scholarly journals Don't Be Tricked by Your Integrated Rate Plot (the author replies)

2004 ◽  
Vol 81 (1) ◽  
pp. 32 ◽  
Author(s):  
Edward Urbansky
Keyword(s):  
Rate Plot

Rheology and structure of blood suspensions

1964 ◽  
Vol 19 (1) ◽  
pp. 127-133 ◽  
Author(s):  
S. E. Charm ◽  
W. McComis ◽  
G. Kurland
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Yield Stress ◽  
Structural Model ◽  
Cell Suspensions ◽  
Rate Curve ◽  
Red Cell ◽  
Shear Rates ◽  
Straight Line ◽  
Rate Plot

A structural model developed for kaolin suspensions was applied to blood in order to determine the structure and strength of the red cell suspensions. The yield stress of red cell suspensions determined in settling experiments agreed with the yield stress determined from shear stress-shear rate information employing Casson's equation. Theoretical considerations indicate that the shear stress-shear rate curve for blood should approach a straight line. This was found to be true at shear rates above 40 sec-1. The slope of this line was predicted from calculations based on sedimentation experiments and a modified Einstein's equation. The data suggest that the curvature of the shear stress-shear rate plot at low shear rates is due to aggregates of cells which break down under increasing shear rate, resulting finally in individual flocs. It is suggested that a floc consists of one to four cells with adhering plasma. The aggregate was calculated to have twice as much plasma associated with it as does a floc. However, the size of the aggregate could not be determined since the number of flocs associated with an aggregate could not be determined. shear stress-shear rate curve; red cell floc; red cell aggregate; sedimentation rate; blood viscosity and flow Submitted on February 28, 1963

Decay Rate Plot of Stored Beam Current and Touschek Limit of Current-Lifetime Product

1986 ◽  
Vol 25 (Part 1, No. 11) ◽  
pp. 1706-1710 ◽  
Author(s):  
Takio Tomimasu ◽  
Tetsuo Yamazaki ◽  
Tomohisa Mikado ◽  
Suguru Sugiyama ◽  
Mitsukuni Chiwaki ◽  
...  
Keyword(s):  
Decay Rate ◽  
Beam Current ◽  
Rate Plot

Estimations of Touschek effect and ion clearing by the decay rate plot method

1989 ◽  
Vol 60 (7) ◽  
pp. 1744-1747 ◽  
Author(s):  
Takio Tomimasu ◽  
Tsutomu Noguchi ◽  
Suguru Sugiyama ◽  
Tetsuo Yamazaki ◽  
Tomohisa Mikado ◽  
...  
Keyword(s):  
Decay Rate ◽  
Rate Plot

A Balanced IIRS Model for Investigating the Dynamics of Damped Rotor Bearing System

2014 ◽  
Author(s):  
S. Chandraker ◽  
H. Roy
Keyword(s):  
Symmetric Matrices ◽  
Internal Damping ◽  
Order Model ◽  
Complex Behaviour ◽  
Campbell Diagram ◽  
Reduced Order ◽  
Rotor Bearing ◽  
The Matrix ◽  
Rate Plot ◽  
Bearing System

In this paper the application of the balanced Iterative Improved Reduction model techniques to complex rotor-bearing systems is investigated. It is demonstrated that, Iterative Improved Reduction System (IIRS) improves the matrix reductions by ensuring that the transformation matrix for each reduction is optimized. This reduction technique also benefices the problem due to skew symmetric matrices, which arises for inclusion of gyroscopic effect and internal damping. Numerical examples are solved to demonstrate the validity and efficiency of the reduced order model in representing the dynamics of the actual rotor system. Under these conditions, the complex behaviour of the rotor-shaft is studied to get an insight of the dynamic characteristics of the system, in terms of Campbell Diagram, Decay rate plot and Unbalance Response. Many researchers adopted different methodology for obtaining the model reduction but their work is limited up to undamped system. This work is started by motivation of the absentia of work for damped rotor bearing system.

scholarly journals Viscoelastic effects during unloading in depth-sensing indentation

2002 ◽  
Vol 17 (10) ◽  
pp. 2604-2610 ◽  
Author(s):  
A. H. W. Ngan ◽  
B. Tang
Keyword(s):  
Linear Viscoelasticity ◽  
Room Temperature ◽  
Peak Load ◽  
Displacement Curve ◽  
Linear Variation ◽  
Depth Sensing ◽  
Viscosity Parameter ◽  
Viscoelastic Effects ◽  
Unloading Rate ◽  
Rate Plot

With polypropylene as a prototype viscoelastic material at room temperature, it was found that a “nose” may appear in the unloading segment of the load–displacement curve during nanoindentation when the holding time at peak load is short and/or the unloading rate is small, and when the peak load is high enough. The load at which the nose appears was also found to decrease linearly with decreasing unloading rate. A linear viscoelasticity analysis was performed to interpret this effect. The analysis predicts a linear variation between the nose load and the unloading rate, and the slope of such a linear variation is also shown to be proportional to the viscosity parameter of the material. Thus, by measuring the slope of the nose-load versus unloading rate plot at a given temperature, the viscosity parameter of the specimen can be found. This is a new way of measuring the viscosity parameter of a material in addition to the existing method of force modulation and noting the frequency response of the displacement.

Rheological Characteristics of Gum Elastomers

1976 ◽  
Vol 49 (1) ◽  
pp. 52-63 ◽  
Author(s):  
N. Nakajima ◽  
E. A. Collins
Keyword(s):  
Deformation Rate ◽  
Viscoelastic Properties ◽  
Time Pressure ◽  
Pressure Time ◽  
Ultimate Properties ◽  
Rupture Energy ◽  
Rate Plot ◽  
As Stress ◽  
Temperature Time

Abstract A systematic characterization of gum elastomers may be done by measuring viscoelastic and ultimate properties. The viscoelastic properties of amorphous elastomers can be reduced to a master curve by means of the temperature-time, pressure-time, and strain-time correspondence principles. If a structure, e.g. crystallinity, develops with a change of temperature, pressure, or strain, such structural change may be regarded as a deviation. The ultimate properties may be represented either as stress-strain at break, modulus-strain at break, rupture-energy-deformation-rate, or stress-at-break-deformation-rate and strain-at-break-deformation-rate. The modulus-strain-at-break plot shows promise for interpreting mill processability in terms of the basic rheological properties. The rupture-energy-deformation-rate plot supplies a useful quantitative input for mill mixing.

Effects of the vertical and horizontal availability of food resources: the diet selection of sheep grazing on natural grassland

2014 ◽  
Vol 153 (2) ◽  
pp. 322-334 ◽  
Author(s):  
W. Q. CHEN ◽  
X. Y. WANG ◽  
Y. J. ZHANG ◽  
D. HUANG
Keyword(s):  
Plant Species ◽  
Diet Composition ◽  
Influencing Factor ◽  
Diet Selection ◽  
Leymus Chinensis ◽  
Individual Plant ◽  
Stocking Rate ◽  
Grazing Impacts ◽  
Rate Plot ◽  
June July

SUMMARYThe relationship between sheep diet selection and the vertical/horizontal availability of plant species on complex natural Leymus chinensis grassland was investigated. Two plots (low and high stocking rate plots) with different vegetation availabilities, created by adjusting sheep numbers, were studied for 3 months (June, July and August). In each month, the sheep's diet composition was estimated using n-alkanes in combination with long-chain alcohols and/or fatty acid markers. Vertical (sward surface height) and horizontal food availability (proportion cover of individual plant species) were determined simultaneously. The results revealed that sheep diet composition varied greatly according to seasonal variations in vegetation availability, and that sheep diet selection was related to the vertical and horizontal availability of plant species on both plots. Horizontal availability, which turned out to be the main influencing factor, was strongly and positively correlated with sheep diet composition in each month on both plots. On the low stocking rate plot, vertical availability affected sheep consumption in June, July and August. In contrast, a significant correlation between diet composition and vertical availability was only observed in July on the high stocking rate plot. These results suggest that the relative importance of vertical and horizontal availability differed between plots depending on vegetation availability. Horizontal availability played a more important role than vertical availability when sheep grazed freely on natural L. chinensis grassland. Finally, the changing selectivity index for each plant species in each grazing period on both plots indicated different grazing impacts on vegetation communities when vegetation availability differed.

The threshold growth response ofLactobacillus caseito 5-methyl-tetrahydrofolic acid: implications for folate assays

1985 ◽  
Vol 53 (3) ◽  
pp. 569-573 ◽  
Author(s):  
A. J. A. Wright ◽  
D. R. Phillips
Keyword(s):  
Folic Acid ◽  
Growth Response ◽  
Current Knowledge ◽  
Basal Medium ◽  
Maximum Velocity ◽  
Rate Limiting Step ◽  
Absolute Growth ◽  
Tetrahydrofolic Acid ◽  
Rate Plot ◽  
Rate Limiting

1. The comparative and absolute growth response of Lactobacillus casei was measured nephelometrically for time periods of 17–23 h in the microbiological assay of folic acid and 5-methyl-tetrahydrofolic acid at concentrations of 0–8 ng/10 ml basal medium at pH 6.8.2. At concentrations of 0–1 ng/10 ml the comparative growth response to 5-methyl-tetrahydrofolic acid was markedly depressed whereas growth was the same at 2 ng/10 ml and above. Comparative growth was unaffected by the length of assay incubation, depressed growth being due to differences in log-phase growth rates with the rate-plot for 5-methyl-tetrahydrofolic acid being sigmoidal and for folk acid being a rectangular hyperbola with linearity only in the 0–1 ng/10 ml range. The reciprocal rate-plot for folic acid was linear whereas that for 5-methyl-tetrahydrofolic acid was coincidental only in part, giving rise to the same estimate of maximum velocity and substrate concentration for half-maximum velocity, with the exhibition of a strong threshold at low concentration.3. A previous observation (Phillips & Wright, 1982) that the L. casei growth response to 5-methyl-tetrahydrofolic acid may be significantly less than that to folic acid is confirmed as is the long-established view that the response to both folates may be equal. In the light of current knowledge regarding folate-binding, transport and metabolism by L. casei, it is argued that the intracellular oxidation of 5-methyl-tetrahydrofolic acid to 5, 10-methylene-tetrahydrofolic acid is a rate-limiting step at low substrate concentrations, subsequently giving rise to a threshold growth response peculiar to 5-methyl-tetrahydrofolic acid. Since the rate of L. cusei growth with folk acid is not linearabove 1 ng/10 ml, it is recommended that microbiological folate assays be conducted only in the 0–1 ng/10 ml range and at a pH that elicits the same growth response from L. casei to 5-methyl-tetrahydrofolic acid as to folic acid and other folate monoglutamates.

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