• The Journal of Korean Obstetrics and Gynecology
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• v.37 no.1
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• pp.60-74
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• 2024

Objectives: This review aimed at investigating the research trends of animal experiment on the acupuncture for premature ovarian failure (POF). Methods: Studies were searched from PubMed, Cochrane Library, EMBASE, CINK, KISS, RISS, OASIS, KMBASE up to November 2023. Terms as POF, acupuncture, electroacupuncture were used. Results: Of 189 screened, 13 studies are selected and analyzed. The combined results showed that treatment group was effective of improving serum sex hormones level, ovarian morphology, expression related mRNA and protein compared with control group. The most frequently used acupoints were SP6, CV4. Conclusions: Included studies showed that acupuncture might have effect on POF. Further research should be conducted to verify its therapeutic mechanisms and effectiveness.

• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.327-328
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• 2003

최근, 가정 안까지 고속광통신망이 구축되면서 폴리머광섬유 (polymer optical fiber, POF)에 대한 관심이 매우 증가하고 있다[l,2] POF는 빛을 전송하는 코어층과 내부전반사를 유도하면서 코어를 보호하는 클래드 층으로 구성되어 있다. 빛을 직접 전송하지 않으나 POF가 최적의 성능을 보이기 위해서는 적절한 클래드 선택이 중요하다. 그러나 PVDF/PMMA 블렌드, fluoroacrylate, VDF-HFP 공중합체 등이 클래드용 재료로 사용되고 있다는 사실만이 알려져 있을 뿐 보다 자세한 정보는 보고된 바 없다. (중략)

• 한국정보통신설비학회:학술대회논문집
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• 2003.08a
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• pp.346-348
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• 2003

본 논문에서는 플라스틱 광섬유용(POF) 광커넥터와 광송수신모듈을 설계. 제작하여 특성을 평가하였다. 650nm와 850nm POF 광커넥터는 광학적, 기계적, 환경적 신뢰성 시험을 통해 안정성을 확증할 수 있었다. POF 광송수신모듈은 1.25Gbps와 155Mbps급의 SC, RJ-45 형태의 구조로 제작되었고, 이를 적용하여 S/W Hub 및 광전 Outlet, Media Converter등을 구현하였다.

• Korean Journal of Optics and Photonics
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• v.24 no.1
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• pp.17-22
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• 2013

High performance plastic optical fiber (POF) $N{\times}N$ star couplers are implemented based on fusing and combining technology. A set of cladding-removed POFs are fused into a solid body by heating and pressing them together to form the transition region between the input and output sides. The operation principle of the proposed star coupler is explained based on ray optics. To demonstrate the performance of the device, $2{\times}2$, $4{\times}4$ and $6{\times}6$ type POF couplers were fabricated and characterized. Performances of the POF star couplers were evaluated in terms of the flatness of the coupling ratios and excess losses.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.1
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• pp.11-16
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• 2014

In this paper, we proposed and demonstrated $1{\times}7$ type plastic optical fiber(POF) coupler incorporating a tapered acrylic cylinder which works optical combining and dividing region. A fabricated POF coupler showd 2.27~3.31 dB of insertion loss for optical combining and 8.67~11.27dB of insertion loss for optical spitting.

• Proceedings of the KIEE Conference
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• 1990.11a
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• pp.161-165
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• 1990

KEPCO has experienced eight oil leakage failures due to POF cable corrosion in the 154KV underground POF cable transmission line since the line was operated in 1976. Experimentally, We have verified that the cause of the failure is electrolytic corrosion of the cable owing to subway leakage current. For the countermeasure, We adopted the total Cathodic Protection System by the use of Victim Anode, Forced Drainage Method and Impressed Current Method with polarization cell.

• Textile Coloration and Finishing
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• v.5 no.1
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• pp.19-25
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• 1993

Plastic optical fibers(POFs) composed of poly(methylmethacrylate) (PMMA), polystyrene (PS), or polycarbonate(PC) as a core materials, and of fluorinated polymer or PMMA as a cladding were fabricated and their properties were investigated in this study. The attenuation loss of PMAA core POF was about 1,700 dB/Km at 660 nm, the loss of PS core POF was 1,800 dB/Km at 560 nm, and the loss of PC core POF was 2,200 dB/Km at 780 nm. These attenuation losses of POFs prepared ill this study were higher than those of commerically available POFs. Compared to PMMA and PS core POFs, PC core POF has excellent characteristics, including high thermal stability, high flexibility, and high impact strength.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.31 no.5
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• pp.435-439
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• 2009

The peripheral ossifying fibroma(POF) is a relatively common, non-neoplastic gingival growth that is classified as a reactive hyperplastic inflammatory lesion. The clinical appearance of POF is generally a small, well-circumscribed, focal mass with a sessile or pedunculated base. The pathogenesis of this lesion is uncertain. POFs are believed to arise from cells of the periodontal ligament as hyperplastic growth of tissue that is unique to the gingival mucosa. Approximately 60% of POFs occur in the maxilla, and 55%-60% of all cases occur in the incisor-canine area. Most lesions are less than 2 cm in size. To our knowledge, huge POF of approximately 8 cm in size in the lower posterior edentulous ridge has not been previously described in the English literature. We report an unusually huge POF overlying the lower posterior edentulous ridge mucosa, along with long-term follow up result.

• Proceedings of the Optical Society of Korea Conference
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• 2005.02a
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• pp.328-329
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• 2005

• Proceedings of the Optical Society of Korea Conference
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• 2004.02a
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• pp.132-133
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• 2004