pressure factor
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2021 ◽  
Vol 4 (2) ◽  
pp. 224-234
Author(s):  
Andi Nova ◽  
M Alif Hamzah ◽  
Andrew Rinaldi Sinulingga ◽  
Guntur Firmansyah

Football is a popular sport that is loved by all levels of society and throughout the world. A football match always engages a referee who enforces the game to oversee the course of the game consisting of the head referee and assistant referee. This article discusses the level of anxiety of the C-3 soccer referee at the PSSI Askot Langsa City, which amounted to 26 people. The research method used is descriptive quantitative with a survey approach. This study was to figure out information on the anxiety level of the C-3 referee while leading the match; the results showed 17 referees with a percentage of 65% in the high anxiety category and nine referees with a portion of 35% in the very high category. Factors that affect the referee's anxiety are the audience pressure factor. The high atmosphere of the match when the home team is competing and the human error factor from the referee itself is appeared because the referee hesitates in making decisions so that the same mistakes are repeated by head referee and assistant referee during a match underway.


2021 ◽  
Vol 3 (7) ◽  
pp. 10-18
Author(s):  
Farihana A.Rahman ◽  
Syarfadila Ezurida Shaari ◽  
Brenda Anak Norbert Rabar

Sago is the staple food of Melanau in Sarawak. Sago is sourced from Pokok Rumbia or known as Pokok Sagu which is widely found in the interior of the forest. Pokok Rumbia is a kind of palm tree found in Malaysia and Indonesia forests. Among the products of sago trees is wet sago starch or ‘Lemantak’. Wet sago starch is still traditionally produced by Small and Medium Enterprises (SMEs). By utilizing the compressed air produced using the single-acting cylinder from a pneumatic system, the sago starch is compressed with 1.5 horsepower. Through careful selections of concepts, the final selected concept was fabricated and analysed. Machine efficiency analysis is determined by taking into account the compressor pressure factor, the time taken for compression, the height of wet sago starch, and the rate of production at a given time. It is proven that with the implementation of the process through the new machine concept, the productivity of ‘Lemantak’ has increased by 68% compared to the conventional method of production.


Author(s):  
Mr Suryakant ◽  
Shravan Vishwakarma ◽  
Jitendra Mishra

The main objective of this work is to design a concentric three-cylinder heat exchanger for better heat movement, using a sum of four expansions to verify its hot presentation under similar boundary conditions. For this reason, the second creep condition is specified for robust dividers where the heat flow for the outer side divider is concentrated to achieve an adiabatic state while the dividers and inner vanes of the cylinder are coupled. The deltas for the outside and inside of the line are characterized as mass flow trees; The power source is marked as an outlet with a pressure factor. Flow programming is used to determine the movement of liquid and heat flow in the measurement zones. The applicable conditions are governed iteratively by the limited volume details with the SIMPLE calculation. The RNG-k-epsilon model is used for storm currents because the impact of eddies on strong currents is more accurate than the standard k-epsilon model and the second booster graph method is used for the deflection of the eruptive energy and the its propagation speed. The results show that computer examination of the liquid elements of a concentric three-tube heat exchanger with inclined scales at 45 ° C provides the circulation temperature, the speed of heat movement, and, in general, a coefficient of thermal movement. more than 11.74% higher than sloped blades are at 30 ° C and 28.96% higher than straight stairs, 9mm high and 42.22% higher than three tube heat exchangers concentric fins.


2021 ◽  
Author(s):  
A. Gadomski ◽  
P. Bełdowski

Articular cartilage is a natural tribochemical device just-designed by nature. Yet, a vivid debate goes on toward the mechanisms by which its nanoscopic viscoelastic properties facilitate lubrication in terms of ultralow static and kinetic friction coefficients. In this concisely conducted conceptual discussion, we wish to point out that a nanoscale tribomechanistic description based upon certain “viscoelastic quanta”, called fractons, expressing spectral-mechanical properties of viscoelastic nets under the influence of force/pressure factor(s), may contribute substantially to the elucidation of ultralow coefficients of friction in the articular cartilage of predictable relaxational response. Our example unveils a part of a mechanically responsive viscoelastic network, such as a tied piece of hyaluronan molecule, fit in an Edwards type tube, in which upon water–mediated interaction of lipids with the hyaluronan when subjected to loading at the nanoscale, a consecutive stress-field and ion diffusion action is going to occur simultaneously. It results in a natural-logarithmic formula that interrelates a number of hyaluronan’s interactive residues, N, with certain molecular-elastic (an exponent γ) and surface-to-volume (nano-colloid type) characteristics of around 2/3 to emerge near thermodynamic equilibrium, that is to say after a frictional loading action performed. It enables to relate uniquely a value of the exponent 0 < γ < 1/2 with a virtual tribomicellization scenario of the nanoscale friction–lubrication event accompanied by inevitable tubularmilieu viscosity alterations when the quasi-static friction scenario shows up, preferably with γ → 1/3 from above for large enough N –s. A periodic vibrational super-biopolymer’s mode is exploited, leading to a change in the nanoscale friction-lubrication period from which an opportunity to involve an essential contribution to the (nanoscale) coefficient of friction arises.PACS numbers71.10.+x, 81.30.Fb, 05.70.Fh, 05.60.+w


2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Aishetu Umar ◽  
Aminu Abubakar Hussain

Using an analytical and numerical study, this paper investigates the equilibrium state of the triangular equilibrium points L 4 ,     5 of the Sun-Earth system in the frame of the elliptic restricted problem of three bodies subject to the radial component of Poynting–Robertson (P–R) drag and radiation pressure factor of the bigger primary as well as dynamical flattening parameters of both primary bodies (i.e., Sun and Earth). The equations of motion are presented in a dimensionless-pulsating coordinate system ξ − η , and the positions of the triangular equilibrium points are found to depend on the mass ratio μ and the perturbing forces involved in the equations of motion. A numerical analysis of the positions and stability of the triangular equilibrium points of the Sun-Earth system shows that the perturbing forces have no significant effect on the positions of the triangular equilibrium points and their stability. Hence, this research work concludes that the motion of an infinitesimal mass near the triangular equilibrium points of the Sun-Earth system remains linearly stable in the presence of the perturbing forces.


2021 ◽  
Vol 276 ◽  
pp. 01023
Author(s):  
Chaoqun Feng ◽  
Pei Zhang ◽  
Chengshun Xu ◽  
Xiuli Du

The expression of effective stress proposed by Terzaghi has always been questioned. Many correction formulas are modification of pore pressure term. The pore pressure factor is related to porosity, contact area and other factors. When the particles are in point contact, the expression of the effective stress is that proposed by Terzaghi, while for the surface contact particles, the actual effective stress increases the stress produced by pore pressure passing through the contact surface based on the Terzaghi effective stress. There are many factors that affect the development of contact area and pore pressure, therefore, a series of the drained triaxial tests were carried out on four groups of sand samples with different initial hydrostatic pressures to study the influence of different initial hydrostatic pressures on the effective stress due to the term of contact area (σα). The test results show that the shear strength is increases with the initial hydrostatic pressure under the same effective confining pressure, which indirectly indicates that the initial hydrostatic pressure increases the contact area stress.


Author(s):  
Xun Duan ◽  
Xiaokui Yue

Considering that the solar sail spacecraft working in the Lissajous orbit will be affected by the shadow of the earth or the solar wind, which sometime makes the spacecraft unable to work, we try to use the solar light pressure as the thrust to carry out the Lissajous orbit transfer in advance. Because the solar pressure parameters(cone angle, clock angle and solar pressure factor) will change the position of the libration points, we propose the idea of splicing the old and new libration point manifolds to transfer the escape spacecraft to the new Lissajous orbit to achieve orbit maintenance. The simulation results show that besides changing the cone angle and the solar pressure factor, the clock angle can also achieve orbit transfer, and the influence of the solar pressure factor on the periodic orbit is greater than the other two. This study provides a reference for the solar sail spacecraft in the aspects of periodic orbit transfer, orbit maintenance and avoidance of the earth's shadows.


2020 ◽  
Vol 870 ◽  
pp. 11-19
Author(s):  
Layth Abdul Rasool Al Asadi ◽  
Hussein Shakir Al Bahrani ◽  
Luay Kadhim Al Waeli

Box culverts are the monolithic unit build to pass across railway lines, roadways, etc. earthworks are made to balance the discharge water on both sides. Box takes different types of loads created by a cushion, traffic, water, soil, etc. This paper deals with the optimum design of box culvert by using Newton's-Raphson Method and AppDesigner in MATLAB Software R2017a and studies the design parameters such as the influence of depth of earth fill at the top slab of the culvert, earth pressure, factor Dead Load, Live load, effective width, etc. In this paper, the study of the box-culvert with normal and minimum cushion analyzed for different classes of loadings and conclusions made on the basis of Newton's-Raphson Method normal and minimum cushion and normal cushioning cases.


2020 ◽  
Vol 1 (4) ◽  
pp. 287-300
Author(s):  
Siswantoro Siswantoro ◽  

Purpose: The purpose’s study was to understand whether the three factors of pressure (financial stability, financial target and external pressure) and company size can influence financial statement fraud. Research methodology: The data analysis method used logistic regression analysis, and the analysis tool is SPSS v21. The population in this study were 40 banking companies listed on the IDX with a research time of 3 years, from 2017-2019. The total sample was 99 samples. Results: One of the three pressure factors, namely financial targets, had a positive and significant effect on fraudulent financial statements, while financial stability and external pressure had no positive and significant effect. Company size is not able to influence financial statement fraud. Limitations: This research used only four independent variables and the pressure factor dimensions of fraud theory to predict that effect on fraudulent financial statements and only examines one object, namely banking companies. The period of the study is relatively short, only three years. Contribution: The results of this study are useful for principals to be more selective in choosing companies to invest in. Keywords: Fraudulent financial statements, Financial stability, Financial target, External pressure, Company size


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