bluuebunny/crossref_metadata_2025 huggingface dataset:
Interrupt Criteria for DP-Operated Facilities
Authors: Kaasen Karl Erik , Ludvigsen Halgeir , Bjørheim Lars Geir
Published: April 2023

Incidents of loss of position for semi-sumersible vessels have been found to be caused by wave-drift loads. For a semi, the wave-drift loads can be significantly larger than predicted by conventional methods based on potential theory, due to viscous loads on the columns. In addition, the wave-drift load may increase due to the presence of current.

A DP system will give much stronger damping than a mooring system of similar restoring stiffness. This will alter the characteristic of the vessel's low frequency motion, which will tend to be exponentially distributed. A consequence of this is that the extreme wave-driven vessel excursions will be large in comparison with the average motion.

A marine operation can only be carried out provided the critical variables of response stay below given limits with a sufficiently large probability. To estimate probabilities of limit non-exceedance, simulation of 100 hours of vessel motion is carried out for a number of sea states. Weibull distributions are then fitted to the response data and further used for extreme value calculation. Although the processes of wave frequency (1st order, WF) motion and the low frequency (2nd-order, LF) wave-induced motion are totally different, Weibull distributions could successfully be fitted to the total (LF+WF) motion. The fitted Weibull distributions were close to the exponential distribution, which they should for a strongly damped vessel.

From the Weibull distributions quantiles of vessel motion could be calculated for given probabilities of limit non-exceedance. Examples of how this information can be used in interrupt criteria for marine operations are given.
Applications of Adaptive Sampling Strategies of Autonomous Vehicles, Drifters, Floats, and HF-Radar, to Improve Loop Current System Dynamics Forecasts in the Deepwater Gulf of Mexico
Authors: DiMarco Steven Francis , Glenn Scott M , Jaimes de la Cruz Benjamin , Jiménez Rosalinda Monreal , Knap Anthony Hayden , Liu Yonggang , Magnell Bruce , Mahmud Sakib , Miles Travis N , Pallas-Sanz Enric , Ramos Rafael , Salas de León David Alberto , Shay Lynn Keith , Smith Michael , Tenreiro Miguel , Weisberg Robert H
Published: April 2023

The Gulf of Mexico holds vital natural, commercial, and societal resources. A diverse array of stakeholders (which includes the offshore energy sector, climate scientists, living resources managers, recreational and commercial fishing industry, tourism, navigation, homeland security, the National Weather Service, oil spill, tropical weather forecasters) rely on accurate and timely prediction of the deepwater dynamics to perform safe operations and to understand the complex interactions of the earth climate and weather system. A strategy to improve predictive skill of numerical ocean circulation models of the deepwater Gulf of Mexico using adaptive sampling of in situ oceanographic observational platforms, which includes autonomous vehicles, buoyancy gliders, floats, drifters, and high-frequency radar is described. Profiling platforms, i.e., gliders and floats, will collect co-located estimates of temperature, salinity, and current velocity, to provide estimates of the total kinematic vertical water-column structure. The observations will be made available to numerical circulation modelers for injection into data assimilation routines and for model skill assessment, validation, and data denial experiments. The activities, to take place in 2023 to 2027, are focused on the Mini Adaptive Sampling Test Run, i.e., MASTR, (summer 2023) and the Grand Adaptive Sampling Experiment, GrASE (2024-2025).
How Underwater Drones Can Promote the Environmental Sustainability of Offshore Natural Resources Exploitation
Authors: Massari Giovanni , Marras Cristina , Cavallini Francesco
Published: April 2023

As the world shifts at fast pace towards new energy scenarios, the offshore environment is attracting extensive new project developments that pose new challenges in the management and the protection of marine ecosystems.

In parallel, the recent geopolitical situation has exposed the compelling need to guarantee the integrity of subsea critical energy infrastructure calling for new paradigms to efficiently perform complex periodic inspections and intervention tasks. All these factors are driving a rapid evolution of subsea robotics, enabled by the advancement of emerging technologies, such as artificial intelligence, which have now reached a sufficient maturity level for industrial deployment.

Within these innovation scenarios, underwater intervention / inspection drones (UIDs) are rising to offer the most promising answers to the needs of the offshore industry. This new family of underwater robots presenting AUV/ROV hybrid capabilities, enable new attractive operational paradigms that are already being positively recognized by the offshore industry. The use of UIDs, particularly when permanently integrated into fields (topside or as subsea resident) could greatly contribute to reducing the costs and risks normally associated with subsea inspection activities.

The scope of this paper is to offer an overview of UIDs and provide the necessary elements to take full advantage of this technology, supporting the environmental sustainability of future offshore projects and activities. The investigation provided, explores conventional applications for oil and gas and then extends to future new energies, deep-sea mining and CO2 capture and storage projects. The analysis starts from UIDs state-of-the-art technology and moves to explore possible application scenarios in the attempt to anticipate possible solutions and related technical gaps.
SIIBED: Soil Response of Dense Sand Under Rapid Inclined Loading
Authors: Phillips Ryan , Chen Jin , Thompson Shawn Trevor , Dayarathne Rajith Sudilan , Piercey Gerry , Barrett John
Published: April 2023

The objective of this paper is document numerical and physical modelling carried out under the SIIBED program in order to develop, calibrate and validate a design tool for assessment of risk to subsea infrastructure due to ice keel interaction with pipelines, flexible flowlines, and electrical cables. Soil response is a key factor in the complex interaction between surface-laid flowlines, iceberg keels, and the seabed. In this study, centrifuge model tests and accompanying large-deformation finite element analyses were performed to investigate the soil behavior under various water depths and pipe–soil interaction rates.

A series of centrifuge tests were completed using a scaled model of a 0.324 m diameter pipe in dense silica sand with a viscous pore fluid. The model pipe was pushed into the model seabed at a 60° penetration angle, at various penetration rates and water depths. The prototype-scale pipe–soil interaction problem was modeled using the Coupled Eulerian–Lagrangian method. Effective stress based dense sand constitutive behaviors were simulated using a modified Mohr-Coulomb model.

The pipe–soil interaction was tested under backpressure and with loading speeds comparable to mean iceberg drift speeds. A significant increase in soil resistance was observed between slow and rapid penetration tests and between the drained and undrained CEL models, indicating that penetration rate and drainage condition can greatly affect soil resistance. Furthermore, a partially drained CEL model was developed to illustrate the connection between penetration rate and drainage condition qualitatively, and how they affect the soil resistance. Meanwhile, the soil response was not sensitive to the water depths (or backpressures) in the centrifuge tests, while a high sensitivity was shown in the undrained CEL model. Potential reasons are explored.
CPT-Based Geotechnical Characterization of Foundation Zone Sediments at Atlantic Shores Offshore Wind Farm Development
Authors: Trandafir Aurelian C. , Adhikari Sudarshan , Peralta Proserpine , Broughton Aaron , (Dow) Fraser Jack , Hargrave Deanne
Published: April 2023

This study presents site-specific CPT-based correlation relationships for preconsolidation pressure, undrained shear strength, relative density and effective friction angle, developed for geotechnical characterization of foundation zone sediments at the Atlantic Shores offshore wind farm development. Results of laboratory geotechnical tests on samples from 49 soil borings performed at the Lease Area were correlated with corresponding measured cone resistance values from companion seabed or downhole CPTs. Ranges of overconsolidation ratios estimated using CPT-derived preconsolidation pressures from site-specific correlation relationships are in good agreement with overconsolidation ratios derived from laboratory measured preconsolidation pressures for various cohesive soil units. Interpreted ranges of cone resistance factors (i.e., Nkt) required in CPT-based undrained shear strength evaluation for cohesive soil units are significantly wider compared to the typical range of 15 to 20 representative for Gulf of Mexico clay sediments, as a result of large variability in soil plasticity as well as intermixed nature of the soils. Representative ranges of relative density and effective friction angle obtained from CPT data using site-specific correlation relationships, developed for the cohesionless soils at the Lease Area, are consistent with ranges of laboratory measured values.
Using Geophysics and Geotechnics to Maximize the Building of a Paleolandscape Reconstruction for Both an Archaeological and Geological History
Authors: Swanson Eric , Scherschel Craig , Fraser Jack , Puckett Neil , Joy Shawn , Blacker Kieran
Published: April 2023

The purpose of this paper is to present the refined and novel components that comprise a methodological proposal of the best practice for the larger paleolandscape reconstruction process in offshore wind development during Site Characterization. To accomplish this goal, several methods were used to bring subject matter experts together to discuss the needs and objectives relative to regulatory compliance, cultural interest, and engineering design in a multi-phase programmatic and survey process.

The expansive results from this modeling approach have allowed Qualified Marine Archaeologists (QMAs) to develop, in collaboration with geologists and engineers, the paleolandscape ground model ahead of typical developments by several months. The produced data innovatively multiplied available metrics, allowing adjustment of the regional geologic timeline to date marine Transgressive Channel Groups (TCGs) in the area and allowed better sequencing of the late Pleistocene and corrected some gaps in the region's depositional sequence model. With the resulting ground model, archaeologists, geologists, and engineers improved comprehensive qualitative analyses that can assist with understanding the impacts that anthropogenic activities have in the region.

The novel and additive information that this research offers is multi-fold. The methods employed here can aid in reducing challenges and delays associated with traditional non-multi-phase approaches when adopted by other developers or researchers in the offshore space. The efficiency-oriented outcome of adopting this method can reduce larger systematic problems caused by a lack of industry coordination practices in reporting to various engineering and regulatory bodies. They also isolate key features and processes that happen very early on in the process and maximize efficiency by gathering data needed many months to years later in the process. Another additive benefit was the approach of gathering data in the least intrusive and destructive way possible to maximize the knowledge that development and archaeological groups bring to the table when having conversations with consulting parties and government stakeholders. The novelty of this process has expanded synthesis in a way that starts the process early enough that the subject matter experts (SMEs) can develop a robust working ground model while considering multiple components at the same time, rather than teams working in a silo, uninformed of each other's work. The use of this process can grow the project methodology and industry best practice for multiple developers and government entities into the future.
Assessing Small-Strain Shear Modulus Based On In Situ Seismic Measurements in Bay of Campeche Sand
Authors: Taboada Victor Manuel , Cao Shuang Cindy , Cruz roque Diego , Barrera Nabor Procoro
Published: April 2023

A database with in situ measurements of shear wave velocity (VS), cone tip resistance (qc), and basic soil properties of sand has been established from fifteen offshore geotechnical investigations performed in the Bay of Campeche. VS values were obtained from P-S logging. The database was tailored to develop empirical correlations for small-strain shear modulus (Gmax) based on qc (or relative density), void ratio, and effective stress. Three empirical correlations were developed to determine Gmax based on: 1) void ratio, effective vertical stress, and coefficient of lateral earth pressure at rest; 2) effective vertical stress and relative density determined from CPT data; and 3) effective vertical stress and cone tip resistance. To evaluate the accuracy of the correlations, a comparison was made between VS computed from the three empirical correlations and in situ VS measurements at an independent site. The predictions of VS fall in a rather narrow band, 15 % lower and higher than the in situ VS measurement, which supports the conclusion that these equations provide a useful approach to estimating VS or Gmax for use in ground response analyses or offshore wind farm foundation design at sites where time constraints and finite resources prevent the feasibility of making in situ VS measurements.
Quantitative Risk Assessment of CO2 & H2 Offshore Pipelines - Advancing On Modelling Subsea Accidental Releases
Authors: Mercuri Andrea , Blasioli Giuseppe , Mauge Rudy , Busini Valentina , Fehervari Mauro , Aloigi Elvira , Arcangeletti Giorgio , Branduardi Luca
Published: April 2023

The assessment of risks for human health and environment is a crucial step of the design of subsea pipeline systems. Well-recognized standards, such as DNV-RP-F107, recommend carrying out periodic risk assessment throughout the whole life cycle of a subsea pipeline system. The purpose of this paper is to present the upgrade of a lean and proprietary tool to assess the consequences of CO2 and H2 releases from subsea pipelines whenever a Quantitative Risk Assessment (QRA) is required.

To quantify the risk for people and the environment involved in an accidental loss of containment of CO2 or H2 sealines, the physical effects of subsea releases need to be evaluated. The mathematical model described in this paper is based on state-of-the-art integral models developed for subsea releases. It models subsea plumes or subsea gas blowout considering the effects of sea current, sea salinity, sea temperature as well as the effects of impurities in the released stream. The model was validated through a comparison with a detailed Computational Fluid Dynamic (CFD) simulation and case studies available in literature.

At present, the assessment of subsea CO2 and H2 releases, for QRA purposes, is performed either by very simplified and not validated approaches, which can lead to an overestimation of the consequences, or by complex CFD tools which require specific skills, high computational costs, and long duration of analysis often not in compliance with tight project schedules. The results of this paper show a sufficient level of accuracy of the in-house integral model with respect to other well-recognized integral models in the estimation of underwater plume behaviour, bubble zone extension at the sea surface, void fraction, and mean plume speed. Therefore, it can provide a suitable set of input data for simulation of atmospheric dispersion of CO2 and H2. The comparison of the results, carried out by means of a CFD tool on a set of case studies, shows a good agreement of the main predictive parameters.

The model described is a suitable tool for consequences assessment in QRA studies for CO2 and H2 offshore pipeline projects concurring at the Net Zero objective, contributing to understand release impacts on safety and environment.
A Grand Banks Gas Pipeline; Opportunities and Challenges
Authors: Abdi Majid , Paulin Mike , King Tony , Fowlow Chad , Robbins David
Published: April 2023

This paper presents opportunities and challenges associated with a natural gas pipeline from offshore to a proposed LNG facility onshore/nearshore Newfoundland. Pipelines offshore Newfoundland to landfall have been studied for almost four decades but none have been constructed to date. Challenges include design methodology, protection from icebergs and trenching technology to afford that protection.

Evaluation of icebergs gouging the seabed and the impact on such a pipeline are presented and evaluated. Potential pipeline routing has been assessed to minimize risk of direct contact from a gouging iceberg keel. Risks to the pipeline may come from direct contact or through subgouge deformation beneath the keel. Risk was evaluated using an iceberg subsea contact model, updated to reflect the current iceberg regime, developed as part of an ongoing project titled "Subsea Ice Interaction Barrier to Energy Development (SIIBED)".

The paper also touches on aspects of a gas gathering system and regulatory considerations.
Development Plan Optimization and Uncertainty Study in a Major Deepwater Field in the US Gulf of Mexico
Authors: Rezaveisi Mohsen , Campbell Jennifer L , Wigley Paula L , Foster Tyler M , Peck Doug G
Published: April 2023

This paper describes the development plan optimization and probabilistic uncertainty study using Latin Hypercube Experimental design constrained to production performance in Lower Miocene (LM) reservoirs of the Shenzi Field in deepwater Gulf of Mexico (DW GOM). The purpose of the development plan optimization was to identify, rank, and characterize future development opportunities i.e. infills and injectors in the LM reservoirs to arrest the field decline. The study uses history matched dynamic simulation models.

Uncertainty parameters were identified and ranked through single variate sensitivity analysis with consideration of impact on history match quality. Top ranking uncertainty parameters were then characterized using probability distribution functions. Latin Hypercube Experimental design was then used to generate vectors of uncertainty parameters to be used in running many simulation cases. The simulation results from experimental design were filtered based on history match quality to 200 cases, a more manageable number for visualization and further simulation study. The 200 cases were then used to identify development opportunities and characterize their resource range.

Identification and proper characterization of uncertainty parameters were essential to attain reliable estimates of resource range and opportunity ranking, and for gaining insights into the downside risks of each development opportunity. This is especially the case for scenario-based uncertainty parameters with discrete distributions e.g., geologic scenarios. Application of simple data analytics techniques and powerful visualization tools was important in thoroughly analyzing the results of many simulation cases, understanding key uncertainty parameters and interdependencies for each development opportunity.

For most opportunities the incremental Estimated Ultimate Recoveries (EURs) calculated from the reference case model were optimistic compared to the P50 incremental EUR from the uncertainty study, highlighting the risks involved in making development decisions based on only reference case model results. A two well development concept with the minimum downside resource risk was identified. This was the case because the incremental EUR from the two wells was strongly correlated to a key uncertainty parameter but with opposite signs, thus reducing the downside resource risk.

Development plan optimization and ranking of development opportunities were performed using hundreds of history-matched simulation cases to properly capture the subsurface uncertainties in the estimated resource range for each opportunity. This methodology resulted in identifying development concepts with minimum low case resource risk and largest mid case resource.
Evaluation of Loop Current/Loop Current Eddy Fronts to Guide Offshore Oil & Gas Operations
Authors: Storie Jill , Ramos Rafael , Leber Michael , Nowak Heather , Young Michelle , Magnell Bruce
Published: April 2023

The unique circulation characteristics of the Gulf of Mexico (GOM) pose a significant threat to the safety of offshore oil and gas operations pertaining to installation of new production systems, drilling, and maintenance of existing offshore infrastructure. Operators in the area rely on realistic estimates of the location of the sharp fronts (regions of high horizontal shear) characteristic of the warm-core Loop Current (LC) and Loop Current Eddies (LCEs) and smaller cold core cyclonic eddies (CEs) to estimate working windows. However, locating these features is not a trivial undertaking because it requires review and analysis of multiple observational and model data sources. In this paper, we describe the frontal analysis (FA) methodology used to define such features. This technique has been accepted by industry as the best representation of the continuous front that delineates the most distinct current gradients defining the sharp outside edge of the LC/LCEs.

Definition of LC/LCE features is accomplished by defining the position and extent of the associated front, defined as the 1.5 knot current threshold. This involves performing an analysis of satellite imagery (snapshots and composites) and satellite-derived products (altimetry and geostrophic velocities), in-situ measurements (i.e., public and proprietary drifting buoys, rig-mounted ADCPs, vessel-mounted ADCP transects, etc.), and previous feature location/progression analyses, all weighted appropriately. The resulting front is then used to map these features and provide actionable information regarding their surface current velocities, migration speed and direction, angular rotation, and axis orientation.

Systematic analysis of the behavior of the LC system since 1984 has resulted in a unique oceanographic dataset comprising the location and evolution of LCEs. By incorporating frequent deployment of aircraft-deployed, satellite-tracked, drogued drifting buoys and the analysis of their track data, the FA provides the most accurate and extensive near-real-time information available regarding the location and intensity of currents affecting offshore operations. WHG’s FA product is commonly accepted throughout the industry and within the scientific community as the closest to ground truth for the placement of the major oceanographic features in the region. Understanding the details of this methodology will provide the basis for comparison of observations with new numerical modeling efforts (under development as part of the NASEM UGOS program) to effectively assess the accuracy of nowcast results and will eventually lead to better model forecasts for the benefit of various stakeholders.
All-Optical Subsea Sensing and Communications
Authors: Wilson Glenn , Uribe Mauricio , Moe Sigurd , Ellmauthaler Andreas , Suh Kwang , Jaaskelainen Mikko , Bush Jeff , Dupree James
Published: April 2023

Subsea control systems utilize electric and/or optical communication channels within subsea optical distribution systems for redundant, duplex telemetry between topside facilities and subsea control systems. Downhole fiber optic sensing (DFOS) systems utilize the same subsea optical distribution systems for establishing transmission paths between the same topside facilities and downhole sensing fibers. To date, subsea fiber optic control and sensing systems have been operated on independent subsea optical distribution systems. This redundancy introduces complexity and cost into the overall subsea optical distribution system required for subsea developments. We describe the systems that combine fiber optic communications for subsea control systems and downhole fiber optic sensing systems into the same subsea optical distribution system. This enables simultaneous operation of communications between the topsides and subsea control module, and the topside interrogation of multiple downhole fiber optic sensors while preserving dry-tree equivalent sensing performance.
Solar Energy Storage by Fuel Cell Technology at Abomey-Calavi (Benin)
Authors: TOWANOU Odilon Joseph , Donnou Hagninou Elagnon Venance , N’Gobi Gabin Koto , Leode Augustin Enonsi , Kounouh´ewa Basile
Published: April 2023

West Africa has a great amount of sunshine power, varying between 5 kWh.m^{-2}.day^{-1} and 7 kWh.m^{-2}.day^{-1}. This power constitutes high energy source in the region. However, several locations in that area have no access to energy because of the lack of suitable technology and projects exploiting the source. The fundamental problem related to sun power or to renewable energies in general is the lack of efficient technology for energy storage. Batteries are generally used for this storage, but once charged, the excess of the energy from the solar photovoltaic panels (PV) is lost. Therefore, it is very important to find a system to recover the excess in order to optimize its use. In this context, hydrogen is considered a very promising candidate to fulfill this function and could become a highly developed energy vector in the future. The very numerous works undertaken over the past decade for the production of electricity by hydrogen fuel cells bear witness to this. The objective of this study is to test a more reliable solar energy storage system by using fuel cell technology. To achieve this, three steps have been necessary: (i) make an electrolyser using materials, (ii) produce hydrogen using a system of PV panels and (iii) convert the hydrogen produced into electricity through a fuel cell. The results obtained indicate a production of 0.020 m^3 of hydrogen after 150 min with a yield of 85.86%. The production of electricity by a 2 V fuel cell gives an efficiency of 0.0042%. Even if this value is low, a part of the lost energy has been recovered. In view of these results, the improvement of the device for converting chemical energy into electricity deserves to be deeply explored in West Africa.
1420 MHZ RADYO TELESKOP UYGULAMALARI İÇİN MİKROŞERİT BASAMAK EMPEDANS REZONATÖRLÜ BANT GEÇİREN FİLTRE TASARIMI
Authors: ŞENEL Bilge
Published: April 2023

Radyo teleskoplar, gökbilimcilere, görsel veya optik bölgenin çok ötesine uzanan erişilebilir elektromanyetik spektrumun tamamında gözlem yapma imkânı sunarlar. Her frekans aralığı kendi içgörülerini sağlar ve genellikle kendi teleskop ve dedektör çeşitlerini gerektirir. Radyo astronomlar, 13 MHz ile 2000 GHz aralığında frekanslarda enerji yayan veya emen nesneleri incelerler ve atmosferin şeffaf olduğu her frekans değerinde çalışmalar yapılır. 1420 MHz radyo astronomik ölçümlerin yapıldığı frekans değerlerinden birisidir. Yaklaşık 1420 MHz'de 21 cm'lik bir dalga boyuna sahip olan nötr hidrojen (HI) emisyonları, galaksideki uzak yerlerden ve yönlerden kaynaklanır, yıldızlararası bulutlardan geçer ve Doppler kaydırılmış frekanslarda yer tabanlı radyo teleskop gözlemlerinde ortaya çıkar. HI emisyonlarından yapılan haritalar, Samanyolu Galaksisi’nin sarmal yapısını ortaya çıkarır. Ölçümler radyo teleskop sistemlerinin RF bloğu ile gerçekleştirilir. Bant geçiren filtreler bu RF bloğun çok önemli bileşenlerindendir. Bu çalışmada 1420 MHz radyo teleskop uygulamaları için Basamak Empedans Rezonatör yapısı kullanılarak mikroşerit bant geçiren filtre tasarımı yapılmıştır. Tasarımda basamak empedans rezonatörü ile paralel kuplajlı hat yapısı beraber kullanılmıştır. Filtre Keysight ADS simülatörü ile tasarlanmış ve istenen tasarım kriterlerine ulaşmak için paralel kuplajlı hat uzunlukları optimize edilmiştir. Yapılan simülasyonlar neticesinde tasarlanan filtrenin 3dB bant genişliği 130 MHz, ekleme kaybı (S_{21}) -0.152 dB, giriş yansıma katsayısı (S_{11}) -38.018 dB olarak bulunmuştur. Çalışmada tasarlanan filtre 1420 MHZ radyo teleskoplarının RF alıcı bloğunda kullanılacak kriterlere sahiptir. Ayrıca filtre eğitim ve deney amaçlı radyo teleskop sistemlerinde kullanılabilecektir.
DESIGN AND MANUFACTURING OF A TWO-STAGE REDUCTION GEARBOX WITH 3D PRINTERS
Authors: KARAKUŞ Serpil
Published: April 2023

ABSTRACT

3D printers, which have been used in recent years, enable the conversion of a digital model into a physical 3D object by placing the filament material layer by layer and can help a wide variety of industries. Digital models can be created using software such as Solidworks and Catia or data created by a 3D scanner.

This study designed all parts of a two-stage reducer gearbox consisting of spur and helical gear pairs. The torques are calculated according to the input power. Shafts that can transmit torques are designed.

On the other hand, gear wheels were calculated according to the total reduction ratio and were designed to transmit torques. CAD software (Solidworks) designed the gearbox parts, assembled them, and simulated them. Thus a digital model has been created. CAD models were transferred to the 3D printer. The slicing was done precisely using Cura software,

On the other hand, the Marlin software reads the G codes created with Cura software sent from the computer. PLA (Polylactic Acid) was used as the filament material. The manufactured gearbox worked adequately, and the number of revolutions was reduced to 40 rpm from 800 rpm.

Keywords: Gearbox, Gears, 3D printing, CAD, Additive manufacturing
FROM DESIGN CONCEPT TO PRODUCTION: USING GENERATIVE DESIGN OUTPUT AS DESIGN INSPIRATION
Authors: KOCAMAN Utku , TOĞAY Abdullah
Published: April 2023

With the rapid development of information technologies, the ability of Generative Design, which is included in production processes, to produce producible products by working integrated with simulation has started to rethink the future roles of industrial designers. Therefore, this study examines how Generative Design can progress with conventional production processes and how this progress can help designers in the future. The potential of the generatively obtained form-seeking processes, which are discussed in the scope of the study, to produce optimal results is emphasized. For this purpose, a generative design triggered design process was conducted with a firm in the real sector, the outputs were optimized in terms of manufacturability, and the effects of generative design-based inputs on the final product were discussed. Based on the results of the study, suggestions have been developed on how Generative Design can be transformed into producible results that can be a source of innovation.
La vivencialidad del mundo globalizado como objeto de la pedagogía geográfica en su práctica escolar cotidiana
Authors: Santiago Rivera José Armando
Published: April 2023

El propósito es explicar la vivencialidad del mundo globalizado como objeto de la pedagogía geográfica en su práctica escolar cotidiana. Se trata de una opción cuestionadora de la vigencia de la transmisividad conceptual, con los fundamentos de los cambios paradigmáticos y epistemológicos que promueven la elaboración del conocimiento y asumen la explicación de la realidad geográfica, con los testimonios de la subjetividad de los actores de los objetos de estudio. Eso determinó realizar una investigación documental para reflexionar sobre las condiciones del momento histórico, la complejidad de la realidad geográfica cotidiana y la pedagógica geográfica en el tratamiento de la vivencialidad comunitaria. Al concluir se promueve el análisis de la cotidianidad de los temas y problemáticas geográficas, por incentivar el proceso formativo en valores y favorecer en los ciudadanos la conciencia crítica. Además aporta el apremio de humanizar el tratamiento investigativo del territorio de la localidad habitada.

Palabras clave

Vivencialidad, Mundo Globalizado, Pedagogía Geográfica, Práctica Escolar.

 

A experiência do mundo globalizado como objeto da educação geográfica em seu cotidiano escolar

Resumo

O objetivo é explicar a experiencialidade do mundo globalizado como objeto da educação geográfica em sua prática escolar cotidiana. É uma opção que questiona a validade da transmissividade conceitual, com fundamento nas mudanças paradigmáticas e epistemológicas que promovem a elaboração do conhecimento e assumem a explicação da realidade geográfica, com os testemunhos da subjetividade dos atores dos objetos de estudo. Isso determinou realizar uma investigação documental para refletir sobre as condições do momento histórico, a complexidade da realidade geográfica cotidiana e a pedagogia geográfica no tratamento da experiencialidade comunitária. No final, promove-se a análise do cotidiano das questões e problemas geográficos, incentivando o processo formativo em valores e favorecendo a consciência crítica nos cidadãos. Contribui também a urgência em humanizar o tratamento investigativo do território da localidade habitada.

Palavras-chave

Experiencialidade, Mundo Globalizado, Pedagogia Geográfica, Prática Escolar.
Pivot of Pedagogy: How Minority Serving Institutions Adapted to the COVID-19 Pandemic
Authors: Hill Jerell B. , Fider Carlene O. , Hill Ricardo , Estrada Veronica
Published: April 2023

During the COVID-19 pandemic, issues regarding social justice, diversity, equity, inclusion, and respect were at amplified levels. Pacific Oaks College (PO) endeavored to keep its promise and maintain its mission and core values by connecting Culturally Sustaining Pedagogy (Paris, 2012) with Engaged Pedagogy (Florence, 1998) to leverage critical actions as real practice during distance learning. To explore how this occurred, the authors engaged in self-reflection practices by employing autoethnographic accounts. The overall goal is to examine the significance of community partnerships, students’ online readiness, and instructional practices used to pivot practice during the pandemic. Preliminary findings indicate that PO’s critical action to build strong community partnerships was successful. The “COVID Slide” (Kuhfeld et al., 2020) indicates that students may experience learning loss and elevated levels of depression and anxiety. This institution, faculty, students, and other constituents adapted its practices so that students could be provided opportunities to engage in research, internships, teaching practice, and fieldwork projects. Instructional systems (Fuhrman, 1990) that provide levels of support have become even more critical during distance learning. We sought to understand how instructional practices (Coburn et al., 2016; Desimone et al., 2002; Honig & Hatch, 2004) that support students and value their communities and cultural assets address educational disparities experienced by students of color. The COVID-19 pandemic has impacted the evolution, design, and facilitation of teaching and learning. The most responsive college, one that invests in supporting inclusive and equitable online learning experiences, will be best prepared to adapt to the teaching approaches of the future. The implication for practice is to radically rethink teaching practices from examining the disruption of learning to intentionally include equity-focused teaching strategies.
EDUCAÇÃO DE CRIANÇAS CIRCENSES: elementos para discutir o direito à educação de sujeitos artistas nômades
Authors: Martins Francisco André Silva , Felisberto Adrielle Caroline Santos , Teixeira Maryana Fortes Ferreira
Published: April 2023

RESUMO: Este trabalho apresenta os resultados de uma pesquisa desenvolvida no âmbito de uma Faculdade de Educação, curso de Pedagogia, em uma universidade na cidade de Belo Horizonte, Minas Gerais. A busca foi por analisar e compreender, por meio das memórias relatadas pelos sujeitos circenses que vivenciaram o processo de escolarização nas décadas de 1980/1990, os obstáculos encontrados em relação ao direito à educação e a sua permanência na escola, uma vez que esses artistas vivenciaram esse processo em situação de itinerância. Trata-se de uma pesquisa de cunho qualitativo, na qual a coleta de dados se deu por meio de escrevivências e de entrevista semiestruturada. Entrevistamos seis sujeitos, homens e mulheres, de idades variadas, o que nos possibilitou refletir sobre o aceso à educação e a permanência de crianças circenses na escola nas décadas de 1980/1990.
CORPO, CULTURA E AÇÃO: (RE)PENSANDO A EDUCAÇÃO FÍSICA ESCOLAR
Authors: Cruz Alexandre de Souza , Ferreira de Sousa Déborah Letícia , Silva Hermisson Felipe da , Menezes Ronny Diogenes de
Published: April 2023

O livro "Corpo, Cultura e Ação: (Re)Pensando a Educação Física Escolar", é uma obra fundamental para aqueles interessados na relação entre educação física escolar, corpo, cultura e ação. O livro explora como o corpo, como elemento central, expressa indivíduos e suas relações com o mundo e a cultura. A cultura influencia como o corpo é percebido e valorizado em diferentes contextos sociais, afetando como a educação física é praticada nas escolas. Os autores argumentam que a educação física é fundamental no desenvolvimento cognitivo, afetivo e psicomotor dos alunos, mas deve considerar diversas concepções culturais do corpo e abrir espaço para o diálogo. O livro oferece perspectivas teóricas e práticas, com nove capítulos discutindo temas como a relação entre esporte, mídia e cultura, a importância da formação de professores e da reflexão crítica, e o papel da educação física na educação de crianças pequenas. Os autores defendem uma abordagem mais crítica e reflexiva à educação física, enfatizando a necessidade de respeitar o corpo cultural diverso do movimento em sua dimensão de linguagem.
FEMINISMO NEGRO: EDUCAÇÃO ANTIRRACISTA E ANTISSEXISTA NA UNILAB
Authors: Barbosa Lilian , De Lima Silva Everton William , Santana Daniel Batista , Macedo Ramon Fagner de Queiroz
Published: April 2023

Feminismo negro, educação antirracista e antissexista na UNILAB" é um livro sobre a análise das questões curriculares e didáticas nos cursos de graduação do Instituto de Humanidades da UNILAB, que visa combater o preconceito de raça e gênero. A educação antirracista e antissexista é essencial para construir uma identidade consciente e comprometida com a promoção de novos saberes e epistemologias afro-perspectivadas, de igualdade de gênero e de valorização dos movimentos populares. É importante incorporar as discussões sobre currículo para romper com as tradicionais distorções educacionais e contribuir para a formação crítica antirracista. A pesquisa foi conduzida com uma abordagem qualitativa interdisciplinar e envolveu os/as discentes dos cursos de humanidades. A legislação, notadamente a Lei nº 9.394/96 (LDB), considerada uma das principais conquistas dos movimentos sociais de base popular, é fundamental para a regulamentação das políticas educacionais e curriculares.
DESAPARECIDOS DURANTE DITADURA MILITAR NO BRASIL NO ROMANCE K. RELATOS DE UMA BUSCA, BERNARDO KUCINSKI
Authors: Amorim Flor Maria Alice , Silva Eli Brandão da
Published: April 2023

Este trabalho objetiva analisar rastros interdiscursivos dos desaparecidos pela Ditadura Militar (1964-19850), no romance K. Relatos de uma busca, de Bernardo Kuncisnki, analisando figuras, temas relacionados à censura e repressão infligidas contra opositores do regime autoritário, dissimulação e silenciamento em relação aos presos políticos e as estratégias usadas para promover o apagamento dos desaparecidos. A obra, publicada inicialmente, em 2011, é baseada em fatos, tem como tema a busca, a angústia e o desespero de um pai (personagem K) por sua filha (personagem Ana) desaparecida durante a ditadura militar no Brasil. Trata-se de pesquisa bibliográfica, de natureza qualitativa, efetivada por abordagem que compreende elementos de semântica discursiva, de Maingueneau e Fiorin, na análise de figuras e temas, apoiando-se também na hermenêutica de Ricoeur. A trama deixa entrever rastros interdiscursivos que trazem à tona um cenário de crimes contra cidadãos brasileiros, que foram vítimas de censuras, detenções ilegais e clandestinas, torturas, mortes e tentativas de apagamento da memória dos fatos ocorridos. A busca em vão pela filha e o sofrimento de K. lança luz sobre a extensão do alcance dos crimes cometidos pelo Estado brasileiro, na medida em que as consequências dos danos se estenderam para familiares e sociedade brasileira até os dias de hoje, comprometendo a memória e a compreensão da história do país.
SUJEITO: UMA INVESTIDA DIDÁTICA
Authors: Silva Marcelo Medeiros da , Agra Marcos Wagner da Costa
Published: April 2023

RESUMO: O presente texto objetiva revisitar a noção de sujeito oracional a partir da perspectiva da Gramática Tradicional (GT), evidenciando as suas contradições e caráter pouco operatório. Além disso, como contraponto às definições encontradas em nossa tradição gramatical, ensejamos apresentar uma abordagem mais operatória e operacional que permita a identificação do sujeito ao nível da oração e que poderá auxiliar o ensino desse tópico gramatical, especialmente, na Educação Básica.

Palavras-chave: Sujeito. Gramática Tradicional. Ensino de Gramática.
A REPRESENTAÇÃO DA MATERNIDADE NA SOCIEDADE PATRIARCAL EM SAMANTHA SCHWEBLIN
Authors: Barbosa Lilian , Silva Mariana Gomes Pereira da
Published: April 2023

Neste artigo analisaremos o conto “Pajaros en la boca” (2009), presente no livro homônimo, da escritora argentina Samantha Schweblin. Tal leitura será realizada à luz das teorias do fantástico, para isto utilizaremos críticos como Todorov, Davis Roas, Felipe Furtado como aporte teórico. A escritora contemporânea, Samantha Schweblin, é uma das autoras que produzem uma literatura de autoria feminina voltadas a debater questões importantes presentes nas estruturas patriarcais enraizadas na sociedade. Dentro das características estruturais, a mais importante de “Pajaros en la boca” é o elemento insólito ligado as relações humanas, sobretudo a maternidade. O insólito se liga ao grotesco como ideia central e ao utilizar esse estilo torna possível questionar a forma como a maternidade e as tarefas de cuidado doméstico são retratadas por meio do grotesco, despertando a reflexão sobre as angústias e o abandono feminino. Schweblin é uma escritora que causa inquietação ao usar a ficção para explorar questões sociais, sua escrita é cheia de tensão e mistério, e suas histórias mantem com o leitor aprisionado muito tempo depois de terminada a leitura.
ENSINO-APRENDIZAGEM DE LÍNGUAS NO SÉCULO XXI: POLÍTICAS, PRÁTICAS DE ENSINO E DESAFIOS
Authors: Araújo Estefânnia Laryssa Lopes de Matos , Silva Rivaldo Ferreira da , Pereira da Silva Ana Caroline
Published: April 2023

O livro “Language Teaching-learning in the 21st century” é uma coletânea de 18 artigos que discutem e apresentam o ensino de língua inglesa no século 21 em diferentes perspectivas. A introdução, escrita por Bueno (2020), traz uma breve apresentação sobre o contexto histórico do ensino da língua inglesa no Brasil, bem como apresenta reflexões a respeito da imposição das línguas, de modo geral, nos territórios conquistados, e enfatiza que, no Brasil, a expansão/dominação da língua inglesa veio de outras formas, através de músicas, roupas e estrangeirismos. Bueno (2020), ancorada nos capítulos que formam esta coletânea, debruça-se em sintetizar as ideias defendidas ao longo do trabalho, especialmente destacando o papel do professor em relação aos processos de ensino e aprendizagem. Assim, é reforçado que o dever do professor é tentar integrar o aluno em interações, mediadas cada vez mais pelas tecnologias digitais, numa perspectiva crítica e reflexiva. Com base no exposto, sistematizamos esta resenha em: (i) breve apresentação dos organizadores do livro e (ii) visões gerais de cada capítulo considerando/enfatizando pontos importantes.
ESTÁGIO SUPERVISIONADO REMOTO DE LÍNGUA ESPANHOLA EM TEMPOS DE PANDEMIA:
Authors: Lima Luciane Pereira de , Silva Rickison Cristiano de Araújo , Souza Fábio Marques de
Published: April 2023

Diante do cenário pandêmico da COVID-19, o processo de ensino-aprendizagem passou por (re)adaptações, e os estágios supervisionados que anteriormente eram realizados na modalidade presencial foram substituídos por aulas remotas, mediadas com o apoio das TDICs. Neste contexto, os professores em formação inicial do curso de Letras – Espanhol, da Universidade Estadual da Paraíba, realizaram seus estágios através do Ensino Remoto de Emergência (ERE), utilizando as mais variadas ferramentas digitais, incluindo plataformas educacionais e redes sociais utilizadas na vida cotidiana. Nesta perspectiva, este estudo teve como objetivo refletir sobre a experiência dos professores de espanhol em formação inicial ao longo dos estágios supervisionados remotos durante a pandemia, evidenciamos as contribuições para sua formação e as dificuldades experimentadas durante este período.   Assim, verificamos que os estágios supervisionados durante a pandemia, permitiram aos futuros professores conhecer um novo contexto de prática docente, refletindo sobre as dificuldades pedagógicas e tecnológicas vividas por eles durante o ERE. Desse modo, se destacou a necessidade de estar sempre buscando uma formação para seu uso de forma reflexiva e crítica.
O ESTÁGIO SUPERVISIONADO NA FORMAÇÃO DE PROFESSORES PARA AS SÉRIES INICIAIS
Authors: Colombaretti de Oliveira Lúcia , Bongestab Cristina
Published: April 2023

O presente artigo pretende apresentar as principais considerações oriundas de um estudo realizado, junto a um curso de Habilitação Específica para o Magistério – H.E.M. em uma escola estadual do interior de São Paulo. O objetivo da pesquisa foi investigar como é desenvolvido o processo inicial de construção da prática docente de futuras professoras das séries iniciais do 1º Grau. A prática profissional iniciada pelas alunas indica como síntese, as contradições entre saber e fazer docente. Num momento, estabelecem relações entre o conhecimento adquirido e o conhecimento transformado em ensino e aprendizagem, revelando posturas críticas que na análise da realidade que experenciam e, num outro momento, repetem práticas desarticuladas e destituídas de fundamentação teórica e metodológica.