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Ohno, Yoshiharu,Iwasawa, Tae,Seo, Joom Beom,Koyama, Hisanobu,Takahashi, Hiroshi,Oh, Yeon-Mok,Nishimura, Yoshihiro,Sugimura, Kazuro American Thoracic Society 2008 American journal of respiratory and critical care Vol.177 No.10
<P>RATIONALE: Oxygen-enhanced magnetic resonance imaging (MRI) has been proposed as a useful tool for assessing regional morphological and functional changes in chronic obstructive pulmonary disease (COPD). OBJECTIVES: To prospectively and directly compare the efficacy of O(2)-enhanced MRI and quantitative computed tomography (CT) for smoking-related pulmonary functional loss assessment and clinical stage classification of smoking-related COPD. METHODS: One hundred sixty smokers were classified into four age- and gender-matched groups by using the GOLD criteria for smokers: Smokers without COPD (n = 40), Mild COPD (n = 40), Moderate COPD (n = 40), and Severe or Very Severe COPD (n = 40). All smokers underwent O(2)-enhanced MRI, multidetector-row CT, and pulmonary function test. Mean relative enhancement ratio on O(2)-enhanced MRI and CT-based functional lung volume (FLV) on quantitative CT were calculated. To compare the efficacy of O(2)-enhanced MRI and quantitative CT for pulmonary functional loss assessment, both indexes were correlated with pulmonary functional parameters. To determine the efficacy of two methods for clinical stage classification, the four clinical groups' mean relative enhancement ratio and CT-based FLV were statistically compared. MEASUREMENTS AND MAIN RESULTS: Correlations of both indexes with pulmonary functional parameters were significant (P < 0.0001). Pulmonary functional parameters and mean relative enhancement ratio for the four clinical groups showed significant differences (P < 0.05). CT-based FLVs of smokers without COPD and mild COPD were significantly different from those for moderate COPD and severe or very severe COPD (P < 0.05). CONCLUSIONS: O(2)-enhanced MRI is effective for pulmonary functional loss assessment and clinical stage classification of smoking-related COPD and quantitative CT.</P>
PRODUCTS OF DIFFERENTIATION AND COMPOSITION ON BLOCH SPACES
Ohno, Shuichi Korean Mathematical Society 2009 대한수학회보 Vol.46 No.6
We will consider the questions of when the products of composition and differentiation are bounded and compact on Bloch and little Bloch spaces.
WEIGHTED COMPOSITION OPERATORS ON THE MINIMAL MÖBIUS INVARIANT SPACE
Ohno, Shuichi Korean Mathematical Society 2014 대한수학회보 Vol.51 No.4
We will characterize the boundedness and compactness of weighted composition operators on the minimal M$\ddot{o}$bius invariant space.
Development of Centralized Voltage Control System for Distribution Systems
Ohno, Tetsufumi,Takano, Tomihiro,Itaya, Nobuhiko 대한전기학회 2013 The Journal of International Council on Electrical Vol.3 No.4
This paper proposes a centralized voltage control system for distribution system to meet the impact of PV growth. The system consists of a server machine at control center and many field devices like voltage regulators, line switches with sensor to measure power flow and voltage, and Information and Communication Technologies (ICT) network under Smart Grid paradigm. The system gathers measurement values from switches through the ICT network and chooses the best voltage profile and voltage regulators condition to achieve the profile with use of our advanced Optimal Power Flow. The test results at our Smart Grid facilities with 4MW photovoltaic generators are also given to prove the effectiveness of the developed system.
High-energy Photons and Particles in Space Environment
Ohno, Shin-ichi Korean Society of Photoscience 2002 Journal of Photosciences Vol.9 No.2
Space is full of energetic events emitting high-energy radiations which may be fatal to all living things unless protected. The present paper briefly describes high-energy photons and particles incident on Earth surface and their common properties toward living things. Role of radiation played in evolution of life and earth environment will be presented.
Ohno S.,Sasaki T.,Kohama T. Korean Society of Applied Entomology 2006 Journal of Asia-Pacific Entomology Vol.9 No.2
We compared the egg-hatching of Euscepes postfasciatus (Fairmaire) with and without moisture treatment to test whether moisture is necessary during egg incubation when a large number of eggs are gathered into a mass. Moisture treatment exhibited significant undesirable effects on hatching (reduction of hatchability, delay of hatching, and increase of the variance of hatching date) compared to no moisture treatment. In addition, moisture treatment significantly increased the incidence of fungus on the egg surface, which can subsequently contaminate the larval artificial diet. Based on these results, we concluded that moisture is not necessary for incubating E. postfasciatus eggs. Two possible explanations for the undesirable effects of moisture on hatching were discussed: a direct effect by preventing respiration of the eggs and an indirect effect through fungal infection of the eggs.