bluuebunny/crossref_metadata_2025_split huggingface dataset:
Clonidine and Electrocardiograms
Authors: BLACKMAN JAMES A. , SAMSON-FANG LISA , GUTGESELL HOWARD 
Published: December 2021

Maloney and Schwam provided an example of the potential power of a letter to the editor of a major journal. By calling attention to a drug company's record of three instances of sudden death in children taking clonidine and methylphenidate concomitantly, common practice and even perceived standard of care may change. Many adults and children have been on clonidine with or without methylphenidate but have not had this dire consequence.
Reports of untoward effects of commonly used drugs are useful but recommendations for changes in care practice, especially when they involve considerable expense and anxiety for patients and parents, should be made cautiously and rationally.
In Reply: Questions About Varicella Vaccine
Authors: PLOTKIN STANLEY A. 
Published: December 2021

I am pleased that my commentary evoked such a response, even if critical, as the attitude of pediatricians towards varicella vaccine is key to its use. Rather than reply to each letter individually, I will group the criticisms as follows:
1. Varicella is not a serious disease. The same mail that brought the letters also brought a journal containing a paper that reports 24 cases of invasive group A streptococcal infections observed in Los Angeles over a 3-month period among children with varicella, which is not unusual.
PERICARDIAL EFFUSION AND CARDIAC TAMPONADE AFTER COVID-19 VACCINE: A RARE CASE REPORT
Authors: KARAKAYALI Muammer , OFLU Yusuf 
Published: December 2021

A 44-year-old female patient with no known history
of chronic disease was admitted to the emergency
room with tachycardia and shortness of breath after
covid-19 vaccine (Pfizer Biontech). The blood pressure
of the patient who was consulted to cardiology: 80/40
mmHg. Echocardiography (ECHO): Ejection Fraction
was 65%, pericardial effusion (PE) was present at
its widest point, 5 cm encircling the heart, collapsing
the right heart cavities in diastole, forming the clinic
of tamponade. Emergency pericardiocentesis was
applied to the patient. Pericardial fluid content of the
patient was serous. The patient, whose clinical stability
was stabilized after pericardiocentesis, was followed in
the coronary intensive care unit. No pericardial effusion
was observed in the control echo duringfollow-up.
Thepatient's PCR results were negative. The patient
was discharged with cardiology outpatient control.
The effects of design parameters on the elastic properties of PLA-Graphite composites fabricated by 3D printing
Authors: Rubashevskyi Viktor , Shukayev Sergiy 
Published: December 2021

Abstract. Recently, in 3D printing, consumables such as polymers, metals, and ceramics are being replaced with composites, which makes it possible to enhance the mechanical and other important properties of products.
The purpose of this study is to investigate the effects that the orientation and thickness of the layers of printed samples made of composite monofilament based on PLA+ with a 5% content of layered graphite, and other such parameters, have on the elastic properties of the printed samples. The samples, developed in accordance with the DSTU EN ISO 527-2: 2018 standard, were printed using the FDM technology with three different orientation angles (0o, 45o, 90o) and three layer thicknesses (0,1 mm, 0,2 mm, 0,3 mm) for each angle. Tensile tests were performed using the complete factorial experiment design (consisting of two factors at three levels, with nine tests in total). Based on the results of these tests, a regression model was developed to describe the relationship between the (effective) modulus of elasticity and the selected design parameters.
Theory of creation and practice of using vibrating machines for various technological purposes
Authors: Nazarenko І. , Dedov O. , Sviderskyy А. , Bondarenko А. , Zapryvoda А. , Mishchuk E. , Nesterenko М. 
Published: December 2021

The paper presents the results of the study of vibration machines for technological purposes. The theory of
joint movement of working bodies of vibrating machines and the processed environments modeled by discrete-continuous
systems is developed. The complex approach to the decision of a question of modeling of difficult dynamic systems with variable characteristics of elastic elements at realization of working process is considered. The parameters of resonant vibration systems with directional oscillations for surface compaction, polyphase oscillations and spatial oscillations are determined. The basic principles of such approach to the decision of a question of rational use of materials at designing
of cars are resulted. New designs of machines and their components are offered. The data on researches which are introduced in educational process, normative documentation and in the industry are resulted.
Is Discretionary Care Associated with Safety Among Medicare Beneficiaries Undergoing Spine Surgery?
Authors: Ko Hyunkyu , Brodke Darrel S. , Vanneman Megan E. , Schoenfeld Andrew J. , Martin Brook I. 
Published: December 2021

Background:
Spine surgery and its corresponding costs have increased in recent years and are variable across geographic regions. Discretionary care is the component of spending variation that is independent of illness severity, age, and regional pricing. It is unknown whether greater discretionary care is associated with improved safety for patients undergoing spine surgery, as we would expect from value-based health care.

Methods:
We conducted an analysis of 5 spine surgery cohorts based on Medicare claims from 2013 to 2017. Patients were grouped into quintiles based on the Dartmouth Atlas End-of-Life Inpatient Care Index (EOL), reflecting regional spending variation attributed to discretionary care. Multivariable regression examined the association between discretionary care and safety measures while controlling for age, sex, race, comorbidity, and hospital features.

Results:
We observed a threefold to fourfold variation in 90-day episode-of-care cost across regions, depending on the cohort. Spine-specific spending was correlated with EOL quintile, confirming that spending variation is due more to discretionary care than it is to pricing, age, or illness severity. Greater spending across EOL quintiles was not associated with improved safety, and, in fact, was associated with poorer safety in some cohorts. For example, all-cause readmission was greater in the high-spending EOL quintile relative to the low-spending EOL quintile among the “fusion, except cervical” cohort (14.2% vs. 13.1%; OR = 1.10; 95% CI = 1.05 to 1.20), the “complex fusion” cohort (28.0% vs. 25.4%; OR = 1.15; 95% CI = 1.01 to 1.30), and the “cervical fusion” cohort (15.0% vs. 13.6%; OR = 1.12; 95% CI = 1.05 to 1.20).

Conclusions:
Wide variation in spending was not explained by differences in illness severity, age, or pricing, and increased discretionary care did not enhance safety. These findings point to inefficient use of health-care resources, a potential focus of reform.

Level of Evidence:
Economic and Decision Analysis Level IV. See Instructions for Authors for a complete description of levels of evidence.
Interpretation of Magnetic Anomalies over 2D Fault and Sheet-Type Mineralized Structures Using Very Fast Simulated Annealing Global Optimization: An Understanding of Uncertainty and Geological Implications
Authors: Biswas Arkoprovo , Rao Khushwant 
Published: December 2021

Abstract
Identification of intraterrane dislocation zones and associated mineralized bodies is of immense importance in exploration geophysics. Understanding such structures from geophysical anomalies is challenging and cumbersome. In the present study, we present a fast and competent algorithm for interpreting magnetic anomalies from such dislocation and mineralized zones. Such dislocation and mineralized zones are well explained from 2D fault and sheet-type structures. The different parameters from 2D fault and sheet-type structures such as the intensity of magnetization (k), depth to the top (z1), depth to the bottom (z2), origin location (x0), and dip angle (θ) of the fault and sheet from magnetic anomalies are interpreted. The interpretation suggests that there is uncertainty in defining the model parameters z1 and z2 for the 2D inclined fault; k, z1, and z2 for the 2D vertical fault and finite sheet-type structure; and k and z for the infinite sheet-type structure. Here, it shows a wide range of solutions depicting an equivalent model with smaller misfits. However, the final interpreted mean model is close to the actual model with the least uncertainty. Histograms and crossplots for 2D fault and sheet-type structures also reveal the same. The present algorithm is demonstrated with four theoretical models, including the effect of noises. Furthermore, the investigation of magnetic data was also applied from three field examples from intraterrane dislocation zones (Australia), deep-seated dislocation zones (India) as a 2D fault plane, and mineralized zones (Canada) as sheet-type structures. The final estimated model parameters are in good agreement with the earlier methods applied for these field examples with a priori information wherever available in the literature. However, the present method can simultaneously interpret all model parameters without a priori information.
Global Buckling Characteristics of Offshore Bundled Pipeline System
Authors: Yurindatama Danar Tri , Singh Nawin , Pillai Vinod 
Published: December 2021

Abstract
In recent years, the global buckling assessment of offshore pipelines in High Pressure-High Temperature (HPHT) condition become increasingly challenging since more complex pipeline system arrangement e.g. pipe(s) or cable(s) is strapped onto a larger pipeline, are rapidly utilized in many areas. Yet, the detailed guideline to assess the buckle of bundles remains unclear, therefore this study will focus to investigate on a methodical and reproducible approach to analyze in-service buckling behavior of bundled offshore pipeline system. The global buckling behavior of bundled offshore pipeline system in this study is investigated using commercial Finite Element (FE) software. Two carbon steel pipelines with different diameter are bundled and the buckling behavior is studied under the influence of buckle triggers. In the actual condition, the rogue buckle trigger is generated from OOS (out of straightness) or imperfection e.g. due to laying tolerance. Varying dimension parameter such as diameter ratio between the main pipeline and strapped pipeline are considered to understand the impact of this parameter on the buckle behavior. The study begins with a comparison of the results using numerical and analytical approaches on a straight pipeline in an unbuckled condition for validation purposes. The design parameters including wall thickness, process data, and pipe-soil interaction data, are varied since it influences the buckle behavior. In addition, some design parameter such as material properties and pipeline length will be adopted from a typical offshore pipeline project and the values are fixed so the exercise can focus on the most governing parameters. Following this, two numerical modelling methods, the equivalent properties method and the connector method, are presented in this study to simulate bundled systems. With a good agreement between the analytical and numerical approach, some buckle trigger is introduced on the numerical model of the bundled pipeline so the system is able to buckle and the behavior can be evaluated further. The strain level, lateral displacement, axial feed-in and pipe integrity shall be reported in the post-buckle conditions for both main pipe and strapped pipe as per current code and standard requirement. With more reliable results of buckling assessment for bundled pipeline system, it gives technical confidence and a major saving in both Capital Expenditure (CAPEX) and Operational Expenditure (OPEX). Industry has put serious effort through various Joint Industry Projects (JIP) to develop the global buckling assessment guideline in order to ensure long term integrity operation. Although the JIP guideline is predominantly for single pipeline system, similar assessment is demanded also for bundled pipeline system which described in this study. Key findings of the assessment are presented along with an overview of the design process and the typical mitigation techniques to be considered for similar subsea pipeline projects.
Supporting Decommissioning/Conversion of Offshore Structures Applying Innovative Technological Solution INSURE project
Authors: Speranza Davide , Vignali Andrea , Pacini Andrea , Ori Gian Gabriele , Palucci Antonio 
Published: December 2021

Abstract
Companies that work in the decommissioning of platforms need tools to make smarter and informed business decisions, manage and analyse business data, increase the security of workers and operate under strict environmental protection regulations. INSURE aims at assessing the feasibility of a new service to support the decommissioning of offshore installations by means of technological innovation made available throughout each process’ step.
In order to accomplish this, the project gathers high-impact Italian companies bringing together the best applicable technological and scientific know-how. INSURE foresees to combine these know-hows and create a novel tool at the service of the industry to promote a better and safer approach to the operations. Targets of the INSURE project are improving workers’ safety, enhancing environmental monitorings, increasing operations’ efficiency, reducing operational costs, offering a route for future sustainability.
Project targets can be achieved through the realisation of an augmented virtual reality platform (AVRP) that will be operated in support of the decommissioning process where the data acquired/transmitted by a plurality of sensors will converge. A fleet control tool integrates information from sensors installed on autonomous aerial and underwater vehicles making use of the Global Satellite Navigation Systems (GSNS) and Satellite Communications (SatCom). The convergence of top-notch technologies (augmented/virtual reality, 3D, robotics, sensors, 5G and Satellite services), together with a cloud of infrastructure, enables a fast and complete access to real-time data at very high resolution. The proposal aims to bring the actual data and information access from the Internet of Things to the Internet of Knowledge paradigm.
Confrontation with national and international possible end-users produced a set of user requirements guiding the design of a feasibility study for the realisation of one specific product. The study also includes the evaluation of economic, non-economic viability and possible regulatory constraints to its realisation. The INSURE feasibility study creates the intellectual background for the further step of the process: the realisation and development of a pilot project tailored for the purpose.
This combined use of novel technologies represents an innovative integrated approach applied to the management of offshore structures undergoing decommissioning or reconfiguration for other purposes. In addition, it also involves the promotion of sustainable opportunities for commercial, social and educational exploitation of areas and assets (including, for example, the ambit of eco-tourism, renewable energies, carbon capture and storage).
High-Sensitivity, Portable Online Measurement of Defects and Anomalies in Coiled Tubing Strings
Authors: Aziz Mustafa , Abdula Reyah , Al-Dujaili Mohamad 
Published: December 2021

Abstract
A high-sensitivity, low-power and portable coiled-tubing (CT) inspection tool is developed based on magnetic flux leakage (MFL) technology. The tool provides enhanced real-time integrity monitoring of CT operations to minimize the risks of unexpected failures and enable efficient management of CT operations. This paper discusses practical design and engineering considerations to enhance the sensitivity of the magnetic inspection head, including magnetic characterization of the CT material, pole-piece separation, parametric calculations of the gap field, eddy currents, and MFL signal bandwidth. Experimental measurements illustrate the capability of detecting defects down to 1 mm in diameter and depth in a 1.5" CT pipe.
Saliency-Map Guided Salt Prediction by a Multi-Channel Convolutional Neural Network
Authors: Jiang Fan , Norlund Phill 
Published: December 2021

Abstract
One of the major challenges in seismic imaging is accurately delineating subsurface salt. Since a salt boundary has strong impedance compared with other sediments, we build a saliency map with intensity and orientation to create a pixel-level model for salt interpretation. In this abstract, we train a saliency-map as an additional attribute to combine with the original seismic to predict salt bodies. We also train a saliency-map to classify multiple geological facies in a multi-channel convolutional neural network with residual net architecture to help build subsurface velocity models. Two examples are shown which demonstrate that a saliency-map-plus-seismic model successfully improves the accuracy of salt prediction and reduces artifacts.
Development and First Application of an Ultra-Low Density Non-Aqueous Reservoir Drilling Fluid in the United Arab Emirates: A Viable Technical Solution to Drill Maximum Reservoir Contact Wells Across Depleted Reservoirs
Authors: Jeughale Ramanujan , Andrews Kerron , Al Ali Salim Abdalla , Toki Takahiro , Tanaka Hisaya , Sato Ryosuke , Luzardo Juan , Sarap Girish , Chatterjee Saumit , Meki Zakaria 
Published: December 2021

Abstract
Drilling and completion operations in depleted reservoirs, are challenging due to narrow margin between pore and fracture pressures. Therefore, Ultra-Low Density Reservoir Drilling Fluid (RDF) with optimum parameters is required to drill these wells safely. Design and effective field application of a sound engineered fluid solution to fulfill these operational demands are described.
Ultra-Low Density RDF NAF with minimal fluid invasion characteristics was developed after extensive lab testing, to cover the fluid density from 7.2 – 8.0 ppg. The fluid properties were optimized based on reservoir requirements and challenging bottom-hole conditions. The design criteria benchmarks and field application details are presented. Fluids were stress tested for drill solids, reservoir water and density increase contamination. Multi-segment collaboration and teamwork were key during job planning and on-site job execution, to achieve operational success.
For the first time in UAE, a major Offshore Operator successfully applied an Ultra-Low Density RDF-NAF, which provided remarkable stability and performance. The fluid was tested in the lab with polymeric viscosifier alone and in combination with organophilic clay. In order to gain rheology during the initial mixing, about 3.0 ppb of organophilic clay were introduced to system along with the polymeric viscosifier. Later, all the new fluid batches were built with polymeric additives alone to achieve target properties. A total of 10,250 ft of 8 ½" horizontal section was drilled to section TD with record ROP compared to previous wells in the same field, with no fluids related complications. With limited support from the solid control equipment, the team managed to keep the density ranging from 7.5 ppg to 7.8 ppg at surface condition, using premixed dilution.
Bridging was monitored through actual testing on location and successfully maintained the target PSD values throughout the section by splitting the flow on three shaker screen size combination. Due to non-operation related issues, hole was kept static for 20 days. After such long static time, 8 ½" drilling BHA was run to bottom smoothly precautionary breaking circulation every 5 stands. Finally, after successful logging operation, 6 5/8" LEL liner was set to TD and the well completed as planned.
Success of this field application indicates that an Ultra-Low density fluid can be designed, run successfully and deliver exemplary performance. Lessons learned are compared with conceptual design for future optimization. Laboratory test results are presented, which formed the basis of a seamless planned field application.
Improving Operational Efficiency Using Automated Time Analysis for Multi-Well Pad Fracturing
Authors: Siddiqui Fahd , Kamyab Mohammadreza , Lowder Michael 
Published: December 2021

Abstract
The economic success of unconventional reservoirs relies on driving down completion costs. Manually measuring the operational efficiency for a multi-well pad can be error-prone and time-prohibitive. Complete automation of this analysis can provide an effortless real-time insight to completion engineers. This study presents a real-time method for measuring the time spent on each completion activity, thereby enabling the identification and potential cost reduction avenues.
Two data acquisition boxes are utilized at the completion site to transmit both the fracturing and wireline data in real-time to a cloud server. A data processing algorithm is described to determine the start and end of these two operations for each stage of every well on the pad. The described method then determines other activity intervals (fracturing swap-over, wireline swap-over, and waiting on offset wells) based on the relationship between the fracturing and wireline segments of all the wells. The processed data results can be viewed in real-time on mobile or computers connected to the cloud.
Viewing the full operational time log in real-time helps engineers analyze the whole operation and determine key performance indicators (KPIs) such as the number of fractured stages per day, pumping percentage, average fracture, and wireline swap-over durations for a given time period. In addition, the performance of the day and night crews can be evaluated.
By plotting a comparison of KPIs for wireline and fracturing times, trends can be readily identified for improving operational efficiency. Practices from best-performing stages can be adopted to reduce non-pumping times. This helps operators save time and money to optimize for more efficient operations. As the number of wells increases, the complexity of manual generation of time-log increases. The presented method can handle multi-well fracturing and wireline operations without such difficulty and in real-time.
A case study is also presented, where an operator in the US Permian basin used this method in real-time to view and optimize zipper operations. Analysis indicated that the time spent on the swap over activities could be reduced. This operator set a realistic goal of reducing 10 minutes per swap-over interval. Within one pad, the goal was reached utilizing this method, resulting in reducing 15 hours from the total pad time.
The presented method provides an automated overview of fracturing operations. Based on the analysis, timely decisions can be made to reduce operational costs. Moreover, because this method is automated, it is not limited to single well operations but can handle multi-well pad completion designs that are commonplace in unconventionals.