Hydrocarbon explorationHydrocarbon exploration (or oil and gas exploration) is the search by petroleum geologists and geophysicists for deposits of hydrocarbons, particularly petroleum and natural gas, in the Earth's crust using petroleum geology. Visible surface features such as oil seeps, natural gas seeps, pockmarks (underwater craters caused by escaping gas) provide basic evidence of hydrocarbon generation (be it shallow or deep in the Earth). However, most exploration depends on highly sophisticated technology to detect and determine the extent of these deposits using exploration geophysics.
Digital filterIn signal processing, a digital filter is a system that performs mathematical operations on a sampled, discrete-time signal to reduce or enhance certain aspects of that signal. This is in contrast to the other major type of electronic filter, the analog filter, which is typically an electronic circuit operating on continuous-time analog signals. A digital filter system usually consists of an analog-to-digital converter (ADC) to sample the input signal, followed by a microprocessor and some peripheral components such as memory to store data and filter coefficients etc.
Romanian languageRomanian (obsolete spellings: Rumanian or Roumanian; autonym: limba română ˈlimba roˈmɨnə, or românește, in Romanian) is the official and main language of Romania and Moldova. As a minority language it is spoken by stable communities in the countries surrounding Romania (Bulgaria, Hungary, Serbia and Ukraine), and by the large Romanian diaspora. In total, it is spoken by 28–29 million people as an L1+L2 language, of whom 24 million are native speakers. In Europe, Romanian occupies the 10th position among 37 official languages.
Arabic literatureArabic literature (الأدب العربي / ALA-LC: al-Adab al-‘Arabī) is the writing, both as prose and poetry, produced by writers in the Arabic language. The Arabic word used for literature is Adab, which is derived from a meaning of etiquette, and which implies politeness, culture and enrichment. Arabic literature emerged in the 5th century with only fragments of the written language appearing before then. The Qur'an, widely regarded as the finest piece of literature in the Arabic language, would have the greatest lasting effect on Arab culture and its literature.
Romansh languageRomansh (roʊˈmænʃ,_roʊˈmɑːnʃ ; sometimes also spelled Romansch and Rumantsch) is a Gallo-Romance language spoken predominantly in the Swiss canton of the Grisons (Graubünden). Romansh has been recognized as a national language of Switzerland since 1938, and as an official language in correspondence with Romansh-speaking citizens since 1996, along with German, French, and Italian. It also has official status in the canton of the Grisons alongside German and Italian and is used as the medium of instruction in schools in Romansh-speaking areas.
