헬기 생존계통 센서 운용 환경 하에서의 데이터 융합 알고리즘에 관한 연구

박영선,김화수,김숙경,우상민,정훈기,Park, Young-Sun,Kim, Hwa-Soo,Kim, Sook-Gyeong,Wu, Sang-Min,Jung, Hun-Gi 한국국방경영분석학회 2008 한국국방경영분석학회지 Vol.34 No.3

The purpose of this paper is to design an algorithm for data fusion of sensors data in the helicopter ASE system, using Bayesian Network, which was selected among several knowledge base data fusion methods after consideration and applied to this study. The result of the algorithm analysis shows that Bayesian Network is effective method for solving this problem. 본 논문은 최근 개발되는 헬기의 생존성 보장을 위하여 장착되는 센서체계에서 상호 독립적으로 수집된 센서 데이터의 융합 알고리즘 개발을 위하여 다양한 지식 기반의 데이터 융합 기법 등을 검토하였다. 이 논문에서는 다양한 데이터 융합기법 중에서 헬기 생존 계통 센서 체계의 데이터 응함에 유효한 대안이 될 수 있는 Bayesian Network를 이용한 지식 기반의 데이터 융합 기법 알고리즘을 설계하고 구현하였다.

중환자의 중증도에 따른 적정 간호인력 수요 산정

박영선,송라윤,Park, Young Sun,Song, Rhayun 한국중환자간호학회 2017 중환자간호학회지 Vol.10 No.1

Purpose: This study aimed to estimate the appropriate nurse staffing ratio in intensive care units (ICUs) by measuring nursing workload based on patient's severity and needs, using the Korean Patient Classification System for critical care nurses. Methods: The data were collected from January 18 to February 29, 2016 using a standardized checklist by observation or self-report. During the study period, 723 patients were included to be categorized from I to IV using the patient classification system. Measurement of total nursing workload on a shift was calculated in terms of hours based on the time and motion method by using tools for surveying nursing activities. The nursing activities were categorized as direct nursing care, indirect nursing care, and personal time. Total of 127 cases were included in measuring direct nursing time and 18 nurses participated in measuring indirect and personal time. Data were analyzed using descriptive statistics. Results: Two patients were classified into Class I (11.1%), 5 into Class II (27.8%), 9 into Class III (50%), and two into Class IV (11.1%). The amount of direct nursing care required for Class IV (513.7 min) was significantly more than that required for Class I (135.4 min). Direct and indirect nursing care was provided more often during the day shift as compared to the evening or night shifts. These findings provided the rationale for determining the appropriate ratio for nursing staff per shift based on the nursing workload in each shift. Conclusions: An appropriate ratio of nurse staffing should be ensured in ICUs to re-arrange the workload of nurses to help them provide essential direct care for patients.

보중익기탕(補中益氣湯), 십전대보탕(十全大補湯), 영계출감탕(?桂朮甘湯)이 장음으로 평가된 흰 쥐의 위(胃) 수축력(收縮力)에 미치는 영향

박영선,윤상협,Park, Young-Sun,Yoon, Sang-Hyub 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.2

Objectives : The aims of this study were to evaluate whether gastric contractility could be measured by bowel sound of rats, and whether gastrointestinal side effect of any herbal restoratives would be related with their inhibition of gastric contraction. Methods : Streptozotocin (STZ)-induced diabetic rats were used as a gastric hypocontraction model. At the time of 6 weeks after induction of diabetes, 2mL of normal saline (NS) and 2mL of extract solution each containing 125mg/kg of Bojoongikki-tang (BJ), Sipjeondaebo-tang (SJ), Youngkaechulgam-tang (YG) were given to Normal (NR) and diabetic rats (DR), respectively. Bowel sound was recorded for 30 minute in fasting, and 120 minute of their administration. Gastric motility index was serially calculated with the ratio of accumulated potentials of post-administration/fasting state every 10 minutes. Results : Gastric contractility between NR and DR could be significantly distinguished by bowel sound auscultation. BJ had a decreasing effect, SJ had a bidirectional effect, and YG had an increasing effect on gastric contractility measured by bowel sound auscultation. Conclusions : BJ showed the possibility of inhibitory effects on gastric contraction. So, before administration, a gastric motility test should be recommended to prevent possible side effects in patients with gastric hypocontractility.

Digitalis lanata 세포고정화에 의한 생물학적 변환

박영선,김혜경,홍희전,김동일 ( Young Sun Park,Hye Kyoung Kim,Hee Jeon Hong,Dong Il Kim ) 한국공업화학회 1995 공업화학 Vol.6 No.2

Digitalis lanata 세포배양에서의 생물학적 변환에 의한 digoxin 생산에 있어 세포고정화가 미치는 영향을 조사하기 위하여 폴리우레탄 거품기질과 Ca-알지네이트를 비교하였다. 폴리우레탄 거품기질에 의한 고정화는 세포의 생장에 큰 영향을 미치지 않았으나 Ca-알지네이트에 고정화된 세포는 생장이 크게 억제되는 결과를 보였다. Digitoxin 투여 농도를 200㎎/ℓ로 하여 digoxin 생산량을 측정한 결과 현탁세포의 경우 투여한 지 1일째에서 최대농도인 51.12㎎/ℓ가 생산된 반면 거품기질 고정화세포에서는 2일째에 최대농도인 52.37㎎/ℓ가 생산되는 것으로 보아 세포고정화의 장점을 이용할 수 있는 가능성율 보였다. 그러나, Ca-알지네이트에 고정화된 세포에서는 2일째에 최대 25.43㎎/ℓ만이 생산되는데에 그쳤다. Digitoxin 농도를 100, 200, 400㎎/ℓ로 달리하여 투여하였을 때 폴리우레탄 거품기질 고정화세포의 경우 200㎎/ℓ까지는 현탁세포와 비슷한 양의 digoxin을 생산하나 400㎎/ℓ에서는 현탁세포와는 달리 digoxin 생산량이 더 이상 증가하지 않아 고농도의 기질 첨가는 피해야 함을 알 수 있었다. Ca-알지네이트에 고정화된 세포는 전반적으로 현탁세포나 폴리우레탄 거품기질 고정화 세포에 비해 현저히 낮은 농도의 digoxin을 생산하였다. A comparative study on the cultivation of Digitalis lanata suspension cells in polyurethane foam matrix and Ca-alginate gel was performed to investigate the effects of immobilization on the production of digoxin from digitoxin by biotransformation. While polyurethane foam immobilization did not affect cell viability, the growth of Ca-alginate entrapped cells was considerably inhibited. When 200㎎/ℓ of digitoxin was added, maximum digoxin production of 51.12㎎/ℓ was achieved at the first day of biotransformation in free cell suspensions. On the other hand, maximum digoxin production was 52.37㎎/ℓ in polyurethane foam entrapped cell cultures after 2 days of biotransformation. This result suggests that the utilization of potential advantages of immobilization technique is feasible. Maximum digoxin production in Ca-alginate entrapped cells was, however, only 25.43㎎/ℓ after 2 days of biotransformation. The reason for this low yield was probably due to the low cell growth and viability caused by Ca-alginate immobilization. It was also found that the cells immobilized in polyurethane foam matrix produced much less digoxin compared to free cell suspensions with addition of 400㎎/ℓ of digitoxin, even though the digoxin productivities of both cultures were almost the same in the case when digitoxin addition was below 200㎎/ℓ. It can be thus concluded that the addition of high concentration of substrate should be prevented for immobilized cells.

국내제작 임프란트 고정체와 지대주 유지나사의 적합도에 대한 주사전자현미경적 비교연구

박영선,방몽숙,이석형,Park Young-Sun,Vang Mong-Sook,Lee Seok-Hyung 대한치과보철학회 2004 대한치과보철학회지 Vol.42 No.1

Statement of problem : Several domestic dental implants have been developed since dental treatment being implants are increasing and popularized. However, they have not been used in domestic market like imported goods. Material and methods : This study was carried out to compare domestic and imported implants in aspect of fitness, dental implant fixture and abutment screw using scanning electron microscope. All experiments were performed under dry condition. Results : 1. Only in aspect of relation of dental implant fkxture and abutment screw, except only one group with point contact, good fitness was existed. 2. Home products must presevere in their efforts, so as excellent to fit.

논문편 : 대구지역 초등학교 급식시설 환경실태 및 운영 만족도

박영선,정준현 ( Young Sun Park,Jun Hyun Jeong ) 대한가정학회 1996 Human Ecology Research(HER) Vol.34 No.4

구조최적설계시 근사법의 정확도를 이용한 이동한계 전략의 개발

박영선,박경진,Park, Young-Sun,Park, Gyung-Jin 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.8

The move limit strategy is used to avoid the excessive approximation in the structural optimization. The size of move limit has been obtained by engineering experience. Recently, efforts based on analytic methods are performed by some researchers. These methods still have problems, such as prematurity or oscillation of the move limit size. The existing methods usually control the bound of design variables based on the magnitude. Thus, they can not properly handle the configuration variables based on the geometry in the configuration optimization. In this research, the size of move limit is calculated based on the accuracy of approximation. The method is coded and applied to the two-point reciprocal quadratic approximation method. The efficiency is evaluated through examples.

기능성 소화불량증 환자의 두통은 위 운동성 장애에 의한 증상이 될 수 있는가?

박영선,윤상협,Park, Young-Sun,Yoon, Sang-Hyub 대한한방내과학회 2009 大韓韓方內科學會誌 Vol.30 No.3

Objectives : The aim of this study was to investigate the relationship between headache and gastric dysmotility in patients with functional dyspepsia by using electrogastrogram and bowel sounds analysis. Methods : 127 patients(male 40, female 87) with functional dyspepsia were enrolled. By using inquiry and the questionnaire, we examined whether each patient had headache and abdominal pain. All patients were divided into 4 groups according to the above symptoms. Gastric motility was measured during the fasting-postprandial state by using electrogastrogram and bowel sounds analysis. Results : 33 patients complained of headache. There was a significant difference between headache patients and non-headache patients in gastric arrhythmia of the fasting state. Moreover, in headache patients without abdominal pain, postprandial improvement of gastric arrhythmia was poorer than the other groups. So, headache patients without abnormal pain had more severe gastric myoelectrical rhythm disorder than headache patients with abdominal pain. Conclusion : Headache could be one of symptoms induced by gastric dysmotility in patients with functional dyspepsia. Especially, headache in functional dyspepsia was related to gastric arrhythmia.

아파트 단지 내 휘트니스 시설의 이용자수에 따른 적정 시설과 공간규모에 관한 연구 - 천안시 4개 아파트 단지를 대상으로 -

박영선,유수훈,Park, Young-Sun,Ryu, Soo-Hoon 한국주거학회 2008 한국주거학회 논문집 Vol.19 No.6

A fitness facility in an apartment complex is not a simple sports facility. It has important roles in improving the residents' physical and mental health, and in forming a sense of community. This study analyzed the number of users in the fitness facility of the apartment complex, which is a significant criterion in determining the dimension. A comparative analysis between the past and the present function and dimension was performed in finding out the optimal solutions. In conclusion, the number of users in the fitness facility is influenced not by the number of households in the complex but by the facility's size and creating a desired environment. The users' favorite sports equipments were figured out to meet those needs. Moreover, comparing the facilities' size, user satisfaction, area per person, an optimal dimension for the facility, and rates of equipments were found out.

PGMCC의 공정성 향상

박영선,현도원,장주욱,Park, Young-Sun,Hyun, Do-Won,Jang, Ju-Wook 한국정보처리학회 2003 정보처리학회논문지 C : 정보통신,정보보안 Vol.10 No.3

본 논문은 멀티캐스트 혼잡제어방식 제안 중의 하나인 PGMCC의 공정성 향상 방법에 관한 것이다. 안정적인 멀티캐스트 전송과 혼잡제어를 위한 여러 가지 방법중에서 PGMCC는 유력한 방식으로 제안되었다. 하지만 PGMCC에도 고정된 타임 아웃 값의 사용과 불확실한 Acker 선출 등 공정성을 낮추는 요인들이 몇 가지 지적되고 있다. 본 논문에서는 타임 아웃 값을 네트워크 상황에 맞추어 적응적으로 가변시키고, 라우터에서의 쓰루풋 비교를 통한 선택적인 NAK 억압이라는 Acker 선출 방법을 도입하여 이와 같은 문제를 해결하여 공정성이 향상되는 것을 보인다. To deploy multicast protocols, fairness to current Internet traffic, particularly TCP, is an important requirement. PGMCC is one of the most promising multicast congestion control proposals but it suffers from degradation of fairness by fixed timeout and uncertain acker selection. In this paper, we suggest addition of an adaptive timeout mechanism and NAK suppression in router using throughput comparison to improve fairness. Our simulation show improved fairness.