The authors describe a recently developed system for use in vitreoretinal surgery. The system is compatible with a variety of lens choices, including wide-field, equatorial, and high-magnification direct viewing lenses, allowing for visualization of the far peripheral retina and detailed imaging of the macula. Used with autoclavable lenses, the system achieves high-resolution image quality at a cost-effective price.
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http://dx.doi.org/10.3928/15428877-20091030-16 | DOI Listing |
Micromachines (Basel)
December 2024
Department of Mechanical Engineering, Brigham Young University, 350 Engineering Building, Provo, UT 84602, USA.
Recent advancements in Electrowetting on Dielectric (EWOD) systems, such as simplified fabrication, low-voltage actuation, and the development of more reliable materials, are expanding the potential applications of electrowetting actuators. One application of EWOD actuators is in RF devices to enable dynamic reconfiguration and allow real-time adjustments to frequency and bandwidth. In this paper, a method is introduced to actuate a panel using EWOD forces.
View Article and Find Full Text PDFMar Pollut Bull
December 2024
Extreme Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Korea Institute of Science and Technology - Sungkyunkwan University Carbon-Neutral Research Center, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea. Electronic address:
Oil spill accidents have series environmental and economic impacts, increasing the demand for efficient technologies to recover oil from contaminated waters. In this study, a hierarchically structured ratchet surface with superhydrophilicity was presented as a novel oil skimming mechanism for the recovery of high-viscosity oil, particularly low-sulfur fuel oil (LSFO), which has recently been used as marine fuel in open water environments. The interaction between the superhydrophilic ratchet and oil provides favorable conditions for oil retention at the water surface.
View Article and Find Full Text PDFJ Colloid Interface Sci
December 2024
Department of Mechanical Engineering, Baylor University, One Bear Place #97356, Waco, 76798, TX, United States. Electronic address:
This study reveals how drops impacting thin liquid films leave behind radial microbubble trains - here defined as large-area microbubbles (LAMs) - over a region comparable to the maximal surface coverage of the spreading phase. Using a thin, minimally compliant viscous oil film, the trapped bubbles are immobilized and quantified via high-speed imaging techniques across varying drop velocities and surface inclinations. The setup enables the characterization of microbubble entrainment (e.
View Article and Find Full Text PDFSci Rep
November 2024
College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, 266071, China.
This study presents an innovative scraper pump design. The design utilizes the synchronized movement of the upper and lower scrapers of the rotor to adjust the cavity volumes on either side, facilitating efficient fluid transfer. Unlike previous studies, scraper pumps face the challenge of dynamic contact between the scraper and the rotor due to their unique structure.
View Article and Find Full Text PDFPhys Rev Lett
November 2024
Institut für Theoretische Physik II: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
Friction is central to the motion of active (self-propelled) objects such as bacteria, animals, and robots. While in a viscous fluid friction is described by Stokes's law, objects in contact with other solid bodies are often governed by more complex empirical friction laws. Here, we study active particles subject to Coulomb friction using a combination of active granular experiments and simulations, supported by theoretical predictions.
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