New Journal of Physics Discriminating between antihydrogen and
... is never greater than about 2% and is this large only near the axial ends of the octupole where particles rarely reach. However, while the fields derived from A satisfy ∇ · B = 0 exactly, they do not quite satisfy ∇ × B = 0 and require the existence of unphysical currents, principally near the mirro ...
... is never greater than about 2% and is this large only near the axial ends of the octupole where particles rarely reach. However, while the fields derived from A satisfy ∇ · B = 0 exactly, they do not quite satisfy ∇ × B = 0 and require the existence of unphysical currents, principally near the mirro ...
Reference Temperatures
... to synthesize an ice-point reference. Now all we have to do is to read the digital voltmeter and convert the voltage reading to a temperature. Unfortunately, the temperature-versus-voltage relationship of a thermocouple is not linear. Output voltages for the more common thermocouples are plotted as ...
... to synthesize an ice-point reference. Now all we have to do is to read the digital voltmeter and convert the voltage reading to a temperature. Unfortunately, the temperature-versus-voltage relationship of a thermocouple is not linear. Output voltages for the more common thermocouples are plotted as ...
ADP194 英文数据手册DataSheet 下载
... Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to ab ...
... Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to ab ...
Plasmoid-induced-reconnection and fractal reconnection Kazunari Shibata and Syuniti Tanuma
... the plasmoid-induced-reconnection in more detail. We consider a situation where reconnection has just begun and a plasmoid, with a length L p and a width W p , has just started to form. The reconnection generates a jet (with the Alfvén speed V A ) which collides with the plasmoid and accelerates it ...
... the plasmoid-induced-reconnection in more detail. We consider a situation where reconnection has just begun and a plasmoid, with a length L p and a width W p , has just started to form. The reconnection generates a jet (with the Alfvén speed V A ) which collides with the plasmoid and accelerates it ...
Molecular Cloud Turbulence and Star Formation. Ballesteros
... of the interpretation that their overpressures were due to self-gravity, MCs could not be incorporated into global ISM models based on thermal pressure equilibrium, such as those by Field et al. (1969); McKee and Ostriker (1977); Wolfire et al. (1995). Recent work suggests instead that MCs are likel ...
... of the interpretation that their overpressures were due to self-gravity, MCs could not be incorporated into global ISM models based on thermal pressure equilibrium, such as those by Field et al. (1969); McKee and Ostriker (1977); Wolfire et al. (1995). Recent work suggests instead that MCs are likel ...
On topological charge carried by nexuses and center vortices
... instantons at the classical level. The possibility of fractional topological charge in two-dimensional CP N models was discussed long ago[24], and in d=4 gauge theories this has been discussed by numerous authors (a sample of such works prior to recent center vortex-nexus activity is [15, 25, 26, 27 ...
... instantons at the classical level. The possibility of fractional topological charge in two-dimensional CP N models was discussed long ago[24], and in d=4 gauge theories this has been discussed by numerous authors (a sample of such works prior to recent center vortex-nexus activity is [15, 25, 26, 27 ...
Long-term unsteadiness and large-scale structures in Rayleigh-Bénard convection
... Convection is one of the major modes of heat transfer and mass transfer and occurs in a wide range of (geo)physical situations, like in the atmosphere, the oceans and planetary mantles. It also plays an important role in many engineering applications, like crystal growth processes and in-door climat ...
... Convection is one of the major modes of heat transfer and mass transfer and occurs in a wide range of (geo)physical situations, like in the atmosphere, the oceans and planetary mantles. It also plays an important role in many engineering applications, like crystal growth processes and in-door climat ...
PDF file
... magnetic reconnection model which can explain these active phenomena, at least morphologically. In Chapter 2 we report a detailed examination of the fine structures inside flare ribbons and the temporal evolution of such structures. We examined systems of conjugate footpoints, inside flare ribbons b ...
... magnetic reconnection model which can explain these active phenomena, at least morphologically. In Chapter 2 we report a detailed examination of the fine structures inside flare ribbons and the temporal evolution of such structures. We examined systems of conjugate footpoints, inside flare ribbons b ...
Design of Powder Core Motors Reinap, Avo
... [46] remain unchanged from the change of number of poles. Hereby the same magnetic coupling and shear stress over an air-gap is assumed. The magnetic flux of a single pole that links with a single coil in a winding would not increase the mechanic torque by doubling the number of poles of a machine t ...
... [46] remain unchanged from the change of number of poles. Hereby the same magnetic coupling and shear stress over an air-gap is assumed. The magnetic flux of a single pole that links with a single coil in a winding would not increase the mechanic torque by doubling the number of poles of a machine t ...
Fast-ion transport and neutral beam current drive in
... has been subtracted. Between 655 and 657 nm, a filter blocks un-shifted Balmer alpha radiation from the plasma edge to avoid saturation effects. The spectral wing above 659 nm corresponds to the charge exchange radiation of fast-ions (FIDA radiation), which is more pronounced during off-axis NBI tha ...
... has been subtracted. Between 655 and 657 nm, a filter blocks un-shifted Balmer alpha radiation from the plasma edge to avoid saturation effects. The spectral wing above 659 nm corresponds to the charge exchange radiation of fast-ions (FIDA radiation), which is more pronounced during off-axis NBI tha ...
Superconductivity
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.