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Tangguh Okta Wibowo
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teknosains@ugm.ac.id
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teknosains@ugm.ac.id
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Gedung Lengkung, Unit 1, Lantai 2, Sayap Timur Sekolah Pascasarjana Universitas Gadjah Mada Jalan Teknika Utara, Pogung, Sleman- Yogyakarta Telp. (0274-564239 extc. 207)
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INDONESIA
Jurnal Teknosains
Published by Universitas Gadjah Mada
ISSN : 20896131     EISSN : 24431311     DOI : https://doi.org/10.22146/teknosains.xxxx
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknosains is a peer-reviewed journal which began publication in 2011, and published each semester in June and December. It is a series of scientific publications in engineering, science and technology area. Jurnal Teknosains aims to encourage research in Science and Technology studies. Topics addressed within the journal include but not limited to: Engineering, which is divided into several topics: Mechanical Engineering, Industrial Engineering, Biomedical Engineering, Chemical Engineering, Nuclear and Physical Engineering, Civil Engineering, and Planology. Basic Sciences, which is divided into: Chemistry and Physics Health Sciences, which is divided into: Medical, Biotechnology specially in Health Science, and Dentistry
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 224 Documents
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Marginalized community effort to improve environmental quality of poor settlement along riverbank Paulus Bawole; Haryati Sutanto
Jurnal Teknosains Vol 12, No 2 (2023): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.79456

Abstract

Currently, many people live in urban areas and more than 30% of them live in slums or squatter settlements. Urbanization is one of the most transformative trends occurring worldwide, especially in developing countries like Indonesia. At present, more than half of the total population in Indonesia lives in urban areas. The dominance of the urban population shows the urgency to make the urban environment inclusive, safe, resilient, and sustainable as it is intended to be realized through Goal No. 11 - SDGs 2030. Cities require large spaces and are a major source of wealth and centers of innovation, culture, and politics. The urban area has become the most important arena for people, including low-income communities that live in informal urban spaces that develop spontaneously. This article will share research experiences on the settlements of marginalized communities. With the help of several institutions, the communities are trying to improve the quality of their settlements to become inclusive, safe, resilient, and sustainable. The method used in this research is the descriptive-qualitative method exploring the potential and resources within urban kampong to improve the quality of urban poor settlements. With the discovery of informal urban space patterns and community efforts to improve the quality of their settlements, a sustainable development strategy can be developed to improve urban areas inhabited by low-income people.
Uji komparasi desinfektan septalkan, terralin, dan alkohol 70% terhadap daya sterilisasi permukaan kursi dental Arif Andriyanto; Risma Dwi Irfanto; Heribertus Dedy Kusuma Yulianto
Jurnal Teknosains Vol 12, No 2 (2023): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.79820

Abstract

Cross-infection has the potential to occur in the Dental and Oral Hospital due to cross-transmission of pathogenic microbes through dental chair surfaces that are contaminated with microbes. This  study aims to compare the effectiveness of three types of disinfectant Septalcan, Terralin, and 70% alcohol on the inhibition of pathogenic microbes originating from the oral cavity of patients who contaminate the surface of dental chairs in aerosol and non-aerosol clinics. Sampling of microorganisms was carried out using the technique of wiping/swab the surface of dental chairs in aerosol and non-aerosol clinics before and after the disinfection process with three types of disinfectants. The decrease in the number of germs before and after the disinfectant process is used as a parameter for the effectiveness of the disinfectant. The results of the one-way ANOVA statistical test shows that there is no significant difference in the effectiveness of the three types of Septalcan, Terralin, and 70% alcohol in reducing the number of germs on the surface of dental chairs. The three types of disinfectants are able to minimize the risk of cross-infection due to pathogenic microbial contamination on the surface of the dental chair.
Kajian kualitas air dan strategi pengelolaan Rawa Jombor, Klaten, Jawa Tengah Rina, Timotius Ragga; Purnama, Setyawan; Nugroho, Andhika Puspito
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.55560

Abstract

Rawa Jombor is a semiartificial reservoir whose contruction are works for serving the needs of irrigation in the dry season and as a floading control in the rainy season. Rawa Jombor also used for fish farming and floating restaurant by the community. The existence of the cages and floating restaurant can have a negative impact to the aquatic environment due to the disposal of waste and leftover food and metabolism that is deposited at the bottom of the water. This study aims to analyze the water quality, pollution levels and to develop a management strategy of Rawa Jombor. Water quality is measured at 9 sampling point determined by purposive sampling based on the use of Rawa Jombor. Pollution level is analized uses pollution index and the management strategy uses analytical Herarchy Process. The results show that Rawa Jombor has decreased water quality marked by several parameters that do not meet the class III of water quality standards according to Government Regulation No. 82 of 2001. Rawa Jombor is included in the category of mildly polluted in areas without activity, floating restaurant and fish cage for water allotment class I, II, III and IV with an average pollution index ranging from 1,02 to 2,886. To maintain the continuity of the Rawa Jombor, a management strategy with priority on the economic aspects is needed with the development of the Rawa Jombor for sustainable fisheries.
Microsoft building footprint application To detect human exposure due to tsunami Saragi, Andes; Mardiatno, Djati; Hizbaron, Dyah Rahmawati
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.79526

Abstract

Tsunami events at night are more prone to causing fatalities because humans are resting in residential buildings (houses). In this study, residential buildings were extracted using the Microsoft Building Footprint (MBF), which resulted from applying artificial intelligence technology. This study aims to analyze the number of people exposed to tsunamis at night using MBF. The tsunami modeling was carried out using the Berryman method. Sentinel 2-A Image extracted from Google Earth Engine. The results of the inundation modeling analysis show that the total inundated area is 717 Ha or 17.34% of the total area. The results of the MBF accuracy analysis on the entire data are a Precision of 99.02%, Recall of 98.40%, and F1 score of 98.71%. The results of the MBF error analysis are False Positive 0.97%, False Negative 1.60%, and Intersection of Union 0.12%. The number of people exposed is 2,749, or 6.32% of the total population.
Evaluasi kapasitas masyarakat tangguh bencana di kawasan rawan erupsi gunung api merapi Fahmi, Wikan Amarudin; Hizbaron, Dyah Rahmawati
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.80157

Abstract

Disaster events have become a national issue, one of the reasons is that Indonesia is crossed by a series of volcanoes, such as Merapi Volcano. It erupted back in 2010 and caused massive impact, especially at Kepuharjo Village, Sleman Regency, Yogyakarta. This research is intended to identify the capacity of community resilience due to the Merapi Volcano eruption at Desa Kepuharjo, Kabupaten Sleman. The study collects primary data from interviews and questionnaires from unit samples of Kepuharjo Village using simple random sampling techniques. The data collected from the modified version of the questionnaire were processed using scoring techniques and analyzed using descriptive frequency. The research revealed that the questionaire to capture capacity that generally employed are not fully compliant to be used at the research area. Overall, the questionaire able to capture to assess the capacity classification which are medium (the capacity achievement is comprehensive but not significant to reduce the impact of the disaster) and high ((the capacity achievement is comprehensive and there is a commitment between the government and the community). Kepuharjo Village is classified into classes of 3-5 with a percentage of 65%. Efforts to increase capacity have been carried out by the government, assisted by the community, both by establishing institutions, physical mitigation, and non-physical mitigation. 
Impact of land use changes on the tsunami hazards in part of coastal Kebumen Pamungkas, Bagus; Mardiatno, Djati; Retnowati, Arry
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.80954

Abstract

This research was conducted to analyze land use change from 2016 to 2022 and their impact on the tsunami hazard zone on the coast of Kebumen Regency. For land use change analysis, remote sensing, geographic information systems (GIS), and statistical tests were applied to Sentinel-2A satellite imagery. The tsunami hazard was simulated using tsunami inundation modeling based on land use spatial data and DEMNAS processed using GIS. Land use changes occurred significantly in the study area, especially in Mirit District. The Southern Cross Road (JJLS) and coastal morphological conditions influence land use change patterns. Land use changes impact changes in the tsunami hazard zone, especially in the use of fir forests and shrimp ponds. The research findings can be used as input for developing a tsunami disaster mitigation plan and detailed spatial planning on the coast of Kebumen Regency.
Analisis daya tampung beban pencemaran sungai bedadung Jember menggunakan software wasp Novita, Elida; Bisri, Moch. Imron Mustofa; Pradana, Hendra Andiananta
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.81383

Abstract

The distribution of pollution sources from domestic, agricultural, and industrial activities has the potential to reduce the water quality of the Bedadung River, thereby negatively impacting its self-purification. The aim of this research is to model the parameters, specifically the values of Biochemical Oxygen Demand (BOD) and Total Suspended Solid (TSS), and to determine the river's capacity to carry the pollution load using the Water Quality Analysis Simulation Program (WASP). The input parameters for this study include BOD, TSS, and water discharge data collected at 21 monitoring points along the Bedadung River, with the river water sampling technique employing the grab sampling method. The output validation of the modeling is assessed using the Root Mean Square Error (RSME) equation, and the research results indicate that the water quality modeling with WASP software effectively reflects the dynamics of BOD and TSS parameters in the Bedadung River, as supported by an average output validation value of 9%. The pollution load capacity values for the Bedadung River in the Patrang - Ajung segment are found to be 361.48 kg/day for BOD and 5368.31 kg/day for TSS. The positive values suggest that the Bedadung River still has the capacity to naturally degrade organic pollutants.
Pengaruh faktor pengali asimetri terhadap kapasitas beban angkat perempuan Indonesia Kurnianingtias, Mayesti; Ardiyanto, Ardiyanto
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.82631

Abstract

Manual material handling can improve occupational diseases such as low back pain and musculoskeletal disorders. In an attempt to reduce the risk of injury as a result of such work, NIOSH published the recommended weight limit (RWL) equation. The RWL formulation was made with Europeans and Americans, so this research was conducted to see the suitability of the RWL formulation for Asians, especially Indonesians. The participants of this study were 30 Indonesian women students. The independent variable in this research is the asymmetry multiplier. The participants perform asymmetric lifting in 0, 30, 60, and 90 degrees with the frequency of 1 lift/min in a 30-minute duration. Other multiplier factors such as the vertical multiplier, distance multiplier, and coupling multiplier are made to have a value of 1. The weight of the load lifted by the respondent is adjusted to the maximum load that each respondent can lift comfortably, which is usually called the maximum acceptable weight of lift (MAWL). The heart rate data used for analysis is the heart rate in the last five minutes. In addition, respondents also filled out the Borg RPE scale. The results of this study were that the heart rate increased from an average resting heart rate of 83.12 beats/minute to 90.6 beats/minute. The statistical test results showed that there was no significant effect between asymmetry lifting tasks on heart rate, energy expenditure, and the Borg's Scale RPE (α = 0,05). Energy expenditure in this study is still below the threshold set by NIOSH. From this study, the predicted AM equation of physiological for Indonesian (energy expenditure) is AM = 1 - (0,0024A) and the predicted AM equation of RPE is AM = 1 - (0,0029A).
Combination effectiveness of glucomannan and moringa oleifera leaf extract on lipid profil of hypercholesterolemia rats Wati, Dini Prastyo; Setyaningsih, Endang
Jurnal Teknosains Vol 13, No 1 (2023): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.82693

Abstract

cholesterol levels in the blood. This study aims to determine the effectiveness of the combination of glucomannan (Amorphophallus muelleri Blume) and Moringa oleifera leaf extract on the lipid profile of hypercholesterolemic Wistar rats. This research design used True experimental with a pretest-posttest control group design. The animal used in this study was 24 male Wistar rats (Rattus norvegicus) aged 8 weeks divided into 2 control groups and 6 treatment groups of glucomannan and Moringa oleifera leaf extract. The results of this study showed that there were significant changes in TC, TG, LDL-C, and HDL-C levels (p<0.05). It can be concluded that the combination of glucomannan (Amorphophallus muelleri Blume) and Moringa oleifera leaf extract can change the lipid profile effectively in the P5 (80mg/kgBW GAmB: 120mg/kgBW MoEL) and P4 (120mg/kgBW GAmB:80mg/kgBW MoEL ) as the most influential group in reducing TG, TC, LDL-C levels and increasing HDL-C levels.
Impacts of temperature and coating pigment ratios on the corrosion rate of ss400 steel Budiarto, Untung; Firdhaus, Ahmad; Hakim, Muhammad Luqman; Tuswan, Tuswan; Yusuf, Fauzan Ammar Fata
Jurnal Teknosains Vol 13, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.85518

Abstract

Steel is the primary shipbuilding material; however, it erodes quickly. Adequate protection requires hard, durable, and adhesive coatings. This study examines how aluminium-graphite pigment and heat treatment affect epoxy-coated SS400 steel plate corrosion, adhesion, and coating resilience. This study used a 1:1 and 3:1 pigment ratio with 100°C and 150°C heat treatment. The coating layer was 250 μm thick and comprised 80% epoxy and 20% aluminum-graphite. The maximum adhesion strength, 19.62 MPa, was achieved with an aluminium-graphite pigment ratio of 1:1 and 100°C heat treatment. The top coating resistance was 6.86 Joules under identical conditions. The lowest corrosion rate, 0.047 mmpy, was at a 3:1 aluminum-graphite ratio and 150°C heat treatment. This discovery has significant consequences for shipbuilding steel corrosion resistance.

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