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Braiding machines of maypole type complex guide tracks. It is not easy to speed up driers while carriers are moving at high speed. This paper presents a new design approach using dynamic analysis and modeling for moving carriers on the guided tracks. The proposed approach will be shown to be effective by using simulation tool, WORKING MODEL 2D^??, for high drivers on new models of braiding machines of maypole type.
문자 정보 및 X-Ray, MRI, CT등과 같은 의료영상 정보를 취급하는 의료정보 시스템에서의 유사객체 검색을 지원하는 협력 의료정보 시스템의 설계에 대하여 논한다. 이를 위해 객체간 의미적 관련성을 기반으로 한 유사도 자동 추출 방식 및 지식베이스 구성 방식을 제안하고 이를 활용한 유사객체 검색에 대하여 논한다. 특히 의료영상을 객체 값으로 갖는 경우 객체간 유사도는 영상처리의 특징추출 방식에 의해 추출된 영상내에 출현하는 공간 객체의 위치, 면적, 둘레, 공간 객체간의 위상 관계 등의 공간 속성을 이용한다. 여기서 공간적 위치에 근거한 유사도는 공간 위치를 대표하는 Hilbert값의 분포와 빈도를 토대로 계산한다.
Background: Low-level laser therapy (LLLT) has been reported to promote hair growth in androgenic alopecia (AGA). Objectives: The aim of this study is to investigate clinical efficacy and safety of a brand-new home-use LLLT device with a newly designed array of light source and software optimized for individual types of AGA. Methods: The study was designed and conducted as a randomized, double-blind, sham device-controlled trial. 48 subjects (39 men and 9 women) were participated and randomly assigned in a 2:1 ratio to use either test device (LG Pra’L HGN1, LG electronics, Korea) or sham device. The subjects used LLLT device 3 times a week for a total of 16 weeks. Phototrichogram was used to measure hair density and hair thickness at 0, 8, and 16-week. Adverse events were closely monitored. Results: After 16 weeks using the device, the test group showed significant increase in hair terms of hair density and hair thickness compared to control. In the test group, the hair density increased 9.94% at 8-week and 18.34% at 16-week from baseline. The hair thickness increased 10.08% at 8-week and 16.29% at 16-week from baseline, too. Conclusion: The home-use LLLT device with novel array of light source and individualized program according to the types of hair loss appears to be an effective and safe treatment modality for both male and female AGA patients.
In order to lower the cost and expand the working range of pulse width modulation voltage source inverter (PWM-VSI), the control method under the overmodulation mode with a dc-link shunt resistor is developed. The voltage utilization according to un-implementable region is analyzed in overmodulation region. By using the conventional phase reconstruction method, the minimized un-implementable region can be achieved for maximizing voltage utilization and the minimizing total harmonic distortion (THD) under the overmodulation region. The new overmodulation voltage reference which has the same voltage utilization with original voltage reference is produced to minimize THD by using Fourier analysis. The effectiveness of proposed algorithm is verified through the THD comparison between conventional and proposed method. The experimental results verify the validity of new overmodulation control and behavior of phase current reconstruction method.
Background and Objectives Low-level laser therapy (LLLT) is used widely to promote hair growth in androgenetic alopecia (AGA). This study examined the clinical efficacy and safety of a home-use LLLT device with a newly designed array of light sources and software optimized for individual types of AGA. Materials and Methods The study was a randomized, double-blind, sham device-controlled trial. Forty-eight subjects (39 men and nine women) were assigned randomly in a 2:1 ratio to use either the test device (LG Pra’L HGN1, LG electronics, Korea) or sham device. The subjects used the LLLT device three times a week for 16 weeks. Phototrichogram was used to measure the hair density and hair thickness at 0, 8, and 16-weeks. Adverse events were closely monitored. Results After 16 weeks of using the device, the test group showed a significant increase in hair density and hair thickness compared to the control. In the test group, the hair density increased 6.96 counts/cm2 at eight weeks and 13.67 counts/cm2 at 16 weeks from the baseline. The hair thickness increased 7.21 μm at eight weeks and 11.80 μm at 16 weeks compared to the baseline. Conclusion The home-use LLLT device with a novel array of light sources and an individualized program according to the types of hair loss appears to be an effective and safe treatment modality for both male and female AGA patients.