scholarly journals Water sensitive papers simulation to assess deposits on targets

2013 ◽  
Vol 44 (2s) ◽  
Author(s):  
Emanuele Cerruto ◽  
Claudia Aglieco
Keyword(s):  
Image Data ◽  
Phytosanitary Treatment ◽  
Processing Software ◽  
Image Processing Software ◽  
Log Normal ◽  
Constant Coefficient Of Variation ◽  
The Impact ◽  
Log Normal Distribution ◽  
Effective Water

Aim of the study is to assess the possibility to use water sensitive papers to estimate, beside the superficial coverage, also the amount of deposit on the target at varying the spray features. To point out the main quantities influencing the deposit, the behaviour of the water sensitive papers was simulated by assuming some simplifying hypotheses: log-normal distribution of the diameter population of the drops and circular spots. Several images (630) of water sensitive papers, sprayed with drops of different mean diameter (from 100 up to 500 μm), constant coefficient of variation (0.50), and theoretical percentage of covered surface ranging from 10 up to 100%, were produced by means of simulation. These images were considered as effective water sensitive paper images and then analysed by means of an image processing software. The correlations between measured and effective values were studied and they allowed for an estimate of deposit and spray features from the image data. This implies that the analysis of the water sensitive paper images allows the determination of more complex parameters such as the unitary deposit and the impact density, all data strictly related to the efficacy of a phytosanitary treatment.

scholarly journals A note on the relations of certain parameters following a logarithmic transformation

1955 ◽  
Vol 34 (2) ◽  
pp. 289-296 ◽  
Author(s):  
Mary Bagenal
Keyword(s):  
Coefficient Of Variation ◽  
Biological Data ◽  
Logarithmic Transformation ◽  
Confidence Limits ◽  
Formal Relation ◽  
Log Normal ◽  
Constant Coefficient Of Variation ◽  
Log Normal Distribution ◽  
Different Sources

The logarithmic transformation has been used in the statistical analysis of certain marine biological data. Parameters calculated from the transformed distributions have been used in the description of the observations, but it appears that some of the mathematical procedures adopted have not been fully understood.Winsor & Clarke (1940) have analysed data from plankton hauls. The problem considered by them was the determination of the variability in numbers of animals caught by repeated hauls through the same body of water. The raw data were characterized by a constant coefficient of variation, i.e. the variability in catch was proportional to the size of the catch. By transformation from the actual numbers caught to their logarithmic values, it was possible to equalize the variances and to apply the method of analysis of variance to esti-mate the variability due to the different sources. Finally, an estimate of the coefficient of variation was obtained from the logarithmic values. Their method of estimation was quoted by Snedecor (1946, p. 451) and was employed by Barnes & Bagenal (1951) in their study of repeated trawl hauls. Barnes & Bagenal also calculated confidence limits for comparison of observations following the method of Silliman (1946) in his work on pilchard eggs. These methods seem to be based on a misunderstanding of the nature of a trans-formation. The formal relation between the variance of such transformed data and the coefficient of variation of the untransformed data follows from the moments of the ‘log-normal’ distribution, given first by Wicksell (1917). From these moments it will be shown that the method given by Winsor & Clarke is mathematically unsound.

scholarly journals Introducing Zoomify Image

2007 ◽  
Vol 26 (1) ◽  
pp. 48 ◽  
Author(s):  
Adam Smith
Keyword(s):  
Image Processing ◽  
Response Times ◽  
Image Data ◽  
Web Browser ◽  
Cornell University ◽  
High Resolution Images ◽  
Cross Platform ◽  
Processing Software ◽  
Image Processing Software ◽  
The Web

Zoomify Image is a mature product for easily publishing large, high-resolution images on the Web. End users view these images with existing Webbrowser software as quickly as they do normal, downsampled images. A Flash-based Zoomifyer client asynchronously streams image data to the Web browser as needed, resulting in response times approaching those of desktop applications using minimal bandwidth. The author, a librarian at Cornell University and the principal architect of a small, open-source company, worked closely with Zoomify to produce a cross-platform, opensource implementation of that company’s image-processing software and discusses how to easily deploy the product into a widely used Webpublishing environment. Limitations are also discussed as are areas of improvement and alternatives.

Determination of Particle Size of a Dispersed Phase by Small-Angle X-ray Scattering

1989 ◽  
Vol 171 ◽  
Author(s):  
Frank C. Wilson
Keyword(s):  
Particle Size ◽  
High Resolution ◽  
Spherical Particles ◽  
Dispersed Phase ◽  
X Ray ◽  
X Ray Scattering ◽  
Resultant Data ◽  
Log Normal ◽  
Log Normal Distribution

ABSTRACTA method for determining particle diameters up to ca 500 rnm is described. X-ray data are obtained with an ultra-high resolution Bonse-Hart diffractometer and subsequently desmeared. The resultant data, viewed as the invariant argument h l(h), are interpreted as arising from a log-normal distribution of independent spherical particles. The distribution is characterized by its median value and breadth.

Analyzing TEM Images for Accurate Determination of Lattice Parameters of Vacuum Evaporated SnSe Thin Film by Image Processing Software

2016 ◽  
Vol 1141 ◽  
pp. 51-53
Author(s):  
Chetan Zankat ◽  
V.M. Pathak ◽  
Pratik Pataniya ◽  
G.K. Solanki ◽  
K.D. Patel ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Image Processing ◽  
Optical Properties ◽  
Room Temperature ◽  
Accurate Determination ◽  
Lattice Parameters ◽  
Processing Software ◽  
Image Processing Software

Amorphous SnSe thin films were deposited by thermal evaporation technique on glass substrates kept at room temperature in a vacuum better than 10-5Torr. A detailed study of structural and optical properties of 150 nm thin film was carried out. The selected area diffraction patterns obtained by TEM for this thin film were analyzed by a new method that involves accurate determination of lattice parameters by image processing software. The obtained results are in good agreement with the JCPDS data. Optical transmission spectra obtained at room temperature were analyzed to study optical properties of deposited thin films. It has been found that indirect carrier transition is responsible for optical absorption process in the deposited thin films.

SERUM THYROGLOBULIN IN PATIENTS WITH TOXIC AND NON-TOXIC GOITRES COMPARED TO SEX- AND AGE-MATCHED CONTROL SUBJECTS

1979 ◽  
Vol 91 (2) ◽  
pp. 264-270 ◽  
Author(s):  
Ulla Feldt-Rasmussen ◽  
Karine Bech ◽  
John Date
Keyword(s):  
Matched Control ◽  
Diagnostic Value ◽  
Thyroid Disorders ◽  
Serum Thyroglobulin ◽  
Control Subjects ◽  
Distribution Of Values ◽  
Log Normal ◽  
Log Normal Distribution ◽  
Serum Tsh

ABSTRACT To study serum thyroglobulin (Tg) levels in patients with thyroid disorders compared to sex- and age-matched control subjects and to correlate the Tg levels to the thyroid function, 71 patients were investigated before treatment was started. Serum Tg, measured by a double antibody radioimmunoassay, was elevated in all groups with thyroid disorders, as compared to their controls, but the values showed large overlaps between groups. The highest median values were seen in the two groups of patients with toxic goitres (toxic adenoma and Graves' disease). The Tg values in patients with non-toxic goitres (diffuse and nodular) and in controls showed a log normal distribution, whereas the distribution of values from patients with toxic goitres was different. No correlation was found between serum Tg and serum thyroxine, serum triiodothyronine and serum TSH, respectively. It is concluded that determination of serum Tg is of little diagnostic value in thyroid diseases.

A new image processing software system for structural analysis and contrast enhancement

1978 ◽  
Vol 36 (1) ◽  
pp. 210-211
Author(s):  
Joachim Frank ◽  
Brian Shimkin
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Image Data ◽  
Present System ◽  
Software System ◽  
Point Mapping ◽  
Digital Equipment Corp ◽  
Electron Image ◽  
Processing Software ◽  
Image Processing Software

We report on the development of a new image processing software system SPIDER (System for Processing of Image Data in Electron Microscopy and Related Fields). The need for a user-oriented software system for electron image processing has been previously recognized /1-4/. These systems have in common that they allow users with a minimum amount of computer experience to define complex operations on images.The present system runs under the PDP 11/45 RSX-11D (Digital Equipment Corp.) executive in a multi-user, multi-task environment. Image enhancement of large images (e.g., box convolution and point mapping operations) as well as structural electron microscopy (Fourier operations, 3-d reconstruction) had to be accommodated. Characteristic for the electron microscope application is the need to process series of images closely related to each other (defocus, tilting, and averaging series).In SPIDER, the images are read and transferred by magnetic tape from the microdensitometer to PDP 11 disk files.

scholarly journals Measurement of Steel Structure Elements in the Specialized Module of the IMAGE-SP Image Processing Software

2020 ◽  
Vol 11 (4) ◽  
pp. 279-288
Author(s):  
A. G. Anisovich
Keyword(s):  
Image Processing ◽  
Grain Size ◽  
Quantitative Analysis ◽  
Metals And Alloys ◽  
Austenitic Steels ◽  
Metallographic Analysis ◽  
Software Products ◽  
Processing Software ◽  
Image Processing Software

Grain size is one of the most important characteristics of the microstructure of metals and alloys. Determination of the grain size of steel is regulated by Standart 5639-82 "Steels and alloys. Methods for detection and determination of the grain size". Standart includes determining the grain score by comparison with reference scales, as well as manual measurement methods. The use of image processing software opens up new opportunities for the materials analysis, including for the quantitative metallographic analysis of steels and alloys. The purpose of this work was to test the specialized "Metallography" module to determine the grain score of the image processing software "IMAGE – SP", as well as to check the reliability of the obtained results using the example of ferritic and austenitic steels.In the "Metallography" module, the analysis of standard images of annex No. 3 of Standart 5639-82, as well as real images of the structures of ferritic and austenitic steel, is carried out. It is shown that the results correspond to the definition of the Standart grain score. The divergence in the results is 1 point, which is acceptable.The active development of software products for the quantitative analysis of images in metallography will make it possible to legitimize the methods of computer measurement of parameters of the structures of metals and alloys by creating appropriate standards. Successful testing of the specialized "Metallography" module demonstrates opportunities and prospects for further development of specialized software products for measuring quantitative values of metal and alloy structures. The active development of software for quantitative analysis of the images in metallography will make it possible to legalize methods for measuring parameters of metal and alloy structures by computer techniques.

scholarly journals Development of the New Analytic Model for Sand Deposition Particles Downstream of a Fence

Inventions ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 4
Author(s):  
Peyman Razi
Keyword(s):  
Snow Accumulation ◽  
Analytic Model ◽  
Distribution Profile ◽  
Proposed Model ◽  
Simulation Domain ◽  
Discrete Phase ◽  
Sand Particles ◽  
Log Normal ◽  
Log Normal Distribution

Movement of sand particles is a complicated phenomenon that occurs in nature. In this paper, the main goal is to provide an analytic model for the deposition profile of sand particles downstream of a fence. The analytic model was derived with respect to governing equations and shear flows for upstream and downstream regions. In this approach, we obtain a new expression for the downstream velocity of the fence, which allows for the determination of potential areas of deposition particles by assuming a log-normal distribution profile. A discrete-phase flow (DPM) was used to inject particles in the simulation domain. The DPM gives capabilities to capture spatiotemporal velocities components, as we can define the probability of deposition particles in the downstream of the fence. The proposed model was validated with a numerical model and experimental results. The comparison with field data and numerical results shows that the deposition profile is in acceptable agreement. With some assumptions and modifications about the properties of particles, the results of this research can be extended to snow accumulation downstream of a fence.

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