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Tridymite is a high-temperature polymorph of silica and occurs as minute tabular white or colorless pseudo-hexagonal crystals, or scales, in cavities in felsic volcanic rocks. Its chemical formula is SiO2. Tridymite was first described in 1868 and the type location is in Hidalgo, Mexico; the name is from the Greek tridymos for triplet as tridymite occurs as twinned crystal trillings. Tridymite can occur in seven crystalline forms. Two of the most common at standard pressure are known as α and β; the α-tridymite phase is favored at elevated temperatures and it converts to β-cristobalite at 1470 °C. However, tridymite does not form from pure β-quartz, one needs to add trace amounts of certain compounds to achieve this. Otherwise the β-quartz-tridymite transition is skipped and β-quartz transitions directly to cristobalite at 1050 °C without occurrence of the tridymite phase. In the table, M, O, H, C, P, L and S stand for monoclinic, hexagonal, primitive and superlattice. T indicates the temperature, at which the corresponding phase is stable, though the interconversions between phases are complex and sample dependent, all these forms can coexist at ambient conditions.

Mineralogy handbooks arbitrarily assign tridymite to the triclinic crystal system, yet use hexagonal Miller indices because of the hexagonal crystal shape. In December 2015, the team behind NASA's Mars Science Laboratory announced the discovery of large amounts of tridymite in Marias Pass on the slope of Aeolis Mons, popularly known as Mount Sharp, on the planet Mars; this discovery was unexpected given the rarity of the mineral on Earth and the apparent lack of volcanic activity where it was discovered, at the time of discovery no explanation for how it was formed was forthcoming. Its discovery was serendipitous: two teams, responsible for two different instruments on the Curiosity rover, both happened to report what in isolation were uninteresting findings related to their instruments: the ChemCam team reported a region of high silica while the DAN team reported high neutron readings in what turned out to be the same area. Neither team would have been aware of the other's findings had it not been for a fortuitous Mars conjunction in July 2015, during which the various international teams took advantage of the downtime to meet in Paris and discuss their scientific findings.

DAN's high neutron readings would have been interpreted as meaning the region was hydrogen-rich, ChemCam's high-silica readings were not surprising given the ubiquity of silica-rich deposits on Mars, but taken together it was clear that further study of the region was needed. Following conjunction, NASA directed the Curiosity rover back to the area where the readings had been taken and discovered that large amounts of tridymite were present. How they were formed remains a mystery. Cristobalite Coesite Stishovite Mineral galleries Standard pressure polymorphs of SiO2

Park Seong-ho (comedian)

Park Seong-ho is a veteran South Korean comedian. He has participated in many variety shows, he won two Top Excellence Awards at the KBS Entertainment Awards as well as the Grand Prize in Variety at the Baeksang Arts Awards for his work in Gag Concert. Park Seongho was born in South Korea, he graduated from Cheongju University with a bachelor's degree. He has a son named Park Jeong-bin and daughter, he is part of KBS' 13th class of comedians, passing the test in 1997 and debuting on Gag Concert in 2000, making him the comedian with the highest seniority on the show. He gained other segments on Gag Concert, he was a cast member for the first season of The Human Condition and the first sport on Cool Kiz On the Block. He appeared on the latter show's first anniversary episode, he was a professor at Seoul National University in 2007. Champion Mabbagi - the sportscaster Billy and the Brave Guys 3 - voice for 한국어, 목소리 SBS Power FM Kim Chang Ryul's Old School 2015 KBS Family Comedy Concert in Busan 아니므니다 벨보원 2013 Republic of Korea Culture and Entertainment Awards: Comedian Daesang 2010 Korea Broadcasting Awards Comedians Category: Appearance Award 2010 Baeksang Arts Awards: TV Entertainment: Best Variety Performer Award 2010 Korea PD Awards: Comedian Award 2009 KBS Entertainment Awards: Top Excellence Award 2004 KBS Entertainment Awards: Top Excellence Award 2001 Baeksang Arts Awards: Comedians Category: New Male Acting Award 1997 KBS New Male Comedian Acting Award 1994 Chungbuk National Art Exhibition KTB Securities LG U+ TV G Lotte Foods Color Power Mobilo Advertisement Model Netmarble Go!

Go! Go! Racer Park Seong-ho on Daum

Jack Whalen

Jack Whalen called Jack O'Hara and "The Enforcer," was a criminal and freelance contract killer and bookie, who worked for the Los Angeles crime family, although he was associated with Benjamin "Bugsy" Siegel, the Shannon brothers and Mickey Cohen during the 1940s and 1950s. Jack F. Whalen was born on May 1918 in Missouri. Whalen's father Fred—who was a career criminal—had enrolled Jack in military school to give his son a better life. Jack played polo in school and piloted bombers in World War II. After the war, he married into a rich family in Los Angeles, he was soon called "The Enforcer" because he was "so tough he didn't need a gun." On December 2, 1959, Whalen was shot "square between the eyes" and killed at Rondelli's restaurant in Sherman Oaks in the presence of Mickey Cohen and three other of his associates. Sam Frank LoCigno, although claiming self-defense, was charged with, but acquitted of, the murder. Whalen was 41 years old at the time of his death. Whalen is depicted in the 2013 film Gangster Squad by actor Sullivan Stapleton.

Whalen is a featured character in James Ellroy's novel L. A. Confidential. "Jack Whalen". Find a Grave. Retrieved June 24, 2013

Aptitude (software)

Aptitude is a front-end to APT, the Debian package manager. It displays a list of software packages and allows the user to interactively pick packages to install or remove, it has an powerful search system utilizing flexible search patterns. It was created for Debian, but has appeared in RPM Package Manager based distributions as well. Aptitude is based on the ncurses computer terminal library, with which it provides an interface that incorporates some elements seen in graphical user interfaces. In addition to the ncurses interface, aptitude provides an extensive command-line interface. Though aptitude is one executable file, it provides command-line functions similar to those of apt- family of tools. Aptitude emulates most apt-get command-line arguments, allowing it to act as a full replacement for apt-get. In the past, it was recommended that apt-get not be used interchangeably; this is no longer true, as both programs now track and share a common list of packages that were automatically installed to satisfy dependencies.

Aptitude was created in 1999. At the time two other terminal-based APT-like front-ends were available: the dselect program, used to manage packages on Debian since before APT was created, the console-apt program, a project, considered to be the heir apparent to dselect. Aptitude was created to experiment with a more object-oriented programming design than that used in console-apt, in the hope that this would result in a more flexible program with a broader set of features; the first public release of aptitude was version 0.0.1 on November 18, 1999. It was limited: it had the ability to view the list of available packages, but could not download or install any packages. By version 0.0.4a, this ability had been added, with many other improvements. In late 2000, the whole user interface module was rewritten; this enabled the interface to become much more similar to GUIs than it had been with features such as pull-down menus and pop-up dialogs. One of aptitude's more unusual features, a tiny implementation of Minesweeper, was added at this time.

The first official aptitude release following this rewrite was 0.2.0. Aptitude was released with Debian 3.0 Woody. By this time, the console-apt project had been abandoned by its maintainers, it was removed from Woody. Aptitude has been ported to jailbroken iOS as part of the Cydia package manager. Aptitude states that, unlike Advanced Packaging Tool, it "does not have Super Cow Powers". In apt-get "super cow powers" can be found by issuing the command apt-get moo. However, in aptitude issuing moo will give the user a prompt saying. However, by issuing aptitude -v moo aptitude -vv moo, so on the user will see a series of statements denying the "Super Cow Powers" or telling them to go away, some ending with a picture not unlike the original apt-get Easter egg. Different versions of the program have different sequences. In addition, the package description states that "aptitude is Y2K-compliant, non-fattening cleansing, housebroken." AppStream Kpackage Synaptic Package management Official website

Law of obligations (Bulgaria)

In Bulgaria, the law of obligations is set out by the Obligations and Contracts Act. According to art. 20a OCA contracts shall have the force of a law for the parties. Template:"Hello World!" In Bulgaria the contract is one of the prerequisites for the development of obligatory relations. The term contract refers to a bilateral legal transaction, which consists of two declarations of intent hat must be linked to each other and match in their contents. A contract is considered concluded from the moment; the parties conclude the contract, because they have as their object the occurrence of certain legal consequences. In accordance with art. 9 OCA. the parties may determine the content of the contract insofar as it does not contravene the mandatory provisions of the law and good morals. In Bulgaria, the separation principle and the abstraction principle do not apply. In contracts for the transfer of ownership to generically certain things, ownership passes when the goods are determined by agreement between the parties and in the absence of such agreements - at handover.

As for ownership transfer contracts and contracts of establishing or transferring some other property right over a specific chattel, the transfer or the establishment shall occur by virtue of the contract itself and shall not require that the chattel be delivered.. The OCA provides that contracts of ownership transfer and those of establishing other property rights on immovable property must be executed through a notarial deed. Contracts that violate legal requirements or show other legal deficits are invalid. Regarding invalid contracts, there are two subgroups to distinguish: void contracts and voidable contracts. Voidable contracts are contract that are valid and binding unless avoided or declared void by a party to them on the grounds prescribed by the law. General legal provisions regarding these grounds are provided in the Bulgarian Obligations and Contracts Act. Invalidation may be claimed only by the party in. A contract subject to invalidation may be ratified by the party entitled to demand its invalidation, by way of an instrument in writing which should indicate the grounds for invalidation.

A contract shall be ratified where the party entitled to demand its invalidation voluntarily performs it, in whole or in part, being aware of the grounds for invalidation. A contract, subject to invalidation on grounds of extreme necessity may not be ratified. According to art. 27 OCA a contract may be subject to invalidation of the following grounds: Legal incapacity – if a contract is concluded by incapable persons or by their representatives not respecting the specific legal provisions for representation. If the contract has been concluded with regard to a specific person being one of the parties to it a mistake concerning this person may render the contract void. Fraud - According to Article 29 of the Act, a fraud may cause the cancellation of the contract under the condition that one party has been deceived maliciously to enter into the contractual relationship. If the fraud has been induced by a third party, the deceived party may request the cancellation of the contract if the other party knew or ought to have known of the fraud.

A contract may be cancelled if one of the contracting parties concluded the contract out of reasonable fear induced by threats from the other party or third person. Incapacity to comprehend one's own actions - If a person capable of acting is enabled to comprehend his own actions while concluding a contract, the contract may be cancelled. Stringent necessity - The contract is voidable as well if it has been concluded under stringent necessity and under unfavorable conditions for one of the parties; the court may cancel the contract or in the future. If the other party offers to compensate the damages, the contract may remain in force. According to the concept of void contracts used by the Bulgarian lawmakers these contracts should be regarded as if they had never been concluded; the void contracts are those which have no legal effect because of their defectiveness from their conclusion and where a conformation is not possible. Contracts contravening or circumventing the law, as well as contracts infringing good morals, including contracts on inheritance that does not exist as yet, shall be null and void.

Null and void shall be those contracts that have an impossible subject, as well as the contracts which lack either consent or a form prescribed by law, or grounds. Fictitious contracts are null and void; the grounds shall be presumed to exist. The invalidity of few clauses does not render the entire contract void given that the clauses may be replaced by binding prescriptions of the law or if the transaction is supposed to have been concluded without the void clauses. If the contract is declared invalid, each party must pay back what he has received from the other party. If an invalid contract complies with the requirements of another legal transaction, the former is valid and considered transformed in the latter given that the parties would have agreed to conclude the latter; the representation is governed by art. 36-43 OCA. The Representation is a legal institution referring to legal actions of one person on behalf of another whereby the principal has to bear the consequences resulting from the agent's legal actions.

Here are two forms of repres

Eric Verhagen

Eric Verhagen is a retired Dutch sidecarcross passenger and double World Champion. He has won the Dutch national sidecarcross championship four times, in 1986, 1989, 1990 and 1992. All his successes were achieved with Eimbert Timmermans as the team's driver. Eric Verhagen's first success as a sidecarcross rider came in 1986, when he took out the Dutch national championship, together with Eimbert Timmermans; this season was his first in the sidecarcross world championship, where the team finished sixteen's, with two seventh place race finishes as their best results. After similar results in 1987, the team improved in 1988, coming fifth in the world championship and taking out their first race win in the Dutch GP. After continuing good results in 1989 and 1990 and two more Dutch national championships, the team managed to take out their first world championship in 1991; the following season, 1992, saw a repeat of the world championship and a fourth Dutch title. Verhagen retired from the competition after that.

Source:"The John Davey Pages - Eric Verhagen". John Davey. Retrieved 2009-11-01. Champions: 1991, 1992 Champions: 1986, 1989, 1990, 1992 The World Championship on