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Design mixed formula of hot mix asphalt mixture very thin overlay using crumb rubber

IOP Conference Series: Materials Science and engineering 2020年第1期821卷

作者： S Sunarjono P A Wijaya N Hidayati A Magfirona Civil Engineering Postgraduate Study Program Universitas Muhammadiyah Surakarta Surakarta Indonesia Transportation Research Center Faculty of Engineering Universitas Muhammadiyah Surakarta Indonesia

One of the technologies expected to improve the quality of flexible pavement is to use a modified asphalt mixture of Crumb Rubber (CR). The material can be used as a very thin added layer which is then called Very Thin Overlay Modified Crumb Rubber (VTO Mod-CR) and the functions as a leveling layer. This asphalt mixture is expected to have high durability and increase the age service life of flexible pavement. The aim of this study was to analyze the design mix formula (DMF) and the durability of the asphalt mixture. This research carried out variations of asphalt content i.e. 6.0%, 6.5%, 7.0%, 7.5% and 8.0% with each variation of 3 specimens for Marshall Test. Based on the DMF analysis results obtained optimum asphalt content of 7.00%, while the properties of the mixture in the form of bulk density of 2.240, VIM of 3.77%, VMA of 18.15%, VFA of 79.23%, Stability of 1049 kg, Flow of 3.47 mm, Marshall Quotient of 251 kg / mm, Bitumen Film Thickness 16.08 µm. The results of the analysis of the mixture properties have met specifications General of Highways, so it can be used as a reference for AMP. The BFT value obtained meets the minimum specification specifications of 16 µm, this shows that the resistance to water and oxidation is higher, so the pavement becomes durable.

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An assessment of high carbon stock and high conservation value approaches in mining area

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IOP Conference Series: Earth and Environmental Science 2021年第2期807卷

作者： S H Larekeng M Nursaputra Nasri A S Hamzah A S Mustari A R Arif A P Ambodo Y Lawang A Ardiansyah Laboratory of Biotechnology Forestry Engineering Study Program Faculty of Forestry Universitas Hasanuddin Makassar 90245 Indonesia Laboratory of Forestry Planning and Information System Forestry Science Study Program Faculty of Forestry Universitas Hasanuddin Makassar 90245 Indonesia Laboratory of Conservation of Forest Resources and Ecotourism Forestry Science Study Program Faculty of Forestry Universitas Hasanuddin Makassar 90245 Indonesia Faculty of Engineering Universitas Hasanuddin Gowa 91711 Indonesia Faculty of Mathematics and Natural Sciences Universitas Hasanuddin Makassar 90245 Indonesia Vale Indonesia Sorowako East Luwu 92983 Indonesia

The impact of forest degradation due to open-pit mining activities causes sustainable ecological damage. Mining activities that are not organized due to the mineral exploration process have resulted in many forest areas experiencing degradation. This degradation certainly reduces the level of carbon sequestration in the area, impacting the sustainability of environmental functions around the mining area. The high carbon stock (HCS) approach is a way to help companies implement their 'no deforestation' commitments. The high carbon stock approach will identify forests that must be protected and land that can be developed. Forests with high carbon stocks are maintained because they function as carbon stores, habitats for biodiversity, and provide the necessities of life for local communities. Therefore, this study aims to obtain data on the potential for carbon stocks and create a spatial model for distributing carbon content in the concession area of PT. Vale Indonesia can later be determined as high conservation value (HCV) areas using the high carbon stock approach. Measurement of carbon content in the study used an allometric equation that has been developed, then the distribution of carbon was made using the spatial vegetation index model obtained from Sentinel 2 imagery. The results showed an area of 30,526.49 (42.97%), which had high carbon stock with an average carbon stock of 106.09 ton/ha, which needed to be maintained as an area of high conservation value in the mining area of PT. Vale Indonesia.

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Application of Online Science Practicum by Using Microsoft Teams and Learning Management System (LMS) During the Covid 19 Pandemic

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Journal of Physics: Conference Series 2021年第1期2019卷

作者： W A Pertiwi L A Sanjaya Nadiyah Hasirah M Haramen A S Budi E Zarvianti R W D Puspa L K Sianipar W Qoiriyah H Sitompul Islamic Education Management Study Program Faculty Islamic of Education and Teacher Training Muhammad Azim Institute Jambi Indonesia Department of Physics Faculty of Mathematics and Natural Science Universitas Negeri Jakarta Indonesia. Sharia Economics Study Program Faculty of Sharia and Law Muhammad Azim Islamic Institute Jambi Indonesia Physics Education Study Program STKIP Muhammadiyah Sungai Penuh Indonesia Kartika VIII-1 Senior High School Jakarta Indonesia Department of Physics Education Universitas Pelita Harapan Tangerang 15811 Indonesia Informatics Engineering study program Faculty of Engineering Sheikh Yusuf Islamic University Tangerang Indonesia

The research objective of this is to see how to apply science practicum online using Microsoft Teams and Learning Management System (LMS). The form of this research is classroom action research which aims to apply the online science practicum during the Covid 19 pandemic. Therefore, it is carried out using two cycles in the application of online science practicum. The subjects of this study were students of the seventh semester in the Natural Science practicum course. Through observation and evaluation, it is shown that in the cycle I the percentage of practicum implementation which includes aspects of preparation, process and data and practicum results is 87.5%, in cycle II it has increased to 92.5%. In the assessment aspect of the practicum report, the average practicum assessment obtained in the first cycle was 3.09 from the highest score of 4 and in the second cycle was 3.7, while the aspect of student knowledge about the use of the Microsoft team which was taken using google form was 93%. In the aspect of student knowledge about the use of Learning Management System (LMS) by 75% and aspects of student understanding in the implementation of online science practicum using Microsoft Teams by 75%.

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The influence of earthquake force directions on building construction in Lombok Island: a case study of Pandanduri dam in East Lombok

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IOP Conference Series: Earth and Environmental Science 2020年第1期413卷

作者： F Afrizal D S Agustawijaya A Lestari Post-Graduate Study Program in Civil Engineering University of Mataram Indonesia.

Lombok Island is one of the regions in Indonesia that has a relatively high risk of earthquakes due to being flanked by two earthquake sources, namely from the south in the form of Indo-Australian plate thrusting (subduction mega-thrust) and north there is a north arc pressure (Flores thrust). Pandanduri Dam is located in the direction of the earthquake force N 171° E. This study aims to determine changes in dam planning using earthquake force calculations from SNI 1726-2002 to SNI 1726-2012 and the effect of the direction of earthquake strength on dam stability. The analysis results show that earthquake risk in Lombok Island is 0.34 g and 0.42 g for the possibility of exceeding 10% and 2% in 50 years. SNI changes in earthquake force calculations have decreased by 26% for 500 years and an increase of 10% for 2500 years. The percentage of the earthquake force directions is not known to be greater than the percentage the earthquake force directions known that N 171°E is influenced by the angle produced by the earthquake direction N 171° E which is 0.094° for the main force direction of the dam and 89,906° for the direction perpendicular to the dam.

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Analysis of chemical compound in essential oil from clove stem using the FTIR and GCMS methods

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AIP Conference Proceedings 2023年第1期2738卷

作者： Hermin Pancasakti Kusumaningrum Galih Wiji Agung Fakhri Santo Khoirudin Lailatul Khoiriyah Ardian Fikri Amrullah Farah Hanifah Handika Arya Listyanto Muhammad Zainuri I. Nyoman Widiasa Indra Gunawan Biotechnology Study Program Biology Department Faculty of Science and Mathematics Diponegoro University Jl. Prof. Soedharto SH. Tembalang Semarang 50275 Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Jl. Prof. Soedharto SH. Tembalang Semarang 50275 Indonesia Chemistry Department Faculty of Science and Mathematics Diponegoro University Jl. Prof. Soedharto SH. Tembalang Semarang 50275 Indonesia Marine Laboratory Faculty of Fisheries and Marine Sciences Diponegoro University Jl. Prof. Soedharto SH. Tembalang Semarang 50275 Indonesia

Clove (Syzigium aromaticum) is an essential oil-producing plant which is widely found in Indonesia. Essential oil was made from it flower buds, leaves and stems for toothpaste, soaps, cosmetics, perfumes and cigarettes industries. Clove oil has been used in medicinal purposes for relieving pain, treating infection, easing digestive upset, dental and topical application. The objectives of the GC-MS analysis is to measure the type and content of compounds present in the clove stem sample, while the FT-IR analysis is to obtain the infrared spectrum on the clove stem sample through emission or absorption of solids, liquids. and gases in the sample. The chemical functional groups that were read through FT-IR on stem clove oil indicated that it contained aromatic compounds in the form of eugenol and eugenol acetate. The eugenol compound was the main component of the clove stem. The results of GC-MS analysis showed the chemical composition of clove oil consists of 28 compounds with the dominant components of clove oil are eugenol and caryophyllene (93% and 4.80%).

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Changes in the implementation of concrete in situ work method to a precast method

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IOP Conference Series: Earth and Environmental Science 2021年第1期794卷

作者： JB Wowok Birowo Made Suangga Harimawan Professional Engineer Program Department Faculty of Engineering Bina Nusantara University Jakarta Indonesia 11480 Department of Civil Engineering Faculty of Engineering Bina Nusantara University Jakarta Indonesia 11480 PT. Adhi Karya (Persero) Tbk. Jakarta Indonesia 12510

Sulfur Jetty Development Project and TUKS Oil and Gas Dredging Project The Balikpapan RDMP RU V Project is located in Balikpapan City, East Kalimantan. In this project there are 2 (two) main work scopes, namely sulfur jetty work and dredging work. Like other projects, an engineering review of the design drawings, work volumes, work methods, and work schedules is also carried out. The purpose of this engineering review is to evaluate whether the change in the method of implementation of concrete works in Situ to Precast can maximize the work in accordance with the concepts of quality, time and cost. For this reason the submission of the amendment to PERTAMINAwas accompanied by several technical reasons that affected the work. For the method change, a number of processes were carried out such as the submission of design changes, changes in work methods, the process of calculating the structure and several other matters related to the quality of the structure due to changes in the method of implementation. From the results of the calculation of the structure has adjusted to the needs in accordance with the initial plan, by changing the installation method but still maintaining the strength of the structure in accordance with the initial plan. With this Precast method, the construction process is relatively safer and measurable in terms of cost and time.

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The study of Coastline Changing and Total Suspended Solid Distribution Based on The Remote Sensing Data in Teluk Lamong Multipurpose Port Terminal

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IOP Conference Series: Earth and Environmental Science 2021年第1期698卷

作者： Widi Agoes Pratikto Ahmad Fitriadhy Muhammad Ilham Maulana Abiyani Choirul Huda Destyariani Liana Putri Liany Ayu Simatupang Nazariano Rahman Wahyudi Rendatiyarso Laksono Anggie Vibriyanti Rossari Dewi Ocean Engineering Departement Faculty of Marine Technology Institut Teknologi Sepuluh Nopember Surabaya 60111 Indonesia Department of Maritime Technology Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Malaysia Ocean Engineering Study Program Institut Teknologi Kalimantan Kalimantan Timur 76127 Indonesia

Looking forward to the abovementioned conditions, this research is needed to elaborate on the effects of the reclamation to the marine resources in Teluk Lamong Multipurpose Port Terminal as the reclaimed product. In order to describe the impact of the port development, this study will analyze the shoreline changing, the current pattern modeling, as well as the Total Suspended Solid (TSS) modeling using the remote sensing data. The several numbers of expected objectives through this study are to get the set of scientific information on the shoreline changing in Teluk Lamong Multipurpose Port Terminal in the year of 2012 and 2020, to get the figure of current pattern in Teluk Lamong Multipurpose Port Terminal in the year of 2012 and 2020, and to elaborate TSS concentration through the modeling approach in Teluk Lamong Multipurpose Port Terminal in the year of 2012 and 2020. Hence, there is a set of methodologies and tools to cooperate with the information before and after the reclamation. The use of the Digital Shoreline Analysis System (DSAS) software to analyze coastline conditions. The using of Mike 21 to analyze the current pattern and TSS concentrations. In addition to the TSS analysis, it will also need a set of remote sensing data from the Google Earth Engine (GEE). The modeling and calculation give information about the End Point Rate (EPR) values and TSS values. The EPR values are 107.5 m/year, 59,625 m/year and 10,375 m / year. The TSS values are 0-20 mg/L, 20.1-40 mg/L, 40.1-80 mg/L, 80.1-120 mg/L and >120.1 mg/L. Moreover, the result shows the different values among the length of coastline, the current pattern, and TTS in the years 2012 and 2020. The difference in the coastline reaches 950 m at this latest 8 years. While it also brings the changing to the current pattern and sediment transport which show through its current velocity and sediment content per liter of seawater during high and low tide accordingly.

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Development of microcontroller trainer kit as a teaching aid for electronics course

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AIP Conference Proceedings 2024年第1期3115卷

作者： Adhan Efendi Armansyah Maria Mahardini Sakanti Ary Surjanto C. Bambang Dwi Kuncoro Graduate Institute of Precision Manufacturing National Chin-Yi University of Technology No. 57 Section 2 Zhongshan Rd Taiping District Taichung City Taiwan Mechanical Engineering Study Program Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Jalan RS. Fatmawati Raya Pondok Labu Cilandak South Jakarta City Jakarta 12450 Indonesia Department of Refrigeration and Air Conditioning Engineering Politeknik Negeri Bandung Polban Jl. Gegerkalong Hilir Ciwaruga Kec. Parongpong Kabupaten Bandung Barat Jawa Barat 4001 Indonesia Department of Refrigeration Air Conditioning and Energy Engineering National Chin-Yi University of Technology No. 57 Section 2 Zhongshan Rd Taiping District Taichung City Taiwan

This research aims to develop educational and learning support facilities by developing teaching aids for instructors and practical training to enhance the capabilities of laboratories. The developed exercise materials will be used in the electronics laboratory activities to equip vocational students (Diploma 3 and Diploma 4) with practical skills and knowledge of applied electronics. Microcontroller-based teaching materials designed systematically and interactively developed to support the applied electronic system. As a result, the students learn quickly while installing and programming applied electronic hardware applications. There are exercise manuals for up to seven exercise competencies of electronics laboratory activities. Based on the evaluation results from the expert group member and the laboratory chairman, the developed teaching aids are convenient for electronics laboratory classes. Based on student responses using the developed teaching aids, 43% of students mentioned that the microcontroller teaching laboratory kit and hands-on instructions were interactive, easy to use, understandable, and practical, along with the required electronic instructions. They indicated that the material was presented continuously. Meanwhile, 64% of students report that the microcontroller teaching laboratory kit and hands-on instructions motivate, contribute to comprehension, provide convenience, and increase student attention in electronics laboratory activities.

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Analysis of number of fruit loss in the fruit distribution process: Case study of banana fruit

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AIP Conference Proceedings 2020年第1期2227卷

作者： Muhammad Noval Irsyadillah Cindy Rianti Priadi Benny Tjahjono Maulida Fitri Brilyana Bela Islami 1Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Indonesia 2Faculty Research Centre for Business in Society Coventry University United Kingdom

Banana fruit has the highest production rate in Indonesia with a total production of 7.01 million tons/year. However, the amount of fruit waste from the supply chain that supports the production is still uncertain. This study is aimed to analyze the production of fruit waste from the distribution process and to provide some suggestions in optimizing the its process. Data were obtained through direct sampling on three stages i.e. farmers, wholesalers, and retailers. The parameters analyzed temperature, humidity, and waste generation. The results showed that farmers did not produce waste because all the postharvest fruits were sold to the wholesalers. The wholesalers generated average waste 1.98% per total inventory. The retailers produced 2 types of waste from transportation with the average waste generation of 0.67% per total inventory, and daily waste with the average generation of 2.53% per total inventory. Based on this study, improvement in handling systems at distribution process are needed to prevent waste generation. The implementation of countermeasures is also needed by applying the circular economy to improve the efficiency, minimize the waste generation, and improve the profits. The potential actions than can be implemented are utilizing the waste for animal feed and composting.

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Correction: Characterizing country-specific human and ecosystem health impact and damage cost of agricultural pesticides: the case for Thailand

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The International Journal of Life Cycle Assessment 2022年第12期27卷 1377-1377页

作者： Mankong, Phatchari Fantke, Peter Phenrat, Tanapon Mungkalasiri, Jitti Gheewala, Shabbir H. Prapaspongsa, Trakarn Graduate Program in Environmental and Water Resources Engineering Department of Civil and Environmental Engineering Faculty of Engineering Mahidol University Nakhon Pathom Thailand Quantitative Sustainability Assessment Department of Environmental and Resource Engineering Technical University of Denmark Kongens Lyngby Denmark Department of Civil Engineering Faculty of Engineering Naresuan University Phitsanulok Thailand Technology and Informatics Institute for Sustainability (TIIS) National Metal and Materials Technology Center (MTEC) National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand The Joint Graduate School of Energy and Environment (JGSEE) King Mongkut’s University of Technology Thonburi Bangkok Thailand Centre of Excellence On Energy Technology and Environment Ministry of Higher Education Science Research and Innovation Bangkok Thailand

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