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GIS-BASED ASSESSMENT OF GROUND WATER QUALITY FOR DRINKING PURPOSE BY WATER QUALITY INDEX APPROACHES IN BAHAWALPUR, PUNJAB [PDF]

open access: yesScience Heritage Journal, 2023
Groundwater pollution is a significant environmental issue globally, particularly in large cities, and trace heavy metals are the most significant groundwater pollutants. Pakistan is particularly affected by groundwater contamination, which poses a major
Ali Hassan   +5 more
doaj   +1 more source

Calculation model for strain of buried pipeline under the action of continuous surface displacement

open access: yesYou-qi chuyun, 2021
The long-distance oil & gas pipelines run through areas with various complicated geological conditions and often face the threats of geological hazards.
Ning GAO   +5 more
doaj   +1 more source

Ethnomathematics: Modelling the volume of solid of revolution at Buginese and Makassarese traditional foods

open access: yesJournal of Research and Advances in Mathematics Education, 2021
Ethnomathematics can empirically improve the cognitive abilities of students in elementary and secondary schools. However, in undergraduate study, there are still limited studies on integrating ethnomathematics in learning resources.
Zulfiqar Busrah, Hikmawati Pathuddin
doaj   +1 more source

Spatial distribution of bat activity in agricultural fields: implications for ecosystem service estimates

open access: yesEcology and Society, 2022
Bats provide a number of ecosystem services in agricultural areas, including the predation of night-flying insects, for which they are estimated to save agricultural industries billions of dollars per year. Intensive agriculture has many negative effects
Christopher T. Fill   +3 more
doaj   +1 more source

An extension of the classical John-Nirenberg inequality of martingales

open access: yesAIMS Mathematics, 2023
In this paper, we prove the John-Nirenberg theorem of the $ bmo_p $ martingale spaces for the full range $ 0 < p < \infty $.
Changzheng Yao, Congbian Ma
doaj   +1 more source

Comparison of mapping efficiency for small datasets using inverse distance weighting vs. moving average, Northern Croatia Miocene hydrocarbon reservoir

open access: yesGeologija, 2022
Mapping of geological variables in the Croatian part of the Pannonian Basin System (CPBS) is mostly based on small input datasets. In the case of the analyzed hydrocarbon field "B", reservoir "K", due to the complex geological structure and pronounced ...
Josip Ivšinović, Tomislav Malvić
doaj   +1 more source

Analysis of the spatial distribution of the drought in the Lim valley and on the upper course of the river Ibar in Montenegro [PDF]

open access: yesZbornik Radova: Geografski Fakultet Univerziteta u Beogradu, 2021
This paper analyzed the spatial distribution of drought at meteorological stations on the Lim valley (Plav, Andrijevica, Berane and Bijelo Polje) and on the upper course of the river Ibar (Rožaje).
Brđanin Eldin, Sedlak Marko
doaj   +1 more source

An Improvement of Security Scheme for Radio Environment Map Under Massive Attacking

open access: yesIEEE Access, 2022
Radio environment maps (REM) are widely used to enhance communication efficiency in spatial spectrum sharing. This can be generated using reports from the terminals.
Ying Gao, Takeo Fujii
doaj   +1 more source

On Quantization Errors in Approximate and Sample Entropy

open access: yesEntropy, 2021
Approximate and sample entropies are acclaimed tools for quantifying the regularity and unpredictability of time series. This paper analyses the causes of their inconsistencies.
Dragana Bajić, Nina Japundžić-Žigon
doaj   +1 more source

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