• 한국재난정보학회 논문집
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• 제18권2호
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• pp.418-431
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• 2022

연구목적: 기존의 유망기술 도출 연구에서 대상 특허를 선별하는 과정에서 검색식이 충실하게 구성되지 않아 중요 특허가 분석 대상에서 누락되는 문제와 출원 미공개 기간에 변화하는 최신 기술 트랜드를 반영하지 못하는 문제들을 개선하기 위한 새로운 기법들을 제시한다. 연구방법: 본 논문에서는 R 프로그래밍을 통한 TF와 TF-IDF 등의 연관 키워드 기반 검색식 구성 기법 및 LDA 토픽 모델링 기법을 제안하고, 위성·지상 정보 융합 재난 대응 기술을 중심으로 기존 방법과 비교 분석하여 제안된 기법의 유효성을 확인한다. 연구결과: 상용 특허 DB 시스템을 활용한 제안된 방식 적용을 통해 대상 기술과 관련도가 가장 높은 주요(핵심)특허가 기존 방식(19건) 대비 17건 추가로 도출(36건, 89.5% 증가)되어 중요 특허 누락이 상당히 개선됨을 보였으며 Science ON에 등록된 최근 5년간 발표 논문을 대상으로 LDA 토픽 모델링을 수행하여 최신 기술 트랜드를 반영한 유망 기술 도출이 가능함을 보였다. 결론: 본 논문을 통해 제시한 유망기술 도출 기법을 통해 위성·지상정보 융합 재난 대응 기술분야에서의 유망기술 도출을 통한 신규 연구개발에 유용하게 사용될 수 있는 방향성을 제공하였다.

• 대한예방한의학회지
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• 제27권1호
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• pp.69-87
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• 2023

Objectives : This study collected and analyzed information related to preventive formulas from continuously published and revised COVID-19 treatment guidelines in various regions of China. Methods : We collected treatment guidelines published in different regions of China and categorized formulas for prevention and medical observation period listed in them according to the editions. The categorized preventive formulas were compared by type and target group. Results : Herbal medicines used for prevention included formulas derived from Korean medical classics, such as Okbyeongpungsan(玉屏風散) and Eunkyosan(銀翹散). The newly composed formulas, totaling over 100, were created by adding, subtracting, and combining formulas such as Sang-gukeum(桑菊飮), Eunkyosan(銀翹散), Sasammaekmundongtang(沙參麥門冬湯), Okbyeongpungsan(玉屏風散), Gwakhyangjeong-gisan(藿香正氣散), and Soshihotang(小柴胡湯). Patent medicines including Huoxiangzhengqi capsule(藿香正氣膠囊), Lianhuaqingwen capsule(連花淸瘟膠囊), Shufengjiedu capsule(疏風解毒膠囊), and Jinhuaqinggan granule(金花淸感顆粒) were frequently used, mainly targeting close contacts. These medicines were used differently depending on the specific population group, such as the general population, the elderly, children, pregnant women, and patients with underlying diseases, and were also applied differently according to the individual's constitution. Conclusion : We were able to identify various background factors contained in the guidelines for the use of preventive formulas presented by TCM group, and understand the social conditions that enabled the group to provide such guidelines. Through this, thorough preparation should be made so that the Korean Medicine can actively respond to another future pandemic.

• 대한한의학회지
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• 제44권1호
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• pp.38-55
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• 2023

Objectives: The purpose of this study was to provide direction for future research in the field of Korean medicine by analyzing microbiome based technologies emerging as a new diagnostic and treatment paradigm. Methods: To achieve the purpose of the study intellectual property data was used. After establishing citation network from registered microbiome-related US patents, citation network was analyzed by knowledge persistence-based main path approach to understanding technological trajectories. Furthermore, community detection algorithms were used to quantitatively identifying specific technological domain in a particular time period. Results: Results shows that early technologies in livestock industry contribute most to the recent patents. Knowledge in the patents flow through the path of food and beverage technological domain, and finally are inherited to the recent development of diagnosis, treatment and prevention technic. Conclusions: This study indicate that developing diagnostic tools which can link the composition of microbiome to specific diseases should be given high priority. Researches should lead to novel therapeutic strategies. Specifically, improving reliability of pattern identification and finding effective therapeutic compositions based on principles of Korean medicine is necessary.

• Journal of Medicine and Life Science
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• 제20권3호
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• pp.115-125
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• 2023

Arteriovenous fistula flow dysfunction is the leading cause of vascular access thrombosis and loss in patients undergoing hemodialysis. However, data regarding the influence of access flow rate measurements on the long-term outcomes of access are limited. This study aims to identify accesses at a high risk of thrombosis and loss among patients undergoing hemodialysis by measuring the access flow rate and exploring an optimal threshold value for predicting future access thrombosis. We enrolled 220 patients with arteriovenous fistula undergoing hemodialysis. The primary outcome was the occurrence of access thrombosis. Access flow rates were measured monthly using the ultrasound dilution method and were averaged using all measurements from patients with patent access. In patients experienced access thrombosis, those immediately before the thrombosis were selected. Using these data, we calculated the access flow rate threshold for thrombosis occurrence by analyzing the receiver operating characteristic curve, and the patients were divided into two groups according to whether access flow rates were higher or lower than 400 mL/min. During a median follow-up period of 3.1 years, 4,510 access flows were measured (median measurements per patient, 33 times; interquartile range, 11-54). A total of 65 access thromboses and 19 abandonments were observed. Access thrombosis and loss were higher in the lowflow group than in the high-flow group. This study revealed that low access flow rates are strongly associated with access thrombosis occurrence and subsequent loss of arteriovenous fistulas in patients undergoing hemodialysis.

• 분석과 대안
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• 제8권1호
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• pp.59-85
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• 2024

본고는 인공지능 산업의 발전이 우리나라 경제성장에 미치는 효과를 추정하여 최근의 4차 산업혁명 관련 기술혁신에 대한 경제적 시사점과 함께 관련 경제정책에 대한 함의를 얻고자 하였다. 인공지능 산업 발전 정도에 대한 대용변수로는 2018년~2020년 기간 소프트웨어 정책연구소가 조사한 '인공지능산업실태조사' 중 산업별 AI 관련업체의 매출액 및 특허출원 건수를 사용하였으며 경제성장 변수로는 산업별 총요소생산성과 산업별 GDP를 사용하였다. 추정 결과 AI 산업의 발전은 1년 정도의 시차를 두고 성장에 긍정적 영향을 끼치는 것으로 평가되었다. 특히 매출액 변수를 사용하였을 때 대정부 AI 매출이 GDP 성장에 미치는 효과가 민간 기업이나 소비자 대상 AI 매출에 비해 더 큰 큰 것으로 나타나 AI 산업 확산을 위한 정부의 정책적 노력이 다소 유의한 성과를 가져온 것으로 평가되었다. 다만 인공지능산업실태조사 자료의 기간이 다소 짧고 제조업에 대해서는 중분류 자료가 부재하다는 한계가 있어 관련 자료의 개선과 자료 축적이 진행될 경우 보다 강건한 결과를 도출할 것으로 기대된다.

• Parasites, Hosts and Diseases
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• 제33권1호
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• pp.45-54
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• 1995

한국산 Cryptosporidium baileyi를 2일령의 각 청둥오리와 병아리에 $2{\;}{\times}{\;}10^6$개의 오오시스트와 그 10배단계 희석계열을 $2{\;}{\times}{\;}10^2$까지 5단계를 만들어 경구접종시켜 오오시스트 배설상황과 여러 장기내 발육기의 분포상황을 조사하고나서 초감염내과 조류에 처음에 40 mg/30 g 그 24시간 후에 10 mg/30 g의 carrageenan을 복강내 투여하고 그 6시간 후에 다시 $2{\;}{\times}{\;}10^6$개의 오오시스트를 재차접종하여 면역원성을 조사하였다. 오오시스트 투여량이 많을수록 patent period가 길었고(27-30일간, 병아리: 10-18일간 청둥오리), 오오시스트 배설량도 많았으나(극기에 있어서 $6{\;}{\times}{\;}10^5-3.5{\;}{\times}{\;}10^6$, 병아리: $2{\;}{\times}{\;}10^5-4{\;}{\times}{\;}10^5$, 청둥오리) prepatent period는 짧았다(2-3일간. 병아리: 3-4일간, 청둥오리). 한편, 청둥오리에서는 $2{\;}{\times}{\;}10^3{\;}및{\;}2{\;}{\times}{\;}10^3$의 오오시스트 접종군에서는 오오시스트가 전혀 검출되지 않았다. 오오시스트 경구접종 후 12일에 총배설강과 파브리시우스낭에서 다수의 발육기를 검출할 수 있었는데 병아리가 청둥오리보다 현저하였다. Carrageenan 투여군은 모두 대조군은 병아리에서 $2{\;}{\times}{\;}10^5{\;}및{\;}2{\;}{\times}{\;}10^3$, 그리고 청둥오리에서 이 밖에 $2{\;}{\times}{\;}10^4$의 오오시스트 투여군에서도 재차 접종후 4일에서 14일 및 5일에서 15일까지 분변으로부터 오오시스트가 다소 검출되었다 병아리 및 청둥오리에 있어서 재차접종 직전의 말초혈액내 대식세포수 및 복강내 대식세포 활성은 대조군에 비하여 carrageenan 투여군이 현저하게 낮았다(P < 0.05) 병아리와 청둥오리는 Meblocker인 carrageenan을 투여하였음에도 불구하고 이 원충의 재차감염이 미약하였다는 것은 이 원충의 면역원성이 극히 강력하였다는 것을 뜻한다.

• Journal of Chest Surgery
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• 제27권11호
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• pp.893-901
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• 1994

Forty nine patients [M: 31, F: 18], age from 2 months to 17 years [mean= 4.9 years], underwent operations, from April 1986 to December 1992, for the relief of subvalvular aortic stenosis in normal atrioventricular and ventriculoarterial connections.There were 4 anatomic types of subaortic stenosis : membranous in 29 cases [59.2%], fibromuscular in 11 [22.4%], diffuse tunnel type in 7 [14.3%], and miscellaneous in 2 cases. Thirty four patients [69.4%] had associated cardiac anomalies, of which ventricular septal defect was the most common [27 cases]. Other anomalies were patent ductus arteriosus, coarctation of the aorta, valvular aortic stenosis, double chambered right ventricle [DCRV], infundibular pulmonic stenosis, persistent left superior vena cava, and rigt aortic arch. Mean systolic pressure gradient between the left ventricle and ascending aorta was 26.4$\pm$17.6 mmHg : 13.1$\pm$17.6mmHg in the membranous type, 22.0$\pm$18.4mmHg in the fibromucular type, and 56.1$\pm$38.4mmHg in the diffuse tunnel type. Operative procedures were determined according to the type of subvalvular aortic stenosis : simple excision of subaortic membrane in the membranous type [29 cases], left ventricular myectomy with or without myotomy or fibrous tissue excision in the fibromuscular type [11 cases]. Among the 7 of diffuse tunnel type cases, ventricular myectomy was performed in 2 and a modified Konno operation was performed in 5 . Postoperative follow up was made with periodic echocardiography. The Mean postoperative follow up period was 33.8 months. There were 2 hospital mortalities [4.1%] and 2 late deaths. Residual stenosis remained in 3 cases and recurrence developed in 2 cases during the follow up period. 5 years actuarial survival rate was 91.8$\pm$3.9% and 5 year complication free rate was 72.3$\pm$10.4%. Conclusions : 1. Subvalvular aortic stenosis should be relieved completely as soon as possible when diagnosed, regardless of left ventricular outflow tract pressure gradient. 2. Good results were obtained using only simple excision of subaortic membrane in the membranous type of subaortic stenosis. However, aortoventriculoplasty [modified Konno prodedure] was necessary for good results in the diffuse tunnel type. 3. Periodic postoperative echocardiography was helpful in detecting the progression of residual stenosis and development of new stenosis.

• 대한한의학회지
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• 제30권5호
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• pp.137-145
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• 2009

Objectives: This study was performed to elicit the effectiveness of a herbal formula, Kamisoyo-san (Jiaweixiaoyaosan) on enhancing ovarian function in infertile woman with ovarian dysfunction. Methods: 28 patients who initially visited between November 2006 and February 2009 and were administered Kamisoyo-san until May 2009 were retrospectively evaluated for their ovarian function by means of basal FSH (b-FSH), menstrual cycle, body mass index (BMI), and body fat ratio. To identify the major factor of improving ovarian function, 28 patients were classified into two groups by criteria of patent factors, such as pre-administration b-FSH, patient age, and treatment duration, respectively. Two groups were compared in terms of pregnancy percentage, b-FSH, menstrual cycle, BMI, and body fat ratio. Results: Post-administration b-FSH significantly decreased in comparison with pre-administration (p=0.004). The higher group (b-FSH $\geq$ 25mIU/mL) in pre-administration b-FSH was more effective in decrease of post-administration b-FSH than the lower one (10mIU/mL < b-FSH < 25mIU/mL). Conclusion: Kamisoyo-san may have a therapeutic effect on the infertility of child bearing period woman with ovarian dysfunction.

• Clinical and Experimental Pediatrics
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• 제55권7호
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• pp.232-237
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• 2012

Purpose: With feasibility in the diagnoses of congenital heart disease (CHD) in the antenatal period, we suspect changes have occurred in its incidence. No data have been reported about the current incidence of simple forms of CHD in Korea. We have attempted to assess the recent incidence and characteristics of CHD in the neonatal care unit of a secondary referral medical center. Methods: Medical records of 497 neonatal care unit patients who underwent echocardiography in the past 5 years were reviewed. Preterm infants with patent ductus arteriosus and other transient, minimal lesions were excluded from this study. Results: Although the number of inpatients remained stable, the incidence of simple forms of CHD showed a gradual decrease over the 5-year study period; a markedly low incidence of complex forms was seen as well. CHD was observed in 3.7% full-term and 6.8% pre-term infants. CHD was observed in 152 infants weighing >2,500 g (3.5% of corresponding birth weight infants); 65 weighing 1,000 to 2,500 g (9.3%); and 6 weighing <1,000 g (8.0%). The incidence of CHD was higher in the pre-term group and the low birth weight group than in each corresponding subgroup (P<0.001); however, the incidence of complex CHD in full-term neonates was high. The number of patients with extracardiac structural anomalies has also shown a gradual decrease every year for the past 5 years. Conclusion: Findings from our study suggest that the recent incidence and disease pattern of CHD might have changed for both complex and simple forms of CHD in Korea.

• Parasites, Hosts and Diseases
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• 제36권3호
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• pp.171-182
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• 1998

반추동물에 있어서 쥐와포자충의 감염 동태에 관한 지식에는 불충분한 점이 많다. 그래서 11마리의 1~20일령의 재래산양과 면양에 $2{\;}{\times}{\;}10^7$의 쥐와포자충 (MCR주) 난포낭 (oocyst)을 한 번에 경구투여한 다음 분변 내의 난포낭 배설 양상을 관찰하였다. 11마리의 재래산양과 면양 중 4마리에서만 분턴에서 억대 (108/day/head)에 이르는 난포낭이 검출되었는데 반해 3마리에서 천만대, 나머지 예에서는 극히 적은 수만이 검출되었다. 전기생충증명기는 19-35일로서 평균 $28.1{\;}{\pm}{\;}5.8일$, 기생충증명기는 16-85일로서 평균 $47.8{\;}{\pm}{\;}21.1일$, 분변 내 난포낭 배설량은 최고가 $613.5{\;}{\times}{\;}10^6$, 평균 $156.6{\;}{\times}{\;}10^6{\;}{\pm}{\;}253.6{\;}{\times}{\;}10^$이었으며, 이 원충에 대한 연령의존성 저항은 인정 할 수 없었다 한편, 감염 후 44일째 난포낭 배설 극기에 희생시킨 재래산양의 제4위 점액세포의 미세융모 내에서 이 원충의 모든 단계의 발육기를 관찰할 수 있었다. 모든 발육기에서 바깥쪽이 숙주세포의 두터운 사상돌기로 둘러싸여 있는 쥐와포자충 특유의 전단 돌출부를 볼 수 있었다. 또, 이 원충의 재래산양/마우스 모델 감염실험에서 마우스 고유의 난포낭 배설 양상이 인정되었다. 이 원충의 면역원성과 난포낭의 재생산이 도전감염실험과 면역억제에 의하여 증명되었다. 이상의 실험 결과로 반추수에 있어서 쥐와포자충의 내생발육을 입증하였다.