College of Engineering (COE)
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Note: The Department of Biological Systems Engineering is listed within the College of Agriculture and Life Sciences (CALS).
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Browsing College of Engineering (COE) by Subject "0204 Condensed Matter Physics"
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- Internal optical loss and light-current characteristic in injection lasersSokolova, Zinaida N.; Pikhtin, Nikita A.; Slipchenko, Sergey O.; Asryan, Levon V. (IOP, 2021-12-06)Possibility of tailoring the light-current characteristic (LCC) shape in quantum dot (QD) lasers by varying uniformity of QDs is discussed. Making the QD ensemble less uniform results in roll-over in the LCC. The second branch in the LCC appears with making the QD ensemble even less uniform.
- Stiff and strong, lightweight bi-material sandwich plate-lattices with enhanced energy absorptionHsieh, Meng-Ting; Ha, Chan Soo; Xu, Zhenpeng; Kim, Seokpum; Wu, H. Felix; Kunc, Vlastimil; Zheng, Xiaoyu (Springer, 2021-08-17)Plate-based lattices are predicted to reach theoretical Hashin–Shtrikman and Suquet upper bounds on stiffness and strength. However, simultaneously attaining high energy absorption in these plate-lattices still remains elusive, which is critical for many structural applications such as shock wave absorber and protective devices. In this work, we present bi-material isotropic cubic + octet sandwich plate-lattices composed of carbon fiber-reinforced polymer (stiff) skins and elastomeric (soft) core. This bi-material configuration enhances their energy absorption capability while retaining stretching-dominated behavior. We investigate their mechanical properties through an analytical model and finite element simulations. Our results show that they achieve enhanced energy absorption approximately 2–2.8 times higher than their homogeneous counterparts while marginally compromising their stiffness and strength. When compared to previously reported materials, these materials achieve superior strength-energy absorption characteristics, making them an excellent candidate for stiff and strong, lightweight energy absorbing applications. Graphic Abstract: [Figure not available: see fulltext.]
- The viability of SARS-CoV-2 on solid surfacesHosseini, Mohsen; Behzadinasab, Saeed; Benmamoun, Zachary; Ducker, William A. (Elsevier, 2021-10-01)The COVID-19 pandemic had a major impact on life in 2020 and 2021. One method of transmission occurs when the causative virus, SARS-CoV-2, contaminates solids. Understanding and controlling the interaction with solids is thus potentially important for limiting the spread of the disease. We review work that describes the prevalence of the virus on common objects, the longevity of the virus on solids, and surface coatings that are designed to inactivate the virus. Engineered coatings have already succeeded in producing a large reduction in viral infectivity from surfaces. We also review work describing inactivation on facemasks and clothing and discuss probable mechanisms of inactivation of the virus at surfaces.