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Topic Review
Multi-Exposure Image Fusion Techniques
Multi-exposure image fusion (MEF) can integrate images with multiple exposure levels into a full exposure image of high quality. It is an economical and effective way to improve the dynamic range of the imaging system and has broad application prospects.
  • 2.3K
  • 24 Feb 2022
Topic Review
Lifestyle
In the realm of social science, lifestyle encompasses the array of behaviors, habits, values, and preferences that characterize an individual or a group within a specific cultural and social context. It serves as a central concept for sociological analysis, providing insights into the ways individuals construct and express their identities, engage with societal norms, and navigate the intricate web of social relationships. The study of lifestyle in social science sheds light on the reciprocal influence between personal choices and broader societal structures, contributing to a nuanced understanding of human behavior within the fabric of society.
  • 2.3K
  • 25 Jan 2024
Topic Review
Synthesis of Variolins, Meridianins, and Meriolins
Marine natural products are a source of essential significance due to a plethora of highly diverse biological properties. The naturally occurring (aza)indole alkaloids variolin B (1), meridianins (2), and their synthetic hybrids meriolins (3) exhibit potent kinase inhibitory activities.
  • 2.3K
  • 06 Feb 2023
Topic Review
Verrucomicrobia
Verrucomicrobia is a phylum of Gram-negative bacteria that contains only a few described species. The species identified have been isolated from fresh water, marine and soil environments and human faeces. A number of as-yet uncultivated species have been identified in association with eukaryotic hosts including extrusive explosive ectosymbionts of protists and endosymbionts of nematodes residing in their gametes. Verrucomicrobia are abundant within the environment, though relatively inactive. This phylum is considered to have two sister phyla: Chlamydiae and Lentisphaerae within the PVC group. The Verrucomicrobia phylum can be distinguished from neighbouring phyla within the PVC group by the presence of several conserved signature indels (CSIs). These CSIs represent unique, synapomorphic characteristics that suggest common ancestry within Verrucomicrobia and an independent lineage amidst other bacteria. CSIs have also been found that are shared by Verrucomicrobia and Chlamydiae exclusively of all other bacteria. These CSIs provide evidence that Chlamydiae is the closest relative to Verrucomicrobia, and that they are more closely related to one another than to the Planctomycetales. Verrucomicrobia might belong in the clade Planctobacteria in the larger clade Gracilicutes. In 2008, the whole genome of Methylacidiphilum infernorum (2.3 Mbp) was published. On the single circular chromosome, 2473 predicted proteins were found, 731 of which had no detectable homologs. These analyses also revealed many possible homologies with Proteobacteria.
  • 2.3K
  • 21 Oct 2022
Topic Review
Variobahn
The Variobahn, formerly known as the Variotram, is a German-designed model of articulated low-floor tram and light rail vehicle. Since its introduction in 1993, the Variobahn has been manufactured variously by ABB, Adtranz, Bombardier Transportation, and since 2001 by Stadler Rail. As of 2009, 254 trams have been ordered, with an additional 110 on option. A unit costs about €2.5 million. Operators include the Graz Holding, the Bergen Light Rail, the Chemnitz Tramway, Verkehrsverbund Rhein-Ruhr, the Helsinki Tramway, the Rhine Neckar Area Tramway and London Tramlink.
  • 2.3K
  • 09 Nov 2022
Topic Review
Life Satisfaction in New Zealand
One of the three measures of subjective wellbeing used in New Zealand' s Living Standards Framework is life satisfaction. Life satisfaction, or ‘satisfaction with life’, has been defined as a cognitive evaluation of overall satisfaction with an individual’s current life, relative to the individual’s own criteria of what a satisfactory life is. Life satisfaction is widely regarded as a key measure of subjective wellbeing. Prevalence and predictors of life satisfaction in New Zealand (NZ) from a sample of 10,799 participants from NZ, drawn from the Gallup World Poll from 2006 to 2017 are investigated. Prevalence of life satisfaction across time varied little, satisfaction with standards of living predicted life satisfaction regardless of age or gender, and for males across all age groups and females up to age 40 years, positive experiences and satisfaction with household income were important predictors. Being married was an important predictor for males over 40 years and feeling satisfied with their current city was important for females across all ages and for men under 40.
  • 2.3K
  • 13 Jun 2022
Topic Review
Forensic Geology
Forensic geology is the study of evidence relating to minerals, oil, petroleum, and other materials found in the Earth, used to answer questions raised by the legal system. In 1975, Ray Murray and fellow Rutgers University professor John Tedrow published Forensic Geology. The main use of forensic geology as it is applied today is regarding trace evidence. By examining the soil and sediment particules to be able to link a suspect to a particular crime or a particular scene. Other uses in this field of science can include theft, fraud, locating a gravesite etc. It requires the aid of many other disciplines of science such as medicine, biology, geography, engineering and many others. More recently, in 2008, Alastair Ruffell and Jennifer McKinley, both of Queen's University Belfast, published Geoforensics a book that focuses more on the use of geomorphology and geophysics for searches. In 2010, forensic soil scientist Lorna Dawson of the James Hutton Institute co-edited and contributed chapters to the textbook Criminal and Environmental Soil Forensics. In 2012, Elisa Bergslien, at SUNY Buffalo State, published a general textbook on the topic, An Introduction to Forensic Geoscience.
  • 2.3K
  • 16 Nov 2022
Topic Review
Figures of Merit for Photodetectors
Photodetector are devices used to convert light signals into electrical signals and have a wide range of applications in optical communication, imaging and industrial security. With the emergency of new materials, new kinds of photodetectors are developed, such as van der Waals heterojunction photodetectors. In order to assess the performance of photodetectors, several key parameters are introduced.
  • 2.3K
  • 09 Oct 2023
Topic Review
Polyvinyl Chloride in the Environment
Plastics have recently become an indispensable part of everyone’s daily life due to their versatility, durability, light weight, and low production costs. The increasing production and use of plastics poses great environmental problems due to their incomplete utilization, a very long period of biodegradation, and a negative impact on living organisms. Decomposing plastics lead to the formation of microplastics, which accumulate in the environment and living organisms, becoming part of the food chain. The contamination of soils and water with poly(vinyl chloride) (PVC) seriously threatens ecosystems around the world. Their durability and low weight make microplastic particles easily transported through water or air, ending up in the soil.
  • 2.3K
  • 12 Jan 2024
Topic Review
Cold-Tolerant Microbes
Cold adapted microorganisms represent a large fraction of biomass on earth due to the dominance of low temperature environments. Himalaya is one of the most important low temperature environments on Earth because it possess environmental similarities to Polar Regions. The extreme cold environments of Himalaya are mainly dependent on the tiny life forms because of climatic restrictions to higher plants and animals. These cold loving microbes are known to possess several structural and functional adaptations in order to perform various life processes under the stressful low temperature environments. Their biological activities maintain the nutrient flux in environment and contribute in the global biogeochemical cycles. The culture dependent and culture independent studies revealed their diversity in community structure and functional potential. Apart from the ecological importance, these microorganisms have been recognized as a source of cold active enzymes and novel bioactive compounds. These products have several applications in biotechnological industries. 
  • 2.3K
  • 27 Oct 2020
Topic Review
Acrylamide in Bakery Products
Acrylamide is a contaminant as defined in Council Regulation (EEC) No 315/93 and as such, it is considered a chemical hazard in the food chain. The toxicity of acrylamide has been acknowledged since 2002, among its toxicological effects on humans being neurotoxicity, genotoxicity, carcinogenicity, and reproductive toxicity. Acrylamide has been classified as carcinogenic in the 2A group, with human exposure leading to progressive degeneration of the peripheral and central nervous systems characterized by cognitive and motor abnormalities. Bakery products (bread, crispbread, cakes, batter, breakfast cereals, biscuits, pies, etc.) are some of the major sources of dietary acrylamide.
  • 2.3K
  • 21 May 2021
Topic Review
Plant Secondary Metabolite in stress
Plant secondary metabolites (SMs) play important roles in plant survival and in creating ecological connections between other species. The accumulation of SMs are highly dependent on environmental factors such as light, temperature, soil water, soil fertility, and salinity. For most plants, a change in an individual environmental factor can alter the content of secondary metabolites even if other factors remain constant. In this review, we focus on how individual environmental factors affect the accumulation of secondary metabolites in plants during both biotic and abiotic stress conditions. Furthermore, we discuss the application of abiotic and biotic elicitors in culture systems as well as their stimulating effects on the accumulation of secondary metabolites. Genes responsible for secondary metabolite biosynthesis in various plant species during stress conditions are regulated by transcriptional factors such as WRKY, MYB, AP2/ERF, bZIP, bHLH, and NAC, which are also discussed here.
  • 2.3K
  • 28 May 2021
Topic Review
Nest Learning Thermostat
The Nest Learning Thermostat (or Nest Thermostat) is a smart thermostat developed by Nest Labs and designed by Tony Fadell, Ben Filson, and Fred Bould. It is an electronic, programmable, and self-learning Wi-Fi-enabled thermostat that optimizes heating and cooling of homes and businesses to conserve energy. The device is based on a machine learning algorithm: for the first weeks users have to regulate the thermostat in order to provide the reference data set. The thermostat can then learn people's schedule, at which temperature they are used to and when. Using built-in sensors and phones' locations, it can shift into energy saving mode when it realizes nobody is at home.
  • 2.3K
  • 07 Oct 2022
Topic Review
Boron Essentiality in Humans and Animals
Boron (B) is considered a prebiotic chemical element with a role in both the origin and evolution of life, as well as an essential micronutrient for some bacteria, plants, fungi, and algae. B has beneficial effects on the biological functions of humans and animals, such as reproduction, growth, calcium metabolism, bone formation, energy metabolism, immunity, and brain function. Naturally organic B (NOB) species may become promising novel prebiotic candidates. NOB-containing compounds have been shown to be essential for the symbiosis between organisms from different kingdoms. New insights into the key role of NOB species in the symbiosis between human/animal hosts and their microbiota will influence the use of natural B-based colon-targeting nutraceuticals. The mechanism of action (MoA) of NOB species is related to the B signaling molecule (autoinducer-2-borate (AI-2B)) as well as the fortification of the colonic mucus gel layer with NOB species from B-rich prebiotic diets. Both the microbiota and the colonic mucus gel layer can become NOB targets. The evidence supporting the essentiality of the NOB species in the symbiosis between the microbiota and the human/animal hosts is reviewed, with the stated aim of highlighting the MoA and targets of these species.
  • 2.3K
  • 13 Sep 2022
Topic Review
β-glucosidases
β-glucosidases (EC. 3.2.1.21) are enzymes that hydrolyze glucosidic bonds of oligosaccharides, in special disaccharides, such as cellobiose, realizing glucose at the end of the process. They are highly used in second-generation biofuel production. 
  • 2.3K
  • 29 Jan 2024
Topic Review
Technology Solutions for Circular Economy
The concept of circular economy (CE) is becoming progressively popular with academia, industry, and policymakers, as a potential path towards a more sustainable economic system. CE comes as an alternative to the linear economy model, embracing and incorporating a series of ideas in various so-called “R” frameworks (e.g. “reduce”, “reuse”, and “recycle”). Information and communication technology (ICT) systems have influenced every aspect of modern life and the CE is no exception. Cutting-edge technologies, such as big data, cloud computing, cyber-physical systems, internet of things, virtual and augmented reality, and blockchain, can play an integral role in the embracing of CE concepts and the rollout of CE programs by governments, organizations, and society as a whole. There are many ICT solutions found in the literature, which can pave the way towards a CE. The categorization of these solutions can be done either from a technological perspective (e.g., communications, computing, data analysis, etc.), or from the viewpoint of the main CE concept(s) (i.e., reduce, reuse, recycle and restore) that each solution is most relevant to. ICT solutions related to data collection and data analysis, and in particular to the Internet of Things, blockchain, digital platforms, artificial intelligence algorithms, and software tools, are amongst the most popular solutions proposed by academic researchers. Also, greater emphasis is placed on the “reduce” component of the CE, although ICT solutions for the other “R” components, as well as holistic ICT-based solutions, do exist as well. Specific important challenges impeding the adoption of ICT solutions for the CE also exist, especially related to consumer and business attitude, economic costs, possible environmental impacts, lack of education around the CE, and lack of familiarization with modern technologies being found among the most prominent ones.
  • 2.3K
  • 20 Nov 2020
Topic Review
m6A Demethylases Inhibitors
N6-methyladenosine (m6A) is a post-transcriptional RNA modification and one of the most abundant types of RNA chemical modifications. m6A functions as a molecular switch and is involved in a range of biomedical aspects, including cardiovascular diseases, the central nervous system, and cancers.
  • 2.3K
  • 06 Jun 2022
Topic Review
Applications of IRS-Assisted UAV Communication
A intelligent reflecting surface (IRS) can intelligently configure wavefronts such as amplitude, frequency, phase, and even polarization through passive reflections and without requiring any radio frequency (RF) chains. It is predicted to be a revolutionizing technology with the capability to alter wireless communication to enhance both spectrum and energy efficiencies with low expenditure and low energy consumption. Similarly, unmanned aerial vehicle (UAV) communication has attained a significant interest by research fraternity due to high mobility, flexible deployment, and easy integration with other technologies. IRS and UAV can combine together to achieve unparalleled opportunities in difficult environments. Both technologies can achieve enhanced performance by proactively altering the wireless propagation through maneuver control and smart signal reflections in three-dimensional space. 
  • 2.3K
  • 18 Jul 2022
Topic Review
Schiaparelli EDM Lander
Schiaparelli EDM lander [skjapaˈɾɛlːi] was the Entry, Descent and Landing Demonstrator Module (EDM) of the ExoMars programme—a joint mission of the European Space Agency (ESA) and the Russian space agency Roscosmos. It was built in Italy and was intended to test technology for future soft landings on the surface of Mars. It also had a limited but focused science payload that would have measured atmospheric electricity on Mars and local meteorological conditions. Launched together with the ExoMars Trace Gas Orbiter (TGO) on 14 March 2016, Schiaparelli attempted a landing on 19 October 2016. Telemetry signals from Schiaparelli, monitored in real time by the Giant Metrewave Radio Telescope in India (and confirmed by Mars Express), were lost about one minute from the surface during the final landing stages. On 21 October 2016, NASA released an image by the Mars Reconnaissance Orbiter showing what appears to be the lander's crash site. The telemetry data accumulated by the TGO and ESA's Mars Express orbiters are being used to investigate the failure modes of the landing technology employed.
  • 2.3K
  • 04 Oct 2022
Topic Review
Children’s Drawings and People’s Subjective Well-Being
Applying the thinking and visual characteristics of children's paintings in artwork can stimulate people's happiness, inspire artists, and arouse the public’s happiness by visual means.  
  • 2.3K
  • 30 Dec 2022
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