Miracle-dz/UniFAR-FTUs huggingface dataset:
Binary controlled single phase PFC rectifier

A novel control strategy by means of binary combination for single phase rectifier circuit is proposed. The sinusoidal AC line current waveform with 31 levels only by using 4 switching devices can be obtained without using any filter circuits, whereas the conventional bridge converter composed of the same number of devices has 3 levels with rich switching harmonics. The features of the proposed rectifier are the low electromagnetic interferences and the low switching loss because the handling power of the LSB switching device for high switching operation is very small. In this paper, we describe the circuit configuration, the principle of control method and the relation between the number of levels and switching devices as compared with the conventional multiple connected rectifier circuit. After that, we show the control system for the proposed converter circuit. Then, we verify the feasibility of the binary converter from some simulation and experimental results.
A stator flux oriented induction machine drive

The sensitivity of the parameters of a rotor-flux-oriented system using rotor flux estimation is discussed, and a stator-flux-oriented scheme is developed. Since the estimation of the stator flux is independent of the leakage, the steady-state performance of the stator-flux-oriented system is insensitive to the leakage inductance. A decoupler is designed to minimize the coupling in the stator-flux reference frame, improving the dynamic performance of the system. Digital simulation is carried out to show that the performance of the stator-flux-oriented system is superior to that of a detuned rotor-flux-oriented system. <<ETX>>
Evaluating the Cost of Failure Risk: A Case Study of the Kang-Wei-Kou Stream Diversion Project

For water resource engineering projects, some potential risks that are unclear and difficult to investigate are the most crucial problem for engineers. This study presents a unique case of unknown risks, the Kang-Wei-Kou (KWK) Diversion project, which collapsed due to an unexpected hydraulic jump resulting from uneven regional rainfall. We used HEC-RAS incorporating Monte Carlo simulations for analyzing the potential risks to the original design of the KWK Diversion, concerning boundary conditions. An extreme value type I distribution was selected as the form of probability density function (PDF) to upstream discharge, whereas a normal distribution was selected as the form of PDF to downstream water depth, as boundary conditions. Applying the Monte Carlo method, the analysis revealed that the probability of failure was 7.5%, which was non-negligible and should have been considered in the design plan. This case study indicates that overlooking downstream conditions can lead a major facility to fail, and a stochastic analysis could be a way to find out potential risks. We also applied the cost–benefit analysis to review whether the design plans were appropriately estimated with careful risk based consideration.
Development of Dual Activities with Micro:Bit for Interventions in People with Cerebral Palsy

Several studies have shown that video games help to motivate users in different kinds of therapies. Therefore, in this work we developed a tool that includes dual activities for therapy, as well as a data system for the specialist to follow the evolution of the user. The aim of dual activities is to train cognitive and aerobic capacities at the same time. The interaction between the user and the game is made through two Micro:Bits. Once the user finishes the game, the therapist can follow the evolution of the user through some parameters included in the activities.
Stator Winding Second-Order Thermal Model including End-Winding Thermal Effects

This paper proposes a second-order thermal model for electrical machines. The goal of this model is the prediction of the average winding temperature during short and long thermal transients up to the steady-state conditions. First, the thermal parameters of the electrical machine are determined by a DC test. Then, the proposed model is characterized and validated using AC tests. The accuracy of the proposed thermal model has been verified comparing the computed temperatures with the measured ones. The maximum error found during the thermal transient is lower than 3%, an excellent result comparing the complexity of a total enclosed fan cooled induction motor and the simplicity of the proposed model.
Analysis of Urban Environment: Case Study of the Spatial Integration of Rwandan Cities

This paper presents the results of the study undertaken in Rwanda to investigate the spatial integration of cities. It was revealed that the economic subordination degree appears to be very low because the economy of all cities in country depends on Kigali City, the capital of Rwanda that detains more than 70% of national economy.
ROUTER DESIGNFOR APPLICATIONSPECIFICNETWORKS-ON-CHIPON RECONFIGURABLESYSTEMS

A fundamental objective inthedesign ofanetwork-on-chip istominimize itsareaandpowerconsumption while keeping theperformance requirements atacceptable levels. Thetrade-offs involved intheprocess depend onthetarget technology, ASICorFPGA.Thispaper presents anovel design approach tocustomize therouters inanetwork-onchipforreconfigurable systems. Morespecifically, given a topology andthetraffic requirements, thedesign process automatically finds thearchitecture ofeachrouter, adjusting thesize ofthebuffers andtheconfiguration oftheswitch matrix, suchthattheoverall areaandperformance are maximized. Theresults indicate that theproposed algorithm canprovide significantly better solutions compared tothe uniform router design, whichistypically used.
PD Diagnosis on 22.9kV XLPE Underground Cable using Ultra-wideband Sensor

This paper presents compact low frequency ultra-wide band (UWB) sensor design and study of the partial discharge diagnosis by sensing electromagnetic pulse emitted from the partial discharge source with the newly designed UWB sensor. In this study, we designed a new type of compact low frequency UWB sensor based on microstrip antenna technology to detect both the low frequency and high frequency band of the partial discharge signal. Experiments of offline PD testing on medium voltage (22.9㎸) underground cable mention the comparative results with the traditional HFCT as a reference sensor in the laboratory. In the series of comparative tests, the calibration signal injection test provided with the conventional IEC 60270 method and high voltage injection testing are included.
Justification of TQM–TPM implementations in manufacturing organisations using analytical hierarchy process: a decision-making approach under uncertainty

Research on quality had always been the key problem in study on enterprise management. As the product quality always depends upon the organisation’s infrastructural adequacies and abilities of the organisation and how well they manage their equipment and facilities. The quality requirements all over the world had forced industries to use tools such as total quality management (TQM) and total productive maintenance (TPM), effectively to get higher achievements in business performance. This empirical research evaluates the combined TQM–TPM strategic factors to determine the critical success factors in environmental uncertainty using analytical hierarchy process. The study decision criteria include TQM, TPM and transfusion of TQM–TPM, whereas the competitive advantages taken are strategic business performance, quality, production, cost, employee safety and morale. The research findings are applicable to manufacturing organisations, suggesting them the adoption of flexibility of TQM–TPM as a major competitive.
W-band MMIC VCO with a large tuning range using a pseudomorphic HFET

A widely tunable oscillator with a center frequency of 94 GHz including a two stage buffer amplifier has been designed and fabricated, The output power was 6 mW. The mechanical tuning range by removing air-bridges was 18 GHz. The electrical tuning range was 8 GHz. The noise performance was better than -67 dBc/Hz at 1 MHz from the carrier.
Análise de microincidentes na operação de usinas nucleares: estudo de caso sobre o uso de procedimentos em organizações que lidam com tecnologias perigosas

Organizations that work with hazardous materials, such as nuclear power plants, offshore installations, and chemical and petrochemical plants, have risk management systems involving accident control and mitigation to ensure the safety of their facilities. These systems are based on physical devices, such as protective barriers, equipment and systems aimed at preventing the occurrence and propagation of accidents, and on human aspects such as regulations and procedures. This paper analyzes the use of a variety of procedures by nuclear power plant control room operators. The methodology consisted of analyzing the work of control room operators during the normal operations, shutdown, and startup of a nuclear power plant, and in full scale simulator training. This survey revealed that routine noncompliance to procedures was considered normal according to the operating rationale, which is based on technical, organizational and cultural factors. These findings indicate that the competencies nuclear power plant operators must possess far exceed proper technical training and the ability to follow written instructions.
Scale-Space Methods for Image Feature Modeling in Vision Metrology

vision-based measurement system applicable for use in two-dimensional (20) industrial inspection is described. The system embodies a five-stage approach to feature modeling comprising the use of multi-scale functions for filtering and feature location, image structure representation through a fusing of filter responses, extraction of edge information, edge building, and a determination of geometric feature at- tributes. The purpose of feature modeling is to describe and represent feature geometry and dimensions. In an inspection context, information on conformance to design can be pro- vided by using this approach. The application of the system to the tasks of on-line steel plate and wheel rim inspection are described and, following an explanation of the use of scale-space methods for feature modeling, results of experi- I mental tests are summarized.
DEVELOPMENT OF HIGH PRECISION PNEUMATIC-PIEZOELECTRIC HYBRID POSITIONING SYSTEM

Servo pneumatic positioning control systems have the advantages of high response, easy maintenances and cleanliness, but the positioning accuracy is restricted by systems' non-linearity, such as friction force. In this study, a high precision pneumatic-piezoelectrical hybrid positioning control system is developed. Such a system contains a servo-pneumatic cylinder and a piezoelectric actuator. The servo pneumatic cylinder serves to coarse positioning with high speed and large stroke, and the piezoelectric actuator positions in fine stroke to compensate the influence of non-linearity to achieve large stroke, high response and high positioning accuracy. The overall control system becomes a complex dual-input single-output (DISO) control system. The test results show that the positioning accuracy for the large stroke of 180 mm can achieve 1μm.
REAL TIME VEHICLE COUNTRY OF ORIGIN CLASSIFICATION BASED ON COMPUTER VISION

In order to efficiently monitor and control road traffic, relevant traffic parameters values are needed in real time. Traffic parameters include traffic flow speed profile, vehicle type classification, vehicle gap, vehicle length, origin-destination matrix, etc. Using these parameters advanced traffic control approaches from the domain of intelligent transportation systems (ITS) can be applied. Additionally, traffic planners can incorporate more accurate traffic forecasts when planning new roads. Also ITS related services can be provided to users, especially precise real time traffic information. Surveillance video cameras combined with advanced computer vision (CV) algorithms are nowadays becoming a tool used more frequently to obtain mentioned traffic parameters. They are used as standalone sensors or in combination with other sensors like radars, inductive loops, etc. In this article architecture of a computer vision based road traffic surveillance system is proposed. Application of such a system for vehicle counting and vehicle country of origin classification using license plate recognition is described. Implemented system is tested using real world road traffic video footage from a Croatian highway near the city of Zagreb. Proposed system quality is analysed using vehicle detection processing time and accuracy.
Enhancing Transit Circulation in Resort Areas: Operational and Design Strategies

Many resort areas and other major activity centers are facing transportation challenges as rising traffic congestion erodes the quality of a visitor’s experience. Many resort areas have turned to public transportation as an alternative strategy for visitor circulation, but these services often become enmeshed in the same traffic jam that they were intended to circumvent. The city of Virginia Beach, Virginia, undertook an aggressive, long-term effort to establish and enhance an effective transit circulation in its beachfront resort area through a combination of physical design improvements and operational management. The development and implementation of the combination strategy are described, and lessons learned that are relevant to other resort-area transit-circulator services are outlined.
Designing technology for and with special populations : and exploration of participatory design with people with aphasia

Computer technology has become ubiquitous in today’s society and many daily activities depend on the ability to use and interact with computer systems. Most computer technology, however, is currently designed for the “average” user, and thus ignores substantial segments of the population excluding them from many common activities. The goal of our research is to address, in part, the problem of designing inclusive technology, focusing on the design of technology for users with aphasia. Aphasia is a cognitive disorder that impairs language abilities, including some or all of speaking, listening, reading, and writing. It results from damage to the brain and most commonly occurs after a stroke, brain tumor, or head trauma. From interviews with aphasic individuals, their caregivers, and speech-language pathologists, several needs were identified that could be met with new application software. Among those needs was a daily planner application that would allow aphasic users to independently manage their appointments using a Personal Digital Assistant (PDA). This research was conducted in two phases: (1) a participatory design phase in which ESI Planner (the Enhanced with Sound and Images Planner) was iteratively developed with input from aphasic participants, and (2) an evaluation phase where a lab study was performed to assess the effectiveness of the resulting tri-modal design, which incorporates triplets of images, sound, and text to represent appointment data. This methodology was used to achieve both usable and adoptable technology. An additional goal in performing this research was to identify where traditional user-centered design methodology and experimental evaluation are inadequate for our target population. Several guidelines have emerged from our work, which are likely to be relevant to others engaging in research with special populations.
Very Wideband, Compact Microstrip Bandstop Filter Covering S-Band to Ku-Band

This paper reports a wide bandwidth planar bandstop filter with improved RF characteristics. The proposed filter on alumina is realized incorporating tapped open stub along with spurline topology. Further, stepped impedance resonator (SIR) approach has been introduced in the tapped stubs to achieve wider band performance with improved selectivity. The proposed topology effectively controls the transmission poles. Fabrication of this BSF has been carried out on glass substrate showing minimal effect of permittivity variation on bandwidth performance. This validates the applied approach with achievable bandwidth of more than 100% ranging from S- to Ku-band. Close agreement with simulation and practical results have been demonstrated with measured insertion loss of less than 1 dB and attenuation loss better than 30 dB at C-band.
A modified control scheme to alleviate DC voltage stress in active clamp PFC AC/DC converter with universal input

A modified control scheme is proposed to alleviate bulk capacitor voltage stress in active clamp bi-flyback power factor correction (PFC) AC/DC converter with universal input. In the proposed control scheme, the auxiliary switch is turned on with a fixed narrow pulse-width, rather than the conventional complimentary signal of the main switch. As a result, the proposed technique will substantially suppress the DC voltage well below 400 V under the entire input range. The improved performance was experimentally verified through a 28 V, 5.35 A prototype.
A condition for global convergence of a class of symmetric neural circuits

A sufficient condition is proved guaranteeing that a class of neural circuits that includes the Hopfield model as a special case is globally convergent towards a unique stable equilibrium. The condition only requires symmetry and negative semi-definiteness of the neuron connection matrix T and is extremely simple to check and apply in practice. The consequences of the above result are discussed in the context of neural circuits for optimization of quadratic cost functions. >
UN ENFOQUE BAYESIANO PARA INCORPORAR PRONÓSTICOS DE LA DEMANDA EN EXPERIMENTOS POR SIMULACIÓN PARA LA ADMINISTRACIÓN DE INVENTARIOS

In o rder to po stpone production p lanning ba sed on information ob tained closer to the time of sale, decision support systems for inventory management often include demand forecasts based on little historical data and /or s ubjective information. Particularly, when simulation models for analyzing d ecisions r elated to safety inventories, lot sizing o r lead times are used, it i s convenient t o model demand considering h istorical data, as well as information (often subjective) of the near future. This article presents an approach for modeling a random input component (e.g., demand) in simulation experiments for inventory management. Under this approach, the family of distributions proposed for modeling the random component include two types of parameters: the ones that capture information of historical data and the ones that depend on forecasts (often subjective) from the particular s cenario that i s to b e simulated. The application o f t he proposed app roach is illustrated with an example which models daily demand through a n egative binomial distribution, where the system user provides the expected demand for the period that is to be simulated.
Evolutionary Psychology, Rape, and the Naturalistic Fallacy

【 Abstract 】 Feminist critics of evolutionary psychology are often accused of committing the naturalistic fallacy, that is, of inferring certain normative conclusions from evolutionary psychology’s purely descriptive accounts. This article refutes the accusation of the naturalistic fallacy, by showing that evolutionary psychology’s accounts of human behavior are not purely descriptive, but rather grounded on biased value judgments. A paradigmatic example is Randy Thornhill and Craig Palmer’s well-known book A Natural History of Rape . I argue that at least three biased judgments are at work in Thornhill and Palmer’s evolutionary psychology account of rape: (1) adaptationist approaches to evolution, (2) willful ignorance of cultural and social context, and (3) binary understanding of gender and sex. In that Thornhill and Palmer’s account cannot hold without the three biased value judgments, it is not a purely factual description of rape. Therefore, feminist concerns over its normative implications do not commit the naturalistic fallacy, as it is not the case that they infer a normative conclusion from a pure description.
Tracking Anthropomorphizing Behavior in Human-Robot Interaction

Existing methodologies to describe anthropomorphism in human-robot interaction often rely either on specific one-time responses to robot behavior, such as keeping the robot's secret, or on post hoc measures, such as questionnaires. Currently, there is no method to describe the dynamics of people's behavior over the course of an interaction and in response to robot behavior. In this paper, I propose a method that allows the researcher to trace anthropomorphizing and non-anthropomorphizing responses to robots dynamically moment-by-moment over the course of human-robot interactions. I illustrate this methodology in a case study and find considerable variation between participants, but also considerable intrapersonal variation in the ways the robot is anthropomorphized. That is, people may respond to the robot as if it was another human in one moment and to its machine-like properties in the next. These findings may influence explanatory models of anthropomorphism.
Legged locomotion: Balance, control and tools — from equation to action

This thesis is about control and balance stability of leggedlocomotion. It also presents a combination of tools that makesit easier to design controllers for large and complicated robotsystems. The thesis is divided into four parts.The first part studies and analyzes how walking machines arecontrolled, examining the literature of over twenty machinesbriefly, and six machines in detail. The goal is to understandhow the controllers work on a level below task and pathplanning, but above actuator control. Analysis and comparisonis done in terms of: i) generation of trunk motion; ii)maintaining balance; iii) generation of leg sequence andsupport patterns; and iv) reflexes.The next part describes WARP1, a four-legged walking robotplatform that has been builtwith the long term goal of walkingin rough terrain. First its modular structure (mechanics,electronics and control) is described, followed by someexperiments demonstrating basic performance. Finally themathematical modeling of the robots rigid body model isdescribed. This model is derived symbolically and is general,i.e. not restricted to WARP1. It is easily modified in case ofa different number of legs or joints.During the work with WARP1, tools for model derivation,control design and control implementation have been combined,interfaced and augmented in order to better support design andanalysis. These tools and methods are described in the thirdpart. The tools used to be difficult to combine, especially fora large and complicated system with many signals and parameterssuch as WARP1. Now, models derived symbolically in one tool areeasy to use in another tool for control design, simulation andfinally implementation, as well as for visualization andevaluationthus going from equation to action.In the last part we go back toequationwherethese tools aid the study of balance stability when complianceis considered. It is shown that a legged robot in astatically balancedstance may actually beunstable. Furthermore, a criterion is derived that shows when aradially symmetricstatically balancedstance on acompliant surface is stable. Similar analyses are performed fortwo controllers of legged robots, where it is the controllerthat cause the compliance.Keywordslegged locomotion, control, balance, leggedmachines, legged robots, walking robots, walking machines,compliance, platform stability, symbolic modeling