필라멘트 織物의 Handle에 관한 硏究

李光培,이광배 崇實大學校 大學院 1985 崇實大學校 大學院 論文集 Vol.3 No.-

광양항의 주요 상품의 수출 변동 분해와 국내 지역 간 수출 이전 분석: 다국 및 양국 불변시장점유율모형과 공간전염모형

이광배 전북대학교 산업경제연구소 2022 아태경상저널 Vol.14 No.1

Plastics and articles thereof (according to the classification of HS code, they are classified in chapter 39 products) is one of Korea’s most internationally competitive advantage products. Korea’s export of HS 39 was 31.6 billion dollars, accounting for 5.6% of the world’s HS 39 export in 2020. This paper deals with eight largest exporters of HS 39 in the world, where China is the largest HS 39-exporting country in terms of value, followed by the USA, Germany, Japan, the Netherlands, Italia, France, and Belgium. However, The proportion of HS 39, the main export item of Gwangyang Port, in the port is declining. In order to identify the cause of this decline, this study applies constant market share analysis and shift share analysis to major competitor countries and domestic competitive ports. In addition, by dynamically analyzing the relationship between the difference in export growth rates between Korea and eight major countries and the differences in export growth rates between the eight major countries and the world market, changes in competitiveness between countries over time are also revealed. An import-based constant market share model is additionally introduced to measure the effect of changes in market conditions in eight importing countries on Gwangyang port's HS 39 exports. 광양항의 주요 수출품목인 HS 39(플라스틱 및 그 제품)이 항만에서 차지하는 비중은 하락하고 있다. 본 연구는 이러한 하락의 원인을 규명하기 위하여 불변시장점유율분석과 변이할당분석을 주요 경쟁국과 국내 경쟁항만에 대해 적용한다. 이 연구는 기존의 연구들이 흔히 선택하는 광양항의 주요 시장이 아닌 HS 39의 주요 수출국들을 분석 대상으로 한다. 여기에는 중국, 미국, 독일, 일본, 네덜란드, 이탈리아, 프랑스, 벨기에가 포함된다. 이러한 접근방식은 광양항(한국)과 주요 경쟁국과의 관계를 분석하는데 그치지 않고 글로벌 경쟁력을 갖는 국가들의 수출변동까지 함께 분석할 수 있다는 장점이 있다. 주요 8개 수출국들의 HS 39 수출변동의 요인을 분해하여 주요 요인을 찾아내고 수출경쟁력이 미치는 영향을 도출하여 한국과 주요국 간 경쟁력 비교를 한다. 또한 한국과 주요 8개국의 수출증가율 차이와 주요 8개국과 세계시장의 수출증가율 차이의 관계를 동태적으로 분석하여 시간의 경과에 따른 국가 간 경쟁력 변동도 밝힌다. 수입기반 불변시장점유율모형을 추가적으로 도입하여 8개 수입국 시장여건의 변동이 광양항의 HS 39 수출에 미치는 효과도 측정한다.

Meloidogyne hapla 독성세균의 분리 동정 및 독성물질의 정제

이광배 대구보건대학 2000 대구보건대학 論文集 Vol.20 No.-

The following is experimental result of selecting soil bacteria showing toxicity against Root-knot nematode(Meloidogyne hapla). Out of 286 strains isolated from soil, one(NC67) showing toxicity against M. hapla is selected. The selected strain(NC67) is identified of B. thuringiensis subsp, indiana. It proved out that the toxic material against M. hapla produce by NC67 strain is an exotoxin. The result of examining the existence of the extercellular toxicity product by the toxic strain(NC67) by using activated carbon column chromatography, Dowex 50W column chromatography and TLC of silica1 gel etc. proved out that it is a single material.

國産毛織物의 物理的 性狀에 關한 硏究

李光培 慶北工業專文大學 1966 論文集 Vol.3 No.-

I chose twentynine (29) kinds of wool fabrics produced in Korea, and investigated the physical properties, such as, blending percentage, count, twist, shrinkage,design, cloth width, thickness, weight per square meters, density, porosity, air permiablity, moisture, strength & elongation, and breking strength & aelongation. The results of this research can be summarized as follows: 1. The strength of wool fabrics is in the proportion to the strenght od materials. In other words, fabrics that contain a large percentage of terylene or nylon have more strenght. 2. The strenght of wool fabrics is in inverse proportion to the yarn count. 3. The strenght of wool fabrics increase until twist has a limit, but decrease if it passes the limit. 4. The strenght of short floating fabrics (fabrics which have a large degree of interlacing) have more strength than long floating fabrics. 5. The stren of wool fabrics is in proportion to the shrinkage because shrinkage is in proprtion to the degree of interlacing. 6. The cloth width does not act upon the strength of the fabrics. 7. The strength of wool fabrics is in proprtion to the thickness of the fabrics. 8. The strength of wool fabrics is generally in proportion to the weight per square meters. 9. The strength of wool fabrics is, as a rule, in proportion to the yarn density. 10. It is considered that fabrics which contain little porosity have more strength than fabrics which contain much porosity, but there is very little difference between the two. 11. The fabrics which contain little air permiability have more strength. 12. The relation between the strength and the moisture is changed by the fiber. In other words, when wool, S.F. and exlan get wet the strength decreases and terylene does not change. 13. The strength & elongation of wool fabrics are generally in proportion to the breaking strength & elongation.

製織工程의 基礎的 理論에 關한 硏究

李光培 慶北工業專門大學 1969 論文集 Vol.6 No.-

The research for the weaving process in the past has been only emphasized the constructional theory which study the intersectional process of warp and weft. But in this thesis, the basic theory has been examined by the phenomenalism. The transmition eqation can be gained from both the normal condition and abnormal condition by the position of the cloth-fell and the tension as a state variable. and it is considered that examination of the many characteristics of the weaving machines by the analysis of the transmition equation will be very effective study for the design of the weaving machines.

단방향 링크를 지원하는 이동 Ad Hoc 라우팅 프로토콜

이광배,김현유,정근원,Lee, Kwang-Bae,Kim, Hyun-Ug,Jung, Kun-Won 한국전기전자학회 2001 전기전자학회논문지 Vol.5 No.1

본 논문에서는 단방향 링크를 포함하는 이동 Ad Hoc 망에 대해 비대칭 경로를 지원하는 동적 소스 라우팅 프로토콜을 제안하였다. 기존의 동적 소스 라우팅 프로토콜은 양방향 링크로 구성된 대칭경로만을 지원하도록 구현되어있다. 그러나 실제적인 무선환경에서는 단말의 비대칭성이나 무선환경 특성등에 기인한 단방향 링크가 존재할 수 있다. 따라서 본 논문에서는 좀 더 일반적인 무선환경에 맞는 이동 Ad Hoc 망 라우팅 프로토콜을 구현하기 위하여 단방향 링크를 지원하도록 하였다. 특히 이동성으로 인한 경로 실패를 인식한 경우, 신속한 경로 재설정을 수행하기 위해 다중경로유지 기법을 사용하였다. 성능평가는 평균 경로설정시간 및 평균 데이터수신율에 대해 수행하였으며, 그 값을 얻기 위해 경로 상에 중간노드캐쉬의 사용여부 및 서로 다른 이동성과 연결성을 제공하는 시나리오를 고려하여, 100초 단위로 900초까지 성능평가를 수행하였다. In this paper, we propose a dynamic source routing protocol supporting asymmetric paths for mobile Ad Hoc networks that contain unidirectional links. At present, the existing dynamic source routing protocol supports only symmetric paths that consist of bidirectional links for routing. However, in fact, there can exist unidirectional links due to asymmetric property of mobile terminals or current wireless environment. Thus, we implement a mobile Ad Hoc routing protocol supporting unidirectional links, which is fit for more general wireless environment. Especially, the proposed protocol uses an improved multipath maintenance method in order to perform rapid route reconfiguration when route error due to mobility is detected. For performance evaluation, we consider the following factors: average route discovery time and average data reception rate. In order to obtain the factors of the performance evaluation, we did simulation for 900 seconds in the step of 100 seconds with the following scenarios: usage of route cache in intermediate nodes on route path, and different mobility/connection patterns.

양방향 링크를 지원하는 이동 Ad Hoc 망에 대한 개선된 DSR 라우팅 프로토콜

이광배,김현욱,곽승욱,Lee, Kwang-Bae,Kim, Hyun-Ug,Kwag, Seung-Ug 한국전기전자학회 2001 전기전자학회논문지 Vol.5 No.1

본 논문은 기존 DSR 알고리즘의 경로에러 발견 시 경로 복구 처리과정을 개선하기 위한 방법을 제안한다. 이동 Ad Hoc 망에서는 이동 노드들 자체가 라우터의 기능을 가지기 때문에 두 이동 노드들 간에 경로설정을 위해 잘 정의된 라우팅 프로토콜이 필수적이다. 그러나 기존의 DSR 라우팅 프로토콜은 경로에러 발생 시, 복구 지연으로 인해 패킷이 폐기되는 문제점을 갖고 있다. 그 문제점을 개선하기 위해서 본 논문에서는 경로에러 복구시간을 단축할 수 있도록 개선된 DSR 프로토콜을 제안하고 시뮬레이션을 통해 평가하였다. 평가 결과, 제안한 DSR 프로토콜은 기존의 DSR 프로토콜에 비해 시나리오에 따라 대략 4배에서 30배 빠른 경로에러복구 시간을 제공함을 확인하였다. In this paper, we propose a new method to improve tile processing of route recovery of the existing DSR algorithm on detection of route error. In mobile ad hoc networks, mobile nodes themselves have routing capability. Thus, a well-defined routing protocol is required for route set-up between two mobile nodes. However, the existing DSR routing protocol has problem with dropping of packets due to the recovery delay when a route error occurs. In order to alleviate tile problem, we propose an enhanced DSR protocol to reduce the route error recovery tine and evaluate the protocol through simulation. As tile result of evaluation, we found the proposed DSR protocol provided about 4 to 30 times faster route error recovery time according to the test scenario than the existing DSR protocol.

직류 마그네트론 스퍼터링 방법에 의한 투명 전도성 Ga-doped ZnO 박막 제작 및 최적화

이광배,이경해,주병권 한국물리학회 2003 새물리 Vol.47 No.6

To prepare high-quality transparent conducting Ga-doped ZnO (GZO) films, we have deposited GZO thin films by using the dc magnetron sputtering method and have found the optimum deposition conditions, such as the Ga$_2$O$_3$ content and the substrate temperature, by using sputtering targets with the composition of (1-x)ZnO-xGa$_2$O$_3$ (x = 4.0, 5.3, 7.0 wt\%). For all x, GZO films having minimum resistivity, as well as a higher XRD (200) peak, were obtained at a substrate temperature of 250 $^\circ$C. Amongst them, the GZO film with x = 5.3 wt\% showed a superior resistivity of 3.0 $\times$ 10$^{-4}$ $\Omega\cdot$cm, which was attributed to the higher carrier concentration and Hall mobility, as well as of to the optical transmittance, which was greater than 80 \% in the visible range. From the XPS analysis, the composition ratio of O to Zn, O/Zn, was found to be one of the important parameters to get high quality GZO films and was about 100 \% for an optimized GZO film. Ga이 도우핑된 양질의 투명 전도성 ZnO (GZO) 박막을 제작하기 위하여 (1-x)ZnO-xGa$_2$O$_3$ (x = 4.0, 5.3, 7.0 wt\%) 조성의 스퍼터링 타겟을 제작하고 이를 이용하여 GZO 박막을 직류 스퍼터링 방법으로 제작하였다. 모든 Ga$_2$O$_3$ 함량에 대하여 기판 온도 250 $^\circ$C에서 ZnO (200) XRD 피크 세기가 가장 크며, 전기비저항이 가장 작은 GZO 박막을 얻었으며, 이 중에 x가 5.3 wt\%인 GZO 박막의 경우 전기비저항이 3 $\times$ 10$^{-4}$ $\Omega\cdot$cm 및 가시광선 영역의 광투과도가 80 \% 이상의 우수한 특성을 나타내었다. 이러한 낮은 전기비저항 값은 높은 Hall 이동도 및 나르게 농도에 기인한다. XPS 스펙트럼의 분석 결과 GZO 박막에서 O/Zn 조성비가 100 \% 즉, ZnO 결합 및 구조가 변하지 않는 상태에서 불순물 Ga가 첨가될 경우 최적의 GZO 박막을 얻을 수 있으며, O/Zn 조성비가 최적화에 중요한 변수임을 알 수 있었다.

반응성 스퍼터링 방법으로 제작한 비정질 Ta-N 박막의 광학적 특성

이광배,이경행 한국물리학회 2004 새물리 Vol.48 No.2

We have prepared Ta-N thin films on Corning 7059 glass substrates by means of the reactive rf sputtering method using a Ta metal target. We obtained hexagonal f-phase Ta, polycrystalline Ta-N, and amorphous Ta-N thin films by increasing the N2 partial pressure (P(N2)) from 0.05 mTorr to 5 mTorr at a fixed Ar partial pressure of 1 mTorr. Among them, the optical gap of amorphous Ta-N films increased from 2.3 eV to 3.6 eV with increasing P(N2). Such behaviors of the optical properties of Ta-N films may be interpreted as being due to an increase in the number of N-rich Ta-N chemical binding states, in the number of which are assumed to be amorphous, accompanied by decrease of relatively Ta-rich Ta-N chemical binding states, which are assumed to be crystalline.

PILE織物의 特性에 關한 硏究

李光培 崇田大學校 1976 論文集 Vol.6 No.1

The properties-kinds of yarn, twist number, denier, woven structure, density, pile length and width, tensile strength and elongation, abrasion and warmth retaining - of foreign velveteen and Korean velveteen have been investigated and compared. The results of this study is as follows; 1) The yarn of two kinds of velveteen were quite different. It is notified that the yarns ground warp, ground weft and pile thread of foreign velveteen are all viscose rayon. and the yarns ground warp and ground weft of Korean velveteen are nylon, and those of pile thread are acetate rayon. 2) Twist, denier, woven structure, density, pile length and width of the samples are same or there is a little difference which gives no influence to the characteristics of samples. 3) Tensile strength and elongation and abrasion of foreign velveteen are remarkable. 4) The warmth retaining properties of both samples are resemble and excellent. 5) It is proper to urge to use hollow yarn on Korean velveteen because the elasticity and handling of foreign velveteen are excellent by using hollow yarn on pile thread of foreign velveteen.