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Journal : journal scientific of mandalika jsm

Sistem Pemanenan Air hujan dengan Metode Roof Harvesting System untuk Kebutuhan Non Domestik Samsul Arifin; Henny Pratiwi Adi; Abdul Rochim
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 6 No. 5 (2025)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol6iss5pp1296-1304

Abstract

The increasing need for clean water in urban areas, including Salatiga City, is a major challenge along with population growth and climate change. One alternative solution is a rainwater harvesting system using the Roof Harvesting System (RHS) method. This study aims to analyze the potential amount of rainwater that can be harvested, determine the optimal capacity of the reservoir, and design a suitable RHS system for non-domestic needs in the KH. Hasyim Asy'ari Building, Campus 3 UIN Salatiga.This study uses a quantitative method with a descriptive approach. The research stages include collecting primary data through direct observation and measuring the roof area. Then collecting secondary data in the form of annual rainfall data and related literature. The last calculation of rainwater potential. The results showed that the roof area of ​​the building was 2,756.81 m², with a catchment area of ​​1,626.89 m², it can capture rainwater with an optimal volume of 9,371 liters/day. Considering the annual rainfall pattern in Salatiga City, the optimal capacity of the recommended reservoir is 6 water tanks with a volume of 1,550 liters each, so the total capacity is 9,300 liters. Non-domestic water needs reach 9,552.68 liters/day, which means that this rainwater harvesting system can meet around 98% of daily needs, with the potential for integration of additional water sources to cover the shortfall. The proposed Roof Harvesting System design includes an initial filtration system, distribution pipe network, and reservoir, with periodic maintenance to ensure the quality of water that can be used for non-domestic needs. The implementation of this system has the potential to reduce dependence on conventional water sources and support the concept of a green campus and sustainable water management.
Evaluasi Optimalisasi Cash Flow Pada Proyek Multiyears Dengan Penyesuaian Perubahan Waktu Pelaksanaan (Studi Kasus Proyek Pembangunan Jalur Kereta Api Lintas Makassar-Pare pare) Andi Bongawali; Henny Pratiwi Adi; Juny Andry Sulistyo
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 6 No. 3 (2025)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol6iss3pp507-516

Abstract

The construction of the Trans-Sulawesi railway line is a railway network built to reach important areas on the island of Sulawesi. In general, the implementation of construction projects is limited by a certain time with limited resources to complete a given job, but due to the unavailability of land when the Work Start Order is issued, it causes a time addendum twice without any cost escalation. The purpose of this research is to get the optimal cash flow that can be obtained by contractors based on changes in implementation time and get the right strategy that can be applied in the future so that no more Addendum changes in implementation time can harm the implementing contractor. Data collection includes primary data by interviewing 25 respondents representing 155 populations consisting of 15 work units, 10 supervisory consultants, 25 implementing contractors and 105 land owners. Secondary data collection was carried out by requesting the necessary data from the implementing contractor. Cash Flow optimization evaluation is carried out by calculating 2 cash flow simulations, namely: Simulation 1 (823 days based on addendum 1), simulation 2 (1063 days / based on addendum 2). Determination of the right strategy to avoid addendum changes in implementation time is done using SWOT Analysis. Calculation of both simulations obtained results: In Simulation 1 (823 days) the acceleration of the implementer
Factors affecting bond strength between acrylic dental elements and thermoplastic nylon bases: a systematic literature review Denny Adhinugroho Suciptoi; Henny Pratiwi Adi; Prabowo Setiyawan
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 7 No. 3 (2026)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol7iss3pp518-522

Abstract

The Transit Oriented Development Tanjungbarat Apartment Project is part of Perumnas' initiative to provide vertical housing integrated with public transportation. However, this project faces various challenges due to project risks, such as permitting issues, resource limitations, financial constraints, and other external factors. This study aims to analyze the influence of various types of risks on project success, assess risk probability and impact, and evaluate the risk mitigation strategies implemented by Perum Perumnas.The research employs a quantitative method with a case study approach. Data is collected through literature reviews, questionnaires, and interviews. The questionnaire respondents consist of 32 individuals, including the Project Management Office, project leaders, risk management, project structure, construction management, and construction executors involved in the TOD Tanjung Barat Apartment Project. The questionnaire results undergo validity and reliability testing, followed by multiple regression analysis. The identified risk variables are assessed using a risk scale formula (Probability × Impact) on a risk map to determine risk levels.The research findings indicate that the highest risk levels originate from resource-related aspects (4.08), design (4.06), environmental factors (4.06), financial aspects (3.72), and construction (3.87), all of which significantly impact project success. The risk matrix evaluation reveals that the project faces 4 risks at a high level, 7 at a moderate to high level, 6 at a moderate level, 8 at a low to moderate level, and 3 at a low level. The implemented risk mitigation strategies have proven effective in reducing risk levels, particularly for high-risk categories, contributing to the success of the Transit Oriented Development Tanjungbarat Project. However, continuous risk management is necessary to prevent risk escalation, especially for future project
Co-Authors A Khamid A.A. Ketut Agung Cahyawan W Abdul Rochim Abdul Rochim Agung Susanto Agustina, Rizqa Dwi Aini, Irvita Asri Andi Bongawali Andika, Reno Antonius Antonius Awliya Tribhuwana Az Zukhruf, Alif Azmia, Ghefira Raras Nur Candra Irawan Chairurraziqin, Maulvi Debi, Yoga Tegar Ardi Denny Adhinugroho Suciptoi Dhamang Budi Cahyono Dirga Asmara Putra Diva Hestrada Rizki Pradiga Djoko Susilo Adhy Eko Muliawan Satrio, Eko Muliawan Esti Santoso Falah, Fajrul Fateh BENDAHMANE Gunarto Gunarto Hakiim, Chevy Helmi Hermin Poedjiastoeti Hermin Poedjiastoeti Heru Sulistyo Idrus Idrus Ignatius Sudarsono Ija, Lulu Isnaini Imam  Wahyudi Istighfah, Jafifah Mega Nur Jonathan PLANCHOT Jorge Jansen Juny Andry Sulistyo Kartono Wibowo Kartono Wibowo, Kartono Khakim, Ahmad Nur Kusumadewi, Adlina M Martomo Maxime LENOIR Mayla, Hana Aulia Aqidathul Moch Faiqun Ni’am Moh. Faiqun Ni’am Muhammad Abdul Khalim Muhammad Afif Ridwan Muhammad Zahran Fakhri Mukmin, Niki Afidah Muliawan, Eko Nahdatunnisa, Nahdatunnisa Ni'am, Moh Faiqun Niam, Moh Faiqun Octaviano, Bagas Pentenga, Tom Joy Perdana, Haris Athiya Prabowo Setiyawan Prasetyo, Adil Farhan Pratama, Daffa Aditya Pratikso Pratikso Pujianto, Ahmad Rachmat Mudiyono Rachmat Mudiyono, Rachmat Rhamadhan, Bintang Fajri Rick Heikoop Rifqi Brilyant Arief Rizal Arif Setiawan Rusmiyanto, Dedy S Imam Wahyudi S. Imam Wahyudi S. Imam Wahyudi Saifullah Candra Sulistiyo samsul arifin Saputri, Pungky Lela Sayfuddin, S. Sayyidah, Clara Najibatus Senoputro, Rifqy Anggoro Slamet Imam Wahyudi Slamet Imam Wahyudi, Slamet Imam Son Haji Sri Anik, Sri Sunarna Sunarna Suwandrianto, Dedik Tahir, M. Arzal Turrohmah, Annisa Ulum, Muhammad Miftakhul Utami, Maharani Mega Wahyudi, Rahmatia Sarah Wanti, Novita Rizka Wawan Setiawan Wibowo, Ardi Yonamastuti, Ervina Zahra, Sabila Zainal Alim Adiwijaya, Zainal Alim