• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.504-507
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• 2005

차세데 홈네트워크 환경하에서는 다양한 데이터 통신 무선기기들이 홈/오피스에서 공존할 것이다. 예를들어 무선랜, 블루투스(Bluetooth), 지그비(Zigbee), 무선 USB, UWB(Ultra Wideband) 등이 함께 주파수를 공유하게 될 것이며, 특히 ISM 대역은 서비스, 산업, 의료용 등으로 다양한 응용이 가느하기 때문에 전파 간섭이 예상된다. 본 논문에서는 IEEE 802.11b 무선랜(WLAN)과 IEEE 802.15.4 저전력 저속 무선팬(WPAN) 무선기기에 대하여 간섭실험을 하였으며 두 무선기기가 상호 공존할 수 있는 공유 조건에 대해 분석하였다. 무선랜(WLAN)과 무선팬(WPAN)의 주파수 대역이 완전히 오버랩된 경우 간섭 레벨과 무선팬의 패킷 전송 횟수를 변화 시켜 상호간의 간섭 영향 저도를 측정하고 상호 무선기기간의 간섭 결과를 바탕으로 상호 무선기기간의 주파수 공유 조건을 제시하고자 한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.4
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• pp.785-790
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• 2020

In addition to the Fourth Industrial Revolution, interest and research on medical information are actively being conducted. As the technologies using short-range low-power wireless communication are applied in connection with mobile devices, the utilization of them in medical institutions is gradually increasing, and the demand of customers who want to receive high-quality services using IT technology is increasing in the medical environment according to the development and change of technology. In addition, modern people who are familiar with smart equipment and consider the value of time is important do not waste their time through rapid service. In addition, as the recent epidemics including Coronavirus Disease 2019 (COVID-19) have become popular, interest in untapped (non-face-to-face) has increased, and social distance is needed as a preliminary measure against infectious diseases. For this reason, this study studied the untapped-based medical reception system to provide quick service to patients using short-range low-power wireless communication and to provide safer and more comfortable environment for medical staff and visitors.

• The Journal of the Korea Contents Association
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• v.10 no.8
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• pp.266-273
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• 2010

In terms of worldwide rapid change in medical world, the purpose of this study is to investigate perception and attitude of students in dental hygienics concerning the opening of domestic medical market to overseas, so that it can prepare a chance to correctly identify positive and negative aspects of such change in medical market. For questions about effects of opening domestic medical market to overseas as well as pros and contras about it, it was found that there were significant differences in 'improved level of medical technology', 'reduced national medical expenses', 'extended supply of medical facilities' and 'facilitated medicine and medical equipment industry.'(p<0.00). For a question about perception of potential crisis from opening of domestic medical market to overseas, it was found that 55.6% of pro group had no mind of such crisis, whereas 52.3% of contra group had such a mind of crisis. Both cases showed significant differences on a statistical basis (p<0.003). It is recommended that follow-up studies should make a comparative analysis involving students in public health as well as dental hygienics so as to explore even possible ways to take measures for opening of domestic medical market to overseas.

• Journal of Industrial Technology
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• v.26 no.B
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• pp.35-41
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• 2006

Recently, as ultrasonic medical devices are gradually developed, many of those requires smaller and more precision coaxial cables in probe. So, the use of micro coaxial cable becomes an efficient solution for ultrasonic machine. However, there are many difficulties in stripping micro coaxial cable by traditional mechanical process. In this paper, we use the Nd-YAG laser for the efficient stripping of conduct wire of cable. We propose a new method to strip the shield wire of micro coaxial cable. Through some experiments, we found that there is a new possibility in the proposed method. Also, in order to enhance the performance, we propose a preprocess of the cable before stripping.

• Prospectives of Industrial Chemistry
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• v.22 no.1
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• pp.12-22
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• 2019

탈모 인구의 증가로 국내 탈모 시장이 빠르게 팽창하고 있으며, 탈모 관련 산업이 성장기에 진입하였다. 탈모시장은 탈모관리제품, 기기, 관리실 및 의료 시술로 세분화되고 있으며 관련 신제품들이 개발되고 있지만 샴푸와 같은 화장품 시장의 규모가 가장 크게 자리 잡고 있는 상황이다. 세계 헤어케어 관련 화장품 시장은 중국의 탈모 관련 미용산업 시장규모가 매우 크며, 국내 기업들도 중국 탈모 시장에 선진출하기 위해 제품개발 및 마케팅을 강화하고 있다. 이러한 시장동향과 더불어 국내에서는 새로운 소재 개발과 함께 안전하고 기능성이 뛰어난 탈모방지 화장품의 요구가 확대되고 있는 추세이다. 따라서 본 기획에서는 현재 기능성 헤어케어 제품들의 시장분석과 동업계 현황, 5-Force 분석을 통한 경쟁상황, 수요전망 등에 대하여 소개하고, 향후 탈모방지 화장품시장의 발전 가능성과 향후 전략 방안을 제시하고자 한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.5
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• pp.975-980
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• 2021

As technology utilizing low-power short-range wireless communication is applied in conjunction with medical information as a development of the fourth industrial revolution, interest in medical information is increasing. As the age group of smart devices increases and becomes more common, related research such as linking mobile devices with various objects and equipment is continuously being conducted. In addition, interest in untact (non-face-to-face) is increasing due to the prevalence of Coronavirus Disease-19 (COVID-19), including various infectious diseases. As a result, it is a state that requires distance not only in social but also in life. In this study, using a low-power near-field wireless communication technology of beacons to create an IoT device by communicating with the web server of the medical information system was studied to make it easier to receive medical treatment during visits to medical institutions.

• Journal of Biomedical Engineering Research
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• v.43 no.5
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• pp.319-330
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• 2022

In this study, the optimal driving frequency was derived through finite element analysis (FEA) to optimize the developed piezoelectric ultrasonic medical devices(PUMD) for bone surgery. The core of the PUMD is the piezoelectric ceramic (PZT), which is a vibrator that generates vibration energy. The piezoelectric ceramic shows the maximum current value with respect to the input voltage at the resonance frequency, which generates the maximum mechanical vibration. In the past, various studies have been conducted related to the analysis of PUMD, but most of the research so far has been limited to free vibration analysis. However, in order to derive the accurate resonant frequency, the initial stress generated by bolt tightening in the bolt-clamped Langevin type transducer (BLT) must be considered. In this study, after designing a PUMD, the driving performance according to the bolt tightening value was analyzed through FEA, and this was experimentally verified. First, the resonance mode and frequency response were confirmed through modal and harmonic analysis at 20-40 kHz, which is known as the optimal driving frequency band of PUMD for bone surgery. In addition, the design of the PUMD was confirmed by checking the mechanical behavior of the tip and the piezoelectric ceramic at the resonant frequency. Consequentially, the characteristic evaluation was performed, and it was confirmed that the resonant frequency result derived through the FEA was reasonable. Through this study, we presented a more rational FEA method than before for BLT transducers. We expect that this will shorten the time and cost of developing a PUMD, and will enable the development of more stable and high-quality products.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1468-1469
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• 2007

포항가속기 연구소에서는 RIS 프로젝트 사업과제의 일환인 L-band 산업용 전자빔 가속기의 제작 및 기술개발 연구를 철원의 물리기술연고소 주관으로 수행하고 있다. L-band 산업용 전자빔 가속기는 전자빔에 의한 고분자개질 공정, 농수산물의 멸균 및 의료기기의 멸균 등에 적용이 가능하다. 포항가속기연구소에서는 10 MeV급 산업용 전자빔 조사장치에 적용되는 RF증폭기용 펄스 전원장치인 모듈레이터를 설계, 제작을 하였다. 펄스 전원장치인 이 모듈레이터 시스템은 평균 출력 60 kW, 펄스폭 7 us, 펄스반복율 300 Hz의 L-band 상업용 RF 증폭기 전원장치이며, RF 증폭기로 사용되는 클라이스트론은 Thales 사의 TV2022D를 사용하였다. 본 논문에서는 펄스 전원장치인 모듈레이터의 운전과 인터록을 위한 제어장치의 개발과 제작에 대하여 논하고자 한다.

• Journal of Biomedical Engineering Research
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• v.43 no.3
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• pp.153-160
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• 2022

As new types of medical devices are emerging through convergence with advanced technology, innovative technologies are becoming hot issues in health policy because of their disruptiveness. This study analyzed the innovative medical device management systems in the US, China and Korea. Innovative medical devices have been defined differently depending on the country's management system, but in common, they are defined as products that do not exist or have dramatically improved performance compare to existing products by applying innovative technologies. Innovative medical devices have been supported by regulatory authorities during product development and approval processes. While the US and China have more than 300 products designated as innovative medical devices with diverse functions, application fields, and manufacturing countries considering the initial situation of the implementation for the system, Korea has only 16 products, mainly radiology and diagnostic devices and made in Korea only as innovative medical device. In addition, Korea shows the highest market approval rate of innovative medical devices compare to the US and China, and it is necessary to prepare the approval process in consideration of product diversity.

• Korea Trade Review
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• v.48 no.3
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• pp.131-150
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• 2023

The purpose of this study was to find a countermeasure to the U.S. import refusals for the Korean healthcare and life sciences industry. To this end, an analysis of trends during the pandemic was conducted using the KITA Border Rejection Database, which includes information on items and types of import refusals. The reason for rejection was also analyzed according to the FDA violation codes. The degree of countermeasure for import refusals was identified by measuring the unit rejection rate (URR). The results of the analysis showed that the major U.S. import refusals for the Korean healthcare and life sciences industry had expanded from contact lenses to COVID-19 diagnostic kits and drugs after the pandemic broke out. The major reasons for import refusals were non-compliance with the Predicate Device and Drugs Act and non-approval by the FDA for products and facilities. On the other hand, the unit rejection rate (URR) of major items in the Korean healthcare and life sciences industry was measured higher than the industry average. The results therefore showed a low level of response to U.S. import refusals. The results of the analysis of reasons for import refusals by item according to FDA violation codes were as follows. First of all, the main violation for contact lenses and COVID-19 diagnostic kits corresponded to misbranding. This was often due to the fact that Korean companies did not provide the relevant notices and information required by the FDA. Many cases also failed to demonstrate a substantial equivalency compared to predicate devices already on the market. On the other hand, applications for new unapproved drugs were not accepted as they had yet to pass relevant regulations that would prove their safety and efficacy. In conclusion, import refusals for the Korean healthcare and life sciences industry were found to be closely related to technical barriers to trade (TBT).