scholarly journals STUDIES ON THE PERMEABILITY OF MEMBRANES

1927 ◽  
Vol 10 (5) ◽  
pp. 685-701 ◽  
Author(s):  
L. Michaelis ◽  
A. A. Weech ◽  
A. Yamatori
Keyword(s):  
Satisfactory Agreement ◽  
Experimental Results ◽  
Transfer Number ◽  
Additional Argument ◽  
Anions And Cations ◽  
Transfer Numbers

The transfer numbers of the ions of electrolytes in the dried collodion membrane, as determined in a previous paper indirectly from the E.M.F. of concentration chains, can also be determined directly by electrical transfer experiments. It is shown that the difficulties involved in such experiments can be overcome. The transfer numbers obtained by the two methods are in satisfactory agreement. The experimental results obtained in the transfer experiments furnish an additional argument in favor of maintaining the theory that the electromotive effects observed in varying concentrations of different electrolytes with the dried collodion membrane may be referred to differences in the mobilities of the anions and cations within the membrane. As was shown by the method of the previous paper, the transfer number depends largely on concentration. There are some minor discrepancies between the values of the transfer numbers obtained by the two methods which, as yet, cannot be completely explained.

Interpretation of the isotope shifts in the arc spectrum of xenon

1975 ◽  
Vol 343 (1635) ◽  
pp. 443-451 ◽  
Keyword(s):  
Ab Initio ◽  
Satisfactory Agreement ◽  
Parametric Study ◽  
Experimental Results ◽  
Isotope Shifts ◽  
Hartree Fock ◽  
Field Effects ◽  
Experimental Values

From the experimental results of Jackson & Coulombe (1974) and Vetter (1970) in the arc spectrum of xenon, the isotope shifts of 30 levels in the low configurations 5p56s, 5p56p, 5p55d and 5p57p are obtained, for the mass numbers 136, 134, 132, 130 and 128. A parametric study of these shifts for each isotope is made, with 3 parameters for the even levels and 6 for the odd levels. Following the conclusions of Jackson & Coulombe (1974), the respective contributions of mass- and field-effects to the shifts of the levels and to the parameters are evaluated from King diagrams. The ab initio values obtained for the parameters through the Hartree-Fock nonrelativistic and relativistic methods show a satisfactory agreement with the experimental values.

Boron and antimony codiffusion in silicon

1991 ◽  
Vol 6 (11) ◽  
pp. 2353-2361 ◽  
Author(s):  
B. Margesin ◽  
R. Canteri ◽  
S. Solmi ◽  
A. Armigliato ◽  
F. Baruffaldi
Keyword(s):  
Diffusion Model ◽  
Satisfactory Agreement ◽  
Solid Solubility ◽  
Experimental Results ◽  
Simulation Program ◽  
High Concentration ◽  
Donor Acceptor

The codiffusion of B and Sb implanted in Si with a dose of 2 × 1016 cm−2, corresponding to concentration far above the solid solubility, is investigated at 900 and 1000 °C on the basis of SIMS and carrier profile measurements and TEM observations. The comparison of the codiffusion data with the corresponding ones obtained by the diffusion of each element alone revealed several anomalous effects due to dopant interaction. In particular, our experimental results support the hypothesis of the formation of mobile donor-acceptor pairs and of the increase of the Sb solubility in the region where a high concentration of acceptors is present. On the basis of this feature, a diffusion model that takes pairing and precipitation into account is presented. A simulation program including this model allows us to foresee most of the anomalous phenomena occurring in the high concentration codiffusion experiments and shows in general a satisfactory agreement with experimental profiles.

Analytical Modeling of Chatter Stability in Turning and Boring Operations—Part II: Experimental Verification

2007 ◽  
Vol 129 (4) ◽  
pp. 733-739 ◽  
Author(s):  
Emre Ozlu ◽  
Erhan Budak
Keyword(s):  
Satisfactory Agreement ◽  
Experimental Verification ◽  
Analytical Modeling ◽  
Stability Limit ◽  
Experimental Results ◽  
Chatter Stability ◽  
Nose Radius ◽  
The Stability ◽  
Flexible Component ◽  
Cutting System

In this part of the paper series, chatter experiments are conducted in order to verify the proposed stability models presented in the first part (Ozlu, E., and Budak, E., 2007, ASME J. Manuf. Sci. Eng., 129(4), pp. 726–732). Turning and boring chatter experiments are conducted for the cases where the tool or the workpiece is the most flexible component of the cutting system. In addition, chatter experiments demonstrating the effect of the insert nose radius on the stability limit are presented. Satisfactory agreement is observed between the analytical predictions and the experimental results.

scholarly journals Removal of Cr(III) ions from salt solution by nanofiltration: experimental and modelling analysis

2016 ◽  
Vol 18 (3) ◽  
pp. 10-16 ◽  
Author(s):  
Anna Kowalik-Klimczak ◽  
Mariusz Zalewski ◽  
Paweł Gierycz
Keyword(s):  
Dielectric Constant ◽  
Satisfactory Agreement ◽  
Salt Solution ◽  
Planck Equation ◽  
Low Ph ◽  
Experimental Results ◽  
Tannery Wastewater ◽  
Modelling Analysis ◽  
Modelling Data ◽  
Dsp Model

Abstract The aim of this study was experimental and modelling analysis of the nanofiltration process used for the removal of chromium(III) ions from salt solution characterized by low pH. The experimental results were interpreted with Donnan and Steric Partitioning Pore (DSP) model based on the extended Nernst-Planck equation. In this model, one of the main parameters, describing retention of ions by the membrane, is pore dielectric constant. In this work, it was identified for various process pressures and feed compositions. The obtained results showed the satisfactory agreement between the experimental and modelling data. It means that the DSP model may be helpful for the monitoring of nanofiltration process applied for treatment of chromium tannery wastewater.

Pressure Drop and Apparent Solids Concentration inside a Novel Multi-Regime Riser

2013 ◽  
Vol 709 ◽  
pp. 309-312
Author(s):  
Xiao Lin Zhu ◽  
Guo Wei Wang ◽  
Qiang Geng ◽  
Chun Yi Li ◽  
Chao He Yang
Keyword(s):  
Pressure Drop ◽  
Satisfactory Agreement ◽  
Total Pressure ◽  
Operating Conditions ◽  
Experimental Results ◽  
Circulation Rate ◽  
Empirical Correlations ◽  
Solids Concentration ◽  
Solids Circulation Rate ◽  
Measured Pressure

In this study, pressure drop across a novel CFB riser integrated with an enlarged bottom section was investigated under various operating conditions. Experimental results indicated that total pressure drop was much higher across the riser with larger diameter-enlarged section dimensions, consequently, resulting in lower solids circulation rate realizable in the riser. Based on the measured pressure drop across this novel riser, apparent solids concentrations of the diameter-enlarged section and the conveying section were obtained. Furthermore, empirical correlations for estimating overall average solids concentration in these two sections were established, respectively. And a satisfactory agreement between predictions and experimental results was observed.

scholarly journals K-joints of double-chord square hollow sections

1980 ◽  
Vol 7 (3) ◽  
pp. 523-539 ◽  
Author(s):  
Robert M. Korol ◽  
Magdi A. Chidiac
Keyword(s):  
Satisfactory Agreement ◽  
Experimental Results ◽  
Standard Type ◽  
Bolted Connection ◽  
Strength And Stiffness ◽  
Standard Channel ◽  
Channel Type

A new concept utilizing double-chord square hollow sections in welded K-joints of Warren trusses is described. The experimental results of 29 tests are reported, including four connection types: standard, channel, bolted, and back-to-back. The latter type comprised gapped, overlapped, and gapped with connecting stiffener plates.The results indicate that the standard type is an excellent joint in both strength and stiffness. The channel type is generally susceptible to twisting. It was found adequate only when a significant increase in chord thickness[Formula: see text] was employed. The bolted connection appears to hold promise when on-site assembly of large trusses is necessary. Its performance was further improved by connecting the chords with small tie bars. The back-to-back type needed to be reinforced or fully overlapped to develop full branch member strength. The double-chord system of connection reveals itself to be much superior in strength to an equivalent single-chord joint.The effects of eccentricity, branch member chord angle, and chord preloading were investigated. Interaction formulae are presented for the standard- and channel-type joints and their use is illustrated with examples. Satisfactory agreement between predicted and experimental ultimate strengths was obtained for joints that suffered from a chord failure at the connection.

Flow in a Gas-Operated Rifle

1972 ◽  
Vol 39 (1) ◽  
pp. 1-6 ◽  
Author(s):  
J. H. Spurk
Keyword(s):  
Satisfactory Agreement ◽  
Perturbation Analysis ◽  
Gas Flow ◽  
Early Time ◽  
Experimental Results ◽  
Steady Solution ◽  
Actuation System ◽  
Valid Solution ◽  
Unsteady Gas Flow

The unsteady gas flow in the actuation system of a gas-operated rifle is treated by perturbation analysis. A uniformly valid solution in time is found by matching the solution for early time with a quasi-steady solution. The predictions of the perturbation analysis are compared with experimental results from two rifles and satisfactory agreement is noted.

scholarly journals Влияние скин-эффекта и активных потерь на интенсивность линий ЭПР в полупроводящих веществах

2020 ◽  
Vol 62 (2) ◽  
pp. 241
Author(s):  
А.М. Зюзин ◽  
А.А. Карпеев ◽  
Н.В. Янцен
Keyword(s):  
Absorption Line ◽  
Satisfactory Agreement ◽  
Line Intensity ◽  
Unit Volume ◽  
Skin Effect ◽  
Sample Volume ◽  
Experimental Results ◽  
Test Substance ◽  
Wide Range ◽  
Absorption Line Intensity

The influence of the skin effect and active losses in samples of a semiconducting composite with a wide range of conductivity values on the intensity of the EPR absorption line was studied. An approach is proposed that makes it possible to obtain a satisfactory agreement between the calculated and experimental results. It is shown that, depending on the conductivity of the test substance, absorption line intensity, corresponding to a unit volume, can decrease significantly with increasing sample volume.

Контроль одноосных напряжений в сталях с учетом их магнитоупругой чувствительности

2021 ◽  
pp. 42-50
Author(s):  
В.Ф. Новиков ◽  
С.М. Кулак ◽  
А.С. Парахин
Keyword(s):  
Compressive Stress ◽  
Satisfactory Agreement ◽  
Linear Approximation ◽  
The State ◽  
Regression Equation ◽  
Experimental Results ◽  
Transverse Compression ◽  
Magnetoelastic Demagnetization ◽  
Steel Grades

The magnetoelastic demagnetization of a number of steels in the state of delivery under longitudinal elastic tension, transverse compression and impact has been investigated. The estimation of the magnetoelastic sensitivity of the studied steel grades in the linear approximation is given. The possibility of determining the tensile and compressive stress in the mode of magnetoelastic memory is considered, taking into account the magnetoelastic sensitivity of the selected section of steel, and a method for its determination using dosed loading (impact or compression) is proposed. It is shown that the regression equation in the form of a polynomial is in satisfactory agreement with the experimental results.

Transfer number in fine bubble diffused aeration systems

2001 ◽  
Vol 43 (11) ◽  
pp. 145-152 ◽  
Author(s):  
S. Capela ◽  
M. Roustan ◽  
A. Héduit
Keyword(s):  
Oxygen Transfer ◽  
Full Scale ◽  
Clean Water ◽  
Transfer Number ◽  
Efficiency Criterion ◽  
Liquid Circulation ◽  
Fine Bubble ◽  
Nonsteady State ◽  
The Impact ◽  
Transfer Numbers

On the basis of full-scale data from 58 clean water tests performed in 26 activated sludge tanks equipped with fine bubble diffusers and of a theoretical approach, it can be stated that fine bubble aeration systems with total floor coverage arrangement provide higher kLa values and the lowest spiral liquid circulation. An efficiency criterion for oxygen transfer ( NT) was defined on the basis of the dimensional analysis. The transfer number NT allows us to take account of the impact of vertical liquid circulation movements on oxygen transfer. The values of NT calculated from the results of full scale nonsteady-state clean water tests vary from 5.3×10-5 to 9.1×10-5 and are directly dependent upon the arrangement of air diffusers. It has been shown that the highest transfer numbers corresponded to the total floor coverage arrangement and the average calculated NT values is 7.7×10-5, independently of the diffuser density and of the gas velocity, over the ranges studied. The lowest transfer numbers are obtained when the diffusers are located in separate grids, and the transfer number is reduced with increasing air flow rate.

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