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Drainage analysis by applying the rational method on flood discharge

AIP Conference Proceedings 2024年第1期3070卷

作者： Adam Safitri Nono Carsono Lia Amaliah Yunita Rosdiana Dewi Civil Engineering Study Program - Sekolah Tinggi Teknologi Cirebon Cirebon Indonesia

The construction of the Kuningan East Ring Road is the construction of a new road that aims to relieve congestion by dividing continuous traffic on the 7.2 KM Cirebon-Kuningan road. To anticipate the occurrence of puddles on the road, road facilities in the form of drainage are needed. This study was carried out in four stages, namely site surveys, problem identification, data collection, and data analysis. Data obtained were in the form of primary data and secondary data which were then analyzed according to the needs of the study. For the hydrological analysis, rainfall data were acquired from two rainfall stations, namely Lame Dam Station in Ciniru Village and Linggarjati Station, for a span of 10 years from 2012 to 2021. Calculation of the maximum rainfall area applied the Algebraic Average Method, with obtained average rainfall for the last 10 years being 978 mm. Furthermore, the analysis of rainfall intensity using the Mononobe Equation attained result of 84.199 mm/hour. The analysis of flood discharge using the Rational Method obtained a design flood discharge of 0.187 m³. Meanwhile, the channel planning and cross section used U-Ditch DS 3 with dimensions of 1.10 m x 1.25 m and a channel capacity of 0.580 m³/second. Based on the calculation results, it can be concluded that the channel capacity is greater than the design flood discharge. Thus, the drainage planning requirements have been met.

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Comparative Analysis of the Influence of Different Preparation Methods on the Properties of TEMPO-Oxidized Bacterial Cellulose Powder Films

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Journal of Natural Fibers 2024年第1期21卷

作者： Rahmadiawan, Dieter Shi, Shih-Chen Abral, Hairul Ilham, Mohammad Khalid Sugiarti, Eni Muslimin, Ahmad Novi Ilyas, R.A. Lapisa, Remon Putra, Nandy Setiadi Djaya Tainan Taiwan Department of Mechanical Engineering Universitas Negeri Padang Sumatera Barat Padang Indonesia Laboratory of Nanoscience and Technology Department of Mechanical Engineering Andalas University Sumatera Barat Padang Indonesia Research Collaboration Center for Nanocellulose BRIN-Andalas University Padang Indonesia Serpong Banten Indonesia Weaponry Technology Study Program Defense Technology Faculty Indonesia Defense University Bogor Indonesia School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Johor Bahru Malaysia Heat Transfer Laboratory Department of Mechanical Engineering Universitas Indonesia Depok Indonesia

The preparation method of cellulose films plays a vital role in their properties. This work aims to characterize 2, 2, 6, 6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized bacterial cellulose powder (TOBCP) films prepared with three different methods (casting, boiling-casting, and boiling-vacuum). It is found that film by casting (CT film) shows the best electrical properties. A light-emitting diode (LED) in a direct current circuit connected to the CT film glows the most brightly. However, this film had lower tensile strength and thermal stability than films from boiling and boiling-vacuum techniques. The boiling-vacuum film presents the most compact fiber structure and the highest tensile and thermal properties. This film also shows the lowest electrical properties and the dimmest LED light. These results demonstrate the TOBCP properties from different methods that can be used to prepare film with desirable properties. © 2024 The Author(s). Published with license by Taylor & Francis Group, LLC.

关键词： Light emitting diodes

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The profile of pempek as a determining factor of quality, originality and ethnicity

The profile of pempek as a determining factor of quality, or...

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International Conference on Science and Technology Applications 2019, ICoSTA 2019

作者： Supriadi, A. Saputra, D. Priyanto, G. Baehaki, A. Pambayun, R. Doctoral Stud. at the Faculty of Agriculture Universitas Sriwijaya Indonesia Agricultural Engineering Study Program Faculty of Agriculture Agricultural Product Technology Study Program Faculty of Agriculture Fishery Product Technology Study Program Faculty of Agriculture Universitas Sriwijaya Palembang30139 Indonesia

Pempek is a traditional ethnic food originated from Palembang, South Sumatra, Indonesia. Currently, there is not exist any profiles which could be used as a determining factor for quality, originality, and ethnicity of pempek. The objective of this research was to obtain the chemical profile of pempek as a determining factor of quality, originality and ethnicity. The samples were collected from the ten famous branded vendors in Palembang. The fish used in making pempek of the samples are snake head fish, Spanish mackerel, and the mix of snake head and Spanish mackerel. The type of pempek used in this experiment was steamed cook pempek lenjer (cylindrical) type. The analysis was performed at a KAN accredited laboratory. It was found that the energy content of pempek used in this experiment was in the range of 125 to 160 kkal/100 g sample and all the pempek used had a 0% of fat. All pempek used had 17 types of amino acid, and all of them had an essential amino acid. The significant finding was that the concentration of glutamic acid was 200% of the concentration of common concentration which indicated that all the vendors used artificial mono-sodium glutamate to improve the taste of pempek. It was concluded that the chemical profile found on this research could be used as database for creating a standard of identity of pempek. © Published under licence by IOP Publishing Ltd.

关键词： Fish

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Campus parking II characteristics analysis at Toraja Christian University in Indonesia

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AIP Conference Proceedings 2023年第1期2736卷

作者： Parea Rusan Rangan Ermitha Ambun Rombe Yulieanti Mapaliey Yohans Sunarno Gersony Miri Zain Patongloan Zwengly Lodi Honta Jufri Manga Juliah Bumbungan Nober Palelleng Civil Engineering Study Program Faculty of Engineering Universitas Kristen Indonesia Toraja Tana Toraja South Sulawesi Indonesia

The need for parking space would grow in tandem with the number of students, employees, and lecturers, particularly at the Indonesian Christian University Toraja’s Campus II, but owing to poor parking management, vehicles parked in the approved parking area may have problems. Students who use irregular parking areas, which occurs because the parking lot or unit that has not been created only provides a parking area, the second problem is parking alley lanes that are not per the needs, the alley is still very narrow and does not have this free space, which causes problems for vehicles going in and out of the campus II of the Indonesian Christian University Toraja. The parking characteristics method was used to examine this data; nevertheless, the parking characteristics method is still broken down into various sections, including parking accumulation, parking volume, parking index, number of parking users, and parking availability. Parking accumulation to determine the maximum accumulation during the research period, parking volume to determine the volume of parking capacity to determine whether the parking area can still accommodate vehicles or not, and parking index to determine the percentage of comparison between total vehicles at a given time interval and the volume of available parking spaces. The availability of parking is determined by the number of parking cells available in one area or parking lot each hour, whereas the level of parking usage is determined by the number of parking users that occur in one parking plot per hour. The analysis found that the parking area and basement on campus II of the Indonesian Christian University Toraja have 1151 parking space units (SRP) for two-wheelers and 28 SRP for fourwheelers, with a maximum number of parking vehicles for two-wheeled vehicles of 893 units with a parking index of 77, 59 percent and maximum parking of 21 units for four-wheeled vehicles with a parking index of 75 percent, indicating that the parking ar

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SPH modelling of tsunami wave impact on low-rise structures

SPH modelling of tsunami wave impact on low-rise structures

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2020 Virtual International Conference on Coastal engineering, vICCE 2020

作者： Pringgana, Gede Cunningham, Lee S. Rogers, Benedict D. Civil Engineering Study Program Faculty of Engineering Udayana University Jalan Kampus Bukit Jimbaran Badung80361 Indonesia Department of Mechanical Aerospace and Civil Engineering The University of Manchester ManchesterM13 9PL United Kingdom

This study examines the influence of low-rise structure orientations on tsunami-induced impact force. The particular focus is on low-rise structures since these often make up the majority of building stock in tsunami prone areas and are usually most vulnerable. The meshless method smoothed particle hydrodynamics (SPH) is used for simulating the tsunami flow. Multiple cube structures named A, B and C were arranged at different angles of rotation and were situated on a flat shore. Four cases were simulated with variation on the number of structures and orientation toward the tsunami direction. Case 1 comprises a single structure (SS) C without rotation (R=0°) and used as the baseline, Case 2 contains multiple structures (MS) A, B and C without rotation (R=0°), Case 3 includes multiple structures (MS) A, B and C with 30° rotation (R=30°), and Case 4 consist of multiple structures (MS) A, B and C with 45° rotation (R=45°). The simulations show that for a 2-solitary wave train the front structures generated a flow focusing effect that accelerated the bore velocity. The orientation of the multiple structures to the direction of the oncoming tsunami bore significantly affected the magnitude of the applied force, where the most effective structure orientation is provided by the 45-degree rotation. The results of this study emphasize the potential for improving tsunami resilience through appropriate positioning of structures. Importantly, such large reductions in force may provide an economic solution to building resilience in developing countries prone to tsunamis. © 2020 American Society of civil Engineers (ASCE). All rights reserved.

关键词： Tsunamis

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The effect of urban tourism on an urban economy (the case of Malang Municipality)

The effect of urban tourism on an urban economy (the case of...

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2019 International Conference of Science and Applied Geography, ICOSAG 2019

作者： Nurfitriya, I.D. Iskandar, D.A. Urban and Regional Planning Study Program Faculty of Engineering Universitas Gadjah Mada Yogyakarta Indonesia

As the economy of cities grew at unprecedented rate, urbanites' changing perceptions of the way they see urban space-the city as an entertainment machine-creates a challenge that becomes the background for this study. Malang urbanized area is chosen as the unit of observation due to its potentials as the site for urban tourism development. New tourism icons and economic activities continue to emerge which begs the question as to why such things exist in Malang. Primary and secondary data are garnered through field observation, in-depth interview and from government policy related to tourism development. Mixed method is employed to reveal the effects of tourism sector development on the economic growth of the city. The findings indicate strong correlation between the two;however, cautionary note should be taken as there are many external factors beyond tourism sector development which affect the economic growth of Malang urban area during the observed period. Culinary activities create direct impact as seen through the increase of locally-owned revenues while thematic neighbourhood tourism development affects the local economy and informal sector. © Published under licence by IOP Publishing Ltd.

关键词： Economic and social effects

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Social Media Engagement as Mediator: Does Content Vividness Predict Purchase Intention?

Social Media Engagement as Mediator: Does Content Vividness ...

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International Conference on Business and Industrial Research (ICBIR)

作者： Wachyu Hari Haji Shandy Aditya Afifa Qurrota Ainin Sri Susilawati Islam Management Department BINUS Entrepreneurship Center Bina Nusantara University Jakarta Indonesia Digital Business Study Program Faculty of Economics State University of Jakarta Jakarta Indonesia Faculty of Business Sampoerna University Jakarta Indonesia Faculty of Engineering & Technology Sampoerna University Jakarta Indonesia

This study examines Instagram influencers' social media behavior and providing suggestions for increasing engagement and purchase intentions towards endorsed products via post-effectiveness. Several objectives will be raised in this study: (1) determining the effect of content vividness on social media engagement, (2) determining the impact of social media engagement on purchase intentions, (3) determining the effect of content vividness on purchase intentions. This quantitative study utilizes Partial Least Square (PLS) software as a tool to test validity and reliability and SPSS to test the hypothesis and regression model. With the total of 199 valid respondents participating into this study's survey, the result highlights the positive effects of content vividness in enhancing purchase intentions through mediating variable, namely social media engagement.

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Delivering blended learning for generation Z: When will we be ready?

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AIP Conference Proceedings 2023年第1期2590卷

作者： Andian Ari Anggraeni Febrianto Amri Ristadi Culinary Sciene Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia Mechanical Engineering Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

Teaching and learning have shifted from synchronous meetings in the classroom and laboratory to virtual synchronous and asynchronous meetings. Teaching and learning can take place anytime and anywhere. The availability of ICT infrastructure is one of the supporting factors for teaching and learning in today's Education 4.0. This article describes the availability of ICT facilities to support blended learning. Accidental sampling was conducted on 56 lecturers of the faculty of engineering, Universitas Negeri Yogyakarta (UNY), who participated in a webinar and filled out polls. The polls revealed that nearly 72% of respondents had subscribed to Internet Service Providers and cellular data packages. Total respondents who own laptops or PCs with Intel Core i3 / AMD Ryzen 3 processor specifications were only 23%, yet a mere 4% still own lower processors specifications. Cloud-based software provided by UNY, such as Microsoft 365, was only used by 46% of respondents. The availability of facilities to support virtual synchronous meetings included headset 96%, Zoom educational license 86%, and interactive application 18%. In contrast, facilities to support asynchronous meetings were owned only by less than 60% of respondents, including condenser or clip-on microphone types, graphic pads, video editing software, screen recording software, and project management software. Facilities to support collaborative asynchronous activities such as Google Workspace were applied by 66% of respondents. The availability of ICT facilities supporting teaching and learning is an indicator of readiness for Education 4.0, and this study shows it needs to be improved.

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Catalytic cracking of used cooking oil using Chromium impregnated charcoal (Cr-charcoal) catalyst 6

Catalytic cracking of used cooking oil using Chromium impreg...

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6th International Conference on Mathematics, Science, and Education, ICMSE 2019

作者： Nazarudin Prabasari, I.G. Ulyarti Susilawati Oktadio, A. Chemistry Engineering Study Program Faculty of Engineering Universitas Jambi Indonesia Chemistry Education Study Program Faculty of Teacher Training and Education Universitas Jambi Indonesia Center of Energy and Nanomaterial Study Universitas Jambi Indonesia Agricultural Product Technology Study Program Faculty of Agricultural Technology Universitas Jambi Indonesia Physical Education Faculty of Teacher Training and Education Universitas Mataram Indonesia

One of the solutions for fossil fuel crisis is to find alternative energy based on renewable materials. In this research, catalytic cracking of used cooking oil has been investigated to produce biofuel using Cr-charcoal catalyst. The charcoal was produced from solid waste (shell) of palm oil industry. Chromium solutions with various concentrations (1%, 2%, and 3%) were impregnated into charcoal to produce Cr-charcoal catalyst. The catalysts were used for catalytic cracking of used cooking oil at three levels of temperature: 450°C, 500°C and 550°C. The XRD patterns and SEM images of the catalyst showed that the catalyst was in amorphous form. SEM-EDX analysis showed that the Chromium was impregnated into charcoal successfully with amount of Chromium absorbed into charcoal was 0.51%;1.07% and 14.38% respectively. The SEM images also showed that charcoal as supported catalyst and Cr-charcoal catalyst have unique pores. The highest liquid oil fraction was obtained by catalytic cracking at 500°C using 3% Cr-Charcoal catalyst. The liquid product of this process was mainly diesel oil with 8-24 carbon atoms (86.35%) and the rest was liquid product with 6-7 carbon atoms. © Published under licence by IOP Publishing Ltd.

关键词： Catalysts

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Comparison of Taylor Galerkin and FTCS models for dam-break simulation 5

Comparison of Taylor Galerkin and FTCS models for dam-break ...

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5th International Seminar on Sustainable Urban Development, ISoSUD 2020

作者： Hafiyyan, Q. Adityawan, M.B. Harlan, D. Natakusumah, D.K. Magdalena, I. Graduate School of Civil Engineering Bandung Institute of Technology Jawa Barat Bandung Indonesia Center for Coastal and Marine Development Bandung Institute of Technology Jawa Barat Bandung Indonesia Study Program of Water Resouces Engineering and Management Bandung Institute of Technology Jawa Barat Bandung Indonesia Study Program of Water Resources Engineering Bandung Institute of Technology Jawa Barat Bandung Indonesia Industrial and Financial Mathematics Research Group Bandung Institute of Technology Jawa Barat Bandung Indonesia

The aim of this paper is to compare the ability of two numerical models to simulate two-dimensional dam-break flows. Dam-break modelling is important in reducing the high-risk of dam failure by determining the water flow movement and its effect on buildings downstream. In this study, the Taylor Galerkin and Forward Time Central Space method is presented to simulate 2-D dam-break flow. The Hansen filter is applied to both methods to reduce numerical instability oscillations in the model. The filters were used for each time step at each computing point. The model is verified by comparing the result simulation with numerical results from previous studies. The result show that Taylor Galerkin numerical scheme with Hansen filter is successful to simulate the problem of 2-D dam-break. Also, the Taylor Galerkin model has better results than the FTCS model. Studies like this are needed for mitigation efforts in the event of dam failure. © Published under licence by IOP Publishing Ltd.

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