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Arrayed waveguide collimators for integrating free-space optics on polymeric waveguide devices.
Shin, Jin-Soo,Lee, Chang-Hee,Shin, Sang-Yung,Huang, Guang-Hao,Chu, Woo-Sung,Oh, Min-Cheol,Noh, Young-Ouk,Lee, Hyung-Jong Optical Society of America 2014 Optics express Vol.22 No.20
<P>Array-type optical devices are important for wavelength-division multiplexing optical communication system to achieve small footprint, mass production, and reliability. For fabricating transmitter module in an array configuration, it is difficult to achieve a passive alignment of isolator, collimating lens, and laser diode. To facilitate array isolator integration, a waveguide collimator is proposed in this work by using a low-contrast, large-core polymer waveguide. The diffraction of a guided mode propagating through a free-space region is suppressed by enlarging the guided mode. The fiber coupling loss due to the enlarged mode was overcome by incorporating an adiabatic taper structure. The excess loss of waveguide collimator including the loss through a 400-μm free-propagation region was less than 1.0 dB.</P>
Yung O . Shin,Elaine M . Elder,R . Wayne Atchison 대한바이러스학회 1981 Journal of Bacteriology and Virology Vol.11 No.1
Enzyme immunoassay (EIA) techniques were modified for the direct detection of influenza soluble antigens in patient specimens. Twenty-four available clinical specimens, previously tested by irnmunofluorescence(IIF) on cell culture isolates and by egg isolation (EGG) techniques, were retrospectively tested by 2 different methods of EIA, I.e., direct sorption type, EIA (DS), and double antibody, EIA (DA), EIA (DS) showed. 83.3% (20/24) agreement with IIF and 58.3% (14/24) agreement with EGG. EIA (DS) detected more positive specimens (50% 12/24) than EIA (DA) (36,8%, 8/24). EIA (DS) data showed the highest-agreement (91.7%, 22/24) with data obtained from both IIF and EGG; 2 specimens gave different results from those seen by IIF and EGG. With the advantages of its sensitivity, rapidity and sirnplicity, EIA test for the detection of influenza soluble antigen would be an important supplement to other standard techniques used in influenzal diagnosis.
Shin, Jin-Soo,Park, Tea-Hyun,Chu, Woo-Sung,Lee, Chang-Hee,Shin, Sang-Yung,Oh, Min-Cheol Optical Society of America 2015 Optics express Vol.23 No.13
<P>A tunable channel-drop filter as essential component for the wavelength-division-multiplexing optical communication system has been demonstrated, which is based on polymer waveguide Bragg reflectors. For an ordinary Bragg reflector, the filtered signal is reflected toward the input waveguide. Thus an external circulator is required to separate the filtered signal from the input port, though it increases the total footprint and cost. For this purpose, we employed dual Bragg reflectors and a mode sorting asymmetric X-junction. The Bragg reflector exhibited a maximum reflectivity of 94% for a 6-mm long grating, a 3-dB bandwidth of 0.39 nm and a 20-dB bandwidth of 2.6 nm. The mode sorting crosstalk in asymmetric X-junction was less than -20 dB, and linear wavelength tuning was achieved over 10 nm at the applied thermal power of 377 mW.</P>
Shin, Seungwon,Kim, Jinyoung,Yu, Ami,Seo, Hyung-Sik,Shin, Mi-Ran,Hong, Seung-Ug,Jung, Chan Yung,Kim, Koh-Woon,Cho, Jae-Heung,Lee, Euiju Hindawi 2018 Evidence-based Complementary and Alternative Medic Vol.2018 No.-
<P>Cervicogenic dizziness is dizziness triggered by movement or positioning of the cervical spine and is often accompanied by neck pain or stiffness. This is a prospective, pragmatic, assessor-blind, randomized controlled trial aimed at testing the efficacy and safety of adjuvant Chuna Manual Therapy (CMT) in patients with cervicogenic dizziness under usual care treatments. Fifty patients with cervicogenic dizziness will be randomly allocated to CMT or usual care (UC) groups in a 1 : 1 ratio. Extensive screening procedures, including examinations for central nervous system problems and nystagmus, will be applied to exclude other dizziness-inducing disorders. The eligible participants will receive 12 sessions of CMT plus UC or only UC over 6 weeks. CMT includes mandatory and discretionary techniques, whereas UC includes electrotherapy, thermotherapy, and patient education. The efficacy will be evaluated primarily as Dizziness Handicap Inventory score. The severity and frequency of dizziness, the level of neck pain or stiffness, and the cervical range of motion will also be evaluated. Safety will be assessed by adverse events. The data will be statistically analyzed at <I>p</I> < 0.05.<I> Trial Registration</I>. This trial was registered with Clinical Research Information Service (CRIS) in Korea, KCT0002565, on 29 November 2017, https://cris.nih.go.kr/cris/search/search_result_st01_kren.jsp?seq=9610<ype=&rtype=.</P>