bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structural and functional state of the skin microcirculation in men with different phenotypes of hypertension of low and moderate cardiovascular risk
Authors: Korolev A. I. , Ososkov V. S. , Fedorovich A. A. , Chashchin M. G. , Dadaeva V. A. , Strelkova A. V. , Omelyanenko K. V. , Mikhailova M. A. , Gorshkov A. Y. , Drapkina O. M. 
Published: November 2024

Aim. To study the structural and functional state of skin microcirculation in working-age men with different phenotypes of hypertension (HTN) of low/moderate cardiovascular risk.Material and methods. A total of 218 healthy men underwent total blood count and biochemical blood tests, volumetric sphygmography, videocapillaroscopy, laser Doppler flowmetry at rest and with const­rictor and dilator tests, photoplethysmography, flow-mediated vasodilation of the brachial artery, cardiac and main artery ultrasound, 24-hour blood pressure (BP) monitoring. Based on the 24-hour BP monitoring, three following groups were formed: normal BP (NBP) group — 72 men, isolated diastolic hypertension (IDH) group — 70, systolic-diastolic hypertension (SDH) group — 76.Results. According to videocapillaroscopy and laser Doppler flow­metry, no reliable intergroup differences were found at the level of capillaries and precapillary arterioles. According to photoplethymography, men with SDH compared to the NBP group had higher AIp75 (augmentation index normalized to 75 bpm) (7,35 vs -5,4%; p<0,001), vascular age (VA) (49 vs 43 years; p<0,001) and reflection index (RI) (38 vs 29,1%; p<0,001), while patients with IDH had higher RI (35,3 vs 29,1%; p<0,001), respectively.Conclusion. Men with IDH and SDH do not have capillary rarefaction, tone changes, or constrictor and dilator activity of skin precapillary arterioles. Men with IDH and SDH are characterized by a higher tone of smooth muscle cells of terminal muscular arteries and distributing arterioles, and men with SDH also have higher arterial stiffness.
Comparative analysis of serum galanin levels in patients with coronary artery disease with and without heart failure with reduced ejection fraction and in individuals without cardiovascular diseases
Authors: Timofeev Yu. S. , Yafarova A. A. , Sheptulina A. F. , Kiselev A. R. , Metelskaya V. A. , Dubovskaya N. I. , Drapkina O. M. 
Published: November 2024

Aim. To study the level of the neuro-regulatory peptide galanin in pa­tients with coronary artery disease (CAD) with and without heart failu­re with reduced ejection fraction (HFrEF) in comparison with individuals without cardiovascular disease (CVD) included in the control group.Material and methods. The study included 80 male patients as fol­lows: 30 patients with CAD and HFrEF; 30 patients with CAD and without HFrEF; 20 individuals without CVD (control group). The groups were comparable in age and body mass index (BMI).Results. The median (Me) age of patients with CAD and HFrEF was 67,5 years, while in individuals without CVD — 56,5 years. In the CAD and HFrEF group, 73,4% of patients had New York Heart Association (NYHA) class II HF. The galanin level was significantly (p<0,001) higher in patients with CAD with HFrEF (Me [Q25-Q75] — 84,5 [62,2-96,2] pg/ml) and CHD without CHFrEF (82,9 [68,2-94,0] pg/ml compared to the control group (53,0 [24,4-62,9] pg/ml). According to the ROC analysis, the highest area under the curve (AUC=0,924) for galanin was in the CAD without HFrEF group relative to the control. At the estimated threshold level of 71,5 pg/ml, the sensitivity and specificity were 70,0% and 95,0%, respectively.Conclusion. The obtained results suggest an association between ga­la­nin and the pathophysiological mechanisms of CAD development, re­gardless of HFrEF.
Stress in individuals with noncommunicable diseases: ESSE-RF and ESSE-RF2 data
Authors: Gomanova L. I. , Balanova Yu. A. , Shalnova S. A. , Ivlev O. E. , Kutsenko V. A. , Evstifeeva S. E. , Imaeva A. E. , Kapustina A. V. , Karamnova N. S. , Kotova M. B. , Maksimov S. A. , Muromtseva G. A. , Shvabskaya O. B. , Yarovaya E. B. , Kontsevaya A. V. , Drapkina O. M. 
Published: November 2024

Aim. To determine the level and prevalence of stress in individuals with noncommunicable diseases (NCDs).Material and methods. Representative samples of the population aged 25-64 years from 17 regions of the Russian Federation (n=27950) were included, examined within the ESSE-RF and ESSE-RF2 studies. To assess stress, the Perceived Stress Scale-10 was used. Stress levels were defined as follows: low — 0-11, moderate — 12-19, high — 20-40. The presence of diseases was recorded by a positive answer to the question: "Has a doctor ever told you that you have/had the following diseases?". Hypertension was defined as systolic blood pressure (BP) ≥140 mm Hg, and/or diastolic BP ≥90 mm Hg, and/or taking antihypertensive drugs. Obesity was defined as a body mass index ≥30,0 kg/m2, while abdominal obesity — as a waist circumference ≥102 cm in men and ≥88 cm in women. Blood biochemical tests included lipid profile assessment.Results. The stress level in the entire sample varied from 15,0 (myo­cardial infarction) to 16,6 (rheumatoid arthritis). When analyzing by sex, the highest stress score in women was observed in coronary artery disease — 17,6, while in men — in rheumatoid arthritis (15,1), cerebrovascular accident (15,1). More than a quarter of men with coronary artery disease (25,8%), prior cerebrovascular accidents (26,4%) had a high level of stress, while women with these diseases — 40,6%. Among the entire sample, the presence of each NCD, except for myocardial infarction, was characterized by a significantly higher stress level compared to participants without the corresponding disease.Conclusion. In the Russian population, individuals with NCDs are cha­racterized by higher stress rates compared to individuals without the corresponding disease. Among women, both the level and prevalence of stress are higher, and the list of diseases affecting the mental well-being is wider compared to men.
Assessment of cardiac interoception using behavioral tests in patients with hypertension
Authors: Sukmanova A. A. , Minenko I. A. , Limonova A. S. , Guseynova K. A. , Bashankaeva Z. B. , Ershova A. I. , Drapkina O. M. 
Published: November 2024

Interoception is defined as the perception of body visceral signals. In recent years, clinical studies in this area have focused on patients with neurological and psychiatric disorders, while interoception in patients with cardiac pathologies remains poorly understood.Aim. The aim was to investigate cardiac interoception in patients with hypertension (HTN).Material and methods. The study included 38 patients with HTN aged 22-50 years and 38 healthy volunteers aged 26-50 years, matched for sex and age. Interoception was studied using the behavioral tests (mental tracking test and heartbeat detection test). Participants filled out questionnaires aimed at assessing the level of depression, anxiety, alexithymia and body perception.Results. No significant differences in interoceptive accuracy were found between patients with HTN and the control group. Among the patients, no significant correlations were found between interoception and mental or physiological characteristics (body mass index, blood pressure).Conclusion. The data obtained suggest that in middle-aged patients with HTN, an increase in interoception associated with high blood pressure is compensated by the formation of an interoceptive deficit. The observed effects are related to the etiology of the cardiac disorder and are not explained by the influence of additional psychological and physiological factors.
Factors associated with self-rated health in Black Canadians: A cross-sectional study
Authors: Boamah Sheila A. , Antabe Roger , Baidoobonso Shamara , Etowa Josephine , Djiadeu Pascal , Ongolo-Zogo Clemence , Husbands Winston , Mbuagbaw Lawrence 
Published: November 2024

Abstract
Objectives
Self-rated health (SRH) has shown to be a strong predictor of morbidity, functional decline, and mortality outcomes. This paper investigates the association between sociodemographic variables (e.g., employment, education, sex) and SRH among Black Canadians.

Methods
We used cross-sectional survey data (n = 1380) from the A/C (African Caribbean) Study of first- and second-generation Black Canadians in Toronto and Ottawa. Participants were invited to complete an electronic survey questionnaire in English or French in 2018–2019. Generalized linear model analyses were used to evaluate the associations among sociodemographic factors and self-rated quality of health.

Results
A total of 1380 self-identified Black individuals completed the survey and were included in the analysis. The majority of participants were under the age of 60 (89.7%), female (63.4%), born outside of Canada (75.1%), and residing in Toronto, Ontario (61.9%). The strongest association with poor SRH was found for difficulties accessing health care, sexual orientation, and substance misuse/disorder, while accessing/meeting basic needs was associated with better SRH, following adjustment for other socioeconomic conditions and lifestyle factors.

Conclusion
Our findings underscore the importance of improving the social determinants of health as a conduit to improving the general health status and the quality of life of Black Canadians. Results revealed that Black Canadians may be demonstrating high levels of resilience in circumventing their current social circumstances and structural disadvantages to live the best quality of life. Understanding sociodemographic and socio-structural barriers that Black people face is essential to reducing vulnerabilities to poor outcomes and improving their health and well-being.
Spectral and Photometric Studies of NGC 3516 in the Optical RangeSpectral and Photometric Studies of NGC 3516 in the Optical Range
Authors: Shomshekova Saule , Serebryanskiy Alexander , Kondratyeva Ludmila , Huseynov Nazim , Rahimli Samira , Kim Vitaliy , Aktay Laura , Aimuratov Yerlan 
Published: November 2024

(1) Background: NGC 3516 is an active Seyfert galaxy, which has become a focal point of astronomical studies due to its variable luminosity and emission lines, linked to the activity of its central supermassive black hole (SMBH). This paper presents an analysis of long-term observations from 2014 to 2024, including photometric and spectroscopic data collected at the Fesenkov Astrophysical Institute (FAI, Kazakhstan) and the Shamakhy Astrophysical Observatory (SHAO, Azerbaijan). The primary aim of this study was to investigate the changes in luminosity and spectral characteristics of NGC 3516, providing insights into the dynamics of the galaxy’s activity and its evolving chemical composition. (2) Methods: The research utilized photometric data in the B, V, R filters, along with spectroscopic observations in the wavelength range of λ4000 Å–λ7000 ÅThe spectroscopic data were normalized to analyze the profiles of emission lines and their variations over time. Broad emission line profiles (Hα and Hβ) were also analyzed to estimate radial velocities. A three-component model was applied, demonstrating a better statistical fit to the observed data, indicating a complex structure and dynamics within the galaxy’s Broad Line Region (BLR).; (3) Results: The main results of the study show that from 2018 to 2024, the brightness of NGC 3516 varied with amplitudes of ΔB=0.35 mag, ΔV=0.18 mag, ΔR=0.20 mag. An increase in brightness was observed in April 2020, likely associated with an X-ray flare detected simultaneously. Spectroscopic observations revealed a gradual weakening of the Hγλ4340 Å emission line starting from mid-2023. Narrow emission lines of [FeII] λ4814.53 Å and [FeVII] λ6087 Å were detected, indicating an active phase of the galaxy in May 2020. Photometric observations also revealed an increase in the object’s brightness in 2020. These observations suggest intriguing changes in the object’s activity, potentially indicating luminosity and chemical composition dynamics over the observed period. For the broad Hα line profile in the spectrum of NGC 3516, obtained with the AZT-8 on April 20, 2020, the radial velocity v=981−20+19 km/s. The radial velocity for the Hβ profile was 937−576+584 km/s; (4) Conclusions: Long-term observations of NGC 3516 have revealed significant changes in its luminosity and spectral characteristics, suggesting dynamic processes within the active nucleus of the galaxy. The observed variability in the broad emission line profiles could be linked to processes within the Broad Line Region (BLR) interacting with the SMBH and surrounding matter. These results may help in a more accurate estimation of the SMBH mass and provide deeper insights into the dynamics and evolution of active Seyfert galaxies.
SWOT Analysis of different Photovoltaic Panel Recycling Processes for the Brazilian reality
Authors: Branco Lucas C. C. , Santos Felipe S. 
Published: November 2024

Despite being considered a form of green energy, Photovoltaic panels face a logistical challenge when it comes to proper disposal. As the end-of-life for first-generation panels approaches, exploring methodologies more suitable for the Brazilian context is essential, as this technology has not yet been widely adopted. This study analyzed recycling treatment methods from photovoltaic modules using the SWOT analysis tool, focusing on the Brazilian economy scenario. It used bibliometric searching for methodology. The three main comminution methods—thermal, physical, and chemical—were discussed among the other methods available for photovoltaic panel recycling. Scenario identification was used to evaluate these methods by cross-referencing the factors of the SWOT matrix to determine how each technique fits into a growth, development, maintenance, and survival scenario. The study concluded that the most suitable treatment method for Brazil&#039;s reality is thermal treatment, explicitly utilizing the Solvothermal Expansion with Thermal Decomposition (SSTD) or Electrothermal method, chosen from 11 possible methods. It was found that all chemical and physical treatments can produce some form of toxic effluent/waste during the process. In contrast, thermal treatments are already widely commercialized and make the smallest number of toxic compounds, dependent only on the energy source.
Critical Thresholds for CO2 Foam Generation in Homogeneous Porous Media
Authors: Tang Jinyu , Wei Bing , Yang Mengke , Rossen William R. 
Published: November 2024

Summary
Long-distance propagation of foam is one key to deep gas mobility control for enhanced oil recovery and CO2 sequestration. It depends on two processes—convection of bubbles and foam generation at the displacement front. Prior studies with N2 foam show the existence of a critical threshold for foam generation in terms of a minimum pressure gradient ∇pgenmin or minimum total interstitial velocity vt,genmin, beyond which strong-foam generation is triggered. The same mechanism controls foam propagation. There are few data for ∇pgenmin or vt,genmin for CO2 foam.
We extend previous studies to quantify ∇pgenmin and vt,genmin for CO2 foam generation and, for the first time, relate ∇pgenmin and vt,genmin to factors including injected quality (gas volume fraction in the fluids injected) fg, surfactant concentration Cs, and permeability K. In each experiment, steady pressure gradient ∇p is measured at fixed injection rate and quality, with total interstitial velocity vt increasing and then decreasing in a series of steps. The trigger for strong-foam generation features an abrupt jump in ∇p upon an increase in vt.
In most cases, the data for ∇p as a function of vt identify three regimes, which are coarse foam with low ∇p, an abrupt jump in ∇p, and strong foam with high ∇p. The abrupt jump in ∇p upon foam generation confirms the existence of ∇pgenmin and vt,genmin for CO2 foam. We further show how ∇pgenmin and vt,genmin scale with fg, Cs, and K. Conditions that stabilize lamellae reduce the values of the thresholds: Both ∇pgenmin and vt,genmin increase with fg and decrease with increasing Cs or K. Specifically, ∇pgenmin scales with fg as (fg)2 and vt,genmin scales as (fg)4, and both ∇pgenmin and vt,genmin scale with Cs as (Cs)−0.4. The effect of K on the thresholds for foam generation is greater than the effects of fg and Cs. Our data in artificial consolidated cores show that ∇pgenmin scales with K as K−2 for CO2 foam, in comparison with K−1 for N2 foam in unconsolidated sand/bead packs. More data are needed to verify these correlations.
It is encouraging that ∇pgenmin in the cores with K = 270 md or greater is less than 0.17 bar/m (~0.75 psi/ft), two to three orders of magnitude less than for N2 foam. Such low ∇pgenmin can be easily attainable throughout a formation. This suggests that limited ∇p deep in formations is much less of a restriction for long-distance propagation of CO2 foam than for N2 foam. Foam propagation could still be challenging in low-K reservoirs (∇pgenmin ~10 bar/m for K = 27 md). Nevertheless, formation heterogeneity and alternating slug injection of gas and liquid help foam generation and can reduce the values of ∇pgenmin. More research is needed to predict long-distance propagation of foam at low ∇p and vt.
Proven Advanced Data Science Techniques for Improved Automated Lithology Classification Using Well Log Data
Authors: Kurmankulov Alikhan , Kurmankulova Zhanat 
Published: November 2024

Abstract
The proposed paper introduces a novel machine learning-based approach that incorporates advanced data pre- and post-processing techniques to significantly enhance automated lithology classification using well log data.
Through rigorous testing of various machine learning algorithms and data science methods, the final approach emerged as the optimal solution. It integrates advanced well log data visualization, exploratory data analysis (EDA) for feature selection and engineering, the use of the Random Forest algorithm for data pre-processing and classification, and advanced post-processing techniques to refine the predictions of the machine learning model. These post-processing steps are particularly novel, as they address the unique challenges of lithology classification in the petroleum industry.
The approach was developed during a company-wide hackathon with over fifty participants from around the globe. The objective was to design an accurate, automated system for predicting lithology using real-world well log data. The dataset included measurements from twenty wells with twelve interpreted facies and ten additional wells for evaluation. The complexity of the data, such as missing logs and incomplete measurements, mirrored real-world challenges. The proposed approach excelled in this context, achieving the highest competition score and securing first place in the hackathon.
This paper presents a proven method for automated facies classification using machine learning, validated by real field data. It underscores the importance of integrating domain expertise with advanced data science techniques, particularly post-processing, to deliver value in the age of AI to the petroleum industry.
Fluid Design for Acid Fracturing and Stimulation in HT Reservoirs Accounting for Cooldown Effect Based on Measurements and Simulation
Authors: Yudin A. , Rivas J. , Farouk M. , Al-Jalal Z. , Nurlybayev N. , Kharrat W. 
Published: November 2024

Abstract
Fracturing operations in tight reservoirs tend to be driven by efficiency and costs of the operations due to low reservoir quality and field development economics dictate the continuously increasing demand to deliver more stages within a short period of time. The objective of this paper is to revise and enhance fluid design parameters in high-temperature (HT) reservoirs by dealing away with fluid over-designing practices through accurate fracturing modeling which will significantly reduce reservoir damage.
Fluid design practices often assume a safety factor for the fluid exposure duration to be greater than the full treatment duration. It is also commonly required to match the bottom hole static temperature (BHST) for the whole lab test with a minor focus on the overall tubulars and reservoir cooldown during later stages of the treatment. The data frac results were then compared with the experimental lab condition in order to measure leak-off severity and cool-down dynamics in both scenarios. The result was injected into a detailed sensitivity analysis in order to come up with the optimum fluid design assumptions.
Advanced software modeling and rheological studies identified several ways to avoid fluids overdesign, leaving behind cleaner reservoirs without imposing operational risks. The sensitivity analysis revealed that depending on several parameters such as the fluids temperature at surface, volume and rate of the treatment; the safety factor applied in typical laboratory practice may reach up to 300% for some additives in the acid systems. This translates into additional challenges to formulate the fracturing fluid for excessive exposure periods, which as proven in lab experimental conditions, is not really required. Even more, the excess treatment chemicals create significant reservoir damage. The studies provided a workflow describing how and where fluid design can be tailored to reservoir conditions and a decision tree for fluid design in extreme HT formations.
This paper will reveal a modeling and experimental approach to optimizing assumed parameters of the fracturing and stimulation fluids and will help to shape the future of the treatments in HT reservoir conditions in a way that will not only reduce the fracturing cost but will also help to reduce reservoir damage hence improving well productivity.