Half-open Builders

	Half-open Builders Half-open may refer to: * Half-open file in chess * Half-open vowel, a class of vowel sound Computing and mathematics * Half-open interval, an interval containing only one of its endpoints * Half-open line segment, a line segment containing only one of its endpoints * TCP half-open, a TCP connection out of synchronization See also * Half-closed * Clopen In topology, a clopen set (a portmanteau of closed-open set) in a topological space is a set which is both open and closed. That this is possible may seem counterintuitive, as the common meanings of and are antonyms, but their mathematical def ... {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Half-open File In chess, a half-open file (or semi-open file) is a with pawns of only one color. The half-open file can provide a line of attack for a player's rook or queen. A half-open file is generally exploited by the player with no pawns on it. Many openings, such as the Sicilian Defense, aim to complicate the position. In the main line Sicilian, 1.e4 c5 2.Nf3 d6 (or 2...e6, or 2...Nc6) 3.d4 cxd4 4.Nxd4, White obtains a half-open d-file, but Black can pressure White along the half-open c-file. In positions where White has no pawns on a file but Black has one pawn or more on that file, the position is considered to be half-opened for White. In cases where Black has no pawns on a file but White has one or more pawns on that file, the position is considered to be half-opened for Black. A ''pawn break'' occurs when a pawn captures or advances in a way that opens or half-opens one or more files. The demolition of the pawn structure is a common theme in positions with half-open files, si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Half-open Vowel An open-mid vowel (also mid-open vowel, low-mid vowel, mid-low vowel or half-open vowel) is any in a class of vowel sound used in some spoken languages. The defining characteristic of an open-mid vowel is that the tongue is positioned approximately one third of the way from an open vowel to a close vowel. Examples Some of the open-mid vowels that have dedicated symbols in the International Phonetic Alphabet are: * open-mid front unrounded vowel * open-mid front rounded vowel * open-mid central unrounded vowel (older publications may use ) * open-mid central rounded vowel (older publications may use ) * open-mid back unrounded vowel * open-mid back rounded vowel Other open-mid vowels can be indicated with diacritics of relative articulation In phonetics and phonology, relative articulation is description of the manner and place of articulation of a speech sound relative to some reference point. Typically, the comparison is made with a default, unmarked articulation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Half-open Interval In mathematics, a real interval is the set of all real numbers lying between two fixed endpoints with no "gaps". Each endpoint is either a real number or positive or negative infinity, indicating the interval extends without a bound. A real interval can contain neither endpoint, either endpoint, or both endpoints, excluding any endpoint which is infinite. For example, the set of real numbers consisting of , , and all numbers in between is an interval, denoted and called the unit interval; the set of all positive real numbers is an interval, denoted ; the set of all real numbers is an interval, denoted ; and any single real number is an interval, denoted . Intervals are ubiquitous in mathematical analysis. For example, they occur implicitly in the epsilon-delta definition of continuity; the intermediate value theorem asserts that the image of an interval by a continuous function is an interval; integrals of real functions are defined over an interval; etc. Interval arithmet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Half-open Line Segment In geometry, a line segment is a part of a line (mathematics), straight line that is bounded by two distinct endpoints (its extreme points), and contains every Point (geometry), point on the line that is between its endpoints. It is a special case of an ''arc (geometry), arc'', with zero curvature. The length of a line segment is given by the Euclidean distance between its endpoints. A closed line segment includes both endpoints, while an open line segment excludes both endpoints; a half-open line segment includes exactly one of the endpoints. In geometry, a line segment is often denoted using an overline (vinculum (symbol), vinculum) above the symbols for the two endpoints, such as in . Examples of line segments include the sides of a triangle or square. More generally, when both of the segment's end points are vertices of a polygon or polyhedron, the line segment is either an edge (geometry), edge (of that polygon or polyhedron) if they are adjacent vertices, or a diagonal. Wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	TCP Half-open The term half-open refers to TCP connections whose state is out of synchronization between the two communicating hosts, possibly due to a crash of one side. A connection which is in the process of being established is also known as embryonic connection. The lack of synchronization could be due to malicious intent. RFC 793 According tRFC 793 a TCP connection is referred to as ''half-open'' when the host at one end of that TCP connection has crashed, or has otherwise removed the socket without notifying the other end. If the remaining end is idle, the connection may remain in the half-open state for unbounded periods of time. Stateful Firewall Timeout Another circumstance that can lead to half-open connections is if a stateful firewall times out a connection that is idle for too long. In this case, the firewall clears its internal state, and if either side of the connection sends a packet, the firewall will drop the packet. This will often result in a half-open connection a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]