• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2006.05a
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• pp.121-126
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• 2006

본 연구는 반도체 산업의 공정에서 자동화를 위한 Solution 개발에 초점을 두었다. Spec-out(불량)이 발생하였을 경우에 엔지니어가 원인을 분석하고 조치를 취하던 이전의 방식을 탈피하여 Expert Knowledge Base System의 On-Line방식으로 전환하고자 한다. 이러한 시스템을 구축하기 위해 공정과 계측간에 발생하는 파라메터들의 상관관계를 수학적으로 도출하였으며, 상관관계들을 이용하여 이탈 발생시 처리를 하기 위한 Rule을 구성하였다. 그리고 이 Rule들을 바탕으로 이탈발생의 원인을 분석하는 추론 시스템을 구성하여 즉각적이고 신속하게 처리를 하기 위한 이탈처리 분석 시스템을 구성하는 방법을 연구하였다.

• Proceedings of the KIEE Conference
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• 2005.07d
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• pp.2970-2973
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• 2005

본 논문에서 상관관계분석 기술을 이용하여 IP망과 전송망에서 발생되는 장애유형을 패턴화하였으며, 이를 Rule로써 자동처리가 가능하도록 시스템화하였다. 정의된 Rule로 인하여 이벤트 자동분석 및 장애근원 도출이 가능해졌으며, 도출된 근원 이벤트는 운용자에게 이벤트 분류를 위한 수고를 덜어주고, 궁극적으로 신속한 대처가 가능하게 하였다. 알고리듬의 효율성을 보이기 위하여 IP망과 전송망을 대상으로 10여개의 장애유형 표준을 패턴화하고 Rule로서 정의하여 적용한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.382-385
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• 2006

오늘날의 네트워크 환경은 다기능, 멀티 벤더(Multi-Vendor)의 분산 환경으로 장비 및 프로토콜의 다양성, 네트워크 구조의 복잡성, 지역적 분산 등 광대하고 복잡한 네트워크로 구성되어 있다. 따라서 기존의 Vendor NMS를 사용한 NMS가 일부 이루어지고 있으나 복잡한 네트워크 구성에 부합하는 신속한 장애 파악이 어려운 실정이다. 본 논문에서는 복잡하고 다양한 멀티 네트워크 환경에서 이벤트 상관관계 장애관리에 구현기법을 기술하고자 한다.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.2
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• pp.25-36
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• 2007

We researched the change of astigmatism power when the fixation point moved from far distance to near distance. Astigmatism power was measured by using both eyes open-view auto-refractometer. We divided the ages between 5 and 67 years old into 12 groups with 1,598 healthy eyes(male-698 eyes and female-900 eyes) without eyes problems and experiences of eyes operations. The mean power in far astigmatism showed that with-the-rule of the total astigmatism: -0.79D, with-the-rule of the corneal astigmatism: -1.07D and against-the-rule of the residual astigmatism : -0.79D were found most respectively. The correlation between cornea astigmatism and total astigmatism was y=0.7493 x + 0.5661 r=0.6510, residual astigmatism and total astigmatism was y=0.248 x - 0.5926 r=0.2598 and corneal astigmatism and residual astigmatism was y=-0.4439 x - 0.1813 r=-0.5551 in the far distance. The mean power in near astigmatism showed that with-the-rule of total astigmatism : -0.92D, with-the-rule of corneal astigmatism : -1.12D, against-the-rule of residual astigmatism : -0.87D were found most respectively. In the near distance, The correlation between corneal astigmatism and total astigmatism was y=0.6872 x + 0.5934 r=0.6204, residual astigmatism and total astigmatism was y=0.303 x - 0.6066 r=0.3165, corneal astigmatism and residual astigmatism was y=-0.46 x - 0.0626 r=-0.5322. When the fixation point moved far distance to near distance, the differences of power according to the type of astigmatism were total astigmatism: $-0.07D{\pm}0.44D$, corneal astigmatism: $-0.04D{\pm}0.54D$ residual astigmatism:$0.01D{\pm}0.53D$. Most of astigmatism refractive power was increased except for oblique-the -astigmatism. When the fixation point moved far distance to near distance, the change of astigmatism refractive power showed total astigmatism: 540 eyes(33.7%), corneal astigmatism: 638 eyes(39.9%), residual: 841 eyes(52.6%).

• Korean Journal of Childcare and Education
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• v.11 no.5
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• pp.19-37
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• 2015

The purpose of this study was to find out the linkage between emotional display rules and emotional labor strategy and the affects of the display rule factors on the emotional labor strategy. The participants of this study were 268 childcare teachers in Seoul, and the collected data were analyzed using correlation analysis and multiple regression analysis. The results were as follows: First, display rule perception was positively related to deep acting and surface acting. And the deep acting was positively related to display rule education, commitment, fairness of display rule, and explicit display rule. Second, display rule perception has a positive effect on deep acting and surface acting. And the commitment to display rule has a positive effect on deep acting. This study provided practical implications to help childcare teachers' emotional labor, and suggested directions for the education program for the emotional competence of childcare teachers.

• Journal of The Korean Association For Science Education
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• v.24 no.6
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• pp.1106-1117
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• 2004

The purposes of this study were to analyze types of scientific emotion word and to investigate the relationship between the ISE(Index of Scientific Emotion) and the ability of science-knowledge generation in subjects' scientific observation and rule-discovery. The subjects were asked to perform four scientific tasks. The tasks were developed that are suitable for scientific observation and rule-discovery. In performing tasks, the subjects were asked to describe their generated science-knowledge and scientific emotion through self-report questionnaire, performing each task. The strength of their scientific emotion was also measured using adjective emoticon check lists. In subjects' scientific observing, they showed 33.3% of interest emotion which was the biggest, 15.0% of acceptance emotion, and 11.3% of love emotion, respectively. In scientific rule-discovering, types of emotion were shown as 23.8% of interest, 21.5% of disgust, and 10.8% of acceptance, respectively. In addition, ability of science-knowledge generation was significantly correlated to ISE.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.161-162
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• 2006

동기식 전송망에서 발생되는 장애는 장비의 구성정보에 따라 다양한 알람정보를 발생시킨다. 전송망에서 발생되는 알람은 장애 원인으로 추정되는 근원알람과 장애로 인해 파생되는 파생알람으로 분류할 수 있다. 본 고는 이러한 분류체계를 기반으로 알람 상관관계 기법을 적용한 네트워크 장애관리시스템 구현 사례를 제시한다. 적용된 상관관계 방법은 Rule 기반의 접근방법 및 Codebook 기반의 접근방법을 접목한 hybrid 상관관계 방법을 적용하였고, 복잡성을 최소화 하기 위해 회선 기반의 grouping 기법을 사용하였다.

• The KIPS Transactions:PartC
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• v.16C no.4
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• pp.449-460
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• 2009

The signature hashing algorithm[9] provides the fast pattern matching speed for network IPS(Intrusion Prevention System) using the hash table. It selects 2 bytes from all signature rules and links to the hash table by the hash value. It has an advantage of performance improvement because it reduces the number of inspecting rules in the pattern matching. However it has a disadvantage of performance drop if the number of rules with the same hash value increases when the number of rules are large and the corelation among rules is strong. In this paper, we propose a method to make all rules distributed evenly to the hash table independent of the number of rules and corelation among rules for overcoming the disadvantage of the signature hashing algorithm. In the proposed method, it checks whether or not there is an already assigned rule linked to the same hash value before a new rule is linked to a hash value in the hash table. If there is no assigned rule, the new rule is linked to the hash value. Otherwise, the proposed method recalculate a hash value to put it in other position. We implemented the proposed method in a PC with a Linux module and performed experiments using Iperf as a network performance measurement tool. The signature hashing method shows performance drop if the number of rules with the same hash value increases when the number of rules are large and the corelation among rules is strong, but the proposed method shows no performance drop independent of the number of rules and corelation among rules.

• The Korean Journal of Rheology
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• v.10 no.4
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• pp.234-246
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• 1998

The objective of this study is to investigate the correlation between steady shear flow (nonlinear behavior) and dynamic viscoelastic (linear behavior) properties for concentrated polymer solutions. Using both an Advanced Rheometic Expansion System(ARES) and a Rheometics Fluids Spectrometer (RFS II), the steady shear flow viscosity and the dynamic viscoelastic properties of concentrated poly(ethylene oxide)(PEO), polyisobutylene(PIB), and polyacrylamide(PAAm) solutions have been measured over a wide range of shear rates and angular frequencies. The validity of some previously proposed relationships was compared with experimentally measured data. In addition, the effect of solution concentration on the applicability of the Cox-Merz rule was examined by comparing the steady flow viscosity and the magnitude of the complex viscosity Finally, the applicability of the Cox-Merz rule was theoretically discussed by introducing a nonlinear strain measure. Main results obtained from this study can be summarized as follows : (1) Among the previously proposed relationships dealt with in this study, the Cox-Merz rule implying the equivalence between the steady flow viscosity and the magnitude of the complex viscosity has the best validity. (2) For polymer solutions with relatively lower concentration, the steady flow viscosity is higher than the complex viscosity. However, such a relation between the two viscosities is reversed for highly concentrated polymer solutions. (3) A nonlinear strain measure is decreased with increasing stran magnitude, after reaching the maximum value in small strain range. This behavior is different from the theoretical prediction demonstrating the shape of a damped oscillatory function. (4) The applicability of the Cox-Merz rule is influenced by the $\beta$ value, which indicates the slope of a nonlinear stain measure (namely, the degree of nonlinearity) at large shear deformations. The Cox-Merz rule shows better applicability as the $\beta$ value becomes smaller.

• Journal of Korean Ophthalmic Optics Society
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• v.9 no.2
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• pp.439-446
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• 2004

Many studies have reported that retinal defocus cause and increase refractive error specially myopia. Uncorrected astigmatism may be one factor of retinal defocus factors. To understand the relationship between myopia and astigmatism 62 college students were participated in this study. Spherical refractive error and astigmatism were measured using N-vision 5001 autorefractor (Shinnippon). Co-relations between spherical refractive error and astigmatism were high both in the with-the-rule astigmatism group(r=0.53; ANOVA F=32.40, N=87, P<0.05) and oblique astigmatism group (r=0.53ANOVA F=5.14, N=15, P<0.001). However it was very low (r=0.09; ANOVA F=0.18, N=22, P<0.001)in the against-the-rule stigmatism group. In the total group co-relation was also high (r=0.56: ANOVA F=77.80, N=173, P<0.001). Uncorrected astigmatism may cause and increase spherical refractive error.