bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on engineering selection methods for electromagnetic lines and insulation materials of UHV converter transformers under extreme margin conditions
Authors: Yu Xinru , Wu Chao , Cheng Huanchao , Wang Chaohua , Zhao Yongfeng , Deng Junyu 
Published: August 2024

Abstract
As the transmission capacity of the ± 800 kV ultra-high voltage project is increased to 10 GW and the ± 1100 kV project capacity is increased to 12 GW, the requirements for the flow level of various equipment have been improved. Due to the limited overall design size, the design margin of the converter transformer is approaching its limit. Due to the weight of a single converter transformer reaching hundreds of tons and the huge amount of material used, the physical property testing for a single electromagnetic wire and a single insulating cardboard in the existing IEC standards can no longer meet the requirements for engineering use. This study focuses on the main materials of converter transformers and researches material selection methods for the operating conditions of ultra-high voltage equipment. The selection scheme for electromagnetic wires, insulating cardboard, and insulating screws of ultra-high voltage converter transformers has been determined. The results of this study can be used to select converter transformer materials in ultra-high voltage engineering and improve the reliability of power equipment operation.
Influence of high strain rate and catalyst concentration on dynamic impact behavior of vitrimers
Authors: Xiang Rui , An Le 
Published: August 2024

Abstract
Vitrimers are dynamically cross-linked networks with dynamic covalent bonds, possessing attractive mechanical robustness, self-healing, re-processability, recyclability, and shape memory properties. Therefore, vitrimers hold promise for applications including aerospace and transportation, in which cases the structures will inevitably be subjected to dynamic loading. The objective of this study was to characterize the dynamic impact behavior of vitrimers utilizing the Split Hopkinson Pressure Bar (SHPB) experiments. Five kinds of vitrimers containing different concentrations of catalyst Zn(acac)2 of 0.1, 1, 3, 5, and 10 mol% and two strain rates 2000 s-1 and 4000 s-1 are considered. These vitrimers exhibit strain rate dependence, whose yield stress and strain softening effect is enhanced when the strain rate is increased from 2000 s-1 to 4000 s-1. Catalyst concentration significantly affects the dynamic performance, and the vitrimer with 10 mol% catalyst shows the most pronounced strain softening, the highest yield stress, and the best impact energy absorption properties. The results provide fundamental data and strategies for improving the impact resistance of epoxy for engineering applications.
Study on the structure of the cowl based on optimal water dynamic characteristics
Authors: Wang Tian , Li Mingxuan , Tang Jia , Liu Yuhan , Li Wenbo 
Published: August 2024

Abstract
Fluid mechanics makes us realize the complexity and variability of the fluid force, so the shape of the fluid contact surface will have a great impact on the energy capture power of the generator set. In this paper, a symmetrical airfoil deflector is designed to improve the energy capture power and the conversion efficiency of the current energy unit under the condition of low flow velocity, and the selection of parameters such as inner diameter, chord length, and angle of attack and their growth effects are analyzed by finite element analysis. The three-dimensional finite element model of the underwater fairway is established by using the ANSYS finite element method. Through finite element calculation and analysis, the velocity vector diagram is obtained. The results show that the speed increase efficiency of the aerofoil baffle is 80% higher than that of the traditional one, and the energy capture power is greatly increased.
Generalized mixed element method of plane problems in cartesian coordinate and its applications
Authors: Tian Yunze , Qing Guanghui 
Published: August 2024

Abstract
In finite element methods, constructing elements in Cartesian coordinates facilitates the introduction of interpolation functions with mechanical properties. This article will start from the generalized mixed variational principle and establish an 8-node mixed finite element method based on the expression of rational finite elements in the Cartesian coordinate system, in which the stress interpolation function satisfies the equilibrium equation of two-dimensional problems. This element provides convenience for the introduction of stress boundary conditions and can solve both displacement and stress variables simultaneously. The numerical analysis of several classic examples shows that the stress interpolation function satisfying the equilibrium equation can improve the accuracy of numerical results for displacement and stress fields. Especially for the sparse mesh model, the accuracy of the shear stress results is significantly better than that of the conventional displacement element.
Numerical simulation of single abrasive grain grinding of silicon carbide surface
Authors: Guo Zhiquan , Ma Luchao 
Published: August 2024

Abstract
Silicon carbide (SiC) ceramics are extensively employed in aerospace and mechanical manufacturing owing to their outstanding material properties. However, their inherent high hardness and brittleness pose challenges in product processing. Utilizing the classical Johnson-Holmquist (JH-2) constitutive model in finite element simulation technology can facilitate the analysis of the impact of various grinding parameters on material surface damage. This approach yields valuable insights for selecting optimal processing parameters. The simulation of SiC surface grinding with single diamond abrasive grains demonstrates that grinding force increases with grain penetration depth. The resulting stress elevation promotes the accumulation of surface cracks, exacerbating material surface damage and abrasive wear. Furthermore, the damage to SiC surfaces is affected by grinding speed. A higher speed can lower grinding force, reduce abrasive wear, and enhance SiC surface smoothness. Nonetheless, increasing grinding speed also elevates residual stress in the workpiece due to higher kinetic energy. Hence, controlling the grinding wheel speed within a specific range and minimizing wheel surface penetration depth can effectively enhance SiC surface processing quality and prolong tool lifespan.
Analysis of ventilation conditions in the rumoh aceh exhibition museum
Authors: Muslimsyah  , Nizarli  , Safwan  , Edytia M H A , Huda K , Muftiadi  
Published: August 2024

Abstract
The traditional Acehnese house museum, which serves as the research focus in analyzing the ventilation conditions for air exchange. The air conditioning system in this house only uses natural ventilation which is channeled through the ventilation in the house. Therefore, it is necessary to analyze the performance of the passive cooling system against the provisions in the Indonesian National Standard (SNI). This study uses an experimental method. Data collection techniques in the form of measurement data using a Digital Anemometer and also the ACPH (Air Changes Per Hour) calculation system, and minimum opening area. The results of this study refer to SNI by modifying the data obtained from the measurement results and comparing them with the level of thermal comfort according to the index used. The results that can be concluded from this study are the wind speed with the highest value on the east side of 0.45 m/s and the lowest value of 0.28 m/s on the south side and with an average wind speed of 0.36 m/s per side, which is in accordance with the SNI-03-6572-2001 index with a minimum wind speed of 0.25 m/s. The average value of ACPH at Rumah Aceh is 4.06 times per hour, meaning that the value meets the standard requirement for air change, which is worth 1-5 times. While the percentage value of the minimum opening area to the floor is 11.5% where this figure already meets the minimum opening which is equal to 10% of the floor area and a maximum of 20% of the floor area.
Indoor Air Quality inside Smoking Rooms with Air Conditioning. Case study : smoking rooms in public areas
Authors: Wicaksana Yoas , Winarto Yosafat , Yuliani Sri 
Published: August 2024

Abstract
Indoor air quality is influenced by chemicals substances from within the room and external factors. Smoking room with air conditioning in a coffee shop is an attractive choice for smokers even though room users rarely understand the actual room air quality conditions. The research aims to evaluate the potential decrease in indoor air quality for smoking room equipped with air conditioning in coffee shops. The study was conducted at 2 coffee shops in Surakarta, Indonesia by measuring air quality parameters, including PM2.5, PM10, and the CO2 concentration produced by cigarette smoke, the particulate meter was placed in the smoking room, and the open space around the coffee shop, measurements were carried out for 3 days in a row at the same time each day. The data collected is analyzed using multiple linear regression methods. The results of the research showed that the indoor air quality of smokers with air conditioning has higher particulate concentrations of PM2.5, PM10, and CO2 above air quality standards set by Indonesian ministry of health. The results of the research are recommendations for improving air quality, considering alternative design solutions, such as using smoke suckers and improved ventilation designs in coffee shops that provide smoking rooms with air conditioning.
Evaluating the Spatial Planning Intervention for Better Cities Post-Pandemic
Authors: Hashim Noor Ismah , Rani Wan Nurul Mardiah Wan Mohd , Kamarudin Khairul Hisyam , Wahab Yusrin Faiz Abd 
Published: August 2024

Abstract
Cities play a significant role in ensuring sustainable economic growth, directly impacting the quality of livelihood among their inhabitants. The COVID-19 pandemic has caused a substantial impact on the changes in the city function that have changed the way people interact in cities. Spatial planning interventions have the potential to be pursued post-pandemic because some spaces have become abandoned, underutilised, or have changed their purpose due to the pandemic. In line with this, the present study aims to discuss the issues that the COVID-19 pandemic has brought to cities and evaluate how spatial planning interventions would build back better cities post-pandemic. The data was collected using the qualitative research approach via semi-structured interviews and focus group discussions. Five representatives from five countries within the Asia Pacific (Australia, Indonesia, Japan, Malaysia, and Singapore) were gathered to select the interviewees. Four interviews were conducted via Microsoft Teams due to travel restrictions imposed during the COVID-19 pandemic, while one was conducted face-to-face (Malaysia). Subsequently, a hybrid Focus Group Discussion (FGD) involving eight participants was conducted to verify and validate the information gathered. Data collected was later analysed using the thematic analysis technique. Key findings revealed that the spatial planning intervention includes the adaptive reuse of space, zoning modification, smart city, 15-minute city and natural resources preservation and conservation. The interventions can also be part of the response, mitigation, and preparedness strategy for future pandemic attacks. In addition, it contributes to adaptive and disaster-resilient cities that can support sustainable development.
The Role of Lighting on the Atmosphere of the Reading-Room USK Library Journal
Authors: Umayrah Elda , Nursaniah Cut , Irwansyah Mirza , Qadri Laila , Huda Khairul 
Published: August 2024

Abstract
Lighting is an important element in architectural design, especially for spaces that accommodate reading activities. The role of lighting is to create a comfortable atmosphere in learning, reading and writing activities. This paper discusses lighting in the journal room of the Universitas Syiah Kuala (USK) library, especially in the reading area and book storage shelves, to determine the effect of the role of lighting in creating an atmosphere that can provide visual comfort for library room users. The method used is observation and assessment through the study of literature related to this study. The results and conclusions drawn are explained descriptively in accordance with the observations made by the researcher. The role of lighting in the room under study has not been maximized, due to the uneven distribution of lighting, and there is no lighting that gives a visual impression that creates an aesthetic effect. Further research is needed to calculate light requirements and re-design the room to address visual discomfort and meet required lighting standards.
Experimental Study of the Room Temperature and Relative Humidity in Javanese House in Baluwarti, Surakarta Sunanate Palace
Authors: Marlina Avi , Ariawan Dody , Adriyanto Feri , Harsito Catur 
Published: August 2024

Abstract
Controlling temperature and relative humidity in storage and exhibition areas is crucial for the long-term preservation of cultural heritage buildings. In this research, temperature and relative humidity measurements were conducted in the cultural heritage buildings, namely Javanese houses in Baluwarti, which is located in Surakarta Sunanate Palace. The study aimed to predict undesirable indoor environmental conditions such as excessively high or low relative humidity. Measurements were taken by recording room temperature and humidity three times a day for Pendopo Room in the Javanese House. The accuracy results were categorized as high, medium, and low based on the measurement data. The measured sensor data of temperature and humidity in the rooms were then compared with the climate data for a period of seven days. Both types of data were collected, and these data could make analized using surfer v.25 of the distribution of room temperature and humidity in the Baluwarti Javanese houses. The highest temperature in the Pendopo room is 32.3 °C in the western area of the Pendopo room during the day. In comparison, the highest humidity is 77.9% in the southern region in the morning. The lowest temperature was found at 27.0 °C in the south in the morning. In comparison, the lowest relative humidity is 59.8% in the middle area of the Pendopo room during the day. The results of this study can be used to understand the distribution of room temperature and humidity and to predict room temperature and humidity, thereby giving longer protection to the parts of these historical buildings like the wooden materials and furniture that have become Javanese cultural heritage.
Revitalization Model for Ancient Buildings and Environment in The Cultural Heritage Village Kauman Surakarta
Authors: Musyawaroh M , Pramesti L 
Published: August 2024

Abstract
This paper introduces the Culture-Power Triangle Revitalization Model, which is based on three pillars: santri culture, batik culture, and spatial patterns of ancient villages. The first pillar summarizes the potential for social harmony in the santri culture. The second pillar represents the economic-cultural potential packaged in batik culture, previously the village’s main economic activity. The spatial pattern of the ancient village, which symbolizes the environment of the capital city of the Islamic Mataram Kingdom, is the third pillar embodied in this model. This model is suitable for revitalizing Kauman as a religious and batik tourism area. From the discussion, the Cultural-Power Triangle Revitalization Model combines cultural, economic, and environmental aspects based on community empowerment, provides a holistic solution for revitalization, and encourages sustainable development while preserving cultural heritage. This revitalization process underscores the involvement of local communities and highlights the need for balanced and sustainable development in all aspects. This model provides valuable insights and can be applied to revitalize other cultural heritage villages in Indonesia. To strengthen this research, further research is needed using the “Power-Cultural Triangle” revitalization model in other similar cultural heritage villages, such as the Kauman Cultural Heritage Village, Yogyakarta.
Two different traditional house character in Koh Yao Noi Island, Thailand
Authors: Kirana Sriwinarsih Maria , Prayoonhong Rutairat , Halim Erwin Ardianto 
Published: August 2024

Abstract
People call this island “a Palm-Speckled Oasis” in the Phang Nga Bay. It is Koh Yao Noi, an island in Phang Nga Province that has many areas. There are a total of 7 villages, whether it’s a community zone are agricultural areas, conserved forests, or mangrove forests around the island that have areas for fish farming with the abundance of resources. The objective of this research was to study two different traditional settlements character and the vernacular house of Koh Yao Noi based on two different community daily work, rubber farmer and fisherman. Because there is a different working field, the settlement is divided into two areas as well. While traditional houses are built in a specific place, study in geography and material will give understanding on how the community interprets the environment of their living place. This settlement study on Koh Yao Noi Island will be focused on research question: what is the character of traditional house in Koh Yao Noi? This is qualitative research where data is collected from site visit, interview, observation and site documentation. The study will focus on traditional settlement character within two different contexts, the house structure, and material house. From the two different environmental characters in the community, that have different livelihoods, building a house that has been passed down for generations has become unique based on the context in accordance with local wisdom they have. Even though in different environmental, there are character similarity of traditional houses in Koh Yai Noi are light, simple, and adapted to the environment
Environmental Aspects and Historical Development of Colonial Architectural Heritage in Aceh
Authors: Dewi Cut , Izziah  , Maharani Lisa 
Published: August 2024

Abstract
Colonial architecture is an architectural style derived from a mixture of European architecture that adapts to the local environment and climate, in this case the tropical climate of Indonesia. Therefore, colonial architecture is one of a good example of some traces of climate and environmental effects on built environment. Thus, this study wants to examine the environmental adaptations of colonial buildings in Aceh by taking examples from Banda Aceh. The city is amongst important cities during the Dutch colonial occupation. This research uses qualitative methods with observation, interview, and archival studies and documentation. This research aims to tie together the literature review of the historical narratives, climate adaptation, and cultural adoption of colonial architecture especially in Aceh and how it relates to wider Indonesia context. It uses some fieldwork data and analysis undertaken in Aceh. This study shows that raised-floor building and uses of timber are amongst obvious traces of environmental adaptations to Aceh. Through its historical developments, colonial architecture has adapted to tropical aspects. This highlights the importance of climate and environment in shaping colonial buildings and the ways in which colonial buildings adapts to local conditions to create functional and aesthetical spaces. Thus, further study can be undertaken to see how then cultural and environmental aspects influence the development of colonial architecture in contemporary uses and its conservation dilemma.
Basics of the advanced calculating method the fire resistance of the section of an eccentrically compressed reinforced concrete element
Authors: Butenko S V , Iakymenko M V , Koliesnikov S M 
Published: August 2024

Abstract
The paper considers the issue of some special features in fire resistance calculations of an eccentrically compressed reinforced concrete element and propose new approach for calculating the fire resistance, based on the advanced formula of the stress-strain diagram for concrete depending on temperature. It has been shown that due to the change of the temperature field during a fire a change in the strength and deformation characteristics of concrete and reinforcing steel occurs as well, which, accordingly, leads to a change in eccentricity over time, that is, the eccentricity value is variable and depends both on the internal characteristics of the element (class of concrete, reinforcement) and from external factors (type of fire, time, loading). Formulas for calculating the eccentricity of an eccentrically compressed rod reinforced concrete element for a specific fixed moment of time are presented. There are also given the coordinates of the cross-section core and the center of central compression. It is possible to obtain the dynamics of changes in the eccentricity of a compressed rod reinforced concrete element during the time of the fire by doing such calculations for certain moments of time.
Experimental and numerical analysis of T-stub steel component under static loading
Authors: Solodovnyk Y Y , Riumin V V , Plotnikova N V , Semenova L V 
Published: August 2024

Abstract
Beam-to-column connections are of great importance in steel frames. For the tension zone of a steel joints, the estimated ultimate bearing capacity is of greatest interest. In recent years, there has been an increased interest among steel structure specialists in large deformation characteristics of T-stub to evaluate the bearing capacity of bolted joints. In Ukrainian normative documents, in comparison with European ones, there is no information about the ultimate bearing capacity of beam-to-column connections. For numerical and experimental studies, equivalent reference T-stub were used, and all characteristics of the steel used were taken into account in the mechanical model of the part. At the second stage of this research, 48 numerical models of the T-stub were calculated. The effect of variation in model characteristics such as bolt diameter, distance from web plate to bolt centerline on the bearing capacity of the models was investigated. Numerical experiments were carried out using ANSYS Workbench. The proposed models take into account the nonlinear behavior of the model material and the nonlinear interactions between its different parts. The proposed finite element model was further calibrated using the test results obtained with the laboratory program. Some important aspects of the numerical study of the problem, namely strain hardening and contact phenomena, are included in this paper. In addition, verification of the codified damage mechanism has been carried out.