• The Journal of Korean Academy of Prosthodontics
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• v.20 no.1
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• pp.19-23
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• 1982

귀금속의 가격 앙등은 치과보철치료에 있어서 비귀금속합금의 이용을 촉진 시키고 있다. 가공의치 제작에 비귀금속합금을 이용할 경우에는 납착상태에 대한 신빙성 문제로 인하여 one-piece cast법이 널리 사용되고 있으나 이에 의하여 제작된 가공의치의 적합도에 관하여는 논의가 분분하다. 고로 저자는 one-piece cast법에 의한 비귀금속 가공의치에 있어서 경화수축에 따른 거리변화를 계측현미경을 이용하여 연구한 결과 다음과 같은 결론을 얻었다. 1. 4개 치아를 포함하는 가공의치 제작에 있어서 Hi-Temp 매몰재는 비귀금속합금(Lite-Cast B)의 수축을 보상하고도 남음이 있다. 2. Hi-Temp에 사용되는 액(液)을 증류수로 희석할 경우 그 농도 조절에 의하여 Hi-Temp 매몰재의 팽창을 크게 변화시킬 수 있다. 3. one-piece cast법에 의한 가공의치 제작의 문제점은 두 지대치의 서로 바라보고 있는 인접면간의 거리는 증가됨이 없이 외측 인접면간의 거리만 다소 증가되어야 한다는 것이다. 4. 비귀금속합금을 이용하여 수직적인 큰 변형없이 4개 치아가 포함되는 가공의치를 제작할 수 있다. 5. 수개 치아를 포함하는 가공의치의 주조 정확도를 계측할 수 있는 새로운 방법을 창안하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.394-397
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• 2018

휴대폰을 개인마다 보유할 정도로 보편화하고 무선 네트워크 기술이 발전하면서 대학가에서 출결관리를 자동화하려는 바람이 불고 있다. 이는 이전의 출결시스템의 결점인 출결 확인 시간을 줄이기 위한 것이다. 그러나 자동화된 스마트 출결시스템에 허점이 많아 출결 정보에 대한 신빙성과 공정성에 문제가 발생하고 있고, 그에 대한 대책이 없는 것이 현재 상황이다. 이번 연구는 얼굴인식을 이용한 스마트 출석 체크 프로그램이다. 수업에서 사진을 찍으면 AWS Recognition 기술을 활용해 얼굴을 인식하여 Django web sever로 보내고 그 얼굴과 학사 시스템에 등록되어있는 학생의 사진을 비교하여 어떤 인물인지 파악한다. 비교한 인물이 일정 유사율을 넘었을 경우 그 학생의 얼굴 사진을 학습, 계속해서 서버 안에 있는 같은 인물 파일에 넣어서 유사율을 높이는 식으로 진행된다. 그렇게 하여 스마트 출결시스템의 목적에 맞게 출결 확인 시간을 대폭 줄일 것이고, 부정적인 방법으로 출석할 수 있는 방법을 없애 기존의 시스템에 없던 신빙성과 공정성을 확립할 것이다. 또한, 어플리케이션을 통해 학생의 경우 언제 어디서든지 자신의 출결 상황을 확인할 수 있고, 교수님 또한 손쉽게 학생들의 출결을 관리할 수 있도록 하였다. 최종적으로 무결성이 확보된 정확한 출결 정보를 자동으로 데이터화하여 이용자와 관리자의 편의를 보장할 것이다.

• Journal of Korean Society of Archives and Records Management
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• v.20 no.3
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• pp.77-97
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• 2020

This study seeks to analyze the concepts of authenticity and reliability of records and apply them to the criteria for judging authoritative records subject to legal management. While reliability is determined by the degree of completeness and control in the records creation stage, authenticity is ensured by preventing manipulation and tampering that occur after records creation. Authoritative records with reliability in the creation stage are legally subject to management, so such records can be subject to punishment if they are destroyed because of negligence. It is necessary to take active measures to ensure reliability, continuous authenticity after creation, and complete records creation by controlled procedures and methods before records capture. The lack of such an evidential characteristic does not mean that it is not a record, and such records are also created in reality, managed in a system, and delivered to the next generation as a representation of social memory and activities.

• Journal of The Korean Association For Science Education
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• v.37 no.1
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• pp.87-101
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• 2017

The analysis was carried out with meta-analysis on master's and doctoral dissertations, and academic journals that analyzed the effects of STEAM education between 2012 and 2015. From the total number of 75 dissertations and articles analyzed, 183 different effect sizes were calculated. The analysis was done to find out the kinds of differences that would be created according to the effect size of creativity, problem-solving ability, and researcher, target area, student division research design type, and level of schools. The total effect size of creativity scored 0.776, and demonstrated satisfaction in symmetry of funnel plot, with no publication biases. The fail-safe N scored 780, and since the number is smaller than 8,945, the results of this research has credibility. Furthermore, problem-solving ability shows intermediate level of effect size with a score of 0.584. It also showed satisfaction in symmetry with funnel plot, with no publication bias. With the different research methods of the sub-factors of creativity, fluency scored the highest with 0.929, flexibility with 0.881, originality with 0.838, sophistication with 0.653, abstractness with title 0.705, and resistance to termination, 0.527. This study finds its significance in the demonstration of average effect size of STEAM education through meta-analysis. According to research results, the effects of inclusive education could be determined, yet the specific effect cause or learning principles were difficult to find. It was found that the effects of STEAM education do not rise or fall depending on school age, and demonstrated differences in creativity according to the research methods or the researchers.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.2
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• pp.175-180
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• 2012

Currently datamining sector is interested and applied in many areas. In other words, datamining is predicting the future to discover hidden correlations and make decisions. To interpret data on various aspects can be converted to real expectation. Analyzing the results even a simple can be found big difference. The properties associated with breast cancer by about applying bayesian theory is used to predict the probability. In the past patient data, doctors may be obtaining by applying evidence-based care for patients with the results of examination and By using the the past patient data.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.6
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• pp.1538-1542
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• 2003

This Study was carried out for proof of confidence of Iris Diagnosis. We analyzed relation between Iris Signs and Chief Complain, and then analyzed relation between Iris Signs and Past History. The rate of relation between Iris Signs and Chief Complain was 72.1 %. The rate of relation between Iris Signs and Past History was 52.9%. synthetically, We had known that this diagnosis method have probability of 79.7%. It was confirmed that there are close correlations between Iris Signs and Chief Complain and between Iris Signs and Past History.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.1
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• pp.53-60
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• 1999

Prior to sea trials, dock trials are usually carried out in order to check the main propulsion system and auxiliaries. At that time the motion of a ship is limited by mooring ropes. In Hyundai Heavy Industries, a simple equation is used to obtain propeller thrust which is used as an input data of mooring analysis. Recently the ship size and the engine power become larger. Therefore a careful analysis of the mooring condition is necessary in order to avoid possible accidents. In this study propeller thrust at deck trials is reviewed and examined through a series of model tests.

• Journal of the Korean Chemical Society
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• v.41 no.3
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• pp.123-129
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• 1997

In order to consider the reduced mass effects on the out-of-plane ring inversion vibration of 1,3-CHD, the vector-based computer program has been written and the kinetic energy expansion function for the large amplitude ring inversion vibration has been calculated using this program. The structural parameters for the calculations have been determined from the ab initio HF/6-31G** calculation. The potential energy function for the out-of-plane ring inversion vibration of 1,3-CHD has been determined from the kinetic energy expansion function and previously reported low-frequency Raman data. The vibrational Hamiltonian calculation including kinetic energy expansion function made it possible to determine the more reliable out-of-plane potential energy function for the ring inversion of 1,3-CHD.

• International Commerce and Information Review
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• v.15 no.2
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• pp.189-206
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• 2013

In this paper, we investigate if the new merchant fee system has problems. The fee was fixed by government policies and there were no processes of listening to market participants. Therefore, we suggest improvements as follows. First, large-sized stores take burdens for the rest of stores so credit card companies and the government should try to minimize the increasing rate for large-sized stores. Second, credit card firms need to give VAN companies roles of stabilizing authorizing processes. Third, periodic update requires because of credibility. Fourth, contents of merchant fee should be disclosed to merchants. Fifth, there needs discussions for merchant fees of debit cards.

• Journal of the Korean Institute of Telematics and Electronics D
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• v.36D no.5
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• pp.54-61
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• 1999

We suggested a macro medel for MOS transistors, which incorporates the distributed substrate resistance by using a method which utilizes external diodes on SPICE MOS model. By fitting the simulated s-parameters to the measures ones, we obtained a model set for the W=200TEX>$\mu\textrm{m}$ and L=0.8TEX>$\mu\textrm{m}$ NMOS transistor, and also analyzed the effects of distributed substrate resistance in the RF range. By comparing the physical parameters calculated from simulated s-parameters such as ac resistances and capacitances with the measured ones, we confirmed the validity of the simulation results. For the frequencies below 10GHz, it seems appropriated to use a simple macro model which utilizes the existing SPICE MOS model with junction diodes, after including one lumped resistor each for gate and substrate nodes.