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Block-stacking Problem
In statics, the block-stacking problem (sometimes known as The Leaning Tower of Lire , also the book-stacking problem, or a number of other similar terms) is a puzzle concerning the stacking of blocks at the edge of a table. Statement The block-stacking problem is the following puzzle: Place N identical rigid rectangular blocks in a stable stack on a table edge in such a way as to maximize the overhang. provide a long list of references on this problem going back to mechanics texts from the middle of the 19th century. Variants Single-wide The single-wide problem involves having only one block at any given level. In the ideal case of perfectly rectangular blocks, the solution to the single-wide problem is that the maximum overhang is given by \sum_^\frac times the width of a block. This sum is one half of the corresponding partial sum of the harmonic series. Because the harmonic series diverges, the maximal overhang tends to infinity as N increases, meaning that it is poss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Block Stacking Problem
In statics, the block-stacking problem (sometimes known as The Leaning Tower of Lire , also the book-stacking problem, or a number of other similar terms) is a puzzle concerning the stacking of blocks at the edge of a table. Statement The block-stacking problem is the following puzzle: Place N identical rigid rectangular blocks in a stable stack on a table edge in such a way as to maximize the overhang. provide a long list of references on this problem going back to mechanics texts from the middle of the 19th century. Variants Single-wide The single-wide problem involves having only one block at any given level. In the ideal case of perfectly rectangular blocks, the solution to the single-wide problem is that the maximum overhang is given by \sum_^\frac times the width of a block. This sum is one half of the corresponding partial sum of the harmonic series. Because the harmonic series diverges, the maximal overhang tends to infinity as N increases, meaning that it is poss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: *Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into ''static friction'' ("stiction") between non-moving surfaces, and ''kinetic friction'' between moving surfaces. With the exception of atomic or molecular friction, dry friction generally arises from the interaction of surface features, known as asperities (see Figure 1). *Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other. *Lubricated friction is a case of fluid friction where a lubricant fluid separates two solid surfaces. *Skin friction is a component of drag, the force resisting the motion of a fluid across the surface of a body. *Internal friction is the force resisting motion between the elements making up a so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PBS Digital Studios
PBS Digital Studios is a non-profit organization that through which PBS distributes original educational web video content based in Arlington, Virginia. It comprises both original series and partnerships with existing YouTube channels. Most of the series are about science, popular culture, art, food, news, and music. History PBS Digital Studios was founded by Jason Seiken in June 2012.Looking Back On A Year Of PBS Digital Studios July 18, 2013. They had their first viral hit with a "remix" of d vocals from '' Mr. Rogers' Neigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plywood
Plywood is a material manufactured from thin layers or "plies" of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. It is an engineered wood from the family of manufactured boards which include medium-density fibreboard (MDF), oriented strand board (OSB) and particle board (chipboard). All plywoods bind resin and wood fibre sheets (cellulose cells are long, strong and thin) to form a composite material. This alternation of the grain is called ''cross-graining'' and has several important benefits: it reduces the tendency of wood to split when nailed at the edges; it reduces expansion and shrinkage, providing improved dimensional stability; and it makes the strength of the panel consistent across all directions. There is usually an odd number of plies, so that the sheet is balanced—this reduces warping. Because plywood is bonded with grains running against one another and with an odd number of composite part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adam Savage
Adam Whitney Savage (born July 15, 1967) is an American special effects designer and fabricator, actor, educator, and television personality and producer, best known as the former co-host (with Jamie Hyneman) of the Discovery Channel television series ''MythBusters'' and '' Unchained Reaction''. His model work has appeared in major films, including '' Star Wars: Episode II – Attack of the Clones'' and ''The Matrix Reloaded''. He is the host of the TV program ''Savage Builds'', which premiered on the Science Channel on June 14, 2019. He is most active on the platform Adam Savage's Tested which includes a website and a YouTube channel. Early life Savage was born in New York City and was raised in North Tarrytown, New York, which was renamed Sleepy Hollow in 1996. He graduated from Sleepy Hollow High School in 1985. His maternal grandfather Cushman Haagensen was a surgeon who pioneered breast cancer surgery. His father Whitney Lee Savage (1928–1998) was a painter, filmmaker ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MythBusters
''MythBusters'' is a science entertainment television program, developed by Peter Rees and produced by Australia's Beyond Television Productions. The series premiered on the Discovery Channel on January 23, 2003. It was broadcast internationally by many television networks and other Discovery channels worldwide. The show's original hosts, special effects experts Adam Savage and Jamie Hyneman, used elements of the scientific method to test the validity of rumors, myths, movie scenes, adages, Internet videos, and news stories. The show was one of the most popular on Discovery Channel, being preceded only by ''How It's Made'' and ''Daily Planet'', both in Canada. Filmed in San Francisco and edited in Artarmon, New South Wales, ''MythBusters'' aired 282 total episodes before its cancellation at the end of the 2016 season in March. Planning and some experimentation took place at Hyneman's workshops in San Francisco; experiments requiring more space or special accommodations we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D!NG
Vsauce () is a YouTube brand created by educator Michael Stevens. The channels feature videos on scientific, psychological, mathematical, and philosophical topics, as well as gaming, technology, popular culture, and other general interest subjects. History On April 17, 2010, Michael Stevens launched the main Vsauce channel.Vsauce is 11 years old today!! Apr 16, 2021 According to episode #18 of ''LÜT'' on the original Vsauce channel, the name "Vsauce" was generated using the fake website generator portion of a site called Fake Name Generator."Make Your Cat a DJ – and more! LÜT #18". ''Vsauce. YouTube. ''Retrieved July 24, 2013 After Stevens generated the fake website Vsauce.com, he registered it and began uploading videos. Initially, the channel's programmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vsauce
Vsauce () is a YouTube brand created by educator Michael Stevens. The channels feature videos on scientific, psychological, mathematical, and philosophical topics, as well as gaming, technology, popular culture, and other general interest subjects. History On April 17, 2010, Michael Stevens launched the main Vsauce channel.Vsauce is 11 years old today!! Apr 16, 2021 According to episode #18 of ''LÜT'' on the original Vsauce channel, the name "Vsauce" was generated using the fake website generator portion of a site called Fake Name Generator."Make Your Cat a DJ – and more! LÜT #18". ''Vsauce. YouTube. ''Retrieved July 24, 2013 After Stevens generated the fake website Vsauce.com, he registered it and began uploading videos. Initially, the channel's programmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YouTube
YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the List of most visited websites, second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users who collectively watch more than one billion hours of videos each day. , videos were being uploaded at a rate of more than 500 hours of content per minute. In October 2006, YouTube was bought by Google for $1.65 billion. Google's ownership of YouTube expanded the site's business model, expanding from generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by YouTube. It also offers YouTube Premium, a paid subscription option for watching content without ads. YouTube also approved creators to participate in Google's Google AdSens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Stevens (educator)
Michael David Stevens (born January 23, 1986) is an American educator, public speaker, entertainer, and editor best known for creating and hosting the education YouTube channel ''Vsauce''. His channel initially released video game-related content until the popularity of his educational series ''DOT'' saw discussions of general interest become the focus of ''Vsauce'', encompassing explanations of science, philosophy, culture, and illusion. As the host of ''Vsauce'', Stevens has become one of the most successful YouTubers (with over 18 million subscribers and over 2.4 billion views), as well as a leading figure in the internet-driven popularization of science and education. In 2017, he created and starred in the YouTube Premium series '' Mind Field'', and presented the nationwide educational stage tour ''Brain Candy Live!'' alongside Adam Savage. Early life and education Stevens was born on January 23, 1986, in Kansas City, Missouri. His mother worked as a teaching assistant, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robust
Robustness is the property of being strong and healthy in constitution. When it is transposed into a system, it refers to the ability of tolerating perturbations that might affect the system’s functional body. In the same line ''robustness'' can be defined as "the ability of a system to resist change without adapting its initial stable configuration". "Robustness in the small" refers to situations wherein perturbations are small in magnitude, which considers that the "small" magnitude hypothesis can be difficult to verify because "small" or "large" depends on the specific problem. Conversely, "Robustness in the large problem" refers to situations wherein no assumptions can be made about the magnitude of perturbations, which can either be small or large.C.Alippi: "Robustness Analysis" chapter in ''Intelligence for Embedded Systems.'' Springer, 2014, 283pp, . It has been discussed that robustness has two dimensions: resistance and avoidance.Durach, C.F. et al. (2015)Antecedents a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Statics
Statics is the branch of classical mechanics that is concerned with the analysis of force and torque (also called moment) acting on physical systems that do not experience an acceleration (''a''=0), but rather, are in static equilibrium with their environment. The application of Newton's second law to a system gives: : \textbf F = m \textbf a \, . Where bold font indicates a vector that has magnitude and direction. \textbf F is the total of the forces acting on the system, m is the mass of the system and \textbf a is the acceleration of the system. The summation of forces will give the direction and the magnitude of the acceleration and will be inversely proportional to the mass. The assumption of static equilibrium of \textbf a = 0 leads to: : \textbf F = 0 \, . The summation of forces, one of which might be unknown, allows that unknown to be found. So when in static equilibrium, the acceleration of the system is zero and the system is either at rest, or its center of mas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
