Diffraction experiment

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  • This book grew out of a semester-long course on the principles and applications of ultrasonics for advanced undergraduate, graduate, and external students at Concordia University over the last 10 years. Some of the material has also come from a 4-hour short course, “Fundamentals of Ultrasonic Waves,” that the author has given at the annual IEEE International Ultrasonics Symposium for the last 3 years for newcomers to the field.

    pdf438p echbuon 02-11-2012 46 8   Download

  • We have attempted to improve and update this text while retaining the features that make it unique, namely, an emphasis on physical understanding, and the ability to estimate, evaluate, and predict results without blind reliance on computers, while still maintaining rigorous connection to the mathematical basis for quantum chemistry. We have inserted intomost chapters examples that allowimportant points to be emphasized, clarified, or extended. This has enabled us to keep intact most of the conceptual development familiar to past users.

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  • Đề tài nêu được vai trò của thí nghiệm trong dạy học Vật lý, thiết kế, chế tạo bộ thí nghiệm giao thoa và nhiễu xạ sóng nước, soạn thảo được các tiến trình dạy học các kiến thức bài “Giao thoa sóng” – Vật lí 12. Từ khóa: thí nghiệm Vật lí, thiết bị thí nghiệm, giao thoa, nhiễu xạ, tiến trình dạy học. ABSTRACT Topics mentioned the role of experiments in physics teaching.

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  • This paper will show the results of the first experiments to get nano-clay clay composite materials based on modified polystyrene resin by melt - mix method. The intercalated nanocomposite structures are characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. Polystyrene nano-composites with 2% nanoclay by weight exhibit an increases about 10% in impact resistance and they also lower the water absortion (nearly 60% compared with polystyrene resin) without any significant loss of tensile strength, flexural strength and flexural modulus.

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  • Tungsten oxide film was deposited on ITO-coated glass by using RF magnetron sputtering method from WO3 ceramic target. Thin film preparation – process took place in Ar + O2 plasma. The dependence of tungsten oxide film structure on experiment conditions was investigated by X-ray diffraction (XRD) Raman spectroscopy. In this paper, we considered that the thickness of ITO layers about 150nm to 350nm clearly effects on the Raman and XRD spectrograms of WO3 films.

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