Nonlinear Adaptive Control Law for ALFLEX Using Dynamic Inversion and Disturbance Accommodation Control Observer

Daisaku Higashi,Yuzo Shimada,Kenji Uchiyama 제어로봇시스템학회 2005 제어로봇시스템학회 국제학술대회 논문집 Vol.2005 No.6

Work and Eldercare in Japan

Daisaku Maeda 한국노인복지학회 2000 International Journal of Welfare for the Aged Vol.2 No.-

Verification of cloud overlap parametarization schemes for satellite radiance assimilation by using CloudSat data

Daisaku Uesawa 한국기상학회 2011 한국기상학회 학술대회 논문집 Vol.2011 No.10-2

Effects of Oral Administration of Difructose Anhydride III on Selected Health and Blood Parameters of Group-housed Japanese Black Calves during the Preweaning Period

Matsumoto, Daisaku,Takagi, Mitsuhiro,Hasunuma, Hiroshi,Fushimi, Yasuo,Ohtani, Masayuki,Sato, Tadashi,Okamoto, Koji,Shahada, Francis,Tanaka, Tetsuya,Deguchi, Eisaburo Asian Australasian Association of Animal Productio 2009 Animal Bioscience Vol.22 No.12

Two field studies were conducted to determine the efficacy of difructose anhydride III (DFA III) as a supplement in colostrum replacer (CR) for improving the general health status (judged on the basis of incidence of enteritis, bronchitis, and pneumonia) of group-housed suckling Japanese Black calves. In a preliminary study, CR supplemented with DFA III (6 g) was orally administered within 24 h of calving to eight individually reared calves fed colostrum (DFA III group) (Exp. 1). Subsequently, CR supplemented with DFA III (6 g) was orally administered twice within 2 and 12 h of calving to four calves (DFA III group) that were not fed colostrum (Exp. 2). In both experiments, the health status of the calves was assessed during the preweaning period. In Exp. 2, hematological and blood-chemistry parameters were analyzed 24 h after the second administration of CR and at 1 wk and 1 month after calving. The results were compared between the DFA III and control groups (without DFA III supplementation; Exp. 1: n = 10, Exp. 2: n = 4). In Exp. 1, the number of calves requiring medications for the treatment of enteritis, bronchitis, and pneumonia during the preweaning period was significantly (p<0.05) lower in the DFA III group than in the control group. In Exp. 2, supplementation of DFA III did not influence the gain in body weight of calves during the pre-weaning period. Calves in the DFA III group tended to require medications for a shorter duration than those in the control group (DFA III: 10.3 d/calf, control: 21.3 d/calf; p = 0.07). Significant differences (p<0.05) in the level of mean corpuscular hemoglobin, total protein, total cholesterol, and immunoglobulin (Ig)G were observed between the DFA III and control groups. These differences probably reflect the health and nutritional status of the calves. Additionally, the serum iron and lactoferrin concentrations at 24 h and 1 wk after calving, respectively, differed significantly between the 2 groups. These concentrations might reflect the incidence of infections after calving. The present study revealed that the administration of DFA III as a CR supplement may prevent diseases in group-housed calves during the pre-weaning period.

고도성장기 경제논쟁의 시모무라 이론 재고찰 : 기업가의 이론적 지위에 대하여

사토다이사쿠(Sato Daisaku) 韓國外國語大學校 外國學綜合硏究센터 日本硏究所 2016 日本硏究 Vol.0 No.67

본 논문은 고도경제성장기의 경제논쟁에서 중심적인 역할을 한 시모무라 오사무의 경제이론을 이념적, 사상적 측면에 주목하여 고찰하는 것을 목적으로 한다. 먼저, 고도성장기 초기와 발전기에 이루어진 2개의 논쟁 - ‘재고논쟁’과 ‘성장논쟁’ -을 검토하고, 통계수치를 둘러싼 논쟁의 배경이 되는 각 논자들의 경제사상을 끌어냄으로써 시모무라가 기업가의 중요성에 주목하고 있었다는 것을 알 수 있다. 다음으로 시모무라의 이론연구를 통해 그가 기업가에 주목한 근거를 찾아낸다. 그는 전후, 이른 시기부터 케인즈 경제학을 비판적으로 습득하였고, 그것에 근거하여 ‘유효산출’이라는 개념을 이용한 독특한 ‘시모무라 이론’을 제시하였다. 통상 경제논쟁에서 그가 주장한 ‘산출계수1’이 ‘시모무라 이론’의 주된 내용으로 받아들여지지만, 오히려 그 배경에 있는 학술적인 논의로서의 ‘유효산출’ 이론이야말로 ‘시모무라 이론’이라 할 수 있을 것이다. 시모무라는 투자와 투자회수의 메커니즘 분석에 있어서(시모무라오사무, 1958) 기업가의 역할을 중시하고 있다(회귀투자). 또한 그는 경제과정 전체를 피드백 시스템으로 여기고, 그 가운데 기업가의 행동이 수급 밸런스의 조정에 대하여 일정한 역할을 하는 것에 주목하여, 피드백 시스템에 내포되어 있는 자동제어장치와 같은 지위를 기업가에게 부여하고 있다(감응투자). 이상의 논의로부터, 경제논쟁에서 시모무라가 제시한 주장 “기업가의 자유로운 경제활동의 중요성”은, 경제의 피드백 시스템 기능에 주목한 그의 이론에 의해 뒷받침 되었다는 것을 알 수 있다. This paper aims to focus on the economic theories of Osamu Shimomura (1910-1989), who played a central role in the economic policy debates of the high-growth era in post-WW2 Japan. First, we will investigate two economic policy debates, “ZAIKO-RONSO(在庫論 )” and “SEICHO-RONSO(成長論 ),” from the beginning and on through the development period of the high-growth era in Japan. Focusing on economists’ ideal foundations behind the argument over the statistical data, we find that Shimomura placed great value on entrepreneurs rather than government control. Secondly, we will also investigate why Shimomura, in his economic theory, placed such emphasis on entrepreneurs. In the period immediately following WW2, Shimomura studied Keynes critically and subsequently developed his own economic theory with the unique concept of “effective output,” which builds on Keynesian economic theory. In general, Shimomura’s theory has been accepted as the claim of “output coefficient =1” within the journalistic context of the economic policy debates that he was involved in. However, the essence of his theory is “effective output,” which is the academic foundation of his claim in these debates. Analyzing the mechanism of investment and its return in the production process, Shimomura (1958) focused on the function of entrepreneurs (“replacement investment”). He viewed the whole economic process as a feedback system where entrepreneurs played a role to match demand with supply and regarded them as a device for stabilizing economic fluctuations built into the feedback system. In conclusion, we find that Shimomura’s claim in the economic policy debates, the importance of entrepreneurs in free enterprise against control and intervention by the government, has an academic foundation in his theory of economic fluctuations focusing to its feedback mechanism.

銀行資産構成の変化に見る拡張的金融政策の影響

佐東大作(SATO, Daisaku) 동아시아일본학회 2019 일본문화연구 Vol.0 No.69

2013년부터 시작된 일본의 ‘양적 질적 금융완화정책’에 따라 일본은행은 2년 이내 전년대비 2%의 물가상승률 실현을 목표로, 국채를 비롯한 각종 채권을 대량으로 매입했다. 그 결과, 시중은행에 대량의 자금이 쌓이며 은행의 자산 구성이 크게 변화한다. 목표 달성이 멀어진 데서 일본은행은 초과지준 일부에 마이너스 금리를 적용, 수익률곡선 통제정책을 채택하는 등 완화 규모를 서서히 확장했다. 본원통화의 확대를 목표로 한 비전통적 양적완화정책에서 금리를 목표로 한 전통적 금융정책으로 회귀한 것이다. 한편 급증한 통화량에도 실물경제 움직임과 설비투자 증가는 눈에 띄지 않는다. 버블 붕괴 후 일본 경제는 제조업 중심 산업구조에서의 전환이 요구되었는데, ‘양적 질적 금융완화정책’에 의해 운용처를 개척하지 못하여 대량의 초과지준을 떠안게 된 은행에게도 구조전환이 요구되고 있는 것은 아닐까. 전후 경제성장기에는 은행은 윤택한 가계저축을 기업과 정부에게 중개해왔다. 90년대 이후 가계저축의 감소 기업저축의 증가로 은행은 기업의 과잉자금을 국채 매입을 통해 정부에 중개, 그 국채를 일본은행이 매입하고 있다. 이러한 자금중개구조의 변화가 은행의 자산구성변화에 나타난다. In the “quantitative and qualitative monetary easing policy”(QQE) from 2013, the Bank of Japan(BOJ) has purchased a large number of bonds, including government bonds, with the aim of achieving 2% inflation rate year-on-year. As a result, private banks have accumulated large amounts of money and banks` asset structures have changed significantly. Being difficult to achieve these goals, BOJ has gradually expanding the easing scale, by applying negative interest rates and adopting a technique to control the yield curve. Non-traditional monetary policies aimed at quantity have returned to traditional monetary policies aimed at interest rates. On the other hand, capital investment and consumption do not increase easily. As banks cannot manage the operation of large excess reserves, it seems that the financial intermediation of banks’ traditional business model is changing. After the collapse of the bubble economy in Japan, the manufacturing-centered industrial structure has been required to change. Banks may also be required to change their structure due to the QQE. In the post-war growth economy, Japanese banks have loaned abundant household savings to corporations and the government. Since the 1990s, as household savings decreased and corporate savings increased, banks have loaned abundant corporate savings to the government through the purchase of government bonds, and BOJ has purchased the bonds. We can find such changes in the financial intermediary structure in changes in banks` asset structures.

Effect of Back Pressure on Droplet Size Near Diesel Injector Nozzle

( Shohei Yamamoto ),( Daisaku Sakaguchi ),( Hironobu Ueki ),( Masahiro Ishida ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-

A laser 2-focus velocimeter (L2F) with a micro-scale probe was used for measurements of the velocity and size of droplets in diesel sprays. The diameter of the nozzle orifice was 0.113 mm. The injection pressure was set at 40, 80, and 120 MPa by using a common rail system and the ambient pressure was set at 0.1 to 3.0 MPa. The focusing lens of the L2F was set inside a constant volume vessel, and a measurement position was located at 15 mm from the nozzle exit. It was confirmed that no droplet was observed by the L2F before the spray tip reached the measurement position in a high ambient pressure condition. The effect of the ambient pressure on the droplet velocity was found to be small in the near nozzle region. The droplet size decreased when the ambient pressure increased from 0.1 to 1.0 MPa. The droplet size increased when the ambient pressure equal to or increased higher than 2.0 MPa. These tendencies were verified by the KIVA-3V simulation.

Measurement of Mass Distribution in Diesel Fuel Spray by Using Micro-probe L2F

( Keisuke Komada ),( Daisaku Sakaguchi ),( Hironobu Ueki ),( Masahiro Ishida ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-

A laser 2-focus velocimeter (L2F) has been applied to measure the velocity and size of droplets in the dense region of diesel spray. Measurement was conducted on the fuel spray injected intermittently into the atmosphere from an injector nozzle with the orifice diameter of 0.113 mm. The injection pressure was set at 40 MPa by using a common rail system. The L2F had a micro-scale probe which consisted of two foci. The focal diameter was about 3 m, and the distance between two foci was 17 m. The data sampling rate of the L2F system was markedly high as 15 MHz. Measurement was conducted at 5 mm downstream from the nozzle exit. The local mass flow rate and the number density were calculated from the measured velocity, size, and arrival time of droplets. It was clearly shown that the mass flow rate was higher at the front of the spray than at the inside, and was higher at the spray center than at the peripheral portion of the spray. The accumulated mass flow in the spray section measured by the L2F was 43% of the injected fuel mass.

Development of Monorail-type Mobile Robot for Field Environment and Plant Status Monitoring

( Takashi Okayasu ),( Daisaku Arita ),( Takashi Yoshinaga ),( Rin-ichiro Taniguchi Eiji Inoue ),( Yasumar Hirai ),( Muneshi Mitsuoka ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

Field environmental and plant growth status monitoring is very important task to establish smart agriculture. Field monitoring device is usually installed only into the representative location in the field because of the management cost and complexity. Thus, their spatial distribution and time variation are not well grasped in actual cultivation. On the other hand, comprehensive analysis on the spatiotemporal field environmental and plant growth information is required in phenotyping researches. Various high-throughput plant phenotyping systems have been studied well and developed mainly in Europe and the US countries up to present. However, their systems are very expensive. Development of the low-price system is also required to create new cultivar and advanced agricultural production system. In this study, a monorail-type mobile robot for collecting field environment and plant status information was developed by using affordable devices such as a card-size microcomputer, sensors, and camera. Many of the robot frames were printed by 3D printer. The robot is driven by using two servo motors. The performance was verified by several conditions and then the spatiotemporal data measured was also evaluated.

Heat Transfer Enhancement in Forced Convective Field with a Corona Discharge

Yukio Tada,Akira Takimoto,Daisaku Ueda,Yujiro Hayashi 대한기계학회 1988 KSME/JSME THERMAL and FLUID Engineering Conference Vol.2 No.1