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PAN 그라프트 공중함 나트륨 황산 셀룰로오스계 고흡수성 수지의 합성과 성질(III)-고흡수성 수지의 여러가지 성질-
송경근,윤기종,고석원,Song, Gyeong-Geun,Yun, Gi-Jong,Go, Seok-Won 한국섬유공학회 1994 한국섬유공학회지 Vol.31 No.11
Various properties of superabsorbents(HCSPAH) from sodium cellulose sulfate were analyzed. Saline absorbency of HCSPAN in multivalent salt solutions was lower than that in monovalent salt solution of same ionic strength. This appears to be due to the formation of completes between the metal ion and the polyion. Phase transitions of HCSPAN gels were caused by changes in the composition of the polar organic solvent/water mixtures. As the dieleciric constants of solvents were increased, gel collapse occurred at higher solvent concentrations. From DSC measurement, the absorbed water was found to exist as both free and bound water. When water content was less than 0.71g-water/g-dry HCSPAH. only bound water existed.
PAN 그라프트 공중합 나트륨 황산 셀룰로오스계 고흡수성 수지의 합성과 성질(II)-고흡수성 수지의 흡수속도-
송경근,윤기종,고석원,Song, Gyeong-Geun,Yun, Gi-Jong,Go, Seok-Won 한국섬유공학회 1994 한국섬유공학회지 Vol.31 No.10
The swelling kinetics of HCSPAN was analyzed by the demand wettability(DW) method. It was influenced by the complex action of crosslinking density, ionic unit content and soluble polynler content related to alkaline hydrolysis conditions such as alkaline hydrolysis temperature. NaOH concentration and alkaline hydrolysis time. And it was also infiueneced by gel blocking which was related with the particle size. The moisture regain of HCSPAN was not high at even high relative humidity.
Decabromodiphenyl Oxide와 산화안티몬을 이용한 폴리에스테르 직물의 방염가공
송경근,이의소,고석원,Song, Gyeong-Geun,Lee, Ui-So,Go, Seok-Won 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.7
Polyester fabrics were treated with decabromodiphenyl oxide and antimony trioxide by use of binder. The synergistic interactions of bromine and antimony were studied. The LOI values increased with the content of DBDPO or antimony trioxide in fabrics, but flame retardancy was not satisfactory when they were used independently. On the contrary, when a mixture of DBDPO and antimony trioxide was used, the synergistic effects were remarkable and the maximum LOI value was obtained at 715 Br/sb ratio in treated fabrics. When the Br contents in the fabrics of 713 Br/sb ratio were more than 8.5% , flame retardancy was also sustained after 5 laundering cycles. Flame retardancy of these fabrics exhibited the gas-phase mechanism.
송경근(Song,Kyung-Keun) 한국중동학회 2016 韓國 中東 學會 論叢 Vol.36 No.3
Ibn Khaldun is a great historian who wrote book called Muqaddimah in 14th century. In the book, he showed the continuous rise and fall of dynasty, and political change. He argued, Asabiyah played the most significant role at that time. It brought social solidarity, with group unity and cohesion. This was the power to achieve the change of authority. The life of people was divided into two types, Umran badawi and Umran hadari. Umran badawi built the nation, based on the power of Asabiyah, and this evolved into Umran hadari. The nation will be weakened and fallen after its foundation. Because Asabiyah will be corrupted and abandoned. The religion could be strengthen Asabiyah. However, the religion could have not strengthen that much. Ibn Khaldun believed, Asabiyah existed before the appearance of Islam.
송경근(Song Kyung Keun) 韓國中東學會 2015 韓國 中東 學會 論叢 Vol.36 No.1
On July 1st, 1798, Napoleon and French army landed at Alexandria. Some western scholars viewed the expedition as war of aggression, yet some Egyptian scholars viewed as the starting point of modernization, and appraised it positively. The relative importance between the army/weapons and scholars/science is still remained to be discussed. However, one thing for sure, the expedition marked as the fundamental turning point in the history of Egypt. This provided opportunity to structural changes in Egypt, such as, politics, economy, society, and culture. In other words, it has transformed the underdeveloped state of Egypt into an improved, modernized nation. The France weapon and printing press demonstrated the military power and the cultural advances together. It is not easy to distinguish the essential nature of the invasion between the two. Nevertheless, the one important factor that distinguishes Napoleon's invasion from other aggressions is the modernization of government administration and cultural advances. Napoleon's military expedition of Egypt was war of invasion. From a military perspective, it was absolute failure. However, the short-lived French occupation of Egypt began a long-term French effect on Egypt. The French occupation became the main catalyst for the change, yet it became the path where Egypt can never come back.
1798년(나폴레옹 침입) 이후 현대 이집트 기독교도의 상황에 대한 연구 -콥트를 중심으로-
송경근(Song, Kyung-Keun) 한국중동학회 2017 韓國 中東 學會 論叢 Vol.37 No.3
This paper explores the history, present and future of Egyptian Christians in modern Egypt. Most Egyptian Christians are called Copts, referring to native Christians in Egypt. A major part of this paper is focused on Copts. This paper is divided into three parts according to modern Egyptian history: monarchy era, republican era, and the recent period after the January 25, 2011 revolution. After Napoleon invaded Egypt in 1798, Western systems and culture flew into Egypt. This change in the society stimulated the Christians in the Islam society, which made them dissatisfied with the role of ‘Dhimmi’ who were regarded as second-class citizens. The Christians turned into a part of the leading force in the transformation of Egyptian society with Muslims and were equally treated as Muslims but at a superficial level. Nevertheless, Egyptian Christians have changed a lot according to who the ruler is or what the political system is. This paper analyzes the situation of modern Egyptian Christians according to the political changes including the history of Christianity in Egypt and the relationship between Egyptian government and Egyptian Christianity. The purpose of this paper is to see their current situation and future among Muslims who are the majority in Egyptian society. The conclusion of this paper is that, although the current situation of Egyptian Christians is not favorable, they will adapt according to variously changing situations and survive, as they had existed for a long time as a minority group.
송경근(Song, Kyung-Keun) 한국중동학회 2017 韓國 中東 學會 論叢 Vol.38 No.2
This paper begins with the British occupation of Egypt and continued until the end of the 1919 revolution. It deals the Egyptian occupation of Britain and the resurgence and growth of Egyptian nationalism, the Egypt and British rule in the First World War, the 1919 Revolution and the Egyptian independence struggle, the Egyptian independence and the result of the 1919 Revolution, the comparison of the Egyptian 1919 Revolution with Korean Samil Movement. From the course of this study, I will identify the traits of the 1919 revolution, which is the purpose of this paper, and present the examples of how past colonial nations resisted the colonial rule of the empires as well. In this way, the paper will clarify an important part of modern history in the Middle East. This paper will precisely exhibit the similarities and differences in comparison between the 1919 Revolution in Egypt and Korean Samil Movement which will help to grasp the 1919 Revolution from our standpoint.
모듈러 형태의 재구성 가능형 마이크로 공작기계의 설계와 제작
송경근(K. G. Song),노민석(M. S. Rho),조인봉(I. B. Jo),이상기(S. K. Lee),정진영(J. Y. Jung),장성현(S. H. Jang),최영휴(Y. H. Choi) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5
In this study, we designed a modular reconfigurable micro machine tool (MRmMT), which is reconfigurable from a milling machine to a lathe. Our machine tool consists of several module units; bed, column, spindle, slide units, tail stock, and controller. The reconfigurable machine tool developed in this study, demonstrated good machining abilities as a 3-axis milling machine as well as a turning lathe.
모듈러 형태의 재구성 가능형 마이크로 공작기계의 설계와 제작
송경근(K. G. Song),노민석(M. S. Rho),조인봉(I. B. Jo),이상기(S. K. Lee),정진영(J. Y. Jung),장성현(S. H. Jang),최영휴(Y. H. Choi) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
In this study, we designed a modular reconfigurable micro machine tool (MRmMT), which is reconfigurable from a milling machine to a lathe. Our machine tool consists of several module units; bed, column, spindle, slide units, tail stock, and controller. The reconfigurable machine tool developed in this study, demonstrated good machining abilities as a 3-axis milling machine as well as a turning lathe.