bluuebunny/crossref_metadata_2025_split huggingface dataset:
Des architectes urbanistes au cœur d’une lutte entre des écologies concurrentes. « Quartier libre des Lentillères » contre « écocité Jardin des maraîchers » à Dijon
Authors: Bouilhol Pierre 
Published: April 2023

À l’heure d’une intensification des controverses socio-environnementales autour de projets d’aménagement, une nouvelle forme de militantisme anticapitaliste émerge depuis des « zones à défendre » (ZAD). Ces mobilisations remettent en cause l’intérêt général promu en résistant contre de « grands projets inutiles et imposés ». À l’heure des dérèglements multiples, à la fois locaux et globaux, de plus en plus de conflits opposent des écologistes à d’autres écologistes. Cette enquête propose de cartographier l’histoire, les régimes narratifs et les effets d’une mobilisation socio-environnementale : celle du « quartier libre des Lentillères » en lutte contre la deuxième tranche du projet d’« écocité Jardin des maraîchers » à Dijon. Après avoir précisé les histoires à l’origine des représentations concurrentes de ce sol contesté, selon la perception qu’en ont les acteurs, l’article se concentre sur les régimes narratifs de la mobilisation ainsi que sur sa réception auprès des professionnels de l’urbain. Cette mobilisation peut être considérée comme une mise au travail vivante de la pensée écologique, un laboratoire de l’habiter qui trouble la pratique des architectes urbanistes, mais peut aussi représenter une opportunité originale pour réinterroger l’activité de projet à l’heure du nouveau régime climatique.
De l’activisme à la négociation urbaine. Dynamiques d’engagement politique et environnemental à la Floating University de Berlin
Authors: Apruzzese Antoine 
Published: April 2023

Le projet de la Floating University, développé en 2018 par le collectif Berlinois Raumlabor, est une expérience architecturale complexe et hybride pensée comme un laboratoire d’expérimentations collectives sur le rapport que nos sociétés urbaines entretiennent avec l’environnement. Elle vient s’ajouter à une dizaine d’années d’interventions urbaines et temporaires sur le site de l’ancien aéroport Tempelhof. Les projets de Raumlabor visent à mettre en place les conditions culturelles pour le développement d’une communauté locale partageant des valeurs sociales et environnementales communes, et en capacité d’agir sur ses propres conditions d’habiter la ville. L’évolution architecturale et programmatique du lieu témoigne des différentes dynamiques d’engagement politique de la part du collectif et de l’association qui reprend et fait vivre le projet à la suite de Raumlabor.
The Tri Suction Pile Caisson, a Noiseless Foundation for the US Offshore Wind Sector
Authors: ter Horst Erik , D'Aspremont Constance 
Published: April 2023

Abstract
A study has been taken on to confirm the technical feasibility of the design, fabrication, transport and installation of the Tri Suction Pile Caisson (TSPC). The TSPC is a wind turbine generator foundation that does not generate any underwater noise during installation, due to the silent suction installation process; thus, no schedule constraints due to noise level exceedance, seasonal-, or nighttime bans need to be taken into account, thereby de-risking the project. The philosophy behind the TSPC is that the Central Column is similar to a monopile, which allows fully automated fabrication at low cost, compared to the typically more complex nodes of the similarly noiseless suction bucket jacket.
The TSPC can be either installed by existing high-class Heavy Lift Vessels, or in split configuration by vessels with reduced offshore crane capacity, by lowering the Base to the seabed by a ballast-controlled methodology. The required crane capacity for this phase, as well as for the post-installation lifting operation of the Central Column is limited, allowing Heavy Lift Vessels with a relatively low crane capacity and thereby a reduction in the transport and installation cost is envisaged.
A design of the TSPC based on typical U.S. East Coast conditions is presented, which includes a load condition that accounts for the potential presence of hurricanes traveling North. The design of the TSPC foundation has been made for a 15 MW wind turbine. The presented design includes the Double Slip Joint, which allows breaking the foundation into two manageable components; this allows the Base to be floated out and towed to site.
Due to the absence of pile driving-induced accelerations, all the secondary steelwork can be pre-assembled onto the TSPC structure on the fabrication yard, reducing cost and risk. This also allows pre-installation of Nature Inclusive Design elements onto the TSPC Base, to improve the marine habitat; this will further enhance the environmentally friendly characteristics of the TSPC.
A SWOT analysis for the United States supply chain has been performed, highlighting the implications to the structural design and the Transport and Installation methodology.
Wandoo A – A Life Extension Case Study Implementing Reliability Methodologies
Authors: Kitson Michelle , Roberts Rachel , O'Brien Colin , Sheppard Robert , Moslehy Yashar 
Published: April 2023

Abstract
The Wandoo Oil Field is located about 75km northwest of Karratha, Western Australia. Wandoo A (WNA) is a normally unmanned monopod platform installed in 1993 with a 15-year design life. Demonstrating fitness for service of this facility through the end of field life posed unique technical challenges given its features, including grouted connections, Tuned Liquid Damper (TLD) and the prospect of Wave-in-Deck (WID) in higher return period environmental events.
This paper presents a life extension case study for this facility by exploring the overall life extension process and how that process is tailored to its unique structural aspects. In addition to evaluating the structure for metocean strength and fatigue loading, seismic and ship collision loading were also components of the assessment. Incorporating the current condition of the assets into the process, the probability of failure subject to the various environmental hazards was thoroughly studied to check conformance against industry acceptable limits using both design level and ultimate strength approaches.
Extensive reliability assessment is performed with consideration given to factors of uncertainty including material strength, structural system capacity, structural system redundancy, WID and Wave-in-Jacket (WIJ) loading, and soil capacity. Analytical refinement was devoted to both capacity (structural and soil behavior) and demand (metocean/seismic events and return periods) considerations to increase confidence in the results. Probability Density Functions (PDFs) for metocean loading and for resistance of the structure and foundation are calculated in order to determine the collapse frequency (probability of failure calculation) based on reliability methodologies considering both First Order Reliability Methods and Monte Carlo simulations.
Of particular focus for this work is supporting the ALARP (As Low As Reasonably Practicable) phase of the project based on the reliability outcomes. As with any ageing asset, there are components and systems that do not meet normal design allowable limits used for newer structures. This paper explores how these higher risk aspects of the facilities were studied so they may be addressed using an ALARP approach and how that process fits into the typical life extension process followed for WNA.
Recommendations for Design Basis Approach to Fire Protection and Safety Systems for US Offshore Wind Industry
Authors: Oliver Eric , Rudrapada Gnanesh , Sarada Shashikant 
Published: April 2023

Abstract
The US offshore wind (OW) energy industry with 42 MW current capacity is still in incipient development behind some regions in Europe and Asia. To reach the ambitious goal of 30 GW of installed offshore wind energy by 2030, the industry could benefit from a standard and streamlined framework for fire protection and safety system design. The American Clean Power Association's Offshore Compliance Recommended Practices (OCRP) was published in October 2022 providing a consensus-based framework and replacing a previous version from 2012. The framework provided in the updated OCRP includes new references for fire protection and safety design, including the National Fire Protection Association's NFPA 850 recommended practice and DNV-ST-0145 guidelines for passive fire protection. This paper discusses the design basis approach to the fire protection and safety system design and proposes a framework for design of safety systems such as fire detection, alarm, and notification system, helideck safety systems, and safe egress, with a focus on Offshore Substations (OSS).
This paper is written for developers; professionals in engineering, procurement, and construction (EPC); equipment vendors; and regulators and provides a best practice framework for fire protection and technical safety. It explains the fundamental conceptual frameworks for selecting, organizing, and understanding engineering design reference standards. It also lists and discusses the fire protection and safety systems and applicable design standards. This paper also provides lessons learned from project design experiences and identifies opportunities and risks for the burgeoning OW industry. Case studies included in this paper show examples of considerations made when selecting one design standard over another, the impact of non-compliance to US-based standards, and the importance of effective communication for stakeholder engagement.
Interim Results of the Propulsion Motors Over-Torque Data Acquisition Project Onboard United States Coast Guard Icebreaker MACKINAW
Authors: Brainard Benjamin C. , Iyerusalimskiy Aleksandr V. , Ferguson Ian C. , Foy Brandon J. , Talay James 
Published: April 2023

Abstract
The United States Coast Guard (USCG) is currently in the process of developing operational performance requirements for a future Great Lakes Icebreaker. Part of these efforts are revisiting the technical requirements for the propulsion diesel-electric system. Diesel-electric propulsion motors can experience substantial over-torque during severe ice-propeller interactions known as ice milling. The specified value of over-torque has often been selected arbitrarily and varies significantly for modern designs - typically from 120 to 175% of open water bollard torque. These torque requirements have significant impacts on the design of any icebreaker, as they directly affect vessel size, weight, icebreaking capability, power plant requirements, and cost. As such, it is essential to have an accurate and justified prediction of possible over-torque that an icebreaker may encounter in its operating environment. Specified over-torque values are often based on operator preferences or design idiosyncrasies rather than data. This paper describes the methodology, instrumentation, and interim results of the ongoing over-torque data acquisition project. Current efforts include reviews of multiple data sets from various machinery control systems from United States Coast Guard Cutter (USCGC) MACKINAW during the winters of 2021 and 2022. Data collection includes various settings of torque limits and various operational scenarios. Interim results indicate that when the vessel is operated in conditions of low to average severity, the probability of encountering ice milling and over-torque is nominal. Data collection will be continued beyond 2022. Statistics on actual ice torque values encountered in operation is limited. Described full-scale data will help to understand intensity of ice-propeller interaction and formulate feasible requirements for propulsion motors and control system especially for icebreakers fitted with azimuthal propulsors.
Challenges to Recover Subsea Umbilicals in Decommissioning Projects
Authors: Santana Andre Luiz Bevilaqua , Semedo Edmila De Souza , Castilho Jose Maria , Fernandes Paulo Tavares , Pinto Wendell Dias , Castro Luis Carlos Eduardo , Da Silva William Albuquerque 
Published: April 2023

Abstract
The collection of flexible pipelines and umbilicals in Petrobras covers a considerably high volume of operations. In particular, the growing demand for decommissioning, combined with the Diverless Synergy initiative, has boosted mobilization for the advancement and optimization of collection operations. Result of the integration between the different company sectors and assets involved, through the availability of resources, the process of development and evolution of tools that provide cost reduction and operational safety is presented in this article as we can see in the Motivation Plan (Fig.1)
Comparison Between Different Types of Suction Pile
Authors: El-Tantawi Wael AbdelSattar 
Published: April 2023

Abstract
The utilization of suction pile as a foundation for subsea structures is a modern alternative to the traditional foundation types. Suction pile foundation is widely used nowadays due to the benefits and advantages relevant to the design and installation of such a foundation.
Throughout this paper, A review of three types of load-bearing suction pile foundation is introduced based on a cost efficiency as well as design and construction aspects study. The aim of this review is to explore and critically assess the pros and cons of each type of the studied types to outline a guidance or a selection criterion for the different circumstances.
The approach adopted for the achievement of the above objective is based on a numerical analysis of the suction pile foundation types under certain loading combination, in which, both geotechnical and structural aspects are fulfilled to reach a sound design and optimum dimensions of the three said suction pile foundation types satisfying a prefdefined acceptance criterion. The resulted design of the three types is then used in a cost-based comparison to conclude the most cost-effective type, in addition to a critical assessment and review of the suction pile foundation design and construction challenges to figure out the pros and cons of each type.
The said comparison has concluded that the single pile should be the basic and the most preferable choice. This is due to its’ high direct and indirect cost efficiency and the simplicity and easiness of fabrication and installation. Double-piled type has also shown positive outcomes with regard the cost efficiency as well as the construction performance, which raises a question mark on its’ rare use in the industry. Four-piled suction pile foundation type, and despite being frequently used in the industry, has shown a negative cost efficiency along with high construction precautions. The review has shown that the four-piled type foundation is advantageous only when needed to support an extra-size structure with large footprint area or when used in a highly sloped seabed surface to get the benefit from its’ high levelling capability.
Digital Twin Provides Virtual Multiphase Flow Metering and Leak Detection to Deepwater Operations for Operational Decision Making on Liwan Field
Authors: Zhou Ming , Li Tony , Espeland Morten , Van Wolfswinkel Onno , Havre Kjetil 
Published: April 2023

Abstract
This paper presents lessons learned over eight years of using the first digital twin in the South China Sea by Cenovus Energy and China National Oil Company (CNOOC) on the Liwan Field. The digital twin provides a collaboration platform for integrated operations and is based on dynamic multi-phase flow simulation models for wells, flowlines and slug catchers, coupled to live field measurements.
One of the main objectives of the digital twin is to provide continuous real-time virtual instrumentation, as well as aggregated information related to flow assurance and integrity management with a novel multidimensional model-based leak detection workflow. The digital twin workflows enable operators to better prepare and respond to planned and unplanned events in the field and to analyze and optimize performance of the field, in combination with a data analytics tool.
Subsea wet gas flow meters (WGFM) in the field initially provided flow rate information to deep water operations in line with the operational strategy. After one year in production, a reduction in WGFM performance was observed. A mitigation strategy was developed to use the digital twin flow rate calculations combined with the remaining WGFMs for improved operational decision making.
Longest Slim Hole ERD Wells Campaign with Limited Entry Liner Using Water-Based Mud In Onshore Abu Dhabi
Authors: Varma Esha Narendra , Ditzler Theodore Jay , Mwansa Peter Levison , Husien Mohammad , Bin Bahrom Abdul Raman , Saragi Raymond , BinSumaida Ali Sulaiman Ahmed , Al Samahi Musabbeh Khamis , Al Shamsi Juma Sulaiman , Alshaigy Ahmad Othman , Gaurav Anchit , Abdelhalim Khaled 
Published: April 2023

Abstract
Extended reach drilling (ERD) can facilitate the development of untapped resources, reduce greenhouse gas emissions, surface congestion, and drilling costs. This ERD project with lower completion was started with an aim to lower well cost indicators including $/ft and $/bbl. Therefore, the challenge was to drill Slimhole ERD (6-1/8″ lateral) wells with water-based mud (WBM). WBM is more cost-effective, environmentally friendly, and less damaging to the reservoir than OBM (oil-based mud). The use of WBM instead of OBM can save $2MM per well. The major challenges in drilling Slimhole (6-1/8″ size) ERD well with lateral le include higher torque and failure to deploy lower completion due to high friction factors.
The first pilot well was planned with a liner-less design considering the low friction factors required to drill 15,000’ of 6-1/8″ lateral hole and run the lower completion. The second pilot well was targeting a deeper and tighter reservoir zone with higher downhole temperatures. This involved drilling 12-1/4″ intermediate hole to the landing point with larger 5-1/2″ drill pipe. It enabled a push-pipe technique for drilling the lateral hole with improved weight transfer through the curved profile. The 6-1/8″ lateral hole was drilled with 4″ high-torque drill pipe, tandem high-flow circulating subs, and specially formulated drilling fluid lubricant. A conventional OBM system provides sufficient lubricity to reduce friction factors as low as 0.10. In this application, a low cost WBM system was made feasible by introducing stable high-temperature lubricant and unique hole cleaning practices.
Following this successful achievement, the 5-year business plan has been revised to include 63 similar wells with a projected total savings of ~ $250MM.
The Slimhole ERD project has demonstrated substantial value with a 35% reduction in CAPEX. The delivery of these two Slimhole ERD wells overturned conventional drilling and completion practices.
The implemented project resulted in saving up to 35% of the well cost and saved 20 days per well compared to a conventional ERD well with 8-1/2″ hole and OBM. These two Slimhole ERD (15,000’ lateral) wells were drilled with a challenging Directional Difficulty Index (DDI) of 7.2. The wells were both completed successfully by running the 4-1/2″ lower completion to reach the total depth.
An Efficient Time Domain Fatigue Analysis Method for Floating Wind Turbine Hull Structure
Authors: Xu Qi , Ling Qi , Kyriakides Andrew 
Published: April 2023

Abstract
An efficient hybrid method of calculating hull structure stress response in time domain for fatigue analysis purpose is developed. The platform’s motion response and turbine/tower dynamic structural response are solved in time domain. Hull structure stresses due to the interface load at tower bottom and hull inertia load are calculated using stress transfer functions for unit loads at tower bottom and unit accelerations on the hull mass. Wave pressure RAO by unit amplitude wave is calculated using a wave radiation/diffraction analysis program, and stress RAO by wave pressure RAO is then calculated and converted into time domain using a conventional frequency domain to time domain conversion. Principal stress time series is then calculated from the combined total component stress for Rainflow counting of stress cycles.
Advances in ROV & AUV Capabilities and Tooling for Energy Applications
Authors: Abu Zeid Hosam , Elshahawi Hani 
Published: April 2023

Abstract
Deepwater oil and gas operations often deal with harsh environmental conditions which pose numerous challenges for the design and deployment of in-well, topside, and subsea systems and stretch the performance envelopes of the associated equipment. High pressure, temperature, and well flows require specialized downhole and subsea equipment with robust and resilient performance specifications. Punishing surface and subsea conditions such as wind, wave, and loop currents can make it difficult to locate and maintain subsea equipment with typhoon and hurricane seasons in various parts of the world generating up to100 mph winds and 12-foot storm surges which can force facility evacuations. Because of all these factors, remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs) have become critical for ensuring the safety and integrity of deepwater operations. ROVs are typically tethered to a surface vessel by a cable and are controlled remotely by a human operator, while AUVs are self-sufficient and can operate independently without a human operator. These specialized underwater robots are used for a variety of critical under-water applications, which range from monitoring and inspection to rescue and repair.
This paper discusses recent advancements in the use of ROVs and AUVs in deepwater operations, specifically focusing on design considerations as defined by the interplay between water depth, buoyancy, propulsion and stabilization requirements during service operations. It also covers auxiliary tooling systems - the various tooling kits used for inspection, repair, and maintenance missions, all of which are fundamental to maintaining the safety and reliability of subsea systems. Finally, the paper explores innovations in the range of capabilities for special missions, deployment techniques, power sourcing options, the effect of different communication systems on the degree of autonomy and the range of underwater vehicle navigation systems.