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Topic Review
King Abdulaziz International Airport
King Abdulaziz International Airport (KAIA) (Arabic: مطار الملك عبدالعزيز الدولي) (IATA: JED, ICAO: OEJN) is a Saudi international airport located 19 km to the north of Jeddah. Named after King Abdulaziz Al Saud and inaugurated in 1981, the airport is the busiest airport of Saudi Arabia and the third-largest airport in the kingdom. The airport's Hajj Terminal was specially built for Muslim pilgrims going to Mecca annually on the Hajj. It is one of the largest in the world, and can handle 80,000 passengers at the same time.
  • 4.2K
  • 23 Nov 2022
Topic Review
Chemical Depolymerization Methods of Poly(ethylene terephthalate)
The significant amount of waste generated by poly(ethylene terephthalate) (PET) requires the development of a recycling process chain in which chemical recycling plays an important role. On the one hand, it allows the depolymerization of degraded plastics that do not meet the quality requirements to be used in mechanical recycling, and on the other hand, provides an opportunity to process cheap waste and obtain products with greater added value. It can be widely used in the recycling of both packaging plastics and textiles, or other waste generated with PET.
  • 4.2K
  • 12 Oct 2023
Topic Review Video Peer Reviewed
Deep Meaningful Learning
Deep meaningful learning is the higher-order thinking and development through manifold active intellectual engagement aiming at meaning construction through pattern recognition and concept association. It includes inquiry, critical thinking, creative thinking, problem-solving, and metacognitive skills. It is a theory with a long academic record that can accommodate the demand for excellence in teaching and learning at all levels of education. Its achievement is verified through knowledge application in authentic contexts. 
  • 4.2K
  • 13 Apr 2022
Topic Review
Well-Known Text
Well-known text (WKT) is a text markup language for representing vector geometry objects on a map, spatial reference systems of spatial objects and transformations between spatial reference systems. A binary equivalent, known as well-known binary (WKB), is used to transfer and store the same information on databases. The formats were originally defined by the Open Geospatial Consortium (OGC) and described in their Simple Feature Access and Coordinate Transformation Service specifications. The current standard definition is in the ISO/IEC 13249-3:2016 standard, "Information technology – Database languages – SQL multimedia and application packages – Part 3: Spatial" (SQL/MM) and ISO 19162:2015, "Geographic information – Well-known text representation of coordinate reference systems".
  • 4.2K
  • 27 Oct 2022
Topic Review
Diamond-Like Carbon Films
Diamond-like carbon (DLC) films have been extensively applied in industries owing to their excellent characteristics such as high hardness. In particular, there is a growing demand for their use as protective films for mechanical parts owing to their excellent wear resistance and low friction coefficient. DLC films have been deposited by various methods and many deviate from the DLC regions present in the ternary diagrams proposed for sp3 covalent carbon, sp2 covalent carbon, and hydrogen. Consequently, redefining the DLC region on ternary diagrams using DLC coatings for mechanical and electrical components is urgently required. Therefore, we investigate the sp3 ratio, hydrogen content, and other properties of 74 types of amorphous carbon films and present the classification of amorphous carbon films, including DLC. We measured the sp3 ratios and hydrogen content using near-edge X-ray absorption fine structure and Rutherford backscattering-elastic recoil detection analysis under unified conditions. Amorphous carbon films were widely found with nonuniform distribution. The number of carbon atoms in the sp3 covalent carbon without bonding with hydrogen and the logarithm of the hydrogen content were inversely proportional. Further, we elucidated the DLC regions on the ternary diagram, classified the amorphous carbon films, and summarized the characteristics and applications of each type of DLC.
  • 4.2K
  • 28 Sep 2021
Topic Review
ESG Integration into the Business Model
The integration of environmental, social, and governance (ESG) into the business model means considering ESG issues in the existing business model, which is defined by four factors: value proposition, value creation, value delivery, and value capture.
  • 4.2K
  • 14 Mar 2022
Topic Review
Taurine, Bile Acids, and Microbiota
Taurine is the most abundant free amino acid in the body, and is mainly derived from the diet, but can also be produced endogenously from cysteine. It plays multiple essential roles in the body, including development, energy production, osmoregulation, prevention of oxidative stress, and inflammation. Taurine is also crucial as a molecule used to conjugate bile acids (BAs). In the gastrointestinal tract, BAs deconjugation by enteric bacteria results in high levels of unconjugated BAs and free taurine. Depending on conjugation status and other bacterial modifications, BAs constitute a pool of related but highly diverse molecules, each with different properties concerning solubility and toxicity, capacity to activate or inhibit receptors of BAs, and direct and indirect impact on microbiota and the host, whereas free taurine has a largely protective impact on the host, serves as a source of energy for microbiota, regulates bacterial colonization and defends from pathogens.
  • 4.2K
  • 19 Aug 2022
Topic Review
Issues and Challenges of Solid-State Transformer Technology
Solid-state transformer (SST) technology is one of the developing technologies that will be widely used in the future to integrate low-voltage and high-voltage networks with control circuitries and power electronics converters, facilitating renewables integration in smart grid applications. SST technology has crucial key advantageous features, including compact size and weight, low cost, and ease of connection in offshore applications. However, SST technology exhibits a few concerns, such as implementation, protection, economic, and communication compatibility, that need to be addressed.
  • 4.2K
  • 16 Sep 2022
Topic Review
Pentacene
Pentacene is a polycyclic aromatic hydrocarbon consisting of five linearly-fused benzene rings. This highly conjugated compound is an organic semiconductor. The compound generates excitons upon absorption of ultra-violet (UV) or visible light; this makes it very sensitive to oxidation. For this reason, this compound, which is a purple powder, slowly degrades upon exposure to air and light. Structurally, pentacene is one of the linear acenes, the previous one being tetracene (four fused benzene rings) and the next one being hexacene (six fused benzene rings). In August 2009, a group of researchers from IBM published experimental results of imaging a single molecule of pentacene using an atomic force microscope. In July 2011, they used a modification of scanning tunneling microscopy to experimentally determine the shapes of the highest occupied and lowest unoccupied molecular orbitals. In 2012, pentacene-doped p-terphenyl was shown to be effective as the amplifier medium for a room-temperature maser.
  • 4.2K
  • 12 Oct 2022
Topic Review
Consumption
Consumption is a fundamental economic and sociological concept that plays a pivotal role in shaping individual lifestyles, societal structures, and global economies. It refers to the utilization of goods and services by individuals or households to satisfy their needs and wants. This multifaceted phenomenon encompasses a wide range of activities, from the basic necessities of daily life to the acquisition of luxury items, and it has profound implications for various aspects of society.
  • 4.2K
  • 25 Jan 2024
Topic Review
Gamification as a Learning Strategy
The use of games for purposes other than mere entertainment dates back to very ancient stages of humanity itself. In the context of education and learning, the interest of researchers for their uses and effects is a more recent character, around the 1970s when Clark Abt coined the term serious game. He defined serious games as “those that have an explicit and carefully thought-out educational purpose and are not intended to be played primarily for amusement. This does not mean that serious games are not, or should not be, entertaining”(p. 27). This means that “the ‘seriousness’ of these games refers to a content that may well be used as teaching material by teachers” (p. 27). However, the interest in the educational use of games grew especially since the early 2000s when some game designers began looking for strategies to transfer the excitement and joy of playing to the real world. In its origin, this process adopted different names as playful or gameful design, but in 2002 Nick Pelling coined the term gamification to refer to the use of the game in contexts other than the game. Thus, a term that originated in the digital media industry was largely adopted in all potential application areas, including education.
  • 4.2K
  • 06 Jan 2022
Topic Review
History of Zoology Since 1859
This article considers the history of zoology since the theory of evolution by natural selection proposed by Charles Darwin in 1859. Charles Darwin gave new direction to morphology and physiology, by uniting them in a common biological theory: the theory of organic evolution. The result was a reconstruction of the classification of animals upon a genealogical basis, fresh investigation of the development of animals, and early attempts to determine their genetic relationships. The end of the 19th century saw the fall of spontaneous generation and the rise of the germ theory of disease, though the mechanism of inheritance remained a mystery. In the early 20th century, the rediscovery of Mendel's work led to the rapid development of genetics by Thomas Hunt Morgan and his students, and by the 1930s the combination of population genetics and natural selection in the "neo-Darwinian synthesis".
  • 4.2K
  • 21 Apr 2023
Topic Review
Cybersecurity of Battery Management System
Battery management systems (BMSs) are critical to ensure the efficiency and safety of high-power battery energy storage systems (BESSs) in vehicular and stationary applications. The proliferation of battery big data and cloud computing advancements has led to the development of a new generation of BMSs, named Cloud BMS (CBMS), aiming to improve the performance and safety of BESSs. The CBMS is a cyber-physical system with connectivity between the physical BMS and a cloud-based virtual BMS, which is realized through a communication channel such as Internet of Things. Compared to the traditional BMS, the CBMS offers significantly higher computational resources, leveraging the implementation of advanced digital twin models and best-in-class algorithms in the BMS software, which will provide superior performances.
  • 4.2K
  • 03 Aug 2023
Topic Review
Battery Management Systems
The evolving global landscape for electrical distribution and use created a need area for energy storage systems (ESS), making them among the fastest growing electrical power system products.
  • 4.2K
  • 16 Jun 2021
Topic Review
Way of the Five Pecks of Rice
The Way of the Five Pecks of Rice (Chinese: 五斗米道; pinyin: Wǔ Dǒu Mǐ Dào) or the Way of the Celestial Master, commonly abbreviated to simply The Celestial Masters, was a China Taoist movement founded by the first Celestial Master Zhang Daoling in 142 CE. At its height, the movement controlled a theocratic state in the Hanzhong valley, north of Sichuan. In 215 CE, the state was incorporated into Cao Cao's Kingdom of Wei, and the followers of the Celestial Master were dispersed all over China. The Celestial Masters believed that qi pervaded everything, and in order to achieve immortality, the correct balance of qi had to be present within the body. Having a poor quantity of qi in the body, would result in illness, and eventually death. Meditation could be used to restore qi to the body, but sex was to be avoided, as it could result in the loss of qi. If there was the correct balance of qi within the body upon death, an adherent could 'feign death' and be reborn. If not, an adherent would be transported to an earthly prison where he would face eternal torment. The Hanzhong state was divided into 24 regions which were led by an official. Each district had a civil register which recorded people's names and ranks. Three times a year, the registers were updated at the same time as an important feast. While a child's rank rose automatically, adults had to raise their own rank through religious achievement or marriage. Higher ranked people had more divine generals at their command, which could be used to fight demons that caused bad luck or disease. The state had a system of law that encouraged confession and benevolence rather than strict punishment. Criminals were asked to confess their crimes and meditate, and were given public work to do as a sentence. Few texts written by the Hanzhong Celestial Masters survive, with the most important being the Xiang'er commentary to the Dao De Jing. While the Hanzhong state lasted for only twenty-five years, their beliefs influenced all subsequent Daoist movements.
  • 4.2K
  • 25 Oct 2022
Topic Review
Eclipta prostrata (L.)L.(Asteraceae): Ethnomedicinal Uses and Chemical Constituents
Eclipta prostrata (L.) L. (Syn.: Eclipta alba (L.) Hassak, Family: Asteraceae) is an important medicinal plant in the tropical and subtropical regions. It is widely used in treating various diseases of skin, liver and stomach in India, Nepal, Bangladesh, and other countries.
  • 4.2K
  • 09 Dec 2021
Topic Review
Basalt Fiber-reinforced Polymer Properties
Reducing the fingerprint of infrastructure has become and is likely to continue to be at the forefront of stakeholders’ interests, including engineers and researchers. It necessary that future buildings produce minimal environmental impact during construction and remain durable for as long as practicably possible
  • 4.2K
  • 08 May 2021
Topic Review Peer Reviewed
Vibration-Assisted Ball Burnishing
Vibration-Assisted Ball Burnishing is a finishing processed based on plastic deformation by means of a preloaded ball on a certain surface that rolls over it following a certain trajectory previously programmed while vibrating vertically. The dynamics of the process are based on the activation of the acoustoplastic effect on the material by means of the vibratory signal transmitted through the material lattice as a consequence of the mentioned oscillation of the ball. Materials processed by VABB show a modified surface in terms of topology distribution and scale, superior if compared to the results of the non-assisted process. Subgrain formation one of the main drivers that explain the change in hardness and residual stress resulting from the process.
  • 4.2K
  • 13 Apr 2022
Topic Review
DTS (Sound System)
DTS, Inc. (originally Digital Theater Systems) is an American company that makes multichannel audio technologies for film and video. Based in Calabasas, California, the company introduced its DTS technology in 1993 as a competitor to Dolby Laboratories, incorporating DTS in the film Jurassic Park (1993). The DTS product is used in surround sound formats for both commercial/theatrical and consumer-grade applications. It was known as The Digital Experience until 1995. DTS licenses its technologies to consumer electronics manufacturers. The DTS brand was acquired by Tessera Holding Corporation in December 2016, then Tessera was renamed to Xperi Corporation.
  • 4.2K
  • 15 Nov 2022
Topic Review
Medical Robots
The combination of artificial intelligence technology and medical science has inspired the emergence of medical robots with novel functions that use new materials and have a neoteric appearance. 
  • 4.2K
  • 02 Jun 2021
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