Harbin Institute of Technology View Institution's Website 2 articles published in JoVE Engineering Determining the Mechanical Strength of Ultra-Fine-Grained Metals Jianing Xu*1,2, Yanju Wang*2, Jinyuan Yan3, Bin Chen1,2 1School of Science, Harbin Institute of Technology, 2Center for High Pressure Science and Technology Advanced Research, 3Advanced Light Source, Lawrence Berkeley National Lab The protocol presented here describes the high-pressure radial diamond-anvil-cell experiments and analyzing the related data, which are essential for obtaining the mechanical strength of the nanomaterials with a significant breakthrough to the traditional approach. Bioengineering Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography Wei Song*1,2, Qing Wei*1, Shuliang Jiao3, Hao F. Zhang1,4 1Department of Biomedical Engineering, Northwestern University, 2Department of Physics, Harbin Institute of Technology, 3Department of Ophthalmology, University of Southern California, 4Department of Ophthalmology, Northwestern University Photoacoustic ophthalmology (PAOM), an optical-absorption-based imaging modality, provides the complementary evaluation of the retina to the currently available ophthalmic imaging technologies. We report the using of PAOM integrated with spectral-domain optical coherence tomography (SD-OCT) for simultaneous multimodal retinal imaging in rats.