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Mathematical Model of Traffic Speed and Capacity in the Archipelago Base

IOP Conference Series: Materials Science and engineering 2021年第1期1125卷

作者： A. Gaus T. Y. S. Muhammad U. S. H. Ambo N. Liska Civil Engineering Study Program Faculty of Engineering Universitas Khairun

The transportation engineering developing who the application of the principal use planning, analysis and design to the disciplines comprising transportation: its vehicles, physical infrastructure, safety in travel, environment impacts and energy usage. The mathematical model in base archipelago was not much enough to research by transportation practiced. It had been of characteristic which different mainland. This paper using greenshields and greenberg models for approach real condition of the base archipelago. In the transportation involves working with the businessman, with industry, with citizen group, with elected officials, and with employes to the joint each segment of the public strip depended on at least one constructed facility. In this time there three components that included the discussion of the traffic of a microscop scale were flow, density and speed. At the greenshields model, the speed-density relationship show whose the value of speed higher than value of density lower with determination value 0,9755 where the curve of flow-density relationship show the value determination 0,8634 and for curva of flow-speed relationship showing whose maximum value of flow 1807 vehicles/hour at the value traffic speed 46 km/hour, traffic speed which at the lower or it the higher, so it condition given impact that the value of flow will going to low. on the other hand for greenberg model at speed-density relationship's determination 0,9463, density-flow relationship show that the value minimum of density is 25 vehicles/km while value of flow is 1400 vehicles/hour and the relationship between flow-speed curve show that value maximum flow 1750 vehicles/hour with value speed 37. Base the value of each condition, so the greenshields model was better than greenberg model for this research. The mathematical model of the traffic flow which approach the real condition for the base archipelago was greenshields model.

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Assessment of ripeness analysis of information technology supervision on DS and ME domains using COBIT 4.1 in the information engineering department of Musamus Merauke 1

Assessment of ripeness analysis of information technology su...

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1st International Conference of Interdisciplinary Research on Green Environmental Approach for Sustainable Development, ICROEST 2019

作者： Prayitno, A. Rahayu, T.K. Sumaryanti, L. Efendi, A. Department of Informatics Universitas Musamus Merauke Indonesia Civil Engineering Study Program Universitas Muhammadiyah Buton Indonesia

Information technology plays an essential role in the business world because it may affect the operations of the organization within the organization that also uses information technology to provide information. One of the departments that use information technology is the Information engineering Department of Musamus Merauke University, which is used to provide information related to the Department of Information engineering. But in the use of information technology is still flawed. Therefore, it is necessary to have a standard in information technology management to measure overall standards and governance in information technology management, ie using COBIT. Based on this study, we will design an information technology management model for the Department of Information engineering. Control objectives for information and related technologies (COBIT) are 4 (4) primary domains, including domains, planning, and organization (PO), acquisition and implementation (AI), transmission and support (DS) and tracking. And evaluating (ME) in research. This will use two domains, namely the delivery domain and support (DS) and monitoring and evaluation (ME) by adjusting the problems and requirements of the information engineering department in the arrangement. Information technology support for information technology service processes and support for monitoring and evaluation of information technology, the results showed that the level of maturity of information technology supervision in the information engineering department is at level 2. Therefore, information technology in the engineering department Information must be updated to the expected level. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Information use

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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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Setting time and compressive strength of geopolymer concrete with variations in the addition of cement

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AIP Conference Proceedings 2024年第1期3098卷

作者： Yayan Adi Saputro Jati Widagdo Syamsul Arifin Sa’dullah Assa’idi Nimas Aulia Pambajeng Miftahunnajah Abdul Talib Bon Civil Engineering Program Study Faculty of Science and Technology Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Product Design Program Study Faculty of Science and Technology Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Management Program Study Faculty of Economics and Business Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Islamic Education Management Study Program Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Balekambang Polytechnic Jepara Jepara Indonesia Professor of Technology Management Faculty of Technology Management and Business Universiti Tun Hussein Onn Malaysia Parit Raja Johor Malaysia

The increasing demand for cement in the world of construction can have an extraordinary effect, especially in the production of cement which produces CO2. So we need an alternative material as a substitute and even replace the role of cement. Utilization of coal waste in the form of fly ash is in the spotlight to be maximized. Therefore this research was conducted as an alternative contribution to the solution using geopolymer concrete in terms of setting time and compressive strength with variations in the addition of cement. The method used is experimental in the laboratory which produces qualitative data for further numerical calculations. Tests focused on the setting time and compressive strength of concrete using 5 mix designs with cement variations ranging from 10%, 20%, 30%, 40% of the use of fly ash. The results of the setting time with the highest duration, namely 100% FA=1.5, 95 minutes initial setting time and 225 minutes final setting time, then decreased to the lowest duration, namely 60% FA: Pc 40%=1.5. The initial setting time is 15 minutes and the final setting time is 37 minutes. The highest concrete compressive strength results in the MD 4 mix design with 70% FA mixture: Pc 30%=1.5, which is 43.3 MPa. While the lowest compressive strength is the design mix MD 1 with a mixture of 100% FA=1.5 of 21.8 MPa.

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Time series modeling by using exponential smoothing technique for river flow discharge forecasting (case study: Cabenge, Walanae, and Cenranae rivers system)

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IOP Conference Series: Materials Science and engineering 2021年第1期1088卷

作者： Melly Lukman Benyamin Tanan Civil Engineering Study Program Paulus Christian University of Indonesia

The exponential smoothing technique is a time series modelling technique that can be used for forecasting. This technique is very important for use in hydrology to determine trends and predict future river flow conditions. In this study, 4 Exponential Smoothing Techniques were analyzed, namely Single Exponential Smoothing, Double Exponential Smoothing, Double Exponential Smoothing (Winters), and ARIMA to predict the flow of the Cabenge river on SWS Walanae - Cenranae. From the results of the study of the four Exponential Smoothing Techniques, Triple Exponential Smoothing (Winters) Of the 4 ES Techniques analyzed in this study, Triple Exponential Smoothing (TES) provides a more accurate forecasting value than Single Exponential Smoothing (SES), Exponential Smoothing Dual Smoothing (DES), and the Autoregressive Difference Moving Average (ARIMA). Triple Exponential Smoothing (TES) has smaller error values for MAPE, MAD, and MSD than SES and DES, and the comparison of forecasting discharge with measured discharge values shows a KN value of 93%. To predict the flow of the Cabenge river in SWS Walanae - Cenranae it is recommended to use the Triple Exponential Smoothing (Winters) Technique.

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Optimum compressive strength of geopolymer concrete in variations comparison of ingredients and mixing time

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Journal of Physics: Conference Series 2021年第1期1858卷

作者： Suhendro Trinugroho Rina Septia Ningrum Civil Engineering Study Program Muhammadiyah Surakarta University Indonesian

Concrete has been criticized more recently because of the greenhouse gas (carbon dioxide) emissions it produces in the cement portland production process. With these considerations, a new concrete binder called geopolymer concrete was developed. One of the materials used in the manufacture of geopolymer concrete is fly ash. Using fly ash as a substitute for cement is considered to be able to preserve the environment and reduce development costs. In this study, the specimen used was cylindrical, with a diameter of 15 cm and a height of 30 cm. The concrete compressive strength test was carried out at the age of 28 days. Variations in concrete testing include: Test the strength of the concrete on the variation of the binder ratio: coarse aggregate of 20%:80%, 25%:75%, 30%:70%, 35%:75% 40%:60% and the variation of stirring time 5 minutes, 7.5 minutes, 10 minutes, 15 minutes. From the test results, it can be concluded that the optimum mixing time for the concrete mix is 7.5 minutes. If it is less than 7.5 minutes it will result in less than maximum binder binding power. And if the mixing time is more than 7.5 minutes it will decrease the adhesion of the binder. Regarding the variation of concrete on the amount of use of fly ash, it can be concluded that the higher the fly ash content, there is a tendency for low compressive strength, this is due to the influence of the water content used in the mixture is obtained based on the weight of fly ash in each variation. So if the weight of fly ash is higher, the water demand will also be higher and it will result in too dilute fresh concrete, so that the compressive strength of the concrete decreases.

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Reclaiming Resources from Disposable Diapers: Closing the Loop with Hydrothermal Carbonization and Water Reuse

SSRN

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SSRN 2024年

作者： Djaenudin Putra, Herlian Eriska Muchlis Wresta, Arini Indriati, Lies Sintawardani, Neni Fitria, Novi Hamidah, Umi Purwanta, Wahyu Permana, Dani Setiawan, Arief Ameir Rahman Putri, Ganiz Amaranthi Nilawati, Dewi Widyarani KST Dr. Samaun Samadikun Jalan Sangkuriang No. 21 D Bandung40135 Indonesia Collaborative Research Center for Zero Waste and Sustainability Jl. Kalijudan No. 37 Surabaya60114 Indonesia Department of Chemistry Sekolah Tinggi Analis Bakti Asih Bandung40192 Indonesia Jalan Raya Jakarta-Bogor KM. 46 Cibinong Bogor16911 Indonesia Selatan Tangerang15314 Indonesia Environmental Engineering Study Program Faculty of Civil Engineering and Planning Institut Teknologi Nasional Jalan P. H. H. Mustofa No. 23 Bandung40124 Indonesia

Disposable diapers have become an overwhelming component of municipal waste streams, exemplified by Bandung's staggering daily influx of approximately 1,451,024 diapers into landfills in 2021. Hydrothermal carbonization (HTC) emerges as a potential solution for the valorization of this problematic waste, transforming it into hydrochar, a key ingredient for environmentally-conscious briquettes. However, HTC's reliance on substantial water resources underscores the urgent need for efficiency strategies. This study investigates water recirculation as a strategy to promote resource conservation within HTC while processing disposable diapers. Key process parameters—temperature (200–250 °C), residence time (15–45 minutes), and single-pass recirculation—were systematically varied to assess their impact on hydrochar characteristics. Results demonstrate that higher temperatures, longer residence times, and recirculation can enhance hydrochar heating value and energy densification ratio, albeit with yield and energy yield trade-offs. The highest values for yield (20.88%), calorific value (8,247.57 cal/g), energy densification ratio (1.359), and energy yield (25.08%) were obtained under specific conditions. © 2024, The Authors. All rights reserved.

关键词： Water conservation

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Investigation of the immersion resistance of the HRS-WC mixtures with applying static loading

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Journal of Physics: Conference Series 2021年第1期1858卷

作者： S Sunarjono N Hidayati A Magfirona AD Prakoso Civil Engineering Postgraduate Program Universitas Muhammadiyah Surakarta Indonesia Civil Engineering Study Program Universitas Muhammadiyah Surakarta Indonesia

The inclusion of rainwater often compounds the damage to the road before reaching the plan life through the surface and shoulders of roads. This can lead to the release of aggregates and exfoliation of asphalt on the surface layer. The study aims to determine the level of road durability against the Marshall, volumetric, and durability properties of the HRS-WC mixture. The study used various static loading 100 Kpa, 150 Kpa, and 200 Kpa with immersion. In the immersion method, there are two differences, namely, immersion with and immersion without loading. The test objects' loading using a simple and economical test tool utilizes the beams and iron cylinders obtained from the laboratory, testing using Marshall Test. The results of the analysis obtained the durability of unloading soaked value higher than the load. The analysis results showed that the durability of the mixture was soaked seven days with a load of 100 KPa was 77.40%, for 150 Kpa amounted to 52.02%, and for 200 KPa, which is 47.67%. Analysis results showed a 7-day immersion value with a cumulative load of 68.38%, while analysis results showed a seven day immersion value with periodic loading of 75.43%.

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Response of load-displacement on cubical sample of Oil-Palm shell with fly ash concrete using digital image correlation system

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AIP Conference Proceedings 2021年第1期2376卷

作者： Akhmad Dhannu Deltanto Nuraziz Handika Bastian Okto Bangkit Sentosa Civil Engineering Study Program Faculty of Engineering Universitas Indonesia Depok Indonesia

Oil-Palm industry produces some side products as solid waste which consist of 23% empty oil palm bunches, 6.5% oil palm shell, and 13% fiber from the main products. Reusing oil palm waste is very important to increase economic value and reduce potential pollution. One of the ways to exploit Oil Palm Shell (OPS) byproduct is to substitute the uses of natural coarse aggregate in concrete structure as building material. study on the use fly ash as one of the admixtures to increase OPS concrete compressive strength has been conducted. Digital Image Correlation (DIC) as a method of displacement response measurement was applied. Fujifilm XA-3 was used as primary camera to capture the image with speed of 3 frames per second (fps). An open source 2D-DIC, Ncorr v1.2 and MatLab student version of R2020a were used. The obtained average compressive strength is 25 MPa, the average of stiffness of the specimens is 946.95 kN/mm and the average of Poisson Ratio is 0.22 (range 0.21-0.22).

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The dependable flow analysis for irrigation intake using satellite-based Global Precipitation Measurement (GPM) in the Jratun Seluna River Basin

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AIP Conference Proceedings 2023年第1期2596卷

作者： Khafidzotun Ni'mah Hanggar Ganara Mawandha Yekti Anggun Eka Dariyanti Lalu Marhayani Kesuma Chandra Setyawan Ngadisih Ngadisih Department of Agricultural and Biosystem Engineering Universitas Gadjah Mada Yogyakarta 55281 Indonesia Department of Civil Engineering Janabadra University Yogyakarta 55231 Indonesia Engineer Professional Study Program Universitas Gadjah Mada Yogyakarta 55281 Indonesia

The water availability in the river basin possesses essential benefits for human life, habitats, energy, and farming. As the river basin collects and stores inland water runoff from rainfall, it keeps a maintainable river discharge or so-called a dependable flow. As an extensive irrigation system in central java, the Jratunseluna river basin provides water for 257 thousand hectares of irrigation, with the river basin's area 9.896 km2. In this case, the dependable flow used for irrigation intake's design needs to be analyzed. However, as a ground-based instrument is used and a point-based measurement, the accuracy may depend on the number of devices deployed on the ground. On the other hand, the Global Precipitation Measurement (GPM) collects extensive spatial data in one observation cycle at near-real-time. Here, the use of satellite data looks like the main challenge dealing with a large-scale area target. This study aims to analyze the accuracy of satellite-based data related to rainfall amount used as an input to calculate the dependable flow compared to the analyses generated from the ground-based data. The study uses the Mock model with the calibrated parameter obtained from the observed flow data from 2010 to 2020. The model was developed under two scenarios; the rain gauge models and the GPM models. This study uses the GPM-IMERG specification with a time resolution of 1 day and a spatial resolution of 0.1° x 0.1°. The results show that the estimated dependable flows under two conditions are comparable to the observed data regarding the correlation coefficient, RMSE, and NSE scores. The best result of the statistical tests for the correlation coefficient, RMSE, and NSE obtains 0.75 m3/s, 3.60, and 0.70 for the rain gauge model and 0.75 m3/s, 3.30, 0.80 for the GPM model, respectively. Through this study, the use of satellite-based GPM data is expected to be more extensive to support modern agricultural management activities.

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