bluuebunny/crossref_metadata_2025_split huggingface dataset:
Skin‐Inspired, Multifunctional, and 3D‐Printable Flexible Sensor Based on Triple‐Responsive Hydrogel for Signal Conversion in Skin Interface Electronics Health Management
Authors: Zheng Shuhuai , Ruan Lingyang , Meng Fanmao , Wu Zhihong , Qi Yiyao , Gao Yukui , Yuan Weizhong 
Published: December 2024

AbstractHydrogel‐based flexible electronic components have become the optimal solution to address the rigidity problem of traditional electronics in health management. In this study, a multipurpose hydrogel is introduced, which is formed by combining a dual‐network consisting of physical (chitosan, polyvinyl alcohol (PVA)) and chemical (poly(isopropyl acrylamide (NIPAM)‐co‐acrylamide (AM))) cross‐linking, along with signal conversion fillers (eutectic gallium indium (EGaIn), Ti3C2 MXene, polyaniline (PANI)) for responding to external stimuli. Multiple sensing of dynamic and static signals is permissible for it. The strain sensor based on the hydrogel exhibits up to a 1000% resistance change within a 400% stretch range, and significant capacitance variations are observed upon touch. The temperature sensor yields a sensitivity of ≈−2.9% °C−1 at 20–40 °C and ≈65% °C−1 at 0–20 °C. The pH sensor responds with a sensitivity of near −13.68 mV pH−1. A paper‐based triboelectric nanogenerator can be assembled to collect action energy at 83 mW m−2. The skin contact interface is kept in good condition owing to its 3D‐printability, controllable antibacterial properties, along high cell survival rate. This multifunctional hydrogel holds promise in facilitating the integration of diagnosis and maintenance.
Carrier Recirculation Induced Ultrasensitive Photodetectors of InSe/CdTe Heterostructure Featuring an Interfacial Holes Layer
Authors: Zhao Xuefeng , Zhao Dongyang , Hu Tao , Cao Hechun , Jia Yu , Chen Yan , Wang Xudong , Yang Jing , Zhang Yuanyuan , Tang Xiaodong , Bai Wei , Wang Jianlu , Chu Junhao 
Published: December 2024

AbstractPhotodetectors (PDs) based on mix‐dimensional heterojunctions (MDHJs) built from 2D layered materials and covalent‐bonded semiconductors show the prospect of compensating the intrinsic weakness of 2D materials to realize their full potential. However, there is an open issue to improve the temporal response of PDs while maintaining high gain and sensitivity. Herein, photoconductive type MDHJs PDs with 2D InSe and covalent‐bonded CdTe thin film are designed and fabricated in which InSe is the active layer and CdTe is the medium gain one. The conductivity of InSe is improved by exceeding 50 times led by the formation of p–p heterojunction because of that an interfacial hole accumulation at InSe side and a built‐in field at CdTe one are formed. Benefiting from the synergistic function of photoconductive and photogating effects, carrier recirculation induced responsitivity, detectivity, and external quantum efficiency with orders of magnitude increment reach 4.31 × 104 AW−1, 7.55 × 1013 Jones and 1.01 × 107%, and more optimal response time than those of other InSe PDs is demonstrated. This device construction strategy with exceptional performance hints at the prospect of optoelectronic devices of 2D InSe.
Loosening the Solvation Cage in Polysaccharide Polymer Electrolyte for Sustainable Lithium Metal Batteries
Authors: Sheng Ouwei , Jin Tenglong , Wang Tianyu , Yang Tao , Han Qingyue , Tao Xinyong , Jin Chengbin 
Published: December 2024

AbstractBiomass with naturally ion‐conducting segments (e.g., hydroxyl) holds promise for sustainable batteries. Several expeditions are proposed to successfully enhance the ion conduction in biomass polymer mainly by intermolecular structure regulation. Presently, the recognition and research of biomass polymer electrolytes are still limited, requiring continuous explorations to promote the application of such promising electrolytes. Herein, a molecularly asymmetric electrolyte is produced, comprising polysaccharides of starch and chitosan. The strong Li+−O (hydroxyl) interactions are replaced by weak Li+−oxygen (O) of ester carbonyl, and the steric hindrance group −NH3+ promotes the immobilization of anion and stabilization of the interface. Such intermolecular chemical modulations of biomass are achieved by a one‐pot esterification and protonation of polysaccharides. A loosely‐solvating cage structure with the participation of O of ester carbonyl, glycerol, and anion, allowing the rapid conduction (1.82 × 10−4 S cm−1 at 30 °C) and a high migration number (0.49) of Li+. Moreover, Li symmetric cells (2500 h) and Li4TiO5 | Li cells (400 cycles) employing the SCA electrolyte show superior cycling stability. The polysaccharide BPEs and solvation regulation strategy open up a promising avenue for constructing sustainable batteries.
A Review on MXene/Nanocellulose Composites: Toward Wearable Multifunctional Electromagnetic Interference Shielding Application
Authors: Li Yuhong , Wang Yang , Huang Yi 
Published: December 2024

AbstractWith the rapid development of mobile communication technology and wearable electronic devices, the electromagnetic radiation generated by high‐frequency information exchange inevitably threatens human health, so high‐performance wearable electromagnetic interference (EMI) shielding materials are urgently needed. The 2D nanomaterial MXene exhibits superior EMI shielding performance owing to its high conductivity, however, its mechanical properties are limited due to the high porosity between MXene nanosheets. In recent years, it has been reported that by introducing natural nanocellulose as an organic framework, the EMI shielding and mechanical properties of MXene/nanocellulose composites can be synergically improved, which are expected to be widely used in wearable multifunctional shielding devices. In this review, the electromagnetic wave (EMW) attenuation mechanism of EMI shielding materials is briefly introduced, and the latest progress of MXene/nanocellulose composites in wearable multifunctional EMI shielding applications is comprehensively reviewed, wherein the advantages and disadvantages of different preparation methods and various types of composites are summarized. Finally, the challenges and perspectives are discussed, regarding the performance improvement, the performance control mechanism, and the large‐scale production of MXene/nanocellulose composites. This review can provide guidance on the design of flexible MXene/nanocellulose composites for multifunctional electromagnetic protection applications in the future intelligent wearable field.
High‐Performance Sunlight‐Induced Polymerized Hydrogels and Applications in 3D and 4D Printing
Authors: Feng Ji , Liu Zheng , Gao Tong , Gigmes Didier , Morlet‐Savary Fabrice , Schmitt Michael , Dietlin Celine , Petithory Tatiana , Pieuchot Laurent , Zhang Jing , Shan Wenpeng , Xiao Pu , Dumur Frédéric , Lalevée Jacques 
Published: December 2024

AbstractCurrently, there are only few reports on water‐soluble photoinitiating systems. In this study, a highly water‐soluble organic dye i.e. sodium (E)‐3,3′‐((4‐(2‐(3‐methylbenzo[d]thiazol‐3‐ium‐2‐yl)vinyl)phenyl)azanediyl)dipropionate iodide, was synthesized and served as a photoinitiator. Notably, this water‐soluble initiator, at a low concentration of just 0.01 wt%, demonstrates a high photoinitiation ability, with some hydrogel formulations achieving nearly 100% double bond conversion under sunlight. Photopolymerization kinetics were monitored using Real‐Time Fourier Transform Infrared. To explore the complex chemical principles of radical polymerization, UV‐visible absorption and fluorescence spectroscopy, steady‐state photolysis, fluorescence quenching experiments and cyclic voltammetry were employed to gain a comprehensive understanding of the photochemical mechanism involved. Additionally, several characteristics of the synthesized hydrogels were also investigated i.e. the water content, the water swelling, and the volume swelling. In addition to their excellent photoinitiation capabilities, the hydrogel formulations developed in this study also supported 3D printing. 3D objects with smooth surface and a high spatial resolution could be successfully printed using direct laser writing. The fabricated hydrogels could reversibly change of shape in response to water (adding or removing water), enabling successful 4D printing behavior. Furthermore, the efficient photoinitiation ability of the water‐soluble formulations opens new avenues for sunlight‐polymerized hydrogels and potential applications in bioprinting.
Advancing Software Project Effort Estimation: Leveraging a NIVIM for Enhanced Preprocessing
Authors: Sarmad Ali Syed , Ren Jian , Wu Ji , Zhang Kui , Chao Liu 
Published: December 2024

ABSTRACTSoftware development effort estimation (SDEE) is essential for effective project planning and relies heavily on data quality affected by incomplete datasets. Missing data (MD) are a prevalent problem in machine learning, yet many models treat it arbitrarily despite its significance. Inadequate handling of MD may introduce bias into the induced knowledge. It can be challenging to choose optimal imputation approaches for software development projects. This article presents a novel incomplete value imputation model (NIVIM) that uses a variational autoencoder (VAE) for imputation and synthetic data. By combining contextual and resemblance components, our approach creates an SDEE dataset and improves the data quality using contextual imputation. The key feature of the proposed model is its applicability to a wide variety of datasets as a preprocessing unit. Comparative evaluations demonstrate that NIVIM outperforms existing models such as VAE, generative adversarial imputation network (GAIN), ‐nearest neighbor (K‐NN), and multivariate imputation by chained equations (MICE). Our proposed model NIVIM produces statistically substantial improvements on six benchmark datasets, that is, ISBSG, Albrecht, COCOMO81, Desharnais, NASA, and UCP, with an average improvement in RMSE of 11.05% to 17.72% and MAE of 9.62% to 21.96%.
Cyanogroup‐Modified PEO‐Based Electrolytes Achieve High Free Al3+ Concentration and Improve the Transport Dynamics in Solid‐State Aluminum‐Ion Batteries
Authors: Pan Hongquan , Sun Qiwen , Zhang Wenming , Li Zhanyu 
Published: December 2024

AbstractPolymer‐based solid electrolyte boasting ultra‐high safety, energy density, mechanical strength and flexibility, attracting much attention in the field of battery applications. However, its widespread application is hindered by the low conductivity, insufficient aluminium salt dissociation, high crystallization degree, short service life, etc. To solve the above problems, a composite solid polymer electrolyte (SPE) design based on polyethylene oxide (PEO, Mw = 6 000 000) with AlCl3·6H2O as aluminum salt and butanedinitrile (SN) as plasticizer is proposed in this paper. The disorder and mobility of the PEO chains, conductivity, degree of aluminum salt dissociation, and service life are enhanced by the addition of plasticizer SN. Theoretical calculation demonstrates the formation of solvated sheath‐like structure [SN…Al3+] has strong interactions with the polymer PEO, allowing rapid transport of Al3+ through the polymer segments. These results are also further verified by subsequent tests, which can reveal the Al3+ transport mechanism of room‐temperature SPEs in a more reasonable way. Meanwhile, the relatively strong binding energy between PEO and SN can help to avoid the parasitic reaction between SN and Al, increase the service life of solid‐state aluminium‐ion batteries. Providing a promising solution for the design of solid‐state battery electrolytes that can be applied at room temperature.
The Sweet Spirits of the Mineral Acids: Diethyl Ether, Ethyl Nitrite, and Chloroethane. Late Medieval‐Early Modern Organic Chemistry
Authors: Wentrup Curt 
Published: December 2024

AbstractThe “sweet spirits” of sulfuric, nitric, and hydrochloric acids, viz. diethyl ether, ethyl nitrite, and chloroethane, have a history dating back to the late Middle Ages. The compound variously known as philosophorum spiritus vini, aqua Lulliana, Paracelsus’ Schwefel süss, Cordus’ dulce Vitrioli oleum, and Frobenius’ æther is identical with diethyl ether. The spiritus nitri dulcis was discovered by Glauber, although it was first described clearly by Kunckel. It is largely ethyl nitrite. Spiritus salis dulci was discovered by Paracelsus and is identical with chloroethane. The historical preparations of the mineral acids as well as their sweet spirits obtained by reaction with ethanol are described in detail with particular emphasis on the experimental methods and the pyrolysis/distillation apparati used. These preparations of derivatives of ethanol are among the earliest examples of organic synthesis, although the true nature of the compounds was not recognized until the 19th century.
Prestressed and prepolarized piezoelectric material with an elliptical hole
Authors: Craciun Eduard-Marius , Ghita Gilbert-Marius-Daniel , Rapeanu Eleonora 
Published: December 2024

Abstract
In this paper, the antiplane state problem of an elliptic hole in a prestressed and prepolarized piezoelectric material loaded by constant, uniform remote shear stresses was performed. A compact and elementary form solution of the problem is obtained utilizing the conformal mapping technique and representation of the incremental stress and electrical fields by complex potentials. Using the boundary conditions, the coefficients of complex potentials developed as Laurent series, for the case of a piezoelectric material of class

$$\bar{4}2m$$

4

¯

2
m

, and implicitly the components of incremental stress and electric displacement fields are obtained in a final compact and closed form.
Evaluating mixing methods for FFF-printed PLA-HA composites: Towards high-performance composites and advancements in additive manufacturing
Authors: Sardar Muhammad Zaryyab , Gide Kunal Manoj , Stuart Alexander , Rostobaya Violetta , Zarrabinia Kian , Beheshti Ali , Bagheri Shaghayegh 
Published: December 2024

AbstractAdditive manufacturing, particularly fused filament fabrication (FFF), enables the creation of polymer composites with precisely controlled mechanical properties. This control depends heavily on the mixing method during filament fabrication, which significantly impacts how reinforcing elements are distributed within the material. Despite its importance, a critical knowledge gap exists regarding how different mixing methods affect the mechanical properties of FFF-printed composites. This study evaluates three mixing methods—magnetic stirring (MS), wet speed mix (WSM), and dry speed mix (DSM) for polylactic acid-hydroxyapatite (PLA-HA) composites printed using the FFF method. The fabricated composites were assessed for mechanical properties using micro-indentation and isostatic compression tests, as well as topography and elemental composition via scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), respectively. Micro-indentation revealed the highest elastic modulus, indentation hardness, and creep resistance for DSM samples. Isostatic compression tests also corroborated these findings, with DSM leading to higher modulus of elasticity, modulus of resilience, absorbed plastic energy, and achievable compressive stress. EDS analysis confirmed the presence of HA particles within the PLA matrix for all three sample types. Among these three widely used mixing procedures, the findings of this study suggest that the DSM mixing method holds promise for fabricating high-performance FFF-printed polymer composites. While this study is limited to PLA-HA composites, the approach may offer a pathway for exploring its application to other ceramic-reinforced polymer composites in future research.
Two-way random effects model with serial correlation
Authors: Baltagi Badi H. , Bresson Georges , Etienne Jean-Michel 
Published: December 2024

AbstractThis paper derives a feasible GLS estimator for a two-way error component model with serial correlation on both the time effects as well as the remainder disturbances. This estimator is based on two methods, one proposed by De Porres and Krishnaku mar(2013) for deriving the spectral decomposition of a general error component structure and the other based on an inversion trick for the variance-covariance matrix of this model suggested by Skoglund and Karlsson (2001). While the last paper used maximum likelihood methods under the normality assumption, we use method of moments estimators following Baltagi and Li (1991) for the one-way error component model with serially correlated remainder disturbances and its extension by Brou et al. (2011) for the two-way model with serially correlated time effects as well as remainder disturbances. Monte Carlo simulations are performed to compare the performance of these two estimators as well as a bias correction version based on Nobach (2023). Our results find that the method based on the (Skoglund and Karlsson 2001) inverse that is bias corrected a la (Nobach 2023) performs the best in root mean square error (RMSE) as well as mean absolute percentage error (MAPE) and is recommended.
Bilinear control of semilinear elliptic PDEs: convergence of a semismooth Newton method
Authors: Casas Eduardo , Chrysafinos Konstantinos , Mateos Mariano 
Published: December 2024

Abstract
In this paper, we carry out the analysis of the semismooth Newton method for control-constrained bilinear control problems of semilinear elliptic PDEs. We prove existence, uniqueness and regularity for the solution of the state equation, as well as differentiability properties of the control to state mapping. Then, first and second order optimality conditions are obtained. Finally, we prove the superlinear convergence of the semismooth Newton method to local solutions satisfying no-gap second order sufficient optimality conditions as well as a strict complementarity condition.
Language aptitude is related to the anatomy of the transverse temporal gyri
Authors: Ramoser Carmen , Fischer Aileen , Caspers Johanneke , Schiller Niels O. , Golestani Narly , Kepinska Olga 
Published: December 2024

Abstract
Why is it that some people seem to learn new languages faster and more easily than others? The present study investigates the neuroanatomical basis of language learning aptitude, with a focus on the multiplication pattern of the transverse temporal gyrus/gyri (TTG/TTGs) of the auditory cortex. The size and multiplication pattern of the first TTG (i.e., Heschl’s gyrus; HG) and of additional posterior TTGs, when present, are highly variable both between brain hemispheres and individuals. Previous work has shown the multiplication pattern of the TTGs to be related to musical and linguistic abilities. Specifically, one study found that high language learning aptitude correlated with more TTGs in the right hemisphere, even though language functions are generally left-lateralized. In this study, we used the recently developed TASH (Toolbox for the Automated Segmentation of Heschl’s Gyrus) and MCAI (Multivariate Concavity Amplitude Index) toolboxes to automatically extract structural (e.g., cortical volume, surface area, thickness) and multiplication pattern measures of the TTGs from 82 MRI scans, and related them to participants’ language aptitude scores. In contrast to previous results, we found that higher language aptitude was related to fewer TTGs in the right hemisphere and to greater surface area of the first right TTG and of the second left TTG. Furthermore, more languages learned in life were associated with higher language learning aptitude, opening up questions about the structure–function relationship of the TTGs and language learning, and about how language aptitude and language learning are related.
The nitrogenase mechanism: new roles for the dangler?
Authors: Warmack Rebeccah A. , Rees Douglas C. 
Published: December 2024

AbstractDangler sites protruding from a core metallocluster were introduced into the bioinorganic lexicon in 2000 by R.D. Britt and co-workers in an analysis of the tetramanganese oxygen-evolving cluster in photosystem II. In this perspective, we consider whether analogous dangler sites could participate in the mechanism of dinitrogen reduction by nitrogenase. Two possible roles for dynamic danglers in the active site FeMo cofactor are highlighted that might occur transiently during turnover. The first role for a dangler involves the S2B belt sulfur associated with displacement by carbon monoxide and other ligands, while the second dangler role could involve the entire cluster upon displacement of the His- $\alpha$
α
442 side chain to the molybdenum by a free carboxyl group of the homocitrate ligand. To assess whether waters might be able to interact with the cofactor, a survey of small ligands (water and alkali metal ions) contacting [4Fe4S] clusters in synthetic compounds and proteins was conducted. This survey reveals a preference for these sites to pack over the centers of 2Fe2S rhombs. Waters are excluded from the S2B site in the resting state of nitrogenase, suggesting it is unlikely that water molecules coordinate to the FeMo cofactor during catalysis. While alkali metal ions are found to generally influence the properties of catalysts for dinitrogen reduction, no convincing evidence was found that any of the waters near the FeMo cofactor could instead be sodium or potassium ions. Dangler sites, if they exist in the nitrogenase mechanism, are likely formed transiently by localized changes to the resting-state FeMo cofactor structure.
Graphical abstract
Analysing medical waste transportation using periodic vehicle routing problem for Surabaya public health facilities
Authors: Anityasari Maria , Rinardi Hilmi Cahya , Warmadewanthi I. D. A. A. 
Published: December 2024

AbstractMedical waste management is crucial in densely populated urban areas of developing nations. The disposal of biohazardous medical waste requires strict monitoring due to potential environmental and public health risks. In developing countries, several constraints present as challenges to medical waste disposal, including inaccessible biohazardous disposal plants, limited in-facility biohazardous waste storage, government regulation, and cost. Surabaya, Indonesia’s second-largest city, experiences these challenges. Currently, the Surabaya Health Department (SHD) relies on third-party waste processing vendors to handle infectious waste from 63 health facilities due to hazardous waste disposal only being permitted at the provincial level. In addition, waste collection occurs monthly for most health facilities, with a regulated 14-day storage period to prevent accumulation which contradicts the minimum 25-kg threshold that third-party vendors implement. This study utilizes Surabaya’s context to develop an effective medical waste disposal and transportation strategy and logistics using the Periodic Vehicle Routing Problem (PVRP). Results indicate that the 14-day storage requirement benefits SHD and vendors, improving operational efficiency and mitigating risks. Compliance with storage regulations reduces travel distances compared to scenarios without storage requirements. This study’s methodology applies to developing countries exhibiting similar constraints and acts as a guideline to develop similar medical waste disposal strategies.