A5102003982- Fusion materials and technologies
- Software Engineering Research
- Nuclear Materials and Properties
- Software Reliability and Analysis Research
- Software Testing and Debugging Techniques
- Advanced Malware Detection Techniques
- Software Engineering Techniques and Practices
- Ion-surface interactions and analysis
- Open Source Software Innovations
- Software System Performance and Reliability
- Magnetic confinement fusion research
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced Software Engineering Methodologies
- Scientific Computing and Data Management
- Nuclear materials and radiation effects
- Web Data Mining and Analysis
- Muon and positron interactions and applications
- Intermetallics and Advanced Alloy Properties
- Manufacturing Process and Optimization
- Service-Oriented Architecture and Web Services
- Advanced Materials Characterization Techniques
- Plasma Diagnostics and Applications
- Nuclear Physics and Applications
Ritsumeikan University
2023-2024
Nagoya University
2005-2022
Waseda University
2019
Kyushu University
2006-2017
Nara Institute of Science and Technology
2011-2014
University of Wisconsin–Madison
2013
Osaka University
2008-2012
Software code review is an inspection of a change by independent third-party developer in order to identify and fix defects before integration. Effectively performing can improve the overall software quality. In recent years, Modern Code Review (MCR), lightweight tool-based inspection, has been widely adopted both proprietary open-source systems. Finding appropriate code-reviewers MCR necessary step reviewing change. However, little research known difficulty finding distributed development...
Mitigation of embrittlement caused by recrystallization and radiation is the key issue tungsten (W) based materials for use in advanced nuclear system such as fusion reactor applications. In this paper, our nanostructured W development performed so far to solve reviewed, including new original data. Firstly, basic concept mitigation shown. The approach has yielded ultra-fine grained, recrystallized (UFGR) W(0.251.5)mass%TiC compacts containing fine TiC dispersoids (precipitates). UFGR...
The effects of neutron and ion irradiations on deuterium (D) retention in tungsten (W) were investigated. Specimens pure W irradiated with neutrons to 0.3 dpa at around 323 K then exposed high-flux D plasma 473 773 K. concentration significantly increased by irradiation reached 0.8 at% 0.4 Annealing tests for the specimens 20 MeV ions showed that defects which play a dominant role trapping high temperature stable least up 973 K, while density decreased temperatures equal or above 1123 These...
Nanostructured tungsten (W)-based materials offer many advantages for use as plasma facing and components exposed to heavy thermal loads combined with irradiation high-energy neutron low-energy ion. This paper first presents the recent progress in nanostructured toughened, fine grained, recrystallized W materials. Thermal desorption spectrometry apparatus equipped an ion gun has been installed radiation controlled area our Center at Tohoku University systematically investigate effects of...
Metallic mirrors will be used as plasma-viewing elements in all optical and laser diagnostic systems ITER. In the harsh environment of ITER, performance decrease mainly because erosion their surfaces deposition impurities. The deterioration properties directly affect entire respective ITER diagnostics, possibly leading to shutdown. Therefore, R&D on is crucial importance for diagnostics. There a coordinated worldwide programme supervised by Specialists Working Group first International...
Effectively performing code review increases the quality of software and reduces occurrence defects. However, this requires reviewers with experiences deep understandings system code. Manual selection such can be a costly time-consuming task. To reduce cost, we propose reviewer recommendation algorithm determining file path similarity called FPS algorithm. Using three OSS projects as case studies, was accurate up to 77.97%, which significantly outperformed previous approach.
In this paper, we present a collection of Modern Code Review data for five open source projects. The showcases mined from both an integrated peer review system and code repositories. We easy-to-use richer structure to retrieve the (a) People, (b) Process, (c) Product aspects review. This paper presents extraction methodology, dataset structure, database dumps.
We present four datasets that are focused on the general roles of OSS peer review members. With data mined from both an integrated system and code source repositories, our rich comprise was automatically recorded. Using Android project as a case study, we describe extraction methodology, their application used for three separate studies. Our available online at http://sdlab.naist.jp/reviewmining/.
Code clone detection tools may report a large number of code clones, while software developers are interested in only subset clones that relevant to development tasks such as refactoring. Our research group has supported many with the tool CCFinder and its GUI front-end Gemini. Gemini shows sets (i.e., set identical or similar each other) several metrics including their length clones; however, it is not clear how use those extract interesting for developers. In this paper, we propose method...
Low-energy deuterium (D) plasma exposure on tungsten (W), which is an important material for ITER, results in blister formation the surface. Blister increases both micron-sized dust production and D retention. depends greatly surface pre-treatment. Deuterium mirror-finished powder metallurgy W at 500 K 3 h forms a with diameter of few hundred micrometres formations mechanically-polished helium-pre-exposed surfaces are drastically suppressed. retention also reduced compared that The...
Effects of annealing after/under iron (Fe) ion irradiation on deuterium (D) retention behavior in tungsten (W) were studied. The D2 TDS spectra as a function heating temperature for 0.1 dpa damaged W showed that the D was clearly decreased increased. In particular, desorption trapped by voids largely reduced at 1173 K. TEM observation indicated size dislocation loops grown, and its density above 573 After K, almost all recovered. results positron annihilation spectroscopy suggested...