Results 21 to 30 of about 1,231,611 (370)

Eight-year periodical outbreaks of the train millipede [PDF]

open access: yesRoyal Society Open Science, 2021
Periodical cicadas are the only confirmed periodical animals with long life cycles. In Japan, however, 8-year periodicity had been suggested in a species of train millipedes that had frequently obstructed trains in the central mountainous region of ...
Keiko Niijima   +2 more
doaj   +1 more source

A targeted extracellular approach for recording long-term firing patterns of excitable cells: a practical guide

open access: yesBiological Procedures Online, 2003
Excitable cells in many endocrine and neuronal systems display rhythms with periodicities on the order of many minutes. To observe firing patterns that represent the output of these rhythms requires a recording technique that can monitor ...
Nunemaker Craig S.   +2 more
doaj   +1 more source

A Primer for Microbiome Time-Series Analysis

open access: yesFrontiers in Genetics, 2020
Time-series can provide critical insights into the structure and function of microbial communities. The analysis of temporal data warrants statistical considerations, distinct from comparative microbiome studies, to address ecological questions.
Ashley R. Coenen   +5 more
doaj   +1 more source

Time-Varying Periodicity in Intraday Volatility

open access: yesJournal of the American Statistical Association, 2019
We develop a nonparametric test for whether return volatility exhibits time-varying intraday periodicity using a long time series of high-frequency data.
T. Andersen   +2 more
semanticscholar   +1 more source

Mining Calendar-based Periodic Patterns from Nonbinary Transactions

open access: yesJournal of Intelligent Systems, 2014
A large class of problems deals with temporal data. Identifying temporal patterns in these datasets is a natural as well as an important task. In recent times, researchers have reported an algorithm for finding calendar-based periodic pattern in time ...
Adhikari Jhimli
doaj   +1 more source

Abelian bordered factors and periodicity [PDF]

open access: yes, 2014
A finite word u is said to be bordered if u has a proper prefix which is also a suffix of u, and unbordered otherwise. Ehrenfeucht and Silberger proved that an infinite word is purely periodic if and only if it contains only finitely many unbordered ...
Charlier, Emilie   +3 more
core   +2 more sources

Prevalence And Self-Knowledge Of Indicators Of Inflammation Suggestive of Periodontal Disease In Military Personnel

open access: yesRevista Naval de Odontologia On Line, 2023
The objective of this study was to identify the prevalence and self-recognition for indicators of inflammation suggestive of periodontal disease in military personnel of both genders.
Ana Paula Porto Amorim Machado   +2 more
doaj   +1 more source

Back-electron transfer suppresses the periodic length dependence of DNA-mediated charge transport across adenine tracts [PDF]

open access: yes, 2008
DNA-mediated charge transport (CT) is exquisitely sensitive to the integrity of the bridging π-stack and is characterized by a shallow distance dependence. These properties are obscured by poor coupling between the donor/acceptor pair and the DNA bridge,
Augustyn, Katherine E.   +4 more
core   +2 more sources

TimesNet: Temporal 2D-Variation Modeling for General Time Series Analysis [PDF]

open access: yesInternational Conference on Learning Representations, 2022
Time series analysis is of immense importance in extensive applications, such as weather forecasting, anomaly detection, and action recognition. This paper focuses on temporal variation modeling, which is the common key problem of extensive analysis ...
Haixu Wu   +5 more
semanticscholar   +1 more source

Storing the Wisdom: Chemical Concepts and Chemoinformatics

open access: yesInformatics, 2015
The purpose of the paper is to examine the nature of chemical concepts, and the ways in which they are applied in chemoinformatics systems. An account of concepts in philosophy and in the information sciences leads to an analysis of chemical concepts ...
David Bawden
doaj   +1 more source

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