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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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Medical Ventilator
A medical ventilator (or simply ventilator in context) is a machine designed to provide mechanical ventilation by moving breathable air into and out of the lungs, to deliver breaths to a patient who is physically unable to breathe, or breathing insufficiently. While modern ventilators are computerized machines, patients can be ventilated with a simple, hand-operated bag valve mask. Ventilators are chiefly used in intensive care medicine, home care, and emergency medicine (as standalone units) and in anesthesiology (as a component of an anesthesia machine). Medical ventilators are sometimes colloquially called "respirators", a term stemming from commonly used devices in the 1950s (particularly the "Bird Respirator"). However, in modern hospital and medical terminology, these machines are never referred to as respirators, and use of "respirator" in this context is now a deprecated anachronism signaling technical unfamiliarity. In the present-day medical field, the word "respirator" refers to a protective face mask.
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  • 30 Nov 2022
Topic Review
The Consolation of Philosophy
The Consolation of Philosophy (Latin: De consolatione philosophiae) is a philosophical work by the Roman statesman Boethius, written in 523 AD. It has been described as the single most important and influential work in the West on Medieval and early Renaissance Christianity, as well as the last great Western work of the Classical Period.
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  • 30 Nov 2022
Topic Review
Theosophy (Boehmian)
Theosophy, also known as Christian theosophy and Boehmian theosophy, refers to a range of positions within Christianity which focus on the attainment of direct, unmediated knowledge of the nature of divinity and the origin and purpose of the universe. They have been characterized as mystical and occultist philosophies. Theosophy is considered part of Western esotericism, which believes that hidden knowledge or wisdom from the ancient past offers a path to enlightenment and salvation. The foundation of Christian theosophy is usually attributed to the German philosopher Jakob Böhme. In 1875, the term "theosophy" was adopted and revived by the Theosophical Society, a largely unrelated esoteric organisation which spawned a religious movement also called Theosophy. In the twentieth century, theosophy became the object of study for various scholars of Western esotericism.
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  • 30 Nov 2022
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First-Price Sealed-Bid Auction
A first-price sealed-bid auction (FPSBA) is a common type of auction. It is also known as blind auction. In this type of auction, all bidders simultaneously submit sealed bids, so that no bidder knows the bid of any other participant. The highest bidder pays the price they submitted.:p2
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  • 01 Dec 2022
Topic Review
Bloch Wave
A Bloch wave (also called Bloch state or Bloch function or Bloch wavefunction), named after Swiss physicist Felix Bloch, is a kind of wave function which can be written as a plane wave modulated by a periodic function. By definition, if a wave is a Bloch wave, its wavefunction can be written in the form: where [math]\displaystyle{ \mathbf{r} }[/math] is position, [math]\displaystyle{ \psi }[/math] is the Bloch wave, [math]\displaystyle{ u }[/math] is a periodic function with the same periodicity as the crystal, the wave vector [math]\displaystyle{ \mathbf{k} }[/math] is the crystal momentum vector, [math]\displaystyle{ \mathrm{e} }[/math] is Euler's number, and [math]\displaystyle{ \mathrm{i} }[/math] is the imaginary unit. Bloch waves are important in solid-state physics, where they are often used to describe an electron in a crystal. This application is motivated by Bloch's theorem, which states that the energy eigenstates for an electron in a crystal can be written as Bloch waves (more precisely, it states that the electron wave functions in a crystal have a basis consisting entirely of Bloch wave energy eigenstates). This fact underlies the concept of electronic band structures. These Bloch wave energy eigenstates are written with subscripts as [math]\displaystyle{ \psi_{n\mathbf{k}} }[/math], where [math]\displaystyle{ n }[/math] is a discrete index, called the band index, which is present because there are many different Bloch waves with the same [math]\displaystyle{ \mathbf{k} }[/math] (each has a different periodic component [math]\displaystyle{ u }[/math]). Within a band (i.e., for fixed [math]\displaystyle{ n }[/math]), [math]\displaystyle{ \psi_{n\mathbf{k}} }[/math] varies continuously with [math]\displaystyle{ \mathbf{k} }[/math], as does its energy. Also, for any reciprocal lattice vector [math]\displaystyle{ \mathbf{K} }[/math], [math]\displaystyle{ \psi_{n\mathbf{k}}=\psi_{n(\mathbf{k+K})} }[/math]. Therefore, all distinct Bloch waves occur for values of [math]\displaystyle{ \mathbf{k} }[/math] which fall within the first Brillouin zone of the reciprocal lattice.
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  • 30 Nov 2022
Topic Review
NASDAQ
The Nasdaq Stock Market (/ˈnæzˌdæk/ (listen), also known simply as Nasdaq) is an American stock exchange. It is the second-largest exchange in the world by market capitalization, behind only the New York Stock Exchange located in the same city. The exchange platform is owned by Nasdaq, Inc., which also owns the Nasdaq Nordic (formerly known as OMX) and Nasdaq Baltic stock market network and several U.S. stock and options exchanges
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  • 30 Nov 2022
Topic Review
2015 Guru Granth Sahib Desecration Controversy
The 2015 Guru Granth Sahib desecration (also known as the 2015 Guru Granth Sahib sacrilege) refers to a series of desecration incidents of the Sikh Guru Guru Granth Sahib and subsequent protests that took place in Punjab, India in October 2015. The first incident of desecration was reported from Bargari, Faridkot district, where 110 torn Angs (literally body part means pages) of the holy Guru were found on 12 October. On the early morning hours of 14 October, two Sikh protesters were shot dead by the police as the peaceful protesters were sitting in demonstration.
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  • 30 Nov 2022
Topic Review
BTSB Anti-D Scandal
In 1994, the Irish Blood Transfusion Service Board (BTSB) informed the Minister for Health that a blood product they had distributed in 1977 for the treatment of pregnant mothers had been contaminated with the Hepatitis C virus. Following a report by an expert group, it was discovered that the BTSB had produced and distributed a second infected batch in 1991. The Government established a Tribunal of Inquiry to establish the facts of the case and also agreed to establish a tribunal for the compensation of victims but seemed to frustrate and delay the applications of these, in some cases terminally, ill women. This controversy also sparked an examination of the BTSB's lax procedures for screening blood products for the treatment of Haemophilia and exposed the infection of many Haemophiliacs with HIV, Hepatitis B and Hepatitis C.
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  • 30 Nov 2022
Topic Review
Office 365
Office 365 is a line of subscription services offered by Microsoft as part of the Microsoft Office product line. The brand encompasses plans that allow use of the Microsoft Office software suite over the life of the subscription, as well as cloud-based software-as-a-service products for business environments, such as hosted Exchange Server, Skype for Business Server, and SharePoint, among others. All Office 365 plans include automatic updates to their respective software at no additional charge, as opposed to conventional licenses for these programs—where new versions require purchase of a new license. After a beta test that began in October 2010, Microsoft launched Office 365 on 28 June 2011, aimed originally at corporate users as a successor to Microsoft Business Productivity Online Suite (BPOS). With the release of Microsoft Office 2013, Microsoft expanded Office 365 to include new plans aimed at different types of businesses, along with new plans aimed at general consumers, including benefits tailored towards Microsoft consumer services such as OneDrive (whose integration with Office was a major feature of the 2013 suite). On 21 April 2020, the consumer and small business plans of Office 365 were renamed Microsoft 365, which emphasizes productivity features and services outside of the core Microsoft Office software suite. All products that were called Office 365 were renamed as Microsoft 365 on the same day. In the fourth quarter of fiscal year 2017, Office 365 revenue exceeded that of conventional license sales of Microsoft Office software for the first time.
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  • 30 Nov 2022
Topic Review
Behavioural Archaeology
Behavioural archaeology is an archaeological theory that expands upon the nature and aims of archaeology in regards to human behaviour and material culture. The theory was first published in 1975 by American archaeologist Michael B. Schiffer and his colleagues J. Jefferson Reid, and William L. Rathje. The theory proposes four strategies that answer questions about past, and present cultural behaviour. It is also a means for archaeologists to observe human behaviour and the archaeological consequences that follow. The theory was developed as a reaction to changes in archaeological thought, and expanding archaeological practise during the mid-late 20th century. It reacted to the increasing number of sub-disciplines emerging within archaeology as each came with their own unique methodologies. The theory was also a reaction to the processual thought process that emerged within the discipline some years prior. In recent years the use of behavioural archaeology has been regarded as a significant contribution to the archaeological community. The strategies outlined by Schiffer and his colleagues have developed into sub-disciplines or methodologies that are used and well-regarded in contemporary archaeological practise. Behavioural archaeology has positive effects on the method in which archaeologists use to reconstruct human behaviour.
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