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Arjuna Subject : Umum - Umum
Articles 313 Documents
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PERFORMANCE EVALUATION OF HEAVY EQUIPMENT IN THE JAKARTA LRT PHASE 1B PROJECT BILHAN GAMALIEL HARTANTO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
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Abstract

Infrastructure projects, particularly in the development of mass transportation systems such as light rail transit (LRT), are highly dependent on the role of heavy equipment. The use of heavy equipment is a determining factor in the success of specialized rail transportation development, where the production capacity of heavy equipment plays a major role in influencing project progress. Therefore, an analysis of production volume capacity is essential. This study aims to evaluate production volume capacity in the Jakarta LRT Phase 1B project, including an analysis of the capacity of cranes, excavators, dump trucks, compactors, and other heavy equipment. Volumetric methods were applied to calculate the volume capacity and productivity of heavy vehicles. The analysis results show that the calculated volume and productivity of heavy equipment have met the targets in accordance with the established schedule.
ANALYSIS OF CONCRETE COMPRESSIVE STRENGTH AGAINST BAMBOO FIBER WASTE FARHAN HAWARI; GALI PRIBADI; YONAS PRIMA ARGA RUMBYARSO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
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Abstract

Concrete is a primary construction material consisting of a mixture of cement, water, sand, and aggregate, and often includes additives to improve specific properties such as workability, durability, and setting time (McCormac, 2004). Bamboo fibers, which have a compressive strength of 45.4 MPa (Afdal, 2016) and contain hydroxyapatite (HA), are used as an additive in concrete to improve performance. This study tested the compressive strength of normal concrete and concrete with bamboo fiber variations of 2%, 4%, and 6% at ages of 7, 14, and 28 days, each with two samples per variation (total of 24 test specimens). The test results showed that at 7 days, the 6% variation exhibited the highest compressive strength increase (20.42 MPa) compared to normal concrete (16.37 MPa). However, at 14 and 28 days, only the 6% variation again showed an increase in compressive strength (22.64 MPa), while the 2% and 4% variations tended to decrease compared to normal concrete.
THE ROLE OF ARTIFICIAL LIGHTING AND INTERIOR MATERIAL SELECTION IN THE COMFORT OF VISITORS TO TANATAP CAFÉ IN BEKASI ASTRIA MELANIRA
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
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Abstract

Currently, there has been significant growth in cafes in Indonesia, highlighting the demand for variety and thematic elements. Cafes serve as social hubs for relaxation after daily routines. Enhancing visual comfort is crucial for visitor satisfaction. Artificial and natural lighting play a significant role, especially at night, adhering to established standards for optimal visual comfort. The research methodology in this study employs data collection techniques through questionnaires and observations. The sampling method used is random sampling. The results of the observations and questionnaires examined visitor comfort in artificial lighting and interior materials, with a focus on the case study of Tanatap Coffee Bekasi. Tanatap Cafe highlights its design and artificial lighting system, creating a warm and natural atmosphere with attractive interior materials, thereby enhancing visual appeal for visitors.
RISK MANAGEMENT STRATEGIES ON HIGH-RISE BUILDING PROJECTS IN THE INDONESIAN CONSTRUCTION INDUSTRY Faizal Addin Achmad
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 4 No. 02 (2024): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2024
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The high-rise building construction industry in Indonesia faces technical and non-technical risks such as work safety, delays, cost overruns, and contract conflicts. This research examines risk management strategies in high-rise building projects with reference to ISO 31000 in the BTN Bank Building project in the Kelapa Gading area of North Jakarta, through literature studies and analysis of actual project cases in Indonesia. The results show that the initial stages of risk management have been implemented, but full implementation is still not optimal. The main risks include delays in material supply, work accidents, and limited human resources risk experts. Mitigation strategies implemented include avoidance, risk transfer, and impact reduction. The main barriers are reactive organizational culture, lack of documentation, and limited management support. This research recommends the integration of risk management in the project management system and the improvement of HR competencies to increase project success and construction industry efficiency.
FUZZY CALCULUS: A COMPREHENSIVE LITERATURE REVIEW Efendi; Admi Nazra; Mahdhivan Syafwan; Haripamyu
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
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Abstract

This report presents a literature review on Fuzzy Calculus, a field that emerged from the integration of classical calculus with fuzzy set theory. Classical calculus, although fundamental for modeling precise systems, has limitations in dealing with the uncertainty and ambiguity inherent in real-world phenomena. Fuzzy calculus extends the concepts of derivative and integral to the fuzzy domain, enabling modeling of dynamic systems involving uncertain variables. This report outlines the basic concepts, methodologies of fuzzy differentiation and integration, and highlights significant opportunities in dynamic systems modeling, optimization, control systems, artificial intelligence, and various cross-disciplinary case studies. In addition, theoretical and practical challenges including unique operation definitions, lack of standardization, result interpretation issues, and computational complexity are discussed. Finally, it presents future research directions of Fuzzy Calculus in the face of complexity and uncertainty in the modern world.
ANALYSIS OF ABILITY DIGITAL LITERACY FOR LIBRARIANS AT SURABAYA STATE UNIVERSITY LIBRARY Najwa Wahyu Aqila; Bakhtiyar; Bambang Prakoso
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
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Abstract

Development technology very rapid information has change face library become center service digital information. Librarian No Again only on duty in service physical , but also required For own ability digital literacy which includes access , evaluation , creation , reflection , and participation information in a way critical and ethical research​ This done For know to what extent is the ability digital literacy of librarians at the UPT Library of Surabaya State University (UNESA), with use five element theory digital literacy from Renee Hobbs (2010), namely access, analyze, create, reflect, and act. Research This use approach qualitative descriptive. Data collection techniques are carried out through interview deep against five librarians from various field services, namely collection work scientific, references and publications periodically, two of circulation, as well as automation and conservation. Data analysis was performed using the Miles, Huberman, and Saldaña model which includes stage data reduction, data presentation, and data extraction conclusion. Research results show that ability librarian in access and analyze aspects are in the category good, but the ability in the aspects of create, reflect, and act is still diverse and yet evenly. Some librarian Not yet active make digital content, not yet in a way consistent reflect mark ethical in management information, and minimal involvement in public digital spaces. It is necessary training digital literacy in general comprehensive, collaborative between divisions, as well as support policy institutional so that librarians can play a role as agent digital literacy in environment academic.
THE USE OF BLACK BAMBOO AS A SUBSTITUTE FOR COARSE AGGREGATE TO INCREASE CONCRETE COMPRESSIVE STRENGTH Dohar Sinabutar; Yonas Prima Arga Rumbyarso
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
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Abstract

The use of waste as an alternative building material is an effective solution to environmental problems and is popular in developing countries. On the other hand, the concrete industry, a key component of construction, continues to innovate to improve quality and efficiency. The increasing demand for concrete has driven the development of mix designs that meet strict quality and compressive strength standards, while also considering environmental sustainability. Advancements in concrete technology are driving research initiatives to improve the quality and efficiency of its use, with innovations in material selection and implementation methodologies. This aims to meet increasing demands and address construction challenges. Modern concrete is required to perform optimally in shorter timeframes, necessitating effective additives for performance enhancement. Recent research has integrated bamboo waste from the craft industry as a concrete mixture component, accelerating project implementation and providing a sustainable solution for waste management. The author is interested in conducting an in-depth study on increasing the compressive strength of concrete by integrating bamboo waste. The concrete studied has a quality of f´c 25 MPa (K-300) and was tested at 7, 14, and 28 days to assess the effectiveness of bamboo as an additive. The test results are expected to provide significant data on the viability of bamboo waste as a partial substitute for coarse aggregate. The study title, “The Use of Bamboo Waste as a Partial Substitute for Coarse Aggregate to Enhance Concrete Compressive Strength,” reflects the research objectives and the utilization of sustainable materials in modern construction. Based on the results of the research conducted and the discussion in the previous chapter with variations of black bamboo waste at 0%, 10%, and 15%, the following conclusions can be drawn: the compressive strength test results for normal concrete at 28 days reached 452 kN (fʹc 26.1 MPa = 104%), while variation 1 with 10% black bamboo waste showed a decrease in compressive strength, reaching 305 kN (fʹc 17.60 MPa = 70%), and variation 2 with 15% black bamboo waste also showed a decrease, reaching 309 kN (fʹc 17.83 MPa = 71%).
ISLAMIC RELIGIOUS CONTENT ON INSTAGRAM REELS: BETWEEN EDUCATION AND ENTERTAINMENT Iswahyudi Tejo Yuwono
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 03 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2025
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This study explores the phenomenon of Islamic religious content on Instagram Reels, which has rapidly gained popularity as a medium that combines education and entertainment. The rise of short video formats on social media has encouraged preachers, educators, and Muslim content creators to disseminate religious values in ways that are more accessible and engaging to younger audiences. This research aims to analyze how Instagram Reels serves as a hybrid platform where Islamic teachings are not only conveyed through didactic messages but are also packaged in creative, humorous, and entertaining forms. By employing a qualitative approach, the study observes selected Islamic Reels content and examines audience perceptions regarding the balance between its educational value and entertainment appeal. The findings suggest that while the majority of viewers appreciate the creative packaging of religious messages, there remains a tension between maintaining the authenticity of Islamic teachings and adapting them into entertaining formats. For many users, Reels become a means of quick spiritual reflection in their daily routines, yet some also express concerns about oversimplification or trivialization of religious values. This research contributes to the growing discourse on digital religion and media convergence by highlighting the dual role of Instagram Reels as both a pedagogical tool and a source of leisure. Ultimately, the study underscores the importance of balancing da’wah effectiveness with ethical responsibility in producing Islamic content within the dynamic landscape of social media
ANALYSIS OF THE USE OF ZEOLITE AS A SUBSTITUTE FOR SOME OF THE COARSE AGGREGATE IN POROUS CONCRETE TEGUH SIANTURI; LYDIA DARMIYANTI; INDRIASARI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 03 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2025
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Rapid urban development increases water runoff due to impervious areas. Porous concrete is an environmentally friendly solution because it absorbs water and preserves groundwater. This study examines the use of porous zeolite as a partial substitute for coarse aggregate to improve the mechanical and environmental performance of porous concrete, particularly in areas with light traffic and sustainable water management requirements. The compressive strength of concrete with 0% zeolite stone composition reached 18.66 MPa (7 days), 22.60 MPa (14 days), and 25.60 MPa (28 days), exceeding all SNI 2847:2019 requirements. The compressive strength of concrete with 15% zeolite stone reached 16.06 MPa (7 days), 20.82 MPa (14 days), and 22.18 MPa (28 days), but none of them met the minimum limit of SNI 2847:2019. The compressive strength of concrete with 30% zeolite aggregate reached 16.07 MPa (7 days), 20.83 MPa (14 days), and 22.20 MPa (28 days), but none of them met the minimum standard of SNI 2847:2019.
UTILIZATION OF GYPSUM POWDER WASTE AS A SUBSTITUTE FOR PART OF CEMENT IN POROUS CONCRETE COMPRESSIVE STRENGTH AGA PRIATNA; YONAS PRIMA ARGA RUMBYARSO; GALI PRIBADI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 03 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2025
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Porous concrete is used in infrastructure projects that require water absorption, supporting green cities and sustainable development. Its composition differs from conventional concrete because it has minimal or no fine aggregates, thus forming pores. This study aims to compare the compressive strength of normal porous concrete with porous concrete in which some of the cement is replaced with gypsum board waste powder. Testing was conducted at 7, 14, and 28 days to determine the effect of waste on concrete strength development. Compressive strength testing of porous concrete with varying amounts of gypsum powder waste showed that at 0% composition, the results at 7 and 14 days met the SNI 1974: 2011 standard. However, at 5% and 10% composition, the results at 7 days only partially met the standard, while at 14 days they were below the minimum limit of 88%. This indicates a decrease in compressive strength performance as the percentage of gypsum waste increases.

Page 31 of 32 | Total Record : 313

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