• 한국전자통신학회논문지
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• 제13권2호
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• pp.369-376
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• 2018

본 논문은 안드로이드 기반으로 구현된 실시간 원격 모니터링 시스템을 제안한다. 원격 모니터링 기술은 모니터링에 필요한 비용의 절감과 비정상 상태의 빠른 발견에 이점이 있다. 제안된 모니터링 시스템은 민감한 정보를 보호하기 위해 RSA(Rivest Shamir Adleman) 알고리즘을 이용하는 보안 통신을 사용한다. 가스터빈의 이상 상황이 발생하였을 때, 원격 모니터링 시스템은 사용자의 주의를 끌기 위해 푸시 메시지를 이용한 경고를 한다. 제안된 시스템은 가상 데이터 발생기를 포함하는 실험 환경에서의 실험으로 검증되었다.

• KSBB Journal
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• 제22권6호
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• pp.401-408
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• 2007

전자코는 비특정센서를 이용하여 향기성분을 검출하는 분석 장치로 칼럼의 교체나 별도의 전처리과정 없이 사람의 코와 마찬가지로 패턴을 인식하여 신속하게 향기를 분석하거나 이취여부를 판별해 준다. 다변량 통계에 의한 차별성을 토대로 향기성분의 특성간의 차이를 주로 판별할 수도 있고 인공신경망을 통하여 반복된 학습 과정을 통해 미지의 시료의 향기성분과 비교하여 판별할 수도 있다. 전자코는 된장, 치즈, 포도주 등의 발효공정 과정에서 발효 정도를 예측할 수 있으며 또 다른 미생물의 오염 여부를 판단할 수가 있다. 식품산업에서 많이 활용되어 왔던 전자코 시스템의 응용은 바이오테크놀로지의 다양한 분야에도 보다 폭넓게 활용되어지기를 기대하여 본다.

• 한국직업건강간호학회지
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• 제30권4호
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• pp.145-155
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• 2021

Purpose: The purpose of this study was to examine the effects of customer violence experiences, protection systems, and monitoring systems on the subjective health status of salespersons and electronic machine repairers. Methods: A total of 934 persons were sampled nationwide, including 582 salespersons and 352 electronic machine repairers, from March 2~30, 2020 and asked to fill out a self-reported questionnaire. Results: The findings show that electronic machine repairers were more exposed to customer violence and had a weaker protection system than salespersons. They also experienced severe control from management through a monitoring system. The regression analysis revealed that verbal violence had a negative impact on the subjective health status of electronic machine repairers (p=.021). A worker protection system had significant effects on the improved subjective health status of salespersons (p=.009). Depression and fatigue had negative impacts on the subjective health status of both salespersons (depression: p<.001, fatigue: p<.001) and electronic machine repairers (depression: p<.001, fatigue: p=.002). Conclusion: These findings put a greater emphasis on the need for worker protection systems to prevent workplace violence and a health promotion program to manage depression and fatigue in workplaces.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2212-2215
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• 2001

Nowadays, environmental protection is increasingly concerned more than ever before. Therefore, it is prerequisite both to monitor some data and control them on-line for reducing the environmental pollution. In this paper, internet-based 3-dimensional monitoring system which utilizes PCS phones for wireless data communication with server computer is presented and its feasibility is tested by physical installation.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2008년도 제39차 동계학술발표논문집 16권2호
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• pp.97-100
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• 2009

홈네트워크 환경에서 정보가전기기를 제어하는데 PLC(전력선통신)나 IR컬트롤러가 사용된다. PLC의 경우 가전기기동작이 명확하지만 IR컨트롤러 같은 경우에는 방향이나 여러 조건에 따라 가전기기동작이 불분명하여 사용자의 명령대로 수행되지 못하는 경우가 발생한다. 본 논문에서는 이러한 상황을 해결하기 위해 가전기가의 상태를 모니터링하여 사용자에게 알려주는 방법을 제안하였다. 동작 상태와 대기 상태의 전류량이 다른점을 이용하여 동작 여부를 판별한다. 제안된 방법을 사용하면 IR 컨트롤러로 동작하는 가전기기의 상태 신뢰성 을 높일 수 있다.

• 전기학회논문지
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• 제65권9호
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• pp.1493-1496
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• 2016

This paper proposes a system for reducing the standby power consumption in using the consumer electronic devices such as a television, a home theater, a set-top box, or a DVD player. The system is consisted of a flyback converter, monitoring circuits, a relay and a micro-processor. The proposed system can reduce the standby power consumption by disconnecting the AC input and the consumer devices can be turned on with a remote control. The proposed standby power system consumes the low power to receive the infrared signal from the remote controller. Furthermore, a electronic double layer capacitor is used to store the energy with high efficiency. The proposed power system can operate the 플라이백 converter to charge the electronic double layer capacitor and connect the AC input to the consumer electronic devices. The proposed power circuit can reduce the standby power consumption in AV devices without increasing the cost. The prototype is implemented to verify the system with the commercialized products.

• E2M - 전기 전자와 첨단 소재
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• 제20권2호
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• pp.3-11
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• 2007

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제42회 동계 정기 학술대회 초록집
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• pp.523-523
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• 2012

As the wafer geometric requirements continuously complicated and minutes in tens of nanometers, the expectation of real-time add-on sensors for in-situ plasma process monitoring is rapidly increasing. Various industry applications, utilizing plasma impedance monitor (PIM) and optical emission spectroscopy (OES), on etch end point detection, etch chemistry investigation, health monitoring, fault detection and classification, and advanced process control are good examples. However, process monitoring in semiconductor manufacturing industry requires non-invasiveness. The hypothesis behind the optical monitoring of plasma induced ion current is for the monitoring of plasma induced charging damage in non-invasive optical way. In plasma dielectric via etching, the bombardment of reactive ions on exposed conductor patterns may induce electrical current. Induced electrical charge can further flow down to device level, and accumulated charges in the consecutive plasma processes during back-end metallization can create plasma induced charging damage to shift the threshold voltage of device. As a preliminary research for the hypothesis, we performed two phases experiment to measure the plasma induced current in etch environmental condition. We fabricated electrical test circuits to convert induced current to flickering frequency of LED output, and the flickering frequency was measured by high speed optical plasma monitoring system (OPMS) in 10 kHz. Current-frequency calibration was done in offline by applying stepwise current increase while LED flickering was measured. Once the performance of the test circuits was evaluated, a metal pad for collecting ion bombardment during plasma etch condition was placed inside etch chamber, and the LED output frequency was measured in real-time. It was successful to acquire high speed optical emission data acquisition in 10 kHz. Offline measurement with the test circuitry was satisfactory, and we are continuously investigating the potential of real-time in-situ plasma induce current measurement via OPMS.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1993년도 추계학술대회
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• pp.40-43
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• 1993

Electronic fetal monitoring system is an easier ar d usual method in various prenatal and labor period fetal surveilence methods currently in use. But there haven't been enough cases of using the central monitoring system despite the fact that the bedside fetal monitoring system have already been widely in use in Korea as an essential medical equipment item. We have developed more efficient central fetal monitoring system based on the personal computer with the visual maternal monotoring device using infrared camera which processes the signals from existing bedside fetal monitoring systems such as H/P's 8040 series. And we have performed the clinical application on 41 pregnant women and the results were satisfactory. In conclusion, more efficient and familial fetal monitoring is possible with our PC based central fetal monitoring system which provides the medical personnel with the view of a selected pregnant woman on the same screen where the electronic waveforms and data are displayed.

• 센서학회지
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• 제12권1호
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• pp.24-33
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• 2003

This research is about a comfort sensing system for human environmental monitoring using a one-bodied humidity and temperature sensor and an air flow sensor. The thermal comfort that a human being feels in indoor environment has been known to be influenced mostly by six parameters, i.e. air temperature, radiation, air flow, humidity, activity level and clothing thermal resistance. Considering an environmental monitoring, we have designed and fabricated a one-bodied humidity and temperature sensor and an air flow sensor that detect air relative humidity, temperature and air flow in human environment using surface micromachining technologies. Micro-controller calculates a PMV (predicted mean vote) and CSV (comfort sensing vote) with sensing signals and display a PMV on LCD (liquid crystal display) for human comfort on indoor climate. Our work has demonstrated that a comfort sensing system can provide an effective means of measuring and monitoring the indoor comfort sensing index of a human being. Experimental results with simulated environment clearly suggest that our comfort sensing system can be used in many applications such as air conditioning system, feedback controlling in automobile, home and hospital etc..