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| | Time - Wikipedia, the free encyclopedia |
 | | Leibniz and others thought of time as a fundamental part of an abstract conceptual framework, together with space and number, within which we sequence events, quantify their duration, and compare the motions of objects. | | | A tesseract, a cube in 3 dimensions extended to a fourth, as a description of time; adhering to defined finite bounds, all possibilities for this configuration are conceptually representable. | | | However, some aspects of time use are relatively stable over long periods of time, such as the amount of time spent traveling to work, which despite major changes in transport, has been observed to be about 20-30 minutes one-way for a large number of cities over a long period of time. |
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http://en.wikipedia.org/wiki/Time
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| | 6.11 time -- Time access and conversions |
| | The precision, and in fact the very definition of the meaning of ``processor time'', depends on that of the C function of the same name, but in any case, this is the function to use for benchmarking Python or timing algorithms. | | | Because of this, it is platform-specific except for recognizing UTC and GMT which are always known (and are considered to be non-daylight savings timezones). | | | DST is Daylight Saving Time, an adjustment of the timezone by (usually) one hour during part of the year. |
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http://www.python.org/doc/current/lib/module-time.html
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| | CATHOLIC ENCYCLOPEDIA: Time |
| | Every mind distinguishes in time the past, the present, and the future, that is parts which essentially exclude simultaneity and can be realized only one after the other. | | | To Kant and his followers time is an a priori form, a natural disposition by virtue of which the inner sense clothes the acts of the external senses, and consequently the phenomena which these acts represent, with the distinctive characteristics of time. | | | Clarke and Newton, identify time with the eternity of God or regard it as an immediate and necessary result of God's existence, so that, even were there no created beings, the continuation of the Divine existence would involve as its consequence, duration, or time. |
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http://www.newadvent.org/cathen/14726a.htm
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| | Time [Internet Encyclopedia of Philosophy] |
| | The string theory of quantum gravity predicts that time is continuous, but the main alternative to string theory, loop quantum gravity, does not. | | | One is to clarify the relationship between time and the mind. | | | In one sense, which is not the sense meant by the phrase "the arrow of time," time is directed from the future to the past. |
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http://www.utm.edu/research/iep/t/time.htm
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| | Time |
| | According to The 4D View, temporally extended objects have temporal parts, temporal extension is perfectly analogous to spatial extension, and time is one of four dimensions that are on a par, at least with respect to the manner in which objects are spread out in space-time. | | | But there is some controversy in the philosophy of time over whether extension in time is analogous to extension in space. | | | On this view, an object at a time -- Descartes in 1625, for example -- is the same thing as the whole object-- Descartes. |
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http://plato.stanford.edu/entries/time
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| | Time Travel and Modern Physics |
| | Let us further assume that the development of P in time, and the dependence of that development on the state of objects that it interacts with, is continuous. | | | There has been a particularly clear treatment of time travel in the context of quantum mechanics by David Deutsch (see Deutsch 1991, and Deutsch and Lockwood 1994) in which it is claimed that quantum mechanical considerations show that time travel never imposes any constraints on the pre-time travel state of systems. | | | It is ironic that time travel should lead generically not to contradictions or to constraints (in the normal region) but to underdetermination of what happens in the time travel region by what happens everywhere else (an underdetermination tied neither to a probabilistic dynamics or to a free edge to space-time). |
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http://plato.stanford.edu/entries/time-travel-phys
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| | Computational complexity theory - Wikipedia, the free encyclopedia |
| | The time complexity of a problem is the number of steps that it takes to solve an instance of the problem as a function of the size of the input (usually measured in bits), using the most efficient algorithm. | | | At least for time complexity, and for polynomial-time decision problems, this is determined by the time hierarchy theorem. | | | Complexity theory is part of the theory of computation dealing with the resources required during computation to solve a given problem. |
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http://en.wikipedia.org/wiki/Computational_complexity_theory
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| | Complexity - Wikipedia, the free encyclopedia |
| | In computational complexity theory, the time complexity of a problem is the number of steps that it takes to solve an instance of the problem as a function of the size of the input (usually measured in bits), using the most efficient algorithm. | | | In algorithmic information theory, the Kolmogorov complexity (also called descriptive complexity or algorithmic entropy) of a string is the length of the shortest binary program which outputs that string. | | | Computational complexity theory is the study of the complexity of problems - that is, the difficulty of solving them. |
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http://en.wikipedia.org/wiki/Complexity
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| | Seek time - Wikipedia, the free encyclopedia |
| | Floppy disk drives and optical drives (such as CD or DVD drives) have much larger head assemblies than hard discs, resulting in them having longer seek times. | | | Seek time is one of the several delays associated with reading or writing data on a computer's disk drive. | | | Seek time for a given disk varies depending on how far the head's destination is from its origin at the time of each read or write instruction; usually one discusses a disk's average seek time. |
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http://www.wikipedia.org/wiki/Seek_time
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| | Access time - Wikipedia, the free encyclopedia |
| | In a computer, the time interval between the instant at which an instruction control unit initiates a call for data and the instant at which delivery of the data is completed. | | | In magnetic disk devices, the time for the access arm to reach the desired track and the delay for the rotation of the disk to bring the required sector under the read-write mechanism. | | | The time interval between the instant at which storage of data is requested and the instant at which storage is started. |
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http://en.wikipedia.org/wiki/Access_time
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| | Unix time - Wikipedia, the free encyclopedia |
| | The earliest versions of Unix time had a 32-bit integer incrementing at a rate of 60 Hz, which was the rate of the system clock on the hardware of the early Unix systems. | | | As a result, Unix times such as 915 148 799.50, apparently in the second preceding a leap second, are de facto ambiguous, as are (both de facto and de jure) times such as 915 148 800.50. | | | Instead, times with sub-second precision are represented using compound data types that consist of two integers, the first being a time_t (the integral part of the Unix time), and the second being the fractional part of the time number in millionths (in struct timeval) or billionths (in struct timespec). |
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http://en.wikipedia.org/wiki/Unix_time
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| | Time code ambiguity - Wikipedia, the free encyclopedia |
| | For example, in a time code in which year-of-century (the '72' in 10/04/72) is the most slowly changing field, the time code ambiguity would be 100 years; it is ambiguous whether this value refers to a date in 1872, 1972 or some other century. | | | The Year 2000 bug is an example of the pitfalls of time code ambiguity. | | | In telecommunication, time code ambiguity is the shortest interval between successive repetitions of the same time code value. |
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http://en.wikipedia.org/wiki/Time_code_ambiguity
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| | Response time - Wikipedia, the free encyclopedia |
| | High response times can be annoying to a viewer depending on the type of data being displayed and how rapidly the image is changing or moving. | | | Note: For example, in data processing, the response time perceived by the end user is the interval between | | | In a data system, the system response time is the interval between the receipt of the end of transmission of an inquiry message and the beginning of the transmission of a response message to the station originating the inquiry. |
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http://en.wikipedia.org/wiki/Response_time
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| | [sci.astro] Time (Astronomy Frequently Asked Questions) (3/9) |
| | COMPUTING RISE AND SET TIMES ---------------------------- To compute when an object rises or sets, you must compute when it passes the meridian and the HA of rise/set. | | | COMPUTING THE SUN'S POSITION ---------------------------- To be able to compute the Sun's rise/set times, you need to be able to compute the Sun's position at any time. | | | When HA0 has been computed, leave it as it is for the Sun but multiply by 365.2422/366.2422 for stellar objects, to convert from sidereal to solar time. |
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http://www.faqs.org/faqs/astronomy/faq/part3
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| | Time-sharing - Wikipedia, the free encyclopedia |
| | Another modern idea relating to time sharing are distributed computing projects. | | | Time-sharing is an approach to interactive computing in which a single computer is used to provide apparently simultaneous interactive general-purpose computing to multiple users by sharing processor time. | | | And remember all this is possible with “backwards” time sharing, as now there is one problem being run on many smaller computers instead of the traditional implementation of several problems simultaneously run on one central system. |
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http://en.wikipedia.org/wiki/Time-sharing
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| | fUSION Anomaly. Time |
| | Because mean solar time is based on the motion of a hypothetical sun, a base position was established from which the mean time can be calculated. | | | Used to indicate the number of instances by which something is multiplied or divided: This tree is three times taller than that one. | | | It may be said, indeed, that each distinct variation in the pattern of temporal recognition constitutes an entirely different universe of perception. |
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http://fusionanomaly.net/time.html
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| | PlanetMath: time complexity |
| | This is version 5 of time complexity, born on 2001-10-18, modified 2005-04-18. | | | Time complexity refers to a function describing how much time it will take an algorithm to execute, based on the parameters of its input. | | | Complexity classes are equivalence classes of time complexities which are ``equal'' in Big-O notation. |
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http://planetmath.org/encyclopedia/TimeComplexity.html
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| | Compiler - Wikipedia, the free encyclopedia |
| | A compiler is a computer program that translates a series of statements written in one computer language (called the source code) into a resulting output in another computer language (often called the object or target language). | | | Compilers which are capable of producing both native and foreign binary output may be called either a cross-compiler or a native compiler depending on a specific use, although it would be more correct to classify them as a cross-compilers. | | | Building a self-hosting compiler is a bootstrapping problem -- the first such compiler for a language must be compiled either by a compiler written in a different language, or (as in Hart and Levin's Lisp compiler) compiled by running the compiler in an interpreter. |
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http://en.wikipedia.org/wiki/Compiler
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| | Beyond Access Time |
| | Average seek time - the time it takes for the head to be positioned over the data- is usually calculated by taking an average of worst-case and best-case scenarios or the time it takes for the head to move one-third the radius of the disk. | | | As with seek time, rotational latency is usually given as an average of worst-case and best-case scenarios and is equal to the time it takes for the disk to spin half a rotation. | | | Access time is the measurement of time it takes for the requested data to reach the computer. |
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http://www.infotivity.com/mark_n.htm
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| | ScienceDaily: Network Time Protocol |
| | The Network Time Protocol (NTP) is a protocol for synchronising the clocks of computer systems over packet-switched, variable-latency data networks. | | | Since this only requires time accurate to a few decades, this is not a problem in general use. | | | NTP Public Services Project This is the home for the NTP (Network Time Protocol) Public Services Project which provides public support for the NTP Project and the IETF NTP Working Group. |
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http://www.sciencedaily.com/encyclopedia/network_time_protocol
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| | Response Time |
| | Traditionally, response time is often defined as the interval from when a user initiates a request to the instant at which the first part of the response is received at by the application. | | | For example response time in a web based booking system, that contains a banner advertising mechanism, may or may not include the time taken to download and display banner adds, depending on your interest in the project. | | | The display is updated after the computations for rendering the screen have been performed, and those computations may be very sophisticated and take a considerable amount of time. |
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http://www.loadtest.com.au/Terminology/ResponseTime.htm
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| | The Creation of the UNIX Operating System: An Overview of the UNIX* Operating System |
| | A major contribution of the UNIX system was its portability, permitting it to move from one brand of computer to another with a minimum of code changes. | | | Although UNIX was developed by programmers for programmers, it provides an environment so powerful and flexible that it is found in businesses, sciences, academia, and industry. | | | UNIX e-mail at first permitted users on the same computer to communicate with each other via their terminals. |
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http://www.bell-labs.com/history/unix/tutorial.html
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| | 6.11 time -- Time access and conversions |
| | The precision, and in fact the very definition of the meaning of ``processor time'', depends on that of the C function of the same name, but in any case, this is the function to use for benchmarking Python or timing algorithms. | | | On many Unix systems (including *BSD, Linux, Solaris, and Darwin), it is more convenient to use the system's zoneinfo (tzfile(5)) database to specify the timezone rules. | | | DST is Daylight Saving Time, an adjustment of the timezone by (usually) one hour during part of the year. |
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http://www.python.org/doc/current/lib/module-time.html
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| | Time Delay Relays from ATC Diversified Electronics |
| | When voltage is applied to the input terminals, the relay energizes and the time delay begins. | | | When voltage is applied to the input, the internal relay picks up and the time delay begins regardless of the position of the control switch. | | | With the switch in the closed position when voltage is applied the timer will complete its time delay period and the internal relay will drop out if the switch is not opened and reclosed before the completion of the time delay period. |
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http://www.automatictiming.com/pages_div/timedelayrelays.html
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| | Response Time Overview |
| | Normally, response times should be as fast as possible, but it is also possible for the computer to react so fast that the user cannot keep up with the feedback. | | | The fact that computers can be too fast indicates the need for user-interface changes, like animations, to be timed according to a real-time clock rather than being timed as an indirect effect of the computer's execution speed: Even if a faster model computer is substituted, the user interface should stay usable. | | | Therefore, the response time guidelines for web-based applications are the same as for all other applications. |
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http://www.useit.com/papers/responsetime.html
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| | TIME COMPLEXITY |
| | Specialty definitions using "TIME COMPLEXITY": Bellman-Ford algorithm, binary GCD algorithm ♦ Dijkstra's algorithm ♦ Floyd-Warshall algorithm ♦ Johnson's algorithm ♦ Quicksort ♦ space complexity. | | | O(N^2) means that if the size of the problem (N) doubles then the algorithm will take four times as many steps to complete. | | | The way in which the number of steps required by an algorithm varies with the size of the problem it is solving. |
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http://www.websters-online-dictionary.org/ti/time+complexity.html
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| | Definition: seek time |
| | seek time: The time required for the access arm of a direct-access storage device to be positioned on the appropriate track. |
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http://www.atis.org/tg2k/_seek_time.html
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| | IBM: The Economic Value of Rapid Response Time |
| | Response time improvements do not lessen the demand for processing; they speed up the performance of tasks by compressing computing into a shorter time span. | | | Research on rapid response time now indicates that this earlier theory is not borne out by the facts: productivity increases in more than direct proportion to a decrease in response time. | | | This is the time span between the moment the user enters a command and the moment a complete response is displayed on the terminal. |
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http://www.vm.ibm.com/devpages/jelliott/evrrt.html
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| | Definition: time code ambiguity |
| | Note: For example, in a time code in which year-of-century is the most slowly changing field, the time code ambiguity would be 100 years; for a digital clock in which hours and minutes up to a maximum of 11:59 are displayed, the time code ambiguity would be 12 hours. | | | time code ambiguity: The shortest interval between successive repetitions of the same time code value. |
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http://www.atis.org/tg2k/_time_code_ambiguity.html
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