We present a novel decision-making framework for accelerated degradation tests and predictive maintenance that exploits prior knowledge and experimental data on the system's state. As a framework for sequential decision making in these areas, dynamic programming and reinforcement learning are considered, along with data-driven degradation learning when necessary. Furthermore, we illustrate both stochastic and machine learning degradation models, which are integrated in the framework, using data-driven methods.
View Article and Find Full Text PDFProbl Sotsialnoi Gig Zdravookhranenniiai Istor Med
November 2023
The analysis of basic medical and demographic indicators (primary morbidity and disability of adult population, mortality, age structure and life expectancy) and provision of medical care in the Republic of Karelia in 2011-2020 was carried out. It established consistently high level of primary morbidity of population with respiratory diseases; injuries, poisoning and other consequences of external causes; diseases of genitourinary system. Diseases of cardiovascular system and malignant neoplasms occupy leading positions in the structure of causes of disability and mortality of population during period under review.
View Article and Find Full Text PDFThe paper considers the new effects of the nanoscale state of matter, which open up prospects for the development of electronic devices using new physical principles. The contacts of chemically homogeneous nanoparticles of yttrium-stabilized zirconium oxide (ZrO2—x mol% Y2O3, x = 0, 3, 4, 8; YSZ) with different sizes of 7.5 nm and 9 nm; 7.
View Article and Find Full Text PDFThe dimensional effect of electric charge storage with a density of up to 270 μF/g by the hydrated ZrO-nanoparticles system was determined. It was found that the place of localization of different charge carriers is the generalized heterophase boundary-nanoparticles surface. The supposed mechanism of the effect was investigated using the theory of dispersed systems, the band theory, and the theory of contact phenomena in semiconductors, which consists of the formation of localized electronic states in the nanoparticle material due to donor-acceptor interaction with the adsorption ionic atmosphere.
View Article and Find Full Text PDFA liquid biopsy based on circulating small extracellular vesicles (SEVs) has not yet been used in routine clinical practice due to the lack of reliable analytic technologies. Recent studies have demonstrated the great diagnostic potential of nanozyme-based systems for the detection of SEV markers. Here, we hypothesize that CD30-positive Hodgkin and Reed-Sternberg (HRS) cells secrete CD30 + SEVs; therefore, the relative amount of circulating CD30 + SEVs might reflect classical forms of Hodgkin lymphoma (cHL) activity and can be measured by using a nanozyme-based technique.
View Article and Find Full Text PDFWe examined postoperative material from 28 patients aged 39-61 years with gliomas of different degrees of anaplasia (the diagnosis was histologically verified according to the WHO classification of CNS tumors) who had not previously received antitumor treatment. In glioma tissue, the glucose concentration was significantly higher than in the brain tissue of subjects dead from traumas (control), while lactate concentration did not differ from that in the control group or was lower. Hexokinase activity demonstrated a tendency to an increase in grade I and significant elevation in grades II and III, while in grade IV gliomas, this parameter did not differ from the control.
View Article and Find Full Text PDFVesicular miRNA has emerged as a promising marker for various types of cancer, including prostate cancer (PC). In the advanced stage of PC, the cancer-cell-derived small extracellular vesicles (SEVs) may constitute a significant portion of circulating vesicles and may mediate a detectable change in the plasma vesicular miRNA profile. However, SEVs secreted by small tumor in the prostate gland constitute a tiny fraction of circulating vesicles and cause undetectable miRNA pattern changes.
View Article and Find Full Text PDFPurpose: Developing new and efficient approaches for the early diagnosis of colorectal cancer (CRC) is an important issue. Circulating extracellular nanovesicles (ENVs) present a promising class of cancer markers. Cells of well-differentiated adenocarcinomas retain the molecular characteristics of colon epithelial cells, and the ENVs secreted by these cells may have colon-specific surface markers.
View Article and Find Full Text PDFThe quantification of the specific disease-associated populations of circulating extracellular membrane nanovesicles (ENVs) has opened up new opportunities for liquid biopsy in cancer and other chronic diseases. However, the sensitivity of such methods is mediated by an optimal combination of the isolation and labeling approaches, and is not yet sufficient for routine clinical application. The presented study aimed to develop, characterize, and explore a new approach to non-specific ENV staining, followed by size-exclusive chromatography (SEC), which allows us to increase the sensitivity of bead-assisted flow cytometry.
View Article and Find Full Text PDFExosomes are a type of extracellular vesicles (EVs) secreted by multiple mammalian cell types and involved in intercellular communication. Numerous studies have explored the diagnostic and therapeutic potential of exosomes. The key challenge is the lack of efficient and standard techniques for isolation and downstream analysis of nanovesicles.
View Article and Find Full Text PDFBackground: The current approaches to distinguish follicular adenomas (FA) and follicular thyroid cancer (FTC) at the pre-operative stage have low predictive value. Liquid biopsy-based analysis of circulating extracellular vesicles (EVs) presents a promising diagnostic method. However, the extreme heterogeneity of plasma EV population hampers the development of new diagnostic tests.
View Article and Find Full Text PDFAim: To study liver function and portal hypertension, incidence and risk factors of liver-related complications, including hepatocellular carcinoma (HCC), in patients with HCV-related liver cirrhosis achieved sustained virologic response (SVR) after direct-acting antiviral therapy.
Materials And Methods: Patients with HCV-related liver cirrhosis were followed up after achievement SVR with assessment of liver function parameters, portal hypertension, Model for End-stage Liver Disease (MELD) and Сhild Pugh (CP) scores, complications development, including HCC, every 36 months. The median follow-up duration was 24 [18; 30] months after end of treatment.
Nowadays, computer experiments are used increasingly more to solve complex engineering and technological issues. Computer experiments are analysed through suitable metamodels acting as statistical interpolators of the simulated input-output data: Kriging is the most appropriate and widely used one. We optimise the braking performance of freight trains through computer experiments and Kriging modelling by focussing on the payload distribution along the train, so as to reduce the effects of in-train forces among wagons during a train emergency braking.
View Article and Find Full Text PDFThis study is a post-adoption follow-up of a social-emotional intervention in St. Petersburg, Russian Federation Baby Homes (BHs). Children previously resided in BHs and received Care as Usual (CAU, =220), Training Only (TO, =94), or Training plus Structural Changes (T+SC, =45).
View Article and Find Full Text PDFWe review a series of interrelated studies on the development of children residing in institutions (i.e., orphanages) in the Russian Federation or placed with families in the USA and the Russian Federation.
View Article and Find Full Text PDFThe current study addressed whether two institution-wide interventions in St. Petersburg, Russian Federation, that increased caregiver sensitivity (Training Only: TO) or both caregiver sensitivity and consistency (Training plus Structural Changes: T+SC) promoted better socioemotional and cognitive development than did a No Intervention (NoI) institution during the first year of life for children who were placed soon after birth. It also assessed whether having spent less than 9 versus 9 to 36 months with a family prior to institutionalization was related to children's subsequent socioemotional and cognitive development within these three institutions.
View Article and Find Full Text PDFThis study examined the effect of a social-emotional intervention implemented in one St. Petersburg (Russian Federation) institution (called a Baby Home, BH) on the general behavioral development of preterm children (gestational ages of 30-36 weeks) during their first two years of life. The intervention consisted of training caregivers and implementing structural changes to create a more family-like environment.
View Article and Find Full Text PDFThis report describes a secondary analysis of data from a comprehensive intervention project which included training and structural changes in three Baby Homes in St. Petersburg, Russian Federation. Multiple mediator models were tested according to the R.
View Article and Find Full Text PDFThis study examined whether interventions in Russian Baby Homes promoting warm, sensitive, and responsive caregiver-child interactions and relationships would be associated with advantages in those children's behavior years after they transitioned to family care. Children ( = 135) who had resided for at least 3 months ( = 13.8 months) in one of three intervention institutions were subsequently placed in Russian families (relatives or non-relatives) for at least 1 year ( = 33.
View Article and Find Full Text PDFCommunity-acquired pneumonia is one of prevalent infectious respiratory diseases. Adequate treatment of community-acquired pneumonia, with consideration of the disease severity and microbial resistence, remains extremely topical. The article covers contemporary views of community-acquired pneumonia treatment standards.
View Article and Find Full Text PDFA total of 149 children, who spent an average of 13.8 months in Russian institutions, were transferred to Russian families of relatives and nonrelatives at an average age of 24.7 months.
View Article and Find Full Text PDFBased on studies of certain gene-candidate polymorphism, the authors studied markers of early development and unfavorable course of pneumoconiosis in post-contact period. Analysis covered occurrence of genotypes and allels of I/D polymorphism of gene CCRS, 4a/b polymorphism of gene NOS3, VNTR polymorphism of gene ILRN, I/D polymorphism of CASP8 and mutation GLU342LYS (rs28929474) and GLU264VAL (rsl7S80) in gene SERPINAl in patients with various terms of pneumoconiosis formation. Findings are individual criteria of early formation and progress of pneumoconiosis in post-contact period.
View Article and Find Full Text PDFAnalyzing distribution of genotype polymorphism occurrence of Pro l98Leu gene of GPX1 (glutathion peroxidase) and Ala 16 Val gene of MnSOD (superoxide dismutase), the authors presented major mechanisms and leading pathogenetic factors of vibration disease formation and course in post-contact period. The article covers also results of metabolic processes evaluation in patients with varying resistence to occupational vibration, for forecasting its course after discontinued contact with the factor.
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