Field Theoretical Analysis of Driving Forces for the Uptake of Proteins by Like-Charged Polyelectrolyte Brushes: Effects of Charge Regulation and Patchiness

Langmuir ◽  
2010 ◽  
Vol 26 (1) ◽  
pp. 249-259 ◽  
Author(s):  
Wiebe M. de Vos ◽  
Frans A. M. Leermakers ◽  
Arie de Keizer ◽  
Martien A. Cohen Stuart ◽  
J. Mieke Kleijn
Keyword(s):  
Theoretical Analysis ◽  
Driving Forces ◽  
Charge Regulation ◽  
Polyelectrolyte Brushes

Charge regulation in polyelectrolyte brushes studied by FTIR spectroscopy

2000 ◽  
Vol 169 (1-3) ◽  
pp. 351-356 ◽  
Author(s):  
Takashi Abe ◽  
Shujiro Hayashi ◽  
Nobuyuki Higashi ◽  
Masazo Niwa ◽  
Kazue Kurihara
Keyword(s):  
Ftir Spectroscopy ◽  
Charge Regulation ◽  
Polyelectrolyte Brushes

A Theoretical Analysis of Timber Drying in Oscillating Climates

Holzforschung ◽  
2003 ◽  
Vol 57 (4) ◽  
pp. 427-432 ◽  
Author(s):  
J.-G. Salin
Keyword(s):  
Surface Layer ◽  
Theoretical Analysis ◽  
Simulation Model ◽  
Driving Forces ◽  
Point Of View ◽  
Drying Rate ◽  
Drying Time ◽  
Practical Point ◽  
Board Surface ◽  
External Driving

Summary In this study the influence of oscillating climates on the drying of timber is investigated theoretically. First, the effect of oscillations superimposed on an ordinary drying schedule is examined by solving the corresponding partial differential equations. It is shown that the average drying rate is not affected by the oscillations. Second, properly selected oscillation amplitudes and frequencies can result in enhanced mechano-sorptive creep in the board surface layer, which enables increased external driving forces with an unchanged risk of checking. This method is analysed by using a drying simulation model. It is shown that substantial reductions in the drying time can be obtained in theory. From a practical point of view the benefit is probably rather marginal.

scholarly journals Investigation of an Underwater Vectored Thruster Based on 3RPS Parallel Manipulator

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Tao Liu ◽  
Yuli Hu ◽  
Hui Xu ◽  
Mohamed El Ghami
Keyword(s):  
Theoretical Analysis ◽  
Numerical Simulations ◽  
Parallel Manipulator ◽  
Driving Forces ◽  
Autonomous Underwater Vehicles ◽  
Affecting Factors ◽  
Compact Structure ◽  
Thrust Vectoring ◽  
Pid Algorithm ◽  
Control Scheme

Autonomous underwater vehicles (AUVs) are important and useful tool platforms in exploring and utilizing ocean resource. However, the effect of control surfaces would decrease even invalid complete in this condition, and it is very hard for conventional AUVs to perform detailed missions at a low forward speed. Therefore, solving this problem of AUVs becomes particularly important to increase the application scope of AUVs. In this paper, we present a design scheme for the vectored thruster AUV based on 3RPS parallel manipulator, which is a kind of parallel manipulator and has advantages of compact structure and reliable performance. To study the performance and characteristics of the proposed thrust-vectoring mechanism, a series of works about corresponding kinematic and dynamic analysis have been performed through the theoretical analysis and numerical simulation. In the part of kinematics, the inverse, forward kinematics, and workspace analysis of the thrust-vectoring mechanism is presented, and the numerical simulations are accomplished to prove the feasibility and effectiveness of this design in AUVs. In order to further verify feasibility of the thrust-vectoring mechanism, based on the considerations of various affecting factors, a dynamic model of the designed thrust-vectoring mechanism is established according to theoretical analysis, and the driving forces of the linear actuator are presented through a series of numerical simulations. In addition, a control scheme based on PID algorithm is proposed for the designed vectored thruster with considering various affecting factors and the application environment. Meanwhile, the control scheme is also established and verified in MATLAB Simscape Mutibody. A series of numerical simulations of the thrust-vectoring mechanism prove the feasibility of the vectored thruster. According to equipping the designed vectored thruster, the AUVs can overcome the limit of weakening the control ability at zero or low forward speeds, and this improvement also expands the application of it, which has been scaled greatly.

Dynamic Analysis for Feed Mechanism of Cold Forging Machine Based on Sequence Solution

2013 ◽  
Vol 753-755 ◽  
pp. 1693-1698
Author(s):  
Chun Xiang Dai ◽  
Song Ji ◽  
Hong Yu Meng ◽  
Li Min Li
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Analysis ◽  
Matrix Method ◽  
Driving Forces ◽  
Cold Forging ◽  
Linkage Mechanism

Because traditional dynamic analysis for linkage mechanism would be on the basis of some assumptions such as driving forces, which may lead to impractical results for certain linkage mechanism. Therefore, the assumption about driving forces will be dismissed in the article during dynamic analysis for feed mechanism of cold forging machine, and the method of sequence solution is also introduced to replace matrix method for dynamic functions. In this case, the results would be practical and reliable for further theoretical analysis.

scholarly journals Charge regulation and local dielectric function in planar polyelectrolyte brushes

2012 ◽  
Vol 136 (23) ◽  
pp. 234901 ◽  
Author(s):  
Rajeev Kumar ◽  
Bobby G. Sumpter ◽  
S. Michael Kilbey
Keyword(s):  
Dielectric Function ◽  
Charge Regulation ◽  
Polyelectrolyte Brushes

scholarly journals Theoretical analysis of snow-dam decay

1992 ◽  
Vol 38 (128) ◽  
pp. 191-199
Author(s):  
Zhaojun Xia ◽  
Ming-ko Woo
Keyword(s):  
Theoretical Analysis ◽  
Slope Failure ◽  
Theoretical Study ◽  
Peak Flow ◽  
Driving Forces ◽  
The Arctic ◽  
Stream Channels ◽  
Seepage Erosion ◽  
Thermal Erosion ◽  
Arctic Streams

AbstractSnow dams have been observed in many stream channels in the Arctic and the sub-Arctic, but there is no theoretical analysis of their decay processes. These processes include snowmelt, seepage erosion, down-cutting, snow-slope failure and flotation of the snow dam. Snowmelt can be determined by the energy balance. Seepage of water will cause serious erosion at the point where the stream or pond level in front of the dam intersects the dam face. Erosion by water overflowing the dam is due to down-cutting, under-cutting and thermal erosion. Down-cutting increases with discharge but decreases with the shear strength of the snow. Where a hydraulic jump occurs downstream of the dam, under-cutting can accelerate dam decay. Thermal erosion, depending mainly on water temperature, may be less significant than the previous two processes. Slope failure occurs when the driving forces exceed the resisting forces, and these are affected by snow property and snow load. When the stream or pond level downstream of the dam rises rapidly, the dam is prone to float. As peak flow often occurs during the break-up period, results of the theoretical study of the mechanisms of snow-dam decay will improve flood forecasting for Arctic streams.

scholarly journals Theoretical analysis of snow-dam decay

1992 ◽  
Vol 38 (128) ◽  
pp. 191-199 ◽  
Author(s):  
Zhaojun Xia ◽  
Ming-ko Woo
Keyword(s):  
Theoretical Analysis ◽  
Slope Failure ◽  
Theoretical Study ◽  
Peak Flow ◽  
Driving Forces ◽  
The Arctic ◽  
Stream Channels ◽  
Seepage Erosion ◽  
Thermal Erosion ◽  
Arctic Streams

AbstractSnow dams have been observed in many stream channels in the Arctic and the sub-Arctic, but there is no theoretical analysis of their decay processes. These processes include snowmelt, seepage erosion, down-cutting, snow-slope failure and flotation of the snow dam. Snowmelt can be determined by the energy balance. Seepage of water will cause serious erosion at the point where the stream or pond level in front of the dam intersects the dam face. Erosion by water overflowing the dam is due to down-cutting, under-cutting and thermal erosion. Down-cutting increases with discharge but decreases with the shear strength of the snow. Where a hydraulic jump occurs downstream of the dam, under-cutting can accelerate dam decay. Thermal erosion, depending mainly on water temperature, may be less significant than the previous two processes. Slope failure occurs when the driving forces exceed the resisting forces, and these are affected by snow property and snow load. When the stream or pond level downstream of the dam rises rapidly, the dam is prone to float. As peak flow often occurs during the break-up period, results of the theoretical study of the mechanisms of snow-dam decay will improve flood forecasting for Arctic streams.

Microdiffraction Patterns of Small Metallic Particles II; Theoretical Analysis

1982 ◽  
Vol 40 ◽  
pp. 668-669
Author(s):  
A. Gómez ◽  
P. Schabes-Retchkiman ◽  
M. José-Yacamán ◽  
T. Ocaña
Keyword(s):  
Experimental Data ◽  
Electron Diffraction ◽  
Theoretical Analysis ◽  
Size Range ◽  
Dynamical Theory ◽  
Metallic Particles ◽  
Splitting Effect

The splitting effect that is observed in microdiffraction pat-terns of small metallic particles in the size range 50-500 Å can be understood using the dynamical theory of electron diffraction for the case of a crystal containing a finite wedge. For the experimental data we refer to part I of this work in these proceedings.

Solute redistribution during in-situ irradiation of alloys in the high voltage electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 370-371
Author(s):  
P. R. Okamoto ◽  
N.Q. Lam ◽  
R. L. Lyles
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Driving Forces ◽  
Solute Diffusion ◽  
Solute Redistribution ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron ◽  
Thin Foils ◽  
Solute Atoms

During irradiation of thin foils in a high voltage electron microscope (HVEM) defect gradients will be set up between the foil surfaces and interior. In alloys defect gradients provide additional driving forces for solute diffusion since any preferential binding and/or exchange between solute atoms and mobile defects will couple a net flux of solute atoms to the defect fluxes. Thus, during irradiation large nonequilibrium compositional gradients can be produced near the foil surfaces in initially homogeneous alloys. A system of coupled reaction-rate and diffusion equations describing the build up of mobile defects and solute redistribution in thin foils and in a semi-infinite medium under charged-particle irradiation has been formulated. Spatially uniform and nonuniform damage production rates have been used to model solute segregation under electron and ion irradiation conditions.An example calculation showing the time evolution of the solute concentration in a 2000 Å thick foil during electron irradiation is shown in Fig. 1.

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