Miracle-dz/UniFAR-FTUs huggingface dataset:
State-of-charge estimation for Li-ion batteries with uncertain parameters and uncorrelated/correlated noises: a recursive approach

In this paper, the recursive state-of-charge (SOC) estimation problem is investigated for the Li-ion batteries. The uncertain parameters, which are used to account for the effects of the changing temperatures, the battery power and the drift current of current sensors, are considered in the modelling process of the Li-ion batteries. Moreover, the uncorrelated/correlated noises are also considered based on the engineering practice. The aim of the paper is to design a SOC estimation scheme such that an upper bound on the estimation error covariance is guaranteed, and such an upper bound is then minimised by appropriately designing the estimator gain. Finally, simulation experiments are carried out to demonstrate the effectiveness of our proposed SOC estimation scheme.
Extended-Distance Wireless Power Transfer System With Constant Output Power and Transfer Efficiency Based on Parity-Time-Symmetric Principle

Maintaining constant power transfer while keeping near-unity transfer efficiency at varying transfer distances is a major challenge for existing wireless power transfer (WPT) system with multiple repeaters. In order to overcome the problem, this article proposes a novel WPT mechanism with multiple repeaters based on the concept of parity-time symmetry. First, the coupled-mode model of this WPT relay system is established. Then, the steady-state transfer characteristics of the proposed WPT system with an odd and even number of repeaters are analyzed. The theoretical analysis shows that whether an odd or even number of repeaters are inserted between the transmitting and receiving coils, the proposed system automatically achieves constant output power and transfer efficiency against the variation of the transfer distance without any tuning or feedback within a certain distance. The prototype with one repeater and two repeaters is implemented to verify the validity of the theoretical analysis. Experimental results show that the prototype with one repeater can transfer power with an invariant transfer efficiency of 91% and a constant output power of 15 W within a transfer distance of 420 mm. Similarly, the prototype with two repeaters transfers constant power of 15 W over a transfer distance ranging from 420 to 500 mm, and the transfer efficiency is constant near 89%.
Promotion Strategy On Decisions On Using J&T Express Services, Pekanbaru

In this study discusses the promotion of the Decision on the Use of J & T Express Services at PT Garuda Ekspress Nusantara in the city of Pekanbaru. The method used is using simple linear regression with the result Y = 5.878 + 0.925 X. From this equation it can be explained that kαonstanta (Y = 5.878 + 0.925 X, from the equation can be explained that, the constant (a) is 5.878 stating that there is no the promotion of the use decision of 5.878. The regression coefficient of 0.925 states that each addition of one promotion unit it is predicted that the decision to use will increase by 0.925. This is because there is a relationship between promotion and decision to use services.The hypothesis testing is done by comparing the t statistic value with t table at alpha 5% and degree of freeom (df) = 96 - 2 = 94. So that the ttable value is 1,986. It is known that t count is 12,892 while t table is 1,986 (tcount 12,892 > ttable 1,986). t table, then t count > t table so the result is H0 is rejected, meaning the promotion has a role significant influence on Decision Use of J & T Express services at PT Garuda Ekspress Nusantara Pekanbaru.
The Impact of Isolation Due to COVID-19 on Physical Activity Levels in Adult Students

The lockdown with a prohibition of free mobility introduced in many countries has affected restrictions in physical activity (PA). The purpose of the study was to compare PA during restrictions and the “unfreezing” stage. The study group consisted of 89 healthy adult students. To assess the level of PA, a long version of the International Physical Activity Questionnaire (IPAQ) was used. The first evaluation was carried out in the period from 16 to 20 April 2020 at the time of the lockdown and the second in the period from 11 to 14 May 2020 during the so-called “unfreezing”. The average total PA rate during the first measurement was 8640 metabolic equivalent (MET)-min/week and in the second, 10,560 MET-min/week. The analysis of total energy expenditure showed a statistically significant difference (p < 0.029). The establishment of “unfreezing” laws for sport and recreation and the reduction of restrictions have significantly contributed to an increase in the overall level of PA. Based on our outcomes, we recommend students follow the scientific guidelines for undertaking PA (i.e., WHO) during the pandemic in order to maintain an appropriate pro-healthy dose of exercise.
Complementary Analysis for DGA Based on Duval Methods and Furan Compounds Using Artificial Neural Networks

Power transformers play an important role in electrical systems; being considered the core of electric power transmissions and distribution networks, the owners and users of these assets are increasingly concerned with adopting reliable, automated, and non-invasive techniques to monitor and diagnose their operating conditions. Thus, monitoring the conditions of power transformers has evolved, in the sense that a complete characterization of the conditions of oil–paper insulation can be achieved through dissolved gas analysis (DGA) and furan compounds analysis, since these analyses provide a lot of information about the phenomena that occur in power transformers. The Duval triangles and pentagons methods can be used with a high percentage of correct predictions compared to the known classical methods (key gases, International Electrotechnical Commission (IEC), Rogers, Doernenburg ratios), because, in addition to the six types of basic faults, they also identify four sub-types of thermal faults that provide important additional information for the appropriate corrective actions to be applied to the transformers. A new approach is presented based on the complementarity between the analysis of the gases dissolved in the transformer oil and the analysis of furan compounds, for the identification of the different faults, especially when there are multiple faults, by extending the diagnosis of the operating conditions of the power transformers, in terms of paper degradation. The implemented software system based on artificial neural networks was tested and validated in practice, with good results.
Chain‐by‐Chain Monte Carlo Simulation: A Novel Hybrid Method for Modeling Polymerization. Part I. Linear Controlled Radical Polymerization Systems

Kinetic Monte Carlo (kMC) simulation is available for simulating microstructure of polymer chains with as much detail as one seeks at the expense of convergence tests and computational costs. A new hybrid deterministic–probabilistic method is developed as an alternative to kMC that builds chains one-by-one or chain-by-chain and it is named “Chain-by-Chain Monte Carlo” method (CBC-MC). The CBC-MC algorithm is tested on the synthesis of styrene/methyl methacrylate linear gradient copolymers via nitroxide-mediated polymerization and methyl methacrylate/methyl acrylate linear hyperbolic gradient copolymers via atom transfer radical polymerization. Results are compared with kMC and method of moments and confirm that if applicable, full information regarding the microstructure of chains can be obtained using CBC-MC method with reduced simulation times and smaller sample sizes.
Exploring differences in psychological well-being and self-regulated learning in university student success

Worldwide, there are increasing concerns about postsecondary students’ mental health and how student success is implicated. Previous research has established psychological well-being and self-regulated learning are important components of student success, however, there is a paucity of research examining the interplay between these factors during a semester-long course. In this study, 118 students in a learning-to-learn elective university course completed nine weekly online planning and reflection tools. Students planned for a study session, completed an academic engagement and a psychological well-being measure, then reflected on a challenge faced and described the strategy chosen to overcome that challenge. Findings revealed (a) students who reported always attaining their goals also reported higher overall psychological well-being, and (b) within-person patterns of psychological well-being and academic engagement over time may affect regulatory responses to challenge or vice versa. Implications for theory, research, and practice are discussed.
Information Technology for Business Sustainability: A Literature Review with Automated Content Analysis

An extremely dynamic and fast-moving environment is pushing enterprises to continuous innovation and change. Managing sustainability in a digitalized environment seems to be of central importance for policy makers, as information technologies (IT), in combination with sustainability objectives, offer a wide range of opportunities for positive change. Through a systematic literature review and the application of automated content analysis, this study aims to provide insights into the latest research in the interdisciplinary field of sustainable business models and information systems. The results of the analysis, combined with a researcher’s perspective, suggest that IT, which can be used to achieve sustainability objectives, are already in place and have an infinite number of potential implications in the future. The results suggest that positive economic, social, and environmental changes can be achieved by using IT as long as they are used to identify unsustainable actions and enable positive change. The analysis of research trends revealed a discrepancy between the research in the European Union and the rest of the world and pointed to several avenues for future research.
Electrographic Features of Spontaneous Recurrent Seizures in a Mouse Model of Extended Hippocampal Kindling

Abstract Epilepsy is a chronic neurological disorder characterized by spontaneous recurrent seizures (SRS) and comorbidities. Kindling through repetitive brief stimulation of a limbic structure is a commonly used model of temporal lobe epilepsy. Particularly, extended kindling over a period up to a few months can induce SRS, which may simulate slowly evolving epileptogenesis of temporal lobe epilepsy. Currently, electroencephalographic (EEG) features of SRS in rodent models of extended kindling remain to be detailed. We explored this using a mouse model of extended hippocampal kindling. Intracranial EEG recordings were made from the kindled hippocampus and unstimulated hippocampal, neocortical, piriform, entorhinal, or thalamic area in individual mice. Spontaneous EEG discharges with concurrent low-voltage fast onsets were observed from the two corresponding areas in nearly all SRS detected, irrespective of associated motor seizures. Examined in brain slices, epileptiform discharges were induced by alkaline artificial cerebrospinal fluid in the hippocampal CA3, piriform and entorhinal cortical areas of extended kindled mice but not control mice. Together, these in vivo and in vitro observations suggest that the epileptic activity involving a macroscopic network may generate concurrent discharges in forebrain areas and initiate SRS in hippocampally kindled mice.
A Luminescent Zinc(II) Metal-Organic Framework for Selective Detection of Nitroaromatics, Fe3+ and CrO4 2- : A Versatile Threefold Fluorescent Sensor.

A new ZnII metal-organic framework, [Zn6 (L)3 (DMA)4 ]⋅5 DMA (H4 L=[1,1':3',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid, DMA=dimethylacetamide), has been synthesized and characterized. The structure contains a three-dimensional 3,4,4,6-connected net with (4.62 )2 (66 )(66 )(42 .610 .83 ) topology and displays selective detection of nitrobenzene, CrO4 2- and Fe3+ ions. The present work thus indicates that this metal-organic framework could be a prospective candidate for developing novel luminescence sensors for the selective sensing of nitrobenzene, which can be used as a precursor for explosives. Furthermore, the photoluminescent properties of this material in different solvents and with various analytes were investigated and corroborated by theoretical calculations. The results were in good agreement with the experimental solvent-dependent luminescence behavior.
An Adaptive Double Area Page Replacement Algorithm for NAND Flash

In order to improve the hit rate of memory pages and prolong the service life of flash memo ry, an adaptive double area page replacement algorithm is proposed. The buffer is divided into page area and page cluster area. The initial size o f each area is set. The size of the area is dynamically changed according to the number of page hits in the two areas. The replacement unit of the page area is a single page. The CCF-LRU algorithm is used in page area replacement policy. When the page in the page area needs to be replaced, the rep laced page is put into the page cluster area. The replacement unit of page cluster area is the whole page cluster. When the page area cluster needs to be replaced, the dirty memory pages in the page cluster are divided into small memo ry pages with the same size as the flash memory pages, and only the dirty small memory pages are written back. According to the analysis of experimental results, compared with CF-LRU, CCF-LRU and FAB, the hit rate is increased by 9%, 8% and 11% respectively
Environmental Innovation Model with Product and Outcomes Dimension of Green Kampung in Surabaya City

The background of this research is the phenomenon of Surabaya as one of the Global Green Cities, besides Maanheim from Germany and Zhejiang Province from China, in the "Sustainable City and Human Settlements Award" by the United Nations 2017. This investigation is presented as a continuation of previous research on sustainable green cities through measuring the success rate of environmental innovation. Therefore, the aim of this study is to examine the extent to which environmental in-novation is explained by the dimensions of outcomes and green kampung products. The research method used is an explanative quantitative approach. Furthermore, data collection was carried out using a non-probability sampling with snowball techniques, obtaining 71 respondents. It was more than the planned minimum of 52 samples. Statistical analysis consisted of second-order confirmatory factors which were recorded as sub-structural equation modeling. The results showed that the model developed had a fairly good fit. Meanwhile, the green kampung product dimension with three indicators was declared valid to contribute 93.01%, while the outcomes dimension gave 92.89%. These two dimensions together in the overall complex model were able to measure the green kampung environmental innovation construction by 65.1%. The novelty in this research is the dimensions of the outcomes of the green kampung in the form of appreciation, the values of creativity and innovation of the residents as well as mutual awareness to care for the environment. This is a new determinant of environmental innovation performance, besides products for urban kampung.
Preoperative Evaluation of Tractional Retinal Detachment with B–Mode Ultrasonography in Diabetic Vitreous Hemorrhage

Objectives: This study was designed to evaluate the reliability of preoperative ultrasonography (USG) to detect tractional retinal detachment (TRD) in vitreous hemorrhage (VH) due to proliferative diabetic retinopathy. Methods: The medical records of patients with VH who underwent A- and B-scan ultrasonography prior to a vitrectomy between November 2016 and May 2017 were reviewed in this retrospective study. All of the patients were assessed using USG before surgery with 4-quadrant transverse and 1-quadrant longitudinal scans whether to determine if the VH was accompanied by TRD. The USG results were compared with the vitrectomy findings. Results: A total of 111 eyes of 106 patients with VH were evaluated. Twenty-three eyes were excluded from the study due to non-diabetic diagnoses, such as retinal vein-artery occlusion, trauma, intraocular mass, choroidal neovascular membrane, or macroaneurysm. The remaining 88 eyes with diabetic VH were included in the study. Preoperatively, VH alone was observed in 65 eyes (73.8%) and VH accompanied with TRD was determined in 23 eyes (26.2%) using USG. TRD was not found during the operation in 2 eyes (2.2%) diagnosed as VH with TRD by USG (false positive), and in 8 eyes (9.1%), TRD was detected during surgery though VH alone had been recorded based on the USG results (false negative). Conclusion: USG is a reliable diagnostic tool that will provides accurate preoperative information about the presence of TRD in diabetic VH; however, in some cases TRD may go undetected, especially in eyes with peripherally localized or small TRD.
Molecular Complexes of Amino Acid (α-Alanine) and Their Manifestation in the Raman Spectra, Ab initio Calculations

The purpose of this work is to determine the role of hydrogen bonds in the crystallization of alanine, which includes carbooxyl COOH and amino NH2 groups, and the manifestation of these intermolecular interactions in the Raman spectra. FT-Raman spectra were analyzed and ab initio calculations by the RHF and B3LYP methods were performed in order to consider in more detail the possibility of the formation of aggregated intermolecular complexes in the crystalline state of α-alanine. The intra-molecular and inter-molecular interactions, the dynamics of molecular groups and structural changes of α-alanine have been studied by the method of Raman light scattering and ab initio calculations. Ab initio calculations have shown that the change in the Raman spectra is explained by the formation of several types of hydrogen bonds. These hydrogen bonds play a special role in the formation of the crystal structure of α-alanine. In Raman spectra, the presence of a hydrogen bond between molecules is manifested in the form of asymmetry and splitting of vibrational bands. An analysis of the Raman spectra of alanine with water shows that with an increase in the strength of the hydrogen bond leads to increase in the bond energy in the OH group. The hydrogen atom in the N-H group of the alanine molecule is actively involved in the formation of a hydrogen bond. It was shown by ab initio calculations that dimeric, trimeric and other chain molecular complexes exist in alanine. The complexes formed due to the hydrogen NH2 bond are weaker than those formed due to the OH bond. Upon the formation of a complex of alanine with water, the O-H vibration band shifts to the low-frequency side by 320 cm-1 and 415 cm-1, respectively. It was shown that an intramolecular hydrogen bond is formed between the NH and CO groups. It was found that in the Raman spectra of O-H and N-H, the alanine bands in the region of 2900-3050 cm-1 are complex and consist of several bands. The structure and connectivity of the bands is explained by the fact that the spectrum of the O-H bond consists of a symmetric valence band of vibrations and overtones of bending vibrations.
Modelling shear wave propagation in soft tissue surrogates using a finite element‐ and finite difference method

Shear Wave Elasticity Imaging (SWEI) has become a popular medical imaging technique [1] in which soft tissue is excited by the acoustic radiation forces of a focused ultrasonic beam. Tissue stiffness can then be derived from measurements of shear wave propagation speeds [2]. The main objective of this work is a comparison of a finite element (FEM) and a finite difference method (FDM) in terms of their computational efficiency when modeling shear wave propagation in tissue phantoms. Moreover, the propagation of shear waves is examined in experiments with ballistic gelatin to assess the simulation results. In comparison to the FEM the investigated FDM proves to be significantly more performant for this computing task.
MINIATURIZED CIRCULARLY-POLARIZED PATCH ANTENNA USING AN ARTIFICIAL METAMATERIAL SUBSTRATE

An artificially two-dimensional metamaterial (ATDM) substrate is proposed as an artificial metamaterial high-constitutive parameter substrate for miniaturizing of a circularly-polarized microstrip antenna. In a circularly-polarized antenna, the electric and magnetic field directions are changing, which requires a two-dimensional metamaterial unit cell. The presented ATDM substrate raises the permeability and permittivity of the underneath substrate for a circularly-polarized patch antenna, and it is constructed of periodically arranged split-ring resonator (SRR) circuits implemented in a low permittivity dielectric underneath substrate. The ATDM attains equal permittivity and permeability material (εr ∼= μr), which neutralizes the destructive effect of the increased permittivity on the bandwidth. In addition, the ATDM structure is implemented in printed circuit board technology. The area of the ATDM antenna at 2.45 GHz is approximately 75% smaller than a usual microstrip antenna. The proposed antenna bandwidth is enhanced compared to the antennas with high-permittivity substrates. The proposed ATDM substrate antenna is fabricated and measured, and comparisons show good agreements between simulated and measured results.
Ätzen von Kunststoffen : eine Präparationstechnik für mikroskopische Untersuchungen

Microscopic investigations of polymers are not only employed in research but also in quality-control and failure analysis. The amount of information depends strongly on the preparation procedure (microtomy surface or thin section polishing) and on the selection of microscopic contrast. The paper demonstrates the potential and the advantages of new etching techniques. Investigations on POM, PE, PP and thermoplastic compounds are presented.
Crossing transcultural liminalities with critical virtual exchange: a study of shifting border discourses

The physical environments where we work, play, live are not neutral. They are not blank backdrops, silent witnesses to human activity. Rather, place – the physical surroundings – and space – practiced place – are shaped by unique social, cultural, historical, and political variables, the products of histories and the creators of tomorrows (Blommaert, 2013). Importantly, place and space are infused with power: while geopolitical boundaries and state borders may delineate geographies into countries and cultures, they also impose linguistic, cultural, and political divides on peoples and communities and create power asymmetries that perpetuate the ideologies of the colonizer and the colonized (Marston et al., 2005). An acknowledgment of the significant role of place and space in language education means seeing both as integral components and reflections of larger socio-political human realities (Higgins, 2017), but also recognizing the potential perils of monoglossic, monolingual approaches to language studies and educational practices that flatten local plurilingual and pluricultural realities in favor of generalizable monolithic geopolitical superficiality. This latter contradiction explains why attending to place and space holds great pedagogical potential for second/foreign language teaching, opening a wide span of multiand interdisciplinary opportunities for critical cultural education (Gruenewald, 2003) and situating language study in cultural, historical, geographic, and cross-cultural frames within the context of humanistic learning (Modern Language Association (MLA) Report, 2007, p. 4). Among current methodologies and practices in intercultural education, virtual exchange (VE) is a potential pedagogical platform for such placeconscious education: A staple in language learning research and practice for the last 20 years, virtual exchange connects students from geographically