Coherent diffraction imaging is a form of microscopy that permits high resolution imaging of atomic displacements from equilibrium where the use of conventional optics is not feasible. Approaches to date for the recovery of atomic displacements from equilibrium and subsequently strain information occur after phase reconstruction of the complex real-space images from at least three independent Bragg diffraction amplitude measurements. While this is a more accessible and effective approach to recover strain information, there is potential for erroneous results if the recovered phase information is not carefully treated. Here we present a strategy for imaging strain with coherent x-rays that eliminates the technical challenges that exist in conventional approaches by constructing the strain field concurrently during the phase retrieval process of recovering phase information.

In utilizing nanodevice development research papers to assist in experimental planning and design, it is useful to identify and annotate characteristic categories of information contained in those papers such as source material, evaluation parameter, etc. In order to support this annotation process, we have been working to construct a nanodevice development corpus and a complementary automatic annotation scheme. Due to the variations of terms, however, recall of the automatic annotation in some information categories was not adequate. In this paper, we propose to use a basic physical quantities list to extract parameter information. We confirmed the efficiency of this method to improve the annotation of parameters. Recall for parameters increases between 4% and 7% depending on the type of parameter and analysis metric.

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Africa is the only habitable continent that is not yet host to a light source — an important tool across disciplines. Scientists from the Executive Committee of the African Light Source Foundation discuss work towards building an advanced light source in Africa, and what remains to be done.