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29,734 Article Results

Performance effect of applying paraffin wax on solar photovoltaic backplate

10.11591/ijeecs.v14.i1.pp375-380
E. Roslan , A. Razak
The efficiency of solar photovoltaic (PV) panels is affected by its operating temperature. Having high irradiance produces high electrical output but also heats up the panel and reducing the panels efficiency. This study investigates the effect of cooling solar PV panels using 750g of paraffin wax as phase change material (PCM) applied to the back plate of a solar PV panel. The experiment is done at Kajang, Selangor, Malaysia. The result is reduction of up to 9.5°C, increase of up to 0.947W or 11.82% of electrical power output when compared to the panel without any PCM applied. The panel cooled with PCM also produced 4.69% more energy
Volume: 14
Issue: 1
Page: 375-380
Publish at: 2019-04-01

Auto purchase order system between retailer and distributor

10.12928/telkomnika.v17i2.9948
Teguh; Nusantara PGRI Kediri University Andriyanto , Ary Permatadeny; Nusantara PGRI Kediri University Nevita
Uncertainty of goods inventory often triggers the occurrence of Bullwhip Effect, where there is accumulation of goods on a stage or lack of goods at another stage in the supply chain. Bullwhip Effect is caused by an error in ordering the amount of goods, error in the time of ordering or delivery of goods. The problem can be solved using information sharing. This research utilizing information sharing between two retailers and one distributors used for the ordering process of goods. The process of ordering goods retailers to distributors is done automatically based on sales data retailers. The order quantity is calculated based on the final stock and the maximum stock value of the goods.
Volume: 17
Issue: 2
Page: 660-666
Publish at: 2019-04-01

Low-cost communication system for explorer-class underwater remotely operated vehicle

10.12928/telkomnika.v17i2.11791
Simon; Telkom University Siregar , Muhammad Ikhsan; Telkom University Sani , Muhammad Muchlis; Telkom University Kurnia , Dzikri; Telkom University Hasbialloh
Disaster recovery from underwater earthquake, plane crashes into the sea, and monitoring underwater cables or piping for energy purpose are underwater missions for Remotely Operated Underwater Vehicle (ROV) in ASEAN MATE 2018 Competition. Two essentials factor to perform successfully in this ROV competition are design of an efficient communication protocol system and a low-cost communication hardware. In this research, an optimal communication system between RS-232 serial communication transmission and RS-485 serial communication transmission is developed to obtain the optimal solution. Both communication system is tested in Tech_SAS ROV-Telkom University Indonesia, a microcontroller underwater ROV based which used single microcontroller to control actuator, sensor and communication, and measured the Quality of Services (QoS) for end-to-end delay and packets loss. From the the experiment and evaluation for the two schemes, shows 12.57 ms end-to-end delay, 0% data packet error and $6 RS-485 communication system are the optimal solution for Tech_SAS ROV.
Volume: 17
Issue: 2
Page: 593-600
Publish at: 2019-04-01

Compared to wireless deployment in areas with different environmentse

10.11591/ijece.v9i2.pp934-940
Inaam Abbas Hieder
In the mobile phone system, it is highly desirable to estimate the loss of the track not only to improve performance but also to achieve an accurate estimate of financial feasibility; the inaccurate estimate of track loss either leads to performance degradation or increased cost. Various models have been introduced to accurately estimate the path loss. One of these models is the Okomura / Hata model, which is recommended for estimating path loss in cellular systems that use micro cells. This system is suitable for use in a variety of environments. This study examines the comparison of path loss models for statistical analysis derived from experimental data collected in urban and suburban areas at frequencies of 150-1500 MHz’s The results of the measurements were used to develop path loss models in urban and suburban areas. The results showed that Pathloss increases in urban areas respectively.
Volume: 9
Issue: 2
Page: 934-940
Publish at: 2019-04-01

Classification of blast cell type on acute myeloid leukemia (AML) based on image morphology of white blood cells

10.12928/telkomnika.v17i2.8666
Wiharto; Universitas Sebelas Maret Wiharto , Esti; Universitas Sebelas Maret Suryani , Yuda Rizki; Universitas Sebelas Maret Putra
AML is one type of cancer of the blood and spinal cord. AML has a number of subtypes including M0 and M1. Both subtypes are distinguished by the dominant blast cell type in the WBC, the myeloblast cells, promyelocyte, and myelocyte. This makes the diagnosis process of leukemia subtype requires identification of blast cells in WBC. Automatic blast cell identification is widely developed but is constrained by the lack of data availability, and uneven distribution for each type of blast cell, resulting in problems of data imbalance. This makes the system developed has poor performance. This study aims to classify blast cell types in WBC identified AML-M0 and AML-M1. The method used is divided into two stages, first pre-processing, image segmentation and feature extraction. The second stage, perform resample, which is continued over sampling with SMOTE. The process is done until the amount of data obtained is relatively the same for each blast cell, then the process of elimination of data duplication, randomize, classification and performance measurement. The validation method used is k-fold cross-validation with k=10. Performance parameters used are sensitivity, specifyicity, accuracy, and AUC. The average performance resulting from classification of cell types in AML with Random Forest algorithm obtained 82.9% sensitivity, 92.1% specificity, 89.6% accuracy and 87.5% AUC. These results indicate a significant improvement compared to the system model without using SMOTE. The performance generated by reference to the AUC value, the proposed system model belongs to either category, so it can be used for further stages of leukemia subtype AML-M0 and AML-M1.
Volume: 17
Issue: 2
Page: 645-652
Publish at: 2019-04-01

Design and implementation of a smart monitoring system for water quality of fish farms

10.11591/ijeecs.v14.i1.pp44-50
Nahla Abdul Jalil Salih , Ihsan Jabbar Hasan , Nadhir Ibrahim Abdulkhaleq
Fish farms are one of the most important sources of profitability for farmers. Therefore, these farms must be cared for and monitored continuously. the paper discuss  a smart system monitoring in a new way that we designed to monitor the quality and temperature of the fish pond’s water. This system has been designed and implemented to measure and monitor the pH and the temperature value of the fish pond’s water in real time. The system is divided into a measuring and monitoring part. The measuring part uses Arduino UNO as a microcontroller to measure the pH and temperature from the sensors. The data is then sent to the second part by Bluetooth. The second part (the monitoring part), is a new  application for smartphone  designed by ‘MIT App Inventor 2’, which monitors the status of the full system. The ‘MIT App Inventor 2’ is a google software (opensource) that enables you to easily build an Android application. The main advantage of this system is its ability to monitor the fish farms from long distances, with low cost and high reliability.
Volume: 14
Issue: 1
Page: 44-50
Publish at: 2019-04-01

Security vulnerabilities related to web-based data

10.12928/telkomnika.v17i2.10484
Mohammed; American University of Ras Al Khaimah Awad , Muhammed; American University of Ras Al Khaimah Ali , Maen; American University of Ras Al Khaimah Takruri , Shereen; American University of Ras Al Khaimah Ismail
In this digital era, organizations and industries are moving towards replacing websites with web applications for many obvious reasons. With this transition towards web-based applications, organizations and industries find themselves surrounded by several threats and vulnerabilities. One of the largest concerns is keeping their infrastructure safe from attacks and misuse. Web security entails applying a set of procedures and practices, by applying several security principles at various layers to protect web servers, web users, and their surrounding environment. In this paper, we will discuss several attacks that may affect web-based applications namely: SQL injection attacks, cookie poisoning, cross-site scripting, and buffer overflow. Additionally, we will discuss detection and prevention methods from such attacks.
Volume: 17
Issue: 2
Page: 852-856
Publish at: 2019-04-01

Voice recognition system for controlling electrical appliances in smart hospital room

10.12928/telkomnika.v17i2.11781
Eva Inaiyah; Universitas Airlangga Agustin , Riky Tri; Universitas Airlangga Yunardi , Aji Akbar; Universitas Airlangga Firdaus
Nowadays, most hospitals have new problem that is lack of medical nurse due to the number of patient increas rapidly. The patient especially with physical disabilities are difficult to control the switch on electrical appliances in patient’s room. This research aims to develope voice recognition based home automation and being applied to patient room. A miniature of patient’s room are made to simulate this system. The patient's voice is received by the microphone and placed close to the patient to reduce the noise.V3 Voice recognition module is used to voice recognition process. Electrical bed of patient is represented by mini bed with utilising motor servo. The lighting of patient room is represented by small lamp with relay. And the help button to call the medical nurse is represented by buzzer. Arduino Uno is used to handle the controlling process. Six basic words with one syllable are used to command for this system. This system can be used after the patient's voice is recorded. This system can recognize voice commands with an accuracy 75%. The accuracy can be improved up to 85% by changing the voice command into two syllables with variations of vowels and identical intonation. Higher accuracy up to 95% can be reached by record all the subject’s voice.
Volume: 17
Issue: 2
Page: 965-972
Publish at: 2019-04-01

K-band waveguide T-junction diplexer for satellite communication

10.12928/telkomnika.v17i2.9205
H.; Faculty of Sciences Tetouan Setti , A.; INPT Rabat Morocco Tribak , A. El; Faculty of Sciences Tetouan Hamichi , J.; Hassan 1st University Settat Morocco Zbitou , A.; University of Cantabria Santander Mediavilla
Design and measurement of two waveguide diplexers on H-plane T-junction, are presented. The two diplexers structures consist of a waveguide H-plane T-junction and two waveguide obtained cavity filters. The two diplexers operate in the same frequency bands (17 GHz-19.5 GHz). The simulation results show that over the operating band of two filters, the return losses are better than 18 dB and insertion losses are lower than 0.05 dB. The proposed diplexers have been simulated using Mician μ Wave Wizard simulator based on the mode matching method (MMM). The diplexers have been validated experimentally and results are presented. Simulated and measured results show good agreement.
Volume: 17
Issue: 2
Page: 549-554
Publish at: 2019-04-01

K-means and bayesian networks to determine building damage levels

10.12928/telkomnika.v17i2.11756
Devni Prima; Gadjah Mada University Negeri Padang University Sari , Dedi; Gadjah Mada University Rosadi , Adhitya Ronnie; Gadjah Mada University Effendie , Danardono; Gadjah Mada University Danardono
Many troubles in life require decision-making with convoluted processes because they are caused by uncertainty about the process of relationships that appear in the system. This problem leads to the creation of a model called the Bayesian Network. Bayesian Network is a Bayesian supported development supported by computing advancements. The Bayesian network has also been developed in various fields. At this time, information can implement Bayesian Networks in determining the extent of damage to buildings using individual building data. In practice, there is mixed data which is a combination of continuous and discrete variables. Therefore, to simplify the study it is assumed that all variables are discrete in order to solve practical problems in the implementation of theory. Discretization method used is the K-Means clustering because the percentage of validity obtained by this method is greater than the binning method.
Volume: 17
Issue: 2
Page: 719-727
Publish at: 2019-04-01

Remote sensing technology for disaster mitigation and regional infrastructure planning in urban area: a review

10.12928/telkomnika.v17i2.12242
Muhammad; University of Indonesia Dimyati , Akhmad; Islamic University of Indonesia Fauzy , Anggara Setyabawana; Islamic University of Indonesia Putra
A Very high intensity of regional development is ubiquitous in urban areas. Therefore, urban development requires a proper spatial development strategy in many facets, especially social aspect and disaster potential. The essence of social aspect lies in the prevailing norms and local wisdom that have long existed and become the basis of community life. Inducing various effects on infrastructure development, disaster potential has to be considered as well. Disaster mitigation measures can start with the use of continually developing remote sensing technology, which provides a basis for preparing sustainable development planning. The realization of these measures in urban areas demands specific adjustment to the environmental conditions. This study aimed to examine the capacity of remote sensing data to support disaster mitigation and infrastructure planning based on energy conservation in urban areas. The results indicate that remote sensing technology can be an option for sustainable development planning in urban areas.
Volume: 17
Issue: 2
Page: 601-608
Publish at: 2019-04-01

Recent trends in big data using hadoop

10.11591/ijict.v8i1.pp39-49
Chetna Kaushal , Deepika Koundal
Big data refers to huge set of data which is very common these days due to the increase of internet utilities. Data generated from social media is a very common example for the same. This paper depicts the summary on big data and ways in which it has been utilized in all aspects. Data mining is radically a mode of deriving the indispensable knowledge from extensively vast fractions of data which is quite challenging to be interpreted by conventional methods. The paper mainly focuses on the issues related to the clustering techniques in big data. For the classification purpose of the big data, the existing classification algorithms are concisely acknowledged and after that, k-nearest neighbor algorithm is discreetly chosen among them and described along with an example. 
Volume: 8
Issue: 1
Page: 39-49
Publish at: 2019-04-01

Government role in influencing creative economy for community purchasing power

10.12928/telkomnika.v17i2.9711
Dedeh; Institut Pemerintahan Dalam Negeri (IPDN) Maryani , Rossy; Institut Pemerintahan Dalam Negeri (IPDN) Lambelanova
This research was conducted to find out whether the West Java provincial government has implemented the development of creative economy by looking at the form of policy and budget support in APBD and the problem. The results show, West Java Provincial Government has made regional regulations and creative economic blueprints. It is suggested to be more committed to facilitate the marketing of results, facilitate business actor access to banking, protection of intellectual property rights, and enhancement of cooperation between provinces and districts/municipalities for the sustainability of necessary raw materials.
Volume: 17
Issue: 2
Page: 835-843
Publish at: 2019-04-01

Dynamic performance comparison of DFIG and FCWECS during grid faults

10.12928/telkomnika.v17i2.11747
A. M. Shiddiq; Politeknik Negeri Ujung Pandang Yunus , Makmur; Politeknik Negeri Ujung Pandang Saini , Ahmed; Curtin University Abu-Siada
Among several types, variable speed-based wind turbine generator (WTG) is the most popular type installed worldwide. This type of WTG is able to extract 5% more energy from wind speed compared to the fixed speed WTG. There are two kinds of variable speed based WTG; Doubly Fed Induction Generator (DFIG) and Full Converter Wind Energy Conversion System (FCWECS). DFIG and FCWECS are placed at the first and second topWTG installation worldwide since 2004. However, both of them are very sensitive to the grid dip fault and may violate the allowable margins identified by various international Fault Ride Through (FRT) codes. This paper aims to investigate the responses of DFIG and FCWECS during certain level of grid dips and compare their performanceunder such event. Results show some differences of the performance of DFIG and FCWECS during voltage sag event, however the voltage profile at the point of common coupling is much better in case of DFIG. Results also recommend that DFIG can be effective when connected to weak grids whilst FCWECS is preferably to be connected to strong grids.
Volume: 17
Issue: 2
Page: 1040-1046
Publish at: 2019-04-01

An artificial intelligent approach for the optimization of organic rankine cycle power generation systems

10.11591/ijeecs.v14.i1.pp340-345
JianDing Tan , ChinWai Lim , SiawPaw Koh , SiehKiong Tiong , YingYing Koay
The study on Organic Rankine Cycle (ORC) power generation system has gained significant popularity among researchers over the past decade, mainly due to the financial and environmental benefits that the system provides. A good maximum power point tracking (MPPT) mechanism can push the efficiency of an ORC to a higher rate. In this research, a Self-Adjusted Peak Search algorithm (SAPS) is proposed as the MPPT scheme of an ORC system. The SAPS has the ability to perform a relatively detailed search when the convergence reaches the near-optima peak without jeopardizing the speed of the overall convergence process. The SAPS is tested in a simulation to track for a moving maximum power pint (MPP) of an ORC system. Experiment results show that the SAPS outperformed several other well-established optimization algorithm in tracking the moving MPP, especially in term of the solution accuracies. It can thus be concluded that the proposed SAPS performs well as a mean of an MPPT scheme in an ORC system
Volume: 14
Issue: 1
Page: 340-345
Publish at: 2019-04-01
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