###### Acceleration

- I am looking for a software/hardware environment for digitizing either film or (prefereably) videotape and automatically analyzing for trajectories, velocity, acceleration (linear and radial), etc of multiple objects in the field of view. (bio.net)
- So basically I need to find vertical acceleration, intitial velocity, and angle theta. (physicsforums.com)
- We are now in a position to compute the velocity and acceleration functions. (sparknotes.com)
- Notice that the magnitude of the creature's velocity (i.e. the speed at which the creature is traveling) is high at t = - 2 , decreases considerably at t = 0 , and goes back up again at t = 2 , even though the acceleration is constant! (sparknotes.com)
- This is because the acceleration is causing the creature to slow down and change direction --in the same way that a ball thrown upwards (which experiences constant acceleration due to the earth's gravity) slows down to zero-velocity as it reaches its maximum height, and then changes direction to fall back down. (sparknotes.com)
- One of the most severe types of closed head injuries, diffuse axonal injury (DAI), occurs as a result of high velocity acceleration/ deceleration of the head with a rotational component that may cause widespread neuroanatomical and neurophysiological damage. (nocsae.org)
- Compared to vertically vibrating devices the side alternating motion results in very low acceleration acting on the centre of gravity of the upper body and the head. (wikipedia.org)
- The sinusoidal motion, cosinusoidal velocity, and sinusoidal acceleration (assuming constant angular velocity) result in smoother operation. (wikipedia.org)
- If there is a change in speed, direction or both, then the object has a changing velocity and is said to be undergoing an acceleration. (wikipedia.org)

###### flow velocity in the left

- Simultaneous assessment of wall motion and coronary flow velocity in the left anterior descending coronary artery during dipyridamole stress echocardiography. (biomedsearch.com)
- In obstructive hypertrophic cardiomyopathy (HCM), if SAM were caused by the Venturi mechanism, high flow velocity in the left ventricular outflow tract (LVOT) should be found at the time of SAM onset. (onlinejacc.org)
- During an earlier study we noticed that color flow velocity in the left ventricular outflow tract (LVOT) seemed low when SAM began, as deduced by others previously (8) . (onlinejacc.org)

###### initial velocity

- Determine the maximum height and range of a projectile fired at a height of 1.5 meters above the ground with an initial velocity of a 100 meters per second and at an angle of 30 degrees above the horizontal. (mathhelpforum.com)
- I tried to put the equations of (R and h) in the given equation for initial velocity,and it did work but the problem is i don't think this method is acceptable in exams. (physicsforums.com)

###### kinematics

- Velocity is an important concept in kinematics, the branch of classical mechanics that describes the motion of bodies. (wikipedia.org)

###### Instantaneous Velocity

- Velocity is defined as the rate of change of position with respect to time, which may also be referred to as the instantaneous velocity to emphasize the distinction from the average velocity. (wikipedia.org)
- In terms of a displacement-time (x vs. t) graph, the instantaneous velocity (or, simply, velocity) can be thought of as the slope of the tangent line to the curve at any point, and the average velocity as the slope of the secant line between two points with t coordinates equal to the boundaries of the time period for the average velocity. (wikipedia.org)

###### Relative Velocity

- Effect of friction, when relative velocity between the two contact surfaces is zero, cannot be described by the static friction model. (hindawi.com)

###### accurate velocity

- Designed for next-generation life science and healthcare applications, Juno ICs can profoundly improve the ability of design engineers to achieve greater motor efficiency, precise current control, and accurate velocity profiles. (prnewswire.com)
- When facing the ground, the optical flow sensors can be used for accurate velocity calculation, and the position can be obtained by integration. (hindawi.com)

###### torque

- WESTFORD, Mass. , Feb. 4, 2018 /PRNewswire/ -- SLAS2018 - Performance Motion Devices today announced Juno® Velocity and Torque Control Integrated Circuits (ICs), the industry's first family of compact ICs for velocity and torque control capable of four-quadrant current control. (prnewswire.com)
- The unique combination of velocity and torque control with intelligent safety and performance monitoring delivers the ultra-efficient motor control that will help our customers improve development time and system safety. (prnewswire.com)
- Attainment of high-performance motion/velocity control objectives for the Direct-Drive Rotary (DDR) torque motor should fully consider practical nonlinearities in controller design, such as dynamic friction. (hindawi.com)
- However, designing a high-performance position/velocity tracking controller for the DDR torque motor [ 5 ] remains a challenge as multiple factors affecting control precision and dynamic nonlinear friction must be considered [ 6 ]. (hindawi.com)

###### object's

- An object's state of motion describes how it is moving. (study.com)
- Proper velocity w = dx/dτ is the product of two other derivatives in special relativity that describe an object's rate of travel: coordinate velocity v = dx/dt and the Lorentz factor γ = dt/dτ. (wikipedia.org)
- It equals the object's momentum p divided by its rest mass m, and is made up of the space-like components of the object's four-vector velocity. (wikipedia.org)

###### systolic

- Peak Am mitral annular velocity correlates well with CI and PCW, respectively, thus providing an easy means to assess LV systolic function and pulmonary congestion during cardiac pacing in chronic heart failure. (ovid.com)
- The purpose of this study was to determine whether the dynamic cause for mitral systolic anterior motion (SAM) is a Venturi or a flow drag (pushing) mechanism. (onlinejacc.org)
- Systolic anterior motion began mean 71 ± 5 ms after Q-wave onset. (onlinejacc.org)
- Systolic anterior motion begins at normal LVOT velocity. (onlinejacc.org)
- Systolic anterior motion (SAM) of the mitral valve is the cause of dynamic outflow obstruction in most patients with hypertrophic cardiomyopathy (HCM). (onlinejacc.org)

###### trajectories

- Fractional Brownian motions (FBMs) have been observed recently in the measured trajectories of individual molecules or small particles in the cytoplasm of living cells and in other dense composite systems, among others. (edu.pl)

###### equation

- From this derivative equation, in the one-dimensional case it can be seen that the area under a velocity vs. time (v vs. t graph) is the displacement, x. (wikipedia.org)

###### mitral

- Initially, investigators hypothesized that anterior motion is caused by a Venturi mechanism, whereby high velocity flow in the outflow tract lifts the mitral valve toward the septum. (onlinejacc.org)
- More recent investigations indicate that drag, the pushing force of flow, is the dominant hydrodynamic force that initiates anterior motion, pushing the protruding mitral leaflet into the septum (6-9) . (onlinejacc.org)

###### dimensions

- The motion of a creature in three dimensions can be described by the following equations for position in the x -, y -, and z -directions. (sparknotes.com)

###### analyze

- Abstract: Motivated by applications in mathematical biology concerning randomlyalternating motion of micro-organisms, we analyze a generalized integratedtelegraph process. (duhnnae.com)

###### parameters

- Mean values of TDI velocities and hemodynamic parameters were not significantly different between each pacing configuration. (ovid.com)
- Static parameters are identified through a series of constant velocity experiments, while dynamic parameters are obtained through a presliding process. (hindawi.com)

###### uniform

- Newton's first law, usually called the law of inertia states that: an object in a state of uniform motion tends to remain in that state of motion unless acted on by an outside force. (study.com)

###### CONCLUSIONS

- CONCLUSIONS: The simultaneous assessment of CFV and wall motion was feasible in the majority of cases during dipyridamole stress echocardiography. (biomedsearch.com)

###### calculus

- In calculus terms, the integral of the velocity function v(t) is the displacement function x(t). (wikipedia.org)

###### peak

- demonstrated that during walking, the peak of the velocity tuning of the cells of the horizontal system is shifted toward higher velocities compared with resting flies. (jneurosci.org)

###### thus

- Thus, constant motion of an observer with regard to a static charge and its extended static field (either a gravitational or electric field) does not change the field. (wikipedia.org)
- Constant direction constrains the object to motion in a straight path thus, a constant velocity means motion in a straight line at a constant speed. (wikipedia.org)

###### vector

- Like coordinate velocity and unlike four-vector velocity, it resides in the three-dimensional slice of spacetime defined by the map frame. (wikipedia.org)
- Soon after the publication in international conventions and journal articles, similar techniques based on these ideas have been implemented by the medical imaging industry, e.g. by Siemens under the designation "Vector Velocity Imaging" (2006). (wikipedia.org)
- Considering that the translational motion velocity vector v has three degrees of freedom (one for each dimension) gives the average energy per degree of freedom equal to one third of that, i.e. 1/2kT. (wikipedia.org)

###### position

- The scheme, which is based on extended Kalman filter, combines INS and optical flow information to estimate the velocity and position of MAV. (hindawi.com)
- For example, optical flow sensor has been proved which can provide reliable velocity and position information when applied for robot localization or navigation [ 10 , 11 ]. (hindawi.com)
- Since the Galileo devices are based on a see-saw motion the amplitude can be varied by the foot position: the further apart the feet the larger the amplitude. (wikipedia.org)
- By convention, astronomers grouped stars into constellations and used them to track the motions of the planets and the inferred position of the Sun. The motion of the Sun against the background stars (and the horizon) was used to create calendars, which could be used to regulate agricultural practices. (wikipedia.org)
- The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. (wikipedia.org)
- Since the derivative of the position with respect to time gives the change in position (in metres) divided by the change in time (in seconds), velocity is measured in metres per second (m/s). (wikipedia.org)

###### tangential

- Lobula plate tangential cells of flies lend themselves well to study this question because they are known to code for ego-motion based on optic-flow. (jneurosci.org)
- We recorded the responses of the lobula plate tangential cell H1 to a visual pattern moving at different velocities under three different conditions: fixed flies before and after application of the octopamine agonist chlordimeform (CDM) and tethered flying flies. (jneurosci.org)

###### object

- In physics, a force is any interaction that, when unopposed, will change the motion of an object. (wikipedia.org)
- A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. (wikipedia.org)
- To have a constant velocity, an object must have a constant speed in a constant direction. (wikipedia.org)
- In some applications the "average velocity" of an object might be needed, that is to say, the constant velocity that would provide the same resultant displacement as a variable velocity in the same time interval, v(t), over some time period Δt. (wikipedia.org)
- The average velocity is always less than or equal to the average speed of an object. (wikipedia.org)

###### Galileo Galilei

- Most of the previous misunderstandings about motion and force were eventually corrected by Galileo Galilei and Sir Isaac Newton. (wikipedia.org)

###### significantly

- We found that flying as well as the application of CDM significantly broadens the velocity tuning of H1 toward higher velocities. (jneurosci.org)

###### echocardiography

- OBJECTIVES: This study was designed to assess the feasibility and clinical meaning of simultaneous assessment of wall motion and coronary flow velocity (CFV) reserve in the left anterior descending coronary artery (LAD) by transthoracic approach for detecting LAD stenosis during dipyridamole stress echocardiography. (biomedsearch.com)

###### determine

- Various types of FBMs differ in a number of ways, including the strength, range and type of damping of the memory encoded in their definitions, but share several basic characteristics: distributions, non-ergodic properties, and scaling of the second moment, which makes it difficult to determine which type of Brownian motion (fractional or normal) the measured trajectory belongs to. (edu.pl)
- Piazzi noted that this motion meant that it was probably one of the closest stars, and suggested it would be a prime candidate for an attempt to determine its distance though parallax measurements, along with two other possibilities, Delta Eridani and Mu Cassiopeiae. (wikipedia.org)

###### magnetic

- The Larmor precession of the neutron spin in a preparation zone with a magnetic field before the sample encodes the individual velocities of neutrons in the beam into precession angles. (wikipedia.org)

###### space

- The motion of the Sun through space provides a longer baseline that will increase the accuracy of parallax measurements, known as secular parallax. (wikipedia.org)

###### Isaac Newton

- With his mathematical insight, Sir Isaac Newton formulated laws of motion that were not improved for nearly three hundred years. (wikipedia.org)

###### changes

- Since the dynamic range of visual motion stimuli strongly depends on the speed at which an animal is moving, we investigated whether the visual system adapts to such changes in stimulus dynamics as induced by self-motion. (jneurosci.org)
- Using extracellular recording, we investigated how the velocity tuning of H1, a well studied LPTC, changes during tethered flight. (jneurosci.org)
- Changes were observed in the radial velocity motion of the star, indicating a gravitational influence from orbiting objects. (wikipedia.org)
- This fact sometimes causes confusion about the "speed" of such static fields, which sometimes appear to change infinitely quickly when the changes in the field are mere artifacts of the motion of the observer, or of observation. (wikipedia.org)
- Changes in the motion of the attracting body are transmitted by some sort of waves. (wikipedia.org)
- If the scattering at the sample is not elastic but changes the neutron velocity, the rephasing will become incomplete and a loss of final polarization results, which depends on the distribution of differences in the time, which the neutrons need to fly through the symmetric first (coding) and second (decoding)precession zones. (wikipedia.org)
- The velocity changes of the neutrons convey the physical information which is available by using NSE, i.e. (wikipedia.org)
- For example, a car moving at a constant 20 kilometres per hour in a circular path has a constant speed, but does not have a constant velocity because its direction changes. (wikipedia.org)