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Topic Review
Non-Enzymatic Electrochemical Sensing
Simultaneous detection of analytes that together exist in biological organisms necessitates the development of effective and efficient non enzymatic electrodes in sensing. In this regard, development of sensing elements for detecting glucose and hydrogen peroxide (H2O2) is significant. The non-enzymatic sensing is more economical and has longer lifetime than enzymatic electrochemical sensing, but it has several drawbacks such as high working potential, slow electrode kinetics, poisoning from intermediate species and weak sensing parameters. Here is a comprehensive overview of the recent developments in non-enzymatic glucose and H2O2 (NEGH) sensing, by focusing mainly on sensing performance, electro catalytic mechanism, morphology and design of electrode materials. A comparison of glucose and H2O2 sensing parameters using same electrode materials is outlined to predict the efficient sensing performances of advanced nanomaterials with metal/metal oxides and hybrid metallic nanocomposites.
  • 3.0K
  • 24 Nov 2020
Topic Review
Cat Body-type Mutation
Cats, like all living organisms, occasionally have mutations that affect their body type. Sometimes, these cat body-type mutations are striking enough that humans select for and perpetuate them. This is not always in the best interests of the cat, as many of these mutations are harmful; some are even lethal in their homozygous form. This article gives a selection of cat body type mutant alleles and the associated mutations with a brief description.
  • 3.0K
  • 29 Sep 2022
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
Convolutional Neural Network + Recurrent Neural Network
A convolutional neural network and recurrent neural network (CNN + RNN) combination is an effective approach for many modern image recognition tasks that need to identify the behaviour of objects through a sequence of frames. For example, in a security CCTV camera footage, want to identify what abnormal actions a character is doing in the scene (e.g. fighting with someone, breaking into a store, etc.). A deep convolutional neural network (e.g. ResNet50) has many layers of abstraction and is good for extracting essential features in each frame of the input stream. These extracted features, which may represent low-level image features or even high-level objects, can be monitored over a sequence of frames by a recurrent neural network (e.g. ConvLSTM) so as to detect whether a certain action or event has happened.
  • 3.0K
  • 23 Feb 2022
Topic Review
N-back
The n-back task is a continuous performance task that is commonly used as an assessment in psychology and cognitive neuroscience to measure a part of working memory and working memory capacity. The n-back was introduced by Wayne Kirchner in 1958. Some researchers have argued that n-back training may increase IQ, but evidence is mixed.
  • 3.0K
  • 20 Oct 2022
Topic Review
Go90
Go90 was an American Internet television service and mobile app owned and operated by Verizon Communications. The service was positioned as a mobile-oriented "social entertainment platform" targeted primarily towards millennials, featuring a mixture of new and acquired content from various providers. The service was available exclusively within the United States, although as of March 2018 some of its content became available internationally via Tumblr. Following an unsuccessful launch (which content partners credited to a lack of firm content strategies), resulting managerial turnover (including a relaunch of the service by the staff of Verizon acquisition and former competitor Vessel), Including acquisitions that became the basis of the service (such as Intel's OnCue project, and later Vessel), it was estimated that Verizon had spent $1.2 billion on the service.
  • 3.0K
  • 08 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
Hindu Mythology
Template:Hindu mythology Hindu mythology are narratives found in Hindu texts such as the Vedic literature, epics like Mahabharata and Ramayana, the Puranas, the regional literatures Sangam literature and Periya Puranam. Hindu mythology is also found in widely translated popular texts such as the Panchatantra and Hitopadesha, as well as Southeast Asian texts. Hindu mythology does not often have a consistent, monolithic structure. The same myth typically appears in various versions, and can be represented differently across socio-religious traditions. These myths have also been noted to have been modified by various philosophical schools over time and particularly in the Hindu tradition. These myths are taken to have deeper, often symbolic, meaning, and have been given a complex range of interpretations.
  • 3.0K
  • 02 Dec 2022
Topic Review
Integration of Offshore Wind with Tidal Energy
Reducing the cost of electricity generation and integrating renewable energy sources are two essential factors in encouraging the development of novel ideas to tackle the lack of enough electricity and proposing alternatives for fossil fuels. Compared with onshore wind energy resources, offshore wind fields have many advantages, such as persistent wind, faster-flowing speed, higher uniformity, and longer available time per year, flat sea surface, and low turbulence intensity, which promotes the vigorous development of the offshore wind power industry.
  • 3.0K
  • 09 Dec 2022
Topic Review
Radical
In chemistry, a free radical is an atom, molecule, or ion that has at least one unpaired valence electron. With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize. Most organic radicals have short lifetimes. A notable example of a radical is the hydroxyl radical (HO·), a molecule that has one unpaired electron on the oxygen atom. Two other examples are triplet oxygen and triplet carbene (꞉CH2) which have two unpaired electrons. Radicals may be generated in a number of ways, but typical methods involve redox reactions. Ionizing radiation, heat, electrical discharges, and electrolysis are known to produce radicals. Radicals are intermediates in many chemical reactions, more so than is apparent from the balanced equations. Radicals are important in combustion, atmospheric chemistry, polymerization, plasma chemistry, biochemistry, and many other chemical processes. A majority of natural products are generated by radical-generating enzymes. In living organisms, the radicals superoxide and nitric oxide and their reaction products regulate many processes, such as control of vascular tone and thus blood pressure. They also play a key role in the intermediary metabolism of various biological compounds. Such radicals can even be messengers in a process dubbed redox signaling. A radical may be trapped within a solvent cage or be otherwise bound.
  • 3.0K
  • 15 Nov 2022
Topic Review
Atmospheric Turbulence
The foundation of any smart city requires an innovative and robust communication infrastructure. Many research communities envision free-space optical communication (FSO) as a promising backbone technology for the services and applications provided by such cities. However, the channel through which the FSO signal travels is the atmosphere. Therefore, the FSO performance is limited by the local weather conditions. The variation in meteorological variables leads to variations of the refractive index along the transmission path. These index inhomogeneities (i.e., atmospheric turbulence) can significantly degrade the performance of FSO systems.  The effect of atmospheric turbulence on FSO systems is a considerable challenge. Such turbulence can produce beam scintillation, spreading, and wandering, resulting in a significant reduction in BER performance and the inability to use the communication link.
  • 3.0K
  • 24 Apr 2022
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
Targeted Muscle Reinnervation
Targeted Muscle Reinnervation (TMR) is considered to be an innovative and relevant surgical technique for improving the prosthetic control for people with different amputation levels of the limb. Indeed, TMR surgery makes it possible to obtain reinnervated areas that act as biological amplifiers of the motor control. On the technological side, a great deal of research has been conducted in order to evaluate various types of myoelectric prosthetic control strategies, whether direct control or pattern recognition-based control. In the literature, different control performance metrics, which have been evaluated on TMR subjects, have been introduced, but no accepted reference standard defines the better strategy for evaluating the prosthetic control. Indeed, the presence of several evaluation tests that are based on different metrics makes it difficult the definition of standard guidelines for comprehending the potentiality of the proposed control systems. Additionally, there is a lack of evidence about the comparison of different evaluation approaches or the presence of guidelines on the most suitable test to proceed for a TMR patients case study. This review aims at identifying these limitations byexamining the several studies in the literature on TMR subjects, with different amputation levels, and proposing a standard method for evaluating the control performance metrics.
  • 3.0K
  • 31 Mar 2021
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
Topic Review
The Impact of Airbnb Brand on Consumer Involvement
Airbnb is one of the leading businesses in the hospitality industry, and is one of the fastest growing corporations in sharing economy services. The brand operates on a marketplace platform, and connects travelers with hosts all over the world. Trust is essential for purchase intentions, particularly online, and the degree of involvement determines whether or not the brand is committed to its promises. In the context of Airbnb, users pay for their services online, and are allowed to present reviews for future travelers. Unlike other business models, Airbnb has to preserve its image by providing innovative and quality services for travelers, especially in the hospitality industry, where the product attributes only differ slightly. With Airbnb’s rapid growth, the aspects of brand personality become critical when establishing a positive brand image and positioning the company as a platform that provides unique experiences to its users and possesses a distinct identity.
  • 3.0K
  • 20 Jul 2022
Topic Review
Falkland Islands Wolf
The Falkland Islands Wolf, scientifically known as Dusicyon australis, was a unique canid species that once inhabited the Falkland Islands in the South Atlantic Ocean. Also known as the Warrah, it represented the only native land mammal on the islands and is believed to have been isolated for thousands of years, evolving in the absence of large predators. Unfortunately, the Falkland Islands Wolf became extinct in the 19th century, marking the end of a distinct evolutionary lineage.
  • 3.0K
  • 08 Feb 2024
Topic Review
Lipid Metabolism in COVID-19
The current Coronavirus disease 2019 or COVID-19 pandemic has infected over two million people and resulted in the death of over one hundred thousand people at the time of writing this review. The disease is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV2). Even though multiple vaccines and treatments are under development so far, the disease is only slowing down under extreme social distancing measures that are difficult to maintain. SARS-COV2 is an enveloped virus that is surrounded by a lipid bilayer. Lipids are fundamental cell components that play various biological roles ranging from being a structural building block to a signaling molecule as well as a central energy store. The role lipids play in viral infection involves the fusion of the viral membrane to the host cell, viral replication, and viral endocytosis and exocytosis. Since lipids play a crucial function in the viral life cycle, we asked whether drugs targeting lipid metabolism, such as statins, can be utilized against SARS-CoV-2 and other viruses. In this review, we discuss the role of lipid metabolism in viral infection as well as the possibility of targeting lipid metabolism to interfere with the viral life cycle.
  • 3.0K
  • 28 Oct 2020
Topic Review
LC-MS Methods for Mycotoxins Detection in Food Products
Mycotoxins are a group of natural compounds produced under a wide range of climatic conditions by filamentous fungi mainly belonging to Aspergillus, Penicillium, Fusarium, Claviceps and Alternaria species. These toxins can contaminate various agricultural commodities (cereals, dried fruits, nuts, spices and coffee being the most frequently contaminated ones) either before harvest or under postharvest conditions, thus posing a risk to human and animal health due to their toxic effects.
  • 3.0K
  • 15 Jun 2022
Topic Review
TBC-assisted Cooling Air System Simulation
Thermal barrier coating (TBC) and cooling air systems are among the technologies that have been introduced and applied in pursuing the extensive development of advanced gas turbine. TBC is used to protect the gas turbine components from the higher operating temperature of advanced gas turbine, whereas cooling air systems are applied to assist TBC in lowering the temperature exposure of protected surfaces. Generally, a gas turbine operates in three main operational modes, which are base load, peak load, and part peak load. TBC performance under these three operational modes has become essential to be studied, as it will provide the gas turbine owners not only with the behaviors and damage mechanism of TBC but also a TBC life prediction in a particular operating condition.
  • 3.0K
  • 23 Jun 2021
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
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