• Smart Structures and Systems
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• 제29권4호
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• pp.561-576
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• 2022

Heritage timber structures represent the history and culture of a nation. These structures have been inherited from previous generations; however, they inevitably exhibit deterioration over time, potentially leading to structural deficiencies. Structural Health Monitoring (SHM) offers the potential to assess operational anomalies, deterioration, and damage through processing and analysis of data collected from transducers and sensors mounted on the structure. This paper reports on the design and implementation of a long-term SHM system on the Feiyun Wooden Pavilion in China, a three-story timber building built more than 500 years ago. The principles and features of the design and implementation of SHM systems for heritage timber buildings are systematically discussed. In total, 104 sensors of 6 different types are deployed on the structure to monitor the environmental effects and structural responses, including air temperature and humidity, wind speed and direction, structural temperatures, strain, inclination, and acceleration. In addition, integrated data acquisition and transmission subsystem using a newly developed software platform are implemented. Selected preliminary statistical and correlation analysis using one year of monitoring data are presented to demonstrate the condition assessment capability of the system based on the monitoring data.

• 여성건강간호학회지
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• 제28권2호
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• pp.145-153
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• 2022

Purpose: This study aimed to investigate the influencing factors of breast cancer recurrence by comparing the risk factors and lifestyle patterns related to breast cancer in Korean women with and without recurrence. Methods: This cross-sectional survey comprised 241 Korean women diagnosed with breast cancer who had received follow-up treatment. Participants were recruited from a university hospital in Seoul and an online social media platform for breast cancer patients. Data were collected either via online or a paper survey, using a structured questionnaire that included general and disease-related characteristics and lifestyle behaviors. Data were analyzed using descriptive statistics, univariate analysis, and logistic regression. Results: Recurrence of breast cancer was influenced by four factors; childbirth experience, consumption of green/yellow vegetables, drinking behavior, and recovery from fatigue after sleep. Prevalence of recurrent breast cancer was associated with no childbirth experience (OR=2.29, p=.010), fewer green/yellow vegetables (OR=0.71, p=.008), drinking behavior (OR=0.24, p=.001), and a lower level of recovery from fatigue after sleep (OR=0.51, p<.001). Conclusion: Aside from having experienced childbirth, this study identified several modifiable factors that influence breast cancer recurrence. Increasing green/ yellow vegetable intake, alleviating fatigue, and reducing alcohol intake are important. Intervention strategies in clinical research and practice can be applied to address risk factors and reduce the prevalence of recurrent breast cancer.

• 한국안전학회지
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• 제38권1호
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• pp.42-54
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• 2023

Mobile scaffold is used as a work platform in construction sites. According to industrial accident data, 10 fatalities occur annually on average due to falling from mobile scaffold in construction sites. To prevent such fatal accidents, safety standards must be improved by analyzing the causes of fatal accidents related to mobile scaffold. Accordingly, we analyzed domestic and international safety standards for mobile scaffold and analyzed the fatalities (117 persons) caused by mobile scaffold accidents in domestic construction sites during 2011-2020 and found that fall, overturn, and collapse accounted for 88% (103 persons), 10.3% (12 persons), and 1.7% (2 persons) of fatalities, respectively. The main causes of fatal accidents were found to be non-installation or insufficient installation of safety rails and outriggers and incorrect sequence of work. Based on the analysis results, we proposed strategies for improving the safety standards, such as the use of advanced guard rails and wheel-attached outriggers, to enhance the safety and field applicability of the mobile scaffold. Technology development and improvements in the safety standards for the use of mobile scaffold will aid in the prevention of fatal accidents caused by mobile scaffold.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.321-322
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• 2022

최근 헬스케어 분야에서 건강 관리 주제가 많이 다루어지고 있다. 특히 운동 분야에 서비스가 집중되고 있으며 4차산업기반 기술이 융합된 운동기구 또한 많으 등장하고 있다. 일반적으로 운동기구에 다양한 센서를 탑재하여 사용자의 운동 정보를 수집하고 이를 기반으로 서비스를 연계하는 형태가 대표적이다. 본 논문에서는 기구에서 발생하는 운동데이터를 블루투스 기반의 IoT 센서를 통해 스마트폰으로 전송하고 이를 다시 운동 정보 분석 플랫폼으로 전달하는 과정에서의 설계를 기반으로 효율적인 데이터 전송에 대해 제안한다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2023년도 제68차 하계학술대회논문집 31권2호
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• pp.309-311
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• 2023

본 논문에서는 만성질환자 건강관리서비스 플랫폼 개발을 위항여 건강측정기 모바일 연계기술 개발 및 적용하고 IoT 기반 생체정보 획득 및 라이프로그 건강관리 플랫폼 API 연계 기술을 통하여 지역 만성질환자를 위한 언택트 헬스 모니터링 플랫폼 개발을 수행하였다. 해당 시스템을 통하여 지역 보건소 협력 및 가족 중심 만성질환자 입체적 건강관리 모니터링 시스템 개발에 적용하고 IoT 장비 인터페이스기술, 개인 건강관리기술, 플랫폼 운영 및 구현기술, 데이터 관리기술 개발을 통하여 효율적으로 개인 라이프로그를 활용할 수 있도록 하였으며, 효율적인 관리를 위하여 AI 챗봇 서비스 시스템을 통한 효율성을 극대화를 추진하였다. 본 논문에서는 개인 라이프로그를 활용한 AI 챗봇 기반 만성질환자 건강관리서비스 플랫폼을 구현하여 만성질환자에 대한 서비스를 제공하고 만족도를 실증하여 서비스의 우수함을 입증하였다.

• Journal of Animal Science and Technology
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• 제65권5호
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• pp.1105-1109
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• 2023

Pedi coccus acidilactici CACC 537 was isolated from canine feces and reported to have probiotic properties. We aimed to characterize the potential probiotic properties of this strain by functional genomic analysis. Complete genome sequencing of P. acidilactici CACC 537 was performed using a PacBio RSII and Illumina platform, and contained one circular chromosome (2.0 Mb) with a 42% G + C content. The sequences were annotation revealed 1,897 protein-coding sequences, 15 rRNAs, and 56 tRNAs. It was determined that P. acidilactici CACC 537 genome carries genes known to be involved in the immune system, defense mechanisms, restriction-modification (R-M), and the CRISPR system. CACC 537 was shown to be beneficial in preventing pathogen infection during the fermentation process, help host immunity, and maintain intestinal health. These results provide for a comprehensive understanding of P. acidilactici and the development of industrial probiotic feed additives that can help improve host immunity and intestinal health.

• 한국환경보건학회지
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• 제43권1호
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• pp.71-76
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• 2017

Objectives: This study aimed to assess the environmental factors that affect particulate matters (PM10) and to compare with outdoor PM10 concentrations in an underground subway stations. Methods: The PM10 level was determined from May 2013 to September 2013 in the Seoul subway stations in four lines. PM mini-vol portable sampler sampler was used to collect PM10 for 6 hrs. Arithmetic means of PM10 concentrations with standard deviation (SD) were calculated. Paired t-test was used to compare the differences between indoor PM10 and outdoor PM10 concentrations with correlation analysis which was used to identify the association between indoor PM10 concentrations and environmental factors. Results: There were no different PM10 concentrations significantly between line 1, 2, 3 and 4 in an underground subway stations. Passenger number was positively associated with PM10 concentration while construction year was negatively associated with PM10 concentrations. Indoor PM10 concentrations were significantly higher than those in outdoor PM10 concentrations. PM10 concentrations were higher in the stations which were constructed before 1990s rather than the stations constructed after 1990s. Conclusion: PM10 levels in the underground subway stations varied greatly depending on the construction year. Therefore, it might need to be more careful management to the stations which constructed in before 1990s.

• The Journal of Korean Physical Therapy
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• 제27권1호
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• pp.43-49
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• 2015

Purpose: The aim of the current study was to examine the effects of hinged ankle-foot orthosis (HAFO) on walking function in children with spastic diplegic cerebral palsy (CP). Methods: Thirty-two children (mean age: $6.79{\pm}0.35years$, age range: 5-7 years) who were diagnosed with spastic diplegic cerebral palsy participated in the study. Each subject typically walked through 10 meters of a gait platform with markers on the subject's proper body segments and underwent 3-D motion analysis system with and without hinged ankle-foot orthosis. The HAFOs were all custom-made for individual CP children and had plantarflexion stop at $0^{\circ}C$ with no dorsiflexion stop. The interventions were conducted over three trials in each group, and measurements were performed on each subject by one examiner in three trials. 3-D motion analysis system was used to measure gait parameters such as walking velocity, cadence, step-length, step-width, stride-length, and double support period in two conditions. Results: The walking velocity, cadence, step-length, and stride-length were significantly greater for the HAFO condition as compared to the no HAFO condition (p<0.05). However, no significant difference in step-width and double support period was observed between two conditions. Conclusion: These findings suggest that using the HAFO during walking would suggest positive evidence for improving the spatiotemporal parameters of gait in children with spastic diplegic cerebral palsy.

• 한국대기환경학회지
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• 제27권6호
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• pp.692-702
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• 2011

For more effective indoor radon reduction policy and technique, we researched radon data analysis for some buildings in Seoul. Those buildings were categorized as dwelling, underground and office space and the variations of radon concentration and its sources were evaluated. The variations of radon concentrations of indoor space of buildings for a day were patterned specifically by dwelling habits and different environment. As for the new built apartments which were not yet moved in, their indoor radon concentrations were showed more than 3 times after applying interior assembly, and were 5 times higher than ones of rather old residences. As for the subway stations, the radon concentrations during off-run times were about 15% higher than run-times. 10% of radon seemed to be reduced by installation of platform screen doors. As for office space, radon concentrations during working hours were about 2.5 times higher than non-working hours. Plaster board are expected as a main source of radon for them. By radon measurement method for long-term, its data can be over estimated because it covers non-active time in office or public space. Therefore combination of short and long-term measurement method is required for effective and economic reduction. Furthermore importance of ventilation is requested as public information service for all dwelling space. And also standardization for radium content or radiation of radon is necessary.

• 문화기술의 융합
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• 제9권6호
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• pp.263-272
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• 2023

최근 대학생들 사이에서 짧은 비디오가 크게 인기를 얻고 있으며, 이는 정보 공유와 자기표현의 효과적인 플랫폼으로 작용하고 있다. 동시에 새로운 문화도 조성하고 있다. 그러나 이러한 미디어의 과도한 소비는 집중력 감소와 정보 과부하 같은 부정적인 효과를 초래할 수 있어, 균형 잡힌 이용과 자제력이 요구될 것이다. 이에 본 연구는 쇼츠 영상 매체의 다양한 특성이 대학생들의 학교에 대한 조직 몰입과 정신건강에 어떤 영향을 미치는지 연구하였다. 연구 결과, 접근성과 즉시성 같은 특징이 다양한 참여 형태에 긍정적인 영향을 미칠 수 있으며, 정서적 몰입이 학생들의 정신건강에도 큰 영향을 미친다는 사실이 확인할 수 있었다. 이러한 결과는 쇼츠 영상 매체를 신중하게 활용함으로써 대학생들의 정신건강에 긍정적인 효과를 가져올 수 있다는 점을 제시하고자 한다.