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Journal articles on the topic 'International grid codes'

Author: Grafiati

Published: 11 December 2022

Last updated: 31 July 2025

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1

Murdan, Anshu, Iqbal Jahmeerbacus, and S. Z. Sayed Hassen. "Challenges of existing grid codes and the call for enhanced standards." Clean Technologies and Recycling 3, no. 4 (2023): 241–56. http://dx.doi.org/10.3934/ctr.2023015.

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<abstract> <p>The escalating penetration of renewable energy, notably wind and solar, introduces unique complexities into power systems, particularly in frequency and voltage regulation. Current grid codes are inadequate for these emerging dynamics, necessitating significant enhancements to cope with the evolving energy landscape. The paper highlights several pivotal areas of improvement, including increased flexibility within power systems, integration of energy storage systems, expansion of ancillary services, the inclusion of grid-forming inverters, and the international harmoni

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Dzobo, Oliver, Lucas Tivani, and Lindani Mbatha. "A review of smart inverter capabilities for managing high levels of distributed energy resource integration in South Africa’s power grid." Journal of Energy in Southern Africa 34, no. 1 (2024): 1–20. http://dx.doi.org/10.17159/2413-3051/2023/v34i1a18055.

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Distributed energy resources (DERs), including solar panels, wind turbines, and battery storage, are becoming more prevalent in power grids. This increased penetration necessitates a closer look at how they impact the grid's operation. Power grid operators face challenges in ensuring the secure operation of the network in the presence of DERs. This includes managing voltage fluctuations, integrating diverse energy sources, and preventing grid overloads. This paper reviews the impacts of DERs on power grid operation and discusses strategies for enhancing the integration of DERs in South Africa’

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Tan, Nadia M. L., Agileswari K. Ramasamy, Vigna K. Ramachandaramurthy, Marayati Marsadek, Mohd R. Othman, and Ibrahim Ariffin. "Utility-scale photovoltaic generators: a review on trends, grid code requirements and challenges." Indonesian Journal of Electrical Engineering and Computer Science 18, no. 2 (2020): 573. http://dx.doi.org/10.11591/ijeecs.v18.i2.pp573-585.

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<p>This paper provides an overview of the global trends in utility-scale photovoltaic (PV) installed capacity. This paper also presents a comparison of grid-connection requirements of six countries in the continents of Europe, Asia, Africa, and Australia for utility-scale PV generators in normal and abnormal grid conditions. Many country-based grid codes and international standards (IEEE 1547) for interconnection of inverter-based renewable energy generators are demanding stricter grid-connection compliance from utility-scale PV generators to ensure power system safety and reliability as

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Nadia, M. L. Tan, K. Ramasamy Agileswari, K. Ramachandaramurthy Vigna, Marsadek Marayati, R. Othman Mohd., and Ariffin Ibrahim. "Utility-scale photovoltaic generators: a review on trends, grid code requirements and challenges." Indonesian Journal of Electrical Engineering and Computer Science (IJEECS) 18, no. 2 (2020): 573–85. https://doi.org/10.11591/ijeecs.v18.i2.pp573-585.

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This paper provides an overview of the global trends in utility-scale photovoltaic (PV) installed capacity. This paper also presents a comparison of grid-connection requirements of six countries in the continents of Europe, Asia, Africa, and Australia for utility-scale PV generators in normal and abnormal grid conditions. Many country-based grid codes and international standards (IEEE 1547) for interconnection of inverter-based renewable energy generators are demanding stricter grid-connection compliance from utility-scale PV generators to ensure power system safety and reliability as its pene

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Li, Le, Donghai Zhu, Xudong Zou, Jiabing Hu, Yong Kang, and Josep M. Guerrero. "Review of frequency regulation requirements for wind power plants in international grid codes." Renewable and Sustainable Energy Reviews 187 (November 2023): 113731. http://dx.doi.org/10.1016/j.rser.2023.113731.

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A., M. Shiddiq Yunus, Saini Makmur, and Abu-Siada Ahmed. "Dynamic performance comparison of DFIG and FCWECS during grid faults." TELKOMNIKA Telecommunication, Computing, Electronics and Control 17, no. 2 (2019): 1040–46. https://doi.org/10.12928/TELKOMNIKA.v17i2.11747.

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Among several types, variable speed-based wind turbine generator (WTG) is the most popular type installed worldwide. This type of WTG is able to extract 5% more energy from wind speed compared to the fixed speed WTG. There are two kinds of variable speed based WTG; Doubly Fed Induction Generator (DFIG) and Full Converter Wind Energy Conversion System (FCWECS). DFIG and FCWECS are placed at the first and second topWTG installation worldwide since 2004. However, both of them are very sensitive to the grid dip fault and may violate the allowable margins identified by various international Fault R

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Fusero, Michele, Andrew Tuckey, Alessandro Rosini, Pietro Serra, Renato Procopio, and Andrea Bonfiglio. "A Comprehensive Inverter-BESS Primary Control for AC Microgrids." Energies 12, no. 20 (2019): 3810. http://dx.doi.org/10.3390/en12203810.

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This paper proposes the design of a comprehensive inverter-BESS primary control capable of providing satisfactory performances both in grid-connected and islanded configurations as required by international standards and grid codes, such as IEEE Std. 1547. Such control guarantees smooth and fast dynamic behavior of the converter in islanded configuration as well as fast power control and voltage-frequency support in grid-connected mode. The performances of the proposed primary control are assessed by means of EMT (ElectroMagnetic Transients) simulations in the dedicated software DIgSILENT Powe

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Li, Li. "An Initial Investigation of Adjoint-Based Unstructured Grid Adaptation for Vortical Flow Simulations." Modelling and Simulation in Engineering 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/217326.

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A computational fluid dynamics (CFDs) method utilizing unstructured grid technology has been employed to compute vortical flow around a65°delta wing with sharp leading edge, which is specially known as the geometry of the second international vortex flow experiment (VFE-2). In VFE-2,65°delta wings with different leading edges had been broadly investigated by experiments, which resulted in a special database for CFDs codes validation. The emphasis of this paper is to investigate the effectiveness of an adjoint-base grid adaptation method for unstructured grid in capturing concentrated vortices

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Mohseni, Mansour, and Syed M. Islam. "Review of international grid codes for wind power integration: Diversity, technology and a case for global standard." Renewable and Sustainable Energy Reviews 16, no. 6 (2012): 3876–90. http://dx.doi.org/10.1016/j.rser.2012.03.039.

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Setti, Mohammed, and Mohamed Cherkaoui. "Low switching frequency modulation for generalized three-phase multilevel inverters geared toward Grid Codes compliance." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 4 (2021): 2349. http://dx.doi.org/10.11591/ijpeds.v12.i4.pp2349-2357.

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In this paper, a generalized three-phase multilevel power inverter (MLI) structure is proposed under asymmetric configurations. The operating mode and the switching combinations are briefly exposed according to the parity of the number of direct current (DC) voltage sources in use. Subsequently, the proposed topology is evaluated in terms of commonly used factors and then benchmarked against some of the state-of the-art cascaded MLIs featuring multiple DC voltage sources (MDCS-CMLIs) while putting emphasis on the reduction of power switching devices. Moreover, a new nearest level control (NLC)

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Mohammed, Setti, and Cherkaoui Mohamed. "Low switching frequency modulation for generalized three-phase multilevel inverters geared toward Grid Codes compliance." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 4 (2021): 2349–57. https://doi.org/10.11591/ijpeds.v12.i4.pp2349-2357.

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In this paper, a generalized three-phase multilevel power inverter (MLI) structure is proposed under asymmetric configurations. The operating mode and the switching combinations are briefly exposed according to the parity of the number of direct current (DC) voltage sources in use. Subsequently, the proposed topology is evaluated in terms of commonly used factors and then benchmarked against some of the state-of the-art cascaded MLIs featuring multiple DC voltage sources (MDCS-CMLIs) while putting emphasis on the reduction of power switching devices. Moreover, a new nearest leve

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Zhou, Zichun, Honggang Lei, Bin Qiu, Shujia Zhang, and Guoqing Wang. "Experimental Study on Fatigue Performance of M60 High-Strength Bolts with a Huge Diameter under Constant Amplitude Applied in Bolt–Sphere Joints of Grid Structures." Applied Sciences 12, no. 17 (2022): 8639. http://dx.doi.org/10.3390/app12178639.

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The high-strength bolts’ fatigue is critical for the bolt–sphere joints of grid structures under the action of suspended cranes. High-strength bolts with a huge diameter are used more commonly when the span of grid structures and the burden of suspended cranes increase. However, few works have explored the fatigue performance of high-strength bolts with a huge diameter in bolt–sphere joints of grid structures. Thus, this paper examines M60 high-strength bolts with a huge diameter used in the bolt–sphere joints of grid structures. To this end, an AMSLER fatigue testing machine performed fatigue

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Rebollal, David, Miguel Carpintero-Rentería, David Santos-Martín, and Mónica Chinchilla. "Microgrid and Distributed Energy Resources Standards and Guidelines Review: Grid Connection and Operation Technical Requirements." Energies 14, no. 3 (2021): 523. http://dx.doi.org/10.3390/en14030523.

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In this review, the state of the art of 23 distributed generation and microgrids standards has been analyzed. Among these standards, 18 correspond mainly to distributed generation while five of them introduce the concept of microgrid. The following topics have been considered: interconnection criteria, operating conditions, control capabilities, power quality, protection functions and reference variables. The revised national standards cover ten countries on four continents, which represents 80% of the countries with the largest installed renewable capacities. In addition, eight other relevant

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Boorsma, Koen, Gerard Schepers, Helge Aagard Madsen, et al. "Progress in the validation of rotor aerodynamic codes using field data." Wind Energy Science 8, no. 2 (2023): 211–30. http://dx.doi.org/10.5194/wes-8-211-2023.

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Abstract. Within the framework of the fourth phase of the International Energy Agency (IEA) Wind Task 29, a large comparison exercise between measurements and aeroelastic simulations has been carried out featuring three simulation cases in axial, sheared and yawed inflow conditions. Results were obtained from more than 19 simulation tools originating from 12 institutes, ranging in fidelity from blade element momentum (BEM) to computational fluid dynamics (CFDs) and compared to state-of-the-art field measurements from the 2 MW DanAero turbine. More than 15 different variable types ranging from

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Lewandoski, Cristiano Fernando, Reginando Ferreira Santos, Evelyn Tânica Carniatto, Amauri Ghellere Garcia Miranda, João Paulo Man Kit Sio, and Augustine Ikpehai. "TECHNICAL CHALLENGES, IMPACTS AND PERSPECTIVES FOR ELECTRIC VEHICLES (EVS)." International Journal of Environmental Resilience Research and Science 4, no. 1 (2022): 1–14. http://dx.doi.org/10.48075/ijerrs.v4i1.27926.

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Preventing environmental issues and growing concerns about global energy crises are driving the need for new opportunities and technologies that can meet significantly greater demand for cleaner generation and products, zero-carbon, and sustainable energy systems. This requires developing more efficient transport and energy generation. Changing the transport model to electric is a promising approach for ecological systems and for reducing the problems of climate change. This article inspects the current status, latest deployment, and challenging issues when installing an electric vehicle charg

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Afkril, Baina, M. Pramono Hadi, and Slamet Suprayogi. "A New Algorithm For The Grid Cell-Based Runoff Routing Model Based on Travel Time Concept." Geosfera Indonesia 5, no. 2 (2020): 160. http://dx.doi.org/10.19184/geosi.v5i2.17351.

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The grid cell-based routing model has recently been used to simulate direct runoff hydrographs at catchment scales. This study develops a flexible event-based runoff routing algorithm to simulate a direct runoff hydrograph (DRH). The experiment was based on the spatiotemporal inputs of a hydrological data set. The flexibility is based on the time step and grid cell size applied in the original STORE-DHM. Rainfall distribution was obtained using radar data adjusted by the measured point ground, while the runoff yield was determined using the NRCS-CN method. The parameter distribution was captur

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Firdhaus, Ahmad, I. Ketut Suastika, Kiryanto Kiryanto, and Samuel Samuel. "Benchmark Study of FINETM/Marine CFD Code for the Calculation of Ship Resistance." Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 18, no. 2 (2021): 111–18. http://dx.doi.org/10.14710/kapal.v18i2.39727.

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Benchmarking can be used to test CFD programs for selecting turbulence models, grid dependency studies, testing different numerical schemes and source codes, and testing different boundary conditions. CFD simulation in this study uses FINE™/Marine 7.2-1 software. The solver process at NUMECA uses the ISIS-CFD flow solver developed by EMN, which uses the incompressible unsteady Reynolds-average Navier stoke equation (RANSE). The solver is based on the finite volume method, and Turbulence models use SST k-ω models. The free surface flow around a model surface ship (DTMB 5415) advancing in calm w

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Deitz, Dan. "Connecting The Dots With CFD." Mechanical Engineering 120, no. 03 (1998): 90–91. http://dx.doi.org/10.1115/1.1998-mar-4.

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This article focuses on use of computational fluid dynamics (CFD) software in the design of ink-jet printers with accuracy equivalent to laser printers. CFD codes track sharp interfaces through arbitrary deformations and to apply the correct normal and tangential stress boundary conditions. CFD software solves the governing equations for fluid flow, heat transfer, and chemistry at several thousand discrete points on a computational grid in the flow domain. Engineers using CFD can obtain solutions for problems with complex geometries and boundary conditions. The CFD analysis yields values for f

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Llano, Asier, Itziar Angulo, David de la Vega, and Laura Marron. "Virtual PLC Lab Enabled Physical Layer Improvement Proposals for PRIME and G3-PLC Standards." Applied Sciences 10, no. 5 (2020): 1777. http://dx.doi.org/10.3390/app10051777.

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Narrowband (NB) powerline communication (PLC) is extensively adopted by utilities for the communication in advanced metering infrastructure (AMI) systems. PLC technology needs to overcome channel disturbances present in certain grid segments. This study analyzes improvement proposals of the physical layer of the main narrowband PLC technologies approved by international communication organizations that are currently deployed in Europe: Powerline Intelligent Metering Evolution (PRIME) 1.3.6, PRIME 1.4, and G3-PLC, in order to improve PLC performance under channel disturbances. This thorough stu

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Meguro, Wendy, Eileen Peppard, Stephen Meder, James Maskrey, and Riley Josephson. "Going Beyond Code: Monitoring Disaggregated Energy and Modeling Detached Houses in Hawai‘i." Buildings 10, no. 7 (2020): 120. http://dx.doi.org/10.3390/buildings10070120.

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Hawai‘i was the first state to establish a statewide 100% renewable energy goal to be met by 2045. To address the potential impact of new residential construction, a team conducted field studies and developed whole-building energy models of detached houses in Hawai‘i. The goal was to inform the state, a major developer, and the Hawai‘i design community on how current residential design could be modified to meet the newly adopted energy codes and renewable energy goals. Seven houses with air-conditioning were monitored for disaggregated energy use, temperature, and humidity for one year. The bu

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Joseph, B. Bassey, and A. Okposin Wisdom. "DESIGN AND DEVELOPMENT OF A DUAL POWERED AIR COMPRESSOR FOR TYRE INFLATION." International Journal of Recent Research in Civil and Mechanical Engineering (IJRRCME) 11, no. 1 (2024): 19–29. https://doi.org/10.5281/zenodo.11354605.

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<strong>Abstract:</strong> The development of a dual power air compressor system is the main goal of this work. The dual powered system provides a dependable and sustainable power source by combining solar power, grid supply, and a battery storage system. In order to maximize energy efficiency and save operating costs, the system is automated using sensors and Arduino micro-controllers to monitor and manage the systems’ performance. The compressors’ energy requirement was assessed and appropriate selection of solar panel capacity, battery capacity and inverter system to integrate w

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Ahmed, Maher, Moneb Hany, and Sadek Hatem. "Determination of Demand-Side Management Practices affecting Energy Consumption in Egypt: Potential Benefits and Barriers." International Journal of Mechanical and Industrial Technology 10, no. 1 (2022): 10–19. https://doi.org/10.5281/zenodo.6985237.

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<strong>Abstract:</strong> Over the last 30 years, the electricity and renewable energy laws in Egypt had been restructured, and the energy efficiency codes of electricity and buildings had been developed. However, there is a lack of effort towards the end user behavior and there is a need to consider energy savings that can be gained from consumption patterns’ reconstruction. This paper discusses various solutions to the before mentioned matter, while discussing smart grid and demand side planning. Also, the paper explains the steps that should be followed in order to stimulate the cust

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Syed, Ashraf T., and Adel A. Abdou. "A MODEL OF A NEAR-ZERO ENERGY HOME (nzeh) USING PASSIVE DESIGN STRATEGIES AND PV TECHNOLOGY IN HOT CLIMATES." Journal of Green Building 11, no. 1 (2016): 38–70. http://dx.doi.org/10.3992/jgb.11.1.38.1.

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INTRODUCTION Recent development has seen a drastic increase in energy use trends in Saudi Arabian buildings leading to a demand for an effective course of action for energy conservation and production. A case study-based research initiative exploring near-zero energy potential in Saudi Arabia was undertaken. A 4-bedroom detached single-family faculty residence at King Fahd University of Petroleum and Minerals (KFUPM) representing common regional housing design trends was utilized. A base case simulation model of the house was developed and validated using short-term and real-time energy consum

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Altinbilek, Dogan, Karin Seelos, and Richard Taylor. "Hydropower's Role in Delivering Sustainability." Energy & Environment 16, no. 5 (2005): 815–24. http://dx.doi.org/10.1260/095830505774478503.

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Johannesburg's World Summit on Sustainable Development stipulated in its Implementation Plan that hydropower of all scales should be included in the drive to increase the contribution of renewable energy. This can be achieved through the plant-life extension and upgrading of existing schemes, as well as by the sustainable development of new projects according to the needs, opportunities and resources available. Hydropower is the world's largest source of renewable energy used for power generation; it accounts for 19 percent of the world's supply (by 2010 wind power is expected to contribute 0.

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McKeon, Thomas P., Vicky Tam, Wei-Ting Hwang, Paul Wileyto, Karen Glanz, and Trevor M. Penning. "Abstract PR06: Geocoding and integrating multiple environmental exposomics sources: Assessing population hazard to lung carcinogens in 421 zip codes of a cancer center catchment area." Cancer Epidemiology, Biomarkers & Prevention 29, no. 9_Supplement (2020): PR06. http://dx.doi.org/10.1158/1538-7755.modpop19-pr06.

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Abstract To assess risk factors that contribute to lung cancer burden in the Abramson Cancer Center (ACC) catchment area, we integrated geospatial data of exposure to pollutants from publicly available EPA and NASA datasets. The study area covers the 421 zip codes that make up the 12 counties of the catchment area from which most of the ACC patients come. The counties include 5 that surround Philadelphia, 6 in New Jersey, and 1 in Delaware. Environmental exposure data, sourced from US-EPA Air Quality System (AQS) Data Mart, were focused on air pollutants since air pollution is recognized by th

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Anders, Therese. "Territorial control in civil wars: Theory and measurement using machine learning." Journal of Peace Research 57, no. 6 (2020): 701–14. http://dx.doi.org/10.1177/0022343320959687.

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Territorial control is a central variable for civil war research – yet, we lack sufficiently detailed data to capture subnational dynamics and offer cross-country coverage. This article advances a new measurement strategy for territorial control in asymmetric civil wars. Territorial control is conceptualized as an unobserved latent variable that can be estimated via observed variation in rebel tactics. The strategy builds on a theoretical model of rebel tactics, by which rebels use terrorism less when they control a given area – preferring conventional tactics, which require higher levels of t

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Herrmann, Victoria. "Climate Change, Arctic Aesthetics, and Indigenous Agency in the Age of the Anthropocene." Yearbook of Polar Law Online 7, no. 1 (2015): 375–409. http://dx.doi.org/10.1163/2211-6427_015.

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As the world enters into a new century, Arctic countries, indigenous groups, non-state actors, and even non-Arctic nations such as China and India are intensifying their political and economic investments in the circumpolar region. The potential of an ice-free pole in the near future promises unprecedented opportunities of energy resources, trade routes, and mineral extraction. Nonetheless, few political leaders have or will ever travel to the far north. In a place so geographically remote from those who are taking interest, images and supportive textual discourse have become a medium for legi

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Remy, Denise, and R. ter Meulen. "French Pharmacists’ and Veterinarians’ Ethical Perspectives about the Delivery of Antibiotics for Animals: A Content Analysis of Practitioner Literature." Journal of Applied Animal Ethics Research 1, no. 1 (2019): 88–145. http://dx.doi.org/10.1163/25889567-12340007.

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Abstract Amongst the current, most important, international priorities in public health is the issue of bacterial resistance to antibiotics. This issue is due to the wide misuse and overuse of these drugs, both in human and veterinary medicine. Veterinarians fulfil a very important role as guardians of animal health and as public health actors; if they do not use antimicrobials judiciously, animal health and welfare as well as public health will be severely compromised. Therefore it is of particular importance to study the professional ethos of veterinarians as regards the delivery of antibiot

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Spivak, D. S., and S. V. Kliuchnyk. "Critical Analysis of the Development of the Design of Lattice Tube Concrete Bridges with a Ride on Top." Science and Transport Progress, no. 1(105) (March 26, 2024): 105–12. http://dx.doi.org/10.15802/stp2024/301524.

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Purpose. The paper aims to highlight and substantiate the need to find rational design schemes for lattice tube concrete bridges with a ride on top based on the analysis of recent research and regulatory documents. Methodology. The current scientific research is analyzed to determine the current state of development of pipe concrete lattice structures. Methods for improving structures are presented. Combinations of filling the grating elements with concrete, variants of cross-sections of the grating elements, their advantages and disadvantages are analyzed. The state of building codes of Ukrai

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Xing, Fei, Yi Ping Yao, Zhi Wen Jiang, and Bing Wang. "Fine-Grained Parallel and Distributed Spatial Stochastic Simulation of Biological Reactions." Advanced Materials Research 345 (September 2011): 104–12. http://dx.doi.org/10.4028/www.scientific.net/amr.345.104.

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To date, discrete event stochastic simulations of large scale biological reaction systems are extremely compute-intensive and time-consuming. Besides, it has been widely accepted that spatial factor plays a critical role in the dynamics of most biological reaction systems. The NSM (the Next Sub-Volume Method), a spatial variation of the Gillespie’s stochastic simulation algorithm (SSA), has been proposed for spatially stochastic simulation of those systems. While being able to explore high degree of parallelism in systems, NSM is inherently sequential, which still suffers from the problem of l

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Abdelateef Mostafa, M., Enas A. El-Hay, and Mahmoud M. ELkholy. "Recent Trends in Wind Energy Conversion System with Grid Integration Based on Soft Computing Methods: Comprehensive Review, Comparisons and Insights." Archives of Computational Methods in Engineering, November 8, 2022. http://dx.doi.org/10.1007/s11831-022-09842-4.

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AbstractWind energy is an effective and promising renewable energy source to produce electrical energy. Wind energy conversion systems (WECS) have been developing on a wide scale worldwide. The expansion of wind energy demand tends to produce high-quality output power in terms of grid integration. Due to the intermittent nature of wind energy, great challenges are found regarding WECS modeling, control, and grid integration. This paper introduces a comprehensive review of WECS and their grid-interface systems based on soft computing methods. To achieve this aim, more than 300 articles are orga

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Asim, Khawaja M., Danijel Schorlemmer, Sebastian Hainzl, et al. "Multi-Resolution Grids in Earthquake Forecasting: The Quadtree Approach." Bulletin of the Seismological Society of America, December 6, 2022. http://dx.doi.org/10.1785/0120220028.

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ABSTRACT The Collaboratory for the Study of Earthquake Predictability (CSEP) is an international effort to evaluate probabilistic earthquake forecasting models. CSEP provides the cyberinfrastructure and testing methods needed to evaluate earthquake forecasts. The most common way to represent a probabilistic earthquake forecast involves specifying the average rate of earthquakes within discrete spatial cells, subdivided into magnitude bins. Typically, the spatial component uses a single-resolution Cartesian grid with spatial cell dimensions of 0.1° × 0.1° in latitude and longitude, leading to 6

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Bose, Sanuja, David P. Stonko, Sharon C. Kiang, et al. "Validation of ICD-10 Codes to Distinguish Between Claudication and Chronic Limb-Threatening Ischemia in Patients Undergoing Peripheral Vascular Intervention Using Medicare-Matched Registry Data." Circulation: Cardiovascular Quality and Outcomes, May 29, 2025. https://doi.org/10.1161/circoutcomes.124.011467.

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BACKGROUND: The accuracy of contemporary administrative claims codes to discriminate between different phenotypes of peripheral artery disease is not well defined. We aimed to validate a predefined set of International Classification of Diseases, Tenth Revision , codes used to distinguish between claudication and chronic limb-threatening ischemia (CLTI) and to optimize their diagnostic accuracy using a supervised machine-learning approach. METHODS: We included all patients who underwent a peripheral vascular intervention for claudication or CLTI in the US Medicare-matched VQI-VISION (Vascular

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Kumawat, Ganesh Lal, Anuj Kumar Kansal, Naresh Kumar Maheshwari, and Avaneesh Sharma. "Computational Fluid Dynamics Simulation of Flow-Mixing and Heat Transfer in 4 × 4 Rod Bundle With a Twist-Vane Spacer Grid." Journal of Nuclear Engineering and Radiation Science 5, no. 4 (2019). http://dx.doi.org/10.1115/1.4042120.

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The clearance between fuel rods is maintained by spacer grid or helical wire wrap. Thermal-hydraulic characteristics inside fuel rod bundle are strongly influenced by the spacer grid geometry and the bundle pitch-to-diameter (P/D) ratio. This includes the maximum fuel temperature, critical heat flux, as well as pressure drop through the fuel bundle. An understanding of the detailed structure of flow mixing and heat transfer in a fuel rod bundle geometry is therefore an important aspect of reactor core design, both in terms of the reactor's safe and reliable operation, and with regard to optimu

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Ventura, Cristina, Giuseppe Marco Tina, Massimiliano Maurizio De Benedetti, Daniele Dugo, and Nabil Abouchabana. "Experimental Tests and Simulations About The Efficiency of Commercial Hybrid Inverters Operating at Variable Power Factor." Smart Grids and Sustainable Energy 9, no. 2 (2024). https://doi.org/10.1007/s40866-024-00217-1.

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AbstractThe need to ‘rethink’ the concept of Distribution, both at the planning and operational levels, arises from the emergence of the Distributed Generation paradigm, mostly installed in LV networks. The existing arrangements for the management, protection and control of distribution networks are typically inadequate for this ever-increasing presence of Distributed Generation. Consequently, national and international grid codes have been updated requiring distributed generators to be involved in grid control by supplying ancillary services, such as the voltage and frequency regulation. In t

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Anita Sondhi and Dr. Ravindra Kumar. "QR Code as the Delivery of agent to Schools." International Journal of Scientific Research in Science and Technology, February 9, 2022, 273–76. http://dx.doi.org/10.32628/ijsrst229144.

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Divider or magazine magazines are a method for conveying data on Schools grounds. In the conveyance of data, the magazine has been broadly spread in a few utilizations of Schools, iRan and GreenDoc. Be that as it may, this is as yet not ideal in light of the fact that the strategy utilized is as yet utilizing paper. And furthermore the absence of consciousness of understudies will peruse the data on the magazine. QR codes are a sort of two-layered grid code or scanner tag created by Denso Wave in 1994. With that, the type of data is decreased to a QR code that can store nitty gritty data showe

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Abdelhady, Mohamed, and David H. Wood. "Evaluating the Impact of Free-Stream Turbulence on Convective Cooling of Overhead Conductors Using Large Eddy Simulations." Journal of Energy Resources Technology 141, no. 6 (2019). http://dx.doi.org/10.1115/1.4042401.

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The international trend of using renewable energy sources for generating electricity is increasing, partly through harvesting energy from wind turbines. Increasing electric power transmission efficiency is achievable through using real-time weather data for power line rating, known as real-time thermal rating (RTTR), instead of using the worst case scenario weather data, known as static rating. RTTR is particularly important for wind turbine connections to the grid, as wind power output and overhead conductor rating both increase with increasing wind speed, which should significantly increase

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Payne, Robert. "Grid: On Being-as-Transmission and Normativity." M/C Journal 9, no. 1 (2006). http://dx.doi.org/10.5204/mcj.2587.

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   Images of grids are employed in a number of areas of contemporary critical and cultural theory. One usage features throughout the fields of gender and sexuality studies, especially as inspired by the work of Judith Butler. Following Foucault’s formulation that disciplinary power operates as a “grid of intelligibility of the social order” (93), Butler theorises that normative modes of gender and sexuality constitute a regulatory structure through which subjectivity is rendered intelligible or not. Being off the grid – beyond its normalising mechanism – fundamentally challen

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"Challenges of Connecting Distributed Generation Facilities to Grids in Russia: Analysis of Other Jurisdic-tion." Bulletin of the South Ural State University series "Power Engineering" 21, no. 1 (2021): 5–20. http://dx.doi.org/10.14529/power210101.

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The paper compares the connection of distributed generation facilities to grids rated at up to 35 kV in Russia and in Germany. Notably, whilst distributed generation (DG) is used prolifically in Russia, there is still no uniform terminology nor legal regulation with regard to connecting DG units to the existing distribution grids. The paper substantiates the need for better legal regulation of this matter in Russia; other jurisdictions, e.g., Germany, can provide a good reference. Thus, analysis of the German legislation shows that is has a complex hierarchical system of regulatory frameworks

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Juan, Portoviejo Brito, Icaza Alvarez Daniel, and Castro Samaniego Christian. "Modeling and Simulation of a Hybrid System Solar Panel and Wind Turbine in the Quingeo Heritage Center in Ecuador." International Journal of Electrical, Electronic and Communication Sciences 11.0, no. 6 (2018). https://doi.org/10.5281/zenodo.1317292.

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In this article, we present the modeling, simulations, and energy conversion analysis of the solar-wind system for the Quingeo Heritage Center in Ecuador. A numerical model was constructed based on the 19 equations, it was coded in MATLAB R2017a, and the results were compared with the experimental data of the site. The model is built with the purpose of using it as a computer development for the optimization of resources and designs of hybrid systems in the Parish of Quingeo and its surroundings. The model obtained a fairly similar pattern compared to the data and curves obtained in the field

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Liu, Chunying, Eric Freeman, Elizabeth C. Kent, et al. "Blending TAC and BUFR Marine in Situ Data for ICOADS Near-Real-Time Release 3.0.2." Journal of Atmospheric and Oceanic Technology, August 22, 2022. http://dx.doi.org/10.1175/jtech-d-21-0182.1.

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Abstract This paper describes the new International Comprehensive Ocean-Atmosphere Data Set (ICOADS) near-real-time (NRT) Release, (R3.0.2), with greatly enhanced completeness over the previous version (R3.0.1). R3.0.1 had been operationally produced monthly from January 2015 onward, with input data from the World Meteorological Organization (WMO) Global Telecommunication Systems (GTS) transmissions in the Traditional Alphanumeric Codes (TAC) format. Since the release of R3.0.1, however, many observing platforms have changed, or are in the process of transitioning, to the Binary Universal Form

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Indumathy, R. "NATURE INSPIRED ALGORITHMS TO SOLVE DNA FRAGMENT ASSEMBLY PROBLEM: A SURVEY." June 29, 2012. https://doi.org/10.5121/ijbb.2012.2205.

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International Journal on Bioinformatics & Biosciences (IJBB) Vol.2, No.2, June 2012 DOI : 10.5121/ijbb.2012.2205 45 NATURE INSPIRED ALGORITHMS TO SOLVE DNA FRAGMENT ASSEMBLY PROBLEM: A SURVEY Indumathy R 1 and Uma Maheswari S 2 1Research Scholar, 2Associate Professor Department of Electronics and Communication Engineering, Coimbatore Institute of Technology, Tamilnadu, India 1indumathy.rajagopal@gmail.com 2umamaheswari.cit@gmail.com ABSTRACT Evolutionary search algorithms are becoming an essential advantage in the algorithmic toolbox for solving multi-dimensional optimization problems in a

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Hunsinger, Jeremy. "Interzoning In after Zoning Out on Infrastructure." M/C Journal 14, no. 5 (2011). http://dx.doi.org/10.5204/mcj.425.

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This paper is about the relationships between infrastructural, interzonal spaces and the communities and individuals that interact with them. It attempts to describe the politics of their aesthetics and their legitimation as two aspects of the same process of semiological warfare and its governance. For example, think about a street-corner, preferably one in a big city. Consider the processes and operations that occur there, who creates them, legitimates them, and what they mean. For the sake of this paper, the road, the sidewalk, the streetlights with their cabling and electrical grid, the se

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McKenzie-Craig, Carolyn Jane. "Performa Punch: Subverting the Female Aggressor Trope." M/C Journal 23, no. 2 (2020). http://dx.doi.org/10.5204/mcj.1616.

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The bodies of disordered women … offer themselves as an aggressively graphic text for the interpreter—a text that insists, actually demands, that it be read as a cultural statement, a statement about gender. (Bordo, 94)Violence is transgressive in fundamental ways. It erases boundaries, and imposes agency over others, or groups of others. The assumed social stance is to disapprove, morally and ethically, as a ‘good’ and ‘moral’ female subject. My current research has made me question the simplicity of this approach, to interrogate how aggression socialises power and how resistance to structura

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Acland, Charles. "Matinees, Summers and Opening Weekends." M/C Journal 3, no. 1 (2000). http://dx.doi.org/10.5204/mcj.1824.

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Newspapers and the 7:15 Showing Cinemagoing involves planning. Even in the most impromptu instances, one has to consider meeting places, line-ups and competing responsibilities. One arranges child care, postpones household chores, or rushes to finish meals. One must organise transportation and think about routes, traffic, parking or public transit. And during the course of making plans for a trip to the cinema, whether alone or in the company of others, typically one turns to locate a recent newspaper. Consulting its printed page lets us ascertain locations, a selection of film titles and thei

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Crouch, David, and Katarina Damjanov. "Extra-Planetary Digital Cultures." M/C Journal 18, no. 5 (2015). http://dx.doi.org/10.5204/mcj.1020.

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Digital culture, as we know it, owes much to space exploration. The technological pursuit of outer space has fuelled innovations in signal processing and automated computing that have left an impact on the hardware and software that make our digital present possible. Developments in satellite technologies, for example, produced far-reaching improvements in digital image processing (Gonzalez and Woods) and the demands of the Apollo missions advanced applications of the integrated circuit – the predecessor to the microchip (Hall). All the inventive digital beginnings in space found their way bac

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