Your browser does not fully support modern features. Please upgrade for a smoother experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort by:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
Topic Review
PSA XUD
The PSA XUD is a Diesel engine designed and built by PSA - Peugeot and Citroën. It is an Indirect injection (IDI) engine, that uses a version of the Ricardo Consulting Engineers Ricardo Comet V prechamber cylinder head design. The engine comes in 1.8 L (1,769 cc) N/A, 1.8 Turbo, 1.9 L (1,905 cc) N/A, Turbo, 2.1 12 valve N/A and Turbo and was the predecessor to the HDI range of engines. Early HDi Engines were a PSA design, later 16 valve engines were jointly developed with Ford.
  • 8.1K
  • 28 Oct 2022
Topic Review
Traditional Fermented Foods in Korea
Fermented foods are loved and enjoyed worldwide and are part of a tradition in several regions of the world. Koreans have traditionally had a healthy diet since people in this region have followed a fermented-foods diet for at least 5000 years. Fermented-product footprints are evolving beyond boundaries and taking the lead in the world of food. Fermented foods, such as jang (fermented soybean products), kimchi (fermented vegetables), jeotgal (fermented fish), and vinegar (liquor with grain and fruit fermentation), are prominent fermented foods in the Korean culture.
  • 8.1K
  • 09 Dec 2022
Topic Review
Social Complexity
Social complexity refers to the intricate and interconnected nature of social systems, where various elements such as institutions, individuals, and cultural dynamics interact in non-linear and unpredictable ways. It involves the recognition that social phenomena often exhibit emergent properties that cannot be fully understood by analyzing individual components in isolation, emphasizing the need for interdisciplinary approaches to grasp the complexity of social structures and behaviors.
  • 8.1K
  • 26 Jan 2024
Biography
John F. MacArthur
John Fullerton MacArthur Jr. (born June 19, 1939) is an American Protestant pastor and author known for his internationally syndicated Christian teaching radio and television program Grace to You.[1] He has been the pastor of Grace Community Church, a non-denominational church in Sun Valley, California, since February 9, 1969.[2] He is currently Chancellor Emeritus of The Master's University in
  • 8.1K
  • 15 Nov 2022
Topic Review
Application of RAP in Asphalt Concrete Pavements
The use of recycled asphalt pavement (RAP) materials in asphalt concrete pavements (ACP) brings significant cost and environmental benefits. In practice, however, the amount of RAP readily available far exceeds the amount being utilized in ACPs, which still leaves the problem of excess RAP in the environment partially solved. Additionally, ACPs containing RAP materials (i.e., RAP-ACPs) can still be landfilled after they have reached the end of their useful life, which may restore the original environmental waste problem. To address these, researchers have demonstrated different ways to maximize the application of RAP in ACPs. Among them, the use of RAP in pavement preventive maintenance (PPM) treatments and the repeated recycling of RAP-ACPs (i.e., RnAP) are specifically discussed herein. It is envisaged that, by promoting these two practices, the application and benefits of RAP can be further maximized to improve sustainability. 
  • 8.1K
  • 25 Nov 2022
Topic Review
Matthews Correlation Coefficient
The Matthews correlation coefficient (MCC) or phi coefficient is used in machine learning as a measure of the quality of binary (two-class) classifications, introduced by biochemist Brian W. Matthews in 1975. The MCC is defined identically to Pearson's phi coefficient, introduced by Karl Pearson, also known as the Yule phi coefficient from its introduction by Udny Yule in 1912. Despite these antecedents which predate Matthews's use by several decades, the term MCC is widely used in the field of bioinformatics and machine learning. The coefficient takes into account true and false positives and negatives and is generally regarded as a balanced measure which can be used even if the classes are of very different sizes. The MCC is in essence a correlation coefficient between the observed and predicted binary classifications; it returns a value between −1 and +1. A coefficient of +1 represents a perfect prediction, 0 no better than random prediction and −1 indicates total disagreement between prediction and observation. However, if MCC equals neither −1, 0, or +1, it is not a reliable indicator of how similar a predictor is to random guessing because MCC is dependent on the dataset. MCC is closely related to the chi-square statistic for a 2×2 contingency table where n is the total number of observations. While there is no perfect way of describing the confusion matrix of true and false positives and negatives by a single number, the Matthews correlation coefficient is generally regarded as being one of the best such measures. Other measures, such as the proportion of correct predictions (also termed accuracy), are not useful when the two classes are of very different sizes. For example, assigning every object to the larger set achieves a high proportion of correct predictions, but is not generally a useful classification. The MCC can be calculated directly from the confusion matrix using the formula: In this equation, TP is the number of true positives, TN the number of true negatives, FP the number of false positives and FN the number of false negatives. If any of the four sums in the denominator is zero, the denominator can be arbitrarily set to one; this results in a Matthews correlation coefficient of zero, which can be shown to be the correct limiting value. The MCC can be calculated with the formula: using the positive predictive value, the true positive rate, the true negative rate, the negative predictive value, the false discovery rate, the false negative rate, the false positive rate, and the false omission rate. The original formula as given by Matthews was: This is equal to the formula given above. As a correlation coefficient, the Matthews correlation coefficient is the geometric mean of the regression coefficients of the problem and its dual. The component regression coefficients of the Matthews correlation coefficient are Markedness (Δp) and Youden's J statistic (Informedness or Δp'). Markedness and Informedness correspond to different directions of information flow and generalize Youden's J statistic, the [math]\displaystyle{ \delta }[/math]p statistics and (as their geometric mean) the Matthews Correlation Coefficient to more than two classes. Some scientists claim the Matthews correlation coefficient to be the most informative single score to establish the quality of a binary classifier prediction in a confusion matrix context.
  • 8.1K
  • 18 Nov 2022
Biography
Shahid Khan
Shahid Khan (Urdu: شاہد خان‎; born July 18, 1950),[1][2] also known as Shad Khan, is a Pakistani-American billionaire businessman and philanthropist. He is the owner of the Jacksonville Jaguars of the National Football League (NFL) and Fulham F.C. of the English Premier League. Khan is also the owner of the automobile parts manufacturer Flex-N-Gate in Urbana, Illinois. Khan was feature
  • 8.1K
  • 30 Nov 2022
Topic Review
Self-confidence
The concept of self-confidence is commonly used as self-assurance in one's personal judgment, ability, power, etc. One's self confidence increases from experiences of having satisfactorily completed particular activities. It is a positive belief that in the future one can generally accomplish what one wishes to do. Self-confidence is not the same as self-esteem, which is an evaluation of one's own worth, whereas self-confidence is more specifically trust in one's ability to achieve some goal, which one meta-analysis suggested is similar to generalization of self-efficacy. Abraham Maslow and many others after him have emphasized the need to distinguish between self-confidence as a generalized personality characteristic, and self-confidence with respect to a specific task, ability or challenge (i.e. self-efficacy). Self-confidence typically refers to general self-confidence. This is different from self-efficacy, which psychologist Albert Bandura has defined as a “belief in one’s ability to succeed in specific situations or accomplish a task” and therefore is the term that more accurately refers to specific self-confidence. Psychologists have long noted that a person can possess self-confidence that he or she can complete a specific task (self-efficacy) (e.g. cook a good meal or write a good novel) even though they may lack general self-confidence, or conversely be self-confident though they lack the self-efficacy to achieve a particular task (e.g. write a novel). These two types of self-confidence are, however, correlated with each other, and for this reason can be easily conflated.
  • 8.1K
  • 18 Oct 2022
Biography
Victor Hugo
Victor Marie Hugo French: [viktɔʁ maʁi yɡo] 26 February 1802 – 22 May 1885) was a French poet, novelist, and dramatist of the Romantic movement. Hugo is considered to be one of the greatest and best-known French writers. Outside of France, his most famous works are the novels Les Misérables, 1862, and The Hunchback of Notre-Dame (French: Notre-Dame de Paris), 1831. In France, Hugo is kno
  • 8.0K
  • 30 Nov 2022
Topic Review
Adaptive Reuse of Architectural Heritage
       Significant architectural and historical monuments become an important point of reference for the local population, increasing their sense of security, and act as a factor shaping social identity. An effort to preserve relevant objects in a city is therefore important both for retaining its unique features and for strengthening the local community. A significant role plays here the adaptive reuse of architectural heritage, which allows for the preservation of architectural objects that are important to the local community, promoting the integrity and historical continuity of the city while restoring the objects’ functional and economic value.         The introduction of a new function in architectural heritage is not only an important impulse for the tangible regeneration of urban tissue, but can also help to reconstruct the image and identity of a city. The local cultural and architectural heritage plays a significant role in the process leading to the creation of positive references and elimination of negative connotations related to an economic or social crisis. These remain an important part of the history of a city and, at the same time, its significance may be reimagined and shown in a new context, that relates to the present day. As a result, artefacts of the past gain new meanings, which are subject to a different, contemporary interpretation through the prism of current needs and ideas. Objects or even groups of objects from the past are being consciously taken into consideration in the activities currently undertaken. The contemporary scale of the phenomenon and complexity of the issues concerning the adaptive reuse of architectural heritage are a consequence of the multi-faceted transformations that have taken place in recent decades in the social, cultural and economic spheres, and, consequently, the contemporary understanding of the role and significance of the architectural heritage.
  • 8.0K
  • 31 Aug 2021
Topic Review
VDM-1
The Processor Technology VDM-1, for Video Display Module, was the first video card for S-100 bus computers. Created in 1975, it allows an S-100 machine to produce its own display, and when paired with a keyboard and their 3P+S card, it eliminates the need for a separate video terminal. Using a 7 x 9 dot matrix and ASCII characters, it produces a 64-column by 16-row text display. The VDM-1 is a complex card and was soon replaced by an increasing number of similar products from other companies. An early competitor was the Solid State Music VB-1, which offers an identical display from a much simpler card. Later cards using LSI chips have enough room to include the keyboard controller as well.
  • 8.0K
  • 08 Oct 2022
Topic Review
Meat Packaging
The term ‘packaging’ refers to the technological intervention aimed at the protection of food from a variety of factors, which provokes the product detriment. Packaging is considered as one of the most interesting technological aspects and a constantly evolving issue in food production. 
  • 8.0K
  • 21 Jan 2021
Topic Review
Charging Technology for Battery Electric Buses
The charging infrastructure has a key role in the implementation of battery electric buses (BEBs) in cities. BEBs only use off-board chargers, whereas the PEC to convert the three-phase AC power from the grid into DC power to charge the battery is located outside the BEB. These chargers allow higher charging power levels because they are not restricted in size and weight. Furthermore, since the driving range of a BEB is limited, a specific charging concept and interface is required to keep the BEB running during the day. This entry gives an overview of the existing charging interfaces and concepts and charger and PEC topologies to provide a reliable and efficient charging behavior.
  • 8.0K
  • 18 Nov 2021
Topic Review Peer Reviewed
Ferdinand II of Aragon (1479–1516)
Ferdinand II king of Aragon (1479–1516). He was the fourth king of the Trastámara dynasty, which had first come to power after the Compromise of Caspe, reached after Martin I died with no living descendants in 1410. Although in terms of artistic patronage Ferdinand II was not as active as his wife Elisabeth I, he was still aware that the wise use of artistic commissions in reinforcing ideas and concepts favourable to the institution of the monarchy. He is a highly important figure in the history of Spain because, along with Elisabeth, he was one of the Catholic Monarchs and thus represents a new conception of power based on their joint governance, a fact that is reflected in the iconography found in his artistic commissions across all genres. All of the images are evidence of how King Ferdinand, at the end of the Middle Ages, wanted to be recognised by his subjects, who also used his image for legitimising and propagandistic purposes. Nobody else in the history of the Hispanic kingdoms had their image represented so many times and on such diverse occasions as did the Catholic Monarchs.
  • 8.0K
  • 13 Apr 2022
Topic Review
Tumoroid
The term “tumoroid” means “tumor-like organoid”: tumoroids typically derive from primary tumors harvested from oncological patients and they can mimic human tumor microenvironment (TME); nowadays, they are considered a promising tool for cost-effective studies on novel anticancer drugs to be used in precision medicine in the field of oncology.
  • 8.0K
  • 18 Jun 2024
Topic Review
List of Temples in Tamil Nadu
This is a list of temples in the Indian state of Tamil Nadu which is famed for Hindu temples, culture and tradition and commonly known as the Land of Temples. Tamil Nadu has more temples than any other states of India. Tamil Nadu is home to more than 40,000 Hindu, Buddhist, Jain, local deities, Ayyavazhi temples and is aptly called "the land of temples" by media. Many are at least 800 to 5000 years old and are found scattered all over the state. The rulers of various dynasties constructed these temples over centuries. Vimanas (storeys) and Gopuram (towering gateways to the temple complex) best characterize the temples of Tamil Nadu. As per Tamil Nadu Hindu Endowments Board, there are 38,615 temples. Most of the largest Hindu temples reside here. Studded with complex architecture, variety of sculptures, and rich inscriptions, the temples remain the very essence of the culture and heritage of Tamil land, with historical records dating back to at least 3,000 years. In Madurai, Meenakshi Amman Temple has high ‘Gopuram’ towers ornamented with colourful figures. On Pamban Island, Ramanathaswamy Temple is a famous pilgrimage site. The town of Kanyakumari, at India's southernmost tip, is the site of ritual sunrises. The state also abounds with temple tanks. The state has 2,359 temple tanks located in 1,586 temples. The government has identified 1,068 tanks for renovation. People from all over the world visits Temples of Tamil Nadu and it is the major Tourist attraction in India.
  • 8.0K
  • 07 Nov 2022
Topic Review
Ethology
Ethology is the scientific study of animal behaviour, usually with a focus on behaviour under natural conditions, and viewing behaviour as an evolutionarily adaptive trait. Behaviourism as a term also describes the scientific and objective study of animal behaviour, usually referring to measured responses to stimuli or to trained behavioural responses in a laboratory context, without a particular emphasis on evolutionary adaptivity. Throughout history, different naturalists have studied aspects of animal behaviour. Ethology has its scientific roots in the work of Charles Darwin and of American and German ornithologists of the late 19th and early 20th century, including Charles O. Whitman, Oskar Heinroth, and Wallace Craig. The modern discipline of ethology is generally considered to have begun during the 1930s with the work of Dutch biologist Nikolaas Tinbergen and Austrian biologists Konrad Lorenz and Karl von Frisch, the three recipients of the 1973 Nobel Prize in Physiology or Medicine. Ethology combines laboratory and field science, with a strong relation to some other disciplines such as neuroanatomy, ecology, and evolutionary biology. Ethologists typically show interest in a behavioural process rather than in a particular animal group, and often study one type of behaviour, such as aggression, in a number of unrelated species. Ethology is a rapidly growing field. Since the dawn of the 21st century researchers have re-examined and reached new conclusions in many aspects of animal communication, emotions, culture, learning and sexuality that the scientific community long thought it understood. New fields, such as neuroethology, have developed. Understanding ethology or animal behaviour can be important in animal training. Considering the natural behaviours of different species or breeds enables trainers to select the individuals best suited to perform the required task. It also enables trainers to encourage the performance of naturally occurring behaviours and the discontinuance of undesirable behaviours.
  • 8.0K
  • 09 Nov 2022
Topic Review
Two-Dimensional Space
Two-dimensional space (also known as 2D space, 2-space, or bi-dimensional space) is a geometric setting in which two values (called parameters) are required to determine the position of an element (i.e., point). The set [math]\displaystyle{ \mathbb{R}^2 }[/math] of pairs of real numbers with appropriate structure often serves as the canonical example of a two-dimensional Euclidean space. For a generalization of the concept, see dimension. Two-dimensional space can be seen as a projection of the physical universe onto a plane. Usually, it is thought of as a Euclidean space and the two dimensions are called length and width.
  • 8.0K
  • 28 Nov 2022
Topic Review Peer Reviewed
Khosrow II (590–628 CE)
Khosrow II (r. 590–628 CE) was the last great Sasanian king who took the throne with the help of the Romans and broke with dynastic religious preferences as he became married to a Christian empress. It was under his rule that the Sasanian Empire reached its greatest expansion. From the standpoint of iconographic studies, Khosrow II is among the most influential Persian kings. Although he was literally occupied by rebels and wars within the borders of the Sasanian territories and beyond, Khosrow managed to create a powerful image of himself that emphasized the legitimacy of his monarchy. Indeed, Khosrow Parviz (the Victorious) drew upon royal iconography as a propaganda tool on a wide range of materials such as rock and stucco reliefs, coins, seals, and metal plates. His image (created both visually and verbally) not only revived the traditional iconography of the Persian kings but also evolved it in a way that transcended his time and was passed on to the early Islamic Caliphates after him. Khosrow II imitated and manipulated the traditional royal iconography of his predecessors in order to display his legitimacy, piety, and valor. 
  • 8.0K
  • 17 May 2022
Topic Review
Ghauri (Missile)
The Ghauri–I (Urdu: غوری-ا‎; official codename: Hatf–5 Ghauri–I) is a land-based surface-to-surface medium-range ballistic missile, in current service with the Pakistan Army's Strategic Forces Command— a subordinate command of Strategic Plans Division. Influenced from the design of Nodong-1 of North Korea, its extensive modification and engineering took place in Kahuta Research Laboratories (KRL) in 1990s with an objective of developing an electronic system that uses a single stage liquid fuel rocket motor to carry a payload of 700 kg to a range of 1,500 km. This is enough to reach most, if not all of India. Two variants of the Ghauri were produced under the secretive missile research programme started in 1987 and the development of a third variant was cancelled. The Ghauri-II uses increased motor assembly length and improved propellants for an increased range of 2,300 km (1,400 mi). The missile is named after Shahabuddin Muhammad Ghauri, while the "Hatf" designation originates from the name of the sword or lance of the Islamic prophet Muhammad.
  • 8.0K
  • 09 Nov 2022
  • Page
  • of
  • 2786
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Encyclopedia of Engineering
Encyclopedia of Social Sciences
Encyclopedia of COVID-19
Academic Video Service
Feedback