bluuebunny/crossref_metadata_2025_split huggingface dataset:
Good and Bad Readers: A Look at the High and Low Achievers in an ESP Canadian Studies Reading and Writing Course
Authors: Hopkins Nila Mendoza De , Mackay Ronald 
Published: April 2018

This study is part of an ongoing course in Canadian Studies for trainee EFL (English as a Foreign Language) teachers in La Universidad del Zulia, Maracaibo, Venezuela. This paper reports on the component of the project that examines the manner in which the trainees respond to the demands made by particular types of reading comprehension and composition exercises over a three-year period. Each year, 'think-aloud' data were collected from the five most successful and the five least successful students who had just completed the 64-hour reading and writing course with a distinct Canadian Studies content. The elicitation instrument consisted of a reading text and a set of exercises identical in type to those used during the course of instruction. The aggregated data were analyzed to categorize the strategies used by the two groups of students to complete the exercises. Findings discuss the larger number of strategies available and resorted to by successful students compared to the limited resources employed by the unsuccessful students.
A comprehensive prediction and evaluation method of pilot workload
Authors: Feng Chuanyan , Wanyan Xiaoru , Yang Kun , Zhuang Damin , Wu Xu 
Published: April 2018

BACKGROUND: The prediction and evaluation of pilot workload is a key problem in human factor airworthiness of cockpit. OBJECTIVE: A pilot traffic pattern task was designed in a flight simulation environment in order to carry out the pilot workload prediction and improve the evaluation method. METHODS: The prediction of typical flight subtasks and dynamic workloads (cruise, approach, and landing) were built up based on multiple resource theory, and a favorable validity was achieved by the correlation analysis verification between sensitive physiological data and the predicted value. RESULTS: Statistical analysis indicated that eye movement indices (fixation frequency, mean fixation time, saccade frequency, mean saccade time, and mean pupil diameter), Electrocardiogram indices (mean normal-to-normal interval and the ratio between low frequency and sum of low frequency and high frequency), and Electrodermal Activity indices (mean tonic and mean phasic) were all sensitive to typical workloads of subjects. CONCLUSION: A multinominal logistic regression model based on combination of physiological indices (fixation frequency, mean normal-to-normal interval, the ratio between low frequency and sum of low frequency and high frequency, and mean tonic) was constructed, and the discriminate accuracy was comparatively ideal with a rate of 84.85%.
Multi-task fused sparse learning for mild cognitive impairment identification
Authors: Yang Peng , Ni Dong , Chen Siping , Wang Tianfu , Wu Donghui , Lei Baiying 
Published: April 2018

BACKGROUND: Brain functional connectivity network (BFCN) has been widely applied to identify biomarkers for the brain function understanding and brain diseases analysis. OBJECTIVE: Building a biologically meaningful brain network is a crucial work in these applications. For this task, sparse learning has been widely applied for the network construction. If multiple time-point data is added to the brain imaging application, the disease progression pattern in the longitudinal analysis can be better revealed. METHODS: A novel longitudinal analysis for MCI classification is devised based on resting-state functional magnetic resonating imaging (rs-fMRI). Specifically, this paper proposes a novel multi-task learning method to integrate fused penalty by regularization. In addition, a novel objective function is developed for fused sparse learning via smoothness constraint. RESULTS: The proposed method achieves the best classification performance with an accuracy of 95.74% for baseline and 93.64% for year 1 data. CONCLUSIONS: The experimental results show that our proposed method achieves quite promising classification performance.
Bayesian Inference on the Radio-quietness of Gamma-ray Pulsars
Authors: Yu Hoi-Fung , Hui Chung Yue , Kong Albert K. H. , Takata Jumpei 
Published: April 2018

Abstract
For the first time we demonstrate using a robust Bayesian approach to analyze the populations of radio-quiet (RQ) and radio-loud (RL) gamma-ray pulsars. We quantify their differences and obtain their distributions of the radio-cone opening half-angle δ and the magnetic inclination angle α by Bayesian inference. In contrast to the conventional frequentist point estimations that might be non-representative when the distribution is highly skewed or multi-modal, which is often the case when data points are scarce, Bayesian statistics displays the complete posterior distribution that the uncertainties can be readily obtained regardless of the skewness and modality. We found that the spin period, the magnetic field strength at the light cylinder, the spin-down power, the gamma-ray-to-X-ray flux ratio, and the spectral curvature significance of the two groups of pulsars exhibit significant differences at the 99% level. Using Bayesian inference, we are able to infer the values and uncertainties of δ and α from the distribution of RQ and RL pulsars. We found that δ is between 10° and 35° and the distribution of α is skewed toward large values.
A Roadmap for Adopting a Digital Lifecycle Approach to Offshore Oil and Gas Production
Authors: Grange Elgonda La 
Published: April 2018

Abstract
In recent years, there has been a great deal of discussion surrounding the opportunities presented by digitalization in offshore oil and gas. However, despite the increased attention, operators have received little direction from digital solutions providers on how to fully capitalize on its benefits. This paper will aim to change that by providing a blueprint for adopting a digital lifecycle approach to offshore oil and gas production.
The approach presented in this paper, which we will refer to as Topsides 4.0 for ease of reference, is an integrated digital lifecycle approach to rotating equipment and electrical and automation systems, underpinned by secure communications. The approach is designed to enable digital design and manufacturing, virtual testing and commissioning, and delivery of an intelligent "digital twin" of a topsides facility. The digital twin is a virtual replica that mirrors the physical facility in near real-time, thus providing a number of advantages to offshore O&G producers, including the capability to run virtual what-if scenarios on the asset and better understand how process, equipment, and maintenance would be impacted by different operating conditions.
Additionally, the paper will address challenges and concerns associated with digitalization in offshore O&G production, such as cybersecurity. It will also outline expected cost and schedule savings that topsides operators can achieve by embracing a fully digitalized approach, some of which include 3 – 9 month reduction in cycle times, $10 - $15 million reduction in CAPEX, and $100 million reduction in OPEX over a 10-year period.
Elimination of Fresh Water Use for Chemical Cleaning in Sulfate Removal Units SRU
Authors: Moreira Alexandre M. B. , Lage Gustavo Garios , Tendillo Manuel G. S. , Zhang Xingpeng , Rodrigues Danielle , Pessoa Fábio 
Published: April 2018

Abstract
Water has become more and more a scarce resource and its use rationalization has been a challenge in its several applications. Its status has become even more critical for some platforms and/or oil exploration ships (FPSO =&gt; Floating Production Storage and Offloading), that have fresh water (drinkable water) production stations via reverse osmosis and or desalters with limited flows to supply all routine demand and in emergency cases, and it may even be necessary to purchase fresh water from third parties, by means of towing vessel with extremely high unit cost (continent catchment). Thus, we will present in this paper the achievement reached by using a small permeated water volume in SRU (Sulfate Removal Unit), which water, has low sulfate content and is used for injection and in CIPs (Clean In Place) cleaning system, which stands for a large drinkable water consumption within the platform.
The research to be described in this technical document, concerning the permeated water use in SRU to use in CIP solutions, will show the achievement reached in a platform in Brazil, after 2.5 years of research in our Singapore Advance Research Center, using a pilot plant.
BC10 Mudline Pump - A Cost Saving Solution for Brownfields
Authors: Liney D. J. , Bekker M. A. , Broderick R. J. , Cardoso E. W. , Fletcher N. , Bourne M. 
Published: April 2018

The Parque das Conchas (BC10) field offshore Brazil, operated by Shell and owned together with ONGC and QPI, has challenging reservoir conditions. Several subsea fields with viscosities ranging from 1 to 900 cP and gas volume fractions between 5% and 70% require subsea boosting to lift production fluids to the FPSO facility. Since first oil in 2009, a unique method of subsea separation and boosting has been deployed on BC-10, utilizing vertical caisson separators with Electrical Submersible Pumps (ESP's) to pump well fluids from up to 2000m water depth to the FPSO facility. Maintenance of the ESP assemblies requires an intervention using a MODU (Mobile Offshore Drilling Unit).
Shell pursued an alternative subsea boosting solution using Mudline Pump (MLP) technology, with the objective to reduce field Opex and increase redundancy. The MLP was conceived as a retrofit module, which was to be fully compatible with the existing infrastructure. This includes using existing variable frequency drives, high voltage umbilicals, subsea mechanical interfaces, controls, hydraulics, and chemical injection. Despite the prior development of a 3 MW (megawatt) MudLine Pump (MK1), the specifics of the BC10 application required further development and qualification. The design pressure was increased from 5,000 psi to 7,500 psi, which required requalification of motor and barrier fluid circuit components. Additionally, the challenging multiphase flow conditions led to the development of an innovative control strategy to maximise the production window, whilst ensuring safe operating conditions for the pump within the existing system constraints.
Expand the Use of Open Wireless Gas Detection Systems for Life Safety and Asset Integrity
Authors: Yeo Julian , Chin Wil 
Published: April 2018

As companies struggle to improve the health and safety of the workforce in heavy industrial process industries, it is clear that current solutions demand the flexibility and the fast deployment that an open WirelessHART gas detection system can provide.
Untethering toxic and combustible gas detection systems provide:
Additional coverage - identifies dangerous workforce environments for fast mitigation and improve life safety
Measurements for predictive maintenance program for equipment such as pumps, valves, and tanks
Use of gas detection for identifying leaks in difficult to measure infrastructure such as insulated piping to ensure asset integrity
WirelessHART standard IEC 62591
ISA-TR84.00.07-2010 Technical Report, Guidance for Application of Wireless Sensor Technology to Non-SIS Independent Protection Layers
ISA-TR84.00.08-2017-Technical Report, Guidance on the Evaluation of Fire, Combustible Gas and Toxic Gas System Effectiveness
Deployment in days in lieu of weeks
Reduction in wiring costs
Leaks vs time to detect leaks
Long term performance
Best Practices for deploying wireless gas detection systems
High Speed Telemetry on Wired Drill Pipe, History, and Impact on Drilling Process
Authors: Foster Robert , Macmillan Robin 
Published: April 2018

Abstract
This paper discusses the history and impact of using high-speed telemetry and wired drill pipe on the drilling process. Efficiency gains, well placement advantages, campaign cost reductions, automation improvements, as well as what other operational efficiencies high-speed telemetry can enable.
Improved Operation of Subsea Boosting Systems through Advanced Condition Monitoring and Data Analytics
Authors: Johnsrud Per Christian , Tømmerberg Kyrre , Haaverstad Marius 
Published: April 2018

Abstract
In the current oil and gas market, operators are seeking cost-effective and reliable ways to maximize production from existing infrastructures and to improve economics for greenfield applications. Subsea boosting is a technology enabling economically viable subsea tie-backs, life extension of mature fields and increased profitability of new projects. This paper will show how advanced condition monitoring technology can improve operation of boosting systems, thus making this technology more attractive for field operators.
In recent years, new sensor technologies have been qualified for subsea use and new platforms for handling large quantities of data have been developed. Aker Solutions has combined these technologies in the development of a novel advanced condition monitoring system for subsea boosting applications. Through use of sensor technology and an integrated software and data analytics platform, it is now possible to operate the pump more efficiently. Increasing the reliability of the boosting system by introducing predictive maintenance planning is a key element in reducing the OPEX and improving the operation of the field.
Through execution of an extensive testing campaign in a full-scale multiphase test loop, Aker Solutions has been looking at a number of operating conditions, with varying mixtures of water and gas to demonstrate the performance of this new technology. During the testing, new usage of proximity probes and sensor technologies demonstrated the effectiveness of the system for real-time operation management.
This paper outlines the architecture of the system and presents how the hardware improvements, combined with the latest digitalization technologies, can extend the operating envelope of the system and improve availability.
Optimized Field Development through Integrating Field Network with Dynamic Reservoir model
Authors: Hatvik Mahanaz , Nørgård Jens Petter , Berg Kjartan , Vannes Knut , Irmann-Jacobsen Tine Bauck , Cantero Alberto Diaz 
Published: April 2018

The world's average oil recovery factor is estimated to be 35%. Increased oil and gas recovery will depend on the availability and utilization of appropriate technology as well as efficient reservoir management and economic strategies. This creates the need for efficiently scanning and evaluating various field architectures during the field development phase, with respect to installed cost, operability and hydrocarbon recovery. A major step towards achieving this improvement is to couple the reservoir performance with the production network.
The objective of this paper is to describe an efficient methodology for coupling one or several dynamic reservoir models with the production network model. This enables effective comparison between different field development concepts including various applications of subsea processing.
To investigate this integrated approach, a real case study has been performed on the Alta and Gotha discoveries operated by Lundin in the Barents Sea.
Numerical Study of Vortex Induced Motion and Vibrations on Risers and Tension Leg Platform for Malikai
Authors: Gupta J. K. , Bhat S. , Yang T. K. 
Published: April 2018

The operating environment for the Malikai project is strong and persistent current with speed up to 2 m/s for even a return period of 50 years. This could lead to vortex induced vibration (VIV) of the risers and vortex induced motion (VIM) of the floating systems such as Tension Leg Platform (TLP) or Tender Assisted Drilling (TAD) vessel. The VIV and VIM could affect the riser and mooring system strength and subsequent failure. This could lead to unplanned production deferment and riser maintenance. Therefore, the current study investigated the VIV and VIM phenomenon for Malikai riser and floating system respectively.The Malikai project used U shaped AIMS fairing to suppress VIV of the risers. These fairings have low drag, provide operational advantage and faster installation compared to traditional VIV suppression methods. Computational Fluid Dynamics (CFD) simulations were performed for the fairing and riser system and confirmed low drag coefficient (0.4) in Malikai environment. Experiments verified it further.The second part of the study was focussed on investigating VIM of TLP and TAD. The CFD simulations were first carried out to validate the motion of TLP at the lab-scale and established a methodology. The established methods were then used to predict VIM for Malikai TLP and combined motion of TLP-TAD. The drag and lift coefficient for the lab scale TLP at reduced velocity of 10 and heading of 22.5° was 1.33 and 0.13 respectively. The nominal surge, sway and yaw amplitude at this condition was 0.05, 0.12, and 1.8 respectively. These predictions were in well agreement with the experimental data obtained from the University Technology Malaysia (UTM). The sway and yaw frequencies were twice of surge indicating VIM. The motion amplitudes for the Malikai TLP were smaller than the lab scale experimental data at reduced velocity of 5. This could be attributed to difference in Reynolds number and tendon arrangement. There was no evident dominating frequency of motion. It was more of a flow induced motion. The drag and lift coefficients for TLP/TAD at heading of 0° was 1.1/0.28 and 0.014/.001 respectively. The drag and lift coefficients are lower for TAD as it is in the wake of TLP (lower currents around TAD). The motion amplitude for TAD were higher than TLP due to more fluctuations in the drag and lift forces. This could be attributed to TAD having only two pontoons.The motion amplitudes were overall small for all the cases and could be due smaller submersed height of columns above the pontoons. The motion and drag predictions can be directly used in the design of hull, riser and mooring line systems and can be further integrated with structural analysis to obtain the fatigue life. This was an attempt to capture the VIM and has indicated promising results. An exhaustive validation can aid in standardization of CFD methods and make it a potential tool to predict VIM. Accurate predictions can help in lowering and building confidence in design parameters.
Shearography Inspection to Assess the Structural Integrity of Composite Repairs in Metallic Piping
Authors: Soares Sergio Damasceno , Fampa Ana Lucia , Albertazzi Armando , Fantin Analucia V. , Willemann Daniel P. , Benedet Mauro E. , Silva Fábio A. 
Published: April 2018

Abstract
Metallic pipes installed at top side offshore platforms may show corrosion damage. The corrosive process can be external or internal. One of the forms for mitigation consists in installation of composite repair to recompose the structural integrity of the corroded pipe segment. These kinds of repairs are normalized and considered temporary. After the designed time the repairs must be removed. To bypass the inconvenience of repair removing and production losses associated with the replacement of the corroded area, several projects are running to develop methods to ensure the integrity of the repair and the maintenance of the integrity of the piping. This article presents the development of a shearography system for integrity assessment of composite repairs. This system was developed in conjunction with UFSC. Several laboratory tests performed at real piping systems were done to develop: optomechanical and electronic systems, software and procedure to data acquisition. After laboratory tests, several field tests were performed at offshore and onshore situations to defined the final methodology to be used at real situations. Among the tests performed during development can be cited a campaign held in the PRCI. The technology was field proved at Campos Basin platform and shows that shearography inspection could help Integrity Management groups to keep the installation running in a safety conditions. Auxiliary systems derivatives were tested in similar situations in the inspection of structural composite repairs on hulls of FPSO. It was concluded that shearographic inspection is suitable to assessing the integrity of composite repairs on offshore piping. The next step will be hired this type of service in a regular basis.
Overview of DeepStar Project to Demonstrate the Use of API 17 TR8 - Verification and Validation
Authors: Peters Daniel T. , Gomes Joseph V. , Pham Man , Tipple Chris 
Published: April 2018

Abstract
Structural Integrity Associates (SIA) will share some of the impactful collaborative efforts completed within the DeepStar® Global Deepwater Technology Development Program, as part of DeepStar® 12302 20 ksi Systems project, leading to the development of industry standards and being used as a guideline for deployment with API 17 TR 8 procedure. Additionally, SIA will share the status of the next phase of the validation portion of the project being undertaken.
Subsea equipment with working pressures of 20 ksi and above has been in discussion for several years and is gaining traction with various operators. The purpose of this project is to demonstrate the use of the various design methods discussed in API 17 TR8 [8,9] considering a 5 inch 20 ksi tee assembly, through both verification and validation.
The exercise will provide an example analysis that applies independent usage of API 17 TR8 [8,9]. The process will also allow current 20 ksi contributors and operators to comment on the scope of work in both the verification analysis and validation testing protocol. This will help put into practice the use of API 17 TR8 [8,9] document and provide an independent example of its use.
Structural Integrity Associates, Inc. (SIA) performed a verification assessment for DeepStar using API 17 TR8 [8,9] and the referenced industry standards described therein. This project included (1) Generation of Functional Specification, (2) generation of an example Failure Mode, Effects, and Criticality Analysis (FMECA), (3) design verification, (4) development of a validation protocol, (5) investigation of hydrostatic test effects, (6) fatigue monitoring, (7) investigation of cladding effects, (8) extreme and survival limits, and (9) a comparison of design and total life. After the successful completion of the first phase verification assessment, the current second phase of validation testing includes (1) material characterization, (2) testing of the components for validation of the finite element models for shakedown, (3) testing to validate the models used in the Load Resistance Factor Design (LRFD) for the global criteria.
This paper will provide an overview of the verification assessment performed, an overview of key findings from that report, and validation testing currently being undertaken. Additionally, several areas where official interpretations were requested from ASME to clarify its Codes and Standards will be reviewed.