bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the application of 3D printing to wooden furniture connectors
Authors: Chen C C , Yang W Z , Teng H M , Liao S S , Tsao C C 
Published: November 2023

Abstract
With the rapid development of high technology in the 21st century, the manufacturing industry cannot be exempted from it. In addition, 3D printing is a multi-layer manufacturing technology that has emerged in recent years, and it is gradually integrated into the manufacturing process of components in various industries, such as aerospace, medical, military, transportation and construction industries. However, the use of 3D printing to make wooden furniture connectors has gradually replaced the traditional way of connecting wooden furniture. Like other 3D printed products, the size of the connectors of 3D printed wooden furniture is also affected by its molding accuracy. In order to obtain the best precision 3D printed wooden furniture connectors, the experimental parameters of this study are designed by Taguchi experiment method, and the measurement is carried out by 3D scanner equipment. The research results show that when the experimental parameters are the nozzle temperature of 200 °C, the layer thickness of 0.1 mm, the filling degree of 20 %, and the extrusion speed of 50 mm/s outside and 100 mm/s inside, the printed 3D wooden furniture connectors have the best accuracy.
The effect of carrier locking position on the dynamic characteristics of gapless miniature linear guideway
Authors: Chen C M , Chang H L , Chien C Y , Tsui C W 
Published: November 2023

Abstract
The analysis of the load position of the miniature linear guideway is very important for the dynamic friction characteristics of the linear motion equipment. In this paper, a miniature guideway dynamic friction coefficient tester will be designed. And the effect of load position, movement speed, and load on the friction force of linear guideway will be investigated according to the gapless. The experimental results show that the friction force will be dependent on the load position, load, and movement speed. Among them, the lowest frictional load position can be obtained at any speed of movement and load condition, which occurs at the central load position. The main reason for this is that the effect of the moment is minimum. On the same load position and movement speed, then load is proportional to friction. In the case of fixed load and load position, the effect of velocity on friction is positively correlated in the longitudinal offset position. The frictional force is aggravated by the unevenly distributed pressure on the inner ball due to the moment generated by the slider. At the same time, by observing the loading and the inclination angle of the carrier in the experiment with the laser displacement meter, it can be found that the inclination angle also tends to increase when the load increases.
FEM simulation on forming vacuum hexagon socket screws using tube workpiece
Authors: Teng H Y , Tzou G Y , Lu C , Huang G M 
Published: November 2023

Abstract
This study proposes a new forming design concept to produce vacuum hexagon socket screws using tube workpiece, and uses the finite element simulation software DEFORM-3D to simulate the multi-pass forming process of vacuum hexagon socket screws. The simulated material is SUS-304 stainless steel, and the frictional conditions are assumed to be constant shear friction, the die is assumed to be a rigid body. In the past, the traditional vacuum hexagon socket screw manufacturing process used a multi-pass process to manufacture a standard screw using a solid workpiece (wire rod), and then drilling an air channel in the core of the screw. This process not only wastes time, but also needs to increase the processing cost. In this study, the time and cost of drilling the air channel can be reduced by forming the vacuum hexagon socket head screw through the hollow tube. The finite element simulation results confirm that this design is a feasible method. The pass schedule can be reduced from 6 stages to 3 stages, the maximum effective stress decreased by 28.13%, and the total forming force decreased by 57.66%. The research results can be provided to relevant industry as the reference.
Preparation of modified expanded graphite and research on emulsified oil adsorption performance
Authors: Yu Qian , Kan Kan , Sun Tianshu , Zhang Xiaochen 
Published: November 2023

Abstract
Modified expanded graphite was prepared from expanded graphite and characterized by FT-IR, XRD and SEM. The results showed that the modified linear alkyl was successfully grafted onto the surface of expanded graphite, and the crystal structure and overall morphology did not change significantly after modification. Expanded graphite and modified expanded graphite adsorption columns were prepared, the adsorption experiment of emulsified oil was carried out. When the initial concentration of emulsion oil solution is 100 mg·L−1, the filling density is 3.5 g·L−1, and the flow rate is 3 L·h−1, the emulsion oil concentration decreases to 93 mg·L−1 and 6.5 mg·L−1, respectively, after adsorption by expanded graphite and modified expanded graphite, indicating that the adsorption performance of modified expanded graphite on emulsified oil is obviously improved. The saturated adsorbed modified expanded graphite was recycled by vacuum filtration. The results show that the modified expanded graphite still has good adsorption performance for emulsified oil after 1-3 times of regeneration, and can be used as adsorption material or recycled into sealing material.
Calcined and Hydrated Shell Powder with Layered Porous Structures for Food Sterilization and Pesticide Residue Removal
Authors: Liu Y S , Tang K X , Liao Y T , Huang R R , Zhu Y , Chen Z , Chen Y , Lin L 
Published: November 2023

Abstract
Shell powder, a natural source product with excellent adsorption and antibacterial properties, has exhibited a broad application prospect in daily life. Herein, low-temperature calcined shell powder (LCSP) and high-temperature calcined and hydrated shell powder (HCSP) were prepared using shells as raw materials in different calcination processes. The surface structures and the chemical compositions were analyzed and the specific surface areas and pore size distributions were measured. The LCSP and HCSP reserved the unique layered porous structures of the shell. The main composition of LCSP is CaCO3, which also contains a small number of organisms. The main composition of HCSP is Ca (OH)2, which also contains CaO and a small amount of CaCO3. According to the better adsorption characteristic of the HCSP, the antibacterial activities and the removal abilities of pesticide residues of HCSP were systematically studied. The results indicated that HCSP exhibited excellent antibacterial activity (> 99.99%) and high efficiency in removing common pesticide residues (> 90%).
Microstructure and Properties of TiCp/GH3536 prepared by Selective Laser Melting
Authors: Li Yan , Liu Jiawei , Song Meihui , Zhang Yu , Li Yanchun , Zhang Xiaochen 
Published: November 2023

Abstract
In this paper, TiCp/GH3536 composites were prepared by selective laser melting technology. The effects of volume energy density (VED) on the microstructure, densification, mechanical properties and thermophysical properties of TiCp/GH3536 composites were studied. The results show that the pores and nano TiC clusters in TiCp/GH3536 composites gradually disappear with the increase of VED. The interface between TiC ceramic phase and GH3536 matrix was well bonded, which was a non coherent interface, and there was no interface reactant. The optimal VED of SLM is 96.3 J/mm3, and the specific laser power, scanning rate, scanning spacing and powder layer thickness were 260W, 900 mm/s, 0.1mm and 0.03mm, respectively. The highest density of the composite is 99.96%; The maximum tensile strength and yield strength were 1137.2MPa and 900.6MPa, respectively.
Study on the microstructure and properties of copper/graphite composites with two-step method and copper-modified graphite
Authors: Ding Yi , Gao Jianfeng , Han Yu , Zhou MingYu , Wang HaiTian , Zhang Congrui , Liu Jinping , Wang YueChen , Ding Zhiyong , Wang Jing , Zhu ZhiXiang 
Published: November 2023

Abstract
In this experiment, copper was coated on the surface of graphite by chemical process. Besides, the microstructure and crystal structure of copper-coated graphite were characterized by SEM and XRD. Copper-plated C/Cu composite was prepared by SPS sintering technique of powder mixture by two-step method. In order to test the dispersion state of graphite in the composites and the phenomenon of interfacial dispersion, the effect of graphite content on the properties of copper-coated C/Cu composites was also an important point. Therefore, the microscopic characterization and performance test were carried out. The results show that magnetic stirring and high-energy ball milling ensure the uniformity of copper-coated graphite in copper matrix, and conducted structural grain refining. The grain size of copper, and the properties of composite materials decreased with the increase of graphite content, such as relative density, conductivity and hardness. However, the further increase of graphite content leads to excessive grain size, the relatively long time of ball milling makes the fine grain become larger after sintering. When the graphite content is 1.0wt.%, the relative density, conductivity and hardness are 99.91%, 92.1%IACS and 67.7 HV, respectively. It is proved that copper-coated graphite and two-step powder mixing play an important role on improving the properties of the composites.
Long-life Inorganic Electrochromic Device Based on WO3 and PB Films with Fast Switching Respond
Authors: Wei Y X , Li J Y , Liu W M , Yan Y 
Published: November 2023

Abstract
Complementary electrochromic devices were fabricated by using tungsten trioxide (WO3) film as working electrode, Prussian blue (PB) film as counter electrode and 0.1 M lithium perchlorate in propylene carbonate as electrolyte. The XRD result presents that WO3 and PB films are amorphous, which is favourable for a fast ion intercalation-deintercalation process. The device was tested under potentiostatic control using ±1.3 V steps, and changed its color between blue and colorless. It has a fast-switching respond (about 1.5 s for colouring and 2 s for bleaching) and could withstand 100,000 cycles with little change in its optical contrast.
Research on the manufactured Technology of High-precision Load Connecting Frame Structure with Special-shaped Variable Shaped Cross-section
Authors: Xu Ting , Wu Haisheng , Sheng Chao , Fang Jin , Guo Xiaoyong , He Cheng , Wei Yuxuan 
Published: November 2023

Abstract
Aiming at the research and development technology of high-precision load connecting frame structure with special-shaped variable cross-section reinforced by internal cross bars, the two-step weaving and stitching fiber preform forming process scheme and the general RTM product forming process scheme of load connecting frame are discussed by using the comparison method; The virtual simulation of RTM glue injection process is studied by using ESI Group software, and the results show that the completion time of the glue injection process with four sprues is about 29.4% of that of the glue injection process with only one sprue, which guides the design of RTM molding design; The key process of product manufacturing, such as the glue injection and curing process of the product and the quality control process during the technological process, are analyzed, and the performance of the final product is evaluated. Through the research on the manufacturing process, we have overcomed the major constraints on several molding technologies, such as the two-step fiber preform molding technology of weaving and stitching, the RTM molding design and processing technology of complex and special-shaped composite products, the split molding technology, and combination finishing processing technology after secondary bonding. The results prove that the formed products have better forming quality, dimensional accuracy and thermal cycle dimensional stability. The nondestructive testing results of composite parts show that the internal structure of the product is good. The fiber volume fraction is controlled at (55 ± 3)%, the flatness of the important surface of the product is 0.05 mm and 0.03mm respectively, and the dimensional accuracy of the important interface is controlled within ± 0.02 mm. The dimensional stability after the thermal cycle test is good, and all indicators of the product meet the user’s requirements, which achieved expected goals. The success on the manufacturing of these products provides a technical basis for the design and manufacture of high-precision and high stiffness composite structures for deep space exploration and manned spaceflight.
Preparation and Properties of Graphene/ODA-PMDA-NTADA Copolyimide Nanocomposites Based onKH550-modification
Authors: Li Quantao , Zhu Pengcheng , Zhu Yanjin , Wang JianFei , Chen Wenqiu , Xu Zushun 
Published: November 2023

Abstract
In this study, KH550-modified graphene/ODA-PMDA-NTADA copolyimide nanocomposites were successfully made in an organic medium using KH-550 chemically modified reduced graphene oxide (rGO-NH2) as a multi-functional comonomer combinied with commercially available ODA, PMDA, and NTADA monomers, and their dispersive, morphological, thermal, viscous, conductive properties were investigated. Compared to pure PI, the dispersion compatibility, thermal characteristics and electrical conductivity of the produced nanocomposites were improved significantly. The improved rGO/PI nanocomposites showed more than 20 °C and 10 °C increase of Td5% and Td10% values respectively. This research demonstrates a facile and efficient method for creating homogeneous and multi-functional PI-based engineering materials and advanced functional materials.
Yellow YAG-Ag/Al2O3 film applied to blue laser illumination
Authors: Wen Haiyang , Zhou Tianliang , Xie Rong-Jun 
Published: November 2023

Abstract
The most popular light-emitting component for laser illumination right now is phosphor in glass (PiG), however its major weakness is the poor heat conductivity. In this research, the yellow YAG:Ce phosphor and Ag paste were co-fired on an Al2O3 substrate using the blade-coating approach to create a PiM (phosphor in metal) film. Due to the ultra-high thermal conductivity of Ag, the highest blue laser power density that YAG-Ag PiM can achieve is 9.2 W·mm−2, and the maximal luminous flux, lumen efficiency and CCT (correlated color temperature) are 620 lm, 172 lm·W−1 and 6244 K, respectively.
Failure Analysis of Corrosion and Fracture of P110 Tubing in a Development Well
Authors: Han Yan , Ren Hong , Zhang Wenbin , Fu Anqing , Ma Qingwei 
Published: November 2023

Abstract
In this paper, a fractured and corroded tubing string was analyzed through macroscopic observation, chemical composition analysis, metallographic and mechanical test. The corrosion products were studied by SEM, EDS, and XRD method. The results showed that the corrosion of tubing in this well was caused by CO2 corrosion, the well contains CO2 medium and increasing water cut in the late stage of development were the main reasons of serious corrosion, the scaling on the tubing wall aggravated the corrosion. Finally, some suggestions were proposed for avoiding or slowdown this kind of corrosion failures.
Above-room-temperature ferromagnetism in a layered CrIr2Sn10 crystal
Authors: Sun Xuzhou , Yang Ke , Fang Yuqiang , Wu Hua , Huang Fuqiang 
Published: November 2023

Abstract
Layered ferromagnetic (FM) materials are significant for nano-spintronic devices, however, low transition temperature and air instability remain major challenges for layered FM compounds. Herein, we have synthesized layered crystals CrIr2Sn10 with FM transition below 315 K. The ratio of the magnetization between in-plane and out-of-plane is 41. Moreover, the magnetism of CrIr2Sn10 is derived from the highly spin-polarized Cr atoms. CrIr2Sn10 will be a promising platform for 2D magnetism and spintronic devices.
Higher-order obstructed atomic insulator phase in pentagonal monolayer PdSe2
Authors: Nuñez Victor , Bravo Sergio , Correa J D , Chico Leonor , Pacheco M 
Published: November 2023

Abstract
We investigate a pentagonal monolayer of palladium diselenide, a stable two-dimensional system, as a material realization of a crystalline phase with nontrivial topological electronic properties. We find that its electronic structure involves an atomic obstructed insulator related to higher-order topology, which is a consequence of the selenium-selenium bond dimerization along with inversion and time-reversal symmetry). By means of first-principles calculations and the analysis of symmetry indicators and topological invariants, we also characterize the electronic corner states associated with the atomic obstruction and compute the corresponding corner charge for a finite geometry, which is found to be not quantized but still inversion-protected. Applying tensile strain to the finite geometry we verify the robustness of the corner states and also achieve a strain-controlled variation of the corner charge magnitude.
EEG-fest: few-shot based attention network for driver's drowsiness estimation with EEG signals
Authors: Ding Ning , Zhang Ce , Eskandarian Azim 
Published: November 2023

Abstract
The leading factor behind most vehicular accidents is the driver’s inattentiveness. To accurately determine driver’s drowsiness, Electroencephalography (EEG) has been proven to be a reliable and effective method. Even though previous studies have developed accurate driver’s drowsiness detection algorithms, certain challenges still persist, such as (a) limited training sample sizes, (b) detecting anomalous signals, and (c) achieving subject-independent classification. In this paper we propose a novel solution, names as EEG-Fest, which is a generalized few-shot model aimed at addressing the aforementioned limitations. The EEG-Fest has the ability to (a) classify a query sample’s level of drowsiness with only a few support sample inputs (b) identify whether a query sample is anomalous signals or not, and (c) perform subject-independent classification. During the evaluation, our proposed EEG-Fest algorithm demonstrates better performance compared to other two conventional EEG algorithms in cross-subject validation.
Tensile properties and fracture behaviors of electron-beam welded Ti6242 titanium alloy joints
Authors: Fang Xu , Jing Wen , Xiufeng Han , Jianfeng Zhang 
Published: November 2023

Abstract
The microstructure, tensile properties and fracture behaviors of electron-beam welded Ti6242 titanium alloy joints were systematically investigated. The as-received alloy exhibited a typical duplex microstructure consisting of equiaxed primary α phase and laminated secondary α phase/β phase. The high cooling rate during welding resulted in substantially microstructure evolution in the fusion zone (FZ) of the joints, leading to the formation of large columnar β grains with embedded acicular α′ martensitic phase platelets. The influences of such microstructure variations on the mechanical properties and fracture behaviors at different temperatures were analyzed and discussed. In principle, the hard-yet-brittle α′ martensitic phase induced significantly strengthening of the FZ. As a result, for the un-notched specimens, the plastic deformation was concentrated to the soft base material with subsequent ductile fracture via micro-void coalescence mechanism. But for the notched specimen, in which the notch located just within the FR, cracks initiated and proceeded along the FR in a brittle manner.
Law Without the State
Authors: Levinson Daryl J 
Published: November 2023

Abstract
An effective system of law must be able to authoritatively specify what the law is, and then get its subjects to follow it. Skeptics of international law have long questioned its ability to meet this standard, wondering, for instance, why a global superpower like the United States would bow to a rule of international law that disserved its interests, rather than changing, disregarding, or interpreting it away. Constitutionalists have paid less attention to these kinds of questions than their internationalist counterparts, but they have equal reason to wonder why, for instance, a president of the United States would choose to abide by constitutional limitations rather than dismissing them as merely “parchment barriers.” This chapter describes the common challenge of constitutional and international law in achieving legal settlement and compliance in the absence of a crown-wearing, sword-wielding Leviathan standing above.
Law Versus Sovereignty
Authors: Levinson Daryl J 
Published: November 2023

Abstract
Sovereignty, as Hobbes conceived it, denied the existence of any higher power standing over the state—including the power of law, international or constitutional. Even as these systems of law for states have taken hold, they have been forced to wrestle with ongoing Hobbesian doubts. As recent waves of populist and nationalist resistance to globalism illustrate, international law is too easily cast as an illegitimate threat to state sovereignty. While constitutional self-government is sometimes held up as the contrasting ideal, sovereignty is no less a problem for constitutionalism, demanding an explanation for why legal limitations on democratic self-governance serve not as constraints on popular sovereignty but as sovereignty’s authentic expression. This chapter presents the parallel struggles of international and constitutional law to come to grips with sovereignty, while suggesting that the “artificial man” of Leviathan has made Hobbesian sovereignty an artificial problem for regimes of law governing the state.
Balancing Power
Authors: Levinson Daryl J 
Published: November 2023

Abstract
Another approach to controlling state power is to “balance” it. From Hobbes to Henry Kissinger, international relations realists have looked to the balance of power among rivalrous states as the best hope of keeping them mutually in check. Constitutionalists since Madison have attempted to recreate the realist strategy within the state, relying on the competing “ambitions” of the different branches of government to generate a stable equilibrium of checks and balances. As this chapter explains, however, the constitutional version of power-balancing is doubly misguided. One problem, long recognized by internationalists, is that the realist premise of perpetual competition among power-seeking Leviathans often fails, for predictable reasons, to match the actual behavior of states and governments. But the more fundamental problem is that balancing power at the level of government bodies does nothing to protect the people and groups in society who are actually vulnerable to domination and oppression. Constitutionally balanced power is no bar to tyranny.
New Leviathans
Authors: Levinson Daryl J 
Published: November 2023

Abstract
After a triumphant run of half a millennium since Hobbes, the state appears to be weakening, if not withering away. Increasingly usurping the state’s functions are a proliferation of international, regional, and nongovernmental organizations engaged in “global governance.” At the same time, the power of states to control their economies and societies has been challenged and rivaled by Big Tech and other multinational corporations, which have increasingly come to resemble privatized, nonterritorial governments. This final chapter explores what might be different in a world in which states have ceded power to these new Leviathans, global and corporate. As far as the design of legal regimes goes, the answer may be, surprisingly little. Even if the Hobbesian state is on the road to retirement, Law for Leviathan is likely to live on.