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
Keyword(s):  
Force Field ◽  
Gravity Force ◽  
Inertia Force ◽  
Zero Gravity ◽  
Material Body ◽  
Earth Gravity

scholarly journals Simulating Absorption Spectra of Flavonoids in Aqueous Solution: A Polarizable QM/MM Study

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 5853
Author(s):  
Sulejman Skoko ◽  
Matteo Ambrosetti ◽  
Tommaso Giovannini ◽  
Chiara Cappelli
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solution ◽  
Hydrogen Bonding ◽  
Force Field ◽  
Absorption Spectra ◽  
Computational Study ◽  
Md Simulations ◽  
Quantum Mechanical ◽  
Hydrogen Bonding Interactions

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.

On the Impedance of Statically-Balanced Mechanisms

2011 ◽  
Author(s):  
Qi Lu ◽  
Wenwu Xiu ◽  
Ou Ma
Keyword(s):  
Dynamic Effect ◽  
Gravity Force ◽  
Mechanical Resistance ◽  
Zero Gravity ◽  
Reduced Gravity ◽  
Simulation Fidelity ◽  
Input Motion ◽  
Optimal Set ◽  
Inertia Forces ◽  
Impedance Property

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.

Gravitational radiation of systems and the role of their force field

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

Slender axisymmetric cavities in the flow around bodies in a longitudinal gravity force field

1983 ◽  
Vol 19 (4) ◽  
pp. 359-366
Author(s):  
V. N. Basharova ◽  
V. N. Buivol ◽  
V. V. Serebryakov
Keyword(s):  
Force Field ◽  
Gravity Force ◽  
Axisymmetric Cavities

Gravitational radiation of systems and the role of their force field

2010 ◽  
Vol 180 (11) ◽  
pp. 1135 ◽  
Author(s):  
Anatolii I. Nikishov ◽  
Vladimir I. Ritus
Keyword(s):  
Force Field ◽  
Gravitational Radiation
Sign in / Sign up

Export Citation Format

Share Document