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Comparison of resource assessment methods with numerical reservoir model between heat stored and experimental design: Case study Ciwidey-Patuha geothermal field 7

Comparison of resource assessment methods with numerical res...

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7th ITB International Geothermal Workshop 2018, IIGW 2018

作者： Ashat, Ali Pratama, Heru Berian Itoi, Ryuichi Department of Earth Resources Engineering Faculty of Engineering Kyushu Univ. Fukuoka819-0395 Japan Geothermal Engineering Study Program Institut Teknologi Bandung Jl. Ganesha No.10 West-Java-Bandung Indonesia

A successful geothermal field size assessment requires integrative data analysis of all aspects to determine the optimum capacity to be installed. Nowadays, numerical simulation becomes a powerful tool in a geothermal resource assessment process. However, this method involves significant uncertainty of subsurface information as an input. Then a study of resource assessment methods, such as heat stored and experimental design, needs inputs coming from the result/output of reservoir numerical. The calculation of both methods based on a range of reservoir parameter values can be carried out using stochastic methods (Monte Carlo Simulation). It applies a probabilistic method of resource assessment to capture uncertainties. A sophisticated numerical reservoir model of Ciwidey-Patuha Geothermal Field, West Java-Indonesia in the natural state condition was used as a case study to determine the generating potential of the reservoir. © Published under licence by IOP Publishing Ltd.

关键词： Geothermal fields

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Correlation between digital literacy and environmental literacy of 11th-grade students

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AIP Conference Proceedings 2024年第1期3106卷

作者： Mimien Henie Irawati Al Muhdhar Shinta Amrul Khoirina Muhamad Arjuna Salim Racy Rizky Abdillah Diana Hernawati Diki Muhamad Chaidir Muhammad Iqbal Akbar Lely Mardiyanti Mohammad Qodri Department of Biology Faculty of Mathematics and Sciences Universitas Negeri Malang Malang East Java Indonesia Department of Biologi Education Universitas Siliwangi Tasikmalaya Wesst Java Indonesia Department of Electrical and Informatics Engineering Faculty of Engineering Universitas Negeri Malang Malang East Java Indonesia Study Program of Biological Education Universitas Jambi Jambi Indonesia SMA Negeri 1 Batu Batu East Java Indonesia

The rapid development of technology, information, and communication requires students to master digital literacy. In addition, the rapid development of technology also affects environmental conditions, so it is necessary to master environmental literacy to understand and interpret environmental conditions, as well as build students’ awareness of environmental issues. This study aims to determine the correlation between digital literacy and student environmental literacy. The population in this research includes 11th-grade students of SMAN 1 Batu. The research sample amounted to 102 students, and the sampling technique used was purposive random sampling. Data were collected through digital literacy questionnaires, environmental literacy questionnaires, and environmental literacy tests. The data were tested for normality and homogeneity prerequisites and then analyzed using the Pearson Correlation statistical test. The results obtained show that the average digital literacy score of students is 105.1, including the high category, and the average student environmental literacy score is 279.7, included in the medium category. The high level of digital literacy will make students more critical in accessing technology and digital media. Digital literacy includes the process of finding, using multiple sources, evaluating, and using information to produce original products, with the maximum application of digital literacy, which is expected to support students’ environmental literacy in providing knowledge, understanding, and building an attitude of caring for the environment. The data obtained shows that there is a positive relationship between digital literacy and environmental literacy.

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The effect of roof surface area on the quality and quantity of rainwater runoff in the rainwater harvesting system

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IOP Conference Series: Earth and Environmental Science 2021年第1期623卷

作者： K Faza N Suwartha Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok Depok 16424 Indonesia

Rainwater harvesting system is one of the alternative sources of clean water supply to be used during the dry season. The purpose of this research was to analyze the effect of roof area on the quality and quantity of rainwater runoff and determine the potential of rainwater runoff based on quality standards. The observation was conducted 2 different times and collected 23 samples of rainwater runoff from 11 different roof areas. Daily rainfall intensity data during the observation period were analyzed to estimate the quantity of rainwater runoff discharges from the rooftop catchment area. The results showed that parameters that meet the clean water quality standard are turbidity, iron, manganese, nitrate, and nitrite in both observation time. While the color, pH, TDS, and E. coli exceeds the clean water quality standard. The highest rainwater runoff volume was 20.59 m3 for the first week and the second week was 14.06 m3. In conclusion, the rooftop catchment area significantly affects the quantity and quality of rainwater runoff, and potentially be used as a clean water supply through a simple water treatment unit.

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Optimization of mechanical properties of bioplastics with the addition of ZnO and glycerol plasticizer

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IOP Conference Series: Earth and Environmental Science 2021年第1期712卷

作者： I A Widhiantari A F Hidayat D A Setiawati Study Program of Agricultural Engineering Faculty of Food and Agroindustrial Technology University of Mataram Indonesia

Bioplastics are an alternative to conventional plastics that have been used in society. The advantage of bioplastics is that they are easily degraded in nature because they come from easily renewable materials such as starch which comes from plants. However, biodegradable plastics have shortcomings in terms of tensile strength so that additional supporting materials are needed in their manufacture. Optimization using the Response Surface Methodology (RSM) central composite design (CCD) in this study aims to obtain optimal mechanical properties (tensile strength). The independent variables used in this study include ZnO concentrations (3%, 6%, and 9%) and glycerol concentrations (2 ml, 5 ml, and 8 ml) as well as mechanical properties such as tensile strength and elongation in response. The optimum conditions were obtained at a concentration of ZnO 6.99% and glycerol 5.32 ml with a tensile strength value of 1.58456 MPa and 9.082201% elongation.

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The NDVI algorithm utilization on the google earth engine platform to monitor changes in forest density in mining area

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IOP Conference Series: Earth and Environmental Science 2021年第1期886卷

作者： Munajat Nursaputra Siti Halimah Larekeng Nasri Andi Siady Hamzah Forestry Study Program Faculty of Forestry Hasanuddin University Makassar Indonesia Forest Engineering Study Program Faculty of Forestry Hasanuddin University Makassar Indonesia Forest Conservation Study Program Faculty of Forestry Hasanuddin University Makassar Indonesia

Periodic forest monitoring needs to be done to avoid forest degradation. In general, forest monitoring can be conducted manually (field surveys) or using technological innovations such as remote sensing data derived from aerial images (drone results) or cloud computing-based image processing. Currently, remote sensing technology provides large-scale forest monitoring using multispectral sensors and various vegetation index processing algorithms. This study aimed to evaluate the use of the Google Earth Engine (GEE) platform, a geospatial dataset platform, in the Vale Indonesia mining concession area to improve accountable forest monitoring. This platform integrates a set of programming methods with a publicly accessible time-series database of satellite imaging services. The method used is NDVI processing on Landsat multispectral images in time series format, which allows for the description of changes in forest density levels over time. The results of this NDVI study conducted on the GEE platform have the potential to be used as a tool and additional supporting data for monitoring forest conditions and improvement in mining regions.

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An opportunity for using constructed wetland technology in hospital wastewater treatment: a preliminary study

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IOP Conference Series: Materials Science and engineering 2022年第1期1212卷

作者： A G Akhmad S Darman Aiyen W Pingkan S. Hamsens S. Hamsens Faculty of Engineering Tadulako University Palu Central Sulawesi Indonesia Doctoral Study Program of Agriculture Postgraduate of Tadulako University Palu Central Sulawesi Indonesia.

The problem faced by many hospitals in Indonesia is the low efficiency of Waste Water Treatment Plant (WWTP) hospitals. If it does not get the attention, it will have an impact on health and environmental pollution. Various technologies have been used but experienced many obstacles. Constructed wetlands based on aquatic plants that have been used in developed countries are very prospects of being developed in regions such as Indonesia with a tropical climate. A preliminary study is needed with the first step to investigate the quality of hospital wastewater in Palu City, Indonesia, as a sample. This study aims to obtain a description of hospital wastewater characteristics and to evaluate the performance of the hospital WWTP in Palu. Data collection was done by taking data indirectly through laboratory test results during 2015-2019. Tabulating data using Excel software to illustrate statistics, then presented in the form of bar charts, interpreting according to the quality standards. Investigation results showed that the characteristics of hospital inlet wastewater in Palu are parameter values varying with four high concentration parameters: total coliform, TSS, Ammonia Nitrogen, and COD. The efficiency level of WWTP hospitals in Palu is relatively low in removing pollutants.

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Identification of the quality of premium and non-premium rice based on physical characteristics using artificial neural networks and digital image processing

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AIP Conference Proceedings 2024年第1期3065卷

作者： Endah Sekar Palupi Riries Rulaningtyas Toetik Rahayuningsih Ahmad Yudianto Department of Forensic Science Postgraduate School Department of Health Faculty of Vocational Studies Universitas Airlangga Surabaya Indonesia Biomedical Engineering Study Program Department of Physics Universitas Airlangga Surabaya Indonesia Criminal Law Department of Law Faculty of Law Universitas Airlangga Surabaya Indonesia Department of Forensic Medicine and Medicolegal Faculty of Medicine Universitas Airlangga Surabaya Indonesia

Counterfeiting of quality rice was rife in Indonesia. This research was conducted to develop technology to identify differences in premium and non-premium rice quality based on pre-existing digital images. Artificial neural networks and digital image processing methods to identify premium and medium (non-premium) rice quality were applied in this research. Statistical analysis of this study used the SPSS program. This research is observation-type research. This research design uses an artificial neural network with uses 3 layers, namely the results of shape feature extraction on the metric, eccentricity, area, and perimeter parameters as input or input layers, hidden or hidden layers, and premium rice and non-premium (medium) rice as output or output layers. This research uses 52 images as training and 20 images as testing. The obtained image was taken at a distance of 25 cm. This research showed that the results of training using artificial neural networks (ANN) on 52 images obtained an accuracy of 92%. The test results using 20 images obtained 95% accuracy, 63.33% sensitivity, and 10% specificity. Based on statistical analysis using the Mann-Whitney test, it obtained the asymph value. Sig (2-tailed) < 0.05 indicates the difference between premium and non-premium rice using metric, eccentricity, perimeter, and area parameters.

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Effects of slurry concentration and rotational speeds of drum drier to the characteristics of pregelatinized breadfruit (Artocarpus altilis) flours 1

Effects of slurry concentration and rotational speeds of dru...

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1st International Conference on Mechanical Electronic and Biosystem engineering, MEBSE 2018

作者： Sunarti, T.C. Sinaga, W.S.L. Pandji, C. Department of Agroindustrial Technology Faculty of Agricultural Engineering and Technology Bogor Agricultural University Indonesia Program Study of Food Science Faculty of Science and Technology University of Pelita Harapan Tangerang Indonesia

Breadfruit is one alternative carbohydrate source in Indonesia. However, breadfruit is seasonal and climacteric crops;it should be processed immediately to produce flour. Native breadfruit flour has many limitations since it is difficult to be solubilized and swollen in cold water. The flour is modified physically by pregelatinization to improve its properties. Pragelatinized breadfruit flour can be used as instant food, porridge, and baby food. This research is aimed to investigate the effect of slurry concentration (20 and 30%) of native breadfruit flour and rotational speeds (4, 6 and 8 rpm) of double drum drier to the chemical composition and physico-chemical properties of the pregelatinized flours. The results showed that pregelatinization did not influence to the chemical composition. Pregelatinization of the flour improved the water solubility and swelling power on room (30°C) and hot (70°C) solutions, reduced the freeze-thaw stability, caused partial gelatinization which is monitored by losing the birefringence of starch granule, and darkened the flour. The pregelatinization also reduced the gelatinization temperature and had low final viscosity. Low concentration of slurry and low rotation speed of drum increased the gelatinized part of the flour, which is influenced to the cold and hot water solubility. © Published under licence by IOP Publishing Ltd.

关键词： Solubility

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Role of green building developer and owner in sustainability construction: Investigating the relationships between green building key success factors and incentives 3

Role of green building developer and owner in sustainability...

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3rd International Conference on Eco engineering Development, ICEED 2019

作者： Berawi, Mohammed Ali Basten, Van Latief, Yusuf Crévits, Igor Civil Engineering Department Faculty of Engineering Universitas Indonesia Kampus Baru UI Depok16424 Indonesia Program of Civil Engineering Study Institut Sains Dan Teknologi Pradita Scientia Business Park Tower i Tangerang Gading Serpong Indonesia Laboratoire d'Automatique de Mécanique et d'Informatique Industrielles et Humaines Université de Valenciennes et du Hainaut-Cambrésis Le Mont Houy Valenciennes Cedex 959313 France

Adaptation to the concept of sustainability is a problem in developing countries, especially in terms of the level of knowledge, economic capability, environmental conditions, and regional policies. These four aspects become exogenous variables in this study to examine the role of green building concepts in sustainable concepts in building construction. Qualitative and quantitative methods become a way to prove the hypothesis of this study by using SEM-PLS as an analysis tool. The sample in this study limits the building developers and owners to assess aspects that affect the sustainability of the green building concept and obtain an overview of the incentive models they expect. The results of this study indicate the level of knowledge of building developers and building owners affects the ability of building management to achieve a sustainable concept. Besides, the aspect of sustainability has an impact on the acquisition of both internal and external incentives for developers and building owners. Specific incentive models that developers and owners expect are accelerating licensing and building certification and reducing property tax. The government also supports the provision of property tax compared to value-added tax because it is a controlling tool in implementing green building concepts. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Sustainable development

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Green building incentive model during design recognition to ensure the reliability of green building operation and maintenance achievement 3

Green building incentive model during design recognition to ...

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3rd International Conference on Eco engineering Development, ICEED 2019

作者： Berawi, Mohammed Ali Basten, Van Latief, Yusuf Crévits, Igor Civil Engineering Department Faculty of Engineering Universitas Indonesia Kampus Baru UI Depok16424 Indonesia Program of Civil Engineering Study Institut Sains Dan Teknologi Pradita Scientia Business Park Tower i Gading Serpong Tangerang Indonesia Laboratoire d'Automatique de Mécanique et d'Informatique Industrielles et Humaines Université de Valenciennes et du Hainaut-Cambrésis Le Mont Houy Valenciennes Cedex 959313 France

A low number in green building development cause the building construction will have an immense direct and indirect impact on future generations. This paper identified the optimum incentive model driving the building efficiency achievement in green building operation and maintenance. Critical factors that influence building consultant and contractor decision in green building design and construction toward the operation and maintenance achievement planned were analysed using partial least square structural equation modelling (PLS-SEM) methods. Precisely, the study modelled the regional policy affecting building efficiency achievement in the developing country. This research already identified the way of green building stakeholders' operations and maintenance in the capital city of Indonesia. Quantitative method using case study analysis already validated for the questionnaire data. The PLS-SEM indicated that sustainable in green building implementation and sustainability has significant causal effects on the regional policy of building the life cycle. Among these factors, tax exemption, expedited permit, and floor to area ratio were significant. The regional policy indicators in green building implementation have the most significant effect on building efficiency achievement. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Developing countries

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