Nobuo Tanaka

Learn More
Arguably active noise control enables the sound suppression at the designated control points, while the sound pressure except the targeted locations is likely to augment. The reason is clear; a control source normally radiates the sound omnidirectionally. To cope with this problem, this paper introduces a parametric array loudspeaker (PAL) which produces a(More)
A polyacrylamide (PAAm)-modified monolithic silica capillary column of increased phase ratio, 200T-PAAm, for hydrophilic interaction liquid chromatography (HILIC) was prepared. The column showed high separation efficiency, with a theoretical plate height H = 7-20 microm at a linear velocity, u = 1-7 mm/s. From a kinetic plot analysis, it was expected that(More)
The ability to observe chemical reactions at the molecular level convincingly demonstrates the physical and chemical phenomena occurring throughout a reaction mechanism. Videos obtained through in situ transmission electron microscopy (TEM) revealed the oxidation of catalytic soot under practical reaction conditions. Carbon oxidation reactions using Ag/SiO2(More)
Acoustic cluster control is proposed for the purpose of achieving global sound attenuation of a planar structure. First, acoustic cluster filtering using a point sensor array is presented, which enables the grouping of sound radiated from a target object into a set of clusters, such that each cluster possesses the same common characteristics. This allows(More)
The hyperthermophilic archaeal sulredoxin from Sulfolobus tokodaii is a water-soluble high-potential Rieske [2Fe-2S] protein with unique pH-dependent redox properties compared with its mesophilic homologues in cytochrome bc1/b6f complexes. The oxidized recombinant sulredoxin has been crystallized by the hanging-drop vapour-diffusion method using 30%(v/v)(More)
SiO2/Si(100) interfaces were for the first time observed by a spherical aberration-corrected high-resolution transmission electron microscope in a cross-sectional mode. As the Fresnel fringes were not contrasted at the interfaces, the interfacial structures were clearly observed without the need for artificial image contrast. Atomic steps and defects on the(More)
The sedative and hypnotic properties of propofol were studied in 40 patients undergoing elective gynecologic or orthopedic surgery using epidural (epidural group, n = 20) or spinal (spinal group, n = 20) anesthesia. Patients were given a bolus dose of 1 immediately followed by a continuous infusion of 4 of propofol after epidural or(More)
  • 1