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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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Copper Deficiency
Copper deficiency, or hypocupremia, is defined either as insufficient copper to meet the needs of the body, or as a serum copper level below the normal range. The neurodegenerative syndrome of copper deficiency has been recognized for some time in ruminant animals, in which it is commonly known as "swayback". Copper deficiency can manifest in parallel with vitamin B12 and other nutritional deficiencies.
  • 1.2K
  • 18 Oct 2022
Topic Review
Daighi Tongiong Pingim
Daī-ghî tōng-iōng pīng-im (Taiwanese phonetic transcription system, abbr: DT; Chinese: 臺語通用拼音) is an orthography in the Latin alphabet for Taiwanese Hokkien based upon Tongyong Pinyin. It is able to use the Latin alphabet to indicate the proper variation of pitch with nine diacritic symbols.
  • 520
  • 18 Oct 2022
Topic Review
Precambrian Supereon
The Precambrian (or Pre-Cambrian, sometimes abbreviated pЄ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic eon, which is named after Cambria, the Latinised name for Wales, where rocks from this age were first studied. The Precambrian accounts for 88% of the Earth's geologic time. The Precambrian (colored green in the timeline figure) is an informal unit of geologic time, subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago (Ga) to the beginning of the Cambrian Period, about 541 million years ago (Ma), when hard-shelled creatures first appeared in abundance.
  • 7.3K
  • 18 Oct 2022
Topic Review
Severe Acute Respiratory Syndrome Coronavirus
Severe Acute respiratory syndrome coronavirus (SARS-CoV or SARS-CoV-1) is a strain of virus that causes severe acute respiratory syndrome (SARS). It is an enveloped, positive-sense, single-stranded RNA virus which infects the epithelial cells within the lungs. The virus enters the host cell by binding to angiotensin-converting enzyme 2. It infects humans, bats, and palm civets. On 16 April 2003, following the outbreak of SARS in Asia and secondary cases elsewhere in the world, the World Health Organization (WHO) issued a press release stating that the coronavirus identified by a number of laboratories was the official cause of SARS. The Centers for Disease Control and Prevention (CDC) in the United States and National Microbiology Laboratory (NML) in Canada identified the SARS-CoV-1 genome in April 2003. Scientists at Erasmus University in Rotterdam, the Netherlands, demonstrated that the SARS coronavirus fulfilled Koch's postulates, thereby confirming it as the causative agent. In the experiments, macaques infected with the virus developed the same symptoms as human SARS victims. A similar virus was discovered in December 2019. This virus, named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is the causative pathogen of the ongoing COVID-19 pandemic.
  • 841
  • 18 Oct 2022
Topic Review
Boyce Thompson Arboretum State Park
Boyce Thompson Arboretum is the largest and oldest botanical garden in the state of Arizona. It is one of the oldest botanical institutions west of the Mississippi. Founded in 1924 as a desert plant research facility and “living museum”, the Arboretum is located in the Sonoran Desert on 392 acres (158.6 ha) along Queen Creek and beneath the towering volcanic remnant, Picketpost Mountain. Boyce Thompson Arboretum is on U.S. Highway 60, an hour's drive east from Phoenix and 3 miles (4.8 km) west of Superior, Arizona. The Arboretum has a visitor center, gift shop, research offices, greenhouses, a demonstration garden, picnic area, and a looping 1.5-mile (2.4 km) primary trail that leads visitors through various exhibits and natural areas. The exhibits include a cactus garden, palm and eucalyptus groves, an Australian exhibit, South American exhibit, aloe garden and an herb garden. There are also side trails such as the Chihuahuan Trail, Curandero Trail, and High Trail. Over 2600 species of arid land plants from around the world grow at the Arboretum. Agaves, aloes, boojum trees, cork oaks, jujube trees, legume trees, and, in the Eucalyptus grove, one of the largest red gum Eucalyptus trees ("Mr. Big") in the United States. Cacti and succulents grow extensively throughout the Arboretum. Because the BTA is a riparian zone, the park attracts Sonoran Desert wildlife and migrating birds. Visitors have seen bobcats, javelinas, coatimundis, rattlesnakes, gila monsters, hawks, hummingbirds, and vultures. 270 bird species have been spotted in the park and the Audubon Society has designated the Arboretum as an Important Bird Area. Currently the Arboretum has 5,000 members and attracts over 75,000 people annually.
  • 821
  • 18 Oct 2022
Topic Review
POWER10
POWER10 designates a proposed superscalar, multithreading, multi-core microprocessor family, based on the open source Power ISA, and announced in August 2020 at the Hot Chips conference; systems with POWER10 CPUs are intended to reach customers in the fourth quarter of 2021. The processor is designed to have 15 cores available, but a spare core will be included during manufacture to cost-effectively allow for yield issues. POWER10-based processors will be manufactured by Samsung using a 7 nm process with 18 layers of metal and 18 billion transistors on a 602 mm2 silicon die. The main features of POWER10 are higher performance per watt, and better memory and I/O architectures, with a focus on artificial intelligence (AI) workloads.
  • 2.0K
  • 18 Oct 2022
Topic Review
Purple Economy
The purple economy is that part of the economy which contributes to sustainable development by promoting the cultural potential of goods and services. “The purple economy refers to taking account of cultural aspects in economics. It designates an economy that adapts to the human diversity in globalization and that relies on the cultural dimension to give value to goods and services.”
  • 5.3K
  • 18 Oct 2022
Topic Review
Undue Influence
Undue influence (UI) is a psychological process by which a person's free will is supplanted by that of another. It is a legal term and the strict definition varies by jurisdiction. Generally speaking, it is a means by which a person gains control over their victim's decision making through tactics and unfair pressure, typically for financial gain. Historically, UI has been poorly understood, even in legal circles. Undue influence occurs behind closed doors and there are often no witnesses. UI is typically perpetrated by a person trusted by the victim and is dependent on them for emotional and physical needs. Anyone may be guilty of undue influence and is often a paid or unpaid caregiver, but may also be an attorney, accountant, nursing home attendant, neighbor, or even the victims' children. Undue influence is a process, not a single event; the influencer may spend weeks, months, or even years "grooming" and manipulating their victim. Anyone is susceptible to undue influence, but the elderly are particularly vulnerable. A distinction is made between the nature of capacity and undue influence. In assessing capacity, the practitioner evaluates an individual's ability to competently perform tasks (e.g., execute a will or give medical consent). These assessments give insight to the functioning of the cognitive capabilities at that moment in time. Conversely, screening for undue influence is focused on the process of events which occur over an extended period. To determine whether another person is leveraging unfair tactics on the victim, an assessment particular to undue influence is required. Undue influence occurs in various circumstances including: domestic violence, hostage situations, cults, prisoners of war, and dictatorships. The common theme among these situations is the aspect of psychological manipulation. Traumatic bonding occurs between the victim and the influencer, as a result, victims are unaware they're being manipulated and will often defend the perpetrator. Gaining independence from the influencer is required if the victim is to recover from the effects of UI, much like victim's of Stockholm syndrome, cults, and kidnapping. The effectiveness of cult tactics on young and healthy individuals illustrates that anyone, regardless of mental status, is a potential victim of UI under certain circumstances. Elderly Americans are living longer, and with this increased life expectancy, the prevalence of cognitive disorders associated with advanced age has also increased. A significant concentration of wealth is controlled by this aging demographic. As modern families become more complex and dispersed, and people are living longer, the likelihood of will contests involving undue influence is expected to increase.
  • 1.9K
  • 18 Oct 2022
Topic Review
Leading Edge Cuff
A leading edge cuff is a fixed aerodynamic wing device employed on fixed-wing aircraft to improve the stall and spin characteristics. Cuffs may be either factory-designed or an after-market add-on modification. A leading edge cuff is a wing leading edge modification, usually a lightly drooped outboard leading-edge extension. In most cases of outboard leading edge modification, the wing cuff starts about 50–70% half-span and spans the outer leading edge of the wing. The main goal is to produce a more gradual and gentler stall onset, without any spin departure tendency, particularly where the original wing has a sharp/asymmetric stall behaviour with a passive, non-moving, low-cost device that would have a minimal impact on performance. A further benefit is to lowering stall speed, with lower approach speeds and shorter landing distances. They may also, depending on cuff location, improve aileron control at low speed.
  • 1.3K
  • 18 Oct 2022
Topic Review
Allan McLeod Cormack
Allan MacLeod Cormack (February 23, 1924 – May 7, 1998) was a South African American physicist who won the 1979 Nobel Prize in Physiology or Medicine (along with Godfrey Hounsfield) for his work on X-ray computed tomography (CT).
  • 1.3K
  • 18 Oct 2022
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