Miracle-dz/UniFAR-FTUs huggingface dataset:
Proposta de identificação dos parâmetros do modelo de bateria para uso na modelagem de sistemas de partida de veículos automotivos.

The aim of this study was to investigate the most suitable lead-acid battery model, used in vehicular application, to the discharge condition which occurs during a Cold Crank test, and to propose a methodology to identify the battery parameters from experimental tests. The Cold Crank simulation was the motivation for this research. Among the various studied models, were selected those that describe the battery dynamic during a discharge process and that are based on electrical circuits. Jackey model was chosen because it has an equivalent circuit with suitable complexity to the aim. After some simplifications and using 1 Kirchhoff’s Law, the battery equation was defined, which calculates the terminal voltage for a given constant discharge current. Also, it was adopted some laws proposed by Jackey and an alternative way to describe R1. Some parameters from battery equation were defined using the open circuit voltage (OCV) as function of state of charge (SOC), the equation of SOC variation as function of time and simplified circuit for the initial time. For the others parameters, a solving methodology was introduced and implemented in Matlab® environment. Usage of experimental discharge curves and with the help of genetic and local search algorithms, the unknown parameters were estimated in order to minimize the error between calculated and experimental values. Finally, it was presented the parameters variation as function of discharge current. With the use of curves that approximate this variation, some examples were generated to show that the calculated values remain consistent in both shape and range when compared to experimental values for others current levels. In this way, the aim was reached since methodology produced good results even with limited number of experimental discharge curves.
Chaotic Analysis of the Velocity Signal in Impinging Stream Mixer

The velocity signal of the flow field in Impinging Stream Mixer (ISM) was measured with Laser Doppler Anemometer. A de-noising method for velocity signal in ISM based on wavelet threshold was used. It is obtained that the attractor of the system possess infinite self-similar nested structure by comparing the strange attractor before and after de-noising, which is based on phase space reconstruction theory. It is shown that K entropy and the largest Lypunov exponents have the similar tendency in spatial distribution through scientific computation, however, the stratification of K entropy is more obvious. The value of K entropy and the largest Lypunov exponents are both positive, proving that the system is chaotic. The results indicate that K entropy and Lyapunov exponents can be increased by improving the rotating speed, the disorder and unpredictability of chaos system will increase homogeneously, so as to promote the micro-mixing and improve work efficiency
LPC parameter quantization at 600, 800 and 1200 bits per second

Pitch-excited linear predictive coding (LPC) is widely used to code speech at 2400 b/s. The authors describe a method of coding LPC parameters which reduces the required channel bandwidth from 2400 b/s to 600-800 b/s. This method uses a split vector quantizer to code spectral parameters at 18 to 22 b/frame without excessive memory requirements. It also exploits interframe redundancy by block coding the pitch, voicing, and energy parameters, and by selectively interpolating the spectral parameters. When operating at less than 700 b/s, the system achieved a score of 90 for a three male-speaker diagnostic rhyme test. <<ETX>>
A directed acyclic graph for pop-up card design

Pop-up cards are an interesting form of paper art with intriguing geometrical properties. Normally, there are two types of pop-up cards. Origami architecture is a 90-degree card and a v-fold pop up is a 180-degree card. Recently, some approaches have been proposed to aid in the design of a pop-up card. Most of the works on pop-up crafting have used a software tool to design pop-up cards. However, a design tool for a 90-degree card cannot be adopted for the design of a 180-degree card. For the same reason, a method for producing a 180-degree card also cannot be applied to a 90-degree card. This paper proposes a directed acyclic graph (DAG) for designing both types of pop-up cards. These two types of pop-up cards could be created with DAG data structure. The DAG algorithm ensures that the pop-up card is foldable, stable, and intersection-free when opened and closed. The proposed method is demonstrated with various paper pop-up cards, and experimental examples are presented.
Ten simple rules for investigating (meta)genomic data from environmental ecosystems

1 UWA School of Agriculture & Environment, University of Western Australia, Perth, Australia, 2 School of Physics, Mathematics and Computing, University of Western Australia, Perth, Australia, 3 The Marshall Centre of Infectious Diseases, School of Biological Sciences, The University of Western Australia, Perth, Australia, 4 Centre for Environment & Life Sciences, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Floreat, Australia
The Nonlinear Dynamics of Cyclone Waves

Abstract The development of atmospheric cyclones is studied from the viewpoint of the instability of large-scale wave perturbations superimposed on a zonal current. The stability properties of the observed mean January flow are investigated and the linear results are extended to include the effects of nonlinear processes on the growth of a cyclone-scale wave. An hemispheric model is employed in this investigation and solutions are obtained by spectral techniques. It is found that the observed atmospheric zonal current is highly unstable in a hydrodynamic sense. The instability is of a baroclinic character with barotropic stabilizing effects. The nonlinear computations show that the growth of the most unstable waves is brought to a halt when the perturbation kinetic energy reaches a level consistent with atmospheric observations. The barotropic energy exchanges are found to play a major role in this process by feeding a large amount of kinetic energy into the zonal flow when the baroclinic energy conversio.
Factors associated with severity and persistence of fatigue in patients with primary biliary cholangitis: study protocol of a prospective cohort study with a mixed-methods approach (SOMA.LIV)

Introduction Fatigue is a common symptom and the major ‘unmet need’ in the management of patients with primary biliary cholangitis (PBC). To date, only few prospective studies have addressed the development of PBC-associated fatigue over time. At the same time, few biological and psychosocial risk factors and mechanisms have been identified that could explain the development and maintenance of fatigue in PBC. It is the overall aim of this study to identify factors that determine the course and severity of fatigue in PBC, and to target these factors within deliverable interventions in order to improve patients’ quality of life. Methods and analysis To identify biological and psychosocial risk factors for severe fatigue, a prospective 12-month cohort study with one baseline and two follow-up measurements will be conducted. In a cross-sectional part, we will simultaneously examine clinically relevant biomedical and psychosocial factors and systematically assess and compare associations and interactions between these factors and fatigue in n=240 patients with PBC (a patient group severely affected by fatigue) and n=240 patients with primary sclerosing cholangitis, a control cholestatic liver disease group much less affected by fatigue. In a prospective part, we will longitudinally monitor these variables and assess their predictive value at 12-month follow-up. Within an embedded mixed-methods design, we will conduct an experimental study and qualitative interviews in patients with newly diagnosed PBC. Ethics and dissemination The study was approved by the Ethics Committee of the Hamburg Medical Association (2020–10196-BO-ff). The study will shed light onto the mechanisms underlying the evolvement and maintenance of fatigue in patients with PBC and enable the development of evidence-based intervention strategies. Findings will be disseminated through peer-reviewed publications, scientific conferences and the involvement of relevant stakeholders, patients and the lay public. Trial registration number ISRCTN14379650.
On the Applicability of an Isochronous Integration Framework for Parabolic/Hyperbolic Heat Conduction Type Problems

We demonstrate the applicability of a new isochronous integration (iIntegration) computational framework for the analysis of transient first/second-order systems via the new generalized single step single solve (GS4) family of algorithms, capable of simultaneously being applied to first- and second-order systems in time while providing attractive numerical and order-preserving attributes to capture the problem physics. To illustrate, we consider a recently developed model of heat conduction that was proposed to govern thermal transport from nano- to macro-scales, and is known in the literature as the C- and F-processes heat conduction model. This model inherits unique features and can represent either first- or second-order parabolic/hyperbolic heat conduction governing equations. A derivation of the model is first summarized, followed by the numerical discretization procedure and illustrative examples demonstrating the practicality and convenience of the new unified approach for modeling and analysis.
Introduction to fuzzy arithmetic : theory and applications

We were rather pleased to read the review of our book, Introduction to Fuzzy Arithmetic: Theory and Applications. This review was done quite carefully by Caroline M. Eastman of the University of South Carolina, and we are grateful to her for pointing out many interesting, positive aspects as well as some shortcomings of our book. As members of the fuzzy community, we are concerned with studies and developments of concepts and techniques basic to the analysis of uncertainty arising from human perception, thinking, and reasoning processes. In this book we present such concepts and some novel tools for dealing with uncertainties. We start our introduction with the definition for the interval of confidence [al, a2], where al and a2 represent, respectively, the lower and upper bounds of our (subjective) confidence. Next, we introduce some arithmetic operations on these numbers. We then introduce the level of presumption ue [13, 1] and, using it, introduce the uncertain or fuzzy number that is so pervasive in our reasoning process. The reviewer has rightly pointed out that in certain situations, interval arithmetic can be considered a subset of fuzzy arithmetic, the main topic of our book. However, we intentionally did not want to confuse the issue by introducing interval arithmetic and then giving a generalization. We liked our approach, as have many other researchers and students who have used the book. In our approach, we have been guided throughout by a desire to lay a firm foundation for the definition of fuzzy numbers using the basic concept of level of confidence. We have introduced many novel mathematical operations based on this concept and have presented many generalizations. In addition, we have presented several operations and functions of fuzzy numbers, such as integer modulo operations, trigonometric functions, and hyperbolic functions. These studies have been included for students as well as researchers who wish to have an extended view of the theory. We have attempted to give a thorough exposition of fuzzy numbers; this exposition is illustrated by about 115 worked-out examples, 150 diagrams, and 90 tables. We did not include problems or exercises, which would have put this book in the category of a textbook. The subtitle of the book is "Theory and Applications," but as is rightly
1. Ecometrics: Toward a Science of Assessing Ecological Settings, with Application to the Systematic Social Observation of Neighborhoods

This paper considers the quantitative assessment of ecological settings such as neighborhoods and schools. Available administrative data typically provide useful but limited information on such settings. We demonstrate how more complete information can be reliably obtained from surveys and observational studies. Survey-based assessments are constructed by aggregating over multiple item responses of multiple informants within each setting. Item and rater inconsistency produce uncertainty about the setting being assessed, with definite implications for research design. Observation-based assessments also have a multilevel error structure. The paper describes measures constructed from interviews, direct observations, and videotapes of Chicago neighborhoods and illustrates an “ecometric” analysis—a study of bias and random error in neighborhood assessments. Using the observation data as an illustrative example, we present a three-level hierarchical statistical model that identifies sources of error in aggregating across items within face-blocks and in aggregating across face-blocks to larger geographic units such as census tracts. Convergent and divergent validity are evaluated by studying associations between the observational measures and theoretically related measures obtained from the U.S. Census, and a citywide survey of neighborhood residents
Edge Rotational Magnons in Magnonic Crystals

It is predicted that in 2D magnonic crystals the edge rotational magnons of forward vol-ume magnetostatic spin waves can exist. Under certain conditions locally bounded magnons may ap-pear within the crystal consisting of the ferromagnetic matrix and periodically inserted magnetic/non-magnetic inclusions. It is also shown that interplay of different resonances in 2D magnonic crystalmay provide conditions for spin wave modes existence with negative group velocity.
Proportional hazards regression with interval-censored and left-truncated data

This paper considers the estimation of the regression coefficients in the Cox proportional hazards model with left-truncated and interval-censored data. Using the approaches of Pan [A multiple imputation approach to Cox regression with interval-censored data, Biometrics 56 (2000), pp. 199–203] and Heller [Proportional hazards regression with interval censored data using an inverse probability weight, Lifetime Data Anal. 17 (2011), pp. 373–385], we propose two estimates of the regression coefficients. The first estimate is based on a multiple imputation methodology. The second estimate uses an inverse probability weight to select event time pairs where the ordering is unambiguous. A simulation study is conducted to investigate the performance of the proposed estimators. The proposed methods are illustrated using the Centers for Disease Control and Prevention (CDC) acquired immunodeficiency syndrome (AIDS) Blood Transfusion Data.
Singular value decomposition for the truncated Hilbert transform: part II

Hilbert transform is a very important tool in computed tomography. Image reconstruction from truncated tomographic data can be reduced to the problem of inverting the Hilbert transform knowing ψ on the interval [a2, a3], where a1 < a2 < a3 < a4. In this paper, we obtain a singular value decomposition for the operator .
Helioseismology program for Solar Dynamics Observatory

An overview of the science investigation program for the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO) space mission scheduled for launch in 2008 is presented. The HMI investigation encompasses three primary objectives of the Living With a Star Program:. rst, to determine how and why the Sun varies; second, to improve our understanding of how the Sun drives global change and space weather; and third, to determine to what extent predictions of space weather and global change can be made and to prototype predictive techniques. Helioseismology provides unique tools to study the basic mechanisms of the Sun's magnetic activity and variability. It plays a crucial role in all HMI investigations, which include convection-zone dynamics and the solar dynamo; origin and evolution of sunspots, active regions and complexes of activity; sources and drivers of solar activity and disturbances; links between the internal processes and dynamics of the corona and heliosphere; and precursors of solar disturbances for space-weather forecasts. We describe new unique opportunities for helioseismology studies with HMI data, in combination with data from the other SDO instruments, Atmospheric Imaging Assembly (AIA) and Extreme-ultraviolet Variability Experiment (EVE), and also from various space and ground-based observatories. The complete HMI science investigation and data analysis plan is available at http://hmi.stanford. edu. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Analysis Of Interferograms From Waxicons

Axicon elements are used in cylindrical optical systems such as high-power chemical lasers. Interferometric tests of such elements cannot be interpreted by standard methods. Axicon aberrations of cone error and decenter error are defined to help interpret such interferograms. A preprocessing option was added to FRINGE to treat axicon data. An example interferogram has been analyzed.
Star Testing Astronomical Telescopes: A Manual for Optical Evaluation and Adjustment

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New species, new records, and re-descriptions of two species of the genus Oligonychus Berlese (Acari: Prostigmata: Tetranychidae) from Saudi Arabia

Abstract Spider mite fauna of the genus Oligonychus Berlese (Acari: Prostigmata: Tetranychidae) was comprehensively explored from natural and cultivated vegetation in Saudi Arabia (SA), during the years 2018 to 2020. One new species, Oligonychus washingtoniae sp. nov., and three new records, O. coniferarum (McGregor, 1950), O. dactyloni Smiley & Baker, 1995, and O. tylus Baker & Pritchard, 1960, are reported for the first time from SA. The new species, O. washingtoniae sp. nov. is described and illustrated from Washingtonia filifera (Lindl.) H.Wendl. (Arecaceae). The species O. dactyloni, and O. tylus are re-described, which were briefly described previously.
Determination of welding residual stresses by inverse approach with eigenstrain formulations of BIE

Based on the concept of eigenstrain, a straightforward computational model of the inverse approach is proposed for determining the residual stress field induced by welding using the eigenstrain formulations of boundary integral equations (BIEs). The eigenstrains are approximately expressed in terms of low-order polynomials in the local area around welded zones. The domain integrals with polynomial eigenstrains are transformed into the boundary integrals to preserve the favourable features of the boundary-only discretization. The sensitivity matrices in the inverse approach for evaluating the eigenstrain fields are constructed by either the measured deformations on the boundary or the measured stresses in the domain after welding over selected measuring points, or by both the measured information. It shows from the numerical examples that the results of residual stresses from measured deformations are always better than those from measured stresses but they are sensitive to experimental noises. The results from stress measurements can be improved by introducing a few deformation measuring points while reducing the number of points for stress measuring to reduce the cost in practice.
MeganServer: facilitating interactive access to metagenomic data on a server

Motivation Metagenomic projects of large sequencing datasets (totaling hundreds of gigabytes of data). Thus, computational preprocessing and analysis are usually performed on a server rather than on a personal computer. The results of such analyses are then usually explored interactively. One approach is to use MEGAN, an interactive program that allows analysis and comparison of metagenomic datasets. Previous releases of MEGAN have required that the user first download the computed data from the server, an increasingly time-consuming process. Here we present Megan Server, a stand-alone program that serves MEGAN files to the web, using a RESTful API, facilitating interactive analysis without downloading the complete data. We describe a number of different application scenarios. Availability Megan Server is provided as a standalone program tools/megan-server in the Megan6 software suite, available at https://software-ab.cs. uni-tuebingen.de/download/megan6.
New marine heterotardigrade lineages (Echiniscoididae) from the tropics

Abstract Echiniscoididae are the only family of the clade Echiniscoidea residing in marine habitats. Their characteristic feature is the multiplication of claws on legs, commonly regarded as an adaptation to unstable tidal environment. Although DNA barcoding data indicated the presence of numerous unnamed candidate species within Echiniscoides about a decade ago, only recently have new species been formally described. In this paper, we present new genetic, morphological and morphometric data and establish five Echiniscoides species found in samples acquired from various tropical regions: Echiniscoides basalticus sp. nov. (Mauritius, Indian Ocean), Echiniscoides bufocephalus sp. nov. (Qatar, Indian Ocean), Echiniscoides lichenophilus sp. nov. (Dominican Republic, Atlantic Ocean), Echiniscoides musa sp. nov. (Brazil, Atlantic Ocean), and Echiniscoides trichosus sp. nov. (Rapa Nui, Pacific Ocean). We discuss the taxonomic importance of cuticular sculpturing in Echiniscoididae. Finally, we elevate all subspecies of Echiniscoides sigismundi to species level. The key to all echiniscoidids is provided. http://www.zoobank.org/urn:lsid:zoobank.org:pub:63154710-C3BA-402A-A11B-C211DAE59CAB