• Smart Structures and Systems
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• 제6권5_6호
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• pp.423-438
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• 2010

Wireless smart sensors enable new approaches to improve structural health monitoring (SHM) practices through the use of distributed data processing. Such an approach is scalable to the large number of sensor nodes required for high-fidelity modal analysis and damage detection. While much of the technology associated with smart sensors has been available for nearly a decade, there have been limited numbers of fulls-cale implementations due to the lack of critical hardware and software elements. This research develops a flexible wireless smart sensor framework for full-scale, autonomous SHM that integrates the necessary software and hardware while addressing key implementation requirements. The Imote2 smart sensor platform is employed, providing the computation and communication resources that support demanding sensor network applications such as SHM of civil infrastructure. A multi-metric Imote2 sensor board with onboard signal processing specifically designed for SHM applications has been designed and validated. The framework software is based on a service-oriented architecture that is modular, reusable and extensible, thus allowing engineers to more readily realize the potential of smart sensor technology. Flexible network management software combines a sleep/wake cycle for enhanced power efficiency with threshold detection for triggering network wide operations such as synchronized sensing or decentralized modal analysis. The framework developed in this research has been validated on a full-scale a cable-stayed bridge in South Korea.

• Psychiatry investigation
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• 제15권11호
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• pp.1071-1078
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• 2018

Objective We developed easily accessible imagery-based treatment program for patients with post-traumatic stress disorder (PTSD) related to workplace accidents and investigated the effects of the program on various PTSD related symptoms. Methods The program was based on an online platform and consisted of eight 15-min sessions that included script-guided imagery and supportive music. Thirty-five patients with workplace-related PTSD participated in this program 4 days per week for 4 weeks. Its effects were examined using self-report questionnaires before and after the take-home online treatment sessions. Results After completing the 4-week treatment program, patients showed significant improvements in depressed mood (t=3.642, p=0.001) based on the Patient Health Questionnaire-9 (PHQ-9), anxiety (t=3.198, p=0.003) based on the Generalized Anxiety Disorder seven-item (GAD-7) scale, and PTSD symptoms (t=5.363, p<0.001) based on the Posttraumatic Stress Disorder Check List (PCL). In particular, patients with adverse childhood experiences exhibited a greater degree of relief related to anxiety and PTSD symptoms than those without adverse childhood experiences. Conclusion The present results demonstrated that the relatively short online imagery-based treatment program developed for this study had beneficial effects for patients with workplace-related PTSD.

• 한국축산식품학회지
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• 제43권1호
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• pp.73-84
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• 2023

Campylobacteriosis is a common cause of gastrointestinal disease. In this study, we suggest a general strategy of applying gold nanoparticles (AuNPs) in colorimetric biosensors to detect Campylobacter in chicken carcass. Polymerase chain reaction (PCR) was utilized for the amplification of the target genes, and the thiolated PCR products were collected. Following the blending of colloid AuNPs with PCR products, the thiol bound to the surface of AuNPs, forming AuNP-PCR products. The PCR products had a sufficient negative charge, which enabled AuNPs to maintain a dispersed formation under electrostatic repulsion. This platform presented a color change as AuNPs aggregate. It did not need additional time and optimization of pH for PCR amplicons to adhere to the AuNPs. The specificity of AuNPs of modified primer pairs for mapA from Campylobacter jejuni and ceuE from Campylobacter coli was activated perfectly (C. jejuni, p-value: 0.0085; C. coli, p-value: 0.0239) when compared to Salmonella Enteritidis and Escherichia coli as non-Campylobacter species. Likewise, C. jejuni was successfully detected from artificially contaminated chicken carcass samples. According to the sensitivity test, at least 15 ng/μL of Campylobacter PCR products or 1×10³ CFU/mL of cells in the broth was needed for the detection using the optical method.

• 산업융합연구
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• 제21권9호
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• pp.23-32
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• 2023

게임을 통해 건강을 증진할 수 있는 건강 기능성 게임(SGHs)에 대한 관심이 고조되고 있다. 디지털 치료제(DTx)는 유효성과 안전성을 확보한 치료제이기 때문에 전통적인 의약품 유통방식을 따라야 하지만, SGHs는 웰니스 제품으로 DTx에 비해 보급과 확산이 유연하다. 또한 SGHs는 일시적인 치료 효과가 아닌 지속적인 모니터링과 피드백을 통해 맞춤형 서비스를 제공할 수 있어 효과적이며, SGHs를 인지장애치료나 행동교정 등에 적용할 경우 오작동과 부작용이 경미하다. 본 연구는 SGHs의 지각된 혜택과 위험을 동시에 고려하는 밸런스 프레임워크(Valence Framework)를 기반으로 142명의 학부생을 대상으로 설문을 수집하여 지각된 혜택만이 SGHs 사용 의도에 통계적으로 유의한 정(+)의 영향을 준다는 점을 실증하였다. 이러한 결과를 바탕으로 일반 사용자를 대상으로 한 SGHs 수용에 있어 혜택(유효성)을 중심으로 홍보하고, 데이터 주도형 (data-driven) 접근방법의 중요성과 데이터 주도형 유통 및 분석 플랫폼 전략의 필요하다는 시사점을 제시하였다.

• Journal of Veterinary Science
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• 제25권3호
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• pp.44.1-44.13
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• 2024

Importance: The emergence and rapid increase in the incidence of multidrug-resistant (MDR) bacteria in pig farms has become a serious concern and reduced the choice of effective antibiotics. Objective: This study analyzed the phylogenetics and diversity of antibiotic resistance genes (ARGs) and molecularly identified the source of ARGs in antibiotic-resistant Escherichia coli isolated from pig farms in Banten Province, Indonesia. Methods: Forty-four antibiotic-resistant E. coli isolates from fecal samples from 44 pig farms in Banten Province, Indonesia, were used as samples. The samples were categorized into 14 clusters. Sequencing was performed using the Oxford Nanopore Technologies MinION platform, with barcoding before sequencing with Nanopore Rapid sequencing gDNA-barcoding (SQK-RBK110.96) according to manufacturing procedures. ARG detection was conducted using ResFinder, and the plasmid replicon was determined using PlasmidFinder. Results: Three phylogenetic leaves of E. coli were identified in the pig farming cluster in Banten Province. The E. coli isolates exhibited potential resistance to nine classes of antibiotics. Fifty-one ARGs were identified across all isolates, with each cluster carrying a minimum of 10 ARGs. The ant(3'')-Ia and qnrS1 genes were present in all isolates. ARGs in the E. coli pig farming cluster originated mainly from plasmids, accounting for an average of 89.4%. Conclusions and Relevance: The elevated potential for MDR events, coupled with the dominance of ARGs originating from plasmids, increases the risk of ARG spread among bacterial populations in animals, humans, and the environment.

• 디지털융복합연구
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• 제16권9호
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• pp.229-237
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• 2018

최근 IoT, 인공지능의 발전에 따라 디지털 헬스케어 분야에 대한 관심이 증대되고 있다. 이에 본 연구에서는 디지털 헬스케어에 대한 특허분석을 통해 기술동향을 확인하고 국내외 기술경쟁력 및 키워드 분석을 통하여 향후 유망 분야를 제시하고자 한다. 이를 위하여 건강정보 측정기술, 건강관리 플랫폼 기술, 건강관리 원격서비스 기술을 분석대상 세부기술로 분류하고 이에 해당하는 국내외 특허 61,166건을 분석하여 전 세계 주요 특허청별 특허동향과 주요 출원인을 확인하였다. 또한 특허활동력, 주요시장 확보율, 특허 피인용도를 기반으로 세부기술별 기술경쟁력과 한국의 기술경쟁력을 분석한 결과, 전 세계 기술수준에 비하여 한국의 기술경쟁력이 저조한 것으로 파악되었다. 그리고 핵심키워드 분석을 통해 디지털 헬스케어의 핵심 유망분야를 예측한 결과 한국의 건강관리 플랫폼 기술에 대한 집중적인 육성전략이 필요한 것으로 도출되었다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.1022-1025
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• 2009

USN(Ubiquitous Sensor Network)은 u-city, u-Health 등과 같은 영역에서의 다양한 서비스를 통해 유비쿼터스 사회에서 u-life 실현을 가능하게 하는 핵심 인프라이다. 따라서 u-Life의 핵심 기술인 USN 기술에 대한 국내 표준화 확립을 위한 연구가 필요하다. 현재 USN에 대한 표준 현황은 센서 노드 구현을 위한 기술과 센서 노드들 사이의 에너지 효율적인 통신을 위한 프로토콜 및 기존의 망과 연동을 위한 기술 표준 및 연구가 대부분이다. 그러나 센서 네트워크와 USN 응용을 위한 이기종 센서 네트워크의 통합관리, 센싱 데이터 관리 및 USN 데이터베이스 구조 정의 등과 같은 응용 및 미들웨어 부분에서의 표준 및 연구는 아직 까지 미약한 수준이다. 이에 본 논문에서는 국내 센서 네트워크 서비스의 표준 개발 및 센서 응용 및 미들웨어 부분에서의 표준화된 플랫폼 기술을 위해 OGC(Open Geospatial Consortium)의 SWE(Sensor Web Enablement)를 구성하는 관련 표준 분석과, 국내 TTA(Telecommunications Technology Association) 관련 표준과 상호 연관성 및 OGC 기반 서비스 플랫폼 적용 가능성에 대한 분석을 통한 센서 네트워크상의 표준 서비스 플랫폼 아키텍처에 대한 연구를 하였다.

• 한국대기환경학회지
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• 제30권4호
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• pp.378-386
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• 2014

The use of bus stop in the center lane has reduced the emissions of exhaust gas on the road due to the improvement of the traffic speed but has caused a health problem for the citizens who are waiting for the bus in the platform, and thus the air pollution control of bus stop in the center lane is emerging as a more important part. This study was conducted to investigate the air pollution degree for the center lane-bus stops in four regions using mobile air measuring vehicle, and to evaluate the characteristics of air pollution by comparing with the data measured at the urban air monitoring site close to the bus stops. In addition, the correlation analysis was performed to analyze the impact to neighboring region by vehicle exhaust gas. The regional mean concentration of nitrogen dioxide in the center lane-bus stops ranged from 0.025 to 0.043 ppm which shows from 2.5 times to 5.3 times higher than the values of urban air monitoring site selected as a control group. The regional mean concentration of ozone in the center lane-bus stops ranged from 0.023 to 0.034 ppm which shows from 3% to 28% lower than the values of urban air monitoring site selected as a control group. The concentrations of nitrogen dioxide and ozone for the sampling regions did not exceed one hour-air quality environmental standard (0.1 ppm). The mean concentration of particulate matter for four center lane-bus stops was $28{\mu}g/m^3$ which shows about 27% higher than the values of urban air monitoring site selected as a control group, and that of particulate matter did not exceed one day-air quality environmental standard ($100{\mu}g/m^3$). In the results of correlation analysis between data from center lane-bus stops and data from urban air monitoring sites, the correlation coefficient (r) of nitrogen dioxide was relatively low as 0.316 to 0.416, and the correlation coefficient was high as the distance was close and vice versa. However, the correlation coefficient of ozone ranged from 0.167 to 0.658 and the correlation coefficient was high as the distance was far and vice versa.

• 대한전자공학회논문지TC
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• 제48권2호
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• pp.29-35
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• 2011

PHR(Personal Health Record)은 평생건강관리를 지원하기 위해 소비자에게 자신의 진료정보를 언제 어디서나 열람할 수 있고 건강정보를 직접 입력 및 관리할 수 있도록 도와주는 서비스로 정의할 수 있다. 이러한 PHR 서비스를 효율적으로 제공하기 위해서는 PHR 시스템과 보건의료 관련 정보시스템이 통합 및 연계될 수 있어야 한다. 하지만 현재의 보건의료분야 정보시스템은 늘어나는 보건의료 수요 충족을 위해 다양한 시스템을 구축 운영하고 있으며, 그에 따른 정보화예산은 지속적으로 증가 추세에 있지만, 현재의 시스템은 다양한 시스템 간의 상호 연관성이 있음에도 통합 및 연계가 이루어지지 않고 있다. 본 논문에서는 이와 같은 한계를 극복하기 위한 대안으로 웹 서비스 기반의 보건의료분야 통합정보시스템을 제안한다. 웹에서 서비스 통합을 추구하는 주요한 수단으로 서비스 지향 구조(Service Oriented Architecture : SOA)를 들 수 있다. 이는 기존에 구축되어 있는 시스템을 크게 변형하지 않으면서도 새로운 요구사항들을 추가할 수 있도록 허용함으로써 빠르게 변화하는 보건의료분야 환경에 최대한 신속히 적응 할 수 있도록 하는 매우 중요한 모델이다. 따라서 본 논문에서는 PHR 서비스를 위한 플랫폼으로써 SOA를 기반으로 하는 보건의료분야 통합정보시스템을 설계하고 이를 구현함으로써, 웹 서비스 기반이 PHR 서비스를 위한 새로운 통합정보시스템 구축의 적합한 모델임을 입증한다.

• 한국안전학회지
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• 제35권5호
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• pp.49-58
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• 2020

In domestic construction sites, when installing steel pipe scaffolding and system scaffolding, the guardrails are installed after the installation of the work platforms. This conventional guardrail system (CGS) is always exposed to the risk of falls because the safety railing is installed later. In order to prevent fall disasters during erecting and dismantling scaffolds, it is necessary to introduce the advanced guardrail system (AGS) which installs railings in advance of climbing onto a work platform. For the introduction of the AGS, the structural performance of the system scaffolding applying the CGS and the AGS was compared and evaluated. The structural analysis of the system scaffold (height: 31 m and width: 27.4 m) with AGS confirmed that structural safety was ensured because the maximum stress of each element of the system scaffolding satisfies the allowable stress of each element. As a result of performance comparison of CGS and AGS for each element, the combined stress ratio of vertical posts in AGS was 6.4% lower than that of CGS. In addition, in the case of ledger and transom, the combined stress ratios of AGS and CGS were almost the same. The compression test of the assembled system scaffolding (three-storied, 1 bay) showed that the AGS had better performance than the CGS by 9.7% (8.91 kN). The cross bracing exceeds the limit on slenderness ratio of codes for structural steel design. But the safety factor for the compressive load of the cross bracing was evaluated as meeting the design criteria by securing 3 or more. In actual experiments, it was confirmed that brace buckling did not occur even though the overall scaffold was buckled. Therefore, in the case of temporary structures, it was proposed to revise the standards for limiting on slenderness ratio of secondary or auxiliary elements to recommendations. This study can be used as basic data for the introduction of AGS for installing guardrails in advance at domestic construction sites.