외부에서 본 신라사

구효선 국제고려학회 서울지회 2005 국제고려학회 서울지회 논문집 Vol.5 No.-

전문비서직에 대한 이대 비서학과 학부학생들의 의식구

구효선,김경화,윤혜정,이지연,정은희,강은정,김윤희,신해정 이화여자대학교 법정대학 비서학과 1997 비서학연구 Vol.- No.17

衣冠制를 통해 본 중고기 貴族의 양상

구효선 동국대학교 WISE(와이즈)캠퍼스 신라문화연구소 2009 新羅文化 Vol.34 No.-

Silla that get a footing in Sarogook, Kyungju basin is formed through subjecting neighbored small country. Golpum system of Silla that objected the Wanggyungin(王京人) came into being. It become the standard of regulation in every field. Especially how one has government post is not only means ons’s social position but only function hierarchy of government official. This means grade about political, social and economical privilege. Therefore it would be generally to say that Silla society is Golpum aristocracy. This example is showed at two points. One is that Seol Gye-Doo(薛罽頭) lament his limits about Golpum. Another is showed at Xin Tang Shu that Relatives(親屬) is prior to select government official. Namely formation of Silla’s noble is importantly functioned by distinguished family and maintenance of political position. This political position is a grade of official rank. The hierarchy of Silla noble is understand by Attire system regulations. It is established in 520, Beopheung King(法興王) period. The clothing of government official is divided by purple, celadon green, blue and yellow. The government official who has grade from Taedaegakgan(太大角干) to Geupchan(級飡) wear a mace. Therefore the government official who has grade from Taedaegakgan(太大角干) to Geupchan(級飡) distinguish under Geupchan(級飡) from political and economical privilege. Also the hierarchy of government official is departmentalized by regulations of coronet. In case of coronet, Japchan(迊飡) and Pajinchan(波珍飡) wear different coronet. The Japchan and Pajinchan have interruption of a social position.

6~8세기 신라 재상의 성격

구효선(Koo Hyo-sun) 고려사학회 2004 한국사학보 Vol.- No.16

폴리프로필렌/에틸렌-옥텐 공중합체 블렌드의 기계적 성질 및 웰드라인 물성에 미치는 폴리프로필렌-옥텐 공중합체의 영향에 관한 연구

구효선 ( Hyo Seon Koo ),손영곤 ( Young Gon Son ) 한국고무학회 2011 엘라스토머 및 콤포지트 Vol.46 No.3

이 연구에서는 메탈로센 (metallocene) 촉매로 중합된 에틸렌-옥텐 공중합체를 충격보강제로 사용한 복합폴리프로필렌 (PP)에 상용화제로 프로필렌-옥텐 공중합체의 영향에 관하여 조사하였다. 사용된 프로필렌-옥텐 공중합체는 실험실에서 메탈로센 촉매를 사용하여 중합하였다. 상용화제가 첨가되지 않은 복합 PP의 경우 웰드라인에서 기계적 물성이 매우 낮았는데 상용화제의 첨가에 따라 웰드라인의 기계적 강도가 현저히 증가하였다. 그러나 상용화제가 첨가된 복합 PP라도 웰드라인이 없는 시편에서는 물성개선이 크지 않는 것으로 관찰되었는데, 이는 제조된 상용화제의 분자량이 매우 낮기 때문이었다. 적절한 조건에서 분자량이 높은 프로필렌 옥텐 공중합체를 제조한다면 상용화제로서 효과가 클 것으로 기대할 수 있었다. Effect of poly(propylene-co-octene) as a compatibilizer in toughened polypropylene/ poly(ethylene-co-octene) (EOC) was investigated. The EOCs used were metallocene catalyzed commercial linear low density polyethylene and they are elastomeric materials. The poly(propylene-co-octene) was synthesized by metallocene catalyst in our laboratory to be used as a compatibilizer in PP/EOC blends. PP/EOC blends without compatibilizer shows very low mechanical properties in specimens with weldlines while incorporation of a compatibilizer significantly increases the mechanical properties of specimens with weldlines. However, compatibilized PP/EOC blends does not show increased impact property in a weldline free specimen and it is attributed to low molecular weight of the poly(propylene-co-octene) synthesized in present study. It is expected that the poly(propylene-co-octene) having increased molecular weight provides very good performance as an effective compatibilizer in toughened polypropylene/EOC blends.

신라 중대 대일외교와 재상

구효선(Koo, Hyo-Sun) 백산학회 2006 白山學報 Vol.- No.75

The three factors of economy, politics and culture in a society regulate mutual relation in development process. The fastest of all the factors in change is economic factor that caused by diplomacy. The diplomacy of Silla in 7~8 century become complex. At that time, diplomacy of Silla is changed suddenly because of three kingdoms’ unified war, war between Silla and T’ang and establishment of Balhae. Especially Silla become estranged from T’ang because of war, Silla make progress economic exchange and politic stability through improvement of relation with Japan. The relation of other country is a right of royal own, but it is carried out by the nobility. They take charge of the affair that deliver politic message by sovereign’s message and word of mouth. As Silla’s diplomacy with Japan is seen at word of mouth more then sovereign’s message, ties between the two countries is carried out for actual profit. Diplomatic relation is exchange of human and things at once. A diplomatic mission present to the king things of Kooksin(國信) and Byeolgong(別貢). Kooksin is usual tributary good, Byeolgong is a special present which offered to royal family or prime ministers. Especially Byeolhyunmool(別獻物) is a strategic materials for successful diplomacy, Japan offered cotton, ship and flag to king of Silla, the noble like Kim yu-sin and Kim soon-jeong. But after King Seongdeok period that reopened exchange with T’ang, diplomacy of mission is made private exchange except politic purpose. This change is influenced by the South Sea trade of T’ang. In other words, Silla obtained peacock and spices of India and Indonesia through South Sea trade, they is given to Japan. This fact shows pride of Silla related wide-ranging trade and transformation of mental action influenced by China. Diplomatic action accompany guest treating as well as economic action. It is accomplished by organization under authority of king. In case of Silla, Yeonggakjeon(領客典) is in charge of diplomacy related guest reception, Waejeon(倭典) under Naeseong(內省) is understood in the handicraft authorities that is need at relations with Japan. In case of Japan, gained goods through diplomacy is kept in the coffers of the State like Naejangryo(內藏寮) and Hoogung(後宮) and sold at palace market(宮市). But in case of Silla, historical materials about this fact is not found. Merely, It is supposed that Naeseong played a leading role in giving ceremony to the noble.

신라의 경계(境界)와 제사

구효선 ( Hyo Sun Koo ) 韓國古代學會 2008 先史와 古代 Vol.28 No.-

탄소필러와 에스테르계 바인더가 전도성 페이스트의 반응성 및 PET 필름과의 접착특성에 미치는 영향

심창업,구효선,김연철 한국공업화학회 2022 공업화학 Vol.33 No.4

It is very important to secure the adhesion durability between the base film and the conductive paste for the development of a sensor for detecting hazardous chemicals. In this study, an ester binder was used to improve the adhesive properties which can be a problem when applying the sensor to the cross cut 0B or 1B grade. This problem was found while evaluating the adhesive properties by coating the polyaniline/graphene nano plate (GNP) paste on the polyethylene terephthalate (PET) film. When 10 wt% or more of the ester-based binder was added, the cross cut grade to which the sensor can be applied was 3B or higher. It was confirmed that the excessive addition of the binder may affect the electrical properties of the conductive paste and actually decrease the reactivity to sulfuric acid. To improve the electrical property, a carbon black (CB) content was varied resulting in the optimum electrical property observed at 2 wt% of CB.

그래핀 복합소재를 적용한 유해화학물질 실시간 감지 센서 연구

심창업,구효선,김연철 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.1

2P-4 나일론66/탄소필러 복합체 제조방법에 따른 물성연구

신경민,심창업,구효선,이정석,김연철 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1

전자파 차폐소재의 경우 높은 차폐성능을 갖는 금속이 코팅된 탄소섬유가 사용되고 있으며, 복합체 또는 시편의 제조방법이 물성에 영향을 미친다. 본 연구에서는 나일론66/탄소필러 복합재료를 마스터배치 적용 유무에 따라 제조하였고, 전기적 특성, 흐름성 및 기계적 물성 등을 비교 평가하였으며, 탄소필러 종류로는 카본블랙(CB), 다중벽탄소나노튜브(MWCNT), 니켈코팅 탄소섬유(NI-CF), 사용하였다. 또한 고 함량의 CF 첨가로 이방성이 존재하여 시편을 가열프레스와 시편용 사출기를 이용하여 제조한 후 물성을 평가하였다. 복합체의 흐름성은 동적유변학측정기와 용융흐름지수시험기를 사용하여 측정하였으며, 기계적 물성은 UTM을 이용하여 측정하였다. 표면저항과 전자파 차폐 성능을 측정하여 전기적 특성을 조사한 후 SEM을 이용한 형태학적 특성과 비교하여 필러 분산과 전기적 및 전자파 차폐 특성 사이의 상관관계를 분석하였다.