• Title/Summary/Keyword: On-body device

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A Handset Antenna Design with the Real-Portable Mock-Up and Its HAC with the Hand-Effect (착용환경을 고려한 안테나 설계와 손 부착 시 HAC 지수의 관찰)

  • Kahng, Sungtek;Choi, Dong-Geun;Jeon, Jinsu;Park, Jeong-Hoon
    • Journal of Satellite, Information and Communications
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    • v.9 no.1
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    • pp.102-106
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    • 2014
  • In this paper, we investigate the realistic environment influence on the Hearing-Aid Compatibility(HAC) of the body-held device mock-up with a dual-band antenna. In detail, first, a dual-band internal antenna is designed considering the neighboring objects essential to a real attachable mobile device. This comes to reality by making its mock-up version. Second, the HAC of this device is simulated and measured for 'stand alone', and 'hand-held' cases. Particularly, the electromagnetic simulation of the designed antenna in the real device is verified by the standard measurement. Finally, the evaluated HAC is analyzed in terms of the relations with the bands, the mock-up environment and the hand effect.

The Analysis and Strengthening Method of Export Competitive Power of Medical Device Industry - With Respect to Medical Device Industry in Gangwon Area (의료기기산업의 수출경쟁력 분석 및 강화방안 -강원지역 의료기기산업을 중심으로-)

  • Lee, Kang-Bin
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.45
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    • pp.191-238
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    • 2010
  • The purpose of this paper is to make research on the trend of the worldwide medical device market, the trend of the medical device market in the major foreign countries, the present status of the medical device industry in Korea and Gangwon area, the present status of export competitive power and the SWOT analysis of competitive power of the medical device industry in Gangwon area, and the strengthening methods of export competitive power of the medical device industry in Gangwon area. As the research method, the questionaire for the strengthening of export competitive power of the medical device industry in Gangwon area was carried out from August 13 to Otober 22, 2009. The worldwide medical device market in 2008 is estimated at USD 210.2 billion, with the United States being the largest market, followed closely by Japan and Western Europe. In 2006, the worldwide export amount of medical devices recorded USD 121.1 billion and the worldwide import amount of medical devices recorded USD 126.3 billion. As of the end of 2008, the number of Korea's medical device manufacturers expanded to 1,726. The production amount of Korea's medical device industry in 2008 recorded 2,525 billion won, and the domestic market volume of medical devices in 2008 recorded 3,618 billion won. Korea's export amount of medical devices in 2008 recorded USD 1,132 million and recorded a 9.67% growth compared to the previous year, and the import amount of medical devices recorded USD 2,123 million and recorded a 1.43% reduction compared to the previous year. As of the end of 2008, the number of Gangwon area's medical device manufacturers expanded to 81. The production amount of Gangwon area's medical industry in 2008 recorded 380 billion won, and Gangwon area's export amount of medical devices recorded USD 269 million and recorded a 0.25% reduction compared to the previous year, and the import amount of medical devices recorded USD 3 million and recorded a 39.63% reduction compared to the previous year. According to the result analysis of the questionaire for the strengthening of export competitive power of medical device industry in Gangwon area(August 13~October 22, 2009), the competing country of the export medical device is the United States being the highest ranking. Comparing to the collective competitive power level 100 of the competing country, the collective competitive level of the export medical device is 60 below and 70-80 below being the highest ranking. Comparing to the quality level 100 of the United States, EU and Japan, the quality level of the export medical device is 80-90 below being the highest ranking. Comparing to the design level 100 of the United States, EU and Japan, the design level of the export medical device is 90-100 below being the highest ranking. Comparing to the technology level 100 of the United States, EU and Japan, the technology level of the export medical device is 80-90 below being the highest ranking. According to the SWOT analysis of competitive power of medical device industry in Gangwon area, the strength is the abundant expert manpower of the medical device in Wonju area. The weakness is the fragility of the brand recognition of the medical device industry. The opportunity is the demand increase of the new medical device owing to the advanced age of population. The threat is the difficulty of entry into overseas market owing to the request of the new specification certification of the medical device. In order to strengthen the export competitive power of the medical device industry in Gangwon area, the following measures should be taken by the government, local self-government body, related organization and medical device industry : the development of new technology and design, the enhancement of brand recognition. the acquisition of the foreign specification certification, the building of overseas distribution channel and after sales service channel, the positive participation in overseas medical device exhibition and opening of medical device exhibition, the training of expert manpower, the strengthening of overseas marketing, and the application of FTA and the establishment of counter measures against FTA. In conclusion, the medical device industry in Gangwon area has the difficulty in the entry into the overseas market owing to the shortage of overseas marketing capability. Therefore, the government and local self-government body should make the intensive and systematical support for overseas marketing of the medical device industry. For the support of overseas marketing, the government and local self-government body should provide positively the support of expenses for the acquisition of foreign specification certification, the support of participation in the overseas medical device exhibition, the despatch of market development mission, the increase of the support amount for R&D investment fund, and the training of expert manpower of medical devices.

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Using 3D image-based body shape Measurement to increase the accuracy of body shape Measurement (체형 측정의 정확도를 높이기 위한 3차원 영상 기반의 체형 측정 활용)

  • So, Ji Ho;Jeon, Young-Ju
    • The Journal of the Convergence on Culture Technology
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    • v.6 no.4
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    • pp.803-806
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    • 2020
  • The body shape measurement method using 3D images has been widely used due to the recent development of 3D measurement cameras and algorithms. Existing 3D imaging devices are expensive devices, and there is a limit to their universalization. Due to the recent spread of inexpensive 3D cameras and the development of various measurement methods, various possibilities are being shown. It is expected to have a great impact on the medical device market that requires accurate data collection. Various medical device products using artificial intelligence are emerging, and accurate data collection is the most important to develop accurate artificial intelligence algorithms. Collection equipment using 3D cameras is expected to act as a major factor in the development of artificial intelligence algorithms using 3D images.

The Development of Acupuncture- Moxibustion Device for 4 points around GV20(Baihui) (백회와 사신총 혈위에 적합한 침구 소자의 개발)

  • Jo, Bongkwan
    • The Journal of the Society of Korean Medicine Diagnostics
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    • v.19 no.2
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    • pp.101-108
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    • 2015
  • Objectives This paper focused on developing the acupuncture-moxibustion device for head. Disadvantages of the existing devices for head moxibustion are its hume and inconvenience in operating because of the hair. Methods The proposed acupuncture-moxibustion device for GV20(Baihui) is 10mm long as needle body and 6mm long as needle root whose feature are 1~2 turns spiral coil. The spiral coil contains the moxa in order not to drop the moxa while operating Results The direct temperature on the burning moxa were measured by TK-305 infrared thermometer. But the direct temperature on the needle of acupuncture-moxibustion device were not able to measure by TK-305 infrared thermometer. By definition equation, the indirect temperatures on the needle of acupuncture-moxibustion device were able to be calculated. Conclusion A very safe, small and cheap acupuncture-moxibustion device for GV20(Baihui) of head is proposed. It will be useful to generate the heat shock protein and to operate in preventing and curing the Alzheimer's disease.

The Effects of Functional Electrical Stimulation on Abdominal Obesity Improvement of Adult Women by EMG, Ultrasound and DITI (근전도, 초음파와 DITI를 이용한 전기자극의 성인여성 복부비만 개선 효과 관찰)

  • Lee, Hyun-Ju;Tae, Ki-Sik
    • Journal of the Korean Society for Precision Engineering
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    • v.31 no.11
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    • pp.1051-1058
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    • 2014
  • In this study, we investigated the improvement effect of obesity by treatment with a developed low frequency electrical stimulation system. Thirty female in their 20's as an experiment subjects divided 3 groups(control, commercialized device, developed device) were treated with electrical stimulation on abdomen for 4 weeks. The body weight, body mass index(BMI), waist-hip ratio(WHR), muscle strength, muscle(transverse abdominis(TrA), internal obliquus abdominis(IO), external obliquus abdominis(EO)), fat thickness and abdominal surface temperature were measured by electromyogram(EMG), ultrasound and digital infrared thermal image(DITI). In the result, the body weight and BMI were decreased. Subcutaneous abdominal fat were significantly reduced after 4 weeks. The muscle strength and TrA muscle thickness was increased 13.2%(p<0.05), and 35.5%, respectively. The fat thickness showed decrease in abdomen (p<0.05). Infrared measurement on abdominal surface temperature as a parameter of improvement in blood circulation was significantly increased(p<0.05). Therefore, the low frequency stimulation showed positive effects on parameters of the obesity improvement.

A Study on the Reduction of Current Kink Effect in NMOSFET SOI Device (NMOSFET SOI 소자의 Current Kink Effect 감소에 관한 연구)

  • Han, Myoung-Seok;Lee, Chung-Keun;Hong, Shin-Nam
    • Journal of the Korean Institute of Telematics and Electronics T
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    • v.35T no.2
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    • pp.6-12
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    • 1998
  • Thin film SOI(Silicon-on-insulator) device offer unique advantages such as reduction in short channel effects, improvement of subthreshold slope, higher mobility, latch-up free nature, and so on. But these devices exhibit floating-body effet such as current kink which inhibits the proper device operation. In this paper, the SOI NMOSFET with a T-type gate structure is proposed to solve the above problem. To simulate the proposed device with TSUPREM-4, the part of gate oxide was considered to be 30nm thicker than the normal gate oxide. The I-V characteristics were simulated with 2D MEDICI. Since part of gate oxide has different oxide thickness, the gate electric field strength is not same throughout the gate and hence the impact ionization current is reduced. The current kink effect will be reduced as the impact ionization current drop. The reduction of current kink effect for the proposed device structure were shown using MEDICI by the simulation of impact ionization current, I-V characteristics, and hole current distribution.

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A Study on the Physical Model Establishment of Hydraulic Secondary Conversion Device of Wavestar Type Wave Power Generator (WAVESTAR형 파력발전장치의 유압식 2차변환장치의 물리모델 구축에 관한 연구)

  • Lee, Jung-Hee;Oh, Jaewon;Ha, Yoon-Jin;Park, Ji-Yong;Cheon, Ho-Jeong;Kim, Kyong-Hwan
    • Journal of the Korean Society of Industry Convergence
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    • v.23 no.6_2
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    • pp.999-1006
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    • 2020
  • This study was conducted to develop an efficiency prediction program of a hydraulic secondary energy converter for calculating annual power generation of a Wavestar type wave power generator. Using the period and wave height obtained from the frequency domain analysis, the behavior of the floating body was obtained by assuming the sin function. The piston displacement and speed of the hydraulic cylinder were calculated considering the behavior of the floating body and the shape of the mechanism. The numerical simulation of the hydraulic system was performed by physically modeling the hydraulic cylinders, check valves, hydraulic motors, which are the main devices. In the future, this analysis program will be used to develop a program for estimating annual power generation of a moveable body type wave power generation device.

Low Specific On-resistance SOI LDMOS Device with P+P-top Layer in the Drift Region

  • Yao, Jia-Fei;Guo, Yu-Feng;Xu, Guang-Ming;Hua, Ting-Ting;Lin, Hong;Xiao, Jian
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.14 no.5
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    • pp.673-681
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    • 2014
  • In this paper, a novel low specific on-resistance SOI LDMOS Device with P+P-top layer in the drift region is proposed and investigated using a two dimensional device simulator, MEDICI. The structure is characterized by a heavily-doped $P^+$ region which is connected to the P-top layer in the drift region. The $P^+$ region can modulates the surface electric field profile, increases the drift doping concentration and reduces the sensitivity of the breakdown voltage on the geometry parameters. Compared to the conventional D-RESURF device, a 25.8% decrease in specific on-resistance and a 48.2% increase in figure of merit can be obtained in the novel device. Furthermore, the novel $P^+P$-top device also present cost efficiency due to the fact that the $P^+$ region can be fabricated together with the P-type body contact region without any additional mask.

A Study on Separation Stability of The Umbilical Plug of A Store (발사체의 배꼽 플러그 분리 안정성 연구)

  • Kim, Yongil
    • Journal of the Korea Institute of Military Science and Technology
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    • v.22 no.4
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    • pp.441-451
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    • 2019
  • When a store is launched, the umbilical plug should be separated from the launcher without any physical interference and fragments. In order to satisfy these conditions, an umbilical plug and an umbilical separating device were designed. The plug is separated from the receptacle of the store while moving along inclined planes by the store thrust and the spring force connected from the launcher to the plug. As a result of the prototype test, the hanger on the store collided with the plug. Several tests were conducted after some actions were taken to prevent the collision. However, not only the same phenomenon was repeated, but also fragmentation occurred. In this study, the non-colliding conditions were analyzed through rigid and flexible multi-body dynamics analysis.

Structure Optimization of ESD Diodes for Input Protection of CMOS RF ICs

  • Choi, Jin-Young
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.17 no.3
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    • pp.401-410
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    • 2017
  • In this work, we show that the excessive lattice heating problem due to parasitic pnp transistor action in the diode electrostatic discharge (ESD) protection device in the diode input protection circuit, which is favorably used in CMOS RF ICs, can be solved by adopting a symmetrical cathode structure. To explain how the recipe works, we construct an equivalent circuit for input human-body model (HBM) test environment of a CMOS chip equipped with the diode protection circuit, and execute mixed-mode transient simulations utilizing a 2-dimensional device simulator. We attempt an in-depth comparison study by varying device structures to suggest valuable design guidelines in designing the protection diodes connected to the $V_{DD}$ and $V_{SS}$ buses. Even though this work is based on mixed-mode simulations utilizing device and circuit simulators, the analysis given in this work clearly explain the mechanism involved, which cannot be done by measurements.