• Title/Summary/Keyword: infrared: imaging

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SH 2-128, AN H II AND STAR FORMING REGION IN AN UNLIKELY PLACE

  • BOHIGAS JOAQUIN;TAPIA MAURICIO
    • Journal of The Korean Astronomical Society
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    • v.37 no.4
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    • pp.285-288
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    • 2004
  • Near-infrared imaging photometry supplemented by optical spectroscopy and narrow-band imaging of the H II region Sh 2-128 and its environment are presented. This region contains a developed H II region and the neighboring compact H II region S 128N associated with a pair of water maser sources. Midway between these, the core of a CO cloud is located. The principal ionizing source of Sh 2-128 is an 07 star close to its center. A new spectroscopic distance of 9.4 kpc is derived, very similar to the kinematic distance to the nebula. This implies a galactocentric distance of 13.5 kpc and z = 550 pc. The region is optically thin with abundances close to those predicted by galactocentric gradients. The $JHK_s$ images show that S 128N contains several infrared point sources and nebular emission knots with large near-infrared excesses. One of the three red Ks knots coincides with the compact H II region. A few of the infrared-excess objects are close to known mid- and far-infrared emission peaks. Star counts in J and $K_s$ show the presence of a small cluster of B-type stars, mainly associated with S 128N. The $JHK_s$ photometric properties together with the characteristics of the other objects in the vicinity suggest that Sh 2-128 and S 128N constitute a single complex formed from the same molecular cloud, with ages ${\~}10^6$ and < $3 {\times} 10^5$ years respectively. No molecular hydrogen emission was detected at 2.12 ${\mu}m$. The origin of this remote star forming region is an open problem.

A Method for Evaluating the Temperature Coefficient of a Compound Semiconductor Energy Gap by Infrared Imaging Technique (적외선 영상기법에 의한 화합물 반도체 에너지갭의 온도계수 측정 방법)

  • Kang, Seong-Jun
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.38 no.5
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    • pp.338-346
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    • 2001
  • An infrared imaging method in which direct measurement of energy gap variations can be achieved by digital image processing is proposed. This method allows economic and easy evaluation of the temperature coefficients of a semiconductor energy gap. The key components of the method are a polychromator, a computer equipped with a frame grabber and a variable temperature cryostat. Tentative experimentation conducted on LEC grown semi-insulating GaAs has resulted in a fairly good agreement with the theoretical model. This proposed method could be applicable for most compound semiconductors.

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Multi-access for the Diagnosis of Missed Upper Lumbar Disc Herniation

  • Lee, Dong-Yeob;Kim, Hyung-Seok;Lee, Sang-Ho
    • Journal of Korean Neurosurgical Society
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    • v.38 no.2
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    • pp.144-146
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    • 2005
  • Herein, a case of missed upper lumbar disc herniation, diagnosed by thorough neurological examination, digital infrared thermographic imaging[DITI], and repeated magnetic resonance[MR] image study, is reported. A 36-year-old female presented with intractable leg pain on left anterior thigh. Although she underwent lumbar MR image at other hospital, she was misdiagnosed as acute sprain. Neurological examination suggested the possibility of upper lumbar disc herniation, which was confirmed by DITI, MRI, and selective root block. After operation, her leg pain was significantly improved. It should be considered that upper lumbar disc herniation might be misdiagnosed as an acute sprain, as in our case. A high index of suspicion based on thorough neurological examination is most important in such cases. Then, multi-access such as DITI, MR image, and selective block, base on thorough neurological examination, are warranted.

The Application of DITI for Compensatory Sweating (보상성 발한에 대한 컴퓨터 적외선 체열촬영(DITI)의 적용)

  • 조현민;함석진;김도형;이두연
    • Journal of Chest Surgery
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    • v.35 no.9
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    • pp.701-703
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    • 2002
  • The result of compensatory sweating after surgical treatment for essential hyperhidrosis had problems in objectivity and validity because it mainly depended on the subjective symptoms of patients. Therefore, we tried to evaluate more precisely and objectively, the distribution and degree of compensatory sweating by D.I.T.I.(Digital Infrared Thermographic Imaging) with subjective symptoms.

Near-IR Polarimetric Study of N159/160 Star-Forming Regions

  • Kim, Jaeyeong;Pak, Soojong;Jeong, Woong-Seob;Park, Won-Kee
    • The Bulletin of The Korean Astronomical Society
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    • v.39 no.2
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    • pp.79.1-79.1
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    • 2014
  • We present the result of near-infrared (near-IR) imaging polarimetry of star-forming regions in the Large Magellanic Cloud (LMC). We compiled near-IR photometric and polarimetric data of N159/160 regions. The photometric and polarimetric data were simultaneously obtained in J, H, and Ks bands using SIRPOL, an imaging polarimeter of the InfraRed Survey Facility (IRSF), in 2007 February. We measured Stokes parameters of point-like sources to derive their degree of polarization and polarization position angles. In this poster, we present polarization properties of these star-forming regions. We also discuss the polarization structure in these regions compared with mid-infrared dust emission structure from the Spitzer SAGE survey.

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A Study on IIRSS(Imaging Infrared Simulation System) (적외선 영상 시뮬레이션 시스템 연구)

  • Kwak, Byung-Chul;Kim, Min-Hee;Yang, Kyeong-Rok;Kim, Yeong-Ju
    • Proceedings of the KIEE Conference
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    • 2004.07d
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    • pp.2603-2605
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    • 2004
  • 적외선 영상 시뮬레이션 시스템(IIRSS : Imaging Infrared Simulation System)은 적외선 영상 센서를 탑재한 유도무기체계의 종말 호밍 단계에서의 체계 유도조종 성능 및 기능을 시험평가하기 위한 목적으로 연구 개발되었다. 적외선 영상 시뮬레이션 시스템은 체계성능을 단계적이고 종합적인 시험평가를 위하여 표적 주위 환경에 대하여 사실적이고, 동적인 실시간 시뮬레이션 환경이 제공되어야한다. 시뮬레이터 개발에 있어서 주요 관련 기술은 지형, 지물에 대한 3차원 모델링, 대기투과효과 모델링 및 합성된 적외선 영상의 실시간 렌더링 기술 등이다. 본 논문에서는 적외선 센서 시뮬레이션의 방법으로써 HILS(Hardware-in-The-Loop Simulation)를 위한 시뮬레이터 구성, 적외선 영상 생성을 위한 도구와 절차 및 시뮬레이션 방안에 대하여 기술한다.

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A Study on the TMBE Algorithm with the Target Size Information (표적 크기 정보를 사용한 TMBE 알고리즘 연구)

  • Jung, Yun Sik;Kim, Jin Hwan
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.9
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    • pp.836-842
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    • 2015
  • In this paper, the target size and model based target size estimator (TMBE) algorithm is presented for iimaging infrared (IIR) seeker. At the imaging seeker, target size information is important factor for accurate tracking. The model based target size estimator filter (MBEF) algorithm was proposed to estimate target size at imaging infrared seeker. But, the model based target size estimator filter algorithm need to know relative distance from the target. In order to overcome the problem, we propose target size and model based target size estimator filter (TMBEF) algorithm which based on the target size. The performance of proposed algorithm is tested at target intercept scenario. The experiment results show that the proposed algorithm has the accurate target size estimating performance.

Soundness Evaluation of 120W LED Lighting using Passive Infrared Thermal Imaging Method (수동적 적외선 열화상 기법을 적용한 120W급 LED조명등 건전성 평가)

  • Jung, Yoon-Soo;Gao, Jia-Chen;Kim, Jae-Yeol
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.16 no.4
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    • pp.140-146
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    • 2017
  • As energy conservation and environmental issues are emerging as a hot topic around the world, consumers are demanding high-efficiency, eco-friendly products. In this study, the author proposed 120W LED lighting system that replace metal halide lamp (MHL) which is currently used in the industry. Furthermore, it would be possible to provide a perfect opportunity for Korea to rise as a global leader in the LED lighting industry through soundness evaluation of the LED lighting system that is applied.

Clinical Observation on 1 Case of Both Leg Paralysis Patient Diagnosed Wei Symptom (위증(療證)으로 진단한 하지마비 환자의 치험 1례)

  • Wei, Tung-Sheun
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.20 no.3
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    • pp.748-752
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    • 2006
  • Wei symptom(?證) is symptom that reveals muscle relaxation without contraction and muscle relaxation occurs in the lower or upper limb, in severe case, leads to death. This is the clinical report about the Wei symptom(?證)-patient doubt as Transverse Myelitis and Conversion Disorder. The patient was treated by acupuncture, moxibustion, herb medication(十全大補湯), electriccal stimulation theraphy, Bee Venom acupuncture, and had significant improvement in Wei symptom(?證). these results suggest the surface temperature differ remarkably from before being treated. The temperature is measured by using Digital Infrared Thermal Imaging(DITI). The results suggest that oriental medicare is an effective treatment for Wei symptom. We expected that therapeutic value of treatment of both leg Paralysis in the oriental medicine will be higher if more clinical studies and researches are accomplished.

A clinical report of thermographic change after Korean Medicine Treatment on post-hysterectomy syndrome patients (자궁적출술 후 증후군의 한방치료 전후 체온분포 변화에 관한 임상보고)

  • Kim, Jihee;Lee, Gi-Seung;Kim, Jun-Cheol
    • Journal of Korean Medical Ki-Gong Academy
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    • v.14 no.1
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    • pp.52-62
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    • 2014
  • Objective : The aim of this study is to analyze the effectiveness of Korean Medicine treatment on post-hysterectomy syndrome patients by thermographic change during treatment. Methods : 5 female patients who had a hysterectomy within a year were treated with Korean Medicine concluding acupuncture, herbal medicine, cupping therapy, herbal bath. We evaluated the thermographic differences by checking Digital Infrared Thermal Imaging(D.I.T.I.) at CV17(膻中), CV4(關元), ST3(巨髎), BL15(心兪), and BL23(腎兪). Results : In consequence of Korean Medicine Treatment for 3 weeks, thermographic differences between CV17(膻中) and CV4(關元), ST3(巨髎) and CV4(關元), BL15(心兪), and BL23(腎兪) tended to decrease. Conclusion : After Korean Medicine treatment, thermographic differences between upper body and lower body tended to decrease cause shangrexiahanzheng(上熱下寒證) made by hysterectomy became moderated.