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Conditional Dependencies: A Principled Approach to Improving Data Quality [chapter]

Wenfei Fan, Floris Geerts, Xibei Jia
2009 Lecture Notes in Computer Science  
Real-life date is often dirty and costs billions of pounds to businesses worldwide each year. This paper presents a promising approach to improving data quality.  ...  In contrast to traditional dependencies that were developed for improving the quality of schema, the revised constraints are proposed to improve the quality of data.  ...  ., to identify complex objects that refer to the same realworld entity, when the objects do not have a regular structure.  ... 
doi:10.1007/978-3-642-02843-4_4 fatcat:t3euzghi65hlzdxa7kbmqsxkn4

Dynamic path conditions in dependence graphs

Christian Hammer, Martin Grimme, Jens Krinke
2006 Proceedings of the 2006 ACM SIGPLAN symposium on Partial evaluation and semantics-based program manipulation - PEPM '06  
The approach described here has been implemented for full ANSI-C. It uses the static dependence graph to produce a finegrained variable and dependence trace of an executing program.  ...  We present a new approach combining dynamic slicing with path conditions in dependence graphs enhanced by dynamic information collected in a program trace.  ...  Especially in recently discovered applications of dynamic slicing, like improving software quality and security, such a condition may be able to rule out an undesirable or even illegal influence between  ... 
doi:10.1145/1111542.1111552 dblp:conf/pepm/HammerGK06 fatcat:ndc262n3y5c37mgyb6jkabvmh4

Conditional Spatial Policy Dependence

Eric Neumayer, Thomas Plümper
2012 Comparative Political Studies  
Specifically, comprehensive theories of spatial policy dependence will typically suggest that the jurisdictions receiving spatial stimuli systematically differ in their exposure to such signals as a function  ...  Abstract When the policy choice in one jurisdiction depends on those of other jurisdictions, then policies are said to be spatially dependent.  ...  This form of deliberate learning occurs when government representatives seek to solve a problem, i.e. improve the outcomes in a certain area by trying to find a suitable policy reform (Baturo and Gray  ... 
doi:10.1177/0010414011429066 fatcat:wdgb4z6ypzc7jdqyyqidegn75q

Target and Conditional Sensitivity Analysis with Emphasis on Dependence Measures [article]

Hugo Raguet, Amandine Marrel
2018 arXiv   pre-print
Nonparametric measures of dependence being well-suited to this approach, we also make a review of available methods and of their use for sensitivity analysis, and clarify some of their properties.  ...  We make a brief history of related approaches in the literature, and propose a more general and systematic approach.  ...  The principle is to apply a decreasing function to dependence measures of the group of factors complementary to the one investigated.  ... 
arXiv:1801.10047v2 fatcat:72zcug7qjre3feilfmwq7uq3xq

Improving the Data Quality of Drug Databases using Conditional Dependencies and Ontologies

Olivier Curé
2012 Journal of Data and Information Quality  
The poor data quality of these databases, e.g. inaccuracy of drug contraindications, can lead to catastrophic consequences on the health condition of patients.  ...  Hence it is important to ensure their quality in terms of data completeness and soundness.  ...  Functional and INclusion Dependencies (henceforth denoted FDs and INDs). For instance, [Fan 2008] highlights an attempt to improve data quality using conditional dependencies.  ... 
doi:10.1145/2378016.2378019 dblp:journals/jdiq/Cure12 fatcat:spepfriflnhqrjpwrvcacvlxoy

Using a condition‐dependent approach to maintenance to control costs and performances

Ad Straub
2002 Journal of Facilities Management  
A condition-dependent approach to planned maintenance leads to a decoupling of quality assessment from the determination of maintenance activities.  ...  By adopting a condition-depended approach to maintenance, facility managers can exercise control over the desired maintenance performance levels and costs.  ...  The application of performance-based maintenance contracts implies a condition-dependent approach to maintenance.  ... 
doi:10.1108/14725960310808079 fatcat:nlhimzwl7bcmxghg5pywi5k7v4

Measuring School Demand in the Presence of Spatial Dependence. A Conditional Approach

Laura LLpez Torres, Diego Prior
2014 Social Science Research Network  
Moreover, families in Spain appear to choose a school on the grounds of location.  ...  Improving educational quality is an important public policy goal. However, its success requires identifying factors associated with student achievement.  ...  Acknowledgements The authors are grateful to the Consell Superior d'Avaluació del Sistema Educatiu de Catalunya for providing the data, with a special mention to Dr. Paquita Grané-Terradas.  ... 
doi:10.2139/ssrn.2539041 fatcat:3s7l3j25k5ac3bjgu5emvl7dcq

Dependence Calibration in Conditional Copulas: A Nonparametric Approach

Elif F. Acar, Radu V. Craiu, Fang Yao
2010 Biometrics  
In many cases, the strength of dependence between two or more random variables varies according to the values of a measured covariate.  ...  In order to estimate the functional relationship between the copula parameter and the covariate, we propose a nonparametric approach based on local likelihood.  ...  Acknowledgements We would like to thank the co-editor, the associate editor, and the two referees for their careful review and constructive comments that have helped significantly improve the quality and  ... 
doi:10.1111/j.1541-0420.2010.01472.x pmid:20731648 fatcat:phzikjc7ujb2nh5guzjpl5pure

Effective economic growth under conditions of regional water management dependence

Svitlana Fedulova, Volodymyr Dubnytskyi, Nataliia Naumenko, Vitalina Komirna, Iryna Melnikova, Batyrhan Agabekov
2021 Agricultural and Resource Economics  
A scientific and methodological approach to assessing the level of needs of regional socio-economic systems in water resources has been improved, based on the application of the index of regional water  ...  The methodological bases for assessing the impact of the spatial economy on regional development under conditions of limited water resources have been improved, which differ in substantiating the dependence  ...  , have the right of access to drinking water that meets the needs of quality and quantity.  ... 
doi:10.51599/are.2021.07.01.02 fatcat:bcmq2ms4zrfqjjd3wtq7qnwgpq

Effective Pruning for the Discovery of Conditional Functional Dependencies

J. Li, J. Liu, H. Toivonen, J. Yong
2012 Computer journal  
Conditional Functional Dependencies (CFDs) have been proposed as a new type of semantic rules extended from traditional functional dependencies.  ...  We evaluate the proposed algorithm on a number of medium to large real world data sets.  ...  It is important for an organisation to have a complete set of integrity constraints that reflect the organisation's policies and domain semantics to improve and maintain the data quality of the organisation  ... 
doi:10.1093/comjnl/bxs082 fatcat:m66ktb27r5hzlitdmgynd6rxvq

Data-Dependent Conditional Priors for Unsupervised Learning of Multimodal Data

Frantzeska Lavda, Magda Gregorová, Alexandros Kalousis
2020 Entropy  
By learning data-dependent conditional priors, the new variational objective naturally encourages a better match between the posterior and prior conditionals, and the learning of the latent categories  ...  Through sampling continuous latent code from the data-dependent conditional priors, we are able to generate new samples from the individual mixture components corresponding, to the multimodal structure  ...  Data-Dependent Conditional Priors There is no straightforward way to fix the parameters ϕ = (µ, σ) in the distributions Equation ( 9 ) for each of the conditioning categories c k a priori.  ... 
doi:10.3390/e22080888 pmid:33286658 fatcat:onxleyfy4ngldfz6ta236ut6oe

Condition-based prediction of time-dependent reliability in composites

Juan Chiachío, Manuel Chiachío, Shankar Sankararaman, Abhinav Saxena, Kai Goebel
2015 Reliability Engineering & System Safety  
A case study is presented using multi-scale fatigue damage data from a cross-ply carbon-epoxy laminate.  ...  A set of damage states are further propagated forward in time by simulating the damage progression using the models in absence of new damage measurements to estimate the time-dependent reliability of the  ...  while it depends less on the data quality.  ... 
doi:10.1016/j.ress.2015.04.018 fatcat:cb7rowtdljb67mf5sny6w7jff4

Constraints on rapidity-dependent initial conditions from charged-particle pseudorapidity densities and two-particle correlations

Weiyao Ke, J. Scott Moreland, Jonah E. Bernhard, Steffen A. Bass
2017 Physical Review C  
A cumulant-generating function is used to parametrize the rapidity dependence of local entropy deposition and extend arbitrary boost-invariant initial conditions to nonzero beam rapidities.  ...  The optimized initial conditions are then compared to a number of experimental observables including two-particle rapidity correlations, the rapidity dependence of anisotropic flow, and event-plane decorrelations  ...  We thank Jianyong Jia for providing ATLAS preliminary data and Jacquelyn Noronha-Hostler for useful discussion.  ... 
doi:10.1103/physrevc.96.044912 fatcat:nfa3hmu2sneannb2phbvuxraiy

A model of function-level fault tolerance of navigation signals provision processes in adverse conditions

S. M. Klimov, A. Yu. Polovnikov, A. P. Sergeev
2017 Dependability  
The adverse conditions of provision of navigation data (signals) to consumers are understood as a set of undesirable events and statuses of reception and processing of navigation data with possible distortions  ...  A model of function-level fault tolerance of navigation signals provision processes in adverse conditions. Dependability,2017;2: 41-47.  ...  of quality navigation services to the consumer.  ... 
doi:10.21683/1729-2646-2017-17-2-41-47 fatcat:f2mj6yt5mzf6fpqxafifrl4ozq

Dependence of Piezoelectric Discs Electrical Impedance on Mechanical Loading Condition

Niharika Gogoi, Jie Chen, Jens Kirchner, Georg Fischer
2022 Sensors  
respect to the rectifiers containing diodes and switches, which represent a nonlinear electrical load.  ...  Sensing, actuation, and energy harvesting are major implementations of piezoelectric structures in structural health monitoring, wearable devices, and self-powered systems, to name only a few.  ...  Data Availability Statement: Not applicable. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s22051710 pmid:35270855 pmcid:PMC8914625 fatcat:aa55qifp7rewxagnp5efobrt5m
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