Disturbance Attenuation Type Distributed Control for Identical Decoupled Linear Systems

Jun Araki,Kenko Uchida 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10

We propose a design method of disturbance attenuation type distributed control for identical decoupled linear systems together with conditions for stability of the closed loop global system. Using a simple example of formation flight corrupted by disturbances, we compare the design by the proposed method with that by the LQ control method in Borrelli and Keviczky (2006); we consider two kinds of disturbances, system disturbances and parameter variation. And we demonstrate that proposed method has superior robustness against disturbances.

일제강점기 경주의 유물 반출·훼손과 조선인의 대응 - 신라옥적과 일승각의 사례를 중심으로 -

아라키준 ( Araki Jun ) 국립중앙박물관 2020 고고학지 Vol.26 No.-

The Japanese undertook investigations of the sites and artifacts of Joseon around the time of Korea’s annexation by Japan, and interpreted the material as a means of justifying colonial occupation. Previous research on the practices of Historic Sites Investigation have tended to focus on the logic and actions of the Japanese, and Koreans have resultingly been regarded as passive subjects. Such an approach contains the possibility of reproducing the problematic historical perspective in which the active agency of the Korean people is overlooked. The present article adopts a micro-historical approach, focusing on the Gyeongju region (which, along with Pyeongyang, was where Historic Sites Investigations were most intensively undertaken during the period of Japanese occupation), in order to identify and highlight the logic and resistance of the Joseon people at the time. In particular, Japanese attempts to illicitly export or destroy the ‘Jade Flute of Silla’, which was regarded as a treasure by the Korean people, and Ilsunggak, a highly revered place that had served as the office of the Mayor of Gyeongju in the Joseon Period, and Korean attempts to resist such actions are examined as a means of highlighting the historical agency of the Korean people. Korean people, who lacked political power at the time, found it difficult to adopt direct means of resistance, such as force or demonstration, in order to protect their cultural heritage. Therefore, other strategies were adopted, such as hiding artifacts or turning upon its head the ideology of colonial rule or the political power of Japanese figures of authority. As a result of this, the Jade Flute of Silla, which had been smuggled out to Seoul, was returned to Gyeongju; Ilsunggak was preserved by being relocated and its buildings reused as temple buildings. As such strategies tended to be vague in nature, it has been difficult until now to establish them as objects of research. However, artifacts and sites can provide a channel into highlighting how Koreans were active agents in the determining the course of history, and not merely passive subjects. The case studies of the jade flute of Silla and Ilseunggak discussed in this paper represent the tip of the iceberg in attempts made by Koreans to protect their cultural heritage in the period of Japanese occupation. It is hoped that the accumulation of in-depth analyses of detailed examples will act to open a new avenue of research on Historic Sites Investigation activities.

일제시기 경주(慶州)지역 문화재의 반출 경로에 대한 역사인류학적 고찰

아라키준 ( Araki Jun ) 한국문화인류학회 2017 韓國文化人類學 Vol.50 No.3

일제시기의 조선 문화재 반출에 관해서는 주로 해외 소재 문화재의 반환문제와 결합되어 그 반출경로와 현재 일본의 소재지를 규명하는 연구가 많이 수행되었다. 그러나 이러한 연구들에서 조선 문화재의 반출과정과 경로에 대한 규명이 개별적이고, 한층 더 체계적으로 연구될 필요가 있다. 본고는 일제시기 가장 많은 문화재가 반출된 곳으로 지목되는 경주를 무대로 문화재 반출의 과정에 대하여 미시사적 방법론을 통해서 체계적으로 논의를 전개한다. 우선 문화재가 발견지에서 구리하라 골동상, 경주박물관, 경찰서 등으로 이동하는 1차적 반출과 일단 모여진 문화재가 일본을 비롯한 외지로 이동하는 2차적 반출로 나누어 분석한다. 1차적 반출에 관해서는 우선 공사나 농사로 일하는 동안에 우연히 발견된 문화재가 어떻게 구리하라 골동상이나 기타 중개인으로 불법적으로 반출되었는지를 규명한다. 그 과정에서 원래 문화재를 보호하기 위한 법률이었던 유실법 13조가 제대로 운영되지 못하여 오히려 불법반출을 부추기는 결과를 가져왔음을 지적한다. 또한 유실법 13조에서 규정된 문화재 발견자에 대한 보상금으로 문화재의 화폐적 가치가 사람들의 인식에 각인되어 문화재의 도굴이나 도둑행위가 빈번하게 일어나는 배경이 된 점을 지적한다. 2차적 반출에 관해서는 구리하라 골동상과 밀접한 관계를 맺었던 시바타여관의 주인 시바타 단쿠로와 총독부박물관 경주분관 주임(관장격)을 맡은 모로가 히데오가 문화재를 통해서 이윤독점체제를 구축하면서 수많은 문화재를 일본 등 외지로 반출시킨 과정을 밝혀낸다. 이상의 1차적, 2차적 반출에 대한 분석을 통하여 일제시기 조선 문화재의 반출은 기본적으로 일본인의 탐욕과 지배자로서의 오만이 일으킨 역사적인 문제로 더 심층적인 규명이 요구되는 동시에 오늘날과 연속된 문제로 다룰 필요가 있음을 지적한다. Regarding the export of cultural property of Joseon in the period of Japanese occupation, a great deal of research has been conducted to identify the export routes and current locations of such property in Japan for the purpose of the repatriation of cultural property overseas. However, there is a need for more systematic research to find the specific processes and routes by which the cultural property of Joseon was exported. This paper takes a micro-historical methodological approach to the export of cultural property and it presents a systematic analysis of the issue. The focus is on Gyeongju, from which the largest number of cultural properties was exported in the period of Japanese occupation. There are two areas of inquiry: 1] primary export, in which cultural property was taken from original locations to the Kurihara Antique Shop, the Gyeongju Museum and police stations, and 2] secondary export, wherein the collected cultural property was transferred to Japan and other countries. As for primary export, the paper defines how cultural property, which was found unexpectedly during construction or farm work, was illegally taken to the Kurihara Antique Shop or other antique dealers. It notes that the inefficient implementation of Article 13 of the Lost Article Act, which was formulated to protect cultural property, instead tended to encourage illegal export. Moreover, it also discusses how compensation for those who found cultural property items, set forth in Article 13 of Lost Article Act, led to an increased frequency of excavation and robbery of cultural property by making people aware of its monetary value. As for secondary export, the paper reveals how Shibata Dankuro, an owner of the Shibata Inn and Moroga Hideo, a manager (director level) of the Gyeongju annex of the government-general museum, had a close relationship with the Kurihara Antique Shop and formed a profitable monopoly in exporting a great number of cultural properties to Japan and other countries. Analysis of the aforementioned primary and secondary exports shows that the export of cultural property of Joseon in the period of Japanese occupation not only requires an in-depth investigation as a historical issue, caused principally by the arrogance and greed of the Japanese occupiers, but also requires close attention as an issue that continues to have relevance today.

일제식민지기 경주 일본인 이민에 대한 미시적 고찰 -경주읍 서경사(慶州邑 西慶寺)의 성립과정을 중심으로-

荒木潤 ( Araki Jun ) 동서대학교 일본연구센터 2013 次世代 人文社會硏究 Vol.9 No.-

일제식민지기 금관총 출토유물을 둘러싼 다층적 경합

아라키 준(Araki, Jun) 한국사연구회 2016 한국사연구 Vol.- No.174

Isolation and Characterization of Bacteria Capable of Metabolizing Lignin-derived Low Molecular Weight Compounds

Jun Hirose,Akari Nagayoshi,Naoya Yamanaka,Yuji Araki,Haruhiko Yokoi 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.4

Lignin, a major component of biomass, composed of homogeneous phenolic monomers and functions as a synthetic precursor in the production of specialty chemicals or polymers. In this study, bacterial strains that metabolize lignin-derived low molecular weight compounds (LLCs)were cultured which are capable of LLC bioconversion. We used an LLC mixture primarily composed of vanillin (VL), syringaldehyde (SA), vanillic acid (VA) and phydroxybenzoic acid which were prepared from a commercial alkaline lignin product. Enrichment culture was repeated twice in a medium containing the soil sample, the LLCs and inorganic salts. Three bacterial strains belonging to the genera Pseudomonas, Ochrobactrum, and Klebsiella were isolated. We found that only VL, SA, and VA were metabolized by the Pseudomonas strain, which was then found to grow in a medium with VL or VA as the sole source of carbon and energy. The VL isomers, namely, ovanillin and isovanillin were converted to the corresponding carboxylic acids but were not utilized as carbon sources by Pseudomonas. VL and VA are intermediates in the pathway of bacterial degradation of eugenol via ferulic acid. Several bacterial strains that metabolize VL, eugenol, and ferulic acid have been reported but such strains are rarely isolated from enrichment culture medium containing LLCs, due to insufficient induction by the precursors in the LLC medium. In this study, we demonstrated that the microorganisms involved in the bioconversion of LLCs can be isolated from simple enrichment culture.

플라즈마 용사법으로 제작된 4mol% Y₂O₃-ZrO₂ 열차폐코팅의 화산재에 의한 고온열화거동

Lee, Won-Jun,Jang, Byung-Koog,Lim, Dae-Soon,Oh, Yoon-Suk,Kim, Seong-Won,Kim, Hyung-Tae,Araki, Hiroshi,Murakami, Hideyuki,Kuroda, Seiji 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.6

The hot corrosion behavior of plasma sprayed 4 mol% $Y_2O_3-ZrO_2$ (YSZ) thermal barrier coatings (TBCs) with volcanic ash is investigated. Volcanic ash that deposited on the TBCs in gas-turbine engines can attack the surface of TBCs itself as a form of corrosive melt. YSZ coating specimens with a thickness of 430-440 ${\mu}m$ are prepared using a plasma spray method. These specimens are subjected to hot corrosion environment at $1200^{\circ}C$ with five different duration time, from 10 mins to 100 h in the presence of corrosive melt from volcanic ash. The microstructure, composition, and phase analysis are performed using Field emission scanning electron microscopy, including Energy dispersive spectroscopy and X-ray diffraction. After the heat treatment, hematite ($Fe_2O_3-TiO_2$) and monoclinic YSZ phases are found in TBCs. Furthermore the interface area between the molten volcanic ash layers and YSZ coatings becomes porous with increases in the heat treatment time as the YSZ coatings dissolved into molten volcanic ash. The maximum thickness of this a porous reaction zone is 25 ${\mu}m$ after 100 h of heat treatment.

Improved Target Impedance for Power Distribution Network Design With Power Traces Based on Rigorous Transient Analysis in a Handheld Device

Jingook Kim,Takita, Yuzo,Araki, Kenji,Jun Fan IEEE 2013 IEEE transactions on components, packaging, and ma Vol.3 No.9

<P>The concept of target impedance can be significantly improved, based on the rigorous closed-form expressions for transient supply voltage ripple excited by an integrated circuit (IC) switching current, for the power distribution network (PDN) with power traces that is commonly used in handheld devices. A systematic procedure for developing the target impedance is formulated, which is then applied to the PDN design of a handheld product. From measurements of transient IC switching currents, PDN impedance, and supply voltage ripple, it is shown that the proposed target impedance successfully correlates the PDN impedance in the frequency domain with the transient supply voltage ripple in the time domain.</P>

Communications Satellite's Development Plan in NASDA and Space Infrastructure "i-Space" Program

Kuroda, Tomonori,Gomi, Jun,Araki, Tsunehiko,Tomita, Eiichi,Maeda, Tsuyoshi,Kadowaki, Naoto,Nakao, Masahiro 통신위성우주산업연구회 2000 Joint Conference on Satellite Communications Vol.2000 No.-

Satellite communications technology has been researched and developed focusing on its merit of "Wide area coverage" and "Broadcasting" for the contribution for the people's living. And, in Japan, consequently, Communications Satellite (CS) and Broadcasting Satellite (BS) are now put to practical use as an infrastructure which will greatly enrich the people's living. The National Space Development Agency of Japan (NASDA) has been working on development and research in communications and broadcasting satellite and its technologies with cooperation and support of other institutions concerned. This paper outlines NASDA's projects of satellite communications mission like Optical Inter-orbit Communications Engineering Test Satellite (OICETS), Data Relay Test Satellite (DRTS) and Engineering Test Satellite-VIII (ETS-VIII) and "i-Space Project", which has been just initiated.

Software Sensing for Glucose Concentration in Industrial Antibiotic Fed-batch Culture Using Fuzzy Neural Network

Imanishi, Toshiaki,Hanai, Taizo,Aoyagi, Ichiro,Uemura, Jun,Araki, Katsuhiro,Yoshimoto, Hiroshi,Harima, Takeshi,Honda , Hiroyuki,Kobayashi, Takeshi The Korean Society for Biotechnology and Bioengine 2002 Biotechnology and Bioprocess Engineering Vol.7 No.5

In order to control glucose concentration during fed-batch culture for antibiotic production, we applied so called “software sensor” which estimates unmeasured variable of interest from measured process variables using software. All data for analysis were collected from industrial scale cultures in a pharmaceutical company. First, we constructed an estimation model for glucose feed rate to keep glucose concentration at target value. In actual fed-batch culture, glucose concentration was kept at relatively high and measured once a day, and the glucose feed rate until the next measurement time was determined by an expert worker based on the actual consumption rate. Fuzzy neural network (FNN) was applied to construct the estimation model. From the simulation results using this model, the average error for glucose concentration was 0.88 g/L. The FNN model was also applied for a special culture to keep glucose concentration at low level. Selecting the optimal input variables, it was possible to simulate the culture with a low glucose concentration from the data sets of relatively high glucose concentration. Next, a simulation model to estimate time course of glucose concentration during one day was constructed using the on-line measurable process variables, since glucose concentration was only measured off-line once a day. Here, the recursive fuzzy neural network (RFNN) was applied for the simulation model. As the result of the simulation, average error of RFNN model was 0.91 g/L and this model was found to be useful to supervise the fed-batch culture.