The ideal dimensions of a Halbach cylinder of finite length
... dimensions of a Halbach cylinder, i.e. the external radius and the length of the smallest Halbach cylinder, given a desired internal radius, length of the sample volume and mean flux density in this volume. This is done through a numerical modeling of the Halbach cylinder design where the dimensions ...
... dimensions of a Halbach cylinder, i.e. the external radius and the length of the smallest Halbach cylinder, given a desired internal radius, length of the sample volume and mean flux density in this volume. This is done through a numerical modeling of the Halbach cylinder design where the dimensions ...
Polarimetry in Astrophysics and Cosmology
... Polarimetry also plays an important role in modern cosmology. Inflation theory predicts two types of polarization in the Cosmic Microwave Background (CMB) radiation, called E-modes and B-modes. Measurements to date of the E-mode signal are consistent with the predictions of anisotropic Thompson scat ...
... Polarimetry also plays an important role in modern cosmology. Inflation theory predicts two types of polarization in the Cosmic Microwave Background (CMB) radiation, called E-modes and B-modes. Measurements to date of the E-mode signal are consistent with the predictions of anisotropic Thompson scat ...
Boundary-value Problems in Electrostatics I
... In the real system, there is some surface charge density σ(x, y) on the conductor; to determine what this is, we have only to evaluate the normal component of the electric field at the surface of the conductor, ...
... In the real system, there is some surface charge density σ(x, y) on the conductor; to determine what this is, we have only to evaluate the normal component of the electric field at the surface of the conductor, ...
Production and evolution of axion dark matter in the early universe
... when it was proposed. In the original model, the axion was “visible” in the sense that it gives some predictions for laboratory experiments. Unfortunately, no signature was observed, and the prototype axion model was ruled out soon after the proposal [15]. However, it was argued that models with hig ...
... when it was proposed. In the original model, the axion was “visible” in the sense that it gives some predictions for laboratory experiments. Unfortunately, no signature was observed, and the prototype axion model was ruled out soon after the proposal [15]. However, it was argued that models with hig ...
Homework Section 1
... one considers where the current is flowing. Assume that for the specific strip cable that the wires are filamentary strands of metal (typically Cu) and that the net flow on one wire is balanced by an opposite net flow on the other wire. First show that the surface current density on the wires should ...
... one considers where the current is flowing. Assume that for the specific strip cable that the wires are filamentary strands of metal (typically Cu) and that the net flow on one wire is balanced by an opposite net flow on the other wire. First show that the surface current density on the wires should ...
exact time-dependent density functional and Floquet theory
... functional theory (TDDFT) [7]. In practise, the interacting system is replaced by an auxiliary non-interacting system for which the Kohn-Sham (KS) equation is solved [8–12]. In the latter, an exchange-correlation potential needs to be approximated, as the exact one is unknown. Moreover, some of the ...
... functional theory (TDDFT) [7]. In practise, the interacting system is replaced by an auxiliary non-interacting system for which the Kohn-Sham (KS) equation is solved [8–12]. In the latter, an exchange-correlation potential needs to be approximated, as the exact one is unknown. Moreover, some of the ...
local - Physics
... he world we live in is a strange and wonderful place. The vast majority of our interactions with objects around us can be described and predicted by relatively simple equations and relations, which have been fully understood for centuries now. The concept of this tactile world is however, a result o ...
... he world we live in is a strange and wonderful place. The vast majority of our interactions with objects around us can be described and predicted by relatively simple equations and relations, which have been fully understood for centuries now. The concept of this tactile world is however, a result o ...
Vacuum Energy
... (such as specific heat) in conflict with observation. Planck then became convinced that no classical discussion could lead in a satisfactory manner to a derivation of his distribution for black body radiation, in other words the distribution was fundamental and h could not be derived from previously ...
... (such as specific heat) in conflict with observation. Planck then became convinced that no classical discussion could lead in a satisfactory manner to a derivation of his distribution for black body radiation, in other words the distribution was fundamental and h could not be derived from previously ...
Visible Continuum Measurements on the C PFC/RR-87-2
... from the T-3 Tokamak indicated that tokamak plasmas could be confined for much longer times (30 Bohm times) and at much higher temperatures (1 KeV) than other plasma confinement devices which were operating at that time. Since then, tokamak research has advanced significantly. Well confined, stable ...
... from the T-3 Tokamak indicated that tokamak plasmas could be confined for much longer times (30 Bohm times) and at much higher temperatures (1 KeV) than other plasma confinement devices which were operating at that time. Since then, tokamak research has advanced significantly. Well confined, stable ...
Gravitation, electromagnetism and the cosmological constant in
... is a metric theory, implies that purely affine gravity is consistent with experimental tests of the weak equivalence principle [34]. Moreover, experimental tests of the interaction between the gravitational and electromagnetic fields are restricted to the motion of quanta of the electromagnetic fiel ...
... is a metric theory, implies that purely affine gravity is consistent with experimental tests of the weak equivalence principle [34]. Moreover, experimental tests of the interaction between the gravitational and electromagnetic fields are restricted to the motion of quanta of the electromagnetic fiel ...
The DRIFT Dark Matter Project - School of Physics and Astronomy
... nuclei at the low energies of interest to dark matter searches. A Monte Carlo simulation has then been employed to determine the WIMP-nucleon sensitivity achievable using DRIFT detectors of the present performance, also examining what would be achievable if this was supplemented by a realistic activ ...
... nuclei at the low energies of interest to dark matter searches. A Monte Carlo simulation has then been employed to determine the WIMP-nucleon sensitivity achievable using DRIFT detectors of the present performance, also examining what would be achievable if this was supplemented by a realistic activ ...
higher dimensional defects in cosmology tufts university
... staying at the top of its potential (represented by the constant line, which is the lower-sign/unstable solution of eq.(3.26)) for quite a period of time before rolls down to its stable compactification. This is obtained for η = 2.4070426 and λ = 6.7275. . 111 4.7 The time-evolution of the scalar p( ...
... staying at the top of its potential (represented by the constant line, which is the lower-sign/unstable solution of eq.(3.26)) for quite a period of time before rolls down to its stable compactification. This is obtained for η = 2.4070426 and λ = 6.7275. . 111 4.7 The time-evolution of the scalar p( ...
Jan Wicherink Jan Wicherink
... First of all my thanks goes to David Wilcock who’s work and books have had a major impact on my life and has been the initial inspiration to write this book. For many years I’d been studying spiritual literature, but my mind was fully blown away when I first read ‘Shift of the Ages’, ‘Science of One ...
... First of all my thanks goes to David Wilcock who’s work and books have had a major impact on my life and has been the initial inspiration to write this book. For many years I’d been studying spiritual literature, but my mind was fully blown away when I first read ‘Shift of the Ages’, ‘Science of One ...
PUBLISHED VERSION Two-fluid simulations of driven reconnection
... coils and thus the complicated physics of breakdown and fluxrope formation. These initial conditions correspond to the time after the flux-ropes have detached from the P3 coils, but before they have moved towards the mid-plane (note that this detachment prior to merging is inferred from fast camera ...
... coils and thus the complicated physics of breakdown and fluxrope formation. These initial conditions correspond to the time after the flux-ropes have detached from the P3 coils, but before they have moved towards the mid-plane (note that this detachment prior to merging is inferred from fast camera ...
Observational motivation for Dark Matter
... After transition to matter domination, T drops but Baryons and photons are still connected Due to abundance of photons, only when T~eV matter suddenly recombines Transfer from Thomson cross section to neutral Hydrogen makes the universe transparent to photons (but not to electrons!) Requires a full ...
... After transition to matter domination, T drops but Baryons and photons are still connected Due to abundance of photons, only when T~eV matter suddenly recombines Transfer from Thomson cross section to neutral Hydrogen makes the universe transparent to photons (but not to electrons!) Requires a full ...
Astroparticle physics at LHC - Institute of Physics (IoP)
... correspondence between the cosmic microwave background anisotropies and the largescale structure of the Universe, could be given by a form of non electromagnetic interacting, invisible matter, hence called dark matter. An undetected heavy elementary relic particle that interacts only trough the grav ...
... correspondence between the cosmic microwave background anisotropies and the largescale structure of the Universe, could be given by a form of non electromagnetic interacting, invisible matter, hence called dark matter. An undetected heavy elementary relic particle that interacts only trough the grav ...
Astronomy 201 Cosmology
... and time, curvature of spacetime) • set of 10 coupled partial differential equations • non linear (solutions do not superpose) • space and time are part of the solution exact solution known only for a very few simple cases •Andris Skuja, May 9, 2006 -- Physics 270 ...
... and time, curvature of spacetime) • set of 10 coupled partial differential equations • non linear (solutions do not superpose) • space and time are part of the solution exact solution known only for a very few simple cases •Andris Skuja, May 9, 2006 -- Physics 270 ...
Chapter 4 Assumptions
... He used the reduced Planck constant ħ 1.055 10‐34 kg m2/s, the Newtonian gravitational constant G 6.672 10‐11 m3/s2kg, the speed of light c 2.998 108 m/s and the Coulomb constant 1/4πεo 8.987 109 m3kg/s2C2. This combination of constants can be used to make units of length, time ...
... He used the reduced Planck constant ħ 1.055 10‐34 kg m2/s, the Newtonian gravitational constant G 6.672 10‐11 m3/s2kg, the speed of light c 2.998 108 m/s and the Coulomb constant 1/4πεo 8.987 109 m3kg/s2C2. This combination of constants can be used to make units of length, time ...
Elements of Astrophysics
... give the students a fairly uniform base in the relevant physics that they can use as a starting point and introduction to the more detailed textbooks they will need to use when they come to address serious problems. The books that I have drawn upon extensively in devising this course are Rybicki and ...
... give the students a fairly uniform base in the relevant physics that they can use as a starting point and introduction to the more detailed textbooks they will need to use when they come to address serious problems. The books that I have drawn upon extensively in devising this course are Rybicki and ...
On Wave Dark Matter, Shells in Elliptical Galaxies, and the Axioms
... In the classical dynamical model of an elliptical, phase space is populated very smoothly. Therefore, the existence of ripples directly challenges the classical picture of ellipticals. One likely possibility is that ellipticals acquire ripples late in life as a result of accreting material from a sy ...
... In the classical dynamical model of an elliptical, phase space is populated very smoothly. Therefore, the existence of ripples directly challenges the classical picture of ellipticals. One likely possibility is that ellipticals acquire ripples late in life as a result of accreting material from a sy ...
Schutz A First Course in General Relativity(Second Edition).
... theoretical physics today, having an impact as great on fundamental theories of particle physics as on cosmological questions. I have organized Ch. 12 around this perspective, developing mathematical models of an expanding universe that include the cosmological constant, then discussing in detail ho ...
... theoretical physics today, having an impact as great on fundamental theories of particle physics as on cosmological questions. I have organized Ch. 12 around this perspective, developing mathematical models of an expanding universe that include the cosmological constant, then discussing in detail ho ...
Full-Wave Simulation of High-Frequency Electromagnetic
... aspect ratio and high plasma shaping maximise the achievable β, and has been verified experimentally over a wide range of tokamaks [3]. This has the consequence that a given temperature and pressure can be achieved using a significantly smaller magnetic field, making such a device more economical to ...
... aspect ratio and high plasma shaping maximise the achievable β, and has been verified experimentally over a wide range of tokamaks [3]. This has the consequence that a given temperature and pressure can be achieved using a significantly smaller magnetic field, making such a device more economical to ...
Three-dimensional head model simulation of transcranial magnetic
... system, the total error of the system, and the energy error of the system based on the energy of the B field components where (reported as a percentage of the total energy). Following each pass, the solution is adapted automatically by refining the mesh and adjusting the individual tetrahedra with t ...
... system, the total error of the system, and the energy error of the system based on the energy of the B field components where (reported as a percentage of the total energy). Following each pass, the solution is adapted automatically by refining the mesh and adjusting the individual tetrahedra with t ...
The Case for an Accelerating Universe from
... Cen 1997 ; Lin et al. 1996 ; Strauss & Willick 1995). The high-redshift SNe Ia from both teams are 0.28 mag dimmer or 14% farther than expected in a universe with this much matter and no cosmological constant. The statistical uncertainty of these values is 0.08 and 0.06 mag (or 4% and 3% in distance ...
... Cen 1997 ; Lin et al. 1996 ; Strauss & Willick 1995). The high-redshift SNe Ia from both teams are 0.28 mag dimmer or 14% farther than expected in a universe with this much matter and no cosmological constant. The statistical uncertainty of these values is 0.08 and 0.06 mag (or 4% and 3% in distance ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.