PRECISE DETERMINATION OF BACKBONE STRUCTURE AND CONDUCTIVITY OF 3D PERCOLATION NETWORKS BY THE DIRECT ELECTRIFYING ALGORITHM

2009 ◽  
Vol 20 (03) ◽  
pp. 423-433 ◽  
Author(s):  
CHUNYU LI ◽  
TSU-WEI CHOU
Keyword(s):  
Efficient Algorithm ◽  
Precise Determination ◽  
Scaling Exponents ◽  
Resistor Network ◽  
Backbone Structure ◽  
Definition Of ◽  
First Time ◽  
Good Agreement

This paper confirms the applicability of a newly developed efficient algorithm, the direct electrifying method, for identifying backbone for 3D site and bond percolating networks. This algorithm is based on the current-carrying definition of backbone and carried out on the predetermined spanning cluster, which is assumed to be a resistor network. The scaling exponents so obtained for backbone mass, red bonds, and conductivity are in very good agreement with some existing results. The perfectly balanced bonds in 3D backbone structures are predicted first time to be 0.00179 ± 0.00009 and 0.00604 ± 0.00008 of the backbone mass for bond and site percolations, respectively.

scholarly journals The Cretaceous-Paleogene boundary in turbiditic deposits identified to the bed: a case study from the Skole Nappe (Outer Carpathians, southern Poland)

2011 ◽  
Vol 62 (4) ◽  
pp. 333-343 ◽  
Author(s):  
M. Gasiński ◽  
Alfred Uchman
Keyword(s):  
Precise Determination ◽  
Thrust Sheet ◽  
Southern Poland ◽  
The Carpathians ◽  
Early Paleocene ◽  
Outer Carpathians ◽  
First Time

The Cretaceous-Paleogene boundary in turbiditic deposits identified to the bed: a case study from the Skole Nappe (Outer Carpathians, southern Poland)The Cretaceous-Paleogene (K-T) boundary has been recognized in turbiditic sediments of the Ropianka Formation in the Skole Nappe (Bąkowiec section) on the basis of planktonic foraminiferids with an accuracy of 40 cm. Such precise determination of the K-T boundary for the first time in the Carpathians and in turbiditic flysch sediments in general was possible due to the successive occurrence of the Early Paleocene planktonic taxa of the P1 Zone above the latest MaastrichtianAbathomphalus mayaroensisZone with theRacemiguembelina fructicosaSubzone. The trends in composition of the latest Maastrichtian foraminiferal assemblages are similar to the Gaj section from the adjacent thrust sheet, probably due to the influence of the same paleoenvironmental factors.

Novel electrochemical fingerprinting methods for the precise determination of Ptshell coverage on Rucore nanoparticles

2014 ◽  
Vol 50 (78) ◽  
pp. 11558-11561 ◽  
Author(s):  
Ehab N. El Sawy ◽  
Hany A. El-Sayed ◽  
Viola I. Birss
Keyword(s):  
Precise Determination ◽  
Oxide Formation ◽  
Electronic Interactions ◽  
Co Stripping ◽  
Two Phases ◽  
First Time ◽  
Fingerprinting Methods ◽  
Core Nanoparticles

The electrochemical signatures of Ru oxide formation and CO stripping were used, for the first time, to determine the Pt shell coverage (from 0–2 monolayers) on Ru core nanoparticles, also revealing the chemical and electronic interactions that exist between these two phases.

scholarly journals II—On the Liassic Fish Osteorachis Macrocephalus

1895 ◽  
Vol 2 (5) ◽  
pp. 204-206
Author(s):  
Arthur Smith Woodward
Keyword(s):  
Single Species ◽  
Original Description ◽  
Precise Determination ◽  
Present Writer ◽  
Systematic Relationships ◽  
Definition Of

Among the fishes of the Lower Lias of Lyme Regis, Dorsetshire, described by Egerton from imperfect evidence, is the genus Osteorachis, with the single species, O. macrocephalus. The original description and figure are so unsatisfactory that nothing beyond the name of the fish is quoted even in Zittel's “Handbuch” (vol. iii, p. 230), while this bears an appended query; and the author's definition of the genus is certainly much too vague to admit of any precise determination of its systematic relationships. Under these circumstances it is of interest to return to a consideration of the fish in the light of more recently discovered specimens, which seem to the present writer to comprise not only examples of the trunk but also, at least, one satisfactory head.

Thermodynamics and Kinetics of Crystallization of Amorphous Si and Ge Produced by Ion Implantation

1983 ◽  
Vol 27 ◽  
Author(s):  
E.P. Donovan ◽  
F. Spaepen ◽  
D. Turnbull ◽  
J.M. Poate ◽  
D.C. Jacobson
Keyword(s):  
Noble Gas ◽  
Amorphous State ◽  
Heat Evolution ◽  
Precise Determination ◽  
Total Enthalpy ◽  
Kinetics Of Crystallization ◽  
Amorphous Si ◽  
Kinetics Of ◽  
Good Agreement

ABSTRACTAmorphous Si and Ge layers, produced by noble gas (Ar or Xe) implantation of single crystal substrates, have been crystallized in a differential scanning calorimeter (DSC). This technique allows determination of the growth velocity (which is proportional to the rate of heat evolution, ΔHac), and the total enthalpy of crystallization ΔHacAmorphous Ge was found to relax continuously to an amorphous state of lower free energy, with a total enthalpy of relaxation of 6.0 kJ.mole−1 before crystallization started. The regrowth velocity on (100) substrates,measured to be 4.2×1017 exp (−2.17eV/kT)Å/sec, is compared to other determinations. The value of ΔHac was found to be 11.66± 0.7 kJ.mole, in good agreement with ΔHac for amorphous Ge produced by other methods. For Si, ΔHac was determined to be 11.95± 0.7 kJ.mole without any evidence of heat release due to relaxation. The kinetics of crystallization measured by DSC are compared with those determined by other techniques. The effects of the implant profile on the regrowth velocity could also be observed directly in the DSC signal. The more accurate value of ΔHac allowed a more precise determination of the melting temperature of amorphous Si: Taℓ= 1420K.

scholarly journals Wartości i klasy społeczne

Etyka ◽  
1979 ◽  
Vol 17 ◽  
pp. 93-121
Author(s):  
Piotr Buczkowski ◽  
Leszek Nowak
Keyword(s):  
Historical Materialism ◽  
Precise Determination ◽  
Social Category ◽  
Social Categories ◽  
States Of Affairs ◽  
The Family ◽  
Secondary Classes ◽  
Definition Of

Marxist axiology presupposes the theory of historical materialism: this article is concerned with an adaptive interpretation of the latter. Its concern is reflected in the proposed definition of value: value is the family of classes of states of affairs identified by the relation of preference of an ideal social subject (who represents a certain social category). The article presents the hierarchy of social categories based on the adaptive interpretation of historical materialism: primary classes, secondary classes (comprising, so called, class fractions) strata, etc. In the course of argumentation the aforementioned definition of value becomes more and more realistic and permits ever more precise determination of values accepted in a society.

scholarly journals Confronting expansion distances of planetary nebulae with Gaia DR2 measurements

2019 ◽  
Vol 625 ◽  
pp. A137 ◽  
Author(s):  
D. Schönberner ◽  
M. Steffen
Keyword(s):  
Planetary Nebula ◽  
Planetary Nebulae ◽  
Precise Determination ◽  
Asymptotic Giant Branch ◽  
Correction Factors ◽  
Trigonometric Parallaxes ◽  
Formation And Evolution ◽  
Hydrodynamical Simulations ◽  
Good Agreement

Context. Individual distances to planetary nebulae are of the utmost relevance for our understanding of post-asymptotic giant-branch evolution because they allow a precise determination of stellar and nebular properties. Also, objects with individual distances serve as calibrators for the so-called statistical distances based on secondary nebular properties. Aims. With independently known distances, it is possible to check empirically our understanding of the formation and evolution of planetary nebulae as suggested by existing hydrodynamical simulations. Methods. We compared the expansion parallaxes that have recently been determined for a number of planetary nebulae with the trigonometric parallaxes provided by the Gaia Data Release 2. Results. Except for two out of 11 nebulae, we found good agreement between the expansion and the Gaia trigonometric parallaxes without any systematic trend with distance. Therefore, the Gaia measurements also prove that the correction factors necessary to convert proper motions of shocks into Doppler velocities cannot be ignored. Rather, the size of these correction factors and their evolution with time as predicted by 1D hydrodynamical models of planetary nebulae is basically validated. These correction factors are generally greater than unity and are different for the outer shell and the inner bright rim of a planetary nebula. The Gaia measurements also confirm earlier findings that spectroscopic methods often lead to an overestimation of the distance. They also show that even modelling of the entire system of star and nebula by means of sophisticated photoionisation modelling may not always provide reliable results. Conclusions. The Gaia measurements confirm the basic correctness of the present radiation-hydrodynamics models, which predict that both the shell and the rim of a planetary nebula are two independently expanding entities, created and driven by different physical processes, namely thermal pressure (shell) or wind interaction (rim), both of which vary differently with time.

Interaction entre les réactifs lanthanidiques et les bases de Lewis: Application à l'analyse conformationnelle d'alcools cyclohexaniques

1979 ◽  
Vol 57 (9) ◽  
pp. 1080-1088 ◽  
Author(s):  
James Bouquant ◽  
Alain Maujean ◽  
Josselin Chuche
Keyword(s):  
Conformational Equilibrium ◽  
Equilibrium Constants ◽  
Intrinsic Parameters ◽  
Tertiary Alcohols ◽  
Butyl Group ◽  
Tert Butyl Group ◽  
Physicochemical Methods ◽  
First Time ◽  
Good Agreement

A method for the determination of the intrinsic parameters K and Δ for lanthanide–substrate complexes has been extended to conformationally mobile molecules. These parameters, determined for a series of secondary cyclohexane alcohols (cyclohexanol and 2-methylcyclohexanol) and for tertiary alcohols (1-methylcyclohexanol and 1-ethylcyclohexanol) complexed with Eu(DPM)3 and Yb(DPM)3 lead to the determination of the conformational equilibrium constants between) the free species on one part and the complexed species on the other.The results obtained for the free species are in good agreement with those obtained by other physicochemical methods. For the complexed species an appreciable shift of conformational equilibrium is noted for low values of the association constants.For the first time, the tert-butyl group of Yb(DPM)3 has been used as a conformational probe. [Journal translation]

DETERMINATION OF ECONOMIC DAMAGE FROM DETERIORATION/DESTRUCTION OF ECOSYSTEM SERVICES

2018 ◽  
pp. 43-48
Author(s):  
Oksana Veklych
Keyword(s):  
Ecosystem Services ◽  
Cost Estimation ◽  
Economic Loss ◽  
Economic Damage ◽  
Structural Scheme ◽  
Definition Of ◽  
The Cost ◽  
First Time

The definition of economic damage from the deterioration/destruction of ecosystem services and analytical structuring of the economic loss from it were given for the first time. It was proposed and disclosed the logic-structural scheme that describes the algorithm of the sequence of actions and calculations for carrying out the cost estimation of damage from deterioration/destruction of ecosystem services in order to further substantiate the recommendations for additional filling of local budgets and attraction of targeted investments for implementation of projects aimed at conservation and restoration ecosystems.

scholarly journals Differential impedance spectra analysis reveals optimal actuation frequency in bulk mode acoustophoresis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Valentina Vitali ◽  
Giulia Core ◽  
Fabio Garofalo ◽  
Thomas Laurell ◽  
Andreas Lenshof
Keyword(s):  
Precise Determination ◽  
Impedance Spectra ◽  
Actuation Frequency ◽  
Spectra Analysis ◽  
Resonance Modes ◽  
Bulk Mode ◽  
Working Frequency ◽  
First Time ◽  
Channel Resonance

AbstractThis work reports a method to select the optimal working frequency in transversal bulk resonator acoustophoretic devices by electrical impedance measurements. The impedance spectra of acoustophoretic devices are rich in spurious resonance peaks originating from different resonance modes in the system not directly related to the channel resonance, why direct measurement of the piezoelectric transducer impedance spectra is not a viable strategy. This work presents, for the first time, that the resonance modes of microchip integrated acoustophoresis channels can be identified by sequentially measuring the impedance spectra of the acoustophoretic device when the channel is filled with two different fluids and subsequently calculate the Normalized Differential Spectrum (NDS). Seven transversal bulk resonator acoustophoretic devices of different materials and designs were tested with successful results. The developed method enables a rapid, reproducible and precise determination of the optimal working frequency.

scholarly journals Determination of the coefficient of inter-diffusion of gases and the velocity of ions under an electric force, in terms of mean free paths

1912 ◽  
Vol 86 (586) ◽  
pp. 197-206 ◽  
Keyword(s):  
Free Path ◽  
Equations Of Motion ◽  
Mean Free Path ◽  
Electric Force ◽  
Mean Velocity ◽  
The Mean ◽  
Definition Of ◽  
Good Agreement ◽  
Diffusion Of Gases

1. The properties of gases which depend on the velocity of agitation of molecules and the lengths of their free paths may easily be expressed in terms of the mean velocity of agitation and the mean free path when certain assumptions are made in order to simplify the investigations. The expressions thus found on the principles of the kinetic theory are in good agreement with the experimental results in most cases, but the formulæ that have been obtained for the coefficient of inter-diffusion of gases and the velocity of particles acted on by an external force are not so satisfactory. The equations of motion of two inter-diffusing gases have been given by Maxwell, and it may be shown from these that the exact value of the ratio of the coefficient of diffusion of ions to the velocity under unit electric force is N e /II, where N is the number of molecules per cubic centimetre of a gas at pressure II, and e the charge on an ion. The method adopted by Maxwell is perfectly general, there are no assumptions made as to the distribution of the velocities of agitation, and no particular definition of a collision of a free path is involved, so that there can be little doubt as to the accuracy of the result.

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