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Tangguh Okta Wibowo
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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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Dampak pembangunan Yogyakarta international airport di daerah rawan bencana tsunami dengan dukungan sistem informasi geografis Ilham Satria; Djati Mardiatno; Evita Hanie Pangaribowo
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.72609

Abstract

The construction of a new airport in tsunami disaster prone area in Kulon Progo Regency has been impacting in land use and land value. The changes in land use will impact on changing tsunami hazard model. This research aims to analyze the impact of a new airport on physical changes and land value changes in Temon District with geographic information system. The research begins with inventory of spatial data from various agencies. Multi-temporal image interpretation is resulted in 2015 and 2020 land use maps. Physical changes and tsunami models analysis were carried out using spatial analysis in ArcGIS. The making land value change maps using 2015 and 2021 land value zone maps. The analysis effect of new airports and tsunami hazard using multiple linear regression. Data validation was carried out by sampling techniques and field surveys. The results of spatial analysis is physical growth from 2015-2020 covering an area 418,019 m² and loss of a built area 149,261 m². The changes in the tsunami model from 2015-2020 increased by 118,740 m². The changes in land value from 2015-2021 is increasing the average value of Rp. 1,317,088/ meter² or 652%. The results of multiple linear regression analysis and community interviews concluded that the existence of an airport is very influential on increasing land value compared to the effect of tsunami vulnerability.
Optimasi unjuk kerja pada sistem pendinginan adsorpsi dengan siklus pemanasan-ulang kombinasi I Gusti Agung Bagus Wirajati; Putu Wijaya Sunu; Ida Ayu Gede Bintang Madrini; Ni Kadek Muliati
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.73676

Abstract

The adsorption refrigeration system is a cooling system that offers several benefits, including being environmentally friendly due to the very small amount of global warming effect given, the lack of potential for ozone depletion, the low energy consumption of its operation, the low heat source used in its operation and good for reducing gas emissions on earth. This paper describes a combined reheating adsorption refrigeration system with three heat exchangers, as well as operating modes. The operation of the adsorption refrigeration system with combined reheating is schematically described with operational modes and diagrams. This adsorption cooling system is made up of three heat exchangers (H), one evaporator, and one condenser. The combination cycle is intended for heat exchanger systems that operate in a reheat cycle (H1 and H2) and a non-reheating cycle (H3). This paper also discusses system cycle time optimization. Research to get the optimum value of cycle time in this system is still rarely done and therefore optimization of cycle time is carried out on the system to get the best performance. The PSO (particle swarm optimization) program is paired with the MATLAB program to simulate the performance of the system under discussion while also enhancing its performance. The goal of this work is to use simulation to determine the optimal system performance versus the overall cycle time, which includes adsorption/desorption time, pre-cooling and pre-heating time as well as mass recovery time. Getting the best value for the entire cycle time is made possible by fusing the simulation of the system's process performance with performance optimization. As a results, the greatest increase in the optimization results' performance value occurs at a heat source temperature of 55ºC with a longer time to achieve optimal performance.
Flash flood (Δ) risk and damage assessment in batu, East Java Dekka Dhirgantara Putra; Bahrul Fikry Sofwany; Hukma Zulfinanda; Iqbal Kamaruddin
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.78483

Abstract

Hydrometeorological disasters are showing an increasing trend in Indonesia. Flash floods are part of a hydrometeorological disaster that has a significant livelihood impact. Flash Flood is triggered by the intensity of extreme rain, several actions of mitigation can be taken by early warning systems, hazard and risk mapping, community preparedness, and climate change adaptation. So, how does future land use have an impact, and how much loss will result from the flash flood disaster in Batu City? The hydrometeorological disaster that occurred in Indonesia was the Batu Flash Flood. The Flash Flood occurred on November 4, 2021. The flash flood has a lot of impact on many locations, including the Bumiaji District and Junrejo District. Based on the disaster history recorded, the flash flood in Batu has only happened once, but the impact was quite big because there are many houses in the midstream of Bulukerto. Based on the losses caused, this can be the basis for efforts to control the spatial pattern of Batu City in the future. The methodology used in this study is risk assessment. While the risk study related to delta (Δ) the study of flash floods risk in spatiotemporal prevention uses the 2030 spatial plan for delta prediction (Δ), which can later predict the consequences of climate change and meteorological disasters from flash floods in Batu. The results of this study are the delta (Δ) of flash flood risk and the damage assessment of the flash flood that occurred in Batu. 
Architectural typology of water infrastructure: Case study of green open space and heritage site of perigi pekasem in Bangka Belitung Reza Arlianda
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.78507

Abstract

Indonesia as the top 10 countries in extensive groundwater extraction, has fallen behind in providing basic water services infrastructure. While the water utility in Indonesia only provides 35.15% coverage nationally. As case, Bangka Belitung as the lowest province in water management provision with only 17.26% coverage faces tremendous sustainable issues because of its massive exploitation of water usage for domestic, industrial, and especially tin mining activities. Indeed, in spite of fact that water infrastructure is always an essential part of the history of the built environment such as the Roman aqueduct, India’s Stepwell, and Nasqa Puquio. In Indonesia has shown that the number of architectural studies focused on improving the water services is small. In response to Sustainable Development Goals number 6 on clean water and sanitation, this study aims to contribute and mainstream the discussion of green infrastructure in the architecture discourse by analyzing and identifying its typology and design elements using the heritage-built environment of Bangka Belitung’s perigi as the case study. The result of identified design elements and typology on the cultural landscape can further be used to enrich the architecture discussion and design vocabulary on Indonesian cities’ urban fabric and contribute to the expected achievement progress on sustainable development goals. 
Impact of slum upgrading to river water quality in Yogyakarta city, Indonesia Endar Rohmadi; Masahiko Sekine; Bakti Setiawan
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.78952

Abstract

Due to a lack of proper sanitation services, the disposal of residential wastewater from slum areas has become one of the river pollution contributors. In Yogyakarta slums were concentrated along the riverbanks of the Winongo, Code and Gajahwong rivers. Due to slum upgrading, slums have declined from 264.5 ha to 114.72 ha between 2016 and 2020. This research aims to determine the correlation between slum upgrading and river water quality. The data was acquired from the Government of Yogyakarta City, Indonesia, and examined using ten water parameters from 2013 to 2021. Using Pearson Correlation Coefficient and Spearman Rank, it was found that population density positively correlated with Total Coliform and Fecal Coliform (p<0.05). It was also seen that the slum ratio showed a positive correlation with BOD, COD, TSS, pH, and NH3-N (p<0.05). The number of WWTP had a positive correlation with PO4-P (p= 0.037), whereas the number of connected houses to WWTP reported a positive correlation with P04-P (p=0.028). In addition, a significant decrease in BOD, COD, NH3-N, pH, and TSS were found using the Paired t-test and the Wilcoxon Signed-Rank test. (p<0.05). Slum upgrading notably reduced organic pollutants and suspended solids. However, the performance of WWTP did not perform a maximal contribution to reducing PO4-P and Coliform; therefore, it is necessary to improve the performance. This study might be used to enhance the river and urban management in Yogyakarta City.
Pengembangan teknologi tangki pintar sebagai sistem peringatan dini bencana kekeringan Adhy Kurniawan; Galih Setyawan; Pratama Tirza Surya Sembada; Geradus Nieken Sabian
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.69216

Abstract

According to the National Disaster Management Agency, in 2021 there were 5,402 incidents recorded, one of them being drought disasters. During the drought, the availability of clean water was minimal, so clean water assistance came from other areas. The problem that is often encountered in the field is delays in water distribution assistance due to sudden information and the location of the aid is in areas that are difficult to reach. This research developed a water tank technology equipped with a sensor to provide information about water availability, the location of the tank placement to speed up information on dropping water in drought areas. This technology uses the NodeMCU ESP8266 module which functions as a microcontroller, to provide sensor-based information that detects the quantity and quality of water as well as the location of the tank. This system is based on the Internet of Things (IoT) and Blynk Android which makes it easier for people to get information in real time. The water availability indicator is presented in a three-color graphical display, namely green is a safe sign (sufficient water), yellow is a warning sign (water is reduced), and red is a sign that water availability is running low and it is necessary to drop clean water. Other information presented is water quality parameters such as pH, TDS, turbidity, and temperature as well as the location of the tank. This technology supports the achievement of SDGs, namely goals number 6 (clean water and proper sanitation) and 11 (sustainable cities and settlements).
Pengaruh faktor kerentanan fisik dan sosial akibat erupsi gunung merapi terhadap ketercapaian sdgs dan irbi Muhammad Reza Aristo; Dyah Rahmawati Hizbaron
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.76613

Abstract

The purpose of this study was to identify the influence of physical and social vulnerability factors due to the eruption of Mount Merapi in Yogyakarta. Furthermore, this study identifies the significance of physical and social vulnerability to the achievement of the SDGs in Yogyakarta. The achievement of SDGs number 11 is supported by indicators of the percentage of the number of dead or missing victims to the total number of disaster events, disaster risk index, regional resilience index, number of resilient villages/kelurahan that have been formed, integrated early warning system, and availability of contingency plans. The achievement of SDGs number 13 is further explained using a simple indicator, namely greenhouse gas emissions. In this case, the research contribution is expected to add an indicator explaining the achievement of SDGs number 13 in addition to climate change. This study uses IRBI (Indonesian Disaster Risk Index) data to indicate the achievement of disaster risk reduction in the research area. The achievement of the SDGs, which has increased every year, certainly has positive implications for handling vulnerable groups. The location of this research study is the District of Turi. Turi sub-district is important to be studied considering the current conditions and potential future exposure to the eruption of Mount Merapi. This study utilizes the Analytical Hierarchy Process (AHP) technique to determine the weight of the indicators used in vulnerability modeling. The research data were tested using statistical analysis of data normality, probabilistic Poison, and the two-way ANOVA effect test. The results showed that there was no influence of the variables of physical vulnerability and social vulnerability on the existing SDGs. The conclusion of the research on the effect of physical and social vulnerability factors on the eruption of Mount Merapi Volcano shows that there is no influence of the value of physical and social vulnerability in Turi District on the achievement of SDGs in the form of the DIY Disaster Risk Index
Perkembangan kota banda Aceh pasca bencana tsunami 2004 Raja Al-Fath; Agam Marsoyo
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.77549

Abstract

Every city keeps growing as a result of population growth and has an impact on space requirements. Same as Banda Aceh City which continues to grow, but its development has stopped due to the 2004 tsunami disaster. Residential areas tend towards the north or the coast, which is tsunami-prone zone. The purpose of this study is to describe the direction and built-up area development of Banda Aceh City after the tsunami from 2005-2011, 2011-2015, and 2015-2020. The data used in this study is spatial data such as maps and satellite images sourced from Banda Aceh planning and development agency. Data analysis uses spatial approach with the overlay method. Development of the built-up area of Banda Aceh city based on the period 2005-2011, 2011-2015, and 2015-2020 shows that the built-up area leads to the northern and southern parts of Banda Aceh City. Development of the northern part of the city, Districts of Jaya Baru, Meuraksa, Kuta Raja, Kuta Alam, and Syiah Kuala was a result of the rehabilitation and reconstruction efforts such as housing, roads, and facilities after tsunami and turned the ponds and vacant land into housing and service trading areas. The northern part of Banda Aceh City was tsunami hazard-prone zone. Meanwhile, development of the southern part of the city, districts of Banda Raya, Lueng Bata, and Ulee Kareng, was influenced by Mohamad Hasan and Ali Hasyimi street which triggered the development of residential areas, office areas, service trading areas, and public facilities. Southern part of the city was not directly affected by the tsunami disaster. In addition, built-up area development has spread to the Aceh Besar regency.
Cultural landscape function of informal urban settlement in East Nusa Tenggara Roosna Maryani Octaviana Adjam; Imam Buchori; Wakhidah Kurniawati
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.77673

Abstract

The theme of cultural landscape function becomes very important along with the awareness to create a balance of ecological and social landscape functions in urban areas. Urban settlement strongly influences cultural function, both as a form of landscape and demographic characteristics. This paper aims to examine the existence of several important social values in urban settlement landscapes and the role of landscape features in influencing social values aspects of informal residents such as social cohesion, recreation, sense of place, spiritualism, cultivation, and business activities. The research method used is a mixed quantitative and qualitative method by using observations, questionnaires, and interviews for data collection based on a sociological approach with community members. Questionnaire data were collected for further analysis in which the Spearman coefficient was used to examine the relationship between social values and landscape features. The results revealed that residents in Airmata and Manutapen have different percentages of social values in terms of their landscape features, and it can also be seen that the values of social cohesion, sense of place, and local business present a stronger relationship to landscape functions. These results show the importance of social values in informal societies as a potential approach to achieving sustainable landscape management.
Community interest in developing tourist villages based on neuroscience methods Imam Indratno; Chusarini Chamid; Tonny Judiantono; Vermanda Maharani Sonya; Nurrhisma Yuniar
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.78610

Abstract

Rawabogo Village is one of the tourist villages in Bandung Regency with insignificant development since its establishment. Community participation is important in the stages of development. However, measuring context in real time and accurately is generally difficult. Neuroscience can be used to control the validity and subjectivity of the questionnaire and interview methods used to examine neural responses to tourism conditions. Thus this study aims to identify the people of Rawabogo Village's interest in developing a tourism village based on neuroscience methods. The results of the data analysis show that the people of Rawabogo Village have a strong interest in developing a tourist village. The result is indicated by the entropy value obtained and the results of the questionnaire scoring. The neuroscience method in tourism village development acts as a method that supports, complements, and validates existing tourism village development concepts or methods such as Community Based Tourism (CBT).

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