bluuebunny/crossref_metadata_2025_split huggingface dataset:
Usługi publiczne w czasie pandemii COVID-19. Analiza z uwzględnieniem specyfiki świadczenia usług niematerialnych
Authors: Behr Jolanta 
Published: March 2022

Pandemia COVID-19 jest jedną z wielu pandemii, z którymi ludzkość będzie musiała się zmierzyć w nieodległym czasie. Wywiera ona wpływ na funkcjonowanie podmiotów publicznych i stosunki społeczne. Jednym z obszarów najbardziej dotkniętym jej skutkami są usługi niematerialne, których świadczenie należy do głównych zadań związków publicznoprawnych, czyli jednostek samorządu terytorialnego. Sposób i zakres świadczenia usług publicznych uległ istotnej zmianie. Z powodu ryzyka wystąpienia kolejnych pandemii, ważne jest zidentyfikowanie jak największej liczby problemów i wyzwań związanych z tą sferą oraz wypracowanie skutecznych ich rozwiązań, aby podmioty publiczne były jak najlepiej przygotowane do funkcjonowania w trudnych warunkach, a jednocześnie by nie były naruszane prawa i wolności człowieka i obywatela. W pracy wskazano główne problemy związane ze świadczeniem usług niematerialnych w czasie pandemii i zaproponowano sposoby ich rozwiązania.
Assessing Price Behavior of Tuna in Indonesia
Authors: Sukiyono Ketut , Asriani Putri Suci , Badrudin Redy , Windirah Nola , Yuristia Rahmi , Nabiu Musriyadi 
Published: March 2022

Highlight ResearchPrices are often a signal for producers to produce or market products, including the price of tuna.Four price behaviors, namely trends, seasonal variation, variability and instability, and market integration, are important to study in designing business development plans.Tuna prices in Indonesia tend to have a statistically positive trend.Tuna prices tend to be stable, or do not have high variability, throughout the observations and indicate a low price risk.The price of tuna fish in each port is formed independently and is not influenced and influences each other between the markets observed.AbstractPrices of agricultural and fisheries products have always been a concern not only by producers and consumers but also by the government in designing policies to control and stabilize these prices to protect the poor. Therefore, a study of price behavior is crucial to be scrutinized more deeply and comprehensively. This research is aimed at examining and analyzing tuna (Thunnus spp.) price behavior in terms of their seasonal, trend, variability, and instability behavior as well as their market integration. For this purpose, monthly data of tuna prices from 2011:1 to 2019:12 in five tuna production centers (provinces) in Indonesia, including North Sulawesi, West Papua, Aceh, North Maluku, and Bali, at the national level were applied. It was found that tuna prices have a positive trend and are statistically significant, excluding in West Papua. The study also found that price variability and instability were insignificant during observations. The study also concluded that the tuna price in every single province in Indonesia is formed independently.
Immune Response of White Shrimp (Litopenaeus vannamei) to Different Density and IMNV Challenge
Authors: Baladrat Nur Komariah , Nurhudah Moch , Utari Heny Budi 
Published: March 2022

Highlight ResearchWhite shrimp (Litopenaeus vannamei) challenged with IMNV and different stocking densitiesThe water quality parameter values are getting worse along with the increase in stocking densityWhite shrimp THC value decreased with increasing stocking density and IMNV challenge testThe development of the IMNV increased with an increase in stocking density seen from the speed and percentage of the appearance of the clinical symptoms and histopathology results AbstractIncreasing in stocking density of shrimp affects the physiology and behaviour of their moving space. The health condition of shrimp is influenced by feeding, growth, and its susceptibility on disease. The aim of this study was to determine the development of immune response in relation to density and the presence of IMNV infection. This study used a completely randomized design (CRD) at density of 100 shrimp.m-2, 200 shrimp.m-2, and 400 shrimp.m-2, with three replications in each treatment. The shrimp used was 5,02±0,26 g and the virus infection was exposed orally. This research was facilitated at the Disease Research Centre Laboratory of Central Proteina Prima Company, Pasar Kemis, Tangerang for 30 days. The results showed that the Total Hemocyte Count (THC) in hemolymph of shrimp had different values between negative controls and challenged IMNV. The lowest THC value was found at a density of 400 shrimp m-2 (3.00x106ml-1). While the highest THC value was at a density of 100 shrimp.m-2 (4.75x106ml-1). This result is supported by the increasing value of water quality parameters along with the increasing density of shrimp. Histopathology changes on skeletal muscle and lymphoid organs confirmed that the development of IMNV infection was faster at high shrimp densities.
Effect of Homogenization Process on the Production of Arthrospira platensis Carotenoid Nanocapsules Encapsulated with Arabic Gum and Whey Protein Concentrate
Authors: Alfionita Khusnul , Budhiyanti Siti Ari , Ekantari Nurfitri 
Published: March 2022

Highlight ResearchThe homogenization process affected the particle size reductionThe homogenization process using both High Speed Homogenizer and Ultrasound had a smaller particle size and the highest efficiency in encapsulation AbstractArthrospira platensis contains a high concentration of carotenoids mainly 80 % β-carotene. The use of β-carotene in functional food and nutritional supplements was constrained by its lack of chemical and physical stability. Therefore, efforts were needed to protect carotenoids from damage by using an encapsulation system. The emulsion preparation before the encapsulation process had an influence on the stability of the oil-in-water emulsion. Various methods were used to prepare emulsions, such as high shear homogenizers (HSH) and ultrasound (US) treatment. The homogenization step was critical because it influenced the chemical stability of any encapsulated compounds. The purpose of this work was to generate nanocapsules of β-carotene with minimum carotenoid degradation, high efficiency of encapsulation, and small particle size, with variation in the homogenization process. This study consisted of 5 treatments, including the homogenization processes used HSH 24.000 rpm for 90 s ; HSH 24.000 rpm for 60 s, amplitude 55 % for 120 s ; amplitude 94 % for 138 s ; amplitude 55 % for 138 s ; and amplitude 55 % for 120 s . Each parameter was analysed by ANOVA followed by Tukey pairwise comparisons with 95% confidence level and p<0.05. The particle size was influenced by the emulsification process, such as homogenization treatment, homogenization time, amplitude, and time of sonication. The sample that was homogenized using both HSH and US had a smaller particle size and the highest efficiency in encapsulation than others. The combination of homogenization process could decrease particle size.
Team Approach: The Management of Adolescents and Adults with Scoliosis and Spina Bifida
Authors: Bradko Viachaslau , Castillo Heidi , Conklin Michael , Fremion Ellen , Rocque Brandon , Hanson Darrell , Sanz-Cortes Magdalena , Whitehead William , Castillo Jonathan 
Published: March 2022

» Globally, the prevalence of myelomeningocele, the most common subtype of spina bifida, is 0.2 to 6.5 per 1,000 live births. In the U.S., adults account for >67% of the overall population with spina bifida.» With an estimated prevalence of up to 50%, scoliosis is one of the most common and severe orthopaedic conditions in patients with myelomeningocele.» The variable effects that scoliosis can have on an individual, the comorbidities associated with progressive scoliosis, and the risks associated with spine surgery call for a strong partnership and care coordination between medical and surgical teams to deliver a patient-centered approach.» A coordinated, structured, planned, and incremental team approach can help individuals achieve the overall goals of functionality and independence, as well as successful transition to adulthood.» Teams should consider a patient’s social determinants of health (e.g., poverty or language barriers) and the effect of scoliosis on quality of life before proceeding with spinal deformity correction.
The CROWDFUNDING AND ISLAMIC SECURITIES: THE ROLE OF FINANCIAL LITERACY
Authors: Majid Rifaldi , Nugraha Rizky Aditya 
Published: March 2022

This study aims to investigate the effect of Islamic Financial Literacy on the intentions of prospective Muslim investors to invest through the Islamic securities crowdfunding FinTech (I-SCF FinTech) platform. With employed Partial Least Square – Structural Equation Modeling, this study used 100 valid samples from the total 125 questionnaires filled in. The sample technique was Simple random sampling with convenience technique. Data were obtained through filling out online questionnaires using a google form containing questions adopted from relevant research. We also employed the Technology Acceptance Model (TAM) combined with the Theory of Planned Behavior (TPB) which also integrated with Islamic Financial Literacy (IFL) focused on investment. The main finding in this study is that IFL switch is the identity as well as the risks inherent in Islamic financial products is found to have a significant effect on behavioral intention. The results of this study are expected to add to the scientific treasures on the side of investors' intentions to adopt I-SCF FinTech which is still very rarely done. Practically, the research has implications for the need to strengthen product and contract literacy followed by supervision and implementation of contracts that are in line with sharia principles through synergy between the Financial Service Authority (OJK) and the crowdfunding FinTech associations as well as relevant stakeholders.
Drilling Fluids Design and Field Deployment for the First HTHP Deepwater Production Project in the US Gulf of Mexico
Authors: Jaimes Juan Pablo , Croy Seth , Bouguetta Mario , Williford Mike 
Published: March 2022

Abstract
High-temperature, high-pressure (HTHP) describes wells where the bottom hole static temperatures (BHST) are at least 300°F. Such wells are not a new topic these days. For a decade, drilling fluid systems have been able to exceed what was traditionally considered HTHP into the realm of ultra-HTHP, meaning wells where the temperature is greater than 500°F. However, in the US Gulf of Mexico (GOM), Bureau of Safety and Environmental Enforcement (BSEE) defines HTHP as greater than 15,000 psi at the wellhead and greater than 350°F (Nannen 2020).
For the first ever HTHP production project in the GOM to receive BSEE approval, reservoir drilling fluid (RDF) formulation was designed for deepwater use. It was formulated to withstand the temperature rigors of an over 350°F BHST. The lower intermediate section also exceeded the limit of the typical synthetic-based mud (SBM) systems used in the US GOM. A high performance, low-sag low-equivalent circulating density (ECD) drilling fluid system was redesigned into a new variant, extending the temperature stability to 340°F for prolonged static periods.
Emphasis was placed on key testing parameters to ensure the drilling fluids would still meet performance requirements in a deepwater environment, while enhancing stability in the high temperature wells. Particular emulsifier packages and weight material were utilized to improve long term sag stability, with static aging stretching up to 28 days. Specialized fluid loss reducers were employed to maintain emulsion stability and tight filter cakes during extended HTHP testing at BHSTs over 350°F.
This paper will explore the process of formulating drilling fluids for these HTHP drilling environments. From the laboratory to the field, this case study will carry through to results and lessons learned from the actual project execution. The drilling fluid systems deployed allowed the expansion of the drilling envelop in the GOM thus the access to new oil reserves.
Design and Analysis of a Comprehensive Database Containing 24,000 Polycrystalline Diamond Compact Cutter Scrape Tests
Authors: Panayirci H. Murat , Skoff Greg , Shen Yuelin 
Published: March 2022

Abstract
This paper presents the design and analysis of a database containing more than 24,000 polycrystalline diamond compact (PDC) cutter scrape tests performed using a pressurized experimental laboratory setup. This unique data set contains high-frequency (2 kHz) measurements of the three-axis forces acting on the cutter in various rocks, cutter types and sizes, cutter orientations, depths-of-cut (DOC), and confining pressures. The database can be accessed, visualized, sorted, classified, and analyzed in detail, offering substantial opportunities to increase the knowledge of the rock-cutting process by PDC cutters. Using this database, the authors initially analyzed the rock type, cutter orientation, and DOC effects on the forces acting on the cutter. By using signal processing techniques, algorithms were developed to extract features from the force data. For example, each test was scored based on the rock chipping that occurred during cutting, which manifests itself as sawtooth patterns in the force data. These data allowed for qualitative evaluation of the effects of confining pressure and DOC on the chipping. In addition, the rock types most prone to chipping were identified. This massive dataset allowed for statistical quantification of the forces acting on the cutters, which resulted in new ways for modeling the rock-cutting process, which is inherently stochastic. Furthermore, it is also possible to quantify the efficiency improvement with different cutter shapes when cutting different rocks, which assists in selecting the correct cutter shape for the targeted application to improve drilling performance. In summary, this extensive database provides novel understandings of the rock-cutting process, which are fundamental to the efficiency of the drilling operations, drilling dynamics modeling, and drilling tool development.
Cement Expansion in Cased Hole Environments: A Novel Laboratory Testing and Evaluation Method with Successful Field Implementation
Authors: Sukhachev Vasilii , Salehpour Amir , Akhmetzianov Ilshat , Sozonov Alexander , Bakhareva Elizaveta , Shabanova Sabina , Zinovyeva Anastasia , Olennikova Olesya , Droger Nicolas 
Published: March 2022

Abstract
Preventing bulk shrinkage of cement in cased hole wells is important when dealing with the risk of sustained casing pressure (SCP). Current studies based on membrane tests suggest that even with a high percentage content of expanding agents, cement systems show little or no expansion in dry media.
An alternative laboratory method, for measuring cement expansion followed by a successful field application, has been used to evaluate the total bulk volume change of the cement based on curing in a dry environment and in water.
A major operator in the Caspian region who experienced some occasions of SCP in the past, is adopting various measures to prevent and mitigate the SCP. This paper presents laboratory testing and successful field implementation of an expanding cement system capable of expanding in the absence of water. This expanding cement system is tested with the American Petroleum Institute (API) membrane and ring test methods, which resulted in proposing a comprehensive procedure modification. The expanding cement system behavior is presented in terms of rheological, filtration, and mechanical properties. The operator accepted the methodology and successfully implemented the recommended solution on their selected wells.
Test results using the API membrane and expansion ring methods are presented. Testing procedure modifications, including curing environment, placement time, shear history, and gel and compressive strength development for measuring bulk volume change of cement are proposed. Contrary to all expectations, a cement system with simple modifications provided measurable expansion in a dry environment while being stable and not over expanding in water.
Optimal cement slurry properties were obtained. The developed cement system, which was successfully implemented in the field, provided long-term zonal isolation with no indication of sustained casing pressure to date.
For the first time, an alternative method is being used to evaluate the bulk volume change of cement that has been exposed to a dry environment. The research results and field data indicate that the expanding cement systems perform well and can be used in intervals with no access to water. Results of this effort will undoubtedly assist operators deal with sustained casing pressures by adopting the methodology.
New Experimental Results Show the Application of Fiber Optic to Detect and to Track Gas Position in Marine Risers and Shed Lights on the Gas Migration Phenomenon Inside a Closed Well
Authors: Santos Otto , Almeida Mauricio , Sharma Jyotsna , Kunju Mahendra , Chen Yuanhang , Waltrich Paulo 
Published: March 2022

Abstract
The main objective of this manuscript is to present and to discuss the results and significant observations gathered during 13 experimental runs conducted in a full-scale test well at Louisiana State University (LSU). The other two objectives of this manuscript are to show the use of distributed fiber optic sensing and downhole pressure sensors data to detect and to track the gas position inside the test well during the experiments; and to discuss experimental and simulated data of the gas migration phenomenon in a closed well.
An existing test well at LSU research facilities was recompleted and instrumented with fiber optic sensors to continuously collect downhole data and with four pressure and temperature downhole gauges at four discrete depths within an annulus formed 9 5/8″ casing and 2-7/8″ to a depth of 5025′. A chemical line was attached to the tubing allowing the nitrogen injection at the bottom of the hole. The research facilities were also equipped with a surface data acquisition system. The experiments consisted in injecting nitrogen into the test well filled with water by two means: either injecting it down through the chemical line or down through the tubing to be subsequently bullheaded to the annulus. Afterwards, either the nitrogen was circulated out of the well with a backpressure being applied at surface to mimic an MPD operation or left to migrate to the surface with the test well closed.
During the runs, the three acquisition systems (fiber optic, downhole gauges, and surface data acquisition) recorded all relevant well control parameter for a variety of gas injected volumes (2.0-15.1 bbl), circulation rates (100-300 GPM) and applied backpressures (100-300 psi). The experimental results gathered by the acquisition systems were very consistent in measuring gas velocities inside the well. The numerical model predictions matched very close the pressure behavior observed in the experimental trials. In the gas migration experiments, it was observed that the bottomhole pressure is not carried to the surface and that this pressure is a function of the volume of gas injected in the well. These facts are supported by the numerical simulation results.
The manuscript shows the possibility of the use of fiber optic and downhole pressure sensors information to detect and to track the gas position inside a well or the marine riser during normal or MPD operations. Additionally, the vast amount of experimental data gathered during the experiments in which the nitrogen was left in the closed well to migrate to surface helped shed lights on the controversial issue concerning the surface pressure build-up while the gas migrates to surface in a closed well. Numerical simulations were all instrumental for supporting the findings.
Measuring of Carbon Footprint in Offshore Drilling
Authors: Allen Marcos 
Published: March 2022

Abstract
The Oil, Gas and Energy industry contributes to combined scope 1/2/3 emissions exceeding 42% of the global GHG emissions, with extraction and drilling accounting for 10% of scope 1 emissions (McKinsey & Company, 2020). With the demand for exploration and production predicted to increase by 2035, offshore drilling will not be replaced by renewable energy sources for the next 15 to 20 years (McKinsey & Company, 2019).
The commitment of NetZero by 2050 aligns with climate science to limit the temperature rise by 1.5 deg C pre-industrial levels. While low carbon energy sources will significantly reduce scope 1 emission, the transition will take time to introduce. In this time, the oil, gas and energy industry will provide a critical role in the technology and economic innovations to provide a cleaner future.
Modelling and carbon footprint of GHG emissions is a significant step in pursuing this goal, giving the vision of decarbonising all offshore drilling operations. The paper aims to solidify the concept of granular carbon footprint, allowing pre-operation decisions with accurate operational trending of CO2 emissions.
Methodology to Use the Cement Bond Quality Classification Matrix as Input for Leakage Rates Assessment
Authors: Ford Eric , Lohne Hans Petter , Beltrán-Jiménez Katherine , Delabroy Laurent 
Published: March 2022

Abstract
Verification of the quality of the cement barrier behind casing is often performed through acoustic or ultrasonic cement logs that probe the presence of cement and its bonding to the casing. In risk-based approaches to permanent well abandonment design, the probable conditions of the existing barriers in the well should be reflected in terms of reliability, or conversely, the risk of leakage through the barrier over time. Connecting the log response to a predictive model of leakage potential behind casings remains a key challenge for the industry.
We build on ultrasonic cement logs acquired in two sandwich joints recently retrieved from a North Sea production well as part of the permanent abandonment operation. The joints consist of 30 years old annulus cement sandwiched between production and intermediate casing joints that have been subjected to a comprehensive test regimen involving pressure and seepage testing. Combined with the log response, these measurements offer an unprecedented opportunity to compare log response and physical measurements of leakage potential. We have developed a methodology for converting a log response to a likely, local microannulus size that in turn reflects the seepage potential of the annular barrier.
Physical testing of the two sandwich joints used as basis for the study revealed significant local variations in seepage potential ranging from effective microannuli of tens of microns down to a very low permeable region with practically impermeable features over the timescale of measurement. Our methodology is based on a Monte Carlo approach for propagating uncertainty from log interpretation to annular seepage potential. We discretize the log response azimuthally and axially into volume elements of locally constant permeability and compare numerical log realizations to the physical measurements. We find generally good qualitative agreement with the cement log and demonstrate conceptually the possibility of utilizing a cement log response for a quantitative assessment of the barrier quality.
Improved interpretation of barrier quality is a key step toward new rig-less abandonment operations and more efficient risk-based abandonment design. Our study represents a first conceptual study that attempts to connect physical measurements of the cement quality behind production casing to its log response. More efforts are required to fully utilize the information contained in cement logs for quantitative comparison of different P&A designs.