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27,762 Article Results

FPGA Based Symmetrical Multi Level Inverter with Reduced Gate Driver Circuits

10.11591/ijres.v6.i1.pp53-68
G. Durga Prasad , V Jegathesan
Multilevel converters tender advantages in terms of the output waveform quality due to the increased number of levels used in the output voltage modulation and have been widely accepted for high-power high-voltage applications.  This paper introduces topology in multilevel dc link inverter (MLDCLI), which can significantly reduce the switch count and improve the performance. The preferred topology provides a dc voltage with the shape of a staircase approximating the rectified shape of a commanded sinusoidal wave, to the bridge inverter, which in turn gives the required alternating waveform. This topology requires fewer components compared to traditional Multi level Inverters (MLI).Therefore, the overall cost and complexity are significantly reduced particularly for higher output voltage levels. Finally, Matlab/Simulink and XILINX are used as a simulation and compiler architecture of control circuit embedded in FPGA. Simulation and experimental results for fifteen-level inverter are presented for validation.
Volume: 6
Issue: 1
Page: 53-68
Publish at: 2018-05-28

FPGA-based Architecture of Direct Torque Control

10.11591/ijres.v6.i1.pp20-27
Azaza Maher , Echaieb Kamel , Mami Abdelkader
This paper presents an optimized FPGA architecture of a DTC “direct torque control” drive of an induction motor. The proposed architecture is based on variable fixed point world size and the use ipcores in order to achieve higher sampling frequency which leads to reduce the electromagnetic torque and flux ripples. The hardware implementation was experimentally validated, the results shows the effectiveness of the hardware DTC drive implementation by the minimization of the torque and flux ripple
Volume: 6
Issue: 1
Page: 20-27
Publish at: 2018-05-28

Minimizing the loses of solar power generation by designing an intelligent tracking system implemented on FPGA

10.11591/ijres.v6.i3.pp169-178
Alaa Hamza Omran
The increasing of using of an electrical power as a power source in a large number of devices can occur a serious problem in our daily life. One of the useful power sources is a solar cell which used to overcome many problems of power generation. In this paper, the solar cell model is proposed to minimize loses of solar power generation by designing of an intelligent tracking system based on FPGA. PSO algorithms are used to train the neural networks to control the speeds and the directions of rotations of two DC motors with the help of FPGA cart. The proposed system was implemented in MATLAB; and for the hardware part, FPGA was used for the implementation of neural networks.
Volume: 6
Issue: 3
Page: 169-178
Publish at: 2018-05-28

CMOS Active Inductor Based Voltage Controlled Oscillator

10.11591/ijres.v6.i2.pp97-104
Dhara P Patel , Shruti Oza , Rajesh A Thakker
A Tunable Active Inductor (TAI) based Voltage Controlled Oscillator (VCO) for Radio Frequency (RF) applications ranging from 670 MHz - 1.53 GHz is presented. A design of low phase noise and compact VCO is proposed. In order to lower the phase noise of VCO, its RF output power has been improved. The use of low voltage active in-ductor circuit reduces the power dissipation of VCO. The single ended CMOS active inductors with minimum number of transistors are used to consume less die area of VCO circuit. The low power dissipation of the circuit have high efficiency to generate output RF power. A supply independent variable current source tunes the VCO. The post layout design is simulated in Cadence spectreRF using TSMC 180 nm process libraries. The VCO circuit shows the phase noise variation from -124 to  - 126 dBc/Hz and an active area of 0.0049 mm2. The VCO core circuit, excluding output buffers, consumes 10 mW at 1.8 V supply voltage.
Volume: 6
Issue: 2
Page: 97-104
Publish at: 2018-05-28

FPGA implementation of DS-CDMA Transmitter and Receiver

10.11591/ijres.v6.i3.pp179-185
Harinath Mandalapu , B Murali Krishna
Direct sequence spread Spectrum (DSSS) is also known as direct sequence code division multiplexing. In direct sequence spread spectrum the stream of information to be transmitted is divided into small pieces each of which is allocated across to a frequency channel across the spectrum. Data signal at the point of transmission is collaborated with a higher data-rate bit sequence (also called chipping code) that divides the data according to a spreading ratio. A redundant chipping code helps the signal resist interference and also enables the original data to be recovered if data bits are damaged during the transmitting. In this project direct sequence spread spectrum principle based code division multiple access (CDMA) transmitter and receiver is implemented on SPARTAN 3E FPGA. The Xilinx synthesis technology (XST) of Xilinx ISE tool used for synthesis of transmitter and receiver on FPGA Spartan 3E.
Volume: 6
Issue: 3
Page: 179-185
Publish at: 2018-05-28

NOC Based Router Architecture Design Through Decoupled Resource Sharing Using CABHR Algorithm

10.11591/ijres.v6.i2.pp105-110
A. Kalimuthu , M. Karthikeyan
A Network-on-Chips (NoCs) is rapid promising for an on-chip alternative designed in support of many-core System-on-Chips (SoCs). In spite of this, developing an increased overall performance low latency Network on chip using low area overhead has always been a new challenge. Network on Chips (NoCs) by using mesh and torus interconnection topologies have become widely used because of the easy construction. A torus structure is nearly the same as the mesh structure, however, has very slighter diameter. In this regard, we propose effective router design for Decoupled Resource sharing in a torus topology based on clustering algorithms Based Hierarchical Routing (CABHR) to get better the efficiency of NoC. We show that our approach is provides improved latency and energy consumption, overall performance developments compared to the most distinguished existing routing technique
Volume: 6
Issue: 2
Page: 105-110
Publish at: 2018-05-28

ARM Controller and EEG based Drowsiness Tracking and Controlling during Driving

10.11591/ijres.v6.i3.pp127-132
B. Naresh , S. Rambabu , D. Khalandar Basha
This paper discussed about EEG-Based Drowsiness Tracking during Distracted Driving based on Brain computer interfaces (BCI). BCIs are systems that can bypass conventional channels of communication (i.e., muscles and thoughts) to provide direct communication and control between the human brain and physical devices by translating different patterns of brain activity commands through controller device in real time. With these signals from brain in mat lab signals spectrum analyzed and estimates driver concentration and meditation conditions. If there is any nearest vehicles to this vehicle a voice alert given to driver for alert. And driver going to sleep gives voice alert for driver using voice chip. And give the information about traffic signal indication using RFID. The patterns of interaction between these neurons are represented as thoughts and emotional states. According to the human feelings, this pattern will be changing which in turn produce different electrical waves. A muscle contraction will also generate a unique electrical signal. All these electrical waves will be sensed by the brain wave sensor and it will convert the data into packets and transmit through Bluetooth medium. Level analyzer unit (LAU) is used to receive the raw data from brain wave sensor and it is used to extract and process the signal using Mat lab platform. The nearest vehicles information is information is taken through ultrasonic sensors and gives voice alert. And traffic signals condition is detected through RF technology.
Volume: 6
Issue: 3
Page: 127-132
Publish at: 2018-05-28

Software and Hardware for managing Scratch Pad Memory

10.11591/ijres.v6.i2.pp69-81
Chabane Hemdani , Rachida Aoudjit , Mustapha Lalam , Khaled Slimani
This paper proposes a low-cost architecture to improve the management SPM (Scratch Pad Memory) in dynamic and multitasking modes. In this context, our management strategy SPM based on Programmable Automaton implemented in Xilinx Vertex-5 FPGA is entirely different from prior research works. SPM is generally managed by software (by a strong programming logic or by compilation). But our Programmable Automaton facilitates access to SPM in order to move code or data and liberates space in SPM. After this step, software takes over content management of SPM (what part of code or data should be placed in SPM, locates spaces of Heap and Stack). So the performance of the programs is actually improved thanks to minimization of the access latency at the DRAM (Dynamic Random Access Memory or Main Memory).
Volume: 6
Issue: 2
Page: 69-81
Publish at: 2018-05-28

FPGA based Implementation of Symmetrical Reduced Switch Multilevel Inverter

10.11591/ijres.v6.i1.pp28-35
K. Venkataramanan , B. Shanthi , T. S. Sivakumaran
Multilevel inverter has become more popular and attractive for drive applications. Among the various modulation techniques, Carrier based techniques has been commonly used because of their simplicity and flexibility. This paper presents the comparisons of bipolar multicarrier pulse width modulation for the new symmetrical multilevel inverter. The performance parameters of new multilevel inverter were analyzed through various switching strategies. The detailed study has been carried out by MATLAB/SIMULINK. The real time implementation was carried out using FPGA. The results of both simulation and experimentation were compared.
Volume: 6
Issue: 1
Page: 28-35
Publish at: 2018-05-28

Optimization of Resource Utilization of Fast Fourier Transform

10.11591/ijres.v6.i3.pp186-190
Subhash Chandra Yadav , Pradeep Juneja , R. G. Varshney
This paper considers the optimization of resource utilization for three FFT algorithms, as it pertains not to the input samples or output modes, but to the twiddle factors that arise in Cooley-Tukey FFT algorithms. Twiddle factors are a set of complex roots of unity, fixed by the transform order for the particular algorithm. This paper shows the comparison between three known FFT algorithms, DIT-FFT, DIF-FFT and GT algorithm. All these algorithms are implemented on FPGA (Spartan-3 XC3S4000l-4fg900) with XILINX 10.1 ISE.
Volume: 6
Issue: 3
Page: 186-190
Publish at: 2018-05-28

Using FPGA Design and HIL Algorithm Simulation to Control Visual Servoing

10.11591/ijres.v6.i2.pp111-119
Lway Faisal Abdulrazak , Zaid A. Aljawary
This is a novel research paper provides an optimal solution for object tracking using visual servoing control system with programmable gate array technology to realize the visual controller. The controller takes in account the robot dynamics to generate the joint torques directly for performing the tasks related to object tracking using visual servoing. Also, the notion of dynamic perceptibility provides the capability of the designed system to track desired objects employing direct visual servoing technique. This idea is assimilated in the suggested controller and realized in the programmable gate array. Additionally, this paper grants an ideal control framework for direct visual servoing robots that incorporates dynamic perceptibility features. With the aim of evaluating the proposed FPGA based architecture, the control algorithm is applied to Hardware-in-the-loop simulation (HIL) set up of three degrees of freedom rigid robotic manipulator with three links. Furthermore, different investigations are performed to demonstrate the behavior of the proposed system when a trajectory adjacent to a singularity is attained.
Volume: 6
Issue: 2
Page: 111-119
Publish at: 2018-05-28

Android Based Switch Controlling Technique for LED Bulbs Using Bluetooth/Wi-Fi Technology

10.11591/ijres.v6.i1.pp48-52
Munigoti Saikiran , Lalith Nagaram Nagarajan , Malladi Bharath
This paper presents an efficient approach to switch on/off and control the intensity of an LED bulb from a remote place using Android Applications installed in a Smartphone. As LED household bulbs and lights are energy efficient, drop-in replacements for the incandescent lighting found in homes and offices. These lights produce a warm brightness while providing a significant cost savings over traditional lighting. Bluetooth & Wi-Fi modules are used simultaneously as an interface that make connection between Android Application and the LPC2148 controller by which the generated output can be viewed with the help of an LED bulb and control various other devices, based on the availability in particular areas.
Volume: 6
Issue: 1
Page: 48-52
Publish at: 2018-05-28

Sustainability Capacity of HIV Programs in National Capital Region, Philippines

10.11591/ijphs.v7i2.12408
Euris John B. Cawaling , Dennise U. Cunanan , Racidon P. Bernarte
Across all the regions in the Philippines, the National Capital Region (NCR) got the highest percentage (37%) for HIV newly diagnosed cases based from  the July-August 2017 HIV/AIDS and ART Registry of the Philippines’ report. The National HIV, AIDS, and STI Prevention and Control Program (NASPCP) of the Department of Health (DOH) lead the different health services in the prevention of HIV transmission. Anchored with the NASPCP, different HIV programs of DOH’s selected partner institutions and organizations within NCR continuously exist. However, due to the increase on the number of newly diagnosed HIV cases in the country, ensuring its sustainability through assessing the different domains of their program was in need to be studied. This article was based from an undergraduate thesis study which aimed to assess the sustainability capacity of HIV programs among DOH’s selected partner institutions and organizations within NCR, Philippines, scoping the eight domains specifically the environmental support, funding stability, partnerships, organizational capacity, program evaluation, program adaptation, communications, and strategic planning. The study used a quantitative approach; 17 government institutions specifically city health offices and 13 non-government HIV-related organizations for a total of 30 respondents. Survey method was utilized using the standardized Program Sustainability Assessment Tool adapted from the Washington University in St. Louis. Based from the results and findings of the study, generally, all the domains were leaning either in great and greater extent as verbally interpreted. From the conclusion, all the domains of the HIV programs of the respondents were sustainable. However, the study recommended to the DOH and all the HIV program implementers the developed and proposed narrative-type action plan. By that means, future researchers can assess again and see if the NCR achieved the vision of the Health Sector Plan for HIV and STI for the year 2015-2020 to have zero new infections, zero discrimination, and zero AIDS-related deaths.
Volume: 7
Issue: 2
Page: 137-144
Publish at: 2018-05-25

Infant’s Growth and Development at the Age of 6-12 Months Based on Breasfeeding

10.11591/ijphs.v7i2.11397
Maida Ayu Ara , Etty Sudaryati , Zulhaida Lubis
Infancy is a golden and critical period in the cycle of life. In this period, an infant that is not provided with exclusive breastfeeding has 14 times higher risk to death compared with an infant that is provided with exclusive breastfeeding. Malnutrition in the first year causes reduced brain cells up to 15-20% which leads to impaired growth and development of infant. Exclusive breastfeeding can fulfill the need for nutrients within the first 6 months of life. The objective of this study was to analyze the difference in growth and development of infants at the age of 6-12 months based on breastfeeding in the working area of Puskesmas Perawatan Ngkeran, Aceh Tenggara Regency. This is used comparative analytical resaerch with cross sectional design. The sample was 124 infants consisting of 62 infants with exclusive breastfeeding and 62 non exclusive breastfeeding, taken by purposive sampling. The data were collected by using questionnaires through interviews, measurement and observation. They were analyzed using chi square and logistic regression testing for confounding check. The results showed that there was a significant difference in growth and development of infants based on breastfeeding (p value=0.000) with prevalence ratio (PR)=4.167 (95%CI: 1.867-9.301), which indicated that the infant who did not get exclusive breastfeeding had 4.167 times higher risk to experience bad growth and development. Based on the examination of confounding variable found that food supplementation was the variable with the risk that influences infant’s growth and development. Mothers are expected to practice exclusive breastfeeding, health practitioners are suggested to conduct more counseling of exclusive breastfeeding for pregnant mothers, to have early breastfeeding initiation, to create supporting groups of exclusive breastfeeding and to issue health policy of exclusive breastfeeding.
Volume: 7
Issue: 2
Page: 120-129
Publish at: 2018-05-25

Dietary Nutrient Intake and Obesity Prevalence among Native American Adolescents

10.11591/ijphs.v7i2.11387
Hanchu Dai , Randy Song , Margaret Barth , Shasha Zheng
The prevalence of obesity among adolescent minority populations has been long recognized, but little research has been done on Native Americans adolescents. Using anthropometric measurements and dietary assessments, the findings within each study have shown to obtain baseline measures to determine the prevalence of obesity within the Sherman Indian High School’s Native American adolescent population. Data of each assessment appear to be of use for predicting obesity and creating effective future interventions. Compiling data using the Harvard School of Public Health Youth/Adolescent Questionnaire (HSPH YAQ), a semi-quantitative food frequency questionnaire allowed significant data to be found between normal and obese weight students. Utilizing each finding allows more effective ways of targeting and reversing the inclining rate of obesity among Native American adolescents. Results show that antioxidants being examined on such as vitamin E and lycopene are beneficial in lowering the obesity rate among Native American adolescents. Levels of fiber, thiamin and folate consumption was significantly lower among the obese population in Sherman Indian High School’s Native American adolescents. Moreover, dietary mineral intake was shown to be lower among obese Native American adolescents comparing with the normal weight group. The results suggested that dietary consumption of these nutrients might correlate and predict obesity and lead to the development of effective interventions for Native Americans. This study also found the effects of total fiber and vitamin B in diets with lifestyle intervention in prediabetic adults, showing that total fiber intake among the normal weight students is significantly higher than obese students, indicating that fiber and vitamin profile could be important determinants of the effect of dietary intervention.
Volume: 7
Issue: 2
Page: 114-119
Publish at: 2018-05-25
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