File - ELECTRICAL ENGINEERING DEPT, DCE
... 2. Explain in detail, the methods of speed control of a DC shunt motor. 3. Explain the working of four point starter. 4. Explain in detail, the process of commutation and methods of commutation. ...
... 2. Explain in detail, the methods of speed control of a DC shunt motor. 3. Explain the working of four point starter. 4. Explain in detail, the process of commutation and methods of commutation. ...
(1c): Pair production is the process, whereby a g ray disappears
... ordinary star is , whereas that of the neutron star is (see Fig. 1). The time it takes for these maximum displacements is . The radiation characteristics of the ordinary star indicate that its surface temperature is T and the radiated energy incident on a unit area on earth’s surface per unit ...
... ordinary star is , whereas that of the neutron star is (see Fig. 1). The time it takes for these maximum displacements is . The radiation characteristics of the ordinary star indicate that its surface temperature is T and the radiated energy incident on a unit area on earth’s surface per unit ...
Axial hypertoroidal moment in a ferroelectric nanotorus: A way
... [8,24]. On the contrary, at low values of a < 0.2, there is no second transition, and phase II remains stable down to low temperatures [Fig. 2(e)]. For an intermediate value 0.2 < a < 0.3, the competition between these two interactions ...
... [8,24]. On the contrary, at low values of a < 0.2, there is no second transition, and phase II remains stable down to low temperatures [Fig. 2(e)]. For an intermediate value 0.2 < a < 0.3, the competition between these two interactions ...
mean-field approach to magnetism
... calculate exactly the partition function, the natural way to work is to do some approximations. Several approximation methods are known between them the easiest one is the mean-field approximation. Other well-known approximations are the low and high temperature expansion, renormalization, scaling o ...
... calculate exactly the partition function, the natural way to work is to do some approximations. Several approximation methods are known between them the easiest one is the mean-field approximation. Other well-known approximations are the low and high temperature expansion, renormalization, scaling o ...
Pollack`s Findings about Fourth Phase of Water: TGD
... (b) Could the electric expansion/phase transition to dark phase be adiabatic involving therefore no heat transfer between the expanding water and environment? If so, it would transform some thermal energy of expanding water to work and reduce its temperature. The formula for the adiabatic expansion ...
... (b) Could the electric expansion/phase transition to dark phase be adiabatic involving therefore no heat transfer between the expanding water and environment? If so, it would transform some thermal energy of expanding water to work and reduce its temperature. The formula for the adiabatic expansion ...
Chapter 1. Polymeric Liquid crystals. 1.1. Polymeric Liquid crystals
... Polymeric Liquid crystals: general overview. ...
... Polymeric Liquid crystals: general overview. ...
0739.PDF
... compressive failure of high strength ceramics. It is possible, that under high hydrostatic pressures due to confinement, or near crack tips due to highpressure singularity points, one can find dislocations, which are associated with plasticity. However, the difference in the behavior at the transiti ...
... compressive failure of high strength ceramics. It is possible, that under high hydrostatic pressures due to confinement, or near crack tips due to highpressure singularity points, one can find dislocations, which are associated with plasticity. However, the difference in the behavior at the transiti ...
Ferroelectrics
... termed antiferroelectric. • If a material exhibits ferroelectric effects in one polar direction, and antiferroelectric effects perpendicular, it may be termed ferrielectric. ...
... termed antiferroelectric. • If a material exhibits ferroelectric effects in one polar direction, and antiferroelectric effects perpendicular, it may be termed ferrielectric. ...
B f i
... One important fact to note from the last equation is that the efficiency of the spontaneous emission process increases as the third power of the frequency. Thus at very high frequencies, e.g. X-rays, the excited states are so short lived that significant populations of excited states are hard to mai ...
... One important fact to note from the last equation is that the efficiency of the spontaneous emission process increases as the third power of the frequency. Thus at very high frequencies, e.g. X-rays, the excited states are so short lived that significant populations of excited states are hard to mai ...
YbPosterweb
... interaction occurs via the exchange of virtual Z-bosons between the electrons and nucleons within an atom. Because this interaction does not conserve parity the parity of atomic states, as defined by the electromagnetic interaction, is not completely preserved. ●The presence of a parity-violating in ...
... interaction occurs via the exchange of virtual Z-bosons between the electrons and nucleons within an atom. Because this interaction does not conserve parity the parity of atomic states, as defined by the electromagnetic interaction, is not completely preserved. ●The presence of a parity-violating in ...
The physics and geometry of fracture and frustration
... These nematic toroids share similarites with polymer bundles [5, 43, 61, 48, 60, 87, 31]. In fact, twisted DNA toroids have been analysed with liquid crystal theory [43, 99, 87]. Under the appropriate solvent conditions DNA condenses into toroids [53, 5]. These efficient packings of genetic material ...
... These nematic toroids share similarites with polymer bundles [5, 43, 61, 48, 60, 87, 31]. In fact, twisted DNA toroids have been analysed with liquid crystal theory [43, 99, 87]. Under the appropriate solvent conditions DNA condenses into toroids [53, 5]. These efficient packings of genetic material ...
Quantum critical point and spin fluctuations in the lower
... → HS) do not require any energy at the critical point since the HS and LS states have the same energy. We should emphasize here that these are fluctuations of the spin value contrary to the conventional fluctuations of the spin direction in the magnetic state. That is, the quantum spin fluctuations ...
... → HS) do not require any energy at the critical point since the HS and LS states have the same energy. We should emphasize here that these are fluctuations of the spin value contrary to the conventional fluctuations of the spin direction in the magnetic state. That is, the quantum spin fluctuations ...
Locking of Commensurate Phases in the Planar Model in an
... phase where spin orientations opposite to the field do not occur. It was argued' that at intermediate fields there This would be a first-order helix-fan phase transition. picture was in accord with the idea ' that the elementary excitation spectrum does not have a gap at zero wave vector k. The abse ...
... phase where spin orientations opposite to the field do not occur. It was argued' that at intermediate fields there This would be a first-order helix-fan phase transition. picture was in accord with the idea ' that the elementary excitation spectrum does not have a gap at zero wave vector k. The abse ...
Effect of operating temperature and film thickness on the pyroelectric
... the range of 0.01–0.04 C cm⫺2 K⫺1 . 11,12 However, even these modest values were obtained for ferroelectric materials operated above the Curie temperature in the bolometric mode in the presence of small bias fields to yield fieldinduced polarization in the paraelectric state of the material. To mi ...
... the range of 0.01–0.04 C cm⫺2 K⫺1 . 11,12 However, even these modest values were obtained for ferroelectric materials operated above the Curie temperature in the bolometric mode in the presence of small bias fields to yield fieldinduced polarization in the paraelectric state of the material. To mi ...
Plastic deformation of Fe–Al polycrystals strengthened with Zr
... ␣-Fe(Al) phase (A2 structure) and the D03 Fe3 Al phase [1]. The wide off-stoichiometric solubility range of B2 Fe–Al leads to only partial atomic order with constitutional defects. The Al content and especially the lattice order have a pronounced influence on the room temperature mechanical properti ...
... ␣-Fe(Al) phase (A2 structure) and the D03 Fe3 Al phase [1]. The wide off-stoichiometric solubility range of B2 Fe–Al leads to only partial atomic order with constitutional defects. The Al content and especially the lattice order have a pronounced influence on the room temperature mechanical properti ...
Weak magnetic field limit
... Another class of superconductors discovered March 08 based on iron and not copper FeAs(…) Highest Tc = 56K. The pairing mechanism is not well understood. Unlike BCS theory, it ...
... Another class of superconductors discovered March 08 based on iron and not copper FeAs(…) Highest Tc = 56K. The pairing mechanism is not well understood. Unlike BCS theory, it ...
Phase Transitions in Two-Dimensional Colloidal Systems
... on their spatial arrangement and on temperature. A - sometimes subtle - balance between the internal energy and entropy dictates the thermodynamic phase behavior of the bulk material. Depending on temperature, pressure or density different phases may appear with completely different response to exte ...
... on their spatial arrangement and on temperature. A - sometimes subtle - balance between the internal energy and entropy dictates the thermodynamic phase behavior of the bulk material. Depending on temperature, pressure or density different phases may appear with completely different response to exte ...
1 The Paramagnet to Ferromagnet Phase Transition
... nickel goes from having no magnetic moment to having a magnetic moment. See Fig. 1. This is a sudden qualitative change and when this happens we say that a phase transition has occurred. Here the phase transition occurs when the magnetic moment goes from zero to non-zero. It is from the paramagnetic ...
... nickel goes from having no magnetic moment to having a magnetic moment. See Fig. 1. This is a sudden qualitative change and when this happens we say that a phase transition has occurred. Here the phase transition occurs when the magnetic moment goes from zero to non-zero. It is from the paramagnetic ...
4. Humanities-Computational of the Magnetic
... partition points is not constant, so its chemical potential is zero. 2.3 The Magnetic Critical Point Exponent (β) Critical point exponents describe the behaviour near the critical point of the various quantities of interest at phase transition. Examples are the exponents that describe: pressure, hea ...
... partition points is not constant, so its chemical potential is zero. 2.3 The Magnetic Critical Point Exponent (β) Critical point exponents describe the behaviour near the critical point of the various quantities of interest at phase transition. Examples are the exponents that describe: pressure, hea ...
Head
... Note that the output voltage is proportional to the number of coil turns N, the head-tomedium velocity V, and the written remanency MR.. The term in parentheses in Eq. (3.5) is called the thickness loss and it shows that the read head is unable to sense the magnetization patterns written deep int th ...
... Note that the output voltage is proportional to the number of coil turns N, the head-tomedium velocity V, and the written remanency MR.. The term in parentheses in Eq. (3.5) is called the thickness loss and it shows that the read head is unable to sense the magnetization patterns written deep int th ...
pptx - MPP Theory Group
... AdS2 x R2. Hartnoll and Hoffman (2012) showed that at low T, ρ can be extracted from the two point function of the charge density evaluated at the lattice wavenumber: ...
... AdS2 x R2. Hartnoll and Hoffman (2012) showed that at low T, ρ can be extracted from the two point function of the charge density evaluated at the lattice wavenumber: ...
An optically detected cyclotron resonance study of bulk GaAs
... y is then a dimensionless parameter, being the ratio of the zero-point cyclotron energy to the effective Rydberg. The situation has become somewhat muddled as various authors have labelled high-field states with their corresponding low-field label, a correspondencethat further theoretical work has s ...
... y is then a dimensionless parameter, being the ratio of the zero-point cyclotron energy to the effective Rydberg. The situation has become somewhat muddled as various authors have labelled high-field states with their corresponding low-field label, a correspondencethat further theoretical work has s ...
Chapter 7 Landau and Mean Field Theory
... Even though the exponent is rational, the function is decidedly not analytic. This was (and remains) very strange compared to most of physics. The partition function of any finite system is a continuous function of all the parameters. Thus if any non-analyticity occurs, it must be a property of taki ...
... Even though the exponent is rational, the function is decidedly not analytic. This was (and remains) very strange compared to most of physics. The partition function of any finite system is a continuous function of all the parameters. Thus if any non-analyticity occurs, it must be a property of taki ...
PDF only - at www.arxiv.org.
... Another class of materials exhibiting magnetoelectricity consists on the rare-earth manganites, with general formula RMnO3, with R a rare-earth ion. Among them, the orthorhombic distorted perovskites with R = Eu to Dy exhibit magnetically-induced ferroelectricity at low temperatures.6 It has been pr ...
... Another class of materials exhibiting magnetoelectricity consists on the rare-earth manganites, with general formula RMnO3, with R a rare-earth ion. Among them, the orthorhombic distorted perovskites with R = Eu to Dy exhibit magnetically-induced ferroelectricity at low temperatures.6 It has been pr ...
Phase transition
A phase transition is the transformation of a thermodynamic system from one phase or state of matter to another one by heat transfer. The term is most commonly used to describe transitions between solid, liquid and gaseous states of matter, and, in rare cases, plasma. A phase of a thermodynamic system and the states of matter have uniform physical properties. During a phase transition of a given medium certain properties of the medium change, often discontinuously, as a result of the change of some external condition, such as temperature, pressure, or others. For example, a liquid may become gas upon heating to the boiling point, resulting in an abrupt change in volume. The measurement of the external conditions at which the transformation occurs is termed the phase transition. Phase transitions are common in nature and used today in many technologies.