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Topic Review
Ultra-Low-Frequency Oscillation
One of the prominent problems faced with hydro-dominant power system is ultra-low-frequency oscillation (ULFO) with a frequency deviation of 0.1 Hz lower, which is caused by the negative damping of hydro generators. ULFO might lead to an oscillation of all generators with the same oscillation frequency, restricting consumption of hydropower renewable energy.
  • 3.0K
  • 27 Oct 2020
Topic Review
Arbutin
Arbutin is a compound with a structure in which one molecule of D-glucose is bound to hydroquinone.
  • 3.0K
  • 18 Aug 2021
Biography
James Heppelmann
James E. Heppelmann (born September 4, 1964) [1] is an American engineer and businessman. He is the chief executive officer (CEO) of PTC (software company) (formerly Parametric Technology) a multinational software company he joined in January of 1998 as Senior Vice President Windchill, Parametric Technology Corp. Heppelmann grew up in rural Minnesota on a small dairy farm with his seven sibli
  • 3.0K
  • 29 Dec 2022
Topic Review
Polyetheretherketone
Polyetheretherketone (PEEK) is an aromatic, semi-crystalline linear thermoplastic polymer.
  • 3.0K
  • 18 Mar 2021
Topic Review
Ruby Pistol
The self-loading Ruby pistol is best known as a French World War I sidearm, the Pistolet Automatique de 7 millim.65 genre "Ruby". A very international piece of weaponry, it was closely modeled after John Browning's M1903 design produced by the Belgian Fabrique Nationale de Herstal, and was produced by over 50 Spanish companies, but primarily by the Spanish Gabilondo y Urresti firm (the official "Gabilondo Ruby"). It was decommissioned in 1958, more than a decade after World War II was brought to an end, and was subsequently replaced.
  • 3.0K
  • 20 Oct 2022
Topic Review
Seven Widely Used Open-Source Platforms
Simulation platforms are critical and indispensable tools for application developments of unmanned aerial vehicles (UAVs) because the UAVs are generally costly, have certain requirements for the test environment, and need professional licensed operators. Thus, developers prefer (or have) to test their applications on simulation platforms before implementing them on real machines. Seven widely used open-source simulation platforms, including Webots, Gazebo, CoppeliaSim, ARGoS, MRDS, MORSE, and USARSim.
  • 3.0K
  • 27 Apr 2023
Topic Review
Theranostics
“Theranostics,” a new concept of medical advances featuring a fusion of therapeutic and diagnostic systems, provides promising prospects in personalized medicine, especially cancer. 
  • 3.0K
  • 27 Apr 2021
Biography
Harold G. White
Harold G. "Sonny" White is a mechanical engineer, aerospace engineer and applied physicist who is the Advanced Propulsion Team Lead for the NASA Engineering Directorate and is known for proposing new Alcubierre drive concepts and promoting advanced propulsion projects, under development at the NASA Johnson Space Center, including the first practical experiment to test the existence of Alcubierre
  • 3.0K
  • 17 Nov 2022
Topic Review
Aydın
Aydın (/ˈaɪdɪn/ EYE-din; Turkish: [ˈajdɯn]; formerly named Güzelhisar, Ancient and Modern Greek: Τράλλεις /Tralleis/) is a city in and the seat of Aydın Province in Turkey's Aegean Region. The city is located at the heart of the lower valley of Büyük Menderes River (ancient Meander River) at a commanding position for the region extending from the uplands of the valley down to the seacoast. Its population was 207,554 in 2014. Aydın city is located along a region which was famous for its fertility and productivity since ancient times. Figs remain the province's best-known crop, although other agricultural products are also grown intensively and the city has some light industry. At the crossroads of a busy transport network of several types, a six-lane motorway connects Aydın to İzmir, Turkey's second port, in less than an hour, and in still less time to the international Adnan Menderes Airport, located along the road between the two cities. A smaller airport, namely Aydın Airport, is located a few kilometers in the South-East of Aydın. The region of Aydın also pioneered the introduction of railways into Turkey in the 19th century and still has the densest railroad network. The province of Aydın is also where a number of internationally known historic sites and centers of tourism are concentrated.
  • 3.0K
  • 18 Nov 2022
Biography
Matt Ridley
Matthew White Ridley, 5th Viscount Ridley DL FRSL FMedSci[1] (born 7 February 1958)[2] is a British journalist and businessman. Ridley is best known for his writings on science, the environment, and economics.[3] He has written several science books including The Red Queen: Sex and the Evolution of Human Nature (1994), Genome (1999), The Rational Optimist: How Prosperity Evolves (2010) and The E
  • 3.0K
  • 29 Nov 2022
Topic Review
Khitan Scripts
The Khitan scripts were the writing systems for the now-extinct Para-Mongolic Khitan language used in the 10th-12th century by the Khitan people who had established the Liao dynasty in Northeast China. There were two scripts, the large script (Chinese: 契丹大字; pinyin: qìdān dàzì) and the small script (Chinese: 契丹小字; pinyin: qìdān xiǎozì). These were functionally independent and appear to have been used simultaneously. The Khitan scripts continued to be in use to some extent by the Jurchen people for several decades after the fall of the Liao dynasty until the Jurchens fully switched to a script of their own. Examples of the scripts appeared most often on epitaphs and monuments, although other fragments sometimes surface. Many scholars recognize that the Khitan scripts have not been fully deciphered and that more research and discoveries would be necessary for a proficient understanding of them. The Khitan scripts are part of the Chinese family of scripts. Knowledge of the Khitan language, which was written by the Khitan script, is quite limited as well. Although there are several clues to its origins, which might point in different directions, the Khitan language shares an ancestor with the Mongolian languages but is not one.
  • 3.0K
  • 02 Dec 2022
Topic Review
Robots in STEAM Education
Robotics is increasingly entering the field of education. The tools, methods, and approaches of robotics contribute to the development of all areas of STEAM education, both individually and interdisciplinary. The entry highlights the robots that are most effective in STEAM education and to classify robots used in education in terms of their frequency of use, features, flexibility, manufacturer, sensors, software, programming language, connection, recommended age, usefulness in education, and their cost. It turned out that there are packages for building robots, pre-assembled robots, and social robots. Their form can be animal, human, car, etc., and they have various properties; for example, they can move and fly. Moreover, most of the robots proposed for education use block-based programming; for example, the Scratch language. Common features of robots are that the robot follows a path, reacts to sounds, and recognizes obstacles, with various sensors; for example, vision. Finally, it turned out to be necessary to design an activity guide for each lesson, which will be accompanied by instructions and specific steps for teachers and students.
  • 3.0K
  • 06 Apr 2023
Topic Review
Glucose
Glucose is a major macronutrient and a vital homeostatic factor in the regulation of energy metabolism maintained in a narrow range of 4.4 to 6.1 mmol/L or about 1.0 g/L in the blood of healthy humans as measured in the fasting state. However, glucose per se is not the predominant component of mixed food, and its main source in the diet is poly- and oligosaccharides, which undergo enzymatic hydrolysis to monomers in the small intestine during luminal and membrane digestion. Depending on the food composition, the site of the gastrointestinal tract (GIT) and time of the day, the postprandial glucose concentrations in the GIT lumen can vary in a large range and can be several times higher than in the blood.
  • 3.0K
  • 14 Aug 2021
Topic Review
Monoculture
Monoculture is the agricultural practice of producing or growing a single crop, plant, or livestock species, variety, or breed in a field or farming system at a time. Polyculture, where more than one crop is grown in the same space at the same time, is the alternative to monoculture. Monoculture is widely used in both industrial farming and organic farming and has allowed increased efficiency in planting and harvest. Continuous monoculture, or monocropping, where the same species is grown year after year, can lead to the quicker buildup of pests and diseases, and then rapid spread where a uniform crop is susceptible to a pathogen. The practice has been criticized for its environmental effects and for putting the food supply chain at risk. Diversity can be added both in time, as with a crop rotation or sequence, or in space, with a polyculture. Oligoculture has been suggested to describe a crop rotation of just a few crops, as is practiced by several regions of the world. The term monoculture is frequently applied for other uses to describe any group dominated by a single variety, e.g. social monoculturalism, or in the field of musicology to describe the dominance of the American and British music-industries in Western pop music, or in the field of computer science to describe a group of computers all running identical software.
  • 3.0K
  • 28 Nov 2022
Topic Review
Biomass Feedstocks Thermochemical Conversion Processes
An effective analytical technique for biomass characterisation is inevitable for biomass utilisation in energy production. To improve biomass processing, various thermal conversion methods such as torrefaction, pyrolysis, combustion, hydrothermal liquefaction, and gasification have been widely used to improve biomass processing. Thermogravimetric analysers (TG) and gas chromatography (GC) are among the most fundamental analytical techniques utilised in biomass thermal analysis. Thus, GC and TG, in combination with MS, FTIR, or two-dimensional analysis, were used to examine the key parameters of biomass feedstock and increase the productivity of energy crops. We can also determine the optimal ratio for combining two separate biomass or coals during co-pyrolysis and co-gasification to achieve the best synergetic relationship. 
  • 3.0K
  • 18 Sep 2021
Topic Review
CO2 Hydroboration
The use of CO2 as C1 building block for chemical synthesis is receiving growing attention, due to the potential of this simple molecule as abundant and cheap renewable feedstock. Among the possible reductants used in the literature to bring about CO2 reduction to C1 derivatives, hydroboranes have found various applications, in the presence of suitable homogenous catalysts. The main results obtained since 2016 in the synthetic design of main group, first and second row transition metals for use as catalysts for CO2 hydroboration are summarized.
  • 3.0K
  • 04 Jun 2024
Topic Review
T-Cell Receptor Repertoire Sequencing and Its Applications
The immune system is a dynamic feature of each individual and a footprint of our unique internal and external exposures. Indeed, the type and level of exposure to physical and biological agents shape the development and behavior of this complex and diffuse system. Many pathological conditions depend on how our immune system responds or does not respond to a pathogen or a disease or on how the regulation of immunity is altered by the disease itself. T-cells are important players in adaptive immunity and, together with B-cells, define specificity and monitor the internal and external signals that our organism perceives through its specific receptors, TCRs and BCRs, respectively. Today, high-throughput sequencing (HTS) applied to the TCR repertoire has opened a window of opportunity to disclose T-cell repertoire development and behavior down to the clonal level. Although TCR repertoire sequencing is easily accessible today, it is important to deeply understand the available technologies for choosing the best fit for the specific experimental needs and questions. Here, an updated overview of TCR repertoire sequencing strategies, providers and applications to infectious diseases and cancer to guide researchers’ choice through the multitude of available options is provided. The possibility of extending the TCR repertoire to HLA characterization will be of pivotal importance in the near future to understand how specific HLA genes shape T-cell responses in different pathological contexts and will add a level of comprehension that was unthinkable just a few years ago.
  • 3.0K
  • 24 Aug 2022
Topic Review
Resistance in Powdery Mildew Fungi
Powdery mildew fungi (Erysiphales) are among the most common and important plant fungal pathogens. These fungi are obligate biotrophic parasites that attack nearly 10,000 species of angiosperms, including major crops, such as cereals and grapes. Although cultural and biological practices may reduce the risk of infection by powdery mildew, they do not provide sufficient protection. Therefore, in practice, chemical control, including the use of fungicides from multiple chemical groups, is the most effective tool for managing powdery mildew. Unfortunately, the risk of resistance development is high because typical spray programs include multiple applications per season. In addition, some of the most economically destructive species of powdery mildew fungi are considered to be high-risk pathogens and are able to develop resistance to several chemical classes within a few years. This situation has decreased the efficacy of the major fungicide classes, such as sterol demethylation inhibitors, quinone outside inhibitors and succinate dehydrogenase inhibitors, that are employed against powdery mildews.
  • 3.0K
  • 25 Sep 2020
Topic Review
Wild Turkey
The wild turkey (Meleagris gallopavo) is an upland ground bird native to North America, one of two extant species of turkey, and the heaviest member of the order Galliformes. It is the ancestor to the domestic turkey, which was originally derived from a southern Mexican subspecies of wild turkey (not the related ocellated turkey). Although native to North America, the turkey probably got its name from the domesticated variety being imported to Britain in ships coming from the Levant via Spain. The British at the time therefore associated the wild turkey with the country Turkey and the name prevails. An alternative theory posits that another bird, a guinea fowl native to Madagascar introduced to England by Turkish merchants, was the original source, and that the term was then transferred to the New World bird by English colonizers with knowledge of the previous species.
  • 3.0K
  • 16 Nov 2022
Topic Review
SLNs/NLCs Preparation Method
Solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs) are alternatives to other colloidal drug delivery systems, such as liposomes, emulsions, and polymeric nanoparticles. They have been produced using numerous methods.
  • 3.0K
  • 20 Apr 2021
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