scholarly journals Determination of the Probability of Penetration of Manure Particles Through the Layers of Ferromagnetic Elements in the Vortex Layer Devices

2021 ◽  
pp. 36-39
Author(s):  
P.I. Gridnev ◽  
◽  
T.T. Gridneva ◽  
Keyword(s):  
Vortex Layer ◽  
Geometrical Dimensions

Theoretical dependences are presented for determining the probability of penetration of manure particles through the layers of rotating ferromagnetic elements in the vortex layer device taking into account their number and geometrical dimensions, and parameters of the working area.

Determination of mechanical parameters for rotating MEMS structures as a function of deposition method

2003 ◽  
Vol 795 ◽  
Author(s):  
S. Soare ◽  
S. J. Bull ◽  
A. Oila ◽  
A. G. O'Neill ◽  
N. Wright ◽  
...  
Keyword(s):  
Creep Behaviour ◽  
Peak Load ◽  
Mechanical Parameters ◽  
Deposition Method ◽  
Element Analysis ◽  
Microelectronic Devices ◽  
Micro Sensor ◽  
Geometrical Dimensions ◽  
Modelling Data

ABSTRACTThe dimensions of microelectronic devices are constantly being reduced due to the increasing operational demands imposed such as higher working frequencies, higher component density and lower power consumption. This affects the geometrical dimensions of the metallisation, i.e. its width and thickness. The mechanical properties of very thin films are considerably different from those of bulk materials and, also, the deposition method may influence the mechanical behaviour of the components. In order to obtain reliable metallisation it is therefore important to assess accurately the mechanical parameters of the interconnecting lines. As part of designing, developing and manufacturing of a stress micro-sensor there is a need to extract properties useful for performance prediction such as yield stress or creep relaxation behaviour. Part of the data may be obtained by nanoindentation but to have a more complete view, finite element analysis of the indentation cycle has to be employed. In this study nanoindentation testing was carried out at various depths on sputtered and evaporated aluminium layers with different thicknesses deposited on (100) silicon. The loading curves were then simulated by FEA and the results compared to identify the yield properties of the coating. Modelling data for thicker samples closely follows experimental data but for thinner coatings there is a considerable gradient in properties through the film thickness. By incorporating a peak load hold the creep behaviour of the metallization can also be assessed and modelling parameters developed.

Method of Flexible Fence Geometry Determination in the Context of the Small-Sized Objects Sorting Process

2018 ◽  
Author(s):  
Tomasz Piatkowski ◽  
Miroslaw Wolski
Keyword(s):  
Process Parameters ◽  
Optimal Parameters ◽  
Automatic Sorting ◽  
Conveyor Belts ◽  
Sorting Process ◽  
Three Stages ◽  
Selection For ◽  
Mass Spring ◽  
Geometrical Dimensions

The paper presents a proposal for a method for determining the geometrical dimensions of a rotary flexible fence used in the process of automatic sorting of small-sized objects transported on conveyor belts. The method consists of three stages: 1 – determination of the preferred outline and material of the fence, 2 – optimal parameters determination of the sorting process, 3 – dimensions selection for the preferred geometry of the fence with reference to the mass of scraped objects and the sorting process parameters. The stages adopted allow to select the optimal mass-spring-damper characteristics of the fences in the context of the assumed level of efficiency, reliability and minimization of the dynamic reactions of the sorting process.

scholarly journals PROCESS MODELING OF THE FIRST MECHANICAL CROP TENDING OF CULTIVATED CROP IN LABORATORY CONDITIONS

2020 ◽  
pp. 6-13
Author(s):  
Е. S. Zykin ◽  
◽  
V. I. Kurdyumov ◽  
Keyword(s):  
Statistical Treatment ◽  
Empirical Support ◽  
Optimization Criterion ◽  
Operating Conditions ◽  
Cultivated Plants ◽  
Laboratory Conditions ◽  
Flat Disk ◽  
Speed Change ◽  
Geometrical Dimensions

Conducted analysis of calculation methods of estimated figures of facilities for crop tending of cultivated crop according to hilled technology showed that in the theories of determination of geometrical dimensions and shapes of working parts surfaces of inter-row cultivator now some points are left, which are not solved . Besides, obtained data from studies of many scientists can be applied to new working tool with flat discs for inter-row cultivator. Consequently, additional theoretical and empirical support of optimal constructive-operating conditions of above mentioned working tools of inter-row cultivator is demanded. For mechanized crop tending of cultivated crop according to hilled technology we offered working tool of inter-row cultivator with flat disc, set for native or foreign inter- row cultivator. Offered working tool of cultivator will allow to clip off pest in seed inter rows of cultivated plants, and also dust not cut pests on the flanks of ridges and between culms of cultivated crop on upper base of soil rigs . In the article process of formation of secondary soil rigs by working tools with flat discs during modeling the first mechanized crop tending of cultivated crops in laboratory conditions is observed. Considering agrotechnical requirements and physical mechanical properties of soil, reference profile of soil rigs is accepted, forming during mechanized crop tending, which conditionally can accept as ideal, and an original optimization criterion . After practical realization of research in soil box and statistical treatment of obtained data fit equations were got, in which independent factors of process took the form of natural and coded levels. It was found out that speed change of cultivator moving within 1,2...2,4 m/s, angled к of flat disk approach angle from 5º to 20º, increases the range of soil throwing away and width of soil dust on the flanks and upper base of the first soil rigs (kсэ → max). At the angle of  attack of flat discs within 25º...30º and cultivator conveying speed from1,2 m/s to 1,6 m/s there is growth of width of dusted layers hпр, an coefficient kсэ is maximum (kсэ = 0,98 with diameter of flat discs 0,3 m).

Determination of the magnetic moment and geometrical dimensions of the magnetotactic bacteria using an optical scattering method

2008 ◽  
Vol 103 (9) ◽  
pp. 094911 ◽  
Author(s):  
Petre Cătălin Logofătu ◽  
Ioan Ardelean ◽  
Dan Apostol ◽  
Iuliana Iordache ◽  
Mihaela Bojan ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Magnetotactic Bacteria ◽  
Optical Scattering ◽  
Scattering Method ◽  
Geometrical Dimensions

scholarly journals HYDRAULIC HEAVE – DESIGN CHARTS AND DESIGN FORMULA FOR THE REQUIRED EMBEDDED LENGTH

2014 ◽  
Vol 6 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Benjamin Aulbach ◽  
Martin Ziegler
Keyword(s):  
Boundary Conditions ◽  
Approximate Solutions ◽  
Unit Weight ◽  
Design Formula ◽  
Design Charts ◽  
Submerged Soil ◽  
The Difference ◽  
Geometrical Dimensions ◽  
Geometrical Boundary

For the determination of the required embedded length for the safety against hydraulic heave several approximate solutions exist. However, most of these solutions do not take into account the geometrical boundary conditions such as width B and length L of the excavation as well as the thickness of the aquifer S. Thus, values obtained by such simplified approximate solutions can easily lead to either uneconomical or unsafe design. For this reason investigations on the safety against hydraulic heave have been carried out at the Chair of Geotechnical Engineering at RWTH Aachen University. Based on the results of numerous calculations dimensionless design charts have been generated. With the help of these design charts the required embedded length T can be determined quite easily taking into account the difference of the ground water level H, the Thickness of the aquifer S, the geometrical dimensions B and L of the excavation and the unit weight of submerged soil γ′. In addition to these design charts a formula has been developed. By use of this design formula the required embedded length can directly be determined taking into account the before mentioned boundary conditions.

scholarly journals Thickness–radius relationship and spring constants of cholesterol helical ribbons

2009 ◽  
Vol 106 (37) ◽  
pp. 15663-15666 ◽  
Author(s):  
Boris Khaykovich ◽  
Natalia Kozlova ◽  
Wonshik Choi ◽  
Aleksey Lomakin ◽  
Chintan Hossain ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Spring Constant ◽  
Surfactant Mixtures ◽  
Quantitative Phase ◽  
Phase Microscopy ◽  
Biological Objects ◽  
Quadratic Relationship ◽  
Spring Constants ◽  
Geometrical Dimensions

Using quantitative phase microscopy, we have discovered a quadratic relationship between the radius R and the thickness t of helical ribbons that form spontaneously in multicomponent cholesterol–surfactant mixtures. These helical ribbons may serve as mesoscopic springs to measure or to exert forces on nanoscale biological objects. The spring constants of these helices depend on their submicroscopic thickness. The quadratic relationship (R ∝ t2) between radius and thickness is a consequence of the crystal structure of the ribbons and enables a determination of the spring constant of any of our helices solely in terms of its observable geometrical dimensions.

scholarly journals Modeling the Air Flow Cooling Process and Determining the Geometric Dimensions of the GASK Model

2021 ◽  
Vol 2096 (1) ◽  
pp. 012200
Author(s):  
I V Zaychenko ◽  
V S Sokolova ◽  
S A Gordin ◽  
V V Bazheryanu
Keyword(s):  
Pressure Drop ◽  
Gas Flow ◽  
Pressure Ratio ◽  
Air Flow ◽  
Gas Jet ◽  
Gas Flow Rate ◽  
Special Design ◽  
Cooling Process ◽  
Geometrical Dimensions

Abstract The article is devoted to the calculation of the parameters of the air flow cooling process and the determination of the geometrical dimensions of a model of a gas-jet apparatus of a special design with a gas flow bifurcation (GASK). The article discusses the device and the principle of operation of the GASK, calculates the dependences of temperature on the pressure drop, gas flow rate on the gas pressure ratio. The calculated parameters of the process under consideration and the geometric dimensions of the GASK are given.

On the Influence of Ion Sheaths upon the Resonance Behaviour of a r. f. Plasma Probe

1964 ◽  
Vol 19 (9) ◽  
pp. 1107-1111
Author(s):  
G. v. Gierke ◽  
G. Müller ◽  
G. Peter ◽  
H. H. Rabben
Keyword(s):  
Resonance Frequency ◽  
Frequency Shift ◽  
Electron Density ◽  
Thermal Plasma ◽  
Plasma Frequency ◽  
Low Density ◽  
Plasma Probe ◽  
The Difference ◽  
Geometrical Dimensions

The applicability of the r.f. resonance-probe method to the measurement of the electron density in a plasma is investigated in a thermal plasma of low density. The experiments show that in contrast with the investigations published so far, the resonance frequency determined by the r.f. probe does not agree with the plasma frequency but is found always to be lower than this. The difference between resonance frequency and plasma frequency is caused by the ion sheath in front of the probe; the thickness of the sheath determines the amount of the frequency shift. Therefore, the r.f. resonance-probe determination of the electron density is valid only if the geometrical dimensions of the probe environment are taken into account. By the r.f. probe, information on the plasma ion sheath, namely in front of the probe, can be obtained.

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