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31,377 Article Results

Effects of self-help groups intervention on coping strategies of parents of children with Autism Spectrum Disorder (ASD)

10.11591/ijphs.v8i1.17026
Ridhoyanti Hidayah , Retno Lestari
Coping strategies were significant predictors of psychosocial adaptation in parents of children with autism spectrum disorder (ASD). Self-help groups could be effective resources for parents in dealing with problems wile caring for children with ASD. The purpose of this study was to analyze the effects of self-help groups on coping strategies in parents of children with ASD. This study used pre and post quasi-experimental tests without a control group using self-help group interventions. There were thirty-three participants taken from the Malang City Autism Service Center using purposive sampling. Coping strategies based on cognitive and psychomotor abilities were measured using a questionnaire. The results showed paired t-test in all groups, at 5% significance level, statistically significant difference between mean score before and after self-help group interventions. Coping strategies in groups that received two supervised sessions and four times independently reached higher score compared to other groups. It can be concluded that it is important to implement self-help groups for parents who care for children with special needs.
Volume: 8
Issue: 1
Page: 20-25
Publish at: 2019-03-01

Purchasing power, fruits vegetables consumption, nutrition status among elementary school student

10.11591/ijphs.v8i1.16304
Yohan Fallo , Adi Magna Patriadi Nuhriwangsa , Diffah Hanim
Food purchasing power is usually defined as a household's economic ability to obtain food which is determined by measuring the income allocated for food purchase, the price of food consumed, and the number of family members. More than 50% of the sub-districts in South Central Timor are vulnerable to food consumption due to their low purchasing power, thus causing low fruits and vegetables consumption. To analyze the correlation between purchasing power, fruits and vegetables consumption, with nutrition status of elementary school students. Analytic observational using a cross sectional design. Sample size of 108 students was achieved using simple random sampling method. Independent variables are purchasing power, fruits and vegetables consumption. Dependent variable is nutrition status. Fruits and vegetables consumption data was collected using food frequency, purchasing power data was collected using questionnaires, and nutrition status was collected by calculating IMT/U. The statistics tests used were chi square test. The mean number of fruits and vegetables consumption of the elementary students was 0,36±0,483 and the mean number of purchasing power was 2,80±0,405. Bivariate study test results show a significant correlation between purchasing power and nutrition status (p=0,039) and a significant correlation between fruits and vegetables consumption and nutrition status (p=0,000). There is a correlation between purchasing power, fruits and vegetables consumption, and nutrition status in elementary school students.
Volume: 8
Issue: 1
Page: 70-75
Publish at: 2019-03-01

FPGA implementation of new LM-SPIHT colored image compression with reduced complexity and low memory requirement compatible for 5G

10.11591/ijres.v8.i1.pp1-13
Yasmine M. Tabra , Bayan Mahdi Sabbar
The revolution in 5G mobile systems require changes to how image is handled. These changes are represented by the required processing time, the amount of space for uploading and downloading. In this paper, a development on WT (Wavelet Transform) along with LM-SPIHT (Listless-Modified Set Partitioning in Hierarchical tree) coding and with additional level of Runlength encoding for image compression has been proposed. The new implementation reduces the amount of data needed to be stored in several stages, also the amount of time required for processing. The compression has been implemented using VHDL (Very High Descriptive Language) on netFPGA-1G-CLM Kintex-7 board. The new implementation results show a reduction in the complexity as processing time.
Volume: 8
Issue: 1
Page: 1-13
Publish at: 2019-03-01

Biomedical health monitoring system design and analysis

10.11591/ijeecs.v13.i3.pp1056-1064
Nur Athilah Abdul Rahman , Asral Bahari Jambek
e-Health remote monitoring systems have bloomed rapidly with a myriad of applications. This paper discusses a design of a remote monitoring device for biomedical field. Four biomedical sensors which are electrocardiography (ECG), airflow, galvanic skin response and temperature with two boards which are the e-Health Shield Board V2.0 and Arduino Uno Board are used. The results show satisfactory output for each experiment using two test subjects. The device able to achieve high accuracy where percentage of temperature difference is less than 1% compared to the commercial devices with an average power consumption of each working sensor on board is ≤9W.
Volume: 13
Issue: 3
Page: 1056-1064
Publish at: 2019-03-01

Design of active inductor-based butterworth and chebyshev microwave bandpass filters in standard 0.18µm-CMOS technology

10.11591/ijres.v8.i1.pp27-35
Jarjar Mariem , Pr. EL Quazzani Nabih
In this paper we propose a synthesis of microwave active filters having Butterworth and Chebyshev responses in the frequency range 1GHz-2GHz. The filter fundamental block, used to build an active inductor, consists of CMOS-based Operational Transconductance Amplifier (OTA) circuits. These amplifiers are made out of simple current mirror using MOS transistors. The simulation procedure has been carried out through PSPICE software showing good performances regarding scattering parameters in terms insertion losses, of out-of-band rejection and phase.
Volume: 8
Issue: 1
Page: 27-35
Publish at: 2019-03-01

Performance analysis of malaysian low voltage distribution network under different solar variability days

10.11591/ijeecs.v13.i3.pp1152-1160
Nur Izzati Zolkifr , Chin Kim Gan , Meysam Shamsiri
The widespread of Photovoltaic (PV) systems as one of the distributed generation technologies could have profound impact on the distribution networks operation, particularly on network losses and network voltages fluctuations. This is mainly caused by the high PV penetrations coupled with high solar variability in the countries with large cloud cover. Therefore, this paper presents an investigation on the impact of residential grid-connected PV system by utilizing a typical low voltage (LV) network in Malaysia under various solar variability days. In this study, there are three scenarios; where, each scenario were performed with different levels of PV penetration and five different solar variability days. The impacts of PV system allocation in different scenarios and various solar variability days are assessed in term of voltage unbalance and network losses. The results propose that Scenario 1: randomly allocation of PV systems across the LV network has the lowest voltage unbalance and network losses especially during overcast day
Volume: 13
Issue: 3
Page: 1152-1160
Publish at: 2019-03-01

Performance evaluation of embedded ethernet and Controller Area Network (CAN) in real time control communication system

10.11591/ijres.v8.i1.pp36-50
Ching Chia Leong , Mohamad Khairi Ishak
Real-time communication is important in control network. In real-time communication, message need to be delivered from source to destination within specification. Embedded Ethernet and Controller Area Network (CAN) protocol can be used in control network to achieve hard real-time communication. For embedded Ethernet protocol, Carrier Sense Multiple Access with Collision Detection (CSMA/CD) is the media access control (MAC) used to control data transmission between nodes in network. Back-off algorithm in CSMA/CD is used to handle packet collisions and retransmission. For CAN protocol, it is communication protocol developed mainly for automotive application. It has priority arbitration to handle collisions and retransmission. In this project, embedded Ethernet network models and CAN network models are developed and simulated in MATLAB Simulink software. Several back-off algorithms, which are Binary Exponential Backoff (BEB), Linear Back-off Algorithm, Exponential-Linear back-off Algorithm and Logarithm Back-off Algorithm are proposed and implemented into Embedded Ethernet network model to evaluate the performance. Both embedded Ethernet and CAN network models are extended to 3 nodes, 10 nodes, and 15 nodes to evaluate performance at different network condition. The performance criteria evaluated and discussed are average delay and jitter of packets. The results show that in network with high number of nodes, Linear Back-off Algorithm and Exponential-Linear back-off Algorithm shows improvement in packets delay and jitter. For CAN network, the packet jitter is relatively low.
Volume: 8
Issue: 1
Page: 36-50
Publish at: 2019-03-01

Design of a 60 GHz power amplifier in a 45nm CMOS

10.11591/ijres.v8.i1.pp14-26
Rashmi S. B. , Siva S. Yellampalli
This Paper presents a design and implementation of class-AB power amplifier which works at 60GHz unlicensed frequency band. This power amplifier uses a MOSFET from gpdk45 technology library. The design simulation is done by cadence Analog Design Environment. This proposed power amplifier yields a power added efficiency of 23.45% and a power gain S21 of 10dB at 60GHz. The output impedance of proposed power amplifier is needs to be matched with 73Ω antenna impedance. The S22 output matching of the simulated power amplifier is -18dB at 60GHz. The input side is matched to arbitrary impedance of 50Ω the resulting S11 of simulated result is noted to be -15dB at 60GHz. The proposed circuit has a noise figure of 3.85dB. The proposed circuit has a Pout-1dB of 8.5dBm. the designed class AB power amplifier is an important component in 60GHz transceiver. The layout of the associated circuit is drawn with the total size of 0.107um2.
Volume: 8
Issue: 1
Page: 14-26
Publish at: 2019-03-01

Small signal fault analysis for renewable energy (Wind) power system distributed generation by using MATLAB software (Simulink)

10.11591/ijeecs.v13.i3.pp1337-1344
Ameerul A. J. Jeman , Naeem M. S. Hannoon , Nabil Hidayat , Mohamed.M.H. Adam , Ismail Musirin , Vijayakumar. V
In distribution system, wind power plants are becoming popular renewable energy sources. It employs Doubly Fed Induction Generator (DFIG) to generate power based on wind conversion. Short and long transmission lines, presence of faults and presence of Static Synchronous Compensator (STATCOM) are highlighted issues in this paper. Basically, this research develops investigations on some electrical variables such as voltage and current to control them. Distribution Static Synchronous Compensator (DSTATCOM) is proposed in this paper. Wind farm acts as a source while DSTATCOM is connected to the distribution system with a DFIG based wind farm. The controller proposed is DSTATCOM is modeled and simulated in MATLAB/SIMULINK and the results are given. A microgrid based small signal analysis is performed in the laboratory using MATLAB and different comparisons are made and simulation case studies are presented and validated.
Volume: 13
Issue: 3
Page: 1337-1344
Publish at: 2019-03-01

An overview of designing an induction heating system for domestic applications

10.11591/ijpeds.v10.i1.pp351-356
V Geetha , V Sivachidambaranathan
The inherent benefit of the induction heating system leads to usage in the domestic applications. The design part of the coil has to be accurately manipulated to have highly qualified system. Discussion on the customisation of the coil and the converter section is elaborated such that the design relaying on the load variation, type of coil, rating required for the specified application. Thus the paper discusses about the design requirement on the domestic induction applications, depicting the criteria to be satisfied and the results are verified using the AC-AC converter fed induction heating system with the help of the equivalent circuit of the working coil and the work piece.
Volume: 10
Issue: 1
Page: 351-356
Publish at: 2019-03-01

Design and implementation of nonlinear integral backstepping control strategy for single-phase grid-connected VSI

10.11591/ijpeds.v10.i1.pp19-26
Moussa Reddak , Abdelouahed Mesbahi , Ayoub Nouaiti , Abdelmajid Berdai
This paper presents the design and the implementation of a nonlinear integral backstepping control strategy for a single-phase grid-connected voltage source inverter (VSI). The proposed control strategy aims to resolve the problem of the sinusoidal reference current tracking, to have a rapid transient response needed to deal with the transient incident such as grid voltage drops and to generate into the grid a current with fewer harmonics. These properties are verified by seeking the direction, the amplitude and the transient response of the injected grid current. An experimental VSI prototype is used to validate the effectiveness of the proposed controller, basing on a digital signal processor DSP microcontroller. The achieved results show that the well- obtained properties satisfy the grid current injection conditions.
Volume: 10
Issue: 1
Page: 19-26
Publish at: 2019-03-01

Verilog based efficient convolution encoder and viterbi decoder

10.11591/ijres.v8.i1.pp75-80
Md. Abdul Rawoof , Umasankar Ch. , D. Naresh Kumar , D. Khalandar Basha , N. Madhur
In the today’s digital communication Systems, transmission of data with more reliability and efficiency is the most challenging issue for data communication through channels. In communication systems, error correction technique plays a vital role. In error correction techniques, The capacity of data can be enhanced by adding the redundant information for the source data while transmitting the data through channel. It mainly focuses on the awareness of convolution encoder and Viterbi decoder. For decoding convolution codes Viterbi algorithm is preferred.
Volume: 8
Issue: 1
Page: 75-80
Publish at: 2019-02-11

Design and software characterization of finFET based full adders

10.11591/ijres.v8.i1.pp51-60
Raju Hajare , C. Lakshminarayana
Adder is the most important arithmetic block that are used in all processors. Most of the logical circuits till today were designed using Metal Oxide Semiconductor Field Effect Transistors (MOSFET’s). In order to reduce chip area, leakage power and to increase switching speed, MOSFET’s were continuously scaled down. Further scaling below 45nm, MOSFET’s suffers from Short Channel Effects (SCE’s) which leads to degraded performance of the device. Here the Performance of 28T and 16T MOSFET based 1-bit full adder cell is characterized and compared with FinFET based 28T and 16T 1-bit full adders at various  technology nodes using HSPICE software. Results show that FinFET based full adder design gives better performance in terms of speed, power and reliability compared to MOSFET based full adder designs. Hence FinFET are promising candidates and better replacement for MOSFET.
Volume: 8
Issue: 1
Page: 51-60
Publish at: 2019-02-11

Secured smart ATM transaction

10.11591/ijres.v8.i1.pp61-74
C. R. Balamurugan , K. Ramash kumar , A. Thirumalai
The objective of this paper is to reduce the service tax during mobile transactions. To improve the security and to make the process easy and less time consuming this process is rendered with the help of GSM (Global System for Mobile communication), finger print sensors, PIC16F877A microcontroller and aadhaar number.
Volume: 8
Issue: 1
Page: 61-74
Publish at: 2019-02-11

Wearable antenna gain enhancement using reactive impedance substrate

10.11591/ijeecs.v13.i2.pp708-712
A.N. Suraya , T. Sabapathy , M. Jusoh , N.H. Ghazali , M.N. Osman , S. Ismail , M. R. Awal
A microstrip patch antenna is designed for a wearable antenna. The performance of microstrip patch antenna loaded with reactive impedance surface (RIS) is described in terms of gain, bandwidth and return loss. The antenna is investigated in two conditions which are conventional microstrip antenna with RIS and without RIS. The designed antenna is also aimed at size reduction therefore it will be suitable for a wearable application. This antenna which is made fully using textile and it is designed for operation in the 2.45 GHz band. The performance of microstrip patch antenna loaded with RIS is described in terms of gain, bandwidth, return loss and radiation pattern. The antenna designed with RIS operates at 2.45 GHz. Bandwidth enhancement is achieved with RIS where the designed antenna can cater frequency from 2.4 GHz to 3 GHz. A gain enhancement is achieved of 20% is achieved compared with the conventional patch antenna. Although the size of the patch is reduced with the introduction of RIS, the overall size of the antenna with the substrate is almost similar to the conventional patch antenna. However, the performance of the antenna is greatly enhanced with the use of RIS.
Volume: 13
Issue: 2
Page: 708-712
Publish at: 2019-02-01
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