Influence of electron beam irradiation on hardness, brittleness and fracture toughness of borosilicate glass were studied. Low energy electron beam irradiations is expected for improvement method for material surface. The EB irradiation reduced the brittleness and enhanced fracture diameter, fracture load and fracture toughness of borosilicate glass surface. The fracture toughness enhancement can be explained by stress relaxation induced by increase in density of dangling bonds.
A mechanical device driven by volume change in the course of H2 sorption reaction by hydrogen storage alloy was made up and tested. To investigate the effect of electric current on the mechanical strain, in this study, electric resistance and mechanical starin were measured under various electric currents. From the results obtained, the test device could be expected as an artificial muscle driving with H2 sorption reaction, which could be controlled by electric current.
We investigated the effectiveness of acupuncture point stimulation device on cognitive disturbances and its effect of peripheral symptom in person suffering from senile dementia. The evaluation was examined by using HDS-R (Hasegawa's Dementia Rating Scale), ADL (Activities of Daily Living), and POMS (profile of Mood states). As a result, HDS-R scores, ADL scores (Abnormal Behavior and Emotional Faculty items) and POMS scores (Tension-Anxiety and Fatigue items) of the Rehabilitation group were significantly higher than those of the Control group.
Line electrodes was installed in parallel the bottom of the water surface, and over the water surface. Moreover, the DC voltage was applied between the Line electrodes. LB molecule is distribution by passing through between these interelectrodes. This technology is possible to give high optical-electronic functionality to accumulation film.
A biochemical-pump was constructed using a dialysis cell with catalase immobilized membrane, in which active pressure was produced by enzymatic reaction with hydrogen peroxide (H2O2) concentration. The biochemical-pump system provided non-pulsating flow. The flow injecton analysis (FIA) system was also fabricated using a photodiode sensor and the biochemical-pump with carrier solution including luminol and horseradish peroxidase (HRP), thus detection chemiluminescence (CL) indused by the injection H2O2.
A15 Nb3Al has gained much interests for high-field and large-scale applications due to its excellent critical current density Jc and strain tolerance. However, the shift of Nb3Al composition from stoichiometry at temperatures below 1900°C causes difficulties in the fabrication of conductors with inherent Nb3Al characteristics. In this study, Nb3Al powders prepared by arc melting in an Ar / H2 atmosphere were encased in a sheath and fabricated into tapes through the ex-situ PIT (Powder in Tube) process. The present study revealed that the oxygen content in the Nb3Al powder plays a crucial role in yielding large Jc in the tape. Furthermore, the addition of Ag powder to the Nb3Al powder was found to appreciably enhance the Jc of the tape in lower fields. The superconducting performance of the tapes is discussed in relating to their structures.
The oxide scale on Fe-3Si alloy was studied in oxygen for 0.03 ∼ 3.72 ks at 1073 K. The formation of blister on the Fe-3Si alloy was observed after oxidation at 1073 K for 0.12 ks. The blister was 100 ∼ 200 μm in size, and its oxide scale was about 1 μm in width. The concentration of oxygen was observed at the underlying surface of blister. The oxide scale on the Fe-3Si alloy was spherical and insular in shape at the early stages of oxidation, and grew laterally, and then changed to planar oxide scale layer.
Thermal recovery of used cooking oil yielded in a university campus was examined. The used oil was directly combusted for generating hot water. Because the oil obtained contains much amount of solid impurities and water, ultra sonic treatment was carried out for preparing fuel from the waste. Simple assessment on the CO2 emission resulted in the reduced emission, which could be emphasized by longer utilization. The limited oil amount yielded and also the discontinuous thermal demand in the university campus were the important factors for completing the utilizing system.
Magnetostrictive characteristics of Fe-Al alloy thin films formed by an ion plating process were discussed. Fe-17 at%Al alloy thin films formed by the ion plating process at 333 K and 532 K showed the larger magnetostriction of 90 ppm at 15 kOe than that of pure Fe with lattice expansion. The film sample prepared at 523 K showed the higher magnetostrictive susceptibility at low magnetic fields than that of the film sample prepared at 333 K.
Influence of ultraviolet ray on photo inductive effects of Anatase-type titanium dioxide film was investigated. The films were prepared by using cylinder magnetron gas flow sputterihg (CM-GPS) source in which pure titanium pipe target was used. In order to determine the structure of prepared film an optical energy gap measurement and X-ray diffraction were carried out, indicating that the structure of prepared film was TiO2 (anatase type). The increased wettability of TiO2 film under the irradiation of the ultraviolet ray is explained from the idea based on the Howkes theory, and adhesion force was evaluated with an atomic force microscope. As a result, it has been understood that the change in the thickness of the surface adsorption layer influences as a mechanism of the optical generation hydrophile of TiO2.
A novel chemical code system was constructed with gas-phase biosensors (bio-sniffer) and a commercial inkjet printer. Two volatile chemicals, hydrogen peroxide (H2O2) and ethanol, were used for chemical code and printed by the inkjet printer. Each chemicals could be recognized by bio-sniffer fabricated with catalase and alcohol oxidase (AOD), respectively. Each bio-sniffer shoswed high selectivity due to the substrate specificity of the enzyme. Thus the combination of the sniffers was able to discriminate the inkjet printed 2-bit chemical code (4 patterns).
The application of high hydrogen pressure for synthesis of new hydrides, both crystallines and amorphous is briefly described. Properties of novel hydrides, recently obtained for several Laves phases are discussed. Behavior of various hydrides during hydrostatic compression is presented including pressure induced phase transitions and segregation. Parameters of their EOS (Equation of State) are also given and discussed for some hydrides.
We used a stabilometer to examine development of postural control in 174 school-age boys aged 6-14. Subjects stood upright on a stabilometer for 30 s under both eyes-open and eyes-closed conditions. At that time, we determined the mean location of the center of pressure (CP), the migration area of CP, the migration distance of CP, and the mean migration velocity of CP (VCP) using the measuring instrument. Along with age, the sway in all measuring items decreased under both eyes-open and eyes-closed conditions so that it shows that posture control developed as age advanced. Each measuring item was evaluated according to the ability of discretion by Mahalanobis distance under both eyes-open and eyes-closed conditions. The greatest discretion through all grades was shown for VCP. Nevertheless, VCP decreases more with eyes open than with eyes closed, the difference grows larger between the ages of 9 and 11, indicating that the degree of dependence on visual information in postural control increases during that period. Differences between eyes-open and eyes-closed decrease after age 11; they become constant after age 12, indicating that the ability to maintain a stable posture is obtainable without much use of visual information.
Sticky digestive liquid from a carnivorous plant Drosera adelae contains a novel S-like ribonuclease (RNase). In normal plants, S-like RNases corresponding to the D. adelae RNase, which we named DA-I, are induced by phosphate starvation and/or wounding. In this study, the genomic organization of the DA-I gene (da-I) and its 5'-and 3'-flanking sequences were analyzed. The da-I was found to be a gene of single copy in D. adelae. The gene comprises four exons and three introns, with a similarity to the structure of the Class C S-like RNase genes. A nucleotide sequence analysis of the 5'-flanking region revealed that a canonical TATA box sequence (TATAAAT) lies between positions -33 to -27 and a CCAAT box is located between positions -84 to -80 relative to the transcription start site (+1). Although the gene is constitutively transcribed in glandular cells, three wound responsive and two phosphate starvation responsive DNA elements were found within the region between -160 to +2, presenting a riddle regarding the mechanism for the transcriptional regulation of the da-I.
The recent status of research, application, production and the characteristics of InSb and InAs thin film Hall elements are reviewed. Hall elements are now major application area for thin film technology such as vacuum deposition and MBE. Highly sensitive InSb thin filmHall elements formed by vacuum deposition are often applied as magnetic sensors for DC brushless motors used in electronic equipment such as Videotape recorders(VTRs) and personal computers(PCs). InAs thin film and InAs deep quantum well(DQW) Hall elements with high sensitivity and stability over a wide temperature range have been developed by molecular beam epitaxy (MBE). The temperature dependence of InSb single crystal thin films grown on GaAs substrate by MBE were reduced dramatically to very small value by Sn doping as donor impurity. The Hall elements fabricated from the Sn doped InSb single crystal thin films show the very small temperature dependence. They have potential for the present and future applications as magnetic sensors required by many electronic systems.
The carburizing process has been used as surface hardening technology for many years. Carburizing process has been widely used mainly in the machine industry, and has resulted by the end of today. Recently, the vacuum carburizing process has attracted attention not only as the conventional gas carburizing process but as a new carburizing method. The vacuum carburizing process serves as environment-friendly equipment gentle also to people as compared with the gas carburizing process. And the validity can be found out now also about the difficult heat treatment technology by the conventional method. This time, it introduces about the present condition and special carburizing technology of the vacuum carburizing furnace developed in our company.
We had already reported poly(2-methoxyetylacrylate) (PMEA) shows good blood compatibility. To clarify this reason we focused on water structure in it and found that PMEA has unique cold-crystallizable water (defined as freezing bound water). The relationship between freezing bound water and blood compatibility was investigated in detail by using MEA copolymer and several poly(methacrylate)s, and it was concluded that this water would play an important roll in PMEA's exhibitting the compatibility.
A student's science dislike and losing interest in science pose a graet problem in Japan. It is thought that this problem originates in reduction of the contact by children's natural with urbanization of a living environment in recent Japanes. It is necessary to notify a student about scientific pleasure and interest making science like. I propose to introduce the demonstration experiment to usual physics lecture. We have developed many demonstration experimental aparatuses for physis lecture assist. The outline of two demonstlation experiments are discribed, they are the new type of monkey and hunter, and the ion detection in combustion car engine flame.
Condition Based Maintenance (CBM) for motor-operated valves, which sre used in nuclear power statiions and other plants, requires a real-time monitoring during operation. This highly reliable and rational planned maintenance system can safely reduce theperiodical inspection intervals while cutting down maintenance and labor costs, contributing to reduction of exposure. This developed technology evaluates the soundness correctly, Enabling direct detection of the status in the machine that cannot be checked by conventional Methods. Once the sensor is incorporated into apart of motor-operated valve during the periodical Inspection, status monitoring and degradation tendency management can be made, without need of interrupting the operation and touching the valve, simply by attaching the connectors. ?? Compatible with ASME OM (Guideline for Condition Maintenaanceby American by Society of Mechanical Engineers) ?? Compatible with CNRC GL95-5 (Recommendation of Nuclear Regulatory Commission on Motor-Operated Valve of Nucelear Power Stations)