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2nd International Conference on Biomass Utilization and Sustainable Energy, ICoBiomasSE 2022

作者： Latif, Abdul Karim, Abubakar Sugianto, Sugianto Romano Ikhwali, M. Faisi Rusdi, Muhammad Doctor Candidate of Agriculture Graduate Program Universitas Syiah Kuala Banda Aceh Indonesia Faculty of Agriculture Universitas Syiah Kuala Banda Aceh Indonesia Department of Environmental Engineering Faculty of Science and Technology UIN Ar-Raniry Banda Aceh Aceh Indonesia

ISBN: (纸本)9789819916948

Top commodities are those that can stimulate growth or development in other sectors, both of which supply inputs and use output in the production process. Leading commodities have high rates of economic growth, relatively large distribution rates, high inter-sector linkages, and the ability to create high-added value. The aim of this research is to examine the leading commodities in Nagan Raya District, Aceh, Indonesia, in terms of agropolitan development. The research method is based on (1) descriptive analysis of agricultural commodity potential, (2) Location Quotient (LQ) analysis to determine commodity superiority, (3) Shift Share Analysis (SSA) to determine commodity development priority level, performance sub-district economy and its hierarchical structure based on agricultural commodity resources, and (4) priority analysis for the development of superior commodities. Darul Makmur sub-district has the highest agricultural production with 73,678 tons/year, followed by Beutong (39,514 tons/year), East Seunagan (36,369 tons/year), Tadu Raya (28,488 tons/year), and Seunagan (24,532 tons/year). This output contains oil palm, rubber, rice, corn, soybeans, cassava, long beans, kale, red chili, durian, banana, and papaya. Meanwhile, the results of the priority development of superior commodities analysis show that the districts of Kuala Pesisir, Beutong Ateuh Banggalang, and East Seunagan have the potential to be agropolitan agriculture developments in Nagan Raya. This is supported by positive proportional and regional share growth, as well as land's ability to provide the most superior commodities (15 commodities) compared to other sub-districts. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Agriculture

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Revealing a Country’s Government Discourse Through BERT-based Topic Modeling in the US Presidential Speeches

Revealing a Country’s Government Discourse Through BERT-bas...

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International Conference on Computer, Control, Informatics and Its Applications (IC3INA)

作者： Rafi Mahmud Zain Sajarwo Anggai Tukiyat Ahmad Musyafa A. A. Waskita Graduate Program of Informatics Engineering Universitas Pamulang Pamulang Indonesia Research Center for Data and Information Sciences National Research and Innovation Agency Bandung Indonesia

ISBN: (数字)9798331542313

ISBN: (纸本)9798331542320

This paper analyzes presidential speeches from the United States, delivered by the current president, Joe Biden, from his inauguration until April 3, 2024, using BERT-based topic modeling techniques. Since the role and actions of the United States affect global affairs, inferring latent topics from these speeches are important for making informed decisions and also useful to researchers. We provide experiments combining different embedding methods and clustering algorithms for dimensionality reduction. Our experiment results demonstrated that using DistilBERT embeddings followed by HDBSCAN clustering and UMAP dimensionality reduction consistently produced meaningful and interpretable topics, and this paper introduces the UMASS and NPMI metrics for evaluating topic coherence, with the best values of these metrics among the other schemes investigated. Some of the dominant themes conveyed in the American president’s state of the union speech that were successfully revealed in this study include international cooperation, alongside significant attention to environmental, community, health, and economic issues.

关键词： Measurement Dimensionality reduction Economics Digital control Visualization Government Coherence Medical services Security Informatics

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Assessment and Decision Making for Grid Connection of Photovoltaic Systems in Residential Projects in Iraq

SSRN

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SSRN 2023年

作者： Al-Lami, Ammar Zaidan Khalaf Koo, Yoonmo Technology Management Economics and Policy Program Graduate School of Engineering Practice Seoul National University Seoul Korea Republic of

Urban growth leads to continuous demand for energy hence a negative impact on sustainability. Energy transition plays a role in mitigating the impacts of increasing the share of renewable energy and improving energy systems. As solar energy is growing fast, this study focused on the factors that contribute to its growth in developing countries. Grid connection is a crucial in achieving the maximum benefit from the outputs of photovoltaic systems (PVs) in residential projects. This study attempts to address this gap. Iraq’s government initiatives to expand solar energy and establish new residential cities represent a promising opportunity to achieve stability in energy systems. A hybrid decision-making model, TES-AHP, was developed to select the grid connection type to accommodate the PV energy produced in residential projects depending on technical, economic, and social dimensions. The results indicate that distributed energy systems are the best option, and that social acceptance and experience of the technical staff are the most significant factors in this decision. Taking into consideration that all factors investigated in this study contribute to the success of the reforms in the energy sector, this study recommends that policymakers should initiate the expansion of solar energy installation by exploiting residential projects. © 2023, The Authors. All rights reserved.

关键词： Solar energy

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Microplastics in wastewater and sludge from centralized and decentralized wastewater treatment plants: Effects of treatment systems and microplastic characteristics

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Chemosphere 2024年 361卷 142536页

作者： Maw, Me Me Boontanon, Narin Aung, Humm Kham Zan Zan Jindal, Ranjna Fujii, Shigeo Visvanathan, Chettiyappan Boontanon, Suwanna Kitpati Graduate Program in Environmental and Water Resources Engineering Department of Civil and Environmental Engineering Faculty of Engineering Mahidol University Nakhon Pathom73710 Thailand Research Center and Technology Development for Environmental Innovation Faculty of Environment and Resource Studies Mahidol University Nakhon Pathom73710 Thailand Graduate School of Global Environmental Studies Kyoto University Kyoto606-8501 Japan

Domestic wastewater treatment plants (WWTPs) play a vital role in limiting the release of microplastics (MP) into the environment. This study examined MP removal efficiency from five centralized and four decentralized domestic WWTPs in Bangkok, Thailand. MP concentrations in wastewater and sludge were comparable between centralized and decentralized WWTPs, despite these decentralized WWTPs serving smaller populations and having limited treatment capacity. The elimination of MPs ranged from 50 to 96.8% in centralized WWTPs and 14.2–53.6% in decentralized WWTPs. It is noted that the retained MPs concentrations in sludge ranged from 20,000 to 228,100 MP/kg dry weight. The prevalence of synthetic fibers and fragments could be attributed to their pathways from laundry or car tires, and the accidental release of a variety of plastic wastes ended up in investigated domestic WWTPs. Removal of MPs between the centralized and decentralized WWTPs was influenced by several impact factors including initial MP concentrations, longer retention times, MP fragmentation, and variations of MP concentrations in sludge leading to different activated sludge process configurations. Sewage sludge has become a primary location for the accumulation of incoming microplastics in WWTPs. The MPs entering and leaving each unit process were varied due to the unique characteristics of MPs, and their different treatment efficiencies. While the extended hydraulic retention period in decentralized WWTPs decreased the MP removal efficacy, the centralized WWTP with the two-stage activated sludge process achieved the highest MP removal efficiency. © 2024 The Authors

关键词： Microplastic

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Exploring 3D Reconstruction with Drone Images: Advances and Challenges in Urban Environments

Exploring 3D Reconstruction with Drone Images: Advances and ...

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Annual Conference of Industrial Electronics Society

作者： Thiago João Miranda Baldivieso Taise Grazielle Da Silva Batista Fabio Suim Chagas Luiz Carlos Pacheco Rodrigues Velho Paulo Fernando Ferreira Rosa Defense Engineering Graduate Program Military Institute of Engineering Rio de Janeiro Brazil State Institute of the Environment Inea/RJ Rio de Janeiro Brazil Department of Science and Industry Systems University of South-Eastern Norway Kongsberg Norway Department of Computer Graphics Institute for Pure and Applied Mathematics Rio de Janeiro Brazil Electrical Engineering Graduate Program Military Institute of Engineering Rio de Janeiro Brazil

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

This working-in-progress paper aims to present a three-dimensional reconstruction using aerial images in different environments. The experiments were conducted with aircraft in both external and internal settings, starting with image acquisition, followed by the application of specific photogrammetry software—both commercial and open-source—and concluding with a qualitative evaluation of the results.

关键词： Industrial electronics Three-dimensional displays Urban areas Aircraft Image reconstruction Photogrammetry Drones

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Plugging Effect of Fine Pore Water in Opc and LC3 Paste During Accelerated Carbonation Monitored Via Single-Sided Nuclear Magnetic Resonance Spectroscopy

SSRN

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SSRN 2024年

作者： Cheng, Luge Kurihara, Ryo Ohkubo, Takahiro Kitagaki, Ryoma Suda, Yuya Teramoto, Atsushi Maruyama, Ippei Department of Architecture Graduate School of Engineering The University of Tokyo Tokyo113-8656 Japan Department of Applied Chemistry and Biotechnology Graduate School of Engineering Chiba University Chiba263-8522 Japan Division of Human Environmental Systems Graduate School of Engineering Hokkaido University Sapporo060-8628 Japan Department of Architecture Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8527 Japan Civil Engineering Program Faculty of Engineering University of the Ryukyus Okinawa903-0213 Japan Nagoya University Japan

This study focuses on the investigation of the influence of CO2 concentration on the carbonation process in cementitious paste using ordinary Portlandite cement and limestone-calcined clay cement, specifically on the water content distribution. Employing single-sided nuclear magnetic resonance spectroscopy for water profiling, we revealed that the water content of fine pores (interlayer space and gel pores) was consistent at the carbonation front under accelerated carbonation processes with CO2 concentrations of 5% and 1%, demonstrating the plugging effect where fine pore water governs the carbonation progress. This effect was absent under natural carbonation conditions because of the carbonation process was slower than drying. It was confirmed that the rate-determining mechanisms of natural and accelerated carbonation with CO2 concentrations greater than 1% were different. © 2024, The Authors. All rights reserved.

关键词： Carbonation

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Effective monitoring of environmental hazardous drug moxifloxacin hydrochloride using silver selenide on octadecyl amine modified reduced graphene oxide composite

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Journal of Environmental Chemical engineering 2024年第1期12卷

作者： Hwa, Kuo-Yuan Ganguly, Anindita Graduate Institute of Organic and Polymeric Materials National Taipei University of Technology Taipei China Department of Molecular Science and Engineering National Taipei University of Technology Taipei China International Graduate Program in Energy and Optoelectronic Materials National Taipei University of Technology China

The precise detection of antibiotics is very critical. Here, silver selenide (Ag2Se) nanorods are hydrothermally synthesized and ultrasonically treated with rGO surface modified with octadecylamine (rGO-ODA). The optical, structural, morphological, and functional analysis were performed which revealed the orthorhombic pattern of the P2221 E space group, the crystalline purity of Ag2Se, and the substantial composite formation. The morphological studies revealed nanorod like structure of the Ag2Se material and wrinkled sheets of rGO-ODA. A sensor that detects moxifloxacin hydrochloride (MOXH) antibiotic using the cyclic voltammetry (CV), differential pulse voltammetry (DPV) and UV-Vis absorbance was developed. For DPV analysis, a quite low value for detection limit 12.46 nM was exhibited with 0.199 μM – 425.16 μM linear range, and a sensitivity of 5.0439 μA M−1cm−2. For UV-Vis, the sensor demonstrated a very low limit of detection 17.42 nM over 0.12 μM – 7.7 μM working range. The use of this sensor was validated in real-time analysis with industrial waste water, fish, human blood, and urine samples. The results suggested an excellent rate of analyte recovery and enhanced efficiency for MOXH detection with a potential for commercialization in the future. © 2023

关键词： Nanorods

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Effect of Laying Parameters and Non-sinusoidal Loading Condition of High-Voltage Underground Cables on Electrical Performance by Finite Element Method

Effect of Laying Parameters and Non-sinusoidal Loading Condi...

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Power Tech Conference

作者： Yunus Berat Demirol Özcan Kalenderli Graduate School of Electrical Engineering Program Istanbul Technical University Istanbul Turkey Faculty of Electrical and Electronics Engineering Istanbul Technical University Istanbul Turkey

Depending on the bonding type, screen currents and screen voltages of high-voltage underground cables have critical importance in the distribution system. These parameters directly affecting energy efficiency and operational safety need to be calculated and evaluated during the system design. Especially in electric vehicle charging stations, energy storage facilities, solar power plants, oil and gas production facilities, and data centers, these parameters become even more critical because of operating with non-sinusoidal loading conditions. It is seen that studies evaluating the electrical performances of high-voltage cables depending on their harmonic loading conditions and ge-ometrical placement characteristics are limited in the literature. This study investigates the screen voltage, screen current, and loss performance of a high-voltage underground cable system consisting of two parallel circuits in different bonding types and layouts depending on the distance between the cables and the non-sinusoidal loading conditions. For this purpose, the cable system was modeled and analyzed in FEM software. In addition, the calculations performed with the finite element method were also verified by the IEC 60287-1-3 method. The study evaluated the performance of the high-voltage underground cable system for a distribution network and emphasized that these analyses should be carried out during the system design.

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Quantitative Analysis of Ankle Spasticity Through Electromyography Signal

Quantitative Analysis of Ankle Spasticity Through Electromyo...

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Medical Technologies National Conference (TIPTEKNO)

作者： Ayse Gurluk Hafiz Muhammad Bilal Elif Hocaoglu Living Robotics Laboratory Graduate School of Health Sciences Physiotherapy and Rehabilitation Program Istanbul Medipol University Istanbul Türkiye Living Robotics Laboratory Graduate School of Engineering and Natural Sciences Electrical-Electronics Engineering and Cyber-Systems Program Istanbul Medipol University Istanbul Türkiye Department of Electrical and Electronics Engineering Living Robotics Laboratory Istanbul Medipol University Istanbul Türkiye

ISBN: (数字)9798331529819

ISBN: (纸本)9798331529826

This study presents a more accurate evaluation method for assessing ankle spasticity compared to conventional goniometric techniques by utilizing measurements obtained from Inertial Measurement Units (IMU) and surface electromyography (sEMG) devices. Integrating IMU and EMG sensors provides substantial benefits for accurately determining the range of motion (ROM) associated with spasticity during targeted movements. In this study, the proposed method provides precise measurement and an objective evaluation of onset time detection of antagonistic muscle co-contraction, and accordingly the ROM of the actuated joint. Moreover, the implementation of cost-effective wearable sensors enables the monitoring of muscle spasticity in clinical environments and can be particularly valuable in regions with limited access to experienced therapists, providing a more efficient approach to tracking spasticity levels.

关键词： Ankle Measurement units Inertial navigation Muscles Electromyography Sensors Reliability Motion control Read only memory Monitoring

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A Novel Design of Elliptical S-Chiral MetaComposite: The Finite Element/Experimental Data Approach 38

A Novel Design of Elliptical S-Chiral MetaComposite: The Fin...

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38th Technical Conference of the American Society for Composites, ASC 2023

作者： Mello, Nathalia Avila, Antonio Ferreira Universidade Federal de Minas Gerais Mechanical Engineering Graduate Studies Program MG Belo Horizonte31270-901 Brazil Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering MG Belo Horizonte30510-000 Brazil Universidade Federal de Minas Gerais Department of Mechanical Engineering MG 31279-901 Brazil

ISBN: (纸本)9781605956916

This paper addresses a new concept of chiral metastructure the so-called elliptical S-shape chiral. All five groups of metamaterials studied exhibited large anisotropy. This the anisotropic behavior is controlled by the ellipses' eccentricities. Moreover, the anisotropic response is also more evident when the loading axes are considered. For x-axis compressive loading conditions, the stiffness decreases as the ellipse eccentricity increases. The Poisson ratio's magnitude increases with the increase of a/b aspect ratio, showing a very high auxeticity when the ellipse is close to a flat configuration. In this case, the Poisson ratio was near to -18. For y-axis compressive loadings, the stiffness increases with the decrease of a/b aspect ratio leading to a flexible metastructure. The Poisson ratio's values decreases with the increasing of a/b aspect ratio, but all values were near zero (between -0.35 and -0.05). It seems that the transversal section practically does not change when the metastructure is compressed through y-direction. © 2023 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.

关键词： Poisson ratio

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