국산 흑연의 熱的성질과 결정성

金俊榮,金淙澤 경북대학교 산업기술연구소 1987 産業技術硏究誌 Vol.15 No.-

The crystallinity and the thermal property of four graphites produced in Korea were studied by x-ray and DT/TGA. The sample OR exhibited to be most well graphitized crystal whereas the TH and GA were relatively well crystallized. The amorphous graphite SW had shown little crystallinity by x-ray diffractogram. DTA and TGA study of these graphite show significant difference in ignition temperature and heat of combustion according to the crystallinity.

接木한 배나무의 樹齡에 따르는 燐酸의 消長에 대한 硏究

金晙敎,元世鎬,安鶴洙,鄭熙敦 건국대학교 1968 學術誌 Vol.9 No.1

It is very essential problem that the study on the translocation of nutritious substances between the scion and the stock when the seedlings were grafted. So the present experiments was carried out to investigate the behavior of phosphorous in the leaves, stems, new shoots and roots of scion and stock for the different age of tree after the pear-tree was grafted. For the study the seedlings were raised in the green-house of Agr. and Indus. college of Kon-kuk University. The results obtained from this work may be summarized as follows. ① The Phosphosrous contents in leaves, 2 to 3 year grafted-pear was slightly increased as compare with the same year-old stock. ② The phosphorous contents in the new shoots, one year grafted-pear was markedly decreased as compare with the same year-old stock. However 2 year-old galled-pear was gently increased. ③ The phosphorous contents in the stem and roots, there is no different between the grafted-pear (scion) and stock without relation to the age of tree.

사과의 品種간 授粉이 結實性과 果實形質에 미치는 影響<第2報>

金晙敎 건국대학교 1968 學術誌 Vol.9 No.1

① With regard to crossing time and fruitage, no difference was observed in fertilization abilities and bearing ratio within one to five days after castration, but after one week after castration both bearing ratio and the number of seeds decreased except in case of Golden Delicious, ② The completion of fertilization appears to request three to four days after pollination, time required for fertilization after pollination is around 72 hours. ③ Differences in bearing rates appeared to be related to individual varieties of pollen and not to the number of different pollen being mixed. ④ Tests were made upon self-incompatibility and cross-incompatibility and it was found that an addition of Glucose at the fertilization effected a better fruitage and more seeds formation. These results suggested the necessity of a supplementary addition of an enzyme as nutrient. ⑤ Results were in good agreement with the experimental report of Takebe (1957), who suggested the non pollinations in incompatibility due inhibiting substances which surpress the growth of pollen tube; the pressing being effected by the upper half of the style rather than the lower half the style. ⑥ Influences of the varieties and the method of mixed-pollen upon fruits forms, weights, and colours were examined for a variety of apples and results followed Metaxenia phenomenia.

A Profile of Mental Delayed Children in the Health Care Program of a Public Psychiatric Hospital in Central Taiwan

Jyun-Dia Huang,Hong Chen,Wen-Chuan Shao,Shieh-Hsien Hsiang,Jie-Shin Jhang,Sheng-Liang Wu,Jyun-Shian Liou 한국간호과학회 2009 한국간호과학회 학술대회 Vol.2009 No.10

Navigation Control of Mobile Robots Using an Interval Type-2 Fuzzy Controller Based on Dynamic-group Particle Swarm Optimization

Jyun-Yu Jhang,Cheng-Jian Lin,Chin-Teng Lin,Kuu-Young Young 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.5

This paper presents an effective navigation control method for mobile robots in an unknown environment. The proposed behavior manager (BM) switches between two behavioral control patterns, wall-following behavior (WFB) and toward-goal behavior (TGB), based on the relationship between the mobile robot and the unknown environment. An interval type-2 fuzzy neural controller with a dynamic-group particle swarm optimization (DGPSO) algorithm is proposed to provide WFB control and obstacle avoidance for mobile robots. In the WFB learning process, the input signal of a controller is the distance between the wall and the sonar sensors, and its output signal is the speed of two wheels of a mobile robot. A fitness function, which operates on the total distance traveled by the mobile robot, distance from the side wall, angle to the side wall, and moving speed, evaluates the WFB performance of the mobile robot. In addition, an escape mechanism is proposed to avoid a dead cycle. Experimental results reveal that the proposed DGPSO is superior to other methods in WFB and navigation control.

Magnetotransport Measurements on an AlGaN/GaN Two-Dimensional Electron System

Jyun-Ying Lin,C.-T. Liang,전창민,D.~H. Youn,김길호,H. Park,백정민,Jing-Han Chen,이종람,Y. F. Chen 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.3

We report on the transport properties of an AlGaN/GaN two-dimensional electron system in the presence of a perpendicular magnetic field B. At low magnetic fields, the measured longitudinal resistivity xx shows a B2 dependence at various temperatures. This eect can be ascribed to electron-electron interaction eects in a weakly disordered electron system. At high magnetic fields, there is a temperature-independent point in xx at the critical magnetic field Bc. We find that at this crossing point, the Hall-resistivity xy is approximately equal to xx. By analyzing the amplitude of the observed Shubnikov-de Hass oscillations at high fields, we find that at the crossing point, µqB = 0.17 < 1, where µq is the quantum mobility. Within the Drude-Boltzman theory, µq should be approximately equal to µ. The fact that µq < µ could be due to a high-field localization eect which gives rise to the formation of a quantum Hall liquid-like state because xx increases with increasing temperature for B > Bc.

Navigating the U.S. TESOL Programs : A Case Study of Four Korean Ph. D. Teacher Candidates

Jyun Bang 한국언어과학회 2011 한국언어과학회 학술대회 Vol.2011 No.08

Synthesis of Mainchain-type Polyesters by Atom Transfer Radical Polyaddition

Jyun-Ci LIAO,Ya-An HSIEH,Yu-Min HAN,Chih-Feng HUANG 한국고분자학회 2016 한국고분자학회 학술대회 연구논문 초록집 Vol.41 No.2

Upregulation of FcγRIIB by resveratrol via NF-κB activation reduces B-cell numbers and ameliorates lupus

Jyun-Pei Jhou,Se-Jie Chen,Ho-Yin Huang,Wan-Wan Lin,Duen-Yi Huang,Shiang-Jong Tzeng 생화학분자생물학회 2017 Experimental and molecular medicine Vol.49 No.-

Resveratrol, an anti-inflammatory agent, can inhibit pro-inflammatory mediators by activating Sirt1, which is a class III histone deacetylase. However, whether resveratrol can regulate inhibitory or anti-inflammatory molecules has been less studied. FcγRIIB, a receptor for IgG, is an essential inhibitory receptor of B cells for blocking B-cell receptor-mediated activation and for directly inducing apoptosis of B cells. Because mice deficient in either Sirt1 or FcγRIIB develop lupus-like diseases, we investigated whether resveratrol can alleviate lupus through FcγRIIB. We found that resveratrol enhanced the expression of FcγRIIB in B cells, resulting in a marked depletion of plasma cells in the spleen and notably in the bone marrow, thereby decreasing serum autoantibody titers in MRL/lpr mice. The upregulation of FcγRIIB by resveratrol involved an increase of Sirt1 protein and deacetylation of p65 NF-κB (K310). Moreover, increased binding of phosphor-p65 NF-κB (S536) but decreased association of acetylated p65 NF-κB (K310) and phosphor-p65 NF-κB (S468) to the − 480 promoter region of Fcgr2b gene was responsible for the resveratrol-mediated enhancement of FcγRIIB gene transcription. Consequently, B cells, especially plasma cells, were considerably reduced in MRL/lpr mice, leading to improvement of nephritis and prolonged survival. Taken together, we provide evidence that pharmacological upregulation of FcγRIIB expression in B cells via resveratrol can selectively reduce B cells, decrease serum autoantibodies and ameliorate lupus nephritis. Our findings lead us to propose FcγRIIB as a new target for therapeutic exploitation, particularly for lupus patients whose FcγRIIB expression levels in B cells are downregulated.

Differences in Metacognitive Awareness of Reading Strategy Use in English Test-typed Text Reading between Gifted English Language Learners and General Middle School Learners

Jyun Bang(방준) 한국콘텐츠학회 2020 한국콘텐츠학회논문지 Vol.20 No.1

본 연구의 목적은 영어 영재 학생들과 일반 중학생의 영어 평가 지문을 읽는 동안 메타인지 읽기전략사용의 차이점을 알아보고자 하는데 있다. 이를 위해, C시의 영어 영재 74명과 일반 중학생 90명을 대상으로 연구를 실시하였다. 두 그룹의 연구 대상자들의 메타인지 읽기전략을 살펴보기 위해 학기 말에 두 연구대상자들에게 MARSI 설문지를 배포하여 작성하게 하였다. 연구 대상자들의 메타인지 읽기전략의 차이점을 분석하기 위해 빈도 분석과 t-검정을 실시하였다. 그 결과, 일반적으로 영어 영재 학생들과 일반 중학생들이 영어 평가 지문을 읽는 동안의 메타인지 읽기전략 사용에는 차이를 보였다. 다시 말해, 영어 영재 학생들이 일반 중학생들에 비해 영어 평가 지문 읽기에서 더 자주 메타인지 읽기전략을 사용하는 것으로 나타났다. 개별 전략에 대해 말하자면, 영어 영재 학생들이 일반 중학생들에 비해 총체적 전략과 문제해결 전략을 더 자주 사용하는 것으로 나타났다. 하지만, 두 그룹의 연구대상자들은 지원전략의 사용에서는 통계적으로 유의미한 차이를 보이지는 않았다. 이 연구 결과를 바탕으로 본 연구는 영어 영재 학생들과 일반 중학생을 위한 효과적인 영어 읽기 지도에 대한 교육적인 시사점을 제공할 것이다. The purpose of this study was to explore the differences of the metacognitive awareness of reading strategies which gifted English language learners (GELLs) and general middle school learners (GMSLs) used while reading English test-typed texts. 74 GELLs in a gifted program of C city and 90 GMSLs in the southern part of C city participated in this study. The MARSI questionnaire was administered to the GELLs and GMSLs at the end of the semester. Frequency and t-test were used to examine the differences in metacognitive awareness of reading strategy use between GELLs and GSMLs when reading the English test-typed texts. Based on the analysis, the study discovered that GELLs were likely to use metacognitive awareness of reading strategies more frequently than GMSLs. Also, GELLs tended to use more global and problem-solving strategies than GMSLs. However, there is no significant difference in support strategy use between the two groups. In conclusion, the study suggests pedagogical implications for GELLs and GMSLs’ effective English reading.