bluuebunny/crossref_metadata_2025 huggingface dataset:
Double side fiber laser welding: A novel welding technique to join thick plates
Authors: Subramaniyan M. K. , Pathinettampadian G. , Castro P. , Thanigainathan S.
Published: July 2024

Stainless steel grade 304, is one of the most utilized grades of stainless steel and it is chosen for its corrosion resistance. The ideal option is 304, since its lower carbon content lowers intergranular corrosion, especially if corrosion resistance is a top goal for a project. This research work investigates the mechanical and microstructural characteristics of a novel double side fiber laser welded stainless steel 304 plates. Double side fiber laser welding technique is used to fabricate a butt joint with plates of thickness 5 mm. With a laser frequency of 25 Hz, speed of 6 mm ⋅ s−1, and a heat input of 1.4 kW in terms of power is applied to the joint, resulting in a maximum depth of penetration of 2.7 mm. The same parameter is applied on both sides of the plate. The dendritic structures are observed through micrographs of weld and pure metal captured using an optical microscope. Experiments such as tensile, bend, microhardness and impact test have been conducted to ensure the quality of weldment. The weldment consists of austenite and δ‐ferrite. X‐ray diffraction reveal presence of both austenite and ferrite in the weldment. Ductile mode of fracture occurred during failure of tensile samples.
Impact toughness and wear resistance of different equivalent ratios of 316 L and 2Cr13 by laser melting deposition on Q235 steel
Authors: Zhao Y. , Huang C. , Chen X. , Liu H. , Huang M. , Yuan Y. , Zhong J. , Zhang Y. , Xiong J. , Yang D.
Published: July 2024

This paper systematically studies cladding materials prepared by mixing 316 L and 2Cr13 alloy powders in different ratios. The powder was melted and deposited on a Q235B carbon steel substrate using laser melting deposition with a high Ni transition layer and appropriate laser process parameters. Bimetallic plates with a thickness of 10 mm ±0.5 mm was prepared. The microstructure of different parts of the bimetallic plates and the impact toughness and hardness were observed and tested under different alloy ratios. The results indicate that the Nickel‐Chromium equivalence ratio increased, the hardness and wear resistance of the bimetallic plates increased, and the degree of eutectic segregation in the eutectic structure also increased. When the ratio of 2Cr13 reached 60 %, the impact toughness increased significantly, and the needle‐like second phase appeared in the structure. X‐ray diffractometer analysis determined that this second phase was (Fe, Cr)7C3. After Charpy impact testing, the fracture microstructure showed many dimples, indicating micropore aggregation fracture. This study guides preparing large‐thickness cladding layers on iron and steel parts using laser melting deposition.
Divisionalization in vertical structures
Authors: Bru Lluís , Fauli‐Oller Ramon , Ordóñez‐de‐Haro José‐Manuel
Published: July 2024

We evaluate the incentives to create within‐industry independent divisions once the vertical structure of the industry is considered. Divisionalization allows a firm to gain market share in the final market, but it also leads to an increase in total payments to the input supplier. The less competitive the upstream market, the more important the second effect will be, and this reduces the profitability of divisionalization. As a consequence, a less competitive upstream segment leads to a lower total number of divisions in equilibrium and a less competitive final market, harming end consumers who will face higher prices.
Polymer nanotherapeutics: A promising approach toward microglial inhibition in neurodegenerative diseases
Authors: Keshavarz Shahbaz Sanaz , Koushki Khadije , Keshavarz Hedayati Samaneh , McCloskey Alice P. , Kesharwani Prashant , Naderi Yazdan , Sahebkar Amirhossein
Published: July 2024

Nanoparticles (NPs) that target multiple transport mechanisms facilitate targeted delivery of active therapeutic agents to the central nervous system (CNS) and improve therapeutic transport and efficacy across the blood‐brain barrier (BBB). CNS nanotherapeutics mostly target neurons and endothelial cells, however, microglial immune cells are the first line of defense against neuronal damage and brain infections. Through triggering release of inflammatory cytokines, chemokines and proteases, microglia can however precipitate neurological damage—a significant factor in neurodegenerative diseases. Thus, microglial inhibitory agents are attracting much attention among those researching and developing novel treatments for neurodegenerative disorders. The most established inhibitors of microglia investigated to date are resveratrol, curcumin, quercetin, and minocycline. Thus, there is great interest in developing novel agents that can bypass or easily cross the BBB. One such approach is the use of modified‐nanocarriers as, or for, delivery of, therapeutic agents to the brain and wider CNS. For microglial inhibition, polymeric NPs are the preferred vehicles for choice. Here, we summarize the immunologic and neuroinflammatory role of microglia, established microglia inhibitor agents, challenges of CNS drug delivery, and the nanotherapeutics explored for microglia inhibition to date. We also discuss applications of the currently considered “most useful” polymeric NPs for microglial‐inhibitor drug delivery in CNS‐related diseases.
Containment control analysis of delayed nonlinear fractional‐order multi‐agent systems
Authors: Pang Denghao , Liu Song , Zhao Xiao‐Wen
Published: July 2024

This paper considers containment control (CC) of delayed nonlinear fractional‐order multi‐agent systems (FMASs). A reliable and effective method is proposed to deal with the difficulties brought from fractional calculus and delays. Utilizing improved Razumikhin method, algebraic graph theory, and matrix analysis technique, several simple algebraic conditions are provided to solve CC by choosing nondelayed or delayed communication protocols, respectively. Numerical results are also offered to clarify the efficiency of our theoretical method.
Developing a transdiagnostic Ecological Momentary Assessment protocol for psychopathology
Authors: Jover Martínez Alberto , Lemmens Lotte H. J. M. , Fried Eiko I. , Roefs Anne
Published: July 2024

Objectives

The network approach to psychopathology posits that mental disorders emerge from dynamic interactions among psychopathology‐relevant variables. Ecological Momentary Assessment (EMA) is frequently used to assess these variables in daily life. Considering the transdiagnostic nature of the network approach to psychopathology, this study describes the development of a transdiagnostic EMA protocol for psychopathology.

Methods

First, 96 clinicians completed an online survey, providing three EMA constructs for up to three disorders they specialize in, and three EMA constructs relevant across disorders (transdiagnostic constructs). Second, 12 focus groups were conducted with clinical experts for specific types of diagnoses (e.g., mood disorders, anxiety disorders). Finally, a selection of items was reached by consensus. Two raters independently coded the online survey responses with an inter‐rater agreement of 87.3%.

Results

Jaccard indices showed up to 52.6% overlap in EMA items across types of diagnoses. The most frequently reported transdiagnostic constructs were mood, sleep quality, and stress. A final set of EMA items is created based on items' frequency and informativeness, ensuring completeness across diagnoses and minimizing burden.

Conclusions

The described procedure resulted in a feasible EMA protocol to examine psychopathology transdiagnostically. Feasibility was helped by the overlap in mentioned symptoms across disorders. Such overlap raises questions about the validity of DSM categories.
Stable numerics for finite‐strain elasticity
Authors: Shakeri Rezgar , Ghaffari Leila , Thompson Jeremy L. , Brown Jed
Published: July 2024

A backward stable numerical calculation of a function with condition number will have a relative accuracy of . Standard formulations and software implementations of finite‐strain elastic materials models make use of the deformation gradient and Cauchy‐Green tensors. These formulations are not numerically stable, leading to loss of several digits of accuracy when used in the small strain regime, and often precluding the use of single precision floating point arithmetic. We trace the source of this instability to specific points of numerical cancellation, interpretable as ill‐conditioned steps. We show how to compute various strain measures in a stable way and how to transform common constitutive models to their stable representations, formulated in either initial or current configuration. The stable formulations all provide accuracy of order . In many cases, the stable formulations have elegant representations in terms of appropriate strain measures and offer geometric intuition that is lacking in their standard representation. We show that algorithmic differentiation can stably compute stresses so long as the strain energy is expressed stably, and give principles for stable computation that can be applied to inelastic materials.
A novel overflow extrusion‐annealing process for preparing high performance recycled carbon fiber reinforced Nylon 6 composites
Authors: Cheng Huanbo , Tang Mingxi , Guo Lijun , Feng Zihao , Qian Zhengchun , Wang Qingze , Zhai He
Published: July 2024

The recycled carbon fiber reinforced polymer (rCFRP) based on fused filament fabrication possesses many problems, such as high porosity and poor interlayer bonding. In view of this, an overflow extrusion‐annealing process is proposed in this paper, in which rCFRP is prepared by using the extrusion flow higher than the theoretical requirement, and then annealed. Experimental outcomes demonstrate that recycled carbon fiber reinforced Nylon 6 (rCF/PA6) composites with a carbon fiber content of 35.5 wt% were successfully prepared by a developed screw extrusion 3D printer. The pore size distribution and micromorphology of rCF/PA6 composites show that the process can eliminate the inter‐bead pores, reduce the total porosity, and effectively promotes the interline and interlayer bonding. Mechanical properties tests reveal that compared with pure PA6, the tensile strength of rCF/PA6 composites prepared by this process is increased by 87.4% (100.41 MPa), and the flexural strength is increased by 71% (150.5 MPa). Therefore, this process has great potential in the preparation of high‐performance rCFRP, and is expected to provide a new perspective for the industrial application of 3D printed rCFRP in the future.

Highlights

Utilize recycled carbon fiber (rCF) in screw extrusion 3D printing.

Prepare rCF/PA6 composites with a high rCF content.

Eliminate inter‐bead pores based on overflow extrusion.

Enhance interline and interlayer bonding of composites based on annealing.
Improving supercooled liquid water representation in the microphysical scheme ICE3
Authors: Dupont Rémi , Taymans Claire , Vié Benoît
Published: July 2024

Most numerical weather prediction (NWP) models have a significant bias in predicting supercooled liquid water (SLW). For this reason, icing risk diagnostic tools do not use supercooled liquid water forecast by the models as an input parameter, but rather temperature and humidity, which are forecast better than SLW. The main objective of this study is to improve the SLW representation in the microphysical scheme ICE3 (Three Ice categories) used in the operational Applications de la Recherche à l'Opérationnel à Méso‐Echelle (AROME) model. For this purpose, several parametrizations of the microphysical processes were evaluated to find a better representation of SLW in the Mesoscale Non‐Hydrostatic model (MESO‐NH), which also uses ICE3. Elements of the microphysical scheme of the HARMONIE‐AROME model and work carried out by the Centre National de Recherches Météorologiques (CNRM) have been tested and compared with the current scheme. After a preliminary study, three parametrizations of the microphysical scheme were selected, in which the processes of ice initiation, snow and graupel collection of cloud droplets, condensation, Bergeron–Findeisen, and saturation adjustment were modified. Then, MESO‐NH simulations were performed and compared with observations from the In‐Cloud ICing and Large‐drop Experiment (ICICLE) airborne campaign. Three case studies were used with different icing weather conditions such as freezing rain, freezing drizzle, lake effect, etc. The results show a better representation of SLW with a greater presence of cloud droplets for colder temperatures up to 30 C. However, the liquid water content remains underestimated and the ice mass is overestimated. The ice initiation and cloud droplet collection by snow and graupel play a major role in the SLW representation. Parametrizations with restrictive ice initiation criteria reduce cloud droplet consumption and provide better agreement with observations. The results are promising and need to be investigated further with more cases and in the operational model AROME.
A rare occurrence of paragonimiasis accompanied by cryptococcal pneumonia
Authors: Lee Hwan Jin , Park Jun Hyung , Ahn Ae Ri , Jeong Jae Seok , Lee Yong Chul
Published: July 2024

Key message

Pulmonary paragonimiasis may be accompanied by a rare infectious disease, such as cryptococcal pneumonia. To our knowledge, this is the first case ever reported in the English literature.
Ultrahigh Potassium Storage Capacity of Ca2Si Monolayer with Orderly Multilayered Growth Mechanism
Authors: Fang Zhiyu , Jiang Jiaxin , Guo Hongyan , Lin Xiangsong , Wu Xiaojun , Zhuo Zhiwen , Lu Ning
Published: July 2024

As the rising renewable energy demands and lithium scarcity, developing high‐capacity anode materials to improve the energy density of potassium‐based batteries (PBBs) is increasingly crucial. In this work, a unique orderly multilayered growth (OMLG) mechanism on a 2D‐Ca2Si monolayer is theoretically demonstrated for potassium storage by first‐principles calculations. The global‐energy‐minimum Ca2Si monolayer is a semiconductor with isotropic mechanical properties and remarkable electrochemical properties, such as a low potassium ion migration energy barrier of 0.07 eV and a low open circuit voltage ranging from 0.224 to 0.003 V. Most notably, 2D‐Ca2Si demonstrates an ultrahigh theoretical specific capacity of 5459 mAh g−1 and a total specific capacity of 610 mAh g−1, reaching up to 89% of the capacity of a potassium metal anode. Remarkably, the OMLG mechanism facilitates stable, dendrite‐free deposition of hcp‐K metal layers on the 2D‐Ca2Si surface, where the ultrahigh and gradually converging lattice match as the layers increase is the key to achieving theoretically near‐infinite growth. The study theoretically demonstrates the Ca2Si monolayer a highly promising anode material, and offers a novel potassium storage strategy for designing 2D anode materials with high specific capacity, rapid potassium‐ion migration, and good safety.
Tension Induced Photoluminescence Enhancement in an Organic Single Crystal
Authors: Wang Chunjiao , Zhang Tao , Zhang Lan , Wang Junhui , Ge Maowen , Hu Yidan , Huang Jingwei , Mei Le , Wang Tao , Chen Xian‐Kai , Du Wei
Published: July 2024

Organic single crystals possess distinct advantages due to their highly ordered molecular structures, resulting in improved stability, enhanced carrier mobility, and superior optical characteristics. However, their mechanical rigidity and brittleness impede the applications in flexible and wearable optoelectronic devices. Here, photoluminescence (PL) emission from 2,6‐diphenylanthracene (DPA) single crystals is studied under tensile strain, which shows PL enhancement by more than two times with a strain of ≈1.42%. Such a tension induced PL enhancement is reversible, exhibiting no clear optical degradations during 100 cycles of bending and recovery processes. Theoretical calculations reveal that the deformation of molecular structure under strain induces a decrease of the dihedral between anthracene and benzene moieties in DPA molecules. Further, the increased molecular conjugation enhances the molecular oscillator strength, leading to the brightened PL emission. Meanwhile, with the decreased dihedral, the molecular vibrations in DPA crystals are suppressed, which can reduce the non‐radiative decay rate. In contrast, no tension induced PL enhancement is observed in polycrystalline DPA thin films as the strain can be released via the grain boundaries. This study highlights the superior optical performance of DPA single crystals under strain field, which will provide new possibilities for DPA‐based flexible devices.
Flexible Mesopores in Nanoscrolls: Extraordinarily Large Alteration of Pore Sizes and Their Reversibility
Authors: Asakura Yusuke , Leung Mandy H. M. , Yamauchi Yusuke
Published: July 2024

Flexible porous materials have gained considerable interest for their potential applications in selective absorption and controlled release/storage of specific molecules or compounds. Here, nanoscrolls are proposed as a type of inorganic solids with reversibly flexible mesopores. Nanoscrolls exhibit a rolled‐up structure composed of nanosheets with a 1D rod‐like morphology, possessing two distinct nanospaces. The first space comprises 1D tubular mesopores located at the center of the rod, while the second space exists in the interlayer regions on the wall of the mesopore, resulting from the layer stacking caused by the scrolling of nanosheets. By replacing the interlayer cations on the nanoscroll walls with other cations, a drastic alteration in the size of the 1D mesopores is observed. For instance, exchanging bulky dodecylammonium cations with small NH4+ cations leads to a substantial change in pore size, with differences ranging from 10 to 20 nm—a notably larger variation compared to previous reports on flexible porous materials. Importantly, the alteration of pore size induced by the exchange reaction is found to be reversible. This reversible alteration in pore size holds promise for applications in host–guest chemistry involving large moieties such as nanoparticles and enzymes.
Revival of Degraded CsPbI3 Nanocrystals by Diselenide Ligand and Nanocrystal Self‐Assembly on Nanofibrilar Ligand Template
Authors: Ghorai Arup , Das Avijit , Choi Yoonsun , Roy Baidyanath , Jeong Unyong
Published: July 2024

Among the lead halide perovskite (LHP) family, CsPbI3 is known to be significantly vulnerable to moisture, which hinders its use in real device applications. It is reported that chalcogen‐based ligands can better stabilize CsPbI3 and revive nanocrystals (NCs). Here, diphenyl diselenide (DPhDSe) ligand is used to revive the degraded CsPbI3 NCs through a post‐synthetic treatment of adding a small amount of DPhDSe in the degraded NC dispersion. DPhDSe in the dispersion formed nanofibrillar crystals at a low temperature through the π–π stacking of the phenyl ring. The nanofibrils played as a template on which the NCs self‐assembled and they are attached side‐by‐side to form microfibers. The microfiber powder containing the NCs is optically stable at ambient conditions and morphologically self‐healable by mild thermal annealing due to the dynamic Se─Se bond. The mechanism of the structural changes, optical transitions, and chemical changes has been systematically characterized through electron microscopy, diffraction, spectroscopy, and elemental analysis.
Hybrid Thin Film Encapsulation for Improving the Stability of PbS Quantum Dot Solar Cells
Authors: Wang Yiying , Wu Hao , Gao Haotian , Ren Qinyi , Ni Kun , Liu Shanfei , Ma Wanli , Wang Jianxiang , Liu Zeke , Liu Ruiyuan
Published: July 2024

The instability to moisture, heat, and ultraviolet (UV) light is the main problem in the application of quantum dot solar cells (QDSCs). Thin film encapsulation can effectively improve their operational stability. However, it is difficult to achieve multiple barrier effects with single layer of encapsulated film. Here, a hybrid thin‐film encapsulation strategy is reported to encapsulate lead sulfide QDSCs, which can isolate moisture and partial thermal, and prevent the penetration of UV light, thus retarding the surface oxidation process of the quantum dots. After 60 h, the encapsulated device retains a normalized power conversion efficiency of 83.8% and 80.6% at 85% humidity and 75 °C, respectively, which is three and six times of the value obtained in unencapsulated devices. At continuous UV illumination, encapsulated device exhibits five times higher stability than the reference. This strategy provides the way for the overall improvement of the operating stability of lead sulfide QDSCs in harsh environments of high humidity, high temperature, and UV light.
Revealing fundamental flexural behavior of reinforced concrete slabs using distributed fiber optic sensors
Authors: Yager Jacob , Bentz Evan C. , Woods Joshua E. , Hoult Neil A.
Published: July 2024

Distributed fiber optic sensors (DFOS) allow for the measurement of distributed strains on concrete surfaces and along steel reinforcement in reinforced concrete (RC) members, and these measurements can quantify reinforcement and concrete behavior. In this investigation, concrete surface and reinforcement strains from DFOS were used to quantify and compare the structural behavior of lightly and moderately reinforced one‐way slabs strips to better characterize localized strain behavior of lightly reinforced RC members with small diameter bars (10 M). By quantifying the entire compression region and reinforcement strain behavior, various structural parameters, such as curvature, strain profiles over the height at various locations, and neutral axis depth were calculated. From the distributed properties, it was determined that significant differences in behavior existed between moderately and lightly reinforced specimens with small diameter bars, with the lightly reinforced specimen displaying non‐uniform behavior along its length. Differences observed in the lightly reinforced member with small diameter bars include local curvature differences both at a crack and between cracks, local evidence of plane sections not remaining plane, possible different internal cracking mechanisms, amongst other local strain behavior differences, which could have implications for future modeling and design of lightly reinforced RC members with small diameter bars.
Experimental Study on Alfvén Instability in a Magneto‐Plasma Dynamic Arc‐Jet Collisional Finite‐β Plasma
Authors: Akitsu Tetsuya , Inutake Masaaki
Published: July 2024

Test plasma high‐density (TPH) was a research facility that started in the 1980s, generated high‐density plasma using magneto‐plasma‐dynamic (MPD) arc‐jet, , where is the ratio of the kinetic pressure divided by the magnetic field pressure. In this work, we aim to authenticate the method used in the identification of the current‐driven instability in high‐frequency mode as Alfvén instability, standing on the linear trend of the difference of the phase of the Fourier transforms of the magnetic field fluctuation. The dependence of the wavenumber‐versus‐frequency shows a linear regression, close to the Alfvén velocity expected from the plasma density, ion mass and the strength of the magnetic field. With short wave packets of the left‐hand, circularly polarized Alfvén waves were recorded for the spectral analysis and reconstructed the spatial changes in the phase spectrum. The dispersion in the frequency stretch was found to be traced as the Alfvén mode. Artifacts such as standing waves affect a narrow range of phase spectra and have large leverage as an error in the linear regression analysis. The coherence spectrum for the validation and the method of recovering data using maximum likelihood estimation will be presented. © 2024 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.
The Effect of Modified Styrene Butadiene Rubber Latex on the Properties of Emulsified Asphalt and Mixture
Authors: Zhou Qiwei , Shi Zhixin , Zheng Shilun , Zhao Mengzhen , Yuan Mingyuan , Xing Chunzhuang , Xu Fu
Published: July 2024

In order to study the effect of styrene butadiene rubber (SBR) latex at various dosages on the properties of emulsified asphalt and its mixtures as well as to reveal SBR’s modification mechanism and action, the conventional test, dynamic shear rheology test, fluorescence microscopy test, infrared spectroscopy test, contact angle test, wet wheel abrasion test and rutting deformation test were carried out to investigate the conventional properties, rheological properties, microphase structure, adhesive properties and the abrasion resistance of its mixtures, the resistance to water damage and rutting resistance of the modified SBR emulsified asphalt. The results show that SBR can make a significant improvement in ductility and softening point of emulsified asphalt with reduction in emulsified asphalt’s penetration. SBR emulsified asphalt complex shear modulus and rutting factor increases and the phase angle decreases with the dosage of SBR The spatial structure of SBR can be stabilized in the emulsified asphalt, the linear correlation coefficients between the SBR doping and its area share were found to be high by binarized fluorescence microscopy image analysis. The SBR can make improvement in the contact angle for emulsified asphalt and in free energy on emulsified asphalt’s surface. The physical modification between SBR and emulsified asphalt. And SBR features excellent road properties, such as abrasion resistance, water damage resistance and rutting resistance.
Inverse Filtration Problem of a Bidisperse Suspension
Authors: Kuzmina Liudmila I. , Osipov Yuri V.
Published: July 2024

Filtration problems of suspensions and colloids in porous media are considered when designing tunnels and underground structures. To strengthen weak soil, a liquid solution is injected into the rock, the particles of which are filtered in the pores and distributed far from the well. A deep bed filtration model of 2-particle suspension in a porous material is considered. The purpose of the work is to determine the model parameters from the measured outlet concentration of suspended particles. Using an explicit solution to the direct filtration problem on the concentration front, the inverse problem is reduced to a system of nonlinear algebraic equations, which is a special case of the moment problem. The system is solved by passing to a canonical basis in the space of symmetric polynomials. Conditions for the existence of a solution are obtained. An explicit solution is constructed. The inverse filtration problem of a suspension with particles of two types is solved, determining the initial partial concentrations and filtration coefficients.
Review on Impacts of Geometric Imperfections on Behavior of Cold-Formed Structural Members
Authors: Vu Quoc Anh , Pham Ngoc Hieu
Published: July 2024

Cold-formed structural members have been demonstrated to be highly sensitive to buckling modes due to their small thickness. Cold-formed sections have been identified to exhibit significant geometric imperfections which have been illustrated to significantly affect the stability and should be considered in structural analyses of such cold-formed structural members. Their effects were presented in a variety of previous investigations, but these obtained results were still discrete without general evaluations. Therefore, this paper will provide an overview on the impacts of various imperfection components on the behavior of cold-formed structural members. Subsequently, several previous investigations on structural behaviors of cold-rolled structural members were summarized and thoroughly analyzed to enhance understanding of the influence of each geometric imperfection component. It was found that sectional imperfection components should be considered in the analyses for short and intermediate structural members whereas global imperfection components should be included in the analysis of long structural members. Also, bucking behaviors of a structural member were governed by combinations of various imperfection components instead of any single component. These findings will be the base for future investigations of such members under the effects of geometric imperfections.
Research on the Application of Assembly Building in New Rural Construction Under the Background of Rural Revitalization
Authors: Zhang Bo , Liang Qiushuang , Liang Qiujin
Published: July 2024

The rural revitalization strategy adheres to the priority development of rural areas, the full scientific and rational use of natural landscape resources, the effective protection of the ecological environment and the governance and beautification of the rural living environment. The advantages of assembled buildings which are compatible with the concept of environmentally sustainable development, including pollution reduction, energy saving and carbon reduction, promote the development of the application of assembled buildings in the construction of new rural areas. This paper analyzes the advantages and disadvantages of assembly building and the current situation of new rural housing construction and carries out a theoretical research on assembly buildings applicable to the construction of new rural areas, so as to provide a theoretical and practical basis for the application of assembly buildings in the construction of new rural areas.
Application of Virtual Reality Technology in Parametric Design of Fabricated Shear Wall Structure
Authors: Zhou Fang , Sun Jingjing
Published: July 2024

This paper mainly analyzes the application of virtual reality technology in parametric design of fabricated concrete shear wall structure. It includes the overview of virtual reality technology, parametric model of fabricated shear wall structure based on virtual reality technology, parametric design strategy and parametric design development direction analysis. It is hoped that this analysis can provide some references for the application of virtual reality technology and the improvement of design quality of fabricated shear wall structure.
Experimental and Numerical Studies on Shear and Tensile Behavior of Horizontal Connecting Joints for Improved Precast Concrete Bearing Wall Structure
Authors: Yu Haian , Zhang Lei , Su Shuai , Huang Kun
Published: July 2024

An improved precast bearing wall structure was proposed, with light weight gauge steel members embedded in the wall, forming full length hole for dowels passing through, which can provide higher speed and lower cost construction method, especially for low rise buildings. The shear and tensile behavior of the horizontal joints for the novel precast bearing wall structure were studied through experimental and numerical investigation in this paper. Three identical specimens for horizontal joints shear and tensile tests separately were tested. The shear test specimens were designed from the wall-slab-wall connection part while the tensile test specimens were designed from the wall-foundation connection part. The whole experimental process from crack generation to joints failure was investigated in detail and the load-displacement curves were provided and analysed. Based on experimental results, the finite element models of both type specimens are verified and calibrated using ABAQUS. The shear and tensile failure mechanism of horizontal joints is presented and the recommendations to increasing the horizontal joints strength capacity and ductile performance are proposed, which may provide practical guidance for future engineering practice.
Application of Ultrasonic Nondestructive Testing Technology to the Horizontal Joint Slurry at the Bottom of Shear Wall
Authors: Li Langhua , Shen Duwen , Gan Qili
Published: July 2024

Ultrasonic nondestructive testing (NDT) technology has a wide range of applications in the connection nodes of prefabricated building components. It is mainly used to test the quality of the connection nodes of prefabricated building components, such as filling degree, anchorage of steel bars, etc. This paper mainly introduces the detection of the filling degree of the shear wall bottom joint slurry. By discriminating acoustic parameters such as “sound velocity, amplitude, waveform” in ultrasonic detection method, the fullness of grouting is detected. According to the examples, the operation steps such as field detection, data processing and analysis and entity excavation verification are summarized, and suggestions are provided for the efficient application of ultrasonic detection technology in the quality detection of fullness.
Research on the Influencing Factors of Migrant Workers’ Transformation into Industrial Workers Based on Intelligent Construction——Taking Chongqing as an Example
Authors: Cao YiFan , Wang Xu , Kou Yidan , Zhi Zixiang
Published: July 2024

A high-quality workforce in the construction industry promotes the development of construction industrialization and intelligent construction. However, there are some difficulties in transitioning from traditional construction workers to industrial workers. This study takes migrant workers in the construction industry in Chongqing as a sample, and conducts empirical research using methods such as literature review, questionnaire survey, SPSS factor analysis, and multiple linear regression analysis. Based on the main influencing factors, strategic suggestions are proposed for your reference.
Research on the Maturity of Intelligent Construction Management in the Whole Process of Prefabricated Buildings
Authors: Zhang Huili
Published: July 2024

Intelligent construction is an important means of industrialization in new construction, which can realize the whole process of prefabricated buildings, all-round information, integration, digitalization and intelligent management, and reshape the value chain and supply chain system of the construction industry. At present, the relevant research on prefabricated intelligent construction is relatively fragmented and independent, and there are few studies on the intelligent construction management of the whole process of prefabricated buildings. So it is difficult for us to accurately estimate the level of intelligent manufacturing capabilities of contractors in prefabricated buildings. Starting from prefabricated buildings and intelligent construction under the background of new-type building industrialization, this paper constructs the maturity model, maturity evaluation index and evaluation standard of the intelligent construction management of the whole process of prefabricated buildings. It is expected to be helpful for the evaluation and improvement of the level of intelligent construction management in the entire process of prefabricated buildings.
Research on the Removal Sequence of Arch Rib Assembly Supports for Concrete-Filled Steel Tubular Tied Arch Bridges
Authors: Peng Zhihui , Li Jiaqi
Published: July 2024

The main bridge of the Bayi Bridge project in Yangxin County is a concrete-filled steel tubular tied arch bridge with a calculated span of 127.04 m. The steel pipe arch ribs adopt a dumbbell-shaped cross-section, are manufactured in seven longitudinal sections, and are constructed using the support method. The tie beams are fully prestressed concrete structures. The design guidance plan is to remove the arch rib assembly bracket after completing the arch rib steel pipe concrete construction. Considering that during the construction process of steel pipe concrete top pressure injection, the arch rib assembly support bears a large load and has high safety risks, an optimization plan is proposed to remove the arch rib assembly support first after the steel pipe arch rib assembly is completed, and then top pressure injection of steel pipe concrete. To analyze the optimization effect, a finite element model was established using Midas Civil analysis software to analyze the stress of the two schemes. The results showed that the maximum stress of the steel pipe arch rib in the optimized scheme increased by 11.7 MPa, reaching 128.4 MPa, which is less than the material design strength; The compressive stress of the upper and lower chord concrete decreased by 1.8 MPa and 2.4 MPa respectively; The difference in arch rib deformation has little impact on the selection of the two schemes, and can be solved by setting pre camber; The tensioning of N2 and N7 prestressed steel tendons has little effect on the structural stress, and the optimized plan meets the stress requirements.
Design of the Prefabricated Building PC Component Visualisation Platform
Authors: Liao Guomin , Hu Jing
Published: July 2024

This paper adopts the Django framework and B/S architecture, uses the Web Browser as the client, and applies Pycharm compiler, Python programming language, and MySQL database to design a prefabricated building PC component visualization platform. According to the requirements of prefabricated building PC components, the overall structure of the platform is designed, which is divided into the data layer, the business layer, and the interface layer, mainly achieving 3D visualization of PC component, the data management, the alarm management, the information management, and the equipment maintenance functions. The prefabricated building PC component visualization platform combines data visualization and other technologies to govern visually the storage and management process of PC components, the lifting and installation management process of PC components, and the operation and maintenance management process of PC components.
Design Strategy and Application Research of Small Steel Structure Prefabricated Building
Authors: Du Yihui , Zhang Zijing , Hu Yuchao
Published: July 2024

Under the background of building industrialization, small steel structure prefabricated buildings can achieve quality improvement, efficiency improvement, technological upgrading, resource conservation, and environment friendly demand, so that low-rise houses can get rid of the public impression of cheap and low-tech. Combined with the common problems of small prefabricated buildings in southwest China, this paper sorts out four design strategies for small prefabricated buildings. Based on the case of “Four Seasons of Heshan”, this paper expounds the practical application of design strategies for small steel structure Prefabricated building, including quick construction and environmental protection; Free space and diverse decoration; High safety and complete functionality; Resource cycle, strong sustainability, etc.
A Prefabricated Wall with Automatic Air-Circulation and Dust-Removal Function Based on TRIZ Theory
Authors: Wang Yingjia , Yi Yanan , Man Xianhui
Published: July 2024

In response to the problems of high energy consumption, high maintenance costs, and large space occupation of traditional dust removal equipment, this work utilizes TRIZ theory to innovate and invent a prefabricated wall that automatically circulates air to achieve dust removal function. The wall includes three parts: a solar thermal module, an air circulation dust removal module, and a building solid waste regeneration material insulation module. It uses solar energy to provide power, drive air circulation exchange, and achieve the application of clean energy to reduce dust in the factory building, The effect of reducing summer room temperature and low-carbon heating in winter.
Exogenous Angiotensin-(1–7) Provides Protection Against Inflammatory Bone Resorption and Osteoclastogenesis by Inhibition of TNF-α Expression in Macrophages
Authors: Ren Jiayi , Kitaura Hideki , Noguchi Takahiro , Ohori Fumitoshi , Marahleh Aseel , Ma Jinghan , Kanou Kayoko , Fan Ziqiu , Mizoguchi Itaru
Published: July 2024

Renin–angiotensin–aldosterone system plays a crucial role in the regulation of blood pressure and fluid homeostasis. It is reported to be involved in mediating osteoclastogenesis and bone loss in diseases of inflammatory bone resorption such as osteoporosis. Angiotensin-(1–7), a product of Angiotensin I and II (Ang I, II), is cleaved by Angiotensin-converting enzyme 2 and then binds to Mas receptor to counteract inflammatory effects produced by Ang II. However, the mechanism by which Ang-(1–7) reduces bone resorption remains unclear. Therefore, we aim to elucidate the effects of Ang-(1–7) on lipopolysaccharide (LPS)-induced osteoclastogenesis. In vivo, mice were supracalvarial injected with Ang-(1–7) or LPS ± Ang-(1–7) subcutaneously. Bone resorption and osteoclast formation were compared using micro-computed tomography, tartrate-resistant acid phosphatase (TRAP) stain, and real-time PCR. We found that Ang-(1–7) attenuated tumor necrosis factor (TNF)-α, TRAP, and Cathepsin K expression from calvaria and decreased osteoclast number along with bone resorption at the suture mesenchyme. In vitro, RANKL/TNF-α ± Ang-(1–7) was added to cultures of bone marrow-derived macrophages (BMMs) and osteoclast formation was measured via TRAP staining. The effect of Ang-(1–7) on LPS-induced osteoblasts RANKL expression and peritoneal macrophages TNF-α expression was also investigated. The effect of Ang-(1–7) on the MAPK and NF-κB pathway was studied by Western blotting. As a result, Ang-(1–7) reduced LPS-stimulated macrophages TNF-α expression and inhibited the MAPK and NF-κB pathway activation. However, Ang-(1–7) did not affect osteoclastogenesis induced by RANKL/TNF-α nor reduce osteoblasts RANKL expression in vitro. In conclusion, Ang-(1–7) alleviated LPS-induced osteoclastogenesis and bone resorption in vivo via inhibiting TNF-α expression in macrophages.
Radiation-induced cavernoma in pediatric CNS tumors: a systematic review and treatment paradigm
Authors: Vacek Adam , Kaliaperumal Chandrasekaran
Published: July 2024

Purpose

This retrospective systematic literature review aimed to summarize available data regarding epidemiology, etiology, presentation, investigations, differentials, treatment, prevention, monitoring, complications, and prognosis for radiation-induced cavernous malformations (RICMs) in pediatric patients.

Methodology

Review conducted per PRISMA guidelines. Google Scholar, PubMed, Trip Medical Database, and Cochrane Library searched utilizing a keyphrase, articles filtered per inclusion/exclusion criteria, duplicates excluded. Based on criteria, 25 articles identified, 7 further excluded from the systematic data but included in discussion (5 × insufficient data, 2 × other systematic reviews).

Results

Many studies did not contain all explored data. 2487 patients reviewed, 325 later found to have RICM (143 male, 92 female). Mean age at irradiation 7.6 years (range 1.5–19). Mean total radiation dose 56 Gy (12–112). Most common indications for radiation—medulloblastoma 133x, astrocytoma 23x, ependymoma 21x, germinoma 19x. Mean age at RICM diagnosis 18 years (3.6–57). Mean latency to RICM 9.9 years (0.25–41). Most common anatomic locations—temporal 36, frontal 36, parietal 13, basal ganglia 16, infratentorial 20. Clinical presentation—incidental 270, seizures 19, headache 11, focal neurological deficit 7, other 13. 264 patients observed, 34 undergone surgery. RICM bled in 28 patients. Mean follow-up 11.7 years (0.5–50.3). Prognostic reporting highly variable.

Conclusions

From our data, pediatric RICMs appear to display slight male predominance, present about 10 years after initial irradiation in late teen years, and present incidentally in majority of cases. They are mostly operated on when they bleed, with incidental lesions mostly being observed over time. Further prospective detailed studies needed to draw stronger conclusions.
Genomic events stratifying prognosis of early gastric cancer
Authors: Molinari Chiara , Solaini Leonardo , Rebuzzi Francesca , Tedaldi Gianluca , Angeli Davide , Petracci Elisabetta , Prascevic Dusan , Ewald Jan , Rahm Erhard , Canale Matteo , Giovanni Martinelli , Tomezzoli Anna , Bencivenga Maria , Ambrosio Maria Raffaella , Marrelli Daniele , Morgagni Paolo , Ercolani Giorgio , Ulivi Paola , Saragoni Luca
Published: July 2024

Background

The purpose of the study was to conduct a comprehensive genomic characterization of gene alterations, microsatellite instability (MSI), and tumor mutational burden (TMB) in submucosal-penetrating (Pen) early gastric cancers (EGCs) with varying prognoses.

Methods

Samples from EGC patients undergoing surgery and with 10-year follow-up data available were collected. Tissue genomic alterations were characterized using Trusight Oncology panel (TSO500). Pathway instability (PI) scores for a selection of 218 GC-related pathways were calculated both for the present case series and EGCs from the TCGA cohort.

Results

Higher age and tumor location in the upper-middle tract are significantly associated with an increased hazard of relapse or death from any cause (p = 0.006 and p = 0.032). Even if not reaching a statistical significance, Pen A tumors more frequently present higher TMB values, higher frequency of MSI-subtypes and an overall increase in PI scores, along with an enrichment in immune pathways. ARID1A gene was observed to be significantly more frequently mutated in Pen A tumors (p = 0.006), as well as in patients with high TMB (p = 0.027). Tumors harboring LRP1B alterations seem to have a higher hazard of relapse or death from any cause (p = 0.089), being mutated mainly in relapsed patients (p = 0.093).

Conclusions

We found that the most aggressive subtype Pen A is characterized by a higher frequency of ARID1A mutations and a higher genetic instability, while LRP1B alterations seem to be related to a lower disease-free survival. Further investigations are needed to provide a rationale for the use of these markers to stratify prognosis in EGC patients.
Psychotherapeutisches Arbeiten bei Anfallserkrankungen im ambulanten Setting: eine integrative Herangehensweise
Authors: Schöndienst M. , Michaelis R. , Heinen G. , Jokeit H. , Eicher M. , Siegenthaler T.
Published: July 2024

Der vorliegende Artikel befasst sich mit Möglichkeiten der ambulanten psychotherapeutischen Arbeit bei Anfallserkrankungen. Er gibt Anregungen zur Bedeutung des Zeitrahmens in einer Behandlung, zur Vielfalt der Vorgehensmöglichkeiten, die sich aus einer ersten Exploration ergeben können, zur therapeutischen Relevanz der Fremdanamnese und zu den therapeutischen Möglichkeiten verschiedener psychotherapeutischer Ausrichtungen unter Berücksichtigung neuro- und sozialkognitiver Aspekte.
The Limits to Owning One’s Behavior: Husserl’s Phenomenology of Involuntary Action
Authors: Ferencz-Flatz Christian
Published: July 2024

This paper focuses on a lesser-known aspect of Husserl’s theory of action, namely his understanding of “involuntary behavior,” as developed especially in the recently published manuscripts gathered in Studien zur Struktur des Bewusstseins. Specifically, I follow the arguments leading Husserl in these manuscripts to make the peculiar claim that all involuntary behaviors can be appropriated and converted into voluntary action. In reflecting upon this argument I point out the merits of Husserl’s engagement with involuntary acts, which considerably reshape his practical philosophy, but I also highlight some of its important limitations, which originate in a structural shortcoming of Husserl’s theory in general, namely his presupposition of a rigorous parallelism between cognition, emotion, and action. By showing how this ultimately leads to a reductive and phenomenologically inaccurate view of practical experience, I conclude by pointing to some possible ways to overcome these limitations.