• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.6
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• pp.78-86
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• 2014

In this paper, a novel intensity-based fiber optic vibration sensor using a mass-spring structure, which consists of four serpentine flexure springs and a rectangular aperture within a proof mass, is proposed and its feasibility test is given by the simulation and experiment. An optical collimator is used to broaden the beam which is modulated by the displacement of the rectangular aperture within the proof mass. The proposed fiber optic vibration sensor has been analyzed and designed in terms of the optical and mechanical parts. A mechanical structure has been designed using theoretical analysis, mathematical modeling, and 3D FEM (Finite Element Method) simulation. The relative aperture displacement according to the base vibration is given using FEM simulation, while the output beam power according to the relative displacement is measured by experiment. The simulated sensor sensitivity of $15.731{\mu}W/G$ and detection range of ${\pm}6.087G$ are given. By using reference signal, the output signal with 0.75% relative error shows a good stability. The proposed vibration sensor structure has the advantages of a simple structure, low cost, and multi-point sensing characteristic. It also has the potential to be made by MEMS (Micro-Electro-Mechanical System) technology.

• Journal of Acupuncture Research
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• v.18 no.3
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• pp.154-170
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• 2001

Objective : To broaden understanding about acupuncture and moxibustion therapy on AIDS and to promote base studies and clinical trials Materials and Methods : Analysis was given to more than 30 literatures including acupuncture and moxibustion therapy on AIDS-related sites explored by internet search engine named NAVER from Nov., 2000 to Feb. 20th, 2001 Results : 1. Acupuncture and moxibustion played great role as a complementary therapy in enabling AIDS patients to keep their antiretroviral therapy by enhancing immune system, ameliorating AIDS-related symptoms and side effect of antiretroviral drug 2. Acupuncture and moxibustion therapy had a broad spectrum indication from systemic or local signs of AIDS patients to signs of antiretroviral drug-related side effect 3. Contraindication of acupuncture and moxibustion therapy against AIDS patients include abstraction and moxibustion on the skin lesion, because of their easy exposure to inflammation 4. AIDS patients were regarded as the state of KI-HE(氣虛), EUM-HE(陰虛), YEOL-DOK(熱毒) in general 5. BO-KI(補氣), BO-HYUL(補血), BO-EUM(補陰), CHEONG-YEOL-HAE-DOK(淸熱解毒) were shown as a principle of acupuncture and moxibustion therapy for AIDS patients 6. Principle of selecting acupoints for AIDS patients had characteristics of enhancing immune system, detoxicating detrimental agents and relieving each AIDS related symptom appropriately 7. Acupuncture on 合谷(HAPKOK, LI4), 內關(NAE-GWAN, P6), 足三里(CHOK-SAMNI, S36) were applied to the early stage of AIDS in order to enhance immune system. Acupuncture on 血海(HYOLHAE, SP10), 三陰交(SAMUMGYO, SP6), (KOHWANG, B43) were applied to the intermediate stage of AIDS so as to enhance immune system and eliminate YEOL-DOK(熱毒) in blood. Moxibustion on 湧泉(YONGCHON, K1), 足三里(CHOK-SAMNI, S36) were applied to the late stage owing to enhance immune system more. Conclusion : The efficacy of acupuncture and moxibustion therapy on AIDS has been acknowledged to the world, moreover, it is proved to be significant as a complementary therapy on AIDS patients. Thus, more control group studies of the efficacy of acupuncture and moxibustion therapy on AIDS and clinical trials are considered to be necessary.

• Clinical and Experimental Pediatrics
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• v.48 no.8
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• pp.846-856
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• 2005

Purpose : To measure the peak myocardial tissue velocities and patterns of longitudinal motion of atrioventricular(AV) annuli and assess body weight and heart rates-related changes in normal children. Methods : Using pulsed wave Tissue Doppler Imaging(TDI), we measured peak systolic, early and late diastolic myocardial velocities in 72 normal children at six different sites in apical-4 chamber (A4C) view and at four different sites in apical-2 chamber(A2C) view and compared those values with each other, also observing effects with body weights and heart rates. Longitudinal motions of the AV annuli were measured at three different sites in A4C. Results : There were no significant differences of the TDI parameters between gender, ECHO-machines and among the three Doctors performing TDI. Peak myocardial velocities were significantly higher at the base of the heart than in the mid-ventricular region and in the right lateral ventricular wall than in the left lateral ventricular wall or IVS. The TDI parameters showed no significant correlation with fractional shortening(%). Peak systolic and early diastolic myocardial velocities had no correlation with heart rates, but peak late diastolic velocities and A/E ratio correlated positively with heart rates. Correlations between the TDI parameters and body weight were inconsistent. Absolute longitudinal displacement and % displacement were not differ between gender and not correlated with the TDI parameters. Conclusion : We measured the peak myocardial velocities with TDI and the longitudinal motion of the AV annuli using M-mode echocardiography in normal children. With more large scale evaluation, we may establish reference values in normal children and broaden clinical applicabilities in congenital and acquired heart diseases.