Crystal Catherine Eastman was an American lawyer, antimilitarist, feminist, socialist, and journalist. She is best remembered as a leader in the fight for women's suffrage, as a co-founder and co-editor with her brother Max Eastman of the radical arts and politics magazine The Liberator, co-founder of the Women's International League for Peace and Freedom, and co-founder in 1920 of the American Civil Liberties Union. In 2000 she was inducted into the National Women's Hall of Fame in Seneca Falls, New York.
In the mathematical field of geometric topology, the Poincaré conjecture is a theorem about the characterization of the 3-sphere, which is the hypersphere that bounds the unit ball in four-dimensional space.
Tourmaline is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is a gemstone and can be found in a wide variety of colors.
Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives.
Spelljammer is a campaign setting originally published for the Advanced Dungeons & Dragons role-playing game, which features a fantastic outer space environment. Subsequent editions have included Spelljammer content; a Dungeons & Dragons 5th edition setting update released on August 16, 2022.
The atomic radius of a chemical element is a measure of the size of its atom, usually the mean or typical distance from the center of the nucleus to the outermost isolated electron. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius. Four widely used definitions of atomic radius are: Van der Waals radius, ionic radius, metallic radius and covalent radius. Typically, because of the difficulty to isolate atoms in order to measure their radii separately, atomic radius is measured in a chemically bonded state; however theoretical calculations are simpler when considering atoms in isolation. The dependencies on environment, probe, and state lead to a multiplicity of definitions.
Crystal-gazing is a method for seeing visions achieved through trance induction by means of gazing at a crystal. Traditionally, it has been seen as a form of divination or scrying, with visions of the future, something divine etc., though research into the content of crystal-visions suggest the visions are related to the expectations and thoughts of the seer.
Contact juggling is a form of object manipulation that focuses on the movement of objects such as balls in contact with the body. Although often used in conjunction with "toss juggling", it differs in that it involves the rolling of one or more objects without releasing them into the air.
The Crystal Method is an American electronic music act formed in Las Vegas, Nevada, by Ken Jordan and Scott Kirkland in the early 1990s. They were pioneers of the big beat genre and their music has appeared in numerous TV shows, films, video games, and advertisements. Their 1997 debut studio album Vegas was certified platinum in 2007, and saw follow-ups Tweekend, Legion of Boom, Divided by Night, and The Crystal Method. In 2017, Ken Jordan retired from music and left the group, with Scott Kirkland adopting The Crystal Method as a solo moniker.
A photonic crystal is an optical nanostructure in which the refractive index changes periodically. This affects the propagation of light in the same way that the structure of natural crystals gives rise to X-ray diffraction and that the atomic lattices of semiconductors affect their conductivity of electrons. Photonic crystals occur in nature in the form of structural coloration and animal reflectors, and, as artificially produced, promise to be useful in a range of applications.
In geometry, a sphere packing is an arrangement of non-overlapping spheres within a containing space. The spheres considered are usually all of identical size, and the space is usually three-dimensional Euclidean space. However, sphere packing problems can be generalised to consider unequal spheres, spaces of other dimensions or to non-Euclidean spaces such as hyperbolic space.
Sir Nevill Francis Mott was a British physicist who won the Nobel Prize for Physics in 1977 for his work on the electronic structure of magnetic and disordered systems, especially amorphous semiconductors. The award was shared with Philip W. Anderson and J. H. Van Vleck. The three had conducted loosely related research. Mott and Anderson clarified the reasons why magnetic or amorphous materials can sometimes be metallic and sometimes insulating.
An op-ed piece, short for "opposite the editorial page," derives its name from originally having appeared physically opposite of the editorial page in a newspaper. Today, the term is used more widely to represent a column that represents the strong, informed, and focused opinion of the writer on an issue of relevance to a targeted audience. It is a written prose piece which expresses the opinion of an author or entity with no affiliation with the publication's editorial board.
A crystal ball, also known as an orbuculum or crystal sphere, is a crystal or glass ball and common fortune-telling object. It is generally associated with the performance of clairvoyance and scrying in particular.
Kriyananda was an American Hindu religious leader, yoga guru, meditation teacher, musician, and author. He was a direct disciple of Paramahansa Yogananda, and founder of the spiritual movement named "Ananda". He authored over 150 books, and composed about 400 piece of music. In 1998, he was found guilty of "constructive fraud", with a finding of "malice" and "fraudulent conduct" in a sexual harassment lawsuit.
Adventure Thru Inner Space was an attraction in Disneyland's Tomorrowland, presented by Monsanto Company. It was the first attraction to utilize Disney's Omnimover system. The ride simulated shrinking guests to the size smaller than an atom before taking a tour of snowflakes at molecular and atomic levels.
In thermodynamics, nucleation is the first step in the formation of either a new thermodynamic phase or structure via self-assembly or self-organization within a substance or mixture. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled below 0 °C, it will tend to freeze into ice, but volumes of water cooled only a few degrees below 0 °C often stay completely free of ice for long periods (supercooling). At these conditions, nucleation of ice is either slow or does not occur at all. However, at lower temperatures nucleation is fast, and ice crystals appear after little or no delay.
A pole figure is a graphical representation of the orientation of objects in space. For example, pole figures in the form of stereographic projections are used to represent the orientation distribution of crystallographic lattice planes in crystallography and texture analysis in materials science.
Sphere Books is the name of two British paperback publishers.
The southern celestial hemisphere, also called the Southern Sky, is the southern half of the celestial sphere; that is, it lies south of the celestial equator. This arbitrary sphere, on which seemingly fixed stars form constellations, appears to rotate westward around a polar axis due to Earth's rotation.
