Miracle-dz/UniFAR-FTUs huggingface dataset:
Occultation Judgment for the Hemispherical Coverage Multi-Planar Arrays Antenna

A flexible hemispherical coverage array antenna based on multi-planar arrays is proposed to meet the growing demands for multi-target TT&C. The advantages and disadvantages of multi-planar arrays and dome phased in engineering implement are compared. Meanwhile, the influence of different number of plane arrays on antenna pattern is analyzed. For the purpose of interference suppression a novel beamforming method by adding constraint conditions is analyzed to enhance the performance of antenna for TT&C system. Considering the influence of occultation effect on the antenna performance, an effective occultation algorithm is presented. Firstly, the faces in bright area are projected on the plane that is perpendicular with the direction of receiving wave. Secondly, adopting the principle of line segment intersection, the intersect relationship of projective planes is determined. Finally, the facets shadowing relationship is judged by the overlapping and depth-of-view of facets along the receiving wave direction. Theoretical analyses and simulation results show that the antenna has approximate uniform gain beampattern in different steered angle and the occultation algorithm is feasible and effective.
Initial Characterization Of A New 64 X 64 Multiplexed InSb FPA

Preliminary evaluation of the performance characteristics of a new two-dimensional multiplexed MWIR focal plane array assembly is discussed. The CMOS BDRO multiplexer individually buffers each detector in the 64 x 64 element array. This multiplexer was designed with an emphasis on low-background applications and results will be reported accordingly. The detector is an array of photovoltaic indium antimonide (InSb) diodes bump bonded, using indium columns, to the silicon multiplexer and is thinned for back-side illumination. The detector element size is 87 x 87 microns on 100 micron centers. Charge storage capacity is approximately 4 x 106 electrons. The InSb array substrate is thinned to approximately 15 microns and spectrally responsive in the 1 to 5.5 μm region. Electro-optical test results include the performance parameters: quantum efficiency, signal linearity, and dark current. IR images will be presented to illustrate initial array performance.
Radial Vibration Characteristics of Composite Pipe Power Piezoelectric Ultrasonic Transducer

Based on the longitudinal composite piezoelectric ultrasonic transducer,the radial vibration characteristics of composite pipe power ultrasonic transducer with pre-stressed metal pipe shell are studied.The radial composite pipe ultrasonic transducer consists of a short piezoelectric ceramic pipe and a short metal pre-stressed pipe shell.Based on the electromechanical analogy,the equivalent circuit of the radial composite transducer is set up and the resonance frequency equation is derived.The relationships among the resonance frequency,the anti-resonance frequency,the effective electromechanical coupling coefficient and the radius ratio of pre-stressed pipe are analyzed and discussed.By testing the resonance and anti-resonance frequencies of four samples of radial composite pipe piezoelectric ultrasonic transducer,it is shown that the theoretical resonance frequencies agree well with the measured results and the errors are less than 5%.
Association between Male Involvement in Birth Preparedness and Complication Readiness and women’s use of institutional delivery in West Arsi Zone South Ethiopia: Cross-sectional study

Background: In sub-Saharan Africa (SSA), pregnancy and childbirth continue to be viewed as solely a woman’s issues. Increasing partner participation and encouraging joint decision making in maternal health care may provide an important strategy in reducing maternal mortality and morbidity.Objective: To assess the level of male partner involvement in Birth Preparedness and Complication Readiness (BPCR) and its association with women’s use of institutional delivery among mothers who had a child less than 12 months in West Arsi Zone, South Ethiopia Methods: Institutional based cross-sectional study was conducted in West Arsi Zone South Ethiopia in 2019. Systematic random sampling technique was used to select the study subjects. Data was collected using interviewer administered structured questionnaire. Binary and multivariable logistic regression was applied for the analysis of each of the independent variables against the dependent variable. The association between male involvement in BPCR and women’s use of institutional delivery was done. The results were reported using crude and adjusted odds ratio (OR) with their 95% confidence interval. Results: More than half of male partners, 407 (54.3%) accompanied their wife during ANC follow up at least ones for the last pregnancy. Slightly more than three fourth, 571 (76.1%) of male partners involved in BPCR for the last pregnancy. Fife hundred fifty-four (73.9%) of the mothers gave birth in the health institution for the most recent child. Male involvement in BPCR (aOR = 18.7, 95% CI (11.1 – 31.6), joint decision making about place of delivery (aOR = 3.2, 95% CI: 1.76 – 5.7), urban residence (aOR = 2.2, 95% CI: 1.32 – 3.7) and having two or less under-five children (aOR, 95% CI: 2.7 (1.4 – 5.3) were associated with women’s use of institutional delivery. Conclusion: More than three fourth of male partners involved BPCR. Male involvement in BPCR, joint decision making about place of delivery, urban residence and having ≤ 2 under-five children were associated with women’s use of institutional delivery. Designing and implementing health education on the role of male partner in maternal health care is mandatory. Empowering rural mothers to use health institutions for delivery and birth spacing may improve the magnitude of institutional delivery.
Cognitive Task Analysis of Expertise in Air Traffic Control

A cognitive task analysis was performed to analyze knowledge structures, mental models, skills, and strategies of en route controllers to provide an understanding of the key cognitive components of the air traffic controller's job. This article presents the results of three procedures as they contributed to an understanding of controller expertise: paper problem solving, performance modeling, and structured problem solving. The procedures resulted in the identification of (a) 13 primary tasks, (b) a mental model representing expert controller's organization of domain knowledge, (c) three categories of controller strategies, and (d) a hierarchy of goals. These results are being used to specify the instructional content and sequencing for the new Federal Aviation Administration en route air traffic control curriculum.
Analysis of a Two-Body Floating Wave Energy Converter With Particular Focus on the Effects of Power Take-Off and Mooring Systems on Energy Capture

The present paper summarizes analyses of a two-body floating wave energy converter (WEC) to determine the mooring tension and the effect of the mooring system on energy capture. Also, the effect of the power take-off (PTO) is assessed. An axisymmetric Wavebob-type WEC is chosen as the object of investigation. However, the PTO system is modeled in a simplified manner as ideal linear damping and spring terms that couple the motions of the two bodies. The analysis is performed using SIMO, which is a time domain simulation tool that accommodates the simulation of multibody systems with hydrodynamic interactions. In SIMO, docking cone features between the two bodies allow movement as per actual operation, and fenders are applied to represent end stops. Six alternative mooring configurations are applied to investigate the effect of mooring on power capture. Mooring analysis is performed to determine the necessary capacity of mooring lines for each configuration to carry the tension due to the WEC motion in extreme conditions. Hydrodynamic loads are determined using WAMIT. We assumed that the WEC will be operated to capture wave power at the Yeu site in France. The analysis is performed for several regular and irregular wave conditions according to wave data available for that site. Simulations are performed to study the effect of the PTO system, end stops settings and several mooring configurations on power capture.
Performance Characterization of Hot In-Place Recycled Asphalt Mixtures

AbstractDespite the widespread use of in-place recycling, limited information is available in the literature on in situ and laboratory properties of materials placed through in-place recycling. The main objectives of present study were to investigate the in situ recycled material characteristic that includes the potential of asphalt mixtures for permanent deformation, fatigue cracking, and low-temperature cracking, and the effect of a special technique of hot in-place recycling and rejuvenation on asphalt binder rheological properties. To accomplish these objectives, a two-phase experimental program was designed to determine the performance-related parameters of 100% in-place recycled mixtures using one of the in-place recycling techniques in which overlay is not needed. The experimental program included the measurement of mixtures’ mechanical properties and binder rheological properties. The present study revealed that the stiffness of the asphalt mixtures after recycling had increased compared to that b.
Triple‐band CPW‐fed monopole antenna with three branch strips for WLAN/WiMAX triple‐band application

In this article, a novel coplanar waveguide (CPW)‐fed monopole antenna with three branch strips for wireless local area network (WLAN)/worldwide interoperability of microwave access (WiMAX) triple‐band applications is proposed. The proposed antenna is simply composed of three branch strips. By carefully selecting the positions and lengths of these branch strips, the desired resonant modes excited at 2.46/3.6/5.4 GHz with less than −10 dB frequency responses to the impedance can be achieved. In addition, an acceptable agreement is obtained between the simulation and the experiment. Also, the compact design of the proposed antenna, which has enough impedance bandwidth, makes the antenna suitable for WLAN and WiMAX operations. This article further presents and discusses the 2D radiation patterns and 2D gains according to the experiment results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:161–166, 2015
Test of Word Reading Efficiency, Second Edition

A measure designed to provide professionals in schools and clinics with a reliable and valid measure of fluency and accuracy of print-based word-reading skills. It is a nationally normed measure of word reading accuracy and speed, comprised of two subtests: the Sight Word Efficiency (SWE) subtest, a measure of an individual's ability to pronounce printed words, and the Phonemic Decoding Efficiency (PDE) subtest, a measure of an individual's ability to pronounce phonemically regular nonwords. Qeios · Definition, February 2, 2020
Solutions to the harmonic elimination problem in a seven level inverter

Multilevel inverters have recently emerged as very important alternatives in high power applications. Several modulation methods have been applied to multilevel inverters. When utilised at low switching frequencies, existing multilevel carrier-based pulse width modulation (PWM) strategies have no special provisions to render quality output; several lower order harmonics are included in the spectrum. The problem of eliminating selected harmonics in a chosen multilevel inverter is considered in this paper. Given a desired fundamental output voltage, the problem is to find the switching times (angles) that produce the fundamental while not generating specifically chosen harmonics. This paper proposes techniques using simulated annealing (SA), genetic algorithm (GA) and Newton-Raphson method for calculating offline the optimum switching angles of chosen seven-level inverter to eliminate the 5th and 7th harmonics. Solution through SA technique is found to be better. The switching angles provided by the three methods are implemented in a field programmable gate array (FPGA) based firing module for the chosen inverter. The simulation and hardware results are presented and evaluated. They validate the solution developed for the chosen problem.
Simulation Method of Particle Size Scale for Fine Sand Model

In sediment movable bed model, the basic similar conditions include the flow movement similar and the sediment movement similar. In water flow movement similar conditions, the velocity scale of the Freund's similarity and resistance similarity is inconsistency, and the flow resistance is the function of bed material grain size and flow intensity. In sediment movement similar, the particle size scale forms are not consistent too, and they are also related to the flow conditions, so the sediment partial size scale is difficult to determine. According to the research, the similar conditions can be focused on primary and secondary one, and put the primary one as the design basis. In view of the waterway regulation, the regulation flow discharge should be the design basis, others allowed a certain deviation; In the straight reach, resistance similarity should be the design basis, Freund's similarity allowed a certain deviation; In the bend reach, the Freund's similarity and resistance similarity should be simultaneously satisfied; For the bed load model, the incipient motion should meet similarity condition; The suspended sediment model should meet the sediment suspension similarity; For the non-uniform sediment, median particle size should be the design basis. According to the above principles, the sediment particle size scale can be determined.
INVESTIGATION OF THE ESSENTIALS FOR INTEGRATING OFF-THE-SHELF INDUSTRIAL ROBOTICS IN PRECISE COMPUTER-ASSISTED SURGERY

Off-the-shelf industrial robotic technologies have achieved significant advancements in the past several decades in terms of mechanics and automation performances. We are expecting to take advantage of the industrial robots for assisting surgeons in surgeries and quick prototyping a robotic surgery system. In precise computer-assisted surgeries (CASs), such as pelvic-acetabular surgery, eye surgery, or neurosurgery, it is extremely important to position the tools accurately and precisely for surgical operations. Some of the industrial robotics arms are able to achieve good repeatability and dexterity while positioning the surgical tools. To enable the application of industrial robots in the surgical rooms, there are several other essential modules to be integrated to the robotic surgery systems, such as real-time navigation system, surgical planning system, and surgeon-guidance system. In this paper, we review the existing studies on the medical robots including the ones using industrial robots, and then investigate the essentials for using industrial robots in computer-integrated surgery.
Failure Analysis of Desulfurization Slurry Circulating Pump and HVOF Coating Protection Technology Progress

Failure form and erosion-corrosive mechanism of desulfurization slurry circulating pump were analyzed comprehensively, its protection status and HVOF spraying protection technology research were discussed, the technical characteristics and good prospects of HVOF applied in the slurry circulating pump were pointed out in this paper.Keywords: Desulfurization, Slurry circulating pump, Erosion, Corrosion, HVOF
Analysis and Suppression of Voltage Violation and Fluctuation with Distributed Photovoltaic Integration

In recent years, the violation and fluctuation of system voltage has occurred with greater frequency with the integration of high-penetration distributed photovoltaic generation. In this paper, the voltage violation and fluctuation in a high-penetration distributed photovoltaic integrated system is analyzed, and then a corresponding suppression strategy is proposed. Firstly, based on solar cell and photovoltaic control system models, the influence factors of photovoltaic output are analyzed. Secondly, the voltage violation and fluctuation caused by photovoltaic integration is analyzed, and the quadratic parabola relationship between bus voltage fluctuation and photovoltaic power variation is constructed. Next, according to the virtual synchronous generator characteristic of distributed photovoltaics, a double-hierarchical suppression strategy is proposed to make full use of reactive power regulation capability, which can maintain the symmetry of power supply while meeting standard requirements. The proposed strategy can conveniently realize quick response and support the photovoltaic extensive access. Moreover, with the employment of the proposal, the system voltage violation and fluctuation can be suppressed effectively. Finally, considering the photovoltaic access location, capacity, and partial shading, the effectiveness of the proposed strategy is verified in IEEE 33-bus distribution system with field measured data. After distributed photovoltaic accesses the system, more than 60% of buses appear to have undergone bus voltage violation. With the proposed method, more than 20% of the voltage deviation and more than 6% of the voltage fluctuation are effectively suppressed so that the system voltage can be kept below 1.07 p.u. and the voltage fluctuation can be kept within 4%, meeting the requirements of power quality standards.
Reliability Method on Product Innovation Design

Product innovation design is challenging due to the complexity of the industrial environment, the changing needs of markets and customers, the effect of intense social competition, and the unpredictability of the future. This paper presents in a systematic analysis of reliability method on industrial product innovation design in order to illustrate what the real meaning of reliability method and how it works on the product innovation design. It also clarifies the relationship between reliability method and product innovation design, reflecting the function of reliability method on each work stage. It is concluded that a suitable thinking mode should be applied on the corresponding design, and it will enhance the effectiveness of innovative product design in general.
Integrating Six Sigma with ISO 9001

Purpose – By exploiting the relationships between Six Sigma and quality management systems (QMS) based on the ISO 9001 standard, this paper proposes a set of guidelines to combine and integrate both approaches in a systematic way. The guidelines are organised into integration topics, and each one is linked to the clauses of the ISO 9001 standard they refer to.Design/methodology/approach – Based on the literature review, Six Sigma and QMS based on the ISO 9001 standard are thoroughly discussed and compared and beneficial synergies between them are identified. Based on this study, and to take advantage of the compatibilities and logical linkages between both approaches, guidelines for the integration of Six Sigma with the ISO 9001 requirements are developed.Findings – Benefits resulting from the integration of Six Sigma with a QMS based on the ISO 9001 standard are mutual. The integration guidelines proposed in this paper provide a framework to unify process management practices, enhance the effectiveness o.
Comparative small-signal stability analyses of PMSG-, DFIG- and SCIG-based wind farms

The aim of this research is to provide a detailed investigation into the inherent characteristics of squirrel-cage induction generator, doubly fed induction generator and permanent-magnet synchronous generator-based wind turbines using small-signal analyses to see how each turbine technology affects the local, inter-area, torsional and control modes of the system, as well as at increased penetration levels.
Towards product-service systems modelling: a quest for dynamic behaviour and model parameters

The product-service system (PSS) is an emerging manufacturing paradigm embracing the increased value of offering through the integration of products and services as a basis of competitive strategy. The PSS has various characteristics beyond the traditional product-selling businesses as a result of intense customer interactions and increased service levels. These interactions can further trigger the dynamic behaviour of the system and consequently can cause uncertainties across the whole network of manufacturers and customers. The work described in this paper is part of a research project whose overall goal is to provide the manufacturing system designers with better decision making capabilities to effectively shift their manufacturing businesses from product selling to PSS offering. In particular, this paper aims to capture typical characteristics exhibited by manufacturers who have adopted PSS, to better understand their dynamic behaviour, to have appreciation of the existing techniques and tools for modelling PSS, and ultimately to search for PSS model parameters. The main contribution of this paper is the collation of key model parameters that should be considered for an effective PSS modelling. The paper also identifies strengths and weaknesses within the existing PSS modelling work, and highlights the opportunities for future research agenda.
Study on Effects of Ultrasonic Vibration on Grinding Force

The mathematical models of the dynamic grinding force and the average grinding force were established by introducing the unit grinding force Fu. And the formula of the average grinding force in the grinding zone was derived. The experiments were conducted in the traditional grinding (TG) mode and tangential ultrasonic vibration grinding (TUAG) mode. The results show that the unit grinding force in TUAG is lower than that in TG in the same machining condition; the grinding force ratio is decreased due to the tangential ultrasonic vibration of the workpiece. It is helpful to improve the machinablity of the hard-brittle material.
Vibration control of an aircraft nose landing gear due to ground-induced excitation

Abstract The effects of runway unevenness on the design and operation of an aircraft have been subjected to investigations for a number of years. Runway roughness will, in general, produce both longitudinal and lateral excitations. This article examines the lateral stability of linear and non-linear models of an aircraft nose landing gear (NLG) subjected to ground-induced lateral excitation. Simulations of ground profile and ground excitation modelling have been performed and numerical studies were carried out to bring out the effect of runway roughness and its interaction with torsional free play. The results show that a small amount of runway excitation causes a significant reduction in the critical shimmy velocity and, in combination with free play, it has an adverse impact on lateral stability of the NLG of an aircraft. Finally, a study has been performed to postpone the dynamic instability by introducing a magnetorheological (MR) fluid-based damper and enhanced torque arm stiffness.
Recurring themes in value management practice

This paper reports on a survey of 17 value management exercises recently carried out within the UK construction industry. Twelve leading value management practitioners were asked to describe an example of a value management study which ‘worked well’ and one which ‘did not work well’. They were further asked to explain the underlying factors which they considered had influenced the eventual outcome of the value management study. The subsequent analysis of the interview transcripts reveals six recurring themes which were held to have had a significant influence: expectations, implementation, participation, power, time constraint and uncertainty. Whilst caution is necessary in extracting the themes from their individual contexts, they do provide a valuable insight into the factors which influence the outcome of value management studies.