• Archives of Plastic Surgery
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• 제44권1호
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• pp.65-71
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• 2017

Background This study evaluated dynamic changes in eyebrow position related to aging. Methods Female participants were recruited and separated into two groups aged 20-30 years (the younger group, n=20; mean age, 24.8 years) and 50-70 years (the older group, n=20; mean age, 55.8 years). Photogrammetry was used to determine the eyebrow position at the medial canthus (MC), lateral limbus, lateral canthus, and lateral end point (EP) for 6 actions: smooth opening (the reference action) and closing of the eye, forward gaze, maximum opening and closing of the eye, and maximum frown. Videos were also recorded. Results No differences in eyebrow position were detected at the MC when opening or closing the eyes smoothly, gazing straight ahead, or closing the eyes maximally. For all 6 actions, the position of the lateral EP in the older group was significantly lower than in the younger group (P=0.003), and the smallest degree of vertical movement at this point was found in both age groups (P<0.001). Vertical movement at the 4 landmarks of the eyebrows decreased with aging. Conclusions Eyebrow position was unchanged at the MC with aging, except at maximal eye opening and maximal frown. No differences in eyebrow position were observed between the younger and older groups when eyes were maximally closed, except at the EP. It is important to focus on correction of the lateral EP for periorbital rejuvenation.

• ETRI Journal
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• 제37권5호
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• pp.906-916
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• 2015

High-speed I/O channels require adaptive techniques to optimize the settings for filter tap weights at decision feedback equalization (DFE) read channels to compensate for channel inter-symbol interference (ISI) and crosstalk from multiple adjacent channels. Both ISI and crosstalk tend to vary with channel length, process, and temperature variations. Individually optimizing parameters such as those just mentioned leads to suboptimal solutions. We propose a joint optimization technique for crosstalk cancellation (XTC) at DFE to compensate for both ISI and XTC in high-speed I/O channels. The technique is used to compensate for between 15.7 dB and 19.7 dB of channel loss combined with a variety of crosstalk strengths from $60mV_{p-p}$ to $180mV_{p-p}$ adaptively, where the transmit non-return-to-zero signal amplitude is a constant $500mV_{p-p}$.

• 한국어류학회지
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• 제35권4호
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• pp.366-371
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• 2023

우리나라 제주도 남부 연안의 수심 14 m에서 채집된 1개체 (표준체장 70.5 mm)의 표본을 근거로 딱총새우류와 공생하는 망둑어과 어류 Amblyeleotris japonica를 한국 첫기록종으로 보고한다. 이 종은 몸이 다소 측편하고 새공 하단이 눈의 후연과 전새개골 하단의 중앙 아래에 위치하며, 제2등지느러미 기조수가 1극 12연조, 뒷지느러미 기조수가 1극 14연조, 종렬비늘수가 28개, 머리에서 꼬리자루까지의 몸 측면에 5개의 폭넓은 적갈색 횡대가 있는 점이 특징이다. 이 종의 속명과 국명에 대해 '새우붙이망둑속'과 '붉은동갈새우붙이망둑'을 신한국명으로 제안한다.