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Narrowboat
A narrowboat is a particular type of canal boat, built to fit the narrow locks of the United Kingdom. The UK's canal system provided a nationwide transport network during the Industrial Revolution, but with the advent of the railways, commercial canal traffic gradually diminished and the last regular long-distance transportation of goods had virtually disappeared by 1970. However, some commercial traffic continued. From the 1970s onward narrowboats were gradually being converted into permanent residences or as holiday lettings. Today, approximately 6000 narrowboats are registered as 'permanent homes' on Britain's waterway system[citation needed] and represent a growing alternative community living on semi-permanent moorings or continuously cruising. For any boat to enter a narrow lock, it must be under 7 feet (2.13 m) wide, so most narrowboats are nominally 6 feet 10 inches (2.08 m) wide. A narrowboat's maximum length is generally 72 feet (21.95 m), as anything longer will be unable to navigate much of the British canal network, because the nominal maximum length of locks is 75 feet (22.86 m). Some locks are shorter than 72 feet (21.95 m), so to access the entire canal network the maximum length is 57 feet (17.37 m) The first narrow boats played a key role in the economic changes of the British Industrial Revolution. They were wooden boats drawn by a horse walking on the canal towpath led by a crew member. Horses were gradually replaced by steam and then diesel engines. By the end of the 19th century it was common practice to paint roses and castles on narrowboats and their fixtures and fittings. This tradition has continued into the 21st century, but not all narrowboats have such decorations. Modern narrowboats are used for holidays, weekend breaks, touring, or as permanent or part-time residences. Usually, they have steel hulls and a steel superstructure. The hull's flat base is usually 10mm thick, the hull sides 6mm or 8mm, the cabin sides 6mm, and the roof 4mm or 6mm. The numbers of boats have been rising, with the number of licensed boats (not all of them narrowboats) on canals and rivers managed by the Canal & River Trust (CRT) estimated at about 27,000 in 2006 by 2019 this had risen to 34,367. Although a small number of steel narrowboats dispense with the need for a rear steering deck entirely, by imitating some river cruisers in providing wheel steering from a central cockpit, most narrowboats' steering is by a tiller on the stern. There are three major configurations for the stern: traditional stern, cruiser stern and semi-traditional stern. Narrowboats are "Category D" boats which are intended only for navigating rivers, canals and small lakes; but some intrepid boaters have crossed the English Channel in a narrowboat.
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  • 24 Nov 2022
Topic Review
Convolutional Sparse Coding
The convolutional sparse coding paradigm is an extension of the global Sparse Coding model, in which a redundant dictionary is modeled as a concatenation of circulant matrices. While the global sparsity constraint describes signal [math]\displaystyle{ \mathbf{x}\in \mathbb{R}^{N} }[/math] as a linear combination of a few atoms in the redundant dictionary [math]\displaystyle{ \mathbf{D}\in\mathbb{R}^{N\times M}, M\gg N }[/math], usually expressed as [math]\displaystyle{ \mathbf{x}=\mathbf{D}\mathbf{\Gamma} }[/math] for a sparse vector [math]\displaystyle{ \mathbf{\Gamma}\in \mathbb{R}^{M} }[/math], the alternative dictionary structure adopted by the Convolutional Sparse Coding model allows the sparsity prior to be applied locally instead of globally: independent patches of [math]\displaystyle{ \mathbf{x} }[/math] are generated by "local" dictionaries operating over stripes of [math]\displaystyle{ \mathbf{\Gamma} }[/math]. The local sparsity constraint allows stronger uniqueness and stability conditions than the global sparsity prior, and has shown to be a versatile tool for inverse problems in fields such as Image Understanding and Computer Vision. Also, a recently proposed multi-layer extension of the model has shown conceptual benefits for more complex signal decompositions, as well as a tight connection the Convolutional Neural Networks model, allowing a deeper understanding of how the latter operates.
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  • 24 Nov 2022
Topic Review
Archives of Traditional Music
The Indiana University Archives of Traditional Music holds over 100,000 individual audio and video recordings across over 3500 collections of field, broadcast, and commercial recordings. Its holdings are primarily focused on audiovisual recordings relating to research in the academic disciplines of ethnomusicology, folklore, anthropology, linguistics, and various area studies.
  • 858
  • 28 Nov 2022
Topic Review
R20 Regions of Climate Action
The R20 - Regions of Climate Action is a non-profit environmental organization founded in September 2011, by former Governor of California , Arnold Schwarzenegger, with the support of the United Nations . R20 is a coalition of sub-national governments, private companies, international organizations, NGOs, and academic & financial institutions. Its mission is to accelerate sub-national infrastructure investments in the green economy to meaningfully contribute to the Sustainable Development Goals (SDGs). The NGO operates at the sub-national level as R20 believes sub-national governments constitute a powerful force for change and are best positioned to take action & implement green projects. R20's efforts are designed to support sub-national governments around the world to develop and finance low-carbon and climate resilient infrastructure projects in the field of renewable energy, energy efficient lighting and waste optimisation.
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  • 24 Nov 2022
Topic Review
Pulmonary Artery Catheter
Pulmonary artery catheterization (PAC), or right heart catheterization, is the insertion of a catheter into a pulmonary artery. Its purpose is diagnostic; it is used to detect heart failure or sepsis, monitor therapy, and evaluate the effects of drugs. The pulmonary artery catheter allows direct, simultaneous measurement of pressures in the right atrium, right ventricle, pulmonary artery, and the filling pressure ("wedge" pressure) of the left atrium. The pulmonary artery catheter is frequently referred to as a Swan-Ganz catheter, in honor of its inventors Jeremy Swan and William Ganz, from Cedars-Sinai Medical Center.
  • 4.6K
  • 24 Nov 2022
Topic Review
Adder (Electronics)
An adder, or summer, is a digital circuit that performs addition of numbers. In many computers and other kinds of processors adders are used in the arithmetic logic units (ALUs). They are also used in other parts of the processor, where they are used to calculate addresses, table indices, increment and decrement operators and similar operations. Although adders can be constructed for many number representations, such as binary-coded decimal or excess-3, the most common adders operate on binary numbers. In cases where two's complement or ones' complement is being used to represent negative numbers, it is trivial to modify an adder into an adder–subtractor. Other signed number representations require more logic around the basic adder.
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  • 24 Nov 2022
Topic Review
Accelerated Experiential Dynamic Psychotherapy
Accelerated experiential dynamic psychotherapy (AEDP) is a mind-body psychotherapy that is informed by research in the areas of attachment theory, emotion theory, and neuroscience of change. This model of psychotherapy incorporates techniques from experiential therapies (such as Gestalt therapy and person-centered therapy) and ISTDP. AEDP was initially developed as a psychotherapy to treat the effects of childhood attachment trauma and abuse. It is recognized as an effective treatment for complex post-traumatic stress disorder, and attachment disturbances in adults. It is further applied to the treatment of eating disorders, to the treatment considerations when working with diverse populations, to couples therapy, and to the treatment of dissociative disorders. AEDP is applied to the practice of psychotherapy supervision and to short-term psychotherapy.
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  • 24 Nov 2022
Topic Review
BatteryMAX (Idle Detection)
BatteryMAX is an idle detection system used for computer power management under operating system control developed at Digital Research, Inc.'s European Development Centre (EDC) in Hungerford, UK. It was created to address the new genre of portable personal computers (laptops) which ran from battery power. As such, it was also an integral part of Novell's PalmDOS 1.0 operating system tailored for early palmtops in 1992.
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  • 24 Nov 2022
Topic Review
Parasocial Relationships
A parasocial relationship (PSR) is a one-sided relationship that media users form as a result of exposure to media personas. In 1956, the term parasocial relationship was coined by Donald Horton and R. Richard Wohl. They focused on the psychological attachment that was formed from viewing television personalities. Their work laid the foundation and popularized a wide range of research on parasocial phenomena. A parasocial interaction, an exposure that garners interest in a persona, becomes a parasocial relationship after repeated exposure to the media persona causes the media users to develop illusions of intimacy, friendship, and identification. Positive information learned about the media persona results in increased attraction and the relationship progresses. Parasocial relationships are enhanced due to trust and self-disclosure provided by the media persona. Media users are loyal and feel directly connected to the persona much like their close friends by observing and interpreting their appearance, gestures, voice, conversation, and conduct. Media personas have a significant amount of influence over media users, positive or negative, informing the way that they perceive certain topics or even their purchasing habits. Social media introduces additional opportunities for parasocial relationships to intensify because it provides more opportunities for intimate, reciprocal, and frequent interactions between the user and persona.
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  • 24 Nov 2022
Topic Review
List of Unnumbered Minor Planets: 2003 U–Y
This is a partial list of unnumbered minor planets for principal designations assigned between 16 October 2003 and 31 December 2003 (U–Y).
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