• International Journal of Oral Biology
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• 제42권1호
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• pp.9-15
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• 2017

Microglia have multiple functions in regulating homeostasis of the central nervous system. Microglia cells have been implicated as active contributors to neuron damage in neurodegenerative disorders. In this study, medicinal plant extracts (MPEs) were used to evaluate the cell-death induction effect in microglia BV-2 cells. Among 35 MPEs tested in this study, 4 MPEs showed less than a 30% cell survival after 24 hours of incubation. These were Foeniculi Fructus, Forsythiae Fructus, Zingiberis Rhizoma and Hedera Rhombea. The concentration showed that 50% cell death ($IC_{50}$) occurred with 33, 83, 67 Ed highlight: Please confirm wording, and $81{\mu}/ml$, respectively. For further study, we chose Zingiberis Rhizoma (ZR) which showed a reasonably low $IC_{50}$ value and an induction of cell death in a relatively narrow range. Western blot analysis showed that ZR-treated cells showed activation of caspase-3 and cleavage of PARP Ed highlight: When an acronym is first presented it needs to be spelled out in both dose- and time-dependent manners. However, the level of Bcl-2 and Bax were not changed by ZR-treatment in BV-2 cells. These results suggest that ZR-induced apoptosis in BV-2 cells occured through caspase-3 activation. The results also suggested that ZR may be useful in developing treatments for neurodegenerative diseases.

• 한국재난정보학회 논문집
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• 제15권3호
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• pp.380-390
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• 2019

연구목적: 최근 전기레인지의 사용증가와 더불어 화재도 증가하고 있다. 전기레인지 중 대표적인 인덕션과 하이라이트 방식에 대해 구조 및 작동방법을 알아보고 화재위험성을 살펴보고자 하였다. 연구방법: 두 방식에 대하여 연소실험, 전열실험, 발화실험 등을 실시하였다. 연구결과: 하이라이트 전기레인지는 키친타월이 2분 후 연소되었고, 조리를 마친 후 잔열이 식는데 약 25분이 소요되며, 니크롬선의 붉은 기운이 3~4분 만에 사라지고 불꽃이 보이지 않았다. 결론: 실험 결과 하이라이트 방식은 화상 및 화재 위험성이 존재하며, 특히 상판에 균열이 있을 경우 화재 및 폭발의 위험성이 있음을 알 수 있었다.

• Structural Monitoring and Maintenance
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• 제6권2호
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• pp.161-171
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• 2019

There have been a few checking frameworks intended to ensure and improve the nature of their regular habitat. The greater part of these frameworks are constrained in their capacities. In this paper, the insightful checking framework intended for debacle help and administrations has been exhibited. The ideal administrations, necessities and coming about plan proposition have been indicated. This has prompted a framework that depends fundamentally on ecological examination so as to offer consideration and security administrations to give the self-governance of indigenous habitats. In this sense, ecological acknowledgment is considered, where, in light of past work, novel commitments have been made to help include based and PC vision situations. This epic PC vision procedure utilized as notice framework for avalanche identification depends on changes in the normal landscape. The multi-criteria basic leadership strategy is used to incorporate slope data and the level of variety of the highlights. The reproduction consequences of highlight point discovery are shown in highlight guide coordinating toward discover steady and coordinating component focuses and effectively identified utilizing these two systems, by examining the variety in the distinguished highlights and the element coordinating.

• Nuclear Engineering and Technology
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• 제53권11호
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• pp.3505-3516
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• 2021

During nuclear facility decommissioning, workers are continuously exposed to high-level radiation. Hence, adequate path planning is critical to protect workers from unnecessary radiation exposure. This work discusses recent development in radioactive path planning and the algorithms recommended for the task. Specifically, we review the conventional methods for nuclear decommissioning path planning, analyze the techniques utilized in developing algorithms, and enumerate the decision factors that should be considered to optimize path planning algorithms. As a major contribution, we present the quantitative performance comparison of different algorithms utilized in solving path planning problems in nuclear decommissioning and highlight their merits and drawbacks. Also, we discuss techniques and critical consideration necessary for efficient application of robots and robotic path planning algorithms in nuclear facility decommissioning. Moreover, we analyze the influence of obstacles and the environmental/radioactive source dynamics on algorithms' efficiency. Finally, we recommend future research focus and highlight critical improvements required for the existing approaches towards a safer and cost-effective nuclear-decommissioning project.

• Medical Lasers
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• 제10권2호
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• pp.106-110
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• 2021

Background and Objectives As the popularity of tattooing has increased, the number of people regretting their tattoos, and therefore seeking tattoo removal services has also increased. This study aimed to highlight the reasons for tattoo regrets. We explore herein, the reasons for seeking tattoo removal at a specialized laser center in South America. Materials and Methods This is a retrospective study of over 757 surveys, including patients who sought tattoo removal services between August 2017 and February 2020. The surveys were conducted using questionnaires which were sent to the patients through email and WhatsApp messages. Results Sixty percent of the patients seeking tattoo erasing services were women (α=0.001), an average of 30 years, with a high educational level (46.6% of them were university or tertiary). Most of the tattoos (89%) had a professional origin, 60% were done with black color and 65% were in exposed areas. More than half of the patients (51%) gave dissatisfaction as the main reason for erasing their tattoos. More than half of patients (51.2%) regretted their tattoos between the same day of being tattooed and five years later. Conclusion In the present study, in South America, tattoo regrets were mostly common among educated (university or tertiary level) women in their 30s. The most preferred color for a tattoo was black. Exposed areas, especially the arms, were preferred more than the covered areas. Most of the participants regretted their tattoos within five years of being tattooed.

• Nuclear Engineering and Technology
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• 제54권4호
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• pp.1382-1393
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• 2022

This paper investigates the seismic behavior of an electrical cabinet considering the influence of equipment-anchor-interaction (EAI) that is generally not taken into consideration in a decoupled analysis. The hysteresis behavior of an anchor bolt in concrete was thereby considered to highlight this interaction effect. To this end, the experimental behavior of an anchor bolt under reversed cyclic loading was taken from the recently developed literature, and a numerical model for the anchor hysteresis was developed using the component approach. The hysteresis properties were then used to calibrate the multi-linear link element that is implemented as a boundary condition for the cabinet incorporating the EAI. To highlight this EAI further, the nonlinear time history analysis was performed for a cabinet considering the hysteresis behavior comparative to a fixed boundary condition. Additionally, the influence on the seismic fragility was evaluated for the operational and structural condition of the cabinet. The numerical analysis considering the anchor hysteresis manifests that the in-cabinet response spectra (ICRS) are significantly amplified with the corresponding reduction in the seismic capacity of 25% and 15% for an operational and structural safety condition under the selected protocols. Considering the fixed boundary condition over a realistic hysteresis behavior of the anchor bolt is more likely to overestimate the seismic capacity of the cabinet in a seismic qualification procedure.

• Archives of Plastic Surgery
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• 제50권4호
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• pp.443-444
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• 2023

Point-of-care photography and photo sharing optimize patient outcomes and facilitate remote consultation imperative for resident surgeons. This literature review and external pilot survey study highlight the risks associated with current practices concerning patient privacy and biometric security. In a survey of 30 plastic surgeon residents and attendings, we found that the majority took photos of patients with their iPhones and shared them with colleagues via Apple iMessage. These findings corroborate previous reports and highlight a lack of physician user acceptance of secure photo-sharing platforms. Finally, we frame a successful example from the literature in the context of a postulated framework for institutional change. Prioritizing the privacy and safety of patients requires a strategic approach that preserves the ease and frequency of use of current practices.

• 한국음향학회지
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• 제28권2호
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• pp.135-140
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• 2009

본 논문에서는 하이라이트 모델에 기반하여 능동소나의 표적신호를 합성하고, 합성된 신호를 이용하여 표적인식 실험을 수행하였다. 동일 표적이라도 표적의 자세각에 따라 다양한 형태의 파형을 갖는 신호가 합성되는데, 이에 대한 표적인식 결과를 알아보기 위해서 두 가지 방법으로 실험을 수행하였다. 하나는 고정된 여러 가지 자세각에 대한 표적신호에 대한 인식실험이고, 다른 하나는 임의의 자세각을 가지는 교신에 대만 인식 실험을 수행하였다. 인식실험을 위한 특징 인자로는 합성된 표적신호에 대해 시간영역에서 정합필터 및 포락선 검출을 통해 얻어지는 하이라이트 패턴을 사용하였으며, 패턴인식 기법으로는 다중클래스 SVM과 인공신경망을 사용하였다.

• 한국산학기술학회논문지
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• 제18권10호
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• pp.237-245
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• 2017

본 연구는 전통시장 상인의 건강상태와 건강관련 행태를 남녀별, 전통시장 종사기간별로 규명하고 일반인들과 비교하기 위한 횡단적 서술적 조사연구이다. 자료수집은 C시 D보건소에서 2015년 6월 1일부터 6월 20일까지 C시 N전통시장에서 종사하는 상인 307명에게 신체계측과 채혈을 한 후 설문조사를 실시하였고 수집된 자료는 SPSS WIN 21.0을 이용하여 분석하였다. 연구결과 전통시장 종사자들의 현재 흡연율은 34.2%, 3.5%, 11.1%(남, 여, 전체), 연간 음주율은 68.4%, 38.5%, 45.9%(남, 여, 전체), 스트레스를 많이 느낀 대상자와 우울감 경험률은 각각 23.7%, 28.5%, 27.4%(남, 여, 전체), 5.3%, 6.1%, 5.9%(남, 여, 전체)로 일반인에 비해서 낮았으나 중등도 신체활동 시행률과 걷기 실천율은 각각 32.9%, 19.9%, 23.1%(남, 여, 전체), 85.5%, 79.2%, 80.8%(남, 여, 전체)로 매우 높아 좋은 건강행위를 실천하고 있으며 정신건강도 상대적으로 양호한 상태를 유지하고 있는 것으로 파악되었다. 그러나 일반인에 비해서 고혈압, 당뇨병, 고콜레스테롤혈증, 대사증후군 유병률이 매우 높았고 전통시장 종사기간이 길수록 복부둘레, 저 HDL-콜레스테롤혈증(low HDL-cholesterol)과 고혈압, 대사증후군, 관절염의 유병률이 높은 것으로 나타났다. 따라서 이에 대한 구체적인 원인 규명과 함께 대상자들의 특성에 맞는 장기적인 생활개선 프로그램을 마련하고 지속적으로 적용해야 할 것으로 판단된다.

• 한국음향학회지
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• 제28권2호
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• pp.112-118
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• 2009

본 논문은 모바일 단말기, Digital Video Recorder (DVR) 등에 적용할 수 있는 뮤직비디오 브라우징 시스템을 위한 실시간 중요 구간 검출 알고리즘을 제안한다. 입력된 뮤직비디오는 음악 신호와 영상 신호로 분리되어 음악 신호에서는 에너지기반의 음악 특징값 최고점기반의 구조분석을 통해 음악의 후렴 구간을 포함하는 음악 하이라이트 구간을 검출하고, SVM AdaBoost 학습방식에서 생성된 모델을 이용해 음악신호를 분위기별로 자동 분류한다. 음악신호로부터 검출된 음악 하이라이트 구간과 영상신호로부터 검출된 가수, 주인공의 얼굴이 나오는 영상장면을 결합하여 최종적으로 중요구간이 결정된다. 제안된 방식을 통해 사용자는 모바일 단말기나 DVR에 저장되어 있는 다양한 뮤직비디오들을 분위기별로 선택한 후에 뮤직비디오의 30초 내외의 중요구간을 빠르게 브라우징하여 자신이 원하는 뮤직비디오를 선택할 수 있게 된다. 제안된 알고리즘의 성능을 측정하기 위해 200개의 뮤직비디오를 정해진 수동 뮤직비디오 구간과 비교하여 MOS 테스트를 실행한 결과 제안된 방식에서 검출된 중요 구간이 수동으로 정해진 구간보다 사용자 만족도 측면에서 우수한 결과를 나타내었다.