Apertura vol. 17, núm. 2, octubre 2025 - marzo 2026, es una revista científica especializada en innovación educativa en ambientes virtuales que se publica de manera semestral por la Universidad de Guadalajara, a través de la Coordinación de Recursos Informativos del Sistema de Universidad Virtual. Oficinas en Av. La Paz 2453, colonia Arcos Sur, CP 44140, Guadalajara, Jalisco, México. Tel.: 3268-8888, ext. 18775, www.udgvirtual.udg.mx/apertura, apertura@udgvirtual.udg.mx. Editor responsable: Dr. Rafael Morales Gamboa. Número de la Reserva de Derechos al Uso Exclusivo del Título de la versión electrónica: 04-2009-080712102200-203, e-ISSN: 2007-1094; número de la Reserva de Derechos al Uso Exclusivo del Título de la versión impresa: 04-2009-121512273300-102, ISSN: 1665-6180, otorgados por el Instituto Nacional del Derecho de Autor. Número de Licitud de Título: 13449 y número de Licitud de contenido: 11022 de la versión impresa, ambos otorgados por la Comisión Calificadora de Publicaciones y Revistas Ilustradas de la Secretaría de Gobernación. Responsable de la última actualización de este número: Sergio Alberto Mendoza Hernández. Fecha de última actualización: 30 de septiembre de 2025.
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Why What Is Billiards Succeeds
















Why What Is Billiards Succeeds
por Justin Firkins (2024-09-16)
A training film for projectionists included footage of a controlled ignition of a reel of nitrate film, which continued to burn even when fully submerged in water. Even after film technology changed, archives of older films remained vulnerable; the 1965 MGM vault fire burned many films that were decades old. Even on the occasions when nitrate stock did not start a devastating blaze, once flames from other sources spread to large nearby film collections, the resulting combustion greatly intensified the fires and substantially increased the scope of their damage. For this reason, immersing burning film in water may not extinguish it, and could actually increase the amount of smoke produced. The amount of power you put into a shot on a slate table seems to make the ball go further than the same amount on a wood table. There are three parameters which you can remember to make this system less complex for you. The cushions are the most susceptible, as they can harden when exposed to heat or cold for long periods.
While guncotton is dangerous to store, the hazards it presents can be minimized by storing it dampened with various liquids, such as alcohol. Advanced variants of association croquet give further penalties to dissuade skilled players from running every hoop with a ball on a single break, while handicap versions give weaker players chances to continue play after making an error. When the cue ball curves during travel due to spin, force, and cue impact. The cue ball will usually be a solid white, so it’s easy to identify it on the table. There are 7 red balls, 7 yellow balls, and a black 8-ball. No other ball is numbered besides the 8-ball. British style billiard balls are also noticeably smaller than standard American pool balls. There are also clubs in many universities and colleges, with an annual Varsity match being played between Oxford and Cambridge. For most of the game, these actions are considered standard fouls and result in ball-in-hand for the opponent either on the entire table or behind the head string. That player is assigned the group, or suit, of the pocketed ball - 1 to 7 (solids) or 9 to 15 (stripes) - and the other suit is assigned to the opponent.
The consequence is the immediate forfeiture of the game in favor of your opponent. From, this the game was then linked to poolrooms and gamblers. Later that same month, many more reels and film cans of negatives and prints also burned at Edison Studios in New York City, in the Bronx; then again, on May 13, a fire at Universal Pictures' Colonial Hall "film factory" in Manhattan consumed another extensive collection. This Film is Dangerous: A Celebration of Nitrate Film. Today, the Dryden Theatre at the George Eastman Museum is one of a few theaters in the world that is capable of safely projecting nitrate films and regularly screens them to the public. In the meantime, George Eastman had already started production of roll-film using his own process. Goodwin's patent was sold to Ansco, which successfully sued Eastman Kodak for infringement of the patent and was awarded $5,000,000 in 1914 to Goodwin Film. This was used commercially as "celluloid", a highly flammable plastic that until the mid-20th century formed the basis for lacquers and photographic film. Disastrous fires related to celluloid or "nitrate film" became regular occurrences in the motion picture industry throughout the silent era and for many years after the arrival of sound film.
The use of volatile nitrocellulose film for motion pictures led many cinemas to fireproof their projection rooms with wall coverings made of asbestos. Those additions intended to prevent or at least delay the migration of flames beyond the projection areas. It does not need to illuminate the surrounding areas. In general, however, brighter colors do better with less light, darker colors need a little more to help visibility, and colors like green, blue, and tan tend to look good in just about any lighting. Glycine and chloride ions make protein transfer more efficient. As a medium for cryptographic one-time pads, they make the disposal of the pad complete, secure, and efficient. In 1855, the first human-made plastic, nitrocellulose (branded Parkesine, patented in 1862), was created by Alexander Parkes from cellulose treated with nitric acid and a solvent. Guncotton was originally made from cotton (as the source of cellulose) but contemporary methods use highly processed cellulose from wood pulp. In 1832 Henri Braconnot discovered that nitric acid, when combined with starch or wood fibers, would produce a lightweight combustible explosive material, which he named xyloïdine. This in turn tends to produce bad software development habits. Jules Verne viewed the development of guncotton with optimism.
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