Miracle-dz/UniFAR-FTUs huggingface dataset:
Notes on Recent Achievements in Proving Stability using KeYmaeraX

KeYmaeraX is a Hoare-style theorem prover for hybrid systems. A hybrid system can be seen as an aggregation of both discrete and continuous variables, whose values can change abruptly or continuously, respectively. KeYmaeraX supports only variables having the primitive type bool or real. Due to the mixture of discrete and continuous system elements, one promising application area for KeYmaeraX are closed-loop control systems. A closed-loop control system consists of a plant and a controller. While the plant is basically an aggregation of continuous variables whose values change over time accordingly to physical laws, the controller can be seen as an algorithm formulated in a classical programming language. In this paper, we review some recent extensions of the proof calculus applied by KeYmaeraX that make formal proofs on the stability of dynamic systems more feasible. Based on an example, we first introduce to the topic and prove asymptotic stability of a given system in a hand-written mathematical style. This approach is then compared with a formal encoding of the problem and a formal proof established in KeYmaeraX. We also discuss open problems such as the formalization of asymptotic stability.
Sibling rivalry among the ZBTB transcription factor family: homo vs. heterodimers

The BTB domain is an oligomerization domain found in over 200 proteins encoded in the human genome. In the family of BTB domain and Zinc Finger-containing (ZBTB) transcription factors, 49 members share the same protein architecture. The N-terminal BTB domain is structurally conserved among the family members and serves as the dimerization site while the C-terminal zinc finger motifs mediate DNA binding. The available BTB domain structures from this family reveal a natural inclination for homodimerization. In this study we investigated the potential for heterodimer formation in the cellular environment. We selected five BTB homodimers and four heterodimer structures. We performed in vitro binding assays with fluorescent protein-BTB domain fusions to assess dimer formation. We tested the binding of several BTB pairs, and we were able to confirm the heterodimeric physical interaction between the BTB domains of PATZ1 and PATZ2, previously reported only in an interactome mapping experiment. We also found this pair to be co-expressed in several immune system cell types. Finally, we used the available structures of BTB domain dimers and newly constructed models in extended molecular dynamics simulations (500 ns) to understand the energetic determinants of homo and heterodimer formation. We conclude that heterodimer formation, although frequently described as less preferred than homodimers, is a possible mechanism to increase the combinatorial specificity of this transcription factor family.
An Artificial-transmission-line-based Miniaturized Doubly Balanced Ring Mixer

In this paper, a miniaturized doubly balanced ring mixer is presented and investigated. The proposed miniaturized mixer is composed of two novel Marchand baluns, four diodes in a ring configuration and a pair of LPF filters. By utilizing the newly proposed coupled artificial transmission lines, the new Marchand balun features a compact size and comparable operating bandwidth as its conventional counterpart. The doubly balanced ring mixer is fabricated on a six-layered printed circuit board and occupies an area of 16.7 by 16 mm. The conversion loss of the ring mixer is less than 11 dB as the RF frequency varies from 1.1 to 3GHz. The isolations between all three ports remain pretty good for frequencies up to 4.5GHz, and the 1-dB compression power is 5 dBm.
O SUCESSO DE STARTUPS DE COMÉRCIO ELETRÔNICO: UM ESTUDO EMPÍRICO NO VIETNÃ EL ÉXITO DE LAS STARTUPS DE COMERCIO ELECTRÓNICO: UN ESTUDIO EMPÍRICO EN VIETNAM

Objective of the study: Although many e-commerce startups have been established in recent years, there is a high rate of business failure in start-up community. In addition, e-commerce in Vietnam is still at a beginning stage with many potentials and risks. The research aims to find impact factors which lead to the success of e-commerce startups in Vietnam. Methodology/approach: The qualitative method was applied to identify appropriate measurement scales. Then, the quantitative questionnaire survey was leveraged to test the research framework based on data from local e-commerce startups. Originality/Relevance: This research focuses on evaluating the impact of founder factors, e-service factors, and external factors on the success of startups in Vietnam. Main results: Research findings show that four factors have significant contribution to e-commerce startups’ success including risk-taking propensity, achievement orientation, reliability of e-service quality, and e-networking. Among the four, risk-taking propensity is the most contributed factor in ecommerce startups’ success. Theoretical/methodological contributions: The study helps to test the measurement scales and contributes an empirical study regarding to the success of startups in a developing country like Vietnam. Social/management contributions: Managerial implications for e-commerce incubators, entrepreneurs, and government are also recommended to improve the success rate of e-commerce startups in Vietnam.
Storytelling and retromarketing : strengthening brand communication

Brands are becoming more aware of the importance of adding value to their products through storytelling. The aim of this article is to raise awareness of the power of storytelling and retromarketing to enhance the effectiveness of brand communication strategies and increase customer loyalty. The study consisted of an analysis of the chemicals produced in the brain during the telling of different types of stories and their influence on consumer behaviours, and of brand archetypes, based on the work of Carl Jung in this area. The study also conducted a review of experiments that demonstrate the economic value of storytelling and retromarketing narratives. The results show that storytelling and retromarketing enhance brand uniqueness and create a deeper, more genuine relationship between companies and Sousa, Vânia, https://orcid.org/0000-0002-9466-948X, Universidade do Porto, vania.gsousa@gmail.com How to cite this article: Sousa, V. (2021). Storytelling and retromarketing: strengthening brand communication. Revista de Marketing Aplicado, vol 25, 2, 44-62. https://doi.org/10.17979/redm.2021. 25.2. 8752 Recibido el 02 de noviembre de 2021 Aceptado el 30 de noviembre de 2021
Seeing and visual reference

Funding information CanadaFirstResearchExcellenceFund, Grant/AwardNumbers:Vision, Science to Applications; EuropeanResearchCouncil, Grant/AwardNumber:Consolidator grant 726251 Abstract Perception is a central means by which we come to represent and be aware of particulars in the world. I argue that an adequate account of perceptionmust distinguish between what one perceives and what one’s perceptual experience is of or about. Through capacities for visual completion, one can be visually aware of particular parts of a scene that one nevertheless does not see. Seeing corresponds to a basic, but not exhaustive, way in which one can be visually aware of an item. I discuss how the relation between seeing and visual awareness should be explicated within a representational account of the mind. Visual awareness of an item involves a primitive kind of reference: one is visually aware of an item when one’s visual perceptual state succeeds in referring to that particular item and functions to represent it accurately. Seeing, by contrast, requires more than successful visual reference. Seeing depends additionally on meta-semantic facts about how visual reference happens to be fixed. The notions of seeing and of visual reference are both indispensable to an account of perception, but they are to be characterized at different levels of representational explanation.
A high performance sine wave inverter controller with capacitor current feedback and "back-EMF" decoupling

This paper presents a state space approach to the problem of controlling a single phase PWM inverter with an LC output filter. These types of inverter are often used in uninterruptable power supplies (UPS) where a sine wave output voltage is to be maintained. Output voltage control is structured around an inner filter capacitor current loop where capacitor current is sensed via a single, small current transformer. This avoids the expense of multiple, active current sensors found in alternative designs. Performance of the capacitor current loop is enhanced with active decoupling of both the DC bus and the equivalent "back-EMF" of the output voltage. The output dynamic stiffness of the system is analyzed and plotted. Experimental results yield less than 0.5% total harmonic distortion (THD) at full load (8 kW), with transient response times of less than 200 /spl mu/s. <<ETX>>
A compact scattering model for the nanoscale double-gate MOSFET

An analytically compact model for the nanoscale double gate metal-oxide semiconductor field effect transistor (MOSFET) based on McKelvey's flux theory is developed. The model is continuous above and below threshold and from the linear to saturation regions. Most importantly, it describes nanoscale MOSFETs from the diffusive to ballistic regimes. In addition to its use in exploring the limits and circuit applications of double gate MOSFETs, the model also serves as an example of how semiclassical scattering theory can be used to develop physically sound models for nanoscale transistors.
Efficient EEG compression using JPEG2000 with coefficient thresholding

This paper outlines a scheme for compressing EEG signals based on the JPEG2000 image compression algorithm. Such a scheme could be used to compress signals in an ambulatory system, where low-power operation is important to conserve battery life; therefore, a high compression ratio is desirable to reduce the amount of data that needs to be transmitted. The JPEG2000 specification makes use of the wavelet transform, which can be efficiently implemented in embedded systems. In this research, the JPEG2000 standard was broken down to its core components and adapted for use on EEG signals with additional compression steps added. Variations on the compression architecture were tested to maximize compression ratio (CR) while minimizing reconstructed percentage root-mean- squared difference (PRD) and power requirements. Tests indicate that the algorithm performs well in efficiently compressing EEG data, without significant loss in signal fidelity.
Research on the Pose Detection and Control Methods of Robot with Series-Parallel Structure

Aiming at the load requirements, positioning accuracy and workflow of building panels installed robot, developed a 6 DOF of a series-parallel hybrid structure installed robot. According to the structural features of parallel mechanism to the installation manipulator, designed a robot attitude sensing system based on the inclination and laser ranging sensor information feedback; according to the characteristics of the building environment, proposed the position detection method of panels to be installed based on the structured light vision; constructed the control system of the installation manipulator, and used teaching mode to achieve robot control and system calibration. The experimental data prove that, the control and sensing systems of panels installed robot, overcome the complexity of the building environment and the diversity of installation object, and can achieve the automated installation of building panels.
Methods and Object-Oriented Software for FE Reliability and Sensitivity Analysis with Application to a Bridge Structure

This paper addresses the growing demand for finite-element software with capabilities to incorporate uncertainty in the input parameters. Reliability and response sensitivity algorithms are implemented in the general-purpose finite-element software OpenSees, which employs an object-oriented programming approach to achieve a sustainable software with focus on maintainability and extensibility. The product is a comprehensive and freely available library of software tools for finite-element reliability and response sensitivity analysis. A numerical example involving a detailed model of a highway bridge with inelastic material behavior and 320 random variables is presented to demonstrate features of the methodology and the software. Importance vectors are employed to rank the input parameters according to their relative influence on the structural reliability. The required response sensitivities are obtained by an extensive implementation of the direct differentiation method.
A fuzzy multi attribute decision making approach for evaluating effectiveness of advanced manufacturing technology – in Indian context

Globalisation has increased opportunities for the manufacturers, as it has increased the customer size but at the same time it has brought competition. Customers are enjoying the variety of products at the minimum cost. Because of this, manufacturers are striving to improve their flexibility, quality of product, delivery time, etc. Manufacturers are adopting advanced manufacturing technologies (AMT), so as to meet these requirements. Adoption of (AMT) is a colossal investment and decision should be taken with proper evaluation. From the literature survey, it is proved that traditional financial methods for evaluating the effectiveness of AMT are not enough as it also enhances many intangible factors like flexibility, quality, employees' satisfaction etc. Therefore, in this paper an endeavour has been made to develop a model for the evaluation of AMT investments by using fuzzy graph theoretic approach (FGTA). FGTA quantifies the intangible factors and based upon these factors gives a single numerical index which is useful for managers to evaluate the effectiveness of AMT.
Effective Single-Parent Training Group Program: Three System Studies

Objective: This study highlights Dr. Elsie Pinkston and colleagues’ research on the effectiveness of behavior parent training and examines the application of single-parent training group (SPG) programs to three parent–child dyads exposed to distressed family circumstances. Methods: Single-system evaluation designs were conducted with two single birth parents, one single foster parent, and each parent’s three respective children, in an effort to appraise the results of a SPG program. Results: Two of the three parent–child dyads benefited from the SPG. Results suggested that there were changes in parent reinforcement and attention behaviors and children’s noncompliant behaviors. Conclusion: Behavioral improvements in single parent and child dyads lend support for the effectiveness of the parent training group for single parents. Implications for practice and future research on SPG programs are discussed.
New mathematical model for analysing three-phase controlled rectifier using switching functions

The aim of this study is to present a set of closed-form analytical equations in order to enable the computation of the three-phase bridge rectifier steady-state performance estimation. The proposed method presented in this study is a fast, accurate and effective mathematical model for analysing three-phase full-wave controlled rectifiers. The steady-state mathematical model is based on the derivation of an appropriate set of switching functions using the general switching matrix circuit (GSMC) techniques. Once the switching functions are derived, the output current, input current and output dc voltage can all be easily derived and generated from the application of this technique. The effect of overlap is accurately modelled and the distortion (notches), frequency content on the input (voltage and current) and output voltage distortion are derived. The proposed mathematical model, unlike conventional analytical methods, can be integrated in the design of active filters. Furthermore, the output voltage reduction, the rms, average and peak values of voltages and currents for the thyristors and any other semiconductor devices used are readily available for the designer by direct substitution into closed-form equations without any need for the waste of time for worst-case scenario simulations. This method can also be applied to other types of converters, specifically to all voltage fed power converters.
Moving to flow [levelled production]

The original definition of lean was the complete and thorough elimination of waste to reduce the timeline from receipt of customer order to delivery. To achieve this more complete definition necessitates the creation of product flow achieved through the implementation of levelled production. This is the foundation of the Toyota Production System, the origin of lean. Levelled production is an essential enabler for moving to flow and to becoming truly lean. But many companies focus on the waste elimination aspect of lean, while ignoring flow and levelled production. Levelled production seems ridiculous for their business so it receives little further thought. This paper discusses the methods on how to establish production levelling.
Using Deep Learning to Identify RFI in HERA Data

Radio Frequency Interference (RFI) refers to the anthropogenic noise mixed in the data captured by the radio telescopes. RFI creates a sharp discontinuity in the data captured by the Hydrogen Epoch of Reionization Array (HERA) telescope. These sharp discontinuities can aﬀect the overall sensitivity of HERA’s measurements in two main aspects: the magnitude of RFI is much greater than the intrinsic sky signal, and unﬂagged RFI introduces errors due to the Fourier transform in HERA’s data processing procedure. Therefore, identifying RFI in HERA data sets is crucial. We present an RFI detection Convolutional Neural Network (CNNRFI) that identiﬁes RFI in HERA’s data sets to address this issue. The network is trained using simulated HERA visibility data and artiﬁcially modeled RFI, where we treat the modeled RFI as the “ground truth” in the training data set. We evaluate the performance of CNNRFI both by comparing the accuracy and precision of RFI found by that CNNRFI to an unseen test dataset of the simulated RFI, as well as predictions made by the Sky-Subtracted Incoherent Noise Spectra (SSINS), an established method for identifying RFI. CNNRFI achieves a precision of 99% in comparison with the HERA simulated data, and a agreement of 67.7% compared to SSINS. This larger discrepancy with SSINS can be explained by the aggressive ﬂagging nature of SSINS, which tends to ﬂag pixels beyond the ones identiﬁed in the algorithm as a means of reducing contamination from data below the noise ﬂoor.
Aeolian dune modelling from airborne LiDAR, terrestrial LiDAR and Structure from Motion–Multi View Stereo

Sand dunes are commonly regarded as a challenge to traditional photogrammetry due their homogeneous texture and spectral response. In this work we present an evaluation of Structure from Motion–Multi View Stereo (SfM-MVS) to obtain high-resolution elevation data of coastal sand dunes based on images acquired by Remotely Piloted Aircraft (RPA). A Digital Elevation Model (DEM) of a dunefield in Southern Brazil was generated from 810 photos captured by an RPA at 100 m above the takeoff point in February 2019. Image matching was successful in all areas of the survey due the presence of superficial features (footprints and sandboard tracks) and visibility of the sedimentary stratification, highlighted by heavy minerals. Altimetric accuracy of the SfM-MVS DEM was validated by comparison with Terrestrial LiDAR (TLS) data collected during the same fieldwork campaign of the RPA flights. The SfM-MVS DEM was then compared to an Airborne LiDAR (ALS) DEM from October 2010. While the SfM-MVS and TLS DEMs are very similar, without any major difference in elevation or in the reconstruction of topographic features, the SfM-MVS DEM presents a small scale surface roughness not visible in the TLS DEM. The Feature Preserving DEM Smoothing (FPD) algorithm was applied to the SfM-MVS DEM with good results in terms of surface smoothing, but without any significant changes in descriptive statistics and error metrics, with an RMSE of 0.08 m and MAE of 0.06 m for both the original and the FPD-filtered DEM. Displacement of dune crest lines from the ALS and SfM-MVS DEMs resulted in a migration rate of ≈5 m/year between 2010 and 2019, in good agreement with rates derived from satellite images and historical aerial photographs of the same area. Sand volume change in the same period showed a decrease of only 0.2%, which can be related to the installation of sand fences to promote dune stabilization and sand removal from the front of the dune field to keep a road open to vehicles. ALS can cover large areas in little time but its high cost still remains a barrier to wider usage, especially by researchers in developing countries. TLS has an intermediate cost but demands more fieldwork and more processing time. In our case we needed three days for the TLS survey and around three weeks to produce a DEM of ≈80 400m2. On the other hand, we were able to cover 1 ar X iv :1 91 0. 06 18 6v 3 [ ph ys ic s. ge oph ] 1 1 A ug 2 02 0 ≈740 900m2 with six flight missions in under three hours, with ≈13 hours processing time in a medium-range workstation. This makes SfM-MVS a low-cost solution with fast and reliable results for 3D modelling and continuous monitoring of coastal dunes.
Journal of Caribbean Ornithology, Vol. 33: Lesser Black-backed Gulls (Larus fuscus) in Saint Vincent and the Grenadines and Grenada

In the Lesser Antilles, the Ringed Kingfisher (Megaceryle torquata stictipennis) is only found in Martinique, Dominica, and Guadeloupe. In Martinique and Guadeloupe, farmers growing bananas used the insecticide chlordecone extensively from 1973 until 1993. Chlordecone is a remnant organochlorine insecticide that bioaccumulates in organisms easily. In 2009, we conducted a survey of the Ringed Kingfisher on Basse-Terre, Guadeloupe, traveling 270 km along 44 rivers to assess the effects of chlordecone on habitat selection behavior. During our survey, we encountered 47 Ringed Kingfishers, which we estimated to be 16 different individuals. A habitat selection analysis revealed that the Ringed Kingfishers were located mainly in sections of rivers flowing through the ombrophilous forest but were absent on the ocean shoreline and in the lower parts of rivers. The Ringed Kingfisher’s distribution in Guadeloupe could be negatively associated with areas heavily polluted by chlordecone. We propose that the widespread use of chlordecone in banana plantations in Guadeloupe had adverse ecological consequences and may be responsible for the absence of Ringed Kingfishers in lowland habitats on the island.
The Design of Experiments for Engineering Studies with Particular Reference to Thermofluids

Studies in engineering science, including thermofluids, almost invariably neglect well-established methods of designing experiments and analysing experimental data, thereby forfeiting efficiency and incurring the risk of drawing false conclusions on effects and errors. The methods, which are compared with the classical approach, are simply described and are illustrated by relevant examples chosen to aid undergraduate teaching. The ideas have application to university laboratory experiments, to research and to quality assurance in industry.