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All Journal LEMMA: Letters Of Mathematics Education Jurnal Elemen JURNAL KEPEMIMPINAN DAN PENGURUSAN SEKOLAH International Journal of Community Service Jurnal Pengabdian Masyarakat (ABDIRA) Indo-MathEdu Intellectuals Journal Jurnal Talenta Sipil Al-Irsyad Journal of Mathematics Education International Journal of Renewable Energy Development Jurnal Ilmiah Al-Furqan : Al-qur'an Bahasa dan Seni Algebra: Journal of Matematics, Statistics and Computation
Reno Warni Pratiwi
Universitas Mahaputra Muhammad Yamin Solok
Religion Aerospace Engineering Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Public Health Social Sciences Other

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VALIDITAS PENGEMBANGAN MODUL DIGITAL METODE NUMERIK PADA MATERI INTERPOLASI DI PROGRAM STUDI PENDIDIKAN MATEMATIKA FKIP UMMY SOLOK Warni Pratiwi, Reno
Jurnal Ilmiah Al-Furqan: Al-qur'an Bahasa dan Seni Vol. 9 No. 1 (2022): Jurnal Ilmiah Al-Furqan: Al-qur'an Bahasa dan Seni
Publisher : Institut Darul Quran Payakumbuh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69880/alfurqan.v9i1.57

Abstract

Tujuan yang akan dicapai dalam penelitian ini adalah untuk menghasilkan modul digital metode numerik yang valid pada materi interpolasi di program studi Pendidikan Matematika FKIP UMMY Solok. Penelitian ini adalah penelitian pengembangan dengan model pengembangan ADDIE. Model ini terdiri dari 5 tahap pengembangan, yaitu Analisys, Design, Devolopment, Implementation, Evalution. Pada penelitian ini dibatasi pada tahap development. Pada tahap development modul dirancang dan divalidasi. Modul digital yang telah dirancang divalidasi oleh dua orang validator. Berdasarkan hasil penelitian diperoleh bahwa rata-rata hasil validasi modul digital yaitu 4,9 dengan kriteria sangat valid. Sehingga dapat disimpulkan bahwa telah dihasilkan modul modul digital Metode Numerik pada materi interpolasi yang valid di FKIP UMMY Solok.
Persepsi Guru SDN 09 Muaro Kalaban Terhadap Efektivitas Pelatihan Pengembangan Soal Numerasi Berbasis Aplikasi Testmoz Iska, Yulike; Zaimil, Roza; Rosmiyati, Rosmiyati; Pratiwi, Reno Warni
Indo-MathEdu Intellectuals Journal Vol. 6 No. 1 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i1.2654

Abstract

This research is motivated by the importance of technology being integrated in learning, including numeracy. As a result of initial observations, 60% of students understood the basic concept of numeracy, while most teachers had no experience in developing numeracy problems or using the testmoz application. This study aims to describe the perception of SDN 09 Muaro Kalaban teachers on the effectiveness of training in the development of numerical questions based on the testmoz application. This study uses a quantitative descriptive approach with an instrument in the form of a questionnaire. The respondents in this study were 7 people. The data analysis technique used is descriptive analysis. The results of the study show that the majority of teachers have a very positive perception of this training. There were no negative responses from respondents to this training. The results of this study show that this training is effective in improving teacher competence, providing significant benefits to numeracy-based learning, and can be used as a model for teacher professional development in other schools. So it can be concluded that the training on the development of numeracy questions based on the testmoz application at SDN 09 Muaro Kalaban is considered very effective in improving teacher competence  
Pengembangan Media Pembelajaran Interaktif Berbasis Emaze Menggunakan Pendekatan Kontekstual pada Materi Bilangan Bulat Kelas VII SMP Negeri 4 Kubung Hayati, Sismi; Pratiwi, Reno Warni; Oktavinora, Rita
Indo-MathEdu Intellectuals Journal Vol. 6 No. 7 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i7.4493

Abstract

This research is motivated by the lack of understanding of the material by students, student boredom in learning, limited learning resources and the use of technology in learning that has not been maximized. The purpose of this study is to produce interactive learning media based on emaze using a contextual approach to integer material for class VII of SMP Negeri 4 Kubung. This type of research is research and development, using PLOOMP development consisting of three stages (Preliminary Research Phase, Design & Develop Prototype, Evaluation). The instruments used are teacher and student interview questionnaires, validation questionnaires consisting of language experts, media experts and material experts. The development of interactive learning media based on emaze goes through three stages. The first stage is preliminary analysis, namely: needs analysis, curriculum analysis, concept analysis, and analysis of student characteristics. The second stage: Creation and development, namely self-evaluation and expert validation. The third stage of evaluation is an assessment of whether interactive learning media based on emaze is valid for use. Based on the results of the validation of the material expert questionnaire 96.67%, media experts 83.88%, and language experts 88.00%, so that the average of the four validators is 89.51%. The results of this validation indicate that the developed emaze-Based Interactive Learning Media has been tested for quality and declared valid for use in the learning process.
Utilization of Solar Energy As An Environmentally Friendly Source of Electricity In Karang Taruna, Gambir District Yanti, Widia; Pratiwi, Reno; Yulia, Prayang Sunny; Fadliah, Fadliah; Pauhesti, Pauhesti; Rohman, Faiz; Istibra, M. Khair Dabit
International Journal Of Community Service Vol. 5 No. 4 (2025): November 2025 ( Indonesia - Thailand - Malaysia - Timor Leste - Philippines )
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijcs.v5i4.921

Abstract

This community service program titled "Socialization and Training on the Utilization of Solar Energy as an Environmentally Friendly Electricity Source in Karang Taruna, Gambir District" aimed to address the critical issues faced by the community due to their heavy reliance on unstable and costly fossil energy from PLN (the state-owned electricity company). The program also targeted the low understanding and practical skills related to solar energy and the underutilization of solar energy potential in urban settings. The implementation comprised two core components: socialization of solar energy and climate change impacts, and hands-on training on mini solar panel systems. Using interactive lectures, demonstrations, direct practices, and discussions, the program was conducted on March 16, 2025, involving 31 participants mainly from Karang Taruna members. A significant improvement in participants’ comprehension was observed, with average pre-test scores rising from 45 to 82, indicating an 82.22% increase. Furthermore, participant satisfaction reached 90.32%, alongside a 70.96% enhancement in practical ability to operate mini solar panel setups. Key outputs included teaching materials, posters, and scientific articles, collectively contributing toward enhanced community energy independence, reduced electricity costs, and promotion of clean energy adoption in urban areas.
Seawater utilization through hybrid photocatalysis-electrocoagulation process using pumice-supported g-C3N4/BiOBr for hydrogen production and methylene blue decolorization Sudianto, Julius Rainer; Pratiwi, Reno; Susanto, Bambang Heru; Slamet, Slamet
International Journal of Renewable Energy Development Vol 15, No 2 (2026): March 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61722

Abstract

This study investigated the simultaneous photocatalysis-electrocoagulation process using pumice-supported g-C3N4/BiOBr nanocomposites in seawater treatment to remove organic pollutants and generate hydrogen gas. The photocatalyst nanocomposite was synthesized via coprecipitation and immobilized on the pumice surface to enhance light exposure and facilitate catalyst recovery. The performance of the hybrid system was evaluated under various operational parameters, including applied voltage, seawater concentration, and pH. The results showed that the combined process outperformed the individual photocatalysis and electrocoagulation systems. Optimal performance was achieved at pH 3 and 15% seawater concentration, resulting in 99.37% methylene blue decolorization and 211 mL of hydrogen within 2 hours. At higher salinities and lower pH, increased coagulant formation caused a shadowing effect, limiting photocatalytic efficiency despite continued hydrogen evolution. The XPS (X-Ray Photoelectron Spectroscopy) characterization of the photocatalyst material, demonstrated the successful formation of a nanocomposite with a stable surface chemistry. Photoluminescence analysis confirmed that the charge separation mechanism could be enhanced, suppressing the recombination rate and being the primary reason for the enhanced photocatalysis process, although interfacial electronic interactions remained limited. Overall, this study demonstrates that the pumice-supported g-C₃N₄/BiOBr photocatalyst integrated with electrocoagulation provides an effective and stable platform for seawater-based hydrogen production and organic pollutant removal.
Penerapan Metode Time Cost Trade Off (TCTO) pada Proyek Pembangunan Peningkatan Gedung Dinas Pekerjaan Umum Kota Balikpapan Ramadhan, Nadhilah Nur; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1107

Abstract

Delays in project work can be anticipated by accelerating its implementation. In accelerating the project, it must be well planned by using various acceleration alternatives. Alternatives that can be used to accelerate the project are by adding working hours, adding labor, or a combination of both. The purpose of this study is to analyze the application of the Time Cost Trade Off method with alternative acceleration of adding working hours and alternative acceleration of adding labor. The method used is a case study on the Balikpapan City Public Works Department Building Improvement Construction Project with a duration of 174 calendar days by finding the critical path using Microsoft Project and then crashing to obtain the cost slope of activities on the critical path. The results of this study obtained the optimal alternative is the acceleration alternative of adding the number of crashing 3 labor with the duration required to complete the project is 68.89 days at a cost of Rp7.770.887.756. which is the acceleration alternative that has the lowest cost of other acceleration alternatives.
Penerapan Metode PDM dan Pert pada Proyek Pembangunan Pusat Layanan Haji dan Umroh Terpadu Kota Balikpapan Purwanto, Azan Yamani; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.873

Abstract

The construction of the Integrated Hajj and Umrah Service Center (PLHUT) in Balikpapan City is a construction project that requires effective time management to ensure timely completion. This study aims to analyze the critical path and the probability of successful project completion using the Precedence Diagram Method (PDM) and Program Evaluation and Review Technique (PERT). The PDM method is utilized to identify the project’s critical path by structuring the interdependencies of work items, visualized through a network diagram. Meanwhile, the PERT method is employed to calculate the probability of project completion within the planned duration, taking into account the uncertainties in activity durations. Based on the analysis results, the PLHUT construction project in Balikpapan City, with a planned duration of 160 days, contains several critical activities that require careful resource management and scheduling. The probability calculation using the PERT method indicates a high likelihood of completing the project on time. Thus, the combination of PDM and PERT methods serves as an effective approach in construction project management to enhance efficiency and schedule accuracy.
Schedule Actual Proyek dengan Metode Precedence Diagram Method (PDM) dan Program Evaluation and Review Technique (PERT ) pada Proyek Pembangunan Pasar Muwaffa, Muhammad Kholish; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1136

Abstract

The construction and development of the Klandasan Block C Market Distribution Facility in Balikpapan City is a strategic construction project that plays an important role in supporting the economic activities of the local community. This project requires optimal planning and time management to ensure that all stages of the work can be completed according to the target. Problems that often arise in the implementation of construction projects are delays due to uncertainty in the duration of activities and a lack of synchronization between interdependent activities. Therefore, this study was conducted with the aim of identifying critical paths and calculating the probability of successful project completion using the Precedence Diagram Method (PDM) and Program Evaluation and Review Technique (PERT) approaches. The PDM method is used to describe the dependency relationships between activities, determine the critical path, and identify activities that have the potential to cause delays. Meanwhile, the PERT method is applied to estimate the project completion time by considering the variability of activity duration through three time estimates, namely optimistic, realistic, and pessimistic. The analysis results show that the project has several activities that are classified as critical and require intensive monitoring of resource allocation to prevent schedule deviations. Based on the calculations, projects with a planned duration of 150 days have a high probability of being completed on time. In conclusion, the combination of PDM and PERT methods provides effective results in the process of planning and controlling project schedules, helping project managers determine activity priorities, optimize time efficiency, and minimize the risk of construction delays.
Analisis Keterlambatan pada Proyek Peningkatan Gedung Kantor DPU Kota Balikpapan Menggunakan Lean Six Sigma Framework Bunga, Hesra; Utomo, Gunaedy; Pratiwi, Reno
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1134

Abstract

Construction project delays are a common problem that can have a significant impact on time efficiency, costs, and the quality of work. Therefore, a systematic and data-driven management approach is needed to identify the main causes of delays and determine the appropriate improvement strategies. This study aims to analyze the factors causing delays in the Balikpapan City Public Works Office (DPU) building improvement project using the Lean Six Sigma approach through the Define, Measure, Analyze, Improve, and Control (DMAIC) stages. The research data was obtained from project documents, field observations, interviews, and questionnaires administered to workers and project supervisors. The analysis was conducted using Pareto charts, comparisons of planned and actual workforce allocations, and fishbone diagrams to identify the root causes of delays. The results of the study show that the dominant factors causing project delays are human resources aspects, particularly the mismatch between the number of workers available and the work requirements in a given period, as well as the transfer of workers to other projects. Meanwhile, factors such as machinery, work methods, materials, and environmental conditions were not found to have a significant impact on project delays, as most were considered to be in fairly good condition and did not hinder the work process. Based on the results of this analysis, the recommended improvement strategies include improving worker attendance monitoring, adjusting worker allocation according to the needs of each stage of the project, and recruiting additional workers during periods of high workload
Studi Komparatif Perhitungan Anggaran Biaya dengan Building Information Modelling (BIM) 5D pada Pembangunan Gedung Sistem Administrasi Manunggal Satu Atap Kepolisian Daerah Kalimantan Timur Amini, Putri Arlisdyawati Agustina; Pratiwi, Reno; Harami, Fachruddin
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1143

Abstract

In the construction industry, the accuracy of volume calculations and cost estimation is a crucial factor in ensuring project efficiency and quality. However, many projects in Indonesia still use conventional methods such as AutoCAD and Microsoft Excel, which are not integrated and prone to input errors and cost overruns. Along with technological advancements, Building Information Modelling (BIM) has emerged as an innovative solution capable of integrating all project data into a single digital model that can be updated in real time. This study aims to compare cost estimation results between the conventional method and the 5D BIM method using Autodesk Revit software on reinforced concrete structural works for the construction of the One-Stop Administration System (SAMSAT) Building of the East Kalimantan Regional Police, as well as to analyze the level of efficiency achieved. The research employs a comparative-quantitative approach using data obtained from the Detail Engineering Design (DED), Bill of Quantities (BoQ), and Unit Price Analysis (AHSP). The results show that the conventional method produces higher costs due to generalized volume calculations and excessive tolerances, while the 5D BIM method provides more accurate, efficient, and integrated results since each structural element is calculated automatically through digital modeling. Therefore, the implementation of 5D BIM has proven to enhance accuracy, time efficiency, and overall effectiveness in construction cost planning compared to conventional methods.
Co-Authors Abdilah, Obinata Ridho Adevi Murni Adel Alim, Putra Chandra Rachmat Amini, Putri Arlisdyawati Agustina Arief Fadhilah Bambang Heru Susanto, Bambang Heru Bunga, Hesra Chusniyah, Dina Asmaul Dani, Arman Sulfian Devi, Suheriah Mulia Fadliah, Fadliah Hana Adhia, Hana Harami, Fachruddin Hayati, Sismi Iska, Yulike Istibra, M. Khair Dabit Kris Pudyastuti, Kris Lilik Zabidi, Lilik Lorenza, Dina Muwaffa, Muhammad Kholish Novianto, Riski Pratama Osni Erza, Osni Pauhesti, Pauhesti Prima, Andri Purwanto Purwanto, Azan Yamani Qohar, Abd. Ramadhan, Nadhilah Nur Rice Riyan Micola Riski Akbar Rita Oktavinora, Rita Rohman, Faiz Rosmiyati Rosmiyati Rosmiyati Rosmiyati Roza Zaimil Slamet . Sudianto, Julius Rainer Sugiarti, Lisa Syofriza Syofyan, Syofriza Utomo, Gunaedy Widia Yanti, Widia Yulia, Prayang Sunny