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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 141 Documents
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Pemantauan Tingkat Bisphenol A (BPA) dalam Air Sumur sebagai Indikator Pencemaran Lingkungan Kusuma Sari, Mustika; Yogana, Ridwan Andri
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 10 No 2 (2024): Agustus
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol10.no2.a17607

Abstract

Urban areas often face greater environmental pollution challenges compared to rural areas, primarily due to high population density, industrial activities, and inadequate waste management systems (Huang et al., 2012). Well water, frequently used as a drinking water source in many urban areas, is susceptible to contamination by various pollutants, including Bisphenol A (BPA) This study aims to monitor BPA levels in well water in urban areas as an indicator of environmental pollution  Well water samples from several strategic locations were analyzed using UV-Vis spectroscopy, an effective technique for detecting and measuring BPA levels in water The results showed variations in BPA concentrations by location. For instance, in Pakem, BPA concentrations ranged from 0.68 to 1.91 mg/L, in Ngemplak from 0.27 to 3.55 mg/L, and in Ngaglik from 1.37 to 1.91 mg/L. No direct pattern was found linking BPA concentration to population density. This variation is likely due to environmental factors, industrial activities, or consumption habits of the urban population. Although some locations have BPA concentrations below the EPA's safe contamination limit, this study highlights the importance of monitoring and managing health risks associated with BPA pollution in urban areas.
Keanekaragaman dan Potensial Musuh Alami Koloni Tetragonula leaviceps (Hymenoptera: Apidae: Meliponinae) Hashifah, Fathimah Nurfithri; Indraswari Suhri, Andi Gita Maulidyah; Nafisah, Nur Apriatun; Wahyudi, Christosie Immanuel
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a17830

Abstract

This study discusses the diversity of natural enemies of Tetragonula leaviceps (stingless) bees. The natural enemies obtained act as predators, honey thieves, and nest destroyers (intruders). This research was conducted from September to November 2020 at Caping Merapi Plantation Sleman, Yogyakarta. This research uses the random sampling method in collecting species. All natural enemies that have been identified were obtained as many as 11 species of natural enemies of Tetragonula leaviceps bees. These species were identified from 628 individuals consisting of Insecta, Arachnida, and Reptilia classes. All classes are potential predators, but those that act as honey thieves and nest destroyers are only from the Formicidae family. The results of this study are expected to increase knowledge in stingless bee farming so that it can further maximise nest boxes, nest areas or habitats, and supporting plants as a source of bee food.
Analisis Penentuan Kebutuhan Tempat Penampungan Sementara (TPS) Berbasis Unit Spasial Desa Studi Kasus Kota Yogyakarta Sardi; Setiawan, Pandri; Achmad, Nizar
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a18683

Abstract

Yogyakarta is a popular tourist destination for domestic and foreign tourists. The high number of tourists visiting each year has a positive impact on the city's economy, by increasing tourism sector income and creating job opportunities for the local community. However, this increase in tourist activity also causes environmental problems, especially related to the increase in waste volume. The increasing number of tourists visiting Yogyakarta is directly proportional to the increase in waste production, both organic and inorganic, which comes from various types of waste, such as food and drink packaging, as well as other plastic and non-plastic waste. In recent years, the waste problem in Yogyakarta City has become a serious issue that requires immediate handling. This research uses descriptive quantitative methods consisting of calculating population estimates, calculating TPS needs, and making maps. determining the distribution and calculation of TPS needs refers to SNI 19-2452-2002. The aim of this research is to determine the distribution of polling stations in the city of Yogyakarta using a geographic information system (GIS). Based on calculation results, the City of Yogyakarta, which has 14 sub-districts and 45 sub-districts, has 2 3R TPS (1 operating and 1 in the construction stage) and 14 Transfer Depots. Meanwhile, the required communal TPS is 155 units.
Penggunaan Komposit Karbon Aktif Termodifikasi Kitosan/Alginat Beads sebagai Adsorben Rhodamin B Anne, Chintya; Setyaningtyas, Tien; Riyani, Kapti
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a18902

Abstract

Activated carbon is one of the adsorbents that has a large surface, high porosity, and various functional groups on its surface. However, synthesized activated carbon is generally a powder that is difficult to separate from water, so it has low reuse effectiveness. Therefore, it is necessary to modify it to increase its adsorption effectiveness and also increase its adsorption capacity. One of them uses chitosan and activated carbon into beads, as shown in previous studies that reported high adsorption capacity of methylene blue (MB) dye. This modification is relevant to handle the problem of industrial wastewater containing hazardous dyes, such as rhodamine B, which has high stability and is difficult to biodegrade. This study aims to analyze the adsorption process of rhodamine B using KAKatea composite beads focusing on the optimum conditions, isotherm model, and reuse effectiveness. The results showed that the optimum conditions of adsorption were at a contact time of 210 minutes and rhodamine B pH of 3. This adsorption process followed the Freundlich isotherm model with reuse effectiveness reaching 82% for five cycles.
Evaluasi Tata Ruang dan Pencahayaan pada Rumah Instan Sederhana Sehat (RISHA) di Kampung Deret Petogogan Kebayoran Baru Jakarta Selatan Sulindra, Muhammad Rizky; Rajiman; Susanti, Junita
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a19167

Abstract

Simple Healthy Instant Homes (RISHA) was developed as a fast and affordable housing solution to reduce slum settlements and improve housing quality. However, optimal spatial planning and natural lighting are still needed to meet comfort and health standards. This research evaluates the suitability of spatial planning and natural lighting in RISHA housing in Kampung Deret Petogogan, focusing on type 18 and type 36 houses. The methods used include primary and secondary data collection and analysis based on the Housing and Settlement Development Guide and the Healthy Home Module. Evaluation of natural lighting using Dialux Evo 12.1 refers to SNI 03-2396-2001. The research results show that spatial planning suitability reaches 50% in type 18 houses and 53% in type 36 houses, classified as "quite suitable." The distribution of natural light only meets the standard of 50% in type 18 and 40% in type 36, with the multipurpose room and bathroom being the most affected. Improvements are needed in RISHA design to improve occupant comfort and health, such as optimizing openings and transparent materials to increase natural lighting. Further research is recommended to develop more adaptive design strategies for environmental conditions.
Peran Internet of Things (IoT) dalam Mengoptimalkan Rantai Pasok E-commerce: Systematic Literature Review Putri, Anggun Cynthia; Nasihin, Muhamad
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a19173

Abstract

This study identifies and analyzes the role of the Internet of Things (IoT) in optimizing the supply chain in the e-commerce sector through a Systematic Literature Review approach. By evaluating the literature from 2020 to 2024, this study shows that IoT can improve operational efficiency, transparency, and automation in supply chain management. Key findings reveal that IoT technology can reduce reliance on inefficient manual processes, allowing companies to monitor the condition of goods and logistics status in real-time. This contributes to faster decision-making and improved customer satisfaction. However, the research also found challenges in implementing IoT, such as the complexity of system integration, high initial investment requirements, and data security and privacy issues. Therefore, companies need to plan a well-thought-out strategy to overcome these obstacles. This research emphasizes the importance of collaboration between stakeholders to create an ecosystem that supports IoT adoption. Overall, this research provides valuable insights into the potential and challenges of IoT adoption, and recommends further research to ensure competitiveness in the digital age.
Media Pembelajaran Simulasi Kelistrikan Otomotif Berbasis Web pada Mata Pelajaran Praktik AC Mobil Setiawan, Intoyo Budi; Soeryanto; Agung, Achmad Imam; Arizal, Heru
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a19179

Abstract

The study findings indicate that the developed media was rated as "highly feasible" by media and subject matter experts. Classroom implementation received a "very good" response from students, who found it easier to comprehend the material. Furthermore, student learning outcomes improved significantly, with 100% successfully completing the post-test. The N-gain test results categorized the effectiveness of the simulation-based learning media as "moderate." Thus, this media has proven to be an effective and safe tool for enhancing students' understanding of AC electrical systems.
Analisis Kadar Aspal Optimum Pada Aspal Berpori Menggunakan Aspal PG-76 dan Serat Selulosa Perdana, Muhammad Gunawan; Pratikso; Mudiyono, Rachmat
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a19181

Abstract

Porous asphalt is an innovative solution in road pavement to reduce air retention and increase driving safety. This research aims to analyze the optimum asphalt content (KAO) in porous asphalt mixtures using PG-76 asphalt and cellulose fiber materials. PG-76 asphalt was chosen because it has high resistance to permanent cooling, while cellulose fiber is used to increase mix stability and reduce drain-down. The test was carried out using the Marshall method to determine the optimal KAO value based on stability parameters, flow, void content in the mixture, and abrasion resistance using the Cantabro test. The research results show that the use of PG-76 asphalt with the addition of cellulose fiber can improve the mechanical performance of porous asphalt mixtures, especially in increasing resistance to wear and maintaining a high void content. Thus, this mixture has the potential to be applied in road pavement to increase resistance to extreme weather conditions and optimize road drainage functions. The results of this research also provide recommendations for selecting materials and designing porous asphalt mixtures that comply with national and international technical specifications.
Kajian Stabilitas Konstruksi Culvert Bridge dalam Mitigasi Debit Banjir Kala Ulang 50 Tahun di Kawasan Industri Gas Kabupaten Barito Utara Saputra, Cahyo Agung; Maini, Miskar
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a19190

Abstract

Culvert bridges are an important part of industrial drainage systems that must be evaluated for stability. Construction stability is a crucial factor, especially in the gas industrial area of ​​North Barito Regency, which has an extreme risk of flooding. This research uses hydraulic and geotechnical analysis to evaluate the safety factors of culvert bridges from the hydraulic and construction stability aspects. The research results show that to flow the design discharge with a return period of 50 years (Q50) of 13.78 m³/s, a culvert with a diameter of 2.967 m is required. With the addition of 25% freeboard, the design diameter increases to 3.709 m. However, the materials available are two steel pipe units with a diameter of 3 m. Hydraulic calculations show that one culvert with a diameter of 3 m can carry a discharge of up to 15,047 m³/s, so two culvert units can accommodate 30,093 m³/s, far exceeding the design discharge. Meanwhile, the stability analysis results show a safety factor (SF) against overturning 5.98 and against sliding 4.473, both exceeding the recommended safe limits. Apart from that, the bearing capacity of the subgrade is also sufficient, with a maximum stress of 528.475 kN/m², still far below the allowable stress of 868.8582 kN/m². The results of this research confirm that the two culvert designs not only meet the hydraulic and geotechnical criteria. However, they can also effectively channel the designed flood discharge with a high level of safety.  
Analisis Penggunaan Fly Ash Tipe F pada Beton Non Pasir sebagai Green Concrete Purnamasari, Eka; Antonius; Setiyawan, Prabowo
Science Tech: Jurnal Ilmu Pengetahuan dan Teknologi Vol 11 No 1 (2025): Februari
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/st.vol11.no1.a19194

Abstract

The use of concrete as a construction material has become an industry standard; however, excessive exploitation of natural sand has had a negative impact on the environment. No-fines concrete has emerged as an innovative alternative to reduce dependence on sand, offering advantages such as a porous structure that enhances permeability and thermal insulation. This study analyzes the use of Type F Fly Ash, a byproduct of coal combustion from the Asam-Asam Power Plant in South Kalimantan, as an additive in no-fines concrete to improve its mechanical properties and durability. Fly Ash acts as a pozzolanic material, which can partially replace cement and enhance compressive strength and resistance to extreme environmental conditions. The research was conducted through a literature review and cement and Fly Ash testing. The results indicate that the increase in Fly Ash content affects the cement hydration reaction, necessitating the selection of an appropriate dosage tailored to specific construction project needs. The incorporation of Type F Fly Ash enhances ecological sustainability and concrete efficiency, while simultaneously reducing industrial waste and the environmental impact of cement production. Therefore, no-fines concrete based on Fly Ash presents a sustainable solution for environmentally friendly infrastructure development.

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