Results 141 to 150 of about 5,646,026 (251)
Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting
Journal of Time Series Analysis, EarlyView.ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss +2 more
wiley +1 more source
The Astrophysical JournalBipolar magnetic regions (BMRs) that appear on the solar photosphere are surface manifestations of the Sun’s internal magnetic field. With modern observations and continuous data streams, the study of BMRs has moved from manual sunspot catalogs to ...
Anu Sreedevi +4 more
doaj +1 more source
Atmosphere(1) Introduction: The subject of the present study concerns the analysis of the existence and long time evolution of the solar ~200 yr (de Vries/Suess) and ~2400 yr (Hallstadt) cycles during the recent part of the Wurm ice epoch and the Holocene, as well
Boris Komitov
doaj +1 more source
Duplicitous Remembrance: Confessing Self‐Deception with Augustine
Modern Theology, EarlyView.Abstract While self‐deception has long been a topic of interest in psychology and analytic philosophy—and increasingly in the academic study of theology and religion—direct engagement with Augustine on self‐deception remains underexplored in contemporary scholarship.
Abraham S‐C Wu
wiley +1 more source
The Astrophysical JournalWe explore what fraction of delta sunspots with a sharp polarity inversion line (PIL) in photospheric magnetograms are produced by a writhe kink in an emerging twisted flux rope.
Ronald L. Moore +4 more
doaj +1 more source
Long‐term stability of transcrestal sinus augmentation
Periodontology 2000, EarlyView.Abstract Transcrestal sinus augmentation has emerged as a minimally invasive alternative to lateral window techniques for vertical bone augmentation in the edentulous maxilla. Since its early introduction and modification over the last several decades, this technique has demonstrated predictable outcomes for implant placement in regions with limited ...
Sandra H. Stuhr +4 more
wiley +1 more source
Multilayer Perceptron Network Optimization for Chaotic Time Series Modeling. [PDF]
Entropy (Basel), 2023 Qiao M, Liang Y, Tavares A, Shi X.
europepmc +1 more source
Teacher Perspectives of Student Engagement in Data Practice Instruction: Two Classroom Conditions
School Science and Mathematics, EarlyView.ABSTRACT This study examines high school science teachers' perceptions of student engagement in data practices across two instructional contexts: a scaffolded, student‐centered environment using the Science Practices Innovation Notebook (SPIN) and a business‐as‐usual (BAU) teacher‐led investigation.
Erin Peters‐Burton +4 more
wiley +1 more source
The Power of Sunspots: An Experimental Analysis [PDF]
We present an experiment in which extrinsic information (signals) may generate sunspot equilibria. The underlying coordination game has a unique symmetric non-sunspot equilibrium, which is also risk-dominant.
Frank Heinemann +2 more
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