Miracle-dz/UniFAR-FTUs huggingface dataset:
Synthesis and FPGA-based implementation of an indirect sliding mode current controller of a synchronous machine

This paper presents the synthesis and the implementation on a field programmable gate array (FPGA) of an indirect sliding mode current control of a synchronous machine. The adopted sliding mode current control strategy is very advantageous for making the controlled system robust to parameter variations and external disturbances. The main interest of using FPGAs to implement such controllers is the very important reduction of the control loop delay, which is only equal to a few microseconds. This control loop delay reduction derives directly from the possibility offered by FPGAs to design very powerful dedicated hardware architectures with free sampling instants. Numerous experimental results are shown to prove the efficiency of FPGA-based solutions to achieve high performance control.
Broadband printed CPW-fed circular slot antenna

A broadband printed CPW-fed circular slot antenna is proposed. This antenna is composed of a circular slot fed with a 50 Ω CPW line through a circular patch. A parametric study was carried out to optimise the proposed structure, and the simulated and measured results show that the proposed design offers an ultra-wide bandwidth of 143.2% (from 2.3 to 13.9 GHz).
Monitoring What and How: Psychological Implications of Electronic Performance Monitoring

Implementing electronic performance monitoring in the workplace might improve the efficiency and quality of employee data that are collected. These intended benefits might be discounted or even eliminated if employees have a negative reaction to the monitoring process. The goal of this exploratory study was therefore to investigate which electronic performance monitoring techniques and monitoring characteristics are associated with negative employee reactions using survey responses from 190 student workers. Results showed that close performance monitoring (via cameras, data entry, chat and phone recording) had significant negative effects on job attitudes such as job satisfaction and affective commitment. Similar effects were observed for employee self-efficacy and perceived control. Attitudes were furthermore negatively impacted when the monitoring was focused on individuals and unpredictable, which also reduced organisational citizenship behaviour while continuous monitoring reduced self-efficacy. These findings suggest that the benefits of close monitoring may be overshadowed by negative employee reactions.
Design Synthesis of Multistable Compliant Structures

This paper presents a methodology and an automation tool to synthesize multistable equilibrium systems (MSEs) based on an optimization method that searches for the best topologies for desired MSE system characteristics. The MSE systems generated are composed of interconnected compliant beams. The design methodology involves separate modules on representation, generation, evaluation and guidance. The algorithm is implemented in MATLAB by using a genetic algorithm (GA) as the search technique and finite element method (using ANSYS) for analysis. Results obtained for case studies on bi- stable systems show that a variety of topologies are created to meet the design goals.
Implementation of a Robust Fuzzy Adaptive Speed Tracking Control System for Permanent Magnet Synchronous Motors

This paper presents a fuzzy adaptive speed controller that guarantees a fast dynamic behavior and a precise trajectory tracking capability for surfaced-mounted permanent magnet synchronous motors (SPMSMs). The proposed fuzzy adaptive control strategy is simple and easy to implement. In addition, the proposed speed controller is very robust to system parameter and load torque variations because it does not require any accurate parameter values. The global stability of the proposed control system is analytically verified. To evaluate the proposed fuzzy adaptive speed controller, both simulation and experimental results are shown under motor parameter and load torque variations on a prototype SPMSM drive system.
Advanced Persistent Threat

Targeted cyber attacks against government and commerce have been on-going since at least 2003 and possibly some time before that. These attacks are commonly known as advanced persistent threats (APT). By far the largest sponsor of these attacks is the Chinese state, although other states also carry out attacks. This is not a new problem; it is simply espionage. These attacks are designed to steal information that will fulfil a clear set of requirements set by the attacker and furnish them with political, commercial and security/intelligence information. These requirements are carefully and clearly identified, shared with a number of government departments and constantly updated. There is evidence of worldwide targeting but only a minority of attacks are identified and fewer still made public. This article seeks to educate the reader on what APTs are, how they are different from other IT security threats and what can be done to identify and mitigate them.
Present scenario of policies & hazards related to alcohol in India

Although the use of various psychoactive substances such as alcohol, cannabis and opioids has been observed in India for centuries. Use of psychoactive substances impacts on academic, social, psychological, economical and physiological development of people with their families negatively. Alcoholic beverages are the most important product of global addiction demand, which is a reason of many deaths and diseases worldwide. Alcohol consumption is a major problem in India because of the various reasons like socio-cultural, difference in alcohol policies and practices state wise, lack of awareness of alcohol related problems, false mass media propaganda, various patterns of alcohol consumption and as a symbol of status both in urban and rural areas across the country. As per people’s opinion, they consumes it because it induces feeling of relaxation and tranquility, suppress anxiety and increases confidence. However with increasing dose, pleasant euphoric starts which means they feels that they are in heaven and that gives way to feelings of depression. That’s why this is called as substance of abuse. This review article focuses on ethyl alcohol (alcohol),its pharmacology,policies in India, different patterns of drinking, prevalence of alcohol consumption globally and nationally, medical and other consequences like suicide and road accidents, harmful effects on the mental, physical and social health with treatment options for alcoholism.
Wireless Power and Information Synchronous Transmission Technology Based on Magnetic Resonance

In order to solve the problem that electromagnetic induction widely used now is just suited to short distance transmission, and study on the transmission characteristics of wireless power transmission system based on magnetic resonant coupling, a novel method that the two separate-coupling coils achieve wireless power and information synchronous transmission is proposed. The basic theory of wireless power transmission and information system is introduced. The condition that resonant frequency splitting phenomenon is produced of a contact-less power transmission system has been deduced, and it depend on the length of distance between the two coils. The principle prototype of transmission system is designed, and transmission characteristics of the system are analyzed by simulation and experiment. Based on circuit formulation, maximum efficiency is found to exist. The results show that the method of wireless power and information synchronous transmission system is in agreement with theoretical analysis.
The Effect of Workload on Conflict Decision Making Strategies in Air Traffic Control

The present research examined the impact of workload on the strategies that air traffic controllers use when resolving conflicts between aircraft. Sixteen experienced, en route, radar controllers managed traffic in scenarios of varying levels of workload. As predicted, the level of workload did influence conflict resolution decisions in situations where the optimal solution was more complex and imposed a greater monitoring load on the controller. Specifically, in low workload participants were more likely to adopt strategies that were efficient for the aircraft; whereas in high workload controllers were likely to select expedient, but less efficient, solutions. Additionally, three broader traffic management strategies were identified. The findings reveal how workload affects decision making in this environment and have wider implications for efficiency versus safety trade-offs in similar, dynamic domains.
Application of Kalman Filter in AUV Acoustic Navigation

LBL(Long Baseline) positioning provides an important positioning and navigation method for AUV(Autonomous Underwater Vehicle)’s underwater task. Due to the complex underwater acoustic channel, and its poor anti-interference ability, a new feedback Kalman fiter algorithm was present in this paper. By combining travel time information with position information, the state of AUV was estimated accurately. By analyzing experimental results, it showed that the LBL positioning accuracy was improved, and the algorithm ensured AUV complete its autonomous navigation with high precision.
Stable and Efficient High-Tension Communication Power Supply Based on Electromagnetic Coupling

High-tension power delivery based on electromagnetic coupling for hot spot temperature in power equipment and the systems of current on-line monitoring of early warning is an effective way to solve the 'energy island' . In this paper, a miniature, low cost, high reliability, easy installation and maintenance communication power supply that based on electromagnetic coupling has been designed, it also can provide a lasting and stable power output. Since the central position of the receiver coil and the rectifier filter circuit in the power supply，Optimization design and simulation have been made for the coil and the rectifier filter circuit. A three-dimensional coil was used as the receiving coil, optimization results show that load power is 10.18w at the conditions of low-frequency and high-voltage. It achieves the objective of the miniature and low-cost. The simulation results of rectifier and regulator show that the system can transfer energy at the range of approximately 2% fluctuation.
Intermodulation Distortion Analysis of Reflection-Type IMPATT Amplifiers Using Volterra Series Representation

Intermodulation distortion generated in a stable IMPATT amplifier is analyzed using Volterra series representation. An IMPATT amplifier model, which takes into account the interaction between the nonlinearities of the diode and its embedding circuitry, is described. The Volterra transfer functions are derived for this model. Nonlinear terms up to and including the fifth order are considered. Intermodulation distortion products are calculated for a low-level input signal consisting of two tones. The results of this analysis are extrapolated into the direction of increasing output power in order to obtain the third-order intercept point. Further, closed form expressions for the third-order intermodulation IM/sub 3/ and intercept point P/sub I/ are derived. The distortion of a specific 6-GHz IMPATT amplifier is evaluated for illustrative purposes; the predicted distortion behavior compares favorably with experimental results.
Product Intelligence: Theory and Practice

Abstract Are there any benefits in allowing orders and products to be able to manage their own progress through a supply chain? The notion of associating (and even embedding) information management and reasoning capabilities with a physical product has been discussed for over ten years now. This talk will review the notions of product intelligence and examine the rationales for these models and the practicality of their implementation. Both theoretical and practical issues associated with product intelligence will be examined referencing a number of trial deployments in manufacturing, logistics and aerospace equipment servicing.
An Update on Life Cycle Study of Soybean Oil Biodiesel Production

The life cycle analysis of soybean oil biodiesel production was performed to estimate the net fossil energy balance of soybean oil biodiesel. The energy inputs were found to be less than the energy contained in the biodiesel. The net energy return of biodiesel was found to be in the range of 2.64 to 2.78 using the NREL energy allocation approach. The addition of labor, farm machinery and soybean transportation energy to this approach didn’t show much difference. Pimentel and Patzek energy allocation approach gave the net energy return in the range of 0.85:1 to 0.88:1. However, allocating energy as in NREL study, this method yielded in the net energy return above five folds (5.69 to 5.93), thus giving an energy gain that is even higher than the 3.2 value from the NREL report. The energy allocation approach plays the crucial role in the variation of the net energy return. The net gain in the energy from soybean oil biodiesel showed the effective use of fossil energy resources. This confirms the renewable nature of soybean oil biodiesel.
Fuel cells for future electric vehicles

This paper summarizes the main findings and conclusions of a study undertaken by the authors for the State of California Air Resources Board (USA). The purpose of the study was to assess the current state of automotive fuel cell technology development and the prospects for fuel cells to become practical power sources for automobiles. The study surveyed the automotive fuel cell programs of major automobile manufacturers and of fuel cell component and system developers in Europe, Japan and North America.
The effect of frequency on the resistance and internal inductance of bare ACSR conductors

An experimental investigation of the effects of varying the frequency on the electrical characteristics of a 54/19 ACSR (aluminum conductor, steel reinforced) conductor is described. Current from a sine wave alternator with precise voltage and frequency controls in the range 25 to 60 Hz was supplied to a pair of parallel tensioned lengths of the conductor, forming a loop within a nonmagnetic enclosure. The DC and AC resistances, the internal inductive reactance, the axial magnetic flux, the surface current density, and the temperature of the conductor were found. The AC-to-DC with resistance ratio was found to increase with increasing current and increasing frequency. The surface current density decreased with increasing current and increasing frequency. All these variations can be attributed to the transformer effect, resulting from the presence of the steel core and the spiraling of the layer currents, and the increase of magnetic power loss. >
Technical In-Service Needs of Agriculture Teachers in Georgia by Career Pathway

A teacher’s content knowledge, coupled with skilled teaching and a disposition for classroom service, all have a positive effect on student outcomes. This study assessed the in-service professional development needs of Georgia agriculture teachers’ in the seven career pathways defined in the Agricultural Education curriculum: Agribusiness Systems, Animal Systems, Environmental Service Systems, Food Products and Processing Systems, Natural Resources, Plant Systems, and Power and Technical Systems. Multiple areas within pathways were found to be beneficial for professional development according to teachers including: lab management, lab safety, greenhouse management, nutrition, feeds and feeding, market research, business plan development, etc. Teachers at all levels of experience noted additional professional development in plant systems and lab safety would be beneficial and teachers with less than 10 years expressed need for training in power and technical systems. Significant differences were found between male and female teachers in the area of power and technical systems, with males expressing need for additional professional development. Rural teachers saw more benefit in food processing professional development than their urban counterparts. Future research should investigate trends in professional development as it pertains to gender to provide a more tailored understanding of factors contributing to the individual needs of teachers, especially in the power and technical systems pathway. Additionally, research is needed to assess other elements of effective professional development in Agricultural Education such as the value of duration, collaboration, and reflection.
Development of a Walking-Assistance Apparatus for Neuro-Rehabilitation

We have developed a prototype for a walking-assistance apparatus that serves as a next-generation vehicle or a movable neuro-rehabilitation training appliance for the elderly or motor palsy patients. Our prototype uses a novel spatial parallel link mechanism with a weight-bearing lift. Flat steps of the apparatus move in parallel with the ground; the apparatus supports the entire leg alignment (including soles of the feet) and assists walking behavior at the ankle, knee, and hip joints simultaneously. To estimate the walking phase of each leg of the equipped person, pressure sensors were attached under the thenar eminence and the heel of the sole and the pressure variation at each sensing point was measured. To determine the direction in which the equipped person is walking, a pressure sensor was attached to the flexible crural link. Motor palsy patients and those with muscle weakness can walk with the assistance of the apparatus. Patients who have ambulation difficulty can also use the apparatus with a weight-bearing lift that we developed. Using the apparatus with the weight-bearing lift prevents stumbling and enables input of walking movement to the brain motor area. The validity of the weight-bearing lift can be confirmed from the results of the measured %maximum voluntary contraction (MVC).
Analytical Modeling for Handling Poor Signal Quality Calls in Cellular Network

Mobility and radio resource management plays a major role in Quality of Service provisioning for cellular communication systems. Due to the limited radio coverage of a cell, an ongoing call while being handed off may get dropped. We develop an effective and efficient handoff scheme using mobile controlled handoff and fractional guard channel tech- niques, where mobile station measures the signal strength from surrounding base stations and interference level on all channels. A handoff can be initiated if the signal strength of the serving base station is lower than that of other base station by certain threshold. Two models are proposed to calculate the blocking probability of new calls and the dropping probability of handoff calls, using call admission control scheme in a cellular system. Numerical analyses of both the models are carried out to investigate the impact on performance of the parameters and comparisons with conventional channel reservation schemes.
7* electrical pulse compression on an inhomogeneous nonlinear transmission line

A device which directly compresses electrical pulses using the concepts of soliton propagation along an inhomogeneous nonlinear transmission line is described. Numerical simulations on SPICE indicate that a 5 V input pulse with a FWHM of 66 ps can be compressed to a ≥10 V output pulse with a FWHM ≤5 ps. A compression factor of ≥7 has been experimentally measured on a low frequency scale model compressor.
Total Productive Maintenance in Enterprise Operations Support Processes

So far the objective of the concept of TPM has been to increase the effectiveness of production by means of involvement of operative workers at different levels in the assigned tasks. As a result, an enterprise which was focused on profits coming from its basic activity minimized production loss by implementing some preventive measures with regard to technical and technological equipment. Nowadays, the application of the concept of TPM in the area of primary processes may be insufficient to realize the assigned production targets. In the paper there are characterized the support processes which, along with the use of the principles of TPM, constitute a coherent idea while aiming at minimizing loss and not only the production loss.
Modified acceleration feedback for active vibration control of aerospace structures

An acceleration feedback control method suggested in several past studies is modified to include two compensators, one first order and another second order, to separately control the closed-loop system stiffness and damping. The second order compensator has a damping ratio that is as low as that of the flexible structure in order to provide periodic vibration control. The first order compensator is used to provide the necessary damping, simultaneously. Employing two separate compensators allow us to provide stiffness and damping control in a dynamically decoupled manner. The new controller is readily applicable to a strain-based sensing and actuating approach, such as piezoelectrically controlled systems. Control gains are obtained through a stability analysis that is described in detail in the paper. The effectiveness of the controller is verified experimentally using a test setup that includes a flexible plate. The plate includes two small piezoelectric patches that are used as control actuators. Ten miniature size accelerometers are mounted on the plate for measuring plate vibrations. Two piezoelectric actuators in different positions are used for vibration control of the plate and the results are compared with the condition in which only one actuator is used. In addition, the results confirm that the new controller is able to effectively control more than one frequency simultaneously.
Loads on ships and offshore structures

The Loads Committee of the International Ship and Offshore Structures Congress (ISSC) critically reviews the state of the art of environmental and operational loads. Amongst these, elements more relevant to the offshore industry will be presented in this paper. These comprise wave-induced loads, including linear and nonlinear methods, multi-body interactions, slamming, green water, sloshing and rogue waves, cables and risers, vortex-induced vibrations, ice loads, fatigue loading and, verification and validation.
Dual‐Frequency and Dual‐Mode Circular Patch Antennas Based on Epsilon‐Negative Transmission Line

Dual‐frequency and dual‐mode circular patch antennas based on epsilon‐negative (ENG) transmission line have been investigated. By input impedance matching, the TM01 mode with omnidirectional radiation pattern and TM11 mode with directional radiation pattern can be excited at two separate frequencies, and then the dual‐frequency and dual‐mode operation is achieved. Compared with the conventional dual‐frequency or dual‐mode patch antennas, the new designed antenna only need one patch and one feed. More important, the omnidirectional mode of proposed antenna can be excited at lower frequency than directional mode, and the frequency ratio of the two modes can be tuned by changing the number of the ENG unit cell. The performances of the proposed antennas are studied numerically and experimentally. The measured results are in good agreement with the simulated ones. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2393–2398, 2013
BORMAN EXPRESSWAY ATMS EQUIPMENT EVALUATION

This report presents an evaluation of the performance of the equipment involved in an Advanced Traffic Management System (ATMS) on the Borman Expressway. The report first gives an overview of the Borman Expressway ATMS, including the system architecture, the surveillance system, the communications system, the incident response system, and the effect of institutional issues. Next, the goals, objectives, and hypotheses of this evaluation are listed. The results of the evaluation are then discussed and conclusions are offered.