플라즈마 용사 TiO₂코팅 강재의 마찰속도 변화에 따른 마모특성

김귀식,김성익,김희곤 제주대학교 산업기술연구소 1999 尖端技術硏究所論文集 Vol.10 No.2

In this paper, wear behaviors of plasma sprayed ceramic coating steels have been investigated experimentally through the friction coefficient, friction force and weight loss. In wear behaviar of substrate(S45C) and TiO2 coating specimen in dry friction, the friction coefficient is monotonous according to increase the friction velocity. The amount of weight loss increase when the load is high. The wear and friction in lubrication doesn't occur almostly because of the lubrication property. The wear of stator, SUJ II pin, is small in S45C, and large in TiO2, The adhesiveness of TiO2 wear in lubrication is larger than that in air, so the lubrication is important to the low wear of the tribology.

RANDOM 진동하중을 받는 구조물용 재료의 피로파괴에 대한 기초적 연구

김귀식,조성배 濟州大學校工科大學附屬産業技術硏究所 1990 尖端技術硏究所論文集 Vol.1 No.-

This paper was to investigate a fatigue damage of structural material under service loading, random loading. This examined irregular factors(α), wave counting methods and equivalent load amplitudes about three random loading waves generated by a personal computer. Results obtained are follows. 1. It is greatly different of counting results between range and rainflow cycle counting methods applied wide band spectrum, but it is similar those applied narrow bane one. 2. A Equivalent load amplitude, Leq, is obtained from m, the index of Paris' rule on a constant load amplitude test, and the result of cycle counting. Here, m is larger, Leq is greater. 3. In relation between irregular factor(α) and the cycle method, when α is near 1.0, Leq calculated by rainflow method is similarly that by range one, but when α is lower than 0.99, the former is large rather than the latter.

TiO₂ 세라믹 용사코팅재의 마모특성

김귀식,김성익 제주대학교 공과대학 첨단기술연구소 2003 尖端技術硏究所論文集 Vol.14 No.1

Wear behaviors of plasma sprayed ceramic coating materials have been investigated experimentally through the friction coefficient, friction force and weight loss. In wear behavior of substrate(S45C) and TiO_(2)coating specimen in dry friction, the friction coefficient is monotonous with increasing the friction velocity. The amount of weight loss increase when the load is high. The wear and friction in lubrication do not occur almostly because of the lubrication property. The wear of stator, SUJ II pin, is small in S45C, and large in Ti0_(2). The adhesiveness in TiO_(2) wear in lubrication is larger than that in air, so the lubrication is important to the low wear of the tribology.

어휘부분의 특성과 발전

박상수,이귀덕 부산 외국어 대학교 1996 外大論叢 Vol.15 No.1

It has been considered since the ST-model that an item in the lexicon is a set of lexical features which can not be predicted with general rules ; and this concept has been continued for almost 30 years in the Chomsky's theoretical framework. In the ST-model, lexicon is separated from phrase structure rules(PS-rules) and constituted Deep-Structure with the PS-rules. In the PP-model, while various kinds of transformational rules are greatly diminished, lexicon-centered grammatical system is pursued. Syntactic and semantic information of lexicon items is of great importance in the PP-model ; X'-theory, θ-theory, among others, and projection principle as a subtheory, play a major role in selectiong lexical items. In the minimalist framework, a language consists of two component : a lexicon and a computational system. Accordingly, the importance of lexicon is maximally focused on. The computational system is operated only with lexical information, and the only legitimate objects at the PF/LF are lexical elements. It can be said that compared with other rules and components, which have been greatly minimized or eliminated, the lexicon has become relatively important in its role as the source of idiosyncratic lexical information. This point is investigated in this study.

自動車 구동시의 實荷重疲勞에 대한 解析的 硏究

김귀식,조성배 濟州大學校工科大學附屬産業技術硏究所 1991 尖端技術硏究所論文集 Vol.2 No.-

This study was investigated of the generation of random waves, cycle counting methods and evaluation of equivalent amplitudes on service loadings. The service loading waves are examined at four parts of a automobile, i. e., front axle(FA), transmission(TM),universal joint(UJ) and manifold(MF). The amplitude of the service loading waves are large at FA and TM, and small at UJ and MF, respectively. The wave frequencies of the four parts had band from O to 5㎐, especially, they are shown to the most power spectral density at 4㎐. The results of range and rainflow cycle counting method on the waves are about the same at the each part, since these had narrow frequency bands. The equivalent amplitudes of the waves by the rainflow method are alike FA and TM, and UJ and MF, respectively, but those by range method are different all parts. Therefore, the former is more available than the latter according to consideration of fatigue damage and the cycle counting results.

유동층반응기에서 CVI에 의한 SiC증착된 고표면적 촉매지지체 제조에 관한 수치모사의 연구

鄭貴榮,李成柱 弘益大學校 科學基術硏究所 1999 科學技術硏究論文集 Vol.10 No.2

In this research, to improve the corrosion resistance and oxidation resistance of catalyst support in manufacturing the catalyst, the formation of SiC layer on the activated carbon by permeating SiC from dichlorodimethylsilane(DDS) into pore and depositing while the porous structure was kept was studied. Activated carbons of sizes of 4-12, 12-20, 20-40 mesh were used. The best conditions of manufacturing the support were found by studying the characteristics of SiC under various deposition conditions. The results from the mathematical modeling were compared with the experimental results. The changes of the amount of deposition, pore diameter, surface area with time were obtained by simulating convection, diffusion of DDS and reaction in isothermal reactor at steady state. The uniform deposition in the pores of sample was obtained at a lower concentration of DDS and a lower pressure. Additionally, from the observation that the pore diameter and the surface area have minimum values at a certain time of deposition, it was known that deposition occurred inside of the pore at first and then on the outside of particle.

고구려의 대외문화 교류와 학교교육 : 太學을 중심으로 Focused on Tae Hak

김귀성 한국교육사학회 2004 한국교육사학 Vol.26 No.2

This paper is to examined the nature of Tae Hak in Koguryo period, if the Tae Hak of Koguryo was effected by foreign cultural exchange, through ascertaining the relation with Chinese culture in the view of foreign relation, transmit of Buddhism culture, system of Tae Hak in ancient China, and Chinese law system at that time etc. I'd like to summing up the out put as follows First, in the view of foreign relation and transmit of Buddhism culture into Koguryo, the time when system of Tae Hak in Koguryo was effected by ancient Chinese Tae Hak at least in the early days would be Wei and Jin dynasty(魏晋) based on Han(漢) culture, latter period by Tang(唐)culture. However, it seemed that related with Buddhism, indirect effect was rather greater than direct. Second, the relation of Tae Hak in Koguryo with ancient Chinese Tae Hak, in the early days it would be effected by Han(漢) and Jin's(晋) culture, latter period by Tang(唐)culture. Third, if Koguryo culture was effected by Han·Wei and Jin(漢,魏,晋)culture, the proclamation of law in Koguryo would be effected by Tai Shi law(泰始律令). However there was a Doctor who was a school teacher in Koguryo just like from Jin dynasty to Tang period, if official rank and contents of school education differ from China, I can analogize unique characteristics of Koguryo Tae Hak. But it would be remained that under the such hypotheses, how we prescribe the unique characteristics of Koguryo Tae Hak. It could be seemed that though educational system of Koguryo was effected by china, it may be settled suitable for our situation and also developed as a unique characteristics of Koguryo Tae Hak.

플라즈마 용사 TiO_(2)코팅 강재의 마찰속도 변화에 따른 마모특성

김귀식,김성익,김희곤 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.2

In this paper, wear behaviors of plasma sprayed ceramic coating steels have been investigated experimentally through the friction coefficient, friction force and weight loss. In wear behaviar of substrate(S45C) and TiO_(2) coating specimen in dry friction , the friction coefficient is monotonous according to increase the friction velocity. The amount of weight loss increase when the load is high. The wear and friction in lubrication doesn't occur almostly because of the lubrication property. The wear of stator. SUJ Il pin. is small in S_(4)5C. and large in TiO_(2). The adhesiveness of TiO_(2) wear in lubrication is larger than that in air. so the lubrication is important to the low wear of the tribology.

Random 진동하중을 받는 구조물용 재료의 피로파괴에 대한 기초적 연구

김귀식,조성배 濟州大學校 工科大學 産業技術硏究所 1990 産業技術硏究報告 Vol.1 No.-

This paper was to investigate a fatigue damage of structural material under service loading. random loading. This examined irregular factors (α) , wave counting methods and equivalent load amplitudes about three random loading waves generated by a personal computer. Results obtained are follows. 1. It is greatly different of counting results between range and rainflow cycle counting methods applied wide band spectrum, but it is similar those applied narrow band one. 2. A Equivalent load amplitude, Leq. is obtained from m. the index of Paris' rule on a constant load amplitude test, and the result of cycle counting. Here. m is larger, Leq is greater. 3. In relation between irregular factor(α) and the cycle count method, when α is near 1.0 Leq calculated by rainflow method is similarly that by range one, but when α is lower than 0.99. the former is large rather than the latter.

Android 기반의 PC 원격 제어기

박귀상;이나경;조혜민;양길웅;박세명 인제대학교 2012 仁濟論叢 Vol.27 No.1

One of the most attracting and interesting point of the application of the smart phone, particularly such as Android based smart phone, is not only providing additional useful functions to the user but also its easy and wide availability through the connection of the other types of devices. In this paper, we proposed and implemented Android application for the Remote PC control. In this paper, we used UDP network communication for sending data to the server and controlled the packet transmission rate to minimize the packet loss. And we used Spy++ tools and PostMessage function to controll outer device. We show that application based on the Android is very useful method for achieving and supporting the harmonized function between various independent devices