Account Changes Research Articles

Транспортная энергоэффективность и экономические принципы организации морского судоходства

Modern problems of ensuring energy efficiency and carbon intensity of marine vessels are considered, taking into account the achievement of profitability of flights. Since January 2023, such issues have been particularly acute for all maritime convention vessels engaged in international transport, taking into account the introduction of amendments to annex VI of the International Convention for the Prevention of Pollution from Ships (MARPOL), developed within the framework of the IMO short-term strategy until 2030 to reduce emissions greenhouse gases from ships. The composition of the world merchant fleet by ship types and deadweight was analyzed, the work of the tram freight market and the features of achieving optimal economic operational speed of the vessel were evaluated, taking into account operational and technical conventional restrictions on carbon intensity. The transport work of the universal vessel Singularity over the past three years has been analyzed, taking into account changes in operational speed and the level of freight rates. An adequate mathematical model has been proposed for assigning an optimal average operating speed to a ship according to a carbon intensity rating. The proposed methodological materials can be used by shipping companies in the commercial and technical operation of the fleet by assigning an operational speed in preparation for the voyage and when carrying out corrective energy efficiency measures to achieve an acceptable level of carbon intensity ratings for marine vessels.

Viewpoint Selection for 3D-Games with f-Divergences.

In this paper, we present a novel approach for the optimal camera selection in video games. The new approach explores the use of information theoretic metrics f-divergences, to measure the correlation between the objects as viewed in camera frustum and the ideal or target view. The f-divergences considered are the Kullback-Leibler divergence or relative entropy, the total variation and the χ2 divergence. Shannon entropy is also used for comparison purposes. The visibility is measured using the differential form factors from the camera to objects and is computed by casting rays with importance sampling Monte Carlo. Our method allows a very fast dynamic selection of the best viewpoints, which can take into account changes in the scene, in the ideal or target view, and in the objectives of the game. Our prototype is implemented in Unity engine, and our results show an efficient selection of the camera and an improved visual quality. The most discriminating results are obtained with the use of Kullback-Leibler divergence.

Robust-augmentation nonlinear dynamic inversion control of over-actuated coaxial high-speed helicopter in transition mode

As the elevator and rudder can be used actively for control, in addition to the rotors, Coaxial High-speed Helicopters (CHHs) have the problems of control redundancy and changing control authority in the transition mode. This paper presents a robust-augmentation transitioning flight control design for a CHH under the adverse conditions of parametric uncertainties and external disturbances. First, based on control characteristic analysis, an Adaptive Filtered Nonlinear Dynamic Inversion (AFNDI) controller is proposed for the angular rate to handle the effect of unknown unstructured uncertainties and external turbulence. Theoretical analysis proves that the presented angular rate controller can guarantee steady-state and transient performance. Furthermore, the attitude angle and velocity controllers are also added. Then, an Incremental-based Nonlinear Prioritizing Control Allocation (INPCA) method is designed to take into account control surface transition and changing control authority, which efficiently distributes the required moments between coaxial rotors and aero-surfaces, and avoids the control reversal problem of the yaw channel. In the proposed control architecture, the low-pass filter is introduced to alleviate the adverse influence of time delay and measurement noise. Finally, the effectiveness of the proposed controller is demonstrated through nonlinear numerical simulations, and is compared with existing methods. Simulation results show that the proposed control law can improve both capabilities of disturbance rejection and fast response, and works satisfactorily for the CHH transitioning control characteristic.

Evaluation of the influence of an aggressive environment on the durability of the cement stone

The paper proposes methods for assessing the durability of building materials and structures based on Portland cement when exposed to aggressive environments that mimic the products of the vital activity of bacteria on building materials. To determine the main parameters of the model of degradation of building materials under the action of aggressive environments, a mathematical model has been developed in the form of integral and differential relations connecting these parameters. A technique for identifying the mechanical characteristics included in these models based on the solution of inverse biodegradation problems has been developed. The analysis of changes in the structure of the cement stone was carried out using the results of computed tomography, and the regularities of the distribution of pores in the cement stone from the time of exposure were obtained. Based on experimental and numerical studies, it has been established that the mechanism of destruction of cement stone obtained by the traditional method and activation in the vortex layer apparatus is different. The difference lies in the greater accumulation of cement stone interaction products in the activated sample, which is confirmed by a shift in porosity to less than 0.5 mm and a lower solubility value compared to the control composition. The compressive strength of the samples as a result of exposure for 28 days decreased by 37% and 20% for the control and activated compositions. The mass of the studied samples as a result of exposure decreased by 49% and 21%, respectively. On the basis of this mechanism, a mathematical model of the process of material degradation in an aggressive one is developed, taking into account changes in porosity and acidity concentration, and dependence of material strength reduction are obtained.

ОПТИМІЗАЦІЯ ТЕМПЕРАТУРИ ПРИГОТУВАННЯ, ВМІСТУ ЕНЕРГОЗБЕРІГАЮЧОЇ ДОБАВКИ ТА АСФАЛЬТОБЕТОННОЇ КРИХТИ ПІД ЧАС ВИГОТОВЛЕННЯ ТЕПЛИХ АСФАЛЬТОБЕТОННИХ СУМІШЕЙ

Introduction. The article investigates the effect of the preparation temperature, the amount of energy-saving additive and the amount of asphalt crumb on the physical and mechanical properties of warm asphalt mixtures. The method of experimental and statistical modeling was used in the study, and mathematical models describing the dependence of water saturation and compressive strength of asphalt concrete were developed. Based on the analysis of the results obtained, the areas of optimal values of the preparation temperature, the amount of energy-saving additive, and the amount of asphalt crumb during the production of warm asphalt mixtures were determined. In this case, the resulting mixture meets the standard requirements for hot fine-grained asphalt mixtures in terms of physical and mechanical properties. Problem statement. Studies by the authors of [1] have shown that when preparing an asphalt mixture, it is very important to take into account changes in the properties of bitumen, which is the main component that characterizes the behavior of asphalt concrete. In the preparation of warm asphalt mixtures, it is advisable to use energy-saving additives, the introduction of which provides relatively new chemical effects that improve the workability, mobility and energy saving of mixtures made at lower temperatures than traditional hot mixtures. At the same time, due to the large number of different types of additives, there is no accurate quantitative data on the dependence of asphalt concrete properties on the content of additives at different amounts of bitumen for different types of asphalt mixtures.

State regulation instruments for the development of the agro-industrial complex under martial law in Ukraine

Amidst the crisis in the food sector of the country caused by the Russian invasion and on the way to Ukraine's association with the European Union, the role of state regulation is growing. The study aimed to provide proposals for improving the food industry development programmes in the agro-industrial complex to improve the food supply of the population, innovative development of enterprises and ensure food security in Ukraine. General scientific methods were used in the study: dialectical, statistical, structural and functional analysis, tabular, systematic generalisation, and comparisons. The study summarises the existing programmes of support and development of the agricultural sector of Ukraine at the governmental and interstate levels. The problems of food and agricultural enterprises in the context of Russian aggression in Ukraine are identified, in particular, in terms of environmental damage and pollution, instability of energy supply, and rising logistics costs. The author notes the effectiveness but selectivity of grant support with the participation of foreign capital. The programme documents for the development of the agro-industrial complex and the food industry are systematised and their interconnection is analysed. These documents include the National Economic Strategy and the strategy for the development of its agricultural component, sectoral support programmes, sectoral strategies, and international and national programmes. The article presents proposals for the programme documents for the development of the food industry aimed at post-war recovery and further innovative development. The proposals take into account foreign experience, industry specifics and changes to the current legislation. Sectoral development programmes should be in line with the strategic guidelines until 2030 and the provisions of the Association Agreement with the European Union, contribute to solving environmental pollution and climate change, waste recycling and creating closed production cycles with high added value. The results obtained can be used in further research, programmes, recommendations and strategies of legislative and executive authorities for the effective development of the food industry as part of the agri-food complex and the improvement of food supply to the population.

Modeling and FE simulation of coupled water diffusion and viscoelasticity in relaxation tests of polyamide 6

Polyamides can absorb or desorb water from or to their surrounding environment. The impact of this process is significant as water molecules lead locally to a swelling and a coupling of diffusion and deformation behavior. To model these phenomena, a strongly coupled chemo-mechanical (or diffuso-mechanical) model is required, considering both local water concentration and the viscoelastic material behavior of polyamide. In the present work, we derive and apply such a model to polyamide 6. A diffusion equation describing changes in water concentration is coupled to the balance of linear momentum in polyamide 6. The interaction between deformation and concentration is derived from thermodynamic considerations by introducing a free energy consisting of a mechanical and a chemical part. The mechanical part describes a linear viscoelastic model and includes chemical strains due to the presence of water molecules. The chemical part builds upon the theory of Flory and Huggins, that takes into account changes in enthalpy and entropy of mixing due to the interaction of polymer and water molecules. The coupling of deformation to water concentration arises due to a dependency of the water flux on the hydrostatic stress inside the polyamide. We successfully apply the derived model in Finite-Element simulations to predict the drying of polyamide 6 specimens without any coupling to mechanical loads. In addition, we reproduce experimentally obtained data from relaxation measurements, where the drying of polyamide specimens leads to an increase in relaxation modulus.

Features of heat/mass transfer and explosive water boiling at the laser fiber tip

Experimentally, as well as using numerical simulation methods, the features of the processes of heat and mass transfer and explosive boiling of water, initiated by continuous laser radiation with λ = 1.94 μm, emerging from the tip of the laser fiber, are studied. The trajectories of the microvolume with the maximum temperature of the superheated liquid under laser heating, in which the probability of explosive boiling up is maximum, are determined. The calculations took into account changes in the density of superheated water and the dependence of the absorption coefficient of laser radiation on temperature. Using acoustic methods and high-speed video recording, it is shown that during explosive boiling up, the duration of the leading front of the acoustic signal is ∼300 ns. Such a long duration of pressure rise at the receiving point is explained by the fact that explosive boiling occurs in a wide area of superheated liquid near fiber tip, when the nuclei located in it are stimulated by an initially arising pressure pulse.

IMPLEMENTATION ON AIR-WRITING RECOGNITION SYSTEM

Air writing is a new and innovative technology that allows users to interact with digital devices and manipulate the air by writing or drawing, eliminating the need for all physical contact. This article provides a comprehensive study of the current state of research and development in the field of climate documentation. In this cutting-edge concept, we delve into its history, the motivations that drove its development, and the fundamentals of the technology. We also explore the main tools and equipment required to use the aerial recorder and discuss various applications, such as virtual reality, to improve access for people with disabilities. However, despite its potential, the adoption of writing is not without its challenges and limitations, which we examine in detail. This survey provides a comprehensive review of the latest techniques, algorithms and machine learning techniques used in weather forecasting and provides insight into the methods used to measure performance. We also consider the key elements of user experience and interaction design that are important to the success of these systems. As we look to the future, we identify possible research and development paths that take into account new technologies and changes that will change the country. Overall, this research demonstrates the importance of cloud typing in the field of human-computer interaction and its potential to usher in a new era of contactless, gesture-based interfaces that revolutionize the way we interact with digital technology. " Key Words: Air-Writing, gesture-recognition, CNN, image preprocessingoptics, photonics, light, lasers, templates, journals

CFD simulation of heat and mass transfer processes in a metal hydride hydrogen storage system, taking into account changes in the bed structure

CFD modelling of heat-and-mass transfer in metal hydride (MH) beds is an important step in the development and optimisation of MH reactors for hydrogen storage, compression and separation/purification. In the existing models, the mass conservation equation includes the density of solid in the non-hydrogenated (ρs) and hydrogen-saturated (ρss) states. To provide constant porosity of the MH bed during H2 absorption/desorption, assumption ρs<ρss is typically taken. However, this assumption contradicts to well-known fact that hydrogenation of hydride-forming alloys is accompanied by the expansion of crystal lattice of the metallic matrix and, therefore, by the decrease of the solid density by 15–25%.This work presents results of the modelling which takes this effect into account. The model assumes that the density of the MH changes linearly as the starting hydride-forming alloy is saturated with hydrogen, while the volume of the MH bed remains constant. The last assumption is a limiting estimation because it provides the maximum possible reduction in the porosity during H2 absorption process.The model was validated using published experimental data on a cylindrical MH reactor filled with 422 g of LaNi5. It was shown that accounting the realistic changes in the MH density can significantly affect the simulation results.

ПІДВИЩЕННЯ ЕФЕКТИВНОСТІ СИСТЕМ ОСВІТЛЕННЯ ЖИТЛОВИХ БУДИНКІВ І ОБ’ЄКТІВ СОЦІАЛЬНО-КУЛЬТУРНОГО ПРИЗНАЧЕННЯ

The results of a study of the energy efficiency of lighting installations of residential buildings and buildings of social and cultural purpose are given, and based on a technical and economic comparison of four options of lighting systems: with incandescent lamps, fluorescent lamps, compact fluorescent lamps and LED lamps, a quantitative assessment of lighting costs is given. A mathematical model of specific discounted costs was developed, which made it possible to take into account changes in lighting operating conditions over time, and the presentation of research results in relative units gave them a generalized appearance. Conclusions were drawn and recommendations for their application were given. Ref. 9, fig. 2.

Różnice w pomiarze płodności kobiet zależnie od szacunku liczby ludności

The primary objective of the article was to present the differences in women’s fertility measurements in Poland depending on the method of estimating the population number. An additional aim was to determine the variability of fertility rates by age and geographical region as a consequence of the adopted definitions of population. The study used data from Statistics Poland, Eurostat and the Human Fertility Database for 2021, taking into account changes in women’s fertility starting from the 1945 generation. Demographic, period and cohort analysis methods were employed in the study. The longitudinal approach was used to additionally identify changes in fertility patterns across generations of women. In accordance with the principle of constructing demographic coefficients, the number of events was related to the population that could actually experience them, i.e. the resident population. All partial fertility rates were recalculated based on the estimated resident population according to the Population and Housing Census 2021. The results of the analysis indicate that total fertility rate (TFR) of women in Poland in 2021 calculated for the population according to the national definition was lower by 4.3% than the rate calculated for the resident population. The most significant underestimation was observed for the 35–39 age group (by 6.3%), and in terms of geographical regions, for Podkarpacie (by 11.0%). The discrepancies are larger for age groups and regions with greater mobility, showing the need to take into account the resident population when measuring the intensity of demographic processes.

Determination of equivalent stresses of pipes made of 12Kh1МF steel using FEM method, taking into account changes in geometry and scaling during operation

Determination of equivalent stresses of pipes made of 12Kh1МF steel using FEM method, taking into account changes in geometry and scaling during operation

Regional food self-sufficiency potential in the European Alpine space

The sustainability of the food system needs to be improved, including shortening supply chains and promoting the consumption of regional food. Here, we explore the current potential for regional food self-sufficiency in the European Alpine space by calculating the current regional food/feed energy balance, deriving the regional per capita land footprint based on current food/feed consumption rates, and modelling the current potential for regional food/feed self-sufficiency. We show that 59% of the 560 Pcal of energy currently available in the study area comes from domestic production, and almost 60% of the energy is used for livestock consumption, with high regional variability. The resulting land footprints range from 2301 to 2975 m2 cap−1 y−1. Taking into account changes in cropping patterns, partial intensification, but no expansion of agricultural land, the European Alpine space could produce 89% of its current food demand domestically, with high regional variability due to population density, availability of agricultural land, crop yields, climatic conditions and dietary habits. These findings highlight the potential and limitations of regional mountain food systems and call for new strategies to improve sustainability. Reducing the current high consumption of animal products would reduce the land footprint and increase the potential for food self-sufficiency.

Advantages and disadvantages of using the Internet of Things in accounting

Since the beginning of the existence of the Internet, devices have been connected to it, and in the modern world everything has become more perfect and convenient. Also, the devices themselves have become more compact and accessible to ordinary people, so the Internet of Things or connected devices can be considered the driving force of Industry 4.0, which is also called digital, that is, artificial intelligence can perform certain operations without human assistance. New opportunities are opening up for companies and enterprises, they can significantly save their costs, both time and money, which will help to effectively perform work for the modern business sphere. An employee of the accounting service must be ready for new challenges, because the accounting documentation system is changing. Therefore, every modern accountant must be flexible to digital changes, acquire new knowledge, abilities and skills that are needed in the modern world. But not all new changes are immediately ideal, so there are a number of advantages and disadvantages of the Internet of Things in accounting. The advantage of the Internet of Things in accounting can be considered automation. Devices connected to the Internet collect the necessary data for the employee of the accounting service and, as a result, automatically enter financial data into the accounting system, this advantage allows for quick processing of information, and also reduces the risk of human errors in entering accounting data. But there are also disadvantages of using the Internet of Things in accounting. The main drawback is security and data protection. Ultimately, devices that are not sufficiently secured can be vulnerable to cyber attacks, which can lead to the leakage of financial and other important data stored by businesses. In order to succeed in the implementation of digital changes in accounting, it is necessary to analyze in detail the advantages and disadvantages of new technologies.

Legal Framework of Land Engineering: Compliance with Environmental Regulations to Reduce Pollution

Research in relation to land technology should be conducted guided by concerns for environmental sustainability. There must be a robust framework that regulates land use and development, taking into account changes in the environment due to biological, human-made substances and other factors. The research has shown how important it is to have all stakeholders involved in regulation process through Integrated Stakeholder Engagement Approach (ISEA) which is unique. Proposed ISEA approach can bring together different stakeholders including government agencies, corporate experts, environmental advocates as well as community groups to come up with appropriate regulatory frameworks. One model of reducing the impacts of a building is to build it on a strong foundation. It is necessary today for such studies to include simulation assessment so as to evaluate the effectiveness of the regulatory system. This review examines possible outcomes and environmental implications associated with specific regulations based on certain zoning policies are useful for decision-making and policy choices. By minimizing pollution while using simulation analysis techniques among different stakeholders, this initiative wants to facilitate resilient sustainable land improvement.

What Happens when Gender Accountability is Reduced? The Experiences of Nonbinary and Genderfluid People During the COVID-19 Pandemic

How does gender accountability vary? We theorize that reduced perceptions by others of one’s gender, or reduced external assessments of gender accountability, create more space for the cultivation of nonbinary subjectivities. We use the shelter-in-place period of the COVID-19 pandemic as a natural experiment during which major social institutions such as work and school changed and thus shifted gender accountability. Through interviews with a racially diverse sample of 22 U.S. adults who came out as nonbinary or genderfluid during this time period, we examine their experiences and understandings of this change in gender accountability. Participants described relief from relentless gender assessments as well as space for self-reflection and gender experimentation. Less stringent external assessments at work and school, especially the reduction of constant in-person evaluations of gender expression, produced new gender subjectivities that resisted binary understandings of gender. This study explores the nuance, variability, and situational character of gender accountability. We argue that in-person full-body gender assessments are a powerful component of gender accountability and that relief from gender accountability at work and school may be particularly liberating.

Nonlinearities correlation of n-alkanes and n-alcohols physicochemical properties

Correspondences between the changes nonlinearity in substance physico-chemical parameters and the influence mechanisms on them by the substance supramolecular structure in the calculated dependencies form for n-alkanes and n-alcohols was established. Similarity, change features and correlation between such parameters as melting point, boiling point, flash point, self-ignition, density, solubility in water, viscosity, vaporization heat, surface tension were investigated. The paper obtained 14 calculated dependencies that calculate these parameters on the established similarity basis between them and the lengths of the molecule or cluster with sufficient correlation coefficients. For viscosity, vaporization heat and surface tension, change general dependences are established, but without taking into account oscillatory deviations. Calculated dependences between substance characteristic temperatures were obtained: melting temperatures of alkanes and alcohols, boiling and flash temperatures in homologous series, autoignition and melting temperatures (flash, boiling). This correlation is explained by the fact that supramolecular structures are formed according to a similar principle in matter different states and during the combustion initiation. Such structures modeling for the solid, liquid state, and solubility in water was carried out, taking into account different coordination numbers, globulation, and changes in the clustering place according to the molecule length. On the such modeling basis and the "melting ease" indicator, dependencies have been developed for calculation with the dependencies nonlinearities reflection of alkanes and alcohols density and melting temperature. For the boiling and flash point, vaporization heat of alcohols, the deviation from linearity is taken into account by the cluster length reduction parameter. It is shown that the considered dependencies modulation by the cluster length allows to describe their anomalies and increases the calculation convergence.

Профилактика рискованного поведения старшеклассников в условиях нравственного закаливания

The features of the prevention of risky behavior of high school students in the conditions of moral hardening are considered, the conditions determining this process and the content of pedagogical activity are highlighted. The considered model of the organization of work reflects the focus on the prevention of antisocial manifestations in the youth environment, the reduction of social risks accompanying the socialization of the younger generation. The algorithmic nature of the organized activity is built taking into account changes in the level of necessary personal competencies, the social experience gained.

Potential of the domestic biosimile omalizumab in achievement of control in patients with severe asthma: short communication

BACKGROUND: Severe atopic asthma is a medical and social problem due to its prevalence, the tendency to exacerbations, the impact on the quality of life and on the work ability, and high treatment costs. The appearance biosimilar omalizumab among biologicals makes such therapy more accessible to patients. This article presents the results of an open prospective clinical study of the biosimilar omalizumab in patients with the severe atopic asthma.&#x0D; AIM: To evaluate the efficacy and tolerability of the domestically produced biosimilar omalizumab in the real clinical practice.&#x0D; MATERIALS AND METHODS: The study involved 15 adult patients (19–66 years) with a reliable history consistent with moderate to severe atopic asthma who hadn`t have asthma control at the time of inclusion in the study. All patients received the Genolar (omalizumab, Generic JSC, Russia) for 52 weeks at the dose calculated according to the instructions. The efficacy was evaluated taking into account changes in symptom severity, improved asthma control using the Asthma Control Questionnaire (ACQ-5), pulmonary function tests, peak flow measurements, assessment the asthma exacerbations number and the healthcare resources use.&#x0D; RESULTS: According to our study results, all patients demonstrated a decrease in the night and daytime attacks frequency and the shortness of breath severity due to omalizumab, which made it possible to reduce the basic therapy and refuse systemic glucocorticosteroids using in patients who previously received there. After 6 months we obtained an improvement in the asthma symptoms control: ΔACQ-5=-1.87 (p=0.0002) compared to baseline with a trend towards further improvement in indicators and reached ΔACQ-5=-2.18 (p=0.0001) to the 52nd week. We also obtained a statistically significant improvement in pulmonary function (after a year of treatment, the increase in forced expiratory volume in the first second was +19.85% compared to baseline, p=0.0001). No asthma exacerbation was registered during 12 months omalizumab treatment.&#x0D; CONCLUSION: Our study showed that the biosimilar treatment in patients with severe atopic asthma allowed to achieve asthma control, decrease the exacerbations number and reduce the basic therapy volume, including oral-corticosteroid elimination.