• 한국통신학회논문지
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• 제34권12B호
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• pp.1483-1490
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• 2009

직교 주파수 분할 다중(OFDM) 기법은 현재 무선 통신에서 가장 중요한 전송 기술 중 하나로 여겨지고 있다. OFDM은 장애가 심한 무선 환경에서 적응 능력이 뛰어나기 때문에 애드 혹(Ad Hoc), 메시(Mesh) 및 센서 네트워크 환경에 이용되기 적합하다. 그러나, OFDM에서 비트 할당과 관련된 기존 연구는 센서 네트워크에서 요구되는 에너지 효율성 및 낮은 계산 복잡도가 충분히 고려되지 않았다. 본 논문은 주파수 선택적 페이딩 채널(Frequency Selective Fading Channel) 환경 하에서 에너지 제한을 고려하며, 낮은 계산 복잡도를 가지는 비트 할당 기법을 제시한다. 이 기법은 피드백 채널을 이용해 수집한 채널 상태 정보를 이용하여 에너지 제한에 맞는 비트 할당 방법을 찾는 적응적(Adaptive) 방법이다. 시뮬레이션을 통하여 성능을 분석한 결과, 본 기법은 매우 낮은 계산 복잡도를 가지지만 계산 복잡도가 높은 최적화 기법과 성능 차이가 거의 없다는 점을 확인하였다.

• 전자공학회논문지
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• 제53권12호
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• pp.3-12
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• 2016

본 논문은 지뢰탐지용 48채널 배열 UWB 임펄스 레이다 방식의 지면투과레이다 구현과 시험에 대해 기술한다. 지면투과레이더는 기존 금속탐지기의 한계인 비금속 지뢰 탐지의 어려움과 매질 내 금속 성분에 의해 발생하는 높은 오경보 문제점을 극복한다. 본 논문에서는 펄스폭이 600ps 급인 미세한 모노싸이클(Monocycle) 펄스 파형을 사용해, 높은 해상도의 지뢰 전자파 영상을 제공토록 시스템을 구현한다. 특히 신호처리를 통해 지뢰가 매설된 지점을 자동으로 추정하고, 해당 지점에서의 분할된 상세 지뢰 전자파 영상을 사용자에게 제공한다. 기준 성능 분석을 위해 한국 대표 토양인 거친 사양토를 사용한 실내 시험장을 구축하고, 시험장 내의 자동화된 측정 플랫폼에 구현한 레이다를 장착하여 영상 획득 및 탐지심도 분석 등의 시험을 수행한다. 지뢰는 비무장 지대에 매설된 지뢰와 동일한 형태의 모형 지뢰를 사용한다.

• 대한치과기공학회지
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• 제36권2호
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• pp.119-128
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• 2014

Purpose: This study has been carried out to help to enhance the measures of interprofessional collaboration between Dental personnel and dental technicians, and between dental technicians themselves through the analysis of recognition of interprofessional collaboration between dental technicians. Methods: The subjects in this study were 130 dental technicians who were self-written questionnaire. The results were analyzed by SPSS 12.0. The collected data was analyzed by frequency and Correlation. Results: As a result of examining the correlation analysis of each question to explore the factors that affect interprofessional collaboration recognition of dental technicians, the group which received criticism from dental personnel showed negative (-) correlation in the interprofessional collaboration recognition (p<0.05). The following groups showed positive (+) correlations in the recognition of interprofessional collaboration : the group who replied that they can utilize information on the patients associated with the prosthesis production (p<0.01); the group who thinks that they are sharing common goals (P<0.01); and the group who replied that Dental personnel are familiar with patients (p<0.01). The following groups also showed higher positive (+) correlations in the recognition of interprofessional collaboration : the group who replied that they frequently discuss patient's information with Dental personnel (p<0.01); the group who thinks they have mutual confidence in one another (p<0.01); the group who thinks that cooperation among their colleagues in dental technique laboratories are being done well (p<0.01); and the group that has high job satisfaction (p<0.01). Conclusion: Effective communication and team work between human resources for providing medical service of the facility are essential for safe and high-quality medical service to patients. Further, such elements are directly connected to efficiency of the entire team. The reliability between dental technician and Dental personnel for cooperation should not be neglected therefore continuous interests in inter-cooperative partnership is required.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.267-268
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• 2002

Microbeam is a new avenue of radiation research especially in radiation biology and radiation protection. Selective irradiation of an ionizing particle to a targeted cell organelle may disclose such mechanisms as signal transaction among cell organelles and cell-to-cell communication in the processes toward an endpoint observed. Bystander effect, existence of which is clearly evidenced by application of the particle microbeam to biological experiments, suggests potential underestimation in the conventional risk estimation at low particle fluence rates, such as environment of space radiations in ISS (International Space Station). To promote these studies we started the construction of our microbeam facility (named as SPICE) to our HVEE Tandem accelerator (3.4 MeV proton and 5.1 MeV $^4$He$\^$2+/). For our primary goal, "irradiation of single particle to cell organelle within a position resolution of 2 micrometer in a reasonable irradiation time", special features are considered. Usage of a triplet Q magnet for focussing the beam to submicron of size is an outstanding feature compared to facilities of other institutes. Followings are other features: precise position control of cell dish holder, design of the cell dish, data acquisition of microscopic image of a cell organelle (cell nucleus) and data processing, a reliable particle detection, soft and hard wares to integrate all these related data, to control and irradiate exactly determined number of particles to a targeted spot.

• 한국식품영양학회지
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• 제31권5호
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• pp.616-630
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• 2018

This study analyzed the current status of registered patents related to food tech in Korea and Japan. Using the patent information search services of Korean and Japanese Patent Offices, patents registered during the past 10 years from January 1, 2005 to December 31, 2015 were searched with the following key words/phrases: "food or meal or diet" and "program or information system". A total of 669 patents (539 for Korea and 130 for Japan) were finally selected and analyzed. Based on Porter's value chain theory, the patents were categorized into three dimensions related to "manufacturing/processing/distribution", "sales & marketing", and "consumer support". The results showed that in Korea, 41.7% of the total patents were related to sales & marketing followed by consumer support (37.3%) and manufacturing/processing/distribution (21.0%). In Japan, patents related to consumer support accounted for 56.2% followed by manufacturing/processing/distribution (32.3%), and sales & marketing (11.5%). In the area of manufacturing/processing/distribution, "food quality management system" in Korea, and "food manufacturing and processing management system" and "food safety control and hazard analysis system" in Japan tended to show a significantly higher proportion of patents registered (p<.05). Under sales & marketing, patents in the categories of "food purchase and delivery service system" in Korea and "restaurant information sharing system" in Japan tended to be more frequently registered (p<.05). Finally, in the area of consumer support, "kitchen facility and cooking device control system" in Korea and "menu and nutrition management system" in Japan tended to account for a significantly higher proportion of patents registered (p<.001). The results are expected to provide useful insights into the development of new patents and markets for food tech in the future.

• Architectural research
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• 제19권1호
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• pp.13-19
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• 2017

In banquets of royal courts held in the late Joseon Dynasty, a procedure that follows the customs as well as physical components to follow that procedure were necessary. A noticeable trait of the red blinds(朱簾) is that they are seen in the naeyon(內宴) types of banquets, which is mostly centered on the queen dowager and relatives, and they function as a makeshift facility that divide the different banquet spaces according to the hierarchy of the royal family. Furthermore, the red blinds within the court played an important role in the procedure of the banquet along with the incense, as it was drawn upon the queen dowager's appearance to signal the beginning, and folded out again to signal the end. This indicates that they were of higher importance within the banquet space. The red blinds used in the playacting stage of the royal court not only segmented the space, but also upon being taken down, expanded and integrated the banquet hall, thereby maximizing the playacting stage. Once the banquet was finished, the red blinds within the court were once again folded out so as to restore dignity to the space. The red blind is a symbolic item that could open the private space of the court so as to enable communication with the public space, and also close it off to restore privacy. Also, the layout of the banquet space was divided by the red blinds into primary, secondary, and tertiary hierarchal space, according to the status of the royal family and the banquet attendants. In other words, the red blinds played an important role in its the symbolic meaning in the national precedent as well as distinguishing the hierarchy of space within the naeyon banquet in the royal court.

• Asian Pacific Journal of Cancer Prevention
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• 제14권7호
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• pp.4455-4457
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• 2013

In the new millennium people are facing serious challenges in health care, especially with increasing non-communicable diseases (NCD). One of the most common NCDs is cancer which is the leading cause of death in developed countries and in developing countries is the second cause of death after heart diseases. Cancer registry can make possible the analysis, comparison and development of national and international cancer strategies and planning. Information technology has a vital role in quality improvement and facility of cancer registries. With the use of IT, in addition to gaining general benefits such as monitoring rates of cancer incidence and identifying planning priorities we can also gain specific advantages such as collecting information for a lifetime, creating tele medical records, possibility of access to information by patient, patient empowerment, and decreasing medical errors. In spite of the powerful role of IT, we confront various challenges such as general problems, like privacy of the patient, and specific problems, including possibility of violating patients rights through misrepresentation, omission of human relationships, and decrease in face to face communication between doctors and patients. By implementing appropriate strategies, such as identifying authentication levels, controlling approaches, coding data, and considering technical and content standards, we can optimize the use of IT. The aim of this paper is to emphasize the need for identifying positive and negative effects of modern IT on cancer registry in general and specific aspects as an approach to cancer care management.

• 문화기술의 융합
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• 제6권3호
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• pp.267-273
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• 2020

비콘(Beacon)은 근거리에 있는 스마트 기기를 자동으로 인식하여 필요한 데이터를 전송할 수 있는 무선 통신장치이다. 4차 산업혁명 시대에 대표적인 사물인터넷(IoT) 설비로 근거리 정보 전달, 모바일 위치서비스, 쇼핑, 마케팅 등 다양한 분야에 활용되고 끊임없이 진화하고 있다. 본 논문에서는 관광위치 기반 추천 정보 제공 서비스를 바탕으로, 비콘 기술을 접목하여 사용자의 관심 또는, 선호도 등에 따라 맞춤형 정보를 추천하는 시스템을 제안한다. 즉, 관광객인 사용자가 원하는 정보를 알려 주는 정보 대행자의 역할을 한다. 관광객의 니즈를 충족시키기 위해서는 지능형 관광 추천 시스템 구축이 필요하다. 본 논문에서 제안한 비콘 기술을 활용한 개인 맞춤형 한식과 관광지 추천 관리 시스템은 한국을 찾는 외국인뿐 아니라 내국인 관광객들에게 양질의 서비스를 제공할 수 있을 것으로 예상된다.

• International journal of advanced smart convergence
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• 제9권1호
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• pp.154-162
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• 2020

We studies show that ratio of corpse among cremated bodies in public cremation facilities in metropolitan cities using E-Haneul funeral information system is average 90.1%, which is high, in bigger metropolitan cities with over 2 million of population (Incheon, Busan, and Daegu), but is average 81.4%, which is relatively low, in smaller metropolitan cities with less than 2 million of population(Daejeon, Gwangju, and Ulsan). In addition, the cremated bodies ratio of opening remains is average 17.4% in smaller metropolitan cities with less than 2 million of population, but is average 8.9% in those with over 2 million of population, which is relatively low. Finally, the cremated bodies ratio of dead fetuses is average 1.2% in smaller metropolitan cities with less than 2 million of population, and average 1.0% in those with over 2 million of population, which is low. Based on the above result, we are the following suggestions to improve the effectiveness of funeral facility use by the increase of demand for public cremation facilities in metropolitan cities. First, Busan and Daegu, where the shortage of supply is expected due to the increase of demand for cremation of corpse, need to implement supply expansion policy of public cremation facilities to build or expand cremation furnaces. Second, Daejeon, Gwangju, and Ulsan, where the cremated bodies ratio of corpse is low, need to expand supply through expanded operation from existing 4~8 cremation numbers of public cremation facilities to 11 cremation numbers, which is the level of Seoul Metropolitan City. Third, there should be cremation furnaces exclusively for opening remains to prepare the increase of demand for opening remains in the years with leap month.

• 한국컴퓨터정보학회논문지
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• 제19권12호
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• pp.187-196
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• 2014

본 논문에서는 고정된 역간 거리를 정해진 운전 시분내에 주행에너지를 최소화하며 주행하는 열차의 특성을 파악하고 수학적으로 모델링한다. 도시철도차량 자동주행에 일반적으로 사용되는 PID제어기 대신 목표값에 추종하면서도 자동 주행 중 소비에너지가 최소화되도록 최적제어기를 사용하여 철도 차량를 모델링하였으며 실제 동일한 운행조건하에서 설계한다. 실제 선로 조건을 적용하여 별도의 차상장치나 선로주변시설 없이도 자동운전 중 주행에너지를 최소하여 주행에너지를 절감하고자 한다. 따라서 8호선 실 노선 구간별 운전시분 내에서 실측 데이터 분석을 위해 직선구간/구배구간/곡선구간 등 구간을 선정하고 그 구간에서 열차의 운행패턴에 따라 에너지를 절감하는 열차운행을 방법을 제시하였다.