Kento Kawakita

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This paper reports a modification of an interferometric technique [H. Tsuchida et al., "A Novel Technique for Measuring the Frequency Deviation of Semiconductor Lasers under Direct Modulation," Jpn. J. Appl. Phys. 22, L19-L21 (1983)] for measuring the frequency deviation and phase difference between the AM and FM modulation of semiconductor laser diodes.(More)
The purpose of this study was to update the floristic inventory found in the Upper Paraná River floodplain. Floristic surveys were performed from February 2000 through March 2008, as part of the Brazilian Long-Term Ecological Research Program (PELD/CNPq-Site 6). The material collected was identified from 774 species, 442 genera, and 116 families. The ten(More)
This paper presents a method to determine human motion for upper limb rehabilitation. In the rehabilitation training, appropriate load should be given to each part of the human body such as joints and muscles based on the patient's conditions and symptom. Such load is changed according to the kinematic and dynamic properties of multi-link body motion. On(More)
Electron-rich organosilicon compounds, such as 1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene (2a), 2,5-dimethyl-1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene (2b), 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene (2c), and 1,1'-bis(trimethylsilyl)-1,1'-dihydro-4,4'-bipyridine (4), served as versatile reducing reagents(More)
The organosilicon reducing reagent 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-diaza-2,5-cyclohexadiene (1a) was used for the one-electron, salt-free reduction of ((t)BuN═)NbCl3(py)2 (2), resulting in the formation of a neutral, triply chloride-bridged dinuclear niobium(IV) complex, [((t)BuN═)ClNb(py)](μ-Cl)3[((t)BuN═)Nb(py)2] (3) in moderately high(More)
Alkene metathesis is a widely and increasingly used reaction in academia and industry because of its efficiency in terms of atom economy and its wide applicability. This reaction is notably responsible for the production of several million tons of propene annually. Such industrial processes rely on inexpensive silica-supported tungsten oxide catalysts,(More)
Smectite, a synthetic inorganic polymer with a saponite structure, was subjected to matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS). Typical organic matrix molecules 2,4,6-trihydroxyacetophenone (THAP) and 2,5-dihydroxybenzoic acid (DHBA) were intercalated into the layer spacing of cation-exchanged smectite, and the complex was used(More)
Dinuclear titanium dialkyl complexes bridged by two μ-arylimido ligands, [CpTi(CH2 SiMe3 )(μ-NAr)]2 (Cp=cyclopentadienyl) activated an ortho-aryl C-H bond of an μ-arylimido ligand to form a four-membered titanacycle. The subsequent insertion reaction of 1-(trimethylsilyl)propyne into a metal-carbon bond of the four-membered titanacycle yielded the(More)
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