• Journal of the Institute of Convergence Signal Processing
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• v.19 no.1
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• pp.28-34
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• 2018

This paper is composed of a passenger management system using a temperature sensing module, a PIR sensor module for detecting movement inside a room, and a smart breath sensing module for determining a sleeping state. An embedded sensor module and a communication system integrated the sensing part and the algorithm driving part. As the aging society is accelerating and becoming more upgraded, the social cost of Silver Care increases, and in order to protect privacy, it is necessary to reduce costs by developing efficient smart silver care devices. The proposed non - image human body detection IOT sensor system is implemented by hardware and software and has superior performance compared with conventional image monitoring method.

• Applied Chemistry for Engineering
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• v.32 no.6
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• pp.647-652
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• 2021

In this study, Saussurea Lappa roots were extracted using ethanol and n-hexane, and also the effects on proliferation of human hair dermal papilla cells and fibroblast and related signaling pathway were evaluated. 3-[4, 5-dimethylthiazol-2-yl]-2, 5 diphenyl tetrazolium bromide (MTT) assay was conducted for cell proliferation effect of Saussurea Lappa root extract, and extracellular signal-related kinase (ERK), serine/threonine protein kinase (Akt), wingless-related integration site (Wnt)/𝛽-catenin signaling pathway, and 5𝛼-reductase expression through western blot analysis were measured. Saussurea Lappa root extract significantly increased human hair dermal papilla cells and propagation of fibroblast, promoted phosphorylation of ERK and Akt that get involved in cell proliferation. Additionally, Saussurea Lappa root extract significantly decreased promotion of Akt phosphorylation and cell proliferation by MEK/ERK inhibitor PD98059 and PI3K/Akt inhibitor LY294002. Also, Saussurea Lappa root extract induced intranuclear 𝛽-catenin accumulation by promoting phosphorylation of 𝛽-catenin (Ser552, 675) through phosphorylation of GSK-3𝛽 (Ser9), and suppressed activation of 5𝛼-reductase type I and II. Overall, Saussurea Lappa root induces cell proliferation through vitalization of ERK and Akt route of human hair dermal papilla cells and fibroblast and apoptosis defense mechanism, and can be helpful in hair loss prevention and hair growth by vitalizing the 𝛽-catenin signaling pathway and inhibiting activation of 5𝛼-reductase, which can be used as a potential hair care products.

• The Journal of the Korea institute of electronic communication sciences
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• v.6 no.6
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• pp.981-986
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• 2011

In this paper, the module for measuring SpO2 and PPG(Photo Plethysmo Graphy) signal of human body and the module for wireless communication of these bio-signals to PC were developed. The program was developed to display transmitted SpO2 and PPG signal by various type data and graph without information loss during a emergency transfer. This system can be utilized as appropriate for remote medical care and a new market is expected, to be created according to revision of medical law.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2702-2703
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• 2002

본 연구에서는 종래의 심박출량 및 일회 심박동량 측정장치를 휴대용 시스템으로 구현하기 위한 회로 설계방법을 연구하였다. 휴대용 시스템의 설계를 위한 아날로그 부분은 인체 안전을 위한 아이솔레이션 증폭기, 변복조기, 0.1Hz 고역통과 필터 및 잡음제거 회로로 구성되며, 연속 심박출량 모니터링 및 연산을 위한 디지탈 부분은 TMS32030C를 이용한 회로로 구성이 된다. 또한 기존의 방법에서의 문제점을 개선하기 위해 연속 심박출량 연산을 위한 새로운 알고리듬을 제안하였다. 제안된 방법은 앙상블 평균시에 기존의 심전도 R피이크 점을 기준으로 하지 않고, 임피던스 신호의 dZ/dt 최대점을 이용하는 방법을 적용하였다. 제안한 심박출량 신호처리 알고리듬을 이용하여 측정된 임피던스 신호를 분석한 결과 최대 25.5 %까지 개선됨을 확인하였다.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.26 no.1
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• pp.1-16
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• 2000

Keratinocyte 는 피부 표피충의 대부분을 차지하고 있으며, 세포간 신호전달물질 cytokine을 생성분비함으로써 주위의 다른 피부세포의 활성 및 분화능력을 조절한다. 특히 melanocyte 한 세포는 keratinocyte 30 여 세포와 직접적으로 접촉하고 있으며 활발한 신호 전달을 통하여 피부생리의 동적평형 유지에 기여하고 있다. 본 연구에서는 실제 피부에서와 유사한 조건에서 keratinocyte 의 세포의 배출 신호물질인 cytokine 의 변화를 유도하는 물질이 melanocyte 의 피부색소형성과정에 기여하는 바를 평가하기위하여 keratinocyte-melanocyte 의 공동배양계 실험조건과 아울러, UVB 조사에 의해 keratinocyte 로부터 유리되는 물질이 melanocyte를 자극하여 melanin 생합성 유도를 촉진하는 기본 실험 System 을 확립하였고, 가능성있는 친연추출물 원료, 즉, 신이, 강황등의 melanin 생합성 억제능을 본 공동배양계에서 1차 평가한 후 소규모 임상실험에서 미백효능을 최종 평가하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.799-801
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• 2013

최근 들어 봄과 가을이 짧아지고 여름이 길어지면서 매운 음식을 즐겨 먹는 현대인들이 증가하고 있다. 매운 음식은 더위 속에서 건강을 지키기 위해 만들어진 과학적인 음식으로 기후가 덥고 습한 환경에서 매운 음식으로 땀을 빼야 몸이 가뿐해진다고 알려져 있다. 따라서 본 논문에서는 매운 음식을 섭취함으로써 인체 기관에 미치는 기능적 변화를 음성신호 분석학적 방법의 적용으로 연구를 수행하였다. 이를 위해 20대 남성 15명을 대상으로 매운 음식을 섭취하기 전과 후의 음성을 수집하고 음성분석 요소를 적용한 실험을 수행하여 상호간의 비교, 분석을 통해 매운 음식과 음성신호 변화와의 상관성 분석을 수행하였다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.23 no.1
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• pp.108-114
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• 2012

We propose a dispersive finite-difference time domain(FDTD) algorithm suitable for the electromagnetic analysis of the human body. In this work, the dispersion relation of the human body is modeled by a quadratic complex rational function(QCRF), which leads to an accurate and efficient FDTD algorithm. Coefficients(involved in QCRF) for various human tissues are extracted by applying a weighted least square method(WLSM), referred to as the complex-curve fitting technique. We also presents the FDTD formulation for the QCRF-based dispersive model in detail. The QCRFbased dispersive model is significantly accurate and its FDTD implementation is more efficient than the counterpart of the Cole-Cole model. Numerical examples are used to show the validity of the proposed FDTD algorithm.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.4
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• pp.1266-1271
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• 2010

In this paper, we implemented a heartbeat-signal monitoring system that can measure and check the heartbeat of a human body in any time and anywhere. The implemented prototype is composed of heartbeat measurement terminal, gateway, and server that collect and process data. The terminal compose sensor network using ZigBee protocol. And server acquire heartbeat signal through differentiating collected data two times, and store above data to database and manage it. We can understand the status of examinee's heart without restriction and self-awareness. Through experiment, we confirmed the possibility of ubiquitous healthcare system based on sonsor network using the ZigBee.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.5
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• pp.145-150
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• 2011

This study was developed the posture balance system of multi-parameter for moving body after and before exercising. Body transition meaned a head moving and upper body moving. This system has catched a signal for physical condition of body data such as a data acquisition system, data signal processing and feedback system. There were checked a parameter that measured vision, vestibular, somatosensory, CNS. This system was evaluated a data through the stability. The posture balance system can be used to support assessment for body moving in exercising situation. It was expected to monitor a physical parameter for health management system.

• Journal of Digital Convergence
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• v.10 no.10
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• pp.313-318
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• 2012

In this study, we propose a low-noise transceiver for 10GHz motion sensor. The transceiver presented here has a circuit(Hittite HMC908LC5) that is composed of a two way-$0^{\circ}$ power splitter(the 1:2 block) and a $90^{\circ}$ Hybrid. The noise reduction circuit utilizes an LNA followed by an image reject mixer which is driven by an LO buffer amplifier. A modeling and analysis have been pursued using CST MWS. A prototype sensor was manufactured to measure the performance and experimental results show that the proposed sensor is good enough to use for a accurate motion sensor.