Results 21 to 30 of about 1,238,948 (209)

Testing for causality-in-mean and in-variance among the U.S., China, and some Africa capital markets: A CCF approach

open access: yesJournal of Economics and Management, 2021
Aim/purpose – Owing to the huge risk occasioned by negative contagion effects associated with financial market linkages, markets participants and academia have continued to examine the capital market cross country interdependence at different levels.
Osabuohien-Irabor Osarumwense
doaj   +1 more source

Cross-correlation between COVID-19 confirmed cases and meteorological variables in SAARC countries.

open access: yes, 2022
Max. temperature: Maximum temperature; Max. W. speed: Maximum Wind speed; CCF: Cross-Correlation Function.
Md. Siddikur Rahman (12562998)   +1 more
core   +1 more source

Modified version of the cross-correlation function to measure drought occurrence time-delay correlation

open access: yesJournal of Water and Climate Change, 2023
According to the importance of assessing the presence of time delay between the occurrence of various hydrological and meteorological phenomena, the study aim is to introduce a new method (with high ability and non-sensitivity to the abnormality of ...
Mohammad Reza Mahmoudi   +1 more
doaj   +1 more source

HD 199719’un Çizgi Ortay Analizi

open access: yesSüleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2020
Bu çalışmada, TÜBİTAK Ulusal Gözlemevinde (TUG) devam etmekte olan ötegezegen araştırmasının bir parçası olarak HD 199719’un tayfsal çizgi ortaylarının (bisektör) değişimleri incelendi.
Didem Dilan İZCİ, Mesut YILMAZ
doaj   +1 more source

Time resolution of cosmic noise observations with a correlation experiment [PDF]

open access: yes, 2004
International audienceA radio wave correlation experiment using a Mills Cross technique can be used to observe the cosmic noise intensity from the ground for the purpose of determining the absorption in the ionosphere.
E. Nielsen   +5 more
core   +1 more source

Cross-correlation and maximum-likelihood analysis: a new approach to combining cross-correlation functions [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2003
6 pages, 7 figures, accepted for publication in ...
openaire   +2 more sources

On Niho type cross-correlation functions of m-sequences

open access: yesFinite Fields and Their Applications, 2007
The authors take a prime power \(q=p^k\) and a positive integer \(d\) of the form \(d\equiv 1\pmod {q-1}\) and study the number of solutions \(x\in \text{GF}(q^2)\) of the equation \((x+1)^d=x^d+1\). They prove various results concerning this number of the following flavor. Write \(d=(q-1)s+1\).
Tor Helleseth   +2 more
openaire   +2 more sources

Atmospheric stellar parameters from cross-correlation functions [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2017
The increasing number of spectra gathered by spectroscopic sky surveys and transiting exoplanet follow-up has pushed the community to develop automated tools for atmospheric stellar parameters determination. Here we present a novel approach that allows the measurement of temperature ($T_{\rm eff}$), metallicity ($[{\rm Fe}/{\rm H}]$) and gravity ($\log
Malavolta, L.   +4 more
openaire   +3 more sources

Point processes statistics of stable isotopes: analysing water uptake patterns in a mixed stand of Aleppo pine and Holm oak

open access: yesForest Systems, 2015
Aim of study: Understanding inter- and intra-specific competition for water is crucial in drought-prone environments. However, little is known about the spatial interdependencies for water uptake among individuals in mixed stands.
Carles Comas   +3 more
doaj   +1 more source

Evaluation of Cardiac function in COPD patients and correlation with disease severity: A cross sectional study

open access: yesAsian Journal of Medical Sciences, 2021
Background: Chronic obstructive pulmonary disease (COPD) has considerable effects on cardiac functions, including those of the right ventricle, left ventricle, and pulmonary blood vessels.
Subhadip Basak   +5 more
doaj   +1 more source

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