Publications by authors named "F Kuwashima"
Article Synopsis
- - A new traction device for gastric endoscopic submucosal dissection (ESD) was developed to improve the technique by allowing for different direction adjustments during the procedure.
- - In a study comparing conventional ESD (75 patients) to traction-assisted ESD (73 patients), the main focus was on how long the procedures took.
- - Results showed similar overall procedure times between the two methods, but traction-assisted ESD was faster for lesions located in the upper or middle stomach's lesser curvature, indicating potential efficiency benefits in specific cases.
The stability of optical beats in a chaotically oscillating laser is compared to that of a free-running continuous-wave laser using a highly efficient plasmonic photomixer. Using a chaotically oscillating laser diode, stable optical beats are observed over an operation current range of 60-90 mA. The optical spectra are stable even with frequent mode hopping.
View Article and Find Full Text PDFBackground And Aim: Nodular gastritis is caused by infection and is associated with the development of diffuse-type gastric cancer. This study examined the clinical characteristics of patients with nodular gastritis, including cancer incidence before and after H. pylori eradication.
View Article and Find Full Text PDFThis paper describes the plasmonic modes in the parabolic cylinder geometry as a theoretical complement to the previous paper (J Phys A 42:185401) that considered the modes in the circular paraboloidal geometry. In order to identify the plasmonic modes in the parabolic cylinder geometry, analytic solutions for surface plasmon polaritons are examined by solving the wave equation for the magnetic field in parabolic cylindrical coordinates using quasi-separation of variables in combination with perturbation methods. The examination of the zeroth-order perturbation equations showed that solutions cannot exist for the parabolic metal wedge but can be obtained for the parabolic metal groove as standing wave solutions indicated by the even and odd symmetries.
View Article and Find Full Text PDFGeneralized synchronization of chaos in He-Ne lasers.
Phys Rev E Stat Nonlin Soft Matter Phys
July 2003
We experimentally demonstrate synchronization of chaos in one-way coupled He-Ne lasers with optical feedback. We observe different types of synchronization such as identical synchronization, inverse synchronization, and random amplification. These dynamics are maintained only for a short duration of several hundred milliseconds.
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