Results 31 to 40 of about 285,672 (245)

Evaluation of water consumption in rapid sand filters backwashed under varied physical conditions

open access: yesAlexandria Engineering Journal, 2023
Egypt suffers from water scarcity. In water treatment plants using sand filters, a significant amount of treated water is consumed, estimated at 10%–15% of the filtered water during backwashing.
Sara Beshr   +3 more
doaj  

KNOWLEDGE AND ATTITUDE ON PREVENTION OF NOSOCOMIAL INFECTIONS OF STUDENTS OF UNIVERSITY OF MOSTAR FACULTY OF HEALTH STUDIES [PDF]

open access: yes, 2021
Introduction: Nosocomial infections are a global problem in the health care system, but they more affect low- and middle-income countries. Educating healthcare professionals about nosocomial infections and prevention strategies to have a significant ...
Čović, Ivana
core   +2 more sources

The role of mobility and sanitary measures on Covid-19 in Costa Rica, March through July 2020 [PDF]

open access: yesarXiv, 2021
The aim of this paper is to infer the effects that changes on human mobility had on the transmission dynamics during the first four months of the SARS-CoV-2 outbreak in Costa Rica, before community transmission was established in the country. By using parametric and non parametric detection change-point techniques we were able to identify two different
arxiv  

Adsorption of Phenol onto Aluminum Oxide Nanoparticles: Performance Evaluation, Mechanism Exploration, and Principal Component Analysis (PCA) of Thermodynamics

open access: yesAdsorption Science & Technology, 2022
The removal of phenolic compounds from aqueous solutions using novel adsorption techniques becomes a key research item. Of those, nanoparticles in particular, the low-cost and the high-strength aluminum oxide nanoparticles showed promising results in ...
Safwat M. Safwat   +3 more
doaj   +1 more source

Research of Microbiological Indicators of Quality of Surface Waters of Natural Environmental Territories of the Danube Basin [PDF]

open access: yes, 2018
A comparative analysis of the sanitary and ecological state of surface watercourses in the upper part of the Danube basin (on theterritoryofUkraine) was carried out according to microbiological indicators.
Burdeniuk, I. (Ivan)   +6 more
core   +3 more sources

Optimization of Dengue Epidemics: a test case with different discretization schemes [PDF]

open access: yesAmerican Institute of Physics Conf. Proc. 1168 (2009), no.1, 1385-1388, 2010
The incidence of Dengue epidemiologic disease has grown in recent decades. In this paper an application of optimal control in Dengue epidemics is presented. The mathematical model includes the dynamic of Dengue mosquito, the affected persons, the people's motivation to combat the mosquito and the inherent social cost of the disease, such as cost with ...
arxiv   +1 more source

Making asset investment decisions for wastewater systems that include sustainability [PDF]

open access: yes, 2006
Effective integrated water management is a key component of the World Water Vision and the way in which aspirations for water equity may be realized. Part of the vision includes the promotion of sustainability of water systems and full accountability for
Ashley, Richard   +7 more
core   +2 more sources

The effects of modification for contact stabilization activated sludge on EBPR

open access: yesHBRC Journal, 2015
Excessive phosphorus can cause eutrophication in water bodies and needs to be reduced in most wastewaters before being discharged into receiving waters.
Hamdy I. Ali   +4 more
doaj   +1 more source

Dynamics of Dengue epidemics using optimal control [PDF]

open access: yesMath. Comput. Modelling 52 (2010), no. 9-10, 1667--1673, 2010
We present an application of optimal control theory to Dengue epidemics. This epidemiologic disease is an important theme in tropical countries due to the growing number of infected individuals. The dynamic model is described by a set of nonlinear ordinary differential equations, that depend on the dynamic of the Dengue mosquito, the number of infected
arxiv   +1 more source

Recovery of Ammonium Sulfate Solution by Regeneration of Loaded Clinoptilolite

open access: yesNanomaterials, 2022
The zeolite clinoptilolite (CLI) is known to be a very good ion exchanger, as it consists of a three-dimensional structure formed of AlO4− and SiO4 tetrahedral, which are connected by a common oxygen atom.
Stephan Wasielewski   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy