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Johann Joseph Von Prechtl
Johann Joseph Ritter von Prechtl (16 November 1778, Bischofsheim, Grand-Dukal Würzburg (today's) Lower Franconia 28 October 1854, Wieden No. 54 (today's Paniglgasse, 4th district of Vienna)) was a German-born Austrian (since 1802) technologist and educator. He is regarded as a pioneer of technical education in Austria. From 1796 he studied philosophy, theology and legal science in Würzburg, later working as a private instructor outside of Brünn, and afterwards as a teacher of natural sciences, chemistry and physics at a secondary school in Vienna (181014). In 1815 he became founder and first director of the Vienna Polytechnic Institute. With Johann Arzberger (17781835), he conducted research of public gas illumination, being credited with introducing a coal gas generating plant at the institute. Reportedly, in 1818, there were 25 operational public gas lanterns in Vienna. In 1823 he developed a portable baroscope. Written works With Karl Karmarsch (180379), he was edit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Joseph Von Prechtl
Johann Joseph Ritter von Prechtl (16 November 1778, Bischofsheim, Grand-Dukal Würzburg (today's) Lower Franconia 28 October 1854, Wieden No. 54 (today's Paniglgasse, 4th district of Vienna)) was a German-born Austrian (since 1802) technologist and educator. He is regarded as a pioneer of technical education in Austria. From 1796 he studied philosophy, theology and legal science in Würzburg, later working as a private instructor outside of Brünn, and afterwards as a teacher of natural sciences, chemistry and physics at a secondary school in Vienna (181014). In 1815 he became founder and first director of the Vienna Polytechnic Institute. With Johann Arzberger (17781835), he conducted research of public gas illumination, being credited with introducing a coal gas generating plant at the institute. Reportedly, in 1818, there were 25 operational public gas lanterns in Vienna. In 1823 he developed a portable baroscope. Written works With Karl Karmarsch (180379), he was edit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Wikipedia
The German Wikipedia (german: Deutschsprachige Wikipedia) is the German-language edition of Wikipedia, a free and publicly editable online encyclopedia. Founded on March 16, 2001, it is the second-oldest Wikipedia (after the English Wikipedia), and with articles, at present () the -largest edition of Wikipedia by number of articles, behind English Wikipedia and the mostly bot-generated Cebuano Wikipedia.] Alternative language Wikipedias, 16 March 2001List of Wikipedias/Table meta.wikimedia.org, Statistics It has the second-largest number of edits behind the English Wikipedia and over 260,000 disambiguation pages. On November 7, 2011, it became the second edition of Wikipedia, after the English edition, to exceed 100 million page edits. The German Wikipedia is criticized because of several ongoing p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alsergrund
Alsergrund (; Central Bavarian: ''Oisagrund'') is the ninth district of Vienna, Austria (german: 9. Bezirk, Alsergrund). It is located just north of the first, central district, Innere Stadt. Alsergrund was incorporated in 1862, with seven suburbs. As a central district, the area is densely populated. According to the census of 2001, there were 37,816 inhabitants over 2.99 square km (1.15 sq. mi). Many departments of the University of Vienna (main university), TU Wien and the University of Natural Resources and Life Sciences, Vienna, University of Natural Resources and Life Sciences (BOKU) are located in Alsergrund. Until 2013 the University of Economics and Business (Wirtschaftsuniversität Wien) was also located in the 9th district, but eventually moved to the Leopoldstadt, 2nd district. There are also many large hospitals, including the biggest in Vienna, the AKH (''Allgemeines Krankenhaus'', German language, German for ''General Hospital''). Alsergrund is associated with many n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dioptrics
Dioptrics is the branch of optics dealing with refraction, similarly the branch dealing with mirrors is known as catoptrics. Dioptrics is the study of the refraction of light, especially by lenses. Telescopes that create their image with an objective that is a convex lens ( refractors) are said to be "dioptric" telescopes. An early study of dioptrics was conducted by Ptolemy in relationship to the human eye as well as refraction in media such as water. The understanding of the principles of dioptrics was further expanded by Alhazen, considered the father of modern optics. See also * Diopter/ Dioptre (unit of measurement) * Dioptrice (work by Johannes Kepler) * Catoptrics (study of and optical systems utilizing reflection) * Catadioptrics (study of and optical systems utilizing reflection and refraction) * Optical telescope * List of telescope types * Image-forming optical system In optics, an image-forming optical system is a system capable of being used for imaging. The dia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Engineering
Mechanical engineering is the study of physical machines that may involve force and movement. It is an engineering branch that combines engineering physics and mathematics principles with materials science, to design, analyze, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches. Mechanical engineering requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity. In addition to these core principles, mechanical engineers use tools such as computer-aided design (CAD), computer-aided manufacturing (CAM), and product lifecycle management to design and analyze manufacturing plants, industrial equipment and machinery, heating and cooling systems, transport systems, aircraft, watercraft, robotics, medical devices, weapons, and others. Mechanical engineering emerged as a field during the Industrial Revolution in Europe in the 18th century; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Engineering
Chemical engineering is an engineering field which deals with the study of operation and design of chemical plants as well as methods of improving production. Chemical engineers develop economical commercial processes to convert raw materials into useful products. Chemical engineering uses principles of chemistry, physics, mathematics, biology, and economics to efficiently use, produce, design, transport and transform energy and materials. The work of chemical engineers can range from the utilization of nanotechnology and nanomaterials in the laboratory to large-scale industrial processes that convert chemicals, raw materials, living cells, microorganisms, and energy into useful forms and products. Chemical engineers are involved in many aspects of plant design and operation, including safety and hazard assessments, process design and analysis, modeling, control engineering, chemical reaction engineering, nuclear engineering, biological engineering, construction specification, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encyclopedia
An encyclopedia (American English) or encyclopædia (British English) is a reference work or compendium providing summaries of knowledge either general or special to a particular field or discipline. Encyclopedias are divided into articles or entries that are arranged alphabetically by article name or by thematic categories, or else are hyperlinked and searchable. Encyclopedia entries are longer and more detailed than those in most dictionaries. Generally speaking, encyclopedia articles focus on '' factual information'' concerning the subject named in the article's title; this is unlike dictionary entries, which focus on linguistic information about words, such as their etymology, meaning, pronunciation, use, and grammatical forms.Béjoint, Henri (2000)''Modern Lexicography'', pp. 30–31. Oxford University Press. Encyclopedias have existed for around 2,000 years and have evolved considerably during that time as regards language (written in a major international or a verna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Karmarsch
Karl Karmarsch (17 October 1803 – 24 March 1879) was an Austrian-born (since 1830) German educator, founding director of the Polytechnic School in Hanover, later to become the University of Hannover. From 1817 to 1823, he was associated with the Vienna University of Technology, Polytechnic Institute of Vienna, where he was a student of Georg Altmütter (1787–1858). From 1830 until his retirement in 1875, he served as director at Hanover, In 1863, he was elected a foreign member of the Royal Swedish Academy of Sciences. Karmarsch was a promoter of higher technical education in Germany, and considered a pioneer of mechanical engineering, mechanical technology.Biographical information @ aeiou Encyclopedia With Johann Joseph von Prechtl (17781854), he was an editor of a multi-volume encyclopedia of technology called ''Technol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baroscope
A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries. Barometers and pressure altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes. An altimeter is intended to be used at different levels matching the corresponding atmospheric pressure to the altitude, while a barometer is kept at the same level and measures subtle pressure changes caused by weather and elements of weather. The average atmospheric pressure on the earth's surface varies between 940 and 1040 hPa (mbar). The average atmospheric pressure at sea level is 1013 hPa (mbar). Etymology The word ''barometer'' is derived from the Ancient Greek (), meaning "weight", and (), meaning "measu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Gas
Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. It is produced when coal is heated strongly in the absence of air. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities. The original coal gas was produced by the coal gasification reaction, and thus the burnable component consisted of a roughly equal molecular mixture of carbon monoxide and hydrogen. Thus, coal gas was highly toxic. Other compositions contain additional calorific gases such as methane, produced by the Fischer-Tropsch process, and volatile hydrocarbons together with small quantities of non-calorific gases such as carbon dioxide and nitrogen. Prior to the development of natural gas supply and transmission—during the 1940s and 1950s in the United States and during the late 1960s and 1970s in the United Kingdom and Australia—almost all gas for fuel and lighting was manufactured fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
