클라우드 서버 기반 IoT를 이용한 무선기지국 원격 감시시스템 개발

이양원,김철원,Lee, Yang-weon,Kim, Chul-won 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.6

넓은 지역에 광범위하게 분포되어 있는 통신용 무선기지국은 관리에 많은 어려움이 있다. 특히 산간 오지에 있는 무인 통신무선 기지국은 위급한 상황 발생시에 접근에 많은 어려움을 겪고 있다. 대형 통신회사들은 송수신 정보만 원격으로 관리하고 있고 실제 시설 유지를 책임지고 있는 지역 중소기업 협력업체들은 이러한 기술을 보유하고 있지 않아서 일일이 현장 방문을 통하여 확인하고 있는 실정이다. 본 연구에서는 넓은 범위에 산재해 있는 무선기지국내의 온도, 습도, 화염 발생여부, 전원 동작 여부를 실시간으로 모니터링 하여 클라우드 서버에 보내 사무실에서 실시간 모니터링을 통하여 관리하며 위급시 경고 메시지 전송 등이 수행이 가능한 시스템을 클라우드 서버 구축을 통하여 IoT 센서 기술을 이용하여 구현한 내용을 제시하고자 한다. Radio base stations, which are widely distributed across large areas, have many difficulties in managing them. Unmanned radio base stations in remote mountains are having a hard time accessing them in case of emergencies. Major telephone service providers only remotely control incoming and outgoing information and local small business partners responsible for maintaining actual facilities do not possess such technologies, so they are each checked during field visits. In this study, in order to process the sensor raw data and smoothing, we apply the particle filters and confirmed that the performance of sensor data accuracy is increased. Integrated system using temperature, humidity, fire condition, and power operation at a wide range of radio base stations under the real-time monitoring status is operated well. It show that all of the status of base station are monitored at the remote office using the cloud server through internet networking.

물과기름의 상극성을 완화시키는 안정제-유화제

이양원,Lee, Yang-Won 대한제과협회 1996 베이커리 Vol.10 No.-

Particle Filter를 이용한 제스처 인식 연구

이양원,김철원,Lee, Yang-Weon,Kim, Chul-Won 한국정보통신학회 2006 한국정보통신학회논문지 Vol.10 No.11

The recognition of human gestures in image sequences is an important and challenging problem that enables a host of human-computer interaction applications. This paper describes a gesture recognition algorithm based on the particle filters, namely CONDENSATION. The particle filter is more efficient than any other tracking algorithm because the tracking mechanism follows Bayesian estimation rule of conditional probability propagation. We used two models for the evaluation of particle Inter and apply the MATLAB for the preprocessing of the image sequence. But we implement the particle filter using the C++ to get the high speed processing. In the experimental results, it is demonstrated that the proposed algorithm prove to be robust in the cluttered environment. 연속되는 이미지 중에서 인간의 동작을 인식하는 것은 인간과 컴퓨터 의 상호 작용에서 매우 중요하고 도전할 분야이다. 본 논문에서는 CONDENSATION 알고리즘을 이용하여 입자 필터(particle filter)에 기반한 동작 인식 알고리즘을 제안한다. 입자 필터는 조건 확률 전파 모델(Conditional Density Propagation)인 베이시안(Bayesian) 추정 규칙을 적용하는 추적구조를 갖고 있기 때문에 다른 어떤 종류의 추적 알고리즘보다 뛰어난 성능을 보인다. 본 논문에서는 알고리즘의 성능평가를 위해서 두 개의 동작 모델을 가정하였고, 영상에 대한 전처리를 위해서는 MATLAB를 이용하였으며 입자필터는 고속 처리를 위하여 C++로 구현하였다. 두 개의 동작 실험 결과를 통해, 동작 인식 입자 필터가 복잡한 환경 속에서 강인한 추적 성능을 나타냄을 확인하였다.

아메드 방수유출장치 삽입수술의 성공과 관련된 요인

이양원,임진호,이성복,김창식,Yang-Won Lee,M,D,Jin-Ho Yim,M,D,Sung-Bok Lee,M,D,Chang-Sik Kim,M,D 대한안과학회 2005 대한안과학회지 Vol.46 No.9

Purpose: To evaluate the factors associated with the success of Ahmed glaucoma valve implantation in refractory glaucoma. Methods: The medical records of 45 eyes of 45 patients that underwent Ahmed implant surgery for the treatment of refractory glaucoma were reviewed retrospectively. The success criterion was a stable postoperative intraocular pressure (IOP) between 6 and 21 mmHg with or without antiglaucoma medications during the study period. Failure was defined as an abnormal IOP outside of the above range on two consecutive visits, and cases that needed additional surgery to control IOP or to treat devastating surgical complications. We compared the differences in various clinical factors before surgery between the success and failure groups. Results: The Kaplan-Meier cumulative success rate was 71.1% at 12 months. Among the various clinical factors age, gender, right or left eye, phakia or pseudophakia, systemic disease such as diabetes and hypertension, preoperative IOP, preoperative number of antiglaucoma medications, and the number of previous glaucoma or other ocular surgeries were not significantly different between the success and failure groups. Implantation at the superotemporal site and steroid non-responsders of the fellow eye showed a significantly greater success rate than the superonasal site and steroid responders, respectively, after Ahmed glaucoma valve implantation. Conclusions: The efficacy of lowering the IOP of an Ahmed glaucoma valve would be expected to be greater if the patient is a steroid non-responder. Given the same conditions in the superotemporal and superonasal areas, implanting the Ahmed glaucoma valve in the superotemporal quadrant showed an ito increased success rate.

호남대학교 특성화사업 지역산업(스마트가전) 맞춤형 ICT융복합 기술인력 양성사업단

이양원,Lee, Yang-Won 한국공학교육학회 2016 공학교육동향 Vol.23 No.3

Mycobiome and skin diseases

이양원 ( Yang Won Lee ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

Atopic dermatitis and systemic comorbities

이양원 ( Yang Won Lee ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

Onychomycosis in Korea

이양원 ( Yang Won Lee ) 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.2

Analysis of the skin mycobiome in patients with atopic dermatitis

이양원 ( Yang Won Lee ) 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.1

Atopic dermatitis (AD) is known to be the result of dry hypersensitive skin condition, which hinders the protective barrier function of the horney layer. The comprised skin barrier makes the skin readily develop inflammation in response to external stimuli including microorganisms. In terms of fungus, lipophilic yaests of the genes Malassezia has actively been studied. According to previous reports, the colonization level of Malassezia and the composition of Malassezia species are associated with the severity of AD. Most of the studies have been conducted based on traditional culture-dependent methods because genomic methodologies available for fungus have been limited compared with tools for bacteria. The efficiency of culture-dependent methods is, however, prone to vary with the isolation techniques and the culturing conditions. Here, we sequenced skin fungal communities, so-called `mycobiome` of 10 patients with AD and compare with those of 10 healthy controls. Skin swab samples from antecubital fossae of all subjects were obtained. The used phylogenic marker was internal transcribed spacer 2 (ITS2) regions of DNA. Taxonomic identification at various levels, from phylum to species, with alpha diversity analysis revealed more diverse fungal genera in AD samples. Malassezia was the most dominant genus among 680 genera identified in both subject groups. Species-level analysis identified nine different Malassezia species and revealed Malassezia globosa to be the most abundant species except in two AD patients and one healthy control, where Malassezia restricta was dominant. Although interpersonal variation was observed, the diversity assessed by the Shannon diversity index (SDI) indicated that AD samples had more diverse fungal communities than healthy controls at both genus and species level. Although this study was limited by its small number of cases and lack of precise clinical correlation, our data provide useful insights for further investigation.

Sponsored Lecture 3 : Awareness, knowledge, and vaccine acceptability of herpes zoster in Korea: a multicenter survey of 607 patients

이양원 ( Yang Won Lee ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1

Herpes zoster (HZ) infection can significantly impair the quality of life of affected individuals, and its treatment imposes a considerable cost burdens on the healthcare system and on society at large.However, there is little information on the perception of the disease and the acceptability of vaccines in Korea. The aim of this study was to determine the awareness of HZ and its vaccine, and to identify factors associated with acceptability of the HZ vaccine among outpatients of dermatology clinics. A questionnaire-based survey was conducted with 607 outpatients who visited the dermatologic clinics. The responses of the patients revealed a high awareness of HZ (85.4%) but a relatively low knowledge about HZ and its vaccine (42.3%). The HZ vaccination rate among patients aged ≥50 years was 9%. Previous history of HZ infection, being older, and greater knowledge about HZ and its vaccine were associated with higher HZ vaccine acceptability. Of those who had not been vaccinated, 58.3% were interested in receiving the vaccine. The most frequent reason for this interest was “severe sequelae,” followed by “knowing someone who has HZ” and “recommendation from a doctor.” High cost was the most common reason for unwillingness to receive the vaccination. Despite a high awareness of HZ, vaccine acceptability was extremely low among this study cohort. Vaccination acceptability would be improved by encouraging doctors to educate elderly patients about the disease and the availability of vaccination, and the provision of insurance coverage for the HZ vaccination.