Hong JeongHa's Tianyuanshu and Zhengcheng Kaifangfa

홍성사,홍영희,김영욱,Hong, Sung Sa,Hong, Young Hee,Kim, Young Wook The Korean Society for History of Mathematics 2014 Journal for history of mathematics Vol.27 No.3

Tianyuanshu and Zengcheng Kaifangfa introduced in the Song-Yuan dynasties and their contribution to the theory of equations are one of the most important achievements in the history of Chinese mathematics. Furthermore, they became the most fundamental subject in the history of East Asian mathematics as well. The operations, or the mathematical structure of polynomials have been overlooked by traditional mathematics books. Investigation of GuIlJib (九一集) of Joseon mathematician Hong JeongHa reveals that Hong's approach to polynomials is highly structural. For the expansion of $\prod_{k=11}^{n}(x+a_k)$, Hong invented a new method which we name Hong JeongHa's synthetic expansion. Using this, he reveals that the processes in Zhengcheng Kaifangfa is not synthetic division but synthetic expansion.

高砂百合의 鱗片繁殖에 있어서 IAA, NAA, GA處理의 影響

洪淳馨,許洪旭 釜山大學校 師範大學 1977 교사교육연구 Vol.4 No.2

This study was carried out in order to observe the reproduction of the scale in phillippinense var. formosanum, treated with NAA, IAA, GA group on each developmental stage of the scale. The results obtained were as follows; 1) It was accelerated the ratio of new bulb formation in NAA treatment group on the scale, and inhibited it in GA treatment group. But it was not definited that treated with IAA treatment group. 2) It represented the high rate of juvenile bud in NAA treatment group on the scale and initial cells, and remarkably accelerated the developmental stage of new bulb which proceeding in some degree with GA treatment group. 3) It represented the high rate of leaf number in NAA treatment group and inhibited it treated after the developmental stage which proceeding in some degree. It accelerated the increase of leaf number that treated with GA treatment group, but remarkably inhibited in IAA treatment group. 4) It represented the high rate of flower bud formation in NAA treatment group on the scale, and inhibited it on the latter period. But in GA treatment group, especially GA7 treatment group, it represented the high rate of flower bud formation and also remarkably accelerated it treated after the developmental stage which proceeding in some degree.

CAN 프로토콜 성능 해석에 관한 연구

홍승호,김욱헌 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1

CAN에 접속된 각종 필드 장비들로부터 생성되는 데이터는 크게 산발적 실시간, 주기적 실시간 및 비실시간 데이터의 세 가지 종류로 구분된다. 특성이 다른 이러한 데이터들의 트래픽이 하나의 네트워크 미디엄을 공유하는 경우에 네트워크 트래픽이 적절히 관리되지 못하면 CAN 버스에 접속되는 응용시스템의 성능에 악영향을 미칠 수 있다. 본 연구는 CAN을 자동화 시스템에 도입하는 경우에 실시간 데이터가 전송 허용 한계치를 넘지 않는 동시에 CAN 대역폭을 충분히 활용하도록 하는 대역폭 할당 기법을 제시한다. 본 연구에서는 또한 CAN의 이산 사건 시스템 모델과 제어 시스템의 연속 시간 모델을 통합한 통합 시뮬레이션 모델을 개발한다. 시뮬레이션 모델을 통하여 본 논문에서 제시하는 대역폭 할당 알고리듬의 타당성을 검증하고 실시간 데이터의 지연 시간이 실시간으로 동작되는 제어 시스템의 성능에 미치는 영향을 분석한다. Messages generated from field devices connected by CAN bus are classified into three categories : (1) real-time aperiodic messages, (2) real-time periodic messages, (3) non-real-time messages. Because these share one CAN bus medium, if the traffic of these messages are not efficiently managed, the performance of the application systems interconnected into the CAN bus can be degraded. This paper proposes a bandwidth allocation scheme that satisfies the performance requirement of application systems as well as fully utilizes the bandwidth of CAN bus. Using the simulation model of CAN bus, this study validates the bandwidth allocation scheme and analyzes the effect of network-induced delay on the performance of control system.

Chrysanthemun frutescens L. 의 開花에 關한 硏究

洪淳聲,許洪旭 釜山大學校 師範大學 1979 교사교육연구 Vol.6 No.2

This study was carried out to examine the effects of day length on the flowering in Chrysanthemum frutescens L. The results obtained were as follows; 1) The elongation of stem was accelerated in the long day group and represented extreme inferiority in the short day group. 2) In the long day group, it is shown that a long interenode of stem and a deep lobation of leaf were affected as the morphological change. 3) The differentiation of flower bud was accelerated in the long day group.

[논문]부산시 영도의 세 지역내 식물 집단 구조

허홍욱,이송진,최금자,허만규 부산대학교 환경문제연구소 2004 環境硏究報 Vol.22 No.-

Plant Population Structure of three areas in Young-do of Busan

시각 메카니즘에 의한 이산적인 도트 자극으로부터의 가상선의 인식

홍경호,정은화,김욱현 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

Physiological observations are reported in which the perceptual phenomenon that some simple arrays of discrete dots appear as a continuous curve whereas others are perceived as an angular contour or as consisting of separate groups of dots was investigated. The perception of a continuous curve versus a discontinuous angle was determined mainly by the relative orientations of the dots, I. e., by the angles between successive virtual lines, whereas the length of the virtual lines has relatively little influence. It is important that the perception of dot stimuli is presented by visual lines between dots in visual information processing. In this paper, on the basis of these facts of physiological observations, the perception of visual lines from dot stimuli using visual mechanism was treated. This visual mechanism is proposed by HUbel & Wiesel's paper. The triples of dots were presented in this experiment. these patterns are similar to that of Smith & Vos physiological experiments.

안와내벽의 단독외향골절에서 골절정도와 안구함몰정도와의 관계

진홍률,신시옥,추무진,최영석,양상권,김종욱 대한이비인후과학회 1998 대한이비인후과학회지 두경부외과학 Vol.41 No.5

과학전람회 작품 중 중학교 과학분야의 분석

허홍욱,손수옥,허만규 한국과학교육학회 2003 한국과학교육학회지 Vol.23 No.2

The study is to analyze the middle school-science parts among the products of nation-wide science exhibition for eleven years recently and the results of compared to the content of science-textbooks of middle school. The number of observation in the student parts among the products of nation-textbooks of middle school. The number of observations in the student parts among the products of nation-wide science exhibition was the highest in all methods studied, whereas, most teachers surveyed experiments in their products. The mean Shannon's diversity index (DI) was same trend for students and teachers. There was a non-significant difference of the methods in students and teacher groups according to years and the association between students and teachers were closely connected with methods. The correlation between the content of students' products and texts of middle-school was highly positive for earth science, chemistry, and biology, whereas physics showed negative correlation.

英美普通法上 海上物件運送人의 責任과 船荷證券의 免責約款에 관한 沿革的 硏究

李鴻旭,鄭暎錫 대구효성가톨릭대학교 1993 연구논문집 Vol.46 No.1

요추부 유합 후 인접분절 각운동의 변화

김홍태,박봉훈,천동욱,김형표,정재호 대한척추외과학회 1995 대한척추외과학회지 Vol.2 No.1

A lumbar fusion may influence biomechanically on the remained unfused segments to take over the lost motions. The adjacent segments to fusion particulatly will experience an additional motional stress following a fusion, and then various late complications can occur. Moreover, the amount of this stress may differ according to the levels and extents of the fusions. The aim of this study is to evalu- ate this motional stress in different levels of fusion. A retrospective review of flexion and extension lateral radiograghs was undertaken for 142 consec- utive patients who had undergone various fusions in the lumbar region. Included in this study were the patients who had performed active daily livings after surgery and followed for minimum of two years. They were 60 males and 82 females, having mean age of 46.7(range 14-72). There were three posterior fusions, 123 lateral fusions, and 16 interbody fusions. The extent of fusions were one seg- ment in 71, two segments in 53, three segments in 16, and four segments in two patients. The follow- up period was 53 months in average(range 2-15 years). The intervertebral angles were measured on the flexion/extension lateral radiographs, and then the calculated intervertebral angular motions at follow-up periods were compared with those of preoperative values. The average increases of angular motion at the adjacent segments to fusions were 2.3˚at L1-2 seg- ment(ranging 0˚to 5˚increase),2.5˚at L2-3 segment(ranging 1˚decrease to 8˚increase), 2.9˚at L3-4 segment (ranging 3˚decrease to 12˚increase), 6.7˚at L4-5 segment(ranging 2˚to 18˚ increase), and 1.5˚at L5-S1 segment(ranging 5˚decrease to 7˚increase). The average increases of the above and below adjacent segments to fusions were 3.3˚(ranging 3˚decrease to 18˚increase) and 1.7˚(ranging 5˚decrease to 12˚increase) respectively. There were no significant differences in the changes of angular motion according to the extents of fusion and during these follow-up periods. In conclusion, the angular motions at the adjacent segment to fusions increased most signficantly at L4-5 segment regardless of the fusion sites whether it is below or above a fusion. Excluding the L4-5 segment, the angular motions at the above adjacent segments to fusion increased significantly compared to those at the below adjacent segments. The late complications at adjacent segments to lumbar fusions are expected to appear preferably at these segments.