Results 61 to 70 of about 681,344 (199)

A semi-empirical representation of the temporal variation of total greenhouse gas levels expressed as equivalent levels of carbon dioxide [PDF]

open access: yes, 2009
and PDF report are also available on the MIT Joint Program on the Science and Policy of Global Change website (http://globalchange.mit.edu/).In order to examine the underlying longer-term trends in greenhouse gases, that are driven for example by ...
Cunnold, Derek   +3 more
core   +1 more source

Phase transitions in filtration of Redlich-Kwong gases

open access: yes, 2019
In this paper we study a 3-dimensional filtration of real gases described by Redlich-Kwong equations of state. Thermodynamical states are considered as Legendrian (Lagrangian) submanifolds in contact (symplectic) space.
Lychagin, Valentin, Roop, Mikhail
core   +1 more source

Parity-time symmetry with coherent atomic gases

open access: yesAdvances in Physics: X, 2017
In standard quantum theory, the Hamiltonian describing a physical system is assumed to be Hermitian in order to guarantee the energy spectrum to be real and the time evolution to be unitary.
Chao Hang, Guoxiang Huang
doaj   +1 more source

Соответствие методики государственных испытаний трехкомпонентных нейтрализаторов выхлопных газов реальным условиям эксплуатации

open access: yesВестник СибАДИ, 2017
In this article reviewed design features and conditions for effective operation of the three-way catalytic converters of exhaust gases, installed on automobile with gasoline internal combustion engines.
Nicolay Gavrilovich Pevnev   +1 more
doaj  

A Semantic-Based Gas Source Localization with a Mobile Robot Combining Vision and Chemical Sensing

open access: yesSensors, 2018
This paper addresses the localization of a gas emission source within a real-world human environment with a mobile robot. Our approach is based on an efficient and coherent system that fuses different sensor modalities (i.e., vision and chemical sensing)
Javier Monroy   +5 more
doaj   +1 more source

Operational experience in the Langley expansion tube with various test gases [PDF]

open access: yes
The Langley Expansion Tube is an operational facility capable of producing good quality, highly repeatable, quasi-steady flow for test times sufficient to establish flow about blunt axisymmetric and two-dimensional models.
Miller, C. G.
core   +1 more source

First measurements of the index of refraction of gases for lithium atomic waves

open access: yes, 2007
We report here the first measurements of the index of refraction of gases for lithium waves. Using an atom interferometer, we have measured the real and imaginary part of the index of refraction $n$ for argon, krypton and xenon, as a function of the gas ...
E. Audouard   +7 more
core   +3 more sources

Investigation towards nanomechanical sensor array for real-time detection of complex gases

open access: yesMicrosystems & Nanoengineering
This study presents the development and characterization of a nanomechanical gas sensor array with piezoresistive detectors for a wide range of applications.
Md. Abdul Momin   +6 more
doaj   +1 more source

Mollier-I, S-Diagrams for Combustion Gases in Data Processing [PDF]

open access: yes
In order to have all the thermal and caloric states of combustion gases accessible in a computer, closed mathematical approximation equations were established for the real factors, the enthalpy and the entropy of a real combustion gas.
Zacharias, F.
core   +1 more source

Near-Infrared Spectral MEMS Gas Sensor for Multi-Component Food Gas Detection

open access: yesMicromachines
The complex application environments of gas detection, such as in industrial process monitoring and control, atmospheric and environmental monitoring, and food safety, require real-time and online high-sensitivity gas detection, as well as the accurate ...
Xiaojian Yan   +9 more
doaj   +1 more source

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