Ferromagnetism is a property of certain materials that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagnetic materials are familiar metals that are noticeably attracted to a magnet, a consequence of their substantial magnetic permeability. Magnetic permeability describes the induced magnetization of a material due to the presence of an external magnetic field. This temporarily induced magnetization, for example, inside a steel plate, accounts for its attraction to the permanent magnet. Whether or not that steel plate acquires a permanent magnetization itself depends not only on the strength of the applied field but on the so-called coercivity of the ferromagnetic material, which can vary greatly.
Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, magnetism is one of two aspects of electromagnetism.
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets. In addition, a nonuniform magnetic field exerts minuscule forces on "nonmagnetic" materials by three other magnetic effects: paramagnetism, diamagnetism, and antiferromagnetism, although these forces are usually so small they can only be detected by laboratory equipment. Magnetic fields surround magnetized materials, electric currents, and electric fields varying in time. Since both strength and direction of a magnetic field may vary with location, it is described mathematically by a function assigning a vector to each point of space, called a vector field.
A magnet 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, steel, nickel, cobalt, etc. and attracts or repels other magnets.
Remanence or remanent magnetization or residual magnetism is the magnetization left behind in a ferromagnetic material after an external magnetic field is removed. Colloquially, when a magnet is "magnetized", it has remanence. The remanence of magnetic materials provides the magnetic memory in magnetic storage devices, and is used as a source of information on the past Earth's magnetic field in paleomagnetism. The word remanence is from remanent + -ence, meaning "that which remains".
A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure.
A synchronous electric motor is an AC electric motor in which, at steady state, the rotation of the shaft is synchronized with the frequency of the supply current; the rotation period is exactly equal to an integral number of AC cycles. Synchronous motors use electromagnets as the stator of the motor which create a magnetic field that rotates in time with the oscillations of the current. The rotor with permanent magnets or electromagnets turns in step with the stator field at the same rate and as a result, provides the second synchronized rotating magnet field. A synchronous motor is termed doubly fed if it is supplied with independently excited multiphase AC electromagnets on both the rotor and stator.
Alnico is a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni), and cobalt (Co), hence the acronym al-ni-co. They also include copper, and sometimes titanium. Alnico alloys are ferromagnetic, and are used to make permanent magnets. Before the development of rare-earth magnets in the 1970s, they were the strongest type of permanent magnet. Other trade names for alloys in this family are: Alni, Alcomax, Hycomax, Columax, and Ticonal.
A subdermal implant is a body modification placed under the skin, allowing the body to heal over the implant and creating a raised design. Such implants fall under the broad category of body modification. Many subdermal implants are made out of silicone, either carved or mold injected. Many people who have subdermal implants use them in conjunction with other types of body modification to create a desired, dramatic effect. This process is also known as a 3-D implant, or pocketing.
A samarium–cobalt (SmCo) magnet, a type of rare-earth magnet, is a strong permanent magnet made of two basic elements: samarium and cobalt.
A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements. Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets. The magnetic field typically produced by rare-earth magnets can exceed 1.2 teslas, whereas ferrite or ceramic magnets typically exhibit fields of 0.5 to 1 tesla.
Body hacking is the application of the hacker ethic in pursuit of enhancement or change to the body's functions through technological means, such as do-it-yourself cybernetic devices or by introducing biochemicals.
In body modification, an implant is a device that is placed under the human skin for decorative purposes. Such implants may be subdermal or transdermal. In the context of body modification, some may consider injections of silicone and other substances a type of implant as well.
Mark N. Gasson is a British scientist and visiting research fellow at the Cybernetics Research Group, University of Reading, UK. He pioneered developments in direct neural interfaces between computer systems and the human nervous system, has developed brain–computer interfaces and is active in the research fields of human microchip implants, medical devices and digital identity. He is known for his experiments transmitting a computer virus into a human implant, and is credited with being the first human infected with a computer virus.
A dopant is a small amount of a substance added to a material to alter its physical properties, such as electrical or optical properties. The amount of dopant is typically very low compared to the material being doped.
Steve Haworth is a body modification artist based in Phoenix, Arizona. He is responsible for the invention and popularization of subdermal and transdermal implants, such as the "Metal Mohawk". He designed specialized medical instruments called dermal elevators for this process. He has also done pioneering work with surface bars, ear shaping, tongue splitting, magnetic implants, and artistic branding. He has worked on individuals noted for their extensive modifications such as The Enigma, Katzen, Stalking Cat, The Lizardman, and biohacker Tim Cannon. He is listed in the Guinness World Records as "Most Advanced Body Modification Artist", 1999 to present.
A human microchip implant is any electronic device implanted subcutaneously (subdermally) usually via an injection. Examples include an identifying integrated circuit RFID device encased in silicate glass which is implanted in the body of a human being. This type of subdermal implant usually contains a unique ID number that can be linked to information contained in an external database, such as identity document, criminal record, medical history, medications, address book, and other potential uses.
Tim Cannon is an American software developer, entrepreneur, and biohacker based in Pittsburgh, Pennsylvania. He is best known as Chief Information Officer of Grindhouse Wetware, a biotechnology startup company that creates technology to augment human capabilities. Grindhouse was co-founded by Cannon and Shawn Sarver in 2012. Cannon himself has had a variety of body modification implants, and has been referred to in the media as a cyborg.
Grindhouse Wetware is an open source biotechnology startup company based in Pittsburgh, Pennsylvania. Grindhouse applies the biohacker ethic to create technology that augments human capabilities. The company is most well known for their Circadia device, a wireless biometric sensor that was implanted into co-founder Tim Cannon on the 22 October 2013. Grindhouse has been featured in television shows such as Taboo on National Geographic Channel, Joe Rogan Questions Everything on Syfy, The Big Picture with Kal Penn, as well as podcasts including Future Grind and Roderick Russell's Remarkably Human.
Cyborg art, also known as cyborgism, is an art movement that began in the mid-2000s in Britain. It is based on the creation and addition of new senses to the body via cybernetic implants and the creation of art works through new senses. Cyborg artworks are created by cyborg artists; artists whose senses have been voluntarily enhanced through cybernetic implants. Among the early artists shaping the cyborg art movement are Neil Harbisson, whose antenna implant allows him to perceive ultraviolet and infrared colours, and Moon Ribas whose implants in her feet allow her to feel earthquakes and moonquakes. Other cyborg artists include:
