AlOOH로부터 AlN분말의 합성

이재범,김선태,Lee, Jae-Bum,Kim, Seon-Tai 한국재료학회 2006 한국재료학회지 Vol.16 No.12

In this study, we report a method to synthesize the aluminum nitride (AlN) powders from aluminum oxyhydroxide (AlOOH). AlOOH powders were prepared from the aluminum hydroxide ($Al(OH)_3$) by heattreatment at the reaction temperature of $350^{\circ}C$. Simple heat treatment of AlOOH in the flow of $NH_3$ gas leads to the formation of hexagonal AlN powders through intermediate conversion of ${\delta}-,\;{\gamma}-$ and ${\alpha}-Al_2O_3$. The FTIR transmission spectra show a broad peak related to Al-N bonds centered around 690 $cm^{-1}$ confirming the presence of AlN. The major peaks in Raman spectra were observed in 250 $cm^{-1}$ and 659 $cm^{-1}$. From the results, synthesized powders from the AlOOH powders were confirmed AlN powders.

GaOOH 선구체의 스핀코팅에 의한 GaN 박막의 성장

이재범,김선태,Lee, Jae-Bum,Kim, Seon-Tai 한국재료학회 2007 한국재료학회지 Vol.17 No.1

GaN thin fan were grown by spin coated colloidal GaOOH precursor. Polycrystalline GaNs with crystalline size of $10{\sim}100nm$ were grown on $SiO_2$ substrate. The shape of crystallite above $900^{\circ}C$ had the hexagonal plate and column type. X-ray diffraction patterns for them correspond to those of the hexagonal wurtzite GaN. With increasing droplets. i.e, thickness of deposited layers, XRD intensity increased. PL (photoluminescence) spectrum consisted with an weak near band-edge emission at 3.45 eV and a broad donor-acceptor emission band at 3.32 eV. From the low temperature PL measurement on GaN grown at $800^{\circ}C$ that the shallow donor-acceptor recombination induced emission was more intense than the near band-edge excitonic emission.

Vapor Transport Epitaxy에 의한 GaN의 성장과 특성

이재범,김선태,Lee, Jae-Bum,Kim, Seon-Tai 한국재료학회 2006 한국재료학회지 Vol.16 No.8

Highly c-axis oriented poly-crystalline GaN with a dimension of $1{\sim}3\;{\mu}m$ was deposited on $c-Al_2O_3$ substrate by vapor transport epitaxy (VTE) method at the temperature range of $900{\sim}1150^{\circ}C$. XRD intensities from (00'2) plane of grown GaNs were increased with reaction conditions which indicate the improvement of the crystal quality. In the PL spectra measured at 10 K, the spectrum composed with the neutral-donor bound exciton-related emission at 3.47 eV, crystal defect-related emission band at 3.42 eV and with its phonon replicas. The fact that intensity of $I_2$ were increased and FWHM were decreased with growth conditions means that the quality of GaN crystals were improved. With this simple VTE technology, we confirm that the GaNs were simply deposited on sapphire substrate and crystal quality related to optical properties of GaN grown by VTE were relatively good. PL emission without deep level emission in spite of polycrystalline structure can be applicable to the fabrication of large area and low cost optical devices using poly-GaN grown by VTE.

실버체육 지도자가 지각하는 노인 운동실천 공감대 형성방안

이재범(Jae Bum Lee),김용국(Yogn Kuk Kim) 한국사회체육학회 2014 한국사회체육학회지 Vol.0 No.56

This study tried to identify how the methods proposed by silver sports leaders became structuralized to construct a bond of sympathy on everyday sports of the elderly. To diagnose and validate the method to compose a bond of practice on exercise in the elderly, and thereby to maximize its utilization in policy, 372 silver sports administrator, silver sports professionals, professionals in physical education for the elderly, civil physical education leaders, and silver club leaders were selected as subjects. Samples were abstracted through open type questionnaires and responses were reviewed. Responses on open type questions regarding how to compose a bond of practice on sports for all of the elderly were classified and categorized according to content analysis process. From the content analysis total responses of 625 were identified. From them 27 factors and 1 other area were induced in the first classification (detailed areas), which were simplified to 17 factors in the second classification (theme area). In the third classification (general area) to generalize content analysis, 9 methods to compose a bond of sympathy were identified. Through materials collected here, 35 provisional scales were configured. Through exploratory factor analysis, 9 factors such as facility and space expansion factor, PR expansion factor, education reinforcement factor, goods supply factor, treatment improvement factor, perception change factor, governmental institution improvement factor, program development factor, and proactive service were found to be major factors. Such research results will provide useful information to compose a bond of practice on sports for all of the elderly and contribute to expand the base of sports for all of the elderly in our society.

대몽항전의 성격에 대하여

이재범(Lee, Jae-Bum) 백산학회 2004 白山學報 Vol.- No.70

For about 30 years, Koryo people had been fighting against the Mongols, who infringed upon Koryo Kingdom so as to build a world-wide big empire. Until recently, Koryo’s oppositional activities to the Mongolian invaders used to be interpreted as an event for the Korean people to display their national consciousness, even though they could not avoid surrendering themselves to the Mongols. And in other respect, this losing war esteemed to be a historical and nationalistic event for the Koryo people to consolidate their national identity, uniting forces of soldiers, governmental officials, and local civilians and strenuously struggling against the foreign enemies. One thing we should remember is that lots of class-struggles can be historically proved during these Mongol opposition war period. In this paper, I have analysed several examples of these sorts of class-struggling conflicts in the Koryo society. For these reasons, I argue that it is not absolutely true that all Koryo people had been untied to fight against Mongol aggressors. Another thing especially noted in this paper is that the change of attitude among the lower class towards the war against Mongols. Around the time of Mongol invasion, lots of lower people were engaged with civilian oppositional activities. This can be said to some sort of class struggle. Meeting the foreign invaders of Mongols, socially-low class people in Koryo changed their attitude the local powerful families, such as the Choe’s. With this result, powerful family could be cooperative with the lower class people. This change shows that lower people put the highest point to the protection of their local community against foreign powers. With these two major acpects, the struggle of Koryo people against the Mongols should be understood as a community-protection efforts, jointly carried out by Koryo people, mainly composed of governmental officials and local residents of lower class.

《화랑세기》 `이종욱본` 의 저자와 사료적 가치에 대하여

이재범(Lee, Jae-bum) 신라사학회 2009 新羅史學報 Vol.0 No.17

지체장애학생이 지각하는 사회적 지지가 건강관련 삶의 질에 미치는 영향

이재범(Jae Bum Lee),김용국(Yong Kuk Kim) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.39

The objective of this study is to explain the effects of social support perceived by students with physical disabilities on their health-related quality of life. For this, we examined differences in social support and health-related quality of life according to the detailed disability type of students with physical disabilities, and tested the multidimensional relations between the sub-factors of social support and health-related quality of life. The subjects of this study were students with physical disabilities at H University in K Province, and we collected the responses of 144 students aged over 20 using a rating scale whose psychometric validity had been tested. According to the results of MANOVA, social support and health-related quality of life in students with physical disabilities were different according to detailed disability type. In addition, the theoretical compatibility of the two variables was confirmed through a structural equation model. Furthermore, when the correlation between the two variables was analyzed through multiple regression analysis, the sub-factors showed high explanatory power for the sub-factors of health-related quality of life, that is, physical function, role limitations, and general health, excluding mental health. Based on these results, we discussed how to provide social support in order to enhance health-related quality of life in students with physical disabilities.

麗元聯合軍의 日本征伐과 『東方見聞錄』

李在範(Lee, Jae-Bum) 국방부 군사편찬연구소 2003 군사 Vol.- No.50

Landmark trials for hemorrhoids

이재범(Jae Bum Lee) 대한외과학회 2014 대한외과학회 학술대회 초록집 Vol.2014 No.11

고려 태조대의 대외정책

이재범(Lee, Jae-Bum) 백산학회 2003 白山學報 Vol.- No.67

King Taejo’s foreign policy to include Palhae descendents has been thought of as one of the excellent decisions in the Korean national history. The inclusion of Palhae into Koryo by the King has been recognized a historic event that Koryo had succeeded to Koguryo’s legitimacy. But we have no evidence that King Taejo thought that he had successfully derived Koguryo’s tradition. His positive cognition of Palhae seem to appear rather late in his government. In the beginning of his rule, Taejo preferred to maintain Kungye’s friendly foreign policy towards Khitan. This policy continued to be pursued after the fall of Palhae. About 938 A.D., Taejo changed his policy, from friendly to hostile, towards Khitan. By the coalition with the late Chin dynasty, Taejo wanted to conquer Khitan to save a king of Palhae, who was arrested as a captive there. The biggest reason for Taejo’s change of mind seems that he had highly esteemed the power of Palhae descendents. Around this time, more than 50,000 Palhae descendents immigrated into Koryo. Among them, lots of noble men were included, such as Dae Gwanghyun, prince of Palhae. Their influence was so great that King Taejo wanted to assimilate them by giving them various types of advantages, giving King’s family name, large estates, much salary, and so forth. With this policy of favour, Palhae descendents had increased their political and economic power in Koryo society. The power growth of Palhae descendents led an inevitable change of diplomatic policy in Koryo. With this abrupt change, the relations of Koryo with Khitan became worse and worse. In 942 A.D, there occurred a tragic incident, what is called the Manbugyo-bridge event; King Taejo ordered to hang the 50 camels, gifts from Khitan, upon the columns of the stone bridge, to be starved to death. This was an incident to symbolize that King Taejo’s anti-Khitan policy. Since then, after the bridge event onwards, Koryo kept on its hostile policy towards Khitan so that a war broke out in the late 10th century between the two nations.