• Advances in Computational Design
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• 제4권2호
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• pp.73-90
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• 2019

The growth in the number of single-member households is a critical issue worldwide, especially among the elderly. For those living alone, who may be unaware of their health status or routines that could improve their health, a continuous healthcare monitoring system could provide valuable feedback. Assessing the performance adequacy of activities of daily living (ADL) can serve as a measure of an individual's health status; previous research has focused on determining a person's daily activities and extracting the most frequently performed behavioral patterns using camera recordings or wearable sensing techniques. However, existing methods used to extract common patterns of an occupant's activities in the home fail to address the spatio-temporal dimensions of human activities simultaneously. Though multiple sequence alignment (MSA) offers some advantages - such as inherent containment of the spatio-temporal data in sequence format, and rapid identification of hidden patterns - MSA has rarely been used to extract in-home ADL routines. This research proposes a method to extract a household occupant's ADL routines from a cumulative spatio-temporal data log of occupancy collected using a non-intrusive method (i.e., a tomographic motion detection system). The findings from an occupant's 28-day spatio-temporal activity log demonstrate the capacity of the proposed approach to identify routine patterns of an occupant's daily activities and to reveal the order, duration, and frequency of routine activities. Routine ADL patterns identified from the proposed approach are expected to provide a basis for detecting/evaluating abrupt or gradual changes of an occupant's ADL patterns that result from a physical or mental disorder, and can offer valuable information for home automation applications by enabling the prediction of ADL patterns.

• Journal of information and communication convergence engineering
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• 제15권3호
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• pp.182-186
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• 2017

Maintaining a proper lookout activity routine is integral to preventing ship collision accidents caused by human errors. Various subjective measures such as interviewing, self-report diaries, and questionnaires have been widely used to monitor the lookout activity patterns of navigators. An objective measurement of a lookout activity pattern classification system is required to improve lookout performance evaluation in a real navigation setting. The purpose of this study was to develop an objective navigator lookout activity classification system using wearable accelerometers. In the training session, 90.4% accuracy was achieved in classifying five fundamental lookout activities. The developed model was then applied to predict real-lookout activity in the second session during an actual ship voyage. 86.9% agreement was attained between the directly observed activity and predicted activity. Based on these promising results, the proposed unobstructed wearable system is expected to objectively evaluate navigator lookout patterns to provide a better understanding of lookout performance.

• Journal of Korean Society for Atmospheric Environment
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• 제10권E호
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• pp.299-302
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• 1994

At a nuclear power plant, environmental radioactivity monitoring is routine work for the radiation safety management For the environmental monitoring of tritium($^3$H) activity in water sampled liquid scintillation counting( LSC) method is applied to measure low- energy beta activity from tritium in the samples. The $^3$H activity is measured using the BECKMAN 5801 system at the KRISS( Korea Research Institute of Standards and Science) for evaluating the lower limits of detection( LLD) of $^3$H measurement and the measuring capability of low-level $^3$H activity at four nuclear Power Plant sites. The LSC systems used for low-level $^3$H activity measurements at the nuclear Power Plants are confirmed to satisfy throughout an intercomparison study under the experimental arrangements by the KRISS.

• 대한수의학회지
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• 제27권1호
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• pp.153-155
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• 1987

Determination of cholinesterase activity is a routine practice in many laboratories to detect the influence of cholinesterase inhibiting drugs such as organophosphate and carbamate insecticides. Among many different methods to determine the cholinesterase activity, the present method was the most recent, simple and accurate one for routine test in clinics. The results obtained in sera of human and the different species of animals by means of the present method were as follows: $5.76{\pm}1.12U/ml$ in human, $3.37{\pm}0.83U/ml$ in german shepherd, $0.61{\pm}0.18U/ml$ in rat, $14.91{\pm}3.10U/ml$ in mouse, $1.55{\pm}0.51U/ml$ in chicken, $0.28{\pm}0.11U/ml$ in slaughtered cattle and $0.50{\pm}0.10U/ml$ in slaughtered pig.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제34권1호
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• pp.21-29
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• 2023

This paper reviews the global effect of the coronavirus disease 2019 (COVID-19) pandemic on the mental health of children and adolescents in South Korea, the U.S., Japan, and China. We reviewed research on deteriorated mental health, including increased suicide, suicidal thoughts, and self-harm. Various studies have shown that students' mental health issues, such as depression and anxiety, have worsened during the COVID-19 pandemic. Furthermore, the number of students who committed suicide has significantly increased in the U.S. and Japan. Factors such as prior mental health status, change in daily routine, reduced physical activity, excessive screen time, overuse of electronic devices, and reduced social support have been reported to have a significant effect. The chain of deteriorating mental health among the youth began at the onset of COVID-19, social distancing, and school closure. As youths began to stay at home instead of going to school, they lost opportunities to connect with their friends or teachers, who could provide support outside of their homes. Young people spent less time on physical activity and more time online, which damaged their sleeping schedule and daily routine. In preparing for the post-pandemic phase, we should thoroughly analyze the long-term effects of the pandemic on youth mental health, while simultaneously tackling current imminent issues.

• Animal Bioscience
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• 제37권2호
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• pp.253-260
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• 2024

Objective: The objectives of the present study were to evaluate the effects of once-a-day milk feeding on growth performance and routine behavior of preweaning dairy calves. Methods: At 22nd day of age, twenty-four Holstein calves were randomly assigned to one of two treatment groups (n = 12/treatment) based on milk feeding frequency (MF): i) 3 L of milk feeding two times a day; ii) 6 L of milk feeding once a day. The milk feeding amount was reduced to half for all calves between 56 and 60 days of age and weaning was done at 60 days of age. To determine the increase in weight and structural measurements, each calf was weighed and measured at 3 weeks of age and then at weaning. The daily behavioral activity of each calf was assessed from the 22nd day of age till weaning (60th day of age) through Nederlandsche Apparatenfabriek (NEDAP) software providing real-time data through a logger fitted on the calf's foot. Results: There was no interaction (p≥0.17) between MF and sex of the calves for routine behavioral parameters, body weight and structural measurements. Similarly, there was no effect of MF on routine behavioral parameters, body weight and structural measurements. However, the sex of the calves affected body weight gain in calves. Male calves had 27% greater total body weight and average daily gain than female calves. There was no effect of the sex of the calves on behavioral measurements. Collectively, in the current study, no negative effects of a once-a-day milk feeding regimen were found on routine behavioral and growth parameters of preweaning calves in group housing. Conclusion: Once-a-day milk feeding can be safely adopted in preweaning calves from 22nd day of age.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2000년도 춘계학술발표대회
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• pp.365-369
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• 2000

반응기의 performance를 결정하는 중요한 요소는 methane 생성균의 활성을 측정하는 것이다. Methanogen의 활성을 측정하는 방법으로 SMA가 유일하게 사용되고 있다. 따라서 본 연구에서는 methanogen의 활성을 측정하는 다른 대안으로 CLSM image의 정량 분석 방법을 확립하였다. CLSM의 결과는 약 5시간 안에 얻을 수 있을 뿐만 아니라, 분자 생물학적인 기술을 많이 요하지 않는다. 또한, sludge내부의 상태와 methanogen의 분포정도를 사진으로 볼 수 있는 장점이 있다. 따라서 SMA와 함께 CLSM image 정량 분석은 UASB반응기의 start-up 동안의 methanogen의 활성을 측정하기 위한 유용한 방법으로 제안할 수 있다.

• 생약학회지
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• 제32권3호통권126호
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• pp.253-256
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• 2001

The present study was designed for the improvement of routine measurement of superoxide and hydroxyl radical scavenging activities utilized by a microplate reader. Superoxide radical scavenging activity by the ascorbic acid, which is a well-known superoxide scavenger, was determined in a dose-dependent manner. Hydroxyl radical scavenging activity by the thiourea, which is a well-known hydroxyl radical scavenger, was also well detected in a dose-dependent manner. Our results suggest that the use of microplate reader to assay the superoxide and hydroxyl radical scavenging activities improves the accuracy of data and enables the use of much smaller amounts of samples and/or reagents, with much simpler experimental procedure. Therefore, These methods appear to be suitable for screening of superoxide and hydroxyl radical scavenging activities in both the plant medicinal extracts and the isolated compounds.

• Journal of Oral Medicine and Pain
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• 제34권3호
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• pp.303-316
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• 2009

본 연구는 긴장성 두통이 있는 측두하악장애 환자의 성별에 따른 양상을 평가하기 위하여 시행되었다. 경희대학교 치과대학 병원 구강내과에 내원한 환자 중 긴장성 두통을 동반하거나 동반하지 않은 측두하악장애 환자를 대상으로 연구가 시행되었다. 긴장성 두통을 동반한 측두하악장애 환자 60명을 실험군, 긴장성 두통을 동반하지 않는 측두하악장애 환자 111명을 대조군으로 하여 통증의 질과 강도, 양측성 유무 그리고 일상생활에서의 증감 유무 등을 관찰하고 통계 처리하여 다음과 같은 결과를 얻었다. 1. 긴장성 두통이 없는 측두하악장애 환자에서 통증의 질은 성별 차이가 있었지만(p=0.04), 긴장성 두통이 있는 측두하악장애 환자에서는 성별 차이가 없었다. 2. 긴장성 두통이 없는 측두하악장애 환자에서 통증의 강도는 성별 차이가 없었고, 긴장성 두통이 있는 측두하악장애 환자에서도 성별 차이가 없었다. 3. 긴장성 두통이 없는 측두하악장애 환자에서 통증의 양측성 유무는 성별 차이가 없었고, 긴장성 두통이 있는 측두하악장애 환자에서도 성별 차이는 없었다. 4. 긴장성 두통이 없는 측두하악장애 환자에서 일상생활에 따른 통증의 증가 유무는 성별 차이가 없었고, 긴장성 두통이 있는 측두하악장애 환자에서도 성별 차이가 없었다. 따라서, 긴장성 두통이 없는 측두하악장애 환자의 통증의 질에서는 성별 차이가 있었지만 긴장성 두통이 있는 경우에는 성별 차이가 없었기 때문에 긴장성 두통이 있는 환자를 진료할 때는 남성과 여성이 비슷한 통증의 질을 가지고 있음을 고려해야 한다.

• Journal of Oral Medicine and Pain
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• 제34권1호
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• pp.103-114
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• 2009

긴장성 두통이 있는 측두하악장애환자의 연령에 따른 통증의 양상을 관찰하고자 국제두통학회의 진단기준에 부합되는 긴장성 두통이 있는 측두하악장애환자 170명을 실험군으로 하고, 긴장성 두통이 없는 측두하악장애환자 222명을 대조군으로 하여 통증의 질과 강도, 양측성 유무 그리고 일상생활에서의 증감 유무 등을 관찰하고 통계 처리하여 다음과 같은 결과를 얻었다. 1. 긴장성 두통이 없는 측두하악장애 환자에서 통증의 질은 연령별 차이가 없었지만, 긴장성 두통이 있는 측두하악장애 환자에서는 연령별 차이가 있었다(p=0.042). 2. 긴장성 두통이 없는 측두하악장애 환자에서 통증의 강도는 연령별 차이가 있었고(p=0.00), 긴장성 두통이 있는 측두하악 장애 환자에서도 연령별 차이가 있었다(p=0.004). 3. 긴장성 두통이 없는 측두하악장애 환자에서 통증의 양측성 유무는 연령별 차이가 없었고, 긴장성 두통이 있는 측두하악장애 환자에서도 연령별 차이는 없었다. 4. 긴장성 두통이 없는 측두하악장애 환자에서 일상생활에 따른 통증의 증가 유무는 연령별 차이가 없었고, 긴장성 두통이 있는 측두하악장애 환자에서도 연령별 차이가 없었다. 연령별 차이는 긴장성 두통이 있는 경우와 없는 경우 동일하게 통증의 강도에서는 있었고, 양측성 유무 그리고 일상생활 유무에서는 없었지만, 긴장성 두통이 없는 측두하악장애 환자의 통증의 질에서는 연령별 차이가 없었지만 긴장성 두통이 있는 경우에는 연령별 차이가 있기 때문에 긴장성 두통이 있는 환자를 진료할 때는 연령에 따른 통증의 질과 강도를 고려해야 하며, 이에 따른 추가적이고 지속적인 연구가 필요하리라고 사료된다.