Changes In Period Research Articles

Speech Act as a Factor of Socio-Political Change: Stating the Problem

The purpose of this study is to pose the problem of analyzing the relationship between conceptual (linguistic) and social changes, as well as to reveal the role of socio-political speech action of political theorists as key actors in these processes. The article considers the issues of the construction and changes of social and political reality, as well as the role of speech acts in these processes as a special type of social action. According to J. Searle’s general theory of social reality, speech acts are seen as the basis and a necessary condition for socio-political changes. The structure and elements of speech acts are described within the framework of J. Austin’s theory of speech acts, supplemented and formalized by Searle. The article discusses the influence of this theory on the formation of the theoretical and methodological approach of the Cambridge School of Intellectual History, used to understand the analysis of socio-political changes in various societies and historical periods. As an example of such research, the article describes the main elements of the approach of one of the Cambridge School’s founders Quentin Skinner. The analytical tools used by Skinner and his colleagues help to understand the connection between conceptual and social changes in the history of political thought. Considering political theorists as ideologists, Skinner explains through the analysis of political languages and ideological context how authors-ideologists, using statements that are the basis of their theoretical concepts and rhetoric, intentionally take certain actions that change the social reality. The possibilities, attempts and prospects of applying the Cambridge School’s methodology to the Russian history are also considered.

Multi-temporal analysis of land use change using GIS and satellite imagery: Implications for sustainable urban planning

Urbanization is a significant driver of land use change, particularly in rapidly growing metropolitan areas. This research investigates Greenfield City land use change in the 20-year period (2000-2020) using GIS and satellite data. The mapping shows where the greatest land-use changes occurred, ranging from increased residential and commercial developments to the loss of agricultural fields and the omission of green space. The work applies multi-temporal analyses of Landsat satellite images taken in 2000, 2010 and 2020 to estimate land cover change and its effects on urban planning and sustainability. They indicate that theres a clear rise in housing and business developments, but also a steep decline in farming and greenspace. These transformations affect the environment, with habitat loss, biodiversity destruction and encroachment on natural resources. The paper wraps up by focusing on the issues of sustainability in urban planning and how better land use planning is required to reduce the negative environmental effects of urban sprawl.

Temporal comparison of radiological and functional outcomes in calcaneal fracture surgery with and without iliac crest graft application: Mid- to long-term results

BackgroundThe standard approach for addressing intra-articular calcaneal fractures involves open reduction with plate and screw fixation, with ongoing discourse regarding the application of grafts to address bone gaps. The aim of this study is the temporal comparison of the radiological and functional outcomes in patients undergoing surgery for intra-articular calcaneal fractures, with a specific focus on the use of bone grafts.MethodsThirty patients, comprising 13 with iliac grafts and 17 without, were enrolled in the study. Preoperative and postoperative assessments included Gissane and Böhler angles, Visual Analog Scale (VAS) scores, American Orthopedic Foot and Ankle Society (AOFAS) ankle hindfoot scale, and Kellgreen-Lawrance subtalar arthrosis stages. The average follow-up period was 6.7 years, ranging from a minimum of 3.5 to a maximum of 10 years.ResultsThe Böhler angle exhibited a significant increase (p < 0.001), while the Gissane angle did not show significant changes in the early postoperative period across the entire study group (p = 0.1). Graft-treated patients demonstrated a significantly higher Böhler angle in the early and late postoperative periods compared to preoperative values (p = 0.04, p = 0.05). Similarly, patients without grafts exhibited a significantly higher Böhler angle in the early and late postoperative periods compared to preoperative values (p = 0.004, p = 0.002). No significant differences were observed between periods in Gissane measurements (p = 0.3), VAS scores, AOFAS scores, and the development of subtalar arthrosis in both grafted and non-grafted patients.ConclusionsEvaluation of patients with calcaneal fractures, both with and without grafts, was conducted using Böhler and Gissane angles, VAS scores, AOFAS scores, and the development of fracture union and subtalar arthrosis, assessing preoperative, early, and late postoperative periods. No significant differences were found between the two groups in terms of clinical and radiological outcomes during mid-to long-term follow-up.Level of evidenceA retrospective cohort study.

Study of the dynamics of magnetic particles in rotating magnetic field: A 3D finite element analysis

The analysis of magnetic particle dynamics in a rotating magnetic field and the exploration of the magnetic agglomeration mechanism are crucial for effectively reducing agglomeration in strong magnetic minerals and improving sorting efficiency. The forces acting on magnetic particles in a rotating magnetic field were analyzed in this study. A 3D model was built to simulate the complex interaction between two magnetic particles in a rotating magnetic field using COMSOL Multiphysics finite element simulation software. It shows that the number of periods of change in the spiral period, velocity, and acceleration remains consistent under different conditions. Additionally, their period numbers are positively correlated with magnetic field rotational speed, medium viscosity, and the initial particle spacing, and negatively correlated with magnetic field strength. Under various conditions, the larger the area of the velocity-closed surface in the same cycle, the larger the helical diameter of the particle trajectory. The initial acceleration of the particles exhibits a positive correlation with the strength of the magnetic field, a negative correlation with the viscosity of the medium and the initial distance, and no significant relationship with the rotational speed of the magnetic field. For further research on the dynamics of magnetic particles and the refinement of the mechanism of magnetic agglomeration, the results have an important theoretical reference value.

Supplemental palmitic acid and chromium propionate impact production responses during the immediate postpartum in multiparous dairy cows.

Forty-eight multiparous Holstein cows were used in a randomized complete block design and assigned to one of 4 treatments in a 2x2 factorial arrangement of treatments to determine the effects of supplemental palmitic acid (C16:0) and chromium (Cr) on production responses of early-lactation cows. During the fresh period (FR; 1-24 d in milk), cows were fed one of 4 treatments: (1) a diet containing no supplemental C16:0 or Cr (CON); (2) diet supplemented with an 85% C16:0-enriched supplement (PA); (3) diet supplemented with Cr-propionate (CR); and (4) diet supplemented with a C16:0-enriched supplement and Cr-propionate (PACR). The C16:0-enriched supplement was added at 1.5% of diet DM by replacing soyhulls in the C16:0-supplemented diets, and the Cr-propionate supplement (0.45 mg Cr/kg of diet DM) was administered through the vitamin and mineral mix. During the carryover period (CO; 25-56 d in milk), a common diet was offered to all cows to evaluate the carryover effects of the treatment diets. Palmitic acid and Cr supplementation interacted with time during the treatment period, with the supplemented diets increasing the yields of ECM, 3.5% FCM, and milk fat to a greater extent during the first 2 weeks of lactation compared with CON. By the third week of lactation, C16:0 supplemented diets also increased milk fat yield compared with CR. Additionally, C16:0 and Cr interacted with time in the treatment period to influence plasma insulin, nonesterified fatty acid (NEFA), and BHB. Overall, C16:0 supplementation increased the yields of milk fat, ECM and 3.5% FCM, and decreased milk protein content in the treatment period. Overall, Cr supplementation increased the yields of milk, milk protein, and milk lactose in the treatment period. Additionally, Cr supplementation interacted with time, increasing the yields of milk, milk protein, and milk lactose during the CO period. We did not observe treatment differences for DMI and plasma glucose during the FR period, and no treatment effects on BW, BW change and BCS change in FR or CO periods. In conclusion, C16:0 and Cr supplementation interacted during the early postpartum period to impact milk production responses compared with a non-supplemented diet. Feeding Cr during the immediate postpartum had a carryover effect, improving milk production responses after ceasing feeding the treatment diets.

Talbot effect based sensor measuring grating period change in subwavelength range

Talbot length, the distance between two consecutive self-image planes along the propagation axis for a periodic diffraction object (grating) illuminated by a plane wave, depends on the period of the object and the wavelength of illumination. This property makes the Talbot effect a straightforward technique for measuring the period of a periodic object (grating) by accurately determining the Talbot length for a given illumination wavelength. However, since the Talbot length scale is proportional to the square of the grating period, traditional Talbot techniques face challenges when dealing with smaller grating periods and minor changes in the grating period. Recently, we demonstrated a Fourier transform technique-based Talbot imaging method that allows for controlled Talbot lengths of a periodic object with a constant period and illumination wavelength. Using this method, we successfully measured periods as small as a few micrometers and detected sub-micrometer changes in the periodic object. Furthermore, by measuring the Talbot length of gratings with varying periods imaged through the combination of a thick lens of short focal length and a thin lens of long focal length and large aperture, we determined the effective focal length of the thick lens in close agreement with the theoretical effective focal length of a thick lens in the presence of spherical aberration. These findings establish the Talbot effect as an effective and simple technique for various sensing applications in optics and photonics through the measurement of any physical parameter influencing the Talbot length of a periodic object.

The Relevance Of Election Organizing Institutions In Resolving Presidential Election Disputes

The General Election Commission (KPU) is an election organizing institution that is national, permanent, and independent in organizing elections. Holding direct presidential elections is a democratic instrument to create a more democratic government and a step toward realizing people's sovereignty. In this research activity, the type of research used is normative juridical research (legal research), which prioritizes library research. However, along the way, various accompanying problems arose. Ultimately, these things must be considered challenges and part of the maturation process to create a more mature state government. As explained above, the various disputes in the final stages of voting for the elected candidate pairs in the Presidential Election show that we still have a lot of democratic agenda that needs to be resolved regarding regulations, institutions, and law enforcement. Thus, the disputes that occur should become part of the election maturation process as the period changes.

HEART RATE VARIABILITY IN THE ASSESSMENT OF ADAPTIVE CAPACITY IN NEWBORNS WITH PERINATAL INJURY OF CENTRAL NERVOUS SYSTEM

Relevance. The neurohumoral mechanisms regulating heart rhythm in newborns are a focal point of research in perinatal cardiology. This emphasis arises from the fact that heart rhythm serves as a key indicator of the functional interplay within the cardiovascular system and the overall physiological state of a newborn, acting as a primary marker of autonomic nervous system activity. Aim: To examine the characteristics of autonomic heart rhythm regulation in newborns with perinatal injuries of central nervous system through daily electrocardiogram monitoring. Subjects and methods. The study included 40 full-term newborns divided into two groups: Group I involved conditionally healthy newborns (n = 23), and Group II included newborns with hypoxic-ischemic lesions of the central nervous system (n = 17). Based on temporal and spectral analysis of heart rate variability, it was demonstrated that changes in the early neonatal period correlate with clinical signs of impaired postnatal adaptation. By the 3rd–4th day of life, all newborns exhibited a decrease in parasympathetic influence on heart rhythm and increased activity of the sympathetic division of the autonomic nervous system during the day. Hypoxic-ischemic injury of the central nervous system was associated with more pronounced autonomic dysfunction, leading to impaired regulation of the circulatory system. An imbalance between sympathetic and parasympathetic influences on the heart in newborns, who experienced asphyxia was identified as a significant arrhythmogenic factor. Heart rate variability emerges as a critical, informative marker for identifying at-risk newborns prone to developing heart rhythm disorders, facilitating timely inclusion in risk groups and ensuring appropriate follow-up care.

Between 1939 and 1941 An Evaluation on C.H.P. Conference Series and Social Darwinism Within the Framework of Efforts to Transform Society

This study attempts to analyze the “C.H.P. Conferences Series” organized by the leading academics of the period acrossthe country at a time when the codes of the Republic of Turkey were being rewritten from the perspective of Social Darwinism, one of the dominant paradigms of the period. The study focuses primarily on the intellectual currents that shaped the C.H.P. Conferences. Social Darwinism, which became a dominant paradigm in the West in the period between the two world wars, left its mark on the relevant period, although it was applied in different ways in various countries. In Hitler’s Germany, in particular, it became state policy and the whole of society was sought to be shaped by this idea. In Germany and other countries, science was used as a legitimizing basis. Eugenics, the most popular concept of Social Darwinism, sterilized people, banned interracial marriages and reduced and defined human biology. In Turkey, the newly established regime and its elites turned towards the West, saw it as a target and tried to build their society accordingly. This situation was idealized as “contemporary civilization”. In the three-year period between 1939 and 1941, a group of leading academics of the period launched a mobilization under the name “C.H.P. Conferences Series” in order to accustom society to their ideas and ideals. In these conferences, it can be seen that an attempt was made to explain all aspects of social life to the participants within the framework of the evolutionary paradigm, the scientific language of the time, and its main extension, Social Darwinism. In this study, after first presenting the various reflections of the relevant paradigm in the West, the works that were later published in twenty-four fascicles were subjected to a qualitative analysis within the concepts of social Darwinism and the relationship between them was tried to be revealed. In this way, the direction of social change in the Single Party Period is attempted to be understood.

Comparative Characteristics of Corneal Confocal Microscopy after UV-A Cross-linking with Different Riboflavin Solutions in Experiment

Corneal cross-linking (CXL) has become the most common way of managing keratectasia. To date, the Dresden protocol (G. Wollensak et al., 2003) has acquired many modifications, in which the composition of the applied agents or modes of CXL procedure have been changed. This article presents the results of studying morphological changes of rabbit cornea in vivo after CXL using riboflavin solutions of different composition.Purpose: compare the effect of CXL on the corneal morphological structure in experimental animals by confocal microscopy using riboflavin with saline, dextran and hydroxypropylmethylcellulose.Material and methods. The study was performed on 20 eyes of 15 rabbits, which underwent standard (Epi-Off) CXL with 0.1 % riboflavin in 3 groups: in the first group saline was used as a base, in the second group — 20 % dextran, in the third — 1.0 % hydroxypropyl methylcellulose (HPMC). Corneal irradiation mode: 3 mW/cm2, 30 minutes, wavelength 370 nm. The corneal condition was evaluated at 3, 7, 14, 30 and 90 days after CXL. Biomicroscopy and confocal microscopy were performed in all animals using Heidelberg Retinal Tomographer HRT-III (Heidelberg Engineering, Germany). Keratocyte density was counted at the depth of 120–160 μm in the central zone on the area of 1 mm2. Statistical processing of the results was performed using Statistica 6.1 and Excel 2010 programmes.Results. In vivo biomicroscopy and confocal microscopy of the rabbit corneas showed postoperative changes in the epithelium and stroma after CXL. In all groups, 7 days after CXL, there was a decrease in keratocyte density, due to apoptosis, observed predominantly in the anterior layers of the stroma. The number of keratocytes after CXL in group 1 was 192.5 ± 29.8 cells/mm2, in group 2 — 227.4 ± 38.2 cells/mm2, in group 3 — 204.4 ± 32.6 cells/mm2 against intact control 352.8 ± 35.2 cells/mm2. There was not statistically significant difference between the groups.Conclusion. The results of lifetime confocal microscopy of the rabbit cornea demonstrated similar morphological changes in the early postoperative period, which were accompanied by the loss of subepithelial nerve fibres, development of lacunar edema, apoptosis of keratocytes with a decrease in their density mainly in the anterior and middle layers of the stroma. The beginning of keratocyte repopulation and nerve fibre regeneration was observed on the 30th day after CXL. No signs of endothelium damage were detected. A comparative assessment of the greatest effectiveness of CXL techniques with 0.1% riboflavin in saline, dextran or HPMC can be given on the basis of larger-scale experimental and clinical studies.

Cancer Biology and the Perioperative Period: Opportunities for Disease Evolution and Challenges for Perioperative Care.

Efforts to deconvolve the complex interactions of cancer cells with other components of the tumor micro- and macro-environment have exposed a common tendency for cancers to subvert systems physiology and exploit endogenous programs involved in homeostatic control of metabolism, immunity, regeneration, and repair. Many such programs are engaged in the healing response to surgery which, together with other abrupt biochemical changes in the perioperative period, provide an opportunity for the macroevolution of residual disease. This review relates contemporary perspectives of cancer as a systemic disease with the overlapping biology of host responses to surgery and events within the perioperative period. With a particular focus on examples of cancer cell plasticity and changes within the host, we explore how perioperative inflammation and acute metabolic, neuroendocrine, and immune dyshomeostasis might contribute to cancer evolution within this contextually short, yet crucially influential timeframe, and highlight potential therapeutic opportunities within to further optimize surgical cancer care and its long-term oncological outcomes.

COMMERCIAL BANKS OF UKRAINE DURING THE WAR: NEW TRENDS AND OLD PROBLEMS

The article is devoted to the analysis of the peculiarities of the activities of commercial banks in Ukraine during the period of full-scale war. Its purpose is to identify new trends in banking activity and substantiate recommendations for restructuring the work of banks and its state regulation in the post-war period. During the study, a number of hypotheses were tested. It is proved that despite the significant number of commercial banks in Ukraine, the banking services market is actually oligopolistic. Taking into account the fact that state-owned banks, whose share in the total assets of commercial banks reaches 56%, actually pursue a coordinated policy and act as a single entity, the Herfindahl-Hirschman index for the banking sector of Ukraine is more than 3000, which corresponds to an oligopolistic market. This situation is justified for martial law, but it will require changes in the post-war period. The hypothesis that the main factor affecting the size of commercial banks’ assets is monetary aggregates was confirmed. The closest correlation was found between the size of assets and the monetary aggregate M2. This gives reason to recommend regulating this monetary aggregate as a tool for state regulation of banking assets. During the full-scale war, the tendency to change the structure of banking assets, which originated back in 2020, intensified. A sharp decrease in the share of loans granted was noted, while the share of debt securities, mainly government bonds, increased. On the one hand, this is evidence of the success of the implementation of government programs to attract funds from commercial banks for borrowing and covering the state budget deficit, and on the other hand, it distracts the banking system from fulfilling its main function - mobilizing temporarily free funds and providing loans. The high yield of government bonds, the NBU discount rate, which significantly exceeds the inflation rate, make loans inaccessible to business. And since other components of the market infrastructure (for example, joint investment institutions) are underdeveloped in Ukraine, business is actually deprived of the opportunity to attract funds for the implementation of investment projects. A study of the dynamics of bank performance indicators (ROA, ROE) for the period from 2008 to 2024 showed that after the banking crisis of 2015-2018, when the banking system as a whole operated at a loss, in the following years the situation not only stabilized, but also demonstrated that banks received excess profits. This is again a consequence of high interest rates on government securities and the concentration of profits in state-owned banks. Substantiated proposals for changes in state policy in the post-war period, which should revive the lending activities of commercial banks.

Comparative Seismic Evaluation of Building Codes: A Case Study on Structural Performance and Safety

The evolution of structural design standards, from empirical approaches to modern precision, has significantly impacted seismic evaluation and building safety. Indonesia’s adoption of seismic standards in 2002, aligned with global practices like ASCE, introduced notable shifts in seismic design philosophy. This study offers a novel comparison of the seismic performance of a forty-story office building in Jakarta designed under SNI 1726:2002 versus the updated SNI 1726:2019. The unique focus of this research lies in evaluating how the shift from a uniform risk philosophy to a uniform hazard philosophy, alongside changes in earthquake return periods, affects structural safety and performance criteria. A comprehensive seismic evaluation was conducted using both nonlinear static (pushover) and nonlinear time-history analyses (NLTHA), with performance criteria based on ASCE 41-17’s Life Safety and Collapse Prevention levels. By employing both methods, this study uniquely highlights discrepancies between traditional pushover analysis and the more rigorous NLTHA, a comparison rarely explored in the context of Indonesia’s seismic standards. The results revealed significant disparities between the two methods. While pushover analysis exposes potential beam failure under the Collapse Prevention criteria, the NLTHA results suggest a more resilient behavior, indicating that the structure may perform better under real seismic events. These findings emphasize the limitations of pushover analysis and underscore the importance of more detailed nonlinear time-history analyses in accurately assessing the seismic performance of buildings.

The Selection of Storage Period for Fresh Rice Noodles, Processing Materials, and the Screening of Key Indicators.

The storage period of paddy is a critical factor affecting rice quality, and it is still unclear how fresh rice noodles, primarily made from paddy, respond to changes in the storage period. To elucidate the relationship between the paddy storage period and the quality of fresh rice noodles, this study used fourteen rice varieties as materials and set up three paddy storage periods (six months, nine months, and twelve months). It explored the quality variation patterns of fresh rice noodles processed from these paddies and analyzed the relationship between the two in conjunction with rice quality. The results indicated that fresh rice noodles produced from paddies stored for nine months exhibited superior quality compared to the other two storage periods. Grey relational analysis and correlation analysis confirmed that this was primarily attributed to changes in the gel consistency of the paddy. When the paddy was stored for nine months and the rice gel consistency was approximately 32 mm, the quality of the fresh rice noodles produced was optimal, serving as an important basis for selecting raw materials for fresh rice noodles.

Urinary incontinence in postmenopausal women in the aspect of sexual health and therapeutic approach

Introduction Urinary incontinence (UI) is a prevalent condition among postmenopausal women, seriously impacting their sexual health and quality of life. In the postmenopausal period, multiple hormonal and structural changes occur in female body. These conditions can lead to psychosomatic disorders, causing shame, social withdrawal, and negatively affecting sexual health. Loss of bladder control creates discomfort during sex, reducing satisfaction for both women and their partners. Management strategies for UI in postmenopausal women include pelvic floor training, medications, and surgical options. Addressing the psychosocial aspects of urinary incontinence through counseling and education is essential for empowering women to seek support. Aim of the study The article discusses urinary incontinence in postmenopausal women, highlighting its impact on sexual health. It discusses the hormonal and physiological changes related to this condition and aims to present effective diagnostic and treatment strategies. Materials and methods We searched the following databases: PubMed, Web of Science, clinical trial registry platforms, and Google Scholar, using key terms such as "urinary incontinence," "postmenopausal women," "sexual health," "lower urinary tract symptoms (LUTS).” Conclusion UI is a serious problem affecting many postmenopausal women. It is crucial to elevate the understanding of both patients and medical staff about diagnosis, effective treatment options, and the importance of mental support. By taking this approach, we can create a healthcare environment that is more informed and compassionate.

KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation

We investigated the pulsating behavior of KIC 10855535 using Kepler 4 yr long-cadence data. Two independent frequencies were detected: a pulsation frequency F0 = 17.733260(5) day−1 and a low frequency f 8 = 0.412643(8) day−1. We identify F0 as the fundamental frequency, at which an equidistant quintuplet is centered, suggesting that the star orbits in a binary system. The fitted orbital parameters align well with those reported in previous literature. Long-term phase modulation caused by binarity has been confirmed by considering the light curve from the Transiting Exoplanet Survey Satellite. By removing the light-time effect, we measured a linear change in period of order Ṗ/P≃1.44×10−7yr−1 , a value that could be indicative of stellar evolution. The star also exhibits a gradual and stable amplitude growth, thereby raising the possibility of structural changes during its evolution. We attributed f 8 and its two harmonics to rotation and surface spots, with further analysis suggesting characteristics evolving over time. Based on this hypothesis, KIC 10855535 may rotate slowly for its type, with a speed of 37(2) km s−1. Overall, KIC 10855535 presents an exceptionally clean spectrum and a relatively slow rotation as a δ Sct pulsator, exhibiting a single pulsation mode that undergoes both amplitude and phase modulation.

Dynamic 3D Simulation of Surface Charging on Rotating Asteroids

The surface-charging phenomenon of asteroids, mainly resulting from solar wind plasma and solar radiation, has been extensively studied. However, the influence of the asteroid’s rotation on surface charging is not yet fully understood. In this study, a neural network is established to replace numerical integration, improving the efficiency of dynamic 3D simulations. We simulate rotating asteroids and their surrounding plasma environments under various conditions, including the quiet solar wind and solar storms. Different minerals on the asteroid surface are also considered. Additionally, the effects of orbital motion and obliquity are studied for asteroids with rotation periods comparable to their orbital periods. The results show that under the typical solar wind, the maximum and minimum potentials of asteroids gradually decrease with increasing rotation periods, especially when the solar wind is obliquely incident. For asteroids with rotation periods longer than one week, this decreasing trend becomes extremely slow. During a solar storm, the solar wind plasma changes sharply, and the susceptibility of an asteroid’s surface potential to rotation is greatly pronounced. Surface minerals also play a role; plagioclase is the most sensitive mineral among those explored, while ilmenite appears indifferent to changes in rotation periods. Understanding the surface charging of asteroids under various rotation periods and angles is crucial for further research on solar wind plasma and asteroids’ surface dust motion, providing a reference for the safe landing and exploration of asteroids.

Expanding the Ultracompacts: Gravitational-wave-driven Mass Transfer in the Shortest-period Binaries with Accretion Disks

We report the discovery of three ultracompact binary white dwarf systems hosting accretion disks, with orbital periods of 7.95, 8.68, and 13.15 minutes. This significantly augments the population of mass-transferring binaries at the shortest periods, and provides the first evidence that accretors in ultracompacts can be dense enough to host accretion disks even below 10 minutes (where previously only direct-impact accretors were known). In the two shortest-period systems, we measured changes in the orbital periods driven by the combined effect of gravitational-wave emission and mass transfer. We find Ṗ is negative in one case, and positive in the other. This is only the second system measured with a positive Ṗ , and it is the most compact binary known that has survived a period minimum. Using these systems as examples, we show how the measurement of Ṗ is a powerful tool in constraining the physical properties of binaries, e.g., the mass and mass–radius relation of the donor stars. We find that the chirp masses of ultracompact binaries at these periods seem to cluster around Mc∼0.3M⊙ , perhaps suggesting a common origin for these systems or a selection bias in electromagnetic discoveries. Our new systems are among the highest-amplitude known gravitational-wave sources in the millihertz regime, providing an exquisite opportunity for multimessenger study with future space-based observatories such as LISA and TianQin. We discuss how such systems provide fascinating laboratories to study the unique regime where the accretion process is mediated by gravitational waves.

Genetic predisposition to clinical AD and AD pathology is differentially associated with baseline and 3‐year period change for specific AD‐related markers

Genetic predisposition to clinical AD and AD pathology is differentially associated with baseline and 3‐year period change for specific AD‐related markers

Impact of random variations in the sampling period on the stability of embedded control systems

Abstract Control of embedded systems is a key task in many industrial and technological applications, and their performance and stability are critically dependent on the ability to effectively implement control algorithms within limited computational and time resources. One of the main challenges in this area is the need to process data with a random variable that comes to processing randomly and with variable periodicity. This variability in the sampling period can cause a decrease in the quality of the control, which threatens the stability of the entire system. The article examines the limits to which this variability can be tolerated without losing the stability of the controlled system. The study includes an analysis of systems dynamics with a variable sampling period and determining the necessary period of system discretization. It is also essential to consider the impact of the random component of the sampling period on the system’s transient response. The proposal is based on determining the permissible limits of the period change based on analysis and simulation. The result of this research provides recommendations for the design and implementation of control systems that can maintain high-quality regulation even with unpredictable changes in sampling periodicity. The present article also opens space for further research in the field of control of systems with variable periodicity, especially regarding their practical implementation in real embedded devices.