bluuebunny/crossref_metadata_2025_split huggingface dataset:
Distribution of rare and endangered terrestrial mollusks in Central Uzbekistan
Authors: Makhmudjonov Zafar M. , Pazilov Abduvaeit , Karimqulov Abdulla T. , Gaibnazarova Feruza P. , Umarov Farrukh U. , Karshibaev Jakhongir Kh. , Yuldashov Abrorjon U. , Allaeva Lobarkhon 
Published: May 2024

Abstract

The purpose of the research is to analyze the distribution, anatomical and morphological aspects of dryland mollusks found in the Central Uzbekistan region, and to provide information on their ecology, distribution, limiting factors, and conservation measures. The material collection was carried out according to the methodology of A.A. Shileyko. Based on the results of the collected research, it can be concluded that due to the necessity of moisture for mollusks in the ecological complex, they can be classified into three major groups: hygrophilous, mesophilous, xerophilous, and mesoxerophilous species. The research results indicate that out of the 7 species found in the Central Uzbekistan region, currently, 28.75% are classified as critically endangered, approximately 42.85% are considered vulnerable, and 28.75% are endangered. The dryland mollusk species found in the Central Uzbekistan region are categorized ecologically into hygrophilous, xerophilous, and mesoxerophilous types. In order to conserve and monitor the population of dryland mollusk species in the Central Uzbekistan region, it is recommended to first protect their habitats, particularly by halting deforestation and degradation of habitats where mollusks reside, secondly, to restrict extraneous use of these areas as pastures, and thirdly, to undertake research on their habitat preferences and biology to prevent their extinction as a species.
Algebraic Results of Centralizers in Associative Algebras
Authors: Martinez Wilson Arley , Ceron Samin Ingrith 
Published: May 2024

Abstract

In this document, we explore the algebraic properties of the centralizeror multiplier in different types of algebras, aiming to discern patternsand relationships. We introduce concepts such as Focal Algebra, NijenhuisOperator, and Reynolds Operator, and provide illustrative examples of theselinear applications within associative algebras defined by a left or right identityelement.
Furthermore, we investigate the interaction between the centralizer andthe construction of specific algebraic structures within the framework of nonassociativealgebra theory. Essentially, these operators applied to certain associativealgebras give rise to non-associative algebraic structures, such as LieAlgebras or Dendriform Algebras. Our main achievement lies in the constructionof non-associative algebras, particularly dendriform algebras, derived fromassociative algebras in conjunction with a centralizer. For each construction,we provide concrete examples of non-associative algebras within subspaces ofsquare matrices.
Test and Identification Analysis of Wear Response Signal of Contact Interface of Rotary Seal
Authors: Lu Junjie , Zheng Shize , Zhang Xuechang , Hou Yaochun 
Published: May 2024

Abstract

The wear state of mechanical seal friction pair directly determines the reliability of mechanical seal. In this paper, the mapping mechanism between contact wear response and acoustic emission (AE) energy signal of friction pair is indicatively proposed, and the relationship between wear frequency and time-averaged wear is explored. First of all, AE sensors are arranged on the mechanical seal friction test-bed, static and dynamic friction tests are carried out on the contact form of M106K-WC (graphite-cemented carbide) and WC-WC, the AE energy signal data are collected, and the wear amount of the two groups of friction pairs is measured; then, the friction and wear signals are separated and reprocessed by time-frequency analysis. The results show that the static wear response frequency (SWRF) of M106K -WC is about 70 ± 10 kHz, the SWRF of WC-WC is about 90 ± 10 kHz, and the dynamic wear response frequency (DWRF) of WC-WC is about 175 ± 10 kHz;. At the same time, the root mean square of DWRF is positively correlated with the wear amount. According to the research results, it is inferred that there is a difference between the quasi-static wear frequency and the dynamic wear frequency of the friction pair, there is a great correlation between the dynamic wear frequency and the material pair, and the working condition has little influence on the wear frequency. the mapping relationship between AE signal and time-averaged wear of friction pair is revealed.
Moderate-to-severe sleep disturbance is associated with higher cardiovascular risk among aging rural Indians
Authors: Rai Pooja , Sundarakumar Jonas S. 
Published: May 2024

Abstract

Disturbed sleep could be associated with adverse health effects including a potentially increased risk for cardiovascular disease. However, there is a dearth of research on this topic among aging Indians, particularly from rural areas. This study aimed to cross-sectionally examine the relationship between self-reported sleep disturbance (assessed using the Pittsburgh Sleep Quality Index) and cardiovascular risk (assessed using the Framingham Cardiovascular Risk Score) in a large sample (n = 2838) of aging, non-demented, Indians from the villages of Srinivaspura (Karnataka) in southern India. Linear regression models were used to assess the above association, adjusting for potential confounders, such as age, gender, Body Mass Index (BMI), tobacco use, alcohol use, depression and number of comorbidities. We found that in the fully adjusted model, subjects with moderate-to-severe sleep disturbance had twice the odds of CVD risk as compared to those with no sleep disturbance (AOR: 2.17, CI:1.14–4.13). Early identification and management of sleep disturbance using lifestyle management, better sleep hygiene and in some cases, medication could be a cost-effective, public health strategy to reduce cardiovascular risk.
FUR-HABE:A Hierarchical CP-ABE Scheme with Traceable Fine-grained User Revocation for Cloud Storage
Authors: Yang Xiaohui , Tao Ya'nan 
Published: May 2024

Abstract

An effective method to protect cloud data is access control. But, the efficiency of key distribution by a single authority is low, and it is difficult to achieve dynamic attribute revocation when system properties are shared by multiple users. Existing attribute revocation mechanisms face challenges in terms of functional complexity and computational efficiency, which hinder their practical application. To address these issues, this paper put forward a Hierarchical CP-ABE scheme with Traceable Fine-grained User Revocation for Cloud Storage (FUR-HABE). In this scheme, most of the decryption calculations are outsourced to cloud servers. It employs a layered key authorization mechanism to provide flexible and scalable key delegation. Additionally, the scheme supports key encapsulation key (KEK) attribute revocation and user revocation to accommodate different revocation needs, enabling flexible revocation. Experimental results show that the proposed scheme is proven to be IND-CPA secure under the chosen plaintext attack strategy based on the decision-making q-BDHE assumption in the standard model. Compared to related work, this scheme exhibits superiority.
Parameter optimization method of injection molding process based on genetic algorithm and support vector machine regression
Authors: Shan Zhi 
Published: May 2024

Abstract

In response to the prevalent reliance on engineer experience for the adjustment of injection molding process parameters, this study presents an innovative approach which combines Genetic Algorithms (GA) and Support Vector Machine Regression (SVR) to address this challenge. The input variables consist of the process parameters, while the output variable pertains to defects in the molded product. SVR is employed to construct predictive models for these defects, subsequently serving as the fitness function within the GA framework. GA, in turn, is utilized to iteratively determine the optimal injection molding process parameters. To alleviate issues related to overfitting and underfitting, the SVR prediction model was optimized using PSO in combination with five-fold cross-validation. Through this iterative optimization, the SVR model is improved, thereby improving its prediction accuracy. A case study involving automobile mesh confirms the method's effectiveness in reducing defects, showcasing its industrial applicability.
Two-dimensional Czochralski growth of single-crystal MoS2
Authors: Zhang Yue , Jiang He , Zhang Xiankun , Chen Kuanglei , He Xiaoyu , Liu Yihe , Gao Li , Yu Huihui , Hong Mengyu , Wang Yunan , Zhang Zheng 
Published: May 2024

Abstract

Batch production of single-crystal two-dimensional (2D) transition metal dichalcogenides is one prerequisite for the fabrication of next-generation integrated circuits (IC). Contemporary strategies for the wafer-scale high-quality crystallinity of 2D materials center on merging the unidirectionally aligned different size domains. However, the imperfectly merged area with translational lattice brings about high defect density and low device uniformity, which restricts the application of 2D materials. Here, we take the lead in establishing the 2D Czochralski method that can rapidly grow wafer-scale, single-crystal MoS2 with no grain boundaries. The method relies on a liquid-liquid interface spreading mechanism, which eventually realizes the Czochralski method in 2D materials growth. Specifically, a 2D intermediate liquid (Na2Mo2O7) film is formed through a eutectic reaction on an atomically smooth surface before sulfurization, leading to an ultralow nucleation density, an ultrafast crystallization rate (75 μm s-1), and thus producing large single-crystal MoS2 with the record domain size larger than 1.5 cm. Meanwhile, the 2D Czochralski method produces an ultra-clean, fast, and high-quality transfer process facilitated by the significantly reduced adhesion between the MoS2 crystal and the atomically smooth substrate. The obtained MoS2 large single-crystal shows superb uniformity and high quality with an ultralow defect density of 2.9×1012 cm-2, a high mobility of 105.4 cm2 V-1 s-1, and a saturation current of 443.8 μA μm-1 in the short-channel devices. A statistical analysis of 192 field-effect transistors within a centimeter-scale domain showed a 96.4% device yield and a 15.9% variation in mobility with a minimal variation of 15.9%, positioning itself as an advanced standard monolayer MoS2 device. This 2D Czochralski method provides fruitful implications for fabricating high-quality and scalable 2D semiconductor materials and devices.
Platelet link of hemostasis in polymorbid patients with acute coronary syndrome and COVID-19
Authors: Kadnikov L. I. , Izmozherova N. V. , Popov A. A. , Antropova I. P. 
Published: May 2024

Introduction. Platelets play an important role in arterial thrombosis, and the effects of SARS-CoV-2 on platelets contribute to an increased risk of thrombosis.Aim. To evaluate platelet link of hemostasis system and polymorbidity in patients with acute coronary syndrome and COVID-19 at the time of admission to the hospital.Materials and methods. The case-control study included 96 pairs of patients with acute coronary syndrome (ACS). The groups were adjusted by gender, age and diagnosis of ACS. Group 1 had ACS and COVID-19, Group 2 had ACS without COVID-19. Blood indicators were examined using the Mindray BC-5150 and ABX Micros-60 automatic hematology analyzers, the results of which were comparable Statistica 13.0 environment was used for statistical processing. The study was approved by the Local Ethics Committee of Ural State Medical University by Protocol No. 9 dated 10.22.2021.Results. Platelet level (PLT) was 242 (178÷299) x 109/L Group 1 and 236 (199÷291) x 109/L, in Group 2, p = 0.927. Mean platelet volume (MPV) was 10.0 (9.3÷11.5) fl in Group 1 and 8.0 (7.6÷8.8) fl, in Group 2, p < 0.001. Platelet distribution width (PDW) was 16.2 (15.9÷16.4) in Group 1, and 15.7 (14.7÷16.7) in Group 2, p < 0.001. Plateletcrit (PCT) was 0.24 (0.18÷0.30)% in Group 1 and 0.19 (0.16÷0.24)% in Group 2, p < 0.001. Platelet-to-lymphocyte ratio (PLR) 159.4 (109.5÷232.9) in Group 1 and 118.4 (88.2÷158.1) in Group 2, p < 0.001. The Charlson polymorbidity index in Group 1 was 5 (4÷6) points, in Group 2 – 4 (4÷6) points, p = 0.047.Conclusions. Higher PDW, MPV, PCT values with the same PLT, higher PLR level and higher polymorbidity at the time of hospitalization may indicate more pronounced platelet activation due to inflammation, severe immunosuppression and concomitant diseases in patients with COVID-19.
Acute respiratory infections of the upper respiratory tract, aspects of mucoactive therapy
Authors: Korkmazov M. Yu. , Kornova N. V. , Lengina M. A. , Korkmazov A. M. 
Published: May 2024

Introduction. Acute laryngotracheitis occurs at any age and is a complication of acute respiratory infection with a frequency of up to 40%. One of the main clinical symptoms is an unproductive paroxysmal cough. According to the literature, phytotherapy is a safe and effective part of conservative therapy and is included in clinical recommendations.Aim. To evaluate the effectiveness of the use of mucolytic phytopreparations in the treatment of acute respiratory infection complicated by laryngotracheitis.Materials and methods. A randomized simple controlled clinical trial was conducted in which 74 patients aged 18 to 45 years with acute laryngitis complicated by laryngotracheitis participated. All patients were randomly divided into 3 groups: group 1 (n = 24) received standard conservative therapy without mucolytic expectorants; group 2 (n = 25) – standard conservative therapy and acetylcysteine; group 3 (n = 25) – standard therapy using a herbal preparation based on ivy leaf extract in the form of syrup. Assessment of the severity of the main clinical symptoms and quality of life was carried out on the 5th, 7th and 10th day of therapy.Conclusions. The use of ivy leaf extract, which has a mucolytic and expectorant effect in complex therapy in patients with acute laryngotracheitis against the background of acute respiratory viral infection, allowed us to obtain stable positive dynamics in a shorter time (5th day of treatment) with the disappearance of all the main clinical symptoms on the 7th day.
Topical therapy of acute viral rhinosinusitis in case of incomplete epithelialization of surgical wound during the long-term period of adenoid surgery
Authors: Kiselev A. B. , Chaukina V. A. , Krasnov V. A. , Ikonnikova E. V. 
Published: May 2024

Acute respiratory infection (ARI) of the upper respiratory tract with incomplete epithelialization of the nasopharynx after surgery of the pharyngeal tonsil using cold sodium plasma is a little-studied problem.Aim. To evaluate the clinical efficacy and adequacy of topical therapy of acute viral rhinosinusitis with 2% silver proteinate (Sialor® preparation, tablets for preparation of a solution for topical use, 200 mg, in a bottle with a spray nozzle) instead of using systemic and local antibiotic therapy in the period of incomplete epithelialization of an operating wound after surgical treatment of chronic adenoiditis associated with hypertrophy of the pharyngeal tonsil, by physical factors of destruction of lymphadenoid tissue.Materials and methods. We observed 64 patients who underwent surgical intervention in the site of the pharyngeal tonsil using different techniques. The epithelization status of the surgical wound in the nasopharynx was visualized using 2.4 mm flexible rhino-laryngo fiberscope examination of the nasopharynx performed on postoperative days 10, 20 and 30. We assessed the frequency rates of ARI during the first month follow-up period and the features of the clinical course of ARI according to the patient’s diary. The treatment included on-demand topical therapy with decongestants and Sialor (2% silver proteinate). Results and discussion. The duration of ARI and the severity of nasal symptoms are comparable to the course of mild to moderate ARI in children with preserved pharyngeal tonsil.Conclusion. Sialor topical therapy is an adequate choice instead of local and systemic antibiotic therapy to suppress the pathogenic microflora activity in ARI, to provide a local anti-inflammatory effect during the long-term period of pharyngeal tonsil surgery with incomplete epithelization. The incomplete epithelization of the nasopharynx is not an indication to administer systemic antibiotics in the presence of signs of ARI of the upper respiratory tract after pharyngeal tonsil surgery.
Antiseptic and hygienic preparation of patients for ear surgery with an endaural approach
Authors: Suaifan W. H.A. , Eremeeva K. V. , Morozova S. V. 
Published: May 2024

Introduction. Optimization of preoperative preparation protocols in otosurgery can reduce intraand postoperative infectious complications, improve surgical outcomes, which is important for the rehabilitation of patients with ear diseases.Aim. To determine the effectiveness of antiseptic and hygienic preoperative preparation of the surgical field during endaural otosurgical interventions.Materials and methods. The randomized study included 183 patients who underwent surgery via the endaural approach. The first part of the study evaluated the effect of 10% povidone-iodine solution treatment on the skin microbiome; the second part evaluated the need for ear canal depilation and before surgery and compared the methods.Results. Examination of skin microbiota of the external auditory canal in 85% revealed the growth of microorganisms:Staphylococcus – 115 (85.5%), fungal growth – 6 (4.4%), Corynebacterium – 8 (5.9%), etc. Microbial growth was not detected in 15%. Antiseptic treatment with 10% Povidone-iodine solution with endaural access reduces the degree of contamination and suppresses the growth of microorganisms in more than one third of patients. Inflammatory changes of the postoperative wound correspond to the degree of inflammation IA in both control and study groups. After depilation, visualization was assessed as optimal in 100% of cases and no inflammatory reactions were found. Average depilation time with scissors 113 sec, with an ear trimmer 32 sec.Conclusions. Preoperative antiseptic preparation reduces microbial contamination of the skin via endaural access, with no significant impact on wound healing process in the postoperative period. Depilation improved the view of the operative field in 100% of cases. Depilation with an ear trimmer is 3.5 times faster than with scissors.
Terlipressin using for intraoperative bleeding reduction during endoscopic rhinosinus surgery
Authors: Arustamyan I. G. , Pavlov V. E. , Polushin Yu. S. , Karpishchenko S. A. , Stancheva O. A. , Efimenko G. A. 
Published: May 2024

Introduction. Endoscopic rhinosinus surgery stands out for its reduced complications and marked symptomatic improvement compared to open surgical approaches. However, local bleeding challenges may compromise the efficacy of minimally invasive procedures. Exploring terlipressin’s application in endoscopic rhinosinus surgery is a promising avenue, given its mechanism of action and successful use in obstetric and other medical practices.Aim. This study aimed to assess terlipressin’s efficacy in reducing intraoperative bleeding during endoscopic rhinosinus surgical interventions under general anesthesia.Materials and methods. A prospective randomized cohort study included 170 cases of endoscopic rhinosinus surgical interventions. The BT group (n = 89) received no terlipressin, while the T group (n = 81) had 200 mcg of terlipressin during surgery. Bleeding intensity was assessed on a 6-point scale. Heart rate, blood pressure, perfusion index, and bleeding intensity were recorded at 10th, 30th, and 60th minute into the operation (study points). Bleeding intensity ≥2 points was considered significant. Results. In the T group, mean BP was significantly higher at all study points than in the BT group. Perfusion index values in the terlipressin group were significantly lower throughout. ROC analysis highlighted perfusion index’s prognostic value at 30th and 60th minutes for predicting significant bleeding. Threshold perfusion index values associated with increased bleeding probability were 4.520 at 30th minutes and 5.040 at 60th minute. Multifactorial analysis linked intraoperative terlipressin administration to a lower likelihood of significant intraoperative bleeding.Conclusion. Intravenous terlipressin (200 mcg) effectively reduces intraoperative bleeding intensity without lowering arterial pressure during endoscopic rhinosinus surgical interventions under general anesthesia.
Management of a patient at very high cardiovascular risk with myositis during high-intensity statin therapy
Authors: Sedykh D. Yu. , Kashtalap V. V. , Barbarash O. L. 
Published: May 2024

The main purpose of this article is to translate the existing experience of successful optimization of lipid-lowering treatment in a patient with a very high cardiovascular risk and a long history of dyslipidemia, cerebral atherosclerosis and myositis, which developed on a high-intensity statin therapy regimen. Using the example of a 56-year-old patient observed in the lipid center of the city of Kemerovo, it was shown that the combination of pitavastatin in the maximum tolerated dose of 2 mg and the cholesterol absorption inhibitor ezetimibe 10 mg can not only be effective in achieving target values of low-density lipoprotein cholesterol (1.4 mmol/l) after undergoing carotid revascularization, but also safe for registered muscle symptoms that arose during a high-intensity statin therapy regimen. It was demonstrated that, against the background of high adherence to the selected treatment and low-cholesterol diet, and maintenance of regular physical activity, the patient completely disappeared both muscle pain and muscle weakness, and there was no clinical or instrumental progression of cerebral stenosis. The article provides current data on the prevalence of muscle symptoms when taking statins in real practice and in randomized clinical trials, discusses existing predisposing factors and potential mechanisms of occurrence, describes variants of clinical manifestations and tentative diagnostic search criteria. In addition, recommendations on the tactics of managing patients with their development at various cardiovascular risks have been systematized. An expert classification system for statin-associated muscle symptoms is demonstrated. Also presented is the routing of patients with side effects developing during statin therapy, adopted in the city of Kemerovo.