Earticle

The antioxidant power of polyphenols has made it possible to have cloth dyed green by affecting the oxidation-reduction reaction of indigo. In addition with concentrations of polyphenol, there has been a more powerful impact on green-dyeing and by performing several experiments, we were able to make some trend-lines about how much green color a dyed cloth has and demonstrated that the cloth’s color shows how much antioxidative activity an antioxidant has. We expect that we could get more accurate lines with more experiments. Using this method, a brand-new polyphenol sensor which is cheaper and safer than preexisting ones can be possibly invented.

Nowadays, wireless sensor network applications have been used in several important areas, such as healthcare, military, critical infrastructure , environmental monitoring, and manufacturing. However, due to the limitation of WSNs in terms of memory, energy, computation, and scalability, efficient management of the large number of WSNs data in these areas is an important issue to deal with. There is a need for a high-performance computing and massive storage infrastructure for real-time processing and storing of the data as well as analysis of the information. In this paper, we present a framework of sensor cloud computing and service to manage monitoring sensor data for the design build projects. With this sensor cloud framework, the entire project participants can efficiently share information to identify and solve issues in the design build phase.

This paper presents a active band-pass filter (BPF) for chopper frequency rejection. band pass filter consists of 2 Sallen-Key low-pass filter (LPF) and 3 feed forward high-pass filter (HPF). The LPF can adjust the cutoff freqeuncy through a 3 bit control, and the HPF can adjust the gain from 0 to 18 dB with 2 bit control. The BPF is designed and fabricated on CMOS 0.18 μm process.

최근 소형 전자기기의 대중화로 인해 이동성이 중요해지며 웨어러블 디바이스에 대한 수요가 증가하였 고, 스마트 패션 제품이 스포츠 및 헬스케어 분야에서 주목을 받고 있다. 그러나 높은 가격대와 제한적인 사용 목적은 스마트 패션 시장의 성장을 저해한다. 이러한 단점을 보완하기 위해 본 연구에서는 사용자 참 여형 디자인을 적용한 스마트 패션 액세서리를 제안하고자 한다. 사용자 참여형 디자인은 사용자가 제품 구매 및 사용 단계에서 직접 참여하는 디자인 방식으로, 제품에 대한 기능적 요구 충족 및 소비자의 개성 발현 과정으로 활용된다. 따라서, 본 연구의 목적은 일상적으로 착용이 가능한 스마트 패션 액세서리의 기 초 코딩 방법을 제안함으로써 사용자가 원하는 기능을 갖는 사용자 참여형 스마트 패션 액세서리 제작에 응용할 수 있도록 하는 것이다. 이를 위하여, 사용자 참여형 디자인과 스마트 패션의 정의 및 스마트 패션 에 사용자 참여형 디자인이 적용된 사례와 스마트 패션 액세서리의 주요 구성요소를 분석하였으며, 메이크 코드 프로그램과 서킷 플레이그라운드 익스프레스 보드를 활용하여 스마트 패션 액세서리의 디자인과 코 딩 과정에 능동적으로 참여할 수 있도록 하였다. 본 연구의 의의는 스마트 패션 제품의 디자인과 코딩 과 정을 통해 사용자의 개성을 표현할 수 있도록 하는 동시에 사용자의 요구에 부응하는 다양한 기능을 갖춘 스마트 패션 액세서리의 코딩 방법을 제안한 데 있다. 그러나 본 연구에서는 보드에 내장된 기본 구성요소 만을 활용하였기 때문에 디자인 변형이 제한적이다. 따라서 후속 연구에서는 다양한 응용 디자인 제작이 가능하도록 외장 센서 등 구성요소를 추가한 스마트 패션 액세서리 프로토타입을 제안하고자 한다. 또한 본 연구에서 설계한 기초 코딩을 바탕으로 제작한 제품의 내구성에 관한 후속 연구를 통해 일상생활에서 사용할 수 있는 대중적인 스마트 패션 제품을 개발하고자 한다.

As small electronic devices became popular, the demand for wearable devices increased and smart fashion products drew attention in the fields of sports and healthcare. However, their high price and limited purposes of use act as disadvantages, hindering the smart fashion market growth. To overcome these shortcomings, smart fashion accessories with user participatory design were proposed in this study. User participatory design is a type of design in which consumers directly involve in designing and using products to satisfy their needs and to express their individuality. Thus, this study aimed to propose a programming method of smart fashion accessories that could be applied with users’ desired functions. For this, the definition of user participatory design and smart fashion, and the case of smart fashion with user participatory design were studied. Next, the main components of smart fashion accessories were analyzed. Lastly, the basic programming method of two smart fashion accessories with user participatory design were proposed. The novelty of this study was to propose the programming method of smart fashion accessories with users’ desired functions. In this study, design variations are limited due to the use of basic components built in the board. As a follow-up study, a smart fashion accessory prototype with additional components such as an external sensor would be proposed to produce various applied designs. In addition, based on the basic coding designed in this study, the follow-up study would be conducted on the durability of the smart fashion products that can be used in daily life.

In this paper, a rotating-gate field-effect transistor has been developed to be used as a self-powered sensor. The developed device showed the drain current increased according to the rotation velocity of the gate motor and saturated under a sufficient drain voltage.

In horse management, the alarm system with sensors in the foaling period enables the breeder can appropriately prepare the time of the parturition. It is important to prevent losses by unpredictable parturition because there are several high risks such as dystocia and the death of foals and mares during foaling. However, unlike analysis in the alarm system that detects specific motions has been widely performed, analysis of classification following specific behavior patterns or number needs to be more organized. Thus, the objective of this study is to classify signs of the specific behaviors of the mares for the prediction of pre-foaling behaviors. Five Thoroughbred mares (9-20 yrs) were randomly selected for observation of the prefoaling behaviors. The behaviors were monitored for 90 min that was divided into three different periods as 1) from -90 to -60 min, 2) from -60 to -30 min, 3) from -30 min to the time for the discharge of the amniotic fluid, respectively. The behaviors were divided into two different categories as state and frequent behaviors and each specific behavioral pattern for classification was individually described. In the state behaviors, the number of mares in the standing of the foaling group (3.17 ± 0.18b) at period 3 was significantly higher than the control group (1.67 ± 0.46a). In contrast, the number of the mares in the eating of the foaling group (1.17 ± 0.34b) at period 3 was significantly lower than the control group (3.33 ± 0.46a). In the frequent behaviors, the weaving of the foaling group was significantly higher than the control group, and looking at the belly of the foaling group was significantly lower than the control group. In period 2, defecation, weaving, and lowering the head of the foaling group were significantly higher than the control group, respectively. In period 3, sitting down and standing up, pawing, weaving, and lowering the head in the foaling group were also significantly higher than the control group. In conclusion, the behavior is significantly different in foaling periods, and the prediction of foaling may be feasible by the detection of the pre-foaling behaviors in the mares.

한전의 저압전송전선로로 이용되고 있는 지중저압접속함은 지중선로의 분기나 접속을 목 으로 하고 있다. 지중저압접속함은 거리의 미관을 고려하는 효용성에 비하여 여름철 집중호우 나 도로의 침수에 의하여 감전사고가 발생하는 등 안전대책이 필요하다. 본 논문에서는 지중 저압접속함 내부에 온습도, CO2, 수위, 가속도, 진동 센서를 장착하고 센서 데이터를 지그비 모듈을 이용하여 지상으로 데이터를 전송한다. 지상과의 통신을 위한 안테나(볼티드 안테나) 를 제안하여 이를 통한 데이터 수신을 확인하였다. 전송된 데이터는 LF 모드 및 HEX모드에서 완벽한 수신 성공률이 확인되었으며, 볼티드 안테나는 난환경 사태에서 실험한 결과 지중상태 와 수중상태의 차이는 보이고 있으나, 지중저압접속함으로부터 10m 정도 떨어진 지상과의 통 신에는 충분히 수신감도라고 판단되었다. 수신된 데이터는 PC기반의 GUI를 통해 확인할 수 있었다.

The low-voltage connection box used as a low-voltage transmission line of KEPCO is intended to branch or connect to an underground line. In comparison with the utility considering the aesthetics of the distance, and safety measures are needed. In this paper, temperature and humidity, CO2, water level, acceleration, and vibration sensor are installed inside the underground low voltage handhole, and the sensor data is transmitted to the ground using the Zigbee module. Antenna (Bolted Antenna) for communication with the ground was proposed and the data reception through it was confirmed. In the LF mode and the HEX mode, the transmitted data was confirmed to be a perfect reception success rate. In the case of the bolted antenna, the difference between the ground state and the underwater state was observed as a result of the experiment in the environmental environment. However, It was judged that reception sensitivity was sufficient for communication. The received data could be confirmed through PC based GUI.

지문은 개인을 식별하는 요소로서 가장 광범위하게 적용되어지고 있다. 특히 일반적인 출입용 보안시스템에서 과학수사의 증거 수단에 이르기까지 그 활용도 는 타 생체인식 수단보다 효율적인 면에서 많은 장점을 가지고 있다. 현재까지 지문을 채취하기 위하여 채취인의 손가락이 직접 시스템에 접촉하여야 하는 방 법으로 수행되어 왔으나, 이로 인한 여러 가지 단점이 많이 대두되었다. 최근 선 도국에서는 이러한 단점을 극복하기 위하여 3차원(3D) 영상기술을 이용한 비접촉 식 지문인식시스템을 개발하여 상용화 단계에 이르렀다. 따라서 본 논문에서는 최근의 고정밀도 비접촉식 시스템의 기술동향을 면밀히 연구하고, 향후 국내 기 술의 개발환경 조성에 기반이 되는 제안을 제시함에 따라 효과적인 산업보안 전 문인 기여할 수 있을 것으로 예상되며, 나아가 국가 차원의 생체보안 기술수준 향상에 기여할 수 있을 것으로 예상된다.

Due to uniqueness and consistency over time, fingerprint identification is one of the most well-known and publicized biometrics in the world. But the current fingerprint recognition systems perform biometric acquisitions using touch-based devices, such as optical and solid state sensors. they have many problems in difficulty acquisitions with clear images. Touchless systems do not introduce deformations of the finger skin. They are more robust to dirt and environmental factors and do not present problems related to latent fingerprints. Recently, Addition to advancements in 3d-image processing capabilities and various sensor modules, fingerprint identification is detail information in acquisition data from enhancement sources. Through technology analysis of this paper to present intuitive standards for training specialized develop 3D systems, it is expected that it will be able to contribute to the researching of effective industrial security experts, furthermore at the national level industry. It is expected that it can contribute to the improvement of forensic security level.

Korea Superconducting Tokamak Advanced Research(KSTAR) device is composed of 30 superconducting magnets, magnet structure, vacuum vessel, cryostat, current feeder system, and etc. KSTAR device is operated in the cryogenic temperature and high magnetic field. We install about 800 sensors - temperature sensors, stain gages, displacement gages, hall sensors - to monitor the thermal, mechanical, electrical status of KSTAR during operation. As a tremendous numbers of sensors should be installed for monitoring the KSTAR device, the method of effective installation was developed. The sensor test was successfully carried out to check its reliability and its reproduction in the cryogenic temperature. The sensor signal is processed by PXI-based DAQ system and communicated with central control system via machine network and is shown by Operator Interface(OPI) display in the main control room. In order to safely operate the device, any violations of mechanical & superconductive characteristic of the device components were informed to its operation system & operator. If the monitored values exceed the pre-set values, the protective action should be taken against the possible damage. In this paper, the system composition, operation criteria, operation result were presented.

기계경비시스템은 대부분 전자·정보·통신 기기로 구성되어 있기 때문에 정보통신환경의 변화는 기계경비시스템의 기술, 운영체계, 운영방법 등에 영향을 미치게 된다. 본 연구는 기계경비시스템의 기술개발 동향 및 실태를 분석하고 기술개발 전망을 제시하는데 있다. 본 연구는 문헌연구와 기계경비시스템을 사용하는 수요자와 공급자와의 면담을 통한 분석과, 기술개발업자와 시스템 설치 기술자를 대상으로 한 설문조사를 통해 분석결과에 대한 검증을 실시하였다. 국제적으로 경쟁력이 있는 DVR 기술은 본래의 기능인 영상녹화 기능을 위주로 Motion Detection 기능과 상황변화 인식 기능, 목표물 추적 기능 등과 같은 다양한 기능을 수행할 수 있는 하이브리드 DVR 기술개발 쪽으로 진행될 것이며, 상황변화를 인식할 수 있는 기술은 현장에 설치된 많은 카메라를 소수의 인원이 효과적으로 감시할 수 있게 하여 기존의 CCTV시스템의 기능을 보다 향상시킬 수 있을 것이다. 그리고 영상전송기능을 수행하는 인터넷 서버 기술과 영상인식 소프트웨어가 카메라에 내장된 ‘Embedded IP카메라’ 기술개발은 CCTV시스템의 구성체계를 보다 간소화 시킬 수 있을 것이다.생체인식 중 지문인식기술과 얼굴인식기술은 국제적인 경쟁력을 가지고 기술개발이 진행되지만 얼굴인식기술은 인식기술에 있어서는 선진국과 비슷한 수준인 것으로 평가되고 있으나 인식거리를 확보하는 기술과 감시 기능, 3D인식 기술부분에 있어 다소 신뢰성이 떨어져 이를 보완하기 위한 지속적인 개발이 이루어질 것이다. RFID의 무선인식과 추적기능은 사람 또는 차량의 출입통제나 물품의 반입․반출의 감시․통제 등을 위해 유용하게 적용될 것으로 평가되고 있어 RFID의 하드웨어와 소프트웨어 기술개발이 활발하게 진행될 것으로 전망되지만 시장여건과 새로운 제품 도입을 꺼리고 수입 의존도가 높은 현상을 개선하기 위하여 개발된 제품을 사용할 수 있는 여건 조성 등 기술개발을 촉진하기 위한 적극적인 지원이 필요한 것으로 분석된다.행동패턴을 인식하여 침입상황을 감지하는 센서기술은 기존의 오작동이 많은 공간감지 센서를 대신하여 경보신호의 신뢰도를 향상시켜 자신있는 현장대응을 가능하게 해줄 수 있는 기술로 적극적으로 개발이 이루어질 것으로 전망된다. 행동패턴인식기술과 영상변화를 탐지하고 분석하는 영상인식기술은 유사한 기술로 서로 연계될 수 있으며, 경보신호전송 기술, 영상추적기술, RFID의 무선인식 및 추적 기술, 그리고 이를 관리하기 위한 미들웨어 기술을 통합하여 이상상황에 보다 효과적으로 대응할 수 있는 통합관제시스템을 구축할 수 있을 것이다.

Electronic security system is composed mainly of electronic-information- communication device, so system technology, configuration and management of the electronic security system could be affected by the change of information- communication environment. This study is to propose the future prospect on the development of technique for electronic security system through the analysis of the trend and the actual condition on the development of technique. This study is based on literature study and interview with user and provider of electronic security system, also survey was carried out by system provider and members of security integration company to come up with more practical result.Hybrid DVR technology that has multi-function such as motion detection, target tracking and image identification is expected to be developed. And 'Embedded IP camera' technology that internet server and image identification software are built in. Those technologies could change the configuration and management of CCTV system.Fingerprint identification technology and face identification technology are continually developed to get more reliability, but continual development of surveillance and three-dimension identification technology for more efficient face identification system is needed.As radio identification and tracking function of RFID is appreciated as very useful for access control system, hardware and software of RFID technology is expected to be developed, but government’s support for market revitalization is necessary. Behavior pattern identification sensor technology is expected to be developed and could replace passive infrared sensor that cause system error, giving security guard firm confidence for response. The principle of behavior pattern identification is similar to image identification, so those two technology could be integrated with tracking technology and radio identification technology of RFID for total monitoring system. For more efficient electronic security system, middle-ware's role is very important to integrate the technology of electronic security system, this could make possible of installing the integrated security system.

This report examines the variation on structural properties of SnO2 thin films .TEM studies shows some of the interfaces to be atomically faceted. Secondary X-ray photoelectron Spectroscopy Analysis(XPS) depth profiles show that films have a uniform composition along the depth.

In this paper, a network-independent distributed relay sensor (RS) activating method is proposed for energy-efficient cooperative communications using RSs. To achieve this, we introduce a novel metric termed the signal contribution-to-noise contribution ratio and design the required instantaneous received signal strength at RS for each RS to independently determine the activation. Therefore, the proposed RS activation (i.e., adaptive cooperation) is readily enabled without significant signaling overhead in the networks. The numerical results indicated that the proposed RS activation strategy can improve the received signal-to-noise ratio at a destination sensor with fewer active RSs, extending the lifetime of the sensor network.