bluuebunny/crossref_metadata_2025_split huggingface dataset:
Periodic Multiple Component Reassignments Preventive Maintenance Under Unequal Assignment
Authors: Fu Yuqiang , Cui Yifei , Ma Xiaoyang , Zhao Fei , Hao Yaqian 
Published: January 2025

ABSTRACTMany physical systems contain a series of positions with different degradation characteristics and a series of functionally interchangeable components, in which the component reassignment (CR) is usually used to balance the degradation characteristics by reassigning the workloads of components. Although many research has been conducted on CR‐related problems, there is no existing research on periodic CR policy under unequal assignment, in which the number of components and positions are unequal. This paper proposes a new type of CR‐based preventive maintenance policy, namely, the periodic multiple CRs (PMCRs) policy. The PMCRs policy implements periodic CRs before the system replacement, minimal repairs for sudden failed components, and unequal assignment between positions and components. An optimization model is established to find the optimal number of CRs, the optimal interval for adjacent CRs, and the optimal assignment for CRs with the objective of minimizing the expected annual system maintenance cost. Furthermore, the upper bound and the lower bound on the optimal number of CRs are derived. Finally, based on the genetic algorithm‐based matheuristic method, numerical examples show that the proposed PMCRs policy can be used as an effective tool to improve the system's performance.
Systematic Profile of Oxylipins in Myocardial Infarction by Liquid Chromatography–Tandem Mass Spectrometry
Authors: Tan Xin , Ni Hui , Li Qin , Ma Zhanglin 
Published: January 2025

ABSTRACTRationaleOxylipins play an important role in inflammatory processes, accompanying the occurrence of myocardial infarction. Analyzing a wide panel of oxylipins derived from more polyunsaturated fatty acids may provide valuable information to elucidate the relationships between the signaling mediator profile and myocardial infarction comprehensively.MethodsAn ultrahigh‐performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) method for simultaneously measuring 74 oxylipins in 50‐μL human samples with a 10‐min chromatographic run and easy operation has been developed and validated.ResultsAccuracy and precision were below 15% of the relative errors in 99% of quality control. Recoveries and matrix effect were considered acceptable. Potential effects of different collecting tubes were also assessed. We successfully utilized our approach to measure plasma samples obtained from 99 healthy individuals and 302 myocardial infarction patients.ConclusionsProfiles of oxylipins discovered potential biomarkers and clarified the pathological characteristics of oxylipin metabolism in myocardial infarction. Our approach was rapid, accurate, and precise, with high throughput, low sample volume, and easy operation, suitable for large‐scale studies.
Real‐time Nonlinear Model Predictive Control of a Robotic Arm Using Spatial Operator Algebra Theory
Authors: Yaren Tuğçe , Kizir Selçuk 
Published: January 2025

ABSTRACTNonlinear model predictive control (NMPC) has inherent challenges, such as high computational burden, nonconvex optimization, and the necessity of powerful and fast processors with large memory for real‐time robotics. In this study, a new NMPC strategy is proposed using Spatial Operator Algebra (SOA) theory to address these challenges, and experimental results are presented for the five degrees of freedom robot manipulator. The proposed scheme is based on an NMPC controller using the SOA‐based dynamic model to provide good tracking performance and ensure the satisfaction of constraints. Two novel control schemes, SOA–NMPC and SOA–NMPC proportional‐derivative (PD), are introduced for a comprehensive analysis of the proposed innovative approach. The validity of the proposed scheme is experimentally tested through robustness analysis conducted across various tasks, including the addition of weight and exposure to internal/external disturbances. The effectiveness of the proposed approach is demonstrated through benchmarking against NE‐NMPC using the Newton–Euler (NE) algorithm, classical MPC, MPC‐PD, and PID techniques. The comparative results show that the SOA–NMPC controller provides effective performance and ensures constraints for the entire trajectory of the manipulator, even under varying conditions.
Bridging Student Funds of Knowledge With Science Discourse: An Examination of the Organizational Context That Shaped Teachers' Sense of Agency for Instructional Change
Authors: Hogan Erin , Bae Christine 
Published: January 2025

ABSTRACTThis study, which is part of the special issue on Teacher Learning and Practice in Organizational Contexts, investigated the ways in which urban middle school science teachers' organizational contexts influenced their ability to identify and leverage minoritized students' funds of knowledge (FoK) to facilitate equitable science learning through hybrid discourse. Ten science teachers received professional development from an external, university partner and ongoing professional learning as part of lesson study. We used a multiple case study methodology and applied the Instructional Capacity Framework and the concept of teacher agency to analyze lesson study artifacts (classroom videos, lesson plans, and TeachFX reports) and interviews where teachers described their perspectives on organizational barriers and facilitators to the implementation of hybrid discourse. Findings demonstrate how individual, organizational, and external factors interacted to produce differences in teams' approaches to hybrid discourse and the individual and collective agency they held for engaging in this work. To all teams, teacher agency was needed to challenge organizational culture and schooling norms that historically did not value minoritized students' FoK or opportunities to construct scientific understandings. External policies, especially high‐stakes tests, reified this culture, which was, in turn, internalized by teachers and students as actors within the organization. These interacted with teachers' dispositions (e.g., critical reflexivity and perspectives on the value of students' FoK) as well as capacities within their organization generated via lesson study to influence the degree to which teachers exerted agency to implement hybrid discourse. We close by discussing implications for future teacher learning experiences aligned to equitable science instruction.
Empirical Exploration of the Drivers of Human Development in Central and West Asian Countries: How Effective Are Control of Corruption, Political Stability and the Rule of Law?
Authors: Celik Ali , Kostekci Ahmet 
Published: January 2025

ABSTRACTGood governance indicators such as controlling corruption, establishing the rule of law, and ensuring political stability are central to social well‐being as they affect both sustainable income growth and non‐income indicators of human development. However, human development is still not a priority in Central and West Asia, where humanitarian problems are widespread and the literature on the impact of good governance on human development is limited. Moreover, the effects of corruption, rule of law and political stability on human development in Central and West Asia are not conclusive due to the limitations of inclusive studies. Therefore, this research explores the impact of economic, demographic, and environmental factors as well as governance factors such as corruption, political stability, and the rule of law on human development in Central and West Asian countries applying the advanced panel econometric techniques for the period between 2002 and 2021. The findings indicate that corruption has a negative influence on human development, but raising control of corruption has positive impact on human development. Furthermore, political stability and the rule of law positively contribute human development. Moreover, trade openness, and CO2 emissions promote human development, while inflation, unemployment and, population growth have negative effects on human development. In conclusion, the findings obtained from the study provide important clues and new perspectives for policy makers to achieve the human development goal in the region in question. Accordingly, our results stress that Central and West Asian countries need to adopt transparency and accountability‐oriented policies to reduce corruption, establish the rule of law and ensure political stability in order to achieve high human development.
Unraveling Various Sources of Particulates Matter in Air‐Dust Samples Collected from North India Through Elemental Mapping and Concentration Correlation Using Micro‐Particle‐Induced X‐Ray Emission Spectroscopy
Authors: Saini Darshpreet Kaur , Byers Todd A. , Verma Shivcharan , Sharma Mohin , Parashar Mritunjaya , Bowen Charles T. , Mohanty Biraja , Glass Gary A. , Rout Bibhudutta 
Published: January 2025

AbstractParticulate matter (PM) found in the air is one of the major sources of pollution and air‐borne diseases. Therefore, it is imperative to examine the elemental concentration distribution of the PM to identify the pollutant sources. In this study, it has demonstrated the capabilities of micro‐particle‐induced X‐ray emission (micro‐PIXE) spectroscopy in quantitative analysis of air samples collected from the Old Delhi outdoor market and indoor locations in the Panjab University hostel in the winter months. A 2‐million electronvolts energetic scanning proton micro‐beam (diameter ≈1 µm2) is used in micro‐PIXE experiments generating high‐resolution elemental maps of different regions of interest (ROI). Micro‐PIXE along with the GeoPIXE analysis provides a non‐destructive, standard‐less, and ng/mg level‐sensitive tool for the investigation of elemental distributions and highlighting pixels, which correlates to specific concentration ratios between elements at ROIs, thereby enabling a comprehensive understanding of the source of each elemental particulate. Si, Ca, and K detected in indoor PM suggest the source to soil erosion and crop burning, while high S levels in outdoor PM are primarily associated with coal power plants. Additionally, Sc, Ti, Cr, Mn, and Zn are found in outdoor samples, while indoor locations also contained trace amounts of V, Co, and Cu.
Sustainable Electrospun Hybrid Nanofibers for Triboelectric Nanogenerators
Authors: Thomas‐Kochakkadan Sweetly , Duque Marcos , Murillo Gonzalo , Nirwan Viraj P. , Fahmi Amir 
Published: January 2025

AbstractTriboelectric nanogenerators (TENGs) have emerged as potential energy‐harvesting modules for miniaturized devices. TENG modules are derived often from components having low sustainability whereas the current environmental and economic circumstances demand a focus on sustainable, ecologically friendly approaches for the development of advanced hybrid materials. Herein, recycled polyethylene terephthalate (PET) along with commercially available nylon are electrospun into nanofibers for TENG devices. The obtained nanofibers are characterized using microscopy, spectroscopy, and thermal and mechanical analysis. Electrospinning of pristine and titanium dioxide nanoparticles (TiO2 NPs) blended polymer solutions resulted in uniform nanofibers without beads. The addition of TiO2 NPs improved the thermal properties and significantly improved the mechanical stability of the nanofibers. The performance of the fabricated TENG device has been improved by functionalizing the nanofibers with TiO2 NPs. Particularly, the combination of pristine PET and TiO2 NPs (5%) functionalized nylon nanofibers reached a peak power density of 23.44 mW m−2 with a surface charge density of 6.81 µC m−2, a max output voltage of 111 V and a max current of −1.61µA. This study opens a new avenue to utilize upcycled cost‐effective polymers processed using electrospinning as a powerful tool for the fabrication of the next generation of sustainable TENG devices.
Surface Engineered MoS2‐Based Novel Vertical Triboelectric Nanogenerator (V‐TENG) for Wireless Information Processing
Authors: Biswas Mukul , Bhattacharya Didhiti , Mondal Rahul , Bhunia Ritamay , Garg Ashish , Chowdhury Avijit 
Published: January 2025

AbstractSelf‐sustaining mechanical energy harvesting devices are pivotal for developing durable energy‐efficient systems, providing scalable and adaptable solutions to wearable technology. Triboelectric nanogenerators (TENGs) efficaciously convert ambient mechanical energy into usable electrical power to sustainably drive modern electronics. Surface and structural engineering is an avenue to boost TENGs’ energy harvesting through modulating contact interfaces and charge transfer interactions between the constituent layers. This study explores dielectric engineering incorporating an additional transition layer, such as Polyethylene Terephthalate (PET), alongside kapton to store accumulated charges. The surface of molybdenum sulfide (MoS2) is modified with different aromatic carboxylic acids to boost the vertical TENG's performance. The anchoring of aromatic carboxylic acid [4,4′‐Oxybis (Benzoic acid)] modifies the work function and surface charge density of MoS2‐based TENG and enhances the output performance. The output open‐circuit voltage (VOC) and short‐circuit current (ISC) for “PET‐Kapton@4,4′‐MoS2” TENG increase from 6 to 30 V and 65 to 202nA, respectively. The maximum power density obtained after inserting the transition layer and modifying the MoS2 surface is 399 mW m−2. The “PET‐Kapton@4,4′‐MoS2” TENG can power up to 6 LEDs, run a calculator, and generate International Morse code. A microcontroller unit successfully decodes the Morse code and transmits it wirelessly to a smartphone via Wi‐Fi.
Unlocking Peak Efficiency in Anion‐Exchange Membrane Electrolysis with Iridium‐Infused Ni/Ni2P Heterojunction Electrocatalysts
Authors: Salokhe Balaji S. , Nguyen Thanh Tuan , Rawat Rohit Singh , Song Hewei , Kim Nam Hoon , Lee Joong Hee 
Published: January 2025

AbstractDeveloping cost‐effective, highly efficient, and durable bifunctional electrocatalysts for water electrolysis remains a significant challenge. Nickel‐based materials have shown promise as catalysts, but their efficiency in alkaline electrolytes is still lacking. Fascinatingly, Mott–Schottky catalysts can fine‐tune electron density at interfaces, boosting intermediate adsorption and facilitating desorption to reduce the energy barrier. In this study, iridium‐implanted Mott–Schottky Ni/Ni2P nanosheets (IrSA–Ni/Ni2P) is introduced, which are delivered from the metal–organic framework and employ them as the bifunctional catalysts for water electrolysis devices. This catalyst requires a small 54 mV overpotential for hydrogen evolution reaction (HER) and 192 mV for oxygen evolution reaction (OER) to reach 10 mA·cm−2 in a 1.0 m KOH electrolyte. Density functional theory (DFT) calculations reveal that the incorporation of Ir atoms with enriched interfaces between Ni and Ni2P can promote the active sites and be favorable for the HER and OER. This discovery highlights the most likely reactive sites and offers a valuable blueprint for designing highly efficient and stable catalysts tailored for industrial‐scale electrolysis. The IrSA‐Ni/Ni2P electrode exhibits exceptional current density and outstanding stability in a single‐cell anion‐exchange membrane electrolyzer.
Triggered “On/off” Luminescent Polypeptide Bowl‐Shaped Nanoparticles for Selective Lighting of Tumor Cells
Authors: Gao Yaning , Wang Yin , Jiang Jinhui , Wei Ping , Sun Hui 
Published: January 2025

AbstractFunctional polymeric nanoparticles, especially those with anisotropic structures, have shown significant potential and advantages in biomedical applications including detecting, bioimaging, antimicrobial and anticancer. Herein, tetraphenylethylene (TPE) and azobenzene modified polypeptides of poly((L‐glutamic acid) tetraphenylethylene‐stat‐(L‐glutamic acid)) (P(GATPE9‐stat‐GA25)) and poly((L‐glutamic acid) azobenzene‐stat‐(L‐glutamic acid)) (P(GAAzo5‐stat‐GA29) are synthesized, which self‐assemble into bowl‐shaped nanoparticles (BNPs) with controlled diameter, opening size and fluorescent property individually, or by co‐assembly. Due to the quenching effect of azobenzene, the fluorescence of the coassembled BNPs is completely inhibited. Upon incubated under reduction environment, the fluorescence of the BNPs is re‐excited owing to the reduction or break of azo bonds. Benefiting from the high‐level azo reductase in hypoxic liver cancer cells comparing to normal liver cells, the quenched BNPs exhibit pronounced fluorescence signal in human hepatoma (HepG2) cells under hypoxic condition, demonstrating the high efficiency of the reduction‐responsive luminescent BNPs for selective screening of tumor cells. In addition, it is also found that a proper opening size promotes the cellular uptake of the BNPs even with size up to micron. Overall, this study provides a fresh perspective in the controlled preparation of anisotropic polymeric nanoparticles and high efficient cancer cell screening.
3D Printed Spectroelectrochemical Platform for Redox‐Based Bioelectronics
Authors: Chen Chen‐Yu , Kim Eunkyoung , Zakaria Fauziah Rahma , Chu Monica J. , Wu Benjamin , Payne Gregory F. , Bentley William E. 
Published: January 2025

AbstractRedox provides unique opportunities for interconverting molecular/biological information into electronic signals. Here, the fabrication of a 3D‐printed multiwell device that can be interfaced into existing laboratory instruments (e.g., well‐plate readers and microscopes) to enable advanced redox‐based spectral and electrochemical capabilities is reported. In the first application, mediated probing is used as a soft sensing method for biomanufacturing: it is shown that electrochemical signal metrics can discern intact mAbs from partially reduced mAb variants (fragmentation), and that these near‐real‐time electrical measurements correlate to off‐line chemical analysis. In the second application, operando spectroelectrochemical measurements are used to characterize a redox‐active catechol‐based hydrogel film: it is shown that electron transfer into/from the film correlates to the molecular switching of the film's redox state with the film's absorbance increasing upon oxidation and the film's fluorescence increasing upon reduction. In the final example, a synthetic biofilm containing redox‐responsive E. coli is electro‐assembled: it is shown that gene expression can be induced under reducing conditions (via reductive H2O2 generation) or oxidative conditions (via oxidation of a phenolic redox‐signaling molecule). Overall, this work demonstrates that 3D printing allows the fabrication of bespoke electrochemical devices that can accelerate the understanding of redox‐based phenomena in biology and enable the detection/characterization redox activities in technology.
A Numerical and Parametric Study on Metallic Double Corrugated Damper Directly Connected to CBF Braces
Authors: Kontoni Denise‐Penelope N. , Ghamari Ali 
Published: January 2025

ABSTRACTAlthough concentrically braced frames (CBFs) pertain to high elastic stiffness and strength, they suffer from low energy dissipation capacity. This dilemma is due to the susceptibility of the diagonal member of the CBF to buckling. On the contrary, adding passive metallic energy dampers, although improving the behavior of the system, imposes more cost to structure and more constructional complexity. To overcome the problem, in this study, an innovative shear damper is made of a double corrugated plate for the web and two flange plates, called double corrugated damper (DCD). The numerical results using the Finite Element Method (FEM) indicated that the proposed damper pertains to a suitable performance with stable hysteresis curves under cyclic loading without degradation in stiffness, strength, and energy dissipation. This is true just to a certain lateral deformation. Also, numerical results under the monotonic loading indicated that the proposed damper shows an overstrength, Ω, of more than 1.5 (as recommended by AISC), and thus, Ω = 2.5 was proposed for it. Although links are categorized according to the factor in AISC 341‐16, the results indicated that dampers with the same revealed different response curves. Also, using the proposed damper with a corrugation angle instead of leads to an increase in the ultimate strength and stiffness, respectively, between 12% and 19% and 6% and 13% related to the flange thickness . The effect of on this damper's performance is greater on dampers with thin flange plates than on dampers with thick flange plates.
Inverse Eigenmode Modeling and Multiscale Seismic Analysis of Irregular Frame Structure by Shear Spring–Multifloor Mass System
Authors: Akehashi Hiroki , Watai Kazuki , Kamoshita Naoto 
Published: January 2025

ABSTRACTA modeling method of an elastic shear spring–multifloor mass system (MF system) based on the fundamental eigenmode and natural circular frequency of a full‐scale structural frame is presented. MF system has plural lumped masses as representative of single floor, and the lumped masses are connected by interfloor shear springs. MF system focuses on both global and local responses of the original frame, namely, the total displacement, the non‐uniform displacements of an identical floor and the member force distributions. Therefore, the alternative use of MF system to the original full‐scale frame leads to the accurate and rapid evaluation of the responses of the frame. The introduction of the coupled shear springs to the modeling formulation provides the coupled horizontal responses in the two orthogonal directions. In addition, the interstory shear force distribution of the original frame and that of the equivalent MF system correspond. The accuracy of the proposed method is investigated through numerical examples for in‐plan irregular frames.
Experimental and Numerical Analysis of Plate–Fiber‐Reinforced Composite Double Coupling Beams
Authors: Tian Jianbo , Jiao Song , Yu Qinghua , Liu Yunhe , Shi Qingxuan , Wang Mengmeng , Zhao Yong 
Published: January 2025

ABSTRACTCoupling beams characterized by a small span‐to‐depth ratio are particularly susceptible to brittle shear failures during seismic activities. To improve their seismic performance and alter their modes of failure, four distinct types of coupling beams were conceptualized, designed, and fabricated. The low‐cyclic reversed loading tests of the reinforced concrete (RC) single coupling beam, the RC double coupling beam, the plate‐reinforced composite (PRC) double coupling beam, and the plate–fiber‐reinforced composite (PFRC) double coupling beam were completed. The test results indicate that the double coupling beam demonstrates commendable ductility and a notable capacity for energy dissipation. It is beneficial for dissipating a significant amount of seismic energy and delaying damage to the wall limb. Adding steel plates to the double coupling beams can enhance their shear bearing capacity and prevent brittle shear failure. Substituting the matrix material with fiber‐reinforced concrete (FRC) significantly enhances the interaction between the concrete and the steel plates, leading to improved seismic performance of the coupling beams. Compared to RC double coupling beams, PFRC double coupling beams reach peak bearing capacity more quickly and exhibit an approximately 56.27% increase in bearing capacity. The axial forces exerted on the embedded steel plates within the PFRC double coupling beam are higher than those observed in the PRC double coupling beam. The use of fiber can improve the failure mode of the PRC double coupling beam. Finally, based on the experiments, a parametric analysis of the PFRC double coupling beams was conducted using ABAQUS software.