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Hysteretic models are widely used to model frictional interactions in joints to recreate experimental behavior. However, it is unclear which models are best suited for fitting or predicting the responses of structures. The present study evaluates 26 friction model/interface representation combinations to quantify the model form error. A Quasi-Static Modal Analysis approach (termed Rayleigh Quotient Nonlinear Modal Analysis) is adopted to calculate the nonlinear system response, and a Multi-Objective Optimization is solved to fit experimental data of the first mode of the Brake-Reuß Beam. Optimized parameters from the first mode are applied to the second and third bending modes tomore »Free, publicly-accessible full text available January 1, 2023
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In this work, a proteolytic digest of cytochrome c (microperoxidase 11, MP-11) was used as a model to study the structural aspects of heme protein interactions and porphyrin networks. The MP-11 structural heterogeneity was studied as a function of the starting pH ( e.g. , pH 3.1–6.1) and concentration ( e.g. , 1–50 μM) conditions and adduct coordination. Trapped ion mobility spectrometry coupled to mass spectrometry (TIMS-MS) showed the MP-11 structural dependence of the charge state distribution and molecular ion forms with the starting pH conditions. The singly charged ( e.g. , [M] + , [M − 2H + NHmore »
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Since the release of the Oculus Rift CV1 in 2016, millionsof VR headsets have found their way into consumer homes.In this paper, we sought to understand what shifts have takenplace within the two years since consumer VR became avail-able. In this paper, we consider what can be learned aboutlong-term use of consumer VR through an analysis of dis-cussions in online forums devoted to VR. We gathered postsmade on the /r/Vive subreddit from the first two years after theHTC Vive’s release. We present the results from an in-depthqualitative analysis concerning immersion, presence, and sim-ulator sickness. Over time, as users moved frommore »
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Free, publicly-accessible full text available November 1, 2022
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null (Ed.)Free, publicly-accessible full text available July 1, 2022