• 대한가정학회지
• /
• 제25권1호
• /
• pp.35-42
• /
• 1987

Since the 1930's, a rapid development of resin processing has contributed to making our clothing life convenient and rich. Wrinkle considered as the largest defect of cellulose fiber is generated from fixation of molecules which are divided by compression or crookedness. It can be protected by building a bridge between the molecules the joint combination of the inside of the fiber. The formaldehyde reactive resin which is used in processing resin is a chemical compound with more than 2 N-methylol or N-alkoxymethylol group and a chemical compound with N-methylol shows the property of W.W and D.P through the very complex bridge-bonding reaction under the OH group of cellulose and acid catalyst. However, if the processing is excessively carried out, resin-processed textile emits the formaldehyde when the bridge bonding agent reacts to amine type under the acid condition or the formaldehyde remains in the condition of non-reaction or the resin combinates by itself, or the methylol group of non-reactive resin is hydrolyzed due to the insufficient themomagnetic treatment.

• 한국방송∙미디어공학회:학술대회논문집
• /
• 한국방송공학회 2009년도 IWAIT
• /
• pp.803-807
• /
• 2009

The bobsleigh is a winter sport which use a sled to slide down an ice-covered course. There is a big expectation for having a training environment and being able to train year round. At present, training is very limited due to the season or course facilities. A variety of VR (Virtual Reality) equipment has been developed in recent years, and it is beginning to spread. We have also made our contribution in bobsleigh simulation. The reactive force applied in our bobsleigh simulation is much smaller than that of a real bobsleigh. This paper proposes a method to enhance reactive force of bobsleigh simulation in real time. The reactive force is magnified instantly in the physically-based simulation. The Laplacian filter is applied to the sequence of reactive force, this technique is often used in the field of image processing. The simulation is comprised of four large scale surround screens and a 6-D.O.F. (Degree Of Freedom) motion system. We also conducted an experiment with several motion patterns to evaluate the effectiveness of enhancement. The experimental results proved useful in some cases.

• 정보처리학회논문지A
• /
• 제13A권6호
• /
• pp.481-488
• /
• 2006

함수형 반응적 프로그래밍(FRP: Functional Reactive Programming)은 하스켈(Haskell)에 내장된 언어로서 두 핵심 고차 타입인 행위(Behavior)와 이벤트(Event)를 기반으로 반응적 시스템을 선언적으로 프로그래밍 한다. 이 논문은 다양한 제약사항을 가진 임비디드 시스템에 FRP를 이용하기 위해 실시간 함수형 반응적 프로그래밍(RT-FRP: Real-time Functional Reactive Programming) 변환기를 설계하고 구현한다. RT-FRP 변환기는 RT-FRP 언어의 기능적 의미론을 기반으로 RT-FRP 프로그램에서 C 프로그램을 생성한다. RT-FRP 변환기의 효과적인 변환을 입증하기 위해, 변환기에서 생성된 테스트 프로그램을 실제 임베디드 시스템, 레고 마인드스톰(LEGO Mindstorm)에 탑재하고 수행하였다. 실험 결과, RT-FRP를 이용할 경우 목적파일의 크기가 조금 증가하였으나 명령형 언어를 이용한 프로그램 보다 간결하게 반응적 시스템 소프트웨어를 프로그래밍 할 수 있었다.

• 한국고분자학회지:고분자과학과기술
• /
• 제9권3호
• /
• pp.193-199
• /
• 1998

• 센서학회지
• /
• 제24권1호
• /
• pp.10-14
• /
• 2015

This paper reports the results of a study on the optimization of the etching profile, which is an important factor in deep-reactive-ion etching (DRIE), i.e., dry etching. Dry etching is the key processing step necessary for the development of the Internet of Things (IoT) and various microelectromechanical sensors (MEMS). Large-area etching (open area > 20%) under a high-frequency (HF) condition with nonoptimized processing parameters results in damage to the etched sidewall. Therefore, in this study, optimization was performed under a low-frequency (LF) condition. The HF method, which is typically used for through-silicon via (TSV) technology, applies a high etch rate and cannot be easily adapted to processes sensitive to sidewall damage. The optimal etching profile was determined by controlling various parameters for the DRIE of a large Si wafer area (open area > 20%). The optimal processing condition was derived after establishing the correlations of etch rate, uniformity, and sidewall damage on a 6-in Si wafer to the parameters of coil power, run pressure, platen power for passivation etching, and $SF_6$ gas flow rate. The processing-parameter-dependent results of the experiments performed for optimization of the etching profile in terms of etch rate, uniformity, and sidewall damage in the case of large Si area etching can be summarized as follows. When LF is applied, the platen power, coil power, and $SF_6$ should be low, whereas the run pressure has little effect on the etching performance. Under the optimal LF condition of 380 Hz, the platen power, coil power, and $SF_6$ were set at 115W, 3500W, and 700 sccm, respectively. In addition, the aforementioned standard recipe was applied as follows: run pressure of 4 Pa, $C_4F_8$ content of 400 sccm, and a gas exchange interval of $SF_6/C_4F_8=2s/3s$.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2001년도 추계학술발표논문집 (상)
• /
• pp.563-566
• /
• 2001

이 논문에서는 이동로봇의 자유로운 배회 및 목적지 찾기 행동을 위한 진화형 퍼지 제어기의 설계 방법을 제안 한다. 전체 실험공간을 장애물과 충돌없이 자유롭게 움직이기 위해서 진화연산 알고리즘을 이용한 퍼지규칙과 소속함수의 자동생성을 거친 뒤 이를 통해 전체 지도정보를 구축한다. 여러 시스템에서 응용되는 퍼지 제어기는 일반적으로 시스템을 잘 이해하고 있는 전문가로부터 구축되어 사용되어진다. 그러나 사람의 지식과 경험은 간혹 알려진 범위 내에서란 완벽하게 작동하기 때문에 그 범위를 벗어나면 오류를 범할 수 있다. 이러한 알려진 해법외의 새로운 규칙과 제어 방법을 찾기 위하여 유전 알고리즘을 이용한 퍼지규칙과 소속함수를 구축하려는 시도가 많이 이루어지고 있다. 이 논문에서도 유전 알고리즘을 이용하여 이동로봇의 퍼지 제어기에 사용된 규칙과 소속함수의 최적화를 통해 견고한 퍼지 제어기를 설계한다. 이를 통해 구축된 지도정보는 로봇의 Deliberative한 행동을 위해 사용되며, Fuzzy-GA 제어기는 센서기반 Reactive 시스템에서 이용된다. 전체 실험환경의 구성부터 제안한 이동로봇 퍼지 제어기 구축과 지도 구축작업을 컴퓨터 시뮬레이션을 통해 검증하였다.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2007년도 춘계학술발표대회
• /
• pp.1205-1208
• /
• 2007

모바일 애드혹 네트워크는 기존의 셀룰러 네트워크와는 달리 고정된 기지국이 존재하지 않고 모바일 노드들만으로 구성된 네트워크이다. 모바일 애드혹 네트워크의 각각의 노드들은 제한된 자원과 한정된 용량을 가진 배터리로 동작한다. 만일 이 배터리를 모두 소모하게 된다면 중간 노드들이 다운이 되고, 결과적으로 전체 네트워크가 단절되는 문제가 발생할 수 있다. 기존의 전송 전력을 고려하여 경로를 설정하는 기법인 CLUSTERPOW는 노드 간에 연결되는 전송 전력을 최소화함으로써 데이터 전송 시 소비되는 전력을 줄이고자 하였다. 그러나 이 기법은 proactive 방식의 라우팅 프로토콜에는 적합하나 reactive 방식의 라우팅 프로토콜에는 적합하지 않다. 따라서 본 논문에서는 reactive 방식의 특성에 맞는 전송 전력 설정 기법인 FSRS(Fast Search Reverse Setting) 기법을 제안하였다. FSRS 기법은 reactive 방식에서 사용하는 컨트롤 패킷 플라딩을 사용한 경로 설정에서의 오버헤드를 줄이고자 클러스터 간 플라딩을 통해 목적지 노드를 빠르게 찾고 한정된 클러스터 간 경로를 통해 전송 전력을 고려한 세부적인 경로를 설정한다. FSRS 기법은 기존의 CLUSTERPOW 기법과 마찬가지로 효율적인 전송 전력으로 경로를 설정하였으며 또한 네트워크 생존 시간을 CLUSTERPOW보다 평균 43% 연장시켰다.

• 한국섬유공학회:학술대회논문집
• /
• 한국섬유공학회 2003년도 The Korea-Japan Joint Symposium
• /
• pp.33-34
• /
• 2003

Lyocell yarns were treated with NaOH, liquid ammonia, high pressure steam and polycarboxylic acids, and dyed with five reactive dyes. The water content of the samples was also measured by the centrifugal and chromatographic techniques. The total pore volume w as substantially increased by NaOH treatment, while decreased by high pressure steaming. The pore size distributions for the dyed samples were affected by the dyes used.

• Journal of Ceramic Processing Research
• /
• 제13권spc2호
• /
• pp.403-406
• /
• 2012

Effect of thickness on ZnO properties including the compositional ratio and crystallinity has been systematically investigated using a variety of characterization tools of x-ray diffraction, field emission scanning electron microscopy, x-ray fluorescence and x-ray photoelectron spectroscopy. Interestingly, it was observed that ZnO films below 80 nm in thickness were in oxygen deficiency, while the oxygen ratio was increased in the films above the thickness, although the compositional ratio of ZnO film was not linearly varied with increasing film thickness. Also, ZnO crystallinity, which is characterized by (002) diffraction pattern, was clearly improved with increasing film thickness. The properties of ZnO film with different sputtering time and the nature of direct current reactive sputtering process were discussed in terms of compositional ratio, especially oxygen ratio in ZnO film.

• 한국축산식품학회지
• /
• 제40권3호
• /
• pp.311-322
• /
• 2020

This study was undertaken to evaluate the impact of Chinese cinnamon powder (w/w), at the levels of 0.5%, 1.5%, and 2.5% and control (without additive) on ground lamb meat quality. The samples were stored at 4℃ and examined for pH, color, lipid oxidation (thiobarbituric acid reactive substances) and total viable counts (TVC). The results demonstrated that pH values were declined with the increase of Chinese cinnamon levels compared to control group. The L* values throughout the storage were significantly higher (p<0.05) in the control group than in other treatment groups, while a* values were decreased with the increase of Chinese cinnamon levels. The addition of Chinese cinnamon powder strongly inhibited (p<0.05) thiobarbituric acid reactive substances (TBARS) and TVC in all treated samples. It can be concluded that Chinese cinnamon powder in lower concentration 0.5% has the ability to maintain the quality of ground lamb in comparison with other treated samples.