• Proceedings of the Korean Vacuum Society Conference
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• 한국진공학회 2005년도 제28회 학술발표회 초록집
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• pp.100-100
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• 2005

• Proceedings of the Korean Fiber Society Conference
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• 한국섬유공학회 2001년도 학술발표회 논문집(Proceedings of the Korean Textile Conference)
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• pp.213-215
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• 2001

• Polymer Science and Technology
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• 제18권4호
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• pp.338-345
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• 2007

• Polymer Science and Technology
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• 제21권4호
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• pp.336-344
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• 2010

• Proceedings of the Korean Vacuum Society Conference
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• 한국진공학회 2008년도 제35회 하계학술대회 초록집
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• pp.220-220
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• 2008

• Proceedings of the Korean Magnestics Society Conference
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• 한국자기학회 2017년도 임시총회 및 하계학술연구발표회
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• pp.11-11
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• 2017

• Proceedings of the Korean Vacuum Society Conference
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• 한국진공학회 2005년도 제29회 학술발표회 초록집
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• pp.50-50
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• 2005

• Journal of the Korean Society of Radiology
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• 제14권7호
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• pp.907-913
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• 2020

There have been continuous controversies on medical X-ray protection and numerous researchers have been trying to prevent unnecessary exposure to radiation. As X-ray passes through the patient and obtains an image, it creates scattered ray due to interactions such as photoelectric effect and Compton scattering with the subject. As a result, both medical radiation staff and patient are exposed to unnecessary radiation on areas other than the target area. In response, this study will be assuming a body of a female, radiating X-ray on the phantom under the conditions of lumbar spine AP test, and measuring scattered ray around breasts and thyroid glands. Then, The experiment results were as follows. After application of non-shielding material, the average of scattered ray was 0.88 mR in thyroid measurement, 3.34 mR, Lt Axillary 3.54 mR, and Rt Axillary 3.03 mR in mamonary measurement but, After application of shielding material, the average of scattered ray was 0.16 mR in thyroid measurement, 0.60 mR, Lt Axillary 0.64 mR, and Rt Axillary 0.54 mR in mamonary measurement showing average scattered ray protection effect of about 82%. This study suggested the manufacturing method of a Jelly-type shielding material, identified the possibilities of researches on mixing various substances with radiology field, and verified the usability of the Jelly-type shielding material as a substitute for existing protection tools.

• Journal of the Korean Vacuum Society
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• 제10권1호
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• pp.93-97
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• 2001

We introduce the structure and the capability of a UHV x-ray scattering system constructed for surface structural studies. The system consists of vacuum parts required for surface preparation and a vertical-horizontal diffractometer using the S2D2 geometry. To illustrate the capability of the system, we measured the 7$\times$7 reconstruction peak of a Si (111) surface. The peak count rate was 216 counts/sec and the domain size of the 7$\times$7 reconstruction was larger than 1600 $\AA$. This demonstrates that the system is capable of providing surface structural information.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• 제13권5호
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• pp.426-435
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• 2002

In this paper we present an indoor propagation model for indoor wireless LAN service in the ISM band. We primarily use a 3D ray tracing as well as a patch scattering model in order to take into account the indoor fixtures. Therefore input parameters such as indoor environment parameters and antenna's types, polarizations are considered. As the results, we present fading characteristics and rms delay spread from time delay spread. In order to investigate the accuracy of the presented model, comparisons of predictions with measurement and simulations are performed in indoor wireless LAN service environments. The results show that measurements and simulations are very similar. Therefore in this paper, the effect of presented indoor propagation model is confirmed.