bluuebunny/crossref_metadata_2025_split huggingface dataset:
Exploitation de données multidimensionnelles du mouvement à partir de différents niveaux de synthèse spatio-temporelle : exemple avec le lever de charge
Authors: Loslever Pierre , Bouilland Stéphane 
Published: December 2008

RESUME À titre d’exemple pour l’analyse exploratoire de données multivariées et multifactorielles du mouvement, on considère une étude visant à comparer deux modes de lever de charge : lever " libre " avec trois niveaux de charge et lever isocinétique avec trois vitesses. Face au nombre élevé de variables considérées (232), une méthodologie basée sur la notion de fenêtrage spatio-temporel et l’analyse des correspondances multiples est présentée en détail. Notamment on insiste sur le fait de commencer par des analyses non temporelles puis de terminer en introduisant le facteur temps. Après avoir présenté les résultats, une discussion aborde la problématique de l’exploitation des données en général, en évoquant quelques aspects clés comme la complexité, la subjectivité et la place prise (nombre de pages) par l’explication de la démarche statistique et l’explosé des résultats, cela par rapport à une approche statistique plus classique.
La compréhension d'un document technique multimédia peut-elle être améliorée par une présentation séquentielle de son contenu ?
Authors: Jamet Éric , Arguel Amael 
Published: December 2008

RESUME Les documents techniques électroniques sont de plus en plus courants dans de nombreuses formations scolaires, universitaires ou professionnelles. Ces documents électroniques présentent un certain nombre d’avantages sur leurs homologues présentés sur papier. L’un d’eux est la possibilité de présenter progressivement une information visuelle synchronisée à l’explication orale correspondante. En nous appuyant sur des résultats expérimentaux récents, nous nous proposons de comparer ce type de présentation à une présentation statique du même contenu dans un document de formation sur les gestes de premiers secours. Nous faisons l’hypothèse que la supériorité de ce type de présentation ne se limitera pas à des contenus eux-mêmes séquentiels – par exemple, une procédure –, mais aussi à d’autres contenus sans relations temporelles spécifiques. Cette hypothèse est vérifiée : les bénéfices de la présentation séquentielle sont mis en évidence dans une épreuve impliquant la connaissance d’une série d’actions dans un ordre spécifique, mais aussi sur des questions portant sur le rappel de notions où l’ordre n’est pas impliqué. Des bénéfices de la présentation séquentielle sont aussi mis en évidence pour une tâche de transfert de connaissances. Les retombées de cette expérience sur la conception de documents techniques électroniques sont discutées.
Management of Diverticulitis
Authors: Sacks Olivia A. , Hall Jason 
Published: April 2024

ImportanceCare of patients with diverticulitis is undergoing a paradigm shift. This narrative review summarizes the current evidence for left-sided uncomplicated and complicated diverticulitis. The latest pathophysiology, advances in diagnosis, and prevention strategies are also reviewed.ObservationsTreatment is moving to the outpatient setting, physicians are forgoing antibiotics for uncomplicated disease, and the decision for elective surgery for diverticulitis has become preference sensitive. Furthermore, the most current data guiding surgical management of diverticulitis include the adoption of new minimally invasive and robot-assisted techniques.Conclusions and RelevanceThis review provides an updated summary of the best practices in the management of diverticulitis to guide colorectal and general surgeons in their treatment of patients with this common disease.
High Effective Permeability and Low Power Loss of FeSiAl/Al2O3/ZnO SMC for High Frequency Application
Authors: Li Hongxia , Lu Ziwen , Yu Shuai , Zhao Mengyi , Liu Zhaoyuan , Li Zhong , Rong Huawei , Zhang Xuefeng 
Published: April 2024

AbstractSoft magnetic composites (SMCs) are key materials in electronic devices. Conventional SMCs incorporate too much insulating material in order to reduce eddy current loss at high frequency, resulting in severe magnetic dilution and demagnetization field, which leads to deterioration of the magnetic performance. In this paper, ZnO precursor is homogeneously deployed on the surface of FeSiAl, which in situ generates a thin and dense Al2O3 layer on the surface of FeSiAl through the interfacial solid phase reaction between Al and O atoms during annealing process. Meanwhile, ferromagnetic ZnO layer is simultaneously obtained due to the loss of O. The formed Al2O3/ZnO layers effectively reduce power loss and endow high frequency stability with less influence on effective permeability. Finally, FeSiAl/ZnO‐0.4% SMC exhibits low power loss of 83.2 mW cm−3 (50 mT/100 kHz), high effective permeability of 92, and cut‐off frequency as high as 40 MHz. This study provides an efficient route for high performance SMCs and broadens high frequency application of soft magnetic devices.
Boosting External Quantum Efficiency of Blue Perovskite QLEDs Exceeding 23% by Trifluoroacetate Passivation and Mixed Hole Transportation Design
Authors: Nong Yingyi , Yao Jisong , Li Jiaqi , Xu Leimeng , Yang Zhi , Li Chuang , Song Jizhong 
Published: April 2024

AbstractPerovskite quantum dot‐based light‐emitting diodes (QLEDs) have been considered a promising display technology due to their wide color gamut for authentic color expression. Currently, the external quantum efficiency (EQE) for state‐of‐the‐art blue perovskite QLEDs is about 15%, which still lags behind its green and red counterparts (>25%) and blue film‐based LEDs. Here, blue perovskite QLEDs that achieve an EQE of 23.5% at 490 nm is presented, to the best knowledge, which is the highest value reported among blue perovskite‐based LED fields. This impressive efficiency is achieved through a combination of quantum dot (QD) passivation and optimal device design. First, blue mixed halide perovskite CsPbCl3−xBrx QDs passivated by trifluoroacetate exhibit excellent exciton recombination behavior with a photoluminescence quantum yield of 84% due to reducing uncoordinated Pb surface defects. Furthermore, the device is designed by introducing a mixed hole‐transport layer (M‐HTL) to increase hole injection and transportation capacity and improve carrier balance. It is further found that M‐HTL can decrease carrier leakage and increase radiative recombination in the device, evidenced by the visual electroluminescence spectrum at 2.0 V. The work breaks through the EQE gap of 20% for blue perovskite‐based QLEDs and significantly promotes their commercialization process.
Vacuum Thermoforming of Optically Switchable Liquid Crystalline Elastomer Spherical Actuators
Authors: Yue Lansong , Ambergen Erik P. J. , Lugger Sean J. D. , Peeketi Akhil Reddy , Annabattula Ratna Kumar , Schenning Albert P. H. J. , Debije Michael G. 
Published: April 2024

AbstractLiquid crystal elastomer (LCE) actuators are generally limited in shape, size, and quantity by the need for aligning via stretching and fixing via photopolymerizing. A thermoplastic LCE is presented that may be vacuum thermoformed into centimeter‐sized hemispheres. The scalable industrial process induces LCE alignment without requiring postfixing. The hemispheres display remarkable properties, actuating with strains around 20% and transitioning from opaque and scattering to highly translucent upon heating: both the physical and optical effects are fully reversible. Simulations reveal the LCE experiences biaxial strains during processing, the magnitude varying as a function of location on the hemisphere: the resulting alignment describing the hemisphere actuation well. The thermoplastic LCE hemispheres may be combined to form complete spheres by simply heating the joint. The hemisphere can also be physically deformed into a ball which can then unfold back into the hemisphere again. By doping the hemispheres with photoswitches, fluorescent or photothermal dyes, devices are formed for light collection and redistribution, addressable water containers that may pour at will, and light‐responsive surfing devices. This is the first example of an LCE amenable to high‐volume industrial vacuum thermoforming which may lead to intricate 3D‐shaped actuators with new functional properties.
Highly Efficient and Stable Organic Photovoltaic Cells for Underwater Applications
Authors: Wang Yafei , Cui Yong , Wang Jianqiu , Xiao Yang , Chen Zhihao , Wang Wenxuan , Yu Yue , Yang Shiwei , Yu Runnan , Hao Xiaotao , Zhang Shaoqing , Hou Jianhui 
Published: April 2024

AbstractOrganic photovoltaic (OPV) technology holds tremendous promise as a sustainable power source for underwater off‐grid systems. However, research on underwater OPV cells is relatively scarce. Here, this gap is addressed by focusing on the exploration and development of OPV cells specifically designed for underwater applications. An acceptor, named ITO‐4Cl, with excellent water resistance, is rationally designed and synthesized. Benefiting from its low energetic disorder and an absorption spectrum well‐suited to the underwater environment, the ITO‐4Cl‐based OPV cell achieves an unprecedented power conversion efficiency (PCE) of over 25.6% at a water depth of 1 m. Additionally, under 660 nm laser irradiation, the cell demonstrates a notable PCE of 31.6%, indicating its potential for underwater wireless energy transfer. Due to the mitigation of thermal effects from solar irradiation, the lifetime of the ITO‐4Cl‐based OPV cell exceeds 7000 h. Additionally, a flexible OPV cell is fabricated that maintains its initial PCE even under exposure to high pressures of 5 MPa. A 32.5 cm2 flexible module achieves an excellent PCE of 17%. This work fosters a deeper understanding of underwater OPV cells and highlights the promising prospects of OPV cells for underwater applications.
Immunogenic Material Vaccine for Cancer Immunotherapy by Structure‐Dependent Immune Cell Trafficking and Modulation
Authors: Yang Wei , Cao Jianwei , Di Sichen , Chen Wenjin , Cheng Hui , Ren Hongze , Xie Yujie , Chen Liang , Yu Meihua , Chen Yu , Cui Xingang 
Published: April 2024

AbstractInherently immunogenic materials offer enormous prospects in enhancing vaccine efficacy. However, the understanding and improving material adjuvanticity remain elusive. Herein how the structural presentation of immunopotentiators in a material governs the dynamic dialogue between innate and adaptive immunity for enhanced cancer vaccination is reported. The immunopotentiator manganese into six differing structures that resemble the architectures of two types of pathogens (spherical viruses or rod‐like bacteria) is precisely manipulated. The results reveal that innate immune cells accurately sense and respond to the architectures, of which two outperformed material candidates (151 nm hollow spheres and hollow microrods with an aspect ratio of 4.5) show higher competence in creating local proinflammatory environment with promoted innate immune cell influx and stimulation on dendritic cells (DCs). In combination with viral peptides, model proteins, or cell lysate antigens, the outperformed microrod material remarkably primes antigen‐specific CD8 cytolytic T cells. In prophylactic and therapeutic regimens, the microrod adjuvanted vaccines display optimal aptitude in tumor suppression in four aggressive murine tumor models, by promoting the infiltration of heterogeneous cytolytic effector cells while decreasing suppressive immunoregulatory populations in tumors. This study demonstrates that a rationally selected architecture of immunogenic materials potentially advances the clinical reality of cancer vaccination.
Influence of Li Content on the Topological Inhibition of Oxygen Loss in Li‐Rich Cathode Materials
Authors: Chen Zhefeng , Zhang Wentao , Liu Jiajie , Zhang Mingzheng , Li Shunning , Pan Feng 
Published: April 2024

AbstractLithium‐rich layer oxide cathodes are promising energy storage materials due to their high energy densities. However, the oxygen loss during cycling limits their practical applications. Here, the essential role of Li content on the topological inhibition of oxygen loss in lithium‐rich cathode materials and the relationship between the migration network of oxygen ions and the transition metal (TM) component are revealed. Utilizing first‐principles calculations in combination with percolation theory and Monte Carlo simulations, it is found that TM ions can effectively encage the oxidized oxygen species when the TM concentration in TM layer exceeds 5/6, which hinders the formation of a percolating oxygen migration network. This study demonstrates the significance of rational compositional design in lithium‐rich cathodes for effectively suppressing irreversible oxygen release and enhancing cathode cycling performance.
Integrated Microwave Photonic Sensors Based on Microresonators
Authors: Tian Xiaoyi , Li Liwei , Nguyen Linh , Yi Xiaoke 
Published: April 2024

AbstractSensors stand as pivotal cornerstones of technology, driving progress across a spectrum of industries through their ability to precisely capture and interpret an extensive array of physical phenomena. Among these advancements, microwave photonic (MWP) sensing has emerged as a new sensing technique, elevating sensing speed and resolution for practical applications. Integrated MWP sensors exhibit unparalleled capabilities in ultra‐sensitive, label‐free nanoscale detection, offering the potential to synergize with advanced integration techniques for a compact footprint and versatile designs. This paper reviews and summarizes the development and recent advances in integrated MWP sensing, focusing on the schemes based on microresonators. The diverse array of existing schemes is systematically categorized, elucidating their operational principles and performance demonstration. Furthermore, the assistance of machine learning and deep learning in integrated MWP sensors is explored, highlighting the potential of intelligent sensing paradigms. Finally, current challenges and opportunities aimed at further advancing MWP sensors are discussed.
A Crystalline 2D Fullerene‐Based Metal Halide Semiconductor for Efficient and Stable Ideal‐bandgap Perovskite Solar Cells
Authors: Shen Weicheng , Azmy Ali , Li Guang , Mishra Anamika , Syrgiannis Zois , Zheng Wenwen , Volonakis George , Kepenekian Mikaël , Even Jacky , Wojtas Lukasz , Wang Cheng , Huang Lishuai , Chen Weiqing , Zhou Shun , Zhou Jin , Zeng Guojun , Pu Dexin , Guan Hongling , Fang Guojia , Ke Weijun , Spanopoulos Ioannis 
Published: April 2024

AbstractDespite advances in mixed tin‐lead (Sn‐Pb) perovskite‐based solar cells, achieving both high‐efficiency and long‐term device stability remains a major challenge. Current device deficiencies stem partly from inefficient carrier transport, originating from defects and improper band energy alignment among the device's interfaces. Developing multifunctional interlayer materials simultaneously addressing the above concerns poses an excellent strategy. Herein, through molecular and crystal engineering, an amine‐functionalized C60 mono‐adduct derivative (C60‐2NH3 = bis(2‐aminoethyl) malonate‐C60) is utilized for the synthesis of the first crystalline fullerene‐based 2D metal halide semiconductor, namely (C60‐2NH3)Pb2I6. Single crystal XRD studies elucidated the structure of the new material, while DFT calculations highlighted the strong contribution of C60‐2NH3 to the electronic density of states of the conduction band of (C60‐2NH3)Pb2I6. Utilization of C60‐2NH3 as an interlayer between a FA0.6MA0.4Pb0.7Sn0.3I3 perovskite and a C60 layer offered superior band energy alignment, reduced nonradiative recombination, and enhanced carrier mobility. The corresponding perovskite solar cell (PSC) device achieved a power conversion efficiency (PCE) value of 21.64%, maintaining 90% of its initial efficiency, after being stored under a N2 atmosphere for 2400 h. This work sets the foundation for developing a new family of functional materials, namely Fullerene Metal Halide Semiconductors, targeting applications from photovoltaics to catalysis, transistors, and supercapacitors.
Electron Odd‐Pearcey Gaussian Beams Propagating In a Constant Magnetic Field
Authors: Cai Xuezhen , Tang Huilin , Huang Haoyu , Wu Hailong , He Xingyi , Chen Yanru , Deng Dongmei 
Published: April 2024

AbstractIn this paper, the introduction of a novel type of electron beams known as electron odd‐Pearcey Gaussian beams (EOPGBs) is presented. For the first time, the dynamics of EOPGBs are explored propagating in both free space and a constant magnetic field by employing the Schrödinger equation. The investigation reveals that the electron beams exhibit remarkable auto‐focusing characteristics in these two media, and the focal length can be controlled by adjusting certain parameters. Additionally, in a constant magnetic field, EOPGBs exhibit intriguing properties, notably the dual auto‐focusing property, which sets them apart from other known electron beams. The probability currents and distribution factors are used to provide a theoretical explanation for the aforementioned features of EOPGBs. Furthermore, the conclusions are consistent with the results obtained from numerical simulations.
Quantitative Factors Introduced in the Feasibility Analysis of Reactive Oxygen Species (ROS)‐Sensitive Triggers
Authors: Kondengadan Shameer M. , Wang Binghe 
Published: April 2024

AbstractReactive oxygen species (ROS) are critical for cellular signaling. Various pathophysiological conditions are also associated with elevated levels of ROS. Hence, ROS‐sensitive triggers have been extensively used for selective payload delivery. Such applications are predicated on two key functions: (1) a sufficient magnitude of concentration difference for the interested ROS between normal tissue/cells and intended sites and (2) appropriate reaction kinetics to ensure a sufficient level of selectivity for payload release. Further, ROS refers to a group of species with varying reactivity, which should not be viewed as a uniform group. In this review, we critically analyze data on the concentrations of different ROS species under various pathophysiological conditions and examine how reaction kinetics affect the success of ROS‐sensitive linker chemistry. Further, we discuss different ROS linker chemistry in the context of their applications in drug delivery and imaging. This review brings new insights into research in ROS‐triggered delivery, highlights factors to consider in maximizing the chance for success and discusses pitfalls to avoid.
What doesn't fit is made to fit: Pim‐1 kinase adapts to the configuration of stilbene‐based inhibitors
Authors: Hochban Phil M. M. , Heyder Lukas , Heine Andreas , Diederich Wibke E. 
Published: April 2024

AbstractRecently, we have developed novel Pim‐1 kinase inhibitors starting from a dihydrobenzofuran core structure using a computational approach. Here, we report the design and synthesis of stilbene‐based Pim‐1 kinase inhibitors obtained by formal elimination of the dihydrofuran ring. These inhibitors of the first design cycle, which were obtained as inseparable cis/trans mixtures, showed affinities in the low single‐digit micromolar range. To be able to further optimize these compounds in a structure‐based fashion, we determined the X‐ray structures of the protein‐ligand‐complexes. Surprisingly, only the cis‐isomer binds upon crystallization of the cis/trans‐mixture of the ligands with Pim‐1 kinase and the substrate PIMTIDE, the binding mode being largely consistent with that predicted by docking. After crystallization of the exclusively trans‐configured derivatives, a markedly different binding mode for the inhibitor and a concomitant rearrangement of the glycine‐rich loop is observed, resulting in the ligand being deeply buried in the binding pocket.
Auswirkungen des Austausches einer Gasheizung gegen eine Außenluft‐Wärmepumpe im EFH
Authors: Döring Felix , Richter Torsten 
Published: April 2024

AbstractDer Gebäudebestand benötigt rund 30 % des gesamten Endenergiebedarfes in Deutschland. Der Erfolg der Wärmewende hängt daher maßgeblich vom Einsparpotenzial im Gebäudebestand ab. Dazu gehört neben der Sanierung der Gebäudehülle auch der Einsatz einer klimaneutralen Wärmebereitstellung. Für dieses Ziel ist es vorteilhaft und notwendig, die Anlagentechnik von fossilen auf erneuerbare Energieträger umzurüsten. Derzeit gilt zu Recht die Wärmepumpe als Schlüsseltechnologie für das Gelingen der Wärmewende. Dieser Beitrag untersucht den Autarkiegrad der Kombination Wärmepumpe mit Photovoltaikanlage genauer. Um den Autarkiegrad bestimmen zu können, wird für ein konkretes Praxisbeispiel eine Simulationsrechnung mit dem Programm PV*SOL erstellt. Als maßgebend für die Auswertung wird der lastgerechte Autarkiegrad in Abhängigkeit der damit verbundenen Investitionskosten bestimmt und dargestellt.
Was 2021–2022 an Annus Horribilis for teacher educators? Reflections on a survey of teacher educators
Authors: Wood Phil , Quickfall Aimee 
Published: April 2024

AbstractThe COVID pandemic temporarily altered the functioning of all sections of society. In England, it led to major disruption in the teacher education sector leading to curtailed training in schools and a rapid shift to alternative approaches to teaching and learning. By the 2021–2022 academic year, it was hoped that activity would return to a level of normalcy. However, the continued hangover of the pandemic together with the return of high‐stakes inspections by Ofsted, and a decision by the UK Government to instigate an accreditation process for all English initial teacher education (pre‐service teacher education) programmes, required to allow institutions to continue offering initial teacher education beyond 2024, all combined to create the potential for a very difficult year. We surveyed 159 teacher educators to capture reflections of their experiences form the 2021–2022 academic year, understanding their perceptions through the lens of the Job Demands‐Resources Model (Demerouti, E., Bakker, A. B., Nachreiner, F., & Schaufeli, W. B. (2001). Journal of Applied Psychology, 86(3), 499–512, 10.1037//0021‐9010.86.3.499) which identifies those factors which may lead to stress and burnout in the work environment (demands) and those which balance against this and offer emotional well‐being (resources). The results show a number of high demands over the course of the year, especially related to accreditation and Ofsted pressures, and the extra demands made by the overhang of the pandemic, all factors leading to increased workload. Counteracting these demands are the resources present, particularly the support between colleagues and a strong commitment and enjoyment gained form working with student teachers. However, the long‐term sustainability of the role of teacher educator is in question.