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Topic Review
Abrasive Water-Jet Machining
Abrasive water jet machining (AWJM) is a very useful non-conventional machining for the cutting of dissimilar materials at once. It is a flexible process that generates low thermal damage to the machined surface as there is no continuous tool-material con- tact along the machining process. Compared to conventional processes such as milling, abrasive particles are used in water jet machining. These particles have cutting edges that allow the machining of the material by overlapping of small impacts that deform the material. At each instant, a quantity of abrasive particles travels in the water jet in order to perform the cut.
  • 13.1K
  • 24 Feb 2021
Topic Review
Interfaith Marriage
Interfaith marriage, sometimes called a "mixed marriage", is marriage between spouses professing different religions. Although interfaith marriages are most often contracted as civil marriages, in some instances they may be contracted as a religious marriage. This depends on religious doctrine of the two party's religions; some of which prohibit interfaith marriage, but others allow it in limited circumstances. Several major religions are mute on the issue, and still others allow it with requirements for ceremony and custom. For ethno-religious groups, resistance to interfaith marriage may be a form of self-segregation. In an interfaith marriage, each partner typically adheres to their own religion, but an important point is in what faith the children will be raised.
  • 13.1K
  • 25 Oct 2022
Topic Review
Mobile Technology in Tourism
The influence of mobile technology on tourism is very significant. With the support of mobile-related devices (smartphones, glasses, or other wearable devices), technology, data and services, multiple travel concepts, and travel modes including mobile tourism, smart tourism, e-tourism, and sustainable tourism have emerged or developed further. Mobile technology is touted as the next technology wave that can fundamentally change tourism and hotels. Moreover, mobile technology is playing an increasing role in the travel experience, and increasing travel research is concentrated in this field. Research findings show that, first, the research of mobile technology in tourism can be divided into three phases and to a certain extent is synchronized with the development of mobile technology. Second, in the area of social sciences, the research of mobile technology in tourism needs further exploration, which must refer to related research in the areas of Transportation and IT to expand the perspective of research. Top journal analysis, journal co-citation analysis, author co-citation analysis, and collaboration network analysis reveal the most representative journals, authors, institutions, and countries/regions in this research field. This finding provides a valuable reference for scholars in this field. Additionally, this research also grasped the hot and cutting-edge topics in this field through the analysis of keywords in this field. Finally, the clustering of co-citation references presents the knowledge base of mobile technology research in the tourism field: mobile technology, travel mode, mobile instrument, travel behavior research, mobile applications, and geo-based technology.
  • 13.1K
  • 28 Sep 2020
Topic Review
Essential Trace Elements
Trace elements produce double-edged effects on the lives of animals and particularly of humans. On one hand, these elements represent potentially toxic agents; on the other hand, they are essentially needed to support growth and development and confer protection against disease. The amount taken up and the accumulation in human tissues decisively control whether the exerted effects are toxic or beneficial. This entry provides a brief description of some toxic, likely essential and essential elements and their influence on human health.
  • 13.1K
  • 20 Aug 2020
Topic Review
Gadsden Flag
The Gadsden flag is a historical American flag with a yellow field depicting a timber rattlesnake coiled and ready to strike. Beneath the rattlesnake are the words: "Dont Tread on Me". Some modern versions of the flag include an apostrophe. The flag is named after politician Christopher Gadsden (1724–1805), who designed it in 1775 during the American Revolution. It was used by the Continental Marines as an early motto flag, along with the Moultrie flag. It is often used in the United States as a symbol for gun rights and limited government. There are Americans today that still display the Gadsden flag in support of freedom, independence, and for the United States military.
  • 13.0K
  • 22 Nov 2022
Topic Review
Plastic Sand as a Construction Material
Plastic waste pollution poses a serious environmental concern. At the same time, the cement industry is among the biggest sources of CO2 emissions, which poses another environmental challenge. Plastic sand bricks could be a workable solution for combating issues related to solid waste. The compressive strength decreased with increasing ratios of plastic to sand. Plastic sand bricks weighed less than the conventional bricks.
  • 13.0K
  • 10 Jun 2022
Topic Review
Conjugal Dictatorship
A "conjugal dictatorship" is the unofficial phrase which is used to denote the rule of Philippines president and dictator Ferdinand Marcos and his wife Imelda and it is also used to describe a type of family dictatorship. It originated in a book titled The Conjugal Dictatorship of Ferdinand Marcos and Imelda Marcos by Primitivo Mijares that was written in 1976 within a decade after the proclamation of martial law.
  • 13.0K
  • 04 Nov 2022
Topic Review
HepG2 Cell Line
HepG2 is a hepatoblastoma cell line. It is used in a wide range of studies: a model of hepatoblastoma (HB) and hepatocellular carcinoma (HCC), cytotoxicity testing and the identification of drug metabolic pathways on the liver. 
  • 13.0K
  • 20 Dec 2021
Topic Review
Geiger–Marsden Experiment
The Geiger–Marsden experiments (also called the Rutherford gold foil experiment) were a landmark series of experiments by which scientists discovered that every atom has a nucleus where all of its positive charge and most of its mass is concentrated. They deduced this by measuring how an alpha particle beam is scattered when it strikes a thin metal foil. The experiments were performed between 1908 and 1913 by Hans Geiger and Ernest Marsden under the direction of Ernest Rutherford at the Physical Laboratories of the University of Manchester.
  • 13.0K
  • 21 Oct 2022
Topic Review
Vehicular Ad Hoc Networks
The vehicular ad hoc network is an emerging area of technology that provides intelligent transportation systems with vast advantages and applications. Frequent disconnections between the vehicular nodes due to high-velocity vehicles impact network performance. 
  • 13.0K
  • 27 Sep 2022
Topic Review
Morphology of Aspergillus flavus
This entry aimed to morphologically characterize and determine the aflatoxigenic and non-aflatoxigenic Aspergillus flavus isolates. Macromorphological characteristics were determined by observing the colony color and texture, while the micromorphological characteristics were determined by examining the spore color, size, structure, conidiophore structure, and vesicle shape. The production of aflatoxin was determined by direct visualization of the UV fluorescence of A. flavus colonies on CCA. Aflatoxin was qualitatively detected in 18 (45%) isolates of A. flavus using UV fluorescence screening while the remaining 22 (55%) isolates did not exhibit any aflatoxin production. 
  • 13.0K
  • 30 Aug 2021
Topic Review
Primary Socialisation
Primary socialization in sociology is the period early in a person's life during which they initially learn and build themselves through experiences and interactions around them. This process starts at home through the family, in which one learns what is or is not accepted in society, social norms, and cultural practices that eventually one is likely to take up. Primary socialization through the family teaches children how to bond, create relationships, and understand important concepts including love, trust, and togetherness. Several agents of primary socialization involve institutions such as the family, childhood friends, the educational system, and social media. All these agents influence the socialization process of a child that they build on for the rest their life. These agents are limited to people who immediately surround a person such as friends and family—but other agents, such as social media and the educational system have a big influence on people as well. The media is an influential agent of socialization because it can provide vast amounts of knowledge about different cultures and society. It is through these processes that children learn how to behave in public versus at home, and eventually learn how they should behave as people under different circumstances; this is known as secondary socialization. A vast variety of people have contributed to the theory of primary socialization, of those including Sigmund Freud, George Herbert Mead, Charles Cooley, Jean Piaget and Talcott Parsons. However, Parson's theories are the earliest and most significant contributions to socialization and cognitive development.
  • 12.9K
  • 18 Nov 2022
Topic Review
Effect of COVID-19 Pandemic on the Fashion Industry
The preference for a specific fashion style proved to have an impact on the product, promotion, WOM and fashion lovers’ behavior during COVID-19. Moreover, those elements have an impact on the frequency of fashion apparel consumption. Based on these results, fashion companies can tailor their activities in line with the predominant style of their fashion apparel to improve their economic sustainability during the post-COVID-19 era. 
  • 12.9K
  • 06 May 2022
Topic Review
Rotary-Percussion Drilling
The rotary-percussion drilling method is a prospective way to decrease drilling costs. It is obvious, based on literature analyses and finished geothermal drilling, that the Lublin Basin can be perceived as the one where rotary-percussion drilling can be used to drill an overburden of shale rocks. The paper explained the geology of the Lublin Basin, its’ geological structures, and the possibility of the use of drilling with a down-the-hole hammer, which could significantly decrease the cost of the whole shale gas drilling investment. Data collected from the wells drilled in the Lublin Basin were compared and analyzed to determine the viability of rotary-percussion drilling. Provided analyses showed that using the rotary-percussion drilling method in the Lublin Basin had a greater possibility of application than in other Polish shale basins (Baltic and Podlasie). 
  • 12.9K
  • 28 May 2021
Topic Review
Bose Wave System
Bose Corporation's Wave Music Systems are table top audio systems which were first released in 1984. Various Wave systems comprise CD players, DAB tuners and inputs for computer sources, and in addition most models contain an AM/FM tuner. Wave systems use a folded waveguide (a series of passages from the speaker driver to the speaker grill), in an attempt to replicate sound from larger systems in a compact design. Bose claims the waveguide "produces full, clear stereo sound from a small enclosure by guiding air through two 26” folded wave guides". In 1987, Amar G. Bose and William R. Short won the Intellectual Property Owners Education Foundation's Inventor of the Year award for the waveguide loudspeaker system.
  • 12.9K
  • 20 Oct 2022
Topic Review
Generations of Glucose Biosensors
Electrochemical glucose biosensors are widely applied for glucose monitoring due to their unbeatable sensitivity, selectivity, and simplicity. In general, there are four primary generations of glucose biosensor, which are classified according to the electron transfer mechanism. Three generations represent the enzymatic glucose biosensor, and one generation represents the non-enzymatic glucose biosensor.
  • 12.9K
  • 14 Dec 2022
Topic Review
Free-Space Optical Communication
Fast communication is of high importance. Recently, increased data demand and crowded radio frequency spectrum have become crucial issues. Free-Space Optical Communication (FSOC) has diametrically changed the way people exchange information. As an alternative to wire communication systems, it allows efficient voice, video, and data transmission using a medium like air. Due to its large bandwidth, FSOC can be used in various applications and has therefore become an important part of our everyday life. The main advantages of FSOC are a high speed, cost savings, compact structures, low power, energy efficiency, a maximal transfer capacity, and applicability. The rapid development of the high-speed connection technology allows one to reduce the repair downtime and gives the ability to quickly establish a backup network in an emergency. Unfortunately, FSOC is susceptible to disruption due to atmospheric conditions or direct sunlight. Here, we briefly discuss Free-Space Optical Communication from mirrors and optical telegraphs to modern wireless systems and outline the future development directions of optical communication.
  • 12.9K
  • 11 Nov 2020
Topic Review
Saraswati
Saraswati (Sanskrit: सरस्वती, IAST: Sarasvatī) is the Hindu goddess of knowledge, music, art, speech, wisdom, and learning. She is a part of the tridevi of Saraswati, Lakshmi, and Parvati. All the three equal forms unite with the trimurti of Brahma, Vishnu, and Shiva to create, maintain, and regenerate the Universe, respectively. The earliest known mention of Saraswati as a goddess is in the Rigveda. She has remained significant as a goddess from the Vedic period through modern times of Hindu traditions. She is generally shown to have four arms, holding a book, a rosary, a water pot and a musical instrument called Veena. Each of these items have symbolic meaning in Hinduism. Some Hindus celebrate the festival of Vasant Panchami (the fifth day of spring, and also known as Saraswati Puja and Saraswati Jayanti in so many parts of India) in her honour, and mark the day by helping young children learn how to write the letters of the alphabet on that day. The Goddess is also revered by believers of the Jain religion of west and central India, as well as some Buddhist sects.
  • 12.9K
  • 05 Dec 2022
Topic Review
List of Seaplanes and Amphibious Aircraft
The following is a list of seaplanes and amphibious aircraft, which includes floatplanes and flying boats, by country of origin. Seaplanes are any aircraft that has the capability of landing on water while amphibious aircraft are equipped with wheels to alight on land, as well as being able to land on the water. Flying boats rely on the fuselage or hull for buoyancy, while floatplanes rely on external pontoons or floats. Some experimental aircraft used specially designed skis to skim across the water but did not always have a corresponding ability to float. This list does not include ekranoplans, 'Wing-In-Ground-effect' (WIG), water-skimmers, wingships or similar vehicles reliant on ground effect.
  • 12.9K
  • 07 Nov 2022
Topic Review
IKCO EF Engines
IKCO EF engines are a family of four-cylinder engines. The EF7 series are designed jointly by Iran Khodro Powertrain Company (IPCO) and F.E.V GmbH of Germany. The other models will be designed by IPCO itself. IPCO is the powertrain designing & producing company of Iranian car manufacturer Iran Khodro (IKCO). IKCO aims to supply 800,000 powertrains by 2010. The first phase of IKCO EF Engines project (EF7 Dual-Fuel) investments were about 80 million US$. EF4 & EF7 engines use CNG as their main fuel and they can also use gasoline. EFD is the first engine of the EF family that is single-fuel. It uses high-quality diesel (Euro 4 Quality or better) as fuel. EF engines share most of their parts between them. It was IKCO's aim to reduce costs and provide ease of supplying the parts in the future for after-sales services. The EF family dual-fuel and petrol-fuel engines have achieved the Euro IV emission standard and are able to achieve Euro V emission standard with some minor changes but EFD will be the first engine of the family which comes with the Euro IV emission standard as its first release, and is able to achieve the Euro VI emission standard with some changes. The most important suppliers for EF engines are INA for sensitive VVT parts and some other mechanical parts, MAHLE which supplies some important parts of the engine family such as pistons, with Bosch supplying the ECU and electrically controlled pedal and lots of other important sensitive electronic parts. Almost all of the parts (except high-tech and sensitive parts) from worldwide well-known companies (as mentioned) are produced in Iran under license with the highest required quality for the engines. The Germany company Bosch had shown interest in assembling the Iranian engine under license. In 2008 IKCO has announced that EF7 is among the three best CNG-based engines of the world in designing.
  • 12.8K
  • 01 Dec 2022
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