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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.
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.
Ohno, S.,Sasaki, T.,Kohama, T. Korean Society of Applied Entomology 2007 Journal of Asia-Pacific Entomology Vol.10 No.3
Mass rearing the West Indian sweetpotato weevil, Euscepes postfasciatus (Fairmaire), using artificial diets is essential for eradicating this serious sweetpotato pest by the sterile insect technique. We tested the use of the furcellaran solution (a viscous liquid, hereafter FS) as an egg-seeding agent on an artificial diet as an important step in extending small-scale rearing of this species to a mass-rearing technique. We recently detected no effect of FS on egg hatching; however, this study revealed significant adverse effects of FS on post-hatching survival and development of the species, i.e. more than 50% reduction in the survival rate and a 1.3- to 1.5-fold extension of the development period. The number of larvae remaining on the diet surface but not feeding into the diet was consistently higher in the FS-treated groups throughout the experiment period. These results suggests that FS may physically or chemically inhibit the normal feeding of larvae, leading to the observed adverse effects on survival and development of insects. The survival rate among FS-treated replicates was significantly related to variations of the diet conditions (shrunk by desiccation) that might be caused by uncontrollable environmental differences. The shrunk diets yielded two to three times more adults than those not shrunk. This implies that post-hatching survival of E. postfasciatus can be improved by drying the contents of the rearing trays after egg-seeding.
Preparation of Ultrafine Au-Pb Particles by Gas-evaporation Technique
Ohno Takehisa,Funaguchi Hironori 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Ultrafine Au-Pb particles prepared by two method, (1) simultaneous evaporation of Au and Pb in inert gas and (2) subsequent vapor condensation of Pb in a differentially evacuated tube onto flying Au nanoparticles prepared by gasevaporation technique, were observed by electron microscopy. In the method (1), the particles that grew at the region where the two smoke masses converged, consisted of alloy phases. In the method (2), the particles consisted of two or three phases of Au, , and Pb phases in turn from the inner part, Pb-rich particles being composed of only two phases of and Pb.
Stomach microbiota, Helicobacter pylori, and group 2 innate lymphoid cells
Ohno Hiroshi,Satoh-Takayama Naoko 생화학분자생물학회 2020 Experimental and molecular medicine Vol.52 No.-
The stomach has been thought to host few commensal bacteria because of the existence of barriers, such as gastric acid. However, recent culture-independent, sequencing-based microbial analysis has shown that the stomach also harbors a wide diversity of microbiota. Although the stomach immune system, especially innate lymphoid cells (ILCs), has not been well elucidated, recent studies have shown that group 2 ILCs (ILC2s) are the dominant subtype in the stomach of both humans and mice. Stomach ILC2s are unique in that their existence is dependent on stomach microbiota, in sharp contrast to the lack of an impact of commensal microbiota on ILC2s in other tissues. The microbiota dependency of stomach ILC2s is partly explained by their responsiveness to interleukin (IL)-7. Stomach ILC2s express significantly higher IL-7 receptor protein levels on their surface and proliferate more in response to IL-7 stimulation in vitro than small intestinal ILC2s. Consistently, the stomach expresses much higher IL-7 protein levels than the small intestine. IL-5 secreted from stomach ILC2s promotes immunoglobulin (Ig) A production by plasma B cells. In a murine model, stomach ILC2s are important in containing Helicobacter pylori infection, especially in the early phase of infection, by promoting IgA production.
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.