bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three‐stage feature selection approach for deep learning‐based RUL prediction methods
Authors: Wang Youdao , Zhao Yifan 
Published: February 2023

AbstractThe remaining useful life (RUL) prediction plays an increasingly important role in predictive maintenance. With the development of big data and the Internet‐of‐Things (IoT), deep learning (DL) techniques have been widely adopted for RUL prediction. Addressing the limitation of the current methods for data under multiple operating conditions, this paper proposes a three‐stage feature selection approach for DL‐based RUL prediction models. The k‐medoids cluster is initially used to sort raw data based on different operating conditions. In the first stage of feature selection, an operational‐based normalisation approach is applied to reconstruct the data. Afterwards, Spearman's rank and pair‐wise Pearson correlation coefficients are used to eliminate irrelevant and redundant features in the second and third stages, respectively. A case study using NASA's Commercial Modular Aero‐Propulsion System Simulation (C‐MAPSS) dataset is presented to quantitatively evaluate the influence of the proposed feature selection method using the Recurrent Neural Network (RNN) and its’ variants, enhanced by an optimised activation function and optimiser. The results confirm that the proposed method can improve the stability of DL models and achieve about a 7.3% average improvement in the RUL prediction for popular and state‐of‐the‐art DL models.
A novel concurrent learning‐based sliding‐mode observer for second‐order multivariable systems with a time‐varying coefficient: An application to machine vision
Authors: Keshavan J. 
Published: February 2023

AbstractThe problem of finite‐time state recovery for multivariable second‐order systems with a time‐varying coefficient is considered in this study. The key challenge lies in the time‐varying nature of the regressor coefficient, which possibly results in the lack of a well‐defined relative degree, and renders the synthesis of a finite‐time state observer difficult for such systems. In order to overcome this challenge, a novel multivariable sliding‐mode observer is developed that relies on an information‐rich term based on concurrent learning to ensure observer convergence. In particular, the concurrent learning‐based augmentation term leverages information contained in prior data, which is recorded over a sliding time window in the recent past, so that the resulting observer structure need only satisfy a relaxed observability condition for ensuring finite‐time convergence. A Lyapunov‐based stability analysis is undertaken to demonstrate finite‐time convergence of the observer estimates to a small uniform ultimate bound around the ground truth for a sufficiently large choice of observer gains. The observer is then applied to accomplish the task of structure and motion recovery from machine vision that involves tracking of a single stationary object feature by a moving camera across the image sequence. Numerical results are used to validate accurate observer performance in the presence of model uncertainty and measurement noise for weakly persistently exciting systems. Furthermore, a detailed comparison study with leading alternative designs is also included that demonstrates the superior performance of the proposed scheme. As the current approach precludes any reliance on a restrictive persistency of excitation condition that is difficult to satisfyapriori, an important advantage of the proposed scheme is its suitability to practical applications such as visual servo control.
Chronic stressors, coping strategies, and depressive symptoms: A comparison across older age groups
Authors: Sowan Wafaa , Rutin Renana , Cohen Miri 
Published: February 2023

AbstractLate‐life depression is a prevalent mental health problem among older adults. Variations may exist in the intensity of chronic stressors experienced by people in different older age groups and their effects on depressive symptoms. To examine differences among older adults by age group in the experienced intensity of chronic stressors in relation to coping strategies and depressive symptoms. Participants were 114 older adults. The sample was divided into three age groups: 65–72, 73–81, and 82–91. The participants completed questionnaires on coping strategies, depressive symptoms, and chronic stressors. Moderation analyses were conducted. The lowest levels of depressive symptoms were in the young‐old age group and the highest levels were in the oldest‐old age group. The young‐old age group used more engaged and less disengaged coping strategies than the two other groups. The association between intensity of chronic stressors and depressive symptoms was stronger in the two older age groups compared to the youngest (moderating effect of age groups). Differences exist in the relationships among chronic stressors, coping strategies, and depressive symptoms by age groups in the older adult population. Professionals should be aware of the possible differences between age groups in depressive symptoms and the impact of stressors on depressive symptoms in different older adult age groups.
Advanced Composite Solid Electrolytes for Lithium Batteries: Filler Dimensional Design and Ion Path Optimization
Authors: Zheng Feifan , Li Chunwei , Li Zongcheng , Cao Xin , Luo Hebin , Liang Jin , Zhao Xiaodong , Kong Jie 
Published: February 2023

AbstractComposite solid electrolytes are considered to be the crucial components of all‐solid‐state lithium batteries, which are viewed as the next‐generation energy storage devices for high energy density and long working life. Numerous studies have shown that fillers in composite solid electrolytes can effectively improve the ion‐transport behavior, the essence of which lies in the optimization of the ion‐transport path in the electrolyte. The performance is closely related to the structure of the fillers and the interaction between fillers and other electrolyte components including polymer matrices and lithium salts. In this review, the dimensional design of fillers in advanced composite solid electrolytes involving 0D–2D nanofillers, and 3D continuous frameworks are focused on. The ion‐transport mechanism and the interaction between fillers and other electrolyte components are highlighted. In addition, sandwich‐structured composite solid electrolytes with fillers are also discussed. Strategies for the design of composite solid electrolytes with high room temperature ionic conductivity are summarized, aiming to assist target‐oriented research for high‐performance composite solid electrolytes.
Synthesizing Cr‐Based Two‐Dimensional Conjugated Metal‐Organic Framework Through On‐Surface Substitution Reaction
Authors: Zhong Weiliang , Zhang Tingfeng , Chen Dan , Su Nuoyu , Miao Guangyao , Guo Jiandong , Chen Long , Wang Zhengfei , Wang Weihua 
Published: February 2023

AbstractA single‐layer Cr3(HITP)2 (HITP = 2,3,6,7,10,11‐hexaiminotriphenylene) conjugated metal‐organic framework (c‐MOF) is synthesized under ultrahigh vacuum conditions by substituting Cr for Ni in Ni3(HITP)2 template. As revealed by low‐temperature scanning tunneling microscopy and scanning tunneling spectroscopy, while codeposition of Cr atoms and 2,3,6,7,10,11‐hexaaminotriphenylene precursors produces irregular branches, crystalline Cr3(HITP)2 frameworks are obtained by depositing Cr atoms to the Ni3(HITP)2 templates. The density functional theory calculations reveal that the binding energy between Cr and HITP ligands is much higher than that for Ni, which hampers the growth of crystalline Cr3(HITP)2 frameworks through direct coordination assembly but makes the substitution reaction energetically favorable. This work demonstrates a new strategy to prepare high‐quality early‐transition‐metal‐based c‐MOFs under ultrahigh vacuum conditions.
Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots
Authors: Zhang Yongqiang , Wang Lu , Hu Yongsheng , Sui Laizhi , Cheng Liwen , Lu Siyu 
Published: February 2023

AbstractAs a new type of solution‐processed nano‐laser material, carbon dots (CDs) have shown considerable potential in optical communication, laser displays, micro/nano processing, and biomedicine. Reducing the laser threshold of the gain material is of considerable significance for further development of CDs’ applications in the field of micro/nano lasers. A series of blue‐emissive CDs (B‐CDs) are synthesized by changing the molar ratios of the precursors (citric acid (CA): L‐Cysteine (L‐Cys)). B‐CDs have a structure of carbon nanoparticles with their surface being modified with 5‐oxo‐3,5‐dihydro‐2Hthiazolo [3,2‐a]pyridine‐7‐carboxylic acid (TPCA). The laser can only be generated when the molar ratio of the precursors is between 1:1 and 2:1. With an increase in this ratio, the laser threshold decreases from 341.6 to 165.5 mJ cm−2. The decrease in the laser threshold is attributed to the increase in the radiation transition rate and centralized sp3‐related excited state levels, which are favorable for light amplification and population inversion. These results will be instructional for the reasonably design of CDs‐based laser materials and prompt their potential use in practical photonics.
Platinum Drug‐Incorporating Polymeric Nanosystems for Precise Cancer Therapy
Authors: Liu Wei , Li Xin , Wang Ting , Xiong Fei , Sun Changrui , Yao Xikuang , Huang Wei 
Published: February 2023

AbstractPlatinum (Pt) drugs are widely used in clinic for cancer therapy, but their therapeutic outcomes are significantly compromised by severe side effects and acquired drug resistance. With the emerging immunotherapy and imaging‐guided cancer therapy, precise delivery and release of Pt drugs have drawn great attention these days. The targeting delivery of Pt drugs can greatly increase the accumulation at tumor sites, which ultimately enhances antitumor efficacy. Further, with the combination of Pt drugs and other theranostic agents into one nanosystem, it not only possesses excellent synergistic efficacy but also achieves real‐time monitoring. In this review, after the introduction of Pt drugs and their characteristics, the recent progress of polymeric nanosystems for efficient delivery of Pt drugs is summarized with an emphasis on multi‐modal synergistic therapy and imaging‐guided Pt‐based cancer treatment. In the end, the conclusions and future perspectives of Pt‐encapsulated nanosystems are given.
Recent Progress on Honeycomb Layered Oxides as a Durable Cathode Material for Sodium‐Ion Batteries
Authors: Yao Huan , Li Haoyu , Ke Bingyu , Chu Shiyong , Guo Shaohua , Zhou Haoshen 
Published: February 2023

AbstractSodium‐ion batteries (SIBs) are becoming promising candidates for energy storage devices due to the low cost, abundant reserves, and excellent electrochemical performance. As the most important unit, layered cathodes attract much attention, where honeycomb‐layered‐oxides (HLOs) manifest outstanding structural stability, high redox potential, and long‐life electrochemistry. Here, recent progress on HLOs as well as Na3Ni2SbO6 and Na3Ni2BiO6 as two representative materials are introduced, and the crystal and electronic structure, electrochemical performance, and modification strategies are summarized. The advanced high nickel HLOs are highlighted toward development of state‐of‐the‐art sodium‐ion batteries. This review would deepen the understanding of superstructure in layered oxides, as well as structure–property relationship, and inspire more interest in high output voltage, long lifespan sodium‐ion batteries.
Hybrid Lead‐Free Metal Antimony Oxide Chlorides with Highly Efficient Blue Light Emissions
Authors: Wang Ming‐Feng , Feng Li‐Juan , Lou Hui‐Ru , Wang Ri‐Cheng , Wang Yue , Hu Xiu‐Rui , Feng Ying , Lei Xiao‐Wu , Wang Yu‐Yin 
Published: February 2023

AbstractHerein, we report two hybrid zero‐dimensional (0D) lead‐free metal oxide halides of [PPip]Sb2Cl6O (1) ([PPip]=1‐(2‐Pyridyl)piperazine) and [PmPip]Sb2Cl6O (2) ([PmPip]=1‐(2‐Pyrimidyl)piperazine). Compounds1and2are able to exhibit narrow blue light emissions excited by UV light with photo‐luminescence quantum yields (PLQYs) of 25.49 % and 24.71 %, respectively. Through systematical characterizations, these blue light emissions can be attributed to the radiative transition in conjugated organic cations. Benefiting from the highly efficient intrinsic blue emissions, compound2can be used as blue fluorophor to fabricate liquid crystal display. This work provides a new to assembly blue emitter through by virtue of the optical active organic cations in hybrid materials.
Einleitung
Authors: Mäsgen Johanna 
Published: February 2023

ZusammenfassungDie Einleitung beschreibt den bildungspolitischen Wandel, der zur Einführung beziehungsweise funktionalen Umdeutung des Zentralabiturs und zu veränderten Lehrplänen in den deutschen Bundesländern geführt hat. Außerdem wird ein Überblick über den Forschungsstand und Forschungsdesiderate gegeben. Daraufhin wird die Stellung der Arbeit zwischen fachlicher Bildungsforschung, geographiedidaktischer und bildungssoziologischer Forschung erläutert. Das Ziel der Untersuchung wird dann aus einem strukturtheoretischen Verständnis von Profession heraus als das Nachvollziehen verschiedener Möglichkeiten kontingenten Handelns vorgestellt und damit die metatheoretische Rahmung durch die Systemtheorie nach Luhmann begründet. Die forschungsleitende Frage „Wie ist Geographieunterricht angesichts des Zentralabiturs möglich?“ wird anhand von Subfragen präzisiert, denen in zwei Studien – einer quantitativen Analyse der Aufgabenkultur im Zentralabitur und einer qualitativen Interviewstudie zum Lehrer_innenhandeln angesichts des Zentralabiturs – nachgegangen wird. Schließlich werden zentrale Ergebnisse zu den Auswirkungen von Standardisierung und die Gliederung der Arbeit vorgestellt.
Theoretische Konzeption
Authors: Mäsgen Johanna 
Published: February 2023

ZusammenfassungIn diesem Kapitel wird der metatheoretische und theoretische Bezugsrahmen der Arbeit gesetzt. Zunächst wird in Abschnitt 2.1 die Frage nach der Möglichkeit von Unterricht entwickelt und systemtheoretisch vorangetrieben, indem das Erziehungssystem als Funktionssystem der Gesellschaft, Unterricht als Interaktionssystem und Schulorganisation als Organisationssystem gefasst werden. Aus diesen Überlegungen werden vier Leitperspektiven für die vorliegende Arbeit abgeleitet und in Abschnitt 2.1 anhand des Forschungsstandes ausgearbeitet: (1) Unterricht als komplexe Interaktionssituation und Prüfungen; (2) Die „falsche Sprache“? Einflüsse von außen; (3) Das Zentralabitur und seine vorgelagerten organisatorischen Regularien als pädagogische Programme – Scheintechnologie als Technologieersatz und (4) Entscheidungen der Schulorganisation und ihr Rationalitätsdefizit. Dabei erfolgt jeweils zunächst eine allgemeine, zweitens eine das Zentralabitur aufgreifende und drittens eine das Fach Geographie betreffende Darstellung. Das Kapitel schließt in Abschnitt 2.3 mit einer Synthese, in der das Zentralabitur im Fach Geographie und seine Auswirkungen als Forschungsgegenstände herausgearbeitet werden.
Forschungsdesign
Authors: Mäsgen Johanna 
Published: February 2023

ZusammenfassungIn diesem Kapitel wird die konstruktivistische wissenschaftstheoretische Position und das Forschungsziel Reflexionsimpuls vorgestellt. Außerdem wird die Forschungsmethodik der beiden empirischen Studien erläutert: bei der quantitativen Studie zur Aufgabenkultur die ikmultivariate Verfahren), bei der qualitativen Interviewstudie zum Lehrer_innenhandeln angesichts des Zentralabiturs die Datenerhebung (Fallauswahl, Erhebungsinstrument) und die Datenauswertung angelehnt an die Grounded Theory Methodologie. Schließlich wird die Vorgehensweise in den beiden Studien kritisch reflektiert.
Eigene empirische Perspektiven auf die forschungsleitende Frage: Wie ist Geographieunterricht angesichts des Zentralabiturs möglich?
Authors: Mäsgen Johanna 
Published: February 2023

ZusammenfassungDieses Kapitel widmet sich den Ergebnissen der beiden empirischen Studien. In Abschnitt 4.1 werden die Ergebnisse der quantitativen Analyse der Aufgabenkultur im Zentralabitur in fünf ausgewählten Bundesländern vorgestellt: eine geringe Standardisierung auf Bundes- und eine stärkere Standardisierung auf Bundesländerebene. Abschnitt 4.2 widmet sich den Ergebnissen der qualitativen Interviewstudie, dem Handeln von Geographielehrer_innen angesichts des Zentralabiturs: zunächst der Bandbreite an Aussagen zum Zusammenspiel von Zentralabitur, Unterricht und unterrichtlichen Klausuren, dann einer Typologie der aktualen Gestaltung von Unterricht angesichts des Zentralabiturs („Gestaltungsarme Routine“, „Sich arrangieren“, „Festtage gestalten“ „Das Gestalten gestalten“ und „Sich reiben“) und schließlich einer Einordnung der analysierten Einzelfälle in die Idealtypologie.
Fazit und Ausblick
Authors: Mäsgen Johanna 
Published: February 2023

Zusammenfassung„Diese Vorbemerkungen versorgen uns mit Schwierigkeiten, von denen wir im Folgenden profitieren wollen“. Diese Arbeit schließt mit drei Einsichten, die entlang dieses Zitates entwickelt werden. Erstens handelt es sich um erste Forschungsergebnisse zum Zentralabitur im Fach Geographie und zum Unterricht angesichts des Zentralabiturs im Fach Geographie („Vorbemerkungen“). Zweitens liefert sie zwar eine vertiefte Problemanalyse („Schwierigkeiten“), aber keine eindeutigen Lösungen. Drittens bietet sie aber Reflexionspotential („profitieren“).
Simply Complete Hom-Lie Superalgebras and Decomposition of Complete Hom-Lie Superalgebras
Authors: Farhangdoost Mohammed Reza , Attari Polsangi Ahmad Reza , Silvestrov Sergei 
Published: February 2023

AbstractComplete hom-Lie superalgebras are considered and some equivalent conditions for a hom-Lie superalgebra to be a complete hom-Lie superalgebra are established. In particular, the relation between decomposition and completeness for a hom-Lie superalgebra is described. Moreover, some conditions that the linear space of $$\alpha ^{s}$$

α
s

-derivations of a hom-Lie superalgebra to be complete and simply complete are obtained.
MiR-422a promotes adipogenesis via MeCP2 downregulation in human bone marrow mesenchymal stem cells
Authors: Giuliani Angelica , Sabbatinelli Jacopo , Amatori Stefano , Graciotti Laura , Silvestrini Andrea , Matacchione Giulia , Ramini Deborah , Mensà Emanuela , Prattichizzo Francesco , Babini Lucia , Mattiucci Domenico , Busilacchi Elena Marinelli , Bacalini Maria Giulia , Espinosa Emma , Lattanzio Fabrizia , Procopio Antonio Domenico , Olivieri Fabiola , Poloni Antonella , Fanelli Mirco , Rippo Maria Rita 
Published: February 2023

AbstractMethyl-CpG binding protein 2 (MeCP2) is a ubiquitous transcriptional regulator. The study of this protein has been mainly focused on the central nervous system because alterations of its expression are associated with neurological disorders such as Rett syndrome. However, young patients with Rett syndrome also suffer from osteoporosis, suggesting a role of MeCP2 in the differentiation of human bone marrow mesenchymal stromal cells (hBMSCs), the precursors of osteoblasts and adipocytes. Here, we report an in vitro downregulation of MeCP2 in hBMSCs undergoing adipogenic differentiation (AD) and in adipocytes of human and rat bone marrow tissue samples. This modulation does not depend on MeCP2 DNA methylation nor on mRNA levels but on differentially expressed miRNAs during AD. MiRNA profiling revealed that miR-422a and miR-483-5p are upregulated in hBMSC-derived adipocytes compared to their precursors. MiR-483-5p, but not miR-422a, is also up-regulated in hBMSC-derived osteoblasts, suggesting a specific role of the latter in the adipogenic process. Experimental modulation of intracellular levels of miR-422a and miR-483-5p affected MeCP2 expression through direct interaction with its 3′ UTR elements, and the adipogenic process. Accordingly, the knockdown of MeCP2 in hBMSCs through MeCP2-targeting shRNA lentiviral vectors increased the levels of adipogenesis-related genes. Finally, since adipocytes released a higher amount of miR-422a in culture medium compared to hBMSCs we analyzed the levels of circulating miR-422a in patients with osteoporosis—a condition characterized by increased marrow adiposity—demonstrating that its levels are negatively correlated with T- and Z-scores. Overall, our findings suggest that miR-422a has a role in hBMSC adipogenesis by downregulating MeCP2 and its circulating levels are associated with bone mass loss in primary osteoporosis.
Sensor fusion and the application of artificial intelligence to identify tool wear in turning operations
Authors: Al-Azmi A. , Al-Habaibeh Amin , Abbas Jabbar 
Published: February 2023

AbstractThis paper aims to develop an effective sensor fusion model for turning processes for the detection of tool wear. Fusion of sensors’ data combined with novelty detection algorithm and learning vector quantisation (LVQ) neural networks is used to detect tool wear and present diagnostic and prognostic information. To reduce the number of sensors required in the monitoring system and support sensor fusion, the ASPS approach (Automated Sensor and Signal Processing Selection System) is used to select the most appropriate sensors and signal processing methods for the design of the condition monitoring system. The experimental results show that the proposed approach has demonstrated its efficacy in the implementation of an effective solution for the monitoring tool wear in turning. The results prove that the fusion of sensitive sensory characteristic features and the use of AI methods have been successful for the detection and prediction of the tool wear in turning processes and show the capability of the proposed approach to reduce the complexity of the design of condition monitoring systems and the development of a sensor fusion system using a self-learning method.
A Bloch–Ogus theorem for henselian local rings in mixed characteristic
Authors: Schmidt Johannes , Strunk Florian 
Published: February 2023

AbstractWe show a conditional exactness statement for the Nisnevich Gersten complex associated to an $$\mathbb {A}^1$$

A

1

-invariant cohomology theory with Nisnevich descent for smooth schemes over a Dedekind ring with only infinite residue fields. As an application we derive a Nisnevich analogue of the Bloch–Ogus theorem for étale cohomology over a henselian discrete valuation ring with infinite residue field.