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All Journal Fondasi: Jurnal Teknik Sipil Civil Engineering For Community Development Theta: Journal of Statistics
Midia Rahma
Universitas Sultan Ageng Tirtayasa
Civil Engineering, Building, Construction & Architecture Transportation

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Robust Quality Control Implementation for Nickel Pig Iron Using Median Absolute Deviation Estimators Aditya Rahadian Fachrur; Chyntia Devi Octaviany; Wiwien Suzanti; Midia Rahma; Mariana Feronica Damanik; Ferdian Bangkit Wijaya
Theta: Journal of Statistics Vol 1, No 1 (2025): Available Online in March 2025
Publisher : Faculty of Engineering, Univesitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/tjs.v1i1.31481

Abstract

Nickel Pig Iron (NPI) is one of the main products of Indonesia's nickel-based industry, which is still expanding. Reducing production costs and guaranteeing product quality depends on maintaining a constant nickel content. The Median Absolute Deviation (MAD) estimator, which is resistant to outliers and non-normal distributions, is used in this study's control charts and process capability analysis. After 15 days of production, data was gathered and examined using capability indices and control charts based on MAD. According to the results, the process mean is not statistically in control since many points exceed the control borders, even while process variation stays within the control limits. Acceptable process precision was indicated by the process capability index CpMAD being above 1. However, the CpkMAD value below 1 suggests that the mean process output does not consistently meet the target specifications. These findings highlight the need for further investigation and process improvement to enhance quality consistency in NPI production.
Study of Granular Soil Behavior under Different Drainage Conditions Ina Asha Nurjanah; Rama Indera Kusuma; Enden Mina; Woelandari Fathonah; Prastika Wahid Santoso; Midia Rahma; Abdurohim Abdurohim
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39876

Abstract

Granular soils, such as sand and gravel, exhibit distinct mechanical behavior depending on drainage conditions during loading. This study aims to evaluate the influence of drained and undrained conditions on shear strength, deformation characteristics, and pore water pressure response of granular soils through a comprehensive literature review. The research is grounded in classical soil mechanics theories and recent studies, without conducting laboratory testing, and instead focuses on a comparative analysis of previous findings.The results indicate that under drained conditions, granular soils generally exhibit higher shear strength due to the absence of excess pore water pressure, allowing effective stress to govern soil behavior. Dense granular soils tend to exhibit dilative behavior, which contributes to increased strength and stability. In contrast, under undrained conditions, the inability of pore water to dissipate leads to the generation of excess pore water pressure, reducing effective stress and shear strength. This condition is particularly critical in loose saturated sands, where contractive behavior may trigger instability or liquefaction.Furthermore, this study contributes by providing a conceptual synthesis that integrates effective stress, pore water pressure, and deformation behavior into a unified framework for understanding granular soil response under different drainage conditionsmore reliable and safer geotechnical engineering practices.
Field Testing and Concrete Quality Analysis for Column, Beam and Floor Slab Structures at Siloam Silampari Hospital, Lubuk Linggau City using the Ultrasonic Pulse Velocity (UPV) Method M. Hasbi Zuher; Zulmahdi Darwis; Soelarso Soelarso; Baehaki Baehaki; Midia Rahma; Abdurohim Abdurohim; Arief Budiman; Ina Asha Nurjanah
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.41195

Abstract

The construction of tall buildings is inextricably linked to various quality standards, which are used to create safe and comfortable buildings for occupants, users, and surrounding buildings. Concrete quality testing is one of the necessary tests performed on construction projects to ensure that towers or tall buildings comply with existing standards and regulations. Testing concrete structures after casting is crucial to ensure they conform to the intended design. Various types of testing can be performed, including non-destructive testing (NDT), semi-destructive testing (SDT), and destructive testing (DT). In this study, we used the Ultrasonic Pulse Velocity (UPV) testing method. Concrete testing using UPV is one of the tests that is more widely used because of the satisfactory results using ultrasonic waves and requires relatively low costs compared to other testing methods. The results obtained were in the Good Concrete Quality Category from the total sample of test points. The minimum concrete compressive strength requirement is 21 MPa for special structural concrete quality based on SNI-2847-2019.
IDENTIFIKASI KERENTANAN ASET PUBLIK PADA KUA KECAMATAN PONTANG Ina Asha Nurjanah; Midia Rahma; Enden Mina; Rama Indera Kusuma; Woelandari Fathonah; Prastika Wahid Santoso; Soelarso Soelarso; Abdurohim Abdurohim; Safira Aprilya Putri Setyana; Muhammad Dananiri; Muhammad Bintang Rangga Permana; Raihan Naufal Hakim; Muhammad Rakha Revaldo; Robby Firman Hidayat; Didied Haryono
Civil Engineering for Community Development (CECD) Vol 5, No 1 (2026): Edisi April 2026
Publisher : Department of Civil Engineering Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/cecd.v5i1.41160

Abstract

Aset publik pada instansi pemerintah memiliki peran penting dalam menunjang pelayanan kepada masyarakat, sehingga kondisi fisik struktur bangunan perlu dipastikan dalam keadaan aman dan layak fungsi. Kantor Urusan Agama (KUA) Kecamatan Pontang sebagai salah satu fasilitas pelayanan publik memerlukan identifikasi terhadap kerentanan aset, khususnya dari aspek fisik struktur bangunan. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengidentifikasi tingkat kerentanan aset publik berdasarkan kondisi eksisting di lapangan. Metode yang digunakan meliputi tahapan persiapan melalui pelatihan enumerator, survei lapangan untuk pengumpulan data kondisi fisik bangunan, serta analisis berdasarkan hasil pengamatan visual terhadap elemen struktur. Parameter yang diamati mencakup kondisi komponen struktur seperti kolom, balok, dinding, dan atap, termasuk indikasi kerusakan seperti retak, deformasi, dan penurunan kualitas material. Hasil identifikasi menunjukkan adanya variasi tingkat kerentanan pada beberapa bagian bangunan yang dipengaruhi oleh kondisi fisik dan usia bangunan. Kegiatan ini memberikan gambaran awal mengenai kondisi fisik aset publik di KUA Kecamatan Pontang sebagai dasar informasi dalam pengelolaan aset, tanpa memberikan rekomendasi tindak lanjut.
Co-Authors Abdurohim Abdurohim Aditya Rahadian Fachrur Arief Budiman Baehaki Baehaki Chyntia Devi Octaviany Didied Haryono Enden Mina, Enden Fathonah, Woelandari Ferdian Bangkit Wijaya Ina Asha Nurjanah M. Hasbi Zuher Mariana Feronica Damanik Muhammad Bintang Rangga Permana Muhammad Dananiri Muhammad Rakha Revaldo Prastika Wahid Santoso Raihan Naufal Hakim Rama Indera Kusuma Robby Firman Hidayat Safira Aprilya Putri Setyana Soelarso Soelarso Wiwien Suzanti Zulmahdi Darwis