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Irza Sukmana
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Journal of Engineering and Scientific Research (JESR)
Published by Universitas Lampung
ISSN : 26850338     EISSN : 26851695     DOI : https://doi.org/10.23960/jesr.v4i1.78
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering
The focus and scopes of JESR is on but not limited to Mechanical Engineering and Material Sciences, Chemical and Environmental, Industrial and Manufacturing Engineering, Computer and Information Technology, Electrical and Telecommunication, Civil and Geodetic Engineering, Architecture and Urban Planning, Geophysical Science and Engineering, and other multidisciplinary research. The main criteria for publication are including the originality, scientific quality and interest to the aim and focus. JESR publishes twice a year for June and December editions. We welcome for publication collaborations with organizer of International Seminars, Conferences and Symposiums around the world. We are encouraging authors to submit their manuscript through our online system.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 153 Documents
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Investment Analysis of Heavy Equipments for Cut and Fill Work on Toll Road Construction Project : (Case Study: Trans Sumatra Toll Road Section 3, Bakauheni-Terbanggi Besar) Kustiani, Ika; Syahputra, Reyzanza Anandio; Dasaputra, Andius
Journal of Engineering and Scientific Research Vol. 7 No. 2 (2025)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v7i2.256

Abstract

Toll roads are vital infrastructure; however, their construction requires significant capital expenditures. One significant cost component is the cost of heavy equipment. The investment schemes considered in this study are cash new purchase, leasing, and rental. The best investment decision requires engineering investment analysis, including the NPV, IRR, BCR, and PP methods. The estimated cost of owning heavy equipment with a cash scheme is Rp 46.06 billion, a leasing scheme is Rp 53.50 billion, and a rental scheme is Rp 66.66 billion. The operating cost for all schemes is the same, amounting to Rp 56.44 billion during the construction period. The financial analysis results show that the cash scheme is the best with an NPV of Rp 9,198 billion, an IRR of 10.39%, a BCR of 1.12, and a PP of 3,3 years. Sensitivity analysis to interest rate increases shows that the cash scheme is feasible up to a 10% interest rate.
Design of a Co-Working Space Building with a Biomimicry Architecture Concept in Bandar Lampung K. Alifah; P. Kurniawan; N. Ifadianto
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.165

Abstract

The economic development in Bandar Lampung is becoming increasingly competitive, leading to higher demand and marketing of office spaces as business actors will need new spaces. Therefore, co-working spaces become a beneficial solution in overcoming these challenges, serving as workspaces and venues for collaboration. However, working continuously indoors can cause feelings of boredom and stress. Several workplace studies show that contact with nature experienced at work or in the office can improve health. One approach is to bring the concept of nature into the building through Biomimicry Architecture by adopting the principles of nature's mechanisms. By adopting these principles, Biomimicry Architecture can also help minimize stress levels for workers in the co-working space; thereby, creating a more comfortable working environment and reducing stress. Based on the analysis and design concepts for the co-working space with the biomimicry architecture concept, biomimicry can address issues related to air pollution by adapting nature's mechanisms. The biomimicry concept in the co-working space applies three principles mass composition, interior layout, exterior layout, skin facade, and utility systems in the building.
Generation Expansion Planning: A Bibliometric Review W. Sunanda
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.198

Abstract

Generation expansion planning is a prominent topic of energy-related scientific discourse. Due to operational constraints, the penetration of renewable energy sources, and uncertainty, there have been numerous changes in the planning of generation expansion. This article provides a bibliometric analysis of recent research on generational expansion planning. Relevant authors, sources, terms, disciplines, and conceptual analysis are used for bibliometric analysis. This bibliometric is based on a Scopus database data set for the years 2013 to 2023.
The Volumetric Performance Analysis and Rutting of PG76 Asphalt Mixture with Fly ash as Filler: Volumetric Performance Analysis and Rutting of PG76 Asphalt Mixture with Fly ash as Filler H. F. Tambunan; B. C. Marina; B. H. Sipayung
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.233

Abstract

Hot asphalt mixture is a type of pavement that is often used in a variety of traffic conditions and diverse environments. Permanent deformation in hot asphalt mixtures is damage caused by ambient temperature, aggregate quality and binding materials. This study shows the effect of using different types of binding materials, asphalt pen 60/70 and asphalt Pg76 with fly ash additives by analyzing the volumetric characteristics and rutting performance of asphalt mixtures. The results showed that the Pg76 mixture had a lower KAO value (6.5%) compared to the 60/70 pen mixture (6.6%). Based on volumetric analysis, the addition of fly ash as a filler has different effects depending on the type of asphalt used, which can be seen from the correlation values of VIM, VMA and VFB >0.7. The stability of the marshall in the PG76 FA mixture has a value of 1686.04 kg and the Pen 60/70 FA of 1407.58 kg. The addition of FA to hot asphalt mixtures can reduce moisture damage with an IRS value of more than 90%. The rutting performance of the PG76 FA mixture has better performance as evidenced by its higher dynamic stability values and lower deformation rate than the Pen 60/70 FA mixture. Temperature has a significant influence on the rutting performance of both mixtures especially in the Pen 60/70 FA mixture. The higher the test temperature indicates the greater the total deformation value, higher deformation rate, and lower dynamic stability in both mixtures.
Impact of Copper (Cu) and Lead (Pb) Conductive Materials on the Radiation Performance of Printed Circuit Dipole Antennas A. C. P. Siregar; A. D. Ardiyanti; A. R. Hilmi; Y. E. Setiawan; N. Tamimah; E. A. Saputro; Purnomo; A. H. R. Inaku
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.239

Abstract

The Fermentation-Destillation Optimization of Palm Juice for High-Content Bioethanol: Literature Review Hasanuddin
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.240

Abstract

The Identification of the Way Ratai Geothermal System and Menanga Fault Through Derivative Analysis and 3D Modeling of Gravity Data: Case Study in Tanggamus Regency, Lampung Ilham Dani; Virna Amelia; Rifanny Dwi Anwar; Nayla Julita Putri
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.250

Abstract

The gravity method is one of the most commonly used geophysical exploration methods for deep ground structure, especially in the geothermal prospect area. In this study the Way RataiGeothermal System and Menanga Faulthave been successfully identified in PesawaranRegency, Lampung Province using full Bouguer anomaly informations. The interpretation process was also performed through the First Horizontal Derivative (FHD), besides the Second Vertical Derivative (SVD) to emphasize anomalies whilst mapping density contrast limits related with fault and fracture-zones. The subsequent step was to predict the rock density distribution and to assist in interpreting the subsurface geology, 3D modelling was conducted. Results of interpretations show a low density area related to the Way Ratai geothermal system and linear anomaly patterns, which are believed to correspond the Menanga Fault. These results indicate that there are permeable bodies which act as pathways for the hydrothermal fluids to migrate. The tectonic control has been proved to be the significant preparation mechanism for geothermal system. In general, it has proved that the derivative or 3D modeling of the gravity method would be viable in geothermal survey.
Jr Thermal Comfort Analysis of Design Element in El’s Coffee Roastery Building Bandar Lampung: A Case Study of the Use of Glass Facades in a Tropical Climate : A Case Study of the Use of Glass Facades in a Tropical Climate A. F. abdullah; D. Lisa
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.254

Abstract

Indonesia's tropical climate, characterized by high humidity, hot temperatures, and intense solar radiation year-round, demands a more adaptive and thoughtful architectural design approach. In this context, building designers need to consider the balance between aesthetics and thermal comfort for space users. The use of glass, for example, can provide abundant natural lighting and enhance a building's visual character, but it can also increase the heat load of interior spaces if not equipped with appropriate mitigation strategies. Therefore, implementing effective air circulation, such as air conditioning devices, shading devices, and reflective protective coatings, is crucial to reducing excess heat. Facade design that is responsive to tropical climates is key to achieving optimal building performance. This study examines the thermal comfort analysis and application of architectural design elements to the El's Coffee Roastery building in Bandar Lampung, with a particular focus on the function and quality of the glass facade as a key element influencing the building's appearance and performance in a tropical climate.
Identification of Hydrocarbon Prospect Zones in The AI-1 Well, The Central Sumatra Basin R. C. Wibowo; A Irawan; O. Dewanto
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.257

Abstract

The Central Sumatra Basin is one of the largest hydrocarbon producing back arc basins in Indonesia. Determining the hydrocarbon prospect zone in this basin uses the well logging method and petrophysical analysis which is carried out to determine rock physical parameters such as shale volume, porosity, water saturation, net reservoir and net pay in the Menggala Formation and Pematang Formation as well as to validate the hydrocarbon content so that a value can be obtained. net (net pay) which is able to describe the thickness of the reservoir. In this research, 4 hydrocarbon prospect zones were found in the Menggala Formation at a depth of 5962.32-6125.03 feet and in the Pematang Formation there were 5 hydrocarbon prospect zones at a depth of 6142.39-6444.12 feet. In the Menggala Formation, the physical parameters of the reservoir rock were obtained, namely shale volume values of 15.1%-24.7%, porosity of 15.84%-18.07%, and water saturation of 29.15%-35.18. Meanwhile, in the Pematang Formation, the physical parameters of the reservoir rock were obtained, namely shale volume values of 4.13%-21.72%, porosity of 16.93%-19.04%, and water saturation of 28.83%-34.04%. These two formations have good quality porosity and the fluid type is gas. Based on the final results of the petrophysical analysis, it can be seen that the prospect zone in the Menggala Formation and Pematang Sumur AI-1 Formation of the Central Sumatra Basin as a whole is a hydrocarbon zone. This is because most prospect zones have a net gross value close to 1.
Spatial Analysis of Landslide Vulnerability Using Weighted Overlay Based on GIS in Balik Bukit Stefano Wahyudi; Azizah Dea Putri; Liana Sinaga; Aprido Lumbanraja
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.260

Abstract

Balik Bukit District in West Lampung Regency is an area with high susceptibility to landslides, which are difficult to predict and pose significant threats to human safety. This study aims to comprehensively map landslide vulnerability zones as a foundation for mitigation strategies. The method used is the Weighted Overlay approach based on Geographic Information Systems (GIS), analyzing eight triggering parameters: slope steepness, slope aspect, slope length, lithology, distance from faults, soil type, soil depth, and rainfall. The research produced a risk map classifying the study area into three categories: low risk (4,878.442 ha), moderate risk (8,487.104 ha), and high risk (1,230.959 ha). Slope steepness was identified as the most dominant factor. This map is expected to serve as a strategic guide for the government and local communities in developing adaptive spatial planning and more effective disaster mitigation plans.

Page 15 of 16 | Total Record : 153

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