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햅틱 인지 요인 분석을 적용한 진동 촉감 인터페이스 설계 프로세스 제안
허용해,김승희,Heo, Yong-Hae,Kim, Seung-Hee 한국인터넷방송통신학회 2021 한국인터넷방송통신학회 논문지 Vol.21 No.5
본 연구에서는 인간의 촉감 메커니즘을 반영하여 햅틱 인지 요인을 적용할 수 있는 진동 촉감 인터페이스 설계 프로세스를 제안하였다. 본 프로세스는 총 4단계로 햅틱 감각의 요구사항 분석 단계, 햅틱 요소 분석 단계, 햅틱 인지 요인분석 단계, 햅틱 요구사항 상세 설계 및 시제품 구현 단계로 구성된다. 본 설계 프로세스의 장점은 햅틱 인지 요인 분석을 적용함으로써 사용자 요구사항 도출 및 구현 시 불필요한 작업들을 배제할 수 있으며, 가장 큰 특징은 인체공학적 특징을 설계에 반영할 수 있고, 사용자 평가와 사용성 테스트, 햅틱 기능 최적화 작업을 동시에 수행함으로써 시제품 개발이 완료됨과 동시에 햅틱 요구사항 명세서가 완료된다는 것이다. 본 설계 프로세스는 사용자의 요구사항에서부터 햅틱 기능 상세설계 및 시제품 구현에 대한 전체 단계를 포함하고 있어 햅틱에 대한 전문 지식이 부족한 일반 개발자들도 사용자 중심의 설계가 가능하여 일정 수준 이상의 햅틱 기능 설계 및 구현을 가능케 할 것으로 기대된다. This study suggests a design process for vibrotactile interface that can apply haptic perception factors reflecting human tactile mechanisms. This process consists of 4 stages: the haptic sense requirement analysis stage, the haptic element analysis stage, the haptic perception factor analysis stage, the haptic requirement detailed design, and the prototype implementation stage. The advantage of this design process is that unnecessary tasks can be excluded in deriving and implementing user requirements, by applying haptic perception factor analysis, and the biggest feature is that research results on ergonomic mechanisms can be reflected in the haptic design, completes prototype development simultaneously while determining the haptic requirements statement by performing user evaluation, usability testing, and haptic feature optimization tasks simultaneously. This design process includes all stages from user requirements to haptic function detailed design and prototype implementation, so it is expected that general developers who lack expertise in haptic will also be able to design user-centered designs, enabling design and implementation of haptic functions at a certain level.
펄프 종류와 기계적 처리조건에 의한 셀룰로오스 나노섬유의 특성 및 탈수성 평가
이지영(Ji Young Lee),박태웅(Tae Ung Park),김은혜(Eun Hea Kim),조해민(Hae Min Jo),김철환(Chul Hwan Kim),김태영(Tae Young Kim),허용대(Yong Dae Heo),이종현(Jong Hyun Lee),김준규(Jun Kyu Kim) 한국펄프·종이공학회 2017 펄프.종이技術 Vol.49 No.3
Many studies have shown that cellulose nanofibrils (CNFs) are powerful in improving paper strength. However, CNFs are usually manufactured as a slurry and their drainage is critical to their internal addition in the papermaking process. Therefore, the production conditions of CNF for internal addition must be established in order for its use to spread in the paper industry. In this study, various CNFs were made in a laboratory according to the functions of pulp type, freeness, and the pass number of grinding. The viscosity, average particle size, zeta-potential, and the fiber width of the CNFs were measured. After the physical properties of the CNFs were measured, the drainage rates of the CNF slurries were determined through the use of a pressure dehydration tester. An increased pass number of grinding simultaneously increased the viscosity of the CNFs and decreased their particle size and fiber widths. However, the relationship between the pass number and the zeta-potential of the CNFs was not observed. As the pass number of grinding increased, the drainage rates of the CNFs decreased linearly. Specifically, the decrease in the drainage of the CNFs made from SwBKP was lower than those made from HwBKP. Therefore, the pulp type and the pass number of the CNFs should be controlled for the purpose of their internal addition in the papermaking process.