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All Journal Journal of Development Research JTERA (Jurnal Teknologi Rekayasa) Dinamisia: Jurnal Pengabdian Kepada Masyarakat WAKTU: Jurnal Teknik UNIPA Jurnal Fisika : Fisika Sains dan Aplikasinya Piston: Journal of Technical Engineering ILKOMNIKA: Journal of Computer Science and Applied Informatics CERMIN: Jurnal Penelitian G-Tech : Jurnal Teknologi Terapan Jurnal Pijar MIPA JUSTER: Jurnal Sains dan Terapan
Pratama, Ananta Kusuma Yoga
Program Studi Teknik Sipil, Fakultas Teknik, Universitas 17 Agustus 1945 Banyuwangi
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Time and Cost Efficiency Analysis of Hotmix Road Rehabilitation: A Case Study in Papring, Kalipuro District Prasetyo, Novan Dwi; Sunarko; Prasetyo, Yohanes Pracoyo Widi; Pratama, Ananta Kusuma Yoga
Journal of Development Research Vol. 9 No. 2 (2025): Volume 9, Number 2, November 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/jdr.v9i2.456

Abstract

Efficient project delivery is a critical requirement for rural road rehabilitation programs, yet empirical evaluations of implementation efficiency remain limited. This study analyzes the time and estimated cost efficiency of the Papring Hotmix Road Rehabilitation Project in Kalipuro District, Banyuwangi, using a descriptive quantitative case study approach based on weekly and monthly project documentation. Project performance was measured by comparing baseline planning with field realization, supported by calculations of time efficiency, deviation analysis, and cost implication estimation derived from work-weight distribution. The project was completed in 55 days, significantly faster than the 120-day planned duration, resulting in a time efficiency of 54.17% and a maximum positive deviation of +76.32% at completion. Major work components: AC-WC (65.616%), AC-BC (18.249%), and aggregate base layer (12.436%), were executed intensively between Weeks 4 and 7, enabling a shortened execution period that suggests potential savings in indirect project costs such as overhead, labor, and field operations. Acceleration was driven by effective technical scheduling, early resource mobilization, optimized labor deployment, and strong contractor–consultant coordination. The findings highlight the importance of structured progress evaluation for improving scheduling and cost control in rural road rehabilitation projects. Future work should incorporate financial realization data and risk-productivity modelling to strengthen efficiency assessment in accelerated infrastructure delivery.
Karakterisasi Osilasi Single Degree Of Freedom Suspensi Kendaraan Terhadap Eksitasi Permukaan Jalan Berbasis Akselerometer Smartphone Pratama, Ananta Kusuma Yoga
JUSTER : Jurnal Sains dan Terapan Vol. 5 No. 1 (2026): JUSTER: Jurnal Sains dan Terapan
Publisher : Jompa Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57218/juster.v5i1.2483

Abstract

Sistem suspensi kendaraan dapat dimodelkan sebagai sistem getaran teredam single degree of freedom (SDOF), namun validasi karakteristik dinamis model ini umumnya memerlukan instrumen khusus yang relatif mahal dan tidak selalu tersedia untuk pengukuran lapangan. Penelitian ini mengusulkan pendekatan pengukuran berbasis akselerometer smartphone sebagai metode berbiaya rendah untuk mengkarakterisasi respons dinamis sistem SDOF suspensi kendaraan secara in-situ. Kontribusi utama penelitian ini adalah menunjukkan karakterisasi osilasi SDOF dalam menjelaskan fenomena resonansi akibat eksitasi permukaan jalan yang bermanfaat untuk menjembatani analisis sinyal getaran dengan dasar fisika sistem suspensi kendaraan berbasis teori mekanika. Percepatan vertikal (sumbu z) diukur dengan menempatkan smartphone pada dashboard kendaraan, kemudian sinyal dianalisis pada domain waktu menggunakan Root Mean Square (RMS) dan pada domain frekuensi menggunakan analisis Power Spectral Density (PSD) untuk mengidentifikasi distribusi energi getaran dan frekuensi dominan sistem. Hasil menunjukkan bahwa nilai RMS akselerasi pada jalan biasa lebih tinggi sekitar 42% dibandingkan jalan tol, serta magnitudo PSD pada jalan biasa secara konsisten lebih besar pada hampir seluruh rentang frekuensi,. Hasil ini menunjukkan bahwa kombinasi parameter RMS dan karakteristik PSD dari data smartphone berkorelasi dengan tingkat kekasaran permukaan jalan dan serta memberikan estimasi yang konsisten terhadap respons dinamis sistem SDOF.
Influence of Gravity-Induced Axial Force on the Natural Frequencies of an Inclined Cantilever Beam Pratama, Ananta Kusuma Yoga; Sunarko, Sunarko
Jurnal Pijar MIPA Vol. 21 No. 2 (2026)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v21i2.11634

Abstract

The limitations of conventional horizontal cantilever models in capturing gravity-induced axial effects in inclined structures that influence stiffness and natural frequencies. This study investigates the influence of gravity on the dynamic behavior of an inclined cantilever beam, with particular emphasis on a 10-m steel beam configuration. Unlike conventional horizontal cantilever models, structural inclination generates a spatially varying axial compressive force that increases from zero at the free end to a maximum value at the fixed support. The objective of this study is to analyze how this gravity-induced axial force distribution affects the natural frequencies and effective stiffness of the beam. To achieve this, a high-fidelity numerical model was developed in MATLAB, where the beam was discretized into 100 Euler–Bernoulli elements to capture the gradual variation of axial load and the resulting geometric softening effect. The analytical formulation is based on the Rayleigh–Ritz method, in which the spatial axial force distribution  is incorporated into the potential energy expression. The predicted natural frequencies were validated through frequency-domain analysis of the transient response obtained from numerical simulation. Both analytical and numerical results indicate that, for an inclination angle of 60°, the first and second natural frequencies are approximately 1.84 Hz and 11.61 Hz, respectively. These results demonstrate that beam inclination significantly reduces the effective structural stiffness due to gravity-induced geometric softening. The findings highlight the importance of incorporating spatially varying geometric stiffness in the dynamic analysis, stability assessment, and vibration-sensitive design of large-scale inclined cantilever structures.
RESPON PERAMBATAN TERMAL TRANSIEN PADA MATERIAL DINDING BANGUNAN DENGAN VARIASI KETEBALAN MENGGUNAKAN METODE BEDA HINGGA IMPLIS Pratama, Ananta Kusuma Yoga; Pranoto, Hari
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 11 No 1 (2026): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v11i1.27378

Abstract

Penelitian ini menganalisis perpindahan panas konduksi satu dimensi secara transien pada dinding bangunan yang dikenai pembebanan suhu permukaan luar akibat radiasi matahari menggunakan pendekatan numerik berbasis persamaan panas. Persamaan panas satu dimensi diselesaikan dengan metode beda hingga menggunakan skema implisit Backward Time–Central Space (BTCS) untuk menjamin stabilitas numerik pada simulasi waktu yang relatif panjang. Tiga jenis material dinding, yaitu beton ringan, bata merah, dan batako, dianalisis dengan variasi ketebalan 0,15 m, 0,20 m, dan 0,25 m. Suhu awal dinding diasumsikan seragam sebesar 25 °C, sementara permukaan luar ditetapkan pada suhu konstan sebesar 34 °C. Hasil simulasi menunjukkan bahwa panas merambat secara bertahap dari permukaan luar menuju bagian dalam dinding, dengan laju penetrasi yang dipengaruhi oleh sifat termofisika material dan ketebalan dinding. Batako menunjukkan respons termal yang lebih cepat dibandingkan bata merah dan beton ringan, sedangkan peningkatan ketebalan dinding secara konsisten memperlambat kenaikan suhu pada sisi dalam. Analisis nondimensi menggunakan Fourier number menegaskan bahwa seluruh sistem berada dalam rezim transien selama waktu simulasi, sehingga perbedaan respons termal yang diamati dapat dijelaskan sebagai konsekuensi langsung dari mekanisme difusi panas dan skala panjang karakteristik dinding.
Co-Authors Ainur Rofiq Ainurrofiq, Ainurrofiq Magdalena Putri Nugrahani Mitrayana Mitrayana - Oktavima Wisdaningrum Pranoto, Hari Prasetyo, Novan Dwi Sunarko Sunarko Sunarko Yohanes Pracoyo Widi Prasetyo