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Bidirectional rotating direct-current triboelectric nanogenerator with self-adaptive mechanical switching for harvesting reciprocating motion

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INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING 2024年第4期6卷 324-335页

作者： Lee, Donghan Chae, Joonmin Cho, Sumin Kim, Jong Woo Ahmad, Awais Karim, Mohammad Rezaul La, Moonwoo Park, Sung jea.Choi, Dongwhi Kyung Hee Univ Dept Mech Engn Integrated Engn Program 1732 Deogyeong Daero Yongin 17104 Gyeonggi South Korea Univ Lahore Dept Chem Lahore Pakistan King Saud Univ Coll Engn Dept Mech Engn Riyadh 11421 Saudi Arabia Korea Univ Technol & Educ Sch Mech Engn 1600 Chungjeol Ro Cheonan 31253 Chungnam South Korea

Amid the growing interest in triboelectric nanogenerators (TENGs) as novel energy-harvesting devices, several studies have focused on direct current (DC) TENGs to generate a stable DC output for operating electronic devices. However, owing to the working mechanisms of conventional DC TENGs, generating a stable DC output from reciprocating motion remains a challenge. Accordingly, we propose a bidirectional rotating DC TENG (BiR-TENG), which can generate DC outputs, regardless of the direction of rotation, from reciprocating motions. The distinct design of the BiR-TENG enables the mechanical rectification of the alternating current output into a rotational-direction-dependent DC output. Furthermore, it allows the conversion of the rotational-direction-dependent DC output into a unidirectional DC output by adapting the configurations depending on the rotational direction. Owing to these tailored design strategies and subsequent optimizations, the BiR-TENG could generate an effective unidirectional DC output. Applications of the BiR-TENG for the reciprocating motions of swinging doors and waves were demonstrated by harnessing this output. This study demonstrates the potential of the BiR-TENG design strategy as an effective and versatile solution for energy harvesting from reciprocating motions, highlighting the suitability of DC outputs as an energy source for electronic devices. A mechanical rectification based direct-current triboelectric nanogenerator is developed. The system can generate a unidirectional output regardless of direction of rotation. A self-adaptive mechanical design is implemented. Applications for harvesting abundant ambient reciprocating motion are introduced.

关键词： direct-current triboelectric nanogenerator mechanical rectification self-adaptive mechanical design harvesting reciprocation motion ENERGY VIBRATION

Recent development and challenges in enhancing fire performance on wood and wood-based composites:A 10-year review from 2012 to 2021

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Journal of Bioresources and Bioproducts 2024年第1期9卷 27-42页

作者： charles Michael Albert Kang Chiang liew Faculty of Tropical Forestry Universiti Malaysia SabahKota Kinabalu 88400Kota KinabaluSabah 88400Malaysia

Due to their durability,versatility,and aesthetic value,wood and wood-based composites are widely used as building *** fact that these materials are flammable,however,raises a major worry since they might cause fire hazards and significant loss of life and *** article investigates the variables that affect fire performance as well as the various fire-retardant treatments and their *** current developments and challenges in improving the fire performance of wood and wood-based composites treated with fire-retardant materials are summarized in this ***,organic chemicals,and densification are some recent developments in fire-retardant treatments that are also *** points from the review are summarized,along with potential areas for further research and development.

关键词： Fire performance Fire-retardant materials Wood Wood-based composite Nanoparticles coating Surface charring Bio-based fire retardant Densification

Selective Hydrodeoxygenation of lignin-Derived Vanillin via Hetero-Structured High-Entropy Alloy/Oxide Catalysts

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Energy & Environmental Materials 2024年第3期7卷 202-210页

作者： Yan Sun Kaili liang Ren Tu Xudong Fan charles Q.Jia Zhiwen Jia Yingnan li Hui Yang Enchen Jiang Hanwen liu Yonggang Yao Xiwei Xu Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Agricultural UniversityGuangzhou 510640China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetToronto ON M5S3E5Canada State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The chemoselective hydrodeoxygenation of natural lignocellulosic materials plays a crucial role in converting biomass into value-added *** their complex molecular structures often require multiple active sites synergy for effective activation and achieving high ***,it is reported that a high-entropy alloy(HEA)on high-entropy oxide(HEO)hetero-structured catalyst for highly active,chemoselective,and robust vanillin *** heterogenous HEA/HEO catalysts were prepared by thermal reduction of senary HEOs(NiZnCuFeAlZrO_(x)),where exsolvable metals(e.g.,Ni,Zn,Cu)in situ emerged and formed randomly dispersed HEA nanoparticles anchoring on the HEO *** catalyst exhibits excellent catalytic performance:100%conversion of vanillin and 95%selectivity toward high-value 2-methyl-4 methoxy phenol at low temperature of 120℃,which were attributed to the synergistic effect among HEO matrix(with abundant oxygen vacancies),anchored HEA nanoparticles(having excellent hydrogenolysis capability),and their intimate hetero-interfaces(showing strong electron transferring effect).Therefore,our work reported the successful construction of HEA/HEO heterogeneous catalysts and their superior multifunctionality in biomass conversion,which could shed light on catalyst design for many important reactions that are complex and require multifunctional active sites.

关键词： biomass conversion heterogeneous catalysts high-entropy oxide high-entropy alloys lignin pyrolysis

Prediction of Porous Media Fluid Flow with Spatial Heterogeneity Using Criss-Cross Physics-Informed Convolutional Neural Networks

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1323-1340页

作者： Jiangxia Han liang Xue Ying Jia Mpoki Sam Mwasamwasa Felix Nanguka charles Sangweni Hailong liu Qian li State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China Department of Oil-Gas Field Development Engineering College of Petroleum EngineeringChina University of PetroleumBeijing102249China Exploration Production Research Institute SinopecBeijing102249China Ministry of Energy Tanzania Petroleum Development CorporationTowerDar es Salaam2774Tanzania Ministry of Energy Building Petroleum Upstream Regulatory Authority in Tanzania(PURA)Dar es Salaam11439Tanzania

Recent advances in deep neural networks have shed new light on physics,engineering,and scientific *** the data-centered viewpoint with physical simulation is one of the research *** physicsinformedneural network(PINN)is currently the most general framework,which is more popular due to theconvenience of constructing NNs and excellent generalization *** automatic differentiation(AD)-basedPINN model is suitable for the homogeneous scientific problem;however,it is unclear how AD can enforce fluxcontinuity across boundaries between cells of different properties where spatial heterogeneity is represented bygrid cells with different physical *** this work,we propose a criss-cross physics-informed convolutionalneural network(CC-PINN)learning architecture,aiming to learn the solution of parametric PDEs with spatialheterogeneity of physical *** achieve the seamless enforcement of flux continuity and integration ofphysicalmeaning into CNN,a predefined 2D convolutional layer is proposed to accurately express transmissibilitybetween adjacent *** efficacy of the proposedmethodwas evaluated through predictions of several petroleumreservoir problems with spatial heterogeneity and compared against state-of-the-art(PINN)through numericalanalysis as a benchmark,which demonstrated the superiority of the proposed method over the PINN.

关键词： Physical-informed neural networks(PINN) flow in porous media convolutional neural networks spatial heterogeneity machine learning

Sigma-1 receptor: culprit and rescuer in motor neuron diseases

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Neural Regeneration Research 2021年第1期16卷 106-107页

作者： jea.-charles liévens Tangui Maurice MMDN Univ MontpellierINSERMEPHEMontpellierFrance

Initially,the Sigma-1 receptor(S1R)was incorrectly categorized as one of the opioid *** it has since become clear that S1R is a non-opioid non-phencyclidine receptor with molecular chaperone activity.S1R is a 223 amino-acid long protein that shares no clear homology with any other known mammalian proteins,its closest homolog being the fungal ERG2 sterol *** its pharmacological counterpart,the Sigma-2 receptor that was only recently cloned,is genetically distinct.S1R is more likely considered as an atypical ligand-modulated chaperone protein.S1R is widely expressed in many organs including brain where its function has mainly been explored.

关键词： organs opioid Sigma

Historic,pre-stock enhancement,demographic conditions of exploited populations of dusky flathead,Platycephalus fuscus,in eastern Australia

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Aquaculture and Fisheries 2024年第2期9卷 314-323页

作者： charles A.Gray WildFish Research Grays PointSydney2232Australia

Responsible stock enhancement initiatives require baseline data of wild population demographic conditions that can be used in testing management *** study provides the first fishery-independent assessment of length-and age-based biological characteristics of exploited populations of Platycephalus fuscus in eastern Australia prior to stock *** was conducted over seven estuaries spanning seven degrees of latitude and the geographical range of proposed stock *** in all estuaries showed evidence of length and age truncation,especially those subject to commercial fisheries where young individuals of both sexes dominated *** longevities were 12 and 11 years for females and males respectively,but few females>5 years and males>3 years were generally *** dominated populations,and on average,the mean lengths and ages of females were greater than males within each estuary and across all age *** dimorphic variation in growth was evident across all estuaries,with females attaining greater maximum lengths than ***-specific differences in individual growth were not *** average,over 50%of females sampled in each estuary were>the minimum legal length(MLL),but the opposite was evident for *** contrast,over 25%of males in each estuary were>the mean length at maturity(L50),whereas in all but one estuarythe *** male and female *** should recruit to the fishery in 2 and 3 years,and contribute to the spawning stock in 1.5 and 4.5 years,*** study provides important historical baseline data that can contribute to testing stock enhancement outcomes on populations.

关键词： Baseline data Fishery enhancement Management evaluation Platycephalidae Recreational fishing Restocking Stock assessment

Mitochondrial quality control in amyotrophic lateral sclerosis：towards a common pathway？

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Neural Regeneration Research 2017年第7期12卷 1052-1061页

作者： Bilal Khalil jea.-charles liévens Department of Neuroscience Mayo Clinic Florida Jacksonville FL USA MMDN Université de Montpellier EPHE INSERM U1198 Montpellier France

Amyotrophic lateral sclerosis（ALS）is a devastating neurodegenerative disorder characterized by loss of upper and lower motor *** mechanisms contribute to the disease initiation and progression,including mitochondrial dysfunction which has been proposed to be a central determinant in ALS ***,while mitochondrial defects have been mainly described in ALS-linked SOD1 mutants,it is now well established that mitochondria become also dysfunctional in other ALS *** such context,the mitochondrial quality control system allows to restore normal functioning of mitochondria and to prevent cell death,by both eliminating and replacing damaged mitochondrial components or by degrading the entire organelle through *** evidence shows that ALS-related genes interfere with the mitochondrial quality control *** review highlights how ineffective mitochondrial quality control may render motor neurons defenseless towards the accumulating mitochondrial damage in ALS.

关键词： C9orf72 FUS SOD1 Optineurin Parkin PGC-1α PINK1 TDP-43 proteinopathies TBK1 VCP

Endoplasmic reticulum stress,autophagy,neuroinflammation,and sigma 1 receptors as contributors to depression and its treatment

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Neural Regeneration Research 2024年第10期19卷 2202-2211页

作者： Chika Fujii charles F.Zorumski Yukitoshi Izumi Department of Psychiatry Washington University School of MedicineSt.LouisMOUSA Taylor Family Institute for Innovative Psychiatric Research Washington University School of MedicineSt.LouisMOUSA

The etiological factors contributing to depression and other neuropsychiatric disorders are largely undefined. Endoplasmic reticulum stress pathways and autophagy are well-defined mechanisms that play critical functions in recognizing and resolving cellular stress and are possible targets for the pathophysiology and treatment of psychiatric and neurologic illnesses. An increasing number of studies indicate the involvement of endoplasmic reticulum stress and autophagy in the control of neuroinflammation, a contributing factor to multiple neuropsychiatric illnesses. Initial inflammatory triggers induce endoplasmic reticulum stress, leading to neuroinflammatory responses. Subsequently, induction of autophagy by neurosteroids and other signaling pathways that converge on autophagy induction are thought to participate in resolving neuroinflammation. The aim of this review is to summarize our current understanding of the molecular mechanisms governing the induction of endoplasmic reticulum stress, autophagy, and neuroinflammation in the central nervous system. Studies focused on innate immune factors, including neurosteroids with anti-inflammatory roles will be reviewed. In the context of depression, animal models that led to our current understanding of molecular mechanisms underlying depression will be highlighted, including the roles of sigma 1 receptors and pharmacological agents that dampen endoplasmic reticulum stress and associated neuroinflammation.

关键词： allopregnanolone fluvoxamine ketamine neurosteroids postpartum depression quercetin

Function and dysfunction of GEMIN5:understanding a novel neurodevelopmental disorder

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Neural Regeneration Research 2024年第11期19卷 2377-2386页

作者： charles H.Nelson Udai B.Pandey Department of Pediatrics Division of Child NeurologyChildren’s Hospital of PittsburghUniversity of Pittsburgh Medical CenterPittsburghPAUSA Children’s Neuroscience Institute Children’s Hospital of PittsburghUniversity of Pittsburgh Medical CenterPittsburghPAUSA

The recent identification of a neurodevelopmental disorder with cerebellar atrophy and motor dysfunction(NEDCAM)has resulted in an increased interest in GEMIN5,a multifunction RNA-binding *** the largest member of the survival motor neuron complex,GEMIN5 plays a key role in the biogenesis of small nuclear ribonucleoproteins while also exhibiting translational regulatory functions as an independent *** many questions remain regarding both the pathogenesis and pathophysiology of this new disorder,considerable progress has been made in the brief time since its *** this review,we examine GEMIN5 within the context of NEDCAM,focusing on the structure,function,and expression of the protein specifically in regard to the disorder ***,we explore the current animal models of NEDCAM,as well as potential molecular pathways for treatment and future directions of *** review provides a comprehensive overview of recent advances in our understanding of this unique member of the survival motor neuron complex.

关键词： cerebellar atrophy GEMIN5 neurodevelopmental disorder neurological disease SMN complex