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.

Expand All
Entries
Topic Review
Music Psychology
Music psychology, or the psychology of music, may be regarded as a branch of both psychology and musicology. It aims to explain and understand musical behaviour and experience, including the processes through which music is perceived, created, responded to, and incorporated into everyday life. Modern music psychology is primarily empirical; its knowledge tends to advance on the basis of interpretations of data collected by systematic observation of and interaction with human participants. Music psychology is a field of research with practical relevance for many areas, including music performance, composition, education, criticism, and therapy, as well as investigations of human attitude, skill, performance, intelligence, creativity, and social behavior. Music psychology can shed light on non-psychological aspects of musicology and musical practice. For example, it contributes to music theory through investigations of the perception and computational modelling of musical structures such as melody, harmony, tonality, rhythm, meter, and form. Research in music history can benefit from systematic study of the history of musical syntax, or from psychological analyses of composers and compositions in relation to perceptual, affective, and social responses to their music.
  • 6.4K
  • 03 Nov 2022
Topic Review
First Assistant Engineer
A first assistant engineer (also called the second engineer in some countries) is a licensed member of the engineering department on a merchant vessel. This title is used for the person on a ship responsible for supervising the daily maintenance and operation of the engine department. They report directly to the chief engineer. On a merchant vessel, depending on term usage, "the First" or "the Second" is the marine engineer second in command of the engine department after the ship's chief engineer. Due to the supervisory role this engineer plays, in addition to being responsible for the refrigeration systems, main engines (steam/gas turbine, diesel), and any other equipment not assigned to the Second assistant engineer/third engineer or the Third assistant engineer/fourth engineer(s), he is typically the busiest engineer aboard the ship. If the engine room requires 24/7 attendance and other junior engineers can cover the three watch rotations, the first is usually a "day worker" from 0800-1700, with overtime hours varying according to ship/company. The first assistant/second engineer is usually in charge of preparing the engine room for arrival, departure, or standby and oversees major overhauls on critical equipment.
  • 3.0K
  • 03 Nov 2022
Topic Review
Mode-locking
Mode-locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s). A laser operated in this way is sometimes referred to as a femtosecond laser, for example in modern refractive surgery. The basis of the technique is to induce a fixed-phase relationship between the longitudinal modes of the laser's resonant cavity. Constructive interference between these modes can cause the laser light to be produced as a train of pulses. The laser is then said to be 'phase-locked' or 'mode-locked'.
  • 3.9K
  • 03 Nov 2022
Topic Review
Surface Acoustic Wave
A surface acoustic wave (SAW) is an acoustic wave traveling along the surface of a material exhibiting elasticity, with an amplitude that typically decays exponentially with depth into the material. Materials with relatively high magnitude of Young's modulus (e.g., buildings) can be destructed once exposed to strong SAWs (as in earthquakes), whereas, those with relatively low Young's modulus (e.g., bubbles,and biological cells) can start to oscillate when driven by weak SAWs.
  • 1.8K
  • 03 Nov 2022
Topic Review
Channel 101
Channel 101 is a non-profit monthly short film festival in Los Angeles , which also has a sister festival in New York City , Channel 101 NY. Channel 101 is a creation of Dan Harmon and Rob Schrab in which participants submit a short film in the format of a pilot under five minutes in length. The event is structured such that a panel of previously successful submitters choose what pilots are shown, and a live audience at The Downtown Independent decides which pilots continue as a series for the next screening in much the same way TV programs are rated and managed. According to the Channel 101 website, "Channel 101 is a chance to sit in the worn-out chair of the fat network exec, drunk on the blood of lowly artists whose right to exist is given in exchange for their ability to nourish...You run the network. You pick the programming."
  • 888
  • 03 Nov 2022
Topic Review
ATtiny Microcontroller Comparison Chart
ATtiny (also known as TinyAVR) are a subfamily of the popular 8-bit AVR microcontrollers, which typically has fewer features, fewer I/O pins, and less memory than other AVR series chips. The first members of this family were released in 1999 by Atmel (later acquired by Microchip Technology in 2016).
  • 5.8K
  • 03 Nov 2022
Topic Review
Discrete Global Grid
A Discrete Global Grid (DGG) is a mosaic which covers the entire Earth's surface. Mathematically it is a space partitioning: it consists of a set of non-empty regions that form a partition of the Earth’s surface. In a usual grid-modeling strategy, to simplify position calculations, each region is represented by a point, abstracting the grid as a set of region-points. Each region or region-point in the grid is called a cell. When each cell of a grid is subject to a recursive partition, resulting in a "series of discrete global grids with progressively finer resolution", forming a hierarchical grid, it is named Hierarchical DGG (sometimes "DGG system"). Discrete Global Grids are used as the geometric basis for the building of geospatial data structures. Each cell is related with data objects or values, or (in the hierarchical case) may be associated with other cells. DGGs have been proposed for use in a wide range of geospatial applications, including vector and raster location representation, data fusion, and spatial databases. The most usual grids are for horizontal position representation, using a standard datum, like WGS84. In this context is commom also to use a specific DGG as foundation for geocoding standardization. In the context of a spatial index, a DGG can assign unique identifiers to each grid cell, using it for spatial indexing purposes, in geodatabases or for geocoding.
  • 1.3K
  • 03 Nov 2022
Topic Review
Itza’ Language
Itza' (also known as Itza or Itzaj) is a critically endangered Mayan language spoken by the Itza people near Lake Peten Itza in north-central Guatemala. The language has only 25 fluent speakers and 60 nonfluent speakers. Itza' was the language of administration across much of the Yucatán Peninsula prior to 1697, when the Itza people controlled the last significant Mayan nation in Mesoamerica. During this time, the Itza people resettled their ancestral home in the Petén Basin. The subjugation of the Itza capital by the Spanish forced the Itza people to flee or live amongst the Spaniards, such as in San Jose, Guatemala, where the only modern speakers of the language live. The modern Itza people are the last of the Lowland Maya to be able to directly trace their heritage back to the pre-Columbian era. The Itza' language reflects this history in its nomenclature for the natural world: Itza' words referring to agriculture and agricultural practices remain unchanged since first being recorded. Additionally, Itza' possesses a rich vocabulary for crops and animals that encodes specific information about different varietals and individuals of the species.
  • 1.5K
  • 03 Nov 2022
Topic Review
Omnibussimulator
OMSI - The Bus Simulator is a bus driving simulation for Windows that was released in February 2011 as Digital Distribution and in March 2011 on DVD-ROM by Aerosoft. It was developed between 2007 and 2011 by Marcel Kuhnt and Rüdiger Hülsmann under the company name MR Software. The simulation takes place in 1989;-OMSI- it simulates the then-current state of BVG route 92 in Berlin-Spandau. For this purpose, the track was rebuilt faithfully resembling the original and integrated into the game.
  • 1.7K
  • 03 Nov 2022
Topic Review
TERF2
Telomeric repeat-binding factor 2 is a protein that is present at telomeres throughout the cell cycle. It is also known as TERF2, TRF2, and TRBF2, and is encoded in humans by the TERF2 gene. It is a component of the shelterin nucleoprotein complex and a second negative regulator of telomere length, playing a key role in the protective activity of telomeres. It was first reported in 1997 in the lab of Titia de Lange, where a DNA sequence similar, but not identical, to TERF1 was discovered, with respect to the Myb-domain. De Lange isolated the new Myb-containing protein sequence and called it TERF2.
  • 1.4K
  • 03 Nov 2022
  • Page
  • of
  • 863

Other Entry Collections

>>