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Rattlesnake round-up | Rattlesnake round-up | Rattlesnake round-ups (or roundups), also known as rattlesnake rodeos, are annual events common in the rural Midwest and Southern United States, where the primary attractions are captured wild rattlesnakes which are sold, displayed, killed for food or animal products (such as snakeskin) or released back into the wild. ... |
Rattlesnake round-up | Rattlesnake round-up | Cash prizes and trophies are often given out to participants in categories like heaviest, longest, or most snakes. These incentives result in all size classes of snakes being targeted equally. Most roundups target the western diamondback rattlesnake (Crotalus atrox), though some events target prairie rattlesnakes (C. v... |
Rattlesnake round-up | Media | In the Simpsons episode "Whacking Day" (Season 04, Episode 20), Lisa and Bart try to save snakes from being killed. |
Elementary amenable group | Elementary amenable group | In mathematics, a group is called elementary amenable if it can be built up from finite groups and abelian groups by a sequence of simple operations that result in amenable groups when applied to amenable groups. Since finite groups and abelian groups are amenable, every elementary amenable group is amenable - however,... |
Elementary amenable group | Elementary amenable group | Formally, the class of elementary amenable groups is the smallest subclass of the class of all groups that satisfies the following conditions: it contains all finite and all abelian groups if G is in the subclass and H is isomorphic to G, then H is in the subclass it is closed under the operations of taking subgroups, ... |
Tele-TASK | Tele-TASK | Tele-TASK is a university research project in the e-learning area. It can be applied to lecture recording, post-processing and distribution. Research topics include e-learning, tele-teaching, semantic web, video analysis, speech recognition, collaborative learning, social networking, web technologies, recommendation sy... |
DNA fragmentation | DNA fragmentation | DNA fragmentation is the separation or breaking of DNA strands into pieces. It can be done intentionally by laboratory personnel or by cells, or can occur spontaneously. Spontaneous or accidental DNA fragmentation is fragmentation that gradually accumulates in a cell. It can be measured by e.g. the Comet assay or by th... |
DNA fragmentation | DNA fragmentation | Its main units of measurement is the DNA Fragmentation Index (DFI). A DFI of 20% or more significantly reduces the success rates after ICSI.DNA fragmentation was first documented by Williamson in 1970 when he observed discrete oligomeric fragments occurring during cell death in primary neonatal liver cultures. He descr... |
DNA fragmentation | Intentional | DNA fragmentation is often necessary prior to library construction or subcloning for DNA sequences. A variety of methods involving the mechanical breakage of DNA have been employed where DNA is fragmented by laboratory personnel. Such methods include sonication, needle shear, nebulisation, point-sink shearing and passa... |
DNA fragmentation | Intentional | Restriction digest is the intentional laboratory breaking of DNA strands. It is an enzyme-based treatment used in biotechnology to cut DNA into smaller strands in order to study fragment length differences among individuals or for gene cloning. This method fragments DNA either by the simultaneous cleavage of both stran... |
DNA fragmentation | Intentional | Acoustic shearing of the transmission of high-frequency acoustic energy waves delivered to a DNA library. The transducer is bowl shaped so that the waves converge at the target of interest. |
DNA fragmentation | Intentional | Nebulization forces DNA through a small hole in a nebulizer unit, which results in the formation of a fine mist that is collected. Fragment size is determined by the pressure of the gas used to push the DNA through the nebulizer, the speed at which the DNA solution passes through the hole, the viscosity of the solution... |
DNA fragmentation | Intentional | Sonication, a type of hydrodynamic shearing, subjects DNA to acoustic cavitation and hydrodynamic shearing by exposure to brief periods of sonication, usually resulting in 700bp fragments. For DNA fragmentation, sonication is commonly applied at burst cycles using a probe-type sonicator.
Point-sink shearing, a type of ... |
DNA fragmentation | Intentional | French pressure cells pass DNA through a narrow valve under high pressure to create high shearing forces. With a French press, the shear force can be carefully modulated by adjusting the piston pressure. The Press provides a single pass through the point of maximum shear force, limiting damage to delicate biological st... |
DNA fragmentation | Intentional | In transposome mediated fragmentation (tagmentation) transposomes are prepared with DNA that is afterwards cut so that the transposition events result in fragmented DNA with adapters (instead of an insertion). The relative concentration of transposomes and DNA must be appropriate. |
DNA fragmentation | Spontaneous | Apoptotic DNA fragmentation is a natural fragmentation that cells perform in apoptosis (programmed cell death). DNA fragmentation is a biochemical hallmark of apoptosis. In dying cells, DNA is cleaved by an endonuclease that fragments the chromatin into nucleosomal units, which are multiples of about 180-bp oligomers a... |
DNA fragmentation | Spontaneous | CAD cleaves the DNA at the internucleosomal linker sites between the nucleosomes, protein-containing structures that occur in chromatin at ~180-bp intervals. This is because the DNA is normally tightly wrapped around histones, the core proteins of the nucleosomes. The linker sites are the only parts of the DNA strand t... |
DNA fragmentation | Uses | DNA Fragmentation plays an important part in forensics, especially that of DNA profiling. |
DNA fragmentation | Uses | Restriction Fragment Length Polymorphism (RFLP) is a technique for analyzing the variable lengths of DNA fragments that result from digesting a DNA sample with a restriction endonuclease. The restriction endonuclease cuts DNA at a specific sequence pattern known as a restriction endonuclease recognition site. The prese... |
DNA fragmentation | Uses | In polymerase chain reaction (PCR) analysis, millions of exact copies of DNA from a biological sample are made. It used to amplify a specific region of a DNA strand (the DNA target). Most PCR methods typically amplify DNA fragments of between 0.1 and 10 kilo base pairs (kb), although some techniques allow amplification... |
DNA fragmentation | Uses | DNA fragmented during apoptosis, of a size from 1 to 20 nucleosomes, can be selectively isolated from the cells fixed in the denaturing fixative ethanol |
Out-of-home entertainment | Out-of-home entertainment | Out-of-home entertainment (OOHE or OHE) is a term coined by the amusement industry to collectively refer to experiences at regional attractions like theme parks and waterparks with their thrill rides and slides, and smaller community-based entertainment venues such as family entertainment and cultural venues. |
Out-of-home entertainment | Out-of-home entertainment | In the US alone, there are nearly 30,000 attractions—theme and amusement parks, attractions, water parks, family entertainment centers, zoos, aquariums, science centers, museums, and resorts, producing a total nationwide economic impact of $219 billion in 2011, according to leading international industry association, I... |
Out-of-home entertainment | Out-of-home entertainment | This term is not to be confused with out-of-home media advertising as used by the advertising industry, although the convergence of digital out-of-home advertising and the digital out-of-home entertainment is producing innovations in retail and hospitality, steeped in fundamentals of social gaming experiences defined b... |
Out-of-home entertainment | Overview | Digital out-of-home entertainment (also DOE) is a sector that is understood by few but is a fast-growing technology sector with plenty of innovations transforming the sector. Its roots lie in the popularity of coin-operated arcade video games such as racing, fighting, Japanese imports, or pinball that Generation X will... |
Out-of-home entertainment | Overview | When Generation Y came along, an audience well-versed in digital gaming favored game consoles over arcade machines. So while video amusement remains an integral part of the popular culture fabric today, its relevancy is diminished and even perceived as 'dead' partly due to the lack of coverage by consumer-game media ev... |
Out-of-home entertainment | Forms of out-of-home entertainment | Moviegoing is one of the most popular and affordable forms of out-of-home entertainment.
Other classic and expanded forms of OOHE making up the DOE sector include: |
Out-of-home entertainment | Key actors in out-of-home entertainment | Family entertainment centers The traditional FECs is a classic form of OOHE that is easily understood by the public. FECs are essentially a converged outgrowth of theme restaurants and the winning formula of combining food and entertainment as a business model has been around for more than 30 years. The first Dave & Bu... |
Out-of-home entertainment | Key actors in out-of-home entertainment | Arcade video game developers Probably known more by the blockbuster arcade video game titles they produced rather than by company names, these video game developers played a defining role in the birth of the video amusement industry. In 1972, Atari essentially created the first commercially successful video game Pong, ... |
Out-of-home entertainment | Key actors in out-of-home entertainment | Video game publishers are also making inroads into the OOHE market by licensing iconic IPs (intellectual property) to experienced arcade game developers and manufacturers, such as the recent collaboration between Ubisoft and LAI Games to produce Virtual Rabbids: The Big Ride, an attendant-free VR attraction based on th... |
Out-of-home entertainment | Key actors in out-of-home entertainment | Redemption game manufacturers A redemption game is an arcade amusement game involving skill that rewards the player (in gifts, tokens, etc.) proportionately to his or her score. One of the most popular redemption games, Skee Ball, has more than 100,000 Skee-Ball branded alley games in use worldwide by some estimates an... |
Out-of-home entertainment | Key actors in out-of-home entertainment | Other notable players include Coast to Coast Entertainment, Apple Industries, Coastal Amusements, Universal Space (UNIS), Adrenaline Amusements. |
Out-of-home entertainment | Key actors in out-of-home entertainment | Simulation video game manufacturers Another category of video amusement games are simulators. Raw Thrills, best known for developing arcade video games based on films such as Jurassic Park Arcade and AMC's The Walking Dead Arcade, is a common name found in medium and larger-sized FECs. Other established companies in th... |
Eureka effect | Eureka effect | The eureka effect (also known as the Aha! moment or eureka moment) refers to the common human experience of suddenly understanding a previously incomprehensible problem or concept. Some research describes the Aha! effect (also known as insight or epiphany) as a memory advantage, but conflicting results exist as to wher... |
Eureka effect | Eureka effect | Insight is a psychological term that attempts to describe the process in problem solving when a previously unsolvable puzzle becomes suddenly clear and obvious. Often this transition from not understanding to spontaneous comprehension is accompanied by an exclamation of joy or satisfaction, an Aha! moment. |
Eureka effect | Eureka effect | A person utilizing insight to solve a problem is able to give accurate, discrete, all-or-nothing type responses, whereas individuals not using the insight process are more likely to produce partial, incomplete responses.A recent theoretical account of the Aha! moment started with four defining attributes of this experi... |
Eureka effect | History and etymology | The effect is named from a story about ancient Greek polymath Archimedes. In the story, Archimedes was asked (c. 250 BC) by the local king to determine whether a crown was pure gold. During a subsequent trip to a public bath, Archimedes noted that water was displaced when his body sank into the bath, and particularly t... |
Eureka effect | Research | Initial research Research on the Aha! moment dates back more than 100 years, to the Gestalt psychologists' first experiments on chimpanzee cognition. In his 1921 book, Wolfgang Köhler described the first instance of insightful thinking in animals: One of his chimpanzees, Sultan, was presented with the task of reaching ... |
Eureka effect | Research | The Eureka effect was later also described by Pamela Auble, Jeffrey Franks and Salvatore Soraci in 1979. The subject would be presented with an initially confusing sentence such as "The haystack was important because the cloth ripped". After a certain period of time of non-comprehension by the reader, the cue word (par... |
Eureka effect | Research | How people solve insight problems Currently there are two theories for how people arrive at the solution for insight problems. The first is the progress monitoring theory. The person will analyze the distance from their current state to the goal state. Once a person realizes that they cannot solve the problem while on ... |
Eureka effect | Research | Memory It had been determined that recall is greater for items that were generated by the subject versus if the subject was presented with the stimuli. There seems to be a memory advantage for instances where people are able to produce an answer themselves, recall was higher when Aha! reactions occurred. They tested se... |
Eureka effect | Research | Cerebral lateralization Functional magnetic resonance imaging and electroencephalogram studies have found that problem solving requiring insight involves increased activity in the right cerebral hemisphere as compared with problem solving not requiring insight. In particular, increased activity was found in the right h... |
Eureka effect | Research | Sleep Some unconscious processing may take place while a person is asleep, and there are several cases of scientific discoveries coming to people in their dreams. Friedrich August Kekulé von Stradonitz claimed that the ring structure of benzene came to him in a dream where a snake was eating its own tail. Studies have ... |
Eureka effect | Research | Other theories Professor Stellan Ohlsson believes that at the beginning of the problem-solving process, some salient features of the problem are incorporated into a mental representation of the problem. In the first step of solving the problem, it is considered in the light of previous experience. Eventually, an impass... |
Eureka effect | Research | General procedure for conducting ERP and EEG studies When studying insight, or the Aha! effect, ERP or EEG general methods are used. Initially a baseline measurement is taken, which generally asks the subject to simply remember an answer to a question. Following this, subjects are asked to focus on the screen while a l... |
Eureka effect | Research | Evidence in EEG studies Resting-state neural activity has a standing influence on cognitive strategies used when solving problems, particularly in the case of deriving solutions by methodical search or by sudden insight. The two cognitive strategies used involve both search and analysis of current state of a problem, t... |
Eureka effect | Research | There were also differences in attention between individuals of HI and LI. It has been suggested that individuals who are highly creative exhibit diffuse attention, thus allowing them a greater range of environmental stimuli. It was found that individuals who displayed HI would have less resting state occipital alpha-b... |
Eureka effect | Research | Evidence in ERP studies Source localization is hard in ERP studies, and it may be difficult to distinguish signals of insight from signals of the existing cognitive skills it builds on or the unwarranted mental fixation it breaks, but the following conclusions have been offered. |
Eureka effect | Research | One study found that "Aha" answers produced more negative ERP results, N380 in the ACC, than the "No-Aha" answers, 250–500 ms, after an answer was produced. The authors suspected that this N380 in the ACC is a sign of breaking the mental set, and reflects the Aha! effect. Another study was done showed that an Aha! effe... |
Eureka effect | Research | A fourth ERP study is fairly similar, but this study claims to have anterior cingulate cortex activation at N380, which may be responsible for the mediation of breaking the mental set. Other areas of interest were prefrontal cortex (PFC), the posterior parietal cortex, and the medial temporal lobe. If subjects failed t... |
Eureka effect | Research | Evidence in fMRI studies A study with the goal of recording the activity that occurs in the brain during an Aha! moment using fMRIs was conducted in 2003 by Jing Luo and Kazuhisa Niki. Participants in this study were presented with a series of Japanese riddles, and asked to rate their impressions toward each question u... |
Eureka effect | Research | This scale allowed the researchers to only look at participants who would experience an Aha! moment upon viewing the answer to the riddle. In previous studies on insight, researchers have found that participants reported feelings of insight when they viewed the answer to an unsolved riddle or problem.
Luo and Niki had ... |
Eureka effect | Research | An example of a Japanese riddle used in the study: The thing that can move heavy logs, but cannot move a small nail → A river.Participants were given 3 minutes to respond to each riddle, before the answer to the riddle was revealed. If the participant experienced an Aha! moment upon viewing the correct answer, any brai... |
Eureka effect | Research | The fMRI results for this study showed that when participants were given the answer to an unsolved riddle, the activity in their right hippocampus increased significantly during these Aha! moments. This increased activity in the right hippocampus may be attributed to the formation of new associations between old nodes.... |
Eureka effect | Research | Although various studies using EEGs, ERPs, and fMRI's report activation in a variety of areas in the brain during Aha! moments, this activity occurs predominantly in the right hemisphere. More details on the neural basis of insight see a recent review named "New advances in the neural correlates of insight: A decade in... |
Eureka effect | Insight problems and problems with insight | Insight problems The Nine Dot Problem The Nine Dot Problem is a classic spatial problem used by psychologists to study insight. |
Eureka effect | Insight problems and problems with insight | The problem consists of a 3 × 3 square created by 9 black dots. The task is to connect all 9 dots using exactly 4 straight lines, without retracing or removing one's pen from the paper. Kershaw & Ohlsson report that in a laboratory setting with a time limit of 2 or 3 minutes, the expected solution rate is 0%. |
Eureka effect | Insight problems and problems with insight | The difficulty with the Nine Dot Problem is that it requires respondents to look beyond the conventional figure-ground relationships that create subtle, illusory spatial constraints and (literally) "think outside of the box". Breaking the spatial constraints shows a shift in attention in working memory and utilizing ne... |
Eureka effect | Insight problems and problems with insight | Example: "A man was washing windows on a high-rise building when he fell from the 40-foot ladder to the concrete path below. Amazingly, he was unhurt. Why? [Answer] He slipped from the bottom rung!" Matchstick arithmetic A subset of matchstick puzzles, matchstick arithmetic, which was developed and used by G. Knoblich,... |
Eureka effect | Insight problems and problems with insight | Anagrams Anagrams involve manipulating the order of a given set of letters in order to create one or many words. The original set of letters may be a word itself, or simply a jumble.
Example: Santa can be transformed to spell Satan.
Rebus puzzles Rebus puzzles, also called "wordies", involve verbal and visual cues that... |
Eureka effect | Insight problems and problems with insight | The test consists of presenting participants with a set of words, such as lick, mine, and shaker. The task is to identify the word that connects these three seemingly unrelated ones. In this example, the answer is salt. The link between words is associative, and does not follow rules of logic, concept formation or prob... |
Eureka effect | Insight problems and problems with insight | Performance on the RAT is known to correlate with performance on other standard insight problems. |
Eureka effect | Insight problems and problems with insight | The Eight Coin Problem In this problem a set of 8 coins is arranged on a table in a certain configuration, and the subject is told to move 2 coins so that all coins touch exactly three others. The difficulty in this problem comes from thinking of the problem in a purely 2-dimensional way, when a 3-dimensional approach ... |
Eureka effect | Insight problems and problems with insight | Problems with insight Insight research is problematic because of the ambiguity and lack of agreement among psychologists of its definition. This could largely be explained by the phenomenological nature of insight, and the difficulty in catalyzing its occurrence, as well as the ways in which it is experimentally "trigg... |
Eureka effect | Insight problems and problems with insight | Furthermore, there are issues related to the taxonomy of insight problems. Puzzles and problems that are utilized in experiments to elicit insight may be classified in two ways. "Pure" insight problems are those that necessitate the use of insight, whereas "hybrid" insight problems are those that can be solved by other... |
Eureka effect | The Aha! effect and scientific discovery | There are several examples of scientific discoveries being made after a sudden flash of insight. One of the key insights in developing his special theory of relativity came to Albert Einstein while talking to his friend Michele Besso: I started the conversation with him in the following way: "Recently I have been worki... |
Steroid acne | Steroid acne | Steroid acne is an adverse reaction to corticosteroids, and presents as small, firm follicular papules on the forehead, cheeks, and chest.: 137 Steroid acne presents with monomorphous pink paupules, as well as comedones, which may be indistinguishable from those of acne vulgaris. Steroid acne is commonly associated wi... |
Fluid warmer | Fluid warmer | A fluid warmer is a medical device used in healthcare facilities for warming fluids, crystalloid, colloid, or blood products, before being administered (intravenously or by other parenteral routes) to body temperature levels to prevent hypothermia in physically traumatized or surgical patients. Infusion fluid warmers a... |
Bilinear interpolation | Bilinear interpolation | In mathematics, bilinear interpolation is a method for interpolating functions of two variables (e.g., x and y) using repeated linear interpolation. It is usually applied to functions sampled on a 2D rectilinear grid, though it can be generalized to functions defined on the vertices of (a mesh of) arbitrary convex quad... |
Bilinear interpolation | Computation | Suppose that we want to find the value of the unknown function f at the point (x, y). It is assumed that we know the value of f at the four points Q11 = (x1, y1), Q12 = (x1, y2), Q21 = (x2, y1), and Q22 = (x2, y2).
Repeated linear interpolation We first do linear interpolation in the x-direction. This yields 11 21 12 2... |
Bilinear interpolation | Computation | Weighted mean The solution can also be written as a weighted mean of the f(Q): 11 11 12 12 21 21 22 22 ), where the weights sum to 1 and satisfy the transposed linear system 11 12 21 22 ]=[1xyxy], yielding the result 11 21 12 22 ]=1(x2−x1)(y2−y1)[x2y2−y2−x21−x2y1y1x2−1−x1y2y2x1−1x1y1−y1−x11][1xyxy], which simplifies to... |
Bilinear interpolation | Computation | Alternative matrix form Combining the above, we have 11 12 21 22 )][x2y2−y2−x21−x2y1y1x2−1−x1y2y2x1−1x1y1−y1−x11][1xyxy].
On the unit square If we choose a coordinate system in which the four points where f is known are (0, 0), (0, 1), (1, 0), and (1, 1), then the interpolation formula simplifies to f(x,y)≈f(0,0)(1−x)... |
Bilinear interpolation | Properties | As the name suggests, the bilinear interpolant is not linear; but it is linear (i.e. affine) along lines parallel to either the x or the y direction, equivalently if x or y is held constant. Along any other straight line, the interpolant is quadratic. Even though the interpolation is not linear in the position (x and y... |
Bilinear interpolation | Properties | The result of bilinear interpolation is independent of which axis is interpolated first and which second. If we had first performed the linear interpolation in the y direction and then in the x direction, the resulting approximation would be the same.
The interpolant is a bilinear polynomial, which is also a harmonic f... |
Bilinear interpolation | Inverse and generalization | In general, the interpolant will assume any value (in the convex hull of the vertex values) at an infinite number of points (forming branches of hyperbolas), so the interpolation is not invertible. |
Bilinear interpolation | Inverse and generalization | However, when bilinear interpolation is applied to two functions simultaneously, such as when interpolating a vector field, then the interpolation is invertible (under certain conditions). In particular, this inverse can be used to find the "unit square coordinates" of a point inside any convex quadrilateral (by consid... |
Bilinear interpolation | Inverse and generalization | Alternatively, a projective mapping between a quadrilateral and the unit square may be used, but the resulting interpolant will not be bilinear.
In the special case when the quadrilateral is a parallelogram, a linear mapping to the unit square exists and the generalization follows easily.
The obvious extension of bilin... |
Bilinear interpolation | Application in image processing | In computer vision and image processing, bilinear interpolation is used to resample images and textures. An algorithm is used to map a screen pixel location to a corresponding point on the texture map. A weighted average of the attributes (color, transparency, etc.) of the four surrounding texels is computed and applie... |
Bilinear interpolation | Application in image processing | Bilinear interpolation can be used where perfect image transformation with pixel matching is impossible, so that one can calculate and assign appropriate intensity values to pixels. Unlike other interpolation techniques such as nearest-neighbor interpolation and bicubic interpolation, bilinear interpolation uses values... |
Bilinear interpolation | Application in image processing | Bilinear interpolation considers the closest 2 × 2 neighborhood of known pixel values surrounding the unknown pixel's computed location. It then takes a weighted average of these 4 pixels to arrive at its final, interpolated value. |
Bilinear interpolation | Application in image processing | Example As seen in the example on the right, the intensity value at the pixel computed to be at row 20.2, column 14.5 can be calculated by first linearly interpolating between the values at column 14 and 15 on each rows 20 and 21, giving 20 14.5 15 14.5 15 14 91 14.5 14 15 14 210 150.5 21 14.5 15 14.5 15 14 162 14.5 14... |
Bilinear interpolation | Application in image processing | This algorithm reduces some of the visual distortion caused by resizing an image to a non-integral zoom factor, as opposed to nearest-neighbor interpolation, which will make some pixels appear larger than others in the resized image. |
Simulation Interoperability Standards Organization | Simulation Interoperability Standards Organization | The Simulation Interoperability Standards Organization (SISO) is an organization dedicated to the promotion of modeling and simulation interoperability and reuse for the benefit of diverse modeling and simulation communities, including developers, procurers, and users, worldwide. |
Simulation Interoperability Standards Organization | History | The Simulation Interoperability Standards Organization (SISO) originated with a small conference held April 26 and 27, 1989, called, "Interactive Networked Simulation for Training". The original conference attracted approximately 60 people. The group was concerned that there was activity occurring in networked simulati... |
Simulation Interoperability Standards Organization | History | The group also believed that once the technology begins to stabilize then there would also be a need for standardization. The technology and the consensus of the community would be captured in the standards as networking or simulation technology matured. The pre-history of SISO starts with SIMNET, a DARPA program from ... |
Simulation Interoperability Standards Organization | History | The "First Conference on Standards for the Interoperability of Defense Simulations" was held on 22–23 August 1989 in Orlando, Florida. DIS Workshops were held semi-annually from 1989 through 1996. The first Simulation Interoperability Workshop (SIW) held under the SISO banner was the 1997 Spring SIW in Orlando. SIWs ha... |
Simulation Interoperability Standards Organization | Contributions | SISO originated, maintained, or contributed standards: IEEE 1278 Distributed Interactive Simulation (DIS) IEEE 1516 High Level Architecture (HLA) for Modeling and Simulation IEEE 1730 DSEEP Distributed Simulation Engineering and Execution Process ISO/IEC 18023-1, SEDRIS—Part 1: Functional specification ISO/IEC 18023-2,... |
PrintMaster | PrintMaster | PrintMaster is a greeting card and banner creation program for Commodore 64, Amiga, Apple II and IBM PC computers. PrintMaster sold more than two million copies. |
PrintMaster | History | In 1986, the first version of PrintMaster was the target of a lawsuit by Broderbund, who alleged that PrintMaster was a direct copy of their popular The Print Shop program. The court found in favor of Broderbund, locating specific instances of copying. The program was re-worked to provide the same functionality, but th... |
PrintMaster | History | Since the early 1990s, the name has been used for a basic desktop publishing software package, under the Broderbund brand. It was unique in that it provided libraries of clip-art and templates through a simple interface to build signs, greeting cards, posters and banners with household dot-matrix printers. Over the yea... |
PrintMaster | History | PrintMaster 2.0 is the first consumer desktop publishing solution at retail to offer Macintosh and Windows compatibility and integrated professional printing.
In September 2010, PrintMaster 2011 was released. Versions include Platinum, Gold, and Express for digital download.
PrintMaster project types include banners, c... |
Non-squeezing theorem | Non-squeezing theorem | The non-squeezing theorem, also called Gromov's non-squeezing theorem, is one of the most important theorems in symplectic geometry. It was first proven in 1985 by Mikhail Gromov. The theorem states that one cannot embed a ball into a cylinder via a symplectic map unless the radius of the ball is less than or equal to... |
Non-squeezing theorem | Non-squeezing theorem | One easy consequence of a transformation being symplectic is that it preserves volume. One can easily embed a ball of any radius into a cylinder of any other radius by a volume-preserving transformation: just picture squeezing the ball into the cylinder (hence, the name non-squeezing theorem). Thus, the non-squeezing t... |
Non-squeezing theorem | Background and statement | We start by considering the symplectic spaces R2n={z=(x1,…,xn,y1,…,yn)}, the ball of radius R: B(R)={z∈R2n:‖z‖<R}, and the cylinder of radius r: Z(r)={z∈R2n:x12+y12<r2}, each endowed with the symplectic form ω=dx1∧dy1+⋯+dxn∧dyn.
Note: The choice of axes for the cylinder are not arbitrary given the fixed symplectic fo... |
Non-squeezing theorem | The “symplectic camel” | Gromov's non-squeezing theorem has also become known as the principle of the symplectic camel since Ian Stewart referred to it by alluding to the parable of the camel and the eye of a needle. As Maurice A. de Gosson states: Now, why do we refer to a symplectic camel in the title of this paper? This is because one can r... |
Non-squeezing theorem | The “symplectic camel” | Similarly: Intuitively, a volume in phase space cannot be stretched with respect to one particular symplectic plane more than its “symplectic width” allows. In other words, it is impossible to squeeze a symplectic camel into the eye of a needle, if the needle is small enough. This is a very powerful result, which is in... |
Non-squeezing theorem | The “symplectic camel” | De Gosson has shown that the non-squeezing theorem is closely linked to the Robertson–Schrödinger–Heisenberg inequality, a generalization of the Heisenberg uncertainty relation. The Robertson–Schrödinger–Heisenberg inequality states that: var(Q)var(P)≥cov2(Q,P)+(ℏ2)2 with Q and P the canonical coordinates and var and c... |
Exogenesis: Perils of Rebirth | Exogenesis: Perils of Rebirth | Exogenesis: Perils of Rebirth is a science fiction adventure game/visual novel developed by Kwan for Microsoft Windows, OS X, and Linux. |
Exogenesis: Perils of Rebirth | Gameplay | The game alternates between point-and-click adventure sections in first person, in which the player explores the environment and solves puzzles, and visual novel sections in which the game's plot is told and the player influences the outcome of dialogs with other characters. Kwan says they were inspired by Shu Takumi's... |
Exogenesis: Perils of Rebirth | Plot | The game begins during a treasure hunt in 2069 in a post-apocalyptic Japan, where the treasure hunter group Durchhalten accidentally activates a trap, resulting in one of the members, Miho Sayashi, getting impaled by spears and dying. The treasure hunt is canceled, and the group ends up splitting up.
Two years later, M... |
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