There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

American Society for Testing and Materials

Elements Of X Ray Diffraction

ASSOCIATE EDITORS Frank A. Anania, Atlanta, GA Jorge A. Bezerra, Cincinnati, OH Raymond T. Chung, Boston, MA Eithan Galun, Jerusalem, Israel Guadalupe Garcia-Tsao, New Haven, CT Stephen A. Harrison, Fort Sam Houston, TX Brett Lindenbach, New Haven, CT Jacquelyn Maher, San Francisco, CA Wajahat Mehal, New Haven, CT Lola M. Reid, Chapel Hill, NC Mario Strazzabosco, New Haven, CT Norah Terrault, San Francisco, CA Snorri S. Thorgeirsson, Bethesda, MD Michael Trauner, Vienna, Austria

Review of recent research on hepatitis C therapy for 54th annual meeting of the American association for the study of liver diseases

The text consists of two sections, one for those studying or practicing diagnostic radiology, nuclear medicine and radiation oncology; the other for those engaged in the study or clinical practice of radiation oncology--a new chapter, on radiologic terrorism, is specifically for those in the radiation sciences who would manage exposed individuals in the event of a terrorist event. The 17 chapters in Section I represent a general introduction to radiation biology and a complete, self-contained course especially for residents in diagnostic radiology and nuclear medicine that follows the Syllabus in Radiation Biology of the RSNA. The 11 chapters in Section II address more in-depth topics in radiation oncology, such as cancer biology, retreatment after radiotherapy, chemotherapeutic agents and hyperthermia.

Radiobiology for the Radiologist

Properties and deformation behaviour of Mg–Y2O3 nanocomposites

Wear behaviour of SiCp-reinforced magnesium matrix composites

Magnesium-Based Nanocomposites: Lightweight Materials of the Future

Carbon nanotube (CNT) reinforced magnesium was synthesized using the powder metallurgy technique followed by hot extrusion. Up to 0.3 wt% of CNTs were added as reinforcements. The effects of the carbon nanotubes on the physical and mechanical properties of Mg were investigated. The thermo-mechanical property results show an increase in thermal stability with increasing amount of CNTs in the Mg nanocomposites. Mechanical property characterizations reveal an improvement of yield strength, ductility and work of fracture with higher weight percentages of CNTs incorporated. An attempt is made to correlate the physical and mechanical properties with the increasing weight fractions of carbon nanotubes in the pure Mg matrix.

https://iopscience.iop.org/article/10.1088/0957-4484/17/1/002/pdf

Development of novel carbon nanotube reinforced magnesium nanocomposites using the powder metallurgy technique

In the present study, magnesium based composites with three different volume percentages of nano-sized Al2O3 particulates reinforcement were fabricated using blend-press-sinter methodology avoiding ball milling. Microstructural characterization of the materials revealed reasonably uniform distribution of nano-size Al2O3 reinforcement and presence of minimal porosity. Mechanical properties characterization revealed that the presence of nano-Al2O3 particulates as reinforcement lead to a simultaneous increase in hardness, elastic modulus, 0.2% yield strength, UTS and ductility of pure magnesium. The results revealed that the 0.2% yield strength, UTS and ductility combination of the magnesium nano-composites containing 0.66 and 1.11 vol% of alumina remained higher when compared to high strength magnesium alloy AZ91 reinforced with much higher amount of micrometer size SiC particulates. An attempt is made in the present study to correlate the effect of presence of nano-Al2O3 as reinforcement and its increasing amount with the microstructural and mechanical properties of magnesium.

Development of high performance magnesium nano-composites using nano-Al2O3 as reinforcement

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