Miracle-dz/UniFAR-FTUs huggingface dataset:
Aperture Efficiency Predictions in Symmetrical Paraboloidal Reflector Antennas With Nonplanar Log-Periodic-Type Feeds

Nonplanar log-periodic-type antennas are attractive as wideband reflector feeds since they can be arranged to provide an axially symmetric radiation pattern that is stable over a wide bandwidth with near constant input impedance. However, these antennas have a frequency-dependent phase center that causes de focusing and degrades reflector antenna performance when used in wideband systems. This letter presents a technique, which includes radiation pattern as well as defocusing effects, to predict an upper bound for reflector system performance when a nonplanar log-periodic feed is used, resulting in useful design guidelines. Predicted results compare favorably with physical optics simulations.
Bayesian maximum entropy interpolation of sea surface temperature data: A comparative assessment

ABSTRACT Sea surface temperature (SST) is an important oceanography attribute that has been used to study ocean climatic conditions, ocean dynamics and air-sea interactions. In the present work, the Bayesian maximum entropy (BME) method was used to interpolate a FY-3 C /VIRR satellite dataset in the region with coordinates 120°-150°W and 45°-60°S and during January 2020. A novel approach of constructing valuable soft data was developed by combining BME interpolation with highly correlated SST day and night data differences. The BME interpolation accuracy was assessed by cross-validation, and the results showed that the average RMSE (root mean squared error) was 0.700 and the average bias was 0.441°C. Furthermore, using the Argo data as a basis of comparison, the coverage and accuracy of the BME interpolation of the FY-3 C/VIRR satellite SST dataset were compared numerically with those of the Ordinary Kriging (OK) interpolation of the FY-3 C/VIRR satellite SST dataset and the Optimum Interpolation Sea Surface Temperature (OISST) of the AVHRR satellite SST dataset. It was found that BME had the best SST interpolation performance among the three methods with the lowest average bias and the largest correlation coefficient. Although OISST had a full product coverage rate overall (due to its use of more perfect treatment means), BME’s coverage rate (97.5%) considerably improved that of the FY-3 C/VIRR SST data. Also, both the BME and OK products maintained a 12hrs temporal resolution and a 0.05 decimal degrees longitude/latitude spatial resolution, which is an improvement over OISST data with a 24hrs time resolution and a 0.25 decimal degrees longitude/latitude spatial resolution. Another advantage of BME is that because of its broad theoretical support its performance in practice can be improved further as more knowledge sources become available (which can only be incorporated by BME).
Classical solutions to a Hartree type system

This paper is concerned with positive classical solutions to the nonlocal system of Hartree type −Δu=1|x|n−α∗vpvp−1inRn,−Δv=1|x|n−β∗uquq−1inRn,\begin{equation*} \def\eqcellsep{&}\begin{array}{rcl} \hspace*{85pt}-\Delta u &=& \displaystyle {\left(\frac{1}{|x|^{n-\alpha }} * v^p\right)} v^{p-1} \quad \text{ in }\mathbb {R}^n, \hspace*{-85pt}\vspace*{6pt}\\ \hspace*{85pt} -\Delta v &=& \displaystyle {\left(\frac{1}{|x|^{n-\beta }} * u^q\right)} u^{q-1} \quad \text{ in }\mathbb {R}^n, \hspace*{-85pt}\end{array} \end{equation*}where n≥3$n\ge 3$ and 0
A Study of Practices and Outcomes of HRM in Pakistan

HRM is capable of employee’s development and enhanced organizational competitiveness, thus it can contribute positively for developing countries. However, there is poor understanding and limited research about HRM in developing countries context. Pakistan also embraced HRM almost a decade ago; however, the experience is producing mix results. The current study is carried out with the objective to assess the HRM Practices and the HRM outcomes in Pakistan. The study utilizing semi-structured interviews and data was collected from sixty HR Personnel working in various organizations. Key findings of the study are that despite implementation of different HRM practices, overall degree of HRM sophistication is low. Moreover, HRM is producing positive outcomes including diversity, better discipline, and superior performance. Some negative HRM outcomes including bureaucracy, corruption, and unnecessary control are also reported in this study. The results point towards limited sophistication of HRM function in Pakistan which needs to be increased in scope to produce more favorable outcomes.
Analysis and control design of paralleled DC/DC converters with current sharing

The paper presents a general small-signal stability analysis of a paralleled DC/DC power converter system. The framework is specialized in order to include both the "democratic" and "master-slave" current-sharing schemes. Design examples illustrate how to obtain stable current sharing. The authors show how paralleled power converters can become unstable (even when active current-sharing is absent) and discuss the influence of the number of power converters paralleled.
High performance stacked crystal filters for GPS and wide bandwidth applications

Stacked Crystal Filters, (SCF), are composed of multi-layers of piezoelectric and metal layers. Normally these filters have a complex frequency spectrum containing near-in spurious responses. However, by having the SCF formed in a Solidly Mounted Resonator (SMR) format, the performance of the device is greatly improved by the finite bandwidth of the SMR reflector. The conventional SCF also has a bandwidth that is too small for some wireless applications. This paper will describe the design and performance issues associated with stacked crystal filters using bulk wave thin films with aluminum nitride as the piezoelectric. Filters without spurious responses, filters having wide bandwidths, and filters operating at frequencies up to 8.5 GHz will be described in addition to GPS filters.
Optimized Type-2 Fuzzy Frequency Control for Multi-Area Power Systems

The objective of this study is minimizing the frequency deviation due to the load variations and fluctuations of renewable energy resources. In this paper, a new type-2 fuzzy control (T2FLC) approach is presented for load frequency control (LFC) in power systems with multi-areas, demand response (DR), battery energy storage system (BESS), and wind farms. BESS is used to reduce the frequency deviations caused by wind energy, and DR is utilized to increase network stability due to fast load changes. The suggested T2FLC is online tuned based on the extended Kalman filter to improve the LFC accuracy in coordination of DR, BESS, and wind farms. The system dynamics are unknown, and the system Jacobian is extracted by online modeling with a simple multilayer perceptron neural network (MLP-NN). The designed LFC is evaluated through simulating on 10-machine New England 39-bus test system (NETS-39b) in four scenarios. Simulation results verifies the desired performance, indicating its superiority compared to a classical PI controllers, and type-1 fuzzy logic controllers (FLCs). The mean of improvement percentage is about 20%.
Photolon Nanoporous Photoactive Material with Antibacterial Activity and Label-Free Noncontact Method for Free Radical Detection

The worldwide increase in bacterial resistance and healthcare-associated bacterial infections pose a serious threat to human health. The antimicrobial photodynamic method reveals the opportunity for a new therapeutic approach that is based on the limited delivery of photosensitizer from the material surface. Nanoporous inorganic–organic composites were obtained by entrapment of photosensitizer Photolon in polysiloxanes that was prepared by the sol–gel method. The material was characterized by its porosity, optical properties (fluorescence and absorbance), and laser-induced antimicrobial activity against Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. The permanent encapsulation of Photolon in the silica coating and the antimicrobial efficiency was confirmed by confocal microscope and digital holotomography. The generation of free radicals from nanoporous surfaces was proved by scanning Kelvin probe microscopy. For the first time, it was confirmed that Kelvin probe microscopy can be a label-free, noncontact alternative to other conventional methods based on fluorescence or chemiluminescence probes, etc. It was confirmed that the proposed photoactive coating enables the antibacterial photodynamic effect based on free radicals released from the surface of the coating. The highest bactericidal efficiency of the proposed coating was 87.16%. This coating can selectively limit the multiplication of bacterial cells, while protecting the environment and reducing the risk of surface contamination.
Mice with Type 2 Diabetes Present Significant Alterations in Their Tissue Biomechanical Properties and Histological Features

Type 2 diabetes mellitus (T2DM) is a complex metabolic disease often associated with severe complications that may result in patient morbidity or death. One T2DM etiological agent is chronic hyperglycemia, a condition that induces damaging biological processes, including impactful extracellular matrix (ECM) modifications, such as matrix components accumulation. The latter alters ECM stiffness, triggering fibrosis, inflammation, and pathological angiogenesis. Hence, studying ECM biochemistry and biomechanics in the context of T2DM, or obesity, is highly relevant. With this in mind, we examined both native and decellularized tissues of obese B6.Cg-Lepob/J (ob/ob) and diabetic BKS.Cg-Dock7m+/+LeprdbJ (db/db) mice models, and extensively investigated their histological and biomechanical properties. The tissues analyzed herein were those strongly affected by diabetes—skin, kidney, adipose tissue, liver, and heart. The referred organs and tissues were collected from 8-week-old animals and submitted to classical histological staining, immunofluorescence, scanning electron microscopy, rheology, and atomic force microscopy. Altogether, this systematic characterization has identified significant differences in the architecture of both ob/ob and db/db tissues, namely db/db skin presents loose epidermis and altered dermis structure, the kidneys have clear glomerulopathy traits, and the liver exhibits severe steatosis. The distribution of ECM proteins also pinpoints important differences, such as laminin accumulation in db/db kidneys and decreased hyaluronic acid in hepatocyte cytoplasm in both obese and diabetic mice. In addition, we gathered a significant set of data showing that ECM features are maintained after decellularization, making these matrices excellent biomimetic scaffolds for 3D in vitro approaches. Importantly, mechanical studies revealed striking differences between tissue ECM stiffness of control (C57BL/6J), obese, and diabetic mice. Notably, we have unveiled that the intraperitoneal adipose tissue of diabetic animals is significantly stiffer (G* ≈ 10,000 Pa) than that of ob/ob or C57BL/6J mice (G* ≈ 3000–5000 Pa). Importantly, this study demonstrates that diabetes and obesity selectively potentiate severe histological and biomechanical alterations in different matrices that may impact vital processes, such as angiogenesis, wound healing, and inflammation.
Predictors of Antenatal Depression in Pregnant Couples

Pregnant women and their partners are at an increased risk of antenatal depression. Therefore, this cross-sectional study of data from 116 couples investigated predictors of maternal and paternal antenatal depression using sociodemographic data, women’s risk factors for depression during the antenatal period, women’s perceived stress, and antenatal depression in the other partner. Pregnant women had higher depression scores (7.4 ± 4.7) and a higher frequency of being at high risk for depression (25.9%) than their spouses (4.6 ± 3.5, 9.5%). Multiple linear regression analysis revealed that the statistically significant predictors of antenatal depression in pregnant women were perceived stress (β = .45, p < .001) and antenatal depression risk factors (β = .30, p = .002) and in spouses, women’s antenatal depression risk factors (β = .29, p = .013). The present findings suggest that nurses should intervene to mitigate the risk of maternal antenatal depression and perceived stress to prevent depression in pregnant couples.
Exploration of the Relationships between Hazard Perception and Eye Movement for Young Drivers

Aiming at young drivers’ hazard perception (HP) and eye movement, a cross-sectional study was conducted in the city of Xi’an, China. 46 participants were recruited, and 35 traffic scenes were used to test drivers’ hazard perception and eye movement. The difference analysis and correlation analysis were carried out for the acquired data. The results suggest that some indices of hazard perception and eye movement are significantly correlated. A higher saccade speed is in the direction of higher hazardous scenes. Higher complex scenes result in smaller saccade angle. The number of hazards unidentified is negatively influenced by complexity degree and hazardous degree of traffic scenes, and similar associations are found between hazard identification time, complexity degree, and hazardous degree. The hazard identification time and the number of hazards slowly identified are positively affected by the number of fixations and the number of saccades. Meanwhile, differences in the hazardous degree evaluation, hazard identification time, number of hazards unidentified, number of fixations, and number of saccades are found in different types of traffic scenes. The results help us to improve the design of road and vehicle devices, as well as the assessment and enhancement of young drivers’ hazard perception skills.
Assessing Users’ Perception on the Current and Potential Educational Value of an Electrical Engineering YouTube Channel

Full comprehension of abstract concepts present in engineering education has been usually considered challenging. Engaging multimedia resources have proven to be useful pedagogical aids to increase students’ motivation. In fact, already existing dissemination videos might be suitable to fulfill this objective. This research aims to contribute assessing video implications in the enhancement of engineering education quality through the evaluation of the current pedagogical use of a specific electrical engineering YouTube channel. To meet this objective, we characterize the use of such channel through a quantitative methodology based on a 5-point Likert scale survey (Cronbach’s alpha = 0.76). Sample data were collected from 912 respondents, evaluating users’ perception on the channel’s content and format adequacy, their preferences, and their perceptions on video integration in educational contexts. Results show (3.98 over 5) that there is currently a far-reaching educational use of the channel, and a general perception that its contents and audiovisual format are adequate for such purpose. Most users agree (4.74 over 5) that this kind of pedagogical resource could enhance education quality. As limitations, an underrepresentation of teachers in the sample could be highlighted, though student community is well represented. Overall findings suggest that the format and cognitive load in scientific dissemination YouTube channels might be perceived as suitable for pedagogical use, as means to improve education experience. This complementary use unveils the need to implement technology integration models to facilitate their pedagogical insertion, which will be addressed as future works along with more evaluations of similar dissemination channels.
Lumped parameter models for single- and multiple-layer inductors

A method for modeling inductors under high-frequency operation is presented. The method is based on analytical approaches which can predict turn inductances, turn-to-turn and turn-to-core capacitances using physical structure of windings. Turn inductances, turn-to-turn and turn-to-core capacitances of coils are then introduced into suitable lumped parameter equivalent circuits of inductors. The overall inductance and stray capacitance can be obtained through the use of the equivalent circuits. Both single- and multiple-layer inductors are considered. The method was tested with experimental measurements. The accuracy of the results was good in most cases. The derived expressions can be useful for the design of HF inductors and can also be used for simulation purposes.
Methods for commissioning and identification in drives

Purpose – The purpose of this paper is to summarize several identification methods for the automatic commissioning of electrical drives that are presented in different earlier papers of the same authors. This paper is intended as a contribution to the development of expert systems, taking into account parametric models of the mechanical and electrical subsystem as well as the corresponding parameter fitting.Design/methodology/approach – Some system parameters, which are mandatory for the commissioning of electrical and mechanical systems are often not known. For their identification, a method based on the frequency response calculation utilizing the Welch method is now presented. The main focus of the work is directed to the measurement of the frequency response by exciting the system with pseudo‐random binary signals and to the subsequent procedure for the calculation of the corresponding parameter by utilizing the Levenberg‐Marquardt algorithm.Findings – The presented identification procedure leads to o.
Danger of flashovers to electric equipment located on roofs of buildings struck by lightning

Threats of flashovers to electrical equipment located on roofs of buildings struck by lightning and application of different methods for estimation of separation distances for protection of this equipment are analyzed and compared. Large, few-storey buildings with different external LPS (Lightning Protection Systems) are taken into considerations. The analyses are based on the results of numerical calculations, confronted with the results of approximate procedures proposed in the European and international standards on lightning protection EN/IEC 62305-3. Streszczenie. Analizowane są zagrozenia przeskokami iskrowymi do urządzen i instalacji elektrycznych na dachach obiektow budowlanych trafionych przez wyladowania piorunowe oraz rozne metody szacowania odstepow izolacyjnych w celu ochrony tych urządzen. Analizy bazują na wynikach obliczen numerycznych oraz zaleceniach europejskich i miedzynarodowych normach ochrony odgromowej EN/IEC 62305-3. (Zagrozenie przeskokami iskrowymi do urządzen elektrycznych zlokalizowanych na dachach budynkow trafionych przez wyladowania piorunowe).
Statewide Traffic Safety Study Phase II: Identification of Major Traffic Safety Problem Areas in Louisiana

This report summarizes a study that seeks to identify the factors leading to the high crash rate experienced on Louisiana highways. Factors were identified by comparing statistics from the Louisiana Crash Database with those from peer states using the Fatality Analysis Reporting System (FARS) database and to the nation as a whole using the General Estimates System (GES) database. Peer states for Louisiana are Alabama, Arkansas, Colorado, Kentucky, Mississippi, Oklahoma, and Tennessee. A list of 23 problem areas were identified and were then further investigated to try and identify root causes. The root causes were suggested as including high alcohol-impaired driving, high crash rates among young drivers, low seatbelt usage, an elevated use of improper driver licenses, speeding, and inadequate adherence to traffic control. Countermeasures were identified to address some of the main problem areas and prioritized on their cost, need, and performance.
Determination of parameters of symmetric coupled lines in an inhomogeneous medium using reflected and transmitted waveforms

A simple new method to determine unknown coupled line parameters (the even- and odd-mode characteristic impedances Z/sub e/ and Z/sub o/ and phase velocities V/sub e/ and V/sub o/) is presented. The Z/sub e/ and Z/sub o/ can be determined by the amplitudes of the first reflected and transmitted waveforms and the V/sub e/ and V/sub o/ by the delay times of the second reflected and transmitted waveforms. Either V/sub e/ V/sub o/ can be distinguished easily.
Theorising work–life balance endeavours as a gendered project of the self: The case of senior executives in Denmark

Recent work–life balance (WLB) studies offer considerable insight into the challenges and strategies of achieving WLB for senior managers. This study shifts the focus from asking how to asking why individuals are so invested in pursuing a particular kind of WLB. Through analysing 62 life history interviews with male and female senior executives in Denmark, we develop the concept of the gendered project of the self to theorise WLB. We show how for the executives, WLB was not simply an instrumental process of time or role management; instead, pursuing WLB in a certain way was a key part of acquiring and maintaining a particular desired subjectivity or a sense of self as a better person, better worker and better parent. We argue that theorising WLB as the gendered project of the self allows us to explicate the mechanisms through which gendered social and cultural expectations translate into how male and female executives can and want to pursue their WLB goals – first by driving one’s desire for WLB and, second, by shaping and restricting what is desired. In doing so, we highlight the importance of scrutinising the role of broader WLB discourses in shaping the experience and uptake of organisational WLB policies.