Summary

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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E-reader
An e-reader, also called an e-book reader or e-book device, is a mobile electronic device that is designed primarily for the purpose of reading digital e-books and periodicals. Any device that can display text on a screen may act as an e-reader; however, specialized e-reader devices may optimize portability, readability, and battery life for this purpose. Their main advantage over printed books is portability. This is because an e-reader is capable of holding thousands of books while weighing less than one book, and the convenience provided due to add-on features.
  • 6.3K
  • 21 Oct 2022
Topic Review
A Message from Earth (2008)
A Message from Earth (AMFE) is a high-powered digital radio signal that was sent on 9 October 2008 towards Gliese 581c, a large terrestrial extrasolar planet orbiting within the Gliese 581 system. The signal is a digital time capsule containing 501 messages that were selected through a competition on the social networking site Bebo. The message was sent using the RT-70 radar telescope. The signal will reach the planet Gliese 581c in early 2029. More than half a million people including celebrities and politicians participated in the AMFE project, which was the world's first digital time capsule where the content was selected by the public. As of 1 February 2018, the message has traveled 62.43 trillion kilometers of the total 192 trillion kilometers, which is 33.5% of the distance to the Gliese 581 system. On 13 February 2015, scientists (including David Grinspoon, Seth Shostak, and David Brin) at an annual meeting of the American Association for the Advancement of Science, discussed Active SETI and whether transmitting a message to possible intelligent extraterrestrials in the Cosmos was a good idea; That same week, a statement was released, signed by many in the SETI community, that a "worldwide scientific, political and humanitarian discussion must occur before any message is sent". However neither Frank Drake, nor Seth Shostak signed this appeal. On 28 March 2015, a related essay with some different point of view was written by Seth Shostak and published in The New York Times .
  • 4.4K
  • 21 Oct 2022
Topic Review
Propagation Graph
Propagation Graphs are a mathematical modelling method for radio propagation channels. A propagation graph is a signal flow graph in which vertices represent transmitters, receivers or scatterers, and edges models propagation conditions between vertices. Propagation graph models were initially developed in for multipath propagation in scenarios with multiple scattering, such as indoor radio propagation. It has later been applied in many other scenarios.
  • 1.9K
  • 21 Oct 2022
Topic Review
Borealopelta
Borealopelta (meaning "Northern shield") is a genus of nodosaurid ankylosaur from the Early Cretaceous of Alberta, Canada . It contains a single species, B. markmitchelli, named in 2017 by Caleb Brown and colleagues from a well-preserved specimen known as the Suncor nodosaur. Discovered at an oil sands mine north of Fort McMurray, Alberta, that is owned by the Suncor Energy company, the specimen is remarkable for being among the best preserved dinosaur fossils of its size ever found. It preserved not only the armor (osteoderms) in their life positions, but also remains of their keratin sheaths and overlying skin. Melanosomes were also found that indicate a countershaded reddish skin tone.
  • 1.8K
  • 21 Oct 2022
Topic Review
Artificial Gravity in Fiction
Artificial gravity is a common theme in fiction, particularly science fiction.
  • 7.6K
  • 21 Oct 2022
Topic Review
MV Penguin
MV Penguin was an American cargo liner in commission in the fleet of the United States Bureau of Fisheries from 1930 to 1940 and in the fleet of the U.S. Fish and Wildlife Service from 1940 to 1950. She ran a passenger-cargo service between Seattle, Washington (state) , and the Pribilof Islands, and provided transportation between the two inhabited Pribilofs, Saint Paul Island and St. George Island. She also carried passengers, supplies, and provisions to destinations on the mainland of the Territory of Alaska and in the Aleutian Islands. She occasionally supported research activities in Alaskan waters and the North Pacific Ocean.
  • 925
  • 25 Oct 2022
Topic Review
CSE HTML Validator
CSE HTML Validator (now renamed to CSS HTML Validator) is an HTML editor and CSS editor for Windows (and Linux when used with Wine) that helps web developers create syntactically correct and accessible HTML, XHTML, and CSS documents (including HTML5 and CSS3) by locating errors, potential problems, and common mistakes. It is also able to check links, suggest improvements, alert developers to deprecated, obsolete, or proprietary tags, attributes, and CSS properties, and find issues that can affect search engine optimization. CSS HTML Validator is developed, marketed, and sold by AI Internet Solutions LLC located in Texas . The first version of CSS HTML Validator was released in 1997 for Windows 95. The current version is 2020/v20 (as of January 20, 2020) and is for Windows 7 or above. There are four major editions of CSS HTML Validator — Enterprise, Professional, Home/Standard, and Lite. While the application is generally a commercial product (except for the lite edition), a free version of the standard edition is available for personal, non-commercial use.
  • 679
  • 21 Oct 2022
Topic Review
Min Chinese
Min (simplified Chinese: 闽语; traditional Chinese: 閩語; pinyin: Mǐn yǔ; Pe̍h-ōe-jī: Bân gú; BUC: Mìng ngṳ̄) is a broad group of Sinitic languages spoken by about 30 million people in Fujian province as well as by the descendants of Min speaking colonists on Leizhou peninsula and Hainan, or assimilated natives of Chaoshan, parts of Zhongshan, three counties in southern Wenzhou, Zhoushan archipelago, and Taiwan. The name is derived from the Min River in Fujian, which is also the abbreviated name of Fujian Province. Min varieties are not mutually intelligible with each other or with any other variety of Chinese. There are many Min speakers among overseas Chinese in Southeast Asia. The most widely spoken variety of Min outside Fujian is Southern Min (Min Nan), also known as Hokkien-Taiwanese (which includes Taiwanese and Amoy). Many Min languages have retained notable features of the Old Chinese language, and there is linguistic evidence that not all Min varieties are directly descended from Middle Chinese of the Sui–Tang dynasties. Min languages are believed to have a significant linguistic substrate from the languages of the inhabitants of the region prior to its sinicization.
  • 3.6K
  • 21 Oct 2022
Topic Review
MMR Vaccine Controversy
A controversy surrounding the combined measles, mumps, and rubella (MMR) vaccine started with the 1998 publication of a fraudulent research paper in The Lancet linking the vaccine to colitis and autism spectrum disorders. The claims in the paper were widely reported, leading to a sharp drop in vaccination rates in the UK and Ireland and increases in the incidence of measles and mumps, resulting in deaths and serious permanent injuries. Following the initial claims in 1998, multiple large epidemiological studies were undertaken. Reviews of the evidence by the Centers for Disease Control and Prevention, the American Academy of Pediatrics, the Institute of Medicine of the US National Academy of Sciences, the UK National Health Service, and the Cochrane Library all found no link between the MMR vaccine and autism. An investigation by journalist Brian Deer found that Andrew Wakefield, the author of the original research paper linking the vaccine to autism, had multiple undeclared conflicts of interest, had manipulated evidence, and had broken other ethical codes. The Lancet paper was partially retracted in 2004 and fully retracted in 2010, when Lancet's editor-in-chief Richard Horton described it as "utterly false" and said that the journal had been deceived. Wakefield was found guilty by the General Medical Council of serious professional misconduct in May 2010 and was struck off the Medical Register, meaning he could no longer practise as a doctor in the UK. In 2011, Deer provided further information on Wakefield's improper research practices to the British Medical Journal, which in a signed editorial described the original paper as fraudulent. The scientific consensus is that there is no link between the MMR vaccine and autism and that the vaccine's benefits greatly outweigh its risks. Wakefield's paper was described as "perhaps, the most damaging medical hoax of the last 100 years". Physicians, medical journals, and editors have described Wakefield's actions as fraudulent and tied them to epidemics and deaths.
  • 4.4K
  • 21 Oct 2022
Topic Review
Mitochondrial Disease
Mitochondrial disease is a group of disorders caused by mitochondrial dysfunction. Mitochondria are the organelles that generate energy for the cell and are found in every cell of the human body except red blood cells. They convert the energy of food molecules into the ATP that powers most cell functions. Mitochondrial diseases take on unique characteristics both because of the way the diseases are often inherited and because mitochondria are so critical to cell function. A subclass of these diseases that have neuromuscular symptoms are known as mitochondrial myopathies.
  • 2.2K
  • 25 Oct 2022
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