bluuebunny/crossref_metadata_2025_split huggingface dataset:
Market study on parents’ demands regarding sports choices for their children
Authors: Strava Cristian-Cosmin 
Published: April 2021

Abstract

Introduction:The field of sports nowadays experiences a continuous development, both from the sports performance and social perspective, transitioning from a free time activity to a complex industry. On this growth trend where more and more people practice sports a large sports services market has developed, which brought a new applicability for marketing in this area of consumption.
The efficiency of a new marketing policy with regard to a sports entity depends on the importance given to consumer’s needs. By studying the consumer’s behavior one understands identifying the ways the consumer comes to a decision when deciding how to spend available resources (time, money, effort) in the acquisition and consumption process.

Aim: Sports clubs, especially the private ones, are in a continuous competition on the sports services market, we decided to identify the demand and needs of parents in Timisoara when it comes to choosing a sports activity for their children.

Methods:We obtained the information necessary for carrying out this market study based on a questionnaire. The research took place in Timisoara throughout the year 2016, and a number of 217 parents having children that were enrolled in seven different private sports clubs were included in the study, our target being sports games.

Results:The results help in highlighting the needs and demand of sports consumers, offering information about the amount of money parents are willing to pay, the number of weekly training sessions, the day and location for the activities, the best advertising etc. With these data we hope that sports managers can implement new marketing strategies, having a more detailed vision on the target group.
From the Roots to the Present of Personal Financial Planning – Achievements on the 50th Anniversary of the Movement
Authors: Waliszewski Krzysztof , Welch H. Oliver 
Published: April 2021

The purpose of the article The aim of the article is to present the reasons for the emergence of personal and financial planning in the 1960s in the US, and then its quantitative and qualitative evolution around the world, taking into account institutional aspects.
Methodology Review of the literature on the subject, legal acts and statistics of the financial advisory movement.
Results of the research The study found that personal financial planning emerged from a grassroots initiative as a response to the needs of consumers and progressive representatives of the financial sector. Its territorial expansion beyond its homeland was associated with a growing awareness of the benefits of financial advisory services to households. Before the entire financial planning movement there is enormous growth potential.
Dodatek kwartalny
Authors: Baczmaga Rafał , Braciak Marta , Skrzypecki Antoni , Uryszek Tomasz , Witczak Radosław 
Published: April 2021

"Sytuacja gospodarcza w Polsce po III kwartale 2016 r."
"Oceny ratingowe Polski"
"Zmiany w świecie podatków na rok 2017"
THE CALCULATION SYSTEM OF NUMBER OF PEOPLE IN A ROOM BASED ON HUMAN DETECTION USING HAAR-CASCADE CLASSIFIER
Authors: Atmaja Gusti Ngurah Rama Putra , Usman Koredianto , Murti Muhammad Ary 
Published: April 2021

Data of number of people in the room, calculations are usually carried out by assigning someone to oversee a room. In this final project, a system for calculating the number of people in the room is designed with image processing based on human detection that can be used in rooms, both for commercial applications and for security. This system uses Raspberry Pi device that already has an image processing method Haar-Cascade Classifier. Input data is in the form of video taken directly via webcam to be captured into a frame so that it can be used as a input the Haar-Cascade Classifier method and perform the counting process will be sent to the Antares platform. The system design has been tested with five scenarios. Scenario 1 the effect of the distance of the object, scenario 2 the effect of the pose of the object, scenario 3 the effect of the amount the object in the frame, scenario 4 affects the scale factor and scenario 5 measurement computation time. Scenarios 1 to 3 will do the best configuration for minimum neighbour. The system gets the best accuracy of 98,5% when the object distance 4 meters, the best accuracy of 96,6% when the object is facing forward and accuracy the best is 97,7% when the object in the frame is more than two objects with the best configuration use the minimum neighbour 5. Scenario 4 gets accuracy the best is 76,2% when using the scale factor 1.1. Scenario 5 gets the average computation time of the system is under one second, meaning the detection process done pretty fast.
Evolution of Microstructure and Mechanical Properties of Nanostructured NiFe Films under Influence of Heat Treatment
Authors: Fedosyuk V. M. 
Published: April 2021

. Nanostructured NiFe films were synthesized by pulsed electrolytic deposition on silicon with a gold sublayer, after which they have been subjected to to temperature treatment at 373-673 K in order to study the effect of heat treatment on the microstructure and mechanical properties of the objects under study. High-resolution atomic force microscopy has made it possible to trace the stages of microstructure evolution under the influence of heat treatment, including the process of nonlinear increase in grain growth and two-stage agglomeration. It is shown that with an increase in heat treatment temperature to 673 K, the grain size increases from 68 to 580 nm in comparison with the initial sample, undergoing agglomeration processes at temperatures of 100 and 300 °C. The mechanical properties of nanostructured NiFe films have been studied by the nanoindentation method. The dependences of the hardness of Young’s modulus and the values of the resistance to elastoplastic deformation on depth have been obtained and analyzed in the paper. This approach has permitted to reveal differences in the behavior of the mechanical properties of the surface layer and the internal volume of the film under the action of different heat treatment temperatures, as well as to demonstrate the opposite reaction of different material layers to an increase in temperature. As a result of a thorough analysis of the deformation curves of nanoindentation, it has been found that the homogenization of the surface in combination with the activation of oxidation processes leads to the strengthening of near-surface layer of NiFe films. At the same time, the internal volume of the material is characterized by a nonlinear decrease in hardness and Young’s modulus with an increase in the heat treatment temperature. The explanation for this phenomenon has been found in the complex effect of a decrease in the number of grain boundaries (due to an increase in the average grain size with increasing temperature) and an increase in the concentration of gold atoms diffusing from the sublayer more actively with an increase in the processing temperature of NiFe films.
Influence of the Cut Axial Depth on Surface Roughness at High-Speed Milling of Thin-Walled Workpieces
Authors: Germashev A. I. , Logominov V. A. , Dyadya S. I. , Kozlova Y. V. , Krishtal V. A. 
Published: April 2021

The paper presents the results of research on the dynamics of end milling of thin-walled work-pieces having complex geometric shapes. Since the milling process with shallow depths of cut is characterized by high intermittent cutting, the proportion of regenerative vibrations decreases, and the effect of forced vibrations on the dynamics of the process, on the contrary, increases. The influence of axial depth of cut on the vibrations arising during processing, and roughness of the processed surface have been studied in paper. The experiments have been carried out in a wide range of changes in the spindle speed at different axial cutting depths. Vibrations of a thin-walled work-piece have been recorded with an inductive sensor and recorded in digital form. Then an oscillogram has been used to estimate the amplitude and frequency of oscillations. The profilograms of the machined surface have been analysed. Roughness has been evaluated by the parameter Ra. The results have shown similar relationships for each of the investigated axial cutting depths. The worst cutting conditions have been observed when the natural vibration frequency coincided with the tooth frequency or its harmonics. It is shown that the main cause of vibrations in high-speed milling is forced rather than regenerative vibrations. Increasing the axial depth of cut at the same spindle speed increases the vibration amplitude. However, this does not significantly affect the roughness of the processed surface in cases when it comes to vibration-resistant processing.
Understanding Real-Time Job Signatures on Deepwater Cementing Jobs with Dynamic Losses
Authors: Dooply Mohammed , Schupbach Michael , Hampshire Kenneth , Contreras Jose , Flamant Nicolas 
Published: April 2021

Summary
Two of the most important parameters to monitor during a primary cementing job are the flow rate in and return flow rate measurements. To achieve optimum job results of a primary cementing job, measuring annular return rates and comparing them with simulated data in real time will provide a better understanding of job signatures and result in the best possible top of cement (TOC) estimation prior to running any cement evaluation log or making a decision to continue drilling the next section of the well.
The return rate job signature along with the wellhead pressure is essential to understanding the behavior and discrepancies between simulated and acquired surface data. Therefore, to assess the risk of job issues, such as unsuspected washout and lost circulation among others, accurate measurements of the return rate are critical.
Historically, the cement job evaluation has been limited by the fact that most drilling rigs do not have an accurate flowmeter installed on the annulus return line, and a simple verification of mud tanks volume vs. pumped volume, as reported by drillers or mud loggers, more often than not results in an unreliable assessment of the volume lost downhole, due to the unfamiliarity with the U-tubing effect and lack of data consolidation from the cement unit (flow rate in) and the rig (flow rate in and flow rate out).
In this paper, we will review a solution developed to mitigate the lack of a direct flow-rate measurement by computing and displaying the return rate using either a paddle meter measurement or the derivative over time of the volume observed in the rig tanks.
West Africa Salt-Zone Cementing Best Practices: Laboratory Evaluation and 5-Year Field Application Review
Authors: Nana Degaul , Uba Christopher , Johnson Carl , Lonca Matthieu , Zghal Jamel 
Published: April 2021

Summary
To determine which salt-based cement system (potassium chloride or sodium chloride) was suitable for cementing across halite and anhydrite salt sections in West Africa, eight slurry recipes were tested to assess how formation salt contamination would affect slurry properties. The formation salt used for testing was sampled from a deepwater, presalt well in Angola. The recommendations developed from the laboratory study were implemented in 10 projects across West Africa over 5 years with 100% operational and well integrity success.
A candidate deepwater well was selected in which the surface and intermediate strings penetrated salt formations. Four slurry designs (a lead and tail slurry used on each casing string) were programmed. Each slurry was designed and tested as two distinct systems using potassium chloride and sodium chloride salt, respectively, yielding a total of eight slurry designs. Using the methodology and data presented by Martins et al. (2002), the mass of dissolved formation salt that each slurry may receive during placement was estimated and duly incorporated into each slurry design. Subsequently, the salt-contaminated slurries were tested and compared with the properties of the initial uncontaminated slurries. On the basis of these results, conclusions were then made on which salt slurry system (potassium chloride or sodium chloride) exhibited better liquid and set properties after contamination with formation salt. Subsequently, this knowledge was applied to 10 projects across three countries in West Africa.
This study showed that when the contact time of liquid cement slurry to salt formation was low—typically when the salt-formation interval across which the cement slurry flowed was less than 100 m thick—the level of formation salt dissolution entering the slurry during placement was limited. In this case, a potassium chloride salt-based slurry delivered improved liquid and set properties as compared with a sodium chloride salt-based slurry. In the field, this knowledge was applied in all oilfield projects cemented by an oilfield service company between 2015 and 2020. This included deepwater, shallow offshore, and onshore wells. All related salt-zone cement jobs, including sidetrack plugs, placed across the salt formations were successful on the first attempt.
In an absence of industry consensus around salt-formation cement slurry design, this paper validates a guideline for West Africa, based on results from laboratory testing and 5 years of field application. In contrast to current literature that recommends only sodium chloride salt-based slurry designs across halite or anhydrite salt intervals, this work demonstrates that potassium chloride salt-based slurry systems can effectively be used to achieve well integrity where a halite or anhydrite salt interval is less than 100 m (328.1 ft) thick.
Interaction between Hydraulic Fracture and Pre-Existing Fracture under Pulse Hydraulic Fracturing
Authors: Wei Chao , Zhang Bo , Li Shucai , Fan Zhixin , Li Chengxin 
Published: April 2021

Summary
Pulse hydraulic fracturing technology can greatly improve the effect of fracture propagation in rock and form complex fracture networks in reservoirs. The interaction mechanism between hydraulic fractures and pre-existing fractures under pulse hydraulic pressure is unclear. The induced laws of pre-existing fractures on the propagation direction of hydraulic fractures under different pulse frequencies and pulse hydraulic pressures are revealed in this work.
We have carried out traditional hydraulic fracturing (THF) tests and pulse hydraulic fracturing tests with rock-like specimens. We compared the interaction between hydraulic fractures and pre-existing fractures in the two hydraulic fracturing tests. Acoustic emission (AE) characteristics of the interaction between hydraulic fractures and pre-existing fractures during pulse hydraulic fracturing are analyzed.
The results show that pre-existing fractures in the rock-like specimen can induce the direction of propagation of hydraulic fractures. The influence of pre-existing fracture tips on hydraulic fracture propagation is greater with low pulse frequencies than with traditional hydraulic pressures and high pulse frequencies. When the pulse frequency is 1 Hz, hydraulic fractures are easily induced by pre-existing fracture tips. With increasing pulse frequency, the hydraulic fracture propagation direction gradually moves away from the pre-existing fracture tips and extends perpendicularly to the direction of the minimum principal stress. Under pulse hydraulic loading, more hydraulic fractures are generated around the wellbore than under THF and extend to the pre-existing fracture, and more hydraulic fractures around the wellbore are created with low-frequency pulse loading than with high-frequency pulse loading. Compared with traditional hydraulic pressures, hydraulic fracture propagation with low pulse frequencies (1 and 3 Hz) is more complex than hydraulic fracture propagation with traditional hydraulic pressures and high pulse frequencies (5 Hz). Under high pulse hydraulic pressure and pulse frequency, hydraulic fractures easily extend along the direction perpendicular to the direction of the minimum principal stress like propagation under traditional hydraulic pressure. The study of the interaction mechanism between hydraulic fractures and natural fractures under pulsating hydraulic pressure can provide a method for the formation of fracture network systems in large-scale fracturing and may improve the fracturing efficiency.
Full Reproduction of Surface Dynamometer Card Based on Periodic Electric Current Data
Authors: Zhu Dandan , Luo Xiaoting , Zhang Zhanmin , Li Xiangyi , Peng Gao , Zhu Liping , Jin Xuefeng 
Published: April 2021

Summary
The surface dynamometer card is composed of ground load and ground displacement, which is of great significance to reflect the operation of rod pumping and the exploitation of crude oil. However, the current method of obtaining the surface dynamometer by sensors is a huge financial investment on the sensor installations and maintenance. In this paper, we propose an innovative method based on deep learning to reproduce the surface dynamometer card directly from electrical parameters. In our method, the convolution neural network is used as the basic layer to automatically extract the spatial characteristics of input data. A long short-term memory (LSTM) network as the core component is used for the output layer to consider the time dependence of the dynamometer card. Finally, the experimental shows that the proposed method achieves the mean relative error (MRE) of 4.00% on the real oil well data in A-oilfield, and the dynamometer card calculated by our model is basically consistent with the field data. In addition, the method has been tested in new wells with a rod pumping system, and the results show that the accuracy of the model is close to 90%, which has already greatly outperformed the previous methods.
Microbiomes attached to fresh perennial ryegrass- are temporally resilient and adapt to changing ecological niches
Authors: Huws Sharon , Edwards Joan. E. , Lin Wanchang , Rubino Francesco , Alston Mark , Swarbreck David , Caim Shabhonam , Stevens Pauline Rees , Pachebat Justin , Won Mi-Young , Oyama Linda B. , Creevey Christopher J. , Kingston-Smith Alison H. 
Published: April 2021

Abstract
BackgroundGut microbiomes, such as the rumen, greatly influence host nutrition due to their feed energy-harvesting capacity. We investigated temporal ecological interactions facilitating energy-harvesting at the fresh perennial ryegrass (PRG)-biofilm interface in the rumen using an in sacco approach and prokaryotic metatranscriptomic profiling. ResultsNetwork analysis identified two distinct sub-microbiomes primarily representing primary (<4h) and secondary (>4h) colonisation phases and the most transcriptionally active bacterial families (i.e Fibrobacteriaceae, Selemondaceae and Methanobacteriaceae) did not interact with either sub-microbiome, indicating non-cooperative behaviour. Conversely, Prevotellaceae had most transcriptional activity within the primary sub-microbiome (focussed on protein metabolism) and Lachnospiraceae within the secondary sub-microbiome (focussed on carbohydrate degradation). Putative keystone taxa, with low transcriptional activity, were identified within both sub-microbiomes, highlighting the important synergistic role of minor bacterial families, however, we hypothesise that they may be ‘cheating’ in order to capitalise on the energy-harvesting capacity of other microbes. In terms of chemical cues underlying transition from primary to secondary colonisation phases, we suggest that AI-2 based quorum sensing plays a role, based on LuxS gene expression data, coupled with changes in PRG chemistry. ConclusionsIn summary, we show that fresh PRG-attached prokaryotes are resilient and adapt quickly to changing niches. This study provides the first major insight into the complex temporal ecological interactions occurring at the plant-biofilm interface within the rumen. The study also provides valuable insights into potential plant breeding strategies for development of the utopian plant, allowing optimal sustainable production of ruminants.
Molecular Pathology Testing for Non-small Cell Lung Cancer: An Observational Study of Elements Currently Present in Request Forms and Result Reports and The Opinion of Different Stakeholders
Authors: Dufraing Kelly , Casteren Kaat Van , Breyne Joke , D'Haene Nicky , Campenhout Claude Van , Borght Sara Vander , Zwaenepoel Karen , Rouleau Etienne , Schuuring Ed , Thüsen Jan von der , Dequeker Elisabeth 
Published: April 2021

Abstract
BackgroundFor patients with non-small cell lung cancer (NSCLC), targeted therapies are becoming part of the standard treatment. It is of question which information the clinicians provide on test requests and how the laboratories adapt test conclusions to this knowledge and regulations.MethodsThis study consisted of two components; 1) checking the presence of pre-defined elements (administrative and key for therapy-choice) on completed requests and corresponding reports in Belgian laboratories, both for tissue- and liquid biopsy (LB)-testing and b) opinion analysis from Belgian pathologists/molecular biologists and clinicians during national pathology/oncology meetings. ResultsData from 4 out of 6 Belgian laboratories with ISO-accreditation for LB-testing were analyzed, of which 75% were university hospitals. On the scored requests (N=4), 12 out of 19 ISO-required elements were present for tissue and 11 for LB-testing. Especially relevant patient history, such as line of therapy (for LB), tumor histology and the reason for testing were lacking. Similarly, 11 and 9 out of 18 elements were present in the reports (N=4) for tissue and LB, respectively. Elements that pathologists/molecular biologists (N=18) were missing on the request were the initial activating mutation, previous therapies, a clinical question and testing-related information. For reporting, an item considered important by both groups is the clinical interpretation of the test result. In addition, clinicians (N=28) indicated that they also wish to read the percentage of neoplastic cells. ConclusionsCommunication flows between the laboratory and the clinician, together with possible pitfalls were identified. Based on the study results, templates for complete requesting and reporting were proposed.
HGF and CXCL13, Two Antagonizing Cytokines in Lung Inflammation and Fibrosis, Predict the Severity and the Mortality of COVID-19
Authors: Perreau Matthieu , Suffiotti Madeleine , Marques-Vidal Pedro , Wiedemann Aurelie , Levy Yves , Laouénan Cédric , Ghosn Jade , Fenwick Craig , Comte Denis , Roger Thierry , Regina Jean , Vollenweider Peter , Waeber Gerard , Oddo Mauro , Calandra Thierry , Pantaleo Giuseppe 
Published: April 2021

Abstract
The objective of the present study was to identify biological signatures of severe COVID-19 predictive of admission in the intensive care unit (ICU). Over 170 immunological markers were investigated in a ‘discovery’ cohort (n=98 patients) of the Lausanne University Hospital (LUH-1). While cellular immunological markers lacked power in discriminating between ICU and non-ICU patients, 13 out of 49 cytokines were significantly associated with ICU admission in the three cohorts (P<0.05 to P<0.001). The cytokine results were confirmed in two ‘validation’ cohorts, i.e. the French COVID-19 Study (FCS; n=62) and a second LUH-2 cohort (n=47). Of note, HGF is a pleiotropic cytokine with anti-inflammatory properties playing a fundamental role in lung tissue repair, and CXCL13, a pro-inflammatory chemokine associated with pulmonary fibrosis and regulating the maturation of B cell response. The two cytokines in combination were the best predictors of ICU admission (positive and negative predictive values ranging from 81.8% to 93.1% and 85.2% to 94.4% in the 3 cohorts) and occurrence of death during patient follow-up (8.8 fold higher likelihood of death when both cytokines were increased). Up-regulation of HGF reflects the most powerful counter-regulatory mechanism of the host immune response to antagonize the pro-inflammatory cytokines including CXCL13 and to prevent lung fibrosis in COVID-19 patients.