CurRent issues

Welcome to IJLERA! International Journal of Latest Engineering Research and Applications

Volume 04 - Issue 04 (April 2019)


Title:
The Design of Experiment : An Optimization of Mortar Mixture Composition with Silica Fume As Partial Replacement For Cement
Authors:
Gagassage Nanaluih De Side, Ni Nyoman Kencanawati, Hariyadi
Source:
International Journal of Latest Engineering Research and Applications, pp 01 - 05, Vol 04 - No. 04, 2019
Abstract:
In an effort to produce better mortar quality, a quality control method is required. The purpose of this research was to determine the proportion of the material with the optimum partial replacement of cement by silica fume to the compressive strength of the 56-days mortar, where the focus of quality control shifted to the earlier stage of product design stage. The further research is needed to determine the actual optimum proportion. This research uses 3 factors, which are the proportion of silica fume, the proportion of sand, and the proportion of cement, for each factor consists of 3 levels, with the content of silica fume is ±20% from weight of cement. Mortar is based on 9 combinations of materials on the orthogonal matrix L9(34) then created with dimensions 50 mm3 cube. The results show that the optimum proportion is 150 gr of silica fume, 660 gr of cement and 1400 gr of sand which is equivalent to replacing 22,7% cement with silica fume, which gain 54,00 MPa compressive strength.
Keywords:
compressive strength, mixture composition, mortar, optimization, silica fume
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Title:
Internet of Things Security Management Policies and Procedures
Authors:
Dr. Abdelrahman Karrer, Mohammed Saif
Source:
International Journal of Latest Engineering Research and Applications, pp 06 - 10, Vol 04 - No. 04, 2019
Abstract:
Internet of thing is an advanced concept in information technology that benefit the society thorough providing solutions for several kinds of problems. Internet of thing (IOT) require strong security system and securities management policies. Considering the importance of security systems, policies and procedures for IOT security management are discussed in detail. In this paper, major components, challenges, and applications of IOT are discussed in the light of information and knowledge collected from research and literature review. Secondary data analysis presented information about the key threats of IOT and FTC policies for security management that is also presented in this paper. After discussing the all challenges and applications of IOT recommendations are presented for security system of IOT. In the light of research, it can be recommended that experts of IOT should follow up the guidelines and policies to avoid security related issues.
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Title:
Comparison of Rules for Reservoir Operation Patterns Based on Needs, Based on Storage (Genetic Algorithms) for Tanju Reservoir Optimization
Authors:
M. Gery Prakarsa Pranatagama. W, Atas Pracoyo, Sasmito Soekarno
Source:
International Journal of Latest Engineering Research and Applications, pp 11 - 26, Vol 04 - No. 04, 2019
Abstract:
The drought (water crisis) in several reservoirs that have been built, arises due to the ineffectiveness of the reservoir operation pattern and the need for water is not linear (linear) with the water availability (inflow). There are several rules that are used as the basis of reservoir operation patterns, namely the rules of operation based on needs and based on storage, limitations in existing operating patterns (needs), generally occur in cases of reservoirs that have no large water availability and fluctuating characteristics of the inflow, consequently the reservoirs frequently go through emptiness and decreased needs, as an example of a reservoir that needs to be optimized is the Tanju Reservoir in Dompu District. The formulation of the problem in this study is to conduct simulation and compare the results of the pattern of reservoir operations with rules based on needs, based on storage and optimization of genetic algorithms. The purpose and benefits of making simulations and comparing the best value of reservoir operation patterns with certain rules with certain inflow conditions is to provide alternative release guidelines so that the fulfillment of Tanju Reservoir needs is more optimal. The method applied in the reservoir operation pattern is the rules based on needs, based on storage and based on optimized storage with genetic algorithms for inflow conditions of wet discharge (Q20), normal discharge (Q50) and dry discharge (Q80). From the calculation of the best value for wet discharge conditions (Q20) is a rule based on needs, normal discharge (Q50), is a rule based on needs and dry discharge (Q80) is a rule based on the storage optimized with genetic algorithms.
Keywords:
drought reservoir, Simulation of Reservoir Operation Pattern, Rules based on Needs, Rules based on Storage, Optimization of Genetic Algorithms.
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