Results 21 to 30 of about 89,049 (160)

Improving the teaching of econometrics

open access: yesCogent Economics & Finance, 2016
We recommend a major shift in the Econometrics curriculum for both graduate and undergraduate teaching. It is essential to include a range of topics that are still rarely addressed in such teaching, but are now vital for understanding and conducting ...
David F. Hendry, Grayham E. Mizon
doaj   +1 more source

Method for Determination of Saturated Temperature with Automatic Plugging Indicator [PDF]

open access: yesJournal of Nuclear Science and Technology, 1979
Precipitation rates of sodium impurities on orifices of a plugging indicator and dissolution rates of precipitated impurities into sodium were studied to improve determination accuracy of the plugging and unplugging temperatures measured by the indicator.
YAMAMOTO, Hajime   +3 more
openaire   +1 more source

KARAKTERISASI RESERVOAR MELALUI ANALISIS PETROFISIKA BERDASARKAN DATA LOG SUMUR “TRD” FORMASI AIR BENAKAT

open access: yesJGE, 2020
The research area was located in South Sumatra Basin on Air Benakat Formation at South-East Jambi Province. The research conducted to know productive the interest zone by petrophysics analysis (volume shale water saturation, and porosity) and its ...
Beny Chasandra   +2 more
doaj   +1 more source

VERTICAL WELLS INDICATOR DIAGRAMS INTERPRETATION WITH TAKING INTO ACCOUNT THE COMBINED EFFECT OF FRACTURES CLOSUREAND GAS LIBERATION

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2015
A method is offered for vertical wells indicator diagrams interpretation considering the combined effect of fractures closure in the area of depression cone and gas liberation due to the pressure decline below the saturation pressure.
S. Yu. Yakimov
doaj   +1 more source

Ecological assessment of segetal flora activity’s change near Perm

open access: yesИзвестия высших учебных заведений. Поволжский регион: Естественные науки, 2022
Background. The research of segetal species’ activity reveals the processes taking place on agricultural land. The purpose of the study is a comparative, retrospective, environmental analysis of the activity of segetal species in Perm region South-West ...
S.V. Lihachev
doaj   +1 more source

Factors influencing oil saturation and exploration fairways in the lower cretaceous Quantou Formation tight sandstones, Southern Songliao Basin, China

open access: yesEnergy Exploration & Exploitation, 2018
Favorable exploration fairway prediction becomes crucial for efficient exploration and development of tight sandstone oil plays due to their relatively poor reservoir quality and strong heterogeneous oil saturation.
Kelai Xi   +3 more
doaj   +1 more source

Saturation magnetisation as an indicator of the disintegration of barium hexaferrite nanoplatelets during the surface functionalisation

open access: yesScientific Reports, 2023
Barium hexaferrite nanoplatelets (BHF NPLs) are permanent nanomagnets with the magnetic easy axis aligned perpendicular to their basal plane. By combining this specific property with optimised surface chemistry, novel functional materials were developed,
Darja Lisjak   +10 more
doaj   +1 more source

Relationships between stable isotope natural abundances (δ13C and δ15N) and water use efficiency in rice under alternate wetting and drying irrigation in soils with high clay contents

open access: yesFrontiers in Plant Science, 2022
Natural abundance of the stable isotope (δ13C and δ15N) in plants is widely used to indicate water use efficiency (WUE). However, soil water and texture properties may affect this relationship, which remains largely elusive.
Zhenchang Wang   +15 more
doaj   +1 more source

Predictive mapping of soil electrical conductivity as a Proxy of soil salinity in south-east of Algeria

open access: yesEnvironmental and Sustainability Indicators, 2020
In semi-arid and arid areas soil salinity has adverse effects both on the environment and agricultural production. The region of Biskra (South-East of Algeria) underwent a strong agricultural transformation from traditional oasis agriculture to an almost
Mohamed Amine Abdennour   +7 more
doaj   +1 more source

Outlier Detection in Structural Time Series Models: The Indicator Saturation Approach [PDF]

open access: yesSSRN Electronic Journal, 2014
Abstract Structural change affects the estimation of economic signals, such as the growth rate or the seasonally adjusted series. One important issue that has attracted a great deal of attention in the seasonal adjustment literature is its detection by an expert procedure.
Marczak, Martyna, Proietti, Tommaso
openaire   +7 more sources

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