Miracle-dz/UniFAR-FTUs huggingface dataset:
A new stator voltage third harmonic based direct field oriented control scheme

The paper presents a new and straightforward approach to compute instantaneous position and amplitude of the airgap flux in an induction machine using the stator voltage third harmonic component. Compared to previous direct field oriented control (DFOC) schemes also using the third harmonic voltage, the proposed method is simpler and able to exploit a reliable estimation technique practically unaffected by parameter variations. The scheme can be implemented in low and medium performance induction motor drive systems and is especially suited for low speed operations. It is presently used to develop DFOC drives with different features. Experimental tests are shown in order to practically confirm the expected features of the proposed system. <<ETX>>
Eye Glance Behavior Associated with Cell-Phone Use

The purpose of this study is to examine eye-glance patterns of drivers engaged in cell phone related tasks. To observe eye-glance patterns, researchers used naturalistic driving data from the Integrated Vehicle-Based Safety Systems field operational test to construct and tabulate two datasets. One dataset included gaze data that were coded from cell phone conversation clips by fifty different drivers under different driving conditions. The second dataset was created in a similar way using video clips from twenty-four drivers who engaged in visual-manual tasks (e.g., texting and dialing). Mixed-model analyses were conducted. Results showed that drivers’ on-road gazes were longer when they were engaged in a cell phone conversation than when they were not engaged. Off-road gaze length was the same, regardless of task involvement. In contrast, drivers who engaged in visual-manual tasks had substantially shorter on-road gaze length compared to when those same drivers were not involved in visual-manual tasks.
A study reflecting the demographics and comorbidities of children diagnosed with autism spectrum disorder at initial presentation to the KwaZulu-Natal Children’s Hospital

Background. Autism spectrum disorder (ASD) retards the holistic development of a child owing to both inherent and comorbid medical pathology. Despite the profound effect of ASD on a child’s life, information regarding this neurodevelopmental disorder is limited. In South Africa (SA), there is a dearth of knowledge regarding ASD. In addition, the resources available to accommodate the needs of autistic children are largely insufficient in quantity and quality. Objectives. To determine demographics and comorbidities in autistic children at the KwaZulu-Natal Children’s Hospital (KZNCH). Methods. This study was a retrospective chart review conducted at the neurodevelopmental and neuropsychiatric clinics at the KZNCH in Durban, SA. Medical records of autistic children at their initial presentation to KZNCH from 1 January 2017 - 31 December 2017 were obtained and analysed. Results. The study sample comprised 114 study participants. Most participants (87%) presented above 36 months of age to the KZNCH. A 24-month delay was noted between onset of symptoms suggestive of ASD and presentation to a healthcare facility or KZNCH. Almost 50% of participants were awaiting placement in a special school. Attention deficit hyperactivity disorder (ADHD) was the most common comorbidity, affecting 43% of participants. Conclusion. The study illustrated the demographic profiles and comorbidities of autistic children presenting to the KZNCH. However, the medical and social shortcomings in KZN elucidated in this study reinforce the necessity for further research to be conducted and resources to be invested to address the plight of children with ASD.
Use of Neural Networks in Diagnostics of Rolling-Element Bearing of the Induction Motor

Bearing defect is statistically the most frequent cause of an induction motor fault. The research described in the paper utilized the phenomenon of the current change in the induction motor with bearing defect. Methods based on the analysis of the supplying current are particularly useful when it is impossible to install diagnostic devices directly on the motor. The presented method of rolling-element bearing diagnostics used indirect transformation, namely Clark transformation. It determines the vector of the spatial stator current based on instantaneous current measurements of the induction motor supply phases current. The analysis of the processed measurement data used multilayered, one-directional neural networks, which are particularly attractive due to their nonlinear structure and ability to learn. During the research 40 bearings: undamaged, with damages of three types and various degrees of fault extent, were used. The conducted research proves the efficiency of neural networks for detection and recognition of faults in induction motor bearings. In case of tests of the unknown state bearings, an efficiency approach to failure detection equaled 77%.
Use of nephrotoxic medications in adults with chronic kidney disease in Swedish and US routine care

ABSTRACT Background To characterize the use of nephrotoxic medications in patients with chronic kidney disease (CKD) Stages G3–5 in routine care. Methods We studied cohorts of adults with confirmed CKD G3–5 undergoing routine care from 1 January 2016 through 31 December 2018 in two health systems [Stockholm CREAtinine Measurements (SCREAM), Stockholm, Sweden (N = 57 880) and Geisinger, PA, USA (N = 16 255)]. We evaluated the proportion of patients receiving nephrotoxic medications within 1 year overall and by baseline kidney function, ranked main contributors and examined the association between receipt of nephrotoxic medication and age, sex, CKD G-stages comorbidities and provider awareness of the patient's CKD using multivariable logistic regression. Results During a 1-year period, 20% (SCREAM) and 17% (Geisinger) of patients with CKD received at least one nephrotoxic medication. Among the top nephrotoxic medications identified in both cohorts were non-steroidal anti-inflammatory drugs (given to 11% and 9% of patients in SCREAM and Geisinger, respectively), antivirals (2.5% and 2.0%) and immunosuppressants (2.7% and 1.5%). Bisphosphonate use was common in SCREAM (3.3%) and fenofibrates in Geisinger (3.6%). Patients <65 years of age, women and those with CKD G3 were at higher risk of receiving nephrotoxic medications in both cohorts. Notably, provider awareness of a patient's CKD was associated with lower odds of nephrotoxic medication use {odds ratios [OR] 0.85[95% confidence interval (CI) 0.80–0.90] in SCREAM and OR 0.80 [95% CI 0.72–0.89] in Geisinger}. Conclusions One in five patients with CKD received nephrotoxic medications in two distinct health systems. Strategies to increase physician's awareness of patients’ CKD and knowledge of drug nephrotoxicity may reduce prescribing nephrotoxic medications and prevent iatrogenic kidney injury.
Android-Based Learning Media Design with Contextual Learning to Develop Problem-Solving Skills

This study objective is to show that android-based learning media design with contextual learning is valid, practical, and effective in developing mathematical problem solving skills. The research method used is Research and Devolopment. It’s design in this study is 4-D development model consisting of 4 development stages: define, design, develop, and desseminate. The subjects of this study consisted of development subjects (validators) and field trial subjects (a private senior high school in Pontianak, Indonesia). Data collection tools used were validation sheets, questionnaires and mathematical problem solving skill tests. The data analysis technique used descriptive statistics. This study showed that android-based media with contextual learning content was valid, practical and effective in developing mathematical problem-solving skills. In addition, Android-based learning media with contextual learning content could be used as an alternative in learning during Covid 19.
Characterization of Behavioral Symptoms of Older Adults with Neurocognitive Disorder by the Report of Informal Caregivers

Abstract: Behavioral symptoms of people with dementia can negatively affect the mental health of informal caregivers. The aims of this study were to describe the behavioral symptoms of adults diagnosed with dementia based on the report of their caregivers and to characterize the caregivers regarding the level of hope, burden and stress related to care. Twenty informal caregivers participated in the study, with an average age of 54 years, predominantly daughters and wives of the patients, who granted an interview and responded to instruments regarding burden and stress, hope, patient’s characteristics and behavioral problems. Despite a high level of hope, the participants had a burden level compatible with that of caregivers of chronic patients. The most mentioned challenging behaviors were difficulties in carrying out activities of daily living and aggressiveness, predominantly characterized as behavioral excesses. We emphasize the importance of interventions with caregivers of people with neurocognitive disorder, oriented to the management of challenging behaviors.
Internal dynamics of IGBT under zero-voltage and zero-current switching conditions

Soft switching involves turning the semiconductor device on or off with minimal switching stress. Zero voltage switching (ZVS) and zero current switching (ZCS) are the two most popular variants of soft switching schemes. The turn-off performance of insulated gate bipolar transistors (IGBT's) under ZVS and ZCS environments is critically evaluated in this paper. It is shown that the turn-off mechanism under ZVS and ZCS conditions is dissimilar. Charge removal from the drift region during ZVS turn-off is mainly due to carrier sweep-out and recombination. On the other hand, charge removal through the channel during the phase of no device current is shown to be an important mechanism governing the magnitude and extent of the current tail during ZCS turn-off. This also results in significantly reduced turn-off losses of IGBT in ZCS as compared to ZVS. Improved understanding of internal carrier dynamics will lead to better utilization of IGBT in a soft-switching environment.
Pengaruh Cash Coversion Cycle, Networking Capital Terhadap Cash Holding (Studi Empiris Pada Perusahaan Sektor Industri Barang Konsumsi Yang Terdaftar di Bursa Efek Indonesia Periode 2015-2019)

This study aims to determine the effect of cash conversion cycle, net working capital on cash holding on manufacturing companies in the consumer goods industry sector listed on Indonesia Stock Exchange (IDX). The sampel used in this study is a company listed on the Indonesia. The research period was the period of 2015-2019. The sampel of this study was obtained used a purposive-sampling method where 35 companies met the criteria. This research used secondary data and was analyzed using SPSS 26. The data analysis method used in this research was multiple linear regression analysis. The result showed that cash conversion cycle have a negative and significant on cash holding and net working capital have a positive and significant on cash holding. The ability of independent variables to explain the dependent variable is 40,5% and 59,5% was explained by other variables outside of this study
E-commerce on Targeted Poverty Alleviation in Solid Waste Management under Sustainable Environment

As a new mode and new direction of targeted poverty alleviation, e-commerce poverty alleviation has entered the poverty-stricken areas. It has realized that farmers face the market directly and opened a way for high-quality agricultural products to go out of the countryside, It is possible for the improvement of farmers' living standard, and the comprehensive utilization of solid waste can guarantee the sustainable development of economy, environment and society. This paper mainly uses the methods of literature research, interdisciplinary analysis and questionnaire survey. Firstly, it introduces the basic situation of a city. Secondly, it introduces the current situation of e-commerce poverty alleviation in a city from the perspective of policy system, helping agriculture out of poverty, infrastructure and supporting service facilities, This paper systematically analyzes the current situation of e-commerce poverty alleviation and the effectiveness of e-commerce poverty alleviation, and finds out the following problems: the leadership mechanism and policy system of e-commerce are not perfect, and the enthusiasm and degree of farmers to use e-commerce are low; then, the paper analyzes that the solid waste management in a city is still insufficient, which hinders the sustainable development of e-commerce poverty alleviation. The results of this study show that: the publicity of e-commerce targeted poverty alleviation work is not in place, many farmers do not understand e-commerce poverty alleviation, which leads to the local e-commerce poverty alleviation work is not carried out well, and the enthusiasm of farmers to use e-commerce is not high. The construction of infrastructure and supporting service facilities has not been fully covered, only 38% of the farmers think that the road construction is OK, and the broadband network coverage can not achieve home network. Only 83.8% of the rural solid waste can be utilized comprehensively, and 16.2% of the solid waste can not be used, which causes environmental pollution and hinders the sustainable development of e-commerce targeted poverty alleviation.
Factors influencing the safety of urban residential collector roads

ABSTRACT This study investigated the impact of various road elements on collision frequencies for urban residential collector roads. Negative binomial safety performance functions were developed for total collision occurrence and severity using 4 years of data from the City of Edmonton. The proposed models were estimated using the maximum likelihood estimation technique. Scaled deviance and the Pearson chi-squared statistic were used to assess the models’ goodness of fit. Results revealed that the property-damage-only (PDO) collision model has the same significant covariates as the total collisions model. For predicted total and PDO collisions, there is a statistically significant positive relationship between collisions and access-point density, stop-controlled intersection density, the presence of a horizontal curve, licensed premises, seniors’ centers, and on-street parking. For severe (i.e., fatal and injury) collisions, the results were quite similar to the total and PDO collisions with some exceptions (e.g., number of lanes, bus-stop density). On the contrary, there is a significant negative relationship between predicted severe collisions and the presence of a median, center line, and manned enforcement. The city authority could use this information to assess the associated safety risk of residential collector roads and, hence, prioritize collision prone road segments.
The Prevalence of blaNDM-1 in Clinical Isolates of Carbapenem-resistant Pseudomonas Aeruginosa: A Systematic Review

Background: Pseudomonas aeruginosa (P. aeruginosa) is a gram negative bacteria that is known to cause nosocomial infections. Carbapenem is used to treat the damage caused by P. aeruginosa, however it is becoming resistant to carbapenems because of the production of β-lactamases. The objectives of the study were to systematically review the prevalence of blaNDM-1 in carbapenem-resistant Pseudomonas aeruginosa (CRPA) and to review and analyze the clinical sources as well as the antibiotic resistance profile of CRPA carrying blaNDM-1. Methods: The researchers systematically searched PubMed, ScienceDirect, and Google Scholar. Studies that met the inclusion criteria were included in the review. In assessing the methodological quality of the included studies, the JBI Critical Appraisal Checklist for Studies Reporting Prevalence Data and the JBI Critical Appraisal Checklist for Case Reports were used. Results: A total of nine studies were included in which eight were cross-sectional studies and one was a case report. The highest prevalence rate reported was 54.55% in blaNDM-1 positive CRPA isolates among the cross-sectional studies. The three most frequent sources of clinical isolates of CRPA carrying blaNDM-1 include urine, wound discharge, and tissue, among the included studies. Lastly, this review showed that among the included studies, CRPA isolates carrying blaNDM-1 were most resistant to ceftazidime and gentamicin. Conclusions: There is varying prevalence of blaNDM-1 in CRPA in different countries. Urine, wound discharge, and tissue specimens being the most frequent sources of CRPA isolates carrying blaNDM-1 poses a challenge that must be given attention by the infection control committee, thus the need for proper handling and processing of clinical specimens. Resistance to ceftazidime and gentamicin among the CRPA isolates carrying blaNDM-1highlights the growing challenge of successfully treating infections caused by this bacteria. This challenge reminds us of the importance and purpose of antibiotic stewardship that emphasizes the improvement of proper antibiotic prescription by the physicians and proper antibiotic use by the patients that can help in preventing harm and antibiotic resistance. Doi: 10.28991/SciMedJ-2021-0304-9 Full Text: PDF
Building information modeling and quantity surveying practice

ربتعت ةعانص دييشتلا اهعون نم ةديرف عساو قاطن ىلع . تاسرامملا ريوطتل ةردقلا اهيدل تامولعملا ءانب ةجذمن مظن ةيلاحلا و لعج سايق دييشتلا موسر نم تايمكلا ةقيرطب متت ةيلآ . كانه اضيأ ددهت دق تاروطتلا هذه لثم نأ فواخم تايمكلا حسم ةنهم رارمتسا . تايمكلا يحاسم رودو تامولعملا ءانب ةجذمن مظن نيب ةقلاعلا فشكتست ةساردلا هذه دييشتلا ةعانص يف . حضوي ثحبلا اذه أ تايمكلا يحاسمل ةيديلقتلا راودلأا ىدحتت تامولعملا ءانب ةجذمن مظن ن أو دييشتلا ةعانصل اهتيمه . مظنلا يف ثوحبلا نم ديزملا ءارجإو تايمكلا يحاسمل ةحقنم جهانم ريوطتب يصون نحن سايقلل ةدحوملا .
Adaptive finite-element ballooning analysis of bipolar ionized fields

This paper presents an adaptive finite-element iterative method for the analysis of the ionized field around high-voltage bipolar direct-current (HVDC) transmission line conductors without resort to Deutsch's assumption. A new iterative finite-element ballooning technique is proposed to solve Poisson's equation wherein the commonly used artificial boundary around the transmission line conductors is simulated at infinity. Unlike all attempts reported in the literature for the solution of the ionized field, the constancy of the conductors' surface field at the corona onset value is directly implemented in the finite-element formulation. In order to investigate the effectiveness of the proposed method, a laboratory model was built. It has been found that the calculated V-I characteristics and the ground-plane current density agreed well with those measured experimentally. The simplicity in computer programming in addition to the low number of iterations required to achieve convergence characterize this method of analysis.
Spatial and temporal fading correlations of a uniform circular array smart antenna in urban vehicular propagation

For smart antenna systems, the space‐time correlation of received signals at an antenna array is a crucial parameter in most adaptive beamforming techniques. In this paper, we experimentally investigate the variation of spatial and temporal fading correlations and the eigenspread of a space–time correlation matrix for a seven‐element uniform circular array (UCA) under the line‐of‐sight (LOS) and the non‐line‐of‐sight (NLOS) urban propagation conditions. A space‐time fading correlation model for the UCA, which depends on angular distribution of multipaths, array geometry, Doppler shift, and time offset, is also proposed. The results show that spatial correlations between any pair of antenna elements in the NLOS propagation are less than those in the LOS propagation, and temporal correlations are approximately the same for both propagation conditions. The NLOS propagation causes larger eigenspread for the space‐time correlation matrix, as compared to the NLOS propagation. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 61–65, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11285
CMRR enhancement techniques for current-mode instrumentation amplifiers

The current-mode instrumentation amplifier based on second-generation current conveyors (CCII) offers many advantages over conventional instrumentation amplifier architectures. It does not need any matched components to reach high CMRR and its bandwidth is not gain-bandwidth product limited. However, improving the CMRR of this amplifier is not as straightforward as with voltage-mode topologies. Therefore, in this paper the matrix representation of the current conveyor is extended to include all linear nonidealities and based on this an enhanced current-conveyor macromodel is derived. Using this model the common-mode behavior of the current-mode instrumentation is discussed in detail. Furthermore, different CMRR enhancement techniques of current-mode instrumentation amplifiers are discussed and compared. As an example, a new current-mode instrumentation amplifier topology is realized with AD844 current-feedback operational amplifiers. The new instrumentation amplifier provides approximately 40 dB of improvement on the high-frequency CMRR up to the -3-dB corner frequency and even higher, without any matched components. Furthermore, composite conveyor techniques improving the instrumentation amplifier performance are discussed. Also, other conveyor applications affected by similar nonidealities are briefly reviewed.
Controlled power-interface between solar cells and AC source

A novel interface circuit between solar cells and a commercial AC bus using Van Allen's multivibrator is presented. In this circuit, the AC source is used for the backup of solar cells, and the source and load power flow is automatically balanced by the circuit itself without any external phase control. Based on an analysis of the characteristics of the oscillator, the authors describe a novel method to control the DC power from the solar cells according to the current load conditions as well as a simple and fast optimization method to derive the maximum solar power. <<ETX>>
Single-phase Z-source PWM AC-AC converters

The letter proposes a new family of simple topologies of single-phase PWM ac-ac converters with a minimal number of switches: voltage-fed Z-source converter and current-fed Z-source converter. By PWM duty-ratio control, they become "solid-state transformers" with a continuously variable turns ratio. All the proposed ac-ac converters in this paper employ only two switches. Compared to the existing PWM ac-ac converter circuits, they have unique features: providing a larger range of output ac voltage with buck-boost, reversing or maintaining phase angle, reducing in-rush and harmonic current, and improving reliability. The operating principle and control method of the proposed topologies are presented. Analysis, simulation, and experimental results are given using the voltage-fed Z-source ac-ac converter as an example. The analysis can be easily extended to other converters of the proposed family. The proposed converters could be used in voltage regulation, power regulation, and so on.