The use of optical tweezers to measure micrometer-resolution velocity fields in fluid flow is demonstrated as an extension of a scanning confocal viscosity microscope. This demonstration is achieved by detection of the motion of an optically trapped microsphere in an oscillating laser trap. The technique is validated by comparison with an independent video-based measurement and applied to obtai...

Background: Mindfulness based interventions may be useful for patients with musculoskeletal conditions in orthopedic surgical practices as adjuncts to medical procedures or alternatives to pain medications. However, typical mindfulness programs are lengthy and impractical in busy surgical practices. We tested the feasibility, acceptability and preliminary effect of a brief, 60-second mindfulnes...

We perform an experimental study of granular impact, where intruders strike 2D beds of photoelastic disks from above. High-speed video captures the intruder dynamics and the local granular force response, allowing investigation of grain-scale mechanisms in this process. We observe rich acoustic behavior at the leading edge of the intruder, strongly fluctuating in space and time, and we show tha...

This paper compares tandem scanning reflected light confocal microscopy and multi-photon excitation microscopy for the observation of human skin in vivo. Tandem scanning confocal light microscopy based on a white light source can provide video-rate image acquisition from the skin surface to the epidermal-dermal junction. Multi-photon excitation is induced by a 80 MHz pulse train of femtosecond ...

Endolaryngeal microscopic laryngosurgery (microlaryngosurgery) using a direct laryngoscope is the preferred surgical method for treating laryngeal lesions under general anesthesia. However, this method does not provide a wide-angle view of the larynx and does not allow detailed observations of the ventricle and subglottis of the laryngeal cavity, resulting in blind areas. Video-assisted endosco...

Brief Description of Research Project A Traffic Scanner (TScan) is being developed with the joint pool of NEXTRANS’s and INDOT/JTRP’s funds to enable collecting accurate microscopic traffic data at road intersections with an innovative use of Light Detection and Ranging (LiDAR) 3D laser scanning technology. LiDAR sensing promises to overcome certain limitations of video cameras because it yield...

Detection of very low light levels arising from individual cells of the naturally bioluminescent bacterium Vibrio fischeri as well as from a luminescence-marked Pseudomonas putida strain was achieved by the aid of two different camera systems. Using a liquid nitrogen-cooled slow-scan CCD (charge-coupled device) camera were able to detect single-cell bioluminescence within 1 min, and the picture...

Research into developing more reliable microscopic traffic simulation models is seriously hampered by the availability of suitable microscopic data for calibration and validation purposes. This paper presents a review of several data collection technologies that the authors have been experimenting with. The methods include (i) video recording (ii) the use of differential GPS (DGPS) and (iii) an...