bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fallout Futures
Authors: Höglund Johan 
Published: July 2024

AbstractThis chapter poses that the writing analysed in the book can be considered as a form of ideological and intellectual residue or pathogen released by the core and invading the American imagination. Just as nuclear fallout travels via the stratosphere to all parts of the planet, this ideological fallout, energised by neoliberal globalization, reaches across the globe where it is shifting human environmental concerns towards an understanding of the future as a personal, regional and/or national security concern. The aim of the final chapter is to refocus the needs of the planet as an entangled, multispecies habitat in the process of being destroyed by militarised capitalism. This chapter thus turns to climate narratives from the peripheries and semiperipheries that exist in close proximity to the US core. These, the chapter shows, register capitalism’s epochal crisis from a radically different position and, in doing so, perform important imaginative work that makes it possible to think outside of the intellectual boundaries established by capitalism and the American Climate Emergency Narrative.
Theory and Previous Research
Authors: Chanda Chiseni Michael 
Published: July 2024

AbstractThis chapter delves into theories explaining Africa’s postcolonial economic development, with a focus on institutions, human capital, and the often-overlooked role of Christian missionaries. It explores how initial colonial setups, particularly missionary activities in education and healthcare, have lasting impacts on contemporary development. Through a concise examination of existing research, the chapter sets the stage for understanding the nuanced dynamics shaping Africa’s post-independence economic trajectory.
Experimental Study on Parameters of Hardening Soil Model with Small Strain Stiffness for Muddy Silty Clay and Silty Sandy Soil in Yangtze Floodplain Area
Authors: Wang Yaning , Wei Desheng , Zhai Lei , Qin Huilai , Chen Zheng , Zhu Yuxuan 
Published: July 2024

AbstractTo obtain test parameters for the hardening soil model with small strain stiffness (HSS) of the muddy silty clay and silty sandy soil in the Nanjing Yangtze River floodplain, the following tests were conducted: consolidation test, consolidated-drained triaxial test, triaxial loading and unloading test, resonant column test and other common geotechnical tests. These test parameters included reference tangent modulus Eoedref, reference secant modulus E50ref, reference unloading and reloading modulus Eurref, failure ratio Rf, etc. A standardized process for determining HSS model parameters of certain types of soils, including relevant laboratory tests procedures, calculations, and analyses, has also been discussed. The test findings conclude with a summary of the model parameters for the typical strata in the Yangtze River floodplain region, providing engineering reference value for the deep foundation excavation and other relevant projects in the Yangtze River floodplain area.
Potential Instability Modes and Support Stability Analysis of Soil Accumulation Slopes Along the Lexi Expressway
Authors: Wu L. S. , Li C. F. , Li T. B. , Ren Y. , Wen Y. , Zhang J. S. , Yang J. F. 
Published: July 2024

AbstractGeological conditions along the Mabian-Zhaojue section of Leshan -Xichang Expressway are complicated, and during the construction process, landslides and geologic hazards are frequent under the influence of engineering excavation disturbance. In view of the deformation, damage and development and evolution of soil slope under excavation disturbance widely existed along Leshan-Xichang Expressway, taking the soil accumulation body slope on the left side of the section from ZK125 + 654 to ZK125 + 775 along the route as the research object, the potential deformation and damage mechanism and the stability of excavation support were analyzed by using FLAC 3D software. The results show that under the unsupported excavation condition, the slope is mainly dominated by creep-slip deformation of the slope surface; under the unsupported rainstorm condition, the slope undergoes large-scale destabilization damage with excavation. In the excavation and support process, as well as in the rainstorm condition after the completion of support, the stability of the slope as a whole and the support structure are better. The slope is a creep-slip-pulling earth slide in which the rock and soil bodies on the surface of the slope body are sheared off at the potential shear sliding surface in the slope body under the multiple effects of engineering disturbance, rainfall and gravity, and the slope body as a whole is subjected to unloading and traction at the leading edge and squeezing and pushing at the trailing edge, and then it slides along the circular arc shaped shear sliding surface in the accumulation body.
Cause Analysis and Research of Influence Factors of Cracks in Railway Tunnel Lining Concrete
Authors: Zhao Yuhui , Yu Chaoyang 
Published: July 2024

AbstractAiming at the cracking of railway tunnel lining concrete, the cracking reasons were analyzed, the non-load factor was determined as the main reason, and the main factors which affecting the shrinkage cracking of lining concrete were discussed in this paper. On this basis, the influences of binder content, unilateral water content, sand ratio and limestone powder content on cracking sensitivity of lining concrete were studied, by using dry-shrinkage, flexural strength and splitting tensile strength as the evaluation indexes of cracking sensitivity of concrete. The results show that the binder content has a significant effect on the dry-shrinkage of lining concrete, and the 56d dry-shrinkage value of concrete increases by about 8% with the increase of 20kg binder. The flexural strength and spitting tensile strength of lining concrete firstly increase and the decrease with the decrease of unilateral water content, and the unilateral water content should be controlled at about 140 kg/m3–145 kg/m3. The increase of sand ratio is unfavorable to the cracking sensitivity of lining concrete. The flexural strength and spitting tensile strength of lining concrete tend to decrease with the increase of limestone powder content, and the limestone powder content should be controlled within 20%.
Evaluation and Analysis of the Effect of Anti-slide Piles Around Pile Foundations of Super Large and Large Span Projects
Authors: Zhang Nan , Dai Ya , Wang Bo , Li Boyi , Xu Weizhou , Ye Chao 
Published: July 2024

AbstractIn this study, the three-dimensional finite element numerical analysis was carried out on the anti-sliding characteristics of cement mixing piles around the foundation of the north collapse tower, and the influence of the length and number of rows of anti-slide piles around the pile foundation on the deformation of the pile foundation was systematically studied. When the anti-slide pile length increases from 0 m to 20 m, the pile foundation deformation decreases with the increase of the anti-slide pile length, but the decrease rate is less than 5%. When the length of the anti-slide piles is 10 m and 20 m, after the anti-slide piles on both sides of the large-span foundation increase from 3 rows to 5 rows, the horizontal and vertical deformation of the pile foundation decreases, but the deformation of the pile foundation decreases. Less than 2%. By installing tie beams, the four pile groups of the large-span foundation form an integral structure. The overall horizontal resistance is already strong, but the horizontal resistance provided by cement mixing piles is limited.
Development of Pre Drilling In-Situ Rock Mass Shear Measurement System
Authors: Zhong Zicheng 
Published: July 2024

AbstractIn engineering construction, it is of great significance to calculate the shear strength and internal friction Angle of rock mass. Compared with laboratory test and theoretical analysis, in-situ test can maintain the essential state of rock mass to the maximum extent, and obtain multiple groups of test data conveniently and quickly. The pre drilling in situ rock mass shear measurement system is independently developed. The system is described from the aspects of shear principle, overall design, hardware design and software platform. The system can get the shear strength parameters of rock mass quickly and efficiently, and the linear correlation of test data is high.
Mechanical Property Analysis of a Deployable Tape-Spring Boom Using for Aerospace Structures
Authors: Wang Sicong , Sun Haizhen , Sun Lining 
Published: July 2024

AbstractDeployable coilable tape-spring booms have many advantages especially for use in space, such as light-weight, high folded-ratio and small storage volume. The boom’s folding and deploying process is accompanied with the large-scaled deformation of thin-walled materials, which may damage the boom on stress concentration points. For the sake of avoiding failures during coiling and deployment process, this paper aimed at acquiring the critical points on a boom which were vulnerable to be destroyed. Since the interactions of the boom’s infinitesimals were complicated, a numerical model was considered to be introduced. Meanwhile, the mechanical properties of the boom’s deployed state were also analyzed for a better design, and both the deploying and deployed behaviors were further analyzed through parametric study. The research of this paper will give more guidance on the design of tape-spring booms and the selection of the key parameters.
Hydraulic Characteristics of Undular Hydraulic Jumps Over Different Bed Roughness
Authors: Lan Xinyu , Zhang Jingmei , Wang Hang 
Published: July 2024

AbstractOccurrence of undular hydraulic jumps has impact on sediment transport and bank erosion in estuarine areas. The hydraulic properties vary when it forms on a rough bed, leading to modification of turbulent mixing processes. This paper reports on a study of undular hydraulic jumps generated with different types of bed roughness including smooth, rough rubber-matted and grated beds. The experiment was conducted with a flow rate of 241 m3/h using acoustic displacement meters (ADMs) and an acoustic Doppler velocimeter (ADV). The obtained results reveal a discernible descending order in the undulations of the first three waves: smooth, grated, and rough rubber mat. In instances where roughness deviates to either extreme—being excessively small or large—the undulation of the first three waves intensifies. Through both free surface wave and turbulent flow field evolution experiments, it was determined that the roughness of the bed primarily influences the first wave, exerting the most pronounced impact on the crest of the initial wave. As the wave progresses, this influence gradually diminishes. Therefore, this article further posits that heightened bed roughness corresponds to an increased fluctuation in velocity at the bottom of the first peak, resulting in a weakened impact of toe jump oscillation on the flow field. Consequently, this diminishes the likelihood of negative velocity occurrences.
Comparative Analysis of Vibration Characteristics Testing for Different Pumped Storage Power Station Plants
Authors: Wang Shengjun , Xu Lianghua , Xiao Wei , Liu Guoqing 
Published: July 2024

AbstractThe excitation force of the plant structural vibration of pumped storage power station mainly comes from hydraulic excitation, which is obviously related to the cascade combination formed by the number of runner blades and the number of movable guide vanes of the unit. The main frequency of the excitation force is closely related to the minimum pitch diameter number of the unit. The analysis of the vibration test data of the typical pumped storage power station plants showed that the structural vibration spectrum caused by the cascade combination unit with the minimum pitch diameter number equaled 1 or 2, generally manifests as a single main frequency and a large vibration amplitude of the plant. While, the structural vibration spectrum caused by the cascade combination unit with the minimum pitch diameter number equaled 4 is relatively dispersed, and the vibration amplitude of the plant is relatively low. The above research indicates that the vibration amplitude of the plant has a significant decrease by using the cascade combination unit with the minimum pitch diameter number equaled 4, which is very beneficial for the vibration reduction of the plant.
Stability Analysis of Tailrace Outlet Slope at Right Bank of Kala Hydropower Station
Authors: Pan Bing , Hu Shuhong , Wu Weiwei , Cheng Yongjin , Jiang Zhen 
Published: July 2024

AbstractThe tailrace outlet slope located on the right bank of the Kala hydropower station represents a typical bedding slope characterized by a moderate to large dip angle. The excavation at the toe of the slope create favourable conditions for rock mass deformation and failure. In order to evaluate the slope’s stability, a thorough investigation and analysis of the engineering geological conditions are conducted. Additionally, the stress-strain characteristics resulting from the slope excavation are simulated utilizing the discrete element software 3DEC. Finally, the strength reduction method is used to evaluate the safety factor of the slope. The research results show that the stability of the slope is notably influenced by the presence of medium and large dip structural planes, the cutting excavation at slope toe can lead to deformation and localized block instability. The implementation of the system pre-stressed cables effectively increases the safety factor of the slope and ensures the stability of the tailrace outlet slope. These findings will provide valuable references for the design of similar rock slopes.
Hydrogeology-Induced Retrogressive Slope Toe Failure Initiation: A Coupled Physical and Numerical Modeling Approach
Authors: Gidday Biruk Gissila , Gidday Bisrat Gissila 
Published: July 2024

AbstractThe conceptual premise of the current study is that the chronological effect of geologic parameters and hydrologic variation has been enhancing the toe slope since then, and hence the natural slope has remained stable. To capture the phenomenon, in addition to an intensive literature review and the subsequent findings and rationales, comprehensive laboratory testing, physical flume experiments, and numerical modeling were performed. The flume experiments were extensively instrumented (pore pressure transducers, suction sensors, strain transducers, and tracer chemicals) to observe the retrogressive failure mechanism. The results show that the abrupt change in slope toe stress caused by an increase in slope angle, rise in pore water pressure, and dissipation of soil suction were responsible for radical change in strain and sudden failure. Findings show that the slope toe section was the spot of failure initiation and was subjected to sudden failure associated with accelerated retrogressions. Physical flume assessment and numerical simulations both show that modifying the slope toe could increase overall slope stability. Hence, slope toe contributes far more to slope stability than previously thought. Even though the soil type range and slope angle at which the retrogressive failure occurs remain a source of considerable ambiguity, proper slope toe treatment can be regarded as a critical remedy measure.
The Effect of Glass Fiber on the Notched Izod Impact Strength of Polybutylene Terephthalate/Glass Fiber Blends’
Authors: Khanh Luong Quoc , Phuc Tran Hoang , Quang Nguyen Dinh , Nga Pham Thi Hong , Anh Pham Quan , Tan Nguyen Thanh , Nu Ho Thi My 
Published: July 2024

AbstractImproving the fire resistance of polymer and construction materials is an urgent requirement today. This article aims to study the incorporation of Polybutylene terephthalate (PBT), a versatile polymer used in most glass fiber (GF) combination fields, to study their fire resistance and impact resistance for manufacturing battery housings. We conducted injection molding and scanning electrode microscopy (SEM) and had the expected results. The impact strength of PBT/GF samples measured according to ASTM D256 is 4.69, 4.43, 3.71, 4.67, and 6.28 kJ/m2. The PBT/25% GF sample achieved the highest average impact range of 6.28 kJ/m2. The suitable GF content in the mixture is from 20–30%. Combined with SEM microstructure, it was found that the content and density of GF distribution have a positive effect on the mixture, making the bond between them remarkably tight and robust. Thanks to the property of GF, which is non-flammable, it makes the material more effective fire resistant. This research is the basis for scientific developments that help solve the problem of impact resistance of this new plastic in production and is a premise for other research purposes in the future.
Analysis of the Inclined Impact Resistance Characteristics of Concrete Structures Against Projectiles
Authors: Xu Xiangyu , Wu Yingxiang , Jia Yifan , Gan Songping 
Published: July 2024

AbstractThe research involved the use of commonly utilized concrete materials as the target plate, with a specially designed 76 mm projectile intended to impact the concrete structure at a specific angle. The goal was to conduct numerical simulation research on the deflection of the projectile under oblique impact conditions and analyze the concrete structure’s ability to resist penetration under such conditions. Through numerical simulation calculations, various aspects of the oblique impact were studied, including ricochet patterns under different projectile velocities and angles of incidence, as well as the resulting damage to both the projectile and the target plate, penetration depth, and deflection angle of the projectile. The findings showed that, compared to vertical penetration, the concrete structure exhibited superior deflection and cover-plate effectiveness under oblique impact conditions. The ricochet patterns observed could potentially inform the design of concrete anti-ballistic structures.
Experimental Study on the Effect of Mixing Time on the Performance of High Strength Concrete
Authors: Ma Xiangwei , Zhu Xiuzhi , Zeng Junjie , Zhao Shangchuan , Liu Longlong 
Published: July 2024

AbstractTo solve the problem of concrete quality caused by non-standard mixing time of high-strength concrete and improve the durability life of concrete structures, based on the working performance and mechanical properties of concrete, effect of mixing time on the workability and strength was studied. In this paper, for high-strength concrete with water-binder ratios of 0.31 and 0.38, the mixing time was 120 s, 160 s, 180 s and 240 s. The effects of different mixing times on the fluidity, cohesion and water retention of high-strength concrete and the compressive strength of 28 days were studied. The test results show that the appropriate mixing time benefits the working performance of concrete and the development of concrete strength. Based on the workability and mechanical properties of concrete, the mixing time of concrete with a water-binder ratio of 0.38 is 160 s, and the mixing time of concrete with a water-binder ratio of 0.31 is 180 s. To ensure the excellent uniformity, compactness, workability and mechanical properties of concrete, the mixing time should consider the slump and the water-binder ratio of concrete. For concrete with a water-binder ratio of 0.31 to 0.38, the mixing time can change from 180 to 160 s.
Reimagining Household Cooking: A Critical Assessment of Improved Cookstoves Implementation for Sustainable Development
Authors: Kaneriya Yejashva , Dohare Devendra , Khatib Milad 
Published: July 2024

AbstractFood is one of the most important components for the survival of humans. Women suffer the most impacts of the cooking harmful gases and particulate matters that are 2.5 microns (PM2.5) or less such as PM10. Improved cookstoves are used to reduce firewood consumption, lower the smoke released from the kitchen, help women improve their health, and conserve native trees in the area. Sustainably managed biomass, unlike the burning of fossil fuels, is considered carbon neutral since it does not contribute to the overall carbon emissions in the atmosphere. In 2015, the United Nation mentioned 17 Sustainable Development Goals (SDGs) to be achieved by 2030. This research aims to assess an improvement in the cookstove implementation level within the clean development, by reducing the carbon emissions following the Indian perspective for the program of better cookstoves.
Design and Application of Multidimensional Monitoring and Early Warning System for Tunnel Safety
Authors: Jiang Hongliang , Lu Chaobo , Yang Tingwei , Xiong Chunfa 
Published: July 2024

AbstractThe tunnel project has a large one-time investment, a long construction period, and potential safety hazards. During the operation period, structural cracks, voids, deformation, dislocation, water leakage and other diseases may occur, which greatly reduces the use function of the tunnel and threatens its safety in construction and operation. Therefore, it is necessary to carry out the development and research of tunnel safety monitoring and early warning system to pre-perceive and predict the working state and disease characteristics of the tunnel structure and timely warn. Aiming at the working state and disease characteristics of the tunnel, this paper discusses how to obtain the dynamic changes of the working state and disease characteristics of the key parts of the tunnel in real time, and optimizes the design of the tunnel safety monitoring and early warning system. A multi-dimensional monitoring and early warning system for tunnel safety is recommended, which can control the working state and disease changes of the tunnel in real time, and improve the service quality and service life of the tunnel.
Research on Prefabricated Building Wall Technology Based on SAR Theory
Authors: Liu Jinwei , Li Qiuna 
Published: July 2024

AbstractThe article introduces the origin of SAR theory and its important guiding role in the research of prefabricated building technology. Based on SAR theory, this paper found that skeleton safety is fundamental in various technologies of prefabricated buildings, and the diversity, functionality, and sustainability of separable components, including wall systems, are the main research directions for future prefabricated building technologies in China. In this paper, the research on prefabricated building wall technology is conducted from the following aspects: Prefabricated building wall support system technology; prefabricated building exterior wall panel technology; Diversity of prefabricated building exterior walls.
Development Situation of Assembly Building in Chongqing
Authors: Liang Qiushuang , Yang Haiyan , Liang Qiujin 
Published: July 2024

AbstractIn recent years, various relevant national policies have been clearly proposed to vigorously develop assembled buildings, taking the development of assembled buildings as an important development strategy in China, and as one of the important directions for the rapid development of building structures. Chongqing Municipality also closely follow the national policy to respond to the call to take various measures to promote the development of local assembly building, this paper describes the concept and characteristics of assembly building, from the policy, data, technology and other support systems to analyze the current situation of the development of assembly building in Chongqing Municipality, the introduction of Chongqing Municipality, part of the typical assembly structure, the actual engineering application case study.