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Topic Review
The Use of Virtual Reality in Tourism Destinations
The role of new technologies in tourism is changing rapidly, leading to the development of customer relationships through the use of virtual reality in the marketing of tourist destinations. In addition to focusing on the influence of travel intentions that has prevailed in practice so far, the use of VR is expected to have an impact on the travel experience on the spot.
  • 1.9K
  • 08 Apr 2022
Topic Review
Adder (Electronics)
An adder, or summer, is a digital circuit that performs addition of numbers. In many computers and other kinds of processors adders are used in the arithmetic logic units (ALUs). They are also used in other parts of the processor, where they are used to calculate addresses, table indices, increment and decrement operators and similar operations. Although adders can be constructed for many number representations, such as binary-coded decimal or excess-3, the most common adders operate on binary numbers. In cases where two's complement or ones' complement is being used to represent negative numbers, it is trivial to modify an adder into an adder–subtractor. Other signed number representations require more logic around the basic adder.
  • 1.9K
  • 24 Nov 2022
Topic Review
Food Peptides for the Nutricosmetic Industry
Biopeptides are considered interesting for industrial application since they show numerous functional properties (e.g., anti-aging, antioxidant, anti-inflammatory, and antimicrobial properties) and technological properties (e.g., solubility, emulsifying, and foaming). Moreover, they have fewer side effects than synthetic drugs. Nevertheless, some challenges must be overcome before their administration via the oral route. The gastric, pancreatic, and small intestinal enzymes and acidic stomach conditions can affect their bioavailability and the levels that can reach the site of action. Some delivery systems have been studied to avoid these problems (e.g., microemulsions, liposomes, solid lipid particles). 
  • 1.9K
  • 31 Mar 2023
Topic Review
Poultry Litter
Poultry litter is a combination of aviary excreta and bedding materials such as wood shavings, sawdust, peanut hulls, shredded sugar cane, straw, or other dry, absorbent, uneaten feed, broken eggs, dead birds, bird feathers and low-cost organic material [1].
  • 1.9K
  • 27 Dec 2020
Topic Review
DataMelt
DataMelt (sometime termed DMelt) is a software program for scientific computation, data analysis and data visualization. The program is used for statistical data analysis, curve fitting, data-mining, machine learning, numeric computations and interactive scientific plotting in 2D and 3D. DataMelt is designed for scientists, engineers and students. DataMelt is multiplatform since it is written in Java, thus it runs on any operating system where the Java virtual machine can be installed. DataMelt also uses high-level programming languages, such as Jython, Apache Groovy, JRuby, but Java coding can also be used to call DataMelt numerical and graphical libraries. DataMelt is an attempt to create a data-analysis environment using open-source packages with a coherent user interface and tools competitive to commercial programs. The idea behind the project is to incorporate open-source mathematical and numerical software packages with GUI-type user interfaces into a coherent program in which the main user interface is based on short-named Java/Python classes. This was required to build an analysis environment using Java scripting concept. A typical example will be shown below. Scripts and Java code (in case of the Java programming) can be run either in a GUI editor of DataMelt or as batch programs. The graphical libraries of DataMelt can be used to create applets. All charts (or "Canvases") used for data representation can be embedded into Web browsers. DataMelt can be used for analysis of large numerical data volumes, data mining, statistical data analysis and mathematics are essential. The program can be used in natural sciences, engineering, modeling and analysis of financial markets. While the program falls into the category of open source software, it is not completely free for commercial usage (see below), no source code is available on the home page, and all documentation and even bug reporting requires "membership". The DataMelt project website is https://datamelt.org
  • 1.9K
  • 31 Mar 2025
Topic Review
Microneedle-mediated protein delivery
Microneedle (MN) patches, consisting of micro/miniature-sized needles, are a promising tool to perforate the stratum corneum and to release drugs and proteins into the dermis following a non-invasive route. 
  • 1.9K
  • 28 Oct 2020
Topic Review
Human Midbrain Dopamine Neurons
Human midbrain dopamine (DA) neurons are a heterogeneous group of cells that share a common neurotransmitter phenotype and are in close anatomical proximity but display different functions, sensitivity to degeneration, and axonal innervation targets. The A9 DA neuron subtype controls motor function and is primarily degenerated in Parkinson’s disease (PD), whereas A10 neurons are largely unaffected by the condition, and their dysfunction is associated with neuropsychiatric disorders. Currently, DA neurons can only be reliably classified on the basis of topographical features, including anatomical location in the midbrain and projection targets in the forebrain.
  • 1.9K
  • 22 Jun 2021
Topic Review
Magnet Motors in High Frequency
To increase the efficency of electric drives, the working frequencies are getting higher, bringing serious Electromagnetic Compatibility (EMC) problems, as well as insulation stress and higher bearing currents. Hence, it is important to have an electrical machine electrical equivalent circuit model to predict the electromagnetic interference levels. This review summarizes the current state of the art in electrical machine modeling and analysis in high frequency. The main analysis tools as Finite Element Methods, analytic and measurement-based tools are compared. Then,  different machine high-frequency models  are reported, detailing their individual features. Additionally, the influence of the machine design parameters in EMC behavior is outlined for future analysis. This is a short version of the full article.
  • 1.9K
  • 16 Jul 2021
Topic Review
Tocotrienols: Stroke and Myocardial Infarction
Although the current treatments for stroke and myocardial infarction contribute to an improvement in mortality rates, the consequences of reperfusion therapy have remained a challenge. Tocotrienols have been shown to exert beneficial effects on the brain and heart.  We retrieved articles from Scopus, MEDLINE and PubMed from inception to June 2021, and included any studies using tocotrienols as a treatment for cerebral or myocardial I/R injury therapy. Observational studies and review articles were excluded, and the risk of bias was conducted using a specific tool for animal study (SYRCLE). The data were analyzed qualitatively. Twelve articles met the eligibility criteria. Tocotrienols significantly improved the structural, functional, and biochemical parameters in both cerebral and myocardial I/R injury models. In contrast, oxidative stress, inflammation, and apoptosis were markedly attenuated by tocotrienol treatment. Limitations to the analysis included marked differences in animal models, disease inductions, forms of tocotrienols, and an unclear risk of bias in certain types of bias. However, tocotrienols have the potential to serve as a supplement for reducing the impact of reperfusion injury. 
  • 1.9K
  • 10 Sep 2021
Topic Review
London School of Economics Gaddafi Links
The affair of the LSE Libya Links refers to the various connections that existed between the London School of Economics and Political Science (LSE) and the Libyan government and its leader Muammar Gaddafi and his son Saif al-Islam Gaddafi. The NGO Gaddafi Foundation pledged to donate £1.5 million over five years to a research centre, LSE Global Governance, of which £300k were paid. In addition, LSE Enterprise established a contract worth £2.2 million to train Libyan officials. In 2008, the LSE granted a PhD degree to Saif al-Islam Gaddafi, the son of the Libyan leader, for a dissertation. Currently, allegations circulate that Gaddafi's thesis was ghost-written and/or plagiarised. In December 2010, Muammar Gaddafi addressed members of the School in a video link-up where he was addressed as "Brother Leader" and received an LSE cap previously given to Nelson Mandela. In connection with the civil uprising in Libya in February and March 2011, the links between LSE and the Gaddafi regime, and the conduct of individual members of LSE's staff, came increasingly to be questioned. As a result of the revelations, the LSE's Director, Sir Howard Davies, resigned on 3 March 2011, citing "errors of judgement". In a New York Times op-ed piece on 7 March 2011, Roger Cohen wrote, in reference to events that had transpired at the School, "It may be possible to sink to greater depths but right now I can't think how. ...The Arab Spring is also a Western Winter. ...How did we back, use and encourage the brutality of Arab dictators over so many years? To what degree did that cynical encouragement of despots foster the very jihadist rage Western societies sought to curb?"
  • 1.9K
  • 10 Oct 2022
Topic Review
Hydrogen Production via Chemical Looping Water-Splitting
Hydrogen is an important green energy source and chemical raw material for various industrial processes. The major technique of hydrogen production is steam methane reforming (SMR), which suffers from high energy penalties and enormous CO2 emissions. As an alternative, chemical looping water-splitting (CLWS) technology represents an energy-efficient and environmentally friendly method for hydrogen production. The key to CLWS lies in the selection of suitable oxygen carriers (OCs) that hold outstanding sintering resistance, structural reversibility, and capability to release lattice oxygen and deoxygenate the steam for hydrogen generation. 
  • 1.9K
  • 26 Apr 2023
Topic Review
AI for Addressing Algorithmic Bias in Job Hiring
More businesses are using artificial intelligence (AI) in curriculum vitae (CV) screening. While the move improves efficiency in the recruitment process, it is vulnerable to biases, which have adverse effects on organizations and the broader society. It recommends the need for collaboration between machines and humans to enhance the fairness of the hiring process. The results can help AI developers make algorithmic changes needed to enhance fairness in AI-driven tools. This will enable the development of ethical hiring tools, contributing to fairness in society.
  • 1.9K
  • 20 Feb 2024
Topic Review
Nebra Sky Disk
The Nebra sky disk is a bronze disk of around 30 centimetres (11 3⁄4 in) diameter and a weight of 2.2 kilograms (4.9 lb), having a blue-green patina and inlaid with gold symbols. These symbols are interpreted generally as the Sun or full moon, a lunar crescent, and stars (including a cluster of seven stars interpreted as the Pleiades). Two golden arcs along the sides, interpreted to mark the angle between the solstices, were added later. A final addition was another arc at the bottom surrounded with multiple strokes (of uncertain meaning, variously interpreted as a solar barge with numerous oars, the Milky Way, or a rainbow). The disk has been attributed to a site in present-day Germany near Nebra, Saxony-Anhalt, and was originally dated by archaeologists to c. 1600 BCE. Researchers initially suggested the disk is an artifact of the Bronze Age Unetice culture, although a later dating to the Iron Age has been proposed as well. If its Bronze Age dating is accurate, the Nebra sky disk features the oldest concrete depiction of the cosmos yet known from anywhere in the world. In June 2013 it was included in the UNESCO Memory of the World Register and termed "one of the most important archaeological finds of the twentieth century."
  • 1.9K
  • 23 Nov 2022
Topic Review
Zisman Plot
The Zisman plot the graphical method of the Zisman theory or the Zisman method for characterizing the wettability of a solid surface , named for the American chemist and geophysicist, William Albert Zisman (1905–1986). It is a prominent Sessile drop technique used for characterizing liquid-surface interactions based on the contact angle of a single drop of liquid sitting on the solid surface.
  • 1.9K
  • 24 Nov 2022
Topic Review
Comparison of On-demand Music Streaming Services
The following is a list of on-demand music streaming services. The services offer streaming of full-length content via the Internet as a part of their service, without the listener necessarily purchasing a file for download. This type of service is comparable to Internet radio. Many of these sites have advertising and offer non-free options in the style of an online music store. For a list of online music stores that provide a means of purchasing and downloading music as files of some sort, see: Comparison of online music stores. Many of both types of sites offer services similar to an online music database.
  • 1.9K
  • 17 Oct 2022
Topic Review
Population-Resources Dynamics
Dynamics of population and resources symmetries are investigated and a model of ecological interaction that fits with empirical behavior was obtained. It was observed how variables in these dynamics are in recurrence considering parameters such as time, frequency, iteration and interaction. Variables investigated are the consume, time and supply mechanics. Time series analysis of these variables indicated a possible phase space formation of the phenomena. The main conclusion leads to a nonlinear dynamics of the  ecological interactions of the organisms and resources symmetries.
  • 1.9K
  • 01 Nov 2020
Topic Review
Postbiotics
Postbiotics include any substance released by or produced through the metabolic activity of the microorganism, which exerts a beneficial effect on the host, directly or indirectly. As postbiotics do not contain live microorganisms, the risks associated with their intake are minimized. Postbiotics play a vital role in the maturation of the immune system, affect barrier tightness and the intestinal ecosystem, and indirectly shape the structure of the microbiota. Postbiotics display pleiotropic effects, including their immunomodulatory, anti-inflammatory, antioxidant, and anti-cancer properties. As such, postbiotics may be useful in treating or preventing many disease entities, including those for which effective causal therapy has not yet been found.
  • 1.9K
  • 05 Nov 2020
Topic Review
Plant Extracts as Natural Antioxidants in Meat
Plant extracts are rich in various bioactive compounds exerting antioxidants effects, such as phenolics, catechins, flavonoids, quercetin, anthocyanin, tocopherol, rutin, chlorogenic acid, lycopene, caffeic acid, ferulic acid, p-coumaric acid, vitamin C, protocatechuic acid, vitamin E, carotenoids, β-carotene, myricetin, kaempferol, carnosine, zeaxanthin, sesamol, rosmarinic acid, carnosic acid, and carnosol.
  • 1.9K
  • 19 Nov 2021
Topic Review
Breast Cancer Subtype-Specific miRNAs
Breast cancer is one of the most common malignancies, with multiple subtypes, based on clinical parameters and molecular profiling. In addition to disease staging, the expression status of hormone receptors’ estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) in tumors define the prognosis of the cancer and treatment options. Hence, clinically, breast cancers are defined as ER+/PR+, HER+, or triple-negative (i.e., those lacking expression of these three receptors). This classification system allows for the administration of endocrine therapies in the hormone expressing subtypes. Additionally, breast cancer subtyping is observed via transcriptome profiling, which has identified four major subtypes (luminal A, luminal B, HER2, and basal-like). The ER+/PR+ breast cancers are predominately luminal A/B and TNBCs are predominately basal-like. Clearly gene expression defines breast cancer; it is then not surprising that the expression of miRNAs also displays subtype-specificity.
  • 1.9K
  • 25 Mar 2022
Topic Review
Venus Flytrap (Dionaea muscipula)
The Venus flytrap (Dionaea muscipula) is one of the most iconic carnivorous plants known for its rapid leaf movement and unique insect-trapping mechanism. Native to nutrient-poor bogs in the southeastern United States, D. muscipula has evolved complex morphological, physiological, and ecological adaptations that facilitate carnivory. This entry provides a comprehensive academic overview of the Venus flytrap, encompassing its taxonomy, habitat, trapping mechanism, digestive physiology, reproductive biology, genetic underpinnings, ecological role, conservation status, and evolutionary significance.
  • 1.9K
  • 04 Jun 2025
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