Breathing Effect via Solvent Inclusions on the Linker Rotational Dynamics of Functionalized MIL‐53

This chapter discusses the importance of circular motion and rotations, whose applications to chemical systems are plentiful. Circular motion is the book’s first example of a special case of motion using the laws developed in previous chapters. The chapter begins with the basic definitions of circular motion; as uniform rotation around a principle axis is much easier to consider, it is the focus of this chapter and is used to develop some key ideas. The chapter discusses angular displacement, angular velocity, angular momentum, torque, rigid bodies, orbital and spin momenta, inertia tensors and non-inertial frames and explores fictitious forces as well as transformations in rotating frames.

Download Full-text

Rotational dynamics of O2 in the electronic ground XΣg−3 state induced by an intense femtosecond laser field

Physical Review A ◽

10.1103/physreva.103.033118 ◽

2021 ◽

Vol 103 (3) ◽

Author(s):

Kotaro Sonoda ◽

Shinichi Fukahori ◽

Hirokazu Hasegawa

Keyword(s):

Femtosecond Laser ◽

Laser Field ◽

Rotational Dynamics ◽

Electronic Ground

Download Full-text

Modeling and Analysis of a Generic Internal Cargo Airdrop System for a Tandem Helicopter

Applied Sciences ◽

10.3390/app11115109 ◽

2021 ◽

Vol 11 (11) ◽

pp. 5109

Author(s):

Guozhi Li ◽

Yihua Cao ◽

Maosheng Wang

Keyword(s):

Nonlinear Dynamics ◽

Flight Dynamics ◽

Simulation Method ◽

Rotational Dynamics ◽

Discretization Method ◽

Modeling And Analysis ◽

Flight Velocity ◽

Vector Mechanics ◽

Good Attitude

This article describes the results of modeling and analysis of a generic internal cargo system using a discretization method of the vector mechanics. The model can be easily incorporated into a tandem helicopter model and is intended for use of simulation and investigating the problems of flight dynamics, control, etc., both in flight operation loading a cargo and flight operation in the process of airdrops. The model is derived by considering the main descriptions of the cargo, including the linear and rotational dynamics, the kinematics, and the forces and moments acting on the helicopter. A simulation method embedded with a numerical trim algorithm is developed for the complete coupling helicopter/cargo nonlinear dynamics system. The simulation application of the model is illustrated, including the case of flight operation loading a cargo by considering three mass configurations of 3000, 4500, and 6000 kg, and the case of flight operation in the process of airdrops at velocities of 0, 40, 80, 120, and 160 knots. Stabilities of the helicopter in the process of airdrops are also analyzed. The major conclusions drawn are: (i) the tandem helicopter has a good attitude maintaining ability in the whole flight velocity envelope when it conducts a flight operation loading a cargo; (ii) in the process of airdrops, the increase in flight velocity will constantly decrease the helicopter pitching attitude and increases the total airdrop time and decreases the backward moving velocity of the cargo, and helicopter flying at a velocity between 80 and 120 knots might be acceptable; (iii) the stabilities of both the longitudinal and lateral periodic modes are continuing to decrease during the backward movement of the cargo.

Download Full-text

Contrasting Effects of FA Substitution on MA/FA Rotational Dynamics in FAxMA1–xPbI3

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.1c03280 ◽

2021 ◽

Author(s):

V. K. Sharma ◽

R. Mukhopadhyay ◽

A. Mohanty ◽

V. García Sakai ◽

M. Tyagi ◽

...

Keyword(s):

Rotational Dynamics

Download Full-text

Rotational dynamics of lipid and the Ca-ATPase in sarcoplasmic reticulum. The molecular basis of activation by diethyl ether.

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)76447-3 ◽

1987 ◽

Vol 262 (28) ◽

pp. 13449-13456

Author(s):

D J Bigelow ◽

D D Thomas

Keyword(s):

Sarcoplasmic Reticulum ◽

Diethyl Ether ◽

Molecular Basis ◽

Rotational Dynamics

Download Full-text

Insights into the translational and rotational dynamics of cations and anions in protic ionic liquids by means of NMR fast-field-cycling relaxometry

Physical Chemistry Chemical Physics ◽

10.1039/d0cp05440b ◽

2021 ◽

Vol 23 (4) ◽

pp. 2663-2675

Author(s):

Viviane Overbeck ◽

Henning Schröder ◽

Anne-Marie Bonsa ◽

Klaus Neymeyr ◽

Ralf Ludwig

Keyword(s):

Ionic Liquids ◽

Rotational Dynamics ◽

Protic Ionic Liquids ◽

Field Cycling ◽

Fast Field ◽

Hydrogen Bonded

NMR Fast-Field-Cycling (FFC) relaxometry provides important information about translational and rotational dynamics of hydrogen bonded protic ionic liquids (PILs).

Download Full-text