Yoshimasa Sakai

Computer-aided demarcation of early gastric cancer: a pilot comparative study with endoscopists

Satoko Takemoto, Keisuke Hori, Yoshimasa Sakai, Masaomi Nishimura et autres

jp (code pays fourni par la source)

Finite element analysis method for electromagnetic induction to telecommunication line by MAGLEV train

Masamitsu Tokuda, Yoshimasa Sakai, Junki Yarita, Atsuhiro Nishikata

Abstract When a magnetic levitation rail carrying a superconducting coil moves at high speed, an electromagnetic induction voltage is generated in the surrounding telecommunication line due to Faraday's electromagnetic induction. This phenomenon is analyzed by AC/DC module of COMSOL multiphysics. The telecommunication …

jp (code pays fourni par la source)

Finite Element Analysis Method for Electromagnetic Induction to Telecommunication Line by MAGLEV Train

Masamitsu Tokuda, Yoshimasa Sakai, Junki Yarita, Atsuhiro Nishikata

When a magnetic levitation rail carrying a superconducting coil moves at high speed, an electromagnetic induction voltage is generated in the surrounding telecommunication line due to Faraday’s electromagnetic induction. This phenomenon is analyzed by AC/DC module of COMSOL Multiphysics. The telecommunication line …

jp (code pays fourni par la source)

COMSOL Analysis for Electromagnetic Induction to Telecommunication Line by MAGLEV Train

Masamitu Tokuda, Yoshimasa Sakai, Junki Yarita, Atsuhiro Nishikata

When a magnetic levitation rail carrying a superconducting coil moves at high speed, electromagnetic induction voltage is generated in the surrounding telecommunication line due to Faraday's electromagnetic induction, but this phenomenon is analyzed by AC / DC module of COMSOL. The telecommunication …

jp (code pays fourni par la source)

Analysis method for magnetically coupled loop system with relative motion for calculating electromagnetic induction by MAGLEV train

Yoshimasa Sakai, Atsuhiro Nishikata, Tokuda Masamitsu

Noncontact coating processing of small object levitated in ultrasonic standing wave field

Kentaro Nakamura, Yoshimasa Sakai

Non-contact processing is an attractive technology for synthesizing new materials and pharmaceutical industry. A technique based on ultrasonic standing waves is a promising method to levitate small object or droplet without contact in air because it is applicable for any materials and …

jp (code pays fourni par la source)

Noncontact coating processing of small object levitated in ultrasonic standing wave field

Kentaro Nakamura, Yoshimasa Sakai

As one of the required functions in noncontact manipulation system of small part or droplet in air, coating of small ball is studied in this report. A small object with the diameter of several millimeters is levitated at the nodal position of …

jp (code pays fourni par la source)

Noncontact coating processing of small object levitated in ultrasonic standing wave field

健太郎 中村, KENTARO NAKAMURA, 芳将 酒井, Yoshimasa Sakai

Direct patterning of poly(3-hexylthiophene) and its application to organic field-effect transistor

Yuta Saito, Yoshimasa Sakai, Tomoya Higashihara, Mitsuru Ueda

A direct photolithographic patterning method of regioregular poly(3-hexylthiophene) (rr-P3HT) as a semiconductive layer of organic field-effect transistors (OFETs) has been developed. The performance (0.092 cm2/Vs) of a bottom-contact type OFET using the patterned rr-P3HT as a semiconductive layer was almost the same …

jp (code pays fourni par la source)

Bis(methylthio)tetracenes: Synthesis, Crystal-Packing Structures, and OFET Properties

Takakazu Kimoto, Kenro Tanaka, Masatoshi Kawahata, Kentaro Yamaguchi et autres

5,12-Bis(methylthio)tetracene (2) and 5,11-bis(methylthio)tetracene (3) were synthesized. DFT calculations indicate that the HOMO and LUMO energy levels of 2 and 3 are lowered by 0.13-0.24 eV and their HOMO-LUMO energy gaps are reduced by 0.1 eV relative to those of tetracene. X-ray …

jp (code pays fourni par la source)

Bithiophene–bithiazole alternating copolymers with thiophene side chains: Synthesis by organometallic polycondensation and chemical properties of the copolymers

Takakazu Yamamoto, S. Otsuka, Hiroki Fukumoto, Yoshimasa Sakai et autres

New bithiophene–bithiazole alternating copolymers with thiophene side chains at the bithiazole unit have been prepared. The copolymers show a strong tendency to self-assemble and align on the surface of substrates, similarly to related copolymers with alkyl side chains at the bithiazole unit.

jp (code pays fourni par la source)

π‐Conjugated Polymers Consisting of Isothianaphthene and Dialkoxy‐p‐phenylene Units: Synthesis, Self‐Assembly, and Chemical and Physical Properties

Takakazu Yamamoto, Motoaki Usui, Haruki Ootsuka, Takayuki Iijima et autres

Abstract A series of π‐conjugated alternating copolymers consisting of Th‐ITN‐Th and p‐C6H2(OR)2 units were synthesized. XRD indicated that the copolymers assume an interdigitation packing mode, and UV‐Vis spectra revealed a strong tendency for self‐assembly. Upon molecular assembly of the copolymer, the UV‐Vis …

jp (code pays fourni par la source)