperature, oxygen consumption (VO2), carbon dioxide production (VCO2), heart rate or subjective perception among the five experimental conditions; however, cheek temperature, respiratory ventilation and blood pressure were greater for KF80 or KF94 conditions when compared to KF99 or N95 conditions (p<0.05). The differences among mask conditions are attributed to the dead space or specific designs (cup type vs pleats type) rather than the filtration level. In addition, the results suggest that improving mask design can help mitigate respiratory resistance from increased filtration.

아급성기 뇌경색 환자의 좌측 편마비에 대한 한의 치료 1례

오주현,성재연,서혜진,이유라,송진영,공건식,강만호,이형철,엄국현,송우섭 대한한방내과학회 2019 大韓韓方內科學會誌 Vol.40 No.5

Introduction: Stroke refers to a sudden brain disease that results in disorders in the anatomy of the brain. The cause is a sudden circulatory disorder of the cerebrovascular system that creates a consciousness disorder and hemiplegia. Despite aggressive treatment after the onset, stroke is a social problem because the patient has difficulty in recovering from sequelae that can include limb movement disorders, language disorders, and emotional disorders. In this study, we describe the effect of traditional Korean medicine treatment on the sequelae in a subacute cerebral infarction patient admitted to a Korean medical hospital. Case presentation: A 67-year-old male patient was diagnosed with cerebral infarction circa 2005, and his condition had not improved. Around March 15, 2018, he experienced the sudden onset of a cerebral infarction in his daily life. This was confirmed by a brain MRI, and he was hospitalized at other hospitals, but he showed no improvement. We conducted a manual muscle test (MMT) to evaluate the patient's exercise and strength. His gait level was measured to evaluate his degree of walking. He was treated with Bojungikgi-tang and acupuncture twice a day. After 34 days of inpatient treatment, the patient's exercise strength improved from Grade 2+~Grade 3 to Grade 3+ determined by the MMT, and his walking ability improved from Gait Level 3 to Gait Level 4. Conclusion: The findings of this study indicate that acupuncture and herbal medicine treatment can help treat patients with hemiplegia due to cerebral infarction.

편타 손상에 기인한 급성 두통 환자의 한방복합치료 3례

서혜진,성재연,오주현,이유라,공건식,송진영,강만호,이형철,엄국현,송우섭,이원준 대한한방내과학회 2019 大韓韓方內科學會誌 Vol.40 No.5

Objective: The aim of this case report is to describe three clinical cases that indicate positive effects of traditional Korean medicine for the treatment of acute headache attributed to whiplash injury. Method: Three patients were treated with a series of Korean medicine treatment, including Chuna treatment, acupuncture, pharmacoacupuncture, and herbal medicine, during the inpatient treatment period. Results: All patients showed decreases in the numerical rating scale (NRS) and headache impact test (HIT) scores. Conclusion: Traditional Korean medicine has potential benefits for the treatment of acute headache attributed to whiplash injury.