bluuebunny/crossref_metadata_2025 huggingface dataset:
Polo de competitividade e parcerias de inovação
Authors: Sabbado da Rosa Laura
Published: September 2015

A implementação de polos de competitividade, desde 2006, faz parte de uma política governamental para apoiar as empresas e territórios no intuito de melhor posicionar a França na competição econômica internacional. O objetivo é fortalecer a base industrial em algumas regiões por uma importante injeção de investimentos públicos em projetos relacionados à inovação e à internacionalização das empresas. Este texto trata dos efeitos da instalação do polo de competitividade “Arve-Industries” e, em particular, do grau de envolvimento das PME (pequenas e médias empresas)locais na abordagem coletiva para a inovação. Do ponto de vista teórico, utilizamos, por um lado, a abordagem da economia territorial, uma vez que a noção de território é parte integrante da lógica dos polos de competitividade, e, por outro, adotamos os estudos relativos à dinâmica de produção e transferência de conhecimentos nas redes territorializadas. Em ambas as abordagens, a proximidade é apresentada como um fator importante subjacente às relações de cooperação entre as partes interessadas (empresas, laboratórios e universidades) no campo da tecnologia. E isso acontece porque a inovação mobiliza os conhecimentos tácitos, pouco formalizados, cuja circulação depende fortemente de uma componente relacional presente em um ambiente territorial. Do ponto de vista empírico, este trabalho é baseado em uma pesquisa de campo realizada por meio de entrevistas semidirigidas com 22 gestores de PME e 6 gestores de organizações de apoio à indústria local. O principal objetivo foi o de avaliar os pontos de vista das PME sobre o funcionamento do polo e sua participação nos projetos propostos. Observamos, assim, que o meio dos pequenos empregadores locais está dividido. Quando perguntados sobre sua relação com a organização, há quem veja apenas benefícios em mantê-la e outros que se mostram um pouco relutantes em se integrar a ela, destacando as desvantagens de darem esse passo. De modo geral, os efeitos do polo sobre a dinâmica local de parceria são ainda bastante modestos por uma série de razões, entre estas, o fato de ser uma iniciativa recente cuja estratégia ainda não está adaptada às especificidades das PME. Deve-se considerar também a natureza individualista do pequeno empresário, pouco inclinado a fazer esse caminho em direção a uma abordagem colaborativa com parceiros potenciais. Em suma, a transferência de conhecimentos técnicos explícitos, característica importante de um ambiente inovador, não é uma prática generalizada nas PME pesquisadas. No entanto, o polo representa um apoio importante para sua adaptação às novas exigências da globalização, fornecendo os meios de evoluir para tecnologias futuras, o que, no caso particular do Vale do Arve, diz respeito à transição da microusinagem para a mecatrônica. Finalmente, o objetivo deste trabalho é contribuir para o acompanhamento da ação dos polos de competitividade na França e, especialmente, para as discussões sobre o papel das PME nas dinâmicas locais de inovação.
Knowledge and Technology Transfer Support Potential of Intermediate Organizations
Authors: Kesting Tobias , Wurth Bernd
Published: September 2015

This chapter aims at analyzing and optimizing the requirements of the internal environment regarding university-business cooperation (UBC). It focuses on university Technology Transfer Offices (TTOs), intermediate organizations embedded within the university environment. They support knowledge and technology transfer (KTT) activities, particularly the commercialization of research-based products. TTOs are supposed to accelerate and facilitate KTT from science into business practice. Although literature on university research commercialization highlights the relevance of transfer support by TTOs, empirical studies and KTT practice show that TTO services are used rather sparsely. Based on theoretical considerations and results of recent empirical studies on KTT, this chapter discusses two practice cases to derive indicators for a better exploitation of unused KTT support potential of TTOs. The results show that personal engagement aimed at a marketing service provider philosophy emerges as the key factor for fostering and intensifying cooperation between researchers and TTOs.
The Commercialisation and Adoption of Emerging Technologies
Authors: De Coster Rebecca , McEwen Colin
Published: September 2015

Professional Service Firms (PSFs) are organisations that may support technology firms and play a role in taking new or emerging technologies through the commercialisation process including developing competitive strategies and facilitating the business development activities. The focus of this chapter is how PSFs influence the commercialisation and adoption of new or emerging technologies which is examined through three case studies: Telemedicine; Wearable Technology and Mobile Services. They can either assist vendors through the commercialisation activities directly or indirectly by aiding with networking aspects. Further, PSFs may facilitate knowledge transfer from specialised research centres (either university or commercial centres) or spin-off firms (from established technology companies).
The Social Media “Information Explosion” Spectacle
Authors: Kohle Friedrich H.
Published: September 2015

The semantic web, social media and the amount of user-generated content continues to grow at a staggering rate. Social Media significantly contributed to the information flow during the Arab Spring, the Occupy and Wall Street movement continue to maintain a global online presence using social media technology. But is the social media information explosion really a unique event in media history? How did story telling evolve into social media? In order to place social media in its historical context and anticipate digital native expectations, we explore the origins of narrative and storytelling from the perspective of a documentary producer. How did past media technologies prepare the way for social media? How do digital natives perceive the world via social media and what do they expect from today's documentary producer? What are the viewing habits of digital natives? What do previous ‘information explosions' have in common with social and digital media? These are essential questions for media and documentary producers navigating their way through the vast maze of social media technology and the semantic web, in addition to traditional media.
Digital Inclusion
Authors: Cuevas-Cerveró Aurora
Published: September 2015

This chapter discusses digital inclusion from a social, educational and cultural dimension. The author considers concepts that have been of great importance in the historical development, such as culture, citizenship and education in the interest of raising an overview of the digital inclusion reflective and critical. Different perspectives of digital inclusion are described, from the perspective more socially oriented to eliminate the gap of digital access to the current perspective, the integration of the citizenship in a mediated society by the emergent information technologies with needs oriented towards the training in access, use, evaluation and communication of information. The chapter concludes by stressing the importance of information literacy to prevent social inequalities but proposes that training of citizenship is made from a humanistic perspective that transcends the merely instrumental and approaching what we call a culture of information, understood as a necessary prerequisite for integration of citizens in society.
Why the Institutional Access Digital Divide Might Be More Significant than the Home Broadband Divide
Authors: McConnell Christopher , Straubhaar Joseph
Published: September 2015

Digital-inclusion policy in the United States has historically emphasized home broadband access as both its policy priority and goal. Supplying households with broadband access may not do much to improve the ability of individuals to make meaningful use of the Internet, however, since it provides Internet access with little social context beyond the family. Drawing on Bourdieu's concepts of disposition, habitus, and multiple forms of capital, this paper endeavors to situate Internet use in its broader social context and explores the importance of institutional access, Internet use at work or school, in developing the dispositions and competencies needed to use the Internet in instrumental ways, such as applying for educational programs or communicating with governments. Through descriptive statistics, it identifies which segments of a US city lack institutional access, and, using multivariate analysis, it highlights the role institutional access plays in developing these abilities and its role in further inequality.
Digital Inclusion, Crowdfunding, and Crowdsourcing in Brazil
Authors: Bonami Beatrice , Tubio Maria Lujan
Published: September 2015

In the present chapter, we map and characterize crowdsourcing and crowdfunding platforms that promote social entrepreneurship in the online universe. We first analyze relevant theoretical concepts and the existing literature on entrepreneurship, digital inclusion, information and open culture, digital culture, and social technologies to better understand the genesis and development of initiatives that promote social entrepreneurship in the online universe. Then, we map and describe the platforms that tried to encourage this type of entrepreneurship around the world, especially in Brazil. Finally, we examine some important aspects of the panorama of crowdfunding in Brazil. By exploring the current development of crowdfunding and crowdsourcing platforms at international level, we expect to contribute to the creation of new projects and policies that respond to the current demands of the network society.
Critical Analysis of an Amazon Program of Digital Inclusion
Authors: Magalhães Waléria de Melo , Eliasquevici Marianne Kogut , Pinheiro Ferreira Benedito de Jesus
Published: September 2015

This chapter aims to present a study of the digital inclusion program of the Government of the State of Pará, named Navegapará, particularly its educational components within Infocenters of Belém. During the period from March to September of 2012, 26 schools were selected, along with certain teachers and directors from the schools. A questionnaire was applied to better characterize the sample of schools visited, and it was possible to carry out a critical analysis of the data obtained and verify the potential of the program, as well as to show some points that must be reviewed, such as providing good training for teachers and ensuring that equipment is in good condition. These are still valid data in that they provide fundamental indicators for the appropriate development of digital inclusion and educational informatics within the schools.
Informational Literacy as Key Element in Social and Digital Inclusion Policies in Mexico
Authors: Tarango Javier , Mireles-Cárdenas Celia
Published: September 2015

The social and digital inclusion, is currently one of the main concerns of developing countries and peripheral economies (as in the case of Mexico), whereas it is mainly characterized by low levels of information literacy of the general population, causing marked differences in digital, social and employment gaps. This chapter analyzes the problems of Mexico regarding the levels of use and access to information through ICT and its position as a country in relation to others. Furthermore, two fundamental questions of national development strategies in relation to information: a) the status of the general population (which indicates that only 43.5% have internet access) and b) the issues of low generation of knowledge and reliance on information consumption abroad. Finally studies the National Development Plan, questioning whether he truly believes inclusive and if alternative proposals have been raised only in the rhetoric of government documents.
Mobile Communications and the Entrepreneurial Revolution
Authors: Ramos Sergio , Armuña Cristina , Arenal Alberto , Ferrandis Jesús
Published: September 2015

It is commonly accepted that entrepreneurship is a key activity in the current economic context, and entrepreneurs create value in form of new businesses ventures, and generate new jobs by mobilizing economic resources, which in combination has a positive impact in terms of increasing productivity and economic growth, among other effects. In this chapter, the authors acknowledge the importance of innovation in the mobile industry driven by entrepreneurs and firms as a source of disruptive changes that have completely reshaped the world, by presenting the key elements of current mobile industry and the emerging areas with the highest potential to attract entrepreneurs in the upcoming years.
A Reflection on Wearables and Innovation in the Mobile Ecosystem
Authors: Castellet Andreu
Published: September 2015

This chapter explores the innovation landscape for the mobile content ecosystem building upon the hypothesis of the disruption potential of wearables. Google Glass is taken as the paradigm, as it offers direct access to network, becoming an eventual alternative to the smartphone. Equipment manufacturers lost traction as innovators right after the arrival of the iPhone in 2007, which brought a key innovation to the ecosystem. Observing the strategies of the different players operating in the supply side, two innovation scenarios are proposed for the debate: a sustaining-innovation based scenario, and a disruptive-innovation one. The main findings admit a clear disruption potential in wearables, mostly focused on the power of glasses as a driver to create a new wave of content, oriented towards augmented-reality features. However, it is still uncertain if these new devices can trigger a new era of innovation expanding its effects towards the whole ecosystem.
From Personal to Mobile Healthcare
Authors: Villalba-Mora Elena , Peinado Ignacio , Rodriguez-Mañas Leocadio
Published: September 2015

mHealth is an emerging field that comprises the delivery of health through mobile technologies, being part of a broader concept: eHealth. With the rapid advances and adoption of mobile technologies and applications, mHealth opens new opportunities to deliver healthcare and wellness promotion through personal mobiles. This will transform the current delivery of services linked to particular places to a delocalization and personalization of services delivery. Although the adoption and integration of mobile technologies is high across the globe, the particular adoption of mHealth remains low and scattered due to some remaining challenges. This chapter presents the current picture of mHealth and it later discusses the opportunities both at market level and with regards to healthcare delivery. Then, it presents future research directions as big data; and it closes with conclusions on this challenging emerging field.
Mobile Big Data
Authors: Aggarwal Shivom , Nayak Abhishek
Published: September 2015

Mobile technologies have given rise to tremendous amounts of data in real-time, which can be unstructured and uncertain. This growth can be attributed as Mobile Big Data and provides new challenges and opportunities for innovation. This chapter attempts to define the concept of Mobile Big Data, provide description of various sources of Mobile Big Data and discuss SWAI (Sources Warehousing Analytics Insights) model of Big Data processing. To understand this complex concept, it is important to visualize the Big Data ecosystem, respective players. Moreover, mobile computing, Internet of things, and other associated technologies have been discussed in light of marketing and communications based applications. The current trends in Mobile Big Data and associated value chain help us understand where the next frontiers of innovation are and how one can create value. This is linked to the future aspects of the Mobile Big Data and evolution of technologies from now onwards.
Driving Media Transformations
Authors: Aguado Juan Miguel , Martinez Inmaculada J.
Published: September 2015

The consolidation of the mobile ecosystem is deeply influencing the adaptation of traditional media industries to the digital transformations of business, consumption and audiences. Legacy media digitization comes along with a perfect storm where different kinds of crisis converge. This is also the ground where an eventual response to uncertainties about future may appear in the form of new opportunities and possibilities. Simultaneously, mobile content evolution brings forth a new habitus of consumption, an increasingly complex set of social rituals, content format syntax and technical requirements that constitute new consumption scenarios. This chapter aims at discussing a conceptual framework on how the techno-economic drift of the mobile ecosystem matches the evolution of content industries dynamics and content consumption scenarios in terms of dysfunctions and challenges. The theoretical ground is built upon the works from a three-year research project on the evolution of mobile content and the economic and sociocultural relevance of personal information management.
Mobile Journalism and Innovation
Authors: Palacios Marcos , Barbosa Suzana , Firmino da Silva Fernando , da Cunha Rodrigo
Published: September 2015

Using a qualitative methodological approach, this chapter brings to bear a theoretical and conceptual framework with particular consideration to the notions of innovation, journalistic convergence, design and the theory of affordances, as well as mobile communication and mobile journalism. This analysis covers the period 2010-2014 and seeks to examine the specific affordances, the structure, organization and types of narratives produced; the design and use of multimedia features as well as the level of integration with other products in the same news organization. The empirical corpus consists of products selected for their representativeness within a broader sample: O Globo a Mais, Estadão Noite, and Diário do Nordeste Plus (Brazil), La Repubblica Sera (Italy), La Presse+ (Canada) and El Mundo de la Tarde (Spain). The study concludes that - although timid - experimentation continues to prevail regarding formats, content, language and narratives based on the features of mobile devices, the continuous evolution of operating systems and changes in hardware platforms.
Mobile Content and Walking Documentary
Authors: Adam Frédéric
Published: September 2015

This chapter presents creative strategies to teach Science using Smartphones and focuses on projects by researchers and teachers from the international “Big History” network. They teach scientific based knowledge from a cosmic point of view starting from the theory of the Big Bang. A large number of contributors believe that connecting learning to the physical, natural world is the key to stimulating the interest of students before studying the theory in the classroom. This is where Mobile Content is invaluable. A general selection of interesting outdoor learning projects are presented, together with experimental, hypermedia creations achieved by the author in collaboration with scientists. The original concept of a “Walking Documentary” is advanced as a way for students to experience large scales of space and time by walking with a smartphone synchronized with every step of the walker. Finally, some emerging technologies are mentioned, announcing new ways to teach and learn Science with technology.
LiveWell – Promoting Healthy Living and Wellbeing for Parkinson Patients through Social Network and ICT Training
Authors: Boulos Maged N. Kamel , Ifeachor Emmanuel , Escudero Javier , Zhao Peng , Carroll Camille , Costa Pedro , Doppler Gerhard , Marín Laura Carrasco , Spiru Luiza , Guðmundsdótti Kristin Helga , Kosem Marija
Published: September 2015

About 1.2 million people in Europe have Parkinson's disease (PD). PD patients often suffer from social exclusion and depression due to progressive lack of control over the disease. Eventually, most require constant care, leading to huge socioeconomic burdens. To partially tackle this issue, 7 partners in 7 countries participated in LiveWell (EU-funded project, 2012-14) to develop an innovative Web-based education, training and social community platform targeting PD patients, carers and clinicians. This paper describes LiveWell from conception to completion, presents lessons learnt over the course of the project, and highlights some identified main areas of best practice. The Project Consortium might not have had the chance to implement everything learnt in the current outputs, but these lessons and guidelines can be later used to improve LiveWell, and can also be generalised to benefit similar e-health services. The combination of appropriate online education and social communities could help patients and carers cope positively with PD, promoting social inclusion and better outcomes.
Experimental Study on the Ground Resistance Reduction Based on Different Types of Grounding Rod
Authors: Ahmad Arfah , Azily Ahmad Tarmizi , Ramani Anis Niza , Wan Abdul Razak Intan Azmira , Ahmad Suziana
Published: September 2015

Grounding of electrical installation is primarily concerned with ensuring safety. The main purpose of grounding is to channel the fault current straightly to the earth. To produce a good grounding system, the value of earth resistance must be reduced as low as possible. Otherwise, current may flows through to those who touch the damage electrical equipment instead of flowing through grounding system. In this project, a 3 meter length of copper, galvanized iron and pure steel rod were installed in formatting of grounding system. The installation of the grounding rods was based on the fall of potential method. Both single rod testing and parallel rod testing were performed in this project. A comparison on grounding resistance value for copper rod, steel rod and galvanized iron rod was examined and the selection of the best grounding rod was determined from the experimental data. Result shows that different types of rod will produce different value of resistivity in which depend on installation technique and soil condition.
Frequency Response as Tuning of Power System Stabilizer on Rotor Speed Dynamic Stability
Authors: Irwanto Muhammad , Murina Murina , Gomesh N. , Gomesh N. , Mamat M.R. , Isa Muzamir , Malek F.
Published: September 2015

Power system stability is the ability of an electric power system unit, for giving operating conditions beginning to recover operating state of equilibrium after being subjected to a physical interference. Power system stability has been recognized as an important problem for safe operation of system unit. Stability of power system is similar to the stability of any dynamic system, and has basic mathematical. Concepts from the mathematics and theoretical stability control are first revised to provide background information related to stability of dynamic system generally and establish a connection theoretical. This paper presents to improve of dynamic power system stability using frequency response as tuning of system stabilizer. It is started by electrical power systems mathematic modeling in state variable equation then set the expertise function of frequency response as tuning of system stabilizer. The plant controlled by function of frequency response is tuned to left half plane (LHP) as system stabilizer which their input from the rotor speed. When the system occur fault, the rotor speed should be synchronized, for this case one electrical controller is needed to make sure the system is stable.
Formation and Effect of Moisture Contents to Kraft Paper’s Life of In-Service Power Distribution Transformer
Authors: Sutan Chairul Imran , Md Thayoob Yasmin Hanum , Yang Ghazali Young Zaidey , Ahmad Khiar Mohd Shahril , Ab Ghani Sharin
Published: September 2015

Examples of solid and liquid electrical insulations for power transformer are mineral oil and cellulose based paper. As transformers performed their function to step-up or step-down voltage level, its’ insulations will be degraded. Paper insulation is considered the most critical component in a transformer insulation system because it is not easily replaced if compared to oil where it is easily reconditioned in-order to remove water and contaminants. Studies show that temperature, moisture contents and oxygen contributed to paper insulation degradation. Moisture and furanic compound were produced from these deterioration processes. This paper is focused on the formation and effect of moisture to Kraft paper’s life. Levels of moisture contents were obtained from in-service power distribution transformers. These data then is used to assess the Kraft paper’s life by means of Weibull plot. This study shows that level of moisture contents can be used to assess the life of Kraft paper insulation.
Early Warning for DC Power Failure System
Authors: Hussain Abadal Salam T. , Dahham Israa A. , Malek F. , Jeflawi Qais H. , Mahmoud Jailani O. , Abdullah Ahmad Zaidi , Irwanto Misrun Muhammad , Shasidharan Gomesh Nair , Yusoff Mohd Irwan , Taha Taha A.
Published: September 2015

Electrical systems and devices suffer from unexpected failures due to various reasons such as input voltage fluctuation and low or high voltages. This paper discussedabout the development of a device for detecting imminent failure of electric products such as refrigerators, ovens, Air-conditions and etc. The main objective of this developed preventive device is todetect voltage drop or rise and produce an alarmsignal to enable and activates other protection circuitry.The mechanismof the detector/sensing circuit is based on differentiating the voltage level using dualcomparator; this makes the system more considerate. The method enables real-time monitoring of stability boundaries and the corresponding margin to the observed operating point, which is used to provide an early warning for emerging stability problems.
Permanent Magnet Synchronous Generator Based Standalone Wave Power Conversion System for Sustainable Power Supply at Perhentian Island
Authors: Ahmad Norhafizan , Samrat Nahidul Hoque , Choudhury Imtiaz Ahmed , Taha Zahari
Published: September 2015

In developing country like Malaysia, the development of islands is mostly related to the electric power availability. Because there are many islands in Malaysia where the power grid is not available. As an island surrounded by sea, wave energy can be considered one of the environmental friendly power generating sources for island communities. But, high dependency on weather conditions is the main drawback of wave energy source. To overcome this drawback; wave energy device, energy storage devices and the electronic converters need to be integrated with each other. This study presents a battery storage standalone oscillating water column wave energy conversion system for island electrification in Malaysia
Characterization Preliminary Breakdown in the Measured Lightning Electric Fields on Malaysia Data
Authors: Arshad S.N.M. , Ab Kadir Mohd Zainal Abidin , Izadi Mahdi , Ariffen A.M. , Hamzah M.N. , Gomes Chandima , Jasni J. , Rameli Norhidayu
Published: September 2015

This paper presents a characteristic of lightning electric fields. The lightning electric fields were captured by two parallel plats sensor and the characterization for preliminary breakdown pulse (PBP) was studied. A total of 207 data were recorded and 10 data are selected and been utilized in this paper accordingly. In PBP signal data, time before return stroke, ending time and maximum peak of PBP were analyzed. The time duration between the PBP and the occurrence of return stroke was obtained as 0.64 ms and 4.05 ms and then compared with results from other researchers.
Palm Oil as the Cooling Liquid in Single Phase Transformer for Better Efficiency
Authors: Zaidi A.A.H. , Hussin Nuriziani , Maizana Dina
Published: September 2015

The important purpose of mineral oil in transformer is to be insulant and it is role of being a coolant. Petroleum based oil is commonly used because it has a good dielectric strength and cooling performance. However, the application of mineral oil brings negative impact to the environment such as oil spills, leakage, explosion and soon petroleum based oil will be running out for future generation used. Thus, vegetable oil is chosen as an alternative to replace mineral oil for transformer insulation liquid. Formerly, most of Malaysian researches were focusing on the properties of the vegetable oils rather than investigate the effect on the transformer performances after the vegetable oils are applied. Hence, this paper focuses on the performance of the transformer before and after vegetable oils are applied. For this paper, refined palm oil is used as insulation liquid for a single-phase step down transformer which use the 220 V supply and 50 Hz frequency. Transformer is connected to 110V induction motor as load and has been test in two conditions, dry and after palm oil is applied. Comparison is made from both results and clearly shown a good improvement when palm oil is used as insulation oil.
Harmonics Performances of Single Phase Transformer due to DC Bias
Authors: Hasan Syafruddin , Isa Muzammir , Roslan M.A. , Hafizi M. , Musdar D. , Hardi Surya , Fitra M.
Published: September 2015

The investigation of the direct current (dc) bias effect on single phase power transformer through their harmonics performance is present in this paper. The experimental study is done by the dc bias current injected simultaneously with alternating current (ac) source to primary winding of transformer. The input ac voltage to primary winding is maintained constant during investigation and the dc currents increased gradually. Compare to pure ac power applied, the results show that the waveforms distorted when the dc bias exist. The pulsated waveforms are pushed to half cycle in which the bias current is in the same direction as magnetizing current (unsymmetrical pulsated) and even harmonics are significant.
Elimination of Lower Order Harmonics in Seven-Level Cascaded Inverters
Authors: Ismail Baharuddin , Syed Hassan Syed Idris , Ismail Rizalafande , Azmi Azralmukmin
Published: September 2015

This paper deals with an elimination of lower order harmonics in the seven - level cascaded inverters. The main objective of selective harmonic elimination pulse width modulation strategy is eliminating lower order harmonic by solving nonlinear equations, while the fundamental component is satisfied. In this paper, the Particle Swarm Optimization (PSO) is applied to a seven-level inverter for solving the nonlinear equation. With the proposed approach, the required switching angles are computed efficiently by PSO algorithm. Lower order harmonics up to the 7th are eliminated. Simulation results verify the proposed method.
Mathematical Formulation of Multilevel Voltage Source Inverter Switching Instants
Authors: Ismail Mohd Alif , Fadzail Noor Fazliana
Published: September 2015

Modular structured multilevel inverter is very useful for electrical application especially in high power and high voltage applications. The main function of this multilevel inverter is to produce multilevel AC output voltage from several separate DC sources. This project is to derive a new mathematical formulation of multilevel voltage source inverter switching instants. The proposed method for this project is based on the sinusoidal natural sampling PWM (SPWM) by comparing several modified modulation signal with a triangular carrier signal. This resulting intersection points between this modulation and carrier signal become the switching instants of the PWM pulses. Derivation also based on Phase opposition disposition (POD). A cascaded multilevel inverter is selected as a topology for this project due to major advantages compare with other topology. The derived formula is analyzed by using MATLAB simulation software. It is found that the results that use the derived formula are almost identical to simulation result.
Laboratory Test of Current Transformer Operates under Harmonic Conditions
Authors: Nisja Indra , Abdullah A.Z. , Masri S. , Hardi S.
Published: September 2015

This research focused on the effect of harmonic to the performance of current transformer (CT) operates under harmonic conditions. Due to the increasing of harmonic in power system, the CT did not perform well. The CT may saturates due to the presence of voltage and current harmonics. In this project, a laboratory test was conducted to investigate and analyze the influence of harmonics to the CT performance. This CT has been test with different Total Harmonic Distortion Current (THDi) at primary side and constant primary current. The experiment result shows the secondary current CT errors will increases when THDi increases.
A Soft Switching Full-Bridge DC-DC Converter with Active Auxiliary Circuit
Authors: Charin Chanuri , Mohamed Yusof Nur Fairuz , Mazlan Mazwin , Adb Rahman Noor Haqkimi
Published: September 2015

DC-DC converters are widely used in many applications such as power supplies, PV system, renewable energy systems and industrial applications. One of the main problems in dc-dc converters is the switching loss which affects efficiency and also the power density of the converter. To alleviate the switching loss problem this paper proposes novel soft switching PWM isolated dc-dc converters topology. The proposed full bridge dc-dc converter with active auxiliary circuit is designed and tested with full-bridge rectifier diode. The proposed converter is designed and evaluated in term of soft switching. In the proposed topology, the soft switching operations are achieved by charging and discharging process of the capacitor and additional switches. In the proposed topology, all the power switches operate under soft-switching conditions. Therefore, the overall switching loss of the power switches is greatly reduced. The output voltage of the converter is varied by PWM control. The effectiveness of the new converter topology is evaluated by experimental results of a laboratory scale down prototype. The obtained experimental results are found agreed with theoretical and soft switching is achieved.
Energy Meter Monitoring with Automatic Tariff Calculation
Authors: Anida Noor , Amirah A , Othman Mardianaliza , Razali Noor Ashikin Mohd , Malik Fareq , Abdullah F.S. , Yusof A.
Published: September 2015

Energy meter monitoring with automatic tariff calculation is a project that can produce the output from energy meter to prepare a bill of electricity. Energy meter is a device that measure the amount of electric energy consumed. In Malaysia, the meter of Tenaga Nasional Berhad (TNB) travels for a long distance and take the reading manually to prepare the bill by visiting inside each of consumer house. This is high dependent on human forces. Sometimes the absence of consumer during billing process visiting make difficult to the meter reader to get the reader. Moreover many consumers are not satisfied with the estimate bills which are calculated based on average consumption. Soaring bill by estimate bills of electricity which consumer have to pay extra for the electricity billing. By using microcontroller and radio frequency transmitter for remote monitoring, the meter reader do not have to travel anymore. Global System for Mobile (GSM) uses to transmit and receive data from energy meter. The output which is calculated bill will be shown at Liquid Crystal Display (LCD) after apply the program coding in the microcontroller.
The Electric Field Effect on Angles of Copper-Type Down-Conductor
Authors: Ariffen A.M. , Ab-Kadir M.Z.A. , Gomes C. , Jasni J. , Arshad S.N.M.
Published: September 2015

This paper is to study the effect of electric field on an angle variation of copper down-conductor due to voltage and current transient. Down-conductor which informs of numerous material, shape and dimension are mandatory for diverting the lightning current from air termination system to the grounding system in sheltered building. Hence, a numerical analysis method is applied emulating the comprehensible and particular model according to ordinarily used in the manufacturer’s datasheet specification. A rigorous assessment in term of electric fields was reviewed in comparison with the critical breakdown value of air for a crucial study. Later, a foremost angle is proposed for the installation of down-conductor in order to achieve a reliable protection system.
Survey of Droop Control Technique for Parallel Inverter Operation
Authors: Roslan M.A. , Hasan Syafruddin , Hardi Surya , Nisja Indra
Published: September 2015

Increasing demand for large-scale power delivery with high reliability and quality necessitates the use of multiple distributed energy resources to be connected in parallel; for example, parallel inverters operation. Proper operation of parallel inverters requires sophisticated control techniques and many have been proposed and continue to evolve. This paper depicts the droop control techniques for the parallel inverter systems. The recent improvements and variants of this control technique are presented
Effects of Different Voltage Sag Types on Induction Motor
Authors: Hardi Surya , Hafizi Muhd. , Isa Muzamir , Masri Syafrudin , bin Ruslan Mohd Azrik , Hasan Syafruddin , Nisja I.
Published: September 2015

This paper analyzes effects caused by voltage sag types A, B, C and D on induction motor based on experimental test. The effect can be investigated in term the current peaks and speed variation. The magnitudes depend on magnitude of sag and duration, voltage sag types, during and recovery voltage sag. Several of voltage sag characteristics have been conducted in different magnitude, duration and sag types. The results show that the current peaks generated reach more than 4 times of normal current and it was achieved at recovery voltage instant. Sag magnitude has great influence on the current peak but sag duration is not significantly. Type A voltage sag only can cause the motor stop running and it was achieved when it was subjected to sag magnitude of 10% and 6s in duration. The motor stops running in shorter duration when it was subjected to interruption with sag duration of 4s. Therefore voltage sag of type A lead to more severe on induction motor if compared with other sag type. This is according to number of phase that experience sag. The magnitude and duration of voltage sags have influenced significantly on the motor speed only for low sag magnitude and long sag duration.
A Single-Stage Square Wave Buck-Boost Inverter
Authors: Soo J.A. , Rahman N.A. , Leong J.H.
Published: September 2015

This paper proposed a novel single-stage square wave buck-boost inverter (SWBBI). The proposed inverter is designed by using dual buck-boost converters. The input DC voltage of the proposed inverter can be either stepped-down or stepped-up in square output voltage waveform depending on the duty-cycle applied for each buck-boost converter. This characteristic is not found in conventional voltage source inverter where the output voltage is always lower than the input DC voltage. The proposed inverter is analyzed by a series of simulations using MATLAB/Simulink as well as experiments by using different values of duty-cycle. A conclusion about the feasibility of the proposed inverter is given by comparing the simulation and experimental results.
Review Compact Microwave Filter for Harmonic Rejection
Authors: Fang Liew Hui , Hassan Syed Idris Syed , Malek Fareq , Wahab Yufridin , Mohd Mukhtar Nurhakimah
Published: September 2015

An investigation of the several different techniques and method have been suggested in the design of compact microwave filters for the realization of high performance output micromachined microstrip low pass filters and highest attenuation loss is presented in this paper. It is shown that the basis for much fundamental microwave filter theory lies in the real of lumped-element filters, which lumped elements suffers for not suitable use in high frequency, because wavelength will decrease to short and the only distributed elements can practically well and the lumped elements circuit and work efficiently at low frequency or vice versa wavelength of distributed elements become too larger. In this paper, a review of numerous methods of design compact microstrip filters that have been offered over the last years is proposed, including a discussion of topologies and the structures used to make compactness size of microwave filters.
Improvement of Dynamic Electrical Power System Stability Using Riccati Matrix Method
Authors: Irwanto M. , Norfadilah Norfadilah , Gomesh N. , Irwan M. , Mamat M.R.
Published: September 2015

Power system stability means the ability to develop restoring forces equal to or greater than the disturbing forces to maintain the state of equilibrium. Successful operation of a power system depends largely on providing reliable and uninterrupted service to the loads by the power utility. The stability of the power system is concerned with the behavior of the synchronous machines after they have been disturbed. If the disturbance does not involve any net change in power, the machines should return to their original state. Due to small disturbances, power system experience these poorly damped low frequency oscillations. The dynamic stability of power systems are also affected by these low frequency oscillations. This paper presents to analyze and obtain the optimum gain for damping oscillation in SMIB by using Riccati matrix method to improve dynamic power system stability. The result shows that with suitable gain which is act as a stabilizer that taken from Riccati matrix, the oscillations of rotor speed and rotor angle can be well damped and hence the system stability is enhanced.
Simulation Assessment of the Existing KTMB Klang Valley 25kV Traction Power System Adequacy to Support the New 6-Car Train with Shorter Headway Commuter Service Operation
Authors: Ismail Amir Basha , Mohd Sultan Azirinda , Yusoff Mohd Asri
Published: September 2015

In 2012, KTMB launched a new fleet of China-made 6-car electric multiple units (EMUs) to augment their existing 3-car EMUs, the objective being to expand the capacity of its Klang Valley train commuter service from 33,000 to 95,000 passengers during the morning and afternoon peak hours. Due to significant expansion in train traffic density, it was essential to investigate whether the existing 25kV overhead centenary system (OCS) electrical network infrastructure could support the ensuing electrical power demands/loads due to the additional tractive effort of the 6-car trains and increased train traffic density. Traction power simulation study using MM-TRAIN software was conducted for this purpose. This paper illustrates the indispensable tool of traction power simulation software to access the performance of moving rail traction loads under normal (no outage) and under first emergency feeding conditions (n-1 outage contingency)
Microcontroller-Based HEPWM Cascaded H-Bridge Multilevel Inverter System for Renewable Energy Application
Authors: Azli Naziha Ahmad , Mohd Nayan Norkharziana , Md Ayob Shahrin , Abdullah Ami Nurul Nazifah , Mazalan Siti Khodijah
Published: September 2015

This paper presents the implementation of a microcontroller-based Harmonic Elimination PWM (HEPWM) switching scheme of a Cascaded H-Bridge Multilevel Inverter (CHMI) for renewable energy system. This technique applies Particle Swarm Optimization (PSO) technique to allow computation of HEPWM switching angles. The detail description on the microcontroller-based implementation is provided in this paper. The performance of CHMI employing the control strategy based-on the simulation and experimental results are shown for comparison purposes.
Performance of Distributed Generation (DG) towards Dynamic Voltage Restorer (DVR) in Mitigating Voltage Dips
Authors: Amirruddin Melaty , Idris Muhd Hafizi , Hana A.H. , Noorpi N.S. , Mardianaliza O. , Nurhakimah M.M.
Published: September 2015

This article presents the performance of Distributed Generation (DG) towards Dynamic Voltage Restorer (DVR) in mitigating voltage dips. An investigation was conducted to explore the effect of DG with the test system and the results will be analyzed during line to ground fault with DVR contains DG and without DG. The percentages of the voltage dips that occur will be compared between all the test systems. From this analysis of voltage dips percentage, the effectiveness of the DG towards DVR in mitigating voltage dips can be obtained clearly. The simulation of the test system will be done using Power System Computer Aided Design (PSCAD) software.
Simulation of Three Levels Single Phase Inverter Using Proteus Software
Authors: Zhafarina M. , Irwanto M. , Haziah A.H. , Gomesh N. , Irwan Y.M. , Mamat M.R. , Fareq M.
Published: September 2015

Photovoltaic is use to supply electricity from sunlight. Inverter is used to convert the direct current (DC) from photovoltaic to alternating current (AC). This project is to design and develop a single phase inverter that able to invert the input voltage of DC to output voltage of AC using PROTEUS software. The inverter based on 8 bits for one cycle of a driver pulse wave. This simulation used before doing the hardware. This software can save a lot of time on this exact simulation of the prototype.
Consideration of Lightning Current along a Tall Structure in the Presence of Horizontal Arrangement Grounding
Authors: Rameli Norhidayu , Ab Kadir Mohd Zainal Abidin , Izadi Mahdi , Gomes Chandima , Azis Norhafiz , Arshad S.N.M.
Published: September 2015

The evaluation of the behaviour of lightning current along a tall structure is becoming an important issue when considering the lightning protection equipment required along a tall structure. This behaviour is affected by the element of the ground reflection factor which has a correlation between the impedance of the ground and the tower. The impedance of the ground is considered for a horizontal grounding arrangement while the impedance of the tower is assumed to be constant. Hence, the ground reflection factor can be given a variable value, whereas most of the existing literature assumes a constant value. When a constant value is entered into a calculation field, an inaccurate result is computed.In this paper, the lightning current along a tall structure under varying values of ground reflection factor and including the effect of the presence of a horizontal grounding arrangement has been considered and the results discussed accordingly. Modelling of the lightning return stroke current along a tall structure was undertaken by entering the calculated variable value of the ground reflection factor. The results indicated that a variable value of the ground reflection factor causes different peak values of the current and wave shape of the lightning current for different positions along a tall structure.
Simulation of Microcontroller Based Perturb and Observe MPPT Controller for Photovoltaic Energy Applications
Authors: bin Fazil Rahman Ahmad Shukri , bin Abdul Razak Abdul Rahim , bin Syed Hassan Syed Idris
Published: September 2015

This paper demonstrates the implementation of P&O MPPT controller. The proposed controller was written and compiled in mikroC and later incorporated to a low cost PIC18F4550 microcontroller. Open loop simulation using Proteus Isis was conducted to test the effectiveness of the proposed algorithm. Results obtained from simulation proved the effectiveness of the proposed controller making it suitable for hardware implementation.
Electrical Characteristics of Photovoltaic Cell Module by Simulation
Authors: Dolah Asban , Wahab Yussof , Abd Ghani Rasli , Yusof Ashaari , Ngah Nor Azhadi , Muhammad Norman Fadhil Idham
Published: September 2015

This paper emphasizes on the model verification of the electrical performance of a Photovoltaic (PV) cell module by MATLAB/Simulink simulation. The developed model can then be used to predict the PV cell behavior under different physical and environmental parameters such as solar irradiation, ambient temperature, series resistor, shunt resistor, diode saturation current and cell arrangement. Photovoltaic cell model is used for comparing the electrical characteristics for this modeling process. Kyocera PV module is used as the module specification, whereby a PV model can be easily generalized to predict the output current, power characteristics and the maximum power point tracking.