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Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. The name opal is believed to be derived from the Sanskrit word upala (उपल), which means 'jewel', and later the Greek derivative opállios (ὀπάλλιος), which means 'to see a change in color'. There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence); common opal does not. Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light." The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered the rarest, while white, gray, and green opals are the most common.
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Topic Review
Concentrative Movement Therapy
Concentrative movement therapy (CMT) is a psychotherapeutic method for group and individual therapy which is based on thought models stemming from psychodynamic psychotherapy and depth psychology. Taking as its point of departure the theory that perception is composed of sensation and experience (Viktor von Weizsäcker), CMT is interested in the conscious perception of the body in the "here and now" against the background of the individual life and learning story.
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  • 24 Oct 2022
Topic Review
Delphi
Delphi is a general-purpose programming language and a software product that uses the Delphi dialect of the Object Pascal programming language and provides an integrated development environment (IDE) for rapid application development of desktop, mobile, web, and console software, currently developed and maintained by Embarcadero Technologies. Delphi's compilers generate native code for Microsoft Windows, macOS, iOS, Android and Linux (x64). Delphi includes a code editor, a visual designer, an integrated debugger, a source code control component, and support for third-party plugins. The code editor features Code Insight (code completion), Error Insight (real-time error-checking), and refactoring. The visual forms designer has the option of using either the Visual Component Library (VCL) for pure Windows development or the FireMonkey (FMX) framework for cross-platform development. Database support is a key feature and is provided by FireDAC (Database Access Components). Delphi is known for its fast compilation speed, native code, and developer productivity. Delphi was originally developed by Borland as a rapid application development tool for Windows as the successor of Turbo Pascal. Delphi added full object-oriented programming to the existing language, and the language has grown to support generics, anonymous methods, closures, and native Component Object Model (COM) support. Delphi and its C++ counterpart, C++Builder, are interoperable and jointly sold under the name RAD Studio. There are Professional, Enterprise, and Architect editions, with the higher editions having more features at a higher price. There is also a free-of-charge Community edition, with most of the features of Professional, but restricted to users and companies with low revenue.
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Topic Review
Sirenik Eskimo Language
Sirenik Yupik, Sireniki Yupik (also Old Sirenik or Vuteen), Sirenik, or Sirenikskiy is an extinct Eskimo–Aleut language. It was spoken in and around the village of Sireniki (Сиреники) in Chukotka Peninsula, Chukotka Autonomous Okrug, Russia . The language shift has been a long process, ending in total language death. In January 1997, the last native speaker of the language, a woman named Vyjye (Valentina Wye) (Russian: Выйе), died. Ever since that point, the language has been extinct; nowadays, all Sirenik Eskimos speak Siberian Yupik or Russian. Сиӷы́ных [siˈʁənəx] is the endonym for the eponymous settlement of Sireniki. The endonym for the people itself is сиӷы́ныгмы̄́ӷий [siˈʁənəɣˈməːʁij] "Sirenikites"; the singular form is сиӷы́ныгмы̄́ӷа [siˈʁənəɣˈməːʁa]). This article is based on Menovschikov (1964), with cited examples transliterated from Cyrillic transcription to the International Phonetic Alphabet.
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Topic Review
Secularity
Secularity (from Latin saeculum, "worldly" or "of a generation") is the state of being separate from religion, or of not being exclusively allied with or against any particular religion. Historically, the word secular was not related or linked to religion, but was a freestanding term in Latin which would relate to any mundane endeavour. However, the term, saecula saeculorum (saeculōrum being the genitive plural of saeculum) as found in the New Testament in the Vulgate translation (circa 410) of the original Koine Greek phrase εἰς τοὺς αἰῶνας τῶν αἰώνων (eis toùs aionas ton aiṓnōn), e.g. at Galatians 1:5, was used in the early Christian church (and is still used today), in the doxologies, to denote the coming and going of the ages, the grant of eternal life, and the long duration of created things from their beginning to forever and ever. The idea of a dichotomy between religion and the secular originated in the European Enlightenment. Furthermore, since religion and secular are both Western concepts that were formed under the influence of Christian theology, other cultures do not necessarily have words or concepts that resemble or are equivalent to them. In many cultures, "little conceptual or practical distinction is made between 'natural' and 'supernatural' phenomena" and the very notions of religious and nonreligious dissolve into unimportance, nonexistence, or unawareness, especially since people have beliefs in other supernatural or spiritual things irrespective of belief in God or gods. Conceptions of what is and what is not religion vary in contemporary East Asia as well. The shared term for "irreligion" or "no religion" (無宗教, Chinese pron. wú zōngjiào, Japanese pron. mu shūkyō) with which the majority of East Asian populations identify themselves implies non-membership in one of the institutional religions (such as Buddhism and Christianity) but not necessarily non-belief in traditional folk religions collectively represented by Chinese Shendao (shén dào) and Japanese Shinto (both meaning "ways of gods").[lower-alpha 1] In modern Japan, religion has negative connotation since it is associated with foreign belief systems so many identify as "nonreligious" (mushukyo), but this does not mean they have a complete rejection or absence of beliefs and rituals relating to supernatural, metaphysical, or spiritual things. In the Meiji era, the Japanese government consciously excluded Shinto from the category of religion in order to enforce State Shinto while asserting their state followed American-mandated requirements for freedom of religion; this has fed into the contemporary Japanese experience of "secularity" as well as the government's regulation of religious beliefs and institutions from the Meiji era into the present day. One can regard eating and bathing as examples of secular activities, because there may not be anything inherently religious about them. Nevertheless, some religious traditions see both eating and bathing as sacraments, therefore making them religious activities within those world views. Saying a prayer derived from religious text or doctrine, worshipping through the context of a religion, performing corporal and spiritual works of mercy, and attending a religious seminary school or monastery are examples of religious (non-secular) activities. The "secular" is experienced in diverse ways ranging from separation of religion and state to being anti-religion or even pro-religion, depending on the culture. For example, the United States has both separation of church and state and pro-religiosity in various forms such as protection of religious freedoms; France has separation of church and state (and French Revolution was strongly anti-religious); the Soviet Union was anti-religion; in India, people feel comfortable identifying as secular while participating in religion; and in Japan, since the concept of "religion" is not indigenous to Japan, people state they have no religion while doing what appears to be religion to Western eyes. A related term, secularism, involves the principle that government institutions and their representatives should remain separate from religious institutions, their beliefs, and their dignitaries. Many businesses and corporations, and some governments operate on secular lines. This stands in contrast to theocracy, government with deity as its highest authority.
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Topic Review
History of the Middle East
Home to the Cradle of Civilization, the Middle East (usually interchangeable with the Near East) has seen many of the world's oldest cultures and civilizations. This history started from the earliest human settlements, continuing through several major pre- and post-Islamic Empires through to the nation-states of the Middle East today. Template:Human history Egyptian civilization coalesced around 3150 BC with the political unification of Upper and Lower Egypt under the first pharaoh. Mesopotamia was home to several powerful empires that came to rule almost the entire Middle East—particularly the Assyrian Empires of 1365–1076 BC and the Neo-Assyrian Empire of 911–609 BC. From the early 7th century BC and onwards, the Iranian Medes followed by Achaemenid Persia and other subsequent Iranian states empires dominated the region. In the 1st century BC, the expanding Roman Republic absorbed the whole Eastern Mediterranean, which included much of the Near East. The Eastern Roman Empire, today commonly known as the Byzantine Empire, ruling from the Balkans to the Euphrates, became increasingly defined by and dogmatic about Christianity, gradually creating religious rifts between the doctrines dictated by the establishment in Constantinople and believers in many parts of the Middle East. From the 3rd up to the course of the 7th century AD, the entire Middle East was dominated by the Byzantines and Sassanid Persia. From the 7th century, a new power was rising in the Middle East, that of Islam. The dominance of the Arabs came to a sudden end in the mid-11th century with the arrival of the Seljuq Turks. In the early 13th century, a new wave of invaders, the armies of the Mongol Empire, mainly Turkic, swept through the region. By the early 15th century, a new power had arisen in western Anatolia, the Ottoman emirs, linguistically Turkic and religiously Islamic, who in 1453 captured the Christian Byzantine capital of Constantinople and made themselves sultans. Large parts of the Middle East became a warground between the Ottomans and Iranian Safavids for centuries starting in the early 16th century. By 1700, the Ottomans had been driven out of Hungary and the balance of power along the frontier had shifted decisively in favor of the West. The British also established effective control of the Persian Gulf, and the French extended their influence into Lebanon and Syria. In 1912, the Italians seized Libya and the Dodecanese islands, just off the coast of the Ottoman heartland of Anatolia. In the late 19th and early 20th centuries, Middle Eastern rulers tried to modernize their states to compete more effectively with the European powers. A turning point in the history of the Middle East came when oil was discovered, first in Persia in 1908 and later in Saudi Arabia (in 1938) and the other Persian Gulf states, and also in Libya and Algeria. A Western dependence on Middle Eastern oil and the decline of British influence led to a growing American interest in the region. During the 1920s, 1930s, and 1940s, Syria and Egypt made moves towards independence. The British, the French, and the Soviets departed from many parts of the Middle East during and after World War II (1939–1945). The struggle between the Arabs and the Jews in Palestine culminated in the 1947 United Nations plan to partition Palestine. Later in the midst of Cold War tensions, the Arabic-speaking countries of Western Asia and Northern Africa saw the rise of pan-Arabism. The departure of the European powers from direct control of the region, the establishment of Israel, and the increasing importance of the oil industry, marked the creation of the modern Middle East. In most Middle Eastern countries, the growth of market economies was inhibited by political restrictions, corruption and cronyism, overspending on arms and prestige projects, and over-dependence on oil revenues. The wealthiest economies in the region per capita are the small oil-rich countries of Persian Gulf: Qatar, Kuwait, Bahrain, and the United Arab Emirates. A combination of factors—among them the 1967 Six-Day War, the 1970s energy crisis beginning with the 1973 OPEC oil embargo in response to U.S. support of Israel in the Yom Kippur War, the concurrent Saudi-led popularization of Salafism/Wahhabism, and the 1978-79 Iranian Revolution—promoted the increasing rise of Islamism and the ongoing Islamic revival (Tajdid). The Fall of the Soviet Union in 1991 brought a global security refocus from the Cold War to a War on Terror. Starting in the early 2010s, a revolutionary wave popularly known as the Arab Spring brought major protests, uprisings, and revolutions to several Middle Eastern and Maghreb countries. Clashes in western Iraq on 30 December 2013 were preliminary to the Sunni pan-Islamist ISIL uprising. The term Near East can be used interchangeably with Middle East, but in a different context, especially when discussing ancient times, it may have a limited meaning, namely the northern, historically Aramaic-speaking Semitic area and adjacent Anatolian territories, marked in the two maps below.
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Topic Review
OmniGo 700LX Communicator Plus
The HP 200LX Palmtop PC (F1060A, F1061A, F1216A), also known as project Felix, is a personal digital assistant introduced by Hewlett-Packard in August 1994. It was often called a Palmtop PC, and it was notable that it was, with some minor exceptions, a MS-DOS-compatible computer in a palmtop format, complete with a monochrome graphic display, QWERTY keyboard, serial port, and PCMCIA expansion slot.
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Jet (Gemstone)
Jet is a type of lignite, the lowest rank of coal, and is a gemstone. Unlike many gemstones, jet is not a mineral, but is rather a mineraloid. It is derived from wood that has changed under extreme pressure. The English noun jet derives from the French word for the same material, jaiet (modern French jais), ultimately referring to the ancient town of Gagae. Jet is either black or dark brown, but may contain pyrite inclusions which are of brassy colour and metallic lustre. The adjective "jet-black", meaning as dark a black as possible, derives from this material.
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Topic Review
Ferroelectric Polymers
Ferroelectric polymers are a group of crystalline polar polymers that are also ferroelectric, meaning that they maintain a permanent electric polarization that can be reversed, or switched, in an external electric field. Ferroelectric polymers, such as polyvinylidene fluoride (PVDF), are used in acoustic transducers and electromechanical actuators because of their inherent piezoelectric response, and as heat sensors because of their inherent pyroelectric response. right|thumb|Figure 1: Structure of poly(vinylidene fluoride)
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Topic Review
Photon
A photon (from grc φῶς, φωτός  'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless,[lower-alpha 1] so they always move at the speed of light in vacuum, 299792458 m/s (or about 186,282 mi/s). The photon belongs to the class of bosons. Like all elementary particles, photons are currently best explained by quantum mechanics, and exhibit wave–particle duality, their behavior featuring properties of both waves and particles. The modern photon concept originated during the first two decades of the 20th century with the work of Albert Einstein, who built upon the research of Max Planck. While trying to explain how matter and electromagnetic radiation could be in thermal equilibrium with one another, Planck proposed that the energy stored within a material object should be regarded as composed of an integer number of discrete, equal-sized parts. To explain the photoelectric effect, Einstein introduced the idea that light itself is made of discrete units of energy. In 1926, Gilbert N. Lewis popularized the term photon for these energy units. Subsequently, many other experiments validated Einstein's approach. In the Standard Model of particle physics, photons and other elementary particles are described as a necessary consequence of physical laws having a certain symmetry at every point in spacetime. The intrinsic properties of particles, such as charge, mass, and spin, are determined by gauge symmetry. The photon concept has led to momentous advances in experimental and theoretical physics, including lasers, Bose–Einstein condensation, quantum field theory, and the probabilistic interpretation of quantum mechanics. It has been applied to photochemistry, high-resolution microscopy, and measurements of molecular distances. Moreover, photons have been studied as elements of quantum computers, and for applications in optical imaging and optical communication such as quantum cryptography.
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