Magnetic Resonance Imaging Guowang John Zhang
... and then to argue that a B, gradient is perhaps useful from a technical point of view; that is the hardware may be considerably simplified, gradient switching time is generally not an issue, pre-emphasis and zo compensation are not needed, and the lock channel is not effected by the gradient pulse. ...
... and then to argue that a B, gradient is perhaps useful from a technical point of view; that is the hardware may be considerably simplified, gradient switching time is generally not an issue, pre-emphasis and zo compensation are not needed, and the lock channel is not effected by the gradient pulse. ...
Dynamic interactions of electromagnetic and mechanical fields in
... concurrent capabilities such as sensing, self-healing, electromagnetic and heat functionality. The idea is to fabricate components that can integrate multiple capabilities in order to develop lighter and more efficient structures. In this regard, due to their combined structural and electrical funct ...
... concurrent capabilities such as sensing, self-healing, electromagnetic and heat functionality. The idea is to fabricate components that can integrate multiple capabilities in order to develop lighter and more efficient structures. In this regard, due to their combined structural and electrical funct ...
physics before and after einstein
... for this rejection was that his teachers, and most crucially Weber, did not appreciate his independence of thought and slightly irreverent demeanour, and were by that time determined to punish him for that.2 Thus it happened that the man who was to be arguably the greatest physicist of his century w ...
... for this rejection was that his teachers, and most crucially Weber, did not appreciate his independence of thought and slightly irreverent demeanour, and were by that time determined to punish him for that.2 Thus it happened that the man who was to be arguably the greatest physicist of his century w ...
Polarization reversal anti-parallel to the applied electric field
... Anti-parallel poling reversal is an unexpected phenomenon, although a similar phenomenon has been already reported by Abplanalp et al.9 using a 4 m thick barium titanate thin film. They detected the anti-parallel poling reversal phenomenon using a piezoresponse scanning force microscope, and report ...
... Anti-parallel poling reversal is an unexpected phenomenon, although a similar phenomenon has been already reported by Abplanalp et al.9 using a 4 m thick barium titanate thin film. They detected the anti-parallel poling reversal phenomenon using a piezoresponse scanning force microscope, and report ...
The Book (Pan Theory)
... -- The galactic red-shift: is not an expansion of space or a Doppler-shift -- How the universe started, its regeneration and future -- A “Single-Force-Field Theory”—fundamental forces as a state or condition -- All forces of physics explained by mechanical principles -- One fundamental force yieldin ...
... -- The galactic red-shift: is not an expansion of space or a Doppler-shift -- How the universe started, its regeneration and future -- A “Single-Force-Field Theory”—fundamental forces as a state or condition -- All forces of physics explained by mechanical principles -- One fundamental force yieldin ...
Desktop Assembly of Three Dimensional Nanostructures Using
... the difference in the random orientation, used by Dimaki and Bøggild [7]. It is also shown that by orienting the tubes perpendicular to the flow, the difference is at a minimum. Therefore, it is shown that the parallel orientation of CNTs in a fluid flow will enhance sorting using flow fractionaliza ...
... the difference in the random orientation, used by Dimaki and Bøggild [7]. It is also shown that by orienting the tubes perpendicular to the flow, the difference is at a minimum. Therefore, it is shown that the parallel orientation of CNTs in a fluid flow will enhance sorting using flow fractionaliza ...
Diffraction and Scattering of High Frequency Waves
... and the behaviours of both these phenomena are governed by linear wave equations. The study of such equations has been one of the more prominent areas of applied mathematics over the past century. This is partly because of the wide range of very important applications, and partly because of the many ...
... and the behaviours of both these phenomena are governed by linear wave equations. The study of such equations has been one of the more prominent areas of applied mathematics over the past century. This is partly because of the wide range of very important applications, and partly because of the many ...
electromagnetic radiation from lightning return strokes
... return strokes to elevated strike objects, using the extension of the engineering models to include an elevated strike object presented in the previous chapter. It is shown, for the first time, that the current distribution associated with these extended models exhibits a discontinuity at the return ...
... return strokes to elevated strike objects, using the extension of the engineering models to include an elevated strike object presented in the previous chapter. It is shown, for the first time, that the current distribution associated with these extended models exhibits a discontinuity at the return ...
Field (physics)
In physics, a field is a physical quantity that has a value for each point in space and time. For example, on a weather map, the surface wind velocity is described by assigning a vector to each point on a map. Each vector represents the speed and direction of the movement of air at that point. As another example, an electric field can be thought of as a ""condition in space"" emanating from an electric charge and extending throughout the whole of space. When a test electric charge is placed in this electric field, the particle accelerates due to a force. Physicists have found the notion of a field to be of such practical utility for the analysis of forces that they have come to think of a force as due to a field.In the modern framework of the quantum theory of fields, even without referring to a test particle, a field occupies space, contains energy, and its presence eliminates a true vacuum. This lead physicists to consider electromagnetic fields to be a physical entity, making the field concept a supporting paradigm of the edifice of modern physics. ""The fact that the electromagnetic field can possess momentum and energy makes it very real... a particle makes a field, and a field acts on another particle, and the field has such familiar properties as energy content and momentum, just as particles can have"". In practice, the strength of most fields has been found to diminish with distance to the point of being undetectable. For instance the strength of many relevant classical fields, such as the gravitational field in Newton's theory of gravity or the electrostatic field in classical electromagnetism, is inversely proportional to the square of the distance from the source (i.e. they follow the Gauss's law). One consequence is that the Earth's gravitational field quickly becomes undetectable on cosmic scales.A field can be classified as a scalar field, a vector field, a spinor field or a tensor field according to whether the represented physical quantity is a scalar, a vector, a spinor or a tensor, respectively. A field has a unique tensorial character in every point where it is defined: i.e. a field cannot be a scalar field somewhere and a vector field somewhere else. For example, the Newtonian gravitational field is a vector field: specifying its value at a point in spacetime requires three numbers, the components of the gravitational field vector at that point. Moreover, within each category (scalar, vector, tensor), a field can be either a classical field or a quantum field, depending on whether it is characterized by numbers or quantum operators respectively. In fact in this theory an equivalent representation of field is a field particle, namely a boson.