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2nd International Conference on Computer, Science, engineering, and Technology, ICComSET 2019

作者： Ridha, Moch. Rasyid Pramiarsih, Euis Eka Widjajani Mathematic Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Economic Education Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Industrial Engineering Study Program Faculty of Engineering Universitas Langlangbuana Bandung Indonesia

This article reports the findings of one pretest-posttest design experiment with the control group and with GeoGebra software learning application to examine the mathematical understanding abilities and responses of students taking Geometry Transformation course. The subjects of this study were 24 students of mathematics education study program in Universitas Langlangbuana. The research instrument consisted of a mathematical comprehension ability test and a student response questionnaire. Based on data analysis using SPSS 2.0.0 and Microsoft Excel 2013, the study found that achievement and improvement in mathematical understanding skills and responses of students who received learning with GeoGebra software were better than achievement and improvement in student's ability who obtain conventional approach for the high, middle and low categories. The study also found a moderate relationship between mathematical understanding ability and student response. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Students

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Development of Color Detection Based on Camera Infrared Filter with Python Image Processing

Development of Color Detection Based on Camera Infrared Filt...

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Student Conference on Research and Development (SCOReD)

作者： Joshu Leonardy Nawal Zuhdaniel Aflah Mohd Rashidi Bin Salim Mohd Haniff Bin Ibrahim Hadi Bin Manap Wildan Panji Tresna Faculty of Electrical Engineering Universiti Teknologi Malaysia JohorBahru Malaysia Military Physics Study Program The Republic of Indonesia Defense University Bogor Indonesia Faculty of Electrical & Electronic Engineering Technology University Malaysia Pahang Al Sultan Abdullah Pekan Malaysia Research Center for Photonics National Research and Inovation Agency Indonesia South Tangerang Indonesia

ISBN: (数字)9798331510077

ISBN: (纸本)9798331510084

This research explores the use of a modified infrared (IR) camera equipped with a high-pass filter to distinguish between natural objects (vegetation) and artificial objects (synthetic military uniforms) in an environment where vegetation makes objects difficult to detect. In military operations, especially guerrilla warfare in tropical forests, detecting enemies camouflaged in vegetation makes it difficult to distinguish targeted objects. Visible light cameras usually struggle to distinguish between synthetic and natural colors. This methodology involves the use of Python programming and various libraries, such as Computer Vision (CV), to process images captured by modified cameras. A graphical user interface (GUI) was developed to analyze color values, focusing on the red, green, and blue spectra. The results show that the modified IR camera can more effectively separate synthetic and natural object color peaks compared to a standard visible light camera, offering potential applications in military reconnaissance and sniper operations. This research demonstrates how image processing can improve object detection in complex environments.

关键词： Image color analysis Vegetation mapping Object detection Reconnaissance programming Cameras Standards Research and development Graphical user interfaces Python

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Effective Municipal Wastewater Treatment at Low-Cost Using Coagulation/Precipitation Followed By Nano-Disinfection

Effective Municipal Wastewater Treatment at Low-Cost Using C...

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2021 AIChE Annual Meeting

作者： Mostafa, Mohamed K. Mahmoud, Ahmed S. Kamar, Mohamed T. Elshfai, Maha M. Moussa, M. Peters, Robert W. Cairo Egypt Egypt Environmental Engineering Program Zewail City of Science and Technology Giza Egypt Egypt Environmental Engineering Faculty of Engineering Mataria Helwan University Egypt Department of Civil Construction and Environmental Engineering University of Alabama at Birmingham BirminghamAL United States

ISBN: (纸本)9781713852834

Conventional wastewater treatment plants suffering from several industrial effluents overlap, trihalomethane (byproduct after free chlorine disinfection), and high construction cost. This study successfully prepared and compare a novel mixing of coagulants ferric/ferrous chloride (50:50) with other traditional individual coagulants such as ferric chloride, ferrous chloride, and aluminum chloride for domestic wastewater treatment. The results obtained indicated that the mixture of ferric/ferrous chloride is more efficient than other coagulants to meet the requirements of the Egyptian code for reuse of treated wastewater in different agricultural applications. Also, this study successfully replaced traditional chlorine addition by low-cost green synthesis of nano-Zero Valent Iron (GT-nZVI) for tertiary wastewater treatment. A continuous flow system was successfully built to achieve the treatment requirements in an economical and fast way. Finally, this study strongly supported using the proposed system rather than traditional wastewater treatment technologies in decentralized wastewater treatment units to overcome the combination of industrial effluents to the municipal wastewater networks and to reduce hazardous material produced after using traditional chlorine disinfectant. © 2021 American Institute of Chemical Engineers. All rights reserved.

关键词： Wastewater treatment

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Life cycle assessment analysis of empty fruit bunches utilization: A case study in Riau province

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AIP Conference Proceedings 2024年第1期3215卷

作者： Ayu Wulandari Djoko Mulyo Hartono Astryd Viandila Dahlan Environmental Engineering Study Program Department of Civil Engineering Universitas Indonesia Depok Indonesia

Palm oil consumption has risen due to an increasing preference for vegetable oil. However, this growth in the palm oil industry has given rise to various challenges, especially concerning environmental issues and emissions. This study evaluated the ecological consequences of using empty palm fruit bunches in plantations and furnaces and utilizing solid waste from empty fruit bunches as a renewable energy source. The research findings indicate that, for a 30 tons/hour capacity, the total greenhouse gas emissions (GWP) in the furnace and plantation management amount to 234.72 kg CO2 eq and 234.69 kg CO2 eq, respectively. The acidification impact (0.51 kg SO2 eq) and the eutrophication (0.95 kg PO4 eq) in the plantation and the furnace. For a 60 tons/hour capacity, the total GWP increases to 328.59 kg CO2 eq in the furnace and 328.37 kg CO2 eq in the plantation. Furthermore, acidification (0.73 kg SO2 eq) and eutrophication (1.33 kg PO4 eq) impacts persist in both the plantation and furnace stages. The primary concern highlighted in this research is furnace management, particularly concerning the oil content. Additionally, the production stage emphasizes the importance of raw materials as another critical hotspot. The study recommends implementing technological changes and adopting preventive maintenance practices to minimize the oil content in empty fruit bunches to mitigate the environmental impact during crude palm oil (CPO) production stages; utilizing empty fruit bunches as renewable energy presents an option to reduce greenhouse gas emissions.

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Alginate-based bioink for organoid 3D bioprinting: A review

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Bioprinting 2022年 28卷

作者： Leonardo, Michael Prajatelistia, Ekavianty Judawisastra, Hermawan Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Indonesia Materials Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Indonesia

As a 3D cell culture, organoids have been researched thoroughly to model the human biology system in advancing disease treatment and drug development. A novel way to create an organoid is using bioink, consisting of polymeric materials and living cells, to fabricate a hydrogel scaffold through the 3D bioprinting method. Alginate has the potential to be developed as a bioink due to its good biocompatibility, low toxicity, and ease of processing method. However, studies are still required to obtain an optimum alginate-based bioink. Alginate is insufficient in terms of the cell-binding site;thus, mixing it with supplementary gelatin material can be employed to optimize further the printability, mechanical properties, and biocompatibility of alginate-based bioink. The addition of gelatin material, in addition to increasing the binding site, also makes the process of making bioink easier due to the thermoresponsive nature of gelatin. The alginate-based bioink can be further optimized depending on gelatin concentration to produce appropriate density and rheological value of bioink. The addition of gelatin into alginate-based bioink will also significantly affect the printability of bioink and the mechanical properties of resulted hydrogel scaffold, which need to be considered appropriately. The alginate-based bioink also showed good biocompatibility regarding cell viability and biological performance. This paper focuses on the relationship between the structure and properties of alginate-based bioink, the 3D bioprinting processing parameters, and the implementation of resulted hydrogel scaffold and organoid. © 2022 Elsevier B.V.

关键词： 3D bioprinting Alginate Bioink Gelatin Hydrogel scaffold

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Design of sustainable green supply chain management using house of risk

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AIP Conference Proceedings 2024年第1期2952卷

作者： Lolyka Dewi Indrasari Ana Komari Afiff Yudha Tripariyanto Heribertus Budi Santosa Eko Siswanto Pamadya Vitasmoro Johan Alfian Pradana Venus Khatta Salsabilah Industrial Engineering Study Program Faculty Engineering Universitas Kadiri Kediri Indonesia

The continued role of the green management supply chain has become a parameter of the company’s sustainability. The role that is realized is to provide effectiveness in terms of reducing risks arising from the supply chain. Risks that arise deserve to be identified by the achievement of reducing supply chain risks that occur. The purpose of this study is to model the risks of green supply chain management using the house of risk method. This method as an integration of FMEA-QFD. The product used as a case is snail chips from PT. QRP. Due to the ineffective supply chain, various risks arise where this risk in addition to harming the company also harms the snail material supply vendors. Identification of risks by occurrence and risk agents totaling 22 types. The findings serve as a basis for constructing potential risks modeled with a causal diagram. It was found that the highest case parameter was that there was poor communication with long responses, one of which was. As a result of this case, the prevention action indicator can be clearly known with consideration of 6M (man, machine, material, measurement, method and mother nature). That the preventive action relationship with 6M can create a green supply chain design according to existing conditions. The virtues of the design formed are considering 6M supported by the role of ISO.

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Transforming the power of load balancing: Mitigating transformer losses in electric power distribution systems

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AIP Conference Proceedings 2024年第1期3167卷

作者： Restu Mukti Utomo Muslimin Nur Rani Alham Ade Kurniawan Muhammad Jurdun Nur Afandi Umar Faruq Al-Afifi Faculty of Engineering Electrical Engineering Study Program Universitas Mulawarman Samarinda Indonesia

This article examines the issue of load imbalance in electric power distribution systems, which leads to current flow in the neutral conductor of transformers. The study aims to investigate the impact of load imbalance on neutral current and losses in the transformer. The analysis reveals that a load imbalance of 24% during the day results in a large neutral current of 109 A and increased losses due to neutral current flowing to the ground (8.47%). The findings highlight the significance of load balancing in reducing losses and improving the efficiency of electric power distribution systems. The study provides insights for researchers and practitioners to develop strategies for load balancing to mitigate the effects of load imbalance on transformer losses.

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An analysis of the damage level and reconstruction priority of elementary school buildings in the Central Lombok District

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AIP Conference Proceedings 2023年第1期2706卷

作者： Hariyadi Saifullah Akmaluddin Department of Civil Engineering Faculty of Engineering University of Mataram 83115 Indonesia Master Student of Civil Engineering Study Program Faculty of Engineering University of Mataram 83115 Indonesia

In Central Lombok District, the allocation of funds for the rehabilitation of elementary schools is very small compared to the number of schools that need reconstruction. The percentage of classroom rehabilitation work based on the target schools only reached 9.96%. Consequently, it needs to study to analyze the damage level of buildings and find out the most influenced criteria in formulating decisions for selecting school priorities that must be rehabilitated. Due to controlled aspects and standards are quite a lot and more sophisticated, accordingly the Analytical Hierarchy Process (AHP) method is the proper method for solving these complex problems. The sample in this study was 13 of the 25 schools that received special funds in 2018. The application of the AHP method was preceded by a survey involving experts who were competent in their fields. The results showed that the number of schools with moderate damage was six and severely damaged as many as seven schools. At the same time, based on the order of priority, building repairs are determined by the most influential criteria, namely the level of damage and primary education data.

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Carbonaceous and nitrogenous disinfection by-products potential formation and removal technologies from the water treatment process: A review

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AIP Conference Proceedings 2024年第1期3026卷

作者： Tazkiaturrizki Tazkiaturrizki Sandyanto Adityosulindro Djoko Mulyo Hartono Setyo Sarwanto Moersidik Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Depok Indonesia Environmental Engineering Department Faculty of Architecture Landscape and Environmental Engineering Universitas Trisakti Jakarta Indonesia

Not only at the water treatment process, disinfection is required for the inactivation of pathogen microorganisms in wastewater treatment before it is released to the waterbodies or for recycling purposes. During the disinfection process by chlorination, it found the formation of harmful disinfection by-products (DBPs). DBPs formed because of the reaction of inorganic and organic matter as precursors with chlorine/chloramine. The aim of this research is to analyze the potential formation of Carbonaceous Disinfection By-products (C-DBPs) as the most DBPs in the water and Nitrogenous Disinfection By-products (N-DBPs) as the most DBPs of the wastewater. Most DBPs have precursors from natural organic matter (NOM) and the effluent of sewage treatment contributes to increasing the DBPs precursor. The review method start with identifying DBPs precursor, potential formation of DBPs, factor affecting the formation DBPs, and finding the advanced technologies that are appropriate to remove DBPs and their precursors. It found that trihalomethanes (THMs) is the most widely found in water treatment such as chloroform, bromodichloromethane, and bromoform. N-nitrosodimethylamine (NDMA) is one of N-DBPs that most presence in polluted water and also haloacetonitriles (HANs), haloacetamides (HAcAms), Nitrosoamine (NAs), cyanogen halides (CNX), halonitromethanes (HNMs), N-nitrosomethylethylamine (NMEA). The result shows that disinfection plays a role of formation DBPs in water and wastewater treatment. DBPs have potential health risks for the human body because they are genotoxic and carcinogenic. Physicochemical treatment can remove the precursor of DBPs and advanced treatment enhances the removal of DBPs.

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Development and validation of video-based learning media to increase competency achievement in civil engineering education 6

Development and validation of video-based learning media to ...

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6th International Conference on Technology and Vocational Teachers, ICTVT 2020

作者： Daryono, R.W. Rochmadi, S. Hidayat, N. Graduate Program of Technological and Vocational Education Yogyakarta State University Indonesia Department of Civil and Planning Education Faculty of Engineering Yogyakarta State University Indonesia

The purpose of this research is to develop and know the performance of video animation-based learning videos for measuring pegs from road curves, in the Geomatics Practice subject for civil engineering education students, and to find out the level of feasibility of instructional videos developed in the application of vocational practice learning processes. This type of research is research and development (R&D) that uses the 4D model. Data collection uses interviews aimed at lecturers who teach in vocational practices and questionnaires to assess eligibility in the context of media and materials, which aimed at media experts, material experts, and students who are analysed using quantitative data. The results of the feasibility of developing video animation on material expert perceptions obtained a value of 82.121% which is included in the very feasible category, the perception of media experts obtaining a media value of 93.444% included in the very feasible category, students' perceptions get a value of 88,136 which is included in the very feasible category. © Published under licence by IOP Publishing Ltd.

关键词： Students

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