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3축 가속도 센서 기반 인간 행동 인식을 위한 기계학습 분석
이송미,조희련,윤상민,Lee, Song-Mi,Jo, Hui-Ryeon,Yun, Sang-Min 한국통신학회 2016 정보와 통신 Vol.33 No.10
최근 스마트폰의 이용 사례가 증가함에 따라, 스마트폰에 내장되어 있는 다양한 센서를 이용하여 인간의 행동을 인식하기 위한 연구가 많은 각광을 받고 있다. 본고에서는 인간의 기본적인 행동 중에 앉기, 걷기, 달리기 등의 행동 특성을 스마트폰에 내장되어 있는 3축 가속도 센서를 통하여 분석하고 인간의 기본적 행동을 자동으로 인식하기 위한 방법에 대하여 비교 분석하는 것을 목적으로 한다. 구체적으로는 스마트폰에 내장되어 있는 3차원 가속도 센서로부터 추출된 데이터를 시간축에서 샘플링하여 인간의 행동을 인식하기 위한 기댓값 최대화 알고리즘, 랜덤 포레스트, 딥러닝 기반의 기계학습 방법을 비교하여 각 기계학습 알고리즘의 장단점을 분석한다.
활성탄의 포어구조 특성에 따른 CDI 성능에 관한 연구
이송미(Song Mi Lee),이선호(Seon Ho Lee),박승주(Seungjoo Park),이규상(Gyusang Lee),정두환(Doo-Hwan Jung) 한국환경에너지공학회 2022 한국열환경공학회 학술대회지 Vol.2022 No.2
Activated carbon is used in various fields such as wastewater treatment, air purification, and capacitor electrode material. This is due to the pore properties of activated carbon, and various studies have been conducted for this purpose. Activated carbon generally consists of micropores of 2 run or less, mesopores of 2- 50 run, and macropores of 50 run or more. In this study, in order to use activated carbon as a CDI electrode material, activated carbon was prepared from a precursor. The prepared activated carbon had any effect on the CDI desalination performance, and the salt adsorption capacity and long-term durability were evaluated.
저당질고지방-경장영양액이 뇌손상 후 환자의 혈당 조절에 미치는 영향: A Pilot Study
이송미 ( Song Mi Lee ),김선정 ( Sun Jeong Kim ),정혜경 ( Hye Kyung Chung ),전주혜 ( Joo Hye Jeon ),이보담 ( Bo Dam Lee ),홍창기 ( Chang Ki Hong ),박종숙 ( Jong Sook Park ),장철호 ( Chul Ho Chang ) 한국정맥경장영양학회 2011 한국정맥경장영양학회지 Vol.4 No.1
Purpose: Hyperlycemia after brain injury is known to be a risk factor that is correlated with hospital infection, mortality and the length of the hospital stay. There have been some reports about the use of a reduced-carbohydrate, modified high fat enteral formula for improving the blood glucose control and clinical outcomes of patients with type 2 diabetes. This pilot study evaluated the glucose control of brain-injured patients who were admitted into the neurointensive care unit (NCU) and they received either standard formula or high fat formula. Methods: Fourteen subjects were collected and they were divided into the experimental (high fat formula) and the control (standard formula) groups. We investigated the blood glucose levels, the total dose of insulin used, the number of patients who received insulin, the rate of hospital infection, the number of hospital days, the number of NCU days, the days of mechanical ventilation, the body mass index and the mental status of the subjects. Results: The hospital infection rate of the control group was higher than that of the experimental group, but the daily blood glucose level, the number of patients who received insulin and the total dose of insulin used were not statistically different between the two groups. The number of hospital days, the number of NCU days and the days on mechanical ventilation or the number of patients on mechanical ventilation were lower in the experimental group than that in the control group, but there were no statistically significant differences. Conclusion: These results suggest that the use of high fat enteral formula as compared to standard formula may decrease the hospital infection rate in critically ill patients after brain injury. But high fat formula did not have beneficial effects on the blood sugar level and insulin dosage. (JKSPEN 2011;4(1):21-26)
한국 중년기 및 노년기 심장질환자들에서의 “Modified DASH Diet” 영양교육 프로그램의 효과
이송미(Song-Mi Lee),정혜경(Hye-Kyung Chung),강주희(Ju-Hee Kang),윤영원(Young-Won Yoon),김현승(Hyun-Seung Kim) 대한임상노인의학회 2004 대한임상노인의학회지 Vol.5 No.2
배경 및 목적: 본 연구는 한국 중년기 및 노인기 심혈관질환자를 대상으로 저염 식사 및 체중 조절식사의 원칙이 적용된 “modified DASH diet”를 적용한 영양교육 프로그램을 시행하여 혈청 지질 수준, 24시간 소변 검사 및 식습관 평가를 시행하여 프로그램의 효과를 알아보고자 하였다. 방법: 53명의 심혈관 질환 환자를 대상으로 9주 동안 저콜레스테롤 식사교육, 저포화지방 식사교육, 저염 식사교육, 체중조절 식사교육으로 구성된 영양교육을 4차에 걸쳐 시행하였고 교육 전후로 인체계측 및 혈청 총 콜레스테롤, HDL 콜레스테롤, LDL 콜레스테롤, 중성지방을 측정하고 24시간 소변 분석을 통해 질소, 크레아티닌, 나트륨, 칼륨, 인 등을 측정하였다. 개발된 설문지를 사용하여 영양교육 전후로 식습관의 변화 및 영양교육 프로그램에 대한 만족도를 평가하였다. 조사가 완료된 환자는 26명이었다. 결과: 총 콜레스테롤, LDL 콜레스테롤, HDL 콜레스테롤, 중성지방은 감소되는 경향을 보였으나 통계적으로 유의적인 차이를 보이지는 않았다. 24시간 소변 분석 결과 나트륨은 유의적으로 감소되고 칼륨은 유의적으로 증가되었다. 2명을 제외한 모든 환자는 영양교육에 의해 식습관이 바람직하게 변화되었으며 환자의 96%가 영양교육 프로그램에 대해 만족하였다. 결론: 9주간의 “modified DASH diet”를 적용한 영양교육 프로그램 운영은 환자들의 식습관을 바람직하게 향상시켰으며 이는 24시간 소변 검사결과의 변화로 확인되었다. Cardiovascular disease has emerged as the leading cause of death during the last two decades in Korea. The most significant changes of risk factors in Korea might be the increment of serum cholesterol level and the dietary intake of sodium and saturated fat. The DASH (Dietary approach to stop hypertension) diet emphasizes intake of fruits, vegetables and low fat dairy products to lower saturated fat and cholesterol intake. We modified DASH diet for Korean middle-aged and elderly cardiovascular disease patient and carried out the hospital based diet education program. After the education program, patient's lipid profiles and urinary excretion of sodium, potassium, nitrogen and creatinine was analyzed. After dietary habit was improved, there were significant reduction of 24-hour urinary excretion of sodium, potassium and nitrogens. Although blood lipid profiles were not significantly reduced, but there were desirable changes. In conclusion, this modified DASH diet education program was helpful in the management of risk factors in cardiovascular disease patients.
국내 상급종합병원과 전국 분포 종합병원의 임상영양서비스 실태 조사 연구: 전국 규모 설문조사를 통하여
엄미향 ( Mi Hyang Um ),박유경 ( Yoo Kyung Park ),이송미 ( Song Mi Lee ),이승민 ( Seung Min Lee ),이은 ( Eun Lee ),차진아 ( Jin A Cha ),박미선 ( Mi Sun Park ),이호선 ( Ho Sun Lee ),라미용 ( Mi Yong Rha ),류은순 ( Eun Soon Lyu ) 대한영양사협회 2014 대한영양사협회 학술지 Vol.20 No.3
The purpose of this study was to investigate the status of clinical nutrition services provided at tertiary hospitals and general hospitals in Korea. In total, 157 questionnaires were distributed to the departments of nutrition at hospitals on September 2013. The results of this study are as follows. The median number of beds was 607 and average length of stay was 8 days. 63.1% of dietitians had over 5 years of career experience. Nutritional screening rate was 97% in tertiary hospitals but only 67.2% in general hospitals (P¼ 0.001). The rate of equipment with computerized nutritional screening system was 100% in tertiary hospitals but 71.9% in general hospitals (P¼0.001). Hospitals with the best regarding nutritional care were hospitals accredited by JCI (Joint Commission International). On the other hand, hospitals not accredited by the JCI but KOIHA (Korea Institute for Healthcare Accreditation) showed the lowest performance rate of nutritional care. Nutrition support teams (NSTs) were established in all tertiary hospitals but in only 73% of general hospitals (P¼0.001). The rate of actively operating NSTs was 89% in tertiary hospitals but only 62% in general hospitals (P¼0.001). There is a need to provide proper standardized clinical nutrition services as a primary treatment and we observed large variations in the quality of nutritional service between hospitals. Therefore, local solutions are needed to implement nutritional programs and policies for improved service and care.