bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of the performance and dynamics of the asymmetric single‐sided and symmetric double‐sided vibro‐impact nonlinear energy sinks with optimized designs
Authors: Lizunov Petro , Pogorelova Olga , Postnikova Tetyana 
Published: September 2024

AbstractThe operation of symmetric double‐sided and asymmetric single‐sided vibro‐impact nonlinear energy sinks (DSVI NES and SSVI NES) is considered in this study. The methodology of optimization procedures is described. It is emphasized that the execution of optimization procedures is ambiguous, allows for a great deal of arbitrariness, and requires experience and intuition on the part of the implementer. There are a lot of damper parameter sets providing similar attenuation of the primary structure (PS) vibrations. It is shown that the efficiency of such mitigation for both VI NES types with optimized parameters is similar. However, their dynamic behavior differs significantly. The system with the attached DSVI NES exhibits calm dynamics with periodic motion and symmetrical bilateral impacts on both obstacles. The system with attached SSVI NES exhibits rich complex dynamics when the exciting force frequency is varied. Periodic modes of different periodicity with different numbers of asymmetric impacts per cycle on the PS directly and on the obstacle alternate with various irregular regimes, namely, chaotic mode, intermittency, and crisis‐induced intermittency. The regions of bilateral impacts are narrow and located near resonance; they are narrower for a system with an attached DSVI NES. In a system with an attached SSVI NES, there are wider areas of asymmetric unilateral impacts.
A probabilistic uncertain linguistic approach for FMEA‐based risk assessment
Authors: Tang Yingwei , Zhou Dequn , Zhu Shichao , Ouyang Linhan 
Published: September 2024

AbstractFailure Mode and Effect Analysis (FMEA) is acknowledged as a beneficial instrument for identifying and mitigating system failures. However, the traditional FMEA method has its limitations. For instance, crisp numbers fail to adequately represent the intricate information and cognitive nuances of experts. Additionally, the conventional approach overlooks the significance of weights assigned to FMEA experts and risk factors (RFs). Furthermore, the simplistic ranking of failure modes in traditional FMEA does not accurately reflect priorities. In light of these drawbacks, this paper introduces an innovative, fully data‐driven FMEA method, leveraging a probabilistic uncertain linguistic term sets (PULTSs) environment and the Weighted Aggregates Sum Product Assessment (WASPAS) method. In the assessment process, PULTSs serve as linguistic tools that express probability distribution, allowing for a more reasonable and precise description of information. To address the issue of weights for RFs, the regret theory and Modified CRITIC method are employed. Subsequently, the WASPAS method is applied to determine the risk rankings of failure modes. To illustrate the feasibility and rationality of this novel FMEA model, the paper includes an example involving the production of Lithium‐ion batteries. To emphasize the excellence of the proposed FMEA model, sensitivity and comparative analyses are carried out.
Conditions for improved accuracy of noninvasive preimplantation genetic testing for aneuploidy: Focusing on the zona pellucida and early blastocysts
Authors: Takeuchi Hiroki , Morishita Midori , Uemura Midori , Maezawa Tadashi , Shibahara Takashi , Takayama Erina , Nishioka Mikiko , Kondo Eiji , Minoura Hiroyuki , Ikeda Tomoaki 
Published: September 2024

AbstractPurposeRecently, noninvasive preimplantation genetic testing for aneuploidy (niPGT‐A) using cell‐free deoxyribonucleic acid has been developed; however, there are few reports on this and the results are inconsistent. This study was conducted to optimize the cultural environment.MethodsWe used 35 blastocysts that had been discarded after in‐vitro fertilization. The concordance rate of karyotype analysis results between whole embryos (WEs), spent culture mediums (SCMs), and trophectoderms after 8, 16, and 24 h of culture was examined. Next, zona pellucida (ZP)‐free blastocysts and then early blastocysts were cultured for 24 h each.ResultsRegarding the optimal culture times, the concordance rate between WEs and SCMs was 20%, 60%, and 100% at 8, 16, and 24 h, respectively. Significant differences were found between 8 and 24 h. The concordance rate with ZP cultures was 40.0%, and no significant differences were found. The concordance rate of early blastocysts thawed and cultured for 24 h was 40.0%, which was significantly lower than that of day 5 blastocysts.ConclusionsThe optimal culture times for niPGT‐A were 24 h, and the concordance rate with free ZP was higher. The concordance rate for early blastocysts was low, suggesting that optimization of the conditions may be necessary.
Asynchronous event‐triggered control for switched T–S fuzzy systems under dual‐channel hybrid cyber attacks
Authors: Tan Xiangtong , Li Xiehuan , Zong Guangdeng 
Published: September 2024

AbstractThis article presents an asynchronous event‐triggered scheme for switched Takagi–Sugeno (T–S) fuzzy systems against dual‐channel hybrid cyber attacks. Different from existing results, both sensor and controller channels are subjected to aperiodic denial‐of‐service attacks and random false data injection attacks. To efficiently utilize dual‐channel network communication resources while resisting hybrid attacks, two resilient event‐triggered mechanisms (ETMs) are constructed. Considering asynchronous ETMs and hybrid cyber attacks, the time‐delay switched T–S fuzzy system is derived by utilizing model transformation methods. Thereby, the stability conditions are derived by utilizing multiple Lyapunov functions technique, and slack matrices are introduced to further relax the conditions. Finally, two examples are given to demonstrate the effectiveness of the developed event‐based security control strategy.
Light‐Modulated Humidity Sensing in Spiropyran Functionalized MoS2 Transistors
Authors: Tamayo Adrián , Danowski Wojciech , Han Bin , Jeong Yeonsu , Samorì Paolo 
Published: September 2024

AbstractThe optically tuneable nature of hybrid organic/inorganic heterostructures tailored by interfacing photochromic molecules with 2D semiconductors (2DSs) can be exploited to endow multi‐responsiveness to the exceptional physical properties of 2DSs. In this study, a spiropyran‐molybdenum disulfide (MoS2) light‐switchable bi‐functional field‐effect transistor is realized. The spiropyran‐merocyanine reversible photo‐isomerization has been employed to remotely control both the electron transport and wettability of the hybrid structure. This manipulation is instrumental for tuning the sensitivity in humidity sensing. The hybrid organic/inorganic heterostructure is subjected to humidity testing, demonstrating its ability to accurately monitor relative humidity (RH) across a range of 10%–75%. The electrical output shows good sensitivity of 1.0% · (%) RH−1. The light‐controlled modulation of the sensitivity in chemical sensors can significantly improve their selectivity, versatility, and overall performance in chemical sensing.
Ru@NiMoS aggregate with boosted electrochemical catalysis for enhanced electrochemiluminescence and lidocaine detection
Authors: Lu Yongzhuang , Wang Haoran , Li Qiyao , Liu Qian , Zhang Xiaoxu , Jia Yuying , Cai Xiangyu , Zhao Zheng , Huan Yanfu , Tang Ben Zhong 
Published: September 2024

AbstractA binder‐free Ru@NiMoS electrode was engineered by in situ growth of two‐dimensional NiMoS nanosheets on nickel foam. This process effectively promoted the electrostatic‐driven aggregation of Ru(bpy)32+, harnessing the synergistic effect to enhance electrochemiluminescence (ECL) performance. The integration (Ru@NiMoS) achieved an impressive ECL efficiency of 70.1%, marking an impressive 36.9‐fold enhancement over conventional Ru. Additionally, its ECL intensity was found to be remarkably 172.2 times greater than that of Ru. Within the Ru(bpy)32+/TPA system, NiMoS emerged as a pivotal electrochemical catalyst, markedly boosting both the oxygen evolution reaction and the generation of reactive intermediates. Leveraging these distinctive properties, a highly efficient ECL sensor for lidocaine detection was developed. This sensor exhibited a linear response within the concentration range of 1 nM to 1 μM and achieved a remarkably low detection limit of 0.22 nM, underlining its substantial potential for practical application.
Large scale system design aided by modelling and DES simulation: A Petri net approach
Authors: Arronategui Unai , Bañares José Ángel , Colom José Manuel 
Published: September 2024

AbstractThe study of real discrete event systems requires the use of models to cope with complexity and large scale. The only way to understand and analyse their behaviour prior to implementation is, in practice, through distributed simulation. Although it is a widely studied discipline, the difficulty of developing efficient distributed simulation code remains a challenge. The use of model driven engineering approaches allows a smooth way from informal specifications to executable code showing traces of the system behaviour. Formal models allow to conduct the phases of this engineering process, and in this work, the formalism is Petri nets. In the simulation literature, Petri nets have been shown to be particularly suitable for modelling and simulation of discrete event systems. This article reviews the role of Petri nets as the core formalism to support a model‐driven engineering approach for the execution of large scale models using distributed simulation. It deals with different aspects related to the Petri net‐based languages used at different stages of the modelling and simulation process, from conceptual modelling of complex systems to the generation of code for executing simulations of Petri net‐based models. After the review, the article proposes an efficient representation of Petri net‐based models. It is analysed from the perspective of the essential properties required for distributed simulation, and was found to provide efficient execution, scalability and dynamic configuration. The article highlights the importance of considering modelling constraints in order to guarantee good properties such as liveness and structural boundedness of Petri net components for the execution of large‐scale Petri net models. The Petri net‐based methodology is illustrated from the perspective of the impact of the formalism to help developing well‐formed models and efficient code for distributed simulation.
Single Crystalline Laser Welding
Authors: Bernhard Robert , Buchbender Irene , Wesling Volker , Kaierle Stefan 
Published: September 2024

AbstractRising demands on engines in the aerospace industry require high engine inlet temperatures in modern gas turbines in order to increase the efficiency. Single-crystal nickel-based superalloys were developed in order to meet these rising demands and confer high pressure turbine blades with the necessary wear and oxidation resistance at high temperatures. The blades of the high-pressure turbine are subject to significant wear due to the high mechanical strain under extreme conditions, which appears in the form of cracks in the single-crystal substrate material. There are no approaches for the restoration of the original material properties since the repair of cracks and erosions by polycrystalline laser cladding can be applied only to a limited extent. The aim of the subproject is the restoration of defect, single-crystal high-pressure turbine blades. This objective was achieved by developing a novel two-stage laser metal deposition process based on simulation, laser process development, process monitoring and temperature control.
Interaction of Combined Module Variances and Influence on the Overall System Behaviour
Authors: Goeing Jan , Friedrichs Jens 
Published: September 2024

AbstractWithin the Collaborative Research Centre 871, geometrical variances caused by repair procedures and deterioration are evaluated for the turbomachinery of a high-bypass aircraft engine. Part of this evaluation is the investigation of the influence of isolated and combined geometric variances on the overall aircraft engine performance. For this purpose, a virtual twin of a research aircraft engine is developed in sub-project D6. This virtual aircraft engine is based on the Pseudo Bond Graph approach, which allows for transient manoeuvres and the effects of interactions to be simulated with a higher degree of accuracy compared to conventional methods. After validation of the model, a design of experiments is performed to analyse the sensitivities between the variances of modules and engine performance. Within the sensitivity analysis, it is shown that the evaluated steady-state and transient performances are mainly influenced by the high-pressure modules, especially by the mass flow and efficiency variances. Furthermore, it is shown that the sensitivities strongly depend on the operating points. However, significant interactions are found which can be attributed to both the high-pressure and low-pressure modules.
Exhaust Jet Analysis
Authors: Armanidis Konstantinos , Kurth Sebastian , Nghiem Viet , Seume Joerg R. 
Published: September 2024

AbstractThe aim of project A3 of the Collaborative Research Centre (CRC) 871 is to develop a novel method for automated condition assessment of aircraft engines. The method is based on a combination of numerical simulations, Background Oriented Schlieren (BOS) measurements, and the use of pattern recognition algorithms. The density distribution in the exhaust gas stream of the engine is first measured using the BOS method and then compared with a damage library which was generated numerically through CFD. The automated classification of damage cases can be realized using pattern recognition algorithms. In the third funding period of the CRC, existing reconstruction algorithms used for the calculation of the density distribution in the exhaust gas were improved to increase the accuracy of the BOS measurements. Subsequently, the method was tested experimentally. First, experiments with a model combustion chamber show that 98.5% of all damage cases can be correctly classified by a suitable choice of integral parameters to describe the density distribution in the exhaust gas jet. In a second experimental test, the method was applied to a research engine in order to take realistic impacts into account.
The Great East Japan Earthquake and the Fukushima Nuclear Accident
Authors: Inatsugu Hiroaki 
Published: September 2024

AbstractWith a magnitude of 9.0, the Great East Japan Earthquake of 11 March 2011 was the largest earthquake ever recorded in Japan. The subsequent tsunami caused extensive damage in the Tohoku region. Furthermore, the unforeseen Fukushima nuclear power plant accident was extremely devastating as well. Local governments and the central government, which had prepared for disaster response based on their experience with previous earthquakes, responded immediately and worked quickly to restore and rebuild afterwards. Reconstruction was largely completed ten years later. However, as there was no knowledge of the nuclear accident, the response was delayed, and subsequent recovery is still in the process of completion. Further efforts should be made from a long-term perspective.
The Welfare State in Japan
Authors: Kitayama Toshiya 
Published: September 2024

AbstractCan Japan be classified as a welfare state? If so, why and how? Both experts on Japan and welfare state students have asked this question. In Varieties of Capitalism (VoC) literature, Japan is classified as one of firm-specific coordinated market economies. However, according to welfare state classification a la Esping-Andersen, locating Japan among the three worlds of welfare capitalism is difficult.This chapter attempts to explore this ambiguity by examining the relevant historical developments in Japan. It demonstrates how Japan started to emulate German model but learned also from the Nordic approaches to construct eclectic and unique welfare state. This welfare state also complements the firm-specific coordinated market economy of Japan.It also argues that one important characteristic of the Japanese welfare state is the general welfare provided through work and that welfare policies in a narrower sense are not sufficient to understand the overall welfare provided to the Japanese. We need to examine not only the welfare regime but also the employment regime. This chapter concludes by referring to the recent changes in employment regime and political institutions and how they affect the welfare regime.
Problemaufriss – Ethik in Pflegekammern: Warum und wie?
Authors: Kuhn Andrea 
Published: September 2024

ZusammenfassungIn deutschen Bundesländern entstehen in der letzten Dekade vermehrt Pflegekammern als Selbstverwaltungsorgane und beruflichen Vertretungen der Profession Pflege. Nachdem Pflegekammern über lange Jahre als fehlender Baustein zur Professionalisierung gehandelt wurden, um den es sich auf politischer Ebene zu kümmern gilt, wurden sie in einigen Bundesländern Wirklichkeit. Der Problemaufriss umreißt die rechtliche Konstitution, den Auftrag und das offene ethische Mandat von Pflegekammern mit dem Ziel einer theoriegenerierende Grundlegung für passgenaue Interventionen zur Bearbeitung dieses Mandats des Heilberufs Pflege.
Chaotic Dynamics at the Boundary of a Basin of Attraction via Non-transversal Intersections for a Non-global Smooth Diffeomorphism
Authors: Fontich Ernest , Garijo Antonio , Jarque Xavier 
Published: September 2024

AbstractIn this paper, we give analytic proofs of the existence of transversal homoclinic points for a family of non-globally smooth diffeomorphisms having the origin as a fixed point which come out as a truncated map governing the local dynamics near a critical period three-cycle associated with the Secant map. Using Moser’s version of Birkhoff–Smale’s theorem, we prove that the boundary of the basin of attraction of the origin contains a Cantor-like invariant subset such that the restricted dynamics to it is conjugate to the full shift of N-symbols for any integer $$N\ge 2$$

N
≥
2

or infinity.
Habitat trumps biogeography in structuring coral reef fishes
Authors: Bellwood David R. , Tebbett Sterling B. 
Published: September 2024

AbstractAs one of the world’s most diverse ecosystems, coral reefs have been the focus of numerous biogeographic analyses. With strong biodiversity gradients across the Indo-Pacific, coral reefs have shed light on the effects of evolutionary history, isolation, and human exploitation on local assemblages. However, there are also strong environmentally driven local gradients in faunal assemblages. We ask, does reef fish community composition and trait space vary to a greater extent across small scales (i.e. along habitat gradients) or across large scales (i.e. across geographic regions separated by up to 12,000 km)? Using a standardized survey method that explicitly includes habitats (i.e. the slope, crest, and flat), we surveyed a highly diverse family of reef fishes (Labridae) in nine regions across the Indo-Pacific, from the Cocos (Keeling) Islands to French Polynesia. We demonstrate that small-scale habitat gradients represent a greater axis of variation, in both the taxonomic and trait composition of fish assemblages, than large-scale biogeographic gradients. Indeed, fish assemblages just 10 m apart, along a habitat gradient, appear to differ more than assemblages in the same habitats separated by over 12,000 km along the world’s largest biodiversity gradient. Essentially, fish assemblages cluster by habitat regardless of their biogeographic region, with habitat associations trumping biogeographic affiliations. This emphasizes the primacy of local environmental factors, such as hydrodynamics, in shaping the ecology of reef fishes. It also raises serious concerns over the use of combined datasets, where data from different habitats are used, without explicit recognition, in global-scale analyses.
Molecular age prediction using skull bone samples from individuals with and without signs of decomposition: a multivariate approach combining analysis of posttranslational protein modifications and DNA methylation
Authors: Becker J. , Bühren V. , Schmelzer L. , Reckert A. , Eickhoff S. B. , Ritz S. , Naue J. 
Published: September 2024

Abstract
The prediction of the chronological age of a deceased individual at time of death can provide important information in case of unidentified bodies. The methodological possibilities in these cases depend on the availability of tissues, whereby bones are preserved for a long time due to their mineralization under normal environmental conditions. Age-dependent changes in DNA methylation (DNAm) as well as the accumulation of pentosidine (Pen) and D-aspartic acid (D-Asp) could be useful molecular markers for age prediction. A combination of such molecular clocks into one age prediction model seems favorable to minimize inter- and intra-individual variation. We therefore developed (I) age prediction models based on the three molecular clocks, (II) examined the improvement of age prediction by combination, and (III) investigated if samples with signs of decomposition can also be examined using these three molecular clocks. Skull bone from deceased individuals was collected to obtain a training dataset (n = 86), and two independent test sets (without signs of decomposition: n = 44, with signs of decomposition: n = 48). DNAm of 6 CpG sites in ELOVL2, KLF14, PDE4C, RPA2, TRIM59 and ZYG11A was analyzed using massive parallel sequencing (MPS). The D-Asp and Pen contents were analyzed by high performance liquid chromatography (HPLC). Age prediction models based on ridge regression were developed resulting in mean absolute errors (MAEs)/root mean square errors (RMSE) of 5.5years /6.6 years (DNAm), 7.7 years /9.3 years (Pen) and 11.7 years /14.6 years (D-Asp) in the test set. Unsurprisingly, a general lower accuracy for the DNAm, D-Asp, and Pen models was observed in samples from decomposed bodies (MAE: 7.4–11.8 years, RMSE: 10.4–15.4 years). This reduced accuracy could be caused by multiple factors with different impact on each molecular clock. To acknowledge general changes due to decomposition, a pilot model for a possible age prediction based on the decomposed samples as training set improved the accuracy evaluated by leave-one-out-cross validation (MAE: 6.6–12 years, RMSE: 8.1–15.9 years). The combination of all three molecular age clocks did reveal comparable MAE and RMSE results to the pure analysis of the DNA methylation for the test set without signs of decomposition. However, an improvement by the combination of all three clocks was possible for the decomposed samples, reducing especially the deviation in case of outliers in samples with very high decomposition and low DNA content. The results demonstrate the general potential in a combined analysis of different molecular clocks in specific cases.