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HandWiki is the world's largest wiki-style encyclopedia dedicated to science, technology and computing. It allows you to create and edit articles as long as you have external citations and login account. In addition, this is a content management environment that can be used for collaborative editing of original scholarly content, such as books, manuals, monographs and tutorials.

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Epithelioid Cell
According to a common point of view Epithelioid cells (also called Epithelioid histiocytes) are derivatives of activated macrophages resembling epithelial cells.
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  • 04 Nov 2022
Topic Review
Muscle Memory
Muscle memory is a form of procedural memory that involves consolidating a specific motor task into memory through repetition, which has been used synonymously with motor learning. When a movement is repeated over time, a long-term muscle memory is created for that task, eventually allowing it to be performed with little to no conscious effort. This process decreases the need for attention and creates maximum efficiency within the motor and memory systems. Muscle memory is found in many everyday activities that become automatic and improve with practice, such as riding bicycles, driving motor vehicles, playing ball sports, typing on keyboards, entering PINs, playing musical instruments, poker, martial arts, and dancing.
  • 3.9K
  • 04 Nov 2022
Topic Review
Traditional African Medicine
Traditional African medicine is a range of traditional medicine disciplines involving indigenous herbalism and African spirituality, typically including diviners, midwives, and herbalists. Practitioners of traditional African medicine claim to be able to cure a variety of diverse conditions including cancer, psychiatric disorders, high blood pressure, cholera, most venereal diseases, epilepsy, asthma, eczema, fever, anxiety, depression, benign prostatic hyperplasia, urinary tract infections, gout, and healing of wounds and burns and even Ebola. Diagnosis is reached through spiritual means and a treatment is prescribed, usually consisting of a herbal remedy that is considered to have not only healing abilities but also symbolic and spiritual significance. Traditional African medicine, with its belief that illness is not derived from chance occurrences, but through spiritual or social imbalance, differs greatly from modern scientific medicine, which is technically and analytically based. In the 21st century, modern pharmaceuticals and medical procedures remain inaccessible to large numbers of African people due to their relatively high cost and concentration of health facilities in urban centres. Traditional medicine was the dominant medical system for millions of people in Africa prior the arrival of the Europeans, who introduced western-based medicine, which was a noticeable turning point in the history of this tradition and culture. Herbal medicines in Africa are generally not adequately researched, and are weakly regulated. There is a lack of the detailed documentation of the traditional knowledge, which is generally transferred orally. Serious adverse effects can result from mis-identification or misuse of healing plants. The geographical reach of this article is Sub-Saharan Africa. Though, of course neighbouring medical traditions influenced traditional African medicine.
  • 1.8K
  • 04 Nov 2022
Topic Review
Digital Pathology
Digital pathology is a sub-field of pathology that focuses on data management based on information generated from digitized specimen slides. Through the use of computer-based technology, digital pathology utilizes virtual microscopy. Glass slides are converted into digital slides that can be viewed, managed, shared and analyzed on a computer monitor. With the practice of Whole-Slide Imaging (WSI), which is another name for virtual microscopy, the field of digital pathology is growing and has applications in diagnostic medicine, with the goal of achieving efficient and cheaper diagnoses, prognosis, and prediction of diseases due to the success in Artificial Intelligence and Machine Learning.
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  • 04 Nov 2022
Topic Review
Aether Drag Hypothesis
In the 19th century, the theory of the luminiferous aether as the hypothetical medium for the propagation of light was widely discussed. An important part of this discussion was the question concerning the state of motion of Earth with respect to this medium. The aether drag hypothesis dealt with the question of whether or not the luminiferous aether is dragged by or entrained within moving matter. According to the first variant no relative motion exists between Earth and aether; according to the second one, relative motion exists and thus the speed of light should depend on the speed of this motion ("aether wind"), which should be measurable by instruments at rest on Earth's surface. Specific aether models were invented by Augustin-Jean Fresnel who in 1818 proposed that the aether is partially entrained by matter. The other one was proposed by George Stokes in 1845, in which the aether is completely entrained within or in the vicinity of matter. While Fresnel's almost stationary theory was apparently confirmed by the Fizeau experiment (1851), Stokes' theory was apparently confirmed by the Michelson–Morley experiment (1881, 1887). This contradictory situation was resolved by the works of Hendrik Antoon Lorentz (1895, 1904) whose Lorentz ether theory banished any form of aether dragging, and finally with the work of Albert Einstein (1905) whose theory of special relativity does not contain the aether as a mechanical medium at all.
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  • 04 Nov 2022
Topic Review
KinITC
The method kinITC for kinetic Isothermal Titration Calorimetry is an extension of the classical ITC technique in view of obtaining kinetic information in addition to thermodynamic information. It has been described in full in, and in a simplified and less general form in.
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  • 04 Nov 2022
Topic Review
Types of Snow
Types of snow can be designated by the shape of its flakes, description of how it is falling, and by how it collects on the ground. A blizzard and snow storm indicate heavy snowfalls over a large area, snow squalls give heavy snowfalls over narrow bands, while flurries are used for the lightest snowfall. Types which fall in the form of a ball, rather than a flake, are known as graupel, with sleet and snow grains as types of graupel. Once on the ground, snow can be categorized as powdery when fluffy, granular when it begins the cycle of melting and refreezing, and crud or eventually ice once it packs down into a dense drift after multiple melting and refreezing cycles. When powdering, snow drifts with the wind or ground blizzard, sometimes to the depth of several metres. After attaching to hillsides, blown snow can evolve into a snow slab, which is an avalanche hazard on steep slopes.
  • 4.1K
  • 04 Nov 2022
Topic Review
GSIS-Meralco Bribery Case
The GSIS-Meralco case is a political controversy and pending legal case being heard by the Supreme Court of the Philippines. This complex case began with a complaint filed by the Philippines' Government Service Insurance System (GSIS) with the Securities and Exchange Commission of the Philippines (SEC) questioning the unvalidated proxy votes used by the Lopez family in a board election of the Manila Electric Company (Meralco). The SEC issued a cease and desist order (CDO) against Meralco, which was ignored by the latter. A show cause order (SCO) was then issued by the SEC, whereupon Meralco petitioned the Court of Appeals, questioning the jurisdiction of the SEC. The Court of Appeals issued a temporary restraining order (TRO) to the SEC while the Special 9th Division composed of Associate Justices Vicente Q. Roxas, Jose L. Sabio Jr. and Myrna Dimaranan Vidal heard the case. Roxas was assigned as the ponente while Sabio was the acting chairman. Later, Sabio called a press conference and alleged that an emissary of Meralco tried to bribe him with ₱10 million to have a case transferred to another appeals court justice. The criminal charges are obstruction of justice and malfeasance in office. Sabio did not mention any names, but businessman Francis de Borja stepped forward and claimed that he was the alleged emissary, accusing Sabio of asking for a ₱50 million bribe to side with Meralco, in response to De Borja's question “What will it take for you to resist the government’s offer?” The alleged government offer was a Supreme Court position. In the latter course of the investigation, Sabio let slip that his brother, Presidential Commission on Good Government (PCGG) Chairman Camilo Sabio, called him up twice to urge him to side favorably with the government. The late admission of the allegedly unethical and criminal action called into doubt the innocence of Sabio in coming forward with his expose and the veracity of his entire story. These acts are alleged to be punishable under Article 208 and 243 of the Revised Penal Code respectively. It also came out during the course of the Supreme Court investigation that Court of Appeals Justice Vicente Roxas, the ponente of the controversial Meralco decision, had himself committed improprieties. One such impropriety was that Roxas preempted the legal opinion of Presiding Justice Conrado Vasquez that the Special 9th Division should have ruled on the case as per the Internal Rules of the Court of Appeals (IRCA), and not the 8th Division to which Roxas was transferred, and which eventually promulgated a ruling in favor of Meralco, with Justices Reyes and Apolinario Bruselas hastily signing the ponencia without going over or reading the memoranda submitted by concerned parties. The Supreme Court, voting 12–1, ordered the dismissal of Roxas after he was found guilty of multiple violations of the canons of the Code of Judicial Conduct, grave misconduct, dishonesty, undue interest and conduct prejudicial to the best interest of service. Sabio was suspended for two months after he was found guilty of simple misconduct and conduct unbecoming of a justice of the CA. Vasquez was severely reprimanded “for his failure to act promptly and decisively in order to avert the incidence that damaged the image of the Court of Appeals,” Reyes was found guilty of simple misconduct with mitigating circumstance, and Vidal was found guilty of conduct unbecoming of a justice of the appellate court for being “too compliant" when she allowed herself to sign the decision without reading the parties’ memorandum.
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  • 04 Nov 2022
Topic Review
Pax (Command)
Pax is an archiving utility available for various operating systems and defined since 1995. Rather than sort out the incompatible options that have crept up between tar and cpio, along with their implementations across various versions of Unix, the IEEE designed new archive utility pax that could support various archive formats with useful options from both archivers. The pax command is available on Unix and Unix-like operating systems and on IBM i, Microsoft Windows NT, and Windows 2000. In 2001, IEEE defined a new pax format which is basically tar with additional extended attributes. The format is not supported by pax commands in most Linux distributions and in FreeBSD, but it is supported by tar commands from GNU and FreeBSD; the format is further supported by pax commands in AIX, Solaris and HP-UX. The name "pax" is an acronym for portable archive exchange. The command invocation and structure is somewhat a unification of both tar and cpio.
  • 2.0K
  • 04 Nov 2022
Topic Review
Coelophysis Rhodesiensis
Coelophysis rhodesiensis is an extinct species of coelophysid theropod dinosaur that lived approximately 188 million years ago during the early part of the Jurassic Period in what is now Africa. The species was a small to medium-sized, lightly built, ground-dwelling, bipedal carnivore, that could grow up to 3 m (9.8 ft) long. It was formerly called Syntarsus, but that name was already taken by a beetle, and was subsequently given the name Megapnosaurus by Ivie, Ślipiński & Węgrzynowicz, in 2001, though many subsequent studies have classified it in the genus Coelophysis.
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  • 04 Nov 2022
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