The term "Present Value Interest Factor of an Annuity", also known by the acronym PVIFA, is used in finance theory to refer to the output of a calculation, used to determine the monthly payment needed to repay a loan.
 The calculation has a number of variable factors, which include the quantity borrowed, the given interest rate, the number of regular intervals at which the loan is to be repaid and the term of the loan.
 For example, if person borrows a lump of money, valued at W, due to be repaid at X intervals per year, at an annual interest rate of Y, for Z years, then the regular payment that will repay this loan can be calculated as follows:
Dragon dance () is a form of traditional dance and performance in Chinese culture.
 Like the lion dance it is most often seen in festive celebrations.
 The dance is performed by a team of dancers who manipulate a long flexible figure of a dragon using poles positioned at regular intervals along the length of the dragon.
 The dance team simulates the imagined movements of this river spirit in a sinuous, undulating manner.
Hydraulic tomography (HT) is a sequential cross-hole hydraulic test followed by inversion of all the data to map the spatial distribution of aquifer hydraulic properties.
 Specifically, HT involves installation of multiple wells in an aquifer, which are partitioned into several intervals along the depth using packers.
 A sequential aquifer test at selected intervals is then conducted.
 During the test, water is injected or withdrawn (i.e., a pressure excitation) at a selected interval in a given well.
 Pressure responses of the subsurface are then monitored at other intervals at this well and other wells.
 This test produces a set of pressure excitation/response data of the subsurface.
 Once a test is completed, the pump is moved to another interval and the test is repeated to collect another set of data.
 The same procedure is then applied to the intervals at other wells.
 Afterward, the data sets from all tests are processed by a mathematical model to estimate the spatial distribution of hydraulic properties of the aquifer.
 These pairs of pumping and drawdown data sets at different locations make an inverse problem better posed since each pair cross-validates the others such that the estimates become less non-unique.
 In other words, predictions of ground water flow based on the HT estimates will be more accurate and less uncertain than those based on estimates from traditional site-characterization approaches and model calibrations.
A tea ceremony is a ritualized form of making tea practiced in Asian culture by the Chinese, Korean, Japanese, Indian, and Vietnamese.
 The tea ceremony, literally translated as ""way of tea"" in Japanese, and ""art of tea"" in Chinese , is a cultural activity involving the ceremonial preparation and presentation of tea.
 The Japanese tea ceremony is better known, and was influenced by the Chinese tea culture during ancient and medieval times, starting in the 9th century when tea was first introduced to Japan from China.
 The Vietnamese tea ceremony, also influenced by its Chinese counterpart, is only performed during weddings and other religious rituals.
 One can also refer to the whole set of rituals, tools, gestures, etc. used in such ceremonies as tea culture.
 All of these tea ceremonies and rituals contain "an adoration of the beautiful among the sordid facts of everyday life", as well as refinement, an inner spiritual content, humility, restraint and simplicity "as all arts that partake the extraordinary, an artistic artificiality, abstractness, symbolism and formalism" to one degree or another.
UEA Broad is an area of open water commonly known as a Broad.
 It gets its name from the university (University of East Anglia) that it neighbours.
 The UEA Broad is one of the few Broads produced by quarrying rather than peat digging.
 The southern side borders a sight of special scientific interest where it meets the Yare.
 The Broad is particularly well known for its bird life with great crested grebes being a common sight; other birds include kingfishers, swans, sedge warblers and cuckoos.
 While in the past the lake was used for windsurfing by students from the university health and safety concerns have put an end to this practice.
 The Broad is well stocked with carp and commonly used for fishing with fishing platforms positioned at regular intervals round the edge.
 The northern side also plays host to three barbeques available for use by students and staff of the university.
 The favoured one lies next to a sandy area of the shoreline often known as “The Beach”, where seagulls and ducks often congregate to be fed.
Ripstop fabrics are woven fabrics, often made of nylon, using a special reinforcing technique that makes them resistant to tearing and ripping.
 During weaving, (thick) reinforcement threads are interwoven at regular intervals in a crosshatch pattern.
 The intervals are typically 5 to 8 millimeters (0.2 to 0.3 in).
 Thin and lightweight ripstop fabrics have a 3-dimensional structure due to the thicker threads being interwoven in thinner cloth.
 Older lightweight ripstop fabrics display the thicker interlocking thread patterns in the material quite prominently, but more modern weaving techniques make the ripstop threads less obvious.
 A similar effect can be achieved by weaving two or three fine yarns together at smaller intervals.
Keykode (also written as either KeyKode or KeyCode) is an Eastman Kodak Company advancement on edge numbers, which are letters, numbers and symbols placed at regular intervals along the edge of 35 mm and 16 mm film to allow for frame-by-frame specific identification.
 It was introduced in 1990.
Community paper is a term used by publishers, advertisers and readers to describe a range of publications that share a common service to their local community and commerce.
 Their predominant medium being newsprint, often free and published at regular weekly or monthly intervals, Community Papers are distinguished by their demonstrable levels of local engagement, rather than by the scope of their content.
 While Merriam-Webster and other dictionaries have yet to define Community Paper, the term has long been incorporated into the actual name of six state, five regional and one national trade association of hometown publishers of passing events, both general and commercial.
 While the diverse composition of their membership may cast a wide tent over the term, all Community Papers have a Nameplate, bear a Masthead, are fixed in print and dated by edition, are published at regular intervals, and are archived internally at a minimum.
 Whether a specific Community Paper might more resemble a Shopper or a Newspaper, all such local papers fit the dictionary definition of Publication and Periodical, and are clearly distinguished from "Flyers", "Handbills" and "Circulars" which are printed, usually at sporadic intervals, and serve a limited, often singular commercial interest.
A windpost is a structural item used in the design and construction of masonry walls to increase lateral wall stability and protect them against damage from horizontal forces imposed by wind pressure, crowd or handrail loads.
 They are normally constructed from mild steel channel sections, supported at the head and the foot between floor slab levels and/or the principal steelwork sections forming the structural frame of the building.
 In cavity walls, the windpost will typically be fixed into the inner and outer leafs of the wall by specialist fixings and fastenings at regular intervals along its length.
 The windposts will be spaced along the walls of the building at regular intervals as calculated by the engineer to suit the required loadings.
Dance in China is a highly varied art form, consisting of many modern and traditional dance genres.
 The dances cover a wide range, from folk dances to performances in opera and ballet, and may be used in public celebrations, rituals and ceremonies.
 There are also 56 officially recognized ethnic groups in China, and each ethnic minority group in China also has its own folk dances.
 The best known Chinese dances today are the Dragon dance and the Lion Dance.

Question:  Of what culture is a dance erformed by a team of dancers who manipulate a long flexible figure of a dragon using poles positioned at regular intervals along the length of the dragon, that is used in public celebrations, rituals and ceremonies?
Answer: Chinese culture