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Syafii
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LPPM Universitas Andalas Gd. Rektorat Lt. 2, Kampus Limau Manis, Padang 25163, West Sumatra, Indonesia
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Andalasian International Journal of Applied Science, Engineering, and Technology
Published by Universitas Andalas
ISSN : -     EISSN : 27970442     DOI : https://doi.org/10.25077/aijaset
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering
The Andalasian International Journal of Applied Science, Engineering, and Technology (AIJASET) is an international journal dedicated to the improvement and dissemination of knowledge on applied science, engineering and technologies including energy, environment, industrial, agriculture, civil, transportation, Information and communication and other related sciences and engineering. AIJASET follows new trends and advanced technology for practical applications of appropriate technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 1 No. 2 (2021): November 2021" : 5 Documents clear
Experimental Study on Fabrication and Comparison of Mechanical Properties of Plain Weave Copper Mesh Embedded Hybrid Composite with E-Glass Fiber Reinforced Epoxy GFRP Composite Chopra, Ravindra; Kumar, Mukesh; Akhtar, Nahid
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 2 (2021): November 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i02.14

Abstract

This paper presents the experimental study on on GFRP (Glass-Fiber Reinforced Plastic) composite which is fiberglass reinforced with epoxy matrix and find its mechanical properties that can be compared with other hybrid composite which include plain weave copper strips mesh in between the layers of fiberglass in GFRP composite. Both type of composites are made using hand layup technique i.e., placing of chopped fiberglass sheet and then epoxy resin layer by layer, after filling of epoxy and fiberglass at 20% fiber loading which is measured by digital scale, then a pressure is also applied on this sandwich. After 24 hours it is ready to be demolded and after 48 hrs. samples was cuts as per ASTM standards then testing was done on both GFRP and Hybrid composites to find their Mechanical & Physical Properties. Results shows improvement as we introduce plain weave copper strips mesh in between the GFRP laminate to make it hybrid.
Audits for the Use and Strategic Of Energy Efficiency on the Campus Bukit Indah of Malikussaleh University Hasibuan, Arnawan; Siregar, Widyana Verawaty; Ezwarsyah, Ezwarsyah; Kurniawan, Robi
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 2 (2021): November 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i02.16

Abstract

This study aims to determine the right strategy for energy efficiency that can be applied in the campus area. This study uses quantitative methods in a dominant position, while qualitative methods are less dominant. The method of analysis for this study uses Contextual Interaction Theory (CIT) with the characteristics of the implementer and the target group consisting of motives, cognition, and strengths. These variables will be the main points for formulating a basic strategy on energy use at the Faculty of Engineering, Bukit Indah campus, Malikussaleh University. Contextual issues are also external factors that influence and become a consideration in determining the level of energy efficiency efforts on campus. Regarding to CIT measurements which have been analyzed, the score of motives from implementer is -0.33, cognitions +0.50, and power +62. Then, overall for target group get positive score which consist of motives +0.75, cognitions +0.54, and power +0.44. The result of type interaction between two actors point out number 10 which is about obstructive. Apart from that, three contextual issues will also be analyzed that affect the characteristics of actors, namely the specific context, the structural context and the broader context. Strategic planning to pursue energy efficiency at the Faculty of Engineering, Bukit Indah Campus, Malikussaleh University consists of increasing motivation with energy-saving campaigns and awarding prizes. Then, improve cognition with energy audits and socialization of energy efficiency. Finally, increasing strength through the implementation of sustainable policies and programs.
The Effect of Coagulants Variations in the Coagulation Unit on the Efficiency of Raw Water Turbidity Removal Sedimentation Unit Continuous Discharges Flow (CDF) as a New Method Ridwan, Ridwan; Afrianita, Reri; Danir, Resi Meilinta Danir
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 2 (2021): November 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i02.17

Abstract

Variations in the type of coagulant resulted in different floc characteristics. The sedimentation unit with continuous discharges flow or (CDF) method is a sedimentation unit that applies the leaking tank phenomenon, so it is possible that it will affect the condition of the floc that has been formed and in the end can affect the efficiency of turbidity removal. This study was to determine the effect of the type of coagulant in the coagulation unit on the removal of raw water turbidity in the sedimentation unit using the CDF method with a 6% discharge ratio to the product discharge. The raw water used is Sungai Batang Kuranji water with a turbidity of 27.63 NTU. The experimental reactor consisted of a coagulation-flocculation unit and a sedimentation unit with various coagulants being Poly Aluminum Chloride (PAC), Ferric Chloride, and Alum. The results showed that the efficiency of removing turbidity from the Sungai Batang Kuranji by PAC coagulant was 90.12%, Ferric Chloride 86.99%, and Alum 81.72%. The Spearman correlation value of the coagulant variable on the efficiency of the removal of turbidity is 0.948, indicating a unidirectional effect between the two variables. The addition of 6% CDF flow in the settling zone did not break the floc because the flow formed was still laminar.
Measurement of Mental Workload Against Packing Operators at UKM Roti Heppy Bakery Padang Using the NASA-TLX Method Fithri, Prima; Syahfikri, Naufal
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 2 (2021): November 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i02.18

Abstract

In this increasingly advanced era of globalization, more and more manufacturing and service companies are developing which brings intense competition for companies to be able to maintain the company's establishment. IKM Heppy Bakery is one of the bread production companies that is experiencing this competition. For the realization of companies that can compete in the era of globalization, highly competent resources are also needed. The impact of this competition causes more work demands and causes workload effects both physically and mentally on employee performance. Based on this, a mental workload study was conducted to determine the amount of mental workload of employees using the NASA-TLX method. Based on calculations using the NASA-TLX method, it was found that the level of mental workload on bread packaging at IKM Heppy Bakery was included in the very high category with 4 workers having a very high workload category and there were also 2 workers with a high workload category. The average WWL score on bread packaging is 82. For this condition, it is deemed necessary to have an evaluation accompanied by an improvement in the work system or reward to foster motivation and enthusiasm and reduce stress for Heppy Bakery's bread packaging employees.
Effect of humidity and contaminants on dry band formation in Outdoor Distribution Current Transformer 20 kV Zaputra, Satia
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 1 No. 2 (2021): November 2021
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v1i02.23

Abstract

This study reports the effect of humidity and pollutants on the formation of dry band phenomena on the insulation surface of an outdoor 20 kV distribution current transformer. From the results of measurements at high humidity 95% and high conductivity 36 mS/cm at a working voltage of 2-20kV test there is a change in the curve of increasing the value of the leakage current which is very volatile. Wet layer of impurity will cause a drastic decrease in surface resistance resulting in a large increase in leakage current. At a high conductivity of 36 mS/cm, the results of the measurement of surface resistance at low humidity of 55% worth 30.2 giga ohms decreased to 2.1 giga ohms at high humidity of 95%. While the value of the leakage current curve is very fluctuating from the value of 206 - 678 A at high conductivity with heavy pollutants. This information confirms the hypothesis that the boundary region of the two air-solid dielectrics of the epoxy resin causes surface discharge problems in dry band formation due to an increase in the non-uniform local electric field in the impurity layer adhering to the surface of the distribution current transformer. Keywords : leakage current, dry band, surface discharge, contaminants

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