bluuebunny/crossref_metadata_2025 huggingface dataset:
Experience as Textbook
Authors: Treadwell Katie L. , Mitra Brian R.
Published: August 2015

This chapter explores how experiential learning opportunities, specifically service-learning, foster career exploration, development of transferable skills, and readiness for employment and/or higher education among community college students. By drawing upon experiences leading service-learning opportunities, career development, faculty partnerships, and leadership development at urban community colleges, the authors present an approach to community college education rooted in experiential learning. The chapter proposes the use of Usher, Bryant, and Johnston's model of learning from experience to develop students' vocational practices and help “learners become more empowered to respond to their changing vocational environments” (Merriam, Caffarella, & Baumgartner, 2007, p. 68). These impacts are illustrated through the programs and student voices of a community college recognized for its service-learning opportunities. Colleges and corporations share responsibility to prepare citizens (Holton, 1998). Community colleges must take the lead in developing these partnerships and designing learning environments that benefit students and community, in turn creating a next-generation workforce.
Flying SOLO for Student Success
Authors: Mitchell Regina L. Garza , Cano-Monreal Gina L.
Published: August 2015

This chapter describes how one innovative practice evolved to become an integral part of the college's efforts to increase student preparedness and success in courses so that they will be employable and competitive in the global workforce. Texas State Technical College Harlingen aimed to enhance student success in online education through implementing a mandatory class, Student Online Learning Orientation, for new online students. The course was developed as the result of faculty research and recommendations regarding online learning at the college. The majority of students at the college are underprepared and from low socioeconomic backgrounds, putting them at a disadvantage in taking these courses. Rather than a barrier to taking online classes, the goal of this class is to provide students with the necessary tools and skills to be successful. Results of the program show an increase in persistence and completion of online courses, and the course has become an integral part of the college's training and first-year experience for all students.
The Roots of Trance
Authors: Smith Peter
Published: August 2015

This chapter explores the roots of trance by taking a reflective and historical view of the influences of 1970s and 1980s music on the development of trance. The author reflects on concerts which he personally attended, analysing them for music, lyrics, style, performance, and concepts which formed the roots of trance. This includes performances from the following genres: space rock, psychedelia, Krautrock, and post punk. The chapter discusses performances by the Grateful Dead, Pink Floyd, Arthur Brown, The Edgar Broughton Band, Kraftwerk, Joy Division, and Public Image Limited. In each case those elements which have contributed to the development of trance are highlighted.
Requirements of a Digital Platform for Psytrance Parties
Authors: Tenreiro de Magalhães Sérgio
Published: August 2015

Digital platforms that support virtual worlds are becoming more complex and there is a growing fusion between real life and digital objects. Wireless technologies, screens' resolution and colours, 3D technologies, virtual and augmented reality can change the way a user experiences a virtual environment. This chapter explores input and output technologies for computing devices and discusses the technological developments that constitute requirements for the success of non-physical trance parties or, as some would prefer to call them, virtual trance parties.
The Paradox of Self in the Imagination of Goa Trance
Authors: Constança Sara
Published: August 2015

This chapter deals with the first part of the investigation in regards to the experience of self in the Goa Trance dance-floor. The author analyzes the paradox of self in a phenomenological scope without going to deep into philosophic concepts but deep enough to give a sufficient basis to understand the arguments of the next chapter with same title and different subtitle. After dealing with the self, a notion of what is that we call real is then put forward within a framework from the Portuguese poet Teixeira de Pascoaes. This will also be in the context of an analyses of the Pythagorean tetractys in order to understand what can be said that is or is not existence in a conceptual stand point. This will set forward the necessary basis for understanding what is happening with the pure trancer in the Goa Trance dance-floor.
Pushing the Boundaries
Authors: Vitos Botond
Published: August 2015

Based on ethnographic fieldwork conducted in the Melbourne psytrance scene, this chapter addresses the musical and social aesthetics of the dark psytrance (darkpsy) electronic dance music subgenre and its furious dance floors. The interviewees of my research often regard psytrance tracks as the musical transpositions of psychedelic drug – particularly LSD – experiences. Dark psytrance can be considered the hard core of psytrance, sending its LSD-infused musical structures into overdrive. Regarded as the flagship in the evolution of psytrance by fans and considered to be uncomfortably or even menacingly intensive by others, darkpsy follows the basic imperative of becoming increasingly faster and adopting more abstract forms of expression, destabilising rigid boundaries and catapulting the listener into a zone of the unknown. Such dissolution of meaning is celebrated on dance floors of high intensity, where psychedelic music and drug become integral parts of a media ecology that is aimed at the presentation of the unpresentable.
Cross-Cultural Affordances of Digital Storytelling
Authors: Kozdras Deborah , Joseph Christine , Kozdras Karen
Published: August 2015

In this chapter, the authors consider the use of digital storytelling as a tool for boundary crossing. Media, as an extension of self, has potential to help cross-cultural learning that benefits all stakeholders, but specifically, immigrants and English Language Learners, who often experience school literacy challenges. The authors used Cultural Historical Activity Theory (CHAT) as a lens to view two teacher case self-studies, one in Canada and one in the U.S.A., and to examine how their use of digital storytelling helped elementary ELL students to learn the language of school as well as transfer their knowledge to other students and educators. The findings indicated the importance of creating avenues through which immigrant English learners can develop interpersonal communication skills critical to being successful across cultures. Through an analysis of the cases, the authors present language learning implications for educators.
Exploring the Interstices of Literate, Linguistic, and Cultural Diversity
Authors: Smith Patriann , Kumi-Yeboah Alex
Published: August 2015

In this chapter, we examine an English-speaking Caribbean multilingual teacher's response to linguistic diversity by exploring his linguistic and literate experiences and responses to language in various geographical and social contexts. Through in-depth semi-structured topical interviews, we identified three distinct recursive “pathways” representative of the teacher's experiences. These pathways constituted his processes of attitude transformation, strategy use, and identity formation. The findings highlight the need for further exploration of multilingual teachers' linguistic diversity and indicate the need to examine teachers' capacity to respond to linguistic and cultural diversity based on their personal experiences.
Diversity and Teacher Education
Authors: Zhou Molly Y.
Published: August 2015

Teachers' knowledge and skills in working with students of diverse backgrounds depend largely on their knowledge of ethnic groups and appreciation of culture and language differences. This chapter examined preservice teachers' preparation for diversity in a teacher education program at a university in southeastern United States. Study participants were preservice teachers enrolled in an education course in the school of education at the said university. Thirty preservice teachers' semester long reflections from a diversity education course were collected and analyzed. Two questions guided the discussion of the chapter: 1) What was the learning experience of preservice teachers in the course? 2) What was the collective conscience of preservice teachers on teaching students in increasingly diverse classrooms? The findings revealed that the course experiences facilitated preservice teachers' critical thinking skills on history, cultural identity, family and language difference, ethnic experiences. Implications on diversity in education were discussed.
Fostering True Literacy in the Commonwealth Caribbean
Authors: Warrican S. Joel
Published: August 2015

This chapter takes a close look at literacy in the Commonwealth Caribbean and explores factors that contribute to its status in the region. It links the current state of literacy to historical roots of education and relates it to other educational phenomena such as democracy in education, universal secondary education and technology in education. It argues that the current reported literacy rates for the region may be misleading as evidence suggests that for years, many students have been leaving school with insufficient literacy skills. The chapter proposes that the disconnect between the home or out-of-school culture of students and the academic/school culture contributes to poor literacy development which disempowers young people, especially males. It reports on what is being done to promote literacy in the region and concludes by sharing a vision of the way forward.
Critical Bilingual Leadership for Emergent Bilingual Students
Authors: Wiemelt Joseph
Published: August 2015

The overarching goal of this chapter is to examine and understand the role that school leadership plays in fostering the educational space where language and literacy development are central to the vision of a school community for emergent bilingual students. With this in mind, traditional school leadership theory and practice are insufficient to truly foster the culturally and linguistically responsive schools that are needed for emergent bilingual students. Therefore, this chapter presents critical bilingual leadership theory as an innovative conceptual framework aimed at answering this challenge. Drawing from transformative leadership and Latin@ critical race theory, this framework situates the role of equity-oriented leadership in the context of fostering language and literacy development for emergent bilingual students.
Learning Arabic through Language of Journalism
Authors: El-Falaky Mai Samir
Published: August 2015

Second language learning requires more than memorizing rules and vocabulary detached from contexts. Language teachers have to encourage the exposure to real context to enable their students to ‘acquire' the language in the same way they acquire their first language. This could entail an unconscious induction called ‘analogy'. Analogy may enable language learners to create neologisms for the purpose of communicating. This could also enable them to obtain a better understanding of lexical items in context. This chapter highlights the benefits of direct exposure to neologisms in journalistic texts, which influences learners' morphological choice. Mass media in general and journalism in particular are thought to be a perfect means of learning any language in its natural context.
Analysis of Surge Curve of a Sintered Exhauster Based on Site Tests
Authors: Ye Wei Jun , Shao Yi Min , Deng Wei , Deng Xiao , Fu Bin , Zhu Xin Cai
Published: August 2015

The surge of a sintered exhauster is regarded as a safety hazard during production. The occasional machine shutdown may be caused by the exhauster surge. Severe surge my cause the damages of the exhauster, injuries to personnel, and potentially casualties. In this paper, a curve that describes the character of a sintered exhauster is presented based on the site testing and analysis. The aim of this work is to avoid exhauster surge and to guarantee safe production. The working conditions for technicians and efficiency of operations for the exhauster will be insured through the use of the characteristic curve presented in the paper.
Research on Ram Air Turbine Blade Properties
Authors: Wang Jian , Lu Yue Liang , Zhai Xiao Tian
Published: August 2015

The Ram Air Turbine system is the emergency power system of aircraft. As the key parts, the blades aerodynamic characteristic effects the system properties. In this article, CFD numerical method will be used to research four blades properties of ram air turbine. We compare the blades work properties of each working condition, so that we can get which design is better. We used the CFD numerical method to design the RAT blade, we hope this method will be used in our future products design.
The Formation Mechanism and Simulation of Micro Bubble in Multi-Phases Flow in Mesoscopic Scale
Authors: Long Wei , Ling Zai Shuai
Published: August 2015

The dissolution mechanism of air and formation mechanism of bubble in the scopic-scale Be based on VOF model,with the help of Fluent software,For the single bubble rising in the water by numerical simulation;The results show that liquid phase flow state is a key factor affecting the speed of the bubbles rise;Pressure difference is the main reason cause the jets and bubbles deformation.
Distributed Embedded Control Architecture of a Leader-Follower Mobile Robot Formation
Authors: Li Ran , Li Yun Hua
Published: August 2015

Mobile robots have been widely used for the good adaptability, payload capability. Robot cooperation brings benefits for the task in a multi-robot team. In this paper, the modular hardware design of a leader-follower mobile robot team is discussed, including the distributed control architecture and the electronic system of each robot of the team. The basic idea behind this paper is to introduce the design of the hardware and distributed control architecture, which mainly manages the distributed control system, consisting of microcontroller modules connected through a data bus. The research has a potential applying prospect in mobile robot tracing and locating in the future.
Research on Fuzzy Control of MR (Magneto-Rheological) Damper for Landing Gear Based on FuzzyTECH
Authors: Zhu Shi Xing , Li Jian , Wang Bo
Published: August 2015

The semi-active control of MR damper is established, using a simplified model of landing gear system and DSP2812 as the code control board. The fuzzy control system is created based on software fuzzyTECH and simulation mode was established in matlab\simulink. Compared with passive control, the fuzzy control damping effect of the aircraft body vertical acceleration, body relative displacement and wheel dynamic load at different moments in the process of plane's taking off and landing. Software fuzzyTECH platform can generate the corresponding code for the DSP controller, applied directly to the fuzzy control system design and debugging, and shorten the development cycle of fuzzy algorithm control. Passive control and fuzzy control test are carried out on the landing gear vibration test platform. The results show that the application of fuzzy algorithm controller has higher adaptability and more real-time control effect, fuzzy control is better than passive control.
Position and Speed Double Closed Loop Control Performance of Electro-Hydraulic Actuator System Research Based on AMESim
Authors: Hu Jing , Liu Ming , Li Wei
Published: August 2015

In the paper, we research on a preparatory electro-hydraulic actuator product, using the simulation software AMESim to research work to analyze the system performance. We research position in closed loop servo actuator system, generally only considered the requirements of the position. While the speed trajectory and precision control did not do high demand. The position of the system by increasing the speed control strategy module, the system meets the requirements of the position. At the same time, we can achieve speeds start-up operation, stable operation and stopped operation of the three phases according to the requirement following a given trajectory; simultaneously can carry out detailed system performance analysis and research. Simulation results show that increasing position speed control strategy module of the system get very good effect. It can realize the speed control system and satisfy the system output displacement and speed steady-state performance and dynamic response.
Research and Simulation of Fuzzy PID Controller
Authors: Ding Lu , Cheng Wang
Published: August 2015

In light of the difficulty for the multi-variable fuzzy controller to formulate a sophisticated set of rules concerning multi-dimensional controlling, this project proposes a parallel connection fuzzy PID controller, each PID employing two fuzzy controllers to carry out parameter tuning. This project applies the parallel connection PID fuzzy controller in controlling the jacking system of the multi-hydraulic cylinders. Through the AMESim/Simulink connector, joint simulation is achieved for the hydraulic system and the controlling system. The result of the simulation reveals that this application effectively improves the dynamic and static performance of the system, as well as synchronization precision in the jacking of the hydraulic cylinders.
Design and Simulation for Electro-Hydraulic Proportional Tension Control System
Authors: Liu Yong Liang , Yuan Rui Bo , Shan Ze Yin
Published: August 2015

Sliding Mode Variable Structure(SMC) based on index approaching rate to control tension is used in this paper,because the lead sheet uncoiler electro-hydraulic tension control system parameters exist many problems,such as:time-varying,coupling multiple interference and so on.Through Matlab/Simulink simulation tool to make simulationanalysis for the electro-hydraulic proportional tensio control model,and comparing with PIDcontrol.The simulation results shows that SMC control is better than PID control.The system can be strongly adaped to parameters time-varying interference and has strong robustness.
Flow Field Simulation and Experimental Research on the Triangle Groove Cone Throttle Valve
Authors: Li Yan Jie , Bai Yun Feng , Zhang Jian , Jiang Ji Hai
Published: August 2015

Aiming at the problems of cavitation noise in the cone throttle valve, triangle groove cone throttle valves with 45, 53, 60 degree were selected as the research objects. Firstly the structure characteristics of the throttle valves were analyzed, then the three-dimensional models and mathematical models were established. By using the finite element simulation software ADINA, the simulation diagrams about pressure and flow velocity of the cone valves were obtained and then verified on the test bench which was about the noise characteristics of throttle valve. The investigation result showed that the flow field of the cone valve was complex, and there were local low pressure areas where were high incidence of cavitation; the valve with 60 degree spool had the minimum noise, which showed the best performance, then the 53 degree spool was a bit poor, and the worst valve was 45 degree spool. Increasing the angles of the triangle groove appropriately could reduce the cavitation noise and improve the performance of the valve. This investigation has great significance on understanding the flow field and controlling the cavitation noise in triangle groove cone throttle valves. Besides it also has a certain reference value to other hydraulic components on the cavitation noise control and structural optimization.
Analysis of the Cavitation in the Jet Flow Field of the V-Type Valve Orifice
Authors: Ren Hao Ling , Lin Tian Liang , Miao Cheng , Li Zhong Shen , Fu Sheng Jie
Published: August 2015

Valve orifice is the common place that the cavitation easily occurs in the hydraulic systems. This paper introduces a criteria to estimate the inception of the cavitation of the V-type valve orifice with the stress state. Based on this criteria, a cavitation model which considers the dynamics of the cavity and incompressible gas is proposed to analyze the pressure, stress and the cavitation distribution of the phase in the V-type orifice. The distributions of the cavitation along the axis and the cross section are analyzed. The simulation results show that the cavitation is easily occurred in the downstream just after the orifice and the bubbles are mostly gathered in the top of the cross section which is vertical to the axis of the flow field. The simulation results is reasonable according to the facts. Accordingly, the cavitation of the V-type orifice is predicted reasonably. The research and results of this paper are useful for the design of the hydraulic valves.
The Simulation and Analysis on Leakage Flow Rate of Plunger Pair of Plunger Water Hydraulic Motor
Authors: Shan Ze Yin , Yuan Rui Bo , Li Chao
Published: August 2015

Plunger pair of plunger water hydraulic motor has the problem of leakage. Simulation of the leakage of plunger pair of plunger water hydraulic motor is carried out. Through calculation and analysis establish the model of plunger pair of plunger water hydraulic motor. The simulation analysis of leakage of plunger pair was carried out with Fluent software. Theoretical calculation and simulation results of plunger pair are obtained. The results provide basis and method to reduce the leakage of plunger water hydraulic motor and design for the motor plunger.
The Machine Design and Parameter Analysis of the Bar Bending which Based on the ADAMS
Authors: Xia Xiao Qian , Dong Wei Min , Luo Jin Song
Published: August 2015

The three dimensional model of the bar bending mechanism was carried out by using the software Solidegde in this article,and then,import it into the multi-body dynamics simulation software Adams for the dynamic simulation and parameter optimization. Analysis results show that: The non-uniform stress phenomenon on the institutions must be effectively reduce under a appropriate damping ratio coefficient .
Discussion on Structural Design of O-Ring Seal Used in Aviation 28MPa Hydraulic System
Authors: Zhou Qing He
Published: August 2015

Most of China's newly developed fighters are equipped with 28MPa hydraulic system rather than previous 21MPa hydraulic system since introduction of Russian S27 fighter production line. However, there is no truly applicable design standard guiding the sealing design of 28MPa hydraulic products in aviation applications although 28MPa hydraulic system has been applied in China's fielded fighters for quite a long time. In this article, the sealing standards both abroad and home and the sealing materials used by world-famous seal manufacturers are respectively investigated. In addition, calculation methods and allowable limits are recommended for the tensile and compression rate used in design calculation for sealing structure. All these recommended values can be referenced by sealing design engineers before China's high pressure sealing design standards are implemented.
High Photoabsorption and Photostability of Photosesitizers for Kaolinite-Bixin Solar Cells
Authors: Hadary Ferry , Wahyuni Nelly , Syaifurrahman  , Hiendro Ayong
Published: August 2015

Natural pigments have low photostability due to the nature of their molecular structures. The conjugated structures lead the pigment molecules to be degraded quickly by the UV radiation. In this work, bixin is used as natural pigments for photosensitizers. Kaolinite is employed as a barrier to protect the bixin from degradation. Impregnating bixin into kaolinite forms more stable molecular structures which improve photostability of the bixin. Moreover, kaolinite can serve as a carrier material which allows the transfer of electrons from bixin to kaolinite molecules through the hydrogen bonds that form between them. As results, kaolinite does not only slow down the bixin photodegradation rate, but also improve bixin photoabsorption capability
Optimization Position and Tilt Angle for Automatic Tracking Solar Collector in Solar Thermal Cooling System of Building MRC FTUI
Authors: Nasruddin  , Suyana Aldi , Budihardjo  , Arnas
Published: August 2015

The solar thermal cooling system is expected to replace the utilization of conventional cooling system, particularly the vapour compression system. This cooling system is power-efficient, refrigerant environmentally friendly and able to use the abundant potential of solar energy. Hence, the optimization of this cooling system is necessary in order to obtain the best performance. For that purpose, this study focus on the simulation phase of the solar thermal cooling system utilization in MRC FTUI building as well as the optimization of solar collector applying EnergyPlus and GenOpt software. The position and the tilt angle of solar collector set as parameter study to gain the best performance of solar collector to produce hot water, which will be used as energy source in the absorption chiller. Finally, the optimum position and the optimum tilt angle every month in a year were obtained from this study.
3-D Ionospheric Plasma Bubble Model for Ground-Based Augmentation System
Authors: Rungraengwajiake Sarawoot , Supnithi Pornchai
Published: August 2015

The ground-based augmentation system (GBAS) is now an important system for assisting the global navigation satellite system (GNSS) based aircraft navigation during landing phases. Since the ionospheric irregularity is one of the most serious problem in the high-precision GBAS, the impacts of ionospheric irregularities to GBAS in many countries need to be studied before actual installation and operation. However, most of previous studies are based on the rare ionospheric storm events observed in US in the mid-latitude region. For Thailand, which is located in equatorial and low-latitude region, the ionospheric irregularity known as plasma bubble is a common phenomenon after sunset, considered to have adverse impact to the integrity of GBAS operation. In this paper, we propose a simple 3-D ionospheric plasma bubble model for studying its impacts on GBAS operation in Thailand. The background electron density generated by the NeQuick2 model combined with the rectangular depletion are used in the near real-time simulation.
Performance Analysis and Comparison for Wireless Indoor Positioning Systems in Multi-Floor Building
Authors: Kondee Kittipob , Prommak Chutima
Published: August 2015

In this paper, performance analysis and comparison for Wireless Indoor Positioning Systems (WIPS) in multi-floor building are presented. Different structures of WIPS are considered. In particular, WIPS structure designed by our proposed technique was compared with other structures designed by an opportunistic approach. The comparisons were conducted by using signal strength data from the real measurement and from simulation models. An efficiency of the simulation models was compared as well. The results show that the WIPS structure designed by our proposed technique yield better indoor positioning performances in term of the accuracy and precision.
Development of Rectangular Loop Microstrip Antenna Integrated with Light Emitting Diode (LED) for Wi-Fi Application
Authors: Subahir S. , Ali M.T. , Ramli Nurulazlina A. , Kamaruddin Siti Nurhidayah , Awang A.H. , Kamarudin Muhammad Ramlee
Published: August 2015

This paper presents the development of a rectangular loop microstrip patch antenna integrated with Light Emitting Diode (LED) for Wifi application. The objective to integrate with LED is to have dual applications in a device which illumination and also wireless communication. The antenna was designed at a frequency of 2.4 GHz and Computer Simulation Technology (CST) was used to optimized the position of LED within the rectangular loop antenna. The performances of the antenna in terms of return loss, gain and radiation pattern was verified through simulation by using Microwave Studio in CST. The antenna was fabricated on FR4 substrate with permittivity, εr =4.5 and thickness,h= 1.6mm. The LED integrated within the patch was conducted parallel and was measured by Vector Network Analyser (VNA) to demonstrate the capacity and potential of the antenna. The antennas are reasonably well matched at their corresponding frequency of operations between simulation and experiment.
User Perspective Network Reliability Analysis for the Current Multiservice Network Infrastructure
Authors: Yee Thiri The Wut , Wipusitwarakun Komwut
Published: August 2015

Service-oriented network trends become more and more popular with network providing new and innovative type of services that require various levels of QoS performance and reliability. Internetworking technology also evolves from single service network (SSN) to multiservice network (MSN) infrastructure in order to simplify network operation and management. However, more resource sharing exposes significant negative impacts upon end-users who access services inside MSN. As a result, an efficient evaluation of the reliability from the user perspective is indispensable for designing the reliable service network. In this paper, we analyze the existing topological-related reliability measurement metrics inside the current MSN environment firstly and we claim that they are inadequate since they only consider network reliability from the system perspective that does not reflect the actual user point of view. Then we propose a new measurement metric, which is suitable for the user perspective reliability analysis for MSN. The evaluation section demonstrates that our proposed metric is more reasonable and efficient for user perspective reliability analysis in the current MSN environment than the existing analysis metrics.
Monitoring and Indexing System for Illegal Tobacco Sales on Website in Thailand by Using Web Crawler Technique
Authors: Soontornpipit Pichitpong
Published: August 2015

This research designs an artificial intelligent (AI) system for monitoring and collecting tobacco sales on website in Thailand. The web mining and web crawler enhanced with AI are used for gathering a list of URL page while filtering and discarding the redundant pages. Only the websites that sale tobacco products such as cigarettes and electronics-cigarette (e-cigarette) are collected and indexed. Social media like blog, Facebook, Twitter and Line are also included. The data results have been sent monthly to the Excise department at Ministry of Finance (MOF) and Ministry of Information and Communication Technology (ICT) for more investigation and process in courts.
1-D Integer Transform for HEVC Encoder Using DSP Slices on FPGA
Authors: Arayacheeppreecha Pancheewa , Pumrin Suree , Supmonchai Boonchuay
Published: August 2015

This paper presents an FPGA architecture for the 1-D integer transform of the latest video coding standard, the High Efficiency Video Coding (HEVC). The design employs hard multipliers in dedicated DSP slices, which are already embedded into an FPGA die, to gain high throughput and save general purpose LUTs. The proposed architecture can support 4x4, 8x8, 16x16, and 32x32 transform. A multiplier sharing scheme is introduced to reduce the total number of required DSP slices in order to be able to fit the design onto a Spartan-3A FPGA. The design can reach a maximum throughput of 1,692 Msamples/s irrespective of the transform size, which is enough to encode 8K (7680x4320) videos at 30 fps. This work is a pioneer research that utilizes the dedicated multipliers on FPGAs in the design of the HEVC transform.
Voltage-Mode Multifunctional Biquadratic Filter Using VDDDA
Authors: Soisang Suriya , Jirasereemomkul Kamon , Jaikla Winai , Higuchi Kohji
Published: August 2015

This paper presents a new voltage-mode single-input multiple-output multifunctional biquadratic filter using voltage differencing differential difference amplifiers (VDDDA) with high-input impedance. It consists of two VDDDA, two resistors, and two grounded capacitors. It can synthesize basic filter functions: high-past (HP), low-pass (LP) and band-pass (BP), responding through only single structure. The natural frequency can obtain by adjusting bias currents of VDDDA without disturbing quality factors. Because of using VDDDA as an active device in the circuit, the power consumption was low. The simulation using PSPICE program indicated that circuit operation has good agreement with the theory.
CMOS-Based Current-Mode Elliptic Ladder Band-Pass Filter
Authors: Saising Ekkapong , Pattanathadapong Thanate , Prommee Pipat
Published: August 2015

This paper presents the realization of CMOS-based current-mode Elliptic ladder band-pass filter by using doubly terminated Elliptic RLC ladder band-pass filter prototype [1], [2]. The proposed circuit contains lossless integrators, lossy integrators and multiple outputs current gains. The frequency response of the proposed circuit can be electronically tuned between 1 MHz and 100 MHz by adjusting bias current between 1μA and 1,000 μA. The proposed circuit uses 1.5 V power supply and 0.1 W power consumption. The passive elements that contained in the proposed filter are only grounded capacitors without using other passive elements that can make this filter suitable for integrated circuit. PSPICE simulation results are carried out by using TSMC 0.18 μm technology and agreed well with the theory.
Effect of MgO Barrier Thickness with Tilted Magnetization on Temperature Increase in Magnetic Tunnel Junction Devices during Current-Induced Magnetization Switching
Authors: Surawanitkun Chayada
Published: August 2015

Recently, there has been a growing interest in the thermal stability in magnetic tunnel junction (MTJ) devices with an aspect of the temperature increment during current-induced magnetization switching (CIMS) process. In this work, the temperature increment is explored with factors of the tile of the initial magnetization direction in free layer, θ0, and the MgO layer thickness for different pulse durations, tp. The results show that the highest temperature in MTJ nanopillar is significant at the θ0 of1°-5° and the pulse duration tp < 0.4 ns. Moreover, the temperature results with decreasing the MgO layer thickness are not considerable difference at θ0 of1°-5° for the same tp.
The Potential of Routers Configured with the Switch Matrix by RTL
Authors: Sato Tomoaki , Chivapreecha Sorawat , Moungnoul Phichet
Published: August 2015

In this paper, analysis results of an FPGA (Field-Programmable Gate Array) designed in RTL (Register Transfer Level) shows that does not have a problem in routing. It has many advantages than conventional FPGA developed by the transistor level. However, the crossbar switch of the FPGA designed in RTL has a problem with the direction of the signal. The direction is fixed in one direction unlike the conventional crossbar switch. Routing is analyzed by using the circuit of three input two output.
Signal Analysis of Scratch-Detection on Magnetic Disc by Using Light Reflection Approach
Authors: Polsawat Achinee , Suwannata Nattawoot , Siritaratiwat Apirat , Kruesubthaworn Anan
Published: August 2015

In hard disk manufacturing, a process of quality inspection of magnetic disc is crucially focused on finding traces of scratch that occur on the surface by various sources such as production process, machinery, tribology or recording head. It may affect the efficiency of magnetic disc’s read/write ability. Many approaches have been proposed to detect the scratch by either destructive or non-destructive testing. In this study, it shows an analysis of signals from the detected scratches on the magnetic disc by reflection light method, using a CD pick-up head. It works by producing an incidental laser beam to the surface and then detecting it by a photodiode detector. The results showed that when the laser beam is incident onto the magnetic disc with/ without scratch, reflecting lights to the photodiode are different and the signal changes according to the intensity of the incidental/reflecting lights.
Laser Cleaning of Polypropylene Contamination on Magnetic Head Slider Surface
Authors: Rungcharoen Narongpun , Wannaprapa Mongkol , Pijitrojana Wanchai
Published: August 2015

This work aims to obtain the well-implemented laser cleaning to remove polypropylene (PP) contamination of sizes ragne 10-60 µm on magnetic head slider by excimer laser at 248 nm. The finite element: FEM [1] simulations shows non-destructive cleaning at laser fluence of 100mJ/cm2. The experiment shows that laser fluence is non-destructive at 70mJ/cm2 and can remove 15-40% of polypropylene (PP) contamination.
Determination of Transition Jitter Noise by Time Domain Analysis
Authors: Chooruang Komkrit
Published: August 2015

Transition jitter noise can be caused by a variety of factors such as contributions by the medium, head, and drive electronics. In this work, transition jitter noise in magnetic recording is measured based on the time domain analysis. An example of transition jitter noise in perpendicular media is investigated using captured noisy replay signals compare with a reconstructed ideal signal. It is found that transition noise increased with increasing linear density and dropped sharply after the maximum point.
The Synthesis of Nano-Porous Alumina by Anodization Process
Authors: Jaroonpak Ekarach , Terawan Porntawee , Wannawong Naruemon , Kaewrawang Arkom , Kruehong Chaiyaput , Thabuth Mallika
Published: August 2015

The porous alumina templates were synthesized by anodization process. For preparation, the aluminum foils were cleaned by acetone acid and ethanol. After that, cleaned foils were firstly anodized by oxalic acid with direct current (DC) voltage source. When the first anodization process was complete, the aluminum foils were etched by chromic and phosphoric acid for an hour and then they were secondarily anodized for 15 min to increase the pore depth. For characterization, the surface morphology of porous alumina on aluminum surface was evaluated by scanning electron microscope. The results show that the pore diameter increases with increasing DC voltage and concentration of oxalic acid. The lowest pore diameter is 57.19 nm at DC voltage of 20 V for concentration of 0.2 M that it has highest pores density of 157 Gpores/in2.
The Comparison of the String Suspension Porcelain (5-6-7 Insulators)/String Efficiency in Case of Dry and Wetted Water Contamination Condition
Authors: Tonmitr Norrawit , Tonmitr Kittipong , Kaneko Eiji
Published: August 2015

The voltage distribution along porcelain insulator string is affected by stray capacitances which causes a non-uniform voltage distribution. In order to explain these phenomena clearly in this research, an equivalent circuit that takes the insulator material properties and the stray capacitances is implemented in the TINA program package to analyze the voltage distribution along the insulator string in dry and wetted water contamination, with and without guard ring under 50 Hz power frequency voltage. From these simulation results, we found that the string efficiency of clean string insulator condition which the insulator consists of 5, 6, 7 insulators/string without guard ring equals 66.92, 58.45 and 53.71%, respectively. The string efficiency which the insulator consists of 5, 6, 7 insulators/string with guard ring equals 90.42, 87.03 and 78.35%, respectively. As for the wetted water contamination string insulator condition which the insulator consists of 5, 6, 7 insulators/string without guard ring equals 98.33, 97.13 and 95.44%, respectively. The string efficiency which the insulator consists of 5, 6, 7 insulators/string with guard ring equals 99.79, 99.66 and 99.62%, respectively.
Hybrid Renewable Energy Systems in Saudi Arabia
Authors: El Khashab Hisham , Al Ghamedi Mohammed
Published: August 2015

The continuous rise of energy demand worldwide combined with the decrease of natural resources such as fossil fuel represents a huge energy problem which facing humanity. Industry as well as consumers must rethink how to produce energy at low cost price. Renewable Energy (RE) applications and energy savings are keys to meet this challenge in a sustainable way. In the hot and sunny areas of the Arab countries, renewable sources like solar energy can play a role to slove energy problem. According to that the renewable energy sources such as photovoltaic, wind, biomass, etc… have an important role especially when the (high-tech.) new technologies can interfere. This paper investigates RE sources applications at Yanbu, Saudi Arabia, besides a simulation using HOMER software to three proposed systems newly erected in Yanbu Industrial College Renewable Energy (RE) lab. The lab represents a hybrid system, composed of PV, wind turbine, and Fuel cell systems. The cost of energy is compared in the three systems to compare the generated energy cost. This study is to evaluate the actual cost of RE sources in developing countries. The climatic variations at Yanbu that is located on the west coast of Saudi Arabia are considered.
Static Voltage Stability Margin Enhancement Using Shunt Capacitor, SVC and STATCOM
Authors: Thasnas Natakorn , Siritaratiwat Apirat
Published: August 2015

This paper presents the study of static voltage stability margin enhancement using shunt capacitor, SVC and STATCOM. AC and DC representations of shunt compensation devices are used in the continuation power flow process in static voltage stability study. Various performance measures including PV curves, voltage profiles, and power losses are compared. Placement and sizing techniques of shunt compensation devices are proposed for loading margin enhancement. The study has been carried out on the IEEE 14 bus test system.
Impact of pin Type Insulators on Power Distribution Networks Caused by Lightning Impulse Overvoltage
Authors: Phothilath Khamhyo , Tonmitra Kittipong , Artrit Pramin
Published: August 2015

The impact of pin type insulators may cause from the lightning impulse overvoltage that hits directly to them. To investigate this problem, this work applies the ATP Draw version 5.6 software to simulate the effect of pin type insulators. Therefore, the obtained results are showed that pin type insulators at pole P4 is closely the lightning strike point, has affected more than the poles P3-P1 and P5-P7. In addition, the conductor has been taken by the heat of over current flow through on it. The flashover and breakdown severity is on insulator upon the distance of them.
Minimization of Voltage Deviation by Considering Active Power Change of Solar PV Plant
Authors: Eth Oudaya , Eua-Arporn Bundhit , Chaitusaney Surachai , Van Dao Tu
Published: August 2015

For grid-connected photovoltaic systems, voltage profile is one of the most important issues to consider when the active power from PV plant changes because of variation of sunlight or night time. This paper proposes a method to calculate the optimal reactive power from solar PV plant to minimize voltage deviation when active power of one PV plant changes. By injecting of optimal reactive power, the voltage profile of all buses will be improved. The IEEE 33 bus system is selected to analyse the voltage deviation in various conditions [1].
Optimal Capacitor Placement for Loadability Enhancement Based on Continuation Power Flow
Authors: Buayai Krittidet , Kerdchuen Kaan
Published: August 2015

This paper presents the optimal capacitor placement in distribution power system for enhancement loadability. The continuation power flow technique is included in multi-objective function of particle swarm optimization (PSO) called non-dominated sorting PSO (NSPSO) for finding the capacitor location making maximum loadability. The experimental results of 33-bus system show that the optimal location and size of capacitor are different from considering power system loss and voltage deviation in objective function of optimization process.
Optimal Placement of Distributed Generation Using Bacterial Foraging Optimization Algorithm
Authors: Sodsri Parichart , Sookananta Bongkoj , Pusayatanont Mongkol
Published: August 2015

This paper presents the determination of the optimal distributed generation (DG) placement using bacterial foraging optimization algorithm (BFOA). The BFO mimics the seeking-nutrient behavior of the E. coli bacteria. It is utilized here to find the location and size of the DG installation in radial distribution system in order to obtain minimum system losses. The operation constraints include bus voltage limits, distribution line thermal limits, system power balance and generation power limits. The algorithm is tested on the IEEE 33 bus system. The result shows that the algorithm could be used as an alternative to the other techniques and improvement of the algorithm is required for acceleration and better accuracy of the calculation.
Development of Smart Plug Using Power Line Communication
Authors: Srihara Naruephon , Wongsaisuwan Manop
Published: August 2015

This paper describes the development of Smart Plug using power line communication. The smart plug system is comprised of two main components which are Smart Plug and Data Concentrator. Smart Plug is a wall outlet which is able to measure power consumption and to control (turn on/off) the connected load via UDP protocol. Smart plug will measure the voltage, current, energy and power consumption of electric home appliances that are connected to it and broadcast these data over the distributed power wires. Data Concentrator is a center of data accessing between the user and each of the smart plug in the system. System owners can access the system to get the electricity consumption data in their system or to control the operation of electric home appliances that are connected to any smart plug by a personal computer or a smart device. Each smart plug has 16-bit unique ID for address identification in the system so this system can support up to 65,536 smart plugs.
Development of On-Line Monitoring for Power Transformer Bushing
Authors: Suwanasri Thanapong , Suwanasri Cattareeya
Published: August 2015

This paper presents the development of on-line monitoring for condenser type bushing of power transformer in order to detect a degradation of bushing and to provide the alarm before bushing failure. For the bushing degradation analysis, the capacitance and power factor of bushing internal insulation are on-line monitored and measured by installing the sensing device at the test tap of bushing. The changing of internal insulation capacitance leads to the change of voltage across tap capacitor and the change of leakage current through bushing insulation at the test tab. Such changes result in the change of power factor or phase angle of leakage current. Thus, the leakage current is additionally detected by installing the Hall Effect sensing device to observe the trend of bushing failure. A total of eight cases of both normal and degraded insulation are investigated. The internal insulation capacitance as well as the magnitude and phase angle of three phase leakage current were measured and compared with the commissioning value or observed the increasing trend to set the alarm level. In case of degraded bushing, the leakage currents changed and caused the summation of leakage current value to be greater than the standard value. Then the alarm is activated. This knowledge was used to develop the detection and decision making algorithms in LabVIEW program to determine the condition of transformer bushing.
Dynamic Performance of Reactive Power Control for Voltage Support in Low-Voltage Distribution Networks with Photovoltaic Systems
Authors: Pachanapan Piyadanai , Premrudeepreechacharn Suttichai
Published: August 2015

The coordinated reactive power control among photovoltaic (PV) systems, without communication requirement, is introduced to prevent the over-voltage problems in radial distribution networks. The voltage source inverter in PV system can provide the reactive power control to deal with the dynamic voltage variations. Two reactive power control methods, Q(P) and Q(V), can be employed into each PV system depending on its location. The dynamic voltage control performances are examined on simulation in DIgSILENT PowerFactory software. The results showed that the proposed control method can mitigate the rise of voltage level sufficiently.