bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three‐dimensional lightweight metamaterial with ultra‐wideband microwave absorption
Authors: Yang Yifan , Zhao Wenbo , Wu Zonghuan , Zhao Junming , Jiang Tian , Chen Ke , Feng Yijun 
Published: January 2022

AbstractA three‐dimensional lightweight metamaterial (MM) with ultra‐wideband microwave absorption is proposed in this paper. Based on the concept of MMs, periodically arranged resistive films are introduced into the standing frame to form a standing lossy structure, which can introduce electric resonances in the gap between adjacent sub‐wavelength unit cells at lower frequencies. Several standing wave modes are also excited in the standing lossy structure at higher frequencies, resulting in an ultra‐wideband absorption for electromagnetic waves. The full‐wave simulation demonstrates that the MM can absorb over 90% of the incident wave energy in the range 1.46–40 GHz, with a relative bandwidth of 185.9%. The experimentally measured results correspond to the simulated results across the entire frequency range. In addition, the proposed MM is lightweight, easy to fabricate.
Event‐recurring multiband SWIFT functional MRI with 200‐ms temporal resolution during deep brain stimulation and isoflurane‐induced burst suppression in rat
Authors: Paasonen Ekaterina , Paasonen Jaakko , Lehto Lauri J. , Pirttimäki Tiina , Laakso Hanne , Wu Lin , Ma Jun , Idiyatullin Djaudat , Tanila Heikki , Mangia Silvia , Michaeli Shalom , Gröhn Olli 
Published: January 2022

PurposeTo develop a high temporal resolution functional MRI method for tracking repeating events in the brain.MethodsWe developed a novel functional MRI method using multiband sweep imaging with Fourier transformation (SWIFT), termed event‐recurring SWIFT (EVER‐SWIFT). The method is able to image similar repeating events with subsecond temporal resolution. Here, we demonstrate the use of EVER‐SWIFT for detecting functional MRI responses during deep brain stimulation of the medial septal nucleus and during spontaneous isoflurane‐induced burst suppression in the rat brain at 9.4 T with 200‐ms temporal resolution.ResultsThe EVER‐SWIFT approach showed that the shapes and time‐to‐peak values of the response curves to deep brain stimulation significantly differed between downstream brain regions connected to the medial septal nucleus, resembling findings obtained with traditional 2‐second temporal resolution. In contrast, EVER‐SWIFT allowed for detailed temporal measurement of a spontaneous isoflurane‐induced bursting activity pattern, which was not achieved with traditional temporal resolution.ConclusionThe EVER‐SWIFT technique enables subsecond 3D imaging of both stimulated and spontaneously recurring brain activities, and thus holds great potential for studying the mechanisms of neuromodulation and spontaneous brain activity.
An exploration of clinical variables that enhance therapeutic alliance in patients seeking care for musculoskeletal pain: A mixed methods approach
Authors: Myers Christina , Thompson Glenn , Hughey Lindsey , Young Jodi L. , Rhon Daniel I. , Rentmeester Casey 
Published: January 2022

AbstractIntroduction/ObjectivesTherapeutic alliance (TA) is an integral part of building a patient and clinician relationship. TA begins at the initial encounter; however, the specific TA behavioural practices that are most impactful and linked to pain reduction and improved function remain unclear. The primary objective of this study was to explore physical therapist behaviours and interactions during the initial physical therapy evaluation and how they related to the patient's perception of TA. A secondary objective was to explore the relationship between TA, pain intensity, and function.MethodsA mixed methods study was conducted. Pain intensity, TA and self‐reported function were assessed at three time points. Spearman's Rho (ρ) was used to quantify if there was an association between increased TA and function and reduced pain intensity, while a checklist of TA themes and behavioural practices was used for the qualitative analysis.ResultsThere was a statistically significant negative correlation between patient‐perceived TA and pain intensity immediately after the initial evaluation (ρ = −0.39 [p = 0.048]). Behavioural practices associated with higher TA included information gathering, pausing to listen, using humour and transitions, and use of clarifying questions. Behavioural practices associated with patient‐perceived lower TA interactions were lack of touch, the absence of pain neuroscience education, and not restating what the patient said during the interview.ConclusionThis study highlights a relationship between TA and reduction of pain intensity after the initial evaluation and identifies key behavioural practices that could positively and negatively impact TA during the clinical encounter.
Satisfaction with the quality of nursing care among older adults during acute hospitalization in Ghana
Authors: Fuseini Abdul‐Ganiyu , Bayi Rahinatu , Alhassan Afizu , Atomlana Joseph Aniba 
Published: January 2022

AbstractAimThis study assessed the level of satisfaction with the quality of nursing care among hospitalized older adults and the factors associated with it.DesignThis was a quantitative descriptive cross‐sectional survey.MethodsWe used a validated questionnaire to collect data from a convenience sample of 206 older adults from three government hospitals in Tamale, Ghana. Data were analysed using descriptive statistics, independent sample t test and one‐way ANOVA.ResultsMost of the participants (72.3%) reported moderate levels of satisfaction with the quality of nursing care, while 23.8% reported high levels of satisfaction. The association between gender, religion and level of satisfaction with nursing care was not statistically significant. However, patients differed on levels of satisfaction based on healthcare facility: patients at the Tamale Central Hospital were more satisfied with the quality of nursing care than those at the Tamale Teaching Hospital. There is a need for capacity building and sensitization workshops on the rudiments of geriatric care for nurses in the metropolis to serve as an impetus for improvement in the quality of care.
Nanomechanical behavior of hierarchical self‐assemblies of perylene bisimide derivatives
Authors: Wang Weijie , Yao Qing , Sun Abin , Wang Wenpin 
Published: January 2022

AbstractIn the field of self‐assemblies of perylene bisimide (PBI) derivatives, effect of molecular structure on the mechanical properties of assemblies is essential but still not understood in full detail. To reveal the relationships of PBI molecules and mechanical properties of their assemblies, the PeakForce Quantitative Nanomechanical Mapping (PeakForce QNM) is applied to visualize the structures and quantify the mechanical properties of assemblies formed by the model PBI derivatives (M1: C6H13‐PBI‐OH; M2: C12H25‐PBI‐OH). The influence of the linear alkyl chainson self‐assembly of PBI derivatives has been investigated. We found that the long‐range ordered structures could be formed for both M1 and M2 in high‐polarity solvents. M1 formed the micron‐size bricks with the Young's modulus of (3.1 ± 1.0) GPa, whereas M2 assembled into the nanosheets with the Young's modulus of (2.5 ± 0.5) GPa. The competitive, non‐competitive and cooperative interactions of the π–π stacking, hydrogen‐bond interactions, and van der Waals interactions facilitated the growth of assemblies with the different hardness and size. This method can be used to investigate the molecular self‐assembly, which helps to establish relationships among structure, performance, and corresponding application of assemblies.
The preparation of polyamide 11 composites with extremely long ignition time
Authors: Jin Xiaodong , Cui Suping , Sun Shibing , Sun Jun , Zhang Sheng , Tang Wufei , Bourbigot Serge 
Published: January 2022

AbstractThe wildly‐used charring agent, pentaerythritol (PER), was solely incorporated into polyamide 11 (PA 11) matrix by melt compounding. The addition of 15%PER improved the UL rating of PA 11‐PER composites to V‐0 and reduced the peak heat release rate by 22.1%. Most importantly, the time to ignition had been incredibly increased from 93 s of neat PA 11 to 193 s of PA 11‐15PER sample. The thermal behaviors were investigated by thermogravimetric analysis (TGA) and TGA‐Fourier transform infrared (FTIR). The morphology, chemical structure and physical properties (such as crystallinity and viscosity) of char residues that were collected at ignition point or after MLC tests of PA 11 and PA 11‐15PER composites were fully demonstrated. It was suggested that the interactions between PA 11 and PER led to the rapid formation of a compact char layer which exhibited sufficient viscosity before ignition in the condensed phase, while the early released H2O and CO2from PER took effects in the gas phase.
In‐line residual strain monitoring for thermoplastic automated tape layup using fiber Bragg grating sensors
Authors: Yadav Neha , Wachtarczyk Karol , Gąsior Paweł , Schledjewski Ralf , Kaleta Jerzy 
Published: January 2022

AbstractAutomated tape layup (ATL) has been used extensively for manufacturing composites laminates using unidirectional prepregs for high‐performance industries like aerospace. Residual stress is one of the defects that adversely affect the layup quality. These stresses affect geometrical tolerances in the form of distortion of the final product and are found to have a detrimental impact on the mechanical properties. In‐line monitoring of such defects will help in productivity increase and achieving a reliable process control. The aim of the present work is to demonstrate the feasibility of fiber Bragg grating sensors for monitoring residual strains. FBGs are embedded inside a thermoplastic UD laminate. Temperature and strain discrimination is performed to recognize intermittent residual strains during the layup. Finally, intermittent residual strain is used to develop an understanding of the global residual strain. Effect of selective process parameter on residual stress formation and the evolution of the same is also analyzed.
The spatiotemporal characteristics of N170s for faces and words: A meta‐analysis study
Authors: Nan Weizhi , Liu Yuqi , Zeng Xianqing , Yang Weibin , Liang Junhua , Lan Yonglong , Fu Shimin 
Published: January 2022

AbstractN170 is a negative event‐related potential (ERP) component in response to visual stimuli, such as faces. It remains controversial whether N170 reflects the specific processing of faces or can also be elicited by objects of expertise (e.g., words). In this research, we conducted a meta‐analysis for the spatiotemporal characteristics of N170 of face and word stimuli from 24 studies in which both stimuli were presented for each subject. We observed that (1) both face and word stimuli can elicit conspicuous N170s and that there was no difference between the amplitude of face‐N170 and word‐N170; (2) there is no difference in the latencies between the two N170s; and (3) both N170s are distributed in the occipitotemporal regions but with a reversed hemispheric distribution pattern—face‐N170 is more negative in the right than left occipitotemporal regions, while word‐N170 is the opposite. These results showed that the face‐ and word‐N170s are qualitatively the same but have different hemispheric lateralization advantages—N170 might be a general neural index of the expertise‐dependent object‐recognition process in occipitotemporal regions.
Can extroversion congruence promote online interaction? Evidence from college first‐year students
Authors: Wang Kexin , Chen Shuang , Zhang Jianxin , Deng Yang , Zhang Zheng , Zhou Mingjie 
Published: January 2022

AbstractBuilding a new social network (SNS) with connections is especially important for first‐year students to deal with the transition to college. The goal of the current study was to investigate the link between congruence in extroversion and the interaction frequency within cross‐sex classmate dyads on SNS. Based on a cross‐sectional study among 371 cross‐sex first‐year students dyads (Mage = 18; SD = 2.08) using polynomial regression with response surface analysis, we found that: (i) dyads with congruent levels of extroversion indeed interacted more frequently online than dyads with incongruent levels of extroversion; (ii) extroverted dyads interacted more frequently online than introverted dyads; and (iii) dyads with an increased level of incongruence on extroversion had a decreased frequency of online interaction. The sex‐segregated social network might be magnified by the difference in extroversion within cross‐sex dyads. The discussion focused on potential explanations from the reward of interaction model and the expectations for cross‐sex friendship.
Measurement of material degradation in dependence of shear rate, temperature, and residence time
Authors: Schall Christoph , Schöppner Volker 
Published: January 2022

AbstractDuring processing, plastics are frequently exposed to high stresses. These include, above all, shear and temperature within the scope of the residence time of the manufacturing process in order to achieve a homogeneous plastic melt for further processing. The stress of the manufacturing process can lead to molecular degradation, which can have a negative effect on the product properties. Since it makes sense to take molecular degradation into account for many processes, a test stand for material characterization was designed and a regression equation was derived for the mathematical description of the degradation behavior. With the help of this regression equation, a prediction of the expected material degradation can be made, provided that the shear rate, the temperature and the associated residence time are known.
Fabrication of hierarchical porous polymer particles via blending strategy of water and polymer mixture
Authors: Wang Bin , Li Tian , Guo Wenling , Cao Peng , Wang Rongmin , Song Pengfei , He Yufeng , Li Yonggang 
Published: January 2022

AbstractHierarchical porous polymer particles (HPPPs) from the assembly of polymer chains have attracted increasing interest because of their prospective applications in drug delivery and catalysis. This work utilized a blending strategy of polymer mixture in mixed solvents to fabricate HPPPs with adjustable pore structures. Firstly, using methacrylic acid (MAA) and methyl methacrylate (MMA) with a precise ratio, a copolymer solution of P(MMA‐MAA) was prepared in a mixed solvent of ethanol and water. Then, styrene (St) was added stepwise along with polymerization for achieving a translucent polymer mixture. Further, a quantitative amount of the polymer mixture and six‐fold volume of water were rapidly mixed with vortex oscillation. The HPPPs were formulated eventually by the assembly of hydrophilic P(MMA‐MAA) copolymers and hydrophobic PSt homopolymers, as well as micelles comprised of P(MMA‐MAA) copolymer and low‐polarity solvent. The size and number of nanopores were effectively regulated by the solvent polarity, polymerization temperature and monomer ratios. Moreover, the resultant HPPPs exhibited a hierarchical porous structure, having broad application in biomedical and environmental sciences. © 2022 Society of Industrial Chemistry.
A gene network of uterine luminal epithelium organizes mouse blastocyst implantation
Authors: Aikawa Shizu , Hirota Yasushi , Fukui Yamato , Ishizawa Chihiro , IIda Rei , Kaku Tetsuaki , Hirata Tomoyuki , Akaeda Shun , Hiraoka Takehiro , Matsuo Mitsunori , Osuga Yutaka 
Published: January 2022

AbstractPurposeThe receptive endometrium is critical for blastocyst implantation. In mice, after blastocysts enter the uterine cavities on day 4 of pregnancy (day 1 = vaginal plug), blastocyst attachment is completed within 24 h, accompanied by dynamic interactions between the uterine luminal epithelium and the blastocysts. Any failures in this process compromise subsequent pregnancy outcomes. Here, we performed comprehensive analyses of gene expression at the luminal epithelium in the peri‐implantation period.MethodsRNA‐seq combined with laser microdissection (LMD) was used to reveal unique gene expression kinetics in the epithelium.ResultsWe found that the prereceptive epithelium on day 3 specifically expresses cell cycle‐related genes. In addition, days 3 and 4 epithelia express glutathione pathway‐related genes, which are protective against oxidative stresses. In contrast, day 5 epithelium expresses genes involved in glycolysis and the regulation of cell proliferation. The genes highly expressed on days 3 and 4 compared to day 5 are related to progesterone receptor signaling, and the genes highly expressed on day 5 compared to days 3 and 4 are associated with the ones regulated by H3K27me3.ConclusionsThese results suggest that specific gene expression patterns govern uterine functions during early pregnancy, contributing to implantation success.
Guaranteed cost optimal leader‐synchronization strategy design for distributed multi‐agent systems with input saturation
Authors: Shi Min , Yuan Huanhuan , Yuan Yuan 
Published: January 2022

AbstractIn this article, a guaranteed cost optimal leader‐synchronization control strategy design problem is investigated for the input‐saturated multi‐agent systems (MASs). A time‐varying network topology is adopted to describe the varying network communication among the MASs in practical situation. With considering input saturation, time‐varying network topology, and stochastic nonlinearities disturbance, it is literally impossible to obtain the accurate value of the associate cost function for the leader‐synchronization performance. As an alternative, an upper bound of cost function is derived for the distributed MASs. Then, the guaranteed cost optimal leader‐synchronization strategy is designed such that the upper bound can be minimized under a fixed domain of attraction (DOA). Meanwhile, an optimization problem is solved to maximize the DOA by the linear matrix inequality (LMI) method over an infinite horizon. Finally, a aircraft example consisting of a leader and four followers is provided to illustrate the validity of the proposed methodology.
Asymmetric integral BLF based state‐constrained flight control using NN and DOB
Authors: Guo Yuyan , Yan Tian , Xu Bin , Tao Chenggang , Sun Shaoshan 
Published: January 2022

AbstractThis article proposes an adaptive back‐stepping flight controller under angle of attack (AOA) constraints. Taking the hypersonic flight vehicle (HFV) for example, considering the AOA constraints caused by the scramjet intake requirements, the asymmetric integral barrier Lyapunov function is used to design the controller, while the AOA is directly limited to a predefined interval without setting the tracking error and virtual control constraints separately. Furthermore, the neural networks and disturbance observer are applied in the controller to deal with the model uncertainty and external disturbance. The system stability and the AOA constraints are proved via Lyapunov analysis. Simulation tests on HFV longitudinal dynamics present that the proposed controller can prevent the AOA from exceeding the given bounds while altitude and velocity tracking.
HydroMoth: Testing a prototype low‐cost acoustic recorder for aquatic environments
Authors: Lamont Timothy A. C. , Chapuis Lucille , Williams Ben , Dines Sasha , Gridley Tess , Frainer Guilherme , Fearey Jack , Maulana Permas B. , Prasetya Mochyudho E. , Jompa Jamaluddin , Smith David J. , Simpson Stephen D. 
Published: January 2022

AbstractPassive acoustic monitoring (PAM) involves recording the sounds of animals and environments for research and conservation. PAM is used in a range of contexts across terrestrial, marine and freshwater environments. However, financial constraints limit applications within aquatic environments; these costs include the high cost of submersible acoustic recorders. We quantify this financial constraint using a systematic literature review of all ecoacoustic studies published in 2020, demonstrating that commercially available autonomous underwater recording units are, on average, five times more expensive than their terrestrial equivalents. This pattern is more extreme at the low end of the price range; the cheapest available aquatic autonomous units are over 40 times more expensive than their terrestrial counterparts. Following this, we test a prototype low‐cost, low‐specification aquatic recorder called the ‘HydroMoth’: this device is a modified version of a widely used terrestrial recorder (AudioMoth), altered to include a waterproof case and customisable gain settings suitable for a range of aquatic applications. We test the performance of the HydroMoth in both aquaria and field conditions, recording artificial and natural sounds, and comparing outputs with identical recordings taken with commercially available hydrophones. Although the signal‐to‐noise ratio and the recording quality of HydroMoths are lower than commercially available hydrophones, the recordings with HydroMoths still allow for the identification of different fish and marine mammal species, as well as the calculation of ecoacoustic indices for ecosystem monitoring. Finally, we outline the potential applications of low‐cost, low‐specification underwater sound recorders for bioacoustic studies, discuss their likely limitations, and present important considerations of which users should be aware. Several performance limitations and a lack of professional technical support mean that low‐cost devices cannot meet the requirements of all PAM applications. Despite these limitations, however, HydroMoth facilitates underwater recording at a fraction of the price of existing hydrophones, creating exciting potential for diverse involvement in aquatic bioacoustics worldwide.
Folic‐Acid‐Functionalized Au Nanoclusters with Red Fluorescence Emission for Rapid and Selective Detection of Cancer Cells
Authors: Wu Miao , Cui Huijing , Yang Yizhou , Dang Ben , Li Daowei , Zhang Zhuqing , Yang Xudong 
Published: January 2022

AbstractMetal nanoclusters have low toxicity and excellent fluorescence properties, and play an important role in environmental and biological detection. Herein, we demonstrate a new approach for synthesis of fluorescent Au nanoclusters (Au NCs) with the function of cancer cells detection. Firstly, we design and synthesize the copolymers of Folic acid–bovine serum albumin (FA‐BSA). In addition, the FA‐BSA copolymer prepared can be used as both stabilizer and reducer of Au NCs, and Au NCs were synthesized by simple hydrothermal method. Therefore, we obtain the fluorescent Au NCs by a convenient, safety and environment‐friendly route. The as‐prepared FA‐functionalized Au NCs are water‐soluble, highly stable and good biological compatibility, and exhibit longwave emission with red light region. Significantly, the Au NCs show outstanding capacity to specifically target the cells overexpressing the folate receptor (FR). These properties indicate that the prepared Au NCs are a promising fluorescent probe for cancer diagnosis and treatment.