마이크로스트�� 안테나 設計에 관한 硏究

李榮魯 서울産業大學校 1984 논문집 Vol.20 No.1

마이크로 스트맆 안테난는 접지면과 유전체층으로 불리된 평면구조의 방사 素子와 급전 回路 구성이되며, 성능이 우수하고 가벼우며 크기가 작아 設置하기가 쉽고 값이 싼반면 매우 좁은 주파수 대역에 제안되어 있다. 이 안테나는 접지면을 통해 뒤로 급전할 수 있으며 옆으로 급전할 수도 있다. 여기에서 원형 마이크로스트맆 안테나를 設計 제작하려 하며 이에따라 마이크로스트맆 선로의 特性, 원형, 공진기의 용량과 공진주파수들을 알아보았고, J, Q Howell의 경험에 따른 제작을 시도하였다. 즉, 원형방사기와 원점으로부터 반경의 약 ⅓지점에 급전점을 정해 접지면을 통해 뒤로 급전함으로 임피턴스 접합을 시도하였다. 그리하여 제작된 안테나의 정재파비, 공전주파수, 방자형태 등을 측정하였다. In this paper "Microstrip Antenna in earth vicissitude divided a class plane structure emission an element a studden change circuite structure, also efficiency and excellent light, size is a big to establishment easy but frequency band is limited.

디지탈시스템에 있어서 交叉雜音의 計算에 관한 硏究

李榮魯 서울産業大學校 1980 논문집 Vol.13 No.1

This paper deals with a mathematical method of finding Cross-Coupled Noise-Voltage in Digital Equipment A formula is derived which permits, either strictly mathematical or with some approximations, Calculation of Noise, thus providing a means for a mathematical approach to interconnection design.

LAN 구성 및 응용에 관한 硏究

최승우,이영노 서울産業大學校 1997 논문집 Vol.46 No.1

According to the arriving computer and communication days, it is necessary to prepare the basis of composition for LAN application system which good interconnection ability for hold a Data Base in common. But there is not standard network or form. Therefore, this will be a good guide which gathering a basis article and reference Data for a case of composition in internal LAN Application system. Specially, electric power corporation has a nation wide branch offices and high level communication network all over the country. This paper shows each branch standard form, interface device, protocol, internetworking device, networking management systems etc..., which concentrated with LAN application system. Composition of electronic power corporation, and make the high speed, high degree of efficiency application system.

가교폴리에틸렌의 교류트리 특성에 관한연구

賈出鉉,李榮魯 서울産業大學校 1995 논문집 Vol.41 No.1

In this paper, as the tree was generalied by changing applied voltage and time, noize or dim photograph of obtained with optical microscope. And then, fractal dimension of each photograph was calculated according to the applied voltage with are as following. When 9[kV], 12[kV], 15[kV], 18[kV] was applied the obtained fractal dimension was 1.3∼1.5, 1.5∼1.7, 1.6∼1.8, 1.7∼1.9 respectively.

韓國의 歸化植物(1)

李永魯,오용자 梨花女子大學校 韓國生活科學硏究院 1974 韓國生活科學硏究院 論叢 Vol.12 No.-

The Korean native plants were studied by several foreign and home botanists since the end of the 19th century. Therefore about 4,000 species of Korean native vascular plants are now classified. Recently many of the unfamilier plants are often in the fields of Korea. These were introduced for the purpose producing of greenery and foliage grasses from the certain foreign country, or accidentally brought in with other seeds. Some good and bad herbs and trees of foreign origin grow wildly in various places in Korea. The purpose of this study is to report what the naturalized plants in Korea. This report includes 5 species of Compositae which are as follows: 1. Ambrosia artemisiifolia L. var. elation Descoutils 2. Ambrosia trifida Linn. 3. Bidens frondosa Linn. 4. Cosmos bipinnata Car. 5. Erechitites hieracifolia Raf.

韓國産 민들레 속의 分類學的 硏究

李永魯,오용자 梨花女子大學校 韓國生活科學硏究院 1970 韓國生活科學硏究院 論叢 Vol.4 No.-

Since early in the twentieth century several plant taxonomists have syudied Korean flora including the genus Taraxacum and described many species of the taxa. Nakai reported eleven species of Korean dandelions based on the characteristics of gross morphology on Synoptical Sketch of Korean Flora in 1952. Ohwi reported twentg two species of Japanese Taraxacum in Flora of Japan in 1965. Dandelions present very similar gross morphology among them, therefore, the taxa can not be identified easily according to the phenotypes. Seems to be many nusolved problems of the Korea dandelion classificaftion. It is proposed to study the dandelions in south Korea for cytotaxonomic and anatomical viewpoints. Chromosomes of the dandelions were counted at the root tips by smear method applying aceto-orecein. The chromosomes are as follow: Taraxaum platycarpum H.Dahlataedt 2n=24, T. coreanum Nakai 2n=32, T. officinale Weber(introduced) 2n= 24, Thallasanensis Nakai 2n=16, native south Korean dandelions show polyploidal chromosome numbers as 16,24, and 32. Japanese taxa of Taraxacum platycarpum shown 16 chromosomes in somatic cell, while the same taxon in Korea was counted as 24 chromosomes. Epidermal patterns of leaf blades were examined and the largest stomata and fundamental cells of epidermis were found on T. coreanum Nakai. The fundamental cells of epidermis of T. hallasanensis is shallowly waved, but the fundamental cell walls of leaf epidermis of T. officinale are deeply waved and the stomata are larger than the former taxon (Table 1, Plate2, fig. 2). Pappus hairs of the dandelions show definitely different lengths among the taxa and also leaf shapes (Table fig 1,2,3,) The characteristics of cytology and epidermal patterns are correlated with the pappus and leaf shapes. All these characteristics can be very useful for identification and finding the systematic line of the Korean dandelions.

韓國産 제비꽃屬植物의 葉表皮와 종자의 形態學的 硏究

李永魯,李愚喆 梨花女子大學校 韓國生活科學硏究院 1968 韓國生活科學硏究院 論叢 Vol.1 No.-

We have studied epidermis and seeds on twelve species of violets and have found the following diffeences in characteristics; Epidermis are variable among the taxa. stomata are present at both surfaces of leaf blades on the taxa viola grypaceras, V.lactiflora, V.mandshurica, V. raddeana, V. seoulensis, V. takesimana, V. variegata and V. verecunda, while stomata are absent at adaxial surfaces of leaf blades on V. seoulensis and lactiflora are larger than the other taxa. Both taxa are shown as 48 chromosomes in somatic cells intead of the 24 or less chromosomes of the other taxa (1967). In general, call walls of abaxial surface are more waved than the adaxial. Seed size is variable even in the same taxa. The plants, Viola rossii and. V. aldida produce considerablly large seeds (Table 2.) Small seeds are shown by the taxa of V. grypoceras. Color differences of seeds are also shown by the taxa, as dark brown, dark gray and yellew brown The characteristics of epidermis and seed size and color are considered as very useful characteristics for the Viola identificiation and classification.

Hot Spot 상호연결 수행망에 관한 硏究

李榮魯 서울産業大學校 1989 논문집 Vol.30 No.1

Interconnection Net Work is to Provide Communication among functional modules, the Interconnections Considered are Generalized Cube Net Works, two situation are examined. A memory module is equally likely to be address by a processor has a favorite memory. This paper proposes condition of operation in interconnection Net Work through performance evaluation by simulation.

척추전문병원과 비전문병원의 의료이용 비교분석

이영노,정윤지,이광수 한국보건행정학회 2024 보건행정학회지 Vol.34 No.1

Background: The purpose of this study was to compare and analyze the differences in charges and length of stay per case between spinespecialty hospitals and non-specialty hospitals, and to identify the factors that influenced them. Methods: This study used claims data from the Health Insurance Review and Assessment Service, including inpatient visits from January 2021to December 2022. The healthcare facility status data was used to identify the characteristics of study hospitals. Multilevel analysis was conductedto identify factors associated with the charges and Poisson regression analysis was conducted to analyze the length of stay between spinespecialty hospitals and non-specialty hospitals. There were 32,015 cases of spine specialty hospitals and 17,555 cases of non-specialty hospitals. Results: For four of five common spinal surgeries, specialty hospitals shaped longer length of stay than those of non-specialty hospitals. Multilevel and Poisson regression analysis revealed that regardless of the type of surgery, higher age and higher Charlson comorbidity indexscores were significantly associated with an increase in both the charges per case and length of stay (p<0.05). However, when hospitals werelocated in metropolitan areas, there was a significant decrease (p<0.05). Conclusion: This study found that specialty hospital had higher inpatient charges and loner length of stay contrary to the previous studyresults. Further studies will be needed to find which contribute to the differences.

억새속 식물에 관한 분류학적 연구

이영노 全北大學校 生物學硏究所 1981 生物學硏究年報 Vol.2 No.-

본 연구는 세계산 억새속식물의 분류학적 연구로서 1964년 일본 동경대학에서 이루어진 것이다. 억새식물은 아세아 지역에 주로 나는 것으로서 즉 한국·일본·중국·시베리아·인도·네파-루·태국·말레이지아·인도네시아·월날·마이크로네시아와 포리네시아에 나는 것이다. 이 식물에 대하여 많은 학자들이 단편적으로 연구한 바 있으나 계통적인 것을 논한 것은 없는 것으로 사료된다.