|
Galactic Emission Mapping
The Galactic Emission Mapping survey (GEM) is an international project with the goal of making a precise map of the electromagnetic spectrum of our galaxy at low frequencies (radio and microwaves). Description of the project The GEM Radio Telescope measures the radio emission of our galaxy in five frequencies, between 408 MHz and 10 GHz, from different places of the earth. This data will be used to calibrate other telescopes, more specifically the Planck Surveyor, and will give the means to filter the Cyclotron Radiation and the free free radiation from other maps in a way that the only radiation left on the map is the Cosmic Microwave Background. The telescope is in construction at Pampilhosa da Serra, Portugal, but the receptor has already made measurements in Cachoeira Paulista, (Brazil), in Antártica, in Bishop (U.S.), Villa de Leyva (Colombia) and in Tenerife (Canary Islands). The main reflector has a parabolic form of 5.5 m of diameter.Tello, C. ''et al.'' Spillo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milky Way
The Milky Way or Milky Way Galaxy is the galaxy that includes the Solar System, with the name describing the #Appearance, galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye. The Milky Way is a barred spiral galaxy with a Galaxy#Isophotal diameter, D25 isophotal diameter estimated at , but only about 1,000 light-years thick at the spiral arms (more at the bulge). Recent simulations suggest that a dark matter area, also containing some visible stars, may extend up to a diameter of almost 2 million light-years (613 kpc). The Milky Way has several List of Milky Way's satellite galaxies, satellite galaxies and is part of the Local Group of galaxies, forming part of the Virgo Supercluster which is itself a component of the Laniakea Supercluster. It is estimated to contain 100–400 billion stars and at least that number of pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nobel Prize In Physics
The Nobel Prize in Physics () is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895 and awarded since 1901, the others being the Nobel Prize in Chemistry, Nobel Prize in Literature, Nobel Peace Prize, and Nobel Prize in Physiology or Medicine. Physics is traditionally the first award presented in the Nobel Prize ceremony. The prize consists of a medal along with a diploma and a certificate for the monetary award. The front side of the medal displays the same profile of Alfred Nobel depicted on the medals for Physics, Chemistry, and Literature. The first Nobel Prize in Physics was awarded to German physicist Wilhelm Röntgen in recognition of the extraordinary services he rendered by the discovery of X-rays. This award is administered by the Nobel Foundation and is widely regarded as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliophysics
Heliophysics (from the prefix "wikt:helio-, helio", from Attic Greek ''hḗlios'', meaning Sun, and the noun "physics": the science of matter and energy and their interactions) is the physics of the Sun and its connection with the Solar System. NASA defines heliophysics as "(1) the comprehensive new term for the science of the Sun - Solar System Connection, (2) the exploration, discovery, and understanding of Earth's space environment, and (3) the system science that unites all of the linked phenomena in the region of the cosmos influenced by a star like Sun, our Sun." Heliophysics is broader than Solar physics, that studies the Sun itself, including its interior, atmosphere, and magnetic fields. It concentrates on the Sun's effects on Earth and other bodies within the Solar System, as well as the changing conditions in space. It is primarily concerned with the magnetosphere, ionosphere, thermosphere, mesosphere, and upper atmosphere of the Earth and other planets. Heliophysics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformer
In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple Electrical network, circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force, electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are used to change Alternating current, AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid over time. It is the second-most-used substance (after water), the most–widely used building material, and the most-manufactured material in the world. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that can be poured and molded into shape. The cement reacts with the water through a process called hydration, which hardens it after several hours to form a solid matrix that binds the materials together into a durable stone-like material with various uses. This time allows concrete to not only be cast in forms, but also to have a variety of tooled processes performed. The hydration process is exothermic, which means that ambient temperature plays a significant role in how long it takes concrete to set. Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universidade De Aveiro
The University of Aveiro () is a public university, in addition to providing polytechnic education, located in the Portuguese city of Aveiro. Founded in 1973, it has a student population of approximately 12,500, distributed among 58 graduate, 40 Masters of Science and 25 PhD programs, distributed by departments and autonomous sections, with specialized faculties. It is a Research & Development university, with research departments developing programmes in fundamental and applied mathematics, physics, chemistry, telecommunications, robotics, bioinformatics, sea sciences, materials, design, business administration and industrial engineering. The main campus and nearby Administration and Accounting Institute, are located in the city centre of Aveiro. There are external/regional campuses in Águeda (Higher Education Technological and Management School of Águeda) and Oliveira de Azeméis (Higher Education School of North Aveiro). It serves as a pole for the inter-university Doctoral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diffraction
Diffraction is the deviation of waves from straight-line propagation without any change in their energy due to an obstacle or through an aperture. The diffracting object or aperture effectively becomes a secondary source of the Wave propagation, propagating wave. Diffraction is the same physical effect as Wave interference, interference, but interference is typically applied to superposition of a few waves and the term diffraction is used when many waves are superposed. Italian scientist Francesco Maria Grimaldi coined the word ''diffraction'' and was the first to record accurate observations of the phenomenon in 1660 in science, 1660. In classical physics, the diffraction phenomenon is described by the Huygens–Fresnel principle that treats each point in a propagating wavefront as a collection of individual spherical wavelets. The characteristic pattern is most pronounced when a wave from a Coherence (physics), coherent source (such as a laser) encounters a slit/aperture tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium
Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has a great affinity towards oxygen, passivation (chemistry), forming a protective layer of aluminium oxide, oxide on the surface when exposed to air. It visually resembles silver, both in its color and in its great ability to reflect light. It is soft, magnetism, nonmagnetic, and ductility, ductile. It has one stable isotope, 27Al, which is highly abundant, making aluminium the abundance of the chemical elements, 12th-most abundant element in the universe. The radioactive decay, radioactivity of aluminium-26, 26Al leads to it being used in radiometric dating. Chemically, aluminium is a post-transition metal in the boron group; as is common for the group, aluminium forms compounds primarily in the +3 oxidation state. The aluminium cation Al3+ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermal Radiation
Thermal radiation is electromagnetic radiation emitted by the thermal motion of particles in matter. All matter with a temperature greater than absolute zero emits thermal radiation. The emission of energy arises from a combination of electronic, molecular, and lattice oscillations in a material. Kinetic energy is converted to electromagnetism due to charge-acceleration or dipole oscillation. At room temperature, most of the emission is in the infrared (IR) spectrum, though above around 525 °C (977 °F) enough of it becomes visible for the matter to visibly glow. This visible glow is called incandescence. Thermal radiation is one of the fundamental mechanisms of heat transfer, along with conduction and convection. The primary method by which the Sun transfers heat to the Earth is thermal radiation. This energy is partially absorbed and scattered in the atmosphere, the latter process being the reason why the sky is visibly blue. Much of the Sun's radiation tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aveiro, Portugal
Aveiro () is a city and a List of municipalities of Portugal, municipality in Portugal. In 2021, the population was 80,880, in an area of : it is the second most populous city in the Centro Region, Portugal, Centro Region of Portugal (after Coimbra). Along with the neighbouring city of Ílhavo, Aveiro is part of an urban agglomeration that includes 120,000 inhabitants, making it one of the most important populated regions by density in the North Region, and primary centre of the Intermunicipal Community of Região de Aveiro, Aveiro and Baixo Vouga. Administratively, the president of the municipal government is José Ribau Esteves, elected by coalition between the Social Democratic Party (Portugal), Social Democratic Party and the People's Party (Portugal), Democratic Social Centre, who governs the ten civil parishes (). History The presence of human settlement in the territory of Aveiro extends to the period associated with the great dolmens of pre-history, which exist in most o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universidade Federal De Itajubá
The FISU World University Games, formerly the Universiade, is an international multi-sport event, organized for university athletes by the International University Sports Federation (FISU). The former name is a portmanteau of the words "University" and "Olympiad". The Universiade is referred to in English as the World University Games or World Student Games; however, this latter term can also refer to competitions for sub-University grades students. In July 2020 as part of a new branding system by the FISU, it was stated that the Universiade was to be officially branded as the FISU World University Games. The most recent summer event was the 2021 Summer World University Games held in Chengdu, China from 28 July – 8 August 2023, after being postponed twice due to the COVID-19 pandemic. It effectively replaced the 2023 Summer World University Games, that was set to be held in Yekaterinburg, Russia, which were cancelled due to the Russian invasion of Ukraine. The most recent win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instituto Nacional De Pesquisas Espaciais
The National Institute for Space Research (, INPE) is a research unit of the Brazilian Ministry of Science, Technology and Innovations, the main goals of which are fostering scientific research and technological applications and qualifying personnel in the fields of space and atmospheric sciences, space engineering, and space technology. While INPE is the civilian research center for aerospace activities, the Brazilian Air Force's General Command for Aerospace Technology is the military arm. INPE is located in the city of São José dos Campos, São Paulo. History On August 13, 1961, President Jânio Quadros signed a decree which created the Organizing Group for the National Commission on Space Activities (COGNAE). This group would give rise to the current National Institute for Space Research. COGNAE, which shortly after became known as CNAE, started its activities by stimulating, coordinating and supporting studies on space related areas, besides breeding a team of skilled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
