• 대한조선학회논문집
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• 제56권5호
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• pp.383-388
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• 2019

It is essential to reduce the Infra-red signature for increasing ship's survivability in ship design stage. However the ship's IR signature is quite sensitive to the maritime and atmosphere. Therefore, it is very important to select the marine meteorological data to be applied to the signature analysis. In this study, we selected the three meteorological sample sets from the population of the Korea Meteorological Administration's marine environment data in 2017. These samples were selected through the two-dimensional stratified sampling method, taking into account the geopolitical threats of the Korean peninsula and the effective area of the buoy. These sample sets were applied to three naval ships classified by their tonnage, and then the IR signature analysis was performed to derive the Contrast Radiant Intensity (CRI) values. Based on the CRI values, the validity of each sample set was determined by comparing Cumulative Distribution Function (CDF), and Probability Density Function (PDF). Also, we checked the degree of scattering in each sample set and determined the efficiency of analysis time and cost according to marine meteorological sample sets to confirm the possibility of a probabilistic method. Through this process, we selected the standard for optimization of marine meteorological sample for ship IR signature analysis. Based on this optimization sample, by applying probabilistic method to the management of IR signature for naval ships, the robust design is possible.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.1463-1464
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• 2013

• 한국통신학회논문지
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• 제42권4호
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• pp.879-888
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• 2017

사물 인터넷의 보급으로 인해 스마트홈 서비스 기능을 제공하는 스마트 가전의 보급이 활발하게 이루어지고 있다. 이에 따라 스마트기기로 직접 제어할 수 있는 Wi-Fi 및 Bluetooth가 접목된 제품들이 선호되고 있다. 하지만 현재까지 개발된 가전제품은 IR(InfraRed) 기반의 제품이 많으며, 제품마다 호환되는 프로토콜이 다르다는 문제가 있다. 본 논문에서는 이러한 문제를 해결하기 위하여 스마트폰을 이용하여 스마트 가전 및 기존 가전제품을 제어하기 위한 시스템을 제안하고자 한다. 제안하는 시스템은 Wi-Fi 및 IR 게이트웨이로 스마트폰의 제어명령을 Wi-Fi를 통해 수신하고 이를 IR로 변환하여 기존 가전제품들을 제어하는 역할을 수행하도록 한다. 또한 특정 브랜드의 가전제품이나 특정 스마트폰에서만 지원 가능했던 리모컨기능을 제약 없이 사용가능 하도록 하고, 하나의 가전기기에 하나의 리모컨이 사용되는 한계점을 벗어나 모든 스마트폰을 이용하여 다양한 가전제품을 제어할 수 있도록 하고자 한다.

• 대한의용생체공학회:의공학회지
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• 제14권2호
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• pp.169-175
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• 1993

Recently, interest in infra-red(IR) telemetry has increased because of the entirely different propagation and reflection properties of IR light as compared to radiowaves. IR hardly penetrates most materials and is reflected from obstacles. An biotelemetry system using these characteristics of indirect transmitted IR lights was developed, in which 3 ECG's are multiplexed and modulated in PDM/PIM pulse sequence. This proto-type system enables us to realize the non-restraint measurement of biological signals. Compared with conventional radio telemetry, this technique has some merits such as no electromagnetic interference, no frequency allocation problem, no government control over transmission power.

• 한국연초학회지
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• 제20권2호
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• pp.198-204
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• 1998

This study was conducted to evaluate the effect of far IR radiation for the elimination of sidestream smoke components in a closed room. The measurements covered particle sizes of 13.8-542.5 nm, particle concentration, TSP, UVPM, FPM, solanesol, and the following gases and vapor components of smoke: carbon dioxide, carbon monoxide, nicotine, and 3-ethenyl-pyridine. Also, the changes of smoke odor strength by far IR radiation were tested by using the electronic nose system. There was no difference between control and far IR radiation in changes of the concentration of $CO_2$ and CO. The concentrations of TSP, UVPM, FPM, solanesol, nicotine, and 3-ethenylpyridine were reduced by far IR radiation. The growth and diminishing rate of RSP diameter was accelerated by far IR radiation compared with control. There was a little difference of smoke odor change with far IR radiation by electronic nose system analysis. Our results indicated that the use of far IR radiation had a little effect on changes of solid, vapor, and odor of smoke, but it had no effect on gaseous components.

• 한국정밀공학회지
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• 제29권8호
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• pp.853-862
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• 2012

The present study develops a method for directly measuring the temperature field in the primary deformation zone with a high spatial resolution during 2-D orthogonal machining. This is enabled by the use of a high-speed, charge-coupled device (CCD) based, infra-red (IR) imaging system which allows characteristics of the temperature field such as the location and magnitude of the highest temperature and temperature gradient in the primary deformation zone to be identified. Based on these data, the relation between the machining temperature and the cutting conditions is investigated.

• 대한원격탐사학회지
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• 제36권4호
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• pp.545-555
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• 2020

This paper focuses on automatic image registration between EO (Electro-Optical) and IR (InfraRed) satellite images with different spectral properties using block-based approach and simple preprocessing technique to enhance the performance of feature matching. If unpreprocessed EO and IR images from Kompsat-3A satellite were applied to local feature matching algorithms(Scale Invariant Feature Transform, Speed-Up Robust Feature, etc.), image registration algorithm generally failed because of few detected feature points or mismatched pairs despite of many detected feature points. In this paper, we proposed a new image registration method which improved the performance of feature matching with block-based registration process on 9-divided image and pre-processing technique based on adaptive histogram equalization. The proposed method showed better performance than without our proposed technique on visual inspection and I-RMSE. This study can be used for automatic image registration between various images acquired from different sensors.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.225-226
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• 2012

• 한국항공우주학회지
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• 제40권8호
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• pp.688-694
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• 2012

본 연구에서는 엔진 노즐 형상이 엔진 Plume의 적외선 신호 특성에 미치는 영향에 대해서 연구하였다. 이를 위해 적외선 신호 감소 효과를 가지는 큰 세장비의 엔진 노즐과 적외선 감소가 요구되지 않는 항공기에 적용되는 일반적인 원통형 형상의 노즐에 대한 형상설계를 수행하였다. 그리고 두 노즐에 대한 열유동해석을 수행하고 두 노즐의 유동장 특성을 비교하였다. 이후 열유동해석 결과를 이용하여 두 노즐에 대한 적외선 신호 해석을 수행하고 그 결과를 분석하였다.

• 천문학회보
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• 제36권1호
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• pp.82.2-82.2
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• 2011

Infra-Red Dark Clouds (IRDCs) seen silhouette against the bright Galactic background in mid-IR are a class of interstellar clouds that are dense and cold with very high column densities. While IRDCs are believed to be the precursors to massive stars and star clusters, individual IRDCs show diverse star forming activities within them. We report a remarkable example of such cloud, the IRDC at ${\Gamma}53.2^{\circ}$, and star formation activity in this cloud. The IRDC was previously identified in part as three separate, arcmin-size clouds in the catalogue of MSX IRDC candidates, but we found that the IRDC is associated with a long, filamentary CO cloud at 2 kpc from the Galactic Ring Survey data of $^{13}CO$ J = 1-0 emission, and that its total extent reaches ~ 30pc. The Spitzer MIPSGAL 24mm data show a number of reddened mid-IR sources distributed along the IRDC which are probably young stellar objects (YSOs), and the UWISH2 $H_2$ data (2.122mm) reveal ubiquitous out flows around them. These observations indicate that the IRDC is a site of active star formation with YSOs in various evolutionary stages. In order to investigate the nature of mid-IR sources, we have performed photometry of MIPSGAL data, and we present a catalogue of YSOs combining other available point source catalogues from optical to IR. We discuss the evolutionary stages and characteristics of YSOs from their IR colors and spectral energy distributions.