bluuebunny/crossref_metadata_2025_split huggingface dataset:
Post-Covid Media Behaviour Patterns of the Generation Z Members in Slovakia
Authors: Lesková Andrea , Lenghart Patrik 
Published: June 2023

Aim. The aim of the article is to identify and describe internet-consumption behavioral patterns that have been common after the Covid-19 restrictions have been lifted.
Concept. In July 2022, we conducted a quantitative research based on an online survey in which 800 members for the Slovak Generation Z participated.
Results. The results indicate a notable decrease in the quantity of time the Slovak Generation Z members spend daily online, when compared to the time of the Covid-19 pandemic, but the average daily time spent online never returned to the numbers typical for the pre-Covid times.
Conclusion. Our data are an asset to the general knowledge base about the Slovak Generation Z internet-consumption behavioral patterns, but they are also specifically relevant for the disciplines of marketing, and mass-media communication, that view the Generation Z cohort as a part of the global audience.
Cognitive value. The article contributes to the growing knowledge-base about the internet-consumption behavioral patterns of the (Slovak) Generation Z, and as such could be valuable for building theories about this part of the audience between the years 2020 and 2030, which will be a pivotal time for the development of marketing, internet and mass-media communication and the changes that will occur along with the change of the dominant position from the Generation Y to Generation Z, when it comes to the influence on the world’s mass-media markets, but also in other segments.
The Discourse of Daily Life during the War: the 2022 Ukrainian Projection
Authors: Klymanska Larysa , Klimanska Maryna , Haletska Inna 
Published: June 2023

Aim. To define and describe the positions of Ukrainians in their attitude to the war on Russia and reflection of this attitude in the discourse of daily life in wartime.
Concept/Methods. 25 transcripts of semi-structured interviews subjected to thematic analysis. Relying on the categories identified through thematic analysis, the criteria differentiating the attitude of Ukrainians to the war, viz. personalization/depersonalization, media practice of content consumption, assessment of the so called “we-they-relationship”, reflection on the changes in daily life, the process of adaptation to changes, ideas of exemplary behavior were established.
Results and conclusion. The analysis of the results enabled to outline the problematic field of assessment of the attitude of Ukrainians to the full-scale war on Russia and reflection of this attitude in the discourse of daily life in wartime. Relying on the criteria differentiating this attitude, three typical positions in the attitude of Ukrainians to the war were outlined – that of external observer, optimistic fatalist, and rational optimist.
Practical application. Clarification of the specific characteristics of the attitude of Ukrainians to the war and perception of the enemy under such circumstances enables to envisage the public opinion response to certain decisions related to the full-scale Russian invasion of Ukraine, to plan communication campaigns promoting volunteer movement with due account of different positions taken by Ukrainians as well as to determine the degree of psycho-traumatizing of individuals in the crisis situation of war via discourse.
Originality/Cognitive value. The study was conducted in October-November 2022, on the ninth month of the full-scale Russian invasion of Ukraine, and it reflects the thoughts of Ukrainian civilians concerning the war, its reasons, collective responsibility of Russians, and, finally, changes occurring in the life of the country and every individual, the process of adaptation to this complex situation. The use of quality methods (semi-structured interview) for the study ensured focusing on subjective peculiarities of the perception of war and daily life during in wartime.
Conclusions: The typology of ideas, types of attitude of Ukrainians to the reality of war requires verification and further specification within a quantitative study aimed at clarification of quantitative figures representing the prevalence of the established positions.
A simple estimation of the longevity gap and redistribution in the pension system
Authors: Simonovits András , Lackó Mária 
Published: June 2023

AbstractIt has been known for decades that in a given year and in a given country, with the rise in lifetime income, life expectancy also rises. The difference between the richest and the poorest stratas' life expectancies is called the longevity gap. Recently, as the gap has generally been growing, it has received more and more attention. The issue is important in itself, but it has also an obvious impact on redistribution in the pension system: the greater the longevity gap, the greater is the redistribution from the low benefit pensioners to the high benefit ones in a given pension system. Econometrically estimating the life expectancy-income function may help the analysis. In our short study, first we give a simple estimation, and then we show the influence of the estimate on the redistribution.
Determinants of domestic value added in exports of the EU countries
Authors: Kittová Zuzana , Steinhauser Dušan , Drieniková Kristína 
Published: June 2023

AbstractEconomies, including the European Union, face the risk of losing ability to maintain their competitive positions on the global scale and of related inability to generate value added up to satisfactory degree. We therefore examine factors assumedly having positive impact on the domestic value added in exports, as a recently introduced key indicator of country's export competitiveness, reported in the TiVA database. The main aim of our paper is to test, for the selected countries, the relationships of the domestic value added in exports with the following factors: (1) number of patent applications per million inhabitants, (2) foreign direct investment per capita, (3) business expenditure on research and development as a percentage of GDP and (4) resource productivity as control variable. We prove by panel data analysis that the domestic value added in exports increases with an increase in all deployed independent variables as well as in control variable.
Spatiality in freight transport efficiency
Authors: Boldizsár Adrienn , Mészáros Ferenc , Sipos Tibor 
Published: June 2023

AbstractThe relationship between economic growth and transport sector is an important and popular topic for researchers, but it also has several untapped areas. To ensure continuous economic growth, it is necessary to answer how and to what extent economic sectors contribute to sustainability; what factors or sets of factors can determine freight performance in a country or region; and how it affects the global economy. This study aims to test the presence of spatial dependence. In this research, the authors looked for the spatial relationships between economic activity (GDP) and freight transport performance using spatial econometric models. The results showed that the spatial impact of freight transport performance and GDP significantly influence each other. The intensity calculation shows that the Baltic States have a high intensity in road freight transport, followed by the Central European region. Eastern Europe, including Russia and the Baltics, are prominent players in rail freight. Furthermore, the spatial econometric models have highlighted that a country with high GDP has some sort of "suction" effect on neighbouring countries with lower GDP along with the freight performance. This is especially true for rail freight. In the long run, the outlined results may even support strategic decision-makers in managing the economic impacts of both road and rail freight transport at the regional level.
Ten-Year Outcomes of Second-Generation, All-Inside Meniscal Repair in the Setting of ACL Reconstruction
Authors: Wright Rick W. , Huston Laura J. , Haas Amanda K. 
Published: June 2023

Background:
Meniscal repair is the goal, whenever possible, for the treatment of meniscal injury. The purpose of this study was to evaluate the long-term clinical success of meniscal repair performed with a second-generation, all-inside repair device with a concomitant anterior cruciate ligament (ACL) reconstruction.

Methods:
This was a retrospective review of prospectively collected patients who underwent meniscal repair by a single surgeon using the all-inside FAST-FIX Meniscal Repair System (Smith & Nephew) in conjunction with a concurrent ACL reconstruction. Eighty-one meniscal repairs (81 patients) were identified: 59 medial repairs and 22 lateral repairs. Clinical failure was defined as repeat surgical intervention involving resection or revision repair. Clinical outcomes were assessed with the Knee injury and Osteoarthritis Outcome Score (KOOS), International Knee Documentation Committee (IKDC) score, and Marx Activity Rating Scale score.

Results:
Ten-year follow-up was obtained for 85% (69) of 81 patients. Nine patients (13% of 69) underwent a failed meniscal repair (6 medial, 3 lateral), corresponding to a failure rate of 12% (6 of 50) for medial repairs and 16% (3 of 19) for lateral repairs. The mean time to failure was 2.8 years (range, 1.2 to 5.6 years) for the medial repairs and 5.8 years (range, 4.2 to 7.0 years) for the lateral repairs (p = 0.002). There was no difference in mean patient age, sex, body mass index, graft type, or number of sutures utilized between successful repairs and failures. Postoperative KOOS and IKDC outcome scores significantly improved over baseline scores (p < 0.001). There was no significant difference in patient-reported outcomes at 10 years between the group with successful repairs and those who had a failed repair.

Conclusions:
This report of long-term follow-up results of primary second-generation, all-inside meniscal repair demonstrates its relative success when it is performed with concurrent ACL reconstruction. After a minimum follow-up of 10 years, 84% to 88% of the patients continued to demonstrate successful repair. Failure of medial meniscal repairs occurred significantly earlier compared with lateral meniscal repairs.

Level of Evidence:
Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
Multifunctional Biosurfactants with Unusual pH Sensitive Interfacial Behavior for Remediation of Iron and Zinc Sulfide Formation Damage
Authors: Au Yong Hin Cheong , Tooker Kortney , Van Pham Khanh , Arriaga Richard , Mahmoudkhani Amir 
Published: June 2023

Abstract
Metal sulfide scales are found in several fields in onshore and offshore oil and gas wells around the world. Although there has been some success in the development of sulfide scale inhibitors, significantly high concentration of inhibitor is often required specially to mitigate zinc sulfide. Microbial biosurfactants have an inherent affinity towards different mineral surfaces including sulfides. The unique surface and interfacial properties of these naturally derived products make them potential candidates for development of new products for metal sulfide scale management and control. In this work the properties of sophorolipids and rhamnolipids as dispersion and modification agents for iron and zinc sulfide precipitates were investigated. Surface and interfacial tension behaviors of microbial biosurfactants were measured using a drop shape tensiometer. Accelerated dispersion stability testing were used to determine the efficiency of biosurfactants for dispersing field collected and lab-made iron and zinc sulfides. Fourier transform – infrared (FTIR) and ultraviolet – visible (UV-vis) spectroscopy was used to determine the mode of interaction of the biosurfactant active sites with metal sulfide surfaces.
A Novel Green Friction Reducer That Helps to Achieve the Goals of ESG Standards
Authors: Siddiqui Farhan , Emrani Arezoo 
Published: June 2023

Abstract
Large volumes of treatment fluid are required to contact an adequate surface area of shale formations for the economic production of hydrocarbons. These large-volume fracturing treatments are accomplished by pumping at very high down-hole rates to create adequate fracture volume and for sufficient proppant transportation. Polyacrylamide-based friction reducers (FR) are implemented to minimize the friction in the wellbore in shale/tight reservoirs for stimulation and drilling processes. They reduce turbulence and decrease friction losses. However, these polyacrylamide-based friction reducers are limited by poor water quality tolerance, which negatively affects proppant carrying capacity.
This work aims to introduce a novel formula for a green friction reducer, which will serve to both decrease costs and enhance retained conductivity. The new technology described in this paper is used to produce a friction reducer that helps to achieve the goals of Environmental, Social, and Governance (ESG) standards. Similar to guar gum, the new friction reducer can be utilized as a linear gel, or it can be crosslinked to enhance its viscosity, making it ideal for proppant transportation and the protection of surface equipment. It is worth noting that the presence of iron in water can have an adverse effect on the rheology and friction of both conventional and high viscosity friction reducers (HVFR).
The research findings demonstrate the proposed product's effectiveness, even in water containing exceptionally high concentrations of ferric iron (Fe+3). The study presents the results of employing a new friction-reducing polysaccharide that achieves comparable friction reduction to that of a polyacrylamide friction reducer while also enabling proppant suspension, akin to a crosslinked guar system. This innovative system is versatile and can be used with both fresh and saline water with high concentration of divalent and trivalent metal ions. This feature allows the operator to use any water source, thereby streamlining water analysis procedures before commencing a frac job. Results also show that the new product can produce less nitrogen compared to synthetic polymers which means that it can achieve ESG standards. The novel FR gives excellent retained permeability on cores when compared to guar gum and its derivatives.
Experimental outcomes of this work also show that the new formulation can be broken by both oxidizing and enzyme breakers. Results show that the new friction reducer is biodegradable and environmentally friendly. Moreover, the use of the novel product will decrease the production of CO2 as compared to conventional FRs.
A Review of 50 Years of SPE Oilfield Chemistry
Authors: Silva Celia , Hull Katherine , Beteta Alan , Sorbie Ken , Mackay Eric 
Published: June 2023

Abstract
This paper reviews the past 50 years of the SPE Oilfield Chemistry Conference to understand how the event and papers published at it have evolved, what function does the conference serve today, and what future trends should the oilfield chemistry community anticipate and adapt towards.
All the papers from the 26 conferences run by the SPE since 1973 have been collated and analyzed for data such as topic, keywords, authorship (and number of authors), number and type of organizations involved, and number of citations (to 2022 Q4). The data are plotted to enable analysis of the evolution of trends over time. In addition, professionals in the earlier, mid and later stages of their careers contribute their perspectives on the conference content and what benefits they derive from participation.
Over the years the number of topics has expanded, as have the number and range of contributors. For example, in the first year of the conference (1973) there were 12 papers on 8 topics, written by 23 authors, averaging 2 authors per paper. In the most recent year (2021), there were 68 papers on 11 topics, with an average of 4.8 authors per paper. For a majority (7 out of 12) papers in 1973 the lead authors were from academia, with only one paper from an operator, whereas by 2021 there was a more balanced spread, with 37% papers led by universities/research institutes and the remainder well distributed amongst operators, service companies and chemical manufacturers. While the overall number of topics and papers has expanded over 50 years, some topics have appeared and then disappeared, and others have made a comeback. Indeed, for six conferences between 1977 and 1985, the word "geothermal" was included in the conference name, before being dropped again. In 1973, the paper contributed by an operating company was cited 8 times more than all the other 11 papers put together, whereas 85% of the citations at the following conference are associated with six university authored papers.
Much has changed in the past half century, and yet some of the papers from the early years remain very relevant today, and will undoubtedly impact how we address future challenges. The oil and gas industry has been challenged to engage with the Energy Transition: we show that the technologies and information introduced at this conference are and will be at the forefront of the emerging energy production landscape.
Physicochemical Phenomena of Diffusion Relaxation: Experimental Results and Application for Acid Stimulation Operations
Authors: Ivanishin Igor , Kudrashou Viacheslau 
Published: June 2023

Abstract
Accurate prediction of the rock dissolution process is crucial for designing efficient acid stimulation treatments. At typical conditions, the dissolution of carbonates in most acids is limited by the rate of convective diffusion of reactive species to the surface of the rock. The experimental techniques used to determine the acid-diffusion coefficient are comparably well-understood by the research and engineering community. However, one important physicochemical phenomenon termed diffusion relaxation has not been studied in detail and accounted for in all the existing acid fracturing and matrix acidizing modeling software programs. The objective of this work is to address these gaps in research and optimize acid treatment designs. Diffusion relaxation occurs downstream of an inert or less reactive rock layer and results in higher mass transfer, i.e., dissolution rate of the rock located immediately downstream of an inert layer. To study the process of diffusion relaxation, 15 wt% hydrochloric acid at a temperature of 150°F was injected through a composite acid fracture model. This model was prepared by inserting 0.5 and 0.25 in.-long sandstone layers into a standard 7 in.-long fracture model made of Indiana limestone. Laser profilometry of the fracture surfaces after the experiment revealed the presence of 0.1 in.-deep channels of more etched limestone downstream of inert layers, as compared to the upstream of inert layers. The zone of an enhanced dissolution rate—termed diffusion relaxation zone—extends to a distance comparable to the length of an inert layer and appears because of the following. As soon as the acid flow encounters inert areas, the concentration of reactive species at the fracture surface starts to accumulate since there is no dissolution reaction. Right downstream the inert areas, the limestone surface contacts with the acid that has not been spent by the diffusion of reactive species. Because of that and an impact of tangential mass transfer in the diffusion boundary layer, downstream of inert areas the diffusional mass transfer significantly—often more than two times—exceeds the limiting mass transfer established upstream of the inert areas. Etched channels formed in diffusion relaxation zones contribute to the fracture conductivity, which is not considered in existing modeling software programs. Results indicate that the observed phenomenon is universal, i.e, it also occurs during dissolution of rocks with different reactivities. This research innovatively discusses the impact of physicochemical phenomena of diffusion relaxation on the dissolution of carbonate rocks, and formation of conductive flow channels. Presented results are integral for designing acid stimulation operations.
Kinetic Experimental and Modeling Evaluations of Asphaltene Morphology and Growth Rate under Varying Temperature and Brine Conditions
Authors: Quainoo Kwamena Ato , Abdulmohsin Imqam , Borecho Bavoh Cornelius 
Published: June 2023

ABSTRACT
The utilization of predictive mechanisms to resolve asphaltene precipitation during oil production is a cleaner and less expensive means than the mechanical/chemical remediation techniques currently employed. Existing models lack predictive success due to opposing views on temperature-asphaltene precipitation interactions. In this study, the effect of varying temperatures (40, 50, 60, 70 80 and 90 °C) and brine concentrations (0 – 5 wt.%) on the long-time kinetics of asphaltene precipitations was evaluated. A series of experiments were conducted using the filtration technique and the confocal microscopy to study asphaltene precipitation on a model oil system consisting of asphaltenes, a precipitant, and a solvent. Furthermore, the Avrami modeling technique was employed to predict the morphology, and growth rate of the precipitating asphaltenes. The experimental results suggested that temperature significantly affects asphaltene precipitation including imparting its precipitation mechanism with a cross-behavioral pattern. Asphaltene precipitation in the system displayed an initial fast kinetics upon increasing temperature. The fast kinetics observed in the early times is due to the increasing dipole-dipole interactions between asphaltene sub-micron particles stimulated by increased temperature. However, the pattern changes into slower precipitations as the time progresses upon continuous heating of the reservoir fluid. The reason is the increased solubility of the asphaltenes imparted into the model oil system upon further increments in temperature. The presence of brine in the model-oil system also enhanced the rate and precipitation of asphaltenes. The experimental data were further analyzed with the Avrami crystallization fitting model to predict the formation, growth, morphology, and growth geometry of the precipitating asphaltenes. The Avrami model successfully predicted the asphaltene morphologies, growth rates and the crystal growth geometries. The growth geometries (rods, discs, or spheres) of the asphaltenes in the model oil systems upon temperature increments, ranged from 1.4 – 3.5. These values are indicative that temperature impacts the growth process of asphaltenes in the model system causing variations from a rod-like sporadic process (1.0 ≤ n ≤ 1.9) to a spherical sporadic growth process (3.0 ≤ n ≤ 3.9). This work precisely emphasizes the impact of temperature on asphaltene precipitations under long kinetic time, thus, providing a clear pathway for developing successful kinetic and thermodynamic models capable of predicting asphaltene precipitation reliably. The accurate prediction of asphaltene precipitation will eliminate the need for the use of harmful remediation solvents like benzene/toluene/ethylbenzene/xylene (BTEX). This study is therefore a critical step in the right direction to achieving accurate predictive model evaluations of asphaltene precipitations.