A5026553349- Oceanographic and Atmospheric Processes
- Photovoltaic System Optimization Techniques
- Electrochemical Analysis and Applications
- Spinal Cord Injury Research
- Advanced DC-DC Converters
- Silicone and Siloxane Chemistry
- Exercise and Physiological Responses
- Advancements in Battery Materials
- Magnetic Properties and Synthesis of Ferrites
- Conducting polymers and applications
- Electrocatalysts for Energy Conversion
- Chalcogenide Semiconductor Thin Films
- Synthesis and properties of polymers
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Thermoelectric Materials and Devices
- Advanced Wireless Communication Techniques
- Wireless Communication Networks Research
- Fuel Cells and Related Materials
- Organic Electronics and Photovoltaics
- Sports injuries and prevention
- Advanced Semiconductor Detectors and Materials
- Geology and Paleoclimatology Research
- Magnetic properties of thin films
- Advanced Polymer Synthesis and Characterization
- Spectroscopy and Quantum Chemical Studies
The University of Tokyo
2021-2024
Yamagata University
2004-2023
Ibaraki University
2007-2022
Hitachi (Japan)
2021-2022
JR Tokyo General Hospital
2021-2022
Sphere Institute
2020-2021
Chiba University
2012-2021
Midorigaoka Hospital
2021
Duke University
2021
Osaka University
2010-2020
Charge transport processes in nonconjugated redox-active polymers with electrolytes were studied using a diffusion-cooperative model. For the first time, we quantitatively rationalized that limited Brownian motion of redox centers bound to resulted 103–4-fold decline bimolecular and heterogeneous charge transfer rate constants, which had been unexplained for half century. As next-generation design, supramolecular system high physical mobility was proposed achieve constant as free solution...
Squaraine dyes are considered an important group of photoactive materials in the field organic photovoltaic devices. In this work, we purposely tuned side chains and number hydroxyl (OH) groups a series squaraine (SQ) dyes, i.e., SQ1–4, to investigate effect structural variations on material properties as well performance these donor bulk heterojunction (BHJ) cells. The structure SQs were systematically characterized using various tools. Solution-processed BHJ cells based SQ compounds...
We have measured the enhanced Raman scattering by a liquid (methyl alcohol) in contact with an evaporated film of silver (\ensuremath{\sim}400 \AA{}) deposited on flat surface hemispherical prism. The exciting laser light (5145 was incident through prism and scattered from collected also Raman-scattering intensity is sharp function both angles. observed angular dependence can be fitted remarkably well assuming that process mediated surface-plasmon polaritons at silver-liquid interface....
A series of soluble squaraine derivatives has been designed and developed as a donor material for solution-processible organic photovoltaic cells. In combination with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) an acceptor, we obtained power conversion efficiency 4.86% from bulk-heterojunction
We present a method for fabricating photonic crystals (PCs) by polymerization-induced microphase separation of block copolymers (BCPs). Molecular weight BCP PCs is so large that it has been difficult conventional solution casting and annealing methods to complete the form periodically ordered submicron structures. Our overcomes difficulty inducing transitions during polymerization, when molecular BCPs small enough transitions. The microphase-separated structure then enlarged while...
For rapid charging of lithium-ion batteries, a series novel electrode-active materials have been studied. However, those suffered from replacing conventional metal oxides, such as LiCoO2 and LiFePO4, because the strict performance criteria for commercialization. As an alternative approach, we propose hybridization inorganic active with organic redox-active polymers which are characterized by fast electrode kinetics. A new robust organic-radical-substituted polyether was synthesized to yield...
When we reuse a code fragment in an open source system, it is very important to know the history of code, such as origin and evolution. In this paper, propose integrated approach tracking for repositories. This takes query its input, returns fragments containing clones with code. It utilizes publicly available search engines external resources. Based on model, have designed implemented prototype system named Ichi Tracker. Using Tracker, conducted three case studies. These studies show...
In Open Source System (OSS) development, software components are often imported and reused; for this reason we might expect that files copied in multiple projects (file clones). paper, propose a file clone detection tool called FCFinder show the analysis performed with it on FreeBSD Ports Collection, large OSS project collection. We found many clones among similar or related projects, which systematically introduced from base projects.
When we reuse a code fragment in an open source system, it is very important to know the history of code, such as origin and evolution. In this paper, propose integrated approach tracking for repositories. This takes query its input, returns fragments containing clones with code. It utilizes publicly available search engines external resources. Based on model, have designed implemented prototype system named Ichi Tracker. Using Tracker, conducted three case studies. These studies show...
New applications of high resistivity magnetic films, such as Fe–Hf–O and Co–Fe–Hf–O thin film inductors flux gate sensors, were investigated. These soft films with nanocrystalline structure deposited on glass substrate by using the oxygen reactive sputtering method. Planar sandwich developed or had a higher quality factor than that an amorphous Co–Ta–Hf inductor. The dc–dc converter Fe(Co–Fe)–Hf–O inductor conversion efficiency. also applied to sensor operated at frequencies over 1 MHz. Both...
Abstract. Sedimentary 231Pa/230Th ratios provide clues to estimate the strength of past ocean circulation. For its estimation, understanding processes controlling distributions 231Pa and 230Th in is important. However, simulations dissolved particulate modern ocean, recently obtained from GEOTRACES project, remain challenging. Here we report a model simulation global with COCO ver4.0. Starting basic water-column reversible scavenging model, also introduced bottom dependence efficiency on...