• Korean Journal of Remote Sensing
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• v.36 no.5_4
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• pp.1179-1194
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• 2020

This study investigates the feasibility of three algorithms, K-Nearest Neighbors (K-NN), Random Forest (RF) and Neural Network (NN), for estimating the air temperature of an unobserved area where the weather station is not installed. The satellite image were obtained from Landsat-8 and MODIS Aqua/Terra acquired in 2019, and the meteorological ground weather data were from AWS/ASOS data of Korea Meteorological Administration and Korea Forest Service. In addition, in order to improve the estimation accuracy, a digital surface model, solar radiation, aspect and slope were used. The accuracy assessment of machine learning methods was performed by calculating the statistics of R² (determination coefficient) and Root Mean Square Error (RMSE) through 10-fold cross-validation and the estimated values were compared for each target area. As a result, the neural network algorithm showed the most stable result among the three algorithms with R² = 0.805 and RMSE = 0.508. The neural network algorithm was applied to each data set on Landsat imagery scene. It was possible to generate an mean air temperature map from June to September 2019 and confirmed that detailed air temperature information could be estimated. The result is expected to be utilized for national disaster safety management such as heat wave response policies and heat island mitigation research.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.5
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• pp.1045-1051
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• 2005

We developed an orofacial pains diagnosis/therapy system which can enlarge a therapy effect through a new stimulation. Contrary to its established method, this therapy system(DDTS-1) is a treating method which absorbs a surplus ion charge- the cause of an outbreak of a pain-of the human body using a capacitor. Absorbing a surplus ion charge of the human body with effect, it obtained optimal parameters which is control signal to control charging/discharging a capacitor to be 6Hz, and capacitance to be $0.1\~0.33{\mu}F.$ Through clinical demonstration, experimented on among patients-namely dental pain patients, joint disorders patients, and trigeminal neuralgia patients to verification of system. In result, an EAST stimulater had a very low change of abnormal potential against normal potential before/after being placed under medical care. DDTS-1 showed obvious differences that two potentials are one and the same potential or one potential is similar to the other one. DDTS-1 comparing with EAST showed the remedial value of the comparative advantage in all the medical treatment of pains. Therefore, stimulation of DDTS-1 is more effective than the existing electric stimulation. We verified its validity of ion charge absorption in the human body using capacitor which presented the present thesis. That is, we verified theoretical adequacy of control action in a pain, and its efficiency as well as confidence.

• Journal of KIISE:Information Networking
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• v.32 no.3
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• pp.370-381
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• 2005

Mobile IP provides an efficient and scalable mechanism for host mobility within the Internet. Using Mobile If, mobile nodes may change their point of attachment to the Internet without changing their If address. However, it would result in a high signaling cost. To reduce the signaling cost, we factor in the fact that mobile users will not be actively communicating much of the time. In fact, there Is no necessity to send a binding update message to the home agent when an mobile node does not communicates with others while moving. From this point of view, we propose a lazy update strategy for minimizing signaling cost using the forwarding pointer in hierarchical Mobile IPv6. In our proposal, binding updates are sent only when a mobile node is in a busy mode. If an mobile node is in a dormant mode, binding update messages are delayed until busy mode using the forwarding pointer. As a result, our proposal can reduce the total signaling cost by eliminating unnecessary binding update messages when a mobile node Is in a dormant mode. In addition to, our proposal reduces unnecessary location update cost resulting from ping-pong effect under mobile node's dormant mode. Analysis results using the discrete analytic model presented in this paper shows that our proposal can has superior performance than hierarchical Mobile nv6 when the call-to-mobility ratio is low and the length of the forwarding pointer chain K is low.

• Journal of Korean Home Economics Education Association
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• v.15 no.4
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• pp.37-53
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• 2003

이 연구는 고등학교 $\ulcorner$기술ㆍ가정$\lrcorner$주거 공간 꾸미기 단원의 교수-학습을 위한 WBI 프로그램을 개발하고 평가하는 데 목적이 있다. 이 연구는 WBI 프로그램을 개발하여 주거 공간 꾸미기 단원의 교과 내용을 학습하고 HOME DESIGN 응용 프로그램을 이용하여 실습함으로써 제 7차 교육과정에서 강조하는 웹 기반 수업과 개별학습을 하는 데 활용될 수 있을 것이다. 프로그램은 ADDIE 모형을 중심으로 학습 내용 선정, WBI 프로그램 설계, WBI 프로그램 개발 수업 적용, 평가 과정을 거쳐 개발하였다. 우선 $\ulcorner$기술ㆍ가정$\lrcorner$6개 교과서의 주거 공간 꾸미기 내용을 정리하고 그 내용을 바탕으로 HTML과 PHP, MySQL로 데이터베이스를 구축하여 학습자와 컴퓨터와의 역동적인 상호 작용이 이루어지도록 설계하였다. 또한 온라인의 개별 학습이 가능하도록 주메뉴를 교과서 연구실, 3D 홈 디자인 실습실, 자료 공유실, 종합 평가실의 네 부분으로 구성하여 이론을 약 6시간 동안 학습하고 나서 3시간 동안 실습을 할 수 있도록 하였다. 개발된 프로그램을 수정 보완하고 프로그램의 질을 높이기 위한 목적으로 청주시 C고등학교 1학년 학생 35명과 가정과 교사 3명을 대상으로 시범 적용한 결과를 바탕으로 프로그램의 작동 여부를 화인하고 오류를 고쳐 프로그램의 문제점을 개선하였다. 본 프로그램을 이용한 회원은 4월 20일부터 6월 1일까지 2개 고등학교 학생 70명, 11개 고등학교 교사 11명이었다. 평가 결과 교사들은 본 프로그램에서 가장 유용하게 이용한 부분으로 ‘3D 홈 디자인 실습실(63.6%)’, ‘교과서 연구실(18.2%)’, ‘게시판. 자료실, 묻고 답하기 등(18.2%)’ 순으로 답한 반면 학생들은 ‘3D 홈 디자인 실습실(47.8%)’, ‘교과서 연구실(34.3%)’, ‘게시판, 자료실, 묻고 답하기 등(17.9%)’의 순으로 답하여 유용한 부분에 대한 순서는 일치하나 비율에 차이가 있어 교사들이 ‘3D 홈 디자인 실습실(63.6%)’을 더 유용하게 이용했음을 알 수 있었다. 또한 프로그램을 사용하는 데 있어 교사는 ‘쉬운 편이다’라는 응답이 63.6%로 학생의 24.2% 응답과 차이가 있었으며, 제시된 학습 내용의 양이 ‘적당하다’에 교사가 63.6%, 학생이 48.4%로 답하여 차이가 있었다. 그리고 교사들은 화면 구성이 ‘잘 구성된 편이다(72.7%)’,‘평상시 수업보다 이해에 도움이 되었다(81.2%)’로 답하여 교사들이 학생들보다 본 프로그램에 더 긍정적인 반응을 보였음을 알 수 있었다. 프로그램에 대한 장점과 개선할 점에 대한 개방형 평가는 교사들의 평가와 유사하여 ‘재미있어서 시간이 부족했다’, ‘잘하지는 않았지만, 직접 디자인해서 재미있었다’, ‘어른이 되면 주거 공간 활용을 잘 할 것 같다’, ‘새로운 경험이라 재미있었다’, ‘흥미롭고 재미있었다’, ‘쉽게 되어 있어 좋다’, ‘가구 배치가 잘 되었고. 흠 디자인한 색상이 잘 맞는다’라는 의견이었다. 그러나 주거 공간 꾸미기 WBI 프로그램을 이용한 수업이 컴퓨터에 대한 소양이 부족한 학생과 집중력이 떨어지는 학생에게는 다소 어려움이 있으므로 학생들의 개인차와 학교 실정에 따른 시간 배당 등을 고려하여 학생의 개별학습과 아울러 학교에서 교사의 설명과 함께 수업 시간에 활용할 것을 제안한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1209-1216
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• 2010

It has increased that peripheral disturbance(blood flow, nerve, Raynaud's phenomenon) and finger rheumatoid arthritis which is caused by the diabetic complications. To improve these pain issues, we proposed new method for the Finger Disease Therapy(FDT). In this paper, we manufactured solenoid cylindrical coil which was only for the FDT using a variable micro-electromagnetic. Also, we designed the Finger Disease Therapy System(FDTS) which could select three stimulation modes(N_pulse, S_pulse, N/S_pulse) and frequency(0.25hz, 0.5hz, 1hz). We used a Teslameter to measure magnetic flux inner solenoid, and measured magnetic flux as distance(0 ~ 3cm) inner solenoid with stimulation modes and frequency. In the results, magnetic flux was the highest in center of solenoid(0cm) for all stimulation modes. Also, the highest magnetic flux was measured as N_pulse(294.3mT), S_pulse(293.8mT) in 1Hz and N/S_pulse (275.4mT) in 0.25Hz, respectively. Therefore, we developed the FDTS using various pattern and intensity for finger diseases therapy, and checked therapy clinic application possibility of the FDTS as measuring magnetic flux inner solenoid.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.7
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• pp.1399-1410
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• 2009

It is a method to treat pain using medication, neurotomy, and surgery. And acupuncture, ultrasound, electric treatment, and magnetic treatment are applied as a alternative physiotherapy. Electronic therapy is useful but it can be affected by impedance of skin or subcutaneous tissue. So, percutaneous stimulation is leading therapy, that is very randomly. We developed the system which can stimulate parts of acupuncture point noninvasively using the focused magnetic field. And we designed the magnetic stimulation electrode which is considered efficiency of the magnetic stimulation. It can make similar stimulation with manual acupuncture. To confirm the availability and reliability we compared Meridian Electronic Potential(MEP) change between manual acupuncture and magnetic stimulation. From this result, we found out the MEP changes of manual acupuncture and magnetic stimulation were similar. And there were various response properties as changes of stimulation method, intensity, and frequency. Also, the MEP change can be induced by electromagnetic stimulation. We confirmed that it is possible to use electromagnetic stimulation as a acupoint stimulation or pain treatment instrument.

• Korean Journal of Poultry Science
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• v.32 no.1
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• pp.29-34
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• 2005

This study was conducted to estimate the effects of genotype for chicken major histocompatibility complex (MHC) B-LB genes on economic traits. To detect polymorphism, 400 bp fragments of MHC B-LB genes were obtained and sequenced. After digestions using restriction enzyme Hea III, two restriction enzyme sites were observed. There were two mutations at position 427 and 651 those were decided as Type I and Type II, respectively. Using RFLP analyses, type I were genotyped to TT, TC and CC, and type II to MM, Mm and mm. The relatively higher TC genotype frequencies (0.8) of Type I and Mm genotype frequencies (0.88) of Type II were observed in Korean native chickens. The effects of the genotype on 150 days body weight trait were investigated by the associations of CC and Mm genotypes (P<0.05) in Korean native chickens. This result suggests that a significant association exists between the SNP and 150 days body weight.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.11a
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• pp.74-78
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• 2009

인터랙티브 TV 시장이 활성화됨에 따라 DCATV와 IPTV의 경쟁이 본격화되면서 사용성에 직접적인 영향을 주는 인터페이스에 대한 관심도 증대되고 있는 실정이다. 본 연구는 인터랙티브 TV의 서비스 및 인터페이스에 대한 사용자의 멘탈모델을 이해하는 것을 목적으로 진행하였다. 연구 방법은 다음과 같다. 첫째, 문헌 조사를 통해 인터랙티브 TV의 2가지 유형인 DCATV와 IPTV의 기술적 차이점과 서비스 동향을 파악하였다. 둘째, 헬로우TV, C&M, 브로드앤TV, 쿡TV, 마이 엘지TV 등 인터랙티브 TV의 사례들을 비교분석 하였다. 셋째, 헬로우TV를 중심으로 사용성 평가를 실시하고 그 결과를 종합 분석하였다. 이를 통해 본 연구에서는 DCATV와 IPTV의 서비스 및 인터페이스에 대한 사용자 멘탈모델이 다르다는 것을 파악할 수 있었다. 특히 실시간으로 방송되는 '케이블TV채널'과 요청에 따라 다운로드 되는 'VOD'라는 두 가지 서비스는 인터랙션 방식과 제공 단위에 있어서 상이하며, 따라서 개념적 혼란을 야기할 수 있다. IPTV와 달리 두 가지 서비스를 함께 제공하는 DCATV에서는 대부분의 사용자들은 2가지의 멘탈모델을 병립시키지 못해 인지적 혼란을 느꼈고 VOD서비스에 대해서도 정확히 이해하지 못했다. 이는 VOD 명칭에 대해 어려움을 느끼는 것으로 생각되며 VOD명칭에 대한 개선이 필요했다. 이에 새롭게 변화된 쿡TV에서는 VOD란 명칭을 TV다시보기로 개선함으로써 명칭 개선이 필요함을 증명했다. 이러한 발견 점은 차후 인터랙티브 TV의 인터페이스 개발시 컨셉 개발을 위한 기초 자료로 이용될 수 있을 것으로 사료된다.

• The KIPS Transactions:PartD
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• v.12D no.6 s.102
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• pp.905-914
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• 2005

This paper suggests a healthcare home service system based on the distributed object group framework that can not only provide healthcare application services using the information obtained from the physical healthcare sensors and devices, and but also monitor and control these services remotely. The distributed object group framework supports the object group service, the interaction service between object groups and the real-time service in order to execute the healthcare application. Here object group means the unit of logical grouped objects or healthcare sensors and devices for a service. Our suggested system consists of 3 layers. The first layer presents the physical sensors and devices for healthcare, as a physical layer. The second layer lays the distributed object group framework, and the third layer, the upper's one, implements healthcare applications based on lower layers. With healthcare applications providing for this system, we implemented the location tracking service, the health information service and the titrating environment service. Also the integrated executing results of these services can be monitored and controlled via remote desktop systems or PDAs.

• Journal of the Korea Concrete Institute
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• v.24 no.4
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• pp.491-498
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• 2012

This study examines setting shrinkage, coefficient of thermal expansion, and elastic modulus of unsaturated polyester( UP)-methyl methacrylate(MMA) polymer concrete, which is generally used for repair of portland cement concrete pavement and manufacturing of precast products. In this study, a series of laboratory test were conducted with variables such as UP-MMA ratio, shrinkage reducing agent (SRA) content, and test temperature. The results showed that the setting shrinkage ranged from 29.2 to $82.6{\times}10^{-4}$, which was significantly affected by test temperature. Moreover, the findings revealed that the coefficient of thermal expansion, elastic modulus and ultimate strain of UP-MMA based polymer concrete ranged from 21.6 to $31.2{\times}10^{-6}/^{\circ}C$, 2.8 to $3.3{\times}10^4$ MPa, and 0.00381 to 0.00418, respectively. The results of this study will be used as important data for design and application of UP-MMA based polymer concrete.