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3rd Annual Scientific Meeting on Medical Physics and Biophysics, PIT-FMB in conjunction with the 17th South-East Asia Congress of Medical Physics, SEACOMP 2019

作者： Fitriyah, N. Kurniawati, L.D. Purwanti, E. Astuti, S.D. Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya60115 Indonesia Biomedical Engineering Study Program Faculty of Science and Technology Universitas Airlangga Surabaya60115 Indonesia Department of Biomedical Engineering Post-Graduate Program Faculty of Science and Technology Universitas Airlangga Surabaya60115 Indonesia

This research aims to recognize the pattern of pulmonary disease on x-ray radiography image using artificial neural network (ANN) method. The images, which were used such as images of healthy pulmonary, pulmonary tuberculosis, and pulmonary tumour. Pattern recognition was using an extraction feature of GLCM (Gray Level Co-occurrence Matrix) and back propagation method. Before being identified, the images were processed by median filter and adaptive histogram equalization. The GLCM features that used were homogeneity, energy, contrast, variance and correlation. The parameters were learning rate and hidden layer. Learning rate was 0.3 and hidden layer was 25. Back propagation training showed 100% accuracy, which all of 44 images were used had been successfully identified. From the result, the healthy pulmonary showed 60% accuracy, 83.3% for pulmonary tuberculosis and 100% for pulmonary tumor. Hence, the overall result showed 81.25% accuracy, which 13 of 16 images had been successfully identified. From these result, extraction feature of GLCM using back propagation method was capable to recognize the pattern of pulmonary disease. However, due to narrow range of the feature, this application may not be used optimally for comparing features in every category of images. Therefore, the further research is needed to determine the best features and parameters of training back propagation. © Published under licence by IOP Publishing Ltd.

关键词： Pattern recognition

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Energy potential of fecal sludge in Indonesia

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AIP Conference Proceedings 2023年第1期2480卷

作者： Ibnu Fajar Gabriel Andari Kristanto Astryd Viandila Dahlan Environmental Engineering Study Program Civil Engineering Department University of Indonesia Margonda Raya Street Depok City 16424 Indonesia

The challenge of domestic waste water treatment, especially black water, starts from technology selection, collection, treatment, and by-product utilization. The objective of this research is to analyze the sanitation condition in Indonesia, particularly regarding toilets, and the potential of fecal sludge as energy. Data from Indonesian Family Life Survey 2014 (IFLS 5) become the basis for analysis of toilets and fecal sludge production. The data are projected from 2015 until 2030 with 5 years interval. The analysis results find that 74.3% of households already have improved toilets, 17.7% of households have unimproved toilets, and 8% of households do not have any toilet. Combination of statistical data on population and IFLS 5 data generate electrical energy value in urban and rural areas of 1,814.58 GWh/year, equivalent to the electricity needs of 1,680,167 people/year or 420,042 households/year, and energy of 113.00 GWh/year, equivalent to electricity needs of 104,630 people/year or 26,158 households/year. Then, the projection shows that the production of electrical energy continues to grow in line with the growth of proper sanitation facilities and handling of fecal sludge. This indicates that increasing proper sanitation facilities and handling of fecal sludge can contribute to the value of renewable energy sources in Indonesia.

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Land suitability analyze for cocoa development based on square root

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AIP Conference Proceedings 2023年第1期2596卷

作者： Nirmala Juita Husnul Mubarak Erwin Wijaya Emmy Fadhila Nurmaranti Alim Department of Soil Science Faculty of Agriculture Hasanuddin University Agriculture Engineering Study Program Faculty of Agriculture Hasanuddin University Program study of Agroecotechnology Faculty of Agriculture Sulawesi Barat University

Indonesia is the world's third-largest cocoa producer and exporter after Ghana and Pantai Gading. Cocoa is in great demand by people in various parts of the world because Cocoa can be processed into chocolate in food and drinks that benefit the community. One approach that is often used to evaluate cocoa land suitability is a parametric approach with a square root. The square root is part of the parametric approach in evaluating land suitability by assigning a value at a different limiting level to the nature of the land. On a standard scale, it is given a maximum weight of 100 to a minimum value of 0 then the land suitability class calculation is based on the square root. The stages of this research are: 1) Collecting secondary data and basic maps such as climate data, administrative maps, geological maps, soil type maps, and land use maps, 2) Making maps of land units 3) Preliminary surveys, 4) Sampling and analysis of soil samples in the laboratory, 5) analysis of the land and climate suitability, 5) Determination of actual and potential land suitability. The method used in this research is a parametric approach (Square root by Khiddir). The results showed that the parametric method's land suitability class (square root) was N1 (not suitable at present) at the observation points of profiles 1, 3, and 5. In contrast, the S3 land suitability class was found in profile 4. Limiting factors such as annual temperature, slope, soil depth, and coarse fragments are limiting factors that are difficult to repair. Base saturation and pH H2O with liming, or addition of organics.

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Developing indicators of green initiation and green design of green supply chain management in construction industry 2

Developing indicators of green initiation and green design o...

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2nd International Conference on Electrical engineering and Green Energy, CEEGE 2019

作者： Wibowo, Mochamad Agung Handayani, Naniek Utami Farida, Nur Nurdiana, Asri Department of Civil Engineering Faculty of Engineering Diponegoro University Indonesia Department of Industrial Engineering Faculty of Engineering Diponegoro University Indonesia Study Program of Civil Engineering Vocational School Diponegoro University Indonesia

Project is a set of interrelated activities and requires skills from different professions, and also project is involved the various of stakeholders in each phase of the Project Life Cycle. Implementation of Green Supply Chain in construction projects meant to bring the concept of eco-friendly in every process from the initiation phase, planning phase, the construction phase, and the operation and maintenance phase. It is necessary to identify indicators of green initiation and green design and how to explain the relationship between the role of initiation by the owner and the design process by a design consultant. This study aims to identify the indicators of green initiation and green design concept as part of Green Supply Chain. The method used for this study is a descriptive research that identifies and develop a framework for implementing green initiation and green design in construction industry that consists of concept, dimensions, elements, and indicators. GSCM in construction projects was determined by 9 indicators in the green initiation phase and 40 indicators in the green design phase. The success of green concept in construction project is very determined from these two phases as the beginning of the process, and the most important parties are the owners and design consultants. © 2019 The Authors, published by EDP Sciences.

关键词： Construction industry

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Management of excessive vibration on floor slabs system: A case study of Pt. Persero Pegadaian branch office of Oepura, Indonesia

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AIP Conference Proceedings 2024年第1期3034卷

作者： Don Gaspar Noesaku da Costa Christiani Chandra Manubulu Mauritius I.R. Naikofi Hendry Zacharias Jusuf Wilson M. Rafael Ria Rangga Bhajowawo Study Program of Civil Engineering Faculty of Engineering Universitas Katolik Widya Mandira Jl San Juan No.1 Penfui Timur Kupang NTT Indonesia East Nusa Tenggara Regional Settlement Infrastructure Center Jl. Polisi Militer No.1 Kupang Nusa Tenggara Timur Indonesia Study Program of Civil Engineering Politeknik Negeri Jl. Adi Sucipto PO. Box 139 Penfui Kupang NTT Indonesia Study Program of Architecture Faculty of Engineering Universitas Katolik Widya Mandira Jl San Juan No.1 Penfui Timur Kupang NTT Indonesia

Excessive vibrations on the floor slabs have an impact on the emergence of feelings of anxiety, worrying about the collapse of the building. From the results of visual observations, it was found that there is damage to the floor covering. This strongly indicates that there is a problem of deflection of the slab and/or floor beams, so this study is aimed at identifying the factors causing excessive vibrations on the floor slab, and recommending strategies and techniques for handling them. For this reason, the calculation of the frequency value of the floor plate vibration due to a combination of fixed and temporary loads acting on the building concerned. It was found that the natural fundamental frequency value of the existing slab is less than the standardized value i.e., 7.5 Hz. In addition, from the horizontal and vertical configuration of the building’s structural elements, it is known that the area of the floor slab that experiences excessive vibration is greater than 12 m2 so that the selected form of reinforcement is the addition of a structural column in the middle of the span of the main beam that supports the floor slab. Furthermore, a simulation of the calculation of the stability of the structure after the addition of the column is carried out. The simulation results show that the natural fundamental frequency value becomes greater than 7.5 Hz, i.e., 8,539 Hz. This proves that the excessive vibration on the floor slab is caused by a floor area that is too large so that the addition of a supporting column in the middle of the span of the main beam supporting the floor slab is proven to be able to eliminate excessive vibration.

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Renewable energy potential of rice straw and paunch manure as bioethanol feedstocks in Central Java, Indonesia

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Case Studies in Chemical and Environmental engineering 2024年 9卷

作者： Arianti, Forita Dyah Triastono, Joko Pertiwi, Miranti Dian Prabowo, Agung Prasetyo, Teguh Chanifah Haryanto, Bambang Megawati Astuti, Widi Djarot, Ira Nurhayati Santoso, Arif Dwi Wijayanti, Sri Peni Research Center for Sustainable Production System and Life Cycle Assessment National Research and Innovation Agency Banten 15314 Indonesia Research Center for Behavioral and Circular Economics National Research and Innovation Agency Jakarta 12710 Indonesia Chemical Engineering Study Program Faculty of Engineering E1 Building 2nd floor Semarang Negeri Semarang Semarang 50229 Indonesia

Almost all farmers are unaware that rice straw and paunch manure are potential feedstocks for bioethanol besides organic fertilizer, biochar, and biogas. Farmers' perceptions regarding the multiattributes of bioethanol development are still underestimated, indicating that farmers are still indecisive about the potential use of rice straw and paunch manure as feedstock for bioethanol. They still need extension and training to improve their knowledge. The Location Quotient (LQ) value of rice straw and cattle paunch manure is > 1, indicating that Karanganyar Regency could become a base for bioethanol development from rice straw and cattle paunch manure. © 2024 The Authors

关键词： Bioethanol Farmer's perception Location quotient Paunch manure Renewable energy Rice straw

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Wear of cylinder liner due to friction load of piston ring with various surface temperature

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AIP Conference Proceedings 2023年第1期2568卷

作者： I. M. Widiyarta I. M. Parwata M. R. Akbar E. F. Baryudha 1Study Program of Mechanical Engineering Faculty of Engineering Udayana University Bali Indonesia 2Magister of Mechanical Engineering Faculty of Engineering Udayana University Bali Indonesia

Wear on the cylinder liner as a combustion chamber is generally because of frictional loads by the piston rings. In addition, high temperatures that occur in the combustion chamber may accelerate the wear of the cylinder liner and shorten the service life of the cylinder liner. In this work, the wear test will be carried out on the cylinder liner of a diesel engine due to the friction load by the piston ring with various temperatures of the contact surface between the cylinder liner and the piston ring. The wear test is carried out on a linear reciprocating pin-on-plate wear test machine with the temperature of the contact surface varied from room temperature of 30 to 400°C. The results show the wear rate of the cylinder liner increases with increasing surface temperatures progressively. The wear mechanism occurs possibly by abrasive or adhesion wear and oxidation wear.

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Performance and Uncertainty Assessment of Green Roofs for Urban Flood Reduction in a High-Density Catchment in Ahmedabad, India

SSRN

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SSRN 2023年

作者： Bose, Tushar Arunkumar Kalbar, Pradip P. Mondal, Arpita Faculty of Technology CEPT University Navrangpura Ahmedabad380009 India Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Powai Mumbai400076 India Centre for Urban Science and Engineering Indian Institute of Technology Bombay Powai Mumbai400076 India Department of Civil Engineering Indian Institute of Technology Bombay Powai Mumbai400076 India

Urban flooding poses a significant challenge to the sustainability of rapidly growing Indian cities. Low-impact development (LID) strategies such as green roofs have shown the potential to reduce stormwater runoff and urban flooding worldwide with their ability to mimic natural hydrology. However, implementation of green roofs in practice is often hindered by the lack of agreement on their performance across different studies. Here, we present a performance assessment of green roofs based on building-level implementation scenarios, designed considering their feasibility, in a high-density urbanized catchment in Ahmedabad, India. We further analyse 1200 scenarios for 0-100% GR application at different storm durations and frequencies to understand the minimum GR application rate to reduce runoff effectively. Additionally, contributions of uncertainties in the catchment, green roof, and rainfall intensity parameters to the runoff reduction are quantified. Green roofs can reduce up to 62% flood volumes and 24% stormwater runoff. However, as a standalone strategy, they are reasonably effective only beyond 25% application rates. Further, rainfall intensity contributes significantly more than catchment or green roof parameters to the total runoff reduction uncertainty. These findings highlight the need for an integrated strategy combining LIDs and stormwater system upgradation. © 2023, The Authors. All rights reserved.

关键词： Catchments

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Digital twin for subsea pipeline corrosion monitoring location based on ILI-MFL pipeline operator forum and potentiodynamic test

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AIP Conference Proceedings 2024年第1期3076卷

作者： Ekha Panji Syuryana Muhammad Agus Kariem I. G. N. Wiratmaja Puja M. Irvan Maulana Uriyana Rizki Agus Doctoral Study Program Faculty of Mechanical and Aerospace Engineering Bandung Institute of Technology Bandung Indonesia Faculty of Mechanical and Aerospace Engineering Bandung Institute of Technology Bandung Indonesia Faculty of Industrial Technology Pertamina University Jakarta Indonesia Master Study Program Faculty of Mechanical and Aerospace Engineering Bandung Institute of Technology Bandung Indonesia PT Dago Energi Nusantara Bandung Indonesia

The limitation of subsea pipeline access coupled with limited personnel mobilization due to the COVID-19 pandemic has become a challenge in pipeline inspections. With these limitations, this study’s Inspection Data Management System (IDMS) was carried out by processing data from In Line Inspection-Magnetic Flux Leakage (ILI-MFL) to be developed into digital twin data initiation by simulating anomalies that occur using a potentiodynamic test. The analysis was carried out using the Pipeline Operator Forum (POF) diagram to map the corrosion morphology of the pipeline. Sampling is carried out using pipeline material API 5L-X42 which will form a certain corrosion morphology that represents pinhole, pitting, and general corrosion which is adjusted to the anomalies feature and metal loss depth from pipe tally in the form of length, width, and depth percent of the anomaly to the nominal wall thickness. Potentiodynamic testing was carried out using corrtest instrument 5.0, resulting in tafel polarization to define Resistance of polarization using a stern geary approach. The results are then analyzed to determine the material in resisting damage which shows corrosion rate (for general) and pitting rate (for pitting and pinhole) which is <0.02 mmpy for outstanding, 0.02-0.1 mmpy for excellent, 0.1-0.5 mmpy for good and 0.5-1 mmpy for fair. This digital twin method combined ILI MFL and Potentiodynamic testing to result in the type of anomalies, metal loss depth, dimension of anomalies from the results of the POF diagram, and determination of corrosion rate and pitting rate of API 5L-X42 material in the subsea pipeline.

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Dispersion of Surface Floating Plastic Marine Debris from Indonesian Waters Using Hydrodynamic and Trajectory Models

SSRN

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SSRN 2023年

作者： Kisnarti, Engki A. Ningsih, Nining Sari Putri, Mutiara R. Hendiarti, Nani Mayer, Bernhard Study Program of Oceanography Faculty of Engineering and Marine Science University of Hang Tuah Indonesia Research Group of Oceanography Institute Technology of Bandung Indonesia Deputy for Coordination of Environment and Forestry Management Coordinating Ministry for Maritime and Investment Affairs Indonesia Institute of Oceanography University of Hamburg Hamburg Germany

Plastic waste has become the most significant component of marine debris, while research on traces of marine plastic waste related to the condition of Indonesian waters is still limited. Therefore, this study examines the movement patterns of plastic marine debris in Indonesian waters. Simulations were carried out for one year (2013) using the HAMSOM hydrodynamic and Lagrange trajectory. The approach treated the simulated particles as conservative particles floating at sea. Even though the percentage is small (±16%), Indonesia contributes to transboundary marine debris in the Pacific Ocean, Indian Ocean, and the South China Sea due to the influence of the south equatorial currents moving from north and south of Indonesia. Most of the plastic marine debris remains in Indonesian waters (±80-84%) and moves back and forth due to the influence of the monsoon currents. Therefore, the Java Sea becomes a crossing point and accumulates plastic marine debris. © 2023, The Authors. All rights reserved.

关键词： Hydrodynamics

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