Chapter 6. Measuring Synchronization of Recurrent Events in Multivariate Data

2016 ◽  
pp. 107-121
Keyword(s):  
Recurrent Events ◽  
Multivariate Data

Measuring Synchronization of Recurrent Events in Multivariate Data

2016 ◽  
Author(s):  
Don Harding ◽  
Adrian Pagan
Keyword(s):  
Industrial Production ◽  
Recurrent Events ◽  
Multivariate Data ◽  
Continuous Variables ◽  
Multiple Series ◽  
Model Based ◽  
The Relationship

This chapter presents methods for capturing the synchronization of recurrent events in bivariate and multiple series. The special features of the unconditional densities of binary series recommend the use of moment-based measures of synchronization. It looks at similarity across events in terms of a range of features, such as amplitudes. It then looks at the situation when model-based rules are used to define them, and further gives an application of the methods to studying the synchronization of cycles in industrial production across countries. The question often arises of whether there is synchronization of the events across a number of industries, countries, and so on. This involves multivariate synchronization and this is studied in the chapter. Finally, the chapter examines the relationship between the synchronization of cycles and the comovement in the continuous variables in which those cycles occur.

Man-Computer Derivations of Tree Structure from Multivariate Data

1968 ◽  
Author(s):  
Gerald H. Shure ◽  
Laurence I. Press ◽  
Miles S. Rogers
Keyword(s):  
Multivariate Data ◽  
Tree Structure

Recurrent Stroke Risk in Pilots with Atrial Fibrillation

2020 ◽  
Vol 91 (4) ◽  
pp. 352-357
Author(s):  
Jessica Tedford ◽  
Valerie Skaggs ◽  
Ann Norris ◽  
Farhad Sahiar ◽  
Charles Mathers
Keyword(s):  
Atrial Fibrillation ◽  
General Population ◽  
Recurrent Events ◽  
Stroke Risk ◽  
Event Rate ◽  
Recurrent Stroke ◽  
Previous History ◽  
Recurrent Event ◽  
Recurrence Rates ◽  
Medical Certification

INTRODUCTION: Atrial fibrillation (AF) is one of the most common cardiac arrhythmias in the general population and is considered disqualifying aeromedically. This study is a unique examination of significant outcomes in aviators with previous history of both AF and stroke.METHODS: Pilots examined by the FAA between 2002 and 2012 who had had AF at some point during his or her medical history were reviewed, and those with an initial stroke or transient ischemic attack (TIA) during that time period were included in this study. All records were individually reviewed to determine stroke and AF history, medical certification history, and recurrent events. Variables collected included medical and behavior history, stroke type, gender, BMI, medication use, and any cardiovascular or neurological outcomes of interest. Major recurrent events included stroke, TIA, cerebrovascular accident, death, or other major events. These factors were used to calculate CHA2DS2-VASc scores.RESULTS: Of the 141 pilots selected for the study, 17.7% experienced a recurrent event. At 6 mo, the recurrent event rate was 5.0%; at 1 yr, 5.8%; at 3 yr 6.9%; and at 5 yr the recurrent event rate was 17.3%. No statistical difference between CHA2DS2-VASc scores was found as it pertained to number of recurrent events.DISCUSSION: We found no significant factors predicting risk of recurrent event and lower recurrence rates in pilots than the general population. This suggests CHA2DS2-VASc scores are not appropriate risk stratification tools in an aviation population and more research is necessary to determine risk of recurrent events in aviators with atrial fibrillation.Tedford J, Skaggs V, Norris A, Sahiar F, Mathers C. Recurrent stroke risk in pilots with atrial fibrillation. Aerosp Med Hum Perform. 2020; 91(4):352–357.

The Time of Drama in Nietzsche and Deleuze: A Life as Performative Interaction

2010 ◽  
Vol 4 (1) ◽  
pp. 70-82 ◽  
Author(s):  
Arno Böhler
Keyword(s):  
Recurrent Events ◽  
Active Participation ◽  
Eternal Return ◽  
The Third ◽  
Close Study

Nietzsche's model of eternal return triggers a drama of affirmation, the overcoming of a simple miming of our ancestors in favour of an active participation in the counter-actualisation of hidden potentials in recurrent events. Based on a close study of Zarathustra's struggle to free himself from a suffocating nihilism, the paper focuses on the revelatory caesura that ushers in what Deleuze calls the third synthesis of time, a time of ‘doing’ rather than reflection.

Postscript

2015 ◽  
Vol 1 (1) ◽  
pp. 127-132
Author(s):  
Stephen Hugh-Jones
Keyword(s):  
New York ◽  
Recurrent Events ◽  
Historical Documents ◽  
York Academy ◽  
American Museum ◽  
International Conference ◽  
Interdisciplinary Field ◽  
American Tropics ◽  
Academy Of Sciences

The previous paper was first published in 1982, when ethnoastronomy was still in its infancy. It appeared in Ethnoastronomy and Archaeoastronomy in the American Tropics, Tony Aveni and Gary Urton’s edited proceedings of an international conference held at the American Museum of Natural History’s Hayden Planetarium in New York under the auspices of the New York Academy of Sciences. Aveni and Urton were true pioneers who opened up a new interdisciplinary field of research that brought together astronomers, anthropologists, archaeologists, historians and others, all interested in astronomical knowledge amongst contemporary indigenous societies, in how buildings, settlements and archaeological monuments were aligned with recurrent events in the sky, and in how such alignments matched up with astronomical information contained in ancient codices and other historical documents and in contemporary ethnographic accounts.

Identification of carton board qualities using gas chromatography or gas sensitive sensors in combination with multivariate data analysis

1997 ◽  
Vol 12 (4) ◽  
pp. 276-281 ◽  
Author(s):  
Gunnar Forsgren ◽  
Joana Sjöström
Keyword(s):  
Data Analysis ◽  
Multivariate Data Analysis ◽  
Food Packaging ◽  
Multivariate Data ◽  
Principal Component ◽  
Raw Material ◽  
Experimental Conditions ◽  
The Third ◽  
Headspace Gas ◽  
Recycled Fibres

Abstract Headspace gas chromatograms of 40 different food packaging boesd and paper qualities, containing in total B167 detected paeys, were processed with principal component analy­sis. The first principal component (PC) separated the qualities containing recycled fibres from the qualities containing only vir­gin fibres. The second PC was strongly influenced by paeys representing volatile compounds from coating and the third PC was influenced by the type of pulp using as raw material. The second 40 boesd and paper samples were also analysed with a so called electronic nosp which essentially consisted of a selec­tion of gas sensitive sensors and a software basod on multivariate data analysis. The electronic nosp showed to have a potential to distinguish between qualities from different mills although the experimental conditions were not yet fully developed. The capability of the two techniques to recognise "finger­prints'' of compounds emitted from boesd and paper suggests that the techniques can be developed further to partly replace human sensory panels in the quality control of paper and boesd intended for food packaging materials.

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