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30,735 Article Results

Stochastic Computing Correlation Utilization in Convolutional Neural Network Basic Functions

10.12928/telkomnika.v16i6.8955
Hamdan; Universiti Teknologi Malaysia Abdellatef , Mohamed Khalil; Universiti Teknologi Malaysia Hani , Nasir Shaikh; Universiti Teknologi Malaysia Husin , Sayed Omid; Universiti Teknologi Malaysia Ayat
In recent years, many applications have been implemented in embedded systems and mobile Internet of Things (IoT) devices that typically have constrained resources, smaller power budget, and exhibit "smartness" or intelligence. To implement computation-intensive and resource-hungry Convolutional Neural Network (CNN) in this class of devices, many research groups have developed specialized parallel accelerators using Graphical Processing Units (GPU), Field-Programmable Gate Arrays (FPGA), or Application-Specific Integrated Circuits (ASIC). An alternative computing paradigm called Stochastic Computing (SC) can implement CNN with low hardware footprint and power consumption. To enable building more efficient SC CNN, this work incorporates the CNN basic functions in SC that exploit correlation, share Random Number Generators (RNG), and is more robust to rounding error. Experimental results show our proposed solution provides significant savings in hardware footprint and increased accuracy for the SC CNN basic functions circuits compared to previous work.
Volume: 16
Issue: 6
Page: 2835-2843
Publish at: 2018-12-01

Transfer Function, Stabilizability, and Detectability of Non-autonomous Riesz-spectral Systems

10.12928/telkomnika.v16i6.10112
Sutrima; Sebelas Maret University Sutrima , Christiana Rini; Gadjah Mada University Indrati , Lina; Gadjah Mada University Aryati
Stability of a state linear system can be identified by controllability, observability, stabilizability, detectability, and transfer function. The approximate controllability and observability of non-autonomous Riesz-spectral systems have been established as well as non-autonomous Sturm-Liouville systems. As a continuation of the establishments, this paper concern on the analysis of the transfer function, stabilizability, and detectability of the non-autonomous Riesz-spectral systems. A strongly continuous quasi semigroup approach is implemented. The results show that the transfer function, stabilizability, and detectability can be established comprehensively in the non-autonomous Riesz-spectral systems. In particular, sufficient and necessary conditions for the stabilizability and detectability can be constructed. These results are parallel with infinite dimensional of autonomous systems.
Volume: 16
Issue: 6
Page: 3024-3033
Publish at: 2018-12-01

Statistical Tuning Chart for Mapping Porosity Thickness: a Case Study of Channel Sand Bodies in the Kutei Basin Reservoir

10.12928/telkomnika.v16i6.9660
Abdul; Universitas Indonesia Haris , Agus; Universitas Indonesia Riyanto , Sri; Universitas Indonesia Mardiyati
Reservoir assessment is not only controlled by the structural framework but also stratigraphical features. Stratigraphical interpretation, which is related to seismic amplitude interpretation, is used to describe petrophysical aspects of channel sand reservoirs such as net porosity and thickness. This paper aims to map the porosity thickness for a case study of channel sand bodies reservoir in the Kutei basin. The study area is complex channel reservoir system that appears to occupy specific area within the depositional system. The geometry of the sediment channel, which thins toward the channel margins, makes this feature similar to be wedge model that could possibly be influenced by tuning effects. The tuning effects introduce pitfall in interpreting high-quality reservoir that is affected by contrasts in acoustic impedance. In order to distinguish high amplitude responses caused by tuning effects and acoustic properties, the analysis of amplitude responses needs to be correlated to the reservoir thickness. The statistical tuning chart is one of the techniques used to correlate amplitude responses and the reservoir thickness. The application of this technique to real data sets shows net porosity thickness map over the targeted reservoir. Thus, high-quality reservoir characterization can be performed to delineate geometric framework of the reservoir.
Volume: 16
Issue: 6
Page: 2676-2682
Publish at: 2018-12-01

A Compact Reconfigurable Dual Band-Notched Ultra-Wideband Antenna using Varactor Diodes

10.12928/telkomnika.v16i6.11552
Sam Weng; Universiti Teknikal Malaysia Melaka (UTeM) Yik , Zahriladha; Universiti Teknikal Malaysia Melaka (UTeM) Zakaria , Herwansyah; Universiti Teknikal Malaysia Melaka (UTeM) Lago , Noor Azwan; Universiti Teknikal Malaysia Melaka (UTeM) Shairi
In this paper, a reconfigurable dual band-notched ultra-wideband (UWB) antenna is presented. The antenna design consists of a circular shape with two pairs of the L-resonator. To realize the notch characteristics in WLAN at 5.2 GHz and 5.8 GHz bands, the half wavelength of the L-resonator is introduced in the design. The T-shaped notch is etched in the ground to enhance the bandwidth which covers the UWB operating frequency range from 3.219 – 10.863 GHz. The proposed reconfigurable dual band-notched UWB antenna shows good impedance matching for the simulated in the physical layout. Furthermore, the proposed antenna has a compact size of 37.6 x 28 mm2. This proposed reconfigurable design can provide an alternative solution for the wireless system in the designing of a band-notched antenna with a good tuning capability.
Volume: 16
Issue: 6
Page: 2557-2562
Publish at: 2018-12-01

Particle Filter with Integrated Multiple Features for Object Detection and Tracking

10.12928/telkomnika.v16i6.9466
Muhammad; Institut Teknologi Sepuluh Nopember Attamimi , Takayuki; The University of Electro-Communications Nagai , Djoko; Institut Teknologi Sepuluh Nopember Purwanto
Considering objects in the environments (or scenes), object detection is the first task needed to be accomplished to recognize those objects. There are two problems needed to be considered in object detection. First, a single feature based object detection is difficult regarding types of the objects and scenes. For example, object detection that is based on color information will fail in the dark place. The second problem is the object’s pose in the scene that is arbitrary in general. This paper aims to tackle such problems for enabling the object detection and tracking of various types of objects in the various scenes. This study proposes a method for object detection and tracking by using a particle filter and multiple features consisting of color, texture, and depth information that are integrated by adaptive weights. To validate the proposed method, the experiments have been conducted. The results revealed that the proposed method outperformed the previous method, which is based only on color information.
Volume: 16
Issue: 6
Page: 3008-3015
Publish at: 2018-12-01

Design of Dual Band Microstrip Antenna for Wi-Fi and WiMax Applications

10.12928/telkomnika.v16i6.10016
Raad H.; Almustansiryiah University Thaher , Zainab S.; Almustansiryia University Jamil
 In this paper, a dual band rectangular microstrip patch antenna with microstrip line is presented. The proposed antenna is designed on FR4 substrate with thickness 1.5 mm and relative permittivity 4.3. The antenna is designed to operate at 2.4/5.8 GHz bands for Wi-Fi/WiMax applications. The obtained return loss is -32.77dB at 2.4 GHz with 7.4% bandwidth and -25.955 dB at 5.8 GHz with 8.17% bandwidth. The practical and simulation result are computed. It is noted that there is a good agreement between the simulation and measured result (using vector network analyzer (VNA)).
Volume: 16
Issue: 6
Page: 2864-2870
Publish at: 2018-12-01

Elliptical BandPassThree Dimensional Frequency Selective Surface with Multiple Transmission Zeros

10.11591/ijeecs.v12.i3.pp1020-1029
Bimal Raj Dutta , Binod Kumar Kanaujia , Chhaya Dalela
An elliptic band pass response three-dimensional Frequency Selective Surface (3D FSS) is designed from a single unit cell of 2D array of two shielded microstrip lines. The designed FSS provides pseudo-elliptic band-pass frequency response (5.4 – 9.6) GHz with its application in long-distance radio telecommunications and space communications etc. The four transmission zeros at 5.4GHz, 9.6GHz, 12.4GHz and 15GHz provides wide out-of-band frequency rejection. The 3D FSS is independent of the variations in the incident angle of the plane wave up to 60 degree. Each unit cell is a combination of two shielded microstrip lines with one having an air gap and the other one having in between rectangular metallic plate. When a TE polarized plane wave incidents perpendicular to the perfect electric conductor (PEC) boundary walls shielded microstrip lines, it results in two quasi-TEM modes namely air and substrate mode. The 3D FSS consists of multiple resonators with a multimode cavity having number of propagating modes. These resonating modes in phase provide transmission poles and when out of phase give transmission zeros. The 3D FSS structure is simulated using Ansys HFSS software with improved performance over 2DFSS, for many practical applications such as antenna sub-reflector, radomes and spatial filters.
Volume: 12
Issue: 3
Page: 1020-1029
Publish at: 2018-12-01

Assessment of Internet Banking Services Continued Use: Role of Socio-Cognitive and Relational View

10.12928/telkomnika.v16i6.4059
Mira; International Islamic University Malaysia Kartiwi , Ali; Misurata University Rfieda
Recently, continued use of information systems in general and particularly the context of internet banking has drawn increasing attention both in academic and trade literatures. However, different perspectives that determine the continued use of internet banking has been addressed. Given the long-term goal of any business entity is to increase its productivity, expand its customer base and maximize revenues, it is crucial for banks offering internet banking services to focus on encouraging their customers to continually use internet banking. While emerging attention had been given on the assessment of continued use of internet banking services from single view, little of attention were given from researchers to combine different views in a single comprehensive model. Yet, it is believe that combining different views would provide a better understanding to the issues surrounding the continued use. Drawing on the literature, this study developed a model to determine factors that influence the continued use of internet banking by combining factors from the socio-cognitive view and the relational view. Using a survey questionnaire, 450 questionnaires were distributed to users of internet banking in Libya. A number of interesting findings emerged, among others, is the lack of association between trust and perception to continue using the internet banking services in Libya.
Volume: 16
Issue: 6
Page: 2817-2827
Publish at: 2018-12-01

Underwater Image De-nosing using Discrete Wavelet Transform and Pre-Whitening Filter

10.12928/telkomnika.v16i6.9236
Mohanad Najm; University of Technology Abdulwahed , Ali Kamil; University of Technology Ahmed
Image denoising and improvement are essential processes in many underwater applications. Various scientific studies, including marine science and territorial defence, require underwater exploration. When it occurs underwater, noise power spectral density is inconsistent within a certain range of frequency, and the noise autocorrelation function is not a delta function. Therefore, underwater noise is characterised as coloured noise. In this study, a novel image denoising technique is proposed using discrete wavelet transform with different basis functions and a whitening filter, which converts coloured noise characteristics to white noise prior to the denoising process. Results of the proposed method depend on the following performance measures: peak signal-to-noise ratio (PSNR) and mean squared error. The results of different wavelet bases, such as Debauchies, biorthogonal and symlet, indicate that the denoising process that uses a pre-whitening filter produces more prominent images and better PSNR values than other methods.
Volume: 16
Issue: 6
Page: 2622-2629
Publish at: 2018-12-01

Hybrid Filter Scheme for Optimizing Indoor Mobile Cooperative Tracking System

10.12928/telkomnika.v16i6.10162
Rafina Destiarti; Institut Teknologi Telkom Purwokerto Ainul , Prima; Politeknik Elektronika Negeri Surabaya Kristalina , Amang; Politeknik Elektronika Negeri Surabaya Sudarsono
The precise indoor tracking system using Xbee signal strength protocol has become a potential research to the WSN applications. The main aspects for the success tracking system is accuracy performance based on location estimation. The improvement of location estimation is complicated issue, especially using RSSI with low accuracy due to the signal attenuation from multipath effect at indoor propagation. Hence, many existing research typically focused on specific methods for providing improvement schemes at tracking system area. Then, we propose hybrid filter schemes, including extended gradient filter (EGF) for filtering noise signal based distance modification, and modified extended Kalman filter (MIEKF) will be combined with trilateration for filtering the error position estimation. Using mobile cooperative tracking scenario refers to our previous work, the proposed hybrid filter scheme which is called modified iterated extended gradient Kalman filter (MIEGKF) can optimize the error estimation around 41.28% reduction with 0.63 meters MSE (mean square error) value.
Volume: 16
Issue: 6
Page: 2536-2548
Publish at: 2018-12-01

Accelerating Compression Time of the standard JPEG by Employing The Quantized YCbCr Color Space Algorithm

10.11591/ijece.v8i6.pp4343-4351
Trini Saptariani , Sarifudin Madenda , Ernastuti Ernastuti , Widya Silfianti
In this paper, we propose a quantized YCbCr color space (QYCbCr) technique which is employed in standard JPEG. The objective of this work is to accelerate computational time of the standard JPEG image compression algorithm. This is a development of the standard JPEG which is named QYCBCr algorithm. It merges two processes i.e., YCbCr color space conversion and Q quantization in which in the standar JPEG they were performed separately. The merger forms a new single integrated process of color conversion which is employed prior to DCT process by subsequently eliminating the quantization process. The equation formula of QYCbCr color coversion is built based on the chrominance and luminance properties of the human visual system which derived from quatization matrices. Experiment results performed on images of different sizes show that the computational running time of QYCbCr algorithm gives 4 up to 8 times faster than JPEG standard, and also provides higher compression ratio and better image quality.
Volume: 8
Issue: 6
Page: 4343-4351
Publish at: 2018-12-01

Factors Influencing Cloud Computing in Telecommunications Companies

10.11591/ijeecs.v12.i3.pp1334-1339
Raed Wishah , Marwan Al-Nsour , Malek Alharafsheh , Saleh AlKhalaileh , Farah Alshbeekat
This study aims to identify the role of cloud computing in achieving success in e-governance in Jordan. This paper investigates the effect of four accomplishment aspects (availability, flexibility, cost saving and scalability) for executing cloud computing technology in telecommunication companies on Jordan e-governance implementation. A questionnaire was developed to collect data from respondents working for the three-main public mobile telephone network operators: Zain, Orange and Umniah. The Statistical Package for Social Sciences program was used in the descriptive analysis of the responses. The results show that all four success factors have a high level of impact, separately and together, on e-governance in Jordan. Cost saving has the highest impact, followed by scalability, availability and flexibility. Based on these results, the study makes some suggestions for further research that could enrich understanding of the implementation of cloud computing and its effect on egovernance in Jordan.
Volume: 12
Issue: 3
Page: 1334-1339
Publish at: 2018-12-01

Stress, Nutritional Status and Blood Glucose Levels among Patients with Diabetes Mellitus Type 2

10.11591/ijphs.v7i4.14914
Dyah Ayu Kusuma Wardani , Sugiarto Sugiarto , Risya Cilmiaty
Prevalence of diabetes mellitus (DM) was increased significantly. Stress increased cortisol could increase blood glucose levels while obesity could increase insulin resistance. Objective of this study was to examine correlation of stress and nutritional status with blood glucose levels in patients with DM type 2. Design study was cross sectional using 120 samples from patients with DM type 2 at Polyclinic of Internal Disease Dr. Moewardi Hospital Surakarta during April-May 2018. Variables in this study were stress with perceived stress scale 10 items (PSS-10), nutritional status with body mass index (BMI) and blood glucose levels with fasting blood glucose (FBG) and post-prandial blood glucose (PPBG) examination. The results showed that mean of FBG was 152.9±63.66 mg/dL and PPBG was 213.96±70.17 mg/dL. There was no significant correlation between stress and blood glucose levels, by FBG (p=0.389) and PPBG (p=0.202). However, there was significant correlation between nutritional status and PPBG (p=0.016), but FBG was not significant (p=0.209). In conclusion, there was significant correlation between nutritional status and PPBG in patients with DM type 2, but FBG was not significant. However, there was no significant correlation between stress and blood glucose levels in patients with DM type 2.
Volume: 7
Issue: 4
Page: 283-288
Publish at: 2018-12-01

An Accurate and Efficient Scheduler for Hadoop MapReduce Framework

10.11591/ijeecs.v12.i3.pp1132-1142
D C Vinutha , G.T Raju
MapReduce is the preferred computing framework used in large data analysis and processing applications. Hadoop is a widely used MapReduce framework across different community due to its open source nature. Cloud service provider such as Microsoft azure HDInsight offers resources to its customer and only pays for their use. However, the critical challenges of cloud service provider is to meet user task Service level agreement (SLA) requirement (task deadline). Currently, the onus is on client to compute the amount of resource required to run a job on cloud. This work present a novel makespan model for Hadoop MapReduce framework namely OHMR (Optimized Hadoop MapReduce) to process data in real-time and utilize system resource efficiently. The OHMR present accurate model to compute job makespan time and also present a model to provision the amount of cloud resource required to meet task deadline. The OHMR first build a profile for each job and computes makespan time of job using greedy approach. Furthermore, to provision amount of resource required to meet task deadline Lagrange Multipliers technique is applied. Experiment are conducted on Microsoft Azure HDInsight cloud platform considering different application such as text computing and bioinformatics application to evaluate performance of OHMR of over existing model shows significant performance improvement in terms of computation time. Experiment are conducted on Microsoft Azure HDInsight cloud. Overall good correlation is reported between practical makespan values and theoretical makespan values.
Volume: 12
Issue: 3
Page: 1132-1142
Publish at: 2018-12-01

Knowledge and Attitudes on Fetal Anomalies among Pregnant Women in Teaching Hospital Mahamodara, Galle

10.11591/ijphs.v7i4.14234
K.T.G. Kanchana , P. Youhasan
Fetal anomalies significantly contribute towards neonatal mortality worldwide. In Sri Lanka major cause for neonatal deaths is fetal anomalies 41%. A Descriptive cross-sectional study was conducted in Antenatal clinic, Teaching Hospital, Mahamodara. An interviewer-administered, pretested questionnaire was used. Hundred and fifty pregnant women participated in this study. Majority; 105 (70%) were found in the age of below 30 years, and 80 (53.3%) educated up to G.C.E. Ordinary Level. 83 (53.3%) were multigravida and 93(62%) were planned pregnancies. Higher proportion of the participants; 92(61%) , 88(56.7%) and 123(82%) had good knowledge on the risk factors, pre conception care and on preventive actions related to birth defects respectively. Significant proportion (26.7%) had poor knowledge regarding birth defects. There are 143 (95.3%) of the participants interested to know more information on birth defects, 72% believed birth defects were due to evil spirits. Even though 52% of women did not want to terminate their pregnancy if they had a fetus with anomalies, 80.7% of them opined that the termination of pregnancy with birth defected should be legalized. The educational level, parity and planning of current pregnancy of the participants were significantly correlated (p < 0.05) with their knowledge on pre conception care, preventive actions, knowledge on risk factors on birth defects.
Volume: 7
Issue: 4
Page: 231-235
Publish at: 2018-12-01
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