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Disaster risk reduction of mount agung cold lava flood at the Bali cultural centre in Klungkung Regency

IOP Conference Series: Earth and Environmental Science 2022年第1期989卷

作者： I.N. Sutarja M.D.W. Ardana S.P. Gustave Civil Engineering Study Program Faculty of Engineering Udayana University Bali Indonesia Centre for Disaster Studies Udayana University. Disaster Risk Reduction University Forum

The Bali Province Government plans the development of Bali Cultural Centre as a comprehensive cultural information centre to support the development of Culture-oriented Bali Tourism. The Bali Cultural Centre site is situated in an area of post-mining remnants in Klungkung Regency. The sites located at coordinates 8°32'41.35' - 8°34'30.94' South Latitude and 115°24'54.92' - 115°26'6.99' East Longitude. This site is also portion of estuary area of the Unda River which has a high potential for the danger of cold lava flood from the Mount Agung eruption. The structure to manage cold lava floods at the Unda River estuary is being conducted. The construction is divided into two locations which design to satisfactory a 50-year design flood with discharge of 1436.11 m3 per second. The first location is at upstream (north side of Prof. Ida Bagus Mantra Street) using a single rectangular cross section. The second location is at downstream (south area of Prof. Ida Bagus Mantra Street) using a combine double rectangular cross section. These two types of cross sections are designed to accommodate the capacity of water discharge under normal conditions and still able to drain water discharge in the 50-year return period. The presence of this channel allows the cold lava flood flow directly towards the sea-shore and so as to reduce the risk. It is possible that the sediments settle at the base of the channel, therefore, channel shape normalization and periodic dredging for maintenance are essential.

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A study on Durability for Rigid Pavement Against Acid Environment and Displacement Model

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IOP Conference Series: Materials Science and engineering 2021年第1期1144卷

作者： Wahyu Widodo Civil Engineering Study Program Faculty of Engineering Universitas Muhammadiyah Yogyakarta Indonesia.

An acidic environment commonly found in peat soils or expansive soil will harm the quality of rigid pavement by considering its use at long-life plan, traffic load, and minimization of damage to the crossroad due to vehicle braking. As a concrete provider, chemical admixture as mixed materials today is widely used with the reasons of workability, initial strength, as well as saving of material used. This research aimed to find out the durability of concrete admixture using sika-NN and plastocrete (retarding and water reducing admixture) at the acid environment and knowing the displacement that occurred using ABAQUS software modeling. It used the laboratory experimental method and the cube concrete sample 15×15×15 cm with the compressive strength of 33.2 MPa. A total of 18 concrete samples were immersed using normal pH water and H2SO4 at pH 1 ± 1 tested at 3, 7, 14, 28, 60, and 90 days using the Duplo method. In this research, the concrete durability was carried out using, Ultrasonic Pulse Velocity Test (UPVT) to test the density, compressive test, and modeling concrete displacement on peat soils with vehicle loads in acidic environments using software ABAQUS. The mixed design results show an average setting time value of about 112 minutes. Coarse aggregate and cement decrease due to additives is approximately 24% and 18% respectively, increasing the use of fine aggregate to 16.49%, but the value of concrete density increases base on soaking time. Besides that, there is a decrease in compressive strength up to 16% at the age of 90 days. The value of displacement in the modelled pavement uses a maximum load of 8 tons each 2.994 mm for concrete with normal water and 3.045 mm for concrete with an acid environment respectively. Concrete soaked in acid water is the greatest deformation that occurred in rigid pavement using ABAQUS and indicates that acid water has an impact on decreasing concrete quality.

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Analyzing the use of SEO and Google Analytic on the Website of Vocational High School of Information Technology Annajiyah

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Journal of Physics: Conference Series 2021年第1期1737卷

作者： L D Supraba H Jati Electrical and Informatics Engineering Education Study Program Faculty of Engineering Yogyakarta State University

The number of Islamic boarding school teaching both Information Technology (IT) Education and Religious Education is still limited. Vocational High School of Information Technology Annajiyah located in Tambakberas, Jombang, East Java is a school having both subjects taught. The existence of Vocational High School of Information Technology Annajiyah has not been widely known by outside and inside society of Jombang Regency. Therefore, Therefore, analysis of the use of SEO is necessary to determine the potential of website visit and school promotion. Previously, Vocational High School of Information Technology Annajiyah promoted school by using brochures only. This method was considered able to introduce the school through traditional way. Analysis result of improving SEO can be seen in Google Analytic recorded a number of site visits amounted 403 in June, where 82.2% of active users are dominated by mobile phone users and fluctuation of the number of visits. This increase is affected by both the implementation of SEO and online PPDB process during the COVID pandemic.

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Monitoring Urban Expansion and Loss of Agriculture on the North Coast of West Java Province, Indonesia, Using Google Earth Engine and Intensity Analysis

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Scientific World Journal 2022年第1期2022卷 3123788页

作者： Gandharum, Laju Hartono, Djoko Mulyo Karsidi, Asep Ahmad, Mubariq School of Environmental Science Universitas Indonesia (UI) Jl. Salemba Raya No. 4 Jakarta 10430 Indonesia Center of Regional Resources Development Technology (PTPSW) National Research and Innovation Agency (BRIN) Gedung Geostech 820 Banten 15314 Indonesia Environmental Engineering Study Program Faculty of Engineering Universitas Indonesia (UI) Depok 16424 Indonesia Department of Geography Faculty Mathematics and Natural Sciences Universitas Indonesia (UI) Depok 16424 Indonesia

Uncontrolled urban expansion resulting from urbanization has a disastrous impact on agricultural land. This situation is being experienced by the densely populated and fertile island Java in Indonesia. Remote sensing technologies have developed rapidly in recent years, including the creation of Google Earth Engine (GEE). Intensity analysis (IA) is increasingly being used to systematically and substantially analyze land-use/land-cover (LULC) change. As yet, however, no study of land conversion from agriculture to urban areas in Indonesia has adopted GEE and IA approaches simultaneously. Therefore, this study aims to monitor urban penetration to agricultural land in the north coastal region of West Java Province by applying both methods to two time intervals: 2003-2013 and 2013-2020. Landsat data and a robust random forest (RF) classifier available in GEE were chosen for producing LULC maps. Monitoring LULC change using GEE and IA has demonstrated reliable findings. The overall accuracy of Landsat image classification results for 2003, 2013, and 2020 were 88%, 87%, and 88%, respectively. IA outputs at interval levels for all categories showed that the annual change-of-area rate was higher during 2013-2020 than during 2003-2013. At the category level, IA results showed that the area of agricultural land experienced net losses in both periods, with net loss in 2013-2020 being 2.3 times greater than that in 2003-2013 (∼1,850 ha per year). In contrast, the built-up area made net gains in both periods, reaching almost twice as much in the second period as in the first (∼2,030 ha per year). The transition-level IA performed proved that agricultural land had been the primary target for the expansion of built-up areas. The most extensive spatial distribution of land conversion from agriculture to built-up area was concentrated in the regencies of Bekasi, Karawang, and Cirebon. These findings are intended to provide stakeholders with enrichment in terms of available literature

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Design of 270 CC T2 gas capacity converter 2

Design of 270 CC T2 gas capacity converter

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2018 2nd International Conference on engineering and Applied Technology, ICEAT 2018

作者： Azarul, F. Trisno, M.D. Dahlan, D. Mechanical Engineering Study Program STT Muhamadyah Cileungsi-Bogor Jalan Anggrek No. 25 Perum. PTSC Cileungsi Village Kec. Cileungsi Bogor Cileungsi Bogor West Java16820 Indonesia Mechanical Engineering Study Program Faculty of Industrial Technology - ISTN Jl. Moh. Kahfi II Jagakarsa Jakarta12640 Indonesia Mechanical Engineering Study Program Faculty of Engineering Universita Pancasila Srengseng Sawah Jagakarsa Jakarta12640 Indonesia

Fuel motor is a machine that converts chemical energy into mechanical energy. In the design of this approach, we look for a gas converter model in accordance with its capacity according to the volume of the cylinder used, where the thing that needs to be considered is the performance of the gas converter itself, namely from the art form/model, fuel efficiency and large pressure settings. gas supply that enters the combustion chamber. The GX270 general motor is a fuel motor engine used as a test tool. The design was carried out at the STT Muhamadyah Cielungsi mechanical engineering energy conversion laboratory. To understand the variables that affect performance, in making this converter, things that need to be considered are variations in rotation and variations in load. From the design of the gas converter, the results of the design calculation are as follows: T torque = 19.12 (Nm), effective power Ne = 5.003066667 (kW), average effective pressure Pe = 889.4340741 (kPa), total usage hourly fuel mf = 0.0675 (kG / hour), specific fuel consumption Be = 0.013491725 (kg / kN.m), fuel ratio with air F / A = 0.13781, ideal air mass flow rate mv = 0,0,001138242 (m3 / s), volumetric efficiency 843,30666 (%) and thermal efficiency 15,78 (%), the greater the engine rotation used, the more fuel level will be consumed, as well with effective engine power. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Gases

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Development of Human Machine Interface (HMI) Training Kit as A Learning Media for Industrial Automation engineering Practical Courses

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Journal of Physics: Conference Series 2021年第1期1737卷

作者： T H T Maryadi H S Pramono Y I Hatmojo E Prianto Sunomo Electrical Engineering Education Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

Learning media is one of the learning tools that is needed so that the learning process can run smoothly and students can have competencies in accordance with the expected competency goals. This paper discusses: (1) developing a Human Machine Interface (HMI) training kit as a learning medium in the Industrial Automation engineering Practical Course; (2) the performance of the HMI training kit; (3) the feasibility of the HMI training kit based on the assessment of media experts, material experts and student responses as training kit users. In developing this training kit using the ADDIE model which consists of Analysis, Design, Development, Implementation and Evaluation. Data collection was carried out by testing the performance of the media, and giving a questionnaire to media experts to assess the feasibility of the media aspect, a material expert questionnaire to assess the appropriateness of the material and a questionnaire to determine student responses as users. The data were analyzed by means of quantitative descriptive analysis which were then categorized. The result of this development is HMI practice learning media for industrial automation engineering practice courses which consist of HMI practice hardware, and jobsheets. The performance of the HMI training kit for input and output parameters, visualization of engine control in the form of buttons, sliders, output visualization, indicator lights, and overall graphics have a 100% correct performance. Based on media experts, design aspects, technical aspects and usefulness aspects were rated very well, so that overall the media aspect received an assessment in the very proper category Based on material experts, technical aspects and aspects of usefullness received an assessment in the very good category, so that overall the material aspect received an assessment in the very proper category. Based on assesment of students as users, the average score student response falls into the very good category.

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Evaluation of the lighting system in drawing studio at the E12 building, faculty of engineering UNNES

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IOP Conference Series: Earth and Environmental Science 2021年第1期700卷

作者： M F Setiawan Architectural Engineering Study Program Faculty of Engineering Semarang State University (UNNES) Indonesia

A room can be said to be a good one if the lighting following the requirements of needs depends on the function of the room. The room studied in this study was a drawing studio room in E12 Building, faculty of engineering UNNES. This room has a condition where the spread of light entering from the window is uneven so during the day the lights must always be turned on. The purpose of this study is to measure and evaluate the lighting intensity of the drawing studio space. This research was conducted using descriptive and evaluative methods. The data obtained is sourced from the results of direct light intensity measurements on the object of research conducted in the morning, afternoon, and evening for three days using a lux meter and measurements made referring to SNI 16-7062-2004 about measuring the intensity of lighting at work. The results of the measurement of lighting intensity in the image studio room will be compared with the SNI recommended standards. According to SNI 03-6575-2001, the standard requirement for a lux studio drawing space is 750 lux. The result, both when the lamp is turned on and the lamp turns off the measurement results do not meet the standards. It is recommended to increase the intensity of artificial lighting (lights) in the drawing studio until it meets the SNI 750 lux standard. From the results of calculations with the lumen method, it is recommended to replace each lamp with a lamp that has a light current of 9360 lumens.

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Development Mobile Application Android Based for Sensor and Transducer

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Journal of Physics: Conference Series 2021年第1期2111卷

作者： Y I Hatmojo S M Azis Electrical Engineering Education Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

The aims of this research are: (1) producing a mobile applications android based for sensor and transducer field of study on vocational education; (2) know the quality of the product mobile applications android based for sensor and transducer field study on vocational education. The method used is the Software Development Life Cycle with the Waterfall model. The stages in Waterfall model are: (1) requirements definition; (2) system and software design; (3) implementation and unit testing; (4) integration and system testing; (5) operation and maintenance. The black box test results show the performance of Sensor application software can all function properly. While the results of the compatibility test show the application can run on various android systems (at least Android 4.2).

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Preliminary Gravity study of Pre-Tertiary and Tertiary Rock in Northern Kebumen, Central Java, Indonesia 2

Preliminary Gravity Study of Pre-Tertiary and Tertiary Rock ...

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2nd Southeast Asian Conference on Geophysics, SEACG 2018

作者： Nizar Ahmady, Faridz Santoso, Djoko Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung40132 Indonesia Applied Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung40132 Indonesia

Luk Ulo Melange Complex is a Pre-Tertiary rock formation consisting of various lithological background and complicated geological structure. Located in Northern Kebumen Regency, this rock is originally interpreted as products of tectonic process caused by paleo-subduction between Indian Oceanic Plate beneath Eurasian Plate in Cretaceous age. According to previous study on geological surface investigation shows that the melange complex is tectonically overlain by Tertiary sedimentary formation. On the contrary, geophysical study of the subsurface condition of the area is still under discussion due to limited of measured data. In order to obtain detailed subsurface image, gravity profiling was measured and interpreted across both Tertiary and pre-Tertiary rock. Frequency domain filter and designed moving average filter were used to separate residual and regional anomaly. The results denote gravity value of residual anomaly varying from -5 to +5 mGal, while regional anomaly is ranging from 150-180 mGal respectively. The preliminary interpretation was developed by taking into account the geological information and also the data that was collected during field campaign. Overall, high gravity anomaly is interpreted as diabase intrusion in the middle of research area. Meanwhile, low gravity anomaly indicated clay rich rock material related to matrix content of Luk-Ulo Melange Complex in the northern area. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Frequency domain analysis

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Stress analysis on the frame of peanut skin peeler using autodesk inventor software 1

Stress analysis on the frame of peanut skin peeler using aut...

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

作者： Cipto Rahangmetan, K.A. Sariman, F. Hariyanto Bahar, S.B. Sapsal, M.T. Departemen of Mechanical Engineering Faculty of Engineering Universitas Musamus Merauke Indonesia Civil Engineering Study Program Universitas Muhammadiyah Buton Indonesia Department of Agricultural Technology Hasanuddin University Makassar Indonesia

The framework of the peanut shelling machine functions as a supporting structure for the components of the peanut shelling machine, namely the top funnel, funnel retaining frame, the lid on the peeler shaft, pulley, sieve shaft, sieve, engine body. Frame material is mild steel equal leg angles size 45 x 45 x 5, yield strength is 3,002E + 04 psi and tensile strength is 5.004E + 04 psi. Skeletal strength analysis was carried out using the autodesk inventor professional 2015 software. The engine frame was given axial loading of 500 N, 600 N, 700 N, 800 N, 900 N, and 1000 N. The analysis results of the maximum stress occur at 1000 N loading, amount to 16.85 Mpy, and the maximum deformation occurs at 1000 N loading, amounting to 0.07727 mm. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Sieves

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