정보사회와 청소년 : 기조연설 : 정보사회와 청소년

조정원 한국청소년문화연구소 1999 세미나 자료집 Vol.1996 No.-

메쉬 스크린을 이용한 충돌제트 열전달 제어에 관한 연구

조정원,이상준,Jo, Jeong-Won,Lee, Sang-Jun 대한기계학회 2001 大韓機械學會論文集B Vol.25 No.5

The local heat transfer of an axisymmetric submerged air jet impinging on a heated flat plate is investigated experimentally with the variation of mesh-screen solidity. The screen installed in front of the nozzle exit modifies the flow structure and local heat transfer characteristics. The mean velocity and turbulence intensity profiles of streamwise velocity component are measured using a hot-wire anemometry. The temperature distribution on the heated flat surface is measured with thermocouples. The smoke-wire flow visualization technique was employed to understand the near-field flow structure qualitatively for different mesh screens. Large-scale toroidal vortices and high turbulence intensity enhance the heat transfer rate in the stagnation region. For a higher solidity, turbulence intensity become higher which increases the local heat transfer at small nozzle-to-plate spacings such as L/D<6. The local and average Nusselt numbers of impinging jet from the $\sigma$(sub)s=0.83 screen at L/D=2 are about 5.6∼7.5% and 7.1% larger than those for the case of no screen, respectively. For the nozzle-to-plate spacings larger than 6, however, the turbulence intensities for all tested screens approach to an asymptotic curve and the mean velocity along the jet centerline decreases monotonically. As the nozzle-to-plat spacing increases for high solidity screens, the heat transfer rate decreases due to the reduction in turbulence intensity and jet momentum.

1LB-9 : cst장치를 이용한 슬러지 탈수 개선에 관한 연구

조정원,조준형 한국공업화학회 2003 한국공업화학회 연구논문 초록집 Vol.2003 No.-

시진핑 시대 중국의 혐한: 현황과 원인, 완화방안

조정원 중앙대학교 외국학연구소 2022 외국학연구 Vol.- No.59

Through a literature analysis and interviews with Chinese experts, this paper attempted to analyze the current status, and cause of China’s anti-Korean sentiments since the beginning of the Xi Jinping-centered Chinese Communist Party leadership in March 2013, and suggest ways to alleviate China’s anti-Korean behavior. In the 2000s, China’s feelings of hatred towards Korea became evident during the process of pointing out the problems of the Korean Wave content among the Chinese people who consume the Korean Wave content, and the Korean female short track speed skating players’ banner ceremony, “Baekdu Mountain is our territory,” which made some Chinese, who thought that the Baekdu Mountain was their own territory, feel uncomfortable on January 31, 2007. However, since the launch of the Xi Jinping-centered Chinese Communist Party leadership in March 2013, China’s anti-Korea movement has raised its status in the international community. It is related to the patriotism of Chinese educational institutions, nationalist sentiment, and superiority to China. To alleviate China’s anti-Korean phenomenon in the Xi Jinping era, it is necessary for the Korean and the Chinese governments, academia, businesses, and media to protect each other from antipathy and hatred through communication and reports based on objective facts. In particular, a legislation is needed to ban hate and antipathy-causing remarks in the Internet comments, since the comments on the Internet portals, communities, and media websites in China and South Korea are becoming a space for emotional arguments. In addition, it is necessary to continue exchanges and cooperation between Korea and China through video conferences, substantially improve management and treatment of Chinese students at Korean universities, and strengthen friendly exchange programs among young Koreans. Once the COVID-19 quarantine measures in the two countries are completely lifted, mutual visits and cooperation programs should be activated, as per the demand for cooperation between Korea and China, to reduce antipathy and hatred between the two countries.

스월 충돌제트의 열전달 특성에 관한 실험적 연굴

조정원,이상준,Jo, Jeong-Won,Lee, Sang-Jun 대한기계학회 2001 大韓機械學會論文集B Vol.25 No.10

The heat transfer characteristics off swirling air jet impinging on a heated flat plate have been investigated experimentally. The main object is to enhance the heat transfer rate by increasing turbulence intensity of impinging jet with a specially designed swirl generator. The mean velocity and turbulent intensity profiles of swirling jet were measured using a hot-wire anemomety. The temperature distribution on the heated flat surface was measured with thermocouples. As a result the swirl effect on the local heat transfer rate on the impinging plate is confined mainly in the small nozzle-to-plate spacings such as L/D<3 at the stagnation region. For small nozzle-to-plate spacings, the local heat transfer in the stagnation region is enhanced from the increased turbulence intensity due to swirl motion, compared with the conventional axisymmetric impinging jet without swirl. For example, the local Nusselt number of swirling jet with swirl number Sw=0.75 and Sw=1 is about 9.7-76% higher than that of conventional impinging jet at the radial location of R/D=0.5. With the increase of the nozzle-to-plate distance, the stagnation heat transfer rate is decreased due to the diminishing axial momentum of the swirling jet. However, the swirling impinging jet for all nozzle-to-plate spacings tested in this study does not enhance the average heat transfer rate.

대학 국제경쟁력 제고를 위한 경영 혁신 전략

조정원,Jo, Jeong-Won 한국대학교육협의회 2002 大學敎育 Vol.118 No.-

한국어 폐쇄자막을 이용한 지식기반 비디오 검색 시스템

조정원,정승도,최병욱 대한전자공학회 2004 電子工學會論文誌-CI (Computer and Information) Vol.41 No.3

저 수준의 특징정보를 사용하는 내용기반 검색만으로 지능형 정보검색을 위한 사용자의 개념적인 요구에 부합하는 검색결과를 제공하기 어렵다. 일반적으로 비디오 데이터에는 동영상 정보와 함께 음성, 음향 등의 오디오 정보와 폐쇄자막 등의 정보가 포함되어 있다. 지식기반 비디오 검색은 그러한 다양한 정보를 사용하여 자동색인을 수행하고 색인 데이터베이스를 구축한다. 이로써 사용자는 보다 개념적인 검색 요구에 부합하는 검색 결과를 얻을 수 있다. 본 논문에서는 비디오 내의 한국어 폐쇄자막을 이용한 지식기반 비디오 검색 시스템을 제안한다. 한국어 폐쇄자막은 형태소 분석 수준에서 자동색인되며, 색인 데이터베이스를 이용하여 키워드 질의를 통해 비디오를 검색할 수 있다. 실험에서 한국어 속기시스템으로 제작된 폐쇄자막이 포함된 뉴스비디오에 적용하여, 제안하는 방법이 사용자의 보다 의미 있는 개념적인 요구에 부합하는 검색 결과를 얻을 수 있음을 확인하였다. The content-based retrieval using low-level features can hardly provide the retrieval result that corresponds with conceptual demand of user for intelligent retrieval. Video includes not only moving picture data, but also audio or closed-caption data. Knowledge-based video retrieval is able to provide the retrieval result that corresponds with conceptual demand of user because of performing automatic indexing with such a variety data. In this paper, we present the knowledge-based video retrieval system using Korean closed-caption. The closed-caption is indexed by Korean keyword extraction system including the morphological analysis process. As a result, we are able to retrieve the video by using keyword from the indexing database. In the experiment, we have applied the proposed method to news video with closed-caption generated by Korean stenographic system, and have empirically confirmed that the proposed method provides the retrieval result that corresponds with more meaningful conceptual demand of user.

올림픽 주경기장의 전기설비

조정원 대한전기협회 1986 대한전기협회지 Vol.- No.118

Deadbeat response를 위한 컴퓨터보상기에 관한 연구

조정원 대한전기학회 1976 전기의 세계 Vol.25 No.5

Applications of the digital computers in the control systems are not new. But when one tries to integrate the control system with a digital computer to form a feedback loop, he has to solve a great deal of problems in both hardware and software aspects. Such problems are investigated in this paper. For the hardware aspect, one has to design interfaces for both ADC and DAC. Since these are absolutely necessary pieces of hardware, one can notavoid from using them. The interface which employ the programmed data transfer method was designed for this research. For the software aspect, one has to build models for the digital compensator and the controlled system. In order to do that it is necessary to utilize the real time clock and to write his own interrupt service routine. As a sample case, a deadbeat compensator was desinged and tested.

투르크메니스탄의 경제 발전 정책과투르크메니스탄 - 중국 경제 협력

조정원 중앙대학교 외국학연구소 2018 외국학연구 Vol.- No.44

The objective of the study is to analyze Turkmenistan's economic development policy and its economic cooperation with China, from a historical and current perspective. Turkmenistan gained independence after the dissolution of the Soviet Union in 1991. The newly independent country's first head of state, President Saparmyrat Ataýewiç Nyýazow, aimed to boost Turkmenistan's economy by developing its domestic industry, increasing residents' income, and diversifying the export route of natural gas, which was primarily centered to Russia. Turkmenistan’s government enhanced their activities to promote economic cooperation with mainland China to achieve these objectives. Concurrently, China wished to import natural gas by land to secure its supply. This was because natural gas imported via the Strait of Malacca had experienced instability in the Middle East, due to the sea control exerted by the United States Navy. Further, China needed to export products and required industry technology to maximize its profit. These economic demands helped enhance the economic collaboration between Turkmenistan and China. In April 2006, President Nyýazow and his Chinese counterpart, President Hu Jintao, signed a memorandum for constructing the Central Asia-China natural gas pipeline, and mutually agreed to diversify the natural gas trade route. From February 2007, the second head of state, President Gurbanguly Mälikgulyýewiç Berdimuhamedow opened up the country’s economy to foreign capital and foreign specialists to develop domestic manufacturing, and continued to diversify the natural gas trade route. The Central Asia-China natural gas pipeline, which was constructed by China National Petroleum and Natural Gas Cooperation (CNPC), has been exporting Turkmenistan’s natural gas to mainland China since December 2009. Specifically, the success of the diversification of the natural gas export route and the high oil and natural gas price until the first half of 2013 helped develop the domestic economy and pursue the welfare policy to the residents of Turkmenistan. Further, Chinese companies also helped develop the silk industry in Turkmenistan and exported railroad cars to Turkmenistan. Moreover, in the first half of 2016, other Chinese companies collaborated with Turkmenistanʼs companies to establish production bases for metal goods, gas turbines, granite stone, and marble. President Berdimuhamedow also hoped to develop the machinery industry, electronics industry, and other manufacturing businesses in Turkmenistan. To achieve this aim, he wanted to further enhance the economic collaboration with mainland China. However, the prolonged process of foreign business license registration, high interest rates in domestic banks, and the lack of excellent and skilled human capital in Turkmenistan hindered the attraction of more Chinese capital, which could have otherwise contributed to increasing the economic cooperation between the countries. Thus, the enhancement and intensification of mutual economic collaboration between Turkmenistan and China depends on whether the formerʼs government can present and implement a substantive economic policy, which could effectively address the aforementioned challenges.