Doba is a city in south-western Ivory Coast. It is a sub-prefecture of San-Pédro Department in San-Pédro Region, Bas-Sassandra District. A large northwest portion of the sub-prefecture lies within Taï National Park. Doba was a commune until March 2012, when it became one of 1126 communes nationwide that were abolished.In 2014, the population of the sub-prefecture of Doba was 123,530

Dyakonov-Voigt wave (also known as Dyakonov–Voigt (DV) surface waves) is a distinctive type of light wave that results from a particular manipulation of crystals, discovered in 2019, but which were first suggested in equations developed by physicist James Clerk Maxwell in the middle 1800s.

Xi Jinping (; Chinese: 习近平; Mandarin pronunciation: [ɕǐ tɕîn.pʰǐŋ]; born 15 June 1953) is a Chinese politician serving as General Secretary of the Communist Party of China (CPC), President of the People's Republic of China (PRC), and Chairman of the Central Military Commission (CMC). Often described as China's "paramount leader" since 2012, he officially received the title of "core leader" from the CPC in 2016. As general secretary, Xi holds an ex-officio seat on the Politburo Standing Committee of the Communist Party of China, China's top decision-making body. Xi is the first general secretary born after the Second World War and the establishment of the People's Republic of China. The son of Chinese Communist veteran Xi Zhongxun, he was exiled to rural Yanchuan County as a teenager following his father's purge during the Cultural Revolution, and lived in a cave in the village of Liangjiahe, where he worked as the party secretary. After studying at the Tsinghua University as a "Worker-Peasant-Soldier student", Xi rose through the ranks politically in China's coastal provinces. Xi was governor of Fujian from 1999 to 2002, and governor, then party secretary of neighbouring Zhejiang from 2002 to 2007. Following the dismissal of the CPC Secretary of Shanghai Chen Liangyu, Xi was transferred to replace him for a brief period in 2007. He joined the Politburo Standing Committee and central secretariat in October 2007, spending the next five years as Chinese paramount leader Hu Jintao's presumed successor. Xi was vice president from 2008 to 2013 and vice chairman of the Central Military Commission from 2010 to 2012. Since assuming power, Xi has introduced far-ranging measures to enforce party discipline and to ensure internal unity. His signature anti-corruption campaign has led to the downfall of prominent incumbent and retired Communist Party officials, including members of the Politburo Standing Committee. Described as a Chinese nationalist, he has tightened restrictions over civil society and ideological discourse, advocating Internet censorship in China as the concept of "internet sovereignty". Xi has called for further socialist market economic reforms, for governing according to the law and for strengthening legal institutions, with an emphasis on individual and national aspirations under the slogan "Chinese Dream". He has also championed a more assertive foreign policy, particularly with regard to China–Japan relations, China's claims in the South China Sea, and its role as a leading advocate of free trade and globalization. Xi has sought to expand China's African and Eurasian influence through the Belt and Road Initiative. Considered the central figure of the fifth generation of leadership of the People's Republic, Xi has significantly centralised institutional power by taking on a wide range of leadership positions, including chairing the newly formed National Security Commission, as well as new steering committees on economic and social reforms, military restructuring and modernization, and the Internet. Said to be one of the most powerful leaders in modern Chinese history, Xi's political thoughts have been written into the party and state constitutions, and under his leadership the latter was amended to abolish term limits for the presidency. Due to his accumulation of more power than anyone since Mao Zedong, the significant increase of censorship and mass surveillance, significant deterioration in human rights, the return to a cult of personality and the removal of term limits for the President in 2018 under his rule, Xi Jinping has been called a dictator by many political observers. However, Xi Jinping remains widely popular in China. A YouGov poll released in July 2019 found that 22% of Chinese people list Xi as the person they admire the most. In 2017, The Economist named him the most powerful person in the world. In 2018, Forbes ranked him as the most powerful and influential person in the world, replacing Russian President Vladimir Putin who had been so ranked for five consecutive years.

Sigma Phi Beta (ΣΦΒ) is a college fraternity for gay, straight, bisexual, and transgender men in college. It was founded at Arizona State University (ASU) on September 28, 2003. It originated as the beta chapter of a now-defunct fraternity with similar values, Alpha Lambda Tau.

Diary of a Wimpy Kid is a series of fiction books written by the American author and cartoonist Jeff Kinney. All the main books are the journals of the main character, Greg Heffley. Befitting a teen's diary, the books are filled with hand-written notes and simple drawings of Greg's daily adventures. Since the release of the online version in May 2004, most of the books have garnered positive reviews and commercial success. as of January 2019, more than 200 million copies have been sold globally. The first, second, fourth and ninth installments have been adapted into films by 20th Century Fox. The game Poptropica has released two islands themed after Diary of a Wimpy Kid, called Wimpy Wonderland and Wimpy Boardwalk. Diary of a Wimpy Kid officially began when Kinney brought up an idea about a middle-school weakling named Greg Heffley, who wrote about his personal life. In May 2004, FunBrain and Kinney released an online version of Diary of a Wimpy Kid. The website made daily entries until June 2005. He worked on his book for almost eight years, before showing it to a publisher in New York. In February 2006, during the New York Comic Con, Jeff signed a multi-book deal with publisher Harry N. Abrams, Inc., to turn Diary of a Wimpy Kid into a print series. The book became an instant hit, and the online version received about 20 million views as of 2009. Nonetheless, many online readers requested a printed version; Kinney agreed, and in April 2007, Diary of a Wimpy Kid was published. To date, thirteen Wimpy Kid books have been released, plus one do-it-yourself book, two movie diaries, and a spin-off. In April 2009, TIME named Kinney one of The World's Most Influential People.

Sigma Phi Beta (ΣΦΒ) is a college fraternity for gay, straight, bisexual, and transgender men in college. It was founded at Arizona State University (ASU) on September 28, 2003. It originated as the beta chapter of a now-defunct fraternity with similar values, Alpha Lambda Tau. It disaffiliated from Alpha Lambda Tau on May 11, 2003.According to its promoters, "The fraternity creates a unique social and educational environment for its members within the traditional Greek fraternity system, while providing all open-minded men in college with career and character building opportunities. By participating in recreational, scholastic, and community service programs, the members of Sigma Phi Beta are transforming into tomorrow's reliable leaders. Sigma Phi Beta values brotherhood, diversity, leadership, education, scholarship, fraternity life, and community service. We embrace tradition while promoting positive change that moves us forward."It organized as a national body on July 17, 2005, adopting a constitution and bylaws and electing the first fraternity council.

Xi Jinping (; Chinese: 习近平; Mandarin pronunciation: [ɕǐ tɕîn.pʰǐŋ]; born 15 June 1953) is a Chinese politician serving as General Secretary of the Communist Party of China (CPC), President of the People's Republic of China (PRC), and Chairman of the Central Military Commission (CMC). Often described as China's "paramount leader" since 2012, he officially received the title of "core leader" from the CPC in 2016. As general secretary, Xi holds an ex-officio seat on the Politburo Standing Committee of the Communist Party of China, China's top decision-making body.

Compacted graphite iron (CGI), also known as vermicular graphite iron (GJV, VG, JV or GGV from the German: "Gusseisen mit Vermiculargraphit") especially in non-English speaking countries, is a metal which is gaining popularity in applications that require either greater strength, or lower weight than cast iron. R.D. Schelleng obtained a patent for the production of Compacted graphite iron in 1965.

Sigma Phi Beta