• 한국공작기계학회논문집
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• 제10권5호
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• pp.60-70
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• 2001

In multi-purpose lathe, the design of tilting turret slide system has an important and critical role to enhance accuracy of the machining process. Tilting turret unit is traveled by 3-axis slide systems. There is a need to design this part very carefully. In this research, 3-axis sliding system with tilting turret unit is modeled by considering the element dividing, material proprties, and boundary conditions with PATRAN. Normal mode and frequency analysis of each structures such as saddle, cared, and turret are simulated by NASTRAN, for the purpose of developing the effective design. The results of mode analysis and frequency analysis are visualized with PATRAN, and the design method which can solve the resornance problem by eigenvalues and eigenvectors of each axis is developed as well.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 제6회 학술대회 논문집 일렉트렛트 및 응용기술연구회
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• pp.47-51
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• 2004

The aspherical lens are used as objective lens of optical pickup. The sample product is made before manufacturing the injection mould of lens to examine the design factor. The optimum cutting conditions of the main spindle speed, the depth of cut, the feed rate are found when we cut PMMA and PC lens sample with ultra-precision SPDT. The demanded surface roughness 10 nm Ra, aspherical form error 0.5 ${\mu}m$ P-V for aspherical lens of optical data storage device are satisfied for PMMA, but not satisfied for PC.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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• pp.441-441
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• 2007

As Rhenium-Iridium{Re-Ir) coating possesses such features as, high hardness, high elasticity, abrasion resistance and chemical stability, there have been exerted continuous efforts in research works in a variety of fields, and this technology has also been applied widely to industrial areas. In this research, the optimal grinding condition was identified using Microlens Process Machine in order to contribute to the development of aspheric glass lens for mobile phone module having 3 mega pixel and 2.5X zoom, and molding core(WC) was manufactured having performed ultra-precision machining. Effects of Re-Ir coating on form accuracy (P-V) of molding core and surface roughness(Ra) were measured and evaluated.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.459-460
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• 2005

The global consumption of aspheric surfaces will expand rapidly on the Electronics and Optical Components, Information and Communications, Aerospace and Defense, and Medical optics markets etc. We must research on market, technology forecast and analysis of aspheric surfaces that is a principle step of ultra precision machine technology with a base one of optical elements. Especially, F-theta lens is one of the important parts in LSU(Laser scanning unit) because it affects on the optical performance of LSU dominantly. The core is most of important to produce plastic F-theta lens by plastic injection molding method, which is necessary to get the ultra-precision aspheric and non-axisymmetric machine processing technology.

• 한국연초학회지
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• 제16권1호
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• pp.84-89
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• 1994

Potato virus Y (PVY) is an important viral disease in burley tobacco in Korea and is mostly transmitted by green peach aphid, Myzus penicae, in nature. Effects of barrier nets on the immigration of the aphid population into tobacco fields and on the control of PVY were investigated in 3 tobacco fields with 1.8 m - height polyethylene (PE) nets on their outer - sides in Iseo - Myeon, Wanju - Kun, Cheonbuk. Immigration of aphids to the tobacco yields started at late April and reached maximum at early June. The immigrating aphid population was apparently blocked by the barrier nets to be reduced by 54-73%. PVY severity was also reduced by the barrier nets. However, the control value was variable, ranging 24-67%, which suggests that effect of the PE net barrier on the prevention of aphid-borne virus might be variable depending on the location and slope of the fields.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.777-780
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• 2005

The global consumption of aspheric surfaces will expand rapidly on the Electronics and Optical Components Information and Communications, Aerospace and Defense, and Medical optics markets etc. We must research on market, technology forecast and analysis of aspheric surfaces that is a principle step of ultra precision machine technology with a base one of optical elements. Especially, F-theta lens is one of the important parts in LSU(Laser scanning unit) because it affects on the optical performance of LSU dominantly. The core is most of important to produce plastic F-theta lens by plastic injection molding method, which is necessary to get the ultra-precision aspheric and non-axisymmetric machine processing technology.

• 한국미생물·생명공학회지
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• 제19권3호
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• pp.235-241
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• 1991

Streptomyces melanosporofaciens로 동정된 strain 88-GT-161 균주는, 그람양성세균 및 식물병원성 곰팡이에 각각 항균활성을 나타내는 phthalate 유도체 및 염기성 마크로라이드의 새로운 항생물질을 생산하는 것으로 밝혀졌다. 이들 활성물질들의 분리. 정제과정에서 in vitro 및 in vivo(포트 시험) 항균활성을 조사하였으며, phtahalate 유도체 항생물질은 IR, NMR, 질량분석 스펙트럼 조사를 통하여 bis(2-ethylexyl) phthalate(dioctyl phthalate)로 동정하였다. Dioctyl phthalate가 Streptomyces sp.에 의하여 생산되며 생합성된 이 화합물이 항균활성을 가진다는 사실이 보고된 것은 이것이 처음이다.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2011년도 한국컴퓨터종합학술대회논문집 Vol.38 No.1(A)
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• pp.120-123
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• 2011

모바일 디바이스와 플랫폼이 다양해지면서 개발 및 유지보수 비용이 증가하고 있다. 특히, 비즈니스 기능적인 요구사항을 충촉시킬 수 있는 사용자화면 개발방법이 중요해 지고, 높은 복잡도를 요구하는 모바일 어플리케이션의 문제점을 해결하고자 모바일 웹 어플리케이션이 등장하였다. 하지만 웹 기술요소만으로 사용자 화면을 개발하다 보니 서비스 성능이 저하됨 알 수 있었다. 이런 문제를 해결하기 위해서 하이브리드형 모바일 어플리케이tus 아키텍처를 제안만한다. 이는 웹 요소기술만을 사용하지 않고, 비즈니스 기능적인 요구사항을 충족시켜주기 위해서 UIFrame이라는 개념을 제안한다. 제안한 UIFrame 모델은 UI 표현능력, 서비스 성능향상과 디자이너의 영역과 개발자의 영역을 분리 함으로서 다양한 플랫폼에 대한 독립적이며 이식성이 우수하다. 또한 개발 효율성 및 유지보수가 용이함을 보인다.

• 대한족부족관절학회지
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• 제4권1호
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• pp.23-29
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• 2000

Acquired Hallux varus is defined radiographically by a negative metatarsophalangeal angle and clinically by adduction of the hallux on the first metatarsal and most commonly occurs after hallux valgus surgery. It's the prevalence has ranged from 2% to 17%. We report a case of hallux varus resulted from weakening of support of lateral soft tissue and resection of an excessive amount of the metatarsal head during a bunionectomy after initial correction of hallux valgus. We corrected the hallux varus deformity using transfer of extensor hallucis brevis tendon with reconstruction os lateral capsule.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.485-490
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• 2004

Recently, distribution transfer velocity was extremely lowered by high supply rate of vehicle and low road rate. Therefore expansions of transfer network these were subway, road and railway to recover competitive power as a reform measure of physical distribution traffic were become preference previous subject. For reason of that, an expansion of transfer network is meeting competitive power as selected an elevated road in the ground road network that condition of location calm and get out of the existing urban than the underground road to connect oversensitive a large city and expanded small and medium satellite town. In the meantime, while elevated structures construct, they go through the civilian residential section, agriculture land, etc. The consequence is that it raises a vibration, noise, dust, an infringement of the right to a view and an infringement of the right to a sunshine. In this study, we analyzed Quantitatively sunshine quantity with building 3D simulation model of civil structure. Therefore, we present as planning data to reduce a civilian appeal for dispute of the right to sunshine and an economic and time loss between the government and construction company In addition to that, for the standard of the standard plan of usable sunshine quantity program in the practical business, the building of convenient user interface will be the project to be done.