bluuebunny/crossref_metadata_2025 huggingface dataset:
Hydrodynamic studies of well No 32 the southern section of the Chinarev field of the West Kazakhstan Region
Authors: Satayeva Sapura , Urazova Aliya , Kiisheva Dinara , Mendygaliyeva Aigul
Published: January 2024

The article analyzes the factors influencing the development of high-quality and cost-effective oil and gas reserves in the region (assessment, design). In order to operate wells, directions for calculating the size of reserves have been found. Scientific and technical trends of its (wells) development are considered. A comprehensive analysis of integrated surveys was carried out at well No.32 of the Chinarevsk oil and gas condensate field, located in the southern section of the district. Hydrodynamic studies were carried out by interpreting the pressure recovery curve (PRC) to determine reservoir pressure, porosity and reservoir properties of the reservoir and the state of the bottom whole zone. These studies confirmed the low porosity properties of the reservoir: permeability - 0.004 μm2, conductivity - 0.056 μm2*m, hydraulic conductivity - 0.055 μm2*m/mPa*s. The skin factor varied in the range from -0.92 to 18.4, which indicates deterioration in the state of the bottom hole formation zone.
Green industry: how to make production eco-friendly
Authors: Antonova N. , Shirinkina E. , Popova E. , Strih N.
Published: January 2024

The relevance of the study is determined by the fact that green industry is a new area of the economy aimed at preserving the well-being of society through the efficient use of Earth resources. The development of humankind is impossible without the impact on the environment and the use of natural resources: factories are built, waste is incinerated, minerals are mined, forests are cut, and smoking factories are launched. Almost all human actions affect the ecosystem of the Earth; hence, the article discusses whether it is possible to make this impact less harmful. Studies are given on the harm caused by large-scale production to the environment and how to reduce it; how the environmental policy of cities is changing and enterprises are transformed; what is a ‘green industry’ and how to organize production according to its principles. The empirical basis of the study is the research report of the World Health Organization; American scientists and experts of the Swiss company IQAir, the data of the rating of the US Blacksmith Institute (Pure Earth NGO) for the study of the toxic cities, as well as Eric Hobsbawm’s scientific works. The practical significance of the research is aimed at the rational use and organization of work with natural resources, their economical consumption, the use of environmentally friendly technologies in production and in life, and the creation of sustainable conditions for investment in such projects not only by the government authorities, but also by the private sector.
Analysis of the significant factors influence on the fiber mass’s clearing and blending
Authors: Yeshzhanov Abilda , Batyrkulova Akbota , Murzabayeva Gulzhan
Published: January 2024

The effectiveness of the spinning production’s clearing and blending process was studied in the work. The lock mass Y1, the impurities mass Y2 and the lock density Y3 were selected as clearing and blending process’ efficiency factor. The coefficient Cp influence on the values of Y1, Y2, Y3 was studied more detail. In a similar way, the effect of the foreign impurities’ maximum content gMax on the locks’ average indicators Y1, Y2, Y3 was studied. It has been established that the locks’ mass most depends on the locks’ kinetic energy. The higher the locks’ speed and mass, the more it is subject to impurities’ blending and extracting. The locks’ size and number should optimally correlate with the working area’s size. When we fill the working area with fiber mass, the clearing and blending degree decreases. On the contrary, with a fiber mass’s rarefied flow, the clearing and blending efficiency becomes greater, but the equipment productivity decreases. The smaller the locks’ mass, the lower their interaction likelihood with the working parts, the cleaning degree is lower.
Confirmation of the operational reliability of building structures at the place of their installation in the building
Authors: Brovko Igor , Dosaliyev Kanat , Artykbaev Darkhan , Duisenbekov Bolat , Nurseitov Shokhan
Published: January 2024

The article presents the results of full-scale static tests of two reinforced concrete columns arranged in different parts of a public building, the reliability of which was doubted due to the careless manufacture of concrete cubes before sending them for laboratory tests. Based on the doubts that arose, the construction of the object under construction was suspended with the requirement of convincing proof of the operational reliability of these load-bearing structures.
Compressor desalination plant based on a heat pump
Authors: Solomin Evgeny , Zimina Yuliya , Konchakov Vladimir
Published: January 2024

When grain is stored, it needs to be thoroughly dried to prevent mold and insect infestations. Grain that is stored without drying can develop mold due to moisture, which can then lead to the development of mycotoxins. The drying process begins with pre-conditioning, which works to equalize the moisture content throughout the grain. This is typically done by aerating the grain with hot air, which is then circulated to ensure even drying. In summary, steam overheating is an important part of the grain drying process. It works by compressing a refrigerant gas, which increases its temperature and pressure, allowing it to absorb heat energy from the outside air. Not only does it help to reduce costs and improve the safety of the process, but it also helps to ensure that the grain is dried to precise moisture content, resulting in a more consistent and uniform product.You should leave 8 mm of space above the abstract and 10 mm after the abstract.
Heat pump and orc as part of an energy technology complex of water desalination
Authors: Prikhodko Yuri , Olinichenko Alyona , Bolkov Yaroslav
Published: January 2024

The article considers the processes of modeling the flow of a refrigerant and presents the results of numerical simulation of freon evaporation in a tubular evaporator. The results show the effect of convective heat transfer and bubble formation on the heat transfer coefficient. It is assumed that this technology can be used, among other things, as an element for water desalination. The possibility of using heat pumps and the organic Rankine cycle in the scheme of water desalination is considered. The authors propose to design such energy-technological complexes, starting from the stage of numerical simulation. The modeling results and the developed schemes presented to the attention of readers are part of a unified methodology for heat pumps and desalination systems.
Allocation of non-uniform complex of resources in production systems. Scheduling and correction of deadlines
Authors: Kononov Dmitry , Furugyan Meran
Published: January 2024

The problem of planning a job complex with the use of resources of various types − renewable (performers who can differ with the productivity) and several types of non-renewable is considered. We allow interruptions, and switching from one performer to another and performing one work simultaneously by several performers. The available number of performers at different times is not constant, and their productivity may vary. A developed polynomial algorithm finds the optimal allocation of resources and builds the optimal schedule of jobs. A pseudopolynomial algorithm for finding the optimal allocation of resources of minimal cost has been developed. These algorithms based on building a flow network model and modifying the packing procedure. An algorithm for the optimal allocation of resources and the construction of an optimal schedule for the case of a heterogeneous set of works is proposed.
The use of technogenic raw materials in high-alumina chamotte production
Authors: Pavlova I.A. , Getman A.A. , Farafontova E.P.
Published: January 2024

The aim of this project is to develop the mass composition and the technology for producing high-alumina chamotte with an Al2O3 content of 65–85% based on technogenic raw materials – fine corundum dust formed during grinding of fused corundum. Finely dispersed corundum powder contains 93–95% Al2O3 is a by-product and can be used to obtain high-alumina chamotte. The parameters of high-alumina chamotte molding were determined. For the composition of the masses with Al2O3 content of 65% the molding moisture is 5–7%, with a pressing pressure of 15–20 MPa; with Al2O3 content 75% – moisture is 5–7%, pressing pressure is 10 MPa; with Al2O3 content 85% – moisture is 9%, pressing pressure is 15–20 MPa. Water absorption of chamotte after firing at 1700°C is 12–15%. The phase composition of chamotte with Al2O3 content: 65% – corundum (35–38%), mullite (46–50%), thialite (up to 4%), cristobalite (6–8%); 75% – corundum (43–50%) mullite (45–47%), thialite (up to 4%); 85% – corundum (68–71%), mullite (24–27%).
Risk assessment of storage tanks in the oil and gas industry
Authors: Al-Rawhani Noraddin Mohammed Ahmed , Alekhin Vladimir , Poluyan Lyudmila
Published: January 2024

Accidents at oil and gas facilities are among the main causes of environmental pollution and loss of life. In the interests of solving the problem of ensuring the safety of oil and gas facilities, a review of the state of oil and gas facilities in the republic of Yemen was carried out, statistical data on accidents were analyzed, Defined the events that cause a fire in hazardous situations and build scenarios for the occurrence and development of fires through the study of an accident in the Aden refinery, also assessment of the mass of flammable substances entering the surrounding space as a result of fire hazardous situations, construction of fields of hazardous factors of fire for various scenarios of its development, assessment of the consequences of exposure to hazardous fire factors on people, and a base was developed for risk assessment and management.
Correction coefficients of neural network algorithms for assessing the development of residential neighborhoods
Authors: Salnikov Viktor , Pridvizhkin Stanislav , Tokhtuev Atrem
Published: January 2024

The paper presents the correction coefficients of neural network algorithms for assessing the development of residential neighborhoods: the corresponding model of correction coefficients is shown, its features are discussed, the relevance and prospects for the use of correction coefficients in the planning of new neighborhoods are substantiated.
Organizational schemes for the state expertise process of design documentation depending on the level of implementation of information modeling technologies
Authors: Serbin S.A. , Seregina N.Yu. , Fomin N.A.
Published: January 2024

The implementation of building information modeling (BIM) technologies is actively developing in Russia due to legislative influence. The authors of the article examined the process of the design documentation's examination depending on the level of building information modeling technologies' implementation. A gradation of BIM implementation levels in the examination process was applied: low, medium, high, on the basis of which three schemes of the organizational examination process were described. For each scheme, positive and negative aspects were analyzed. Questions that may arise when trying to implement each organizational scheme were formulated. For the practical implementation of each scheme by all participants in the process the necessary measures were described. The conclusions about the further vector of development in the realities of current legislation and the development of building information modeling technologies were drawn.
The features of mathematical and computer modeling of the flow of three-phase media in open channels
Authors: Nysanov Ernazar , Kemelbekova Zhanar , Makhatova Anar , Kozhabekova Aiman , Kozhabayev Sabyr
Published: January 2024

The problem of determining the phase velocities is solved on the basis of mathematical and computer modeling, taking into account changes in the depth and width of the channel in a steady flow of viscous three-phase media. The dependences of the mixture velocity on various characteristics of the three-phase media are established. The flow of water with solid particles is considered as a three-phase media. The inhomogeneity of particles in size in a moving mixture (water + small particles + larger particles) is taken into account.
Analysis of the application of automated systems in mechanical engineering
Authors: Burdo G.B.
Published: January 2024

Introducing off-the-shelf solutions for automated machine-building systems causes some difficulties related to attempts to change the algorithms of process participants, and also to the need to duplicate information transfer chains, as most systems operate autonomously within certain production units. The author proposes a new approach to organizing the interaction of automated systems of machine-building enterprises. Effective implementation of automated systems is possible only based on investigation and optimization of machine-building enterprise activities, and based on analysis and quality assessment of functions performance by participants of different enterprise processes. The method comprises identifying the process for preparing production and output of finished products, and processes of lower levels (auxiliary), but necessary for implementing the main, and functionally related to it. The main functional process defines a time parameter and auxiliary processes accompanying the main process. These auxiliary processes are financial, material, personnel, and organizational support processes. The article contains the basic principles of creating a complex of automated machine-building systems. The article analyzes the role and place of each of the main functional automated systems. The author gives considerations on the sequence of implementation of the project of digitalization of machine-building production.
A model for ensuring the safety of hydraulic structures based on computer technology
Authors: Paluanov Daniyar
Published: January 2024

The article discusses the issues of prompt decision-making and elimination of problems in ensuring the safety of hydraulic structures during operation using computer technologies that meet the requirements of the time. Particular attention is paid to qualified personnel in ensuring the safety of hydraulic structures, achievements in the use of computer technology. The main criteria for the causes of accidents and malfunctions made by unskilled operators during operation are given.
Development of the information-analytical system for monitoring external communications of the enterprise in C#
Authors: Butsenko Elena , Basharina Olga
Published: January 2024

Information security and data protection are currently important elements of the activity of any enterprise. The changes taking place in the global economy stimulate the emergence of new software products that reduce the risk of confidential data leakage. The article proposes a solution to the problem of monitoring and evaluating the communications of enterprise employees with customers, customers and partners. As a result of the study, a software system for monitoring and evaluating two types of messages was developed: voice and text. The main method in the development of this monitoring system is a technical and forensic analysis. With its help, a software implementation of the system was created in the C# programming language. The program consists of two main functional parts: the first part is designed to process audio files, the second is responsible for the analysis of text messages. Also, a detailed description of the main procedures of the program operation is given, taking into account differences in the methods of storing and processing data, which is justified by different formats of the analysed files. Using the developed program can help the enterprise build a communication strategy to reduce further possible costs and identify as much data as possible about intruders. In the future, this system can be improved, and supplemented with functionality and a more user-friendly interface.
Using the power query system for processing and data mining SAP ERP
Authors: Tkachenko Alexey , Chernyshov Mikhail
Published: January 2024

The article discusses the use of an intelligent Power Query system for processing data from SAP ERP. When used with SAP ERP data, Power Query can greatly simplify the data analysis process, as well as improve the accuracy and reliability of results. The article provides an overview of the main features of Power Query and how they can be used for data processing in conjunction with the SAP ERP system. It highlights the benefits of using Power Query, including speeding up data processing time, improving data accuracy, and the ability to easily exchange and reuse data processing procedures. Using Power Query to process and analyze bank statements via SAP ERP provides many advantages. Power Query's powerful data processing and transformation capabilities enable organizations to analyze their financial data quickly and accurately, making it easier to identify trends, improve decision-making and stimulate business growth. In addition, the integration of Power Query with SAP ERP provides organizations with a centralized representation of financial data in real time, which allows them to make informed decisions and optimize their activities. Using Power Query to analyze bank statements can also help organizations reduce manual data processing and minimize the risk of errors, increasing the accuracy and reliability of financial information. In general, Power Query offers a powerful solution for organizations seeking to optimize financial analysis processes and ensure business success.
Graph-analytical determination of heat consumption by a ventilation system in a sewage pumping station
Authors: Prokhorov V. , Razakov M.
Published: January 2024

In this paper, it has been described a methodology for constructing a chart of designed heat consumption by a ventilation system in a city's sewage pump station (SPS) through using a standard air exchange rate. This calculation method can be used in all climatic regions in the Russian Federation and in any other country. It has been reviewed only industrial part's inflow ventilation system (in the SPS) because of the fact that the administrative part uses its own individual system with its air quality requirements. In this article, there is some fundamental characteristics of the outdoor air, as well as the physical characteristics of the inflow air for the city sewage pumping station. The work will be useful for designers (to reduce the time for designing this type of rooms), as well as for the maintenance service of engineering ventilation systems of these constructions. In the future, the methodology can be expanded to all rooms of the SPS.
Managing movements, ordering and transformations of resource flow processes in course of implementing development project life cycles
Authors: Platonov Anatolii , Larionova Viola , Davy Yury
Published: January 2024

Based on previous research of theory and methodology, authors describe and systematize the triune process of motion, ordering and qualitive and quantitative transformations ща the development process resource flows from the externally chaotic resource surrounding at macro-, meso, and micro-resource levels, to the organized project organizational and technological stages. Characteristics of different flows located at different resource levels and project stages of project life cycles from initiation through implementation, modernization and demolition of the assets were provided according to the “order of multipole various resource flow processes from their chaos” paradigm. Authors determined sources and ends of the unordered and ordered resource flow processes in course of project life cycles, defined conditions for process ordering and transformations at each resource level and project life cycle stage, and outlined goals, interests, tasks and areas of responsibility for development project stakeholders at different project life cycle stages. Authors perform analysis and forecasting of resource flow management processes for different project life cycle processes and resource levels based on the logistic relay model, and according to the proposed methodology of managing resource flow “triad” of flow motion, ordering, and transformations is a common spatial and temporal field of resource logistics.
Service to stimulate the student’s inventive activity at the university
Authors: Fomin N.I. , Letavin D.A. , Mironova L.I.
Published: January 2024

The relevance of the topic of the article is due to the need to intensify innovation at domestic industrial enterprises to ensure accelerated technological sovereignty. The article presents the justification for the need to develop a university service to automate the process of generating a patent application, as an important component of inventive activity. The analysis of existing foreign software products for the formation and verification of applications showed that they cannot be used in domestic universities to obtain Russian patents. A step-by-step algorithm for the process of filing an application for a patent is formulated and an assessment is made of the possibilities of its automation using the service. For the possibility of developing a service to automate the process of generating applications, a description of its main functions is given (the presence of a line of application element templates; filling out a patent application form; assistance in compiling a description of an invention or utility model; support for multi-user work; integration with other systems; tracking the status of an application for grant of a patent, etc.). In addition, the qualification requirements for the service development team are structured in the form of the necessary knowledge, skills and practical experience. The main advantages of using the service for university students and other novice inventors are determined.
Possibility of using the Caspian Sea in agriculture with water shortage
Authors: Aliyeva Narmina , Ibraqimov Sattar , Abdullayeva Maya
Published: January 2024

The article provides information about the possibility of using Caspian Sea water as irrigation water for growing crops under current drought conditions in the republic. The studies carried out studied the chemical composition and degree of mineralization of the water of the Caspian Sea, and studied its effect on agricultural plants by mixing it with both clean and irrigation water in different proportions. In addition, the effect of seawater on washing saline soils was studied and it was found that loamy and clayey soils with a salinity level of less than two percent and a density of up to 5-6 g/l could be washed with seawater. Seawater with a concentration of 10-12 g/l can be used to wash highly saline and saline soils. It is also possible to wash soils with a light mechanical composition with natural seawater. In all three cases, at least 5000 m3 of fresh water per hectare is recommended to completely flush and remove residual salts from the soil.
Yield of different onion varieties depending on the level of mineral nutrition and growth regulators in the conditions of the Southern Forest-steppe of the Republic of Bashkortostan
Authors: Cherkashina Maria , Alimgafarov Rail , Kuznetsov Igor , Cherkashina Anna
Published: January 2024

The purpose of research was to determine the peculiarities of the action of Epin-extra, NPK+Epin-extra, Heteroauxin, NPK+Heteroauxin on the yield and chemical composition of onions in the conditions of the southern forest-steppe zone of the Republic of Bashkortostan. The novelty of the research comprises because for the first time in the conditions of the southern forest-steppe zone of the Republic of Bashkortostan the experiments with the participation of a new variety of Bashkirian selection - Iglinsky 2. Onion yield of the studied varieties Strigunovsky local, Red Baron and Iglinsky 2 in variants with different nutrition backgrounds was higher than in the control by 0.64-9.34 tonnes/ha. The amount of dry matter in varieties Strigunovsky local and Red Baron was higher than normal in all nutrition backgrounds. The maximum yield of onion was formed in Iglinsky 2 variety on the background of Heteroauxin application - 60.5 tonnes/ha or 116.57% in comparison with the control. The presence of weak negative correlation between yield and average daily temperature regime (r = -0.276) was established. A positive correlation between yield, precipitation sum (r = 0.481) and Heteroauxin (r = 0.470) was found. We can use the research results in cultivation of onion in the Republic of Bashkortostan and the Russian Federation, is of interest for foreign researchers-breeders.
Strong historical earthquakes around Osh city, Kyrgyzstan
Authors: Kamchybekov M. , Murataliev N. , Kamchybekov Y.
Published: January 2024

This paper presents data on strong earthquakes that occurred in the area around Osh city from various literature sources. The information on strong earthquakes of the past has been compiled on the basis of historical data. The catalog of strong earthquakes is given in the radius of 60 km from Osh city. A description of macroseismic data of these earthquakes is given.
Increasing employment of the elderly population for sustainable demographic development of the region
Authors: Gurieva Lira , Dzhioev Aleksandr
Published: January 2024

Russia, like a number of other countries, is experiencing a process of population aging, which is leading to an increased role in the employment of the older generation, while at the same time, employers have a negative perception of their labor potential. The article is devoted to substantiating the hypothesis that employment of older people is an important factor in demographic development. The object of the study is North Ossetia as a typical region of Russia with a worsening demographic situation and tension in the labor market. The work used methods of statistical and graphical analysis, the "resume test" method. The problem of discrimination in hiring workers of pre-retirement age. It has been shown that limited opportunities in the labor market for the older generation lead to a decrease in the level and quality of life, and degradation of human potential. Conclusions are drawn about a decrease in the efficiency of the regional labor market in terms of employment of the elderly. Recommendations are offered to regional bodies of state regulation of the economy on the institutional prevention of the practice of age discrimination among employees; development of flexible part-time employment models; organization of continuous professional training and advanced training.
Compliance of migration sentiments of the South Ossetia population of rural areas with the UN sustainable development goals: analysis of social factors
Authors: Gurieva Lira , Kaberti Nodar , Kulov Aslan
Published: January 2024

The UN Sustainable Development Goals (SDGs) UN General Assembly as “a blueprint for achieving a better and more sustainable future for all” are a common policy framework for developed, developing and poor countries. Despite active policies to implement the SDGs, achieving sustainable rural development still remains a pressing issue: for example, in many regions of the world there is an outflow of labor resources, which is a serious limitation for agricultural development. Purpose of the study: assessing the degree of influence of social factors on the migration of the rural population of South Ossetia in the period 1980-2023. The work used methods of statistical analysis and sociological research. Information base: official statistical data of Georgia and the Republic of South Ossetia, as well as data from three sociological surveys of 1980, 2010 and 2020. Main results: agriculture continues to be the most unattractive and low-paid area of employment in South Ossetia; the dominant factors of population migration from rural areas over the 40-year period of development of the region were unemployment, low incomes, underdeveloped social infrastructure. Conclusions: entering the trajectory of sustainable development of the region involves the comprehensive strategic development of the real sector of the republic’s economy, primarily agriculture, which has the highest potential for employment and financial and investment return. The strategy for sustainable development of rural areas should be based on using market opportunities and realizing the strengths of rural areas, as well as managing the risks of further migration and removing restrictions in the social sphere.
Prospects for the arctic shelf development
Authors: Boyarinov Andrey , Litvinova Olga , Teslyuk Lyudmila , Dukmasova Natalia
Published: January 2024

Nowadays development of the Arctic shelf and the continental slope resources is one of the most promising areas in the world oil and gas industry growth. Russia, unlike other countries with Arctic hydrocarbon reserves, implements only a few projects on the Northern shelf due to the difficult natural and climatic conditions and ecological vulnerability of the territory. The purpose of the article is to substantiate the feasibility of hydrocarbon resources development on the Russian Federation Arctic shelf in the long term. The article analyzes the external and internal factors affecting the decline in the rate of oil and gas exploration and production in this region in recent years. It considers state support measures reflected in the Strategy for the Russian Arctic Zone Development and Ensuring National Security – 2035, and a number of other laws and regulations developed and adopted after 2014. Special attention is given to the development of high-tech imports phase-out; specialists training; science, education and business integration; reducing the tax burden; environmental issues. The tasks facing state authorities, oil and gas companies, scientific and educational organizations have been identified that will lead to the successful Arctic shelf reserves development.
The effect of chassis weight optimization on the carbon footprint of the electric prototype vehicle
Authors: Winarbawa Heryoga , Prasetyadi Andreas
Published: January 2024

Electrification of vehicles has become increasingly widespread lately. It aims to reduce carbon emissions globally. Another step, namely reducing vehicle weight, is expected to reduce energy consumption during the operation. A vehicle part that can be reduced in weight is the chassis. This research compares the carbon footprint between the stock chassis and the lightweight version. The lightweight chassis requires additional energy during its fabrication. Life cycle analysis (LCA) is conducted to calculate the carbon footprint of each chassis. Material loss and manufacturing time are the main differences in the footprint. Manufacturing strategy is important in order to minimize the emission of the process. The lightweight chassis can reduce CO2 emission by 11% assuming 200 hours of operation. Therefore, optimization of the weight significantly reduces the emission.
Alternative method for stopping the coconut shell charcoal briquette drying process
Authors: Prasetyadi Andreas , Sambada Rusdi , Purwadi Petrus Kanisius
Published: January 2024

The drying processes of coconut shell charcoal briquette consist of drying and agglomeration. In industry, the drying process is determined by a quality control person, which creates dependency. The justification was conducted by firing and hardness checking. The firing test consumes a lot of time. An alternative method for determining the stopping drying process is proposed. The method is based on the resistance of the briquette in addition to density. One hundred and fifty cube briquettes of 2,6 cm x 2,6 cm x 2,6 cm in wet, half-dry, and dry conditions were tested for electricity resistance. The results show different resistivity of wet, half-dry, and dry. The dry has a resistivity of 1.82 105 Ω. The others have less than that number by order more than 10. Some doubts were found due to the low resistivity number close to half-dry condition. The density of the doubt was in the type. Therefore, a combination of density and resistance will be used to stop drying, which can be done quickly and out of the dependency of the quality control person.
Study of population distribution and benefits of Nipah (Nypa fruticans)
Authors: Eddy Syaiful , Taufik Mirna , Setiawan Andi Arif , Utomo Budi , Oktavia Maharani
Published: January 2024

The invasion of nipah (Nypa fructicans) occurred in the Air Telang Protected Forest (ATPF), Indonesia, as a result of mangrove forest degradation caused by anthropogenic activities in the area. This research aims to analyze the distribution of nipah populations in the ATPF and at the same time describe the benefits and potential of nipah both in the ATPF and in various regions in the world. The data collected in this research consists of two types, namely primary data and secondary data. Primary data was obtained through field surveys in the ATPF area, while secondary data was obtained through literature studies of relevant research results. Nipah populations can be widely distributed in degraded mangrove forest ecosystems and invade areas outside their natural habitat because they have high adaptability to the environment, high seed productivity and effective and adaptive seed distribution. Even though the spread of nipah in the ecosystem can hinder the succession of mangrove forests, it turns out that nipah has great benefits for the community and contains important compounds that are useful for making foods, drinks and medicine..
Reuse strategy and management models for abandoned industrial areas. A case study in Yerevan
Authors: Grigoryan Astghik , Manvelyan Zara , Sargsyan Emilya
Published: January 2024

In the conditions of ever growing urbanization and increasing prominence of the sustainability agenda the issue of urban quality is subject to prior consideration worldwide. In this context the revitalization of abandoned industrial areas entails the reconstruction of buildings, structures and spaces with significant functional potential. This paper explores the methodologies proposed for the reconstruction of abandoned industrial areas in Yerevan, focusing on elaboration of the environmental-economic criteria. This approach aligns with the principles of sustainable economic and urban development, considering comprehensive impact on environmental, social, and economic aspects throughout the entire reconstruction process. The developed methodology offers an inclusive analysis of existing environmental-economic conditions of the abandoned industrial areas of Yerevan, ensuring compliance with current legal norms and standards. The applied calculation method uses an innovative analytical formula that enables investors to estimate the projected costs more accurately and precisely. It is proposed to apply a new application developed using BIM technologies which provides an opportunity to carry out a systematic assessment and analysis of abandoned industrial areas based on formula averaged values of environmental-economic parameters. The tool also facilitates development of a management model that will allow evaluation of the feasibility of abandoned industrial area reuse. The conclusions derived from this study offer an exceptional opportunity to identify practical and optimal solutions for regeneration of the urban built environment, guided by the principles of sustainable urban development and by careful consideration of potential risks.
Coefficient of power of Indonesian traditional wind-pump blade model
Authors: Baskoro Albertus Naturally , Lukiyanto Y.B. , Erwandha Dionisius Brian Deva , Rines Rines
Published: January 2024

Indonesia has wind energy potential as a renewable energy resource which is currently being developed intensively. Salt farmers have used it with wind-pump as part of the traditional salt-making process. They have the ability to manufacture, operate and maintain the Indonesian traditional wind-pump. The aim of the experiment was to find out characteristic of windmill of the traditional wind-pump. The characteristics was expressed with relation of coefficient of power (Cp) and the tip speed ratio (tsr). The ratio of the wind mill model was 1: 2.5. The wind mill model consisted of four blades and 80 cm diameter. The experiment was done in a wind tunnel with wind speed of 5 m/s. The adjustable shaft load was electric machine. In the experiment, the wind speed range was 5.7 up to 6.3 m/s and shaft speed was 42.3 up to 387.4 rpm. The experiment resulted minimum and maximum tsr and Cp were 0.295 up to 2.705 and 2.623 up to 11.073, respectively. The experiment found out relationship of Cp and tsr in an equation Cp = -3.248 tsr2 + 12.29 tsr – 1.007. The equation showed that the traditional windmill model has maximum Cp of 10.62 at the tsr of 1.89.
Modeling study of boiler using oil waste as an energy source
Authors: Suprianto Stefanus , Tjendro  , Martanto  , Harini Bernadeta Wuri
Published: January 2024

Used oil waste is one type of waste that can be used as a source of energy. Waste oil that is used in this research is used as energy source for plasma burner and boiler plants. This final project is aimed at modeling a boiler with 3 input variables and 3 output variables (MIMO - Multiple Input Multiple Output). It's known that this MIMO system still exhibits interactions among the variables. To mitigate these interactions, a decoupler is designed. Subsequently, PID controllers are designed for this MIMO system. The PID parameter values are obtained through modeling using the Ziegler-Nichols method. The modeling is carried out based on the values obtained from the Ziegler-Nichols calculations, which are then implemented in Simulink within MATLAB. The test results indicate that employing a decoupler reduces the interactions between the systems. Therefore, Ziegler-Nichols and heuristic method is needed to find the PID parameter values. By utilizing the heuristic method, the system achieves stability with the value of Kp = 2,1, Ki = 0,005, dan Kd = 0 for the first variable, Kp = 0,0315 Ki = 0, dan Kd = 0 for the second variable, and Kp = 0,007 Ki = 0, dan Kd = 0 for the third variable..
Designing an environmentally sound sound-powered refrigerator
Authors: Patrick Chris
Published: January 2024

A heat-driven thermoacoustic refrigerator efficiently cools air with its novel bypass configuration.
Learning thermodynamically constrained equations of state with uncertainty
Authors: Sharma Himanshu , Gaffney Jim A. , Tsapetis Dimitrios , Shields Michael D.
Published: January 2024

Numerical simulations of high energy-density experiments require equation of state (EOS) models that relate a material’s thermodynamic state variables—specifically pressure, volume/density, energy, and temperature. EOS models are typically constructed using a semi-empirical parametric methodology, which assumes a physics-informed functional form with many tunable parameters calibrated using experimental/simulation data. Since there are inherent uncertainties in the calibration data (parametric uncertainty) and the assumed functional EOS form (model uncertainty), it is essential to perform uncertainty quantification (UQ) to improve confidence in EOS predictions. Model uncertainty is challenging for UQ studies since it requires exploring the space of all possible physically consistent functional forms. Thus, it is often neglected in favor of parametric uncertainty, which is easier to quantify without violating thermodynamic laws. This work presents a data-driven machine learning approach to constructing EOS models that naturally captures model uncertainty while satisfying the necessary thermodynamic consistency and stability constraints. We propose a novel framework based on physics-informed Gaussian process regression (GPR) that automatically captures total uncertainty in the EOS and can be jointly trained on both simulation and experimental data sources. A GPR model for the shock Hugoniot is derived, and its uncertainties are quantified using the proposed framework. We apply the proposed model to learn the EOS for the diamond solid state of carbon using both density functional theory data and experimental shock Hugoniot data to train the model and show that the prediction uncertainty is reduced by considering thermodynamic constraints.
Preparation of berberine magnetic nanoparticles and their inhibition of human gastric cancer BGC-823 cells
Authors: Liu Xianglong , Wang Jiao , Chen Bodong , Niu Ben , Li Jin
Published: January 2024

A new drug delivery system loaded with the drug berberine on carboxymethyl chitosan-coated magnetic nanoparticles (Fe3O4@CMCS-BBR) was prepared and characterized through x-ray diffraction, Fourier transform-infrared spectroscopy, a vibrating sample magnetometer, and transmission electron microscopy. By comparing the size of the uncoated nanoparticles (39.26 nm) and the size of the coated magnetite nanoparticles (73.75 nm), it was found that with the CMCS coating on the magnetite nanoparticles, the dispersion of the nanoparticle improved. The optimum pH testing showed a higher drug encapsulation of 51.23% and drug loading of 17.10% at a pH of 5.5 because of the better interaction of the NH3+ group with the negative functional groups of the CMCS. Furthermore, 85.89% of the drug was released within 72 h. The CCK-8 test results showed that Fe3O4@CMCS-BBR magnetic nanocomposites had good biocompatibility with gastric cancer BGC-823 cells and that Fe3O4@CMCS-BBR effectively inhibited the proliferation of cancer cells. The magnetic experimental results showed that Fe3O4@CMCS-BBR had good responsiveness to external magnetic fields and aggregated in the presence of a magnetic field. The results of targeting experiments showed that fluorescein isothiocyanate emitted a strong yellowish fluorescence in cells, which became stronger over time, and the killing effect on cancer cells became greater. The apoptosis results showed that the apoptosis rate induced by the magnetic nanodrug was 54.90%, indicating that the drug had a promoting effect on the apoptosis of BGC-823 cells.
Study of micro-mesoscopic creep damage on mudstone based on stress corrosion model
Authors: Ma Bochao , Zu Guoli , Li Xuehui , Shi Xinshuai , Xu Guangzheng , Qu Xinzheng
Published: January 2024

To study the creep minor damage evolution process and creep damage mechanism of mudstone, this paper establishes a numerical model of a two-media triple cementation particle flow procedure of mudstone, reproduces the tender damage destruction process of mudstone under creep based on a parallel bonded stress corrosion model, and explores the macroscopic creep characteristics and minor damage mechanism of mudstone specimens under different stress levels and surrounding pressure conditions. The results show that the intrinsic driving force for creep damage in mudstone is the micro-tensile force generated between non-homogeneous particles of mudstone, and the inter-particle cementation is continuously damaged and deteriorated with increasing time; the stable creep rate of mudstone specimens increases with increasing stress level and decreases with increasing surrounding pressure; high-stress levels diffuse microscopic damage in mudstone by increasing the magnitude of inter-particle microtension and the number of particles generating microtension, manifesting as multiple extensions of microcracks; the enclosing pressure dramatically reduces the creep characteristics by limiting the development of inter-particle micro-tensile forces; the microcrack distribution is more uniform and dispersed under the enclosing pressure conditions. The amount of mutual slip between particles increases.
Racial differences in parent response to COVID schooling policies
Authors: Baum Micah Y. , Jacob Brian A.
Published: January 2024

This paper examines whether school COVID-19 policies influenced enrollment differently by student age and race/ethnicity. Unlike much prior research, we i) analyze enrollments for virtually the entire U.S. public school population for both the 2020–2021 and 2021–2022 school years, ii) compare enrollment trends within districts in order to isolate subgroup heterogeneity from district characteristics, and iii) account for district selection into preferred learning modes. Analyzing data on over 9,000 districts that serve more than 90% of public school students in the United States, we find enrollment responses to COVID policies differed notably. We find that White enrollments declined more than Black, Hispanic, and Asian enrollments in districts that started the 2020–2021 school year virtually, but in districts that started in-person the reverse was true: Non-White enrollments declined more than White enrollments. Moreover, Black, Hispanic, and Asian families responded more than White families to higher COVID-19 death rates in the months preceding the start of the 2021 school year. In 2021–2022, enrollment differences by the previous year’s learning mode persisted. Racial/ethnic differences did not vary by whether the district required masking in classrooms. These findings are consistent with the greater risk faced by communities of color during the pandemic and demonstrate an additional source of disparate impact from COVID policies.
Inference of reliability model with burr type XII distribution under two sample balanced progressive censored samples
Authors: Lone Showkat Ahmad , Panahi Hanieh , Anwar Sadia , Shahab Sana
Published: January 2024

The balanced joint progressive censoring scheme gives guidelines for researchers in reducing the expense and period of the experiment with modified efficiency. In this paper, the stress-strength reliability model are considered and investigated, in which two independent samples are generated from Burr Type XII distributions under balanced joint progressive censoring scheme. In the classical analysis, the maximum likelihood estimate of the reliability parameter is derived, then the relevant confidence interval is provided based on the Fisher matrix. Under the Bayesian framework, the Lindley’s technique and hybrid Gibbs within Metropolis-Hastings algorithm are applied to acquire the estimates of the parameters, and the corresponding highest posterior density credible interval of the reliability model is also constructed. The reliability inference is realized by numerical simulation, and the validity of the inference method is analyzed based on the splashing data of silicone oil droplets impact (SSODI) under two surfaces wettability conditions.
Postponing entanglement sudden death by quantum interferences
Authors: Nair Anjali N , Arun R
Published: January 2024

We investigate the entanglement dynamics in a 2 ⨂ 3 quantum system consisting of a two-level atom and a three-level V-type atom interacting independently with their environments. Pure and mixed initial states, including one-parameter and two-parameter states of the atoms are analyzed. It is observed that the entanglement in the qubit-qutrit system disappears in a finite time, commonly referred to as ESD (entanglement sudden death). We analytically calculate the ESD time using the negativity as an entanglement measure. Remarkably, the presence of vacuum-induced coherence in the three-level atom (qutrit) delays the occurrence of ESD and effectively protects the entanglement from decoherence.