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Modulations of ocean-atmosphere interactions on squid abundance over Southwest Atlantic

Environmental research 2024年 250卷 118444页

作者： Ko, Chia-Ying Lee, Yu-Chi Wang, Yi-Chi Hsu, Huang-Hsiung Chow, Chun Hoe Chen, Ruei-Gu Liu, Tsung-Han Chen, Chih-Shin Chiu, Tai-Sheng Chiang, Don-Hsieh Wu, Ren-Fen Tseng, Wan-Ling Institute of Fisheries Science National Taiwan University Taiwan Biodiversity Research Center Institute of Ecology and Evolutionary Biology Department of Life Science and Master's Program in Biodiversity National Taiwan University Taiwan Ocean Center National Taiwan University Taiwan Research Center for Environmental Changes Academia Sinica Taiwan Department of Earth and Planetary Sciences University of California Riverside United States Department of Marine Environmental Informatics National Taiwan Ocean University Taiwan Fisheries Research Institute Ministry of Agriculture Taiwan Institute of Marine Affairs and Resource Management National Taiwan Ocean University Taiwan Overseas Fisheries Development Council of the Republic of China Taiwan International Degree Program in Climate Change and Sustainable Development National Taiwan University Taiwan

Anthropogenic shifts in seas are reshaping fishing trends, with significant implications for aquatic food sources throughout this century. Examining a 21-year abundance dataset of Argentine shortfin squids Illex argentinus paired with a regional oceanic analysis, we noted strong correlations between squid annual abundance and sea surface temperature (SST) in January and February and eddy kinetic energy (EKE) from March to May in the Southwest Atlantic. A deeper analysis revealed combined ocean-atmosphere interactions, pinpointed as the primary mode in a rotated empirical orthogonal function analysis of SST. This pattern produced colder SST and amplified EKE in the surrounding seas, factors crucial for the unique life stages of squids. Future projections from the CMIP6 archive indicated that this ocean-atmosphere pattern, referred to as the Atlantic symmetric pattern, would persist in its cold SST phase, promoting increased squid abundance. However, rising SSTs due to global warming might counteract the abundance gains. Our findings uncover a previously unrecognized link between squids and specific environmental conditions governed by broader ocean-atmosphere interactions in the Southwest Atlantic. Integrating these insights with seasonal and decadal projections can offer invaluable information to stakeholders in squid fisheries and marine conservation under a changing climate. © 2024 The Authors

关键词： Surface temperature

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Component Criticality Rating of a Subsea Manifold using FMECA 32nd

Component Criticality Rating of a Subsea Manifold using FMEC...

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32nd European Safety and Reliability Conference, ESREL 2022

作者： Nicolau, Andressa S. Martins, Maximiano C. Paulo, Fernando F. Melo, Frutuoso E. Schleder, Adriana M. Martins, Marcelo R. De Barros, Leonardo O. Orlowski, Rene Thiago C. COPPE Graduate Program of Nuclear Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil LabRisco Analysis Evaluation and Risk Management Laboratory Naval Architecture and Ocean Engineering Department University of Sao Paulo Sao Paulo Brazil CENPES Research and Development Center of Petrobras Petrobras Brazil

ISBN: (纸本)9789811851834

Subsea manifold is a metallic structure fixed to the seabed, in which valves and accessory equipment are installed that make it possible to couple Wet Christmas Trees and other production systems (such as Pipeline End Manifold, Pipeline End Termination and risers);it is required during the completion and production of oil and gas wells. The failure of the subsea manifold can cause serious damage to the environment and human health, as well as stop production causing the loss of large foreign exchange, so ensuring its integrity is extremely important for the sector. In this article a Failure Mode, Effects and Criticality Analysis is presented for the criticality classification of the components of a typical subsea manifold cluster, Pipeline end manifold and Pipeline end termination. The final effect of equipment failure in the manifold was evaluated as a function of production interruption, production reduction, rupture, environmental pollution, plugging, leakage and structural collapse. Different means of detection were considered. The results of this study provide information about the weakness of the subsea manifold equipment. It is expected that this paper can contribute to future analysis of similar equipment and means to contribute to future work involving risk analysis, and inspection maintenance plan. © 2022 ESREL2022 Organizers. Published by research Publishing, Singapore.

关键词： Christmas trees (wellheads)

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Baseline Data for a Cedar Tree Revetment Monitoring Site near Wichita, Kansas

Baseline Data for a Cedar Tree Revetment Monitoring Site nea...

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作者： Shelley, J. E Chrisman, N. J Haring, C. P Engineer Research and Development Center (U.S.) Vicksburg MS Army Corps of Engineers Vicksburg MS National Regional Sediment Management Program

This US Army Corps of Engineers (USACE) National Regional Sediment Management technical note (RSM-TN) documents baseline data collected at a cedar tree revetment installation on a small creek near Wichita, KS. These data can be used in subsequent years to add to the understanding of the longevity, effectiveness, and failure modes of cedar tree revetments as bank stabilization.

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Crew Endurance Training program for the US Navy

Crew Endurance Training Program for the US Navy

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作者： Shattuck, N. L Matsangas, P Barger, L. K Weaver, M. D Naval Postgraduate School Monterey CA NAVAL MEDICAL RESEARCH CENTER SILVER SPRING MD Naval Medical Research Center Silver Spring MD Naval Advanced Medical Development Program

The Crew Endurance Training program was designed to provide fleet-wide support to the US Navy on the successful implementation of circadian-based watchbills, and guidance on sleep management and crew endurance best practices. The first phase of the study included the evaluation of existing educational programs and the analysis of training needs. Combining information from studies conducted by the Naval Postgraduate School Crew Endurance team on USN ships, the expertise of the Sleep Matters Initiative (SMI), and feedback from active-duty service members (ADSMs), we developed the first version of training materials in 2019. The second phase of the project included the delivery of the training program, its assessment, and the analysis and refinement of the training. This iterative procedure was repeated throughout the second phase of the project. The training was provided to more than 1,160 ADSMs, both USN Sailors and Marines. Overall, the responses from all audiences were positive with a high level of satisfaction with the training provided in terms of understanding the importance of sleep, sleep hygiene practices, the effect of sleep on operational performance and endurance, how best to implement circadian-based watchbills, and with the instructors, course content, and training duration. In general, trainees asked for more in-depth information, but operational commitments limited the time available to answer all questions. Also, we updated the Crew Endurance website to support sharing of lessons learned and best practices for the individual and the command. The website includes references, tools, and training materials for use by the warfighter and shipboard leaders, as well as templates for shipboard watchbills and instructions to support circadian-based watchbills.

关键词： Health services Medical personnel Psychology Students Human factors engineering Navy Personnel management Social media Sleep disorders Hospitals Military training United states Warfare Human behavior Institutional review board Management personnel Military personnel

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IoT and Peer-to-peer Signal Notification Methods Reduce the Time Needed to Detect Wildfire Heat Points

IoT and Peer-to-peer Signal Notification Methods Reduce the ...

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International Conference on Green Technology and Sustainable development (GTSD)

作者： Nattawat Panlawan Teerasak Somsak Jutturit Thongpron Worrajak Muangjai Montri Ngaodet Visut Assanavijit Phiched Thanin Suriyon Sungkham Kosol Oranpiroj Noppom Patcharaprakiti Peeraya Somsak Kan Nakaiam Faculty of Engineering RMUTL Program in Electrical Engineering Chiang Mai Thailand College of Integrated Science and Technology RMUTL Chiang Mai Thailand Research and Development Institute RMUTL Chiang Mai Thailand Faculty of Business Administration and Liberal Arts RMUTL Chiang Mai Thailand

ISBN: (数字)9798350386073

ISBN: (纸本)9798350386080

The issue of dust and smoke resulting from forest fires in northern Thailand. This is caused by people burning the forest to get forest products. Individuals can start forest fires by intentionally burning the forest to extract forest resources. Deforestation negatively affects the well-being of vulnerable patients and has repercussions on public health. The decrease in tourist numbers impacts the economy. Individuals setting fire to the forest to gather forest resources impact government and public sector connections. The education sector has implemented many strategies to educate and mitigate forest fires. There is a fire suppression system. Remove garbage, leaves, and branches that are flammable. However, forest fires remain a concern. Collaboration among three entities in the community can aid in preventing unauthorized forest fires through communal procedures. From multiple ministries, the local organization department, and the central government Collaborating to safeguard Forest fire suppression and afforestation This study is a component of the forest fire surveillance division. If the forest fire's location is not clearly indicated, participating in combined operations will lead to issues because of the overlap in operational responsibilities. Previously, thermal imaging satellites were utilized for coordinate determination. If the satellite completes two orbits each day and identifies a hot location, it initiates a forest fire. Firefighters cannot reach the area to put out forest fires; thus, they need to enter from a nearby, accessible location. Joining the forest fire prevention volunteer organization is challenging and will require approximately 24 to 25 hours. This study aims to conserve energy by utilizing an loT system that transmits peer-to-peer signals. Individuals are prepared to dismantle this system. The villagers can develop it themselves due to its modest cost of $10. During a forest fire (temperature exceeding 50 degrees Celsius), specific ope

关键词： Meters Heating systems Temperature distribution Wildfires Satellites Government Forestry

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An Organic Weed Control Prototype using Directed Energy and Deep Learning

arXiv

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arXiv 2024年

作者： Cao, Deng Zhang, Hongbo Dhillon, Rajveer Department of Computer Science Central State University WilberforceOH United States Department of Engineering Technology Middle Tennessee State University MurfreesboroTN United States Department of Agriculture Research and Development Program Central State University WilberforceOH United States

Organic weed control is a vital to improve crop yield with a sustainable approach. In this work, a directed energy weed control robot prototype specifically designed for organic farms is proposed. The robot uses a novel distributed array robot (DAR) unit for weed treatment. Soybean and corn databases are built to train deep learning neural nets to perform weed recognition. The initial deep learning neural nets show a high performance in classifying crops. The robot uses a patented directed energy plant eradication recipe that is completely organic and UV-C free, with no chemical damage or physical disturbance to the soil. The deep learning can classify 8 common weed species in a soybean field under natural environment with up to 98% accuracy. Copyright © 2024, The Authors. All rights reserved.

关键词： Weed control

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Novel cubic heterojunction Fe2O3/ZnO composite for the photocatalyst application

Novel cubic heterojunction Fe2O3/ZnO composite for the photo...

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International Conference on Advanced Materials in Environment, Energy and Health Applications, AMEEHA 2022

作者： Hemnil, P. Prapawasit, Y. Karthikeyan, V. Wongwuttanasatian, T. Seithtanabutara, V. Energy Engineering Program Faculty of Engineering Khon Kaen University 40002 Thailand Mechanical Engineering Division Khon Kaen University Khon Kaen40002 Thailand Center for Alternative Energy Research and Development Khon Kaen University Thailand Department of Chemical Division Khon Kaen University Khon Kaen40002 Thailand

Dye Sensitize Solar Cell (DSSC) gained attention as a replacement for silicon solar cells owing to operational and economic benefits. This study aims to synthesize the Fe2O3/ZnO composites using two different methods;Hydrothermal-calcination (HTC) and Hydrothermal (HT) method. The prepared samples structural properties were analysed using XRD, SEM/EDX, BET, FTIR, and TGA. It was found that the HT-Fe2O3/ZnO composite had a lower crystalline peak with a higher specific area of 34.855m2/g than HTC-Fe2O3/ZnO composite as the formation of ZnO and Fe2O3 was well hybrid structure via atomic substitution mechanism. The particle characterization of HTC-Fe2O3/ZnO showed that Fe2O3 surrounding ZnO and had the composition of Fe, Zn and O of 16.71wt%, 62.90wt% and 20.39wt%, respectively. HT-Fe2O3/ZnO showed a cubic structure with higher content ot Fe (47.63wt%), lower content of Zn (34.89wt%) and O (17.48wt%). Both composites prepared from HT and HTC methods attained high absorbency in the ultra-violet and visible range, advantageously HT-Fe2O3/ZnO exhibits better absorbance in the visible light range, thus, resulting in a band gap energy is lower to 2.98eV. Therefore, HT-Fe2O3/ZnO material is recommended for DSSC to achieve higher performance. © 2022 Elsevier Ltd.

关键词： Zinc oxide

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Non-Isocyanate Polyurethane Platform for Sustainable and Advanced Rain-Erosion Resistant Coatings

Non-Isocyanate Polyurethane Platform for Sustainable and Adv...

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作者： Mannari, V Zareanshahraki, F Asemani, H Mirabedini, S Iren, N Scott, O EASTERN MICHIGAN UNIV YPSILANTI STRATEGIC ENVIRONMENTAL RESEARCH AND DEVELOPMENT PROGRAM ALEXANDRIA VA

Design and develop isocyanate free customized building blocks for PU using cyclic carbonate/amine chemistry Develop two coating systems that meet technical and environmental requirements of SON 1602. *** component high solid coating systems (2K-HS-NIPU) 2.100% Solid UV Curable Coating systems (UV NIPU) Test and evaluate these coatings to demonstrate performance and environmental benefits. Identify best prototypes for extensive evaluation, including Rain Erosion Testing atWPAFB, in comparison with commercial benchmark (CAAPCO C W4) Develop a roadmap for strategic transition plan by cooperative development with industrypartners and end user DoD sites

关键词： Chemistry Department of defense Mechanical properties Coatings Films Rain erosion Resistance Erosion resistance Leading edges Organic coatings Polymers Resilience Amines Chemical synthesis Erosion Polyurethanes Resins

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Investigation of Sources of Sediment Associated with Deposition in the Calcasieu Ship Channel

Investigation of Sources of Sediment Associated with Deposit...

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作者： Brown, G. L Luong, P. V ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ARMY CORPS OF ENGINEERS WASHINGTON DC Army Corps of Engineers Vicksburg MS Regional Sediment Management Program

The Calcasieu Ship Channel (CSC) is a deep-draft federal channel located in southwest Louisiana. It is the channelized lowermost segment of the Calcasieu River, connecting Lake Charles to the Gulf of Mexico. With support from the Regional Sediment Management program, the US Army Corps of Engineers, New Orleans District, requested that the US Army Engineer research and development Center, Coastal and Hydraulics Laboratory, perform an investigation of the potential sources of sediment associated with dredging in the CSC. A previous study had quantified sediment from known sources, indicating that the known sediment sources contribute approximately only 21% of the volume that is regularly dredged from the channel. This technical report details the results of the current study, which employed multiple methods, including numerical analysis, to identify potential additional sources of sediment by first examining the available literature and the modeled energetics and flow pathways, and then estimating the quantities of sediment associated with these identified sources that may be contributing to the shoaling of the CSC. The results of these efforts were used to update the original sediment budget with estimates of the contributions from two additional sources: the erosion of interior wetlands and coastally derived sediments.

关键词： Sedimentation Engineering Army corps of engineers Numerical analysis Engineers Dredging Floods Hydraulics Sediments Literature Louisiana Simulations Storm surges Three dimensional Waterways Water Water resources

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Examination of Wildland Fire Spread at Small Scales Using Direct Numerical Simulations and Frequency Comb Laser Diagnostics

Examination of Wildland Fire Spread at Small Scales Using Di...

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作者： Hamlington, P. E Daily, J. W Rieker, G. B Farnsworth, J Hannigan, H Michelsen, H Coburn, S Lapointe, C Callahan, C Glusman, J Kolb, E Makowiecki, A Sardana, P Sheppard, S Simons-Wellin, S Wimer, N Breda, T Dawlatzai, A Kling, C Poludnenko, A. Y Hoffman, C. M University of Colorado Boulder CO STRATEGIC ENVIRONMENTAL RESEARCH AND DEVELOPMENT PROGRAM ALEXANDRIA VA

The primary objective of this project was to understand and characterize wildland fire spread at small scales (roughly 1m1mm) using high fidelity directand large eddy simulations (DNS and LES, respectively) with reduced chemical kinetic mechanisms calibrated using data from frequency comb laserdiagnostics (FCLD). Specific objectives of this project were to (i) Understand and characterize wildland fire spread at scales from roughly 1m tobelow 1mm using DNS and LES to directly resolve relevant fluid and chemical processes. (ii) Develop and calibrate reduced chemical kineticsmechanisms for the pyrolysis, ignition, and combustion of wildland fuels. (iii) Use frequency comb laser diagnostics to study wildland fire spread at smallscales by providing data for the calibration of reduced chemical mechanisms and for simulation validation. (iv) Use insights from the computations andexperiments to perform improved simulations of wildland fire spread at landscape scales.

关键词： Computational fluid dynamics Chemical reactions Fluid flow Lasers Combustion Boundary layer Chemistry Fluid dynamics Frequency combs Large eddy simulation Buoyancy Physics laboratories Turbulent mixing Chemical reaction properties Computational science Mechanical properties Fires

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