bluuebunny/crossref_metadata_2025_split huggingface dataset:
Petroelastic simulation as a method for analysing the anisotropy of elastic properties on the scale of seismic surveys
Authors: Savoyskaya M. K. , Bayuk I. O. 
Published: October 2022

Introduction. Reservoirs composed of thin layers with different elastic properties exhibit the anisotropy of elastic properties. Anisotropic environments are studied using special seismic positioning systems that require large financial and time resources. However, neglecting pronounced anisotropy leads to misinterpretation of the data. Evaluation of the degree of anisotropy of a thin-layer stratum allows researchers to determine whether anisotropy could be neglected by conditionally considering the stratum to be isotropic.Aim. To estimate the anisotropy of carbonate rocks on the scale of seismic surveys based on the data of geophysical well logging and petroelastic simulation.Materials and methods. Models of carbonate rocks with different characteristics of pore space were created based on the Berryman and Backus methods. For these models, an analysis of the degree of anisotropy by Thomsen parameters was carried out. Acoustic and density logging data of a well located in Western Siberia were used for comparison with actual data.Results. A numerical characteristic was found, the analysis of which helped to determine the significance of anisotropy before the application of the Backus method thus significantly reducing the number of necessary computational processes.Conclusion. The obtained parameter of the degree of rock heterogeneity correlates well with Thomsen parameters responsible for anisotropy, which indicates the possibility of its use for assessing the anisotropy of strata.
Review of rationales for the introduction of the “Geophysical electrodynamics” term
Authors: Aksenov V. V. 
Published: October 2022

Background. The article provides arguments for the introduction of the “geophysical electrodynamics” term.Aim. To justify the introduction of a new term “geophysical electrodynamics”.Methods of substantiation. The limits of the applicability of Maxwell’s equations are studied. Additionally, some concepts are introduced, in particular, about a new paradigm in electrodynamics, about new equations in geophysical electrodynamics, about the differences between new electrodynamics and Maxwell’s electrodynamics, about the sources of toroidal and poloidal electromagnetic fields, about toroidal currents in Maxwell’s equations, about non-power electromagnetic fields, about the quantum effect in non-power electromagnetic fields, toroidal fields in the core of the Earth, mathematical achievements in the new paradigm, about the reproduction of sources of the electromagnetic field of the Earth, and effects in classical electrodynamics explained by geophysical electrodynamics.Results. Responses to the above justifications were received.Conclusion. Physical and mathematical justifications for the introduction of the term “geophysical electrodynamics” find confirmation both in the natural electromagnetic field of the Earth, and in a number of long-known classical effects in the standard Maxwell’s electrodynamics. Small but fundamental differences of one electrodynamics from another will reduce the number of effects unexplained from the standpoint of Maxwell’s equations, encountered in both theory and experiments on Earth.
Forecast of the morphology and occurrence conditions of complex chromite ore bodies (on example of Labogeyskoe-2 site, Polar Urals)
Authors: Morozova  T. P. , Karelina E. V. , Markov V. E. 
Published: October 2022

Background. Chromium ores are confined to stratified massifs of basic and ultra-basic composition. The Voikaro-Sinyinsky massif is part of the main hyperbasite belt of the Urals. Inside the hyperbasites of this massif, at the boundaries of tectonic flakes in particular, ultra-basic metamorphites are developed, constituting the zones of sharply variable thickness. During survey routes, a mechanical halo of scattering of ore fragments was found. When studying the ore stockpile, ditches opened the Labogeyskoe-2 chromite ore body, which belongs to the Pogureysky block of the Voikaro-Sinyinsky massif. In the ore occurrence area, harzburgites are predominantly developed with thin striped dunite aggregates in a small volume and individual dunite bodies of low thickness. Chromium ores are densely impregnated, medium- to coarse-grained. The amount of chromospinelides in the composition of ores сonstitutes 90—95%, the serpentine of irregular shape as well as the relics of olivine and emerald-green uvorovite grains, along with the single grains of pyrrhotite and magnetite are found in the interstitia (2—5%). Ores are massive, often cataclazed. The experience of studying this ore occurrence can serve as an analogue for a more effective study of similar ore occurrences. Aim. Evaluation of the Labogeyskoye-2 ore occurrence for the application of the information obtained and methods of its study in the study of a similar Levopayersk ore body, which will help save time and finances in the design and more efficient exploration.Materials and methods. During the filming routes, a mechanical halo of scattering of ore fragments was detected. During the study of the ore collapse in 1966, the KM22—KM25 ditches were passed and the Labogeyskoye-2 chromite ore body was uncovered by the KM24 ditch. In 2013, during geological exploration at Labogeyskoye-2, 3 ditches (K50—K52) were passed and detailed gravimagnetic studies of Institute of Mineralogy, Geochemistry and Crystal Chemistry of Rare Elements in 2011—2012 were performed.Results. The Levopayerskoe ore body is probably the closest analogue of the Labogeyskoye-2 ore occurrence among the 24 ore occurrences, for which geological plans and calculation sections were compiled based on the results of mining and drilling operations.Conclusions. The closest analogue of the Labogeyskoye-2 ore occurrence is probably the Levopayerskoye ore body. Therefore, further geological and exploration work at the Labogeyskoe-2 site should be carried out taking into account the conditions of occurrence of the similar Levopayerskoe ore body.
An engineering-geological study of rock soils and the products of their fracture zones (Albazinskoe deposit, north Khabarovsk Krai)
Authors: Ryashchenko T. G. , Maslov E. A. , Bryzhak E. V. , Shtel’makh S. I. 
Published: October 2022

Background. The results of an engineering-geological study of rock soils and the products of their fault zones are considered on the example of samples selected in the sides of the Albazinskoe gold-bearing deposit located in the north of the Khabarovsk Krai.Aim. To develop and implement a methodological approach, which includes laboratory determinations of the velocity of propagation of longitudinal seismic waves (“seismic speed”) using a “Pulsar-2.2” unit (methods of continuous and through sounding), as well as density, porosity and water absorption determinations along with obtaining information about the types of microstructure and microtexture, the mineral composition and mineral alteration features under the influence of metamorphism (using petrographical thin sections).Materials and methods. For the collected rock soil samples the relationship between seismic velocity and physical properties indicators was evaluated (R-type cluster analysis programme). The products of fractural zones were studied in a laboratory according to a specially-developed methodological approach: extended (black clay) and reduced (crushed stone formations with debris). The microelement composition of the clay and gravel of argillites was determined for the first time, and the level of their pollution by toxic microelements (Zc index) was evaluated.Results. On the basis of quantitative assessment of the relationship between indicators of rocky soils various properties identified using the cluster analysis program, an “anomalous” conclusion is obtained about the absence of the rock soil density effect on seismic properties, which can be explained by the textural and structural features, as well as by mineral composition and the consequences of metamorphism (cataclastic and blastogenetic features recorded on the microscale in thin sections).Conclusion. The proposed methodological approach can be recommended for further studies of seismic, strength and physical properties of rocky soils during seismological and engineering-seismological studies of various territories.
Development Programme of Sergo Ordzhonikidze Russian State University for Geological Prospecting (MRGI) for 2023—2027
Authors: Panov Yu. P. 
Published: October 2022

Russia’ national Programme for the Reproduction of the Mineral Resource Base cannot be implemented successfully without coordination between the quality of mining specialist training and the pace of developing mineral resources both in terms of solving methodological issues and providing stable funding.The Sergo Ordzhonikidze Russian State Geological Exploration University carries out its activities aimed at training specialists for organizations of the Federal Agency for Subsoil Use. This direction is elucidated in the Programme and Development Strategy of the University for 2023–2027.
Hubungan Antara Kebiasaan Membaca Siswa Dan Kemampuan Memahami Membaca Mereka
Authors: Imron Ali 
Published: October 2022

Penelitian ini bertujuan untuk mengetahui hubungan antara kebiasaan membaca siswa dalam bahasa Inggris dengan kemampuan pemahaman membaca siswa. Metode yang digunakan dalam penelitian ini adalah metode kuantitatif dan dalam bentuk penelitian korelasi. Populasi dalam penelitian ini adalah 36 siswa kelas X IPA 1 SMAN 4 Rejang Lebong . Rejang Lebong , Bengkulu tahun akademik 2020/2021. Kuesioner dan tes pemahaman bacaan digunakan sebagai instrumen untuk mengumpulkan data dalam penelitian ini. Formula Product Moment Pearson digunakan untuk menghubungkan antara kebiasaan membaca dalam bahasa Inggris (variabel X) dan kemampuan pemahaman membaca (variabel Y). Hasil uang didapat menunjukkan bahwa ada hubungan yang kuat dengan nilai 0,642 antara kebiasaan membaca siswa dalam bahasa Inggris dan kemampuan pemahaman membaca siswa dan tingkat signifikannya adalah (0,00<0,05) Kata Kunci: Kemampuan Membaca, Kemampuan Memahami,
Examining the Motivation to Read and Its Relationship to Second Language Reading Proficiency in an Indonesian EFL Tertiary Context
Authors: Jannah Miftahul , Sahiruddin Sahiruddin , Rusmawati Roosi 
Published: October 2022

The purpose of this research is to investigate and describe the intrinsic and extrinsic motivations of tertiary-level EFL students in Indonesia toward reading English. The quantitative method was applied by asking students majoring in English at Brawijaya University to fill out a questionnaire adapted from Wigfield and Guthrie's Motivation for Reading Questionnaire (MRQ) (1997). The questionnaire was administered to students from 2018 generations to 2020 generations. Besides that, students’ self-assessment reading value used to measure students’ reading proficiency. In addition, this study also examined the correlation between students' reading motivation and their reading ability. The data collected were analyzed using the SPSS program with descriptive statistics to answer research question 1 and Pearson correlation analysis to answer research question 2. The results indicated that students are relative highly extrinsic motivated in reading English. Meanwhile, intrinsic motivation was found to have a significant correlation and extrinsic motivation was found to have a negative correlation with students' reading. Based on these findings, lecturers are expected to increase students' intrinsic motivation to read.
The Correlation between EFL Students’ Vocabulary Knowledge and Reading Comprehension
Authors: Manihuruk David Hotmagasi 
Published: October 2022

This study aimed at investigating the correlation between students ’vocabulary mastery and reading comprehension performance. The population of the study was the whole students at the English Education Department of Universitas Kristen Indonesia. The sample was taken using the cluster sampling technique, i.e., by taking 52 students of Batch 2015, 2016, and Batch 2017 as the participants. Data were collected in May 2019 by administering vocabulary mastery and reading comprehension tests. The instrument’s reliability was tested employing Cronbach Alpha with the results of 0.733 for the vocabulary test and 0.730 for the reading comprehension test, indicating both instruments are reliable. Using Spearman's non-parametric test, the correlation coefficient between the two variables at the sig. (2 tailed) and 0.05 level of significance was 0.014. This indicates there is a positive moderate correlation between vocabulary knowledge and reading comprehension.
Prinsip-Prinsip Pendidikan Anak Dalam Ulangan 6:4-9
Authors: Astuti Sri , Silalahi Desi Sutresia 
Published: October 2022

The problem in this paper lies in the principles of child education contained in the Israel Shema. This discussion aims to First, the author can find out how the Israeli concept of children and the significance of children's education for the Israelites; Second, the writer knows the method or method applied by Israeli parents in educating their children; Third, the author can explore and describe the principles of child education contained in Deuteronomy 6:4-9. So this paper uses a library research approach. The conclusion of this paper proves that first, first, the nation of Israel is a nation that prioritizes education for children, because for the Jewish nation children are a precious gift from God. Second, in the Jewish tradition the family is the first and foremost place of education for children. The pattern used by Israeli parents in educating their children is by bringing their children to attend worship rituals, namely religious activities in houses of worship or celebrating religious holidays with the family, so that children have direct experience with God through worship, as well as using symbols. In addition, the methods used are verbal and non-verbal methods. Third, three important things are the principles of Shema written in Deuteronomy 6:4-9, namely loving God, educating children is the responsibility of parents, and repeated teaching.

Abstrak Bahasa Indonesia
Permasalahan dalam tulisan ini terletak pada Prinsip-prinsip pendidikan anak yang terkandung dalam Shema Israel. Pembahasan ini bertujuan untuk Pertama, penulis dapat mengetahui bagaimana konsep orang Israel tentang anak dan signifikansi pendidikan anak bagi bangsa Israel; Kedua, penulis mengetahui cara atau metode yang diterapkan oleh orangtua Israel dalam mendidik anak; Ketiga, penulis dapat menggali dan menguraikan prinsip-prinsip pendidikan anak yang terkandung dalam Ulangan 6:4-9. Maka tulisan ini menggunakan pendekatan penelitian kepustakaan. Kesimpulan tulisan ini membuktikan bahwa pertama, Pertama, bangsa Israel merupakan bangsa yang sangat mengutamakan pendidikan kepada anak, sebab bagi bangsa Yahudi anak adalah anugerah berharga dari Allah. Kedua, dalam tradisi Yahudi keluarga merupakan tempat pendidikan pertama dan yang utama bagi anak. Pola yang digunakan orang tua Israel dalam mendidik anak yaitu dengan membawa anak untuk mengikuti ritual ibadah, yaitu kegiatan keagamaan di rumah ibadah maupun merayakan hari raya keagamaan bersama keluarga, sehingga anak memiliki pengalaman langsung dengan Allah melalui ibadah, juga menggunakan simbol-simbol. Selain itu, metode yang digunakan adalah metode verbal dan non verbal. Ketiga, tiga hal penting yang menjadi prinsip pendidikam Shema yang tertulis di dalam Ulangan 6:4-9, yaitu mengasihi Allah, pendidikan anak adalah tanggung jawab orang tua, dan pengajaran berulang-ulang.
Validating left atrial fractionation and low-voltage substrate during atrial fibrillation and sinus rhythm—A high-density mapping study in persistent atrial fibrillation
Authors: Huang Taiyuan , Chen Juan , Müller-Edenborn Björn , Mayer Louisa , Eichenlaub Martin , Moreno Weidmann Zoraida , Allgeier Juergen , Bohnen Marius , Lehrmann Heiko , Trenk Dietmar , Schoechlin Simon , Westermann Dirk , Arentz Thomas , Jadidi Amir 
Published: October 2022

BackgroundLow-voltage-substrate (LVS)-guided ablation for persistent atrial fibrillation (AF) has been described either in sinus rhythm (SR) or AF. Prolonged fractionated potentials (PFPs) may represent arrhythmogenic slow conduction substrate and potentially co-localize with LVS. We assess the spatial correlation of PFP identified in AF (PFP-AF) to those mapped in SR (PFP-SR). We further report the relationship between LVS and PFPs when mapped in AF or SR.Materials and methodsThirty-eight patients with ablation naïve persistent AF underwent left atrial (LA) high—density mapping in AF and SR prior to catheter ablation. Areas presenting PFP-AF and PFP-SR were annotated during mapping on the LA geometry. Low-voltage areas (LVA) were quantified using a bipolar threshold of 0.5 mV during both AF and SR mapping. Concordance of fractionated potentials (CFP) (defined as the presence of PFPs in both rhythms within a radius of 6 mm) was quantified. Spatial distribution and correlation of PFP and CFP with LVA were assessed. The predictors for CFP were determined.ResultsPFPs displayed low voltages both during AF (median 0.30 mV (Q1–Q3: 0.20–0.50 mV) and SR (median 0.35 mV (Q1–Q3: 0.20–0.56 mV). The duration of PFP-SR was measured at 61 ms (Q1–Q3: 51–76 ms). During SR, most PFP-SRs (89.4 and 97.2%) were located within LVA (&lt;0.5 mV and &lt;1.0 mV, respectively). Areas presenting PFP occurred more frequently in AF than in SR (median: 9.5 vs. 8.0, p = 0.005). Both PFP-AF and PFP-SR were predominantly located at anterior LA (&gt;40%), followed by posterior LA (&gt;20%) and septal LA (&gt;15%). The extent of LVA &lt; 0.5 mV was more extensive in AF (median: 25.2% of LA surface, Q1–Q3:16.6–50.5%) than in SR (median: 12.3%, Q1–Q3: 4.7–29.4%, p = 0.001). CFP in both rhythms occurred in 80% of PFP-SR and 59% of PFP-AF (p = 0.008). Notably, CFP was positively correlated to the extent of LVA in SR (p = 0.004), but not with LVA in AF (p = 0.226). Additionally, the extent of LVA &lt; 0.5 mV in SR was the only significant predictor for CFP, with an optimal threshold of 16% predicting high (&gt;80%) fractionation concordance in AF and SR.ConclusionSubstrate mapping in SR vs. AF reveals smaller areas of low voltage and fewer sites with PFP. PFP-SR are located within low-voltage areas in SR. There is a high degree of spatial agreement (80%) between PFP-AF and PFP-SR in patients with moderate LVA in SR (&gt;16% of LA surface). These findings should be considered when substrate-based ablation strategies are applied in patients with the left atrial low-voltage substrate with recurrent persistent AF.
Clinical outcomes of subcutaneous vs. transvenous implantable defibrillator therapy in a polymorbid patient cohort
Authors: Kattih Badder , Operhalski Felix , Boeckling Felicitas , Hecker Florian , Michael Felix , Vamos Mate , Hohnloser Stefan H. , Erath Julia W. 
Published: October 2022

BackgroundThe subcutaneous implantable cardioverter-defibrillator (S-ICD) has been designed to overcome lead-related complications and device endocarditis. Lacking the ability for pacing or resynchronization therapy its usage is limited to selected patients at risk for sudden cardiac death (SCD).ObjectiveThe aim of this single-center study was to assess clinical outcomes of S-ICD and single-chamber transvenous (TV)-ICD in an all-comers population.MethodsThe study cohort comprised a total of 119 ICD patients who underwent either S-ICD (n = 35) or TV-ICD (n = 84) implantation at the University Hospital Frankfurt from 2009 to 2017. By applying an inverse probability-weighting (IPW) analysis based on the propensity score including the Charlson Comorbidity Index (CCI) to adjust for potential extracardiac comorbidities, we aimed for head-to-head comparison on the study composite endpoint: overall survival, hospitalization, and device-associated events (including appropriate and inappropriate shocks or system-related complications).ResultsThe median age of the study population was 66.0 years, 22.7% of the patients were female. The underlying heart disease was ischemic cardiomyopathy (61.4%) with a median LVEF of 30%. Only 52.9% had received an ICD for primary prevention, most of the patients (67.3%) had advanced heart failure (NYHA class II–III) and 16.8% were in atrial fibrillation. CCI was 5 points in TV-ICD patients vs. 4 points for patients with S-ICD (p = 0.209) indicating increased morbidity. The composite endpoint occurred in 38 patients (31.9 %), revealing no significant difference between patients implanted with an S-ICD or TV-ICD (unweighted HR 1.50, 95 % confidence interval (CI) 0.78–2.90; p = 0.229, weighted HR 0.94, 95% CI, 0.61–1.50, p = 0.777). Furthermore, we observed no difference in any single clinical endpoint or device-associated outcome, neither in the unweighted cohort nor following inverse probability-weighting.ConclusionClinical outcomes of the S-ICD and TV-ICD revealed no differences in the composite endpoint including survival, freedom of hospitalization and device-associated events, even after careful adjustment for potential confounders. Moreover, the CCI was evaluated in a S-ICD cohort demonstrating higher survival rates than predicted by the CCI in young, polymorbid (S-)ICD patients.
Improving predictive performance in incident heart failure using machine learning and multi-center data
Authors: Sabovčik František , Ntalianis Evangelos , Cauwenberghs Nicholas , Kuznetsova Tatiana 
Published: October 2022

ObjectiveTo mitigate the burden associated with heart failure (HF), primary prevention is of the utmost importance. To improve early risk stratification, advanced computational methods such as machine learning (ML) capturing complex individual patterns in large data might be necessary. Therefore, we compared the predictive performance of incident HF risk models in terms of (a) flexible ML models and linear models and (b) models trained on a single cohort (single-center) and on multiple heterogeneous cohorts (multi-center).Design and methodsIn our analysis, we used the meta-data consisting of 30,354 individuals from 6 cohorts. During a median follow-up of 5.40 years, 1,068 individuals experienced a non-fatal HF event. We evaluated the predictive performance of survival gradient boosting (SGB), CoxNet, the PCP-HF risk score, and a stacking method. Predictions were obtained iteratively, in each iteration one cohort serving as an external test set and either one or all remaining cohorts as a training set (single- or multi-center, respectively).ResultsOverall, multi-center models systematically outperformed single-center models. Further, c-index in the pooled population was higher in SGB (0.735) than in CoxNet (0.694). In the precision-recall (PR) analysis for predicting 10-year HF risk, the stacking method, combining the SGB, CoxNet, Gaussian mixture and PCP-HF models, outperformed other models with PR/AUC 0.804, while PCP-HF achieved only 0.551.ConclusionWith a greater number and variety of training cohorts, the model learns a wider range of specific individual health characteristics. Flexible ML algorithms can be used to capture these diverse distributions and produce more precise prediction models.