Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

29,734 Article Results

The antecedent of citizen intention use of e-government service

10.12928/telkomnika.v17i1.11588
Taqwa; STMIK AMIKOM Purwokerto Hariguna , Chung-Wen; Southern Taiwan University Hung , Husni Teja; Universitas Islam Negeri Syarif Hidayatullah Jakarta Sukmana
The purpose of this study was to integrate citizen perceived value into an expectation- confirmation model (ECM) and to explain citizen intention use of e-government services. After reviewing both ECM and citizen perceived values, integrated models were designed. This study was compared to the basic ECM; this study revealed that the integration of ECM with citizen perceived value can provide a concerted solution to illustrate some factors and how it can influence citizen intention use for e-government services.
Volume: 17
Issue: 1
Page: 202-209
Publish at: 2019-02-01

A study of reflection phase of reflectarray antennas with high loss organic substrates

10.11591/ijeecs.v13.i2.pp773-778
M. Y. Ismail , H. I Malik , S. R. Masrol , Sharmiza Adnan
This paper presents an analysis of reflection phase of reflectarray antenna based on high loss organic substrate material. Paper substrate material derived from recycled materials was characterized for dielectric material properties. The material shows excellent dielectric material properties with permittivity of 1.63 and loss tangent of 0.048. Effect of substrate height variation over the reflection phase has been discussed. Full wave analysis of the simulated model depicts that the reduction in substrate height after a certain point results in reflection phase distortion of reflectarray element. Validation of the results has been done by simulation, fabrication and scattering parameters measurements of a rectangular patch element on proposed substrate material. The results show a broadband frequency response of 355 MHz and a phase range of 301º at a phase gradient of 0.14 º/MHz.
Volume: 13
Issue: 2
Page: 773-778
Publish at: 2019-02-01

Antenna for humidity sensor using split ring resonator

10.11591/ijeecs.v13.i2.pp584-590
Siti Aminah Md Akhir , Siti Zuraidah Ibrahim , Nurshamimi Rosli , Aini Syuhada Md Zain , Nurehansafwanah Khalid
This paper presents an antenna as a humidity sensor application to control and monitor the quality of humidity. A passive sensor tag with low cost solution is suggested where it implemented on a low-cost substrate, FR4.  A capacitive sensor that works from 0 to 1.5 GHz is implemented in the design. The capacitive sensor is designed based on a small antenna loaded with a Split ring resonator (SRR). To sense the humidity, the SRR resonator is coated with Kapton, placed on the top of the resonator. To validate the proposed method, a prototype was fabricated. The comparison between simulated and measured reflection coefficient is presented.
Volume: 13
Issue: 2
Page: 584-590
Publish at: 2019-02-01

Performance comparison of transmitting jumbo frame on Windows and Linux System

10.12928/telkomnika.v17i1.11627
Supriyanto; Universitas Sultan Ageng Tirtayasa Praptodiyono , Rian; Universitas Sultan Ageng Tirtayasa Sofhan , Anggoro S.; Universitas Sultan Ageng Tirtayasa Pramudyo , Teguh; Universitas Sultan Ageng Tirtayasa Firmansyah , Azlan; Universiti Sains Malaysia Osman
IPv6 is the successor of IPv4, the current Internet Protocol that runs out its address. It offers some improvements including simpler header format and extension header resulting in faster transmission of IP packets. However, IPv6 is a network layer protocol that requires lower layer services. IP packets from the network layer pass to data link layer to be encapsulated by layer 2 headers and trailer to become frames. Ethernet is the most widely used data link layer protocol in the current network devices. The technology is always improved to support high speed transmission. However, from standard Ethernet until ten gigabit Ethernet, the size of MTU remains unchanged at 1500 Bytes. This prevents the network from gaining an optimum performance on transmitting IP packets and operating systems cannot take full advantage of the high-speed performance of Gigabit Ethernet. This research aims to implement the transmission of IPv6 packets using jumbo frame on a test-bed environment. The implementation can be used to justify the impact of jumbo frame on the network as well as operating systems performance. The results prove that the OS used on implementation of jumbo frame affects on the network performance. The highest percentage of increasing throughput is 33.6% when both sender and receiver are running Windows. The decreasing delay by 54.36% was happened when using Linux in sender and Windows in receiver.
Volume: 17
Issue: 1
Page: 68-75
Publish at: 2019-02-01

Comparative study of selected subcarrier index modulation OFDM schemes

10.12928/telkomnika.v17i1.10317
Rawaa J.; Al-Nahrain University Hasan , Hikmat N.; Al-Nahrain University Abdullah
Orthogonal frequency division multiplexing with subcarrier index modulation (SIM-OFDM) is recently proposed to enhance the performance of traditional OFDM. By incorporating the index modulation in OFDM, the data can be sent on the indices of subcarriers as well as the subcarriers themselves reducing the system complexity. In addition, the Peak to Average Power Ratio (PAPR) and Inter Carrier Interference (ICI) can be reduced by switching on /off some OFDM subcarriers in OOK fashion. In this paper, a comparative study of OFDM with SIM_OFDM and Enhanced SIM_OFDM methods in terms of complexity, spectral efficiency and bit error rate over AWGN channel using two power policies is presented. The simulation results showed that at bit error rate of 10-3, SIM_OFDM and ESIM_OFDM achieved gains in Eb/No of 1.1 dB and 2 dB over 4-QAM OFDM respectively under power reallocation policy. However, the results also showed that traditional OFDM has better spectral efficiency compared to both SIM_OFDM and ESIM_OFDM especially at high M-ary orders.
Volume: 17
Issue: 1
Page: 15-22
Publish at: 2019-02-01

Digital book for assessment and evaluation courses based on Kvisoft-kelase asynchronous pattern

10.12928/telkomnika.v17i1.9764
Dewa Gede Hendra; Universitas Pendidikan Ganesha Divayana , Nyoman; Universitas Pendidikan Ganesha Santiyadnya , I Gede; Universitas Pendidikan Ganesha Ratnaya , I Gede; Universitas Pendidikan Ganesha Sudirtha , Suratmin; Universitas Pendidikan Ganesha Suratmin , I Putu; Universitas Pendidikan Ganesha Darmayasa
This study was conducted with the aim of obtaining information about the design of assessment and evaluation digital book as well as deployment process of the digital book through asynchronous patterns. This study uses development method with the 4D design which focuses only on define and design phase. Parties involved in conducting design trial consist of two experts namely expert of education evaluation and expert of informatics engineering education, with a trial tool in the form of questionnaires. The technique was used to analyze the trial results data from those experts was descriptive quantitative with descriptive percentages calculation. In this research, the design result of assessment and evaluation digital book with Kvisoft Flipbook Maker and the initial design of deployment with an kelase asynchronous pattern are included in the good category with a percentages of 89.38% based on experts review.
Volume: 17
Issue: 1
Page: 328-336
Publish at: 2019-02-01

Focused crawling from the basic approach to context aware notification architecture

10.11591/ijeecs.v13.i2.pp492-498
Venugopal Boppana , Sandhya P
The large and wide range of information has become a tough time for crawlers and search engines to extract related information. This paper discusses about focused crawlers also called as topic specific crawler and variations of focused crawlers leading to distributed architecture, i.e., context aware notification architecture. To get the relevant pages from a huge amount of information available in the internet we use the focused crawler. This can bring out the relevant pages for the given topic with less number of searches in a short time. Here the input to the focused crawler is a topic specified using exemplary documents, but not using the keywords. Focused crawlers avoid the searching of all the web documents instead it searches over the links that are relevant to the crawler boundary. The Focused crawling mechanism helps us to save CPU time to large extent to keep the crawl up-to-date.
Volume: 13
Issue: 2
Page: 492-498
Publish at: 2019-02-01

Development of wireless and intelligent home automation system

10.12928/telkomnika.v17i1.9075
Khalil Azha Mohd; Universiti Teknikal Malaysia Melaka Annuar , Muhammad Faiq; Universiti Teknikal Malaysia Melaka Maharam , Nik Azran Ab; Universiti Teknikal Malaysia Melaka Hadi , Mohamad Haniff; Universiti Teknikal Malaysia Melaka Harun , Mohd Firdaus Mohd Ab; Universiti Teknikal Malaysia Melaka Halim
The Intelligent Home Automation System (IHAS) is usually a cell phone web-based application that enables end users in order to keep track of in addition to manage home/office appliance using their mobile system. The main objective of this system is developed to facilitate home users, especially domestic electrical appliances with simple controls. In addition, it can save the cost of electricity for lighting can be controlled to suit the user. Generally, most home appliances controlled from a distance using a remote control. Has created a system for controlling home lighting from a certain distance, which replaces the remote control using mobile smartphone. To make the smartphone to function as a remote control, an application was developed using Android technology. App Inventor software used for designing applications intended. Hardware microcontroller Arduino UNO R3 which is used to connect the smartphone to the electrical equipment. The system has been tested by developing a mini model and take into account the situation in the domestic home. The test is based on the level of control for wirelessly using Bluetooth and the distance between the lamp and the smartphone. The results of this test, the system can be used on equipment or other home appliances for the purpose of controlling or adjustment. In addition, the security system was also highlighted in a typical system, using the global system for mobile (GSM), it can be warned and notified to the consumer where there is a gas leak or the presence of a person in the vicinity of the residence.
Volume: 17
Issue: 1
Page: 32-38
Publish at: 2019-02-01

Simulation of mixed-load testing process in an electronic manufacturing company

10.12928/telkomnika.v17i1.10146
Hayati Mukti; Universitas Ahmad Dahlan Universiti Teknikal Malaysia Melaka Asih , Chong Kuan; Universiti Teknikal Malaysia Melaka Eng , Lee Mei; Universiti Teknikal Malaysia Melaka Ph'ng
The automatic testing machine, called by mixed-load tester, has ability to load and test multiple product families in different testing durations simultaneously. However, the high product mixes for each product family undergoes a different process flow. In addition, the capability of the robot inside tester used for loading and unloading a product to each slot makes the capacity planning problem more complicated. It effects low tester utilization. This paper developed simulation models of capacity planning scenarios under demand and testing time uncertainty. These scenarios are built by robust optimization to handle worst case condition. The result shows the proposed solutions gives better tester utilization and improves the decision making process by providing more detailed and precise information about capacity planning under uncertainties that was not available in company`s current method. To the best of our knowledge, this developed model is the first one considering the mixed–load tester under uncertainties.
Volume: 17
Issue: 1
Page: 408-416
Publish at: 2019-02-01

Integrating fuzzy logic and genetic algorithm for upwelling prediction in Maninjau Lake

10.12928/telkomnika.v17i1.11605
Muhammad; STMIK Asia Malang Rofiq , Yogie Susdyastama; STMIK Asia Malang Putra , Wayan Firdaus; Universitas Brawijaya Mahmudy , Herman; Universitas Brawijaya Tolle , Ida; STMIK Asia Malang Wahyuni , Philip Faster Eka; STMIK Asia Malang Adipraja , Hafrijal; Universitas Bung Hatta Syandri
Upwelling is a natural phenomenon related with the increase in water mass that also occurs in Maninjau Lake, West Sumatra. The upwelling phenomenon resulted in considerable losses for freshwater fish farming because make mass mortalities of fish in farming using the method of floating net cages (karamba jaring apung/KJA). It takes a system that can predict the possibility of upwelling as an early warning to the community, especially fish farming to immediately prepare early anticipation of upwelling prevention. With historical water quality monitoring data at six sites in Maninjau Lake for 17 years, a prediction model can be made. There are three input criteria for Tsukamoto FIS that is water temperature, pH, and dissolve oxygen (DO). The model is built with fuzzy logic integration with the genetic algorithm to optimize the membership function boundaries of input and output criteria. After the optimization, hybrid Tsukamoto FIS and genetic algorithm successfully make a correct upwelling prediction on of 16 data with 94% accuracy.
Volume: 17
Issue: 1
Page: 226-234
Publish at: 2019-02-01

Recent development in electronic nose data processing for beef quality assessment

10.12928/telkomnika.v17i1.10565
Riyanarto; Institut Teknologi Sepuluh Nopember Sarno , Dedy Rahman; Telkom University Wijaya
Beef is kind of perishable food that easily to decay. Hence, a rapid system for beef quality assessment is needed to guarantee the quality of beef. In the last few years, electronic nose (e-nose) is developed for beef spoilage detection. In this paper, we discuss the challenges of e-nose application to beef quality assessment, especially in e-nose data processing. We also provide a summary of our previous studies that explains several methods to deal with gas sensor noise, sensor array optimization problem, beef quality classification, and prediction of the microbial population in beef sample. This paper might be useful for researchers and practitioners to understand the challenges and methods of e-nose data processing for beef quality assessment.
Volume: 17
Issue: 1
Page: 337-348
Publish at: 2019-02-01

Reference broadcast synchronization and time division multiple access implementation on WSN

10.12928/telkomnika.v17i1.11615
Sabriansyah Rizqika; University of Brawijaya Akbar , Mochammad Hannats Hanafi; University of Brawijaya Ichsan , Aulia Arif; University of Brawijaya Darmawan
Various kinds of technology have been developed to assist obtain information. One of them is a Wireless Sensor Network (WSN). WSN is a wireless network consisting of multiple nodes connected wirelessly. WSN nodes on a device have small resources in the form of batteries. The main problem which owned by WSN was in the data collection process possible collisions data, there are nodes that transmit data at the same time. Time Division Multiple Access (TDMA) was able to provide data on the delivery schedule of each node. So no nodes that transmit data at the same time. But in order to apply the system each node should have equal time. One method that able to provide equalization time was Reference Broadcast Synchronization (RBS). This method synchronizes multiple nodes that have different local time (on the receiver) with the help of node that provides synchronization marks (beacons). Hence this each node was able to transmit data in accordance with the TDMA method that has been implemented. In addition time synchronization performed using RBS give equal time with accuracy up to microseconds. That case certainly makes the WSN node able to provide accurate information to guarantee the absence of errors due to data collisions. This research succesfully sending data delivery schedule by time slots that provided by RBS and time synchronization by TDMA average time delay 2285.9 microseconds.
Volume: 17
Issue: 1
Page: 291-298
Publish at: 2019-02-01

Ontology design based on data family planning field officer using OWL and RDF

10.12928/telkomnika.v17i1.9237
Rolly Maulana; Politeknik Pos Indonesia, Indonesia Awangga , Setiawan; STIKOM Dinamika Bangsa, Indonesia Assegaff , Syafrial Fachri; Politeknik Pos Indonesia, Indonesia Pane , Muhammad Firman; Politeknik Pos Indonesia, Indonesia Kahfi
Population density in Indonesia is ranked fourth in the world. The impact of a large population will affect the level of welfare of the community to decrease, and the number of unemployment is increasing so that the state makes Family Planning Program (PLKB) to control the rate of population growth. Problems in the PLKB program are on knowledge management and mapping from data contraception, counseling and planning so that this research using Ontology method will aim to do mapping with knowledge management and Ontology design shows represented data to relate and describes the resources contained in family planning data. This research approach the representation of ontology that is validated through model transformation from family planning data to ontology design using OWL and RDF which are useful for data processing and representing data to be utilized by field officers in educating the public and eradicating negative issues about family planning programs
Volume: 17
Issue: 1
Page: 161-169
Publish at: 2019-02-01

A multi-instance multi-sample palmprint identification system

10.11591/ijeecs.v13.i2.pp825-830
Thulfiqar H. Mandeel , Muhammad Imran Ahmad , Said Amirul Anwar
The multibiometric recognition system considered more reliable than the unimodal biometric recognition system due to the addition of an extra information that increases the discrimination between the classes. In this paper, a multi-sample multi-instance biometric recognition system is proposed. The aim of the proposed system is to increase the robustness of the identification. the proposed system also addresses the overfitting to the train samples problem of a feature extraction algorithm, named 2-Dimensional Linear Discriminant analysis (2D-LDA). The samples in the proposed method are bootstrapped and the 2D-LDA performed on each group during the offline phase. While in the online phase, the tested class will be transformed into subspaces using different eigenvectors that obtained from different samplings, and the results matched with templates in the corresponding subspace. To evaluate the proposed method, two palmprint databases are used which are IIT Delhi Touchless Palmprint Database and PolyU palmprint database, and different rank-level fusion algorithms are investigated. The results of the proposed method show improvement in the identification rate.
Volume: 13
Issue: 2
Page: 825-830
Publish at: 2019-02-01

Performance evaluation of flexible cross correlation (FCC) OCDMA code based on radio over fiber (RoF) simulation system

10.11591/ijeecs.v13.i2.pp543-550
Z. Ibrahim , C.B.M. Rashidi , S.A. Aljunaid , A.K. Rahman , M.S. Anuar
This paper investigates the performance of an elegance code set algorithm known as Flexible Cross Correlation (FCC) code to be run into a simulation test of proposed RoF system. Executing OCDMA Code into RoF framework is seen as a promising technique for enhancing spectral efficiency and meanwhile enhanced the length of fiber optic cable and data bit rate execution while reduce the passive equipment device. This code can efficaciously reduce the results of phase-induced intensity noise (PIIN), it has the multiple access interference (MAI) cancellation belongs to RoF system and at the same time simple and easy within the code construction. Bit error rate (BER) performance is assessed for this proposed simulation system. The evaluation made based on the performance of fiber length, data bit rate, related with Bit Error Rate (BER) and also the complexity of the system. The extensive simulation results reveal FCC code possibly will accomplish sufficiently up to 51 km at BER 10-9 for data rate 155 Mbps as matched to 622 Mbps with exponentially increases at BER 10-12 error floor and it is fit for short haul networking such as FTTH and local area network (LAN).
Volume: 13
Issue: 2
Page: 543-550
Publish at: 2019-02-01
1 2 3
...
1982 1983
Show 1337 of 1983

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration