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Topic Review
Callose
Callose is a β-(1,3)-D-glucan polysaccharide with some β-1,6-branches that exists in all multicellular green algae and higher plants.
  • 2.6K
  • 27 Apr 2021
Topic Review
Coal Bottom Ash
Coal bottom ash (CBA) is physically similar to natural aggregates and resembles Portland cement (PC) when pulverized into finer particles.
  • 2.6K
  • 01 Dec 2021
Topic Review
Comand APS
Cockpit Management and Data system - COMAND for short - acts as a combined command and control centre for all audio, telematics and telecommunications functions on Mercedes-Benz vehicles and includes a dedicated flat display screen. In addition to the GPS navigation system and general processing and control logic, COMAND includes components such as an address book, telephone, radio and in many cases a CD/DVD drive. It is connected to other (often separate) devices such as CD/DVD changers, sound system and surround sound amplifier, TV receiver and the optional Linguatronic voice control system via an optical fibre network. The first generations of COMAND used the D2B optical network standard whereas later models are based on MOST. A key feature of all COMAND systems is to provide deep integration between the various functions such as multimedia, navigation and telephony and to also allow multiple presentation and control facilities. An example of functional integration is where other audio sources can be muted when a phone call comes in or when navigation guidance is being given. It is also the case that the main audio system, speakers and microphone are used for all these functions instead of being logically and functionally separate. With regard to multiple presentation and control facilities, COMAND based vehicles allow steering wheel controls to be used alongside the main COMAND buttons and controller and COMAND related status information and instructions can be displayed in the instrument cluster in addition to the main COMAND display. On vehicles with a factory fitted Mercedes-Benz rear seat entertainment system, this also provides integration with the COMAND system, allowing for instance the rear seat displays to show content from the COMAND TV receiver or to play out the rear DVD audio over the car's surround sound system. On newer S-Class and CL-Class models such as the W221, the integration between COMAND and other vehicle functions is even more complete, including access via COMAND to the HVAC system, seat controls, etc. On these cars, in contrast to most other Mercedes-Benz vehicles, COMAND is part of the standard specification rather than an optional extra. COMAND was introduced first exclusively on the flagship S-Class and CL-Class models. Later, it became available on other Mercedes cars too.
  • 2.6K
  • 09 Oct 2022
Topic Review
Electromagnetic Vibrational Energy Harvesting Principles
As industries need more real-time monitoring and interconnected systems, the demand for wireless sensors expands. Vibrational energy harvesters are a potential solution for powering these sensors, as vibrations commonly exist where monitoring occurs. Developments in low-power circuitry have also led to the feasibility of these types of harvesters. Electromagnetic harvesters are a standout among various types of vibrational harvesters due to their ability to capture kinetic energy in a low-frequency range. This leads to these devices being more applicable in real-world applications where ambient vibrations are typical of having low frequencies.
  • 2.6K
  • 04 Aug 2022
Topic Review
Marrano
Marranos were Jews living in the Iberian Peninsula who converted or were forced to convert to Christianity during the Middle Ages, yet continued to practice Judaism in secret. The term specifically refers to the charge of Crypto-Judaism, whereas the term converso was used for the wider population of Jewish converts to Catholicism, whether or not they secretly still practised Jewish rites. Converts from either Judaism or Islam were referred to by the broader term of "New Christians". The term "marrano" came into later use in 1492 with the Castilian Alhambra Decree; it prohibited the practice of Judaism in Spain and required all remaining Jews to convert or leave. By then, the large majority of Jews in Spain had converted to Catholicism, and conversos numbered hundreds of thousands. They were closely monitored by the Spanish Inquisition and subject to suspicions by Catholics of the secret practice of Judaism, also known as "Marranism". In modern use "marrano" is sometimes, but not always, considered offensive; and "crypto-Jew" is occasionally preferred in scholarly works.
  • 2.6K
  • 28 Nov 2022
Topic Review
Risk Factors in Business Valuation
It is widely accepted that risk and uncertainty are integral parts of the property valuation process. Uncertainty in property valuation is derived from the characteristics of property itself. The issue pertaining to risk and uncertainty in property valuations is currently one of the key concerns in global valuation practice to date in addressing the decision of risk and uncertainty in valuation, especially for business purposes or in the current term known as business valuation. The judgment and experience still depend on the expertise of the individual valuers alone.
  • 2.6K
  • 01 Mar 2023
Topic Review
The Interband Cascade Laser
The interband cascade laser (ICL) has recently become the go-to coherent optical source for applications in the mid-wave infrared spectral band (especially 3–6 μm) that require high efficiency, low drive power, and small system footprint. The ICL combines a relatively long upper-level lifetime, characteristic of semiconductor interband transitions, with the voltage-efficient cascading scheme originally introduced for the quantum cascade laser (which employs intersubband transitions to produce light). Following the first room-temperature (RT) continuous wave (cw) operation in 2008, ICLs have operated in cw mode up to 118 ºC, produced > 500 mW of cw power at RT, displayed wallplug efficiencies up to 18% for RT cw operation, and operated in cw mode at RT to wavelengths as long as 6 µm. The low ICL drive power, which is 1-2 orders of magnitude less than is required for a quantum cascade laser (QCL), is especially important in applications such as portable battery- or solar-powered laser spectroscopy systems that require a small footprint. Distributed-feedback (DFB) ICLs emitting in a single spectral mode have generated up to 55 mW of cw power at RT, and have operated at wavelengths as long as 6.6 µm. Newer device classes include ICL frequency combs, interband cascade vertical-cavity surface-emitting lasers, interband cascade LEDs, interband cascade detectors, and ICLs incorporated into photonic integrated circuits.
  • 2.6K
  • 22 Sep 2020
Topic Review
Omega-3 and Omega-6 Fatty Acids
Omega-3 fatty acids v(ω-3 FAs) such as EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) and omega-6 fatty acids (ω-6 FAs) such as linoleic acid and arachidonic acid are important fatty acids responsible for positive effects on human health. The main sources of ω-3 FAs and ω-6 FAs are marine-based products, especially fish oils.
  • 2.6K
  • 25 Jul 2023
Topic Review
Fruit by-Products
Fruit by-Products deals with the bioactive compounds present in the by-products generated by the fruit processing industry with large amounts. These bioactive compounds are mainly dietary fibres, phenolic compounds, proteins and lipids. They have significant chemical, physical and biological properties which make fruits by-products a good source for new supplements in food products having important effect on intestinal function. 
  • 2.6K
  • 03 Dec 2020
Topic Review
Measuring Overtourism
The tourism debate prior to the COVID-19 pandemic was dominated by the problems inherent in overtourism, reflecting an inadequate land management. Although publications on overtourism have grown exponentially in recent years, its scientific study still has major shortcomings, particularly with regard to measurement. With the aim of overcoming this insufficiency, we have carried out a review of the literature (using the mapping review method) and, based on its conclusions, we have drawn up a proposal to systematise the measurement of overtourism by combining several tools: indicators, surveys, interviews, and other tools linked to the Internet and social networks. The results of the research make a contribution to the expansion of the literature on the topic and may have important practical implications in formulating effective land-use policies by guiding policy makers in the management of overtourism. They could be of use in both the early detection of overtourism and the design of policies that prevent and/or detect situations of risk and that correct existing problems. This is especially relevant in the current international context to implement the effective transition to a responsible tourism model post-COVID-19.
  • 2.6K
  • 06 Sep 2021
Topic Review
Grasshopper (Rocket)
Grasshopper and the Falcon 9 Reusable Development Vehicles (F9R Dev) were experimental flight test reusable rockets that performed vertical takeoffs and landings. The project was privately funded by SpaceX, with no funds provided by any government until later on. Two prototypes were built, and both were launched from the ground. Grasshopper was announced in 2011 and began low-altitude, low-velocity hover/landing testing in 2012. The initial Grasshopper test vehicle was 106 ft (32 m) tall and made eight successful test flights in 2012 and 2013 before being retired. A second Grasshopper-class prototype was the larger and more capable Falcon 9 Reusable Development Vehicle (F9R Dev, also known as F9R Dev1) based on the Falcon 9 v1.1 launch vehicle. It was tested at higher altitudes and was capable of much higher velocity but was never tested at high velocity. The F9R Dev1 vehicle was built in 2013–2014 and made its first low-altitude flight test on 17 April 2014; it was lost during a three-engine test at the McGregor test site on 22 August 2014, which ended the low-velocity test program. Further expansion of the flight test envelope for the reusable rocket was moved to descending Falcon 9 boosters that had been used on orbital flight trajectories on commercial orbital flights of the Falcon 9. The Grasshopper and F9R Dev tests were fundamental to the development of the reusable Falcon 9 and Falcon Heavy rockets, which require vertical landings of the near-empty Falcon 9 and Falcon Heavy first-stage booster tanks and engine assemblies. The Grasshopper and the F9R Dev tests led into a series of high-altitude, high-speed controlled-descent tests of post-mission (spent) Falcon 9 booster stages that accompanied the commercial Falcon 9 missions since September 2013. The latter eventually resulted in the first successful booster landing on 21 December 2015.
  • 2.6K
  • 16 Nov 2022
Topic Review
Postbiotics in Skin Conditions
The skin microbiome is composed of a complex association of bacteria, fungi, and viruses. The maintenance of skin commensal microbes is essential for preventing the overgrowth of pathogenic microorganisms or already present opportunistic pathogens. Thus, the development of bioactive compounds capable of modulating skin microbiome has become an important topic for both researchers and the cosmetic industry. Increasingly, scientific evidence highlights that metabolites derived from probiotics have a great potential to prevent diseases affecting the skin. These compounds have recently been called postbiotics and are defined as a “preparation of inanimate microorganisms and/or their components that confers a health benefit on the host”. Postbiotics are obtained from fermentations performed almost exclusively by lactic acid bacteria and yeast. Short-chain fatty acids, bacteriocins, and organic acids are some examples of postbiotics. These compounds exhibit antimicrobial, immunomodulatory, antioxidant, and anti-inflammatory activities. In addition, postbiotic production possesses technological advantages, including high stability and increased safety, compared to viable probiotics.
  • 2.6K
  • 22 Mar 2023
Topic Review
Volatile Organic Compounds
Volatile organic compounds (VOCs) are promising alternatives to synthetic pesticides in pest and disease management. VOCs are gaining interest due to the various advantages of their application, such as the reduction in residuals in the environment and their ease of application in different agricultural systems. 
  • 2.6K
  • 18 Apr 2023
Topic Review
Bio-Coatings Methods for Fruits and Vegetables Preservation
Consuming fresh food is undoubtedly the best way to enjoy various flavors and nutrients, but their preservation helps to enjoy all these even out of season. Bio-coating technologies hold great promise for the future of food preservation, offering a more sustainable and healthy way to keep fruits and vegetables fresh for more extended periods. The choice of a coating method may depend on the type of fresh fruits and vegetables, the coating material, and the desired coating thickness. The application method should be carried out under hygienic conditions to prevent contamination and ensure the effectiveness of the coating. It is also essential to apply the coating evenly and that it adheres properly to the surface of the produce, maximizing its effectiveness. The coating material can be applied in its pure form or mixed with other ingredients such as antioxidants, preservatives, or antimicrobial agents, thus enhancing its effectiveness.
  • 2.6K
  • 16 Aug 2023
Topic Review
Fatty Liver Disease in Dairy Cows
Frequently occurring fatty liver disease in dairy cows during the perinatal period, a typical type of non-alcoholic fatty liver disease (NAFLD), results in worldwide high culling rates of dairy cows (averagely about 25%) after calving. This has been developing into a critical industrial problem throughout the world, because the metabolic disease severely affects the welfare and economic value of dairy cows. Understanding the mechanisms of the pathogenesis of fatty liver disease will further enhance our understanding of fatty liver disease in human beings and animals, developing safer and effective therapeutics to prevent and/or treat the disease, also providing essential clues in breeding improvement of fatty liver disease-resistant dairy cattle, eventually contributing to sustainable development of dairy industry.
  • 2.6K
  • 01 Nov 2020
Topic Review
Electrochromic Windows in Buildings
Electrochromic systems for smart windows make it possible to enhance energy efficiency in the construction sector. The dynamic modulation of the spectral properties of a glazing, within the visible and infrared ranges of wavelengths, allows smart adaptation of thermal and optical figures of merit of a glazing, according to the everchanging conditions of the external environment. This allows appropriate control of the daylighting penetration within the building. The consequent advantages are manifold and are still being explored in the scientific literature. The reduction in energy consumption for summer air conditioning (and artificial lighting, too) becomes significant, especially in “cooling dominated” climates, reaching high percentages of saving, compared to common transparent windows; on the other hand, the continuous adaptation of the optical properties of the glass to the changing external conditions makes it possible to set suitable management strategies for the smart window, event in cold climates, in order to reduce glare and other discomfort issues. 
  • 2.6K
  • 27 Oct 2020
Topic Review
Plant-Based Diet
In recent decades, the food industry has been faced with new challenges and it has had to develop new types of diets and produce new types of foods that can slow down the spread of chronic diseases. The aim of our research is to identify the characteristics of plant-based nutrition based on international and Hungarian literature. The comprehensive analysis has been performed based on the theoretical model called Theory of Planned Behavior, in the course of which the perceived and objective benefits of and barriers to the conversion to a plant-based diet have been examined. According to our results, the main benefits of plant-based nutrition are its many factors associated with a reduction in risk of developing numerous chronic diseases. This is followed by benefits of well-being and satisfaction, followed by ethical and environmental benefits. The most commonly reported inhibitory factor of a vegetarian diet is the enjoyment of eating meat and the difficulty in giving up meat consumption. This is followed by health considerations, e.g., lack of various ingredients in foods. Convenience and taste factors are also important disincentives as well as the irrelevant nature of some plant-based nutrition information sources. Besides, social barriers, negative discrimination and negative effect of mental health associated with them can also be a hindrance, as can financial barriers. The classification developed during our analysis can serve as a relevant guideline for decision-makers, and also as a basis for further primary qualitative and quantitative research.
  • 2.6K
  • 27 Oct 2020
Topic Review
AxBy Intermetallics for hydrogen storage
AxBy intermetallics show outstanding performances, notably for stationary hydrogen storage applications. Elemental substitution, whether on the A or B site of these alloys, allows the effective tailoring of key properties such as gravimetric density, equilibrium pressure, hysteresis and cyclic stability for instance.
  • 2.6K
  • 01 Feb 2021
Topic Review
Anatomical-MRI Correlations in Hypertrophic Cardiomyopathy Adults and Children
Hypertrophic Cardiomyopathy (HCM) is the most frequent hereditary cardiovascular disease and the leading cause of sudden cardiac death in young individuals. Advancements in CMR imaging have allowed for earlier identification and more accurate prognosis of HCM. CMR has been validated as a technique with high sensitivity and specificity, very few contraindications, a low risk of side effects, and is overall a good tool to be employed in the management of HCM patients.
  • 2.6K
  • 11 Mar 2022
Topic Review
Public Order Act 1986
The Public Order Act 1986 (c 64) is an Act of the Parliament of the United Kingdom. It creates a number of public order offences. They replace similar common law offences and parts of the Public Order Act 1936. It implements recommendations of the Law Commission.
  • 2.6K
  • 25 Oct 2022
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