Sinergi
SINERGI is a peer-reviewed international journal published three times a year in February, June, and October. The journal is published by Faculty of Engineering, Universitas Mercu Buana. Each publication contains articles comprising high quality theoretical and empirical original research papers, review papers, and literature reviews that are closely related to the fields of Engineering (Mechanical, Electrical, Industrial, Civil, and Architecture). The theme of the paper is focused on new industrial applications and energy development that synergize with global, green and sustainable technologies. The journal registered in the CrossRef system with Digital Object Identifier (DOI). The journal has been indexed by Google Scholar, DOAJ, BASE, and EBSCO.
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<![CDATA[REAL-TIME CLASSIFICATION OF FACIAL EXPRESSIONS USING A PRINCIPAL COMPONENT ANALYSIS AND CONVOLUTIONAL NEURAL NETWORK ]]>
<![CDATA[Dwi Lydia Zuharah Astuti]]>;
<![CDATA[Samsuryadi Samsuryadi]]>;
<![CDATA[Dian Palupi Rini]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.008
<![CDATA[Classification of facial expressions has become an essential part of computer systems and human-computer fast interaction. It is employed in various applications such as digital entertainment, customer service, driver monitoring, and emotional robots. Moreover, it has been studied through several aspects related to the face itself when facial expressions change based on the point of view or perspective. Facial curves such as eyebrows, nose, lips, and mouth will automatically change. Most of the proposed methods have limited frontal Face Expressions Recognition (FER), and their performance decrease when handling non-frontal and multi-view FER cases. This study combined both methods in the classification of facial expressions, namely the Principal Component Analysis (PCA) and Convolutional Neural Network (CNN) methods. The results of this study proved to be more accurate than that of previous studies. The combination of PCA and CNN methods in the Static Facial Expressions in The Wild (SFEW) 2.0 dataset obtained an accuracy amounting to 70.4%; the CNN method alone only obtained an accuracy amounting to 60.9%.]]>
<![CDATA[IMPROVEMENT OF NETWORK SURVIVABILITY USING THE EFFECTIVE REDUNDANCY DESIGN ]]>
<![CDATA[Akhmad Wahyu Dani]]>;
<![CDATA[Fadli Sirait]]>;
<![CDATA[Fina Supegina]]>;
<![CDATA[Rohilah Sahak]]>;
<![CDATA[Kresna Jery Kusnanto]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.010
<![CDATA[Network survivability is a very important issue due to the sustainability of the network services. Failure in a network system conduce to disturbance of the network services and causes trouble to millions of applications. Implement an effective redundancy design is one of method to cope nuisance in terms of sustainability in a network. In this paper, there are two design networks with and without redundancy respectively by Metro Ethernet-based technique to support transmission of data and voice. Furthermore, there is a validation performance of networks by measuring and comparing the throughput, latency and jitter between the two network designs. The value of bandwidth capacity is 100 Mbps as plan bandwidth link. Measurements results denote that network with redundancy design is able to enhance performance of the network, the parameters are: the throughput on single link tends to moderate (25%-50%), on the other hand, the throughput values on the main link and back uplink are in accordance with very good condition (75%-100%). The values of frame loss ratio 69.979% - 56.679% (single link), 6.77% -9.999% (main link) and 6.676 %-9.999% (back uplink). The values of jitter and latency in network with redundancy design are much better than in single link network. The recovery time for each frame length is ranging from 48.999ms to 49.887ms, where it is still meet with the standard that must below 50ms. Finally, when the main link in the network topology with redundancy design undergo link fails condition, the backup link is able to maintain the quality of network throughout that time, on the contrary, network topology without redundancy design is unable.]]>
<![CDATA[HANDLING OF COAL DUST AT COAL HANDLING FACILITY IN COAL POWER PLANT USING SOFT SYSTEM METHODOLOGY (SSM) APPROACH ]]>
<![CDATA[Akhyar Zuniawan]]>;
<![CDATA[Iphov Kumala Sriwana]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.006
<![CDATA[Currently, many coal-fired powers plants are built to supply electrical energy needs in Indonesia due to relatively inexpensive raw materials and abundant in Indonesia. Handling of coal is mostly done at the power plant using coal handling facilities consisting of ship unloaders, conveyor belts, stock piles, silos or bunkers. The problem that arises in the coal handling facility is dust from coal that fells or hovers in the air so that it can interfere with the environment and health both for workers in the Coal Power and residents around the Coal Power. The purpose of writing this paper is to eliminate the spread of coal dust that arises due to coal handling equipment that is not precise and imperfect. The method used is the Soft System Methodology (SSM), which is a systematic approach used to analyze and solve problems in complex and messy situations. This paper examines the benefits of applying SSM to knowledge management issues in handling coal dust at a power plant. Improvement is done by upgrading coal handling equipment (ship unloader, conveyor belt, stock pile) with the addition of dust suppression, proper sealing system, dust bag, and training to operators on the impact and handling of coal dust and coal handling equipment maintenance, so resulting in a significant decrease in the spread of coal dust, creating a working environment and the environment becomes clean, healthy and safe.]]>
<![CDATA[REDUCING THE PRODUCT CHANGEOVER TIME USING SMED & 5S METHODS IN THE INJECTION MOLDING INDUSTRY ]]>
<![CDATA[Daniel Agung]]>;
<![CDATA[Hasbullah Hasbullah]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.004
<![CDATA[Along with the increasing market of plastic packaging products resulting from the injection process and the rapid development of existing technology, we need a strategy to be able to continue to meet the customer’s needs and to be able to compete in the industry. One of the strategies that may be employed is Lean. Lean is a concept aimed at eliminating existing waste. One of the implementations of Lean’s concept is the SMED (Single Minute Exchange of Dies) concept. SMED is a concept aimed at reducing the changeover time, so the eliminated time can be used in the production process. P.T. BIL is one of the companies engaged in the production of plastic packaging with an injection process. Problems occurring at P.T. BIL was the absence of a measurement process for changeover time. The Operation Analysis Chart concept was used to analyze the carried-out activities. To optimize activities employing the SMED concept, Analytical Cards were used so that the change over time can be reduced. The 5S concept was applied to support the SMED concept, so the waste in the work area could be eliminated. By implementing the SMED concept, we reduced 18% of the change over time.]]>
<![CDATA[THE EFFECT OF COMPETITIVE STRATEGIES ON THE PERFORMANCE OF CONSTRUCTION ORGANIZATIONS IN INDONESIA ]]>
<![CDATA[Muji Indarwanto]]>;
<![CDATA[Sarjono Puro]]>;
<![CDATA[Edison H. Manurung]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.005
<![CDATA[This study was aimed at examining the effect of competitive strategies and performance of construction organizations in the large construction industry in Indonesia. This study adopted a quantitative research approach using a questionnaire survey to obtain data from 260 senior managers and CEOs of enormous construction organizations in Indonesia. Using Partial Least Square (PLS), we examined the relations between the constructs discussed in the study. We found out that competitive strategies affected the performance of construction organizations; competitive strategies positively impacted on the organizational performance. These findings showed that we needed to harmonize a competitive strategy as a prerequisite to achieving superior performance. We believed that this study positively contributed to the role of competitive strategy and the performance of large construction organizations in Indonesia and ongoing discussions on issues arising in construction management in development.]]>
<![CDATA[THE IDENTIFICATION OF DETERMINANT PARAMETER IN FOREST FIRE BASED ON FEATURE SELECTION ALGORITHMS ]]>
<![CDATA[Devi Fitrianah]]>;
<![CDATA[Hisyam Fahmi]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.002
<![CDATA[This research conducts studies of the use of the Sequential Forward Floating Selection (SFFS) Algorithm and Sequential Backward Floating Selection (SBFS) Algorithm as the feature selection algorithms in the Forest Fire case study. With the supporting data that become the features of the forest fire case, we obtained information regarding the kinds of features that are very significant and influential in the event of a forest fire. Data used are weather data and land coverage of each area where the forest fire occurs. Based on the existing data, ten features were included in selecting the features using both feature selection methods. The result of the Sequential Forward Floating Selection method shows that earth surface temperature is the most significant and influential feature in regards to forest fire, while, based on the result of the Sequential Backward Feature Selection method, cloud coverage, is the most significant. Referring to the results from a total of 100 tests, the average accuracy of the Sequential Forward Floating Selection method is 96.23%. It surpassed the 82.41% average accuracy percentage of the Sequential Backward Floating Selection method.]]>
<![CDATA[INSPECTING A BUMP TEST IN THE MAINTENANCE OF A 1200-CC DAIHATSU SIGRA DISC BRAKE ]]>
<![CDATA[Subekti Subekti]]>;
<![CDATA[Abdul Hamid]]>;
<![CDATA[Basuki Dwi Effendy]]>;
<![CDATA[Agung Wahyudi Biantoro]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.003
<![CDATA[A motorized vehicle needs a system that can not only reduce the speed and stop the vehicle but can also serve as a safety tool and ensure a safe distribution which is called a braking system. It is important to conduct maintenance of a disc brake that is part of the braking system. Therefore, this study developed a technique to inspect a 1200-cc Daihatsu Sigra disc brake through the vibration measurement using a bump test. A disc brake is comprised of three fields: A (located next to the center of the disc brake), B ( in the middle diameter), and C ( in the outer diameter of the disc brake). Each field has ten measurement points. This study showed that disc brake damages occurring in field A were at points 1-3, and they appeared after the 250-Hz frequency. Meanwhile, in fields B and C, at all measurement points, there were no changes taking place at any frequency.]]>
<![CDATA[BAT ALGORITHM IMPLEMENTATION TO OPTIMALLY DESIGN THE STABILIZER POWER SYSTEM ON THE SUPPA GENERATOR ]]>
<![CDATA[Muhammad Ruswandi Djalal]]>;
<![CDATA[Herman HR]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.007
<![CDATA[One of the control devices that can be used to strengthen the performance of PLTU Suppa is the installation of Power System Stabilizer. The problem of using Power System Stabilizer (PSS) in generator excitation is how to determine the optimal PSS parameter. To overcome these problems, the authors use a method of intelligent bats to design PSS. Bat's algorithm will work based on the specified destination function, which is an Integral Time Absolute Error (ITAE). In this research, we will see the deviation response of velocity and the rotor angle of the suppa generator in case of interference. The results of the analysis show that the uncontrolled system produces oscillation overshoot speed of -0.02437 pu to 0.006517 pu, conventional PSS about -0.02186 pu to 0.004623 pu and with PSS Bat overshoot of -0.01507 pu up to 0.0006223 pu. A loop for rotor angle response shows good results with reduced oscillation and rapidly leading to steady-state conditions. From the analysis results can be concluded, the performance of suppa generator is increased with the installation of Power System Stabilizer with optimal PSS parameters, with parameters respectively Kpss = 32.2077, T1 = 0.0173, T2 = 0.0401, T3 = 0.9174, T4 = 1.2575.]]>
<![CDATA[DETECTING CLASSIFIER-COAL MILL DAMAGE USING A SIGNAL VIBRATION ANALYSIS ]]>
<![CDATA[Dedik Romahadi]]>;
<![CDATA[Alief Avicenna Luthfie]]>;
<![CDATA[L. B. Desti Dorion]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.001
<![CDATA[A classifier plays a crucial role in the cement industry. It is in charge of separating coal that has been smoothened out and is ready to be burned although the coal is still rough after going through the grinding process. It takes a long time to burn coal that is not perfectly processed with a classifier. Therefore, it will reduce the amount of cement production, and the factories will release more energy. The closed arrangement and the number of components in the unit classifier requires a sophisticated method to detect damage that occurs early. Vibration analysis is a method that has been effectively employed in detecting the initial damage that occurs to the engine, especially the classifier. This study was aimed at detecting the location of the damage occurring in the classifier by using a vibration signal analysis and by measuring the magnitude of vibration and presenting it to the frequency domain (spectrum) form using Fast Fourier Transform. Engine condition assessment referred to ISO 10816-3 standard in velocity and displacement modes. Based on data spectrum analysis, the dominant damage laid in the unbalanced rotor. Spectrum characteristics of the damage appeared to be in the spectrum line worth 438.01 μm at a 3.5-Hz frequency (1X) radially. This analysis proved to be supported by the decrease in vibration value to 18.65 μm after balancing the Classifier rotor.]]>
<![CDATA[INTERIORITY OF PUBLIC SPACE IN THE DEAF EXHIBITION CENTER IN BEKASI ]]>
<![CDATA[Rachmita Maun Harahap]]>;
<![CDATA[Imam Santosa]]>;
<![CDATA[Deddy Wahjudi]]>;
<![CDATA[Widjaja Martokusumo]]>
<![CDATA[ SINERGI Vol 23, No 3 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.3.009
<![CDATA[The study aims to show the implementation of Deaf Space design guidelines application in the Deaf Exhibition Center building. Even to increase society's understanding of the need for public space access facilities for hearing disabilities. The relation between persons with hearing disabilities and space is the most fundamental thing in creating a space experience (interiority). Interiority is processed prioritizing high visual orientation, and encourages the totality of other sensory experiences based on the philosophy of Deaf Space. In terms of interior design, persons with hearing disabilities have other space needs and are more specific.. Space experience, using the principle of Deaf Space design, namely 1) space and proximity, 2) sensory reach, 3) mobility and proximity, 4) light and color, dan 5) acoustic as a concept of implementation, is one way to create a particular space experience. As a conception of application, is one way to create a particular space experience. Deaf space design guidelines are considered an important aspect in determining design concepts and are influenced by hearing disabilities' behavioral characteristics of interiority (relations between space and humans). Context of hearing disability behavior which includes a series of stages of exploration process and interpretation by subject in it gives birth to an interiority. Interiority is the presence of oneself being able to comfort in this space. Interiority isnot merely a spatial concept, but concept in which disunited spaces can be one uniting body, mind, and space. The interiority in exhibition space toward hearing disability behavior can be implemented in design concept for hearing disability, so hearing disability users or visitors can engage in community interaction conversations and need space called "deaf space". The results of this study contribute to application of the Deaf Space design concept in DEC building toward behavior of hearing disability user, so that they can activity independently and productively.]]>
