A novel sample delivery system based on circular motion for in situ serial synchrotron crystallography
Feng‐Zhu ZhaoBo SunYu LiQingjie XiaoZhijun WangLiang‐Liang ChenHuan LiangQisheng WangJianhua HeDa‐Chuan Yin
15
Citation
51
Reference
10
Related Paper
Citation Trend
Abstract:
A microfluidic rotating-target sample delivery device based on circular motion for Keywords:
Circular motion
A symmetric top or gyroscope can start its motion with different initial values. One can not decide the motion type only by looking at these initial values. For example, in a motion, precession angular velocity can be negative at the beginning, but the top's overall precession can be positive; or initially, the gyroscope spins in one direction, but in a later stage one can find it while spinning in the other direction. On the other hand, if one knows different properties and types of motion, one can know what will happen. In this work, we have studied the classification of motion type by using constants of motion. We have also studied changes in dynamic variables. We have given examples of different types of motion and solved them numerically.
Precession
Circular motion
Dynamics
Linear motion
Cite
Citations (0)
The central feature of Aristotle’s mechanics is his discussion of local motion, a change of place, which he categorizes as either natural or violent. He further divides natural motion into celestial motion, which is uniform, circular and eternal, and terrestrial motion, which is rectilinear (straight up or down), and finite in both time and distance. All motions which are not natural are classified as violent. For all motion Aristotle required a force in direct contact with the object being moved. We may represent the Aristotelian law of motion by the modern formula: Velocity = Force (motive power)/Resistance, or V=kF/R. In applying this law of motion to falling bodies, Aristotle associated the weight of the body with the force, and the resistance of the air (or other medium) with the resistance. Thus, Aristotle believed that heavy bodies fall faster than light ones. The problem of what force is actually in contact with the body, and causes it to fall, posed a serious difficulty for Aristotle. Aristotle concluded that elements were created with a tendency to move to their natural place, barring any hindrance or interference. Projectile motion posed a similar problem for Aristotle. In the case of a thrown object, the force was provided by the hand of the thrower as long as the object was in contact with the hand. But one needed an explanation of why the object continued to move once it had left the thrower’s hand. Aristotle concluded that the medium through which the projectile moved provided the force that kept it moving. Aristotle also regarded both the existence of a void or any motion in it as impossible. A void contains nothing that could sustain the motion of a projectile once it left the projector. In addition, because a void can provide no resistance, the speed of an object in a void would be infinite.
Projectile motion
Circular motion
Natural Law
Cite
Citations (0)
Digital Microfluidics
Lab-on-a-Chip
Microfluidic chip
Cite
Citations (37)
Building on a previous Apparatus article, some additions to a circular motion lab allow quick, accurate determination of the mathematical model F=mv2/R. Using a force probe and motion detector interfaced to a computer, data is quick and easy to acquire
Circular motion
Cite
Citations (2)
An abstract is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.
Circular motion
Cite
Citations (0)
In this paper, we present a novel dynamical approach to teach circular motion. According to the principle of inertia, objects without external influences move in a uniform and straight way. With a kick, one can turn the motion towards one side. By successively continuing these turns, a complete circle can be reached. With the help of standard kicks that all have the same strength and well defined directions, students construct circular movements with varying radii, velocities and masses. By counting the vivid standard kicks, all influencing factors of the radial force are quantified. We give examples that were tested and evaluated in high school physics classes.
Circular motion
Cite
Citations (0)
In this paper we describe the benefit of using indirect microfluidic systems compared to classical highly integrated microfluidics or monolithic microfluidic systems in polydimethylsiloxane (PDMS). Indirect microfluidic systems allow the user to split a microfluidic system into an active system part containing valves and pumps and a passive system part containing disposable parts such as microfluidic polymer chips. The systems can be used for applications such as biomedical applications where the use of disposable components is a necessity. We furthermore discuss the use of a new type of polymers that can be used in combination with indirect microfluidic systems: photocurable perfluoropolyethers which can be described as photocurable liquid Teflon. We demonstrate first experimental result in producing parts from this new type of polymers and their application in indirect microfluidic systems.
Polydimethylsiloxane
Microfluidic chip
Cite
Citations (0)
A symmetric top or gyroscope can start its motion with different initial values. One can not decide the motion type only by looking at these initial values. For example, in a motion, precession angular velocity can be negative at the beginning, but the top's overall precession can be positive; or initially, the gyroscope spins in one direction, but in a later stage one can find it while spinning in the other direction. On the other hand, if one knows different properties and types of motion, one can know what will happen. In this work, we have studied the classification of motion type by using constants of motion. We have also studied changes in dynamic variables. We have given examples of different types of motion and solved them numerically.
Precession
Circular motion
Dynamics
Linear motion
Constant of motion
Cite
Citations (1)
Coulomb friction
Circular motion
Cite
Citations (6)
We use web based simulation (freely available for use by everyone) to teach certain aspects of circular motion. In this article, we present the contents of a computer simulation exercise illustrating concepts of circular motion that a set of 47 students took. We discuss how the simulation and a lecture thereafter aided in student understanding of circular motion concepts. We have used carefully thought out instructions for the computer simulation in which the students play with various parameters in the simulation, attend a lecture on circular motion and solve a conceptual problem thereafter. We show that by using such simulation based activity in conjunction with lecture, student understanding of physical concepts can be greatly enhanced.
Motion simulation
Circular motion
Cite
Citations (17)