Field Of Electronic Engineering Research Articles

Research and Design of DDS Low Frequency Signal Generator Based on FPGA

Signal generator is the most widely used basic instrument in the field of electronic technology. The research and development of DDS low frequency signal generator based on FPGA has certain practical significance. With the core of EP2C8Q208C8N and the necessary peripheral analog circuit, a low frequency signal generator based on direct digital frequency synthesis technology is designed and its output performance is tested under the control of Verilog program.

Numerical investigation of surface and leaky acoustic wave properties in SrLaGa3O7 crystal

For surface acoustic wave (SAW) devices operating at elevated ambient temperatures, piezoelectric crystals that have stable material properties at high temperatures are desirable. The progress in the field of electronic technologies has increased the demand for high-temperature piezoelectric materials for the use in temperature and pressure sensors. Recently, SAW sensors have been operated at room temperature or 100°C ÷ 300°C at most. A new piezoelectric SrLaGa3O7 crystal belongs to tetragonal symmetry class, and has stability of its piezoelectric properties up to the melting temperature of 1650°C. Numerical simulation of the properties of surface and leaky acoustic waves in the SrLaGa3O7 single crystal is performed. The SAW has a maximum value of the electromechanical coupling coefficient (~ 0.25%) on Z+64°-cut and propagation direction along the X-axis. In the same propagation direction, the electromechanical coupling coefficient of the leaky wave is 3.5 times lower than that of SAW. The SAW has large electromechanical coupling coefficient value (~0.24%) on Z, X+45°-cut of the crystal. It is shown that these two cuts of the SrLaGa3O7 single crystal are promising for use in the SAW devices.

Organizational Commitment Survey: A Confirmatory Factorial Analysis Based on Vocational Colleges Teachers Sample

This study was conducted to verify the construct model for organizational commitment among technical teachers at the Vocational College under the Ministry of Education. A study involving 25 vocational colleges with a total sample of 493 people consisting of teachers in mechanical engineering, electrical and electronic engineering fields, and engineering. This study uses Structural Equation Modeling (SEM) approach with AMOS 20 software. Researchers used the Organizational Commitment Questionnaire (OCQ) developed by Meyer, Allen, and Smith (1993) and Meyer and Allen (1997), comprising three substructures namely affective commitment, normative commitment and continuous commitment. The number of items is 24, 8 items per sub construct and after exploratory factor analysis is carried out there were only 22 items left. In order to ensure that the organization's commitment measuring model is verified, three factors have been evaluated as unidimensionality (looking at the factor loading ≥ 0.6), Validity (convergent validity AVE ≥ 0.5, and construct validity refers to fitness indexes) and Reliability (composite reliability, CR ≥ 0.6 and Average Variance Extracted ≥ 0.5). After the CFA analysis is carried out no items were dropped because all items have loading factors> 0.6, AVE ≥ 0.5 values for all sub constructs. While fitness indexes for Absolute Fit (RMESA = 0.062), Incremental Fit (CFI = 0.953, TLI = 0.945) and Parsimonious Fit (Chisq/df = 2.918) met the requirements set for all CR values ≥ 0.6. It can be concluded that after the measurement model was modified by looping between items, the model was fit to be used for structural model analysis process.

Research of Harmonics in Power System Signal using Gaussian’s Distribution Overlapping by Receiver Operating Characteristics (Roc) Curve

Harmonic analysis of the power system signal is a proliferating research in the field of electronics technology. Whenever, we analyze odd and ever harmonics are present in the signal, imperative operation is needed to transform from the time domain to the frequency domain. Hence, all the researchers are utilizing the Fourier Transform technique is very effective for the analysis of odd and even harmonics in the frequency domain. In the past two decades, Wavelet Transform is a wonderful technique to analyze the harmonics both frequency and time domain as well. The analysis of harmonic and its probability distribution are most important for the purpose to predict the harmonic effects in the present situation. We treated all the harmonics and its corresponding frequency distribution are considered as a zero mean unit variance. The overlapping these distributions (small, medium, large) are analyzed with help of statistical data processing technique. It is one of the most important basic plots in the decision theory and it provides the constructive decision about the overlapping of a frequency distribution in power system signal. The curvature as a plot of sensitivity and specificity underlying the harmonics are present and not present distributive (Gaussian). The above determined values are lying in the interval probability [0, 1] and it is depends only the nature of the dataset. In this paper, we explained with help of MATLAB and level of understand the basic concept of ROC is demonstrated. The dataset is drawn from the example of odd and even harmonics are generated and the probability distribution as input to our MATLAB program.

Дослідження професійної підготовки фахівців з електроніки в Україні та США: базові поняття

The article explores the impact of the rapid development of electronic devices and systems in the world, in particular in the USA on setting the new challenges for Ukrainian engineering universities to attract advanced experience in training Electronics Engineering professionals. Since there are differences in the interpretation of a number of concepts in the area of Electronic Engineering in Ukrainian education as compared to the US, the article examines the relationship between the terms «electrical» and «electronic engineering», defines and compares such concepts as «electronics specialist», «electronics engineer», «professional training of electronics specialists», and «US higher education institution» in Ukrainian and US educational and scientific settings. The article advances our understanding of professional occupation outlook of a specialist in as a professional, who studies the field of electronic engineering, and is involved in the study, design, development or testing of electronic components, circuits and systems for commercial, industrial, military or scientific use using knowledge of electronic theory and its properties. By comparing Ukrainian and US higher education institutions in terms of their views and approaches to training electronics engineers and mutual understanding of Electronic Engineering as an electrical engineering discipline, together these findings provide important insights into application of engineering training practices into Ukrainian tertiary engineering settings, give grounds for a further research into pedagogical theory as well as organization and network of higher education institutions for training electronics engineers in order to implement the best practices in higher education institutions of Ukraine.

21世紀COEプログラムの研究促進効果の実証分析 : 生命科学,情報・電気・電子,社会科学分野における分析

21世紀COEプログラムの研究促進効果の実証分析 : 生命科学,情報・電気・電子,社会科学分野における分析

A Strategy for Material Supply Chain Sustainability: Enabling a Circular Economy in the Electronics Industry through Green Engineering

Rapid innovation in the field of electronic technologies through the use of rare earth and specialty elements (RESE) has made the electronics industry one of the most rapidly evolving industries to date. However, innovations to harvest these same materials from complex waste streams have not kept pace, thus leading to an unsustainable material supply chain reliant on the mining of increasingly difficult-to-extract ores. Here, we aim to provide a strategy to mitigate these challenges, identifying the technical research and development needed to further sustainable electronics through Green Engineering and the vision of a “circular economy”. This strategy includes (1) design devices for disassembly, (2) materials for substitution, (3) manufacturing processes that enable the use of recycled materials, (4) fabrication efficiency, (5) technology interventions to enable e-waste recovery, (6) methods to collect and separate e-waste components, (7) technologies to digest and recover RESE, and (8) technologies to ...

Logic circuits composed of flexible carbon nanotube thin-film transistor and ultra-thin polymer gate dielectric.

Printing electronics has become increasingly prominent in the field of electronic engineering because this method is highly efficient at producing flexible, low-cost and large-scale thin-film transistors. However, TFTs are typically constructed with rigid insulating layers consisting of oxides and nitrides that are brittle and require high processing temperatures, which can cause a number of problems when used in printed flexible TFTs. In this study, we address these issues and demonstrate a method of producing inkjet-printed TFTs that include an ultra-thin polymeric dielectric layer produced by initiated chemical vapor deposition (iCVD) at room temperature and highly purified 99.9% semiconducting carbon nanotubes. Our integrated approach enables the production of flexible logic circuits consisting of CNT-TFTs on a polyethersulfone (PES) substrate that have a high mobility (up to 9.76 cm2 V−1 sec−1), a low operating voltage (less than 4 V), a high current on/off ratio (3 × 104), and a total device yield of 90%. Thus, it should be emphasized that this study delineates a guideline for the feasibility of producing flexible CNT-TFT logic circuits with high performance based on a low-cost and simple fabrication process.

Analyses of Verb Tense and Voice of Research Article Abstracts in Engineering Journals

This paper seeks to analyze the research article abstracts among native English speakers and non-native (Iranian) speakers in the field of Electronic engineering. The analysis mainly focuses on the rhetorical structure, i.e. the constituent Moves/Sub-Moves. In addition, Verb choices and the voice and tense of the verbs in Move 2 and Move 4 respectively were examined. To this end, 25 published abstracts from each field (a total of 50 abstracts), all appearing in established, ISI journals, were selected. The model proposed by Santos (1996), composed of 5 moves along AntMover software was employed as a general guideline in order to identify Moves/SubMoves. The results compared and contrasted the dominant move patterns of each field, their unique Move/SubMoves, and the typical voice and tense of verbs employed in Move 4. It was also found that there were some variations between the abstracts written by native English speakers and nonnative speakers of English. It is hoped that with detailed analyses of abstracts, the results of this study may serve as a complement to the guidelines for novice writers to construct a proper research article abstract in electronic engineering.

Implementation of the DES Algorithm on EDA Box

The EDA (Electronic Design Automation) technique which provides us an alternative method of circuit system based on the PC and information technology is a novel technique in modern electronic engineering field. Research on implementation of the DES (data encryption standard) has been paid much attention. In this paper, a description of the DES implementation on EDA box is presented in an alternative method which is suitable for EDA experimental teaching. The DES is set to different parts according to EDA experimental content. We introduce in detail the sub-circuits which consist of the circuits of the DES from simple units to large scale parts, which is easy for students or beginners to learn hardware implementation of cipher algorithm.

Power Electronics Open-Source Educational Platform

Learning Power Electronics is essential in both electrical and electronic engineering fields and the introductory courses are similar in many universities. Taking this premise into account, an educational computer-aided platform for power electronics will be presented in this paper. This educational platform includes an e-book, a set of power electronics animations, Java simulations, as well as several hands-on training sessions. The main advantages of this platform are twofold. First, all necessary teaching tools are combined on a single platform. And secondly, access to this platform is available free of charge and with no complicated registration requirements. In addition to traditional teaching techniques, the use of this platform has demonstrated an increase in student participation and has consistently improved their academic performance. Data consist of surveys, which guarantee both reliability and validity through psychometric techniques.

An Analysis of Bachelor Final Year Projects Content in Electronic Engineering at KTU

An overview of electronic engineering field related skills, tools used to prove them, fields of applications and final year project grades are presented based on the data collected from project reports in the period 2006-2010 at Kaunas university of technology, Telecommunications and Electronics Faculty. Large diversity of the projects makes it hard to compose well defined assessment criteria but noticeably large deviation of given grades calls for better formalization of assessment criteria. A list of criteria was suggested and it was shown that average grades do not contradict with it even prior to its legalized acceptance. Ill. 9, bibl. 7, tabl. 2 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.116.10.898

La science en projets : financements sur projet, autonomie professionnelle et transformations du travail des chercheurs académiques

Drawing on the literature on changes in professional work settings, this article explores the transformations of academic research in the field of electronic engineering and micro/nanotechnology. It examines how changes in funding regimes (i.e. the development of project funding) have reconfigured the “conditions of possibility” for professional autonomy, the contents of academic work and the organization of research groups.

Educational activities around a car park scale model

It is of fundamental importance that the training which university students receive during their education is perceived as being as relevant to real life situations as possible. This is often achieved by using scale models. The use of scale models can lead to increased student motivation as well as improving the process of learning and the quality of the results obtained. In this sense, scale models offer a compromise between purely virtual environments and the real systems, which are rarely a viable option within educational contexts. This work demonstrates the benefits of using a scale model of a car park, as the working environment for studies that fall between the fields of electronic engineering and computer science. The use of this scale model has allowed the development of activities related to the integration of combined hardware/software systems, the use of robots, the design and development of software programmes, and the use of communication standards, among others. It should be pointed out that the activities developed around the scale model have been matched carefully to international recommendations. This work describes the structure of the scale model, the integrated elements, and the most notable educational activities.

Computer modelling of the laser ablation of polymers

Laser ablation of polymers has been the subject of extensive studies for nearly three decades. Results of these investigations have shown that thermal effects play an important role during frequency tripled nanosecond Nd:YAG laser ablation of polyimide. Despite of the studies, effect of these processes has not been satisfactorily clarified. Thermal effects, photochemical and other phenomena still exist and so the thermal modelling of laser ablation is a very specialised problem. The investigation in this paper deals with special conditions in thermal models, which highly differ from more common conditions. Although there are numerous excellent thermal modelling software available, mainly in the field of electronics technology, these are not suitable or ready for handling special conditions, for example the removing of material from the domain under investigation, which is one of the most important areas. Hence we decided to develop a special thermal modelling tool. The model designing aspects which define the development process are presented in this paper.

RTD Fluxgate behavioral model for circuit simulation

SPICE simulation is universally recognized as a powerful tool in the field of electronic engineering. Simulations are strategic when dealing with a strong non-linear behavior that cannot be easily handled analytically. Magnetic hysteresis is one example of non-linearity that founds many practical applications, especially in the field of magnetometers and magnetic sensors. The aim of this paper is to present a behavioral model of RTD Fluxgate magnetometers easy to implement and adaptive with respect to the dynamic of the driving signal. Even if the whole work is focused on a specific magnetometer, the developed methodology can generalized to the wide class of hysteretic devices.

Potential Applications of Nanotechnology in Pavement Engineering

Nanotechnology is the term used to cover the design, construction, and utilization of structures with at least one dimension measured in nanometers. Compared with typical civil engineering structures, the two fields operate on hugely divergent dimensional scales. Nanotechnology initially developed in the fields of physics and chemistry, and most fundamental developments still occur in these fields. However, for the technology to affect society at large, it needs to be applied in areas such as the engineering field. This paper focuses specifically on current and potential developments in pavement engineering where the unique properties of nanomaterials may be used to deliver a better environment to society, based on identified needs and challenges in the pavement engineering field. It is demonstrated that there are essentially two areas where nanotechnology can complement pavement engineering. These are in the development of improved materials and the use of characterization methods to improve the understanding of materials. Examples of current and planned research in these areas are cited and discussed. Finally, current challenges in exploiting the unique properties of nanomaterials in pavement engineering are indicated and discussed. The paper demonstrates that although the majority of the fundamental developments in nanoscale science and technology are occurring in the fundamental physics, chemistry, and typically electronic engineering fields, the potential for this technology to impact on the quality of life of society at large is huge.

SIGNAL PROCESSING FOR ACOUSTIC NEUTRINO DETECTION IN WATER, ICE AND SALT

The recovery of neutrino induced acoustic signals, whether it be in water, ice or salt is very challenging, as the amplitude of the signals are small, the event rate low, and there is the presence of a strong and not completely understood acoustic background. There is a need for new and sophisticated techniques, which have not traditionally been used in the area of Astroparticle Physics in order to separate the signal from this background. There exists however a mature area named Signal Processing which is extensively used in the fields of Electronic Engineering and Communications. This paper is an attempt to show how signal-processing techniques can be applied in acoustic neutrino detection.

Automatic Generation of Hybrid Hw/Sw Applications by means of COTS Component Integration

The great advances achieved in the field of electronic engineering have given rise to new hybrid systems which combine the higher flexibility of software (Sw) with the better performance of hardware (Hw). In this paper we present a novel approach to the design and implementation of this kind of hybrid systems which covers their whole development life-cycle. This proposal integrates two of the currently most popular software development paradigms: component-based software engineering and automatic software generation. Although this paper presents the results of applying this new approach to the specific domain of Visual Information Processing Systems (VIPS), it can be easily extended to cover different domains such as control applications or telecommunication systems. As a part of this work a new visual programming tool called IP-CoDER has been developed which allows incrementally building new VIPS from the design and partitioning of functional prototypes to the automatic generation of the final Hw/Sw hybrid system.

Knowledge-based systems for instrumentation diagnosis, system configuration and circuit and system design

A number of knowledge-based systems in the electronic engineering field have been developed in the past decade. These include those that use knowledge-based techniques to diagnose instrumentation, determine system configurations and to aid circuit and system design. This paper reviews the literature on knowledge-based systems for electronic engineering applications in these areas and reports progress made in the development of a basis for realising electronic systems.