Microstrip Array 안테나의 최적설계에 관한연구

하천수,김종천 金烏工科大學校 1992 論文集 Vol.13 No.-

In this paper, An improved equivalent transmission line model for the rectangular microstrip patch antenna was presented and applied to the optimum design program. Rectangular microstrip patch array antenna was designed and fabricated by using improved equivalent transmission line model and measured results are compared with computed values.

考古資料를 통해 본 古代 韓半島와 日本列島의 相互作用

朴天秀 한국고대사학회 2002 韓國古代史硏究 Vol.27 No.-

Since the prehistoric age, the relation partner of Guyaguk in the Gimhae was the Guju force, which had traditionally played a role as an international gateway of the Japanese archipelago. In the Geumgwangaya period, its gateway was replaced by the Ginai force. The Yangdong - ri force was declined and the Daeseong dong force emerged in such a process. Simultaneously, in the Japanese archipelago the north Yamato force and the Gawajji force rose into power, in the middle of the weakening of the force, based on the southeast region of the Nara basin. As shown in the above, we can know that the relation between the Korean peninsula and the Japanese archipelago played an important role in the shift of power in political regimes of the Geumgwangaya force and the Ginai force. Goryeong - based Daegaya achieved epochal development in the late fifth century. That is, Daegaya expanded its force ranging from the Hwanggang hydrosphere to the Seomjingang and Geumgang hydrospheres. Besides, in this period, two facts are noted: One is that some forces relied on the relation with Geumgwangaya in Gimhae were decayed. Another is that those big chiefs who were connected with the Daegaya force appeared in many regions of Japan. These facts are supported by the prestigious artifacts of Daegaya style, which were found in the leading chiefs' tombs in the Japanese archipelago. Daegaya occupied a leading position in the relation with Wae, and this became motive power, which enabled it to dominate Geumgwangaya, Aragaya and Sogaya and to grow as a central state in the Gaya region. Before and after 500, however, the importing country of material culture in the Japanese archipelago changed from Daegaya to Baekje, and hence Wae - originated material culture has extensively been found in the Yeongsanggang valley, which had a close relation to Baekje. The decadence in the relation with Wae was acted on as an important factor, which led Daegaya to decline and eventually, collapse. In archeological data, it is assumed that the full - scale trade between Baekje and Wae became motive power for the appearance of the Gyeitai dynasty, based on the fact that the trade began before and after sixth century. The Gyeitai force gained predominance in Ginai by attempting to be different from the Gawajji force. This force excluded the Gaya force, which had traditionally had a close relation with the Japan archipelago, and introduced advanced material culture from Baekje. It is believed that before and after this period, people buried in the keyhole - shaped tumuli in Jeollanam - do and Jeollabuk - do were members of the Wae descent group, which was dispatched by the Baekje kingship so as to dominate and restrain native forces and to capture Daegaya, given the construction period, distribution scope and funeral objects of the tumuli. After the collapse of Hanseong, Baekje under the temporary downfall of its control organization received military help from Wae in order to rule over the south region and to capture Daegaya. It is inferred that, as a consideration of such help, Baekje transmitted Wae material culture necessary to national consolidation.

高速 데이타 傳送을 위한 MFSK에 關한 硏究

河千洙 金烏工科大學校 1990 論文集 Vol.11 No.-

The data communication using the existing public switched telephone network(PSTN)has been perfomed its transmission by modulator & demodulator(MODEM), however, at present the maximum velocity of the MODEM is limited up to 9600bps. this limitation caused, when a lot of data were transmitted many kind of demerit such as time and cost.etc. In this paper, modified frequency shift keying(MFSK)method was proplsed which can make high speed data transmission at 22400bps rather than 9600bps. If this method is applied to existing still picture, and also to transmit a qusis-animated picture. The theoretical analysis was first studied on the system of MFSK method, then its experiments on the implementation for the design fo the transmitting and receiving system manufactured in the laboratory. Moreover, test resulting was good agree with computer simulation.

敎育大學 敎育課程 改善 硏究

朴天煥 釜山敎育大學校 1994 부산교육대학 논문집 Vol.30 No.1

朝鮮 前期 學堂敎育의 敎科運營에 대한 硏究

申千湜 명지대학교 인문과학연구소 1989 인문과학연구논총 Vol.6 No.-

牧隱家學의 成立과 理念 : 種德·種學·種善의 生涯와 活動을 中心으로

申千湜 명지대학교 인문과학연구소 2003 인문과학연구논총 Vol.25 No.-

鄭夢周의 學問과 敎育思想

申千湜 명지대학교 인문과학연구소 1998 인문과학연구논총 Vol.18 No.-

朝鮮前期 鄕校의 設立과 運營에 對한 硏究

신천식 명지대학교 인문과학연구소 1997 인문과학연구논총 Vol.16 No.-

考古學을 통해 본 大伽倻史

朴天秀 慶北大學校 退溪硏究所 2008 퇴계학과 유교문화 Vol.42 No.-

5세기 후반 대가야는 토기, 위신재, 묘제와 같은 고고자료의 분포로 볼 때, 고령을 중심으로 황강수계, 남강상류역, 섬진강수계와 남해안에 걸치는 가야사상의 최대 판도를 형성하였다. 대가야 왕권은 왕묘역인 고령 지산동고분군의 조영 과정으로 볼 때 이전 시기에는 複數의 집단에 의한 共立이었으나, 5세기 말 지산동44호분단계에서 특정 수장 계열에 고정되어 세습화되고 전제왕권을 확립한 것으로 추정된다. 이러한 전제왕권의 배후에는 고령 지산동고분군, 합천 옥전고분군의 수장묘 주변에 조영된 무기의 소유가 탁월한 배총들이 상징하듯이 민의 무장과는 구별되는 군사조직이 중앙 수장의 주변에 권력기구로서 존재한 것으로 추정된다. 대가야 왕권은 이와 같은 군사력과 토기, 위신재의 생산과 유통에서 추정되는 물자유통기구를 통하여, 그 권역 내 각 지역의 수장층을 장악하고 편제한 것으로 파악된다. 대가야는 6세기 초를 전후하여 고령분지, 합천지역 및 의령지역을 포함한 낙동강 중류역 서안을 따라 대가야식 산성이 연계하여 집중 조영된 것으로 볼 때, 그 권역 내의 민을 동원할 수 있는 역역 체제를 확립한 것으로 본다. 대가야는 남강상류역, 금강상류역 섬진강 하구의 하동지역, 그리고 여수, 순천, 광양지역 즉 소위 任那四縣을 확보함으로써, 아라가야와 소가야의 내륙회랑인 남강로뿐만 아니라 양 세력이 활동하던 남해안로를 차단할 수 있게 되어 가야 후기의 중심국으로 대두한다. 더욱이 대가야는 전략적인 요충인 任那四縣을 확보하고 남해안의 제해권을 장악함으로써, 백제와 왜의 교통뿐만 아니라 왜의 중국 교통에도 일정한 영향력을 행사할 수 있게 된다. 그래서 대가야는 對 일본열도 교역에서 신라, 백제와의 경쟁에서 우위에 설 수 있게 되었다. 대가야는 종래 내륙의 후진국으로만 파악되어 왔으나, 이와 같이 내륙에서 생산한 철과 금·금동 제품을 바다를 통하여 일본열도 전역에 수출한 大 해상교역 국가였다. 479년 대가야에 의한 중국 南齊로의 독자적인 遣使는 남해안을 통한 이와 같은 해상활동을 웅변하는 것이다. 대가야는 당시 백제 영역에 비견되는 대 권역을 형성하고 그 내부를 통제할 수 있는 군사권, 외교권, 역역동원 체제를 갖춘 점에서 초기국가단계에 도달한 것으로 파악된다. It could be assume that Daegaya formed her great dominion in the whole history of Gaya at the later half of the 5th century, centering around Go-ryeong over the basin of Hwang river, the upper of Nam river, and the south seashore through the analyzing distribution of archaeoloaical data like pottery, prestige goods, and tombs. The kings of Daegaya took the regal position by agreement of several groups in the prior phase, based on the process of construction of the Jisan-dong tombs, Go-ryeong, the sphere for the royal tombs. But they took heredity within a particular group and established a despotic royal authority at the phase of Jisan-dong no.44 tomb, the end of the 5th century. In the behind of establishing despotic royal authority, the constant system for the military as a power organization seems to be formed at that time, based on the existence of subordinated tombs which have prominent quantity of weapons. Daegaya seemed to take the leader groups of each region under her dominance and control through the military force and the distribution organization for pottery, prestige goods. Based on the fact that Dagaya fortresses were constructed densely to be connected with each other along the westside of Nak-dong river including Go-ryeong, Hap-cheon, and Ui-ryeong. Daegaya seems to had established the mobilization system for the labour power which could mobilize the people of each region. Daegaya became centre state of latter Gaya as intercepting the Nam river, corridor route of Aragaya and Sogaya and the south sea by means of taking the upper basin of Nam river and of Gum river, Ha-dong, Yeo-soo, Sun-cheon, and Gwang-yang so called. Imnasahyeon(任那四縣) under her own dominance. As taking Imnasahyeon(任那四縣), a point of strategic importance, under control and seizing the management for south sea, Daegaya influenced the interaction between Wa(倭) and china as well as between Baekje and Wa(倭). Therefore Daegaya could hold a dominant position in trade with japanese archipelago between Silla and Baekje. Daegaya, which had been thought as a less advanced state in the prior study was great seaborne state which exported iron and golden-gilt bronze crafts made from inland area to the whole area of japanese archipelago through the sea. Her own accrediting an ambassador to Namje(南齊) of Daegaya shows these aspects of activities on the south sea. In conclusion, it could be assumed that Daegaya had reached the phase of early state ; She was being formed her own territory which is compared with Baekje's, control power toward inside of state like rights of military, diplomacy, and mobilization system for the labour power.

圓偏波 변환장치에 關한 硏究

河千洙 國立金烏工科大學校附設生産技術硏究所 1986 産業技術開發硏究 Vol.2 No.-

직선편파에서 원편파로 바꾸는 편파변환장치는 원형도파관내에 유전체판을 삽입하거나 금속물체나 핀을 삽입하여 편파를 변환하는 장치가 개발되어왔다. 본 논문에서는 spread-squeeze도파관을 사용하여 직선편파에서 원편파, 또는 그 역으로 변환하는 도파관 편파 변환기가 연구되었다. X-밴드에서 모드 변성기와 혼 안테나 등을 사용하여 실험 측정한 결과는 이론과 매우 잘 일치하였다. A convert between linear and circular polarization has been designed in circular waveguide by the use of dielectric vanes, metal ridges or pins. In this paper was studied waveguide polarizer for converting circularly polarized wave to linear by the use of spread-squeeze waveguide. Experimental results of tests carried out at X-Band, using mode changers and horn antenna, well agree the theory.