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inferring activity time in news

The Use of Time in Flash

The Use of Time in Flash

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... setInterval() action, use the following syntax: clearInterval(myInterval); Using the syntax shown, you can initiate the setInterval() action at any time, calling any function. < Day ... following example: var myInterval:Object = setInterval(rotateClip, 1500); This example assigns the name myInterval to the setInterval() action. To remove the functionality of the setInterval() ... the setInterval() action: setInterval (updateMessageFunction, 20000, "Hello", arg2, arg3) A setInterval() action can be turned on and off by assigning a variable name, as in the...
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Tài liệu Managing time in relational databases- P1 ppt

Tài liệu Managing time in relational databases- P1 ppt

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... data in which none of that isnecessary, a world in which all pipeline datasets are contained in the single table that is their destination or their point of origin. In this world, maintaining ... systems used in education,finance, health care, insurance, manufacturing, retailing andtransportation—all industries in which the authors have hadconsulting experience. In using these methods, ... along inflow pipelines, and posted transactionsas data destined for some kind of logfile, and as moving towardsthat destination along outflow pipelines. So if we can bringpending transactions into...
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Tài liệu Managing time in relational databases- P2 pptx

Tài liệu Managing time in relational databases- P2 pptx

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... management losingfaith in data warehouse projects. As these large projects fellincreasingly behind schedule and rose increasingly over budget—something large projects tend to do—the pressure increasedto ... into the business IT commu-nity, bi-temporality was understood as a distinction betweenlogical time and physical time. Logical time, corresponding towhat computer scientists called valid time, ... bi-temporality. For while it acknowl-edged that one kind of time is a period of time, it believed that theother kind of time is a point in time. With only one temporal extentrepresented, this...
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Tài liệu Managing time in relational databases- P3 doc

Tài liệu Managing time in relational databases- P3 doc

Cơ sở dữ liệu

... point in time forward to the point in time we are interested in. But the defining feature of reconstructable methods is not themovement of data from off-line to on-line storage. The defining ... anypoint in time between the starting balance and the current bal-ance by going back to the starting balance and applying trans-actions, in chronological sequence, up to the desired point.We ... waiting for the data, and the decisionsdelayed until the data becomes available. In an increasinglyfast-paced business world, the opportunity cost of delays in accessing data is increasingly...
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Tài liệu Managing time in relational databases- P4 pptx

Tài liệu Managing time in relational databases- P4 pptx

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... lacking a standard for the PERIOD datatype, wewill continue the practice of defining periods of time in terms of their begin and endpoints in time. Chapter 3 THE ORIGINS OF ASSERTED VERSIONING: ... record of when business events happen in the realworld. In addition, for most business purposes, we assume that aSQL timestamp plus a defined interval of time will result in asecond timestamp that ... designing andmaintaining data models that must explicitly define temporaldata structures and integrity constraints on them. It alsorelieves developers of the burden of designing, writing andmaintaining...
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Tài liệu Managing time in relational databases- P5 pptx

Tài liệu Managing time in relational databases- P5 pptx

Cơ sở dữ liệu

... whether a point in time is or is not contained in a period of time. Where P and Tare, respectively, a point in time and a period of time, and T1andT2are dates delimiting T using the closed-open ... [aligns] with the time period,then it either [starts] the time period or [finishes] it. Otherwise,the point in time occurs [during] the time period. If the point in time [excludes] the time period, ... clock ticks. Thispoint in time may either [intersect] or [exclude] the time period.If the point in time [intersects] the time period, it also [fills] and[occupies] that time period. If it...
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Tài liệu Managing time in relational databases- P6 pptx

Tài liệu Managing time in relational databases- P6 pptx

Cơ sở dữ liệu

... point in time 1All effective time relationships exist within shared assertion time. Because this is soimportant to keep in mind, we will often add the qualifier “within shared assertion time ... Versioning In this variation on versioning, a logical delete flag is included in the version table. It has two values, one marking the row asnot being a delete, and the other marking the row as being ... VERSIONING97for version tables—a time period which we call assertion time, and computer scientists call transaction time effective time versioning adds a single date. Next, instead of adding this...
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Tài liệu Managing time in relational databases- P7 pdf

Tài liệu Managing time in relational databases- P7 pdf

Cơ sở dữ liệu

... truth.Temporal Integrity ConstraintsThe three integrity constraints in relational theory are entityintegrity, referential integrity and domain integrity. Entity integ-rity insures that the ... effective time than assertion time, we also present an in- line notation for single assertedManaging Time in Relational Databases. Doi: 10.1016/B978-0-12-375041-9.00006-6Copyright#2010 Elsevier Inc. ... eitherassertion time or effective time on their insert, update or deletetransactions, it will seem to them that they are maintaining data in a conventional table. This maintenance is not done by writingSQL...
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Tài liệu Managing time in relational databases- P8 pptx

Tài liệu Managing time in relational databases- P8 pptx

Cơ sở dữ liệu

... assertion time andeffective time is that two or more effective -time [intersecting]versions of the same object, in shared assertion time, would vio-late temporal entity integrity, making conflicting ... repre-sentation of a timeline and a snapshot of effective time periods,grouped by common assertion times along that timeline. Withthe in- line notation, that context, too, is not represented.Viewing the ... withinshared assertion time, even a single effective -time clock tickincluded in another version of that object already in the table.Most physical transactions against bi-temporal tables areinserts....
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Tài liệu Managing time in relational databases- P9 pdf

Tài liệu Managing time in relational databases- P9 pdf

Cơ sở dữ liệu

... against non-temporaltables insert, update or delete individual rows representing objects,transactions against asserted version tables insert into a period of time, update within a period of time, ... SCENARIO 153PART3DESIGNING, MAINTAININGAND QUERYING ASSERTEDVERSION DATABASESChapter Contents8. Designing and Generating Asserted Versioning Databases 1679. An Introduction to Temporal ... effective onthat same date.3At this point in time, the episode consi sts of a single version with an effective time period beginning in January 2010 and extending to12/31/9999. Because the effective...
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Tài liệu Managing time in relational databases- P10 docx

Tài liệu Managing time in relational databases- P10 docx

Cơ sở dữ liệu

... that each business keypoints to one and only one object by defining a unique indexon it. Nor can we simply extend the scope of the index by defin-ing a unique index on the business key plus ... biginteff_beg_dt: datetimeasr_beg_dt: datetimewellpgmcat_oid: biginteff_beg_dt: datetimeeff_end_dt: datetimeasr_end_dt: datetimerow_crt_dt: datetimeclient_wellpgm_oid: bigint eff_beg_dt: datetimeasr_beg_dt: ... thatcorrespond to rows in a conventi onal table of persistent objects.164 Part 3 DESIGNING, MAINTAINING AND QUERYING ASSERTED VERSION DATABASES In this chapter, we focus on index design, although...
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Tài liệu Managing time in relational databases- P11 doc

Tài liệu Managing time in relational databases- P11 doc

Cơ sở dữ liệu

... significantly reduces the work involved in maintainingtemporal data, and will eliminate the errors that would otherwiseinevitably happen as temporal data is maintained.Using a framework like the ... taxonomy in terms of its topology. On a line representing atimeline, we can place a line segment representing an episode.We can also remove a line segment from that line. Given a linesegment, ... continuouslyrepresented, in current assertion time, from the effective -time beginning of that version’s episode to the effective -time end ofthat version. Since the parent managed object in a...
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Tài liệu Managing time in relational databases- P12 pdf

Tài liệu Managing time in relational databases- P12 pdf

Cơ sở dữ liệu

... effective time it affects. As a relationship between a point in time and aperiod of time, the basic options are that the point in time canbe earlier than the period of time, within the period of time, ... will continue on, and willupdate the database. In doing so, it will begin by preserving theoriginal state of the version or versions about to be changed,doing this by withdrawing them into past ... shown in Figure 10.3.Episode C, as we have labeled it, is a single-version episode.Ofcourse allepisodes, when initially created, are single-versionepisodes. Using the in- line notation introdu...
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Tài liệu Managing time in relational databases- P13 pdf

Tài liệu Managing time in relational databases- P13 pdf

Cơ sở dữ liệu

... always ends theassertion time period of the version it supercedes, withdrawingthat original version into past assertion time. Consequently,since temporal integrity constraints apply only among ... 2012, into the indefinite future.The first physical transaction step in this deletion is to with-draw versions 9 and 4 since each of them has at least one clocktick included in the timespan ... orpartially included within its timespan. If one version is partiallywithin the timespan, the temporal delete will replace the partof that withdrawn version not within its timespan. In either...
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