scholarly journals On the relationship between C-C and C-D order parameters and its use for studying the conformation of lipid acyl chains in biomembranes

1998 ◽  
Vol 109 (6) ◽  
pp. 2513-2518 ◽  
Author(s):  
J.-P. Douliez ◽  
A. Ferrarini ◽  
E.-J. Dufourc
Keyword(s):  
Order Parameters ◽  
Acyl Chains ◽  
The Relationship

scholarly journals On the relationship between NMR-derived amide order parameters and protein backbone entropy changes

2015 ◽  
Vol 83 (5) ◽  
pp. 922-930 ◽  
Author(s):  
Kim A. Sharp ◽  
Evan O'Brien ◽  
Vignesh Kasinath ◽  
A. Joshua Wand
Keyword(s):  
Order Parameters ◽  
Protein Backbone ◽  
Entropy Changes ◽  
The Relationship

scholarly journals Acquisition of isotopic composition for surface snow in East Antarctica and the links to climatic parameters

2015 ◽  
Vol 9 (6) ◽  
pp. 6275-6313 ◽  
Author(s):  
A. Touzeau ◽  
A. Landais ◽  
B. Stenni ◽  
R. Uemura ◽  
K. Fukui ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Ice Cores ◽  
Order Parameters ◽  
Second Order ◽  
East Antarctica ◽  
Distillation Process ◽  
Past Climate ◽  
Climatic Signal ◽  
Surface Snow ◽  
The Relationship

Abstract. The isotopic composition of oxygen and hydrogen in ice cores are invaluable tools for the reconstruction of past climate variations. Used alone, they give insights into the variations of the local temperature, whereas taken together they can provide information on the climatic conditions at the point of origin of the moisture. However, recent analyses of snow from shallow pits indicate that the climatic signal can become erased in very low accumulation regions, due to local processes of snow reworking. The signal to noise ratio decreases and the climatic signal can then only be retrieved using stacks of several snow pits. Obviously, the signal is not completely lost at this stage, otherwise it would be impossible to extract valuable climate information from ice cores as has been done, for instance, for the last glaciation. To better understand how the climatic signal is passed from the precipitation to the snow, we present here results from varied snow samples from East Antarctica. First, we look at the relationship between isotopes and temperature from a geographical point of view, using results from three traverses across Antarctica, to see how the relationship is built up through the distillation process. We also take advantage of these measures to see how second order parameters (d-excess and 17O-excess) are related to δ18O and how they are controlled. d-excess increases in the interior of the continent (i.e. when δ18O decreases), due to the distillation process, whereas 17O-excess decreases in remote areas, due to kinetic fractionation at low temperature. In both cases, these changes are associated with the loss of original information regarding the source. Then, we look at the same relationships in precipitation samples collected over one year at Dome C and Vostok, as well as in surface snow at Dome C. We note that the slope of the δ18O / T relationship decreases in these samples compared to those from the traverses, and thus advocate caution when using spatial slopes for past climate reconstruction. The second-order parameters behave in the same way in the precipitation as in the surface snow from traverses, indicating that similar processes are active. Finally we check if the same relationships between δ18O and second-order parameters are also found in the snow from four snow pits. While the d-excess remains opposed to δ18O in most snow pits, the 17O-excess is no longer positively correlated to δ18O and even shows anti-correlation to δ18O at Vostok. This may be due to a stratospheric influence at this site and/or to post-deposition processes.

Profits Distribution within Main Manufacturer and Suppliers in Supply Chain Based on Synergetic Theory

2013 ◽  
Vol 647 ◽  
pp. 944-949 ◽  
Author(s):  
Hong Zhuan Chen ◽  
Hai Dong Hu ◽  
Zhen Yang
Keyword(s):  
Supply Chain ◽  
Order Parameter ◽  
Distribution Coefficients ◽  
Order Parameters ◽  
Distribution Model ◽  
Cooperation Mechanism ◽  
Practical Operation ◽  
Flow Through ◽  
Synergetic Theory ◽  
The Relationship

The paper discusses the main manufactures-suppliers mode cooperation mechanism based on synergetic theory, and it explicates the rule of interests flow through order parameter forming principle, and evaluated the synergetic degree of the system based on five key order parameters, then it designs an interest distribution model to explain the relationship among synergy degree and contribution coefficients and interest distribution coefficients, which made important meaning to guide the supply chain practical operation.

scholarly journals Mechanical analysis of heterogeneous materials with higher-order parameters

2021 ◽  
Author(s):  
Bozo Vazic ◽  
Bilen Emek Abali ◽  
Hua Yang ◽  
Pania Newell
Keyword(s):  
Mechanical Properties ◽  
Porous Materials ◽  
Higher Order ◽  
Order Parameters ◽  
Constitutive Law ◽  
Porous System ◽  
First Order ◽  
Bio Engineering ◽  
The Relationship ◽  
Effective Mechanical Properties

AbstractEven though heterogeneous porous materials are widely used in a variety of engineering and scientific fields, such as aerospace, energy-storage technology, and bio-engineering, the relationship between effective material properties of porous materials and their underlying morphology is still not fully understood. To contribute to this knowledge gap, this paper adopts a higher-order asymptotic homogenization method to numerically investigate the effect of complex micropore morphology on the effective mechanical properties of a porous system. Specifically, we use the second-order scheme that is an extension of the first-order computational homogenization framework, where a generalized continuum enables us to introduce length scale into the material constitutive law and capture both pore size and pore distribution. Through several numerical case studies with different combinations of porosity, pore shapes, and distributions, we systematically studied the relationship between the underlying morphology and effective mechanical properties. The results highlight the necessity of higher-order homogenization in understanding the mechanical properties and reveal that higher-order parameters are required to capture the role of realistic pore morphologies on effective mechanical properties. Furthermore, for specific pore shapes, higher-order parameters exhibit dominant influence over the first-order continuum.

scholarly journals Acquisition of isotopic composition for surface snow in East Antarctica and the links to climatic parameters

2016 ◽  
Vol 10 (2) ◽  
pp. 837-852 ◽  
Author(s):  
Alexandra Touzeau ◽  
Amaëlle Landais ◽  
Barbara Stenni ◽  
Ryu Uemura ◽  
Kotaro Fukui ◽  
...  
Keyword(s):  
Ice Cores ◽  
Order Parameters ◽  
Second Order ◽  
East Antarctica ◽  
Local Temperature ◽  
Distillation Process ◽  
Climatic Parameters ◽  
Climatic Signal ◽  
Surface Snow ◽  
The Relationship

Abstract. The isotopic compositions of oxygen and hydrogen in ice cores are invaluable tools for the reconstruction of past climate variations. Used alone, they give insights into the variations of the local temperature, whereas taken together they can provide information on the climatic conditions at the point of origin of the moisture. However, recent analyses of snow from shallow pits indicate that the climatic signal can become erased in very low accumulation regions, due to local processes of snow reworking. The signal-to-noise ratio decreases and the climatic signal can then only be retrieved using stacks of several snow pits. Obviously, the signal is not completely lost at this stage, otherwise it would be impossible to extract valuable climate information from ice cores as has been done, for instance, for the last glaciation. To better understand how the climatic signal is passed from the precipitation to the snow, we present here results from varied snow samples from East Antarctica. First, we look at the relationship between isotopes and temperature from a geographical point of view, using results from three traverses across Antarctica, to see how the relationship is built up through the distillation process. We also take advantage of these measures to see how second-order parameters (d-excess and 17O-excess) are related to δ18O and how they are controlled. d-excess increases in the interior of the continent (i.e., when δ18O decreases), due to the distillation process, whereas 17O-excess decreases in remote areas, due to kinetic fractionation at low temperature. In both cases, these changes are associated with the loss of original information regarding the source. Then, we look at the same relationships in precipitation samples collected over 1 year at Dome C and Vostok, as well as in surface snow at Dome C. We note that the slope of the δ18O vs. temperature (T) relationship decreases in these samples compared to those from the traverses, and thus caution is advocated when using spatial slopes for past climate reconstruction. The second-order parameters behave in the same way in the precipitation as in the surface snow from traverses, indicating that similar processes are active and that their interpretation in terms of source climatic parameters is strongly complicated by local temperature effects in East Antarctica. Finally we check if the same relationships between δ18O and second-order parameters are also found in the snow from four snow pits. While the d-excess remains opposed to δ18O in most snow pits, the 17O-excess is no longer positively correlated to δ18O and even shows anti-correlation to δ18O at Vostok. This may be due to a stratospheric influence at this site and/or to post-deposition processes.

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

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