• 융합정보논문지
• /
• 제8권1호
• /
• pp.147-152
• /
• 2018

자외선 완전차단 및 청색광을 일부 차단하고 광변색성을 가지는 편광안경렌즈를 개발하였다. 심야 운전이나 반사광에 의한 눈부심을 획기적으로 줄이고 자외선이 강한 공간에서는 선글라스 역할을 하며 평상시는 안경렌즈로 사용할 수 있는 기능성 안경렌즈이다. 광변색성은 명반응에서는 0.5초 암반응에서는 3초 정도의 회복시간이 걸렸다. 편광기능은 95% 정도를 얻었다. 자외선은 완전히 차단되었고 청색광은 30%정도의 저감 효과를 얻었다. 광변색성 및 자외선차단기능과 편광기능을 하나로 결합한 렌즈는 국내 시장을 조사한 결과 최초의 시도이다.

• Journal of Advanced Marine Engineering and Technology
• /
• 제33권6호
• /
• pp.952-958
• /
• 2009

The International Maritime Organization (IMO) has adopted the ballast water management convention at a diplomatic conference in early 2004 that all ships should be equipped with a treatment system from 2010 gradually. In this paper, the disinfection characteristic of ultra-violet (UV) rays was studied and a ballast water treatment system (BWTS) which can treat $50m^3$/h sea water was manufactured. The system consists of a disinfection chamber with six 3.5 kW UV lamps which are operated by magnetic ballasts, a programmable logic controller (PLC) and set of pipe lines. The biological disinfection efficacy of the prototype BWTS was evaluated following the IMO rules using zooplankton such as Artemia and Rotifer species for the size over $50{\mu}m$, and phytoplankton such as Tetraselmis and Thalassiosira species for the size between 10 to $50{\mu}m$. From the experimental results, the disinfection efficacy was 99.99 % that meets the IMO requirement. However, more studies on an energy saving system are needed because the consumption power of the prototype system is as high as over 21 kWh for $50m^3$/h.

• 한국식품영양과학회지
• /
• 제14권1호
• /
• pp.57-60
• /
• 1985

녹두 종자 발아억제물질을 생산하는 균을 동정한 결과 Streptomyces luteogriseus로 판정 되었으며, 본 저해물질의 순도검정을 위해 silica gel thin layer chromatography를 행한 결과 BuOH-HOAc-formic acid-water(15 : 12 : 3 : 10)와 BuOH-HOAc-water(4 : 1 : 5)의 용매게에서 각 Rf 치는 0.85와 0.92 의 단일 spot가 확인되었다. 또한 본 저해물질의 주요 radical을 조사해 본 결과 phenol기, pyrimidine 기, amono 기, 환원당 및 auxin은 함유되지 않았으며 단지 UV조사에 의해 형광을 나타내었다. 본 저해물질의 UV spectrum은 ${\gamma}^{H20}_{max}=252$ 였으며, IR spectrum 에서는 $3300{\sim}3500,\;2900{\sim}3000,\;1600{\sim}1700$ 및 $1400cm^{(-1)}$의 peak가 인정되었다.

• 한국재료학회:학술대회논문집
• /
• 한국재료학회 2003년도 춘계학술발표강연 및 논문개요집
• /
• pp.220-220
• /
• 2003

The microencapsulation of droplets or particles within a solid shell leads to the formation of core-shell particles. Microencapsulation provides protection and controlled release of core materials such as drugs, vitamins, enzymes, perfumes, and the like. Such particles have, therefore, found a diverse range of applications in the pharmaceutical, agricultural, cosmetic, and food industries. UV absorbers are widely used for cosmetics to screen out ultra violet (UV) rays which have side effects on human skin. The absorbers are made generally from synthetic organic compounds, which can stimulate the human skins to develop allergic phenomena.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2009년도 추계학술대회 논문집
• /
• pp.211-213
• /
• 2009

This paper was studied about the ultra-violet rays(UV) image area and discharge quantity of 22.9kV class polymer insulator using UV camera. The UV image area was begun to observe to 60kV that is about 40% of breakdown voltage of polymer insulator and the area was increased by applied voltage. Also, the discharge quantity was increased at 60kV sharply. If the intensity of breakdown passes over about 40% we can know that need the check on the electrical facility.

• Journal of Welding and Joining
• /
• 제23권4호
• /
• pp.53-58
• /
• 2005

We designed a weld monitoring system with UV and IR sensors using a embedded DSP controller for implementing a distribution system; running stand alone and communication with outside by industrial standard protocols. Also this system provided a USB port in order to be acquiring data in PC. The user interface program in PC visualized the IR and W data in time, frequency and state space. A correlation of IR and UV signals showed closely related to weld quality. A rapid change of geometry can be found through a moving average filter. And the average value of IR signal at an interval represented a welding width and depth. Through these results, we proposed a monitoring algorithm for a integer type DSP.

• 조명전기설비학회논문지
• /
• 제26권5호
• /
• pp.91-96
• /
• 2012

The surface of bushing is contaminated with rain, dust, salt and others. A bushing with contaminations in air is serious problem in insulation. Therefore, it is important to understand the inspection and diagnoses of the safety. The ultra-violet rays(UV) camera has attracted interest from the view point of easy judgement. In this paper, we will report on the corona discharge characteristics of surface flashover model with contaminations in air. Also, UV images of discharge and corona pulse count in air are analyzed using prototype UV camera of Korea and a UV sensor with an optic lens. These results are studied at both AC and DC voltage under a non-uniform field.

• 전기학회논문지
• /
• 제59권11호
• /
• pp.2093-2102
• /
• 2010

In this paper, we introduce a fixer attaching robot system which is used to attach several fixers to a TV cabinet. It is necessary to automate the fixer attaching process for two reasons. One is that the process is very harmful because very strong ultraviolet rays are used in that process. The other is that the productivity and the overall quality of the end-product are determined by the fixer attaching process. We proposed 9 candidates for the robot system to be used in the fixer attaching process. Then we simulated cycle time for each of the 9 candidates with considering physical constraints. We also considered other aspects such as the easiness of implementation, possible interference with other mechanical structure, and cost etc. to choose one of the 9 candidates. We implemented the chosen robot system and adopted it in a TV manufacturing process.

• 조명전기설비학회논문지
• /
• 제25권5호
• /
• pp.98-103
• /
• 2011

Recently, UV(ultra-violet rays) camera has attracted a great deal of interest from the view point of easy judgement in inspections and diagnoses of the safety of power equipment. Especilly, UV camera is applied the inspection of UV with corona discharge. One of the most important and difficult problems is the basic research of filter design, materials and corona discharge. In this paper, we will report on the UV generation, corona pulse count and the polarity effect of positive and negative DC surface discharge in air. Also, corona discharge characteristics are analyzed using prototype UV camera of Korea. UV generation and corona pulse count due to surface discharge in positive needle is higher than that of negative needle.

• 한국응용약물학회:학술대회논문집
• /
• 한국응용약물학회 2007년도 Proceedings of The Convention
• /
• pp.117-126
• /
• 2007

Cosmetics have mild activity on the human body, and intended to be used for cleaning, beautifying the human body, and also keeping healthy skin or hair, promoting attractiveness or altering the appearance. Functional cosmetics, in other words cosmeceuticals, are restricted for following functions: 1) Whiten the skin tone by preventing deposition of melanin pigmentation or lightening of the color of melanin of skin, 2) alleviate or improve wrinkles of the skin, and 3) protect the skin from the ultra violet rays from the sun. According to the functions of the functional cosmetics, skin whitening products, anti-wrinkle products, and suntan & sunscreen products are manufactured. In order to manufacture and import the functional cosmetics in Korea, the approval process in KFDA is necessary. The review process in KFDA is performed based on The Korea Food and Drug Administration Notification 2007-44, "The Regulation of Reviewing the Functional Cosmetics" (June 29, 2007). Only after the approval of KFDA, functional cosmetics are allowed to advertise to the consumers for their functionality.