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High-temperature superconductivity

High-temperature superconductors are operatively defined as materials that behave as superconductors at temperatures above nearly -200 °C. This is in fact the lowest temperature reachable by liquid nitrogen, one of the simplest coolant in cryogenics. All superconducting materials known at ordinary pressures work far below ambient temperatures and therefore require cooling; the majority of high-temperature superconductors are ceramics materials. On the other hand, Metallic superconductors work below -200 °C: they are called low-temperature superconductors. Metallic superconductors are ordinary superconductors, since they were discovered and used before the high-temperature ones. Ceramic superconductors are now becoming suitable for some practical use, but they still have many manufacturing issues and there are few successful practical examples of employment. Most ceramics are brittle which makes the fabrication of wires from them problematic; the major advantage of high-temperature ceramic superconductors is that they can be cooled by using liquid nitrogen.

On the other hand, metallic superconductors require more difficult coolants - liquid helium. None of high-temperature superconductors are coolable using only dry ice, none of them works at room temperature and pressure. All high-temperature superconductors require some kind of cooling systems; the main class of high-temperature superconductors are in the class of copper oxides. The second class of high-temperature superconductors in the practical classification is the class of iron-based compounds. Magnesium diboride is sometimes included in high-temperature superconductors: it is simple to manufacture, but it superconducts only below -230 °C, which makes it unsuitable for liquid nitrogen cooling. For example, it can be cooled with liquid helium. Many ceramic superconductors physically behave as superconductors of the second type; the first high temperature superconductor was discovered in 1986, by IBM researchers Bednorz and Müller, who were awarded the Nobel Prize in Physics in 1987 "for their important break-through in the discovery of superconductivity in ceramic materials".

Some extremely-high pressure gases are categorized as high-temperature superconductors by theoretical physicists. In fact, many articles on high-temperature superconductors can be found on this theoretical research on high pressure gases, not suitable for practical applications but only for the theoretical mathematical explanation of the superconductivity phenomenon. Superconductivity was discovered in a metal solid. Since, researchers have attempted to observe superconductivity at increasing temperatures with the goal of finding a room-temperature superconductor. By the late 1970s, superconductivity was observed in several metallic compounds at temperatures that were much higher than those for elemental metals and which could exceed 20 K. In 1986, at the IBM research lab near Zurich, in Switzerland, Bednorz and Müller were looking for superconductivity in a new class of ceramics: the copper oxides, or cuprates. Bednorz encountered a particular copper oxide whose resistance dropped to zero at a temperature around −238 °C.

Their results were soon confirmed by many groups, notably Paul Chu at the University of Houston and Shoji Tanaka at the University of Tokyo. Shortly after, at Princeton University, Anderson gave the first theoretical description of these materials, based on the resonating valence bond theory, but a full understanding of these materials is still developing today; these superconductors are now known to possess a d-wave pair symmetry. The first proposal that high-temperature cuprate superconductivity involves d-wave pairing was made in 1987 by Bickers and Scalettar, followed by three subsequent theories in 1988 by Inui, Doniach and Ruckenstein, using spin-fluctuation theory, by Gros, Poilblanc and Zhang, by Kotliar and Liu identifying d-wave pairing as a natural consequence of the RVB theory; the confirmation of the d-wave nature of the cuprate superconductors was made by a variety of experiments, including the direct observation of the d-wave nodes in the excitation spectrum through Angle Resolved Photoemission Spectroscopy, the observation of a half-integer flux in tunneling experiments, indirectly from the temperature dependence of the penetration depth, specific heat and thermal conductivity.

The superconductor with the highest transition temperature is the cuprate of mercury and calcium, at around 133 K. The origin of high-temperature superconductivity is still not clear, but it seems that instead of electron-phonon attraction mechanisms, as in conventional superconductivity, one is dealing with genuine electronic mechanisms, instead of conventional, purely s-wave pairing, more exotic pairing symmetries are thought to be involved. In 2014, evidence showing that fractional particles can happen in quasi two-dimensional magnetic materials, was found by EPFL scientists lending support for Anderson's theory of high-temperature superconductivity; the "High-temperature" superconductor class has had many definitions in the context of superconductivity. The label high-Tc should be reserved for materials with critical temperatures greater than the boiling point of liquid nitrogen. Ho

La Falda

La Falda is a town in the province of Córdoba, located 79 km from Córdoba and 800 km from Buenos Aires. It had about 15,000 inhabitants at the 2001 census. La Falda lies at the foot of two small mountains, it is part of an important tourist circuit of the province; the Punilla Department includes other tourist sites like Villa Carlos Paz, Los Cocos, La Cumbre and Capilla del Monte. La Falda is home to the historic "Eden Hotel", visited by Albert Einstein. Adolf Hitler was rumored to have stayed here in 1948; the main street and hub of activity for the town is "Avenue Eden". Attractions in La Falda include the 7 Cascades, a natural park which hosts a large public swimming pool. "El Silenco" is a colonial castle of the 17th century featuring observation of trout. "Tatu Carreta" is an Ecological Zoo c. 8 km from the downtown on the route toward Córdoba. It is a drive thru "safari" style zoological experience with exotic animal species; the area has been used as a special stage for Rally Argentina. List of world's largest cuckoo clocks Official website Municipal information: Municipal Affairs Federal Institute, Municipal Affairs Secretariat, Ministry of Interior, Argentina.

All About La Falda Villa Carlos Paz and Valle de Punilla Ecological Park & Zoo La Falda Tango Festival Information

Hank Baskett

Henry Randall Baskett III is a former American football wide receiver who played in the National Football League for the Minnesota Vikings, Philadelphia Eagles and Indianapolis Colts. A native of Clovis, New Mexico, Baskett played college football for the University of New Mexico; as a college football player, Baskett was a leading wide receiver and earned all-academic honors all his years at New Mexico and All-Mountain West Conference honors in his senior season. In 2006, Baskett signed with the Minnesota Vikings as a rookie undrafted free agent and was traded that season to the Philadelphia Eagles. Baskett completed his rookie season with the Eagles with 22 receptions for an average of 20.1 yards per catch and two touchdowns. In 2009, Baskett joined the Indianapolis Colts, he was released and signed with the Vikings. Baskett married Playboy model Kendra Wilkinson in 2009. Wilkinson and Baskett were co-stars on Kendra, a reality TV series following Wilkinson's life from 2009 to 2011, they subsequently co-starred on WEtv’s Kendra on Top from 2012 until 2017.

Baskett was born in New Mexico. Baskett's parents are Henry Randall "Hank" Baskett, Jr. who worked for the Air Force before becoming director of a social service program, Judy Baskett, who works as a financial officer at Cannon Air Force Base in Clovis. He attended Clovis High School; when Baskett attended the University of New Mexico, he was its football team's leading receiver in 2004 and 2005, earning him the Reese Leroy Hill Memorial Award as the team's Offensive Player of the Year during those years. Additionally, he earned All-Mountain West Conference honors as a senior, posting 67 receptions for 1,071 yards and nine touchdowns. A four-time all-academic MWC honoree, he graduated with a degree in General Management. Baskett signed with the Minnesota Vikings as a rookie undrafted free agent in 2006 and was traded to the Philadelphia Eagles in exchange for wide receiver Billy McMullen. Baskett had 112 receiving yards and one touchdown against the Dallas Cowboys and 177 receiving yards and one touchdown against the Atlanta Falcons.

For his performance in these games, Baskett was awarded rookie of the week honors. He completed his rookie season with 22 receptions for two touchdowns, he was named the 2007 special teams Most Valuable Player. In 2008, he started another six games, playing in 16 to record 33 receptions, 440 yards, three touchdowns for a 13.3-yard average. He headed into the 2009 offseason as a restricted free agent, he was tendered a one-year contract on February 23. Because the Eagles had been carrying seven wide receivers, he was made expendable and released on September 15, 2009, to make room for Michael Vick on the 53-man roster. On September 17, 2009, Baskett signed a one-year contract with the Indianapolis Colts after Anthony Gonzalez suffered a knee injury. On February 7, 2010, during Super Bowl XLIV versus the New Orleans Saints, Baskett failed to recover an onside kick at the start of the second half, which led to a Saints touchdown. New Orleans won the game, 31–17; the next day, February 8, 2010, Baskett was released by the Colts.

On March 12, 2010, Baskett signed a one-year contract with the Philadelphia Eagles for $800,000. He was released on September 21, 2010. On September 22, 2010, Baskett re-signed with the Minnesota Vikings, he played in eight games in 2010 on special teams, with one reception. On March 3, 2011, he was not extended a tender by the Vikings, making him an unrestricted free agent, but ending his NFL career. Source: Baskett co-stars in a spinoff of The Girls Next Door, titled Kendra, which focuses on his wife Kendra Wilkinson's life after leaving the Playboy Mansion; the Girls Next Door executive producer Kevin Burns serves in the same capacity on the series. The show premiered on June 7, 2009, had record-breaking numbers for E! with 2.6 million viewers, the highest-rated reality debut for the network since 2002's premiere of The Anna Nicole Show. E! ordered eight episodes. Season 2 ran from March 14 until June 8, 2010; the show was renewed once more, the third season began airing in November 2010. The fourth season of the show premiered September 2011.

The show has ended its run on E! and has now become Kendra on Top which began airing on WE tv on Tuesday, June 5, 2012. Season 2 ran from September to November 2013 and season 3 ran from October to November 2014. Baskett proposed to his girlfriend, Playboy model Kendra Wilkinson, on top of the Space Needle after six months of knowing each other, they married on June 2009, at the Playboy Mansion. The couple have a son together, Henry Randall "Hank" Baskett live in Los Angeles. In October 2013, the couple announced. Kendra gave birth to a baby girl who they named Alijah Mary Baskett on May 16, 2014. On April 3, 2018, Kendra filed to divorce Baskett. Baskett has been a resident of New Jersey. In the novel, The Silver Linings Playbook by Matthew Quick, central character Pat Peoples was given Baskett's Philadelphia Eagles number 84 jersey as a present. Over the 2006-07 season, Baskett became Peoples's favorite player and, for Christmas, he received an autographed picture of Baskett. Article on Philadelphia Eagles website Indianapolis Colts bio Minnesota Vikings bio

Gun laws in Tennessee

Gun laws in Tennessee regulate the sale and use of firearms and ammunition in the state of Tennessee in the United States. Places off-limits with a Handgun Carry Permit Tennessee State Constitution, Article I, Section 26, reads: That the citizens of this state have a right to keep and to bear arms for their common defense. State supreme court rulings and state attorney general opinions interpret Section 26 to mean regulation cannot and should not interfere with the common lawful uses of firearms, including defense of the home and hunting, but should only be aimed at criminal behavior. Andrews v. State and Glasscock v. Chattanooga defined the meaning of regulating arms. "Going armed", carrying any sort of weapon for offense or defense in public, is a crime, except carrying a handgun for defense is allowed with a state-issued permit. A license is required to carry a loaded handgun either or concealed; such permits are issued through the Department of Safety to qualified residents 21 years or 18 years old if the applicant is active duty, guardsman, or honorably discharged from their branch of service, DD-214 must mention'pistol qualification' in order to be exempt from 8 hour safety course must have a valid military ID.

The length of the term for the initial license is determined by the age of the applicant. If renewed properly and on time, the license is renewed every 8 years. Tennessee recognizes any valid, out-of-state permit for carrying a handgun as long as the permittee is not a resident of Tennessee. Nonresidents are not issued permits unless they are employed in the state; such persons are required to obtain Tennessee permits if they have home state permits unless their home state has entered into a reciprocity agreement with Tennessee. Permittees may carry handguns in most areas except civic centers, public recreation buildings and colleges. Businesses or landowners posting "no carry" signs may prohibit gun carry on any portion of their properties. Tennessee requires a permit to carry a firearm, whether or concealed. Additionally, per Tenn. Code Ann. 39-17-1351 r. a facially valid handgun permit, firearms permit, weapons permit or license issued by another state shall be valid in this state according to its terms and shall be treated as if it is a handgun permit issued by this state ).

A person possessing a firearm or ammunition in a motor vehicle, not otherwise prohibited from owning a firearm and is in lawful possession of the motor vehicle is not in violation of the open carry law in Tennessee as long as the firearm is not carried on one's person. Except for four specific exceptions, Tennessee's preemption statute prevents localities from enacting any new laws regulating the use, transfer, manufacture, possession, sale, gift, licensing, registration and transportation of firearms and ammunition; the current statute preempts any existing local law, ordinance or regulation concerning firearms, ammunition or their components. The exceptions allow localities to regulate 1) the carrying of firearms by their employees when acting in the course of the employees employment. Most aspects of licensed handgun carry are regulated by the state. At one time, Tennessee required a purchase permit for a handgun approved by one's city police chief or county sheriff with a fifteen-day waiting period.

Handguns in Tennessee are defined as having a barrel length of less than twelve inches per T. C. A. § 39-11-106. Some counties have adopted Second Amendment sanctuary resolutions

National Register of Historic Places listings in Fayette County, Texas

This is a list of the National Register of Historic Places listings in Fayette County, Texas. This is intended to be a complete list of properties and districts listed on the National Register of Historic Places in Fayette County, Texas. There are 19 individual properties listed on the National Register in the county; the individually listed properties include one State Historic Site, five State Antiquities Landmarks, seven Recorded Texas Historic Landmarks. Three districts together include numerous additional Recorded Texas Historic Landmarks. Three properties were listed on the National Register including one that has since been relisted after relocation; this National Park Service list is complete through NPS recent listings posted February 28, 2020. The locations of National Register properties and districts may be seen in a mapping service provided. National Register of Historic Places listings in Texas List of Texas State Historic Sites Recorded Texas Historic Landmarks in Fayette County Media related to National Register of Historic Places in Fayette County, Texas at Wikimedia Commons

Mico Halili

Mico Halili is a Filipino sports television personality and sports journalist. He is best known as the lead sportscaster for the basketball games of the UAAP. In March 2018, he became the head of digital media at ABS-CBN Sports, while continuing as lead anchor in UAAP and NCAA basketball games for ABS-CBN Sports. Halili began his career in 1998 with ABS-CBN Sports as one of the play-by-play commentators for the Metropolitan Basketball Association games, he became a commentator for the basketball games of the UAAP and the NCAA. In 2003, he became a play-by-play commentator for the PBA games when it was broadcast on NBN/IBC, he became the lead anchor between 2004 and 2015. Halili co-created and hosted the original Halikinu Radio program on NU 107, he returned to ABS-CBN Sports on March 2015 as the lead anchor for the UAAP basketball games. He anchored CNN Philippines Sports Desk from March 2015 to December 2017. Halili hosted web-exclusive shows such as FTW for GMA News Online and The Bro Show with Richard del Rosario and Jason Webb.

He was editor-at-large of SLAM! Philippines magazine. Halili was educated at the Ateneo de Manila and completed his Bachelor of Arts, major in Communication from the same university in 1995, he is married to GMA News reporter and anchor Pia Arcangel since 2004