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SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi
Published by Universitas Sarjanawiyata Tamansiswa
ISSN : 24606286     EISSN : 25793624     DOI : 10.30738/science tech.v2i1.396
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Engineering Materials Science & Nanotechnology
Jurnal SCIENCE TECH adalah jurnal yang diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LP2M) Universitas Sarjanawiyata Tamansiswa (UST) Yogyakarta. Jurnal ini diharapkan sebagai media bagi dosen, peneliti, praktisi, mahasiswa dan masyarakat luas yang memiliki perhatian terhadap bidang dan perkembangan ilnu pengetahuan dan teknologi. Jurnal SCIENCE TECH terbit dua kali setahun yaitu Januari dan Agustus, setiap terbit 8 artikel.
Arjuna Subject : Umum - Umum
Articles 154 Documents
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Analisis dan Perencanaan Struktur Perkerasan Lentur Jalan Berdasarkan MDPJ No. 03/M/BM/2024 Robiatul Adawiyah; Akhmad Gazali; Tezar Aulia Rachman
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 12 No 1 (2026): February
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol12.no1.a20971

Abstract

The revision of pavement design standards may significantly influence the determination of pavement thickness and structural configuration. This study aims to determine the design thickness of flexible pavement structure on the Kampung Baru – Beruntung Jaya road section based on the Manual Desain Perkerasan Jalan (MDPJ) No. 03/M/BM/2024 and to compare the results with MDPJ No. 02/M/BM/2017. The research employed a quantitative approach using traffic data (LHR and axle loads) and subgrade strength (CBR) as primary design parameters. The analysis shows that, based on Design Chart-4 of MDPJ 2024, the required pavement structure consists of 50 mm HRS-WC, 150 mm LFA Class A, and 150 mm LFA Class B (or natural gravel/stabilized layer with CBR > 10%). Compared to MDPJ 2017, MDPJ 2024 applies refined traffic classification and stricter CBR criteria, resulting in a more structured and adaptive design approach. The updated methodology provides improved technical control over pavement thickness determination and has the potential to enhance long-term pavement performance and reliability.
Integrasi Servicescape, HEALTHQUAL, dan Model Kano dalam Evaluasi Pengalaman Pasien Griya Sehat UKDC Surabaya Nyoman Sri Widari; Desrina Yusi Irawati; Fidelchristo Pijoh
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 12 No 1 (2026): February
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol12.no1.a21482

Abstract

The growing demand for holistic healthcare services requires comprehensive evaluation of service quality beyond therapeutic outcomes. This study examines patient experience in acupuncture and herbal services at Griya Sehat UKDC by integrating servicescape and HEALTHQUAL dimensions and classifying service attributes using the Kano model to determine improvement priorities. A case study design with a survey approach was conducted involving 32 patients. Data were collected through paired functional and dysfunctional Kano questionnaires, followed by validity and reliability testing. The results show that 76.3% of service attributes fall into the one-dimensional category, indicating that patient satisfaction is primarily driven by service performance. Therapist competence, safety assurance, empathy, cleanliness, and treatment efficiency emerge as critical determinants. These findings suggest that improving core service execution has a direct linear impact on patient satisfaction in holistic healthcare settings.
Perbaikan Laju Peningkatan Kuat Tekan Beton dengan Air IPAL Industri Beton Siap Pakai Menggunakan Accelerator Prasetya Adi; Arusmalem Ginting; Elin Widiastuti; Dewi Listyowati
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 12 No 1 (2026): February
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol12.no1.a21601

Abstract

The concrete industry is one of the industries that uses large volumes of water. Water is used for the cement reaction process and for cleaning equipment. Wastewater treatment plants (WWTPs) are used to restore water quality before being released into the environment. This study was conducted to determine the suitability of treated wastewater for reuse in concrete production. Using WWTP water as a cement reagent is important for conserving groundwater and supporting the sustainability of the ready-mix concrete industry. Previous research has shown that the disadvantage of using treated wastewater in ready-mix concrete is low initial compressive strength. A practical way to increase initial compressive strength is to use an accelerator. Research is needed to increase initial compressive strength for several concrete grades. The use of water as a cement reagent requires certain quality standards, and the higher the planned concrete quality, the better the water quality required, approaching or equivalent to potable water. The study was conducted on two concrete grades to determine the effect of using wastewater treatment for ready-mix concrete on the properties of the resulting concrete. The concrete's compressive strength was tested using a standard test, using a cylinder with a diameter of 150 mm and a height of 300 mm, and workability was tested using an Abrahms cone. Previous research has shown that the use of treated wastewater affects the speed of the concrete hardening process. Therefore, in this study, an accelerator, an additive, was used to accelerate the cement reaction. The results of the study showed that the accelerator added material increased the quality of 20 MPa concrete by 114.452%, 112.091%, 105.671%, and 103.351% compared to concrete with normal water and increased the quality of 25 MPa concrete by 103.909%, 103.442%, 105.940%, and 108.756% compared to concrete with normal water. The rate of increase in the compressive strength of concrete with wastewater without accelerator and using accelerator can meet the requirements.
Pengaruh Penyetelan Sudut Toe dan Tekanan Ban Terhadap Hasil Uji Side Slip Tester pada Mikrobus Isuzu NLR 55B LX Ni Putu Yana Teja Pertiwi; Joko Winarno; Mochamad Syamsiro; Sri Gati Hutomo
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 12 No 2 (2026): August
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol12.no2.a22186

Abstract

Front wheel alignment and tire pressure are important factors affecting vehicle stability, comfort, and driving safety during operation. This study aimed to analyze the effect of toe angle adjustment and tire pressure variation on side slip test results in the Isuzu NLR 55B LX microbus. The research employed an experimental method conducted at the Motor Vehicle Testing Unit of the Department of Transportation of Magelang City using an HPA side slip tester manufactured in 2004. The experimental variables consisted of three toe angle variations (-0°25′, +0°15′, and +0°25′) and three tire pressure variations (35, 50, and 65 psi), while the front wheel deviation data were analyzed descriptively and comparatively. The results showed that non-standard toe angle and tire pressure settings produced side slip values exceeding the allowable roadworthiness threshold of ±5 mm/m, with the highest deviation reaching -14.7 mm/m under low tire pressure and below-standard toe angle conditions. In contrast, the standard toe angle setting (+0°15′) with a tire pressure of 50 psi produced a side slip value of 3.6 mm/m, which remained within the acceptable threshold. Both under-inflated and over-inflated tire conditions were found to increase wheel deviation due to changes in tire-road contact characteristics. This study confirms that proper toe angle adjustment and tire pressure settings play an important role in maintaining vehicle stability, improving driving safety, and extending tire service life.

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