scholarly journals OPTIMIZATION OF VESSELS SIZES FROM THE CONDITIONS OF THE MINIMUM HULL SURFACE AREA

2020 ◽  
Vol 2018 (1) ◽  
pp. 61-63
Author(s):  
Sergey Scherbin ◽  
Bogdan Vnukov ◽  
Konstantin Gordeev
Keyword(s):  
Surface Area ◽  
Minimum Surface ◽  
Minimum Surface Area ◽  
Optimal Diameter

The method of optimization of vessels sizes for the reasons of the minimum surface area of the hull is considered. The dependences of the optimal diameter, height and minimum surface area of the tank body on the volume are obtained.

Geometry and Soap Bubbles

1964 ◽  
Vol 47 (364) ◽  
pp. 205-208
Author(s):  
R. W. Calvert
Keyword(s):  
Surface Area ◽  
Soap Films ◽  
Soap Bubbles ◽  
Minimum Surface ◽  
Minimum Surface Area

Owing to the tendency of soap films to form the minimum surface area the surfaces of bubbles are spherical and intersect at 120°.

ADSORPTION OF STERICALLY HINDERED PHENOLS ON CARBON

1959 ◽  
Vol 37 (8) ◽  
pp. 1235-1240 ◽  
Author(s):  
Owen H. Wheeler ◽  
Eric M. Levy
Keyword(s):  
Surface Area ◽  
Hydroxyl Group ◽  
Sterically Hindered Phenols ◽  
Freundlich Isotherms ◽  
Minimum Surface ◽  
Alkyl Groups ◽  
Hindered Phenols ◽  
Sterically Hindered ◽  
Minimum Surface Area

The Freundlich isotherms for the adsorption of some ortho-alkylated phenols on carbon from cyclohexane solution have been determined. The minimum surface area covered by the adsorbed phenols is compared with the area of the molecules themselves. Large alkyl groups ortho to the hydroxyl group greatly reduce the adsorption.

Polyhedral carbon nanofoams with minimum surface area partitions produced using silica nanofoams as templates

Carbon ◽  
2010 ◽  
Vol 48 (11) ◽  
pp. 3121-3130 ◽  
Author(s):  
Linda L. Hussami ◽  
Robert W. Corkery ◽  
Lars Kloo
Keyword(s):  
Surface Area ◽  
Minimum Surface ◽  
Minimum Surface Area

Triangulation of Branching Contours Using Area Minimization

1998 ◽  
Vol 08 (04) ◽  
pp. 389-406 ◽  
Author(s):  
Mu Hong ◽  
Thomas W. Sederberg ◽  
Krzysztof S. Klimaszewski ◽  
Kazufumi Kaneda
Keyword(s):  
Surface Area ◽  
Piecewise Linear ◽  
New Method ◽  
Minimum Surface ◽  
Area Minimization ◽  
Current Algorithm ◽  
Minimum Surface Area ◽  
Minimal Area

This paper presents a new method for reconstructing piecewise linear surfaces from planar polygonal contours that branch. For non-branching contours, experience has shown that the piecewise linear surface of minimum surface area which connects a pair of contours often provides a good solution. The current algorithm extends this idea by searching for the surface of minimal area which connects two contours comprised of more than one polygon. Several examples that justify this heuristic are provided.

Investigation of the Inhibitive Effect of Hexatriethanolamine Derivatives on Corrosion of Carbon Steel Pipelines in 1M HCI

2013 ◽  
Vol 787 ◽  
pp. 216-221
Author(s):  
Omnia A.A. El-Shamy ◽  
Abdullah S. Al-Ayed
Keyword(s):  
Surface Tension ◽  
Carbon Steel ◽  
Critical Micelle Concentration ◽  
Surface Area ◽  
Corrosion Inhibition ◽  
Surface Activity ◽  
Inhibition Efficiency ◽  
Surface Excess ◽  
Corrosion Inhibition Efficiency ◽  
Minimum Surface Area

The corrosion inhibition efficiency of carbon steel pipelines in 1M HCl by the synthesized hexatriethyleneamine derivatives potensiodynamic polarization 30 oC. The results showed that all synthesized inhibitors were good inhibitors and their inhibition efficiencies were significantly increased with increasing concentration. The surface activity were calculated from its surface tension measurements including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).

Space Structures for Low-stress Environments

2005 ◽  
Vol 20 (3) ◽  
pp. 127-133 ◽  
Author(s):  
Bezaleel S. Benjamin
Keyword(s):  
Architectural Design ◽  
Cost Effective ◽  
Space Structure ◽  
Space Structures ◽  
Efficient Design ◽  
Minimum Surface ◽  
Stress Environments ◽  
Effective Design ◽  
Relevant Consideration ◽  
Minimum Surface Area

This paper examines the criteria for the architectural design of space structures in low-stress environments, where stress-carrying ability is no longer a relevant consideration in the design of the space structure. In such environments, ergonomics and minimum surface criteria can lead to the most efficient design of the space structure. Based on these two criteria, the paper then considers the architectural design of a space tunnel and an interchange station. In direction-controlled artificial gravity environments, the nesting of ergonomic shapes, for minimum surface area, can lead to even more cost-effective design. 3–D computer graphics are used to display the results of this research.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Cell morphology, volume, and surface area determinations from multilevel contouring within HVEM micrographs of serial sections and whole-cell mounts

1987 ◽  
Vol 45 ◽  
pp. 588-589
Author(s):  
M. Marko ◽  
A. Leith ◽  
D. Parsons
Keyword(s):  
Surface Area ◽  
Electron Micrographs ◽  
Cell Morphology ◽  
Individual Variation ◽  
Serial Section ◽  
Stereo Pair ◽  
Complex Structures ◽  
Serial Sections ◽  
Surface Areas ◽  
Computer Based

The use of serial sections and computer-based 3-D reconstruction techniques affords an opportunity not only to visualize the shape and distribution of the structures being studied, but also to determine their volumes and surface areas. Up until now, this has been done using serial ultrathin sections.The serial-section approach differs from the stereo logical methods of Weibel in that it is based on the Information from a set of single, complete cells (or organelles) rather than on a random 2-dimensional sampling of a population of cells. Because of this, it can more easily provide absolute values of volume and surface area, especially for highly-complex structures. It also allows study of individual variation among the cells, and study of structures which occur only infrequently.We have developed a system for 3-D reconstruction of objects from stereo-pair electron micrographs of thick specimens.

The Basic Physical Principles of Ion, Electron, and X-Ray Detectors and Their Application to Microanalysis

1985 ◽  
Vol 43 ◽  
pp. 154-157
Author(s):  
A.J. Tousimis
Keyword(s):  
Ion Beam ◽  
Depth Resolution ◽  
Sample Surface ◽  
High Energy ◽  
X Rays ◽  
X Ray ◽  
Electrons And Ions ◽  
Spatial Depth ◽  
Minimum Surface Area ◽  
Physical Principles

An integral and of prime importance of any microtopography and microanalysis instrument system is its electron, x-ray and ion detector(s). The resolution and sensitivity of the electron microscope (TEM, SEM, STEM) and microanalyzers (SIMS and electron probe x-ray microanalyzers) are closely related to those of the sensing and recording devices incorporated with them.Table I lists characteristic sensitivities, minimum surface area and depth analyzed by various methods. Smaller ion, electron and x-ray beam diameters than those listed, are possible with currently available electromagnetic or electrostatic columns. Therefore, improvements in sensitivity and spatial/depth resolution of microanalysis will follow that of the detectors. In most of these methods, the sample surface is subjected to a stationary, line or raster scanning photon, electron or ion beam. The resultant radiation: photons (low energy) or high energy (x-rays), electrons and ions are detected and analyzed.

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