• Journal of the Daesoon Academy of Sciences
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• v.1
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• pp.37-47
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• 1996

• Journal of the Daesoon Academy of Sciences
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• v.1
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• pp.331-381
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• 1996

• Journal of the Daesoon Academy of Sciences
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• v.1
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• pp.413-443
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• 1996

• Journal of the Daesoon Academy of Sciences
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• v.1
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• pp.285-330
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• 1996

• Journal of the Daesoon Academy of Sciences
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• v.1
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• pp.159-211
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• 1996

• Journal of the Daesoon Academy of Sciences
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• v.1
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• pp.87-123
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• 1996

• Journal of Korean Ophthalmic Optics Society
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• v.7 no.1
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• pp.15-20
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• 2002

The Hydroxyethyl methacrylate(HEMA) was developped in 1960's and later the use of contact lenses increased. At present more and more people use RGP contact lenses. Due to the wide range of optical corrections available and due to their high oxygen transmission Japanese and Korean people like them. Nevertheless one of nine CL users(beginners) stopped wearing the CL within the first year. We conducted a survey to evaluate the level of patient compliance in lens care and maintenance and to assess practitioner knowledge of contact lens information. Generally 6% of contact lens wearers drop out per year. The aim of this research was to find out what opticians can do to reduce the drop-out rate by getting information on handling, on general data of the patient and on optical prescription. Lens wearer were asked to complete a 10 question survey that focused on lens care-wear modality, lens replacement, storage, symptoms and case disinfection. There were total 180 participants in the study. Most of contact lens wearers have an inadequate understanding of contact lens care system. Therefore, it is important that contact lens specialists place more emphasis on practitioner education about general contact lens fields and reinforce patient education during the dispensing visit.

• The Journal of the Korea Contents Association
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• v.9 no.3
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• pp.250-255
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• 2009

This study performed and evaluated the performance test in 40 general X-ray units among diagnostic X-ray units, which were being used in hospitals of gyeongsangnam-do gimhae-si through X-ray tube variable limiting device ability test, the light field and X-ray field alignment test and collimation and beam alignment test of diagnostic X-ray unit. The results are as followings: In a variable beam limiting device ability test, the result of maximum X-ray field test showed that 4(10%) of were incongruent while the result of minimum X-ray field test represented that 5(12.5%) of were incongruent. The result of the light field and X-ray field alignment test showed 23(57.5%) of were within 2% of maximum permissible level and the other 17(42.5%) units were misalignment. The result of beam alignment test represented that 11(27.5%) coincided and another 11(27.5%) within $0.5^{\circ}$ respectively, 10(25%) were $0.6^{\circ}-1.5^{\circ}$ intervals, 7(17.5%) were $1.6^{\circ}-3^{\circ}$ and 1(2.5%) were more than $3^{\circ}$.

• Convergence Security Journal
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• v.1 no.1
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• pp.83-99
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• 2001

인터넷이 발전해감에 따라 사이버 세계라고 하는 대규모 네트워크 환경이라는 또 다른 세상이 창출되었다. 그러나 대규모 네트워크 환경하에서는 정보보호의 취약성 때문에 인터넷 서비스를 이용하는 네티즌들의 안전성이 보장되지 않는다. 이처럼 불법 침입자들로부터 선의의 이용자를 보호하기 위해서는 그들이 해킹 기법과 그 대응책을 숙지해야 할 것이다. 이 논문에서는 대규모 네트워크 환경하에서 발생되고 있는 해킹에 대하여 분석하고 그에 대한 대책을 제시하는데 그 목적이 있다.

• The Science & Technology
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• v.31 no.4 s.347
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• pp.18-19
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• 1998

탄소로 구성된 분자인 「나노튜브」를 다발모양으로 합성하면 성질이 바뀌어 반도체가 된다는 사실을 밝혀내 세계적 관심을 모으고 있는 서울대 자연과학대 물리학과 임지순교수를 만나보았다. 탄소 나노튜브를 활용해서 기존 실리콘 반도체보다 1만배까지 높은 초고집적 반도체 소자를 만들 수 있는 길을 연 임교수는 앞으로 나노튜브다발의 반도체저거 성질을 조절하는 방법을 찾아내는 연구를 계속할 것이라고 말했다.