Materials Literature
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Geopolymers are amorphous, inorganic structures based on silicate and aluminate tetrahedrons and could be beneficial in thermal and fire resistant applications. The outcomes from this work suggest that fly ash geopolymer composites suitable for thermal applications can be produced. When compared to OPC based systems g…
Metal/Metal universal joints reinforced by carbon fibers had been proposed to save the energy and to enhance the mobility of mover machines. The ductile fracture occurred at aluminum part in the Ti/Al joint with carbon fiber reinforcement (CFR). Although the tensile strength (σ_b) was slightly reduced, its strain (ε_b…
We report for the first time thermal conduction tuning in phononic crystals. This tuning is based on the wave properties of phonons at low temperature, similarly to what can be done with photons.
Last few decades, many researchers have experimented with micro-scale compression or tension test, and have reported that the plastic behavior of crystalline materials with small dimensions is different from that of bulk. For designing microsystems, it is very important to understand deformation mechanism of nano- and…
Aminosilanized micro patterns were transferred on mica substrate using PDMS soft stamp fabricated by utilizing anisotropic etched Si substrate as a mold and proteoglycan molecular immobilization were investigated. Two types of parting agents were investigated to improve detachability of PDMS stamp from Si mold, and pi…
In the present study, the interface fracture toughness and adhesioln strength between a Ti coating film and Al-alloy substrate was evaluated using a laser spallation method. The fracture toughness and adhesion strength can be estimated using inverse analyses by the boundary element method using a transfer function com…
Magnesium substituted hydroxyapatite (Mg-HA) thin films were prepared using rf-magnetron sputtering method. The Mg-HA films were coated onto a Ti substrate from a mixed HA/MgO powder target, which were undertaken in an Ar gas. The molar ratio of Mg to Ca in the mixture target was varied in the ratio of 0:10, 2:8, 4:6,…
Nanoscale hybrids attract much attention of researchers nowadays. Rebar graphene is one of such hybrids. It means polycrystalline graphene which is reinforced by carbon nanotubes laid across its grain boundaries. In this paper, the tensile properties of rebar graphene are investigated by means of molecular-dynamics. S…
一槽式微生物燃料電池（MFC）を用いて乳酸が主要な有機物成分として含有されることを特徴とする食品製造系排水の処理特性を実験的に検討した．また，開回路系と酢酸模擬排水供給系を対照として，基本的な処理ならびに発電特性について比較を行った．その結果，実排水に対する有機物分解速度はMFCでは1.4 kgCOD/m3/dayに達し，開回路系の0.9 kgCOD/m3/dayに比べ約1.6倍に向上した．MFC内では乳酸の分解産物と考えられるプロピオン酸等の有機酸の分解速度が大きく上昇しており，このことが有機物分解速度向上に寄与した．また，MFC内では開回路系に比べGeobacter属の細菌群が高い割合で検出され，実排水処理においても発電のみな…
Bioactive nanocrystalline Fe doped hydroxyapatite (Fe: HAP) were successfully prepared through auto-combustion route. The synthesized samples were characterized by various physico-chemical methods. Thermal stability investigated using thermo-gravimetric and differential thermal analysis (TG-DTA). Structural characteri…
This paper reviews our recent progress of application studies on planer-surface-type and Pierce-gun-type nanocrystalline silicon (nc-Si) ballistic electron emitter arrays, which were designed and prototyped to be able to integrate with a separately fabricated active-matrix large scale integrated driving circuit for th…
This paper presents neutronics analysis mainly focused on key design issues for self-sufficient tritium production based on the conceptual design study carried out for a fusion DEMO reactor in the past several years, which includes new findings regarding the design methodology of breeding blanket. Self-sufficient prod…
Extraordinary optical transmission through Penrose metal hole arrays (PMHA) in the terahertz region is investigated numerically by using coupled-mode analysis. Spectral change of the transmittance is studied at resonant frequencies by increasing the number of holes and comparing the spectra of PMHA and a periodic meta…
To date, a number of useful techniques for nanolithography and nanostructure fabrication based on atomic force microscope (AFM) have been studied and developed; they include mechanical modification, local anodic oxidation (LAO), and metal-assisted chemical etching of germanium (Ge) surfaces in water by using platinum…
Focused ion beam (FIB) is well known as a powerful tool for directly forming micro/nano-scale 3D mechanical structures without photolithography. By using FIB with Ga+ ions, we are able to conduct local etching as well as Ga+ ion implantation. The combination of the ion doping and alkali wet etching to a single crystal…
Graphite cross section differs among various evaluated nuclear data libraries as a result of distinct theoretical models and experimental technologies which are utilized by different nuclear data organizations all over the world. It has been revealed that graphite cross section plays a significant role in criticality…
Migration property of fibroblast cultured
This paper presents an experimental evaluation of the performances of the quasi-current-error method realized in the dq rotating reference frame. The method provides a similar level of performances to that using actual current errors.
The behavior of the graphite dust is important to the safety of High Temperature Gas-cooled Reactors. The present study focuses on the forces which make the graphite dust attach or detach from the surface in HTGR. The effect of graphite dust size, the fluid velocity and the surface energy between the particles and the…
In order to understand the transformation characteristics of Ti Ni shape memory alloys, it is crucial to know its fundamental atomic structure. While many sources have provided detailed explanations about the basic theory of martensitic transformations, it is hard for engineers who do not have expertise in metallurgy…