In this paper, we propose a new acoustic computerized tomography (A-CT) method using reflection. This method is alternate optimization for measuring the temperature distribution in a cylindrical space. The A-CT method using reflection includes two inverse problems, namely, the back projection of Radon transform and the division of times of flight (TOFs) of reflected sounds into TOFs of pre-reflection and post-reflection. The TOF estimation problem requires the temperature distribution. To solve this problem mathematically, alternate optimization is applied to the A-CT method using reflection. Simulation results indicate that our new A-CT method using reflection is useful for measuring the temperature distribution in a cylindrical space.

We propose a new acoustic computerized tomography (A-CT) for measuring temperature distribution in a rectangular space. This space is surrounded by acoustic transducers in rectangular arrangement. The rectangular arrangement causes two problems. One is that the number of parallel sound paths is quite different depending on the direction of pseudo rotational scanning. The other is that angular intervals of the pseudo rotational scanning are unequal. This indicates that projection data sets cannot be obtained at equal angular intervals. To counter these difficulties, projection data sets of equal angular intervals and equal linear intervals in the radial direction are created by two-dimensionally interpolating the acquired projection data points smoothly in r -space with biharmonic spline interpolation (BSP). From simulation results, the validity of the proposed method is confirmed, and this indicates that the new A-CT is useful for measuring temperature distribution in a rectangular space. #

Ternary alloy CdSSe nanowires and nanoribbons were successfully grown through a one-step thermal evaporation route using Au as a catalyst. The nanostructures obtained are uniform in diameter, and have smooth surfaces. High-resolution transmission electron microscopy, energy dispersive x-ray spectra and x-ray diffraction showed that both the nanowires and the nanoribbons have high-quality single-crystalline nature, and their compositions can be determined as CdS 0.6 Se 0.4 and CdS 0.3 Se 0.7 , respectively. The mechanisms of formation of these two different nanostructures were discussed. The photoluminescence measurements showed very strong band-edge emission for both samples, which further demonstrates the single-crystal nature of the as-obtained CdSSe alloys. This finding may be extended for fabricating other composition-tunable 1D ternary alloy nanostructures.

CDIO is a framework of engineering education curricula for developing next-generation engineers. The guideline for CDIO was produced by CDIO Initiative in 2004. The CDIO concept is based on the design process in actual systems and product development, and the educational program following this concept is becoming a global standard in engineering education. By taking this educational program, learners can acquire the abilities to "conceive," "design," "implement," and "operate" as defined by CDIO Initiative. Kanazawa Institute of Technology (hereinafter called "our college") joined CDIO Initiative, and is promoting advanced engineering education in Japan. Our college adopted the project-based learning (PBL) method in the creative subjects "Design Project I" and "Design Project II," to conduct engineering design education for improving students skills to detect and solve problems. In this situation, this paper evaluates students' projects in Design Project with the CDIO concept, and mentions measures for improving the quality of students' projects from the viewpoint of the CDIO concept.