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All Journal International Journal of Engineering, Science and Information Technology Malikussaleh Journal of Mechanical Science Technology Sisfo: Jurnal Ilmiah Sistem Informasi
Lis Ayu widari
Universitas Malikussaleh
Astronomy Automotive Engineering 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 Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Pengaruh Geometrik Jalan Raya Terhadap Pengurangan Rasio Kecelakaan Lalu Lintas Teuku Mudi Hafli; Lis Ayu widari; Mira Anjani; Mirza Fahmi
Malikussaleh Journal of Mechanical Science Technology Vol 5, No 2 (2021): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v5i2.6488

Abstract

Ruas jalan Bts. Nagan Raya / Abdya – Blangpidie adalah ruas jalan penghubung kota Nagan Raya dengan Aceh Barat Daya. Pada ruas jalan tersebut sering terjadi kecelakaan lalu lintas yang mengakibatkan korban jiwa maupun materi. Penelitian ini dilakukan untuk mengetahui kelengkapan fasilitas jalan dan pengaruh geometrik jalan terhadap kecelakaan lalu lintas. Pengumpulan data primer yang meliputi data kecepatan sesaat, volume lalu lintas, kondisi dan perlengkapan geometrik jalan yang diperoleh dari survei di lapangan. Sedangkan data sekunder yang meliputi data kecelakaan dari Laka Lantas Kabupaten Aceh Barat Daya dan data populasi penduduk yang diperoleh dari internet melalui situs ABDYA dalam Angka. Dari hasil analisis diketahui yang paling berpengaruh terhadap kecelakaan adalah jarak pandang henti (Jh) jika dianalisis dari dua arah (Jembatan-Kota dan Kota-Jembatan) masing-masing 38,830 m <75 m dan 39,358 m <75 m dan jarak pandang menyiap (Jd)  jika dianalisis dari dua arah (Jembatan-Kota dan Kota-Jembatan) masing-masing 205,469 m < 350 m dan 208,578 m < 350 m jika dibandingkan dengan acuan Perencanaan Geoetrik Jalan Antar Kota (TPGJAK) 1997  sedangkan untuk hubungan antara derajat kejenuhan sangat tinggi karena hasil perhitungan derajat kejenuhan pada lokasi penelitian yaitu kurang dari 1 disimpulkan jalan tersebut lalu lintasnya lancar sehingga para pengendara kemungkinan besar mengendarai dengan kecepatan tinggi dan dapat mengakibatkan kecelakaan. Selain itu ada beberapa indikasi yang mengakibatkan terjadinya kecelakaan yaitu tidak adanya median jalan sehingga memungkinkan terjadinya kecelakaan dari arah berlawanan dan tidak tersedianya penerangan pada malam hari sehingga mempersempit jarak pandang pengendara saat berkemudi.
Experimental Study on Utilizing Polyethylene Terephthalate Waste as a Substitute for Coarse Aggregate in the Production of Lightweight Concrete Yulius Rief Alkhaly; Yovi Chandra; Lis Ayu Widari
International Journal of Engineering, Science and Information Technology Vol 3, No 2 (2023)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i2.436

Abstract

Concrete is a building material that consists of a mixture of aggregate and paste. Normal concrete has a unit weight of 2200 kg/m3 to 2500 kg/m3. In addition to normal concrete, lightweight concrete is also known which has a unit weight of less than 1900 kg/m3. The research was conducted to produce lightweight concrete by using aggregate from polyethylene terephthalate (PET) plastic waste as a substitute for coarse aggregate. This study used 40 cylindrical samples of 150 mm x 300 mm with variations in the use of PET aggregates of 25%, 50%, and 100% of the volume of coarse aggregate. The results show that the use of PET aggregates produces concrete with a decrease in compressive strength of 26%–39% and a decrease in water absorption of 2%–32% from normal concrete. Ultrasonic Pulse Velocity (UPV) testing showed that the concrete with PET aggregates had a lower wave propagation velocity compared to normal concrete. Moreover, Schmidt hammer and splitting tensile test showed that concrete with PET aggregates had lower rebound number and split tensile strength compared to normal concrete. PET substitution percentages of 25% and 50% resulted in unit weights of 2218 kg/m3 and 2102 kg/m3, respectively, which rule out the use of lightweight concrete. However, 100% PET substitution has a unit weight of 1855 kg/m3 with a compressive strength of 14.16 MPa, which can be categorized as moderate structural lightweight aggregate concrete.
Robust Evaluation Model Analysis of Decision Support System in Warehouse Selection Based on Multi-Criteria Decision Making and Sensitivity Analysis syukriah syukriah; Defi Irwansyah; Lis Ayu Widari; Mutamimmul Ula; Veri Ilhadi
Sisfo: Jurnal Ilmiah Sistem Informasi Vol. 10 No. 1 (2026): Sisfo: Jurnal Ilmiah Sistem Informasi, Mei 2026
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/sisfo.v10i1.26991

Abstract

Determining strategic warehouse locations is complex because it involves various criteria that are often conflicting, such as cost, ease of access, capacity, and operational risk. This study aims to evaluate a robust model in a Decision Support System (DSS) for warehouse selection using a Multi-Criteria Decision Making (MCDM) approach. The applied methodology combines several MCDM techniques, namely the Analytical Hierarchy Process (AHP) to determine the criteria weights and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) to rank alternatives. In addition, a sensitivity analysis is used to test the level of stability and resilience of the model to changes in criteria weights. The results show that the developed model is able to produce stable and responsive recommendations to variations in decision parameters. The sensitivity analysis also reveals that several criteria have a significant influence on the final result, thus requiring more attention in the weighting process.
Co-Authors Defi Irwansyah Ersa, Nanda Savira Mira Anjani Mirza Fahmi Mutamimmul Ula Syukriah Syukriah Teuku Mudi Hafli Veri Ilhadi Wesli Wesli Yovi Chandra Yulius Rief Alkhaly