• Title, Summary, Keyword: Sart

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Research and Proposal on One Mile SART

  • Hayashi, Shogo;Ide, Manami;Ogawa, Masayasu;Yim, Jeong-Bin
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.186-193
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    • 2004
  • As a point that should be improved further in present SART, the size, the number, and the economy were enumerated. Some SART developed to solve them in Japan were introduced in this paper. That is automatically operating SART, circular polarization SART and so on. In addition, One Mile SART was mentioned. It is SART miniaturized instead of limiting the function, because all crews and passengers can always carry the small and light SART. The parts were made for trial purposes and the performance was confirmed.

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A Study on development of SART (SART(SEARCH AND RESCUE RADAR TRANSPONDER)의 개발에 관한 연구)

  • 임종근;배정철;양규식;김기문
    • Journal of the Korean Institute of Navigation
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    • v.19 no.1
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    • pp.17-32
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    • 1995
  • SART(Search and Rescue Radar Transponder) is a radar transponder capable of operating in the 9GHz band, which is one element of GMDSS. The fundamental function of the SART is to indicate its position. Thus, it is so much available to assist SAR operation when an emergency and casualty occur at any sea area. In the thesis, we designed, manufactured each part of circuit to develop the advanced SART and configured to test the characteristics in many ways. As the result of detailed things, we confirmed that the developed SART could be high possibility of production.

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Three Dimensional Volume Reconstruction of an Object from X-ray Iamges using Uniform and Simultaneous ART (USART 방법에 의한 X선 영상으로부터의 삼차원 물체의 형상 복원)

  • Roh, Young-Jun;Cho, Hyung-Suck;Kim, Hyeong-Cheol;Kim, Jong-Hyung
    • Journal of Institute of Control, Robotics and Systems
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    • v.8 no.1
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    • pp.21-27
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    • 2002
  • Inspection and shape measurement of three-dimensional objects are widely needed in industries for quality monitoring and control. A number of visual or optical technologies have been successfully applied to measure three-dimensional surfaces. However, those conventional visual or optical methods have inherent shortcomings such as occlusion and variant surface reflection. X-ray vision system can be a good solution to these conventional problems, since we can extract the volume information including both the surface geometry and the inner structure of any objects. In the x-ray system, the surface condition of an object, whether it is lambertian or specular, does not affect the inherent characteristics of its x-ray images. In this paper, we propose a three-dimensional x-ray imaging method to reconstruct a three dimensional structure of an object out of two dimensional x-ray image sets. To achieve this by the proposed method, two or more x-ray images projected from different views are needed. Once these images are acquired, the simultaneous algebraic reconstruction technique(SART) is usually utilized. Since the existing SART algorithms have several shortcomings such as low performance in convergence and different convergence within the reconstruction volume of interest, an advanced SART algorithm named as USART(uniform SART) is proposed to avoid such shortcomings and improve the reconstruction performance. Because, each voxel within the volume is equally weighted to update instantaneous value of its internal density, it can achieve uniform convergence property of the reconstructed volume. The algorithm is simulated on various shapes of objects such as a pyramid, a hemisphere and a BGA model. Based on simulation results the performance of the proposed method is compared with that of the conventional SART method.

A Study on the Design and Fabrication of X-band Power Amplifier for SART (SART용 X-밴드 전력증폭기의 설계와 제작에 관한 연구)

  • 김철수;김미숙;최병하
    • Journal of the Korean Institute of Navigation
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    • v.23 no.3
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    • pp.29-34
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    • 1999
  • In this paper, an X-band power amplifier using GaAs FET was designed and fabricated, which is to be used as SART transmitter sweeping at the frequency range of 9.2 GHz~9.5 GHz. The amplifier is consist of two stages using ATF-46101 FET of Hewllett-Packard. Finally, the amplifier using microstrip line matching solution shows that MAG is 23 dB at the center frequency of 9.35 GHz.

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The Sogdian Descendants in Mongol and post-Mongol Central Asia: The Tajiks and Sarts

  • LEE, JOO-YUP
    • Acta Via Serica
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    • v.5 no.1
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    • pp.187-198
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    • 2020
  • This paper is devoted to the examination of the identity of the Sogdian descendants and their historical role in the second millennium CE. More specifically, it discusses the Sogdian connection to the later Iranic-speaking peoples of Central Asia, namely, the Sarts and the Tajiks. It then discusses the symbiotic relationship between the Sogdian descendants and the Mongols and the Mongol descendants (Chaghatays and Uzbeks) in Central Asia. In sum, this paper argues that the Sogdians did not perish after the Arab conquest of Central Asia in the eighth century CE. They survived under new exonyms Sart and Tajik. Like the Sogdians in pre-Islamic Central Asia, the Tajiks or Sarts played important historical roles in the Mongol and post-Mongol states of Central Asia, maintaining a symbiotic relationship with the nomad elites.

Induction Heating

  • Pongswatd, Sawai;Ukakimapurn, Prapart;Sriratana, Witsarut;Kummool, Sart
    • 제어로봇시스템학회:학술대회논문집
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    • pp.74.1-74
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    • 2002
  • $\textbullet$ INTRODUCTION $\textbullet$ PRINCIPLE AND THEORY $\textbullet$ DESIGN OF THE SYSTEM $\textbullet$ EXPERIMENT RESULT $\textbullet$ CONCLUSION $\textbullet$ REFERENCE

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University Students' Starts-up Intention and Its Antecedents: Focusing on Entrepreneurship Education for Freshman Orientation (대학생의 창업의도에 미치는 영향요인에 대한 연구: 신입생 Orientation 기업가정신 교육을 중심으로)

  • Yu, Jum Suk;Suh, Chang Soo;Yu, Yon Ho;Kim, Young Soo
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.11 no.5
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    • pp.91-104
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    • 2016
  • The major results of the study are as follows: First, the accomplishement needs and academic self-efficacy enables students with start-up education through studying immersion and entrepreneurship to set up realistic objectives for personal life and resolving unpredictable problems. Second, creativity does not significantly affect studying immersion, but the higher the creativity of students participating in start-up education, the higher the entrepreneurship compare to studying immersion. Third, studying immersion has a significant impact on entrepreneurship, but has less impact on student's intention for start-up. Students with higher studying immersion through start-up education has higher entrepreneurship spirit and as a result, higher intention for start-up. Finally, the limitation of the study was that the sample was taken only from the freshman of Soonchunhyang University. Therefore, further study is needed for students from all university with start-up education.

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Length of Conductive Measurement Based-on Basic Theory

  • Tanachaikhan, Lerdlekha;Sriratana, Witsarut;Kummool, Sart
    • 제어로봇시스템학회:학술대회논문집
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    • pp.86.2-86
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    • 2002
  • $\textbullet$ Contents 1 Abstract $\textbullet$ Contents 2 Introduction $\textbullet$ Contents 3 Design of the system $\textbullet$ Contents 4 System testing $\textbullet$ Contents 5 Conclusions $\textbullet$ Contents 6 References

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Center Determination for Cone-Beam X-ray Tomography

  • Narkbuakaew, W.;Ngamanekrat, S.;Withayachumnankul, W.;Pintavirooj, C.;Sangworasil, M.
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1885-1888
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    • 2004
  • In order to render 3D model of the bone, the stack of cross-sectional images must be reconstructed from a series of X-ray radiographs, served as the projections. In the case where the distance between x-ray source and detector is not infinite, image reconstruction from projection based on parallel-beam geometry provides an error in the cross-sectional image. In such case, image reconstruction from projection based on conebeam geometry must be exercised instead. This paper is devoted to the determination of detector center for SART conebeam Technique which is critically effect the performance of the resulting 3D modeling.

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