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Topic Review
Manjaro Linux
Manjaro Linux, or simply Manjaro /mənˈdʒɑːroʊ/, is an open source operating system for computers. It is a distribution of Linux based on the Arch Linux distribution. Manjaro Linux has a focus on user friendliness and accessibility and the system itself is designed to work fully ‘straight out of the box’ with its variety of pre-installed software. It features a rolling release update model and uses pacman as its package manager.
  • 4.9K
  • 04 Nov 2022
Topic Review
Principle of Least Action
The principle of least action – or, more accurately, the principle of stationary action – is a variational principle that, when applied to the action of a mechanical system, can be used to obtain the equations of motion for that system. It was historically called "least" because its solution requires finding the path of motion in space that has the least value. The principle can be used to derive Newtonian, Lagrangian and Hamiltonian equations of motion, and even general relativity (see Einstein–Hilbert action). In relativity, a different action must be minimized or maximized. The classical mechanics and electromagnetic expressions are a consequence of quantum mechanics. The stationary action method helped in the development of quantum mechanics. In 1933, the physicist Paul Dirac demonstrated how this principle can be used in quantum calculations by discerning the quantum mechanical underpinning of the principle in the quantum interference of amplitudes. Subsequently Julian Schwinger and Richard Feynman independently applied this principle in quantum electrodynamics. The principle remains central in modern physics and mathematics, being applied in thermodynamics, fluid mechanics, the theory of relativity, quantum mechanics, particle physics, and string theory and is a focus of modern mathematical investigation in Morse theory. Maupertuis' principle and Hamilton's principle exemplify the principle of stationary action. The action principle is preceded by earlier ideas in optics. In Ancient Greece , Euclid wrote in his Catoptrica that, for the path of light reflecting from a mirror, the angle of incidence equals the angle of reflection. Hero of Alexandria later showed that this path was the shortest length and least time. Scholars often credit Pierre Louis Maupertuis for formulating the principle of least action because he wrote about it in 1744 and 1746. However, Leonhard Euler discussed the principle in 1744,[ and evidence shows that Gottfried Leibniz preceded both by 39 years.
  • 4.9K
  • 29 Sep 2022
Topic Review
Tricuspid Atresia
Tricuspid atresia (TA) is a cyanotic, congenital heart defect (CHD) and is defined as congenital absence or agenesis of the morphologic tricuspid valve. It is the third most common cyanotic CHD, and is the most common cause of cyanosis with left ventricular hypertrophy. The prevalence of TA is estimated to be 2.9% of autopsy cases and 1.4% to 1.5% of the clinical cases of CHD.
  • 4.9K
  • 20 Oct 2021
Topic Review
Lactoferrin and Ferrous Sulfate Supplementation in Iron-Deficiency Anemia
Ferrous sulfate is a commonly used iron supplement for the correction of iron-deficiency anemia but with frequent gastrointestinal side effects. Milk-derived iron-binding glycoprotein lactoferrin possesses well gastrointestinal tolerance and fewer side effects caused by the intake of high-dose iron. However, the underlying mechanism of the iron-enhancing effect of lactoferrin remains unclear. In addition, the comparative efficacies between lactoferrin and ferrous sulfate are also remained to be determined. Studies support lactoferrin as a superior supplement to ferrous sulfate regarding the improvement in serum iron parameters and hemoglobin levels. 
  • 4.9K
  • 13 Apr 2022
Topic Review
GC-IMS
Gas chromatography-ion mobility spectrometry (GC-IMS) is a powerful technique for the separation and sensitive detection of volatile organic compounds (VOCs). It is a rapid, robust and easy-to-handle technique, which has recently gained attention for targeted as well as non-targeted screening (NTS) approaches. In this article, the general working principles of GC-IMS are presented.
  • 4.9K
  • 03 Nov 2021
Topic Review
Gade Language in Nigeria
The Gade people of Nigeria
  • 4.9K
  • 06 Nov 2025
Topic Review
You're Either with Us, or Against Us
In political communication, the phrase "you're either with us, or against us" and similar variations are used to depict situations as being polarized and to force witnesses, bystanders, or others unaligned with some form of pre-existing conflict to either become allies of the speaking party or lose favor. The implied consequence of not joining the team effort is to be deemed an enemy. An example is the statement of the former US President George W. Bush, who said after 9/11 at the launch of his anti-terrorism campaign in the form "Every nation, in every region, now has a decision to make. Either you are with us, or you are with the terrorists."
  • 4.9K
  • 23 Nov 2022
Topic Review
Skeptical Movement
The skeptical movement (British spelling: sceptical movement) is a modern social movement based on the idea of scientific skepticism (also called rational skepticism). The movement has the goal of investigating claims made on fringe topics and determining whether they are supported by empirical research and are reproducible, as part of a methodological norm pursuing "the extension of certified knowledge". The process followed is sometimes referred to as skeptical inquiry. Roots of the movement date at least from the 19th century, when people started publicly raising questions regarding the unquestioned acceptance of claims about spiritism, of various widely-held superstitions, and of pseudoscience. Publications such as those of the Dutch Vereniging tegen de Kwakzalverij (1881) also targeted medical quackery. Using as a template the Belgian organization founded in 1949, Comité Para, Americans Paul Kurtz and Marcello Truzzi founded the Committee for the Scientific Investigation of Claims of the Paranormal (CSICOP), in Amherst, New York, in 1976. Now known as the Committee for Skeptical Inquiry (CSI), this organization has inspired others to form similar groups worldwide.
  • 4.9K
  • 15 Nov 2022
Topic Review
Chemistry and Biosynthesis of Melatonin
Melatonin is a ubiquitous indolamine, largely investigated for its key role in the regulation of several physiological processes in both animals and plants. In the last century, it was reported that this molecule may be produced in high concentrations by several species belonging to the plant kingdom and stored in specialized tissues. 
  • 4.9K
  • 29 Mar 2022
Topic Review
Intelligent Road Defects Detection Technology
Road defects are important factors affecting traffic safety. In order to improve the identification efficiency of road diseases and the pertinence of maintenance and management, intelligent detection technologies of road diseases have been developed. The problems of high cost and low efficiency of artificial inspection of road diseases are solved efficiently, and the quality of road construction is improved availably. This is not only the guarantee of highway quality but also the guarantee of people’s lives and safety.
  • 4.9K
  • 15 Jun 2022
Topic Review
Society for Worldwide Interbank Financial Telecommunication
The Society for Worldwide Interbank Financial Telecommunication (SWIFT), legally S.W.I.F.T. SCRL, provides a network that enables financial institutions worldwide to send and receive information about financial transactions in a secure, standardized and reliable environment. SWIFT also sells software and services to financial institutions, much of it for use on the SWIFTNet network, and ISO 9362 Business Identifier Codes (BICs, previously Bank Identifier Codes), popularly known as "SWIFT codes". As of 2018, around half of all high-value cross-border payments worldwide used the SWIFT network. (As of 2015), SWIFT linked more than 11,000 financial institutions in more than 200 countries and territories, who were exchanging an average of over 32 million messages per day (compared to an average of 2.4 million daily messages in 1995). SWIFT transports financial messages in a highly secure way but does not hold accounts for its members and does not perform any form of clearing or settlement. SWIFT does not facilitate funds transfer: rather, it sends payment orders, which must be settled by correspondent accounts that the institutions have with each other. Each financial institution, to exchange banking transactions, must have a banking relationship by either being a bank or affiliating itself with one (or more) so as to enjoy those particular business features. SWIFT has been criticized for its inefficiency, with the Financial Times observing in 2018 that transfers frequently "pass through multiple banks before reaching their final destination, making them time-consuming, costly and lacking transparency on how much money will arrive at the other end". SWIFT has introduced its own improved service, called "Global Payments Innovation" (GPI), stating that as of 2018 it had been adopted by 165 banks, and was completing half of its payments in under 30 minutes. SWIFT is a cooperative society under Belgian law owned by its member financial institutions with offices around the world. SWIFT's headquarters are in La Hulpe, Belgium, near Brussels. The main building was designed by Ricardo Bofill Taller de Arquitectura and completed in 1989. The chairman of SWIFT is Yawar Shah, originally from Pakistan , and its CEO, since July 2019, is Javier Pérez-Tasso, originally from Spain. SWIFT hosts an annual conference, called Sibos, specifically aimed at the financial services industry. SWIFT has at various times attracted controversy for enabling the US government to monitor and in some cases interfere with intra-European transactions. (See: U.S. government involvement.)
  • 4.9K
  • 25 Oct 2022
Topic Review
History of Neurology and Neurosurgery
The study of neurology and neurosurgery dates back to prehistoric times, but the academic disciplines did not begin until the 16th century. From an observational science they developed a systematic way of approaching the nervous system and possible interventions in neurological disease.
  • 4.9K
  • 14 Oct 2022
Topic Review
Mitochondrial Derived Peptides
Mitochondrial-derived peptides (MDPs) are translated peptides encoded by short open reading frames (sORFs) within known mitochondrial (mt) DNA genes.
  • 4.9K
  • 27 Oct 2022
Topic Review
Water Quality Monitoring
Monitoring water quality is an essential tool for the control of pollutants and pathogens that can cause damage to the environment and human health. However, water quality analysis is usually performed in laboratory environments, often with the use of high-cost equipment and qualified professionals. With the progress of nanotechnology and the advance in engineering materials, several studies have shown, in recent years, the development of technologies aimed at monitoring water quality, with the ability to reduce the costs of analysis and accelerate the achievement of results for management and decision-making.
  • 4.9K
  • 13 May 2022
Topic Review
Sulfate-Reducing Bacteria
Sulfate-reducing bacteria (SRB) are a group of anaerobic microorganisms that can be present in the environment and gastrointestinal tract as a part of the intestinal microbiome and can be involved in inflammatory bowel diseases (IBDs), including ulcerative colitis in the human and animals.
  • 4.9K
  • 07 Feb 2021
Topic Review
Urban Middle-Class
With the rapid urbanization, the emergence of a middle class is exerting its influence on the urban form and structure. A data-driven approach based on principal component analysis (PCA) has been used to define multidimensionally the middle class and its housing typology.
  • 4.9K
  • 22 Sep 2022
Topic Review Peer Reviewed
James I of Aragon (1213–1276)
James I, King of Aragon (1213–1276). He was the third king of the Crown of Aragon, which had come into existence through the union between Queen Petronila of Aragon (1157-1164) and the Count of Barcelona Ramon Berenguer IV (1137–1162). James I represents a milestone in the iconography of the Kings of Aragon, although this is due more to his successors’ promotion of him rather than to his own efforts. In order to organise and unify his dominions after the conquests of Mallorca and Valencia, he immersed himself in legal work that consolidated his legislative power whilst still allowing his territories to retain a certain degree of autonomy. He carried out an essential monetary reorganisation in which his coinage retained its obverse but altered its reverse according to the place of issue. He never succeeded in being crowned, although he featured the crown prominently in his stamps and seals and, on some coins, he added the term rex gratia Dei. In addition, he revived the sword as a royal insignia, having proclaimed the right of conquest as the basis of his sovereignty.
  • 4.9K
  • 13 Apr 2022
Topic Review
Triptycene Synthesis and Derivatization
Since the discovery of triptycenes, great progress has been made regarding their synthetic methodology and the understanding of inter- and intramolecular interactions that involve triptycenes. Several new synthetic approaches have been developed in the last few years, and progress has been made in the context of sterically congested triptycenes and regioselective synthesis of various derivatives.
  • 4.9K
  • 06 Jan 2022
Topic Review
Internet of Things Architectures and Applications
The Internet of Things (IoT) has changed the worldwide network of people, smart devices, intelligent things, data, and information as an emergent technology. IoT development is still in its early stages, and numerous interrelated challenges must be addressed. IoT is the unifying idea of embedding everything. The Internet of Things offers a huge opportunity to improve the world’s accessibility, integrity, availability, scalability, confidentiality, and interoperability. However, securing the Internet of Things is a difficult issue. The IoT aims to connect almost everything within the framework of a common infrastructure. This helps in controlling devices and, will allow device status to be updated everywhere and at any time. To develop technology via IoT, several critical scientific studies and inquiries have been carried out. However, many obstacles and problems remain to be tackled in order to reach IoT’s maximum potential. 
  • 4.9K
  • 18 Jan 2022
Topic Review
Cost-Effective Water Purification Method
Water scarcity is occurring due to the rapid increase in the global population, intense industrialization, stringent water quality standards, and negative climate change. Contamination with heavy metals (arsenic, iron, lead, mercury, chromium), microbes (Escherichia coli, Staphylococus), biological compounds, and other components (fluoride, cadmium) is widely encountered. Carbon based materials, including activated carbon, MWCNT. graphene, r-graphene, cabon dot and fullerene provides cost effective option for water purification. The specific surface area, strong sorption, fast kinetics and like, are properties of these carbon based materials responsible potential water treatment application. 
  • 4.9K
  • 12 Jan 2021
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