• Journal of the Chungcheong Mathematical Society
• /
• v.16 no.1
• /
• pp.7-14
• /
• 2003

Let $P_c(z)=z^n+c$ be a complex polynomial with an integer $n{\geq}2$. We derive a criterion that the critical orbit of $P_c$ escapes to infinity and investigate its applications to the degree-n bifurcation set. The intersection of the degree-n bifurcation set with the real line as well as with a typical symmetric axis is explicitly written as a function of n. A well-defined escape-time algorithm is also included for the improved construction of the degree-n bifurcation set.

• Journal of applied mathematics & informatics
• /
• v.8 no.2
• /
• pp.635-640
• /
• 2001

Let X be a T-admissible space and A(x) be the set of all admissible fibers at x∈X. In this paper, we introduce some basic concepts, properties, and known results about set-valued maps, hyperspaces and especially T-admissible spaces. And then, we construct a certain set-valued map(Theorem 2.3) and an arc from {x} to X∈A(x) in use of the set-valued maps(Theorem 2.3 through Theorem 2.7).

• The Pure and Applied Mathematics
• /
• v.23 no.4
• /
• pp.377-383
• /
• 2016

The set of priors in the representation of coherent risk measure is expressed in terms of quantile function and increasing concave function. We show that the set of prior, $\mathcal{Q}_c$ in (1.2) is equal to the set of $\mathcal{Q}_m$ in (1.6), as maximal representing set $\mathcal{Q}_{max}$ defined in (1.7).

• Journal of Korea Multimedia Society
• /
• v.18 no.7
• /
• pp.827-833
• /
• 2015

In this paper, we have compared three level set-based active contour (LSAC) methods on inhomogeneous MR image segmentation which is known as an important role of brain diseases to diagnosis and treatment in early. MR image is often occurred a problem with similar intensities and weak boundaries which have been causing many segmentation methods. However, LSAC method could be able to segment the targets such as the level set based on the local image fitting energy, the local binary fitting energy, and local Gaussian distribution fitting energy. Our implemented and tested the subcortical image segmentations were the corpus callosum and hippocampus and finally demonstrated their effectiveness. Consequently, the level set based on local Gaussian distribution fitting energy has obtained the best model to accurate and robust for the subcortical image segmentation.

• Journal of applied mathematics & informatics
• /
• v.7 no.3
• /
• pp.1029-1038
• /
• 2000

In this paper, we show that if x is a positively Lyapunov stable point of an expansive homeomorphism with the pseudo-orbit-tracing-property, then x is a periodic point or its positive limit set consists of only one periodic orbit, and their periods are predictable. We give a necessary and sufficient condition that a basic set is to be a sink or source. Also, we consider some dynamical properties of basic sets.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.45 no.5
• /
• pp.1-13
• /
• 2013

This study found fit optimum C, M, Y, K solid density and $CIEL^*a^*b^*$ value to paper & ink as well as check about printing machine state for color management in H-UV waterless off-set printing first. These values applied to GRACoL G7 calibration method. This method is one of color standard management method of printing. GRACoL G7 calibration method is possible stable tone reappearance by controlling gray balance by NPDC(Natural Printing Density Curve). Also, this study used values to make device profile as result that is gotten by application of GRACoL G7 calibration method. This profile was applied to CMS(Color Management System) of H-UV waterless off-set printing, and the result was possible by color management that correspond in printing quality standard of ISO 12647-2 and GRACol 2006 specifications.

• Journal of applied mathematics & informatics
• /
• v.7 no.1
• /
• pp.335-346
• /
• 2000

This paper discusses the relation of fuzzy sets satisfying some types of fuzzy covering properties. We give some characterizations of such fuzzy sets and investigate a few properties.

• Journal of Digital Convergence
• /
• v.12 no.7
• /
• pp.285-290
• /
• 2014

In these days the patient can be easy to see the treatment results at home without going directly to hospital. Despite the many advantages that the patient is got optimum service timely, the currently used personal healthcare devices have no compatibility because the manufacturer use the proprietary software and hardware protocols. For these issues, standardization is required between the set-top box and the individual healthcare devices. In this paper, we designed the healthcare set-top box possible to biometric data transmission by using a standard IEEE P11073 between the device and the set-top box. Because the set-top box using IEEE P11073 standardization can transfer data independently, we are expected to make it contribute significantly to the healthcare business.

• Journal of The Korean Society of Grassland and Forage Science
• /
• v.4 no.3
• /
• pp.180-186
• /
• 1984

From June, 1980 to October, 1982, this study was carried out to find an optimal grazing system on the timothy and orchardgrass-dominated pasture. Five different systems consisted of set stocking, modified set stocking, rotational grazing, 'wye college' system and zero grazing have been applied. The results obtained were as follow: 1. Herbage DM yield per ha with 'wye college' system, set stocking, modified set stocking, rotational grazing and zero grazing were 6936.7 kg,6794.3 kg, 6686.9 kg 6675.7 kg and 5083.4 kg respectively. Among treatments were not different in DM yield. 2. In herbage utilization, zero grazing was the highest than other. Zero Grazing, Rotational grazing, 'Wye college' system, Modified set stocking and set stocking was 89.3%, 70.8%, 64.4% and 46.1% respectively. 3. Daily intake per head with 'wye college' system was the highest than others and zero grazing was the lowest than others. 4. Daily gain with 'wye college' system, rotational grazing, modified set stocking, set stocking and zero grazing were 0.60kg, 0.55kg, 0.50kg, 0.43kg and 0.42 respectively. Among treatment, there was no significance. 5. Total weight gain per ha with 'wye college' system, rotational grazing, modified set stocking, zero grazing and set stocking were 339.5kg, 299.1kg, 253.3kg, 226.6kg and 222.2kg respectively. 6. Grazing time among treatments was not significant. 'Wye college' system spent the shortest time, 367.3 minutes and set stocking consumed the longest time, 422.1 minutes. 7. Daily grazing time by seasonal change with June, July, August, September and October was 304.9 min., 359.4 min., 437.9 min., 483.3 min. and 395.8 min., respectively. According to passing the season, grazing time was lengthened. 8. Grazing time for Korean native cow, native cow charolais and native cow holstein were not significant. Native sow charolais consumed the longest time, 457.0 min., whereas Korean native cow consumed the shortest time, 422.4 min..

• Review of KIISC
• /
• v.7 no.3
• /
• pp.23-38
• /
• 1997

SET은 인터넷과 같은 개방형 통신망에서 안전하고 효율적인 신용카드 기반의 전자 결제를 수행하기 위해 개발된 전자 지불 표준 프로토콜이다. SET을 기반으로하는 전자 지불 시스템은 크게 카드를 소지하고 있는 고객(Cardholder), 상품을 판매하고 대금 결제를 요구하는 상인(Merchant)기존의 은행과 연동하기위한 지불 게이트웨이(Payment gateway)로 구성되며 부가적인 요소로 인증기관(CA)을 포함하고 있다. SET은 고객과 상인, 상인과 은행간의 안전한 거래를 지원하기 위해 여러 가지의 강력한 암호화 알고리즘을 채용하고 있으며 이러한 SET의 보안성은 전자 상거래의 보급에 커다란 기여를 할 것으로 예상된다. 본 논문에서는 기존의 전자 지불 방식을 특성별로 분류하여 그 기능과 구성에 대해 검토하고 SET에서 사용된 보안 기술과 SET을 기반으로 하는 전자지불 시스템의 기능과 특성을 검토·분석한다.