Miracle-dz/UniFAR-FTUs huggingface dataset:
Adhesion enhancement methods for a roll-to-sheet fabrication process of DE stack-transducers and their influences on the electric properties

Transducers made of dielectric elastomers (DE) offer versatile opportunities for many different applications. To gain large strains and forces a multilayer topology is commonly used. DE stack-transducers represent one multilayer topology and can be operated as a sensor, a generator or an actuator simultaneously. They are made of many layers of DE films, like silicone (PDMS) and polyurethane (PUR), stacked on top of each other. The single layers are several micrometers thin and coated with a compliant electrode on both sides. Depending on the application a DE transducer has to withstand tensile forces, which may lead to a delamination of the layers and a ripping of the stack-transducer. This can be prevented by enhancing the adhesion among the layers. Within this contribution a surface plasma jet treatment with an atmospheric plasma beam as well as an adhesive utilized as electrode material was investigated to obtain an adhesion enhancement. The effects of these methods to enhance the adhesion are introduced briefly. Furthermore, various investigations were made to determine the benefits of the enhancement methods with respect to the electromechanical properties of the electrode. Therefore, certain tests regarding the surface resistance of the electrode and the dielectric breakdown strength (DBS) of the DE film were conducted. The tests indicate that the influences are strongly dependent on the composition of the electrode and the used DE material. Finally, improvements for a dry deposition roll-to-sheet manufacturing process for DE stack-transducers are derived from the obtained results.
Some statistical heresies

Shortcomings of modern views of statistical inference have had negative effects on the image of statistics, whether through students, clients or the press. Here, I question the underlying foundations of modern inference, including the existence of 'true' models, the need for probability, whether frequentist or Bayesian, to make inference statements, the assumed continuity of observed data, the ideal of large samples and the need for procedures to be insensitive to assumptions. In the context of exploratory inferences, I consider how much can be done by using minimal assumptions related to interpreting a likelihood function. Questions addressed include the appropriate probabil-istic basis of models, ways of calibrating likelihoods involving differing numbers of parameters, the roles of model selection and model checking, the precision of parameter estimates, the use of prior empirical information and the relationship of these to sample size. I compare this direct likelihood approach with classical Bayesian and frequentist methods in analysing the evolution of cases of acquired immune deficiency syndrome in the presence of reporting delays.
Intrinsic evolution of the decoupling and coupling of the plasma density and temperature in a cylindrical laboratory plasma device

An intrinsic evolution in the decoupling–coupling–decoupling (DCD) of the electron density and temperature responding to the magnetic field change is observed in a cylindrical laboratory plasma device. Experimental results show that the density and the temperature decouple in the low magnetic field, couple with higher magnetic field, and decouple again with a continuous magnetic field increase. An element physical picture of the DCD regime is unraveled based on the analyses of gradient lengths, the turbulence propagation directions, the turbulence spatial scales, and the relationship between the normalized collision rates and the poloidal mode numbers.
FINDING THE HIDDEN DIMENSION OF GLOBAL INTERNET USAGE THROUGH FRACTAL ANALYSIS

Statistics revealed that the number of internet users in the world is increasing due to technological advancements. Technological advancement, on the other hand, is a function of the national economy. Highly developed nations, therefore, are expected to have more internet users than less developed economies. Fractal analysis is a contemporary method of applying nontraditional mathematics to patterns that defy understanding with traditional Euclidean concepts. This study employed a descriptive method of research and made use of secondary data from 198 countries (internet users) of 2014. Fractal analysis was used to determine the fractal characteristic of the given data. The histogram of the logarithm of the Internet Users across the world appears to be normally distributed. The phenomenon of observed internet users has already departed from the natural state. Analysis of the fractal observations revealed a tendency to diffuse towards uniformity in the use of internet all over the world so that cyber-communication will become the norm or standard through which countries will eventually exchange information.
FOMENTO DE LA AUTORREGULACIÓN DEL APRENDIZAJE A TRAVÉS DE UN PROGRAMA INCORPORADO AL CURRICULUM UNIVERSITARIO

Las reformas curriculares por el cual atraviesan los programas educativos de las Instituciones de Educación Superior han establecido como uno de sus indicadores en el perfil de egreso de los estudiantes la capacidad para analizar, planificar y evaluar las acciones que permitan atender las demandas disciplinarias bajo el marco de formación de desarrollo competencias académicas y laborales en una perspectiva de un aprendizaje a lo largo de la vida. La presente investigación tuvo como objetivo evaluar la eficacia de un programa instruccional que incorpore el uso de la rúbrica formativa y retroalimentación cuantitativa en los factores que conforman la dimensión autorregulación del aprendizaje en estudiantes universitarios al elaborar un documento escrito en la modalidad de plataformas digitales. Se realizó un estudio prospectivo, comparativo de causa-efecto de una cohorte con un diseño cuasi experimental con grupos intactos. Participaron 50 estudiantes del primer semestre, en las fases del pre y post evaluación se utilizó el instrumento Cuestionario de Motivación y Estrategias de Aprendizaje [CMEA] que evalúa autorregulación del aprendizaje. Las sesiones de intervención constaron de cuatro fases. Al comparar las puntuaciones del cuestionario entre ambos grupos se observan diferencias significativas en las dimensiones de la autorregulación y el desempeño de la tarea, siendo el grupo que trabajo con rúbrica el que tiene mejores calificaciones. Se presentan unas reflexiones sobre el uso de la rúbrica y la retroalimentación cuantitativa como acciones en la práctica docente.
Multi-touching imaging via sparse sensing

For the fast touching imaging of the capacitive touch screens (CTS) with a very large size, the conventional methods can only be achieved at the expense of the analog hardware complexity and power consumption. Firstly, the sparse feature of variation within the capacitance of CTS being touched was analyzed. Secondly, the principal for measuring the capacitance of CTS was introduced, and then the scheme of sparse touching imaging was given. Moreover, the hardware implementation for sparse sensing was presented. An algorithm of touching sensing for CTS and its implementation were proposed. The test result indicated the validity of sparse touching imaging for CTS. The proposed method can achieve touching imaging efficiently with lower hardware complexity and lower power consumption.
Swings in Crude Oil Valuations: Analyzing Their Bearing on China’s Stock Market Returns amid the COVID-19 Pandemic Upheaval

The advent of the COVID-19 pandemic has markedly affected energy valuations and financial markets. As such, this article aims to scrutinize the dynamic interplay between stock market returns and crude oil prices, with a particular focus on China, factoring in the second-moment effect of volatility spillover. Employing an EGARCH process to model the leverage impact on returns’ volatility, the analysis utilizes daily data spanning from January 30, 2020, to August 30, 2022, and incorporates causality-in-mean and variance assessments. Empirical findings indicate that the QDII-LOF benchmark, representing oil prices, exerts a substantial influence on stock market returns. Nevertheless, the complete sample reveals no discernible spillover effects attributable to oil price fluctuations. These insights imply that the Chinese government’s actions should carefully weigh the ramifications of spillovers. Concurrently, investors are advised to attentively monitor the crude oil market when making portfolio allocation decisions.
In situ determination of alkali metal density using phase-frequency analysis on atomic magnetometers

The alkali number density inside the sealed vapor cell restricts the fundamental sensitivity of the atomic magnetometer and may decrease in the long term, thus motivating the investigation of an in situ density determination method on atomic magnetometers. This paper presents a method to measure the alkali number density, which is proportional to the spin-exchange relaxation rate, through phase-frequency analysis. The magnetic resonance response of the atomic magnetometer was actively strengthened at low polarization by increasing the oscillating field amplitude. To downplay the side effect of the transverse field broadening, phase-frequency analysis was applied to extract the transverse relaxation time limited by spin-exchange collisions. The experimental results coincided well with the saturated vapor pressure curve ranging from 413 K to 463 K. Calculated densities were approximately 0.779–0.992 times those of predictions. The density measurement accuracy was improved compared to traditional methods.
The distribution of prices in Financial Markets: a chaotic approach

We develop a model to study the distribution of prices in Financial markets. Our approach, introducing a term containing the rapidity of variation of price, in the discrete time reduces itself to a logistic map which exhibits a chaotic behavior. Considering a memory term we are able to reproduce the distribution of real prices in German Dax, French Cac40 and English Ftse with a good agreement. Our model outlines that, compared to the distribution of prices, economic time series can be described by means of chaotic series with a memory function.
Zero delay anti-bunching as an entanglement signature for plasmonically coupled driven qubits

Dissipative entanglement generation protocols embrace environmental interactions in order to generate long-lived entangled states. In this letter, we report on anti-bunching in the second order correlation function for a pair of actively driven quantum emitters coupled to a shared dissipative plasmonic reservoir. We find that anti-bunching is a universal signature for entangled states generated by dissipative means and examine its use as an entanglement diagnostic. We discuss the experimental validation of anti-bunching on realistic timescales, determined by an effective two-qubit Rabi frequency, and analyze the robustness of entanglement generation with respect to perturbations in local detunings, couplings, and driving fields.
Adoption of E-Wallets in Indonesia: Integrating Mindfulness into the Technology Acceptance Model

This study investigates the main determinants of e-wallet use intention and proposes an e-wallet adoption model that includes mindfulness as a significant factor. The respondents in this study are e-wallet users between the ages of 17 and 40 who live in Bengkulu City. To collect data samples from respondents, the convenience sampling technique was used. This study's online survey questionnaires were distributed via social media platforms such as WhatsApp and Instagram. After using the listwise deletion method on SEM-AMOS with Mahalanobis Distance, 257 usable questionnaires were available for analysis. For data analysis, Confirmatory Factor Analysis (CFA), assessment of normality, and regression weights were used in this study. According to the findings, (1) mindfulness has a positive and significant effect on perceived usefulness, (2) mindfulness has a positive and significant effect on perceived ease of use, (3) perceived usefulness has a positive and significant effect on the intention to use, (4) perceived ease of use has no significant effect on the intention to use, and (5) intention to use has a positive and significant effect on actual use. This study adds to the body of knowledge by extending the concept of TAM through the incorporation of mindfulness variables into a structural model. It is suggested that providers expand their merchant partners in order to provide more benefits to customers, and that they improve more features and benefits for people who use their apps. Furthermore, this study discovered some limitations, which include a) limited geographical areas for data collection, giving opportunity for future research to expand more and will be much better if can compare respondent characteristics between cultures; b) four dimensions of mindfulness must be validated again when applied to other contexts; and c) future research can look at post-purchase phenomenon to catch e-wallet adoption even better.
Quantum Monte Carlo simulations of the Fermi-polaron problem and bosons with Gaussian interactions

This thesis deals with the application of current Quantum Monte Carlo algorithms to many-body systems of fermionic and bosonic species. The first part applies the diagrammatic Monte Carlo method to the Fermi polaron problem, a system of an impurity interacting resonantly with a homogeneous Fermi bath. It is numerically shown that the three particle-hole diagrams do not contribute significantly to the final answer in a quasi-two-dimensional setup, thus demonstrating a nearly perfect destructive interference of contributions in subspaces with higher-order particle-hole lines. Consequently, for strong-enough confinement in the third direction, the transition between the polaron and the molecule ground state is found to be in good agreement with the pure two-dimensional case and agrees very well with the one found by the wave-function approach in the two-particle-hole subspace. In three-dimensional Fermi-polaron systems with mass imbalance of impurity and bath atoms, polaron energy and quasiparticle residue can be accurately determined over a broad range of impurity masses. Furthermore, the spectral function of an imbalanced polaron demonstrates the stability of the quasiparticle and also allows us to locate the repulsive polaron as an excited state. The quantitative exactness of two-particle-hole wave functions is investigated, resulting in a relative lowering of polaronic energies in the mass-imbalance phase diagram. Tan’s contact coefficient for the mass-balanced polaron system is found to be in good agreement with variational methods. Mass-imbalanced systems can be studied experimentally by ultracold atom mixtures such as 6Li – 40K. In the second part of the thesis, the ground state of a two-dimensional system of Bose particles of spin zero, interacting via a repulsive Gaussian-Core potential, is investigated by means of path integral Monte Carlo simulations. The quantum phase diagram is qualitatively identical to that of two-dimensional Yukawa bosons. While the system is a fluid at all densities for weak coupling, in the strong coupling regime it transitions upon compression from a low density superfluid to a crystal, and then into a reentrant superfluid phase. No evidence of a (supersolid) cluster crystal phase is seen.
Spin transfer torque switching in exchange-coupled amorphous GdFeCo/TbFe bilayers for thermally assisted MRAM application

Exchange-coupled amorphous GdFeCo/TbFe memory layers in giant magneto-resistance (GMR) devices for spin transfer torque (STT) switching have been studied, and temperature dependence of the critical current density of the GMR devices was measured to discuss the effect of exchange-coupled bilayers as a memory layer of the thermally assisted magnetic random access memory (MRAM). The GMR devices having amorphous GdFeCo and TbFe memory bilayers with various thicknesses were prepared by magnetron sputtering and subsequent micro-fabrication processes. A pulsed current was applied to the GMR devices in order to investigate the spin transfer torque (STT) switching. The maximum magneto-resistance (MR) ratio was around 0.15%, and the coercivity of the memory bilayer increased with the TbFe thickness and decreased with elevating temperature. The critical current densities Jc to switch the memory bilayer with structure of Gd21.4 (Fe90Co10)78.6(9 nm)/Tb16Fe84 (1 nm) as low as 2.2 × 107 A cm−2 was obtained. The Jc reduced with increasing the temperature and was found to scale with the effective anisotropy Keff of GdFeCo/TbFe bilayer, which is believed to be suitable for the application of thermally assisted STT-MRAM.
The AfD within the AfD: Radical Right Intra-Party Competition and Ideational Change

The normalization of radical right (RR) politics fosters opportunities for RR parties, but can also facilitate intra-party conflicts over the ‘true’ version of the shared party ideology. Previous research has highlighted two factors that influence ideational change within RR parties: contextual conditions and the formal power of intra-party factions. Yet, surprisingly, the Alternative for Germany (AfD) progressively radicalized to the right and witnessed the increased influence of its extremist grouping Der Flügel, despite contextual normalization pressures and the grouping's lower formal power. Analysing three crucial conflicts within the AfD between 2013 and 2021, we show how intra-party competition additionally plays into nativist party radicalization. Flügel balanced contextual and ‘hard’ power disadvantages by fostering its ‘soft’ power as ‘the true party within the party’. Simultaneously, this power was cemented by more established AfD actors who used Flügel's ideas against other competitors for office. Our conclusions have important implications for comparative research on competition within and between RR parties.
Sur les fluides relativistes à spin

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New aspects of nonautonomous discrete systems stability

We prove that a discrete evolution family ${\bf U}:=\{U(n,m):\; n\geq m\in \mathbb{Z}_+\}$ of bounded linear operators acting on a complex Banach space $X$ is uniformly esponentially stable if and only if for each forcing term $(f(n))_{n\in \mathbb{Z}_+}$ belonging to $AP_0(\mathbb{Z}_+, X)$, the solution of the discrete Cauchy Problem $$ \left\{ \begin{array}{lc} x(n+1)=A(n)x(n)+f(n), n\in \mathbb{Z}_+ \\ x(0)=0 \end{array} \right. $$ belongs to $AP_0(\mathbb{Z}_+, X)$, where the operators-valued sequence $(A(n))_{n\in \mathbb{Z}_+}$ generates the evolution family ${\bf U}$. The approach we use is based on the theory of discrete evolution semigroups associated to this family.
Relative $\beta$ -Axis Residual Voltage Signal Based Fault Detection for Inverter Switch Open-Circuit Failure

With the ever-increasing application of permanent magnet synchronous machine (PMSM) drives, the requirements for safety and reliability are raised. This article presents a detailed analysis of the open-circuit fault behavior of the inverter power device by comparing the reference voltage and the actual output voltage under both healthy and faulty conditions. The reference voltage is predicted by real-time switching state of inverter power device while the actual output voltage is estimated by a healthy machine model. It is found that the relative β-axis residual voltage of the fault phase remains unchanged during open-circuit fault, however, it is not the case for the healthy phases. This unique fault behavior is exploited for open-circuit fault detection in the PMSM drives. The voltage residuals are used to construct fault indicator and their polarities are employed for fault location identification. Average detection time is 5% electric cycle which is much faster than the existing method. Finally, the effectiveness and robustness of the proposed technique are verified under various load and speed conditions via a triple three-phase PMSM drive.
Microstrip Array Antenna with Improved Radiation Characteristic for Different 5G Applications

A Ka-band inset-fed microstrip patches linear antenna array is presented for the fifth generation (5G) applications in different countries. The bandwidth is enhanced by stacking parasitic patches on top of each inset-fed patch. The array employs 16 elements in an H-plane new configuration. The radiating patches and their feed lines are arranged in an alternating out-of-phase 180-degree rotating sequence to decrease the mutual coupling and improve the radiation pattern symmetry. A (24.4%) measured bandwidth (24.35 to 31.13 GHz)is achieved with -15 dB reflection coefficients and 20 dB mutual coupling between the elements. With uniform amplitude distribution, a maximum broadside gain of 19.88 dBi is achieved. Scanning the main beam to 49.5° from the broadside achieved 18.7 dBi gain with -12.1 dB sidelobe level (SLL). These characteristics are in good agreement with the simulations, rendering the antenna to be a good candidate for 5G applications.
Ant preference for different types of bait at sugarcane plantations in East Java, Indonesia

Abstract. Rahardjo BT, Muhammad FN, Setiawan Y, Febryadi A, Ihsan M, Wibowo D, Fernando I. 2023. Ant preference for different types of bait at sugarcane plantations in East Java, Indonesia. Biodiversitas 24:2099-2106. The occurrence of ants is important in agroecosystems since they may provide both ecosystem services or disservices depending on the species composition. Therefore, it is necessary to investigate the kind of ant species that are present in agroecosystems. This study aimed to assess the effectiveness of three types of bait to measure ant abundance and diversity in sugarcane plantations. This research was conducted from July to September 2022 in four locations in East Java, Indonesia, i.e., Karangploso, Kalipare, Gandusari, and Pasirian. At each location, one plot was determined and divided into nine subplots. Ant sampling was conducted using modified pitfall traps that may contain one type of bait or without bait as control treatment. There were three types of assayed bait, i.e., tuna, eggs, and sugar. Nine traps for each treatment were installed in each location. This study obtained 6,650 individual ants from 20 morphospecies, 16 genera, and 4 subfamilies. At each location, species richness and abundance were not significantly different among bait types. However, those variables differed between the bait groups and the control. Tuna and egg baits were preferred by ants, as indicated by the higher number of trapped individuals than in sugar bait and the control traps. The species composition of the different baits was different at all locations except Kalipare. Each ant species had a different preference for the type of bait. Formicine ants preferred sugar bait, while ponerine ants preferred tuna and egg baits. Hence, it can be concluded that the bait type selection needs to be considered for ant monitoring. Therefore, using various types of baits is recommended to monitor the assemblage of ants in an ecosystem.