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Okuma, Shigeo,Nakatsuka, Tadashi,Komazawa, Masao,Sugihara, Mitsuhiko,Nakano, Shun,Furukawa, Ryuta,Supper, Robert Korean Society of Earth and Exploration Geophysici 2006 지구물리와 물리탐사 Vol.9 No.1
Helicopter-borne aeromagnetic surveys at two different times separated by three years were conducted to better understand the shallow subsurface structure of the Vulcano and Lipari volcanic complex, Aeolian Islands, southern Italy, and also to monitor the volcanic activity of the area. As there was no meaningful difference between the two magnetic datasets to imply an apparent change of the volcanic activity, the datasets were merged to produce an aeromagnetic map with wider coverage than was given by a single dataset. Apparent magnetisation intensity mapping was applied to terrain-corrected magnetic anomalies, and showed local magnetisation highs in and around Fossa Cone, suggesting heterogeneity of the cone. Magnetic modelling was conducted for three of those magnetisation highs. Each model implied the presence of concealed volcanic products overlain by pyroclastic rocks from the Fossa crater. The model for the Fossa crater area suggests a buried trachytic lava flow on the southern edge of the present crater. The magnetic model at Forgia Vecchia suggests that phreatic cones can be interpreted as resulting from a concealed eruptive centre, with thick latitic lavas that fill up Fossa Caldera. However, the distribution of lavas seems to be limited to a smaller area than was expected from drilling results. This can be explained partly by alteration of the lavas by intense hydrothermal activity, as seen at geothermal areas close to Porto Levante. The magnetic model at the north-eastern Fossa Cone implies that thick lavas accumulated as another eruption centre in the early stage of the activity of Fossa. Recent geoelectric surveys showed high-resistivity zones in the areas of the last two magnetic models.
오쿠마아키코 ( Akiko Okuma ) 한국체육사학회 2011 체육사학회지 Vol.16 No.3
지금과는 달리 단오는 당시 한국의 중요한 명절로, 그네뛰기는 농업의 풍양과 여성의 생산을 기원하는 의미에서 단오의 중요한 세시풍속이었다. 이러한 단오의 중요한 민속놀이로 계승되어 온 그네뛰기는 근대에도 활발히 행해졌다. 그러나, 근대에 들어 그네뛰기는 크게 두 가지 변화를 겪었다. 먼저, 양력의 도입과 산업의 다양화로 인해 세시의 의미가 변화하면서, 단오절에 한정적으로 실시되던 그네뛰기가 시기에 관계없이 행해지게 되었다. 둘째, 그네뛰기가 경기화 볼거리화 된다. 지역마다 다양한 그네대회가 개최되었고 그것을 보기 위해 인파가 모여 관광열차가 운행되는 등 그네뛰기는 점차 스포츠화 되어가는 양상을 보인다. Dano as Korean major holidays unlike today, play on the swing is important seasonal customs of Dano that wish for a good harvest the fecundity. Play on the swing as inherited important folk game of Dano, has been done actively in the modern times. However, play on the swing after modern times suffered two main changes. First, according to the meaning change of seasonal customs due to introduction of solar calendar and the diversification of industry, the swing that played during Dano was to be done regardless of the time. Second, play on the swing became to event and competition. Play on swing seems to be turning into sport such as competitions were held on a variety of areas and crowd gathered to see it, tourist trains were on service.
An integrated airborne gravity survey of an offshore area near the northern Noto Peninsula, Japan
Komazawa, Masao,Okuma, Shigeo,Segawa, Jiro Korean Society of Earth and Exploration Geophysici 2010 지구물리와 물리탐사 Vol.13 No.1
An airborne gravity survey using a helicopter was carried out in October 2008, offshore along the northern Noto Peninsula, to understand the shallow and regional underground structure. Eleven flight lines, including three tie lines, were arranged at 2 km spacing within 20 km of the coast. The total length of the flight lines was ~700 km. The Bouguer anomalies computed from the airborne gravimetry are consistent with those computed from land and shipborne gravimetry, which gradually decrease in the offshore direction. So, the accuracy of the airborne system is considered to be adequate. A local gravity low in Wajima Bay, which was already known from seafloor gravimetry, was also observed. This suggests that the airborne system has a structural resolution of ~2 km. Reduction of gravity data to a common datum was conducted by compiling the three kinds of gravity data, from airborne, shipborne, and land surveys. In the present study, we have used a solid angle numerical integration method and an iteration method. We finally calculated the gravity anomalies at 300 m above sea level. We needed to add corrections of 2.5 mGals in order to compile the airborne and shipborne gravity data smoothly, so the accuracy of the Bouguer anomaly map is considered to be nearly 2 mGal on the whole, and 5 mGals at worst in limited or local areas.
( Mayumi Toyama ),( Yasuyuki Okuma ),( Mitsutoshi Yamamoto ),( Kenichi Kashihara ),( Kazuto Yoshda ),( Hidemoto Saiki ),( Tetsuya Maeda ),( Yoshio Tsuboi ),( Takeo Nakayama ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Parkinson`s disease (PD) is increasingly recognized as multidimensional disorder. In addition to classic motor symptoms, patients have a variety of non-motor symptoms (NMS) that substantially affect quality of life (QoL). However, the prevalence of NMS and the relative impact of non-motor symptoms on QoL in PD have not been well documented in Japanese PD patients. In this study, we have the following objectives: 1) To determine the prevalence of NMS in Japanese PD patients. 2) To study the impact of NMS on the QoL in Japanese PD patients. Methods: This was a multi-center cross-sectional epidemiologic study. We recruited outpatients from seven Neurology departments at general hospitals across Japan between October 2010 and September 2011. A total of 824 Japanese PD patients was included in this study. NMS of patients was evaluated by Non-Motor Symptoms Scale (NMSS). Parkinson`s Disease Questionnaire-39 (PDQ-39) was used to evaluate the QoL of PD patients. Multivariate analyses were used to evaluate the direct impact of NMSs on QoL using PDQ-39, after adjusting for age, sex, disease duration, and the Unifi ed Parkinson`s Disease Rating Scale (UPDRS) Part I, Part II, Part III and Part IV. Results: The mean of total NMSS score was 37.4±35.4. The highly prevalent NMSS domains were sleep/fatigue (87.6%) and urinary (86.1%). The highly prevalent NMSS items were nocturia (72.0%) and constipation (71.6%). In multivariate analyses after adjustment for age, sex, disease duration, UPDRS Part I, Part II, Part III, and Part IV, total score of NMSS has statistical signifi cance with PDQ-39 (p=0.00, ß=0.16, Adj-R squared=0.65). Conclusions: NMS were highly prevalent in Japanese PD patients. NMS have a direct negative impact on QoL in Japanese PD patients.
유완식,김영석,Shigeru Okuma 한국조명전기설비학회 1991 조명.전기설비 Vol.5 No.4
본 논문은 유한시간 정정응답 제어이론을 이용한 직류전동기의 속도제어에 대하여 논하였다. 유한시간 정정응답 제어계는 이산시간제어를 적용하므로 제어량 포화현상과 검출지연 문제가 발생하여 계통의 불안정을 초래한다. 이러한 문제를 해결하기 위하여 포화상태에서도 고속응답이 가능하도록 예측제어를 적용한 보상기를 제안한다. 실험 결과 지령치가 포화되지 않은 상태에서는 1샘플링시간으로 정정할 수 있었다. 지령치가 포화한 상태에서는 포화로부터 벗어난 후 1샘플링시간으로 정정할 수 있었다. 또한 예측제어를 적용하므로써 과도시의 오우버슈우트가 억제된 고속정정이 가능함을 알 수 있었다.