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Topic Review
Big Data Analytics in COVID-19
The COVID-19 epidemic has caused a large number of human losses and havoc in the economic, social, societal, and health systems around the world. Controlling such epidemic requires understanding its characteristics and behavior, which can be identified by collecting and analyzing the related big data. Big data analytics tools play a vital role in building knowledge required in making decisions and precautionary measures. However, due to the vast amount of data available on COVID-19 from various sources, there is a need to review the roles of big data analysis in controlling the spread of COVID-19, presenting the main challenges and directions of COVID-19 data analysis, as well as providing a framework on the related existing applications and studies to facilitate future research on COVID-19 analysis.
  • 3.5K
  • 04 Jun 2021
Topic Review
Aminoacyl-tRNA Synthetases
Aminoacyl-tRNA synthetases (aaRSs) are a family of essential and universal ‘house-keeping’ enzymes responsible for catalyzing the esterification of amino acids to their cognate tRNAs.
  • 3.5K
  • 09 Mar 2021
Topic Review
Christian Atheism
Christian atheism is a form of Christianity that rejects theistic claims of Christianity, but draws its beliefs and practices from Jesus' life and/or teachings as recorded in the New Testament Gospels and other sources. Christian atheism takes many forms:
  • 3.5K
  • 02 Nov 2022
Topic Review
Time Geography
Time geography or time-space geography is an evolving transdisciplinary perspective on spatial and temporal processes and events such as social interaction, ecological interaction, social and environmental change, and biographies of individuals. Time geography "is not a subject area per se", but rather an integrative ontological framework and visual language in which space and time are basic dimensions of analysis of dynamic processes. Time geography was originally developed by human geographers, but today it is applied in multiple fields related to transportation, regional planning, geography, anthropology, time-use research, ecology, environmental science, and public health. According to Swedish geographer Bo Lenntorp: "It is a basic approach, and every researcher can connect it to theoretical considerations in her or his own way."
  • 3.5K
  • 13 Nov 2022
Topic Review
Discover Card
Discover is a credit card brand issued primarily in the United States. It was introduced by Sears in 1985. When launched, Discover did not charge an annual fee and offered a higher-than-normal credit limit, features that were disruptive to the existing credit card industry. A subsequent innovation was "Cashback Bonus" on purchases. Most cards with the Discover brand are issued by Discover Bank, formerly the Greenwood Trust Company. Discover transactions are processed through the Discover Network payment network. In 2005, Discover Financial Services acquired Pulse, an electronic funds transfer network, allowing it to market and issue debit and ATM cards. In February 2006, Discover Financial Services announced that it would begin offering Discover Debit cards to other financial institutions, made possible by the acquisition of Pulse. Discover is the fourth largest credit card brand in the U.S., behind Visa, MasterCard and American Express, with nearly 44 million cardholders.
  • 3.5K
  • 01 Nov 2022
Topic Review
Sesame
Sesame (Sesamum indicum L.) is an important oilseed crop with well-developed value chains. It is Ethiopia’s most valuable export commodity after coffee (Coffea arabica L.), contributing to socioeconomic development. The productivity of the crop is low and stagnant in Ethiopia and other major sesame growing regions in sub-Saharan Africa (<0.6 t/ha) due to a multitude of production constraints. The low yield of sesame is attributable to a lack of high-yielding and well-adapted varieties, susceptibility to capsule shattering, the prevalence of biotic and abiotic stresses, and a lack of modern production technologies such as optimal agronomic managing practices, row planters, harvesters, and storage facilities.
  • 3.5K
  • 17 Jan 2022
Topic Review
Plant to Plant Communication via Mycorrhizal Networks
Plants communicate via mycorrhizal networks with other plants of the same or different species. Mycorrhizal networks allow for the transfers of signals and cues between plants which influence the behavior of the connected plants by inducing morphological or physiological changes. The chemical substances which act as these signals and cues are referred to as infochemicals. These can be allelochemicals, defensive chemicals or nutrients. Allelochemicals are used by plants to interfere with the growth or development of other plants or organisms, defensive chemicals can help plants in mycorrhizal networks defend themselves against attack by pathogens or herbivores, and transferred nutrients can affect growth and nutrition. Results of studies which demonstrate these modes of communication have led the authors to hypothesize mechanisms by which the transfer of these nutrients can affect the fitness of the connected plants.
  • 3.5K
  • 05 Dec 2022
Topic Review
Bacteroidetes
The phylum "Bacteroidetes" is composed of three large classes of Gram-negative, nonsporeforming, anaerobic or aerobic, and rod-shaped bacteria that are widely distributed in the environment, including in soil, sediments, and sea water, as well as in the guts and on the skin of animals. Although some Bacteroides spp. can be opportunistic pathogens, many "Bacteroidetes" are symbiotic species highly adjusted to the gastrointestinal tract. Bacteroides are highly abundant in intestines, reaching up to 1011 cells g−1 of intestinal material. They perform metabolic conversions that are essential for the host, such as degradation of proteins or complex sugar polymers. "Bacteroidetes" colonize the gastrointestinal tract already in infants, as non-digestible oligosaccharides in mother milk support the growth of both Bacteroides and Bifidobacterium spp. Bacteroides spp. are selectively recognized by the immune system of the host through specific interactions.
  • 3.5K
  • 21 Jul 2025
Topic Review
Mathematical Physics
Mathematical physics refers to the development of mathematical methods for application to problems in physics. The Journal of Mathematical Physics defines the field as "the application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and for the formulation of physical theories". An alternative definition would also include those mathematics that are inspired by physics (also known as physical mathematics).
  • 3.5K
  • 27 Oct 2022
Topic Review
Embryonic Development
In developmental biology, embryonic development, also known as embryogenesis, is the development of an animal or plant embryo. Embryonic development starts with the fertilization of an egg cell (ovum) by a sperm cell, (spermatozoon). Once fertilized, the ovum becomes a single diploid cell known as a zygote. The zygote undergoes mitotic divisions with no significant growth (a process known as cleavage) and cellular differentiation, leading to development of a multicellular embryo after passing through an organizational checkpoint during mid-embryogenesis. In mammals, the term refers chiefly to the early stages of prenatal development, whereas the terms fetus and fetal development describe later stages.
  • 3.5K
  • 28 Apr 2023
Topic Review Peer Reviewed
Experiences of Parenting Multiple Expressions of Relationally Challenging Childhood Behaviours across Contexts
This entry delves into the parenting literature and reveals the complexities, perspectives, and multiple expressions of parenting challenging childhood behavior that distress or negatively impact the parent-child relationship so that we can better understand how to support families who are struggling to cope. The entry specifically focuses on the period of transition to school for children aged five to eight years. This transition can illuminate vulnerabilities previously hidden as children attempt to navigate the demands of their unfamiliar environment, meaning that parents can experience distress and emotional challenges. The entry explores the various expressions of relationally challenging behavior and comments on the intersectionality and reciprocity of explicit and implicit expressions of affect such as frustration and anxiety. To gain context, the entry examines common antecedents associated with relationally challenging behavior, such as academic comparison, forming friendships, hidden neurodiverse development, neglect, attachment dysfunction, and family conflict. Qualitative literature enriches understanding and identifies problems such as parental distress related to social stigma and minority stress and reveals specific struggles, including stress, related to homeschooling children with special educational needs, homeschooling during the recent pandemic, single parenting, grandparenting, parenting neurodiverse children, and the triangulated tensions that exist between the parent, the child, and the school. Holding in mind these diverse and context-orientated perspectives, this entry examines research that evaluates helpfulness and illuminates deficiencies of popular structured parent programs. Lastly, the entry identifies and illuminates the need to know more about the ways in which parent programs work, and it is anticipated that this new knowledge will help practitioners to better respond to the complexities of need and expectations of families who struggle to cope with relationally challenging behavior.
  • 3.5K
  • 23 May 2023
Topic Review
Operating Principles of Fiber Bragg Grating Sensors
Fiber Bragg gratings (FBG) sensors are increasingly commercially available and are, one of the most popular sensors from the fiber optic sensing family, having found use in a variety of industrial and research applications. A conventional FBG sensor is made up of a specially fabricated small and flexible segment imprinted into the core of a single-mode optical fiber.
  • 3.5K
  • 14 Dec 2022
Topic Review
Black Belt (Region of Alabama)
The Black Belt is a region of the U.S. state of Alabama. The term originally referred to the region's rich, black topsoil, much of it in the soil order Vertisols. The term took on an additional meaning in the 19th century, when the region was developed for cotton plantation agriculture, in which the workers were enslaved African Americans. After the American Civil War, many freedmen stayed in the area as sharecroppers and tenant farmers, continuing to comprise a majority of the population in many of these counties. The sociological definition of the "Black Belt," as related to the history of this cotton-dependent region, refers to a much larger region of the Southern United States, stretching from Delaware to Texas but centered on the Black Belt of uplands areas of Georgia, Alabama, Mississippi and Louisiana. In the antebellum and Jim Crow eras, the white elite of the Black Belt dominated Alabama state politics well into the 1960s. As in other Southern states, the white-dominated state legislature of Alabama passed laws and a constitution that created barriers to voter registration, essentially disfranchising most blacks and many poor whites. In addition, the state legislature did not redistrict congressional or state legislative districts after 1901 until it did so in the 1960s under US Supreme Court order. The white rural elite continued to dominate the state despite the rise of urbanized, industrial cities such as Birmingham, Alabama. Montgomery, the Black Belt's largest city, has been the capital of Alabama since 1846. Montgomery and Selma and other parts of the Black Belt were important centers of African-American public activism during the Civil Rights Movement from the 1950s to 1968. Since the black population gained the renewed ability to exercise their franchise after 1965 under the Voting Rights Act, they have largely supported Democratic Party candidates. This is in contrast to the majority-white areas of the state, where since the late 20th century, conservatives have largely shifted from the Democratic to the Republican Party.
  • 3.5K
  • 10 Oct 2022
Topic Review Peer Reviewed
Digital Transformation in the UK Retail Sector
Digital transformation is the process by which businesses adopt use of digital technologies to fundamentally change operations and customer interactions in order to optimize delivery and service. The UK refers to the United Kingdom which is shorthand for the United Kingdom of Great Britain and Northern Ireland which is a European country that primarily includes England, Wales and Scotland together with the northern part of Ireland. The retail sector includes businesses that sell goods or services directly to consumers for their personal use, opposed to selling to other organizations for business applications. Generation refers to a series of broad age groups that are considered to demonstrate different generalized characteristics.
  • 3.5K
  • 10 Sep 2025
Topic Review
Energy Condition
In relativistic classical field theories of gravitation, particularly general relativity, an energy condition is a generalization of the statement "the energy density of a region of space cannot be negative" in a relativistically-phrased mathematical formulation. There are multiple possible alternative ways to express such a condition such that can be applied to the matter content of the theory. The hope is then that any reasonable matter theory will satisfy this condition or at least will preserve the condition if it is satisfied by the starting conditions. Energy conditions are not physical constraints per se, but are rather mathematically imposed boundary conditions that attempt to capture a belief that "energy should be positive". Many energy conditions are known to not correspond to physical reality—for example, the observable effects of dark energy are well-known to violate the strong energy condition. In general relativity, energy conditions are often used (and required) in proofs of various important theorems about black holes, such as the no hair theorem or the laws of black hole thermodynamics.
  • 3.5K
  • 07 Nov 2022
Topic Review
Physiological and Anatomical Changes of Pregnancy
During pregnancy, a woman’s body undergoes various changes, both physiological and anatomical, necessary to meet the increased metabolic needs in order to support the growing fetus, for its harmonious development and also to prepare the body for birth. It has been observed that the first changes appear in the first trimester of pregnancy and intensify once the final term is reached and return to normal a few weeks after birth. The physiological changes produced by pregnancy are generally well tolerated by healthy women, but certain changes are still likely to aggravate different pathologies or give rise to a variety of disorders, especially musculoskeletal, which is the most common in pregnancy. A woman’s body undergoes major changes during pregnancy in all organs to support both the mother and the fetus.
  • 3.5K
  • 15 Nov 2023
Topic Review
Urban Wetlands
Wetlands are a critical part of natural environments that offer a wide range of ecosystem services. In urban areas, wetlands contribute to the livability of cities through improving the water quality, carbon sequestration, providing habitats for wildlife species, reducing the effects of urban heat islands, and creating recreation opportunities. 
  • 3.5K
  • 13 Jan 2022
Topic Review
Biosurfactants
Biosurfactants can play a significant role in the prevention, control and treatment of diseases caused by a range of pathogenic agents through various therapeutic, pharmaceutical, environmental and hygiene approaches. 
  • 3.5K
  • 28 Jan 2021
Topic Review
Technologies for Railway Track Maintenance
Inspection and repair interventions play vital roles in the asset management of railways. Autonomous mobile manipulators possess considerable potential to replace humans in many hazardous railway track maintenance tasks with high efficiency and increased asset utilization. Railway track maintenance technologies ranges from handheld devices to whole train, from manually pushed trolley to autonomous robots. 
  • 3.5K
  • 02 Jun 2023
Topic Review
Ibrexafungerp
Ibrexafungerp is a first-in-class IV/oral triterpenoid antifungal agent. Similar in mechanism of action to echinocandins, ibrexafungerp inhibits (1→3)-β-D-glucan synthase, a key component of the fungal cell wall, resulting in fungicidal activity against Candida spp. Ibrexafungerp demonstrates broad in vitro activity against Candida spp.,Aspergillus spp., dimorphic fungi Pneumocystis and other emerging yeasts and mold pathogens including azole and echinocandin-resistant isolates. It is currently in late clinical development for treatment and prevention of vulvovaginal candidiasis. Other ongoing trials include treatment of serious fungal infections, including, invasive candidiasis, Candida auris infections, invasive aspergillosis and refractory fungal disease in patients not responding to or who are intolerant to standard of care .
  • 3.5K
  • 17 Mar 2021
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