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ARPN Journal of Engineering and Applied Sciences                               April 2020  |  Vol. 15  No. 8
   
Title: Experimental silo controlled by Programmable Logic Controller - PLC
Author (s): Faiber Robayo Betancourt, Gilma Paola Andrade Trujillo and Angelo A. Reyes Carvajal
Abstract:

This work presents the design and implementation of an experimental silo controlled by a PLC (Programmable Logic Controller). The main contribution of this work is to provide a new tool in the control area and industrial instrumentation applied to a silo. A variety of sensors, motors, and electromechanical elements are implemented. The structure is metallic and consists of a conveyor belt made of rollers through which a grain container is moved. The PLC configuration and programming were executed by the Connected Components Workbench (CCW) software and the graphical interface was performed in LabVIEW programming. As a result, an experimental tool for the industrial process automation practice applied to silo was developed.

   

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Title: Study about level of railway road damage railways with sustainable PCI method
Author (s): Syaiful Syaiful and Lian Lasmana
Abstract:

Assessment of road surface conditions is one step to determine the type of revaluation program that needs to be done. The method used is Method pavement condition index (PCI). This study aims to obtain the results of pavement value evaluation and follow-up plan to be taken. The data used are observation data on location, the sequence of data processing starting from determining Damage Level, Hardening Condition Conditioning, and Classification of Pavement Quality, PCI value index consists of 0 to 100. Evaluation of road condition condition of Mayor HE Sukma Rd with PCI method resulted in 64% PCI value included in good category, but in samples there were 3.33% blow up damage, 13.33% corner break, logitudinal, tranverse, and diagonal cracks 23,33%, durability cracking 3,33%, patching large and utility cut 13,33%, scalling 3,33%, spalling tranverse and longitudinal joint equal to 13,33%. The follow-up plan that can be taken on the basis of the highest density of cracks is logitudinal, tranverse, and diagonal with cracking improvements exceeding 3 mm needs to be cleaned and filled with asphalt to prevent water infiltration into cracked cracks, if the cracks exceed 5 mm return the plate locally.

   

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Title: Accelerated convergence of numerical solution to square plate bending problem
Author (s): Mikhail Ivanovich Popov, Aleksey Vasilyevich Skrypnikov, Vyacheslav Gennadievich Kozlov, Dmitry Gennadievich Kozlov, Petr Viktorovich Tikhomirov, Vadim Yurievich Bukreev, Maksim Aleksandrovich Abasov and Victor Anatolyevich Khvostov
Abstract:

The paper presents a numerical solution to the problem of bending a square plate clamped along periphery by the classical finite difference method. The obtained solution is improved using the Richardson extrapolation method, which allowed to reduce the absolute error of the solution by 4 orders of magnitude. A step-by-step construction of an implicit finite difference scheme of the second order of accuracy for an inhomogeneous biharmonic equation under zero boundary conditions on the desired function and its gradient is presented. The classical and modified Richardson extrapolation methods are considered on the sequence of grid functions. The extrapolated solutions are presented as a linear combination of grid functions in common nodes with weight coefficients. Computational experiments for the test function were carried out using the Maple computer environment. Solutions of the problem for different grid steps are obtained. The dependence of the calculation time error on the number of significant digits is revealed. The optimal number of significant digits is found. The rate of convergence of the classical finite difference method is investigated. The analysis of convergence acceleration using the classical and modified Richardson extrapolation method is carried out.

   

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Title: Use of probabilistic methods for design of CLT panels
Author (s): Pavel Dobeš and Antonín Lokaj
Abstract:

The paper deals with the use of probabilistic methods for determination of the stiffness and load-carrying capacity of CLT panels. CLT panels are large-format building components composed of cross-oriented solid timber layers. The panels were experimentally tested using a four-point bending test, where a load-deformation curve was recorded. The results of the experimental testing entered into the probabilistic calculation as random variables and they were then compared with an analytical calculation a values given in Eurocode 5.

   

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Title: Pressure derivative analysis for radial or linear geometries composite reservoirs
Author (s): Freddy H. Escobar, Francisco José Amado and Faiber Robayo
Abstract:

A new methodology for pressure-transient well test interpretation in both linear or radial geometry composite reservoirs is presented here. For this, expressions of the unified behavior and trend correlations from the maximum and minimum points of the pressure derivative curve observed during the transition period between the two regions that compose the reservoir are developed for the determination of diffusivity ratio and mobility. The results obtained in both cases with the developed equations and correlations provided excellent results which match very closely the input ones, and, therefore; with a very low deviation error as illustrated by the synthetic examples.

   

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Title: Development of solar power plant for fish cooling in the fisherman ship
Author (s): Yulianus Songli, Kristiana Pasau, Agustina Kassa and Corvis L. Rantererung
Abstract:

Indonesia as a maritime country that most of its territory is the sea and is located right in the equatorial region with abundant potential of solar energy and marine fish. So far, fishermen using fishing boats are very wasteful because they use two engines, the boat engine and the engine generating electricity on the ship. The operational costs of fishermen going out to catch fish and transport fish are very high, resulting in poor and marginal fishermen. This study aims to provide solutions for fishermen to utilize solar energy as a source of electrical energy for fish cooling and lighting on fishing boats at night.

   

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Title: Study of the reaction of polysorbate-20 with heteropolyacids of the Keggin structure by the photometric method
Author (s): Mironyak M. O., Volnyanska O. V., Manzuk M. V., Labyak O. V., Nikolenko M. V., Kovalenko V. L. and Kotok V. A.
Abstract:

In this work, the effect of acidity of the working solution on the properties of polyoxyethylene monosorbitan laurate was investigated by a spectroscopic method. Since the substance under study does not absorb light waves in the visible region of the spectrum, the study was conducted in the ultraviolet region. The effect of solution pH on the reaction of the interaction between polysorbate-20 and barium salt to form a cationic particle of polysorbate-barium was also studied by spectrophotometric method. The possibility of reaction between the obtained cationic particle of polysorbate-barium and the anions of 12-molybdophosphate and 12-tungstenphosphate heteropoly acids was investigated and the nature of the bond in the obtained compounds was determined. The composition of the complexes and the ratio of the components were determined by the saturation method at a wavelength of 265 nm. The results of these studies can be used in the development of a new method for the determination of polysorbate-20 in industrial products ionometric method using potentiometric sensors reversible to polysorbate-20.

   

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Title: Prediction of sitophilus oryzae gender using Logistic Regression model
Author (s): Tun Mohd. Firdaus Azis and Khairul Farihan Kasim
Abstract:

Sitophilus oryzae gender been discriminated using rostrum size and confirmation required the dissection of internal reproductive organ. This dissection technique is destructive and difficult to perform. Thus, the objective of this study is to enhance gender identification process by developing the model using Logistic Regression. This model been develop based on the numerical information of S. oryzae morphological features per se. The results show that rostrum measurement (length and width) was adequate to be used in developing a model for identification and prediction of S. oryzae gender with 100% correct classification.

   

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Title: Effect of carbon-nitrogen in the native Beauveria Bassiana production by solid fermentation in Ecuador
Author (s): Oderay Merino-Peñafiel, Jesús Chávez Machado, Favian Bayas-Morejón, Angélica Tigre-León, Myriam Merino, Moises Arreguín and Andrea Román
Abstract:

The purpose of the work was to produce native Beauveria Bassiana conidia at the laboratory level through Solid State Fermentation (SSF), polypropylene sleeves were used as bioreactors. The pre-cooked and sterilized substrates were: "recycled" rice and wheat, supplemented with various carbon-nitrogen sources (C-N), ratio 10: 1. The experimental design was a Categorical Multi-Factor, with 20 treatments and three repetitions to determine the variable concentration of conidia/g of bioproduct; the count of conidia was in Neubauer chamber. The mean values of controls were 1.15 × 109 Conidia/g in rice and wheat 1.22 × 109 Conidia/g with C-N supplements, the highest means of B. Bassiana in rice was 1.89 × 109 Conidia/g (T7); in this same order in wheat 1.90 × 109 Conidia/g (T17). The lowest means presented: T10 and T20 (between 1.05 - 1.06 × 109 Conidia / g), in rice and wheat with molasses-yeast, concentration 2 (5.0-0.50 g), possibly due to an antagonistic effect between Saccharomyces cerevisiae-entomopathogenic fungi (EPF) during its cultivation. The ANOVA registered significant statistical differences (*) at = p 0.05 in the factors C-N, and concentration. The Multiple Range Contrast LSD-Fisher, determined that there were no (*) between any pair of means at 95.0% confidence. It is concluded: the supplementation of C-N on rice and wheat for the mass production of B. Bassiana, influenced the yield of conidia/g of the bioproduct.

   

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Title: Determination of ground water quality index in coastal area of Mumbai
Author (s): Jyoti J. Nimje and A. S. Wayal
Abstract:

Ground water quality can be adversely affected or degraded as a result of human activities that introduce contamination into the environment. In industrial and coastal location, the saline water intrusion resulted in contamination of the potable ground water aquifers. The influence of environmental parameter on the water quality of ground in coastal region which is crucial issues as water availability and its use for various purposes. Assessment of Ground water quality status was done by using water quality index method, which is an effective tool to assess spatial and temporal changes in ground water quality. Various parameters were selected as indicators of the groundwater quality which include pH, Hardness, Chlorides, Sulphate Dissolved Solids, Calcium, Alkalinity, Magnesium and Metals etc. to determine water quality index. The monitoring of ground water quality was done on the basis of experimentation by standard sampling methods, for different locations for consecutive three years from 2016 to 2018. The present study intends to calculate water quality index (WQI) of the coastal ground water.

   

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Title: Investigation of local scouring and sediment patterns around the solid and hollow pillar
Author (s): Ishak M. Galib, Saparuddin, Herman Rudi and Arafat Yassir
Abstract:

The existence of a bridge pillar on a river body can cause changes in flow characteristics such as flow patterns to change into the spiral flow or greater turbulence, changes in water flow velocity cause changes in all hydraulic systems so that the change in depth of local scours around the pillars on a bridge. Local scouring occurs due to flow velocity greater than the critical velocity of the sediment. The shape of the pillar is very influential on the depth of scouring, scouring occurs when changes in flow conditions are caused by an increase in the basic shear stress. The purpose of this study is to determine the effect of pillar shape on the scour depth, sediment scours pattern, and the most shallow scoured pillar shape. The tool used is a flume with a length of 15 m, width 1 m and height of water adjusted to the needs. The research method is by testing the depth of scouring on pillars in the form of round and triangular nose pillars, and hollow and triangular round nose pillars, velocity used are fixed, with different water heights so that different Froude and Reynolds numbers are obtained, the velocity is designed based on the principle that local scouring occurs continuously and the sediment transport process does not occur, the basic sediment material used passes filter number no. 10 (2 mm) and retained no. 20 (0.85 mm). Of the six types of pillars used the most shallow scour is a hollow pillar with a hollow nose tilted inward the scouring value obtain of K1 = 0.6, in general, that hollow pillars are scoured smaller than intact pillars, while the sedimentary pattern formed around the pillars is for nasal scours triangular pillars are more centred around pillars, while pillars are with a more spread round nose.

   

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Title: A proposed modified text steganography technique using UniSpaCh with XOR encryption and shift cipher
Author (s): Raka Adinugraha, Tito Waluyo Purboyo and Randy Erfa Saputra

Abstract:

Nowadays, security on communication was a necessity. However, sending an encrypted message can draw a suspicion from unintended parties. So, sometimes cryptography doesn’t guarantee a full security because it could attract attempts to break and reveal the encrypted message. Steganography was introduced as a method to secure a secret message by hiding it inside an unsuspicious message. The message can be plain text or other data that can be represented as streams of bits. Many of steganography techniques are being proposed from time to time, means steganography is a promising method to secure a communication line beside cryptography. In this paper, an experiment is conducted by comparing two text steganography techniques, which is UniSpaCh and a steganography technique by altering the foreground color of an invisible character.

   

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