bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mental health and learning achievement during the COVID-19 outbreak: A lesson from online learning among Indonesian college students
Authors: Rafsanjani M. A. , Wijaya P. A. , Baskara A. , Wahyudi H. D. 
Published: March 2023

Introduction. All educational institutions have to adjust the learning format, from face-to-face to online learning, due to the COVID-19 outbreak. The sudden shifting of the learning format raised several problems for the students and led to mental health issues.Aim. This study aimed to examine the effect of mental health on students’ learning achievement during online learning in the COVID-19 outbreak.Methodology and research methods. This study used partial least square structural equation modelling (PLS-SEM) to examine the research model on a random sample of 518 respondents.Results. The online learning activities during the COVID-19 outbreak have developed mental health issues, such as anxiety and depression. Furthermore, the results indicated that mental health negatively predicted the students’ learning achievement.Scientific novelty. This study reveals certain situations and conditions that could be affected to the student’s mental health and learning achievement.Practical significance. This study can be useful to the government as policymakers and administrators of the university as current research provides a critical understanding of the online learning influence on mental health and learning achievements of students. The government and administrators of the university should consider the right policy for learning activities during the COVID-19 outbreak. The government and administrators of the university also should provide student services to minimise the mental health issues among college students during online learning activities.
On the principles of building a model of a specialist – a graduate of a pedagogical university
Authors: Kаtаеv K. S. , Kаtаеv S. G. , Kаmenskaya I. V. 
Published: March 2023

Introduction. Assessing students’ progress and predicting their future careers is paramount for any educational institution. The issue is particularly important for a teacher training institution, given the staff shortage in Russian schools and vocational education and training colleges. The educational process plays an important role in a graduate’s choice of future path, and hence, the problem of assessing the quality of this process arises as well.An option of solving this problem is to create a feedback system in the university, which allows evaluating the dynamics of students’ competency formation levels in the monitoring mode.Aim. The current research aims to develop and implement a multifactor competency model of a graduate of a pedagogical university, which can act as the basis for creating a system to monitor the quality of the educational process. The model takes into account psychological and socio-demographic factors, as well as students’ decisions in the field of a professional career.Methodology and research methods. The approbation of the proposed model was carried out on the data obtained as a result of the survey of students of Tomsk State Pedagogical University in 2021. The data were processed by conventional and multivariate statistical methods: factor and cluster analyses. The sample consisted of 189 students of all training courses of the Physics and Mathematics Faculty at Tomsk State Pedagogical University.Results. The analysis of the data obtained by using methods of multivariate statistics allowed the authors to obtain a variety of relationships between the factors taken into account. In particular, a pattern between the values of psychological scales, the level of competency formation and orientation of students in their choice of future profession was found.Scientific novelty. The block structure of the model makes it possible to analyse each block separately and together, selecting factors from different spaces, introducing new blocks or spaces of factors, oriented to the (possibly new) purpose of the study, without changing the others.Practical significance. The reasonableness of the obtained results of the study, the availability of a variety of algorithms for data interpretation indicate the real possibility of using in practice the proposed structure of the model, including the way of organising data as a monitoring system.
A Review Study of Soft Electronic Materials for Epicardial Devices
Authors: Sim Jiwoo , Kim Sunny , Lee Jong Wook 
Published: March 2023

Purpose: Heart failure is a widespread health concern. A person with a heart failure has 5 years shorter life expectancy compared to a person who has a cancer. Specifically, myocardial disease is usually involved with a treatment accompanied by an electrical conduction system. To alleviate the physical burden to heart due to ventricular pacing, epicardial electronic system made of soft and elastic materials is needed.
Methodology: In this review, we discuss candidate materials for novel epicardial sensing/stimulation system that matches similar mechanical properties of heart. Materials are categorized as soft conductive materials consist of elastomer and conductive filler and tissue-like low modulus materials. Like hydrogel and its conductive composites.
Main Findings: The soft nanocomposites integrated with nanomaterials as filler and elastomer/hydrogel as matrix show potential to open a new pathway in high-performance epicardial electronic system that improve accuracy, stability, and long-term usability in diagnosis and treatment of heart diseases.
Implications: Multifunctional epicardial system that monitors electrical conduction of epicardium surface and stimulate epicardium simultaneously could be a powerful tool to diagnose and treat myocardial disease.
Novelty: This review study is focused and written in simple terms for readers.
O zapomnianym pałacu Sapiehów w Dubnie na Podlasiu
Authors: Andrzejewska Aldona , Karwowska Halina , Andrzejewski Aleksander 
Published: March 2023

Sapiehowie to jeden z najpotężniejszych rodów magnackich Wielkiego Księstwa Litewskiego, wywodzący się z ziem dzisiejszej Białorusi i Rosji. Jeden z nich Iwan Sapieha był pierwszym wojewodą podlaskim. W 1512 r. został właścicielem wsi Dubno, gdzie od przełomu XVI i XVII w. funkcjonował zespół dworski, który na przełomie XIX i XX w. został zrujnowany i zapomniany.
W latach 2006–2010 i 2013 przeprowadzono wykopaliskowe badania archeologiczne, m.in. dzięki dotacjom z Europejskiego Funduszu Rozwoju Regionalnego w ramach Programu Sąsiedztwa Polska-Białoruś-Ukraina INTERREG IIIA/TACIS CBC 2004-2006 oraz Ministerstwa Kultury i Dziedzictwa Narodowego. Prace archeologiczne uzupełniono badaniami nieinwazyjnymi, geomorfologicznymi, przyrodniczymi, fotografią lotniczą oraz stosownymi kwerendami źródłowymi.
Prace te przyniosły niezwykle interesujące rezultaty. Okazało się bowiem, że odkryto ukryte pod powierzchnią ziemi relikty tej rezydencji. W efekcie przeprowadzonych prac archeologiczno-architektonicznych można było zrekonstruować w znacznej mierze ten zespół rezydencjonalny składający się z pałacu, kaplicy, innych budynków pomocniczych, jak: karczma, oranżeria, lamus. Jednak najbardziej spektakularnym wynikiem było odkrycie pałacu, nazywanego Kamienicą Wielką. W trakcie badań rozpoznany został rzut kamienicy na poziomie parteru oraz zlokalizowany w piwniczce skarbczyk.
Opisana Kamienica Wielka jest typowym dla XVII w. zespołem budynków dworskich. Jednak jest jednym z pierwszych na Podlasiu obiektów, które zostały odkryte w miejscu, gdzie na powierzchni ziemi śladami dawnej świetności były tylko ułamki ceramiki naczyniowej i gruz ceglany. Tak więc badania archeologiczne przywróciły do świadomości społecznej i wprowadziły do „obiegu naukowego” zapomnianą rezydencję Sapiehów, jednego z najznakomitszych rodów Rzeczpospolitej Szlacheckiej.
Skuteczność instytucji referendum lokalnego w sprawie referendów tematycznych w kadencji 2014–2018
Authors: Rosińska Aleksandra , Kozłowski Paweł 
Published: March 2023

Celem artykułu jest analiza procesu lokalnego referendum tematycznego pod względem: skuteczności, frekwencji oraz popularności. W artykule wykorzystaliśmy metody: analizy treści artykułów prawnych i ustaw oraz analizę statystyczną danych uzyskanych z banku Głównego Urzędu Statystycznego oraz Państwowej Komisji Wyborczej. Zgodnie z przeprowadzanymi badaniami udało nam się uzyskać następujące wnioski: referenda tematyczne charakteryzują się niższą popularnością, wyższą skutecznością wobec lokalnych referendów odwoławczych oraz wysoką frekwencją względem wszystkich przeprowadzonych referendów w kadencji 2014–2018. Zasugerowaliśmy potencjalne zmiany, które mogłyby pozytywnie wpłynąć na jakość procesu i rozwiązać wskazane problemy.
HISTORIOGRAFI MASA KINI: MENGISI RUANG KOSONG
Authors: Asmawati Rika Inggit 
Published: March 2023

The history of historical writing in Indonesia is interesting to observe. This is because the history of writing Indonesian history continues to experience development. One of the developments in Indonesian historiography is how Indonesia-centric historiography is not only dominated by narratives of political history. The dominance of political history narratives in Indonesian historiography also influences the study of Indonesian national history. In fact, the past life of the Indonesian people was not only dominated by political life. At present, Indonesian historiography tries to provide space for historical studies that are not only dominated by political history, one of which is by presenting the history of everyday life. This is a first step for historians to present a more complete and thorough narrative of the past. However, writing the history of everyday life raises other challenges, one of which is that the use of conventional historical sources usually does not present narratives of everyday life. For that, it is necessary to use unconventional historical sources.
Abstrak
Sejarah penulisan sejarah di Indonesia menarik untuk dicermati. Hal ini dikarenakan sejarah penulisan sejarah Indonesia (Historiografi Indonesiasentris) terus mengalami perkembangan. Salah satu perkembangan yang terjadi dalam historiografi Indonesia adalah bagaimana historiografi Indonesiasentris tidak hanya didominasi narasi sejarah politik. Dominasi narasi sejarah politik dalam historiografi Indonesia ini turut berpengaruh terhadap kajian sejarah nasional Indonesia. Padahal, kehidupan masa lalu bangsa Indonesia tidak hanya didominasi oleh kehidupan politik saja. Di masa kini, historiografi Indonesia berusaha memberikan ruang terhadap kajian sejarah yang tidak hanya didominasi sejarah politik saja, salah satunya dengan menghadirkan sejarah kehidupan sehari-hari. Ini adalah sebuah Langkah awal dari para sejarawan untuk menghadirkan narasi masa lalu yang lebih lengkap dan menyeluruh. Namun, menulis sejarah kehidupan sehari-hari ternyata menimbulkan tantangan permasalahan lain, salah satunya adalah penggunaan sumber sejarah konvensional biasanya tidak menghadirkan narasi kehidupan sehari-hari. Untuk itu, diperlukan penggunaan sumber sejarah yang tidak konvensional.
SUGAR SWEETENED BEVERAGE TAX AND ITS IMPLICATIONS FOR PUBLIC HEALTH
Authors: Avirneni Hari Teja , John Anugraha , Swaminathan Sinthu Sarathamani 
Published: March 2023

Introduction: Sugar Sweetened Beverages (SSBs) consumption has increased to higher levels across all corners of the world. High sugar diets in the form of SSBs lead to increased calorie intake with almost no nutritive value when compared to solid food and contributes to the increased energy intake resulting in an unhealthy weight gain, often associated with health issues such as obesity, diabetes, cardio-vascular diseases, early tooth decay and formation of cavities. It is also observed that consumption of SSBs is linked to unhealthy habits like smoking, decreased physical activity, increased intake of fast food and increased screen time. Method: The required information on SSB tax implementation at the global level was retrieved from the literature reviews. Result: Taking such detrimental effects of SSBs into consideration, many countries are putting efforts to tackle the problem of higher consumption of SSBs by adopting measures such as taxations on SSBs. However, it is also extremely important to understand how these taxes help in generating higher revenues to the government which, in turn, can be used for various community needs in the respective countries. Conclusion: The same revenue can also be utilised for implementation of comprehensive healthcare programmes especially in Low and Middle-Income Countries (LMIC), by providing preventive, promotive, curative, rehabilitative and palliative services as a way to progress towards Universal Health Coverage (UHC).
Flowback and Well Testing Operational Learnings During an Early Production Stage in a Vaca Muerta Field
Authors: Cano Pablo Nicolás , Irazuzta Verónica Laura , Curtti Miguel Andrés , Álvarez Matias Guillermo 
Published: March 2023

Abstract
La Calera is an unconventional wet gas field located close to Añelo city in Neuquén province. There are currently 30 horizontal wells in production from Vaca Muerta formation, drilled at three different landings zones, gathered in 3-well pads. The wells are first opened using testing facilities in order to evaluate their productivity, as well as to prevent liquids and sand from reaching plant facilities. This paper describes the lessons learned after the first wells flowback, the different events that had to be sorted (sand blockage, erosion, hydrates, etc.) and the operational workflows that were created in order to manage sand and fluids production from the wells.
Testing facilities consist primarily of two gas-oil-water 3-phase separators, a flash medium pressure separator, and a last separation stage used to stabilize the condensate in a flash-tank. There is also one desander per well, and several tanks in order to collect liquids in the pad location. This equipment is necessary because the wells are currently flowing to Early Production Facilities (EPF) that do not allow liquid slugs nor high sand production. Gas, condensate and water rates, well head pressures and sand production are measured in every well hourly. A first choke management strategy for each well is proposed and their productivities are estimated using previous wells information regarding productivity, ratios, sand production, and a choke correlation.
The first unconventional well was opened in 2019. Three years after and using flowback lessons learned, several testing configurations were changed, liquids heaters removed, sand equipment changed, line diameters modified, chemical injection points and doses adjusted, and different operational criteria established. A sand management workflow was developed and is currently being applied during pads openings.
During the first clean up period that usually lasts from 3 to 4 months, the initial choke management plan is constantly being modified due to operational challenges such as hydrates formation, excessive sand or liquid production, and operational problems like valve failures or facilities limitations, all of which will be described in this paper.
Multiphase Choke Correlation Improving Matching Field Data on Vaca Muerta Formation
Authors: Bellini Aragon Nicolas Gabriel , Villagra Fernando Martin 
Published: March 2023

Abstract
In Non-Conventional fields, wellhead chokes are widely used to regulate the flow rate of the well to impose sufficient back pressure on the face of the sand so as not to exceed values of excessive drawdown. Many authors describe and model flow through chokes, but only with laboratory data. These models work well, and their error range is acceptable for the oil industry, but they fail when extrapolate to field data or outside the range with which the calculation algorithm was trained.
The new model proposed is a modified version of the original Sachdeva(8) correlation and uses workflow proposed by Hagedorn and Brown(11).
Usually, correlations used nowadays in the oil industry present big errors of at least 20% and such errors make it impossible to provide an accurate production forecast and make correct decisions when choke management is required.
The new workflow, based on Sachdeva(8) (1986) and Hagedorn and Brown correlation(11) (1965), improves the existing models using real data from oil fields. This workflow makes it possible to predict mass flowrate through choke without parameters like "Discharge coefficients".
The multiphase choke correlation presented in this paper for both subcritical and critical flow was developed and trained with real field production tests with shale oil wells from different fields of "Vaca Muerta" Formation in Neuquén Basin.
This correlation was tested, and its performance was compared with published correlations.
This new workflow was correlated with 258 points (124 points for training purpose and 134 points for cross check). The average error was 11.67 % and R^2=0.945. In cases where historical data exists, this error can be reduced to an order of 2-5 %.
The new correlation is a modified Sachdeva(8) correlation including slippage between phases and use Hagedorn and Brown(11) methodology to find "Discharge Coefficient".
3D Integrated G&G Model-Driven Mitigation Workflow on Screenout, Frac Hits and Casing Deformation in Ultradeep Shale Hydraulic Fracturing
Authors: Wu Jianfa , Zeng Bo , Wang Lipeng , Huang HaoYong , Pan Yuanwei , Song Yi , Nunez Herick , Deng Qi , Wang Lizhi , Zhao Haipeng 
Published: March 2023

AbstractThe Longmaxi shale gas play in Sichuan, China is unique due to multiple tectonic deformations in the geological history, which makes the shale play highly heterogenous and hydraulic fracturing execution problematic. The hydraulic fracturing design has matured after ten years’ evolution. However, it could not ensure every well's success without considering heterogeneity. Screenout, fracture hits, and casing deformation are still very common because informed decisions cannot be made ahead of operation or in real time. These risks should be recognized and in turn mitigation measures could be proposed through deep understanding of the geological and geomechanical characteristics.To address these challenges, a multidisciplinary team was formed to work on a pad. The geological and geomechanical (G&G) context was first determined by 3D G&G modeling. Then a survey was completed on the whole block to determine the root causes of screenout, frac hits, and casing deformation, and high-risk areas or stages were identified. Based on this, the proposed mitigation included adjusting perforation design, pump rate, fluid volume, and fracture sequence. The effectiveness of mitigation measures and the 3D G&G model were validated and iterated by onsite fracturing diagnostics.Through the above efforts, the designed proppant volume achieved zero casing deformations, fewer screenouts, and weaker fracture hits. This was the first pad with zero casing deformations across the whole block. The key findings were proved to be effective and could ensure success of hydraulic fracturing in the study pad of ultradeep Longmaxi Shale:The natural fracture corridors were the main cause of screenout. The possible bedding plane open and bad fracture initiation could be other causes of screenout. The natural fracture was the main cause of fracture hit and the connection among hydraulic fractures was the second cause. Adjusting the zipper fracturing sequence to interfere with hydraulic fracture propagation could help weaken it. Unstable natural fracture was the main causes of casing deformation in the Luzhou Block. Adjusting the fracturing sequence and fluid pumping intensity could mitigate casing deformation. The key to effective mitigation was continuous 3D G&G modeling through ongoing iterations with field data.Finally, a model-driven workflow was developed for hydraulic fracturing design and execution, which could be a resource for other shale plays with similar challenges worldwide.
Quantification of Fluid Production Distribution in Deviated Wells with High Gas-Liquid Ratio Using a Flow Array Sensing Tool
Authors: González José Wilfredo , Linares Alejandro Jose , Rodriguez Diego Armando , Rivera Gerson Orlando , Schoepf Virginie M , Abbassi Linda 
Published: March 2023

AbstractThe objective of this paper is to depict the quantification of the production rates of the different phases in deviated wells with high gas-liquid relation using the Flow Array Sensing Tool (FAST). The readings of standard Production Logging Tools (fullbore flowmeter, density, and capacitance) are centralized, therefore they are affected if there is re-circulation of the heavy phase (liquid). The phase segregation and possible apparent down flow of the heavy phase makes it very difficult to determine the distribution of the produced fluids, and in some cases the spinner flowmeter tends to stop or gives inaccurate readings. The cause of these inaccurate readings is that the centralized spinner is affected by positive flow in the high side and negative flow in the low side of the wellbore, and the spinner shows no flow or even apparent downhole flow, when there is a real positive flow.The FAST tool used during the acquisition of the production logs is an ultracompact production logging tool (3 ft long) that is capable to measure multiphase flows with an array of 8 sensors, two in each arm and located 90° apart. These sensors are based on MEMS (Microelectromechanichal Systems), and among the interchangeable sensors we have optical probes that takes ultra-rapid measurements of the refractive index and can determine hold-up of water, oil and gas; the electrical probes that measures conductivity to differentiate hydrocarbons from water, and magnetic probes with micro-spinners to determine the flow rate. Both the three phase optical probes and the electrical probes have excellent response including water hold-ups over 90% that cannot be measured with a standard capacitance tool.The data logged with FAST in deviated wells was processed and interpreted to obtain the apparent flow velocity profiles of each of the 4 micro-spinners and with the three phase optical probes, and the relative bearing curves the velocity maps, and hold-up maps where obtained. The velocity map showed that there was negative flow in the low side of the well and positive flow in the high side while the hold-up map showed the light phase (gas) in the high side of the well. Both maps showed clearly the flow pattern and were used to quantify the production of each perforation and the total rate matched closely the surface rate (within 2% deviation).With the hold-up and velocity maps, the real flow rates were obtained with high confidence, and the flow pattern were shown clearly in deviated wells. The three phase optical probes, and electrical probes are excellent indicators of water and hydrocarbons inflow in a wide range of hold-ups.