Results 31 to 40 of about 4,047,389 (301)

Improving the yield of freshwater and exergy analysis of conventional solar still with different nanofluids [PDF]

open access: yesFME Transactions, 2017
This experimental work intensively studies the effect of nanoparticle concentration and exergy of a conventional solar still. Experimental studies were conducted with concentration ranging from 0.05 to 0.2% with Al2O3, CuO and TiO2 on conventional solar ...
Madhu B.   +4 more
doaj  

Distribution of Impurities Concentration in Nucleate Boiling [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2008
The development of the mathematical model of mass transfer and diffusion process can determine the behavior of dissolved impurities in the flow boiling within viscous sublayer.
G.R Jahanfarnia
doaj  

Oxygen control and improved denitrification efficiency by means of a post-anoxic reactor [PDF]

open access: yes, 2015
The presence of dissolved oxygen (DO) in biological denitrification reactors determines inhibition effects on the denitrification rate. The article shows the results of an experimental study to control the DO concentration in the pre-denitrification ...
Gavasci, Renato   +2 more
core   +2 more sources

Research on Analysis Method of Remote Sensing Results of NO Emission from Diesel Vehicles

open access: yesAtmosphere, 2022
Remote sensing technology has been used for gasoline vehicle gaseous emissions monitoring for nearly 30 years. However, the application effect of the remote sensing detection of diesel vehicle tailpipe emission concentrations is unsatisfactory. Therefore,
Lijun Hao   +7 more
doaj   +1 more source

Initiation of HIV therapy [PDF]

open access: yes, 2010
In this paper, we numerically show that the dynamics of the HIV system is sensitive to both the initial condition and the system parameters. These phenomena imply that the system is chaotic and exhibits a bifurcation behavior.
BINGO WING-KUEN LING   +2 more
core   +1 more source

Using The Low Concentrated Photovoltaic Module As A Preheater In An Organic Rankine Cycle

open access: yesHittite Journal of Science and Engineering, 2020
I n concentrated photovoltaic thermal CPVT systems, sunlight is directly converted into electricity and during this conversion waste heat is generated on the photovoltaic module. The resulting waste heat can be used for heating the fluids.
Burak Kursun
doaj   +1 more source

Ultra-trace Cu isotope ratio measurements via multi-collector ICP-mass spectrometry using Ga as internal standard : an approach applicable to micro-samples [PDF]

open access: yes, 2018
The capabilities of Cu isotope ratio measurements are often restricted by the small volumes of sample available and/or their low Cu concentration. In this work, an analytical approach was developed for performing Cu isotopic analysis via multi-collector ...
Costas Rodriguez, Marta   +2 more
core   +1 more source

A combination of transcriptional and microRNA regulation improves the stability of the relative concentrations of target genes [PDF]

open access: yes, 2013
It is well known that, under suitable conditions, microRNAs are able to fine tune the relative concentration of their targets to any desired value. We show that this function is particularly effective when one of the targets is a Transcription Factor (TF)
Baroudi, Mariama El   +4 more
core   +6 more sources

DYNAMICS OF MUTUAL TRADE BETWEEN UKRAINE AND THE RUSSIAN FEDERATION IN THE CONTEXT OF CONFLICT’S IMPACT ON NATIONAL SECURITY: A CONCENTRATION-BASED APPROACH

open access: yesGreen, Blue and Digital Economy Journal, 2020
The purpose of the is to summarize and present the results of the study of economic prerequisites for the situation when trade between the aggressor (the Russian Federation) and the victim (Ukraine) was not stopped despite the conflict as well as to ...
Olga Oleshko
doaj   +1 more source

Concentration inequalities and asymptotic results for ratio type empirical processes

open access: yes, 2006
Let $\mathcal{F}$ be a class of measurable functions on a measurable space $(S,\mathcal{S})$ with values in $[0,1]$ and let \[P_n=n^{-1}\sum_{i=1}^n\delta_{X_i}\] be the empirical measure based on an i.i.d.
Giné, Evarist, Koltchinskii, Vladimir
core   +2 more sources

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