scholarly journals On the Role of Space in Origination of Inertia Force Field, Earth Gravity Force Field and Zero Gravity of Material Body

2018 ◽  
Vol 2018 (2) ◽  
pp. 190-206
Author(s):  
Y. M. Mulyar ◽  
V. M. Fedorov
Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5853
Author(s):  
Sulejman Skoko ◽  
Matteo Ambrosetti ◽  
Tommaso Giovannini ◽  
Chiara Cappelli

We present a detailed computational study of the UV/Vis spectra of four relevant flavonoids in aqueous solution, namely luteolin, kaempferol, quercetin, and myricetin. The absorption spectra are simulated by exploiting a fully polarizable quantum mechanical (QM)/molecular mechanics (MM) model, based on the fluctuating charge (FQ) force field. Such a model is coupled with configurational sampling obtained by performing classical molecular dynamics (MD) simulations. The calculated QM/FQ spectra are compared with the experiments. We show that an accurate reproduction of the UV/Vis spectra of the selected flavonoids can be obtained by appropriately taking into account the role of configurational sampling, polarization, and hydrogen bonding interactions.


Author(s):  
Qi Lu ◽  
Wenwu Xiu ◽  
Ou Ma

Statically-balanced technology is often used to compensate partial or full gravity force exerting on a mechanism in order to reduce the effort of driving the mechanism. Since such compensation is static, when a statically-balanced mechanism is used for dynamic applications, it will still have impedance (mechanical resistance to input motion) because the mechanism still subjects to the inertia forces although the gravity force has been compensated. Such a dynamic effect is undesirable for many applications, especially for those required to physically interact with humans and hence, the impedance property needs to be fully understood and possibly minimized in the design and/or operation of a statically-balanced mechanism. This paper studies the impedance property of passive statically-balanced mechanisms. Based on the study result, optimization strategies are proposed in order to optimize the operation of a statically-balanced mechanism. The strategies are then applied to a spring-based reduced-gravity simulation mechanism to figure out an optimal set of configurations in the workspace where the mechanism has the lowest impedance and the highest zero-gravity simulation fidelity.


2010 ◽  
Vol 53 (11) ◽  
pp. 1093-1122 ◽  
Author(s):  
Anatolii I Nikishov ◽  
Vladimir I Ritus

1983 ◽  
Vol 19 (4) ◽  
pp. 359-366
Author(s):  
V. N. Basharova ◽  
V. N. Buivol ◽  
V. V. Serebryakov

2010 ◽  
Vol 180 (11) ◽  
pp. 1135 ◽  
Author(s):  
Anatolii I. Nikishov ◽  
Vladimir I. Ritus

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