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Object-Relational Representation of a Conceptual Model for Temporal Data Warehouses
[chapter]
2006
Lecture Notes in Computer Science
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In this paper, we present a mapping transforming our conceptual model for TDW design into the conventional ER and an object-relational models. ...
We include the mapping for time-varying levels, hierarchies, and measures. We also discuss the inconveniences of a pure relational representation. ...
In this paper, we present a mapping of a conceptual model for time-varying multidimensional data into a classical ER and into an object-relational (OR) models. ...
doi:10.1007/11767138_8
fatcat:wevoenj26vhidguwlospz55sd4
Temporal Modeling and ORM
[chapter]
2008
Lecture Notes in Computer Science
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While the data modeling discussion focuses on Object-Role Modeling (ORM), many of the basic principles discussed can be adapted to other approaches such as Entity Relationship Modeling (ER) and the Unified ...
One difficult task in information modeling is to adequately address the impact of time. ...
But Rmap punishes the modeler for this choice by mapping to the 2-table relational schema (Fig. 4(e) ) instead of the simpler 1-table schema (Fig. 4(d) ) obtained from the nested or coreferenced schemas ...
doi:10.1007/978-3-540-88875-8_93
fatcat:6aye2jnbdjhslhnmepuyzbcxfm
Chapter 3: Conceptual Models for Spatio-temporal Applications
[chapter]
2003
Lecture Notes in Computer Science
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In the UML approach, an extension of UML, Extended spatio-temporal UML [26] , is presented that addresses spatio-temporal modeling requirements. ...
In order to satisfy the requirement for a clear, simple, and consistent notation, the extension introduces a small base set of modeling constructs for spatio-temporal data. ...
We incorporate the proposed modeling constructs into the ER model ( [5] ), resulting in the semantically richer Spatio-Temporal ER (STER) model [33] . ...
doi:10.1007/978-3-540-45081-8_3
fatcat:3shmwtnwqbdi7oh37qxdnotqte
Improved Modeling of β Electronic Recoils in Liquid Xenon Using LUX Calibration Data
[article]
2019
arXiv
pre-print
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This paper also presents techniques used for modeling complicated temporal and spatial detector pathologies that can adversely affect data using a simplified model framework. ...
The methods outlined in this report show an example of the robust applications possible with NEST v2.0, while also providing the final electronic recoil model and detector parameters that will used in ...
Denny Sanford, and is operated by Lawrence Berkeley National Laboratory for the Department of Energy, Office of High Energy Physics. ...
arXiv:1910.04211v1
fatcat:tnrm7oih3ve7dobqu4vijpv67u
Modeling Concept Evolution: A Historical Perspective
[chapter]
2009
Lecture Notes in Computer Science
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Our proposal extends an RDF-like model with temporal features and evolution operators. Then we provide a query language that exploits these extensions and supports historical queries. ...
Likewise, a caterpillar is transformed into a butterfly, while a mother becomes two (maternally-related) entities. ...
To cope with the history of data changes, temporal models have been proposed for the relational [5] and ER [6] models, for semi-structured data [7] , XML [8] and for RDF [9] . ...
doi:10.1007/978-3-642-04840-1_25
fatcat:qktfv4zqtnbg5m6fej5fds6wo4
An extended algebra for constraint databases
1998
IEEE Transactions on Knowledge and Data Engineering
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First, we show that the relational model is not the only possible semantic reference model for constraint relational databases and we show how constraint relations can be interpreted under the nested relational ...
For their characteristics, constraint databases are well suited to model multidimensional and structured data, like spatial and temporal data. ...
When input/output relations are nested objects, the equivalence is guaranteed by the use of object identi ers to code nested objects into at ones 39]. ...
doi:10.1109/69.729722
fatcat:ilma452c45dslfyht2j7yobg6i
Decidability Results for Metric and Layered Temporal Logics
1996
Notre Dame Journal of Formal Logic
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The logics we consider are suitable to model time granularity in various contexts, and they allow one to build granular temporal models by referring to the'natural scale' in any component of the model ...
of nitely-layered metric temporal structures is shown to be decidable. ...
Furthermore, if 2 L LM , then 2 L M .
binary congruence relation d partitions the set of time instants into d disjoint classes. ...
doi:10.1305/ndjfl/1040046089
dblp:journals/ndjfl/MontanariP96
fatcat:5cqwsvalmvg3hmofr45e6jqh2y
A Temporal Description Logic for Reasoning about Actions and Plans
1998
The Journal of Artificial Intelligence Research
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The former adds disjunction both at the temporal and non-temporal sides of the language, the latter extends the non-temporal side with set-valued features (i.e., roles) and a propositionally complete language ...
Actions are represented by describing what is true while the action itself is occurring, and plans are constructed by temporally relating actions and world states. ...
The work was partially supported by the Italian National Research Council CNR project Ontologic and Linguistic Tools for Conceptual Modeling", and by the Foundations of Data Warehouse Quality" DWQ European ...
doi:10.1613/jair.516
fatcat:uiviktjatrhnjnrys55xgfk53m
A web-enabled extension of a spatio-temporal DBMS
2007
Proceedings of the 15th annual ACM international symposium on Advances in geographic information systems - GIS '07
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This paper describes the design and implementation of a webbased spatio-temporal information system. ...
In strong contrast, there exist only very few proposals for an implementation of a spatio-temporal database system let alone a web-based spatio-temporal information system. ...
Secondo accepts SQL queries and returns the results in the nested list format. Hence a Converter converts WFS requests into SQL expressions and transforms the nested list into GML. ...
doi:10.1145/1341012.1341056
dblp:conf/gis/InnerebnerBT07
fatcat:f5awhty7cbhi3gd5kzpvww2wge
Dense Time Logic Programming
1996
Journal of symbolic computation
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We then look at an important subset of omega trees called ordinal trees that represent only meaningful dense time models. ...
Temporal resolution tries to prove temporal queries from a set of temporal facts and rules using a process called aligning which provides the counterpart of the conventional unification algorithm. ...
(Satisfaction) A goal G is said to be satisfied in an extended Herbrand model if all the ground instances Gθ are satisfied in the extended Herbrand model according to the map defined above for temporal ...
doi:10.1006/jsco.1996.0067
fatcat:2seedtjy2nde5hnjd3vxlbezmy
Modeling time from a conceptual perspective
1998
Proceedings of the seventh international conference on Information and knowledge management - CIKM '98
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Finally, it is shown how the model may be implemented on top of either TSQL2 or a traditional, non-temporal data model. ...
ABSTRACT Although many temporal models have been proposed in the literature, there is still need for a conceptual model capturing the essential semantics of time-varying information that is free of implementation ...
Moreover, algorithms mapping ERC+ or a similar model into an object-oriented model (e.g., ODMG's ODL) or a relational model are well known. ...
doi:10.1145/288627.288693
dblp:conf/cikm/SpaccapietraPZ98
fatcat:niguwdkaorg6jhsywsn4u3fsc4
Marvel: A Data-centric Compiler for DNN Operators on Spatial Accelerators
[article]
2020
arXiv
pre-print
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The efficiency of a spatial DNN accelerator depends heavily on the compiler and its cost model ability to generate optimized mappings for various operators of DNN models on to the accelerator's compute ...
Furthermore, we introduce a transformation for translating mappings into the MDC notation for exploring the mapping space. ...
., the level-3 inter-tile loop order (t 3 j ,t 3i ) dictates the temporal map over d W outer compared to temporal map over d O in region R5. ...
arXiv:2002.07752v2
fatcat:xne5x44lm5grzfv336swsbpd2m
:{unav)
2012
Geoinformatica
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Spatio-temporal databases aim to support extensions to existing models of Spatial Information Systems (SIS) to include time in order to better describe our dynamic environment. ...
Although interest into this area has increased in the past decade, a number of important issues remain to be investigated. ...
Egenhofer and Al-Taha [25] , on the other hand, examine topological relationships of 2-D objects in 2-D space when undergoing gradual changes. ...
doi:10.1023/a:1009800916313
fatcat:4ubci6ufove2tb44kkpkhacz24
A new content-based access method for video databases
1999
Information Sciences
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This paper presents a novel video data model and a nested annotation language for describing complex information of video data. ...
In contrast to conventional approaches, the proposed model classi®es dierent video materials of interest to users into dierent representation frameworks according to their individual properties. ...
Type 2 deals with temporal relations of video data. Types 3 and 4 concern the vague properties of objects/ events. ...
doi:10.1016/s0020-0255(99)00033-x
fatcat:zehduow7qreqvjtdbhba4hrxme
On the representation of infinite temporal data and queries (extended abstract)
1991
Proceedings of the tenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems - PODS '91
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An all-answer temporal query is a function mapping any given database into a temporal relation, that is, into a subset of T m (the m-tuples of time instants at which the query holds for the given database ...
Other results relate Templog queries and various logics such as TL, a temporal logic extended with xpoint quanti ers Var88] , and ETL f , a temporal logic extended with automaton-operators WVS83]. ...
doi:10.1145/113413.113439
dblp:conf/pods/BaudinetNW91
fatcat:ket5al6vtjg63m3gwm62agkpiu
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