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Topic Review
Fuzzy Logic Control for Refrigeration Systems
Logic fuzzy systems are based on the human ability to think, which has allowed controllers to adapt better to systems by finding an approximation to their real behavior.
  • 4.4K
  • 14 Mar 2022
Topic Review
Nuclear Magnetic Resonance Spectroscopy
A description of standard NMR experiments along with some examples.
  • 4.4K
  • 03 Nov 2020
Topic Review
Acetylsalicylic Acid History and Structure
Aspirin (ASA, acetylsalicylic acid ATC code: N02BA01, DrugBank ID: DB00945, brand names: Arthritis Pain, Aspi-Cor, Aspirin 81, Aspirin-Low, Bayer Plus, Bufferin, Ecortin, Eciprin, Miniprin, Vazalore), is one of the first drugs to be obtained by synthesis. It is regarded as, being the most used drug with the longest lasting commercial success.
  • 4.4K
  • 06 Dec 2022
Topic Review
ICT Healthcare Solutions
Information and Communication Technology (ICT) solutions facilitate the monitoring and management of older people’s health to improve quality of life and physical activity with a decline in caregivers’ burden.
  • 4.4K
  • 22 Mar 2021
Topic Review
Kepler (Spacecraft)
Kepler is a space observatory launched by NASA to discover Earth-size planets orbiting other stars. Named after astronomer Johannes Kepler, the spacecraft was launched on March 7, 2009, into an Earth-trailing heliocentric orbit. The principal investigator was William J. Borucki. Designed to survey a portion of our region of the Milky Way to discover Earth-size exoplanets in or near habitable zones and estimate how many of the billions of stars in the Milky Way have such planets, Kepler's sole scientific instrument is a photometer that continually monitors the brightness of approx 150,000 main sequence stars in a fixed field of view. These data are transmitted to Earth, then analyzed to detect periodic dimming caused by exoplanets that cross in front of their host star. Kepler is part of NASA's Discovery Program of relatively low-cost, focused primary science missions. The telescope's construction and initial operation were managed by NASA's Jet Propulsion Laboratory, with Ball Aerospace responsible for developing the Kepler flight system. The Ames Research Center is responsible for the ground system development, mission operations since December 2009, and scientific data analysis. The initial planned lifetime was 3.5 years, but greater-than-expected noise in the data, from both the stars and the spacecraft, meant additional time was needed to fulfill all mission goals. Initially, in 2012, the mission was expected to be extended until 2016, but on July 14, 2012, one of the spacecraft's four reaction wheels used for pointing the spacecraft stopped turning, and completing the mission would only be possible if all other reaction wheels remained reliable. Then, on May 11, 2013, a second reaction wheel failed, disabling the collection of science data and threatening the continuation of the mission. On August 15, 2013, NASA announced that they had given up trying to fix the two failed reaction wheels. This meant the current mission needed to be modified, but it did not necessarily mean the end of planet hunting. NASA had asked the space science community to propose alternative mission plans "potentially including an exoplanet search, using the remaining two good reaction wheels and thrusters". On November 18, 2013, the K2 "Second Light" proposal was reported. This would include utilizing the disabled Kepler in a way that could detect habitable planets around smaller, dimmer red dwarfs. On May 16, 2014, NASA announced the approval of the K2 extension. (As of January 2015), Kepler and its follow-up observations had found 1,013 confirmed exoplanets in about 440 star systems, along with a further 3,199 unconfirmed planet candidates.[upper-alpha 2] Four planets have been confirmed through Kepler's K2 mission. In November 2013, astronomers estimated, based on Kepler space mission data, that there could be as many as 40 billion rocky, Earth-size exoplanets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. It is estimated that 11 billion of these planets may be orbiting Sun-like stars. The nearest such planet may be 3.7 parsecs (12 ly) away, according to the scientists. On January 6, 2015, NASA announced the 1,000th confirmed exoplanet discovered by the Kepler Space Telescope. Four of the newly confirmed exoplanets were found to orbit within habitable zones of their related stars: three of the four, Kepler-438b, Kepler-442b and Kepler-452b, are almost Earth-size and likely rocky; the fourth, Kepler-440b, is a super-Earth. On May 10, 2016, NASA verified 1,284 new exoplanets found by Kepler, the single largest finding of planets to date. Kepler data has also helped scientists observe and understand supernovae; measurements were collected every half-hour so the light curves were especially useful for studying these types of astronomical events.
  • 4.4K
  • 20 Oct 2022
Biography
Rube Goldberg
File:Something for nothing (1940).ogv Reuben Garrett Lucius Goldberg (July 4, 1883 – December 7, 1970), known best as Rube Goldberg, was an American cartoonist, sculptor, author, engineer, and inventor. Goldberg is best known for a series of popular cartoons depicting complicated gadgets that perform simple tasks in indirect, convoluted ways, giving rise to the term Rube Goldberg machines for
  • 4.4K
  • 16 Nov 2022
Topic Review
Datasets in the Field of Click Fraud Detection
Researchers go over the most relevant datasets to detect and prevent ad click fraud using AI techniques. Private/non-open-source datasets, as well as those related to other fraud types, such as ad or impression fraud, are excluded. 
  • 4.4K
  • 13 Feb 2023
Topic Review
Caste Spaces in Pakistan
This study is an attempt to understand the appropriation of spaces of Dalits by Sindhi progressive activists and short story writers in Pakistan as they construct or rather undermine caste at the anvil of religion and gender to reframe their own religio-political agenda premised on political Sufism or Sufi nationalism. I specifically discuss the narratives emergent of the three popular short stories that are reframed as having exceptional emancipatory potential for the Dalits.  Assessing the emancipatory limits of Sindhi progressive narrative, I argue while that the short stories purport to give fuller expression to religious, gender-based and class dimension of the problematic, it elides the problem of casteism and the subsequent existential demand of Dalit emancipation.  Given the hegemonic influence of local Ashrafia class, the internal caste frictions are glossed over through political Sufism or Sindhi nationalism. This gloss of politicised Sufism hampers Dalit agency and rather facilitates the appropriation of Dalit spaces by Ashrafia class. This leads to conclude that the seemingly progressive literary-political narratives framed in religio-political idiom may offer to the oppressed not more than a token sympathy, compassion, self-pity and false pride in legends. Instead, they allow the appropriation of spaces and events of the oppressed, and the objectification of oppressed bodies by the oppressor.
  • 4.4K
  • 05 Jan 2021
Topic Review Peer Reviewed
Inhabited Institutionalism
Inhabited Institutionalism is a meso-level theoretical approach for evaluating the recursive relationships among institutions, social interactions, and organizations. This theoretical framework offers organizational scholars a multi-faceted consideration of coupling configurations that highlight how institutional processes are maintained, challenged, and transformed without reverting to nested yet binary arguments about individual agency and structural conditions.
  • 4.4K
  • 18 Aug 2022
Topic Review
Xylitol’s Benefits to Skin
Xylitol has been widely documented to have dental health benefits, such as reducing the risk for dental caries. In skin, xylitol has been reported to improve barrier function and suppress the growth of potential skin pathogens. 
  • 4.4K
  • 06 Oct 2021
Topic Review
Nasal Mucosa Injury
Nasal mucosa injury can be caused by trauma, radiotherapy, chronic infection such as sinusitis, and post sinus surgery. The rate of healing and its treatment are important in the recovery of patients especially in post sinus surgery, which introduces new injuries.
  • 4.4K
  • 28 Apr 2022
Topic Review
Domestic Cat
The domestic cat, scientifically known as Felis catus, is a small carnivorous mammal that has been domesticated for thousands of years. Beloved by many as pets, domestic cats exhibit a wide range of coat colors and patterns, varying in size and temperament. Originating from wildcat ancestors, domestic cats have adapted to various environments worldwide, forming close bonds with humans while retaining some of their ancestral behaviors.
  • 4.4K
  • 28 Feb 2024
Topic Review
Biocontrol Agents
Biocontrol agents (BCAs) are living organisms and their derivatives that act against plant diseases and pests via direct antagonistic effects but also indirectly via the induction of plant resistance. They have been proposed as an alternative to standard fungicides but their disease management capacity is usually incomplete and heavily relies on uncontrollable environmental conditions. An integrated approach of combining BCAs with fungicides can reduce the fungicide doses to manage plant diseases and thereby their residual effects that affect the environment and human health.
  • 4.4K
  • 16 Dec 2020
Topic Review
Big-Box Store
A big-box store (also supercenter, superstore, or megastore) is a physically large retail establishment, usually part of a chain of stores. The term sometimes also refers, by extension, to the company that operates the store. The store may sell general dry goods, in which case it is a department store, or may be limited to a particular specialty (such establishments are often called "category killers") or may also sell groceries, in which case some countries (mostly in Europe) use the term hypermarket. Typical architectural characteristics include the following: Commercially, big-box stores can be broken down into two categories: general merchandise (examples include Walmart, Kmart and Target), and specialty stores (such as Home Depot, Barnes & Noble, or Best Buy) which specialize in goods within a specific range, such as hardware, books, or consumer electronics respectively. In the late 20th and early 21st centuries, many traditional retailers—such as Tesco and Praktiker opened stores in the big-box-store format in an effort to compete with big-box chains, which are expanding internationally as their home markets reach maturity.
  • 4.4K
  • 26 Oct 2022
Topic Review
Acetylcholinesterase Inhibitors
Acetylcholinesterase (AChE) inhibitors are the only drugs that have demonstrated success in slowing shrinkage (atrophy) of the cortex, hippocampus, and basal forebrain, major areas of Alzheimer's disease (AD)-associated brain damage and dementia. The main barrier to taking advantage of this new success in treating, or even preventing, AD is that the old available AChE inhibitors are weak reversible inhibitors that cause intolerable nausea, vomiting, and diarrhea if given in the higher doses needed. A promising new strategy for producing high-level AChE inhibition in the brain as needed for effective treatment of AD is the use of AChE inhibitors that are of a different type, the  irreversible inhibitors. 
  • 4.4K
  • 28 Oct 2020
Topic Review Peer Reviewed
Fungal Secondary Metabolism
Fungal secondary metabolites (SMs) comprise a vast collection of compounds expendable for these organisms under laboratory conditions. They exhibit enormous chemical diversity, and usually belong to four major families: terpenoids, polyketides, non-ribosomal peptides, or a combination of the last two. Their functions are very diverse and are normally associated with a greater fitness of the producing fungi in their environment, which often compete with other microorganisms or interact with host plants. Many SMs have beneficial applications, e.g., as antibiotics or medical drugs, but others, known as mycotoxins, are harmful to health.
  • 4.4K
  • 13 Apr 2022
Topic Review
BlackBerry Messenger
BlackBerry Messenger, also known as BBM, is a proprietary Internet-based instant messenger and videotelephony application included on BlackBerry devices that allows messaging and voice calls between BlackBerry, iOS, Android, and Windows Mobile users. The consumer edition is currently developed by Emtek under license from BlackBerry Limited (formerly known as Research In Motion), and was first released in August 2005. Messages sent via BlackBerry Messenger are sent over the Internet and use the BlackBerry PIN system. Many service providers allow sign-in to BlackBerry Messenger using a dedicated BlackBerry data plan. Exchanging messages is possible to a single person or via dedicated discussion or chat groups, which allow multiple BlackBerry devices to communicate in a single session. In addition to offering text-based instant messages, BlackBerry Messenger also allows users to send pictures, voicenotes (audio recordings), files (up to 16 MB), share real time location on a map, stickers and a wide selection of emoticons. Communication was only possible between BlackBerry devices until late 2013 when BBM was released on iOS and Android systems. 300 million Stickers have been shared. Daily, 150,000 BBM Voice Calls are placed. There are more than 190 million BBM users worldwide as of 2015, and BlackBerry infrastructure handled 30 petabytes of data traffic each month by early 2013. BBM was very popular in the late 2000s and the break of the decade, before it started to lose out to rivals like Apple's iMessage and the cross-platform service WhatsApp. As of April 2016, Indonesia is the only country where BBM is the most popular messaging app - installed on 87.5% of Android devices in the country.
  • 4.4K
  • 25 Oct 2022
Topic Review
Saudi Arabian Plants
The kingdom of Saudi Arabia (SA) ranks fifth in Asia in terms of area. It features broad biodiversity, including interesting flora, and was the historical origin of Islam. It is endowed with a large variety of plants, including many herbs, shrubs, and trees. Many of these plants have a long history of use in traditional medicine.
  • 4.4K
  • 13 Jan 2023
Topic Review
Dowel-Type Joints in Timber Structures
Dowel-type joints are one of the most common connectors. They basically consist of one or more cylindrical steel dowels inserted into aligned holes of different elements. The dowels transmit loads between the elements, being subjected to opposite compressive forces on the contact area with each element. This causes the dowels to work under bending moments and shear forces. There is an almost infinite number of possible configurations for dowel-type joints.
  • 4.4K
  • 09 Oct 2021
Topic Review
Fenbendazole Fever
Fenbendazole (FZ) is a benzimidazole carbamate drug with broad-spectrum antiparasitic activity in humans and animals. The mechanism of action of FZ is associated with microtubular polymerization inhibition and glucose uptake blockade resulting in reduced glycogen stores and decreased ATP formation in the adult stages of susceptible parasites. 
  • 4.4K
  • 10 Nov 2022
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