• 수산해양교육연구
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• 제27권6호
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• pp.1602-1609
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• 2015

The purpose of this study is to design of prototype for developing webpage of fisheries and marine education especially in the field of Busan area. For this, we extract the guideline for development from literature review, need and task analysis, and advices of subject domain experts. Followings were the results of the research: (a) We make the prototype for main menu and screen based on institute, time, subject, and location. (b) We make the prototype for program approach guide, which is consisted of location based menu constructing prototype guide, activation prototype guide, and selection prototype guide. (c) We make the prototype for functional guide, which is consisted of information section, participation section and other sections.

• 한국지능시스템학회논문지
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• 제21권4호
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• pp.487-492
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• 2011

본 논문에서는 가장 단순한 구조를 가진 Nearest Prototype Classifier의 성능 개선을 위해 차분 진화 알고리즘을 적용하여 prototype의 위치를 결정하는 방법을 제안하였다. 차분 진화 알고리즘을 이용하여 prototype의 위치 벡터가 결정이 되며, 차분 진화 알고리즘에 의해 결정된 prototype의 class label을 결정하기 위한 class label 결정 알고리즘도 제안하였다. 제안된 알고리즘의 성능 평가를 위해 기존의 패턴 분류기와 비교 결과를 보인다.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.184.1-184.1
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• 2008

• 한국지능시스템학회논문지
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• 제24권2호
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• pp.161-165
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• 2014

본 논문에서는 입력 공간의 부분 영역의 특성을 기술하기 위하여 각 부분 영역을 대표하는 prototype을 정의하고 정의된 Prototype 에 가중치를 적용하여 각 부분 영역이 각 클래스의 경계면에 미치는 영향을 차등화 하는 Fuzzy Prototype 분류기를 제안 한다. 제안된 패턴 분류기의 Prototype은 퍼지 클러스터링 알고리즘인 Fuzzy C-Means Clustering 알고리즘을 사용하여 결정한다. 또한, 각 부분 영역의 가중치를 결정하기 위하여 유전자 알고리즘에서 파생된 차분 진화 알고리즘을 적용하여 각각의 퍼지 규칙의 가중치를 최적화 한다. 또한 퍼지 규칙 기반 시스템 기반 패턴 분류기의 경우 각각의 퍼지 규칙의 후반부 구조인 다항식의 계수를 추정하기 위하여 Linear Discriminant Analysis를 사용한다. 마지막으로, 본 논문에서 제안한 패턴 분류기의 패턴 분류 특성 및 성능을 평가하기위하여 기계 학습 데이터를 사용한다.

• 한국산학기술학회논문지
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• 제16권4호
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• pp.2757-2763
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• 2015

p-Snake는 기존의 동적윤곽모델(Active Contour Model)에 원형에너지를 추가로 적용한 에너지 최소화 알고리즘으로 에지 정보가 명확하지 않은 영역에서의 윤곽선 추출을 위해 사용된 방법이다. 본 논문에서는 원과 직선 프리미티브(primitive)의 조합으로 표현되는 가변 원형(prototype)과 퍼지 함수를 적용한 원형에너지장의 생성 기법을 제안하여 p-Snake의 윤곽선 추출 성능을 개선하였다. 제안 방법은 입력된 부품 코드를 기반으로 원형을 정의하고 전처리 과정을 통해 구해진 각 프리미티브 구간에서 대략적인 초기 윤곽을 검출한 후, 프리미티브들이 가변적으로 적응하여 원형을 생성하고 여기에 원형과의 거리에 따른 윤곽 확률을 퍼지 함수를 통해 계산하여 원형에너지 장을 생성하였다. 이를 p-Snake에 적용하여 다양한 소형부품들을 대상으로 준비한 200장의 영상에서 윤곽선을 검출하고, 원형과의 유사도를 비교한 결과 적응 원형을 사용한 p-Snake가 기존의 Snake에 비해 약 4.6% 가량 우수함을 보였다.

• Restorative Dentistry and Endodontics
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• 제46권2호
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• pp.25.1-25.12
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• 2021

Objectives: This study used micro-computed tomography (µCT) to compare voids and interfaces in single-cone obturation among AH Plus, EndoSequence BC, and prototype surface pre-reacted glass ionomer (S-PRG) sealers and to determine the percentage of sealer contact at the dentin and gutta-percha (GP) interfaces. Materials and Methods: Fifteen single-rooted human teeth were shaped using ProTaper NEXT size X5 rotary files using 2.5% NaOCl irrigation. Roots were obturated with a single-cone ProTaper NEXT GP point X5 with AH Plus, EndoSequence BC, or prototype S-PRG sealer (n = 5/group). Results: The volumes of GP, sealer, and voids were measured in the region of 0-2, 2-4, 4-6, and 6-8 mm from the apex, using image analysis of sagittal µCT scans. GP volume percentages were: AH Plus (75.5%), EndoSequence BC (87.3%), and prototype S-PRG (94.4%). Sealer volume percentages were less: AH Plus (14.3%), EndoSequence BC (6.8%), and prototype S-PRG (4.6%). Void percentages were AH Plus (10.1%), EndoSequence BC (5.9%), and prototype S-PRG (1.0%). Dentin-sealer contact ratios of AH Plus, EndoSequence BC, and prototype S-PRG groups were 82.4% ± 6.8%, 71.6% ± 25.3%, and 70.2% ± 9.4%, respectively. GP-sealer contact ratios of AH Plus, EndoSequence BC, and prototype S-PRG groups were 65.6% ± 29.1%, 80.7% ± 25.8%, and 87.0% ± 8.6%, respectively. Conclusions: Prototype S-PRG sealer created a low-void obturation, similar to EndoSequence BC sealer with similar dentin-sealer contact (> 70%) and GP-sealer contact (> 80%). Prototype S-PRG sealer presented comparable filling quality to EndoSequence BC sealer.

• Journal of Biosystems Engineering
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• 제41권4호
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• pp.288-293
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• 2016

Purpose: The purpose of this study was to investigate the key factors in designing a three-wheeled two-row soybean reaper (riding type) that is suitable for soybean production, and ensure worker safety by proposing optimal work conditions for the prototype of the designed machine in relation to the slope of the road. Methods: A three-wheeled two-row soybean reaper (riding type) was designed and its prototype was fabricated based on the local soybean-production approach. This approach was considered to be closely related to the prototype-designing of the cutter and the wheel driving system of the reaper. Load distribution on the wheels of the prototype, its minimum turning radius, static lateral overturning angle, tilt angle during driving, and The working and rear overturning (back flip) angle were measured. Based on the gathered information, investigations were conducted regarding optimal work conditions for the prototype. The investigations took into account driving stability and worker safety. Results: The minimum ground clearance of the prototype was 0.5 m. The blade height of the prototype was adjusted such that the cutter was operated in line with the height of the ridges. The load distribution on the prototype's wheels was found to be 1 (front wheel: F): 1.35 (rear-left wheel: RL): 1.43 (rear-right wheel: RR). With the ratio of load distribution between the RL and RR wheels being 1: 1.05, the left-to-right lateral loads were found to be well-balanced. The minimum turning radius of the prototype was 2.0 m. Such a small turning radius was considered to be beneficial for cutting work on small-scale fields. The sliding of the prototype started at $25^{\circ}$, and its lateral overturning started at $39.3^{\circ}$. Further, the critical slope angle for the worker to drive the prototype in the direction of the contour line on an incline was found to be $12.8^{\circ}$, and the safe angle of slope for the cutting was measured to be less than $6^{\circ}$. The critical angle of slope that allowed for work was found to be $10^{\circ}$, at which point the prototype would overturn backward when given impact forces of 1,060 N on its front wheel. Conclusions: It was determined that farmers using the prototype would be able to work safely in most soybean production areas, provided that they complied with safe working conditions during driving and cutting.

• 한국정밀공학회지
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• 제34권3호
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• pp.205-210
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• 2017

Critical speed analysis was conducted for a active steering bogie prototype, developed to improve the curving performance of railway vehicles. The critical speed for the design concept was about 169.2k m/h. To validate the analysis result, we performed a critical speed test for the prototype bogie using a roller-rig tester. The test results showed that the critical speed for the prototype bogie was about 165 km/h. From the analysis and test results, The critical speed for the prototype bogie was determined to be 165 km/h. Considering the maximum operating speed of the test vehicle is 100 km/h, the prototype bogie is considered stable.

• 한국항해학회지
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• 제24권3호
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• pp.133-140
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• 2000

The paper deals with the implementation of prototype Ship Simulator system (VRSS) by Virtual Reality techniques with Head Mounted Display (HMD) device. The prototype VRSS was consists of PC-based human sensors, object oriented operating system. In addition, two kinds of databases arranged from Head Related Transfer Functions and 3D object models were used to create 3D sea sound, and to construct virtual world, respectively. Using the prototype system, we carried out some simulation tests for the overtaking situation to prevent collisions at sea, and discussed on the usability of the system. As results from simulations, the prototype VRSS can provide multisensory and interactive display environment. The results gave rise to the user interaction with 3D objects that give realistic reproduction of navigational environments under a given scenario. Thus, we found that the prototype VRSS should be one of the next-generation ship simulation system.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2007년도 춘계학술대회 및 국제감성 심포지엄
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• pp.172-175
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• 2007

본 연구는 인터페이스 연구에 이용되는 가상 프로토타입에 대한 인터페이스가 실제크기모형(mockup)과 가까운 실제 프로토타입(real prototype)에 대한 인터페이스와 차이를 분석하고자 하였다. 휴대폰 중심으로 프로토타입을 가상의 그래픽을 구축하고 임베디드 시스템(embedded system)을 이용한 실제 프로토타입(real prototype)을 구축하였다. 휴대품에 대한 감성 평가 모델을 구축하여 두 프로토타입에 대한 평가를 실시하였다. 두 프로토타입의 인터페이스 면에서의 차이는 인터페이스 디자인에 적용되는 제품 평가에 가이드라인을 제시할 것이다.