A5065639600- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Superconducting Materials and Applications
- Advanced MRI Techniques and Applications
- Fusion materials and technologies
- Lymphatic System and Diseases
- Quantum chaos and dynamical systems
- Engineering Applied Research
- Cardiac Imaging and Diagnostics
- Ultrasound and Hyperthermia Applications
- Optical Systems and Laser Technology
- Mechanical Engineering and Vibrations Research
- Gyrotron and Vacuum Electronics Research
- Cerebrovascular and Carotid Artery Diseases
- MRI in cancer diagnosis
- Nuclear reactor physics and engineering
- Antenna Design and Analysis
- Diagnosis and Treatment of Venous Diseases
- Intracranial Aneurysms: Treatment and Complications
- Cardiovascular Health and Disease Prevention
- Dust and Plasma Wave Phenomena
- Radiomics and Machine Learning in Medical Imaging
Kyoto University
1980-2024
Japan Healthcare University
2022
Tokyo Health Care University
2022
Nagoya University
2014-2020
Sumitomo Riko (Japan)
2009-2010
Hirosaki University Hospital
2010
Aomori Rosai Hospital
2009
Suzuka University of Medical Science
2004-2005
Suzuka University
2004
Akita University
1995
Physics knowledge (theory and experiment) in energetic particles relevant to design of a reactor scale tokamak is reviewed, projections for ITER are provided this Chapter the Basis. The review includes single particle effects such as classical alpha heating toroidal field ripple loss, well collective instabilities that might be generated plasmas by particles. overall conclusion fusion expected provide an efficient plasma ignition sustained burn next step device. major concern localized heat...
In recent years, 4D flow MRI has become increasingly important in clinical applications for the blood vessels whole body, heart, and cerebrospinal fluid. advantages over 2D cine phase-contrast (PC) that any targeted area of interest can be analyzed post-hoc, but there are some factors to considered, such as ensuring measurement accuracy, a long imaging time post-processing complexity, interobserver variability.Due partial volume phenomenon caused by low spatial temporal resolutions, accuracy...
For the numerical simulation of electron cyclotron resonance plasma production, a two-dimensional model that describes wave propagation and transport is developed. The modeling code calculates profiles electromagnetic fields, power absorption electrons, temporal evolution densities in bounded, inhomogeneous, cylindrical system. calculation production mirror magnetic field shows property very sensitive to antenna location.
In order to prepare adequate current ramp-up and ramp-down scenarios for ITER, present experiments from various tokamaks have been analysed by means of integrated modelling in view determining relevant heat transport models these operation phases. A set empirical L-mode (namely, the Bohm–gyroBohm model scaling based with a specific fixed radial shape energy confinement time factors H96−L = 0.6 or HIPB98 0.4) has validated on multi-machine experimental dataset predicting li dynamics within...
A 28~GHz system with a high-power gyrotron tube has been used for the QUEST spherical tokamak to form an over-dense plasma electron Bernstein wave heating (EBWH) and current drive 8.2~GHz-wave. Non-inductive high-density ramp-up experiments dual-frequency (dual$-f$) cyclotron (EC) [ 8.2~GHz ] waves were conducted. spontaneous density jump (SDJ) state was observed as bifurcation phenomenon in dual$-f$ experiment. The on 8.2~GHz-wave non-inductively ramped up 25~kA, maintained 0.4~s under...
High-energy tail formations due to the monochromatic wave in a magnetized plasma are studied numerically and analytically. By calculating phase space trajectories of 10 000 particles, initially Maxwell-velocity-distributed, presence uniform magnetic field sinusoidal traveling closely perpendicular direction with frequency cyclotron harmonics, some properties particle acceleration clarified. The mechanism can be described by modification trapping theory two types stochastic acceleration....
We aim to elucidate the effect of spatial resolution three-dimensional cine phase contrast magnetic resonance (3D PC MR) imaging on accuracy blood flow analysis, and examine optimal setting for using phantoms.The phantom has five types acrylic pipes that represent human vessels (inner diameters: 15, 12, 9, 6, 3 mm). The were fixed with 1% agarose containing 0.025 mol/L gadolinium agent. A blood-mimicking fluid property values was circulated through at a steady flow. Magnetic (MR) images...
ECCD system design activities for JA DEMO is in progress. Activities contains physical analysis, launcher design, and RF power plant design. The analysis activity explores various approaches to enhance efficiency. produced a conceptual of 100 MW class plant. presented the upper equatorial port tokamak vacuum vessel analyzed operation each launcher. result achievement deposition at core plasma by selecting proper injection angle frequency.
This paper discusses the issue of carbody excitation railway vehicles due to rotation imbalanced wheelsets and proposes a simple cost-effective countermeasure. The basic mechanisms are first described, then displacement-dependent rubber bush, which is used for connection between bogie frame carbody, proposed. property realized by introducing small gap inner fixture, transmission force with high-frequency displacement isolated gap. can be created naturally just skipping bonding process so it...
Background: Breast cancer-related lymphedema (BCRL) is a chronic swelling of the arm due to breast cancer treatment. Lymphedema diagnosed and staged on basis limb circumference measurements patient's subjective symptoms, which have poor reproducibility objectivity: these cannot detect any fluid accumulation in tissue. Ultrasonography feasible noninvasive technique that can be used evaluate tissue structure real time. This study aimed assess ability texture features for discriminating...
The power deposition profiles were analyzed with a multiple ray tracing code for the Electron Bernstein Wave Heating and Current Drive (EBWH/CD) experiments in QUEST. In EBWH/CD QUEST, OXB mode conversion scenario was selected plasma current sustainment rather low-density case. algorithm wave penetration through evanescent layer beyond O-mode cutoff position developed multiple-ray analysis. launching antenna positions considered to obtain significant absorption specific propagating direction...
It is believed that hyperthermia will show anti-tumor effects at the temperature over 42.5 degrees. But we found mild as under degrees still shows due to immunological activity. We used C3H mice bearing SCC-VII tumor. These were heated of 39-41 by 1 hour in controlled water bath. After giving hyperthermia, white blood cells (WBC), lymphocyte (LyC), NK cell activity increased compared with pre-heat condition. The delays tumor growth was observed after mild-hyperthermia. activated WBC, LyC and...
Background: Manual lymph drainage (MLD) is one of the common treatments for breast cancer-related lymphedema (BCRL). Although primary goal MLD to drain excessive fluid accumulated in affected upper limb and trunk an area body that drains usually, use decided based on swelling subjective symptoms, without assessing whether there region. The purpose this study was examine truncal distribution a sample BCRL patients investigate any correlation between such or symptoms. Methods Results: An...