Miracle-dz/UniFAR-FTUs huggingface dataset:
A high efficiency HPF-ZCS-PWM Sepic for electronic ballast with multiple tubular fluorescent lamps

This paper presents a high efficiency Sepic rectifier for an electronic ballast application with multiple fluorescent lamps. The proposed Sepic rectifier is based on a zero-current-switching (ZCS) pulse-width-modulated (PWM) soft-commutation cell. The high power-factor of this structure is obtained using the instantaneous average-current control technique, in order to properly meet IEC61000-3-2 standards. The inverting stage of this new electronic ballast is a classical zero-voltage-switching (ZVS) half-bridge inverter. A proper design methodology is developed for this new electronic ballast, and a design example is presented for an application with five fluorescent lamps 40 W-T12 (200 W output power), 220 V/sub rms/ input voltage, 130 V/sub dc/ dc link voltage, with rectifier and inverter stages operating at 50 kHz. Experimental results are also presented. The THD at input current is equal to 6.41%, for an input voltage THD equal to 2.14%, and the measured overall efficiency is about 92.8%, at rated load.
A Low-Cost Millimeter-Wave High-Gain Slot Antenna Array Fed by Multilayer Waveguide

A millimeter-wave antenna array fed by multilayer waveguide is proposed in this paper. Different from traditional rectangular cavity waveguide, the multilayer waveguide structure used for the antenna is constructed by stacking several thin metal plates. The metal plates are filled with air and do not require any electrical contact. The electromagnetic band gap (EBG) structure is added to the thin metal plates to prevent the leakage of electromagnetic waves within a certain frequency between the metal layers. By using this waveguide structure, manufacturing cost can be greatly reduced. Introduce this waveguide structure into the design of the waveguide slot antenna, and a highperformance millimeter-wave antenna is realized. This 12-element antenna array works at W-band, the gain at the highest point is more than 21 dBi, and the difference between the side lobe and the main lobe exceeds 12 dB. The proposed antenna array could be an excellent candidate for designing millimeter-wave waveguide slot antenna, and can be used for navigation, radar, and other high-frequency communication systems.
The boundary integral equation for curved solid/liquid interfaces propagating into a binary liquid with convection

The boundary integral method is developed for unsteady solid/liquid interfaces propagating into undercooled binary liquids with convection. A single integrodifferential equation for the interface function is derived using the Green function technique. In the limiting cases, the obtained unsteady convective boundary integral equation transforms into a previously developed theory. This integral is simplified for the steady-state growth in arbitrary curvilinear coordinates when the solid/liquid interface is isothermal (isoconcentration). Finally, we evaluate the boundary integral for a binary melt with a forced flow and analyze how the melt undercooling depends on Péclet and Reynolds numbers.
APLIKASI LOCATION BASED SERVICE (LBS) TAMAN MINI INDONESIA INDAH (TMII) BERBASIS ANDROID

Android merupakan platform perangkat lunak untuk peranti bergerak (mobile device) yang didukung oleh Google OS. Android menggunakan versi modifikasi dari kernel Linux yang mampu didistribusikan secara terbuka (open source). Hal ini memungkinkan bagi para pengembang untuk mengatur, memodifikasi, dan membuat aplikasi sendiri. Aplikasi pemetaan merupakan suatu aplikasi mengenai geografis yang telah berkembang. Aplikasi pemetaan ini digunakan untuk menampilkan peta dan informasi dari objek yang dipilih, hal ini yang mendorong penulis untuk membuat aplikasi Peta Wisata Taman Mini Indonesia Indah (TMII). Aplikasi Peta Wisata TMII ini dibuat dengan menggunakan aplikasi Google Maps, Android Development Tools, SQLite, dan Eclipse IDE Java sebagai frameworknya. Sedangkan bahasa pemrograman yang digunakan adalah Java, XML dan SQL. Metode penelitian yang digunakan yaitu pendekatan SDLC (Software Development Life Cycle), yang terdiri dari Fase identifikasi, Fase analisis, Fase perancangan, dan Fase uji coba. Disini nantinya akan didapatkan suatu informasi-informasi dan visualisasi objek dalam bentuk maps yang dapat digunakan sebagai referensi untuk para pengguna perangkat mobile Android dalam pengambil keputusan terutama dalam pencarian lokasi objek wisata yang ada di wilayah TMII. selain itu terdapat rute untuk menuju objek wisata yang dipilih, pencarian objek wisata, dan menu pendukung lainnya. Daftar Pustaka (2001-2012)
Ion exchange resin catalyzed synthesis of methyl butyrate: batch reactor and packed bed reactor studies

ABSTRACT Manufacture of methyl butyrate is presented in this work at different reaction conditions using ion exchange resins as catalyst. With T − 63 as the catalyst, about 38% conversion was obtained at 333 K, mole ratio of 1:1 and 900 rpm. Water was seen to inhibit the reaction, and hence packed bed reactor was used to improve the conversion. Conversion increased to about 60%, thus showing that there is possibility of process intensification.
Practical Framework for Self-healing of Smart Grids in Stable/Unstable Power Swing Conditions

Abstract Lack of a practical solution makes it difficult to heal the network using corrective actions and to achieve smart grid advantages. On the other hand, new advances in computational processes could make advantages of the smart grid to be more accessible if they have been combined with conventional methods in power systems. This article proposes a framework on how advance computational methods can be applied in developing smart grids to improve reliability and security of power systems, especially power system stability. For this purpose, some solutions have been introduced to combine stable/unstable power swing detection methods and new optimization methods to get self-healing of a smart grid.
Delays in Autism Diagnosis for U.S. Spanish-speaking Families: The Contribution of Appointment Availability

ABSTRACT Promoting equity in health services requires an understanding of the mechanisms that produce disparities. Utilizing a sequential, mixed-methods, explanatory study design, we analyzed child-, family-, and organizational-level factors and their association with wait times for an ASD diagnostic evaluation among 353 families scheduled for English and Spanish language appointments (27% Spanish language). A subset of parents and caregivers participated in English and Spanish language focus groups to provide their perspectives on the diagnostic process. Spanish language was associated with greater completion of, and time to evaluations than English language. The only variable found to mediate associations with time-to-evaluation was appointment availability – an organizational factor. Qualitative results elucidate potential explanations for greater Spanish language evaluation completion (e.g., fewer community-based diagnostic options). Results serve as a case study to support the utility and importance of analyzing the influence of organizational-level factors on delays and disparities for childhood health and mental health services. We discuss our findings in relation to strategies that can be widely applied to support equitable services access for childhood diagnostic and intervention services.
A guide to trajectory inference and RNA velocity

Technological developments have led to an explosion of high-throughput single cell data, which are revealing unprecedented perspectives on cell identity. Recently, significant attention has focused on investigating, from single-cell RNA-sequencing (scRNA-seq) data, cellular dynamic processes, such as cell differentiation, cell cycle and cell (de)activation. Trajectory inference methods estimate a trajectory, a collection of differentiation paths of a dynamic system, by ordering cells along the paths of such a dynamic process. While trajectory inference tools typically work with gene expression levels, common scRNA-seq protocols allow the identification and quantification of unspliced pre-mRNAs and mature spliced mRNAs, for each gene. By exploiting the abundance of unspliced and spliced mRNA, one can infer the RNA velocity of individual cells, i.e., the time derivative of the gene expression state of cells. Whereas traditional trajectory inference methods reconstruct cellular dynamics given a population of cells of varying maturity, RNA velocity relies on a dynamical model describing splicing dynamics. Here, we initially discuss conceptual and theoretical aspects of both approaches, then illustrate how they can be combined together, and finally present an example use-case on real data.
Análisis dinámico del mecanismo paralelogramo del cortacogollo desfibrador para la cosechadora cañera cubana CCA- 5000 Dynamic analysis of the mechanism parallelogram of the cortacogollo desfibrador for the cropper Cuban CCA-5000

This paper is a study of the state of stress-strain Analysis of shredder grinder parallelogram mechanism for Cuban sugar cane harvester CCA-5000. Was used the curve of variation of the extreme loads acting on the shredder, from experimental evaluation of the harvester model KTP-2M with the strain gauge over an obstacle, where dynamic coefficients that occur in the center of mass of this body were determined. Was used the Finite Element Method and through linear dynamic analysis was determined the causes of the plastic deformations appeared in the lower tube of shredder parallelogram mechanism in harvesting testing of the new harvester to be tensions 219.3 MPa in the same, being the elastic limit of the steel used 220 MPa. It checks the amendments made to the structure, giving a safety factor of 1.36 for the new model with a rectangular section lower tube, which ensures a reliable behavior of the same during the occurrence of the extreme loads during machine work.
A research on photovoltaic energy controlling system with maximum power point tracking

This paper introduces a photovoltaic energy system, controlled by a DC-DC converter and a single phase bi-directional PWM converter to realize the inversion. A current controlling (MPPT) method of tracking the maximum power point and forcing the system to operate close to this point is used. An artificial neural network is used in the MPPT system and its robustness and insensitivity to the intermittent weather conditions is enhanced. Uc3854 is used as an inversion current controller, which has a high performance in harmonics and power factor.
Stabilizing periodic orbits of forced systems via generalized Pyragas controllers

This brief deals with the problem of designing linear time-invariant feedback controllers to stabilize unstable periodic orbits for a class of sinusoidally forced nonlinear systems. Exploiting the classical circle criterion, a sufficient condition for the stabilization of unstable periodic solutions is derived for a class of controllers that generalizes the time delayed one proposed by Pyragas. Based on this rendition, a technique for designing optimal controllers is proposed. The validity of the technique and the performance of the designed controllers are illustrated via one example concerning the forced Duffing oscillator.
Experiences with operations and autonomy of the Mars Pathfinder Microrover

The Microrover Flight Experiment (MFEX) is a NASA OACT (Office of Advanced Concepts and Technology) flight experiment which, integrated with the Mars Pathfinder (MPF) lander and spacecraft system, landed on Mars on July 4, 1997. In the succeeding 30 sols (1 sol=1 Martian day), the Sojourner microrover accomplished all of its primary and extended mission objectives. After completion of the originally planned extended mission, MFEX continued to conduct a series of technology experiments, deploy its alpha proton X-ray spectrometer (APXS) on rocks and soil, and image both terrain features and the lander. This mission was conducted under the constraints of a once-per-sol opportunity for command and telemetry transmissions between the lander and Earth operators. As such, the MFEX rover was required to carry out its mission, including terrain navigation and contingency response, under supervised autonomous control. For example, goal locations were specified daily by human operators; the rover then safely traversed to these locations. During traverses, the rover autonomously detected and avoided rock, slope, and drop-off hazards, changing its path as needed before turning back towards its goal. This capability to operate in an unmodeled environment, choosing actions in response to sensor input to accomplish requested objectives, is unique among robotic space missions to date.
Where to place a spherical obstacle so as to maximize the first nonzero Steklov eigenvalue

We prove that among all doubly connected domains of R n of the form B 1 \ B 2 , where B 1 and B 2 are open balls of fixed radii such that B 2 ⊂ B 1 , the first non-trivial Steklov eigenvalue achieves its maximal value uniquely when the balls are concentric. Furthermore, we show that the ideas of our proof also apply to a mixed boundary conditions eigenvalue problem found in literature.
A harmonic distortion control technique applied to 6-pulse bridge converters

A practical design aspect for controlling power system harmonics through the use of transformer connections applied to a distributed set of 6-pulse converter-type loads in industrial power distribution systems is presented. Some common system problems associated with harmonic distortion from 6-pulse-type converters are presented. A method for reducing harmonic distortion through the use of transformer bank connections to allow for harmonic cancellation is discussed. <<ETX>>
The role of moral explanations and structural inequalities in experiences of mental illness stigma in Northern Minas Gerais, Brazil

The process of stigmatization within different cultural contexts has long been viewed as essential in understanding the course and outcomes of mental illness. However, little research has examined which cultural constructs and categories are used to explain mental illness, and how they contribute to the way people with mental illness experience stigma and social exclusion, as well as how these beliefs affect healthcare practices. This study examines meanings ascribed to mental illness and experiences of stigma among four groups in urban settings of Minas Gerais, Brazil: persons with mental illness; their families; members of the lay public; and health professionals working at an alternative community-based psychosocial treatment service or a local university hospital. Qualitative methods, including semi-structured interviews and participant observation, were conducted with a purposive sample of 72 participants. Data were analyzed through content analysis. The findings suggest that stigma and discrimination are intrinsically rooted in a systemic process of social exclusion generated by meanings ascribed to mental illness and the structural vulnerabilities of the mental healthcare system. The findings further suggest that structural inequality is a powerful factor behind lay concepts of mental illness and that this is particularly harmful because it reinforces personal blame attributions instead of addressing the hidden structural forces that contribute to mental illness. The study highlights the subtle interrelations between cultural beliefs and structural vulnerabilities that should be addressed in mental health policy in order to diminish the effects of stigma on people with mental illnesses.
The performance of cutinase and pectinase in cotton scouring

Advances in biotechnology and enzymology have brought new lines of research and have accelerated the development of enzymatic applications in wet textile processing for now nearly one decade. Amongst the various stages of cotton preparation, wet textile processing is a highly energy, water and chemicals consuming step. Enzymes are known for their specificity, high efficiency and ability to work under mild conditions and provide a promising solution to these challenges.
Multilevel Analysis of Urban–Rural Variations of Body Weights and Individual-Level Factors among Women of Childbearing Age in Nigeria and South Africa: A Cross-Sectional Survey

Background: An unhealthy body weight is an adverse effect of malnutrition associated with morbidity among women of childbearing age. While there is increasing attention being paid to the body weights of children and adolescents in Nigeria and South Africa, a major surge of unhealthy body weight in women has received less attention in both countries despite its predominance. The purpose of this study was to explore the prevalence of body weights (underweight, normal, overweight, and obese) and individual-level factors among women of childbearing age by urban–rural variations in Nigeria and South Africa. Methods: This study used the 2018 Nigeria Demographic Health Survey data (n = 41,821) and 2016 South Africa Demographic Health Survey (n = 8514). Bivariate, multilevel, and intracluster correlation coefficient analyses were used to determine individual-level factors associated with body weights across urban–rural variations. Results: The prevalence of being overweight or obese among women was 28.2% and 44.9%, respectively, in South Africa and 20.2% and 11.4% in Nigeria. A majority, 6.8%, of underweight women were rural residents in Nigeria compared to 0.8% in South Africa. The odds of being underweight were higher among women in Nigeria who were unemployed, with regional differences and according to breastfeeding status, while higher odds of being underweight were found among women from poorer households, with differences between provinces and according to cigarette smoking status in South Africa. On the other hand, significant odds of being overweight or obese among women in both Nigeria and South Africa were associated with increasing age, higher education, higher wealth index, weight above average, and traditional/modern contraceptive use. Unhealthy body weights were higher among women in clustering areas in Nigeria who were underweight (intracluster correlation coefficient (ICC = 0.0127), overweight (ICC = 0.0289), and obese (ICC = 0.1040). Similarly, women of childbearing age in clustering areas in South Africa had a lower risk of experiencing underweight (ICC = 0.0102), overweight (ICC = 0.0127), and obesity (ICC = 0.0819). Conclusions: These findings offer a deeper understanding of the close connection between body weights variations and individual factors. Addressing unhealthy body weights among women of childbearing age in Nigeria and South Africa is important in preventing disease burdens associated with body weights in promoting Sustainable Development Goal 3. Strategies for developing preventive sensitization interventions are imperative to extend the perspectives of the clustering effect of body weights on a country level when establishing social and behavioral modifications for body weight concerns in both countries.
Redistributive preferences: Why actual income is ultimately more important than perceived income

An emerging consensus claims that ‘subjective’ (mis)perceptions of income inequality better explain redistributive preferences than actual ‘objective’ conditions. In this article, we critically re-assess this view. We compare perceived and actual income positions as predictors for preferences for redistribution. We argue that perceived income is partly endogenous to actual income and its effect on preferences conditional on ideology. Using an original survey experiment from Switzerland, we show that the predictive power of perceived income is lower compared to actual income. Perceived income is only associated with redistribution preferences among centre-right respondents, but not among left-wing respondents. Furthermore, providing respondents with corrective information about their true position in the income hierarchy has no effect on redistribution preferences. These findings go against the new consensus about the superior explanatory power of subjective perceptions of income inequality. We argue instead that absolute objective conditions should be at the centre of explaining redistributive preferences.
Culturally responsive teacher education: do we practice what we preach?

ABSTRACT Research on culturally informed pedagogies (e.g., culturally relevant pedagogy, culturally sustaining teaching, reality pedagogy) has been ongoing for decades, yet very few studies follow teachers into their classrooms after they are introduced to the topic. We conducted an intrinsic case study of three practicing maths teachers after they completed a graduate course specifically on culturally responsive teaching. Our analysis of the data revealed mixed findings. The participants demonstrated sociopolitical consciousness and affirming views of students. However, other aspects of culturally responsive teaching were absent or partial. By interviewing and observing our participants in their classrooms, we gained access to specific and authentic examples from their curriculum and instructional practices, which extended and enhanced their learning about culturally responsive teaching and prompted us to reconsider our course content and pedagogy. We conclude by advocating for continued research that investigates and exemplifies best practices in culturally responsive teacher education.
Effectiveness of a Cancer Bereavement Therapeutic Group

Abstract This study examined the effectiveness of a novel cancer bereavement group. Twenty-seven participants attended a six-session cancer bereavement therapeutic group. Data were collected at baseline, intervention completion, and three-month follow-up. Grief intensity and symptoms of posttraumatic stress disorder (PTSD), depression, and anxiety were reduced postintervention, and self-compassion increased. At follow-up, improvement remained for grief, PTSD, and depression. A small quasi-experimental waiting-list comparison group showed no change on any measure between baseline and waiting-list end. This study provides preliminary evidence that a brief therapeutic group is an effective intervention for cancer bereavement.
The SUPERankle procedure in the treatment of foot and ankle deformities in fibular hemimelia

Objective: To review indications for limb amputation or reconstruction using the SUPERankle procedure in patients diagnosed with Paley type 3 or 4 fibular hemimelia; To evaluate the correction of deformities needed to achieve a stable plantigrade foot, review variations of the original technique and their applicability, and describe challenges encountered in their execution. Methods: Qualitative, retrospective, descriptive study of 4 patients who underwent the SUPERankle procedure between 2019 and 2020 for treatment of foot and ankle deformities in fibular hemimelia. Pre- and postoperative clinical and radiographic evaluations were performed to identify objective evidence of the correction of foot and ankle deformities. The operative techniques employed are described. Results: The included patients met anatomical and psychosocial criteria for reconstruction, as established in the literature. Clinical correction of foot and ankle deformities was achieved, but on radiographic evaluation, there was no statistical difference; this was likely due to the small number of patients, given the rarity of fibular hemimelia. Conclusion: The procedure is reproducible, but requires a knowledgeable, well-trained surgical team. Correction of foot and ankle deformities can be achieved. The choice between amputation or reconstruction should be the result of an informed decision by Family members, supported by a multidisciplinary team. Level of Evidence IV; Qualitative Study; Case Series.