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1 – 10 of over 15000I.R. Ramos, S.B. Valdez, K.R. Zlatev, W.M Schorr, B.M. Carrillo, M.S. Stoytcheva, I.R. Garcia and M.M. Martinez
– The purpose of this investigation was to develop a digital instrument for the quantitative evaluation of pitting corrosion in metals.
Abstract
Purpose
The purpose of this investigation was to develop a digital instrument for the quantitative evaluation of pitting corrosion in metals.
Design/methodology/approach
This investigation comprised two central parts: research, testing and monitoring of the formation of pitting by conventional methods and applying American Society for Testing and Materials (ASTM) Standards, and the development of a virtual instrument based on the LabVIEW 2010 platform.
Findings
The methodology used was suitable for the analysis of pitting on carbon steel and aluminum alloy UNS A96061, used in the aerospace industry.
Practical implications
This technique allows pits to be to localized, measured and quantified on metallic surfaces, for corrosion evaluation in atmospheric and industrial environments.
Originality/value
This combination of conventional and digital methods can assist in corrosion control of pitting in industrial equipment.
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Marko A. Dimitrijević and Milutin Petronijević
This paper aims to propose a new approach to testing distributed energy resources (DERs) in compliance with the IEEE 1547-2018 standard and describes a new, integrated testing and…
Abstract
Purpose
This paper aims to propose a new approach to testing distributed energy resources (DERs) in compliance with the IEEE 1547-2018 standard and describes a new, integrated testing and validation system.
Design/methodology/approach
The system is built on the virtual instrumentation paradigm, using acquisition modules to measure physical quantities, while signal processing, including intensive calculations of required parameters, data processing, manipulation and reporting are performed on a computing device.
Findings
Intensive laboratory measurements were performed on a laboratory prototype of a microgrid that emulates DERs. The results obtained using the system described were compared with the measurements obtained by the reference instruments. As all the results match, the usability of the system was verified.
Practical implications
This approach to the realization of the testing and validation system has obvious advantages compared to the classical instruments and provides significant flexibility in multiple aspects. First, the system described integrates all the functions of different instruments into one measuring system, making the entire testing and validation process significantly cheaper and faster. Second, the implementation of the system is possible on different computing platforms depending on specific needs. Third, the software implementation of the system functions enables simple upgrading and the introduction of new functions or changes to existing ones according to changes in the standard. Finally, the system described is designed to automatically provide reports on compliance with the standard.
Originality/value
This paper emphasizes the advantages of the proposed approach over classical testing. The value of the paper is reflected in the applicability and practical implications of the proposed and described hardware and software technical solutions.
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Maryna Utkina, Roman Samsin and Maksym Pochtovyi
This paper aims to illustrate how virtual assets are used in such criminal offenses as money laundering and seeks to study the role of financial intelligence (monitoring) of…
Abstract
Purpose
This paper aims to illustrate how virtual assets are used in such criminal offenses as money laundering and seeks to study the role of financial intelligence (monitoring) of transactions with virtual assets effectively in combating money laundering.
Design/methodology/approach
This research methodology includes system and structural methods that help analyze the theoretical, organizational and legal bases of the financial intelligence (monitoring) of transactions with virtual assets. The authors use the doctrinal legal research approach to analyze and describe the legislation connected to the financial intelligence (monitoring) operations with virtual assets. To identify critical issues of understanding the “virtual assets” and “cryptocurrency” essence, the peculiarities of the scientific community views on the given definitions, the authors use the method of terminological analysis and concepts operationalization. The authors use the extrapolation method to determine the possibility of implementing the analyzed best practices of foreign countries in the domestic practice of financial intelligence (monitoring) of transactions with virtual assets as an effective way in combating money laundering.
Findings
This study demonstrates the role of financial intelligence (monitoring) of transactions with virtual assets as an effective way to combat money laundering.
Originality/value
The article is devoted to comprehensively studying “virtual assets” and “cryptocurrency” concepts. The authors carried out a comparative analysis of these two concepts with the definition of their features and the main characteristics and features that separate them from each other. The authors also stressed the need for countries to strengthen the requirements for situations and activities with virtual assets, where there is a high level of risk in a risk-based approach.
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Karine Bauer and Luciano Mendes
Weblabs are an additional resource in the execution of experiments in control engineering education, making learning process more flexible both in time, by allowing extra class…
Abstract
Purpose
Weblabs are an additional resource in the execution of experiments in control engineering education, making learning process more flexible both in time, by allowing extra class laboratory activities, and space, bringing the learning experience to remote locations where experimentation facilities would not be available. The purpose of this paper is to investigate and report on a weblab project where the speed of a DC motor is controlled in closed loop, being the control system parameters set by the remote user (student).
Design/methodology/approach
The engine control experiments are run and on‐line transmitted by videoconference over the internet, from a didactical plant physically located at the Systems and Automation Laboratory of the Control and Automation Engineering department of the Pontifical Catholic University of Parana. The system response (transient motor speed) to the user's choice of parameters is evaluated through performance indices (IAE, ITAE), which are used to qualify the ability of the student to tune PID and RTS control algorithms. There is an option to run experiments in open loop, so the student can perform preliminary analysis to identify the system dynamic model and then apply mathematical models and computational methods, learned in theoretical classes, to define best performance control parameters. A simulation function was implemented, to further help the student in the problem solution. Virtual instrumentation resources were used to implement the Weblab, using the DC motor of a laboratory didactical plant. A local server runs a LabVIEWTM application, which can be remotely accessed in the client side through a web browser, where the system front panel is reproduced. This remote interface is directly originated at the LabVIEWTM application, through an embedded web server. At the user request, the control of the remote system is granted. The user interface is cognitive, with motor speed, control signal, set point and all the pertinent information displayed in evolving charts and indicators. Microsoft™ Skype is used to establish a videoconference with the laboratory where the plant is located. Results of the user experiments are stored in local files, which can be e‐mailed to the user at his command by the end of the session.
Findings
Used as a platform in weblab projects, LabVIEW combined with Skype provides a suitable solution for the necessary software/hardware integration for communications with data acquisition systems and advanced connectivity resources. In virtual instrumentation Skype has proved to be efficient in establishing the right environment without the need for developing complex software for teaching practical control engineering concepts.
Research limitations/implications
The level of performance (speed of acquisition, accuracy and number of parameters that could be evaluated) of the current system would need to be evaluated compared to some existing systems. The implication is the changes brought to the adopted approach to the development of, access to and the overall cost of producing virtual laboratory systems used for science, engineering and technology education.
Practical implications
With further effort, the current and similar systems could be further upgraded with user login control and server, so that results can be submitted to the tutor, thus acting as a learning evaluation instrument.
Originality/value
The originality of this research lies in the innovative integration of technology in education, which involves the implementation of a carefully designed, cost‐effective virtual laboratory for teaching and learning of concepts in control engineering.
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Aqeel Farooq, Wadee Alhalabi and Sara M. Alahmadi
The purpose of this research work is to design and apply LabVIEW in the area of traffic maintenance and flow, by introducing improvements in the smart city. The objective is to…
Abstract
Purpose
The purpose of this research work is to design and apply LabVIEW in the area of traffic maintenance and flow, by introducing improvements in the smart city. The objective is to introduce the automated human–machine interface (HMI) – a computer-based graphical user interface (GUI) – for measuring the traffic flow and detecting faults in poles.
Design/methodology/approach
This research paper is based on the use of LabVIEW for designing the HMI for a traffic system in a smart city. This includes considerable measures that are: smart flow of traffic, violation detection on the signal, fault measurement in the traffic pole, locking down of cars for emergency and measuring parameters inside the cars.
Findings
In this paper, the GUIs and the required circuitry for making improvements in the infrastructure of traffic systems have been designed and proposed, with their respective required hardware. Several measured conditions have been discussed in detail.
Research limitations/implications
PJRC Teensy 3.1 has been used because it contains enough general-purpose input–output (GPIO) pins required for monitoring parameters that are used for maintaining the necessary flow of traffic and monitor the proposed study case. A combination of sensors such as infrared, accelerometer, magnetic compass, temperature sensor, current sensors, ultrasonic sensor, fingerprint readers, etc. are used to create a monitoring environment for the application. Using Teensy and LabVIEW, the system costs less and is effective in terms of performance.
Practical implications
The microprocessor board shields for placing actuators and sensors and for attaching the input/output (I/O) to the LED indicators and display have been designed. A circuitry for scaling voltage, i.e. making sensor readings to read limits, has been designed. A combination of certain sensors, at different signals, will lead to a secure and more durable control of traffic. The proposed applications with its hardware and software cost less, are effective and can be easily used for making the city’s traffic services smart. For alarm levels, the desired alarm level can be set from the front panel for certain conditions from the monitoring station. For this, virtual channels can be created for allowing the operator to set any random value for limits. If the sensor value crosses the alarm value, then the corresponding alarm displays an alert. The system works by using efficient decision-making techniques and stores the data along with the corresponding time of operation, for future decisions.
Originality/value
This study is an advanced research of its category because it combines the field of electrical engineering, computer science and traffic systems by using LabVIEW.
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A. Cordery, N. Kilbey and N. Suthiwongsunthorn
The present paper discusses the development of a test methodology for evaluation of the electrical performance of flip‐chip devices. A dedicated test chip was designed for this…
Abstract
The present paper discusses the development of a test methodology for evaluation of the electrical performance of flip‐chip devices. A dedicated test chip was designed for this experiment. The test structure contains passive and active semiconductor devices manufactured using CMOS technology. Bond pads were designed to facilitate bumping. A Printed Circuit Board (PCB) housing the flipped devices was also designed for easy access to the individual devices. A test set‐up for measuring the structures was developed and key device parameters to monitor the electrical performance of the structures were identified.The results show that the proposed test structure is a suitable tool for determining the electrical parameters of flip‐chip devices. The experimental set‐up is universal and can be adapted to suit different custom‐designed flip‐chip test structures. In addition, the developed test set‐up is computer controlled and allows easy adaptation to different measurement techniques and devices.
H. J. P. Timmermans and E. Hato
In this chapter, we address the question if and how modern technology can be used to design questionnaires, diaries, web sites, and experiments to improve the validity of…
Abstract
In this chapter, we address the question if and how modern technology can be used to design questionnaires, diaries, web sites, and experiments to improve the validity of reliability of active data collection instruments. In particular, it discusses the history of computer-assisted activity diary data, reenactment sessions, stated preference methods, and interactive computer experiments with a special focus on the design of these instruments in terms of respondent support and user interfaces. Empirical evidence and experience suggests that although fascinating instruments may increase respondent motivation and involvement and therefore improve the reliability of the measurements, there is also the danger that respondents' answers are influenced by features of the electronic instrument that are not essential, reducing validity and reliability.
This paper aims to discuss the possibility of joining cybernetics and architecture as a continuous and open process, bridging design, construction and use, in that which is called…
Abstract
Purpose
This paper aims to discuss the possibility of joining cybernetics and architecture as a continuous and open process, bridging design, construction and use, in that which is called cyberarchitecture.
Design/methodology/approach
It develops the hypothesis that cyberarchitecture can benefit from taking the virtual into account in the design process, so that the architect is no longer the author of a finished architectural product, but of a set of instruments with which users can design, build and use their own environments simultaneously.
Findings
A set of design principles is systematised and examined in three practical realms of design: urban, building, and relational, showing cyberarchitecture's embryonic feasibility.
Practical implications
Cyberarchitecture implies that architects are no longer authors of finished products and users, becoming designers of their own spaces.
Originality/value
Cyberarchitecture avoids the usual cybernetics approach based on control‐system, indicating a less predictive and, ultimately, anarchic path for architects and users. It focuses on architecture's intrinsic value as an event, indicating the possibility of a process‐based system, which only exists (or is organised) in present‐time, when users and instruments (or structures) interact.
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Examines how the personal computer has brought about dramatic changes inautomatic test equipment [ATE] in electronics manufacturing.Describes the three major instrumentation types…
Abstract
Examines how the personal computer has brought about dramatic changes in automatic test equipment [ATE] in electronics manufacturing. Describes the three major instrumentation types used in ATE today, the GPIB [general purpose interface bus] the VXI [VME eXtensions for instrumentation] and DAQ [data acquisition cards]. Looks at instrument drivers which provide the programmer with an interactive front panel enabling them to manipulate the instruments using a PC mouse and keyboard. Also looks at test executive software and the three main tasks it performs of test flow control, data logging and user interfacing. Concludes that in the ever changing world of ATE, virtual instrumentation is opening the system architecture of ATE and driving costs down by capitalizing on the power and low cost of the PC.
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Explores a PC‐based multi‐function virtual test andmeasurement system for automated manufacturing lines. The system includessingle and dual channel oscilloscopes, a 50MHz spectrum…
Abstract
Explores a PC‐based multi‐function virtual test and measurement system for automated manufacturing lines. The system includes single and dual channel oscilloscopes, a 50MHz spectrum analyzer, a multifunctional digital voltmeter and a 20MHz digital frequency meter. Outlines the benefits of the system including the availability of high‐performance instruments anywhere there is a PC cost saving and space saving. It also has considerable potential training test and maintenance personnel.
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