Guendelman2008
... (1,1) +(S, -S), S being the expression given before. So the amplitude for axion going into photon (1,-1) is S, this agrees with a known result obtained by P. Sikivie many years ago for this type of external static magnetic field. ...
... (1,1) +(S, -S), S being the expression given before. So the amplitude for axion going into photon (1,-1) is S, this agrees with a known result obtained by P. Sikivie many years ago for this type of external static magnetic field. ...
Diamagnetically-stabilized levitation
... relative permeability of μr < 1. All materials have diamagnetic properties, but the effect is very weak, and usually overcome by the object's paramagnetic or ferromagnetic properties, which act in the opposite manner. Any material in which the diamagnetic component is strongest will be repelled by ...
... relative permeability of μr < 1. All materials have diamagnetic properties, but the effect is very weak, and usually overcome by the object's paramagnetic or ferromagnetic properties, which act in the opposite manner. Any material in which the diamagnetic component is strongest will be repelled by ...
electric and magnetic fields and your health
... who, because of where they live or work, may have higher exposures to magnetic fields than other people. There is general agreement that if ELF magnetic fields were associated with an increased risk of comparatively rare cancers, they would not directly initiate the tumour. If they do play some role ...
... who, because of where they live or work, may have higher exposures to magnetic fields than other people. There is general agreement that if ELF magnetic fields were associated with an increased risk of comparatively rare cancers, they would not directly initiate the tumour. If they do play some role ...
esa`s magnetic field mission
... OUR PLANET In simple terms, Earth’s magnetic field behaves as if there were a powerful bar magnet at the centre of the planet, tilted at about 11° to the axis of rotation. In reality, however, the processes involved in generating the field are far more complex. The magnetic field is thought to be la ...
... OUR PLANET In simple terms, Earth’s magnetic field behaves as if there were a powerful bar magnet at the centre of the planet, tilted at about 11° to the axis of rotation. In reality, however, the processes involved in generating the field are far more complex. The magnetic field is thought to be la ...
Introduction to Spintronics
... spin channels in the ferromagnetic materials and the quantum tunnel effect TMR junctions have resistance ratio of about 70% MgO barrier junctions have produced 230% MR ...
... spin channels in the ferromagnetic materials and the quantum tunnel effect TMR junctions have resistance ratio of about 70% MgO barrier junctions have produced 230% MR ...
Influence of frequent magnetic field on chlorophyll content in leaves
... Chlorophyll contents were examined in the leaves of 3 varieties of sugar beet: triploid Jamira and diploid Jastra and PN Mono 1. The chlorophyll content was measured in the leaves of living plants in the field, from the end of June till the beginning of September during 3 successive years: 1999, 200 ...
... Chlorophyll contents were examined in the leaves of 3 varieties of sugar beet: triploid Jamira and diploid Jastra and PN Mono 1. The chlorophyll content was measured in the leaves of living plants in the field, from the end of June till the beginning of September during 3 successive years: 1999, 200 ...
Magnetic susceptibility in MRI
... Magnetic behaviours Four different types of behaviour may be distinguished: Diamagnetism: χ is negative and of the order of 10-6. Paramagnetism: χ is positive and typically in the range 10-5-10-3. Superparamagnetism: appears in small ferromagnetic nanoparticles. Their magnetic susceptibility ...
... Magnetic behaviours Four different types of behaviour may be distinguished: Diamagnetism: χ is negative and of the order of 10-6. Paramagnetism: χ is positive and typically in the range 10-5-10-3. Superparamagnetism: appears in small ferromagnetic nanoparticles. Their magnetic susceptibility ...
Seafloor Spreading
... magnetic reversals on land, scientists were able to determine the age of the ocean floor from magnetic recording and to create isochron maps of the ocean ...
... magnetic reversals on land, scientists were able to determine the age of the ocean floor from magnetic recording and to create isochron maps of the ocean ...
Lab The Electric Motor
... 11. Rewire the motor so that the armature and the electromagnet are in parallel with each other. In addition, connect two ammeters so that one registers the current only in the armature and the other registers the current only in the electromagnet. Draw the schematic diagram for this circuit below. ...
... 11. Rewire the motor so that the armature and the electromagnet are in parallel with each other. In addition, connect two ammeters so that one registers the current only in the armature and the other registers the current only in the electromagnet. Draw the schematic diagram for this circuit below. ...
The Electron-Positron Sea
... specific alignment of tiny molecular vortices that are surrounded by electric particles [1]. In Maxwell’s model, the individual magnetic lines of force consist of these tiny vortices mutually aligned along their rotation axes. ...
... specific alignment of tiny molecular vortices that are surrounded by electric particles [1]. In Maxwell’s model, the individual magnetic lines of force consist of these tiny vortices mutually aligned along their rotation axes. ...
KISS Notes
... The Stator is the part that remains stationary. It may be a permanent magnet, or an electromagnet. Its purpose is to provide the magnetic field. ...
... The Stator is the part that remains stationary. It may be a permanent magnet, or an electromagnet. Its purpose is to provide the magnetic field. ...
Theoretical Analysis on Crystal Alignment of Feeble Magnetic
... Institute of Chemistry, Chinese Academy of Science, Zhong Guan Cun Beiyijie No. 2 Hai Ding region, Beijing 10080, China ...
... Institute of Chemistry, Chinese Academy of Science, Zhong Guan Cun Beiyijie No. 2 Hai Ding region, Beijing 10080, China ...
About Electric Motors
... working motor to the instructor within a period of one week. Students are allowed to receive help from parents, siblings or friends. The hands-on nature of the project ensures that some learning will take place regardless of the amount of help the student receives. The project is generally well rece ...
... working motor to the instructor within a period of one week. Students are allowed to receive help from parents, siblings or friends. The hands-on nature of the project ensures that some learning will take place regardless of the amount of help the student receives. The project is generally well rece ...
Other types of electromagnetic clutches
... A horseshoe magnet (A-1) has a north and south pole. If a piece of carbon steel contacts both poles, a magnetic circuit is created. In an electromagnetic clutch, the north and south pole is created by a coil shell and a wound coil. In a clutch, (B1) when power is applied, a magnetic field is created ...
... A horseshoe magnet (A-1) has a north and south pole. If a piece of carbon steel contacts both poles, a magnetic circuit is created. In an electromagnetic clutch, the north and south pole is created by a coil shell and a wound coil. In a clutch, (B1) when power is applied, a magnetic field is created ...
and magnetism - Black River Local Schools
... north (or actually the South Pole of the earth magnet) and not to geographic north. Magnetic north is located in northern Canada and is separated from geographic north by more than 1400 km. Navigators make corrections for this fact when using a compass. ...
... north (or actually the South Pole of the earth magnet) and not to geographic north. Magnetic north is located in northern Canada and is separated from geographic north by more than 1400 km. Navigators make corrections for this fact when using a compass. ...
Germain ROUSSEAUX
... the Newtonian idea of instantaneous action at a distance and it leads notably to the strange consequence that two consecutive elements of the same current should repel each other. Ampère presumed to have demonstrated experimentally this repulsion force, but on this point he was wrong. The modern met ...
... the Newtonian idea of instantaneous action at a distance and it leads notably to the strange consequence that two consecutive elements of the same current should repel each other. Ampère presumed to have demonstrated experimentally this repulsion force, but on this point he was wrong. The modern met ...
Germain ROUSSEAUX.
... our findings will give a theoretical basis for the interpretation of modern experiments displaying effects outside the scope of the current understanding/interpretation of electrodynamics. The socalled Larmor torque will allow us to introduce easily the so-called Helmholtz mechanical tension which i ...
... our findings will give a theoretical basis for the interpretation of modern experiments displaying effects outside the scope of the current understanding/interpretation of electrodynamics. The socalled Larmor torque will allow us to introduce easily the so-called Helmholtz mechanical tension which i ...
Basic Principles of MRI
... Gamma rays are detected by a gamma camera that forms the final image. Most commonly, nuclear medicine and SPECT are used to measure the flow and distribution of blood into the heart and other organs. Compared to MRI, these modalities produce images of much lower resolution but are specifically tail ...
... Gamma rays are detected by a gamma camera that forms the final image. Most commonly, nuclear medicine and SPECT are used to measure the flow and distribution of blood into the heart and other organs. Compared to MRI, these modalities produce images of much lower resolution but are specifically tail ...
NMR Lecture II - Structure Determination
... they can change the nuclear spins of some elements, ...
... they can change the nuclear spins of some elements, ...
Quantitative imaging
... voxels for describing physical, chemical, or biological properties of tissue. Radiology today is increasingly confronted with the demand of obtaining functional imaging information beyond morphology. This quantitative information should result in an improved characterization and stratification of di ...
... voxels for describing physical, chemical, or biological properties of tissue. Radiology today is increasingly confronted with the demand of obtaining functional imaging information beyond morphology. This quantitative information should result in an improved characterization and stratification of di ...
Motion of gyroscopes around Schwarzschild and Kerr BH
... II International Black Holes Workshop, Lisbon ...
... II International Black Holes Workshop, Lisbon ...
STEINERT Magnetic Drum
... materials. They protect processing equipment from damage by tramp iron. ...
... materials. They protect processing equipment from damage by tramp iron. ...
Magnet
A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, ""Magnesian stone"") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.Ferromagnetic materials can be divided into magnetically ""soft"" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically ""hard"" materials, which do. Permanent magnets are made from ""hard"" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. ""Hard"" materials have high coercivity, whereas ""soft"" materials have low coercivity.An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of ""soft"" ferromagnetic material such as steel, which greatly enhances the magnetic field produced by the coil.The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.