• Proceedings of the Korean Society of Dyers and Finishers Conference
• /
• 2009.03a
• /
• pp.116-117
• /
• 2009

In this study, As a previous stage to manufacture disposable tent for military camouflage, we examine possibility of inorganic material absorption on PET surface. In order to, we created unevenness by sputtering process on PET surface and made absorption with Zirconium (ZIA) that has nano particles. and we went on study to its effect.

• Digital Contents
• /
• no.11 s.126
• /
• pp.54-57
• /
• 2003

정부의 정부문서관리법령 개정으로 최근 각 지방자치 단체와 정부 공공기관은 전자문서 시스템 도입 준비에 안창이다. 내년 1월 이후에는 그간 중앙행정기관에서 개발적으로 유통되던 전자문서를 정부전자문서유통센터를 통해 관리함으로써 정부문서처리 전 과정을 전산화, 자동화 하기로 했기 때문이다. 기존의 종이 문서를 전자문서로 변환해 관리하기 위한 노력은 그 동안 각 기업별 또는 기관별로 꾸준히 진행돼 왔다. 특히 인터넷을 통한 각종 정보 서비스의 제공을 위해서는 전자문서 구축은 필수다. 그렇다면 남은 문제는 얼마나 우수한 시스템을 얼마나 비용 효율적으로 구축하는 가의 문제이다. 어도비시스템즈의 PDF솔루션을 통해 전자문서 시스템을 구축하고, 이를 통해 비용절감과 함께 서비스 만족도 향상등 두 가지 토끼를 한번에 해결한 사례를 살펴봤다

• Journal of the Chungcheong Mathematical Society
• /
• v.25 no.1
• /
• pp.35-42
• /
• 2012

In this paper we first introduce a Carleson inequality and study the generalized form of Carleson inequality in the context of spaces of homogeneous type. The previous inequality is known to play important roles in harmonic analysis.

• Journal of the Korean Ceramic Society
• /
• v.35 no.8
• /
• pp.878-884
• /
• 1998

Synthesis of high purity mullite from korean resourceful kaolin and water-soluble aluminium salts was in-vestigated by addition of mullite seed. Single phase of mullite was formed at 1350$^{\circ}C$ however its mullite con-tent was 31-33% Maximum content of mullite synthesized from kaoin aluminium nitrate and 8wt% mul-lite seed was 98% at 1600$^{\circ}C$ for 4 hours.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.34 no.5
• /
• pp.70-76
• /
• 2002

Ten years ago most papermakers were convinced that a system needs to be voluminous and heavy for controllability and stability. In order to improve grade changing dynamics, the author of this paper began developing a compact papermachine wet end. The results have proven that compactness is beneficial even more broadly. Quoting Voith$^1$the trend is now the opposite - the systematic collecting and direct feeding of the individual water flows back into the system". In its gasless form this is actually covered by a POM Technology Patent.tent.

• Honam Mathematical Journal
• /
• v.42 no.4
• /
• pp.681-699
• /
• 2020

In this paper, topological entropy of iterated function systems (IFS) on one dimensional spaces is considered. Estimation of an upper bound of topological entropy of piecewise monotone IFS is obtained by open covers. Then, we provide a way to calculate topological entropy of piecewise monotone IFS. In the following, some examples are given to illustrate our theoretical results. Finally, we have a discussion about the possible applications of these examples in various sciences.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.10 no.5
• /
• pp.565-570
• /
• 2015

Spread spectrum communications have increased interest due to their immunity to channel fading and low probability of intercept. One of the limitations of the traditional digital spread spectrum systems is the need for spreading code synchronization. Chaotic communication is the analogue alternative of digital spread spectrum systems beside some extra features like simple transceiver structures. In this paper, This paper was used instead of the digital modulation and demodulation carriers for use in the chaotic signal in a digital communication system among the chaotic modulation schemes, the Differential Chaos Shift Keying(DCSK) is the most efficient one because its demodulator detects the data without the need to chaotic signal phase recovery. Also Implementation of Differential Chaos Shift Keying Communication System Using Matlab/Simulink and the receiver con decode the binary information sent by the transmitter, performance curves of DCSK are given in terms of bit-error probability versus signal to noise ratio with spreading factor as a parameter and we compare it to BPSK modulation.

• Microbiology and Biotechnology Letters
• /
• v.16 no.3
• /
• pp.175-181
• /
• 1988

To produce L-lysine from cellulosic substrate, the intergeneric protoplast fusion between Cellulomonas flavigena and Corynebacterium glutamicum, Cellulomonas flavigena and Brevibacterium flavum was performed. The fusion frequencies were 1.9$\times$10$^{-6}$ to 2.1$\times$10$^{-6}$ for the regenerated protoplasts when two parental strains were treated with 30% of polyethyleneglycol (M.W.6000) containing 5 mM EDTA at 3$0^{\circ}C$ for 30 min. Two fusants, FCB3 and FCC 19 were finally selected by comparision of their genetic stability and L-lysine productivity. The properties of fusants-DNA con-tent, G＋C content and L-lysine productivity-were investigated. The DNA content of fusants was greater than those of the parental strain and their G＋C contents are equal to half of total G＋C con-tent of two parental strains. The fusants showed high productivity of L-lysine from carboxy methyl cellulose as substrate.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.38A no.6
• /
• pp.479-485
• /
• 2013

Recently, interest for wireless communication technology with improved security and low eavesdropping probability is increasing rapidly recognizing that information security is an important. Chaos signal can be used encode information efficiently due to irregular phenomena. Chaotic signal is very sensitive to the initial condition. Chaos signal is difficult to detect the signal if you do not know the initial conditions. Also, chaotic signal has robustness to multipath interference. In this paper, we evaluate the performance of correlation delay shift keying (CDSK) modulation with different chaotic map such as Tent map, Logistic map, Henon map, and Bernoulli shift map. Also, we analyze the BER performance depending on the selection of spreading factor (SF) in CDSK. Through the theoretical analyses and simulations, it is confirmed that Henon map has better BER performance than the other three chaotic maps when spreading factor is 70.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
• /
• v.24 no.4
• /
• pp.417-425
• /
• 2013

Digital communication technology have been focused on the higher data efficiency and the effective coding of information. Also, it is very important to improve security and minimize the interference of the external sources, Chaos communications system is studied to improve security and minimize the interference by effective encoding of information in the nonlinear systems such as DCSK(Differential Chaos Shift Keying) and CDSK(Correlation Delay Shift Keying). In this paper, we evaluate anti-jamming performance of chaos communications system using the DCSK and CDSK system. The simulation results show that the Gauss iterated map has better BER performance than the other maps(tent map, logistic map, Henon map). Also, DCSK and CDSK system can get the better anti-jamming performance by applying different chaotic maps.