Culture et politique en Core´e : pour une approche culturaliste

Yoo, Junghwan 청주대학교 사회과학연구소 1993 한국사회과학연구 Vol.12 No.-

Il est loisible d'aborder la vie politique d'un pays sous deux aspects : s'agissant du conjoncturel et du court terme, l'approche socio-e´conomique para^it la plus adapte´e, la de´marche culturaliste, quant a` elle, semblerait plus approprie´e au moyen et long terme. L'pbservateur impartial s'attachant a` comprendre le devenir de la Core´e sera frappe´ par un contraste marque´ entre la modernite´ d'un de´veloppement socio-e´conomique acce´le´re´ et l'immobilisme de structrures et pratiques politiques importe´es de l'occident et plaque´es artificiellement sur la re´alite´ core´enne.

CMOS 120 GHz Phase-Locked Loops Based on Two Different VCO Topologies

Junghwan Yoo,Jae-Sung Rieh 한국전자파학회JEES 2017 Journal of Electromagnetic Engineering and Science Vol.17 No.2

This work describes the development and comparison of two phase-locked loops (PLLs) based on a 65-nm CMOS technology. The PLLs incorporate two different topologies for the output voltage-controlled oscillator (VCO): LC cross-coupled and differential Colpitts. The measured locking ranges of the LC cross-coupled VCO-based phase-locked loop (PLL1) and the Colpitts VCO-based phase-locked loop (PLL2) are 119.84−122.61 GHz and 126.53−129.29 GHz, respectively. Th e output powers of PLL1 and PLL2 are −8.6 dBm and −10.5 dBm with DC power consumptions of 127.3 mW and 142.8 mW, respectively. The measured phase noise of PLL1 is −59.2 at 10 kHz offset and −104.5 at 10 MHz offset, and the phase noise of PLL2 is −60.9 dBc/Hz at 10 kHz offset and −104.4 dBc/Hz at 10 MHz offset. The chip sizes are 1,080 μm × 760 μm (PLL1) and 1,100 μm × 800 μm (PLL2), including the probing pads.

Synthesis of Heterobimetallic Complexes Containing Ni(II) Complex of N,$N^{\prime}$-Dimethyl-N,$N^{\prime}$-Bis($\beta$-mercaptoethyl)ethylenediamine and Metal Carbonyls

Junghwan Yoo,Jaejung Ko,Sang-Eun Park Korean Chemical Society 1994 Bulletin of the Korean Chemical Society Vol.15 No.9

한국문화와 정치 : 유교적 정치질서에 대한 문화론적 해석

유정환(Yoo Junghwan) 한국정치학회 1996 한국정치학회보 Vol.29 No.4

문화를 ‘의미의 체계’로 보는 기호학적 인식은 사회현상에 대한 문화론적 접근에 새로운 가능성을 부여하였다. 특히 정치가 고도의 상징성을 함축하는 것인 만큼 한 나라의 정치를 그 나라 고유의 ‘의미의 체계’인 문화를 통하여 해석해 본다는 것이 각별한 의미를 갖는다 하겠다. 본 연구는 바디(Bertrand Badie)가 제시한 정치에 대한 문화론적 분석모델에 따라 이원론적 기독교문화와 일원론적 이슬람문화와의 비교를 통하여 한국문화가 토착 무속신상에 뿌리를 두고 유교에 의하여 체계화된 ‘상보성의 원리’라는 문화코-드를 갖고 있는 것으로 보았다. 그리고 이원론적 기독교사회에서는 정치와 종교의 분화현상이 나타나고 일원론적 이슬람공동체에서는 두 영역간의 탈분화 내지 융합의 경향이 지배적인 반면 ‘상보성의 원리’를 바탕으로 하는 한국사회에서는 정치와 윤리의 중첩현상이 존재한다고 보았다. 또한 기독교사회가 개별영역의 자율성을 중시하고 이슬람사회가 영역간의 통일을 지향하는데 반하여 한국사회는 둘 사이의 조화를 추구한다고 보았다. 한편 정치와 윤리의 중첩현상과 두 영역간의 조화의 추구를 가져온 ‘상보성의 원리’는 유교적 의미의 체계의 핵심 논리로써 유교적 정치질서의 제측면에 고유의 의미를 부여함으로써 그 특징을 규정한다고 보았다. 예컨대 윤리국가와 지식엘리트로 구성된 관료제의 발달, 교육과 경제에 대한 국가의 후견인적인 통제와 간섭, 왕도와 패도라는 정치권력의 양면성과 둘사이의 조화의 추구, 예법과 실정법 그리고 형법과 민법 사이의 중첩 현상 등이 유교적 정치질서에 나타나는 것이다. 그리고 이러한 특징들은 유교적 정치질서를 전통으로 하는 오늘날의 한국정치를 해석함에 있어 귀중하고 유익한 준거가 될 것으로 보았다.

Simulation of microvascular signal changes used on a gadolinium-chelated contrast agent at 3 T MRI in the presence of amyloid-beta plaques

Yoo Chang Hyun,Goh Junghwan,Jahng Geon-Ho,Jin Seokha,Lee DongKyu,Cho HyungJoon 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.81 No.11

It is important to understand microvascular alterations in the brain of Alzheimer disease (AD) patients which usually has amyloid-beta plaques in an imaging voxel, causing a phase dispersion in an MRI signal. The objective of this study was to simulate the changes of transverse relaxation rates and microvascular indexes with and without the presence of amyloid-beta plaques in an imaging voxel with using a clinically available contrast agent. The Monte Carlo simulations with the fnite perturber method were used to calculate microvascular indices of mean vessel diameter (mVD), vessel size index (VSI), mean vessel density (Q), blood volume fraction (BVf), and microvessel-weighted imaging (MvWI) with and without the presence of amyloid-beta plaques in an imaging voxel. The simulation was performed with the conditions of three diferent magnetic feld strengths (1.5 T, 3 T and 7 T), several diferent echo times for gradient-echo (15, 40, and 60 ms) and spin-echo (20, 80, and 100 ms) images, and two diferent contrast agents (gadolinium (Gd)-chelated and superparamagnetic iron oxide nanoparticles (SPION)-based contrast agents). The changes of relaxation rates and microvascular indexes were evaluated with increasing the microvascular vessel sizes and with increasing the amyloid plaque loads. In the microvascular structures without amyloid plaques, ΔR2* and ΔR2 increased as the B0 feld became stronger, the susceptibility diference of the contrast agent became larger, and the echo time was increased. Both mVD and VSI increased with increasing microvessel sizes, but Q decreased with increasing microvessel sizes. In the microvascular structures with amyloid plaques, ΔR2* and ΔR2 were not varied with increasing the vessel radius, but higher in the 3.81% concentration of amyloid plaque than 1.83% of that. BVf and MvWI were increased with increasing the plaque load. The BVf and MvWI indices were sensitive to evaluate the integrity of the microvascular in the AD brain since those values were increased with increasing the plaque load. Therefore, it is worthwhile to evaluate microvascular structure changes in the AD human brain using 3 T MRI with a Gd contrast agent.

SVC-based Adaptive Video Streaming over Content-Centric Networking

( Junghwan Lee ),( Jaehyun Hwang ),( Nakjung Choi ),( Chuck Yoo ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.10

In recent years, HTTP adaptive streaming (HAS) has attracted considerable attention as the state-of-the-art technology for video transport. HAS dynamically adjusts the quality of video streaming according to the network bandwidth and device capability of users. Content-Centric Networking (CCN) has also emerged as a future Internet architecture, which is a novel communication paradigm that integrates content delivery as a native network primitive. These trends have led to the new research issue of harmonizing HAS with the in-network caching provided by CCN routers. Previous research has shown that the performance of HAS can be improved by using the H.264/SVC(scalable video codec) in the in-network caching environments. However, the previous study did not address the misbehavior that causes video freeze when overestimating the available network bandwidth, which is attributable to the high cache hit rate. Thus, we propose a new SVC-based adaptation algorithm that utilizes a drop timer. Our approach aims to stop the downloading of additional enhancement layers that are not cached in the local CCN routers in a timely manner, thereby preventing excessive consumption of the video buffer. We implemented our algorithm in the SVC-HAS client and deployed a testbed that could run Smooth-Streaming, which is one of the most popular HAS solutions, over CCNx, which is the reference implementation of CCN. Our experimental results showed that the proposed scheme (SLA) could avoid video freeze in an effective manner, but without reducing the high hit rate on the CCN routers or affecting the high video quality on the SVC-HAS client.

End-to-end Convolutional Neural Network Design for Automatic Detection of Influenza Virus

Junghwan Lee,Heesang Eom,Yuli Sun Hariyani,Cheonjung Kim,Yongkyoung Yoo,Jeonghoon Lee,Cheolsoo Park 대한전자공학회 2021 IEIE Transactions on Smart Processing & Computing Vol.10 No.1

Owing to the high mortality rate of influenza diseases, the early examination and accurate detection of the influenza virus are crucial for preventing potential tragedies. This paper reports the design of a highly reliable machine learning classifier for automatic detection of the influenza virus based on an image of its detection kit. Convolutional neural networks (CNNs), currently the most reliable image classifiers, were designed for the images of an influenza detection kit, and their hyperparameters were fine-tuned using an architecture search algorithm, Bayesian optimization, and hyperband (BOHB). With an overall accuracy of 90.14%, the designed and optimized 2DCNNs algorithm successfully separate the influenza virus from normal using the detection kit images.

미국의 일방주의 대외정책의 기원과 전개과정

유정환 청주대학교사회과학연구소 2006 한국사회과학연구 Vol.28 No.2

이라크 전쟁의 희생자가 날로 증가하고 미 의회가 진구렁으로 부터 미군을 빼내올 방법을 찾으려고 골몰하는 때에 누구나 던지는 질문은 무엇이 잘못된 것 인가 이다. 그 답은 일방주의인데 다자주의자인 아버지 부시와 달리 이라크를 침공한 부시 대통령은 철저한 일방주의자란 것이다. 이 논문은 미국 대외정책에 반복해서 나타나는 일방주의 경향의 기원과 그 전개과정을 파악하기 위해 역사를 거슬러 오른다. 메이 플라워 호의 출범으로 부터 제2차 세계대전에 이르는 기간에 대한 짤막한 검토를 통하여 미국은 예외적 국가라는 소위 '미국예외주의'가 미국사의 여명기부터 형성되어 지금까지 이어져 왔음을 알게 되었다. 시대적 상황에 따라 그리고 미국예외주의의 강력한 표현인 '뚜렷한 운명'에 대한 확신 속에 미국은 고립주의, 윌슨주의, '우선 미국부터' 또는 미국의 사명 등 다양한 대외정책 정향을 채택해 왔으며 그 결과 다자주의와 일방주의가 미국 대외정책의 역사에 엇갈려 나타났던 것이다. 예컨대 현 부시 행정부의 강한 일방주의 정향은 클린턴 행정부의 '단호한 다자주의'의 뒤를 잇는 것이었다. 뒤이어 논문은 현재의 일방주의적 경향을 역사의 맥락 속에 비추어 보려고 레이건 행정부에서 부시 행정부에 이르는 기간의 미국 대외정책을 다소 자세히 분석하였다. 레이건 시대에는 미국의 강한 군사력과 윤리적 순수성을 주장하는 네오-콘들의 주장에 따라 일방주의적 대외정책이 그리고 세계화의 증진을 정책목표로 삼은 클린턴 대통령은 소위 '단호한 다자주의'를 채택하였다. 네오-콘들이 다시 미국 안보와 국방 분야의 요직을 차지한 부시 행정부는 출범부터 대외정책의 일방주의를 천명했다. 그리고 9.11. 사태가 터진 것이다. 이제 윤리적 가치를 위하여 미국의 막강한 힘을 거침없이 휘두를 때가 온 것이며 이라크에 대한 일방적 침공이 감행된 것이다. 현 국제체제 아래서 각 주권국가는 나름대로의 국익을 추구하기 위하여 '일방주의' 정책을 마다하지 않는다. 그러나 이 같은 정책의 성패는 뒤를 바치는 국력에 따라 결정된다. 유일 초강대국인 미국이 일방주의 정책을 추진하여 원하는 바를 얻는 것 자체를 탓 할 수는 없다. 부시의 일방주의가 문제되는 것은 그 것이 때로는 미국에 불리한 결과를 가져올 수 있기 때문이다. 세계화는 미국 경제의 대외 의존도를 높게 만들었고 범죄, 오염, 테러 등 현대세계의 문제들은 국제공조를 필요로 한다. 무엇보다 이라크 침공이 정책적 파탄이기 때문에 미국은 그 것을 초래한 일방주의를 포기 하여야 한다. 다행이 공화당과 민주당의 차기 대선 후보들 모두가 전통적인 미국의 국제주의로의 복귀를 주장하고 있다. With the toll of the lraq war mounting daily and the U.S. Congress trying hard to find out how to extricate its troops from the quagmire, the question that everyone asks are what went wrong. The answer to the question can be summed up in one word: unilateralism. While the senior George Bush was an multilateralist, his son has been an arch-unilateralist. This paper revisits the history of U.S. foreign policy in an effort to trace back the origins of the unilateral tendencies which constitute its recurring aspects and to follow its ensuing developments. A brief historical review of U.S. foreign policy from the May Flower era to the Second World War shows that a kind of American exceptionalism had been cultivated out of the unique and universal historical experiences of the U.S. from the begining. Depending on the circumstances and with the conviction of their Manifest Destiny, an expression of their exceptionalism, U.S. adopted different foreign policy orientations such as isolationism, Wilsonism, 'America First' or American mission theory. That is to say that the history of U.S. foreign policy has been crisscrossed by the unilateral phases and the multilateral ones. So the strong unilateralist tendency in Bush Administration Ⅰ and Ⅱ has followed the "assertive multilateralist" phase of two Clinton Administrations. The paper examines more in detail the U.S. foreign policy from the Reagan Administration to the Bush Administration in oder to understand the current unilateralist tendencies in the light of the legacy of the history of U.S. foreign policy. During the Reagan Administration, owing to the Neo-cons' insistence on the strong military power and the moral clearness the U.S. foreign policy tended to be unilateral. But, in an effort to enhance the globalization, the Clinton Administration has advocated so called 'Assertive mutilateralism' in its foreign policy shaping. With the numerous Neo-cons occupying once again the key posts of national security and defense agencies, the Bush Administration showed from the beginning a strong tendency to the unilateralist approach in foreign affairs. After the shock of the 9.11. the Neo-cons could convince the president to embody their idea that U.S. should not hesitate to use its military power for a moral cause. And the result was the war against lraq. Under the actual international political system, each sovereign State pursues its foreign policy for the shake of its own 'national' and 'unilateral' interests. And the national power of the State has the final word for the result of this unilateral pursuit. As the unique superpower, U.S.'s strong tendency to the unilateralist foreign policy can not be criticized for itself. What is the matter with the Bush Administration's unilateralism is the fact that it may serve negatively to the U.S. national interests due to the difficulties which it encounters in the national and international realities. The globalization has made the American economy more dependent on foreign economies and more vulnerable with its enormous foreign debt. And the modern items of today's international agenda such as crimes, pollutions and terrorism require, if they should be treated efficiently, a multilateral international cooperation. Most of all, and precisely because lraq is policy disaster, one consequence may well be a national abandonment of the attitudes that brought it about. Republican as well as Democratic candidates for the presidency are, with varying degrees of explicitness, promising a restauration of what amounts to traditional American internationalism---that is, a repudiation of Bush unilateralism.

통신사업자의 신사업 발굴 사례 연구

이정환(Junghwan Lee),유재흥(Jaeheung Yoo) 한국경영학회 2018 Korea Business Review Vol.22 No.3

최근 통신사업자는 기존의 모바일, 인터넷, 미디어 서비스에서 벗어나 디지털 기술을 활용한 새로운 미래성장동력 발굴을 추진하고 있다. 특히 에너지 분야는 친환경 전력생산, 획기적 효율성 개선 등에 관심이 증가하는 가운데, 인공지능, 클라우드, 빅데이터, IoT 등을 활용한 지능형 융합 서비스를 중심으로 새로운 시장이 점차 확대되고 있다. 이와 관련하여 본 연구는 통신사업자 KT의 스마트에너지 서비스를 중심으로 세부 서비스 추진내용과 성과, 성공 전략에 관한 사례분석을 수행하였다. KT의 스마트에너지 서비스는 전세계적 기후변화와 에너지 소비 증가 같은 에너지 관련 문제 해결을 위해 ICT를 활용한 신사업이다. 통합에너지 서비스 플랫폼인 ‘KT-MEG(Micro Energy Grid)’ 구축을 통해 에너지의 생산 · 소비 · 거래 영역별로 데이터를 수집하고 분석하여 에너지 소비 패턴 진단은 물론 수요예측과 비용절감방안을 제시하여 고객관점의 새로운 에너지 이용경험을 제공하는데 집중했다. 그 결과 수익 창출은 물론 글로벌 위상 강화, 친환경 기업이미지 제고 등의 성과를 만들었다. 특히 추진 과정에서 기존 사업과 신사업 조직 간의 시너지를 만들어 내는 양손잡이 조직(Ambidextrous organization) 체계를 구축하였다. 뿐만 아니라 빠른 시장 진입을 위해 에너지 관리자가 따로 없는 중소형 건물을 대상으로 무료형 에너지관리 솔루션을 확산하였는데 이는 크리스텐슨이 주장하는 저가형(low-end)과 신시장 창출형(new market creation) 파괴적혁신(Disruptive innovation)을 동시에 추구한 것으로 볼 수 있다. 전통적인 음성, 데이터 통신 서비스에서 벗어나 스마트에너지라는 새로운 ICT융합 비즈니스를 개척한 KT의 사례는 산업 경계가 무너지고 경쟁이 급격히 변화하는 사업 환경에서 다양한 사업적 변화를 시도하는 기업들에게 전략적 시사점을 제공해 줄 수 있을 것이다. Recently, telecom operators are interested in discovering new future growth engines that utilize digital technology, away from existing mobile, internet and media services. In particular, the energy field is expected to expand new opportunities centering on intelligent and converged services that utilize artificial intelligence, Cloud, Big data, and Internet of Things technology, while increasing interest in eco-friendly power generation and breakthrough efficiency improvements. In this regard, this study conducted a case study focusing on smart energy service of KT. KT`s smart energy service maximizes the use of ICT to solve energy problems such as deepening global climate change and increasing energy consumption. It also provides energy use diagnosis as well as forecasts and alternatives through analysis of big data collected by production, consumption and transaction areas. Through implementing KT-MEG, an integrated energy service platform KT has achieved not only an increase in sales, but also the enhancement of its global and eco-friendly corporate image. In particular, KT has dramatically changed its previous service promotion method, organization operation and service delivery system for the new business. Specifically, KT has differentiated the customers experience through providing integrated service throughout the entire processes from energy production to consumption. From the organizational viewpoint, KT has operated ambidextrous organizations for the smart energy business and separated it from the existing organizational system. Finally, for the rapid spread of the market, KT had provided a disruptive innovation services for small and medium sized companies. As the business boundary has been collapsing and technological paradigm has dramatically been changing, this case provide insights for companies to transform and evolve their business strategy in appropriate way.

Copper-Graphene Composite Materials as a Conductive Filler for Thermal and Electrical Interface Adhesive

Hwang, Junghwan,Park, Minjeong,Jang, Sukhun,Choi, Hyunkwang,Jang, Jintak,Yoo, Youngjo,Jo, Hyungho,Jeon, Minhyon American Scientific Publishers 2017 Journal of Nanoscience and Nanotechnology Vol.17 No.5

<P>Recently, both heat dissipation and the electromagnetic wave generated from the devices have emerged as critical issues as semiconductor devices are getting miniaturized and integrated densely. Thermal and electrical conductive adhesives using graphene-Cu particle composite materials were fabricated. Graphene oxide (GO) was synthesized by using improved Hummer's method and it was reduced by hydrazine. The surfaces of Cu particles were functionalized by 2,2'-Bithiophene to form the self-assembled monolayers (SAMs). The SAMs not only provide a convenient means for preparing covalent bond with functional groups of reduced-GO (rGO), but also it can prevent oxidation. The experimental results were analyzed by using Raman Spectroscopy, Fourier Transform Infrared Spectroscopy, Digital-multimeter, C-Therm TCi Thermal conductivity Analyzer, X-ray Photoelectron Spectroscopy. Our experimental results demonstrate that the functionalized Cu (F-Cu) attached with rGO composites could be a possible substitute for commercialized fillers at present (e.g., Ag-coated copper fillers) because our new F-Cu+rGO composite filler in conducting adhesives is cheaper and lighter than those of Ag-coated Cu fillers.</P>