Shao-Chin Tseng has completed his PhD from department of materials science and engineering, National Taiwan University. He is the assistant scientist of National Synchrotron Radiation Research Center. He studies on Nanotechnology, X-ray nanoprobe, Optoelectronic Materials, Semiconductor Process, Biomedical Sensing. He has published more than 25 papers in reputed journals.
The X-ray nanoprobe (XNP) provides versatile X-ray-based inspection technologies, including diffraction, absorption spectroscopy, imageology, and so on. Also it will improve the analysis scale of imhomogeneous materials, tiny and diluted samples to the nanoscale. Moreover, the high-transmitted XNP can be used to inspect the “Nano World” like atomic arrangements, chemical and electronic configurations, which are widely adopted in the physics, chemistry, materials science, semiconductor devices, nanotechnologies, energy and environmental science, and earth science. Beside to the opening to the researchers, it is also important to improve the inspection and research strength of the XNP in the nanomaterials field, in order to increase the academic influence of the XNP and the Taiwan Photon Source. The primary experimental technique of XNP includes X-ray fluorescence spectroscopy (for the analysis in the depth-of-field distribution of elements), extended X-ray absorption spectroscopy (for the analysis in the electronic configuration and the atomic or molecular bonding length), excitation X-ray fluorescence spectroscopy (for the analysis in the recombination and transport of carriers), in-phase scanning X-ray imageology (the Fourier phase transform calculation can improve the space resolution down to 3nm to 5nm, and detect the stress distribution inside the nanostructures). The design XNP and the experimental applications will be reported
Mr. Sajad Hamedishahraki obtained his M.Sc in Civil engineering From Azad University, Tehran, Iran in 2013. Hi is currently studying PhD in Civil engineering in Azad University, At the moment, by the cooperation of the MSC Co, He is working on projects about strength of steel structures by using low-yield or easy going steel that is in abbreviation is known as EGS 100 or Y.P 100, instead of commercial steel. the results of the analysis demonstrated that the use of this steel is more efficient and economical than the steel that is currently used in earthquake-resistant systems.
The determination of dynamic characteristics of structures is one of the important parameters of strengthening and health of a structure. After determination of these parameters, one could obtain a precise viewpoint of performance of the structure. There are numerous methods to realize this objective that are increasingly developing to contribute to determination of associated parameters. The dynamic characteristics of a structure include frequency, mode shape and damping. In the present study, the determination of dynamic characteristics of a structure is done. First, the model is modelled in the software and tested under accelerometer. Then, the output data is received and the obtained data is analyzed to determine the dynamic characteristics of a structure through wavelet transform. The obtained dynamic parameters of wavelet transform are compared with the parameters of finite element application. Wavelet transform is a new way to determine the dynamic characteristics of a structure. To select the proper wavelet, one should obtain the main frequencies of the structure with proper accuracy. After selection of proper wavelet, this method could be generalized to three-dimensional structures and other special structures such as bridges, tunnels and industrial chimneys. After determining the dynamic characteristics of these structures at the beginning of its construction and a while later, one could estimate the damages that structure undergoes