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Factors that affect the behavior of shallot farmers in the use of pesticides in Brebes Regency, Central Java, Indonesia

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IOP Conference Series: Earth and Environmental Science 2019年第1期399卷

作者： E Nining R Syarief Machfud Sobir Z A Mas'ud Study Program for Natural Resources and Environmental Management Postgraduate School IPB University Department of Food Science Faculty of Agricultural Technology IPB University Department of Agricultural Science Technology Faculty of Agricultural Technology IPB University Department of Agronomy and Horticulture Faculty of Agriculture IPB University Department of Chemistry Faculty of Mathematics and Natural Sciences IPB University

The using of pesticides in shallot cultivation in the Brebes Regency is very intensive. It can have an impact on health and the environment. Several factors influence the behavior of shallots farmers in the use of pesticides. The purpose of this research was to identify the dominant factors that influence the behavior of shallots farmers in the use of pesticides. Interviews were conducted on 228 shallots farmers in Brebes, Central Java, Indonesia. Information collected includes the behavior of farmers in the use of pesticides, the characteristics of farmers, agricultural facilities, and farmers' knowledge of pesticides. Data analysis used Structural Equation Modeling (SEM) techniques. Based on the results of the analysis, that the behavior of farmers in the use of pesticides was influenced by the characteristic factors of 8%, agricultural facilities 26% and knowledge by 36%. The variables that have the most influence on the characteristic factors were the length of farming, the factor of the facility was the supply of seeds, and the factor of knowledge was information between groups. The dominant factor that most influences the behavior of farmers in the use of pesticides was the knowledge factor with the most dominant variable was the information between groups. Based on our study, it was revealed that effective counseling about the wise use of pesticides could be done through empowering farmer groups.

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Explainable Machine Learning for Anaerobic Digestion: A Critical Review

SSRN

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SSRN 2022年

作者： Li, Wangliang Gupta, Rohit Zhang, Le Liu, Hongtao Zhang, Zhikai Hou, Jiayi You, Siming Ok, Yong Sik James Watt School of Engineering University of Glasgow GlasgowG12 8QQ United Kingdom Nanoengineered Systems Laboratory UCL Mechanical Engineering University College London LondonWC1E 7JE United Kingdom Wellcome EPSRC Centre for Interventional and Surgical Sciences University College London LondonW1W 7TS United Kingdom Department of Resources and Environment School of Agriculture and Biology Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China Institute of Geographic Science and Natural Resources Research Chinese Academy of Sciences Beijing100101 China CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Water Resources and Environment Hebei GEO University Hebei Shijiazhuang050031 China Korea Biochar Research Center APRU Sustainable Waste Management Program Division of Environmental Science and Ecological Engineering Korea University Seoul02841 Korea Republic of

Anaerobic digestion (AD) is a traditional process to achieve energy recovery from a variety of organic waste streams. However, the AD performance in terms of biogas production and process stability relies on the cooperation of the functional microbial communities and the operating parameters. The latest progress in machine learning for AD processes including optimization, parametric prediction, perturbation detection, and long-term monitoring were critically reviewed. The explainable data-driven models including black-box machine learning (ML) models and nature-inspired optimization techniques were compared, while summarizing their applications. The review also highlighted the challenges, perspectives, and opportunities for future research of applying ML for AD processes. © 2022, The Authors. All rights reserved.

关键词： Optimization

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From little known area to the extinction race: A survey of herpetofauna in Prevab, Kutai National Park (KNP), Indonesia

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AIP Conference Proceedings 2017年第1期1908卷

作者： Nia Kurniawan Noviati Roziah Muhammad Alif Fauzi Agung Sih Kurnianto Biology Department Faculty of Mathematics and Natural Sciences University of Brawijaya Jl. Veteran Malang 65145 East Java Indonesia Program of Environmental Resources Management and Development Postgraduate School University of Brawijaya Jl. MT. Haryono Malang 65145 East Java Indonesia

We develop research focused on the environmental quality through a survey of herpetofauna in a threatened area with minimum data. The collected data supported by literature was used to predict the highest threat in the Prevab forest and to recommend a conservation area according to priority. The survey was conducted on three main sites: Senadam lake, camp area, and Buntu river. Each location was surveyed using a Visual Encounter Survey in a 1 km transect, from 7 to 11 p.m. for 3 days (21–23 October 2016). This study has identified 25 species herpetofauna from 76 individuals, consisting of 3 orders: Squamata, Anura, and Crocodilia. The highest number of individuals found were Chalcorana raniceps (n:18), Hemidactylus frenatus (n:7), Hemidactylus platyurus (n:10), Eutropis sp. (n:5), Cyrtodactylus yoshii (n:4), Crocodylus porosus (n:4), Hylarana erythraea (n:3), Varanus salvator (n:3). Two species were categorized as ‘Threatened’ species in the IUCN Red List, and one (Ptychozoon horsfieldii) was categorized as ‘Data Deficient.’ One species, Limnonectes paramacrodon, was categorized as ‘Near Threatened’. There were 2 species categorized as Appendix II CITES: Varanus salvator and Crocodylus porosus. Only one species, Crocodylus porosus, was protected by Indonesia’s regulation. Chalcorana raniceps and Limnonectes paramacrodon were found in high numbers in Buntu river, while the camp area was mostly visited by Hemidactylus platyurus, Hemidactylus frenatus, and Ptychozoon horsfieldii. Senadam lake was found to be the habitat for Crocodylus porosus.

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MAGNETIC SURVEYING FOR BURIED METALLIC OBJECTS

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GROUND WATER MONITORING AND REMEDIATION 1990年第3期10卷 204-211页

作者： BARROWS, L ROCCHIO, JE Larry Barrows received his M.S. and Ph.D. degrees in geophysics from the Colorado School of Mines in 1973 and 1978 respectively. He has worked as a systems engineer on Skylab remote-sensing experiments and as an exploration geophysicist in frontier areas of Alaska. Since 1979 he has specialized in geophysical surveying for ground water and hazardous waste site investigations first as the project geophysicist on a radioactive waste disposal program and then as a research scientist for the U.S. EPA. In 1988 he joined Earth Science and Engineering Inc. and LaCoste and Romberg Gravity Meters Inc. (4807 Spicewood Springs Rd. Bldg. 2 Austin TX 78759). Current projects include using microgravity to detect solution conduits in karst terrains and using seismicgroundroll to determine near-surface shear moduli. Judith E. Rocchio is the future air resource specialist on the Stanislaus National Forest (1977 Greenley Rd. Sonora CA 95370). She will obtain the position upon completion of her M.A. degree in air resource management at Colorado State University Department of Natural Resources (1990). She was with Lockheed Engineering Management Services Co. Las Vegas Nevada prior to attending CSU where she was involved in several environmental monitoring programs and coauthored the paper with Dr. Barrows. From 1981 to 1986 Rocchio was a project geologist for Gower Oil Co. and Consolidation Coal Co. Denver Colorado. She received her B.S. in geology (1981) from the University of Nevada Las Vegas.

Field tests were conducted to determine representative total-intensity magnetic anomalies due to the presence of underground storage tanks and 55-gallon steel drums. Three different drums were suspended from a non-magnetic tripod and the underlying field surveyed with each drum in an upright and a flipped plus rotated orientation. At drum-to-sensor separations of 11 feet, the anomalies had peak values of around 50 gammas and half-widths about equal to the drum-to-sensor separation. Remanent and induced magnetizations were comparable; crushing one of the drums significantly reduced both. A profile over a single underground storage tank had a 1000-gamma anomaly, which was similar to the modeled anomaly due to an infinitely long cylinder horizontally magnetized perpendicular to its axis. A profile over two adjacent tanks had a smooth 350-gamma single-peak anomaly even though models of two tanks produced dual-peaked anomalies. Demagnetization could explain why crushing a drum reduced its induced magnetization and why two adjacent tanks produced a single-peak anomaly. A 40-acre abandoned landfill was surveyed on a 50- by 100-foot rectangular grid and along several detailed profiles. The observed field had broad positive and negative anomalies that were similar to modeled anomalies due to thickness variations in a layer of uniformly magnetized material. It was not comparable to the anomalies due to induced magnetization in multiple, randomly located, randomly sized, independent spheres, suggesting that demagnetization may have limited the effective susceptibility of the landfill material. A different 6-acre site survey conducted on a 10- by 10-foot grid was analyzed to determine the maximum station spacing and line separation that could have been used. Essentially, all of the anomalies at this site would have been resolved by a survey conducted on a 20- by 20-foot grid and the larger anomalies would have been detected by a 50- by 50-foot grid.

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Lessons from the Short-Lived 2021 Fertilizer Import Ban in Sri Lanka Based on Analysis of Nutrient Flows

ACS Sustainable Resource Management

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ACS Sustainable Resource management 2024年第11期1卷 2361-2371页

作者： Maya J. Fein-Cole Mohamed Esham Nilanthi Jayathilake Miriam Otoo Christopher Koliba Gillian L. Galford Katherine K. Porterfield Isuru B. Wijethunga Eric D. Roy Rubenstein School of Environment and Natural Resources University of Vermont 81 Carrigan Drive Burlington Vermont 05405 United States Department of Agribusiness Management Sabaragamuwa University of Sri Lanka Belihuloya 70140 Sri Lanka International Water Management Institute 127 Sunil Mawatha Battaramulla Colombo 10120 Sri Lanka Tetra Tech ARD 1320 North Courthouse Road Arlington Virginia 22202 United States School of Public Affairs and Administration University of Kansas 1445 Jayhawk Boulevard Lawrence Kansas 66045 United States Gund Institute for Environment University of Vermont 210 Colchester Avenue Burlington Vermont 05405 United States Department of Civil and Environmental Engineering University of Vermont 33 Colchester Avenue. Burlington Vermont 05405 United States Department of Soil Science Postgraduate Institute of Agriculture University of Peradeniya Old Galaha Road Peradeniya 20400 Sri Lanka

The Sri Lankan government’s 2021 policy to ban mineral fertilizer imports and shift to green agriculture provides an opportunity to examine the potential for nutrient recycling in a more circular economy. Here, we examined national-level nutrient flows in Sri Lanka to determine the capacity to offset mineral fertilizer with alternative nutrient sources, considering nitrogen (N) and phosphorus (P). Beyond animal manure already applied to croplands, other nutrient sources, including municipal solid waste (MSW) compost and human excreta, have limited potential to offset mineral fertilizer imports. For example, MSW compost and early adoption of nutrient recovery from human excreta could provide N and P equal to only ≤10% of mineral fertilizer use. Furthermore, we used a grid-based resource recovery and distribution model to identify priority areas for the nutrient management transition in Sri Lanka. Reuse of recovered nutrients from MSW compost and human excreta in model scenarios was in urban and peri-urban areas, including home gardens, distant from much of the nation’s agriculture. Our findings reinforce calls for long-term strategic planning for transitions in nutrient management. Future policies should consider fundamental constraints on alternative nutrient sources and emphasize increasing capacity for both effective nutrient recycling and efficient mineral fertilizer *** paper identifies constraints on nutrient availability influencing the outcome of Sri Lanka’s controversial 2021 mineral fertilizer ban and makes broadly applicable recommendations for future agricultural nutrient management transitions.

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Development of Moving Equipment for Fishermen's Catches using the Portable Conveyor System 1

Development of Moving Equipment for Fishermen's Catches usin...

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1st International Conference on Renewable Energy Research and Challenge, ICoRER 2019

作者： Susanto, Herry Hendroko Setyobudi, Roy Muhammad Nur, Syukri Yandri, Erkata Saepul Uyun, Aep Yaro, Abubakar Abdullah, Kamaruddin Krido Wahono, Satriyo Burlakovs, Juris Adhi Nugroho, Yogo Department of Mechanical Engineering Darma Persada University Jl. Taman Malaka Selatan No.22 Jakarta Timur13450 Indonesia School of Renewable Energy Darma Persada University Jl. Taman Malaka Selatan No.22 Jakarta Timur13450 Indonesia Department of Agriculture Science Postgraduate Program University of Muhammadiyah Malang Jl. Raya Tlogomas No.246 Malang65145 Indonesia Institute of Health Sciences and Research Ahro Scientific Publishing 272 Bath Street GlasgowG2 4JR United Kingdom Research Division for Natural Product Technology - Indonesian Institute of Sciences Jl. Jogja Wonosari km 31.5 Gunung Kidul Yogyakarta55861 Indonesia Department of Water Management Estonian University of Life Sciences Friedrich Reinhold Kreutzwaldi la Tartu51014 Estonia Individual Researcher Alumni School of Ipb University Bogor Indonesia Data Processing Rumah Paper - Editage Services Jl. Tokala No.1 East Java65146 Indonesia

Indonesia is an archipelago that has a wealth of marine fish resources, and the country with the second-longest coastline in the world. The improvement witnessed in the economy of Indonesia in recent years, is as a result of the growth experienced in various sectors, among which is the fisheries and marine. To overcome this problem, a portable conveyor system of moving equipment for fishermen's catches was designed. It can be placed at the dock or port where the fishermen are anchored and unloading the fishermen's catches from the sea. It designed to have the ability to move up and down in the moving frame, making this conveyor system can be used both in high tides and low tides of seawater level conditions. The advantage of this portable conveyor system is could be done continuously with a little human power. Other than that, from the results of the calculations, known that with increasing motor rotation, the required traveling time will only become shorter. The resulting conveyor capacity shows an increase. Also, it can use drive motors that are available on the market with a power capacity of 0.37 kW. Therefore, the process of this portable conveyor system can be more efficient. © The Authors, published by EDP Sciences, 2020.

关键词： Fish

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Spatial distribution of water quality in Belawan River, North Sumatra

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IOP Conference Series: Earth and Environmental Science 2021年第1期713卷

作者： A Mirandha Irvan H Wahyuningsih Master Program in Department of Natural Resources and Environmental Management Universitas Sumatera Utara Padang Bulan Medan 20155 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Sumatera Utara Padang Bulan Medan 20155 Indonesia Department of Biology Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Padang Bulan Medan 20155 Indonesia

Belawan river is one of the rivers in North Sumatera Province. Belawan river which crosses Deli Serdang District and Medan City is used for the activities of plantation, agriculture, livestock, sand mining, a place for bathing and washing as well as serving as a lavatory, hospital, hotel, settlements, and industry. Utilization of the river as a wastewater disposal site can cause a decrease in the quality of river water. The purpose of this research was to analyze the Belawan river water quality spatially. Water sampling was taken at nine points which included three upstream segment points in Deli Serdang District, three middle segment points in Deli Serdang District and Medan City, and three downstream segment points in Deli Serdang District. Based on the results of the research it can be concluded that the value of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) at several monitoring points in Belawan river has exceeded the water quality standard limits of class I Government Regulation of Republic of Indonesia Number 82 the year 2001 and North Sumatera Governor Regulation Number 21 the year 2006.

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A bibliometric review on applications of lignocellulosic fibers in polymeric and hybrid composites: Trends and perspectives

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Heliyon 2024年第19期10卷 e38264页

作者： Santos, Caroliny M. Santos, Thiago F. Rao, H Jeevan Silva, F. Higor V.A. Mavinkere Rangappa, Sanjay Boonyasopon, Pawinee Siengchin, Suchart Souza, D.F.S. Nascimento, J.H.O. Postgraduate Program in Chemical Engineering Technology Center Federal University of Rio Grande do Norte Av. Prof. Sen. Salgado Filho 3000 Natal 59072-970 Rio Grande do Norte Brazil Department of Mathematics School of Sciences and Humanities Nazarbayev University Astana 010000 Kazakhstan Natural Composites Research Group Lab Department of Materials and Production Engineering The Sirindhorn International Thai-German School of Engineering (TGGS) King Mongkut's University of Technology North Bangkok (KMUTNB) Bangkok Thailand Department of Design Management and Business Development Faculty of Architecture and Design King Mongkut's University of Technology North Bangkok (KMUTNB) Bangkok Thailand

Over the past 10 years, materials science and engineering have shown increasing interest in incorporating lignocellulosic fibers into polymer and hybrid composites (LCF-CPH). This bibliometric analysis, covering the period 2012 to 2022, examines the current state of research on the application of these fibers in composites, with the aim of identifying significant contributions, new trends, and possible future directions. The analysis included a comprehensive database search using specific criteria, which revealed a significant increase in research activity on a variety of lignocellulosic fibers, such as flax, jute, hemp and sisal. This growth is particularly evident in the packaging, automotive, aerospace and construction industries. Hybrid composites based on these fibers have gained prominence due to their enhanced properties, which include improvements in mechanical, thermal and environmental characteristics. The findings of this research have significant implications for governments, corporations, and academic institutions. Researchers gain a deeper understanding of emerging trends, industry gains valuable insights into the advantages of adopting lignocellulosic fibers, and policymakers gain essential information to support the development of sustainable composites. In the field of advanced composites and sustainable materials, this work lays a solid foundation for future research and industrial applications. © 2024

关键词： Applications Composites natural fibers Polymers

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The dynamic model of paddy field conversion control in Citarum watershed

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IOP Conference Series: Earth and Environmental Science 2019年第1期399卷

作者： I Firmansyah Widiatmaka B Pramudya S Budiharsono Study Program of Natural Resources and Environmental Management IPB University Department of Soil Science and Land Resources Faculty of Agriculture IPB University Department of Mechanical Engineering and Biosystem Faculty of Agriculture Technology IPB University Technical Advisor Ministry of National Development Planning/National Development Planning Agency (BAPPENAS)

The rate of population growth and the increase in food needs for consumption have made the need for paddy fields higher. On the other hand, the pressure on paddy fields is quite intense so that the conversion of paddy fields is quite challenging to be controlled. Moreover, the concerns about food security and food sovereignty have become critical issues. The high demand for land utilization has caused pressure on paddy fields in the Citarum watershed. The objective of this study is to build a model for maintaining paddy fields in the Citarum watershed. The study was conducted from June to September 2015. The method of this research is a modelling using system dynamics approach by simulating time series data. From the simulation, it can be concluded that the rate of conversion of paddy fields will still be high if there is no specific policy in its protection. This fact can be seen from various scenario conditions, either in existing circumstances, in the optimistic scenario, as well as in a moderate scenario. The strategy that can be done is that paddy fields should be specially protected or owned by the government to minimize the rate of conversion.

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Preparation of tungsten trioxide/graphene oxide/ hydroxyapatite (WO₃/GO/HAp) for photocatalytic removal of methylene blue under visible light

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Case Studies in Chemical and Environmental engineering 2024年 10卷

作者： Mizar, Khalid Mulyati, Sri Aprilia, Sri Aulia, Muhammad Prayogie Arahman, Nasrul Postgraduate School of Engineering Studies Universitas Syiah Kuala Banda Aceh 23111 Indonesia Graduate School of Environmental Management Universitas Syiah Kuala Jl. Tgk. Chik Pante Kulu No. 5 Darussalam Banda Aceh 23111 Indonesia Graduate School of Science and Engineering Kobe University Rokkodai Cho Nada Ku Hyogo Kobe Japan Atsiri Research Center PUI Universitas Syiah Kuala Jl. Syeh A Rauf No. 5 Darussalam Banda Aceh 23111 Indonesia Research Center for Environmental and Natural Resources Universitas Syiah Kuala Jl. Hamzah Fansuri No. 4 Darussalam Banda Aceh 23111 Indonesia

The textile industry is one of the leading contributors of liquid waste in the form of synthetic dyes, which significantly contaminate water sources. Heterogeneous photocatalysts employ semiconductors that trigger photocatalytic processes with the assistance of UV or visible light to degrade waste. Tungsten trioxide (WO₃) is a potential semiconductor with a small band gap (2.8 eV) that absorbs visible light. WO₃ was combined with graphene oxide (GO) and hydroxyapatite (HAp) to exploit the ultrasonication method to degrade methylene blue (MB) dye. The results of the SEM-EDX characterization confirm the constituent elements of the WO₃/GO/HAp material. The chemical elements were confirmed by energy-dispersive X-ray spectroscopy. The ability of the original and modified WO₃ photocatalysts (WO₃/HAp, WO₃/GO and WO₃/GO/HAp) to degrade 15 ppm of 50 ml of MB solution at concentrations of 10, 15, and 20 mg for 4 h under visible light was investigated. The breakdown of the methylene blue dye demonstrated that the reaction speed followed a first-order pattern. Meanwhile the adsorption isotherm better fit Langmuir for WO₃/GO and WO₃/GO/HAp. The highest pollutant degradation was achieved using 20 mg WO₃/GO and WO₃/GO/HAp photocatalysts, which achieved efficiencies of 99.1 % and 98.3 %. These results confirm that the WO₃/HAp;WO₃/GO, and WO₃/GO/HAp hybrid photocatalysts exhibit better degradation performance than unmodified WO₃ photocatalysts. Additionally, these photocatalysts can be reused up to three times without experiencing substantial loss in effectiveness. © 2024 The Authors

关键词： Antifouling Photocatalytic degradation Wastewater treatment

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