bluuebunny/crossref_metadata_2025_split huggingface dataset:
Voltage regulation for the reactive power elasticity improvement of distributed photovoltaics
Authors: Fu Ming , Chen Zhe , Lin Da , Li Zhihao 
Published: August 2024

Abstract
This paper proposes an enhanced method for improving the reactive power voltage support capability based on reinforced restraint. Due to the impact of load disturbances on distributed photovoltaic systems using traditional droop control, significant voltage fluctuations may occur, leading to the instability of the power system. In light of this, an enhanced voltage droop control method based on Q-learning and Pinning Control is introduced. The output voltage of distributed photovoltaics using traditional droop control is considered as the voltage deviation from the rated value. The Q-learning algorithm is employed to define appropriate sets of states, actions, and reward functions. The voltage deviation is then incorporated into the corresponding reward function, and the Q-table is updated based on the reward function values until the output voltage of the distributed energy sources stabilizes. Simulations are conducted on the modified distributed photovoltaic system and compared with systems using only traditional droop control methods. The results indicate that the distribution grid system employing the enhanced droop control based on reinforced learning and pinning control effectively addresses load disturbances.
Study on physicochemical properties of corn starch modified by dielectric barrier discharge (DBD) plasma
Authors: Wang Ziwen , Niu Jinhai 
Published: August 2024

Abstract
Starch, as a cheap and renewable biological material, has been widely used in the chemical industry, oil drilling, and other fields. However, there are still some shortcomings in natural starch, which often needs to be modified by some methods. The development and application of modified starch have attracted much attention. The use of low-temperature plasma methods to modify starch has gradually attracted widespread attention because there is no chemical impurity residue. DBD is a type of discharge that produces low temperature plasma. At normal temperature and pressure, plasma can be generated in a DBD reactor which uses air as discharge gas and adopts various electrode structures such as wire-column and plate-plate. The high-energy electrons, reactive nitrogen, and reactive oxygen species generated in the discharge can break chemical bonds when they act on the surface of biological materials, and then change the surface topography and physical and chemical properties of the materials.
Effect of calcium sulfate whiskers on mechanical properties and enhancement mechanism of metakaolin-based polymer mortar
Authors: Zheng Xiong , Zhao Gang , Jiang Ming , Guo Kuixiang , Cui Yu , Wang Jinsong 
Published: August 2024

Abstract
In consideration of the requirements of the repair mortar environment and in conjunction with the characteristics of the CaSO4 whisker, the addition method of the CaSO4 whisker was employed to enhance metakaolin-base polymer mortar, aiming to achieve reinforcement and toughening effects. Through experimentation, the influence of varying mass percentages (0.5%, 1%, 1.5%, 2%, 2.5%, and 3%) of calcium sulfate whisker on metakaolin-based polymer mortar was studied, focusing on rational energy utilization and mechanical properties. Optimal performance and mechanical strength were determined by proposing an appropriate content of calcium sulfate whisker and liquid-solid ratio for metakaolin-based polymer mortar, while microscopic experiments were conducted to analyze the strengthening mechanism behind polymer mortar with calcium sulfate whisker. The experimental findings show that with an increase in the calcium sulfate whisker content, the setting time of metakaolin-based polymer mortar initially rises, then declines, reaching the maximum setting time at 1% content. Additionally, at a liquid-solid ratio combined with a content level of 1.5% for calcium sulfate whisker, both bending and compressive strength are optimized for metakaolin-based polymer mortar. Calcium sulfate whiskers can alleviate the stress concentration at the tip of cracks within the geopolymer mortar, hindering crack development, and the bridging effect of the whiskers and the interface of the geopolymer mortar matrix in the high territories realizes the overall strengthening and toughening.
Development of a large-area array multi-point synchronous explosive circuit using sheet explosive detonated by a mild detonating fuse
Authors: Guo Zhiyun , Lu Qiang , Ding Yang , Li Jin , Zhang Liangyong 
Published: August 2024

Abstract
To meet the requirements of synchronous explosion loading of the large-area array in special experiments, a large-area array multi-point synchronous explosive circuit based on the thin sheet explosive detonated by a mild detonating fuse is designed. The explosive circuit is composed of a detonator, a mild detonating fuse, and a sheet explosive booster. In this study, the synchronization of initiation is analyzed theoretically, and the reliability test and synchronization test of the large-area array multi-point explosive circuit are carried out. The results show that the main factors affecting the initiation synchronicity include the length of the mild detonating fuse and the deviation of the detonating speed of the mild detonating fuse. The comprehensive initiation rate of the multi-point synchronous explosive circuit is 99.5%. The asynchrony ranges for the two-stage, three-stage, and four-stage synchronous explosive circuits are 0.32 μs, 0.37 μs, and 0.50 μs, respectively. This study provides a simpler and more efficient solution for achieving synchronous explosion loading of the large-area array.
Experimental study on the flow capacity of shale fractures with different degrees of sand filling
Authors: Chen Ting , Yu Chunlei , Sun Zhigang , Zhang Min , Sun Qiang , Liu Chenwei 
Published: August 2024

Abstract
By conducting tests on the flow capacity of shale fractures with different degrees of sand filling and conducting online CT scans on samples of different lithologies, it is recognized that as the sand concentration increases, the flow conductivity of sand-filled fractures increases and stress sensitivity decreases. Under low effective stress, the large particle size proppant filled sand fractures have higher diversion capacity. As the effective stress increases, the reduction in diversion capacity is significant, and the stress sensitivity is small. The particle-size-filled sand layer is strong. During the process of elastic pressure reduction and failure, the proppant is compacted, the pores of the sand layer are reduced, the crack width is reduced, and the conductivity is reduced.
Research on creep mechanical properties of flexible screen functional film layer
Authors: Ma Yuhua , Su Weiwei , Luo Xin , Hu Yubin , Yang Yiming , Zhou Geng , Xiao Yachao 
Published: August 2024

Abstract
The creep behavior of AMOLED flexible screens is a crucial consideration in the design and manufacturing processes. Various factors impact the creep process of AMOLED modules in thermoplastic polymers. However, experimental work typically only focuses on sustained stress over time at room temperature, neglecting other factors affecting creep strain. It is essential to explore the influence of creep on the bending performance of flexible AMOLED modules and analyze the creep curves of each film layer for the bending of flexible screens. Furthermore, the analysis includes the examination of the influence of the thickness and elastic modulus of the protective cover plate and support plate on screen bending at different temperatures, along with further creep analysis of the protective cover plate and the support plate. The mechanical exploration of the protective cover plate and support plate under 6-9 h creep response was analyzed, and the influence of the protective cover plate and support plate on screen bending performance was analyzed. We conduct stress-strain analysis on the protective cover plate at different temperatures (-40~120°C). Before the temperature increases to 80°C, the stress and strain increase with the increase of temperature, and after the temperature reaches 80°C, the stress and strain decrease with the increase of temperature. The temperature of the protective cover plate is 20°C, and the risk of bending failure is relatively low. The creep analysis of the support plate shows a small difference in the fracture strength between the support plate undergoing creep and the fracture strength not undergoing creep. The fracture elongation of the support plate at 20°C is 0.52%, and the fracture strength is 106 MPa. The fracture elongation of the support plate after heating also increases.
Study on the correlation and calibration of macro and micro parameters of discrete element model for sandstone
Authors: Hu Jiangchun , An Luyang , Huang Xuewei , Wang Chenxu 
Published: August 2024

Abstract
The effectiveness of numerical simulation of discrete elements for particle flow in sandstone depends on adjusting mesoscopic parameters appropriately. The parallel bonding contact model was used as the constitutive model for particle contacts to explore the relationship between macro and micro parameters and fine-tune the mesoscopic ones. The relationship between macro and micro parameters of sandstone was determined through laboratory tests and numerical simulation comparative analysis. Orthogonal tests, multifactorial analysis of variance (ANOVA), and regression fitting were used for analysis. The results show that each mesoscopic parameter of the parallel bonding contact model has a distinct and significant impact on macroscopic mechanical parameters, with interactive influences between them. The macroscopic cohesive force, normal strength of the parallel bond, and parallel bonding force exhibit non-linear relationships, while the macroscopic internal friction angle and the internal friction angle of the parallel bond have logarithmic relationships. Additionally, there is a linear relationship between the elastic modulus of the parallel bond and its macroscopic counterpart. The numerical simulation results are in close agreement with the laboratory test findings, validating the parameter calibration method.
Local Climate Identity in the Architecture of Traditional Mosques in Warm Humid Tropics: The Case in Lowland and Mountainous Regions of Aceh, Indonesia
Authors: Sari L H , Wulandari E , Idris Y 
Published: August 2024

Abstract
Climate plays an essential role in creating a thermally comfortable living. In warm humid tropics, the relative humidity is high which needs the airflow to decrease it hence minimizing the thermal comfort dissatisfaction felt by the building users. Mosque as a place for Muslims to perform prayer frequently five times a day also needs to be comfortable. In the old time when everything was still limited, the traditional mosque was designed to be comfortable naturally. Therefore, in this study, traditional mosques are investigated in terms of adopting the local climate into the architectural elements to provide comfort. The case studies are the mosques located in the low and mountainous region of Aceh which is warm humid but varied in air temperatures. The evaluated mosques are Indrapuri and Tengku Dipucok Krueng mosques in the lowlands; and Tue Kebayakan and Asal Penampaan mosques in the highlands. The study was carried out qualitatively through observation and documentation by redrawing the mosques. The parameters investigated were floor plans, façades, apertures, and building materials. An adaptation to the climate naturally is essential to save energy use and be friendly to the environment and is therefore called sustainable. Thus, this study would be beneficial in finding the difference in traditional mosque design between the lowland and mountainous areas in Aceh which performs the local identity for being an alternative in today’s mosque design to be naturally friendly to the environment.
The spatial pattern of earthquake-affected settlements in rural areas in Bantul
Authors: Sunoko K , Farkhan M , Kumoro A 
Published: August 2024

Abstract
Villages in Bantul experienced an earthquake in 2006. Settlements with a spatial layout pattern for village settlements “Java-rural” underwent major changes, marked by the collapse of the buildings inside and then being rebuilt after the earthquake, but their physical form and spatial layout were different from the previous pattern. This phenomenon creates gaps in the spatial understanding of settlements before and after the earthquake. Changes in the shape of buildings and spatial patterns of settlements that occur are very important issues to study. The implementation of the research was carried out using exploratory qualitative methods. Physical records are traced in depth to get the meaning behind their physical and spatial forms and the changes that occur. This study shows that post-earthquake residential buildings represent the experiences of residents in saving themselves during an earthquake. This situation forms a settlement layout with the arrangement of buildings closer to the main door-front yard-road. Between buildings form a courtyard space as a gathering point through a secondary door and courtyard.
Cultural Mapping of the Historical Tin Mining Town of Kinta Valley: The Revival of Papan Old Town
Authors: Ahmad Suriati , Nayan Nadiyanti Mat , Hussain Nur Huzeima Mohd , Zakaria Ahmad Zamil , Jones David S. 
Published: August 2024

Abstract
Located within the vicinity of the western region of the Kinta Valley lies several historic tin mining towns that were deserted and yet forgotten. This includes the old town of Tronoh, Siputeh, Pusing and Papan. The Papan old town was once the centre of the Western Kinta Valley tin mining towns and settlements that emerged from its importance in the 1880s. Tin mining is the heritage industry that crafted the industrial landscape of the Valley, resulting in a massive migration of Chinese and other races (including the Malay Mandailing) to Malaya in search of tin glory. However, due to the collapse of the world tin market in the 1980s, this scenario has further resulted in the abandonment of the majority of these old tin towns as, sadly, the Papan ruinous urban fabric begins to deteriorate today. Considering this alarming situation, this study aims to explore the cultural landscape mapping layering the historical, spatial, and cultural narratives that contemplate the Papan old tin mining town. Therefore, a qualitative approach has been designed for data collection and analysis. The findings of the cultural landscape mapping can highlight the importance of this old tin mining town abiding by their survived industrial urban fabrics that strategically integrate into sustainable planning and cultural resource management, further linking to cultural heritage tourism activity in Kinta Valley.
Daylight performance for work-from-home workstation: A case study of a residential condominium unit in Bangkok
Authors: Ploycharoen N , Borisuit A , Suriyothin P 
Published: August 2024

Abstract
Work-from-home plays an important role in nowadays human’s working life due to changes in our behavior from Covid-19. According to Bangkokian’s office workers who usually accommodated in residential condominium, it becomes both home and office, they spend their typical office hours, such as 8AM to 5PM, working at home when daylight is available. Besides visual performance, receiving sufficient daylight exposure complies with lighting recommendation helps promote productivity, well-being, and avoids visual discomfort can leads to users’ satisfaction in daylight. This paper aims to assess daylight performance and daylight visual comfort of a case study of residential condominium unit in Bangkok, recommending the best scenario of furniture layout and workstation that compatible with daylight recommendation, promoting better daylight satisfaction. To assess daylight performance, sDA, ASE, and UDI are used. Daylight glare (DGP) is required to help determine workstation locations. Computer simulation using Climate Studio for Rhino v.7 had performed facing four directions (North, South, East, and West) of a residential condominium unit, studio type room, with CBDM method and TMY weather files of Bangkok, Thailand. The results show that North is the best direction of all four directions. Complies with all three indices of daylight performance, had minimum DGP limit, and had four appropriate locations for workstations. The other three orientations had fewer workstation locations, worse daylight performance and daylight glare respectively. The lesson learned is interpreting combination of indices help determine the result more precisely than interpret single index. Moreover, to be more considerate on interior furniture layout, it may not be arranged similarly in all directions. It is crucial to assess not only daylight performance indices but also index presented glare from daylight, to generate interior furniture layouts that are suitable for each direction.
Assessment of Recreational Activities and Greening of Urban-Parks in Kharkiv
Authors: Honcharenko Y , Sokolenko U , Oleksiichenko N , Sokolnyk A 
Published: August 2024

Abstract
Urban-parks, as sports and gaming locations, are a new type of landscape facilities in Ukraine, the first of which were created in Kharkiv. The three urban-parks in Kharkiv have been studied: Molodizhnyi, Saltivskyi and urban-park on Yuriyeva Bulevard. Recreational studies and plant inventories have been conducted to determine the popularity of the parks in 2021. The recreation surveys considered two indicators: the degree of recreation and the length of time visitors spent in the park. Field surveys were conducted in August and October. Saltivskyi urban-park was the most visited, and Molodizhnyi park was the least visited. The presence of playgrounds for pre-school children and children with disabilities makes Saltivskyy more attractive. The calculation of the average length of stay of the visitors on the territory showed that the visitors spend from 1,3 h/day to 1,77 h/day in the urban-parks. It is possible to identify shortcomings in the design of urban parks and make suggestions for their improvement based on the results of recreational load and greenery inventory assessment in urban-parks. The inventory showed that the area of green spaces in the urban-parks has decreased as a result of reconstruction. The level of greenery in Saltivskyi and Molodizhnyi urban parks is rather low and does not meet national regulatory requirements. There are 28 plant taxa of 11 families used in landscaping of the urban-parks, the greatest diversity in Molodizhnyi has been observed. It is necessary to optimize the existing assortment of plants. Some of them are not in a good sanitary condition, which has a negative impact on the overall decorative appearance of the plants and the parks in general.
Modern trends in the creation of luminescent silicate ceramic and glass materials for industry and technology
Authors: Savvova Oksana , Yefimov Oleksandr , Tur Oleh , Zaitseva Inna , Fesenko Oleksii 
Published: August 2024

Abstract
The main types of phosphors and the prospects of their application in luminescent silicate ceramic, glass materials and coatings for industry, technology and construction are analyzed. Basic requirements for phosphors for solving the problems of evacuation systems and emergency lighting have been established. The choice of photoluminophore compositions in the production of photoluminescent glazes with a long afterglow is substantiated. The peculiarities of the use of industrial photoluminophores based on strontium aluminates in the production of transparent protective glass coatings for ceramic tiles, which are obtained under conditions of high-temperature single-stage firing, have been established. The prospects of creation and the main directions of research in the production of photoluminescent glazes with a long afterglow based on ecologically low-value domestic raw materials for solving the problems of lighting in crisis situations are determined.
The influence of chloride ion diffusion on the structure of cement composites containing carbonate additives
Authors: Borziak O , Zhuravel V , Hudymenko M 
Published: August 2024

Abstract
One way to reduce the diffusion of chlorides deep into concrete is to bind chlorine ions into stable hydration products. It is known that systems containing carbonates have an increased binding capacity towards chlorides. The goal of this work is to study the effect of carbonate additives on the depth of diffusion of chlorine ions in cement composites (mortars). As controls, samples of mortar were made using cement CEM I 42.5 R as binder. In the main samples, 15% of cement was replaced by carbonates - chalk and limestone. The strength characteristics of mortar samples kept in water and in a sodium chloride solution were studied. According to test data, it was established that the compressive strength of samples with the addition of chalk or limestone practically does not change under the influence of a chloride solution. The compressive strength of samples without additives in the salt solution decreased by 8%. The depth of diffusion of chlorine ions deep into cement composites was also studied. It has been established that replacing part of the binder with carbonate additives does not reduce the permeability of porous cement composites for chloride ions.
Thermal insulation coating based on water-based polymer dispersion
Authors: Natalia Saienko , Anna Skripinets , Galina Gurina , Leonid Saienko , Oleksandr Hryhorenko 
Published: August 2024

Abstract
The paper presents a study on the development of thin-layer thermal (with a thermal conductivity coefficient ranging from 0.0416 to 0.083 W/(m·K)) insulation coatings based on styrene-acrylic aqueous dispersion with improved adhesion properties and regulated technological characteristics. The simplicity and speed of applying liquid thermal insulation provide significant advantages over standard insulating materials. An advantage is the ability to insulate surfaces of complex configuration.
Analysis of the implementation of the Sustainable Urban Development Goal in Ukraine
Authors: Blinova Maria , Rodyk Yanina 
Published: August 2024

Abstract
This article aims to analyse the transformation of ideas about “sustainable development” and compare the approaches to implementing this concept across different levels. It is demonstrated that sustainable development is developing dynamically, with each stage identifying certain shortcomings and proposing changes in its interpretation and implementation measures. The goal is to understand how this process has occurred, from international UN documents to the level of state legislation in Ukraine and local authorities, including local and professional communities. The focus is on problems related to the urban environment, specifically the implementation of the SDG “Sustainable development of cities and communities.” The article discusses the differences in interpretation and approaches to this goal at different legislative levels. It is argued that a transition is occurring at the national level, moving from general abstract principles to specific action plans and the identification of priorities. However, the strategic directions of implementation still need to be correlated with local initiatives. The scientific novelty of this article is its comprehensive analysis of the evolution of the sustainable development concept at various levels and its practical value is in providing insights for policymakers and professionals working in the field of sustainable urban development.