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HandWiki is the world's largest wiki-style encyclopedia dedicated to science, technology and computing. It allows you to create and edit articles as long as you have external citations and login account. In addition, this is a content management environment that can be used for collaborative editing of original scholarly content, such as books, manuals, monographs and tutorials.

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Atmospheric Sciences
Atmospheric sciences are the study of the Earth's atmosphere, its processes, the effects other systems have on the atmosphere, and the effects of the atmosphere on these other systems. Meteorology includes atmospheric chemistry and atmospheric physics with a major focus on weather forecasting. Climatology is the study of atmospheric changes (both long and short-term) that define average climates and their change over time, due to both natural and anthropogenic climate variability. Aeronomy is the study of the upper layers of the atmosphere, where dissociation and ionization are important. Atmospheric science has been extended to the field of planetary science and the study of the atmospheres of the planets of the solar system. Experimental instruments used in atmospheric sciences include satellites, rocketsondes, radiosondes, weather balloons, and lasers. The term aerology (from Greek ἀήρ, aēr, "air"; and -λογία, -logia) is sometimes used as an alternative term for the study of Earth's atmosphere. Early pioneers in the field include Léon Teisserenc de Bort and Richard Assmann.
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  • 04 Nov 2022
Topic Review
Server Immersion Cooling
Immersion cooling is an IT cooling practice by which IT components and other electronics, including complete servers, are submerged in a thermally conductive dielectric liquid or coolant. Heat is removed from the system by circulating liquid into direct contact with hot components, then through cool heat exchangers. Fluids suitable for immersion cooling have very good insulating properties to ensure that they can safely come into contact with energized electronic components.
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  • 08 Nov 2022
Topic Review
Power Set
In mathematics, the power set (or powerset) of any set S is the set of all subsets of S, including the empty set and S itself, variously denoted as P(S), 𝒫(S), ℘(S) (using the "Weierstrass p"), P(S), ℙ(S), or, identifying the powerset of S with the set of all functions from S to a given set of two elements, 2S. In axiomatic set theory (as developed, for example, in the ZFC axioms), the existence of the power set of any set is postulated by the axiom of power set. Any subset of P(S) is called a family of sets over S.
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  • 04 Nov 2022
Topic Review
Biology Monte Carlo Method
Biology Monte Carlo methods (BioMOCA) have been developed at the University of Illinois at Urbana-Champaign to simulate ion transport in an electrolyte environment through ion channels or nano-pores embedded in membranes. It is a 3-D particle-based Monte Carlo simulator for analyzing and studying the ion transport problem in ion channel systems or similar nanopores in wet/biological environments. The system simulated consists of a protein forming an ion channel (or an artificial nanopores like a Carbon Nano Tube, CNT), with a membrane (i.e. lipid bilayer) that separates two ion baths on either side. BioMOCA is based on two methodologies, namely the Boltzmann transport Monte Carlo (BTMC) and particle-particle-particle-mesh (P3M). The first one uses Monte Carlo method to solve the Boltzmann equation, while the later splits the electrostatic forces into short-range and long-range components.
  • 586
  • 04 Nov 2022
Topic Review
Access Economy
The access economy is a business model where goods and services are traded on the basis of access rather than ownership: it refers to renting things temporarily rather than selling them permanently. The term arose as a correction to the term sharing economy because major players in the sharing economy, such as Airbnb, Zipcar, and Uber, are commercial enterprises whose businesses do not involve any sharing. This model uses a technology platform, often accessed via mobile phone, to connect suppliers willing to rent assets (e.g., apartments for rent or cars for transportation services) with consumers. This movement was worth around $26 billion a year in 2015. The number of persons involved in the access economy is not easily measured. The "access economy" or "on-demand economy" poses regulatory and political challenges, such as: defining the nature of the employment relationship; designing regulations to safeguard parties to these transactions; the loss of taxes and corporate access that results from moving away from small locally owned companies to large remote technology companies; and the bypassing of local regulations (such as the requirement for taxi drivers to provide wheelchair vans, or provide drivers 24-7).
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  • 04 Nov 2022
Topic Review
Participative Decision-Making
Participative decision-making (PDM) is the extent to which employers allow or encourage employees to share or participate in organizational decision-making (Probst, 2005). According to (Cotton Vollrath), the format of PDM could be formal or informal. In addition, the degree of participation could range from zero to 100% in different participative management (PM) stages (Cotton et al. 1988; Black & Gregersen 1997; Brenda, 2001). PDM is one of many ways in which an organization can make decisions. The leader must think of the best possible style that will allow the organization to achieve the best results. According to psychologist Abraham Maslow, workers need to feel a sense of belonging to an organization (see Maslow's hierarchy of needs).
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  • 04 Nov 2022
Topic Review
PADICAT
PADICAT acronym for Patrimoni Digital de Catalunya, in Catalan; or Digital Heritage of Catalonia, in English, is the Web Archive of Catalonia. Created in 2005 by the Biblioteca de Catalunya, the public institution responsible for collecting, preserving and distributing the bibliographic heritage, and the digital heritage by extension. Has the technological collaboration of the Center for Scientific and Academic Services of Catalonia, (CESCA) for preserving and giving access to old versions of web pages published on the Internet. The Biblioteca de Catalunya, as the responsible of PADICAT, is member of the International Internet Preservation Consortium (IIPC).
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  • 08 Nov 2022
Topic Review
Harbour
Harbour is a modern computer programming language, primarily used to create database/business programs. It is a modernized, open sourced and cross-platform version of the older Clipper system, which in turn developed from the dBase database market of the 1980s and 90s. Harbour code using the same databases can be compiled under a wide variety of platforms, including Microsoft Windows, Linux, Unix variants, several BSD descendants, Mac OS X, MINIX 3, Windows CE, Pocket PC, Symbian, iOS, Android, QNX, VxWorks, OS/2/eComStation, BeOS/Haiku, AIX and MS-DOS.
  • 1.7K
  • 04 Nov 2022
Topic Review
NOAAS Okeanos Explorer
NOAAS Okeanos Explorer (R 337) is a converted United States Navy ship (formerly USNS Capable (T-AGOS-16)), now an exploratory vessel for the National Oceanic and Atmospheric Administration (NOAA), officially launched in 2010. Starting in 2010, NOAA entered into a five-year partnership with the San Francisco Exploratorium. The focus is on gathering scientific information about oceans for the public as well as for scientific uses. As much as 95% of the ocean remains unexplored, NOAA officials said. The ship is equipped with cameras and will provide real-time viewing of the ocean floor for scientists and for the public. This is a pioneering use of what NOAA calls "telepresence technology". The Okeanos Explorer is the only vessel owned by the U.S. government that is dedicated to exploring the seabed and ocean crust. The ship is named after Okeanos, the Ancient Greek god of the sea, from which also comes the word "ocean".
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  • 04 Nov 2022
Topic Review
PSR J1614–2230
PSR J1614–2230 is a neutron star in a binary system with a white dwarf. It was discovered in 2006 with the Parkes telescope in a survey of unidentified gamma ray sources in the Energetic Gamma Ray Experiment Telescope catalog. PSR J1614–2230 is a millisecond pulsar, a type of neutron star, that spins on its axis roughly 317 times per second, corresponding to a period of 3.15 milliseconds. Like all pulsars, it emits radiation in a beam, similar to a lighthouse. Emission from PSR J1614–2230 is observed as pulses at the spin period of PSR J1614–2230. The pulsed nature of its emission allows for the arrival of individual pulses to be timed. By measuring the arrival time of pulses, astronomers observed the delay of pulse arrivals from PSR J1614–2230 when it was passing behind its companion from the vantage point of Earth. By measuring this delay, known as the Shapiro delay, astronomers determined the mass of PSR J1614–2230 and its companion. The team performing the observations found that the mass of PSR J1614–2230 is 1.97 ± 0.04 M☉. This mass made PSR J1614–2230 the most massive known neutron star at the time of discovery, and rules out many neutron star equations of state that include exotic matter such as hyperons and kaon condensates. In 2013, a slightly higher neutron star mass measurement was announced for PSR J0348+0432, 2.01 ± 0.04 M☉. This confirmed the existence of such massive neutron stars using a different measuring technique.
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