bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research and Application of Ultra High Performance Concrete in Engineering Projects in Japan
Authors: Zhou Jian 
Published: May 2023

AbstractJapan is located in the international seismic zone, and is also a resource intensive country. It has unique features in the research and application of ultra-high performance concrete materials. The paper analyzes and summarizes the engineering application cases of concrete strength grade above 150 N/mm2, including structural system, mix design, production process, strength grade, etc. Silica fume composite cement, with strict calculation of sand and stone gradation, improves the compactness beyond the conventional concrete; The super high performance water reducing agent can greatly reduce the water cement ratio and improve the working performance, especially the expansion degree; Organic fiber and steel fiber are especially important in fire resistance, explosion resistance and ductility. Ultra-high performance concrete could improve the seismic performance of building structures and the utilization rate of building area, and new materials could provide more choices for design and engineering application.
Experiment and Engineering Application Study on the Compression Properties of Foundation Soil in the Process of Reinforcing Existing Buildings with Composite Piled Foundation
Authors: Tang Qiufeng , Tong Jianxing , Jia Ning , Zhou Shengbin 
Published: May 2023

AbstractWhen an existing building has excessive settlement and has no convergence tendency due to foundation problems, the composite piled foundation is often used to partially underpin the upper load. However, considering that the compression properties of the foundation soil have changed greatly, the compressibility index provided by the initial survey report is no longer suitable for calculating the settlement of the reinforced foundation. In this paper, a consolidation test is designed to simulate the compression state of the foundation soil in the process of building construction, reinforcement, and settlement stability. The test results show that the recompression modulus Ers of the soil sample is 2.5–3.5 times the compression modulus Es1-2. In the engineering example, the recompression modulus is used to calculate the settlement of the reinforced foundation according to the settlement calculation method of the composite foundation with settlement-reducing piles, and the results are close to the actual settlement. In actual engineering, in the absence of supplementary survey, it is recommended to obtain the recompression modulus Ers through simulated test or use 2.5–3.5 times the compression modulus Es1-2 to calculate the settlement of the reinforced foundation.
Study on Comprehensive Detection and Treatment Measures of Qinlan Tunnel of Tianba Expressway Crossing Large Karst Cave
Authors: Wang Xiaoming , Zhou Yongxing , Zhang Gang , Chen Xueqi , Liu Zhiqiang , He Xiaoyong 
Published: May 2023

AbstractAiming at the problem of comprehensive detection technology and treatment measures for tunnels crossing large karst caves, this paper systematically carried out the research on advanced detection of karst geology and treatment measures of karst caves in combination with the Qinlan Tunnel Project of Tianba Expressway in Guangxi. The comprehensive detection method of “karst geological survey + geological radar detection + advanced horizontal drilling + three-dimensional laser scanning + geological sketch” is used for advanced detection. On the basis of ascertaining the spatial location and development scale of karst caves, the scheme of tunnel excavation after advanced reinforcement and support treatment such as advanced small pipe grouting is determined. It has been successfully applied to the construction practice of Qinlan Tunnel crossing ZK89+110 large karst caves, and the treatment measures of “root pile + lining strengthening” are put forward. It effectively avoids the occurrence of disasters caused by karst caves, and has important reference significance for similar projects.
Analysis on the Modeling of Rockbusrt Prediction in Deep Tunnels Based on Machine Learning
Authors: Zhang Yong , Liu Haijun , Ma Yueyuan , Chen Xueqi , Li Weinan , Huang Zheng 
Published: May 2023

AbstractDeep tunnels will face complex mechanical behavior problems of rock mass during construction and operation, among which the rockburst disaster is particularly prominent. Therefore, how to scientifically predict the rockburst activities of deep tunnels has become an urgent problem to be solved. According to the three aspects of energy conditions, lithology conditions and stress intensity that rockburst must meet, the strain energy storage coefficient (Wet), stress concentration factor (SCF) and brittleness index of rock mass (σc/σt) are selected as the discrimination indexes. On this basis, combining with the method of cluster analysis, some abnormal data are removed and a case database is constructed. Aiming at the defects of traditional prediction methods, this paper proposes a support vector machine method to establish the rockburst prediction model. According to the prediction model proposed in this paper to predict the rockburst situation of several deep tunnel engineering in China. The results show that the tunnel rockburst prediction model based on support vector machine is well consistent with the actual situation, indicating that the model has strong feasibility in practical application.
Application Practice of 3D Integration of Pipeline Information in Large-Scale and Complex Project Sites-Take Changsha Airport Addition and Alteration Project as an Example
Authors: Jiang Cheng , Dai Xiaogang , Huang Yinqiang , Li Jinlei 
Published: May 2023

AbstractBased on the practice of Changsha Airport Addition and Alteration Project, this paper refines, studies and summarizes the type, integration and interaction of pipeline information in large-scale and complex project sites, According to the whole life cycle of the Project, four types of pipeline information, including self-owned attribute, system attribute, management attribute and additive attribute, are sorted out. In actual engineering projects, there are two modeling ways, Method I: direct BIM design modeling, Method II: transformation and modeling after CAD design. The difference between Method I and Method II mainly sits on the difference in presentation form. One is three-dimensional and the other is two-dimensional. However, the base of both of them representing pipeline information is attributes and data. As long as these attributes and data can be extracted, information integration can be realized and applied to project management in the later stage. Based on the integrated research on the airport pipeline information, a corresponding BIM collaboration and management and control platform has been developed for the Project, and research results have been applied to the actual management of the project pipeline in an exploratory way, so as to achieve the project management requirements of the airport pipeline in terms of design, progress, cost, prefabrication and processing, and prepare for the later digital delivery and intelligent operation and maintenance management.
Numerical Simulation of Seismic Liquefaction for Treasure Island Site
Authors: Lu Hua , Lin Ziyun , Zhan Xudong , Yang Yanxin , Wu Di 
Published: May 2023

AbstractBy conducting numerical simulations of Treasure Island site in 1989 Loma Prieta earthquake, the Hilbert-Huang transform was used to study soil liquefaction. The UBC3D-PLM constitutive model was used to simulate the dynamic behavior of sand, the non-liquefied soil was simulated by Hardening Small Strain model, and the seismic information recorded in the PEER database was used for deconvolution analysis by one-dimensional equivalent linear analysis method, and the within motion was applied. Rayleigh damping is used in the numerical simulation process, and the damping ratio is 5%. Based on the Hilbert-Huang transform analysis, it is concluded that the UBC3D-PLM constitutive model can effectively simulate the dynamic behavior of soil. The amplification of the peak acceleration was from the bottom of Sandy fill to the ground surface, and the low-frequency content was shifted due to liquefaction in the process of transmission to the surface, and the high-frequency content was identified at the surface.
Analysis of Mode and Response Spectrum of an OBS Anti-trawl Sinking Coupling Frame Based on ANSYS Workbench
Authors: Zong Le , Yu Kaiben , Zhao Yuexia , Yu Shengqi , Zhao Lichuan , Ran Jun , Yang Zhiguo , Liu Baohua 
Published: May 2023

AbstractThree-dimensional solid modeling of an OBS anti-trawl sinking coupling frame was carried out using the ANSYS, and modal simulation analysis of the overall structure of the anti-trawl sinking coupling frame was made through the ANSYS Workbench. The natural frequencies and mode shape contour diagrams of the first six modes were extracted. The displacement response spectrum was analyzed, and the equivalent stress and directional displacement contour diagrams were obtained. Simulation results show that the natural frequency of the anti-trawl sinking coupling frame evades the working frequency band of the OBS, which verifies the effectiveness of the anti-trawl structure design.
Force Analysis of Anti-slip Pile Bodies on Soil Mudstone Slopes Under Heavy Rainfall
Authors: Liu Xiaobin 
Published: May 2023

AbstractThe soil mudstone slope anti-slip piles are used as the object of study to analyse the pile forces under the action of heavy rainfall. Introduction to the project, description of the general topographic elevation of the area; extraction of seepage potential energy from soil mudstone, calculation of rainfall and rainfall infiltration, assumption of vertical wall backs and horizontal fill behind the wall, calculation of lateral pressure on the rock supported by anti-slip piles, analysis of its damage mode according to the morphology of the bedrock surface and the conditions of the rock outwash structural surface, and calculation of slope stability under the action of strong rainfall. Analysis of the results: setting the length of the anti-slip piles at 15.5–17.5 m is most reasonable under the effect of heavy rainfall.
Mechanical Properties and Micromechanism of Geopolymers to Replace Cement Stabilized Crushed Stone
Authors: Li Yongxiang , Yang Lijuan , Li Xiao , Li Yongfei , Zhang Qiang , Pang Shoude 
Published: May 2023

AbstractIn order to realize the resource utilization of solid waste, the principle of alkali excitation is used to prepare geopolymers with fly ash, mineral powder and wet carbide slag as the main materials to replace part of the cement as the cementing material for the pavement base. Geopolymer-stabilized crushed stone was prepared by compounding cement and aggregate with geopolymer, and the unconfined compression strength, indirect tensile strength, compression rebound modulus, scour resistance and microscopic X-ray diffraction (XRD) and scanning electron microscopy (SEM) tests were carried out to study the effect of the change of geopolymer content on the mechanical properties of geopolymer-stabilized crushed stone and its mechanism. The test results show that when adding 30% geopolymer, the mechanical properties similar to those of cement can be obtained to a certain extent. XRD and SEM analysis showed that the geopolymer provided appropriate amount of silico-alumina and calcareous components to form calcium silicate hydrate (C–S–H) and calcium silicate (aluminum) hydrate (C–(A) –S–H) condensation. The glue can form a dense structure and increase the strength of the mixture.
Non-planar corrections in orbifold/orientifold $$ \mathcal{N} $$ = 2 superconformal theories from localization
Authors: Beccaria M. , Korchemsky G. P. , Tseytlin A. A. 
Published: May 2023

Abstract
We study non-planar corrections in two special $$ \mathcal{N} $$
N
= 2 superconformal SU(N) gauge theories that are planar-equivalent to $$ \mathcal{N} $$
N
= 4 SYM theory: two-nodes quiver model with equal couplings and $$ \mathcal{N} $$
N
= 2 vector multiplet coupled to two hypermultiplets in rank-2 symmetric and antisymmetric representations. We focus on two observables in these theories that admit representation in terms of localization matrix model: free energy on 4-sphere and the expectation value of half-BPS circular Wilson loop. We extend the methods developed in arXiv:2207.11475 to derive a systematical expansion of non-planar corrections to these observables at strong ’t Hooft coupling constant λ. We show that the leading non- planar corrections are given by a power series in λ3/2/N2 with rational coefficients. Sending N and the coupling constant λ to infinity with λ3/2/N2 kept fixed corresponds to the familiar double scaling limit in matrix models. We find that in this limit the observables in the two models are related in a remarkably simple way: the free energies differ by the factor of 2, whereas the Wilson loop expectation values coincide. Surprisingly, these relations hold only at strong coupling, they are not valid in the weak coupling regime. We also discuss a dual string theory interpretation of the leading corrections to the free energy in the double scaling limit suggesting their relation to curvature corrections in type IIB string effective action.
Resurgence, conformal blocks, and the sum over geometries in quantum gravity
Authors: Benjamin Nathan , Collier Scott , Maloney Alexander , Meruliya Viraj 
Published: May 2023

Abstract
In two dimensional conformal field theories the limit of large central charge plays the role of a semi-classical limit. Certain universal observables, such as conformal blocks involving the exchange of the identity operator, can be expanded around this classical limit in powers of the central charge c. This expansion is an asymptotic series, so — via the same resurgence analysis familiar from quantum mechanics — necessitates the existence of non-perturbative effects. In the case of identity conformal blocks, these new effects have a simple interpretation: the CFT must possess new primary operators with dimension of order the central charge. This constrains the data of CFTs with large central charge in a way that is similar to (but distinct from) the conformal bootstrap. We study this phenomenon in three ways: numerically, analytically using Zamolodchikov’s recursion relations, and by considering non-unitary minimal models with large (negative) central charge. In the holographic dual to a CFT2, the expansion in powers of c is the perturbative loop expansion in powers of ћ. So our results imply that the graviton loop expansion is an asymptotic series, whose cure requires the inclusion of new saddle points in the gravitational path integral. In certain cases these saddle points have a simple interpretation: they are conical excesses, particle-like states with negative mass which are not in the physical spectrum but nevertheless appear as non-manifold saddle points that control the asymptotic behaviour of the loop expansion. This phenomenon also has an interpretation in SL(2, ℝ) Chern-Simons theory, where the non-perturbative effects are associated with the non-Teichmüller component of the moduli space of flat connections.
Orbit averaging coherent states: holographic three-point functions of AdS giant gravitons
Authors: Holguin Adolfo , Weng Wayne W. 
Published: May 2023

Abstract
We study correlation functions of two AdS giant gravitons in AdS5 × S5 and a BPS supergravity mode using holography. In the gauge theory these are described by BPS correlators of Schur polynomials of fully-symmetric representations and a single trace operator. We find full agreement between the semiclassical gravity and gauge theory computations at large N, for both diagonal and off-diagonal structure constants. Our analysis in $$ \mathcal{N} $$
N
= 4 SYM provides a simpler derivation to the results in the literature, and it can be readily generalized to operators describing bound states of AdS giant gravitons as well as bubbling geometries.
Feynman integral reduction using Gröbner bases
Authors: Barakat Mohamed , Brüser Robin , Fieker Claus , Huber Tobias , Piclum Jan 
Published: May 2023

Abstract
We investigate the reduction of Feynman integrals to master integrals using Gröbner bases in a rational double-shift algebra Y in which the integration-by-parts (IBP) relations form a left ideal. The problem of reducing a given family of integrals to master integrals can then be solved once and for all by computing the Gröbner basis of the left ideal formed by the IBP relations. We demonstrate this explicitly for several examples. We introduce so-called first-order normal-form IBP relations which we obtain by reducing the shift operators in Y modulo the Gröbner basis of the left ideal of IBP relations. For more complicated cases, where the Gröbner basis is computationally expensive, we develop an ansatz based on linear algebra over a function field to obtain the normal-form IBP relations.
Surface quality investigation in surfactant-based EDM of Inconel 617 using deep cryogenically treated electrodes
Authors: Ishfaq Kashif , Sana Muhammad , Waseem Muhammad Umair , Anwar Saqib , Alfaify Abdullah Yahia , Zia Abdul Wasy 
Published: May 2023

AbstractSurface quality governs the physical, mechanical, tribological, physio-chemical, and biological properties of materials. Considering the excellent mechanical characteristics of Inconel 617 and the nature of its intended applications, electric discharge machining is generally engaged. However, there is still a need to uplift the surface quality of machined parts to improve their working life and performance. Therefore, this study revealed the potential of deep cryogenically treated (DCT) electrodes under dielectrics modified with span and tween in the said context using a full factorial experimental design. Experimental findings are deeply investigated by employing 3D surface profilometry, scanning electron, and optical microscopy. Cryogenically treated electrode(s) have demonstrated a better surface quality in comparison to the non-treated electrodes, such as DCT Cu has provided a 25.5% lower roughness value than non-treated Cu. Referring to the role of additives, there exists a reduction of 32.5% in roughness when DCT brass is used instead of typical brass using a mixture of span-20 (S-20) and kerosene as a dielectric. The surface finish given by the cryogenically treated brass is 18.99% better when compared to the average value given by all cryogenically treated electrodes considered in this study. It has also been revealed that tween-based dielectrics gave 83% better surface finish than span-based dielectrics with DCT electrodes.
Price leadership, spying, and secret price changes: a Stackelberg game with imperfect commitment
Authors: Fan Cuihong , Jun Byoung Heon , Wolfstetter Elmar G. 
Published: May 2023

AbstractWe analyze price leadership in a Stackelberg game with incomplete information and imperfect commitment. Sequential play is induced by an information system, represented by a spy, that reports the price of one firm to its rival before the latter chooses its own price. However, the Stackelberg leader may secretly revise its price with some probability. Therefore, the spy’s message is only an imperfect signal. This gives rise to a complex signaling problem where both sender and receiver of messages have private information and the sender has a chance to take another action with some probability. We find partially separating and pooling equilibria that satisfy equilibrium refinements such as the intuitive criterion and support collusive outcomes.
Deep learning regressor model based on nigrosome MRI in Parkinson syndrome effectively predicts striatal dopamine transporter-SPECT uptake
Authors: Bae Yun Jung , Choi Byung Se , Kim Jong-Min , AI Walid Abdullah , Yun Ildong , Song Yoo Sung , Nam Yoonho , Cho Se Jin , Kim Jae Hyoung 
Published: May 2023

Abstract
Purpose
Nigrosome imaging using susceptibility-weighted
imaging (SWI) and dopamine transporter imaging using 123I-2β-carbomethoxy-3β-(4-iodophenyl)-N-(3-fluoropropyl)-nortropane (123I-FP-CIT) single-photon emission computerized tomography (SPECT) can evaluate Parkinsonism. Nigral hyperintensity from nigrosome-1 and striatal dopamine transporter uptake are reduced in Parkinsonism; however, quantification is only possible with SPECT. Here, we aimed to develop a deep-learning-based regressor model that can predict striatal 123I-FP-CIT uptake on nigrosome magnetic resonance imaging (MRI) as a biomarker for Parkinsonism.

Methods
Between February 2017 and December 2018, participants who underwent 3 T brain MRI including SWI and 123I-FP-CIT SPECT based on suspected Parkinsonism were included. Two neuroradiologists evaluated the nigral hyperintensity and annotated the centroids of nigrosome-1 structures. We used a convolutional neural network-based regression model to predict striatal specific binding ratios (SBRs) measured via SPECT using the cropped nigrosome images. The correlation between measured and predicted SBRs was evaluated.

Results
We included 367 participants (203 women (55.3%); age, 69.0 ± 9.2 [range, 39–88] years). Random data from 293 participants (80%) were used for training. In the test set (74 participants [20%]), the measured and predicted 123I-FP-CIT SBRs were significantly lower with the loss of nigral hyperintensity (2.31 ± 0.85 vs. 2.44 ± 0.90) than with intact nigral hyperintensity (4.16 ± 1.24 vs. 4.21 ± 1.35, P < 0.01). The sorted measured 123I-FP-CIT SBRs and the corresponding predicted values were significantly and positively correlated (ρc = 0.7443; 95% confidence interval, 0.6216–0.8314; P < 0.01).

Conclusion
A deep learning-based regressor model effectively predicted striatal 123I-FP-CIT SBRs based on nigrosome MRI with high correlation using manually-measured values, enabling nigrosome MRI as a biomarker for nigrostriatal dopaminergic degeneration in Parkinsonism.
Microbial Diversity and Activity of Biofilms from Geothermal Springs in Croatia
Authors: Kostešić Ema , Mitrović Maja , Kajan Katarina , Marković Tamara , Hausmann Bela , Orlić Sandi , Pjevac Petra 
Published: May 2023

AbstractHot spring biofilms are stable, highly complex microbial structures. They form at dynamic redox and light gradients and are composed of microorganisms adapted to the extreme temperatures and fluctuating geochemical conditions of geothermal environments. In Croatia, a large number of poorly investigated geothermal springs host biofilm communities. Here, we investigated the microbial community composition of biofilms collected over several seasons at 12 geothermal springs and wells. We found biofilm microbial communities to be temporally stable and highly dominated by Cyanobacteria in all but one high-temperature sampling site (Bizovac well). Of the physiochemical parameters recorded, temperature had the strongest influence on biofilm microbial community composition. Besides Cyanobacteria, the biofilms were mainly inhabited by Chloroflexota, Gammaproteobacteria, and Bacteroidota. In a series of incubations with Cyanobacteria-dominated biofilms from Tuhelj spring and Chloroflexota- and Pseudomonadota-dominated biofilms from Bizovac well, we stimulated either chemoorganotrophic or chemolithotrophic community members, to determine the fraction of microorganisms dependent on organic carbon (in situ predominantly produced via photosynthesis) versus energy derived from geochemical redox gradients (here simulated by addition of thiosulfate). We found surprisingly similar levels of activity in response to all substrates in these two distinct biofilm communities, and observed microbial community composition and hot spring geochemistry to be poor predictors of microbial activity in the study systems.