Results 91 to 100 of about 6,175 (306)

Modeling the relationship between climate oscillations and drought by a multivariate GARCH model. [PDF]

open access: yes, 2014
Typical multivariate time series models may exhibit comovement in mean but not in variance of hydrologic and climatic variables. This paper introduces multivariate generalized autoregressive conditional heteroscedasticity (GARCH) models to capture the ...
Ouarda, Taha B. M. J., Modarres, Reza
core   +1 more source

Advances in causal discovery methods for ecological time series

open access: yesBiological Reviews, EarlyView.
ABSTRACT Recent advances in data collection technologies (e.g. automated sensor networks, satellite remote sensing, and high‐throughput sequencing) have greatly expanded the availability of ecological time series, enabling new opportunities for causal analyses in dynamic ecosystems.
Kenta Suzuki   +6 more
wiley   +1 more source

Sufficient Conditions for the Oscillation of Linear Delay Difference Equations with Oscillating Coefficients

open access: yesJournal of Mathematical Analysis and Applications, 2000
The authors obtain sufficient conditions to assure that all the solutions to the equation \(x_{n+1}-x_n+p_n x_{n-k}=0\), \(n=0,1, 2, \ldots\) are oscillatory. They allow functions \(p_n\) to be nonoscillatory. The obtained results improve some previous results given for the case \(p_n \geq 0\) for \(n\) large enough.
Yu, J.S., Tang, X.H.
openaire   +2 more sources

Practicing Strategic Financial Sustainability in Small Cultural Non‐Profits: Evidence From London Museums

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT Small cultural museums play an important role in sustaining local heritage, community identity and inclusive cultural participation, yet they face persistent financial and organisational constraints. This study examines how financial sustainability is achieved and maintained in three small cultural museums through a qualitative‐led mixed ...
Joseph Gerald Bourke   +3 more
wiley   +1 more source

Enhanced Fear Memory in Adult Male C57BL/6 Mice Following Low‐Dose Isoflurane Exposure During Juvenile Development

open access: yesBrain and Behavior
Objective To elucidate the neural mechanisms through which neonatal exposure to low‐dose anesthetic isoflurane (ISO) enhances adult fear memory, specifically examining neural oscillations and activation patterns in the mediodorsal thalamus (MDL), dentate
Jing Sun   +9 more
doaj   +1 more source

Examination of oscillation frequency for combustion oscillation considering acoustic boundary conditions

open access: yesTransactions of the JSME (in Japanese), 2017
Hydrogen combustion is attracting attentions because of zero CO2 emission. Recently, a gas turbine which uses hydrogen-rich fuel is being developed. In our previous study, we examined the influence of hydrogen-containing ratio on combustion oscillation for fuel mixtures of hydrogen and town gas (13A) experimentally.
Akane UEMICHI   +2 more
openaire   +3 more sources

Stepwise nonparametric disaggregation for daily streamflow generation conditional on hydrologic and large-scale climatic signals [PDF]

open access: yes, 2010
Department Head: Luis A. Garcia.2010 Spring.Includes bibliographical references (pages 87-92).A stepwise nonparametric stochastic disaggregation framework to produce synthetic scenarios of daily streamflow conditional on volumes of spring runoff and ...
Kampf, Stephanie K., committee member   +4 more
core  

Asymptotic properties of cross‐classified sampling designs

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract We investigate the family of cross‐classified sampling designs across an arbitrary number of dimensions. We introduce a variance decomposition that enables the derivation of general asymptotic properties for these designs and the development of straightforward and asymptotically unbiased variance estimators.
Jean Rubin, Guillaume Chauvet
wiley   +1 more source

Actuarial Implication of Structural Changes in El Niño-Southern Oscillation Index Dynamics

open access: yes, 2011
[[abstract]]In this paper, we undertake a case study of El Niño-Southern Oscillation Index insurance for coastal Peru proposed by Skees. We examined the behavior of El Niño dynamics and found El Niño indices are changing over time. A class of generalized
Chen, Shu-Ling
core  

Non-linear coupling between the two oscillation modes of a dc-SQUID

open access: yes, 2011
5 pagesInternational audienceWe make a detailed theoretical description of the two-dimensional nature of a dc-SQUID, analyzing the coupling between its two orthogonal phase oscillation modes.
Milman, Pérola   +7 more
core   +1 more source

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