bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adaptive neural containment control of nonstrict‐feedback multi‐agent systems with unmodeled dynamics
Authors: Shang Kunfeng , Zhang Tianping , Zhang Enze 
Published: May 2022

SummaryIn this article, an adaptive containment control scheme is put forward for uncertain nonstrict‐feedback multi‐agent systems (MASs) under directed graphs. The dynamic surface control (DSC) approach is extended to the containment control of a class of nonstrict‐feedback MASs, and time‐varying gains are used to replace constant gains in the design process. Using the property of Gaussian function and Young's inequality, and introducing an auxiliary dynamic signal, nonstrict‐feedback structure problem and unmodeled dynamics are effectively resolved. The time‐varying gain controller can make all followers converge to the convex hull spanned by multiple leaders with smaller containment error, and all the signals are bounded. Finally, compared with the constant gain control method, the validity of the time‐varying gain control scheme is illustrated by numerical and actual simulation results.
Stress Relaxation and Composition of Hydrazone‐Crosslinked Hybrid Biopolymer‐Synthetic Hydrogels Determine Spreading and Secretory Properties of MSCs
Authors: Borelli Alexandra N. , Young Mark W. , Kirkpatrick Bruce E. , Jaeschke Matthew W. , Mellett Sarah , Porter Seth , Blatchley Michael R. , Rao Varsha V. , Sridhar Balaji V. , Anseth Kristi S. 
Published: May 2022

AbstractThe extracellular matrix plays a critical role in mechanosensing and thereby influences the secretory properties of bone‐marrow‐derived mesenchymal stem/stromal cells (MSCs). As a result, interest has grown in the development of biomaterials with tunable properties for the expansion and delivery of MSCs that are used in cell‐based therapies. Herein, stress‐relaxing hydrogels are synthesized as hybrid networks containing both biopolymer and synthetic macromer components. Hyaluronic acid is functionalized with either aldehyde or hydrazide groups to form covalent adaptable hydrazone networks, which are stabilized by poly(ethylene glycol) functionalized with bicyclononyne and heterobifunctional small molecule crosslinkers containing azide and benzaldehyde moieties. Tuning the composition of these gels allows for controlled variation in the characteristic timescale for stress relaxation and the amount of stress relaxed. Over this compositional space, MSCs are observed to spread in formulations with higher degrees of adaptability, with aspect ratios of 1.60 ± 0.18, and YAP nuclear:cytoplasm ratios of 6.5 ± 1.3. Finally, a maximum MSC pericellular protein thickness of 1.45 ± 0.38 µm occurred in highly stress‐relaxing gels, compared to 1.05 ± 0.25 µm in non‐adaptable controls. Collectively, this study contributes a new understanding of the role of compositionally defined stress relaxation on MSCs mechanosensing and secretion.
Mechanism and Impact of Bipolar Current Voltage Asymmetry in Computational Phase‐Change Memory
Authors: Sarwat Syed Ghazi , Le Gallo Manuel , Bruce Robert L , Brew Kevin , Kersting Benedikt , Jonnalagadda Vara Prasad , Ok Injo , Saulnier Nicole , BrightSky Matthew , Sebastian Abu 
Published: May 2022

AbstractNanoscale resistive memory devices are being explored for neuromorphic and in‐memory computing. However, non‐ideal device characteristics of read noise and resistance drift pose significant challenges to the achievable computational precision. Here, it is shown that there is an additional non‐ideality that can impact computational precision, namely the bias‐polarity‐dependent current flow. Using phase‐change memory (PCM) as a model system, it is shown that this “current–voltage” non‐ideality arises both from the material and geometrical properties of the devices. Further, we discuss the detrimental effects of such bipolar asymmetry on in‐memory matrix‐vector multiply (MVM) operations and provide a scheme to compensate for it.
Solar‐Boosted Paper‐Based Microfluidic Fuel Cells for Miniaturized Power Sources
Authors: Wang Wei , Shen Liu‐Liu , Yu Hui , Xu Wenkai , Wang Jiansong , Yong Cong , Zhang Gui‐Rong , Mei Donghai 
Published: May 2022

AbstractPaper‐based microfluidics emerges as an innovative platform for constructing miniaturized electrochemical devices, which mainly benefit from the spontaneous capillary action of paper. Nevertheless, the capillary‐driven flow dynamics on paper are determined exclusively by the intrinsic properties of paper and fluidics, thus lacking the controllability that conventional pump‐based microfluidics can provide. Herein, an approach to regulating the capillary flow on paper is introduced by conjugating the outlets of microfluidic channels with a photothermal module for water evaporation. The capillary flow rate on paper can be handily regulated from 4 to 37 µL min−1 under controllable illumination conditions. As a proof‐of‐concept, prototypical paper‐based microfluidic fuel cells integrated with the photothermal module are constructed. Their peak power density can be boosted from 0.3 up to 2.1 mW cm−2 under the simulated sunlight irradiation. The influence of capillary flow rate on the fuel cell performance is further validated using multiphysics simulations. The present work not only provides a practically feasible method to boost the performance of paper‐based microfluidic fuel cells using solar energy, but also opens a new avenue for modulating the performance of paper‐based microfluidics, which has long been a challenge in this field.
Succulent‐Inspired Ultraflexible and Multifunctional Carbon Aerogel for High‐Performing Strain Sensing and Thermal Management
Authors: Dang Shixuan , Yu Hongxuan , Fu Shubin , Deng Yuanpeng , Zhang Chuanwei , Gu Le , Guo Jingran , Zhang Pengyu , Zhou Jian , Zhu Jian , Xu Xiang 
Published: May 2022

AbstractPorous carbon materials have exhibited many superior characteristics with extensive applications. To adequately exert their advantages at macroscale, the mechanical property plays a critical role to ensure the structural stability and functionality. Porous carbon monoliths overcome brittleness by endowing compressive superelasticity but are still plagued by poor toughness, easily suffering from the tensile, bending, or torsional fracture. Here, inspired by the biostructure of succulent plants, graphene aerogel is used to mimic the hydrenchyma tissue, carbon nanotube aerogel film as the epidermis, and graphene oxide ethanol solution as the hemicellulose binder to make ultraflexible carbon aerogels (UCAGs), addressing the critical and bottleneck issue between mechanics and functionality. The UCAGs feature a sequence of robust mechanical properties simultaneously, including compressive strain up to 99.5%, tensile strength up to 460 kPa, bending and torsional angle up to 180°. This ultraflexible aerogel is exploited for large‐deformable, and high‐sensitive strain sensor with extended working temperature (−196 to 400 °C), as well as lightweight thermal regulator with record‐high switch ratio (500:1). The high‐performance structures of this type establish a set of fundamental considerations in structural design of inorganic aerogels for a wide spectrum of applications.
Ferroelectric Field‐Effect‐Transistor Integrated with Ferroelectrics Heterostructure
Authors: Baek Sungpyo , Yoo Hyun Ho , Ju Jae Hyeok , Sriboriboon Panithan , Singh Prashant , Niu Jingjie , Park Jin‐Hong , Shin Changhwan , Kim Yunseok , Lee Sungjoo 
Published: May 2022

AbstractTo address the demands of emerging data‐centric computing applications, ferroelectric field‐effect transistors (Fe‐FETs) are considered the forefront of semiconductor electronics owing to their energy and area efficiency and merged logic–memory functionalities. Herein, the fabrication and application of an Fe‐FET, which is integrated with a van der Waals ferroelectrics heterostructure (CuInP2S6/α‐In2Se3), is reported. Leveraging enhanced polarization originating from the dipole coupling of CIPS and α‐In2Se3, the fabricated Fe‐FET exhibits a large memory window of 14.5 V at VGS = ±10 V, reaching a memory window to sweep range of ≈72%. Piezoelectric force microscopy measurements confirm the enhanced polarization‐induced wider hysteresis loop of the double‐stacked ferroelectrics compared to single ferroelectric layers. The Landau–Khalatnikov theory is extended to analyze the ferroelectric characteristics of a ferroelectric heterostructure, providing detailed explanations of the hysteresis behaviors and enhanced memory window formation. The fabricated Fe‐FET shows nonvolatile memory characteristics, with a high on/off current ratio of over 106, long retention time (>104 s), and stable cyclic endurance (>104 cycles). Furthermore, the applicability of the ferroelectrics heterostructure is investigated for artificial synapses and for hardware neural networks through training and inference simulation. These results provide a promising pathway for exploring low‐dimensional ferroelectronics.
Boosting C2H6/C2H4 separation in scalable metal‐organic frameworks through pore engineering
Authors: Zhang Peng‐Dan , Zhang Xin , Wu Xue‐Qian , Xu Zi‐Chao , Li Jian‐Rong 
Published: May 2022

AbstractThe development of ethane (C2H6)‐selective adsorbents for ethylene (C2H4) purification, although challenging, is of prime industrial importance. Pillared‐layer metal‐organic frameworks (MOFs) possess facilely tunable pore structure and functionality, which means they have excellent potential for high‐performance C2H6/C2H4 separation applications. Herein, we report a family of isostructural pillared‐layer MOFs with various metal centers M and co‐ligands L, M2(D‐cam)4L2 (denoted M‐cam‐L; M = Cu, Co, Ni; L = pyz, apyz, dabco), with a variety of pore surface properties. All of the M‐cam‐L materials exhibit preferential adsorption for C2H6 over C2H4. In particular, Ni‐cam‐pyz exhibits the highest C2H6 capture capacity (68.75 cm3 g−1 at 1 bar and 298 K), Cu‐cam‐dabco possesses the greatest C2H6/C2H4 adsorption selectivity (2.3), and the lowest isosteric heat of adsorption is demonstrated for Cu‐cam‐pyz (20.1 kJ mol−1). Dynamic column breakthrough experiments also confirmed the excellent separation performance of M‐cam‐pyz and M‐cam‐dabco materials. The synthesis route of the M‐cam‐L materials is easily scaled‐up under laboratory conditions, and hence this class of MOFs is promising for practical C2H4 purification.
Flow regimes and pressure drop of a composite tridimensional rotational flow sieve tray under concurrent gas‐liquid flow
Authors: Zhang Shaofeng , Liu Bingfang , Wang Hongkai , Liu Yan , Wang Dewu , Tang Meng , Dai Shijie 
Published: May 2022

AbstractA composite tridimensional rotational flow sieve tray (CTRST) is proposed. The flow patterns of CTRST were visually categorized, combined with the standard deviation of the pressure difference. In the TRST area of the internal packing‐type tray, the membrane‐drip column and foam‐embolic flow is present, while bubbly and milk froth‐ribbon flow is present in the packing area of the external packing‐type tray. The effect of the tray structure parameters on the pressure drop under co‐current flow was investigated. The dry and wet pressure drop is within 160 and 900 Pa, respectively. Under the same structural parameters, the pressure drop of the internal packing‐type tray was higher than that of the external packing‐type tray. The flow characteristics of the standard tray under the countercurrent flow were compared. The CTRST was found to be more suitable for co‐current flow. A prediction model pressure drop under co‐current was established with an error of 15.5%.
Systemic capillary leak syndrome requiring fasciotomy for limb compartment syndrome: A case report and literature review
Authors: Tanabe Maki , Hikone Mayu , Sugiyama Kazuhiro , Hamabe Yuichi 
Published: May 2022

BackgroundLimb compartment syndrome (LCS), a rare but serious complication of systemic capillary leak syndrome (SCLS)‐related systemic edema, warrants prompt decompressive fasciotomy. We report a case of SCLS complicated by LCS of four extremities requiring emergent fasciotomies; furthermore, we reviewed existing published reports on SCLS with LCS.Case PresentationA 36‐year‐old man was diagnosed with SCLS based on profound vascular permeability with no other underlying conditions. Within a few hours of admission, LCS was noted in the patient's lower legs and thighs and he was treated using decompressive fasciotomy. Additional forearm fasciotomy was subsequently carried out. After fluid management, vasopressor support, mechanical ventilation, and renal replacement therapy, the patient was discharged without any neuromuscular deficits caused by LCS. Literature review suggested that lower legs are prone to LCS in patients with SCLS.ConclusionLimb compartment syndrome is a serious complication that clinicians must be aware of and requires prompt decompressive fasciotomy.
A systematic study on the effect of different error structures on pseudo‐univariate and multivariate figures of merit
Authors: Akvan Nadia , Azimi Gholamhasan 
Published: May 2022

AbstractIn this study, the effect of different error structures on psedounivariate and multivariate analytical figures of merit in simulated data of hyphenated  chromatographic systems was investigated. Different error structures (e.g., homoscedastic, heteroscedastic, and correlated) were investigated. For this purpose, five components systems at five concentration levels with three replicates were simulated. Different types of error were added to the data. Multivariate Curve Resolution‐Alternating Least Squares (MCR‐ALS) and Maximum Likelihood Principal Component Analysis (MLPCA‐MCR‐ALS) methods were used. After resolution, pseudo‐univariate and multivariate analytical figures of merit were calculated and compared. As it expected, the detection limit for noisy datasets is higher than the noise‐free datasets, whereas the slopes of the calibration curves are not significantly different. Comparing the results generally showed that the detection limit values in multivariable mode were better than the univariate mode. The LODs of data (pseudo‐univariate and multivariate) with homoscedastic and correlated error structure by MCR‐ALS and MLPCA‐MCR‐ALS were the same. The analysis of data with heteroscedastic error structure by MLPCA‐MCR‐ALS had a lower detection limit than analysis with MCR‐ALS. The figures of merit obtained from WLS and OLS regression in heteroscedastic datasets were compared and better LODs were obtained after WLS method.
Superassembled Hierarchical Asymmetric Magnetic Mesoporous Nanorobots Driven by Smart Confined Catalytic Degradation
Authors: Yan Miao , Ma Ding , Qiu Beilei , Liu Tianyi , Xie Lei , Zeng Jie , Liang Kang , Xin Hui , Lian Zhexun , Jiang Lei , Kong Biao 
Published: May 2022

AbstractInvited for the cover of this issue is the group of Biao Kong at Fudan University. The image depicts a hierarchical asymmetric magnetic mesoporous hollow nanorobot that combines the functionalities of magnetic responsiveness, reusability, sustainable motility and durable motion, showing excellent pollutant degradation capability. Read the full text of the article at. 10.1002/chem.202200307
Genuine Pores in a Stable Zinc Phosphite for High H2 Adsorption and CO2 Capture
Authors: Chen Ju‐Ying , Chen Sheng‐Yu , Chen Wei‐Ting , Yin Mu‐Chien , Wang Chih‐Min 
Published: May 2022

AbstractInvited for the cover of this issue are Chih‐Min Wang and co‐workers at Academia Sinica of Taiwan and National Taiwan Ocean University. The image depicts an unusual organic‐inorganic hybrid zinc phosphite with interesting structural features and gas adsorption properties. Read the full text of the article at 10.1002/chem.202200732.
The intersection of sexual orientation with race and ethnicity in cervical cancer screening
Authors: Stenzel Ashley E. , Bustamante Gabriela , Sarkin Courtney A. , Harripersaud Katherine , Jewett Patricia , Teoh Deanna , Vogel Rachel I. 
Published: May 2022

BackgroundCervical cancer screening is recommended for those with a cervix who are 21 to 65 years old, with specific timelines being dependent on individual risk. This study compared rates of ever undergoing Papanicolaou (Pap) testing at the intersection of self‐reported sexual minority (SM) status and race/ethnicity.MethodsData from the National Health Interview Survey (2015 and 2018) were used to examine cervical cancer screening disparities. Natal females without a history of hysterectomy who were 21 to 65 years old and had reported their sexual orientation and Pap testing history were included. Demographic and health characteristics were summarized with descriptive statistics. To adjust for differences in confounding variables between groups, propensity score–based inverse probability of treatment weighting (IPTW) was performed. IPTW‐adjusted multivariable logistic regression models estimated odds of ever undergoing a Pap test by sexual orientation alone and with race/ethnicity (non‐Hispanic White, non‐Hispanic Black, and Hispanic).ResultsSM persons (n = 877) had significantly reduced odds of ever undergoing Pap testing (odds ratio, 0.54; 95% confidence interval, 0.42‐0.70) in comparison with heterosexual persons (n = 17,760). When the intersection of sexual orientation and race/ethnicity was considered, non‐Hispanic White SM participants and Hispanic SM participants had reduced odds of ever undergoing Pap testing in comparison with non‐Hispanic White heterosexual participants. No significant differences were observed between non‐Hispanic White heterosexual participants and participants of non‐Hispanic Black SM or Hispanic heterosexual identities.ConclusionsSM participants were significantly less likely to have ever undergone a Pap test in comparison with heterosexual participants, with Hispanic SM participants having the lowest uptake. Future studies should further examine the roles of systemic discrimination and other key drivers of these disparities.
Recent Development of Polyaniline/graphene Composite Electrodes for Flexible Supercapacitor Devices
Authors: Balqis Falihah , Prakoso Bagas , Hanif Hawari Naufal , Eldona Calvin , Sumboja Afriyanti 
Published: May 2022

AbstractFlexible supercapacitors are attracting interest in wearable technologies as they can withstand mechanical deformations while delivering their energy storage function. Among frequently investigated electrode materials for flexible supercapacitors, polyaniline/graphene composites are favorable due to their synergistic properties that assure excellent specific capacitance, cycling stability, and high rate capability. This review highlights recent strategies to advance structural designs and synthesis methods of polyaniline/graphene electrodes for flexible supercapacitors. Firstly, the general mechanism and feature of the flexible supercapacitor will be discussed, followed by current challenges that focus on two key aspects, structural design and synthesis of the electrode. Next, by sorting the composites based on their morphological dimensionalities (i. e., one‐, two‐, and three‐dimensional), and focusing the discussion on the two key aspects, we evaluate recent and effective strategies to develop flexible supercapacitors with polyaniline/graphene composite electrode. Finally, future perspectives are given for broader applications of the flexible supercapacitors.
Two‐Dimensional Materials and their Hetero‐Superlattices for Photocatalytic Hydrogen Evolution Reaction
Authors: Pramoda K. , Rao C. N. R. 
Published: May 2022

AbstractSince the discovery of graphene, there has been intensive research on other two‐dimensional (2D) analogues. Some of them are elemental 2D materials such as phosphorene and bismuthene. Others are binary compounds fascinating in terms of energy applications are transition metal dichalcogenides (TMDCs: MoS2, MoSe2) and MXenes (Ti3C2, Nb2C3). 1T‐forms of MoS2 and MoSe2 are probably the best materials reported for dye‐sensitized photocatalytic hydrogen evolution reaction (HER). Here, we first highlight the phase engineering in 2D‐TMDCs to enhance hydrogen evolution activity. Generation of hetero‐superlattices of TMDCs with other HER active materials such as graphene, carbon nitride and borocarbonitrides, by utilizing coupling and electrostatic restacking strategies, appears to be advantageous for photocatalytic application. These hetero‐superlattices provide a counterpoint to the van der Waals heterostructures by means of covalent bonds. Ladder‐like networks of heterolayers generated due to cross‐linking enhance the interfacial area and charge‐transfer interactions, thereby improving HER activity. The use of 2D phosphorene as a photocatalytic material is limited by its ambient instability. Covalent functionalization of phosphorene surface with tris(pentafluorophenyl) borane and benzyl group increases ambient stability and dispersibility. The functionalized surface can be further utilized to cross‐link with amine or acid‐modified TMDCs. The HER activity obtained with phosphorene‐MoS2 superlattices is the highest reported among the phosphorene‐based systems, thus setting a new example for metal‐free catalysis. The ambient instability of MXenes and other related 2d materials under photocatalytic conditions can be resolved either by functionalization or by forming hetero‐superlattices.
A Light‐Dark Cascade Procedure for the Regeneration of NADH using Graphitic Carbon Nitride Nanosheets
Authors: Wang Yaoqiang , Jin Yu , Wang Zishuai , Xiao Gang , Su Haijia 
Published: May 2022

AbstractPhotocatalytic regeneration of NAD(P)H is a green and promising method which utilizes clean solar energy. However, we found in this study that light exposure of NADH will cause the deactivation of the regenerated NADH. Therefore, we used ultrathin g‐C3N4 nanosheets as photocatalyst and developed a two‐pot light‐dark cascade procedure for NADH regeneration to avoid the light exposure and the deactivation of NADH. This two‐pot procedure included a first light reaction step where triethanolamine was converted to glycolaldehyde through visible light photocatalysis which could reduce NAD+ to NADH through a non‐catalytic process in the followed dark reaction step. Using this procedure, the NADH productivity reached 1.625 mmol ⋅ h−1 ⋅ g−1 and was about 29 times higher that obtained in the one‐pot method. The regenerated NADH using the two‐pot procedure could act as cofactor of alcohol dehydrogenase to catalyze the reduction of acetaldehyde, illustrating the application potential of this procedure to aid enzyme catalyzed redox reactions.