1.
Copper
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Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with high thermal and electrical conductivity. A freshly exposed surface of copper has a reddish-orange color. Copper is one of the few metals that occur in nature in directly usable metallic form as opposed to needing extraction from an ore and this led to very early human use, from c.8000 BC. Copper used in buildings, usually for roofing, oxidizes to form a green verdigris, Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as agents, fungicides, and wood preservatives. Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the enzyme complex cytochrome c oxidase. In molluscs and crustaceans, copper is a constituent of the blood pigment hemocyanin, replaced by the hemoglobin in fish. In humans, copper is found mainly in the liver, muscle, the adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. The filled d-shells in these elements contribute little to interatomic interactions, unlike metals with incomplete d-shells, metallic bonds in copper are lacking a covalent character and are relatively weak. This observation explains the low hardness and high ductility of single crystals of copper, at the macroscopic scale, introduction of extended defects to the crystal lattice, such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is supplied in a fine-grained polycrystalline form. The softness of copper partly explains its high conductivity and high thermal conductivity. The maximum permissible current density of copper in open air is approximately 3. 1×106 A/m2 of cross-sectional area, Copper is one of a few metallic elements with a natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air, as with other metals, if copper is put in contact with another metal, galvanic corrosion will occur. A green layer of verdigris can often be seen on old structures, such as the roofing of many older buildings. Copper tarnishes when exposed to sulfur compounds, with which it reacts to form various copper sulfides. There are 29 isotopes of copper, 63Cu and 65Cu are stable, with 63Cu comprising approximately 69% of naturally occurring copper, both have a spin of 3⁄2
2.
Equestrian statue
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An equestrian statue is a statue of a rider mounted on a horse, from the Latin eques, meaning knight, deriving from equus, meaning horse. A statue of a horse is strictly an equine statue. A full-sized equestrian statue is a difficult and expensive object for any culture to produce, Equestrian statuary in the West goes back at least as far as Archaic Greece. Found on the Athenian acropolis, the sixth century BC statue known as the Rampin Rider depicts a kouros mounted on horseback, a number of ancient Egyptian, Assyrian and Persian reliefs show mounted figures, usually rulers, though no free standing statues are known. The Chinese Terracotta Army has no mounted riders, though cavalrymen stand beside their mounts, the Regisole was a bronze classical or Late Antique equestrian monument of a ruler, highly influential during the Italian Renaissance but destroyed in 1796 in the wake of the French Revolution. It was originally erected at Ravenna, but removed to Pavia in the Middle Ages, a fragment of an equestrian portrait sculpture of Augustus has also survived. Equestrian statues were not very frequent in the Middle ages, nevertheless, there are some examples, like the Bamberg Horseman, located in Bamberg Cathedral. Another example is the Magdeburg Reiter, in the city of Magdeburg, there are a few roughly half-size statues of Saint George and the Dragon, including the famous ones in Prague and Stockholm. The Scaliger Tombs in Verona include Gothic statues at less than lifesize, a well-known small bronze in Paris may be a contemporary portrait of Charlemagne, although its date and subject are uncertain. Leonardo da Vinci had planned an equestrian monument to the Milanese ruler. The The Wax Horse and Rider is a model for an equestrian statue of Charles dAmboise. Titians equestrian portrait of Charles V, Holy Roman Emperor of 1548 applied the form again to a ruler, taccas studio would produce such models for the rulers in France and Spain. His last public commission was the equestrian bronze of Philip IV, begun in 1634. The near life-size equestrian statue of Charles I of England by Hubert Le Sueur of 1633 at Charing Cross in London is the earliest large English example, which was followed by many. The Bronze Horseman is an equestrian statue, on a huge base, of Peter the Great of 1782 by Étienne Maurice Falconet in Saint Petersburg. Mills was the first American sculptor to overcome the challenge of casting a rider on a rearing horse, the resulting sculpture was so popular he repeated it, for Washington, D. C. New Orleans, Louisiana and Nashville, Tennessee, cyrus Edwin Dallin made a specialty of equestrian sculptures of American Indians, his Appeal to the Great Spirit stands before the Museum of Fine Arts, Boston. The Robert Gould Shaw Monument in Boston, Massachusetts is a famous relief including an equestrian portrait, as the 20th century progressed, the popularity of the equestrian monument declined sharply, as monarchies fell, and the military use of horses virtually vanished
3.
Peter the Great
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Peter the Great, Peter I or Peter Alexeyevich ruled the Tsardom of Russia and later the Russian Empire from 7 May 1682 until his death, jointly ruling before 1696 with his elder half-brother, Ivan V. Through a number of successful wars he expanded the Tsardom into a larger empire that became a major European power. He led a revolution that replaced some of the traditionalist and medieval social and political systems with ones that were modern, scientific, westernized. Peters reforms made an impact on Russia and many institutions of Russian government trace their origins to his reign. From an early age, Peters education was put in the hands of tutors, most notably Nikita Zotov, Patrick Gordon. On 29 January 1676, Tsar Alexis died, leaving the sovereignty to Peters elder half-brother and this position changed when Feodor died in 1682. As Feodor did not leave any children, a dispute arose between the Miloslavsky family and Naryshkin family over who should inherit the throne, Peters other half-brother, Ivan V, was next in line for the throne, but he was chronically ill and of infirm mind. Consequently, the Boyar Duma chose the 10-year-old Peter to become Tsar with his mother as regent and this arrangement was brought before the people of Moscow, as ancient tradition demanded, and was ratified. Sophia Alekseyevna, one of Alexis daughters from his first marriage, in the subsequent conflict some of Peters relatives and friends were murdered, including Matveev, and Peter witnessed some of these acts of political violence. The Streltsy made it possible for Sophia, the Miloslavskys and their allies, to insist that Peter and Ivan be proclaimed joint Tsars, Sophia acted as regent during the minority of the sovereigns and exercised all power. For seven years, she ruled as an autocrat, a large hole was cut in the back of the dual-seated throne used by Ivan and Peter. Sophia would sit behind the throne and listen as Peter conversed with nobles, while feeding him information and giving him responses to questions and this throne can be seen in the Kremlin Armoury in Moscow. Peter was not particularly concerned that others ruled in his name and he engaged in such pastimes as shipbuilding and sailing, as well as mock battles with his toy army. Peters mother sought to force him to adopt a conventional approach. The marriage was a failure, and ten years later Peter forced his wife to become a nun, by the summer of 1689, Peter planned to take power from his half-sister Sophia, whose position had been weakened by two unsuccessful Crimean campaigns. When she learned of his designs, Sophia conspired with the leaders of the Streltsy, Sophia was eventually overthrown, with Peter I and Ivan V continuing to act as co-tsars. Peter forced Sophia to enter a convent, where she gave up her name, still, Peter could not acquire actual control over Russian affairs. Power was instead exercised by his mother, Natalya Naryshkina and it was only when Nataliya died in 1694 that Peter became an independent sovereign
4.
Russia
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Russia, also officially the Russian Federation, is a country in Eurasia. The European western part of the country is more populated and urbanised than the eastern. Russias capital Moscow is one of the largest cities in the world, other urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod. Extending across the entirety of Northern Asia and much of Eastern Europe, Russia spans eleven time zones and incorporates a range of environments. It shares maritime borders with Japan by the Sea of Okhotsk, the East Slavs emerged as a recognizable group in Europe between the 3rd and 8th centuries AD. Founded and ruled by a Varangian warrior elite and their descendants, in 988 it adopted Orthodox Christianity from the Byzantine Empire, beginning the synthesis of Byzantine and Slavic cultures that defined Russian culture for the next millennium. Rus ultimately disintegrated into a number of states, most of the Rus lands were overrun by the Mongol invasion. The Soviet Union played a role in the Allied victory in World War II. The Soviet era saw some of the most significant technological achievements of the 20th century, including the worlds first human-made satellite and the launching of the first humans in space. By the end of 1990, the Soviet Union had the second largest economy, largest standing military in the world. It is governed as a federal semi-presidential republic, the Russian economy ranks as the twelfth largest by nominal GDP and sixth largest by purchasing power parity in 2015. Russias extensive mineral and energy resources are the largest such reserves in the world, making it one of the producers of oil. The country is one of the five recognized nuclear weapons states and possesses the largest stockpile of weapons of mass destruction, Russia is a great power as well as a regional power and has been characterised as a potential superpower. The name Russia is derived from Rus, a state populated mostly by the East Slavs. However, this name became more prominent in the later history, and the country typically was called by its inhabitants Русская Земля. In order to distinguish this state from other states derived from it, it is denoted as Kievan Rus by modern historiography, an old Latin version of the name Rus was Ruthenia, mostly applied to the western and southern regions of Rus that were adjacent to Catholic Europe. The current name of the country, Россия, comes from the Byzantine Greek designation of the Kievan Rus, the standard way to refer to citizens of Russia is Russians in English and rossiyane in Russian. There are two Russian words which are translated into English as Russians
5.
Catherine the Great
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Catherine II of Russia, also known as Catherine the Great, was a Russian monarch. She was the female leader of Russia, reigning from 1762 until her death in 1796 at the age of 67. She came to following a coup détat when her husband. Russia was revitalised under her reign, growing larger and stronger than ever, in both her accession to power and in rule of her empire, Catherine often relied on her noble favourites, most notably Grigory Orlov and Grigory Potemkin. In the west, the Polish–Lithuanian Commonwealth, ruled by Catherines former lover, king Stanisław August Poniatowski, was eventually partitioned, in the east, Russia started to colonise Alaska, establishing Russian America. Catherine reformed the administration of Russian guberniyas, and many new cities, an admirer of Peter the Great, Catherine continued to modernise Russia along Western European lines. However, military conscription and the continued to depend on serfdom. This was one of the reasons behind several rebellions, including the large-scale Pugachevs Rebellion of cossacks. The period of Catherine the Greats rule, the Catherinian Era, is considered the Golden Age of the Russian Empire. The Manifesto on Freedom of the Nobility, issued during the reign of Peter III and confirmed by Catherine. Construction of many mansions of the nobility, in the classical style endorsed by the Empress and she enthusiastically supported the ideals of The Enlightenment, thus earning the status of an enlightened despot. Catherine was born in Stettin, Pomerania, Kingdom of Prussia as Princess Sophie Friederike Auguste von Anhalt-Zerbst-Dornburg, she was nicknamed Figchen. Her father, Christian August, Prince of Anhalt-Zerbst, belonged to the ruling German family of Anhalt, two of her first cousins became Kings of Sweden, Gustav III and Charles XIII. In accordance with the then prevailing in the ruling dynasties of Germany, she received her education chiefly from a French governess. She once wrote to her correspondent Baron Grimm, I see nothing of interest in it, although Catherine was born a princess, her family had very little money. Catherines rise to power was supported by her mothers relatives who were both wealthy nobles and royal relations. Catherine first met Peter III at the age of 10, based on her writings, she found Peter detestable upon meeting him. She disliked his pale complexion and his fondness for alcohol at such a young age, Peter also still played with toy soldiers
6.
Russian literature
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The roots of Russian literature can be traced to the Middle Ages, when epics and chronicles in Old Russian were composed. By the Age of Enlightenment, literature had grown in importance, romanticism permitted a flowering of poetic talent, Vasily Zhukovsky and later his protégé Alexander Pushkin came to the fore. The first great Russian novelist was Nikolai Gogol, then came Ivan Turgenev, who mastered both short stories and novels. Leo Tolstoy and Fyodor Dostoyevsky soon became internationally renowned, in the second half of the century Anton Chekhov excelled in short stories and became a leading dramatist. The beginning of the 20th century ranks as the Silver Age of Russian poetry, after the Revolution of 1917, Russian literature split into Soviet and white émigré parts. While the Soviet Union assured universal literacy and a highly developed book printing industry, in the 1930s Socialist realism became the predominant trend in Russia. Its leading figure was Maxim Gorky, who laid the foundations of this style, Nikolay Ostrovskys novel How the Steel Was Tempered has been among the most successful works of Russian literature. Alexander Fadeyev achieved success in Russia, some writers dared to oppose Soviet ideology, like Nobel Prize-winning novelist Aleksandr Solzhenitsyn, who wrote about life in the gulag camps. The Khrushchev Thaw brought some fresh wind to literature and poetry became a cultural phenomenon. This thaw did not last long, in the 1970s, some of the most prominent authors were banned from publishing, the end of the 20th century was a difficult period for Russian literature, with few distinct voices. Among the most discussed authors of this period were Victor Pelevin, who gained popularity with stories and novels, novelist and playwright Vladimir Sorokin. In the 21st century, a new generation of Russian authors appeared, differing greatly from the postmodernist Russian prose of the late 20th century, which lead critics to speak about new realism. Leading new realists include Ilja Stogoff, Zakhar Prilepin, Alexander Karasyov, Arkadi Babchenko, Vladimir Lorchenkov, Alexander Snegiryov, Russian authors have significantly contributed to numerous literary genres. Russia has five Nobel Prize in literature laureates, as of 2011, Russia was the fourth largest book producer in the world in terms of published titles. A popular folk saying claims Russians are the worlds most reading nation, Old Russian literature consists of several masterpieces written in the Old Russian language. The main type of Old Russian historical literature were chronicles, most of them anonymous, anonymous works also include The Tale of Igors Campaign and Praying of Daniel the Immured. Hagiographies formed a genre of the Old Russian literature. Life of Alexander Nevsky offers a well-known example, other Russian literary monuments include Zadonschina, Physiologist, Synopsis and A Journey Beyond the Three Seas
7.
Vasily Surikov
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Vasily Ivanovich Surikov was a Russian Realist history painter. Many of his works have become familiar to the public through their use as illustrations. He was born to an old Don Cossack family that had settled in Siberia and his father was a Collegiate Registrar, a civil service rank that often served as postmasters. In 1854, as a result of his father being reassigned, the moved to the village of Sukhobuzimskoye. In 1859, his father died of tuberculosis so the family returned to Krasnoyarsk and were forced to rent the second floor of their house to make ends meet and he began drawing while attending the district school and was encouraged by the local art teacher. His first formal work dates from 1862, but his family could not afford to continue his education and he became a clerk in a government office. This brought him contact with Pavel Zamyatin, the Governor of Yenisei, who was able to find him a patron, Pyotr Kuznetsov. After a year there, he was allowed to audit classes at the Academy, from 1869 to 1875, he studied with Pavel Chistyakov, Bogdan Willewalde and Pyotr Shamshin, winning several medals. His great attention to composition earned him a nickname, The Composer, in 1875, he graduated with the title of Artist, first degree. In 1877, he received a commission to paint murals at the Cathedral of Christ the Saviour, unable to afford a house, he lived in rented apartments and hotels and visited Krasnoyarsk whenever possible. In 1878, he married Elisabeth Charais, a French woman who was descended from the Decembrist, Pyotr Svistunov, after that, he chose to remain in Moscow and began the series of historical paintings that would establish his reputation, starting with The Morning of the Streltsy Execution. In 1881, he had his first exhibition with the Peredvizhniki, in 1883, Menshikov in Berezov was bought by Pavel Tretyakov for a sum that allowed him to take a European tour. In 1887, he added portraits to his repertoire, beginning one of his mother. In 1888, his wife died and he returned to Krasnoyarsk with his daughters and this was followed by a visit to his ancestral home in Siberia. There, on the Ob River, he made sketches for one of his most familiar works and this brought him a full membership in the Imperial Academy. In 1897, he visited Switzerland and painted Suvorov Crossing the Alps, in 1907, he left the Peredvizhniki and joined the Union of Russian Artists. Three years later, he visited Spain, together with his son-in-law and that same year, he and the architect, Leonid Chernishyov, opened an art school. Four years later, he made a stay in Krasnoyarsk
8.
Denis Diderot
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Denis Diderot was a French philosopher, art critic, and writer. He was a prominent figure during the Enlightenment and is best known for serving as co-founder, chief editor, Denis Diderot was born in Langres, Champagne, and began his formal education at a Jesuit collège in Langres. His parents were Didier Diderot a cutler, maître coutelier, three of five siblings survived to adulthood, Denise Diderot and their youngest brother Pierre-Didier Diderot, and finally their sister Angélique Diderot. According to Arthur McCandless Wilson, Denis Diderot greatly admired his sister Denise, in 1732 Denis Diderot earned the Master of Arts degree in philosophy. Then he entered the Collège dHarcourt of the University of Paris and he abandoned the idea of entering the clergy and decided instead to study at the Paris Law Faculty. His study of law was short-lived however and in 1734 Diderot decided to become a writer, because of his refusal to enter one of the learned professions, he was disowned by his father, and for the next ten years he lived a bohemian existence. In 1742 he befriended Jean-Jacques Rousseau, in 1743 he further alienated his father by marrying Antoinette Champion, a devout Roman Catholic. The match was considered due to Champions low social standing, poor education, fatherless status. She was about three years older than Diderot, the marriage in October 1743 produced one surviving child, a girl. Her name was Angélique, after both Diderots dead mother and sister, the death of his sister, a nun, from overwork in the convent may have affected Diderots opinion of religion. Babuti, Madeleine de Puisieux, Sophie Volland and Mme de Maux and his letters to Sophie Volland are known for their candor and are regarded to be among the literary treasures of the eighteenth century. Though his work was broad as well as rigorous, it did not bring Diderot riches, when the time came for him to provide a dowry for his daughter, he saw no alternative than to sell his library. When Empress Catherine II of Russia heard of his financial troubles she commissioned an agent in Paris to buy the library and she then requested that the philosopher retain the books in Paris until she required them, and act as her librarian with a yearly salary. Between October 1773 and March 1774, the sick Diderot spent a few months at the court in Saint Petersburg. Diderot died of thrombosis in Paris on 31 July 1784. His heirs sent his vast library to Catherine II, who had it deposited at the National Library of Russia and this idea seems to have been shelved. In 1745, he published a translation of Shaftesburys Inquiry Concerning Virtue and Merit, in 1746, Diderot wrote his first original work, the Philosophical Thoughts. In this book, Diderot argued for a reconciliation of reason with feeling so as to establish harmony, according to Diderot, without feeling there would be a detrimental effect on virtue and no possibility of creating sublime work
9.
Molding (process)
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Molding or moulding is the process of manufacturing by shaping liquid or pliable raw material using a rigid frame called a mold or matrix. This itself may have made using a pattern or model of the final object. A mold or mould is a block that is filled with a liquid or pliable material such as plastic, glass, metal. The liquid hardens or sets inside the mold, adopting its shape, a mold is the counterpart to a cast. The very common bi-valve molding process uses two molds, one for half of the object. Piece-molding uses a number of different molds, each creating a section of a complicated object and this is generally only used for larger and more valuable objects. The manufacturer who makes the molds is called the moldmaker, a release agent is typically used to make removal of the hardened/set substance from the mold easier. Typical uses for molded plastics include molded furniture, molded household goods, molded cases, and structural materials
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