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Participatory ergonomics in developing e-waste collection network of UNTAR-UPH industrial engineering students

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

作者： H J Kristina A Christiani C O Doaly Industrial Engineering Department Universitas Tarumanegara Jakarta Indonesia Industrial Engineering Study Program Faculty of Science and Technology Universitas Pelita Harapan Lippo Village Tangerang Indonesia

By using the principle of circular economy, the value of products and materials is maintained and utilized as long as possible, so that the landfill can be limited as little as possible. Electronic devices that are no longer used sooner or later will end up at the final processing site such as landfills or incinerators, where they will release toxic material into the air, soil and water, whereas the circular economy concept for e-waste can also be applied. Therefore, this research aims to make a small to medium size e-waste collection pilot project within the scope of UNTAR and UPH industrial engineering students, with participatoryergonomic approach. The research method used is action research anddata collected includes the number of core team students' participation, the amount of participation outside the core team, the form of participation, the network created, the average length of time for e-waste storage before donating, the amount of e-waste per category. In this project there were 102 students involved and divided into 19 groups. Total e-waste collected was 738 pieces.

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Aerobic-pond Palm Oil Mill Effluent (POME) utilization as growth medium of Scenedesmus obliquus for lipid production

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IOP Conference Series: Earth and Environmental Science 2021年第1期737卷

作者： C A Situmeang R Sianturi Y Lestari M M Martgrita Bioprocess Engineering Study Program Faculty of Biotechnology Institut Teknologi Del Laguboti Toba Samosir 22381 North Sumatera Indonesia

The purpose of this research is to know the growth rate and biomass production of Scenedesmus obliquus in palm oil mill effluent (POME) medium taken from aerobic pond and to know the lipid concentration produced by S. obliquus. In this research, S. obliquus was cultured in various POME concentration, those were 20, 60, 80, 90, 95, and 100% v/v, while the concentration of inoculum was 30% v/v, and fatty acid content was analysed by gas chromatography. The results revealed that growth rate was decrease with the increasing concentration of POME (0.3545, 0.1792, 0.1566, 0.1268, 0.1158, and 0.1008/day), dry biomass weight was increase with the increasing concentration of POME (0.40, 1.20, 1.30, 1.77, 2.28, and 2.45 g/L), and lipid content also tended to increase with the increasing concentration of POME (13.10%, 36.59%, 36.65%, 50.37%, 60.40%, and 64.98%). Oleic acid and behenic acid were the dominant fatty acid content in S. obliquus lipid cultured in 100% concentration POME media. It is concluded that aerobic-pond POME can be utilized as growth medium for S. obliquus with a high lipid content.

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Analysis of the use of biogas fuel from palm oil waste as a gas engine (electrical generator)

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AIP Conference Proceedings 2021年第1期2342卷

作者： Rahmad Samosir Budiarto Andreas Kristiawan Mechanical Engineering Study Program Faculty of Engineering Universitas Kristen Indonesia Jakarta Jl.Mayjen Sutoyo no.2 Cawang East Jakarta 13630 Indonesia

An analysis of the use of biogas fuel from palm oil waste has been carried out o produce mechanical energy, including moving generators that produce electricity. In this study two different types of gas are used, namely natural gas and biogas obtained from palm oil waste. This test aims to analyze what the impact of each gas on the performance of the gas engine both in terms of electricity output, fuel consumption and efficiency level. The low calorific value of natural gvvas is 9424 kKal / Nm 3 (39,458 kJ / Nm3 and from the test results the power generated is 10.169 kWh / Nm3 while for biogas the power is 6.062 kWh / Nm3, then the low heating value of biogas is 10.169 kWh / Nm3 while for biogas the power is 6.062 kWh / Nm3, then the low heating value of biogas is obtained. 5615 kJ / Nm3 40.32% lower than the low heating value (LHV) of natural gas. From the results of the analysis it was concluded that the biogas from palm oil waste fulfills the requirements as engine fuel.

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Preparation of Nanocellulose-Alginate Nanocomposites for Chlorhexidine Digluconate Drug Carrier 1

Preparation of Nanocellulose-Alginate Nanocomposites for Chl...

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1st International Conference on Design and Application of engineering Materials 2018, IC-DAEM 2018 in conjunction with 11th Seminar Nasional Metalurgi dan Material, SENAMM 2018

作者： Evelyna, Angela Astifanni, Tiara Khumaira Ruth, Imelda Asri, Lia Purwasasmita, Bambang Sunendar Faculty of Dentistry Maranatha Christian University Indonesia Materials Science and Engineering Bandung Institute of Technology Indonesia Advanced Materials Processing Group Engineering Physics Study Program Bandung Institute of Technology Indonesia Research Center for Nanosciences and Nanotechnology Bandung Institute of Technology Indonesia

Root canal treatment failures generally caused by microorganisms that have ability to invade dentinal tubules. Chlorhexidine is widely known to effectively eradicate broad spectrum bacteria that infected dentinal tubules. The delivery of chlorhexidine to the infected site of root canal still becomes an issue. In order to increase the stability and to regulate the release of chlorhexidine, encapsulation of chlorhexidine digluconate was conducted by employing nanocellulose and alginate nanocomposites. Nanocellulose was prepared from palm kernel cake using acid hydrolysis method. Transmission electron microscopy images showed the formation of whisker and fiber nanocellulose with the average diameter of 20 nm. Resulting nanocellulose was combined with alginate in the presence of Ca2+ crosslinker. Scanning electron microscopy images displayed sphere and oval morphologies of microcapsules with diameter of 500 nm. The microcapsules were further loaded with chlorhexidine digluconate 2% (w/v). In vitro drug release properties were evaluated in PBS at pH 7.4 (normal tooth environment) and at pH 5.5 (infected tooth environment). The UV-VIS results showed that chlorhexidine digluconate has higher release rate at pH 5.5 than at pH 7.4, suggesting that the microcapsule is a good candidate for the delivery of chlorhexidine digluconate to the infected root canal tooth environment. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Alginate

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Patchouli oil analysis of chemical components using FT-IR and GCMS method

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AIP Conference Proceedings 2023年第1期2738卷

作者： Hermin Pancasakti Kusumaningrum Rizqi Sa’adatun Ni’mah Yunita Nurlindasari Annisa Imrani Sadam Arrois Eko Purnomo Fa’ireza Rafli Arfiansyah Erni Setyowati Bambang Dwi Loka 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 Architecture Department Faculty of Engineering Diponegoro University Jl. Prof. Soedharto SH. Tembalang Semarang 50275 Indonesia Food Technology Department Faculty of Animal and Agricultural Sciences Diponegoro University Jl. Prof. Soedharto SH. Tembalang Semarang 50275 Indonesia

Patchouli (Pogostemon cablin Benth.) is a plant that produces essential oils to be used for cosmetics, soap, antiseptic, perfume, pharmaceutical, insecticide and aromatherapy industries. One of the products produced from the patchouli plant is patchouli oil. This study aims to determine the content of chemical compounds contained in the essential oil of patchouli using the GC-MS analysis method to determine the molecular structure of the compound and separate the fractions in patchouli oil. Another method is the FT-IR analysis method to identify the functional groups contained in patchouli oil. The chemical properties of patchouli oil from the Blado area, Batang Indonesia, are traditionally distilled from fresh patchouli leaves and stems. The results of the GCMS analysis showed that there were 10 compounds with 4 peaks of dominant components which were the constituents of patchouli essential oil, namely Patchouli Alcohol (39.46 %), Delta-Guaiene (21.51%), Alpha Guaiene (20.13%), Alpha-patchoulena (9.01%). In the FTIR results carried out in the range of 4000-450 cm-1, various functional groups such as C=C, –CH2, C-H, C=O, O-H, C-O, =C-H, and N-H. This shows that patchouli oil is rich in alcohol, aromatics, and aldehydes.

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Design and Implementation study of 3.12 kWp On – Grid Rooftop Solar PV System

Design and Implementation Study of 3.12 kWp On – Grid Rooft...

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International Conference on Electrical engineering and Informatics, ICEEI

作者： Ariyq Naufal Mizard Dwi Riana Aryani Ariono Verdianto Chairul Hudaya Faculty of Engineering Universitas Indonesia Energy System Engineering Master Study Program Faculty of Engineering Universitas Indonesia Kampus Baru UI Depok Republic of Indonesia

Conversion of fossil fuels as an energy source can be achieved by optimizing the use of renewable energy. One of the most used renewable energy is solar photovoltaics (PV). At present, solar power plant is an electrification support system for certain buildings because the abundant availability of solar radiation. On this research, Power and energy observations are carried out to determine measure the load power trend, the amount of energy flow from PV to the load, as well as import or export power from or to utility grid by direct measurement on Mosque of faculty of engineering, Universitas Indonesia. According to the study, the highest power generated by solar power plant mostly occurs at 12:00 - 13:00 with the highest power generated by PV is 2,344 W and the exported power is 939 W, and 32.19% - 55.67% electricity energy savings consumption from utility grid.

关键词： Power generation Inverters Power measurement Current measurement Power cables Renewable energy sources Energy measurement

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Evaluation of biochar and Bacillus sp. amendments on lead polluted land: Dehydrogenation enzyme and Pb availability studies

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Environmental Challenges 2024年 14卷

作者： Priyadarshini, Rossyda Nurherdiana, Silvana Dwi Solekhah, Bella Agit Hamzah, Amir Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No.1 Gn. Anyar Kec. Gn. Anyar Jawa Timur Surabaya 60294 Indonesia Center Innovation of Appropriate Technology for Lowland and Coastal Food Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No.1 Gn. Anyar Kec. Gn. Anyar Jawa Timur Surabaya 60294 Indonesia Study Program of Chemical Engineering Faculty of Engineering and Science Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No.1 Gn. Anyar Kec. Gn. Anyar Jawa Timur Surabaya 60294 Indonesia Universitas Tribhuwana Tunggadewi Jl. Telaga Warna Tlogomas Kec. Lowokwaru Jawa Timur Kota Malang 65144 Indonesia

The existence of lead (Pb) in soil has a significant ecological impact, resulting in a reduction in soil fertility. The present work effectively remediated soil contaminated with the heavy metal lead (Pb) through the application of biochar and Bacillus sp bacteria. Currently, there is ongoing research on the utilization of biochar amendments and Bacillus sp bacteria. The main objective is to assess the impact of these materials on the absorption of Pb and the activity of dehydrogenation enzymes. The findings indicate that both materials exhibit significant efficacy in absorbing Pb metal in contaminated soil over the incubation period from day 0 to day 42. The absorption capacity steadily increases until the concentration of Pb in the polluted soil reaches 1–2 ppm, using a biochar dosage of 10–30 ***⁻¹. Incorporating Bacillus sp bacteria at a concentration of 25 ***⁻¹ enhances the uptake of Pb metal. In terms of future prospects, the incorporation of biochar and Bacillus Sp has the potential to enhance the absorption of Pb metal, hence improving soil fertility in an environmentally friendly and cost-effective manner. © 2023

关键词： Bacillus sp Biochar Dehydrogenation enzyme Lead contaminant Soil

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Application of Monitoring Database for Accreditation Instrument UKI PAULUS

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IOP Conference Series: Materials Science and engineering 2020年第1期846卷

作者： Lande Sudianto Petrus Simon Study Program of Electrical Engineering Study Program Faculty of Engineering [Universitas Kristen Indonesia Paulus Study Program of Accounting Faculty of Economics and Business [Universitas Kristen Indonesia Paulus

Accreditation is a form of quality and feasibility evaluation of higher education institutions or study programs conducted by independent organizations or bodies outside of tertiary institutions. To achieve the target of accreditation scores, universities and study programs must adjust their internal conditions in accordance with the standards given by the National Accreditation Board for Higher Education (BAN-PT). In accordance with Permenristekdikti No 32/2016, BAN-PT develops accreditation instruments that are relevant to the development of the higher education sector in Indonesia and follows the global developments. study program Accreditation Instrument (IAPS 4.0) BAN-PT uses 9 criteria. The Accreditation Instrument of Monitoring Database of the study program UKI Paulus was built using a PHP interface and MySql database that can integrate the entire contents of the data and other supporting documents so that during the evaluation processes, the information of achievement determined by BAN-PT from each standard is obtained. The system development steps, uses the Waterfall method which starts from the analysis phase, system design, program code writing, system testing and system maintenance. From 30 respondents who joined the test using black box method, the user accessibility level reached 95.52%. It shows that the system run optimally. This system is able to provide easy access and management of study program accreditation documents.

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Increasing accuracy of classification physical activity based on smartphone using ensemble logistic regression with boosting method 3

Increasing accuracy of classification physical activity base...

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3rd International Conference on Science, ICOS 2019

作者： Lawi, A. Aziz, F. Wungo, S.L. Department of Computer Science Universitas Hasanuddin Makassar90245 Indonesia Faculty of Mathematics and Natural Sciences Universitas Pancasakti Makassar90132 Indonesia Program Study Informatics Engineering STMIK Kreatindo Monokwari98300 Indonesia

At present, the smartphone is equipped with several sensors such as Accelerometer, Gravity sensor, and Gyroscope which can be used to recognize human physical activities such as walking upstair and walking downstairs etc. Machine learning is needed to group data and get information. Statistical methods have poor performance in classifying because procedures must be met. To overcome this, an ensemble technique was used. This study proposes the application of the gradientboost ensemble method to classify walking upstair and walking downstairs. The *** system is designed for data retrieval using a smartphone. Then, the dataset will be partitioned into 70% training data and 30% test data. The results show that the performance of the ensemble boosting method produces 81.82% accuracy, 86.11% sensitivity and 77.50% specificity. © Published under licence by IOP Publishing Ltd.

关键词： Smartphones

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Conceptual design and performance evaluation of COVID-19 vessel for public health service in Indonesia’s remote Island

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AIP Conference Proceedings 2023年第1期2674卷

作者： Tuswan Tuswan Saefulloh Misbahudin Adi Widianto Mahendra Guna Satriananta Rayhan Satria Dwinata Abdi Ismail Muhammad Luqman Hakim Good Rindo Aditya Rio Prabowo Teguh Putranto Department of Naval Architecture Institut Teknologi Sepuluh Nopember Surabaya Indonesia Department of Naval Architecture Universitas Diponegoro Semarang Indonesia Ship Machinery Study Programme Faculty of Vocational Studies Indonesia Defense University Belu Indonesia Department of Systems and Naval Mechatronic Engineering. National Cheng Kung University Taiwan Department of Mechanical Engineering Universitas Sebelas Maret Indonesia Department of Civil Engineering and Architecture Tallinn University of Technology Tallinn 19086 Estonia

The development of medical facilities is crucial in Indonesia’s remote island since COVID-19-19 disease collapses the hospital system. This work is intended to develop the COVID-19 vessel as a medical support system with a dynamic positioning system to give medical health care for Indonesia’s remote island. The COVID-19 vessel is named KM. LOTUS is arranged similarly with Type B medical facility standards. Conceptual design and performance calculation comprised weight calculation, medical facility arrangement, resistance and powering test, seakeeping performances are evaluated. The ship is equipped with an ambulance boat to increase mobility capabilities for smaller waters, such as narrow straits and estuaries. It is placed behind the ship, uses an autonomous system to climb up to the top of the deck. The resistance test has a value of 66.6 kN and a power of 383 HP at a ship speed of 12.22 knots. The seakeeping analysis was carried out using the strip theory method by simulating a ship speed of 12.22 knots representing Maluku sea condition. It can be found that different incoming waves will produce different oscillatory movements of heave, pitch, and roll.

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