bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigating physical and mechanical properties of alumina/acrylonitrile butadiene styrene composites manufactured by fused deposition modeling
Authors: Zolfaghari Abbas , Roshan Arman Gholizade , Shakeri Mohsen 
Published: November 2024

AbstractIn recent years, 3D printing technologies or additive manufacturing have gained significant attention in research and other industries. Among the various 3D printing techniques, fused deposition modeling has been the most widely adopted. This study focused on developing composite filaments by incorporating acrylonitrile butadiene styrene (ABS) with different volume percentages of aluminum oxide (alumina). The mechanical and physical properties of parts printed with these composite filaments were thoroughly evaluated. Tensile testing revealed that increasing the alumina content led to a reduction in tensile strength. At 20 vol%, tensile strength dropped by 72%. A heat deflection temperature (HDT) test indicated an 11% reduction in HDT, likely due to the defective composite structure. Thermogravimetric analysis test demonstrated improved thermal stability as alumina content increased. Linear shrinkage was measured in three directions, revealing anisotropic shrinkage patterns. Hardness tests were conducted, and a decrease was observed when the polymer was filled with alumina. Finally, the warpage was reduced by 91% as alumina content increased to 20%.Highlights
Alumina/ABS composite filaments were manufactured and 3D‐printed very well.
The void content in composite samples increases with alumina powders.
The mechanical properties of 3D‐printed composite parts were decreased
The alumina powder improves the warpage issues in 3D‐printed parts.
Advances in constructing Carbon Fiber‐MXene multilevel structures to reinforce interfacial properties of carbon fiber reinforced polymer composites
Authors: Yuan Xiaomin , Li Shengnan , Qin Rongman , Zhang Min , Zhu Bo , Cao Weiwei 
Published: November 2024

AbstractCarbon fiber reinforced polymers (CFRPs) have received widespread attention due to their excellent mechanical properties. However, the poor interfacial properties between CF and resin matrix urgently need feasible and efficient surface modification strategies of CF to regulate the interface. Due to its unique layered structure and abundant surface groups, MXene has been increasingly used in the field of CFRP interfacial modification in recent years. It possesses the advantages of good stability, large specific surface area, abundant adsorption sites and rich functional groups, which could effectively improve surface polarity, roughness and wettability of carbon fibers, thus enhancing effective interfacial bonding and enabling hierarchical regulation of interface in CFRPs. This paper reviews feasible strategies for constructing CF‐MXene multilevel structures, including electrophoretic deposition, chemical grafting, electrostatic self‐assembly, and sizing coating. Then, the strengthening mechanism involving surface morphology, mechanical properties, and interfacial strength of CFRPs are systematically evaluated centered on interfacial activity, interfacial adhesion, surface roughness and surface energy. Meanwhile, the problems in introducing MXene to CF surfaces and future research directions are systematically prospected. This paper could provide valuable guidance to construct CF‐MXene multilevel structures to reinforce interfacial properties of CFRPs composites, thus realizing hierarchical modulation of CFRPs interfaces.Highlights
A feasible strategy for constructing CF‐MXene multilevel structures is built.
The main methods for constructing CF‐MXene multilevel structures are provided.
Treatment processes and reinforcing mechanisms of CFRPs are evaluated.
Large‐Volume Injection and Assessment of Reference Standards for n‐Alkane δD and δ13C Analysis via Gas Chromatography Isotope Ratio Mass Spectrometry
Authors: Zander Paul D. , Rubach Florian , Martínez‐García Alfredo 
Published: November 2024

ABSTRACTRationaleCompound‐specific stable isotope analysis of hydrogen (δD) and carbon (δ13C) in organic compounds is a valuable tool in biogeochemical research. A key limitation of this method is the relatively large amount of sample required to achieve desirable precision.MethodsWe developed a large‐volume (20 μL) injection method that allows for high throughput analysis of less concentrated samples and tested it for δ13C and δD measurements of n‐alkanes. We also conducted a comparison of reference standards and assessed several methods to normalize and correct n‐alkane δD and δ13C measurements.ResultsThe mean precision of the δD method based on 233 environmental n‐alkane samples (two to three replications per sample) is 4.0‰ (1σ, estimated from the weighted mean of the pooled unbiased standard deviations) and 0.46‰ (1σ) for δ13C from 37 environmental samples (two to three replications per sample). The evaluation of reference standards shows that the use of n‐alkane standards with large offsets in δD values in adjacent n‐alkane chains can lead to biases in measurement correction.ConclusionsThe large‐volume injection method shows good reproducibility of δ13C and δD measurements of n‐alkanes and reduces the required sample concentration by about 80%. We propose that for δD measurements, a reference standard set should be used in which each reference standard has a limited range of δD values and no adjacent n‐alkane chains, to minimize memory effects.
Distributed Decision‐Making of General Linear Systems in Multi‐Coalition Games and Its Application to USV Swarm Confrontation
Authors: Yuwen Cheng , Han Jiaxin , Liu Xingyu , Zhen Ziyang 
Published: November 2024

ABSTRACTThis article explores a decision‐making problem with partial information in a multi‐coalition game that involves both cooperation and competition. Considering heterogeneous players with general linear systems, we propose a distributed algorithm that employs average consensus mechanisms to estimate the gradient of the coalition function among players within each coalition and utilizes leader‐following protocols to estimate the actions of all players across multiple coalitions. Furthermore, to reduce communication costs, a dynamic event‐triggered mechanism (ETM) is introduced into the average consensus and leader‐following protocols. The ETM is asynchronous, eliminating the requirement for a global clock and allowing players to transmit information only when the triggering condition is satisfied. By the Lyapunov analysis, all actions asymptotically converge to the Nash equilibrium by the proposed algorithms. Moreover, the unmanned surface vehicle (USV) swarm confrontation is formulated as a coalition game. In the scenario of safeguarding territorial integrity, we devise specific tasks for both the invading and defending USVs, encompassing elements such as formation, intrusion, defense, and so forth. The effectiveness of the proposed algorithms is validated through comprehensive simulations.
Discourses in disjointed streams: Dissecting SOGIE Equality Bill's legislative stalemate
Authors: Maningo Clyde A. 
Published: November 2024

AbstractThe Philippine SOGIE Equality Bill is the longest‐running series of Senate and House proposals filed in the Philippines. Despite academic efforts to analyze its intricacies, little is known about the discursive dimension of its agenda‐setting and the mechanisms behind its persistent deadlock, which exemplifies the phenomenon of policy stagnation. Through critical discourse analysis (CDA) and textual analysis, this study examines the statements of the legislative opposition. In doing so, it reifies Winkel–Leipold's approach to agenda‐setting, which reconceptualizes Kingdon's streams as discursive patterns. The study argues that the stalemate of the Bill is due to the disjunction in the political, policy, and problem streams that take reference from an entrenched socio‐culturally Abrahamic‐oriented landscape of the country, which actively shapes legislative outcomes of unconventional and progressive policies. Proponents may initially try to minimize potential conflicts by utilizing the normative power of such hegemonizing discourse to attain desired policy outcomes amidst existing discourse conditions. Analyzing the Bill's underlying discourses suggests that legal and socio‐cultural transformative change requires addressing overt and covert resistance in policy debates.
Carbon–Oxygen Radical Assisted Growth of Defect‐Free Graphene Films Using Low‐Temperature Chemical Vapor Deposition
Authors: Liu Haiyang , Li Yanglizhi , Wu Yangfan , Qin Dingkun , Qiu Xia , Wang Zhen , Zhou Qingyu , Yu Shuming , Li Qin , Li Haoxiang , Li Sheng , Yu Chaojie , Hu Yueming , Wang Shenxing , Chen Buhang , Song Xiaofeng , Qiang Jiawei , Zhou Lin , Li Yiwei , Xu Nan , Liu Mengxi , Yin Wanjian , Sun Xiaoli , Sun Luzhao , Liu Zhongfan 
Published: November 2024

AbstractLow‐temperature chemical vapor deposition growth of graphene films is a long‐term pursuit in the graphene synthesis field because of the low energy consumption, short heating‐cooling process and low wrinkle density of as‐obtained films. However, insufficient energy supply at low temperature (below 850 °C) usually leads to the difficulty in carbon source dissociation, graphene growth, and defect healing. Herein, a Carbon–Oxygen (C─O) radical assisted strategy is proposed for low‐temperature growth of defect‐free, wrinkle‐free, and single‐crystalline graphene films by using methanol precursor. We provide a deep insight into the growth process fueled by methanol precursor, unveiling the dissociation pathway of methanol and the roles of intermediate C─O radicals in carbon attaching and assembling to graphene lattice without defect formation. This method shows promising prospects in the cost‐effective production of high‐quality graphene films and provides inspiration for growing other 2D materials.
Multilevel and Flexible Physical Unclonable Functions for High‐End Leather Products or Packaging
Authors: Lyu Bin , Ouyang Yang , Gao Dangge , Wan Xuyang , Bao Xin 
Published: November 2024

AbstractCounterfeit and substandard high‐end leather products have inflicted substantial economic damage worldwide and have tarnished the reputation of the leather industry as a whole. Due to the limited security level, current anti‐counterfeiting measures are often vulnerable to attacks. Physically unclonable function (PUF) is regarded as the pinnacle of protection against counterfeiting. Leather, with a distinctive micro‐nano porous structure and random creasing patterns, serves as an ideal substrate for optical PUF. Here, a flexible and durable leather‐based optical PUF device is introduced that incorporates leather and fluorescent perovskite quantum dots. The fluorescence intensity distributed along the texture of leather offers parametric support for challenge‐response pairs. Combined with a self‐defined fluorescence pattern, the hierarchical authentication of optical PUF is realized. In conclusion, this innovation offers a desired opportunity for achieving high‐security anti‐counterfeiting and information traceability.
High Proton Conductivity of Acid Impregnated COFs Stabilized by Post‐Oxidation
Authors: Meng Chenxi , Zhao Yu , Zhu Weidong , Ben Teng 
Published: November 2024

AbstractThe investigation of proton conduction processes within artificial nanopores using phosphoric acid (H3PO4) and sulfuric acid (H2SO4) not only sheds light on the mechanisms of proton conduction for these strong acids in confined environments, while also provides critical insights into the proper understanding of biological transmembrane proton transport. However, the synthesis of stable and acid‐resistant host frameworks is yet a major challenges. By following that, the present study is conducted with the aim of improving the chemical stability of an imine‐based COF (CPOF‐10) by converting it into an amide‐linked COF (CPOF‐11) via a post‐oxidative approach. In which, the integration of an appropriate amount of imidazole groups into the framework facilitates the efficient impregnation of liquid proton‐conducting acids. The obtained results indicate the ten times greater proton conductivity of H3PO4@CPOF‐11 than that of H3PO4@CPOF‐10, thereby, successfully achieving 8.63 × 10−2 S cm−1 at 160 °C, under nitrogen (N2) atmosphere. Moreover, the highly stable CPOF‐11 tolerated H2SO4 doping, delivering a high proton conductivity of up to 1.70 × 10−1 S cm−1 at 140 °C, with a significantly low activation energy of 0.05 eV. To the best of the knowledge, this activation energy (0.05 eV) of H2SO4@CPOF‐11 is found to be one of the lowest value among all the reported proton‐conducting materials. Thus, this study will provide new understanding for the fabrication of advanced porous organic materials in fuel cells application.
Enhanced Stretchable 2D Metal‐Graphene Membranes with Superior Mechanical Properties for Sieving Lithium from Brine
Authors: Yang Yunchao , Gao Qifeng , Liang Wenbin , Zhang Xin , Qian Lijuan , Li Zhan , Chen Ximeng 
Published: November 2024

AbstractDesigning mechanically robust, 2D membranes with elastic properties is crucial for advancing separation technologies, particularly in demanding environments such as saline lakes. Here, an innovative approach, the synthesis of silver nanosheets within graphene oxide (GO) membranes to form a 2D silver‐graphene heterojunction, is introduced. This membrane exhibits exceptional mechanical strength (stress tolerance of 4.26 MPa and strain capacity of 123.03%), attributed to the reinforcing effect and ductility of silver nanosheets interacting synergistically with GO layers. Notably, the membrane demonstrates high selectivity for lithium ions in Salt Lake brine (Li⁺/Mg2⁺ ≈ 29.0, Na⁺/Mg2⁺ ≈ 183.3). Through dynamic stretching, the membrane enables precise modulation of ion permeability and selectivity, highlighting its versatility and practicality in complex separation processes. This study marks a significant advancement in membrane design, underscoring its potential in addressing challenges posed by diverse industrial applications, particularly in saline environments.
Self‐Powered Wearable Displacement Sensor for Continuous Respiratory Monitoring and Human‐Machine Synchronous Control
Authors: Shi Yan , Li Heran , Yang Liman , Wang Yixuan , Sun Zhibo , Zhang Chi , Fu Xianpeng , Niu Yanxia , Han Chengwei , Xie Fei 
Published: November 2024

AbstractFlexible wearable electronic devices play a vital role in daily monitoring, medical diagnosis, and human‐computer interaction, and such devices have a great demand for portability, integration, comfort, and self‐power. In this study, a triboelectric nanogenerator integrated into a flexible chest belt is proposed as a displacement sensor to monitor the displacement and frequency of thoracic expansion. Based on three parallel interpolation electrode structures with phase differences, the Triboelectric Nanogenerators's(TENG) output signal pulse number can characterize the sliding displacement, with a resolution of more than 1 mm and a durability of more than 700,000 cycles. Based on the flexible printed circuit processing technology, the volume of the sensor is less than 8.5 cm3, and the weight is less than 3.2 g, which improves the portability of the device. Based on wireless radio frequency technology, the collected signals are transmitted to the upper computer, and then the monitoring of respiratory physiological signals and the human‐machine synchronous control of the ventilator are achieved within the overshoot of 1.5% and the control error of 5% through a simulation machine. This work provides a sensing method for daily and medical respiratory monitoring and demonstrates the enormous potential of frictional electric sensors in intelligent medical applications.
Sodiophilic Interface and Electrolyte Regulation Boost the Lifespan of Anode‐Free Sodium Battery
Authors: Ji Huimin , Xie Chunlin , Zhang Rui , Wu Hao , Dai Jiawen , Li Sihan , Zhang Qi , Sun Dan , Tang Yougen , Wang Peiyu , Qiu Tian , Wang Haiyan 
Published: November 2024

ABSTRACTAnode‐free sodium batteries (AFSBs) have attracted increasing attention for their high energy density. However, they suffer from rapid capacity decline resulting from sodium dendrite growth at the sodium/host interface and irreversible side reactions at the electrolyte/sodium interface. Herein, a GaInSn‐coated Cu foil (G‐Cu), prepared by a simple brush coating method, was applied as the sodiophilic current collector to regulate sodium nucleation behavior. In addition, a nonexpendable functional electrolyte additive, hexamethyldisiloxane (HMDSO), was introduced, which could be absorbed on the sodium surface and serve as a protective layer against corrosion side reactions at the electrolyte/sodium interface. It is interesting to note that this additive barely participated in forming the solid electrolyte interphase. The synergetic effects of sodiophilic interface design and electrolyte regulation enable reversible sodium plating and stripping. Ultimately, the AFSB assembled using G‐Cu and HMDSO electrolyte with a highly loaded Na3V2(PO4)3 cathode (≈12.5 mg cm−2) delivers a discharge capacity of 84.5 mAh g−1 after 200 cycles with a high capacity retention of 87.6%, significantly extending its operation lifespan.
Envisioning the New Urban Informatics
Authors: Vainio Teija 
Published: November 2024

AbstractThis chapter envisions human implications of technology in cities, i.e., urban informatics, and focuses on related sustainability issues in technology design that particularly could influence citizens’ subjectively experienced security in urban environments. To date, much of the related urban informatics research contributes either to sustainability issues or security issues in the given context. In addition, sustainable technology design is quite often seen from the economic or environmental perspectives of sustainability and the challenges of secure technology, such as network stability and functionality. However, we argue here that these two phenomena, sustainability and citizen’s experienced security, are intertwined in the context of urban informatics. Thus, this chapter reviews the theoretical approaches and considerations of current urban informatics research related to sustainability and security issues from the citizen perspective. The outcome of this study reveals the gaps that have been unrecognized and discusses future research directions. The main contributions of this chapter are framing urban informatics into broader contexts of social sustainability and experienced security.
Climate Change: A Business Perspective of the Tourism Industry in the Seaflower Biosphere Reserve
Authors: Pedrozo Lorena Aldana , Stephens Rixcie Newball 
Published: November 2024

AbstractMass tourism in the Archipelago of San Andrés, Providencia, and Santa Catalina is depleting natural ecosystems, which are precisely the basis that supports the local economy. Since the establishment of the free port in the territory, the region’s development has been promoted without considering the loss of its environmental resources. However, after the islands were declared the Seaflower Biosphere Reserve in 2000, actions have been taken to counteract the situation, envisioning a more environmentally friendly productive performance that provides the income necessary to guarantee the well-being and quality of life of islanders. Despite this, intensive economic activities prevail in the department, showing that the path towards sustainability under these conditions is difficult to achieve. Climate change has highlighted the importance of finding sustainable alternatives for islands. In this case, it is necessary to discourage conventional means that threaten the biodiversity of the territory and to promote business schemes that are more environmentally respectful. This will be possible through the strengthening of governance in the Biosphere Reserve and its coordination with different interest groups. In this article we estimate the relevance of the topic for the most important industry in the territory—tourism—to provide key elements for this discussion.
Advances and Needs in Marine Science Research in the Archipelago of San Andrés, Providencia, and Santa Catalina: A Literature Analysis
Authors: García Camilo B. , Villarraga Johan Sebastián 
Published: November 2024

AbstractA searchable database of marine science bibliographic references relating to the Archipelago of San Andrés, Providencia, and Santa Catalina is presented. A total of 422 documents were located, including scientific articles, books and book chapters, and thesis works, plus 103 internal technical reports. The database is used to formulate a diagnosis of advances and needs in marine science research in the archipelago. Despite having received the most attention, the species inventory is not complete and is biased toward certain groups. The biology of most species is poorly known, as well as their interactions. Static aspects like the co-occurrence of species in a certain time period predominate, while dynamic aspects including responses to climate change have been barely touched upon. Hence, there is a wide scope and need for new and modern initiatives in marine science research for the archipelago.
A Light Pollution Assessment in the Fringing Reefs of San Andrés Island: Towards Reducing Stressful Conditions at Impacted Coral Reefs
Authors: Chilma-Arias Andres , Giraldo-Vaca Sebastian , Sánchez Juan A. 
Published: November 2024

AbstractThe degradation of the night sky’s quality due to artificial light sources negatively affects marine environments, because many organisms use natural light as cues for reproductive and dispersal behaviors, find favorable habitats, and for the biochemistry of their symbiotic microorganisms. Despite the tremendous effect on marine life, measuring the effects of artificial light pollution is difficult because our understanding of natural light brightness coming from celestial bodies like the Moon is minimal. Here, we fill this gap by quantifying the sky’s brightness and Artificial Light Pollution at Night (ALAN). This study assessed light pollution along the reefs around San Andrés Island, which Hurricane Iota significantly impacted. We modified and installed Sky Quality Meters (LU-DL) at both leeward and fringing reefs, down to 11 m depth. The results indicate the highest ALAN values in the area of Johnny Cay (18 msas) compared to Acuario (20 msas) and West View (21 msas). Additionally, National Oceanic and Atmospheric Administration NOAA and Unihedron databases show an increase in artificial light on land, where constant artificial light and coastal vegetation loss due to Hurricane Iota (between 15 and 19th November 2020), are the main factors that may be generating this increase in artificial light.
The cosmological impact of Brane-Chern-Simons massive gravity
Authors: Kazempour S. , Akbarieh A. R. 
Published: November 2024

Abstract
In this paper, we present a novel extension of massive gravity theory; the Brane-Chern-Simons massive gravity theory. We explore the cosmological implications of this theory by deriving the background equations and demonstrating the existence of self-accelerating solutions. Interestingly, our theory suggests the existence of self-accelerating mechanisms that originate from an effective cosmological constant, leading to intriguing possibilities for understanding the nature of cosmic acceleration. Furthermore, we perform a tensor perturbation analysis to investigate the propagation of gravitational waves in this framework. We derive the dispersion relation for gravitational waves and study their behavior in the Friedmann-Lemaître-Robertson-Walker cosmology within the context of Brane-Chern-Simons massive gravity.