Browsing by Author "Karagrigoriou, Alex"
Now showing items 21-40 of 53
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Article
Forecasting ARMA models: A comparative study of information criteria focusing on MDIC
Mantalos, Panagiotis; Mattheou, K.; Karagrigoriou, Alex (2010)This paper deals with the implementation of model selection criteria to data generated by ARMA processes. The recently introduced modified divergence information criterion is used and compared with traditional selection ...
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Conference Object
Generalized divergence measures for survival and reliability data
Vonta, Filia; Karagrigoriou, Alex (2012)Measures of divergence or discrepancy are used either to measure mutual information concerning two variables or to construct model selection criteria. In this paper we are focusing on divergence measures that are based on ...
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Article
Generalized measures of divergence in survival analysis and reliability
Vonta, Filia; Karagrigoriou, Alex (2010)Measures of divergence or discrepancy are used either to measure mutual information concerning two variables or to construct model selection criteria. In this paper we focus on divergence measures that are based on a class ...
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Article
Goodness-of-fit tests for reliability modeling
Karagrigoriou, Alex (2012)In this work we provide goodness-of-fit (GoF) tests which are based on measures of divergence and can be used for assessing the appropriateness of both discrete and continuous distributions. The main focus is on continuous ...
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Article
Goodness-of-fit tests via φ-measures of divergence for censored data
Vonta, Filia; Karagrigoriou, Alex (2014)Measures of divergence or discrepancy are used extensively in statistics in various fields. In this article, we are focusing on divergence measures that are based on a class of measures known as Csiszar's divergence measures. ...
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Article
Greek Cypriot allele and genotype frequencies for amplitype® PM-DQA1 and D1S80 loci
Cariolou, Marios A.; Manoli, Panayiotis; Christoforou, Maria; Bashiardes, Evy; Karagrigoriou, Alex; Budowle, Bruce (1998)A sample from the Greek Cypriot population was typed at seven forensically important PCR-based loci: LDLR, GYPA, HBGG, D7S8, GC, HLA-DQA1, and D1S80. The results showed that all loci meet Hardy-Weinberg expectations and ...
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Article
An improved divergence information criterion for the determination of the order of an ar process
Mantalos, Panagiotis; Mattheou, K.; Karagrigoriou, Alex (2010)In this article we propose a modification of the recently introduced divergence information criterion (DIC, Mattheou et al., 2009) for the determination of the order of an autoregressive process and show that it is an ...
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Article
A maximum entropy type test of fit
Lee, S.-J.; Vonta, Filia; Karagrigoriou, Alex (2011)In this paper, we propose a test of fit based on maximum entropy. The asymptotic distribution of the proposed test statistic is established and a corrected form for small and medium sample sizes is furnished. The performance ...
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Article
MeDIP real-time qPCR of maternal peripheral blood reliably identifies trisomy 21
Tsaliki, Evdokia; Papageorgiou, Elisavet A.; Spyrou, Christiana; Koumbaris, George L.; Kypri, Elena; Kyriakou, Skevi; Sotiriou, Chrysovalanto; Touvana, Evi; Keravnou, Anna; Karagrigoriou, Alex; Lamnissou, Klea; Velissariou, Voula; Patsalis, Philippos C. (2012)Objective: To reevaluate the efficiency of the 12 differentially methylated regions (DMRs) used in the methylated DNA immunoprecipitation (MeDIP) real-time quantitative polymerase chain reaction (real-time qPCR) based ...
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Article
Message from the stochastic models and methods in life sciences section chair
Karagrigoriou, Alex (2016)
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Article
A model selection criterion based on the BHHJ measure of divergence
Mattheou, K.; Lee, S.-J.; Karagrigoriou, Alex (2009)The aim of this work is the discussion and investigation of measures of divergence and model selection criteria. A recently introduced measure of divergence, the so-called BHHJ measure (Basu, A., Harris, I.R., Hjort, N.L., ...
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Article
Modeling and inference for multi-state systems
Barbu, Vlad Stefan; Karagrigoriou, Alex (2018)In this work we are focused on multi-state systems modeled by means of a special type of semi-Markov processes. The sojourn times are seen to be independent not necessarily identically distributed random variables and ...
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Article
A new family of divergence measures for tests of fit
Mattheou, K.; Karagrigoriou, Alex (2010)Summary: The aim of this work is to investigate a new family of divergence measures based on the recently introduced Basu, Harris, Hjort and Jones (BHHJ) measure of divergence (Biometrika 85, 549-559). The new family is ...
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Article
A new non-invasive prenatal diagnosis of Down syndrome through epigenetic markers and real-time qPCR
Patsalis, Philippos C.; Tsaliki, Evdokia; Koumbaris, George L.; Karagrigoriou, Alex; Velissariou, Voula; Papageorgiou, Elisavet A. (2012)Introduction: Non-invasive prenatal diagnosis (NIPD) of Down syndrome is rapidly evolving. Currently, two applications for NIPD of Down syndrome have been developed with potential and have displayed positive results
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Book Chapter
O promjenama distribucije financijskih obilježja na Cipru Å¡to govori anketa o financijama potroÅ¡aÄ a?
Karagrigoriou, Alex; Vonta, Filia (2006)
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Article
On distributional properties and goodness-of-fit tests for generalized measures of divergence
Karagrigoriou, Alex; Mattheou, K. (2010)The aim of this work is the investigation of a generalized family of measures of divergence which includes the well-known Csiszár's, Cressie and Read's, and the Basu-Harris-Hjort-Jones (Basu et al., 1998) measures. A weakly ...
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Article
On efficient AR spectral estimation for long-range predictions
Karagrigoriou, Alex; Vonta, Filia (2005)This article discusses the concept of asymptotic efficiency from the frequency domain point of view making use of the direct method for multiple prediction. In particular, it is shown that with the use of a new autoregressive ...
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Article
On Properties of the (Φ, a)-Power Divergence Family with Applications in Goodness of Fit Tests
Vonta, Filia; Mattheou, K.; Karagrigoriou, Alex (2012)In this paper we unify the different measures of divergence by introducing a general class of measures of divergence, the (Φ, a) -power divergence family and investigate its main properties including the limiting property, ...
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Conference Object
On semi-markov modelling and inference for multi-state systems
Barbu, Vlad Stefan; Karagrigoriou, Alex; Makrides, Andreas (Institute of Electrical and Electronics Engineers Inc., 2016)In this work we focus on multi state systems that we model by means of semi-Markov processes. The sojourn times are seen to be independent not identically distributed random variables and assumed to belong to a general ...
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Article
On the advantages of the non-concave penalized likelihood model selection method with minimum prediction errors in large-scale medical studies
Karagrigoriou, Alex; Koukouvinos, Christos; Mylona, Kalliopi (2010)Variable and model selection problems are fundamental to high-dimensional statistical modeling in diverse fields of sciences. Especially in health studies, many potential factors are usually introduced to determine an ...