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29,734 Article Results

Calcium supplementation dose and vegetable intake determine preeclampsia

10.11591/ijphs.v8i1.16411
laila fitriani , Ari Probandari , Budiyanti Wiboworini
Preeclampsia is one of the cause of high maternal mortality rates. Risk factors for preeclampsia include a lack of nutrients such as vitamin A, calcium, sodium and potassium. Calcium intake in pregnant women is not only obtained from calcium supplementation, but also obtained from consumed foods such as vegetables. to analyzed the relationship between calcium supplementation dose and vegetable intake with preeclampsia in third trimester of pregnant women. observational analytic used a prospective cohort design. A total of 65 third trimester pregnant women participated in the study in Bantul, Yogyakarta. The calcium supplementation dose was obtained through interview using a questionnaire, while vegetable intake was obtained through the food frequency and food recall 2x24 hours. 16 third trimester pregnant women experienced preeclampsia. The mean calcium dose consumed per day was 476.2 mg. The average intake of vegetables per day for pregnant women was 250.9 gr. Kaplan-Mier with the log rank method states that there was a significant difference between calcium supplementation dose (p=0.007) and preeclampsia. There was a significant difference between vegetable intake (p=0.007) and preeclampsia. there was a significant relationship between calcium supplementation dose and vegetable intake with preeclampsia in third trimester pregnant women.
Volume: 8
Issue: 1
Page: 76-81
Publish at: 2019-03-01

Modelling volatility of Kuala Lumpur composite index (KLCI) using SV and garch models

10.11591/ijeecs.v13.i3.pp1087-1094
Ezatul Akma Abdullah , Siti Meriam Zahari , S.Sarifah Radiah Shariff , Muhammad Asmu’i Abdul Rahim
It is well-known that financial time series exhibits changing variance and this can have important consequences in formulating economic or financial decisions. In much recent evidence shows that volatility of financial assets is not constant, but rather that relatively volatile periods alternate with more tranquil ones. Thus, there are many opportunities to obtain forecasts of this time-varying risk. The paper presents the modelling volatility of the Kuala Lumpur Composite Index (KLCI) using SV and GARCH models.  Thus, the aim of this study is to model the KLCI stock market using two models; Stochastic Volatility (SV) and Generalized Auto-Regressive Conditional Heteroscedasticity (GARCH). This study employs an SV model with Bayesian approach and Markov Chain Monte Carlo (MCMC) sampler; and GARCH model with MLE estimator. The best model will be used to forecast the future volatility of stock returns. The study involves 971 daily observations of KLCI Closing price index, from 2 January 2008 to 10 November 2016, excluding public holidays. SV model is found to be the best based on the lowest RMSE and MAE values.
Volume: 13
Issue: 3
Page: 1087-1094
Publish at: 2019-03-01

Design and implementation of embedded auto car parking system using FPGA for emergency conditions

10.11591/ijeecs.v13.i3.pp876-883
Khor Jing Yong , Muataz H. Salih
An automatic car parking system using FPGA based on emergency conditions was proposed to detect the driver’s condition and perform specific tasks such as warn the drivers and automatic parking depends on the behavior of the driver. Long journey driving on highway will lead loss of concentration of driver quickly and also cause the driver doze off. Based on statistics, driver tends to fall asleep more on high-speed, long, boring highway. Most crashes occur between 4.00a.m-6.00a.m and midnight 12.00a.m till 2.00a.m. Besides, heart attack during driving will also harm to other road users. The risk of accident will increase due to these conditions. In this paper, automatic car parking system using FPGA based on emergency conditions was proposed to detect the driver’s condition and perform specific tasks such as warn the drivers and automatic parking depends on the behavior of the driver. At the same times, this system can avoid all the obstacles and cars on the road from time to time. Input data management unit was designed as control unit for input data sensors of input and output control. Main processing was designed as speed controller and also the steering controller. Speed controller used to control the speed of vehicle while driving on the road by detecting the obstacles. Steering controller was designed to control automatic car parking and also assisted with sensors around the vehicles. Sensors were tested with many materials so that the system can flexible with any conditions. The total of 1083 logic elements and 676 registers being used in this project and up to 1.6GHz as operating frequency. The complete design is able to avoid obstacles surrounding of host vehicles and parked at a safe area automatically after heart attack of driver detected. Then, GSM send GPS coordination to hospital.
Volume: 13
Issue: 3
Page: 876-883
Publish at: 2019-03-01

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

Vocabulary size, reading motivation, reading attitudes and reading comprehension performance among Filipino college learners of english

10.11591/ijere.v8i1.15335
Rosalyn Gunobgunob-Mirasol
Reading is an indispensable tool in the academic world. Most, if not all, activities in varied collegiate courses entail the act of reading. There are many contributing factors that affect one’s ability to read and comprehend text materials effectively. Two of the many factors are the reader’s vocabulary size and their reading motivation. This study examined the relationship of the vocabulary size, reading strategies and the reading comprehension performance of college learners in a comprehensive university in the Philippines. A correlational analysis was employed to ascertain the relationship between the scores in the reading comprehension component of the course and the vocabulary levels tests by Nation [1]. The findings of this study hope to provide useful insights into the prediction of college learners’ reading performance and the teaching of vocabulary in the ESL context as well as the integration of learners’ reading motivation in the curriculum.
Volume: 8
Issue: 1
Page: 64-70
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

Leadership change design: a professional learning community (PLC) project in eastern Indonesia

10.11591/ijere.v8i1.15662
Teddy Trilaksono , Ambara Purusottama , Ifa Hanifah Misbach , Irfan Hary Prasetya
A professional learning community (PLC) is a long-term sustainable program that can replace professional development (PD) to enable teachers to become teacher leaders and school principals to become instructional leaders. Using a case study from the establishment of the PLC project in 10 schools of Eastern Indonesia (Saparua island, Maluku), this research develops a progressive leadership change model through an ADDIE instructional design that changes school leadership. The research aims to investigate how to identify the most effective leadership change model by exploring differrent forms of learning communities between school principals and teachers. Using an action research approach to solve the problem, the data were collected over a 10-month period when the PLC project activities took place and embedded them as empirical materials that complement each other. The findings show that the leadership change design through PLC runs effectively if value alignment occurs between school principals and teachers after the open environment is established. The data also highlight that aligned values must be embedded as school identities, whereas a school principal must act as a change leader in order to ensure that these changes are sustainable. This study concludes by proposing policy recommendations for policy makers and education stakeholders on how to develop PD and PLC in Indonesian schools.
Volume: 8
Issue: 1
Page: 47-56
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

Cartoon to solve teaching problem on mathematics

10.11591/ijere.v8i1.17609
Yasin Gokbulut , Sultan Kus
The aim of this study is to determine the effect of mathematics teaching with cartoons on the problem solving skills of primary school 2nd grade students based on addition and substraction. In the research, pretest-posttest control group design of the experimental model was used. In the classroom where the experimental group students were present, cartoon supported education was applied and the current program based teaching method was used in the control group class. The target population of the study consisted of 2nd grade students of all primary schools of the Ministry of National Education of Mersin. The population of the study consisted of 2nd grade students of all primary schools of the Ministry of National Education of Mersin. The study was conducted for 4 weeks in the fall semester of the 2015-2016 academic year. The experimental group consisted of 17 students and the control group consisted of 13 students. In order to determine the validity and reliability of the achievement test used in the study, item analysis was performed with the TAB program. The t-test was used to determine whether there was a significant difference between the pre-test and post-test scores of the groups. As a result of the research, it was observed that the success of the students in the problem solving in addition and substraction education has increased.
Volume: 8
Issue: 1
Page: 145-150
Publish at: 2019-03-01

An enhanced hybridized artificial bee colony algorithm for optimization problems

10.11591/ijai.v8.i1.pp87-94
Xingwang Huang , Xuewen Zeng , Rui Han , Xu Wang
Artificial bee colony (ABC) algorithm is a popular swarm intelligence based algorithm. Although it has been proven to be competitive to other population-based algorithms, there still exist some problems it cannot solve very well. This paper presents an Enhanced Hybridized Artificial Bee Colony (EHABC) algorithm for optimization problems. The incentive mechanism of EHABC includes enhancing the convergence speed with the information of the global best solution in the onlooker bee phase and enhancing the information exchange between bees by introducing the mutation operator of Genetic Algorithm to ABC in the mutation bee phase. In addition, to enhance the accuracy performance of ABC, the opposition-based learning method is employed to produce the initial population. Experiments are conducted on six standard benchmark functions. The results demonstrate good performance of the enhanced hybridized ABC in solving continuous numerical optimization problems over ABC GABC, HABC and EABC.
Volume: 8
Issue: 1
Page: 87-94
Publish at: 2019-03-01
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