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[EARLY DETECTION OF BREAST CANCER USING ULTRA WIDE BAND SLOT ANTENNA ]]>
<![CDATA[Yusnita Rahayu]]>;
<![CDATA[Immanuel Waruwu]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.004
<![CDATA[Breast cancer is the transformation of normal cells in the breast area into a malignant tumor, which is the second largest disease as a cause of death for women. Early detection is one way to avoid significant risks in breast cancer. X-ray mammography and magnetic resonance imaging (MRI) techniques are used to detect breast cancer. However, those techniques have several limitations. Ultra-wideband (UWB) microwave imaging, approved by The Federal Communications Commission (FCC) in the United States, has promising capabilities in detecting breast cancer. Microwave imaging uses a microstrip antenna that has the advantage of convenience, potentially low cost, and is a non-ionized and safe alternative. In this paper, the ultra-wideband microstrip antenna for breast cancer detection is proposed. The antenna was designed by adding some rectangular slots on a rectangular patch to meet the UWB specifications. The antenna works well at 8.41 GHz to 10.29 GHz with directivity of 6.451 dBi and SAR value of 1.6 W / kg. The antenna was simulated with breast phantom. The tumor sizes of 6 mm and 10 mm are added to evaluate the E/H fields and current density with and without tumor. The highest E-Field value of 928.8 V / m was obtained at 10 GHz with a 10 mm tumor size. The highest H-Field value of 4.06 V / m was achieved at 10 GHz with a 6 mm tumor size. From the simulation, the E/H-field and current density are higher if there is a tumor in the breast compared to the breast without the tumor.]]>
<![CDATA[IMPROVING PASSENGERS SATISFACTION OF “TRAVEL” CORRIDOR PADANG-PESISIR SELATAN USING IMPORTANCE - SATISFACTION ANALYSIS (ISA) ]]>
<![CDATA[Yosritzal Yosritzal]]>;
<![CDATA[Seprino Hendra]]>;
<![CDATA[Bayu Martanto Adji]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.009
<![CDATA[This study was motivated by the case of the disappearance of legal bus services due to their loss in competition with a kind of car services called “Travel” for the corridor of Padang - Pesisir Selatan, West Sumatera, Indonesia. Travel might not legal public transport services, and therefore, in this study is also called un-official public transportation. This study aims to determine the driving attributes for passenger’s satisfaction of un-official public transportation services and to figure out the service attributes that need to be improved according to passengers’ perceptions. Data was collected using random sampling with a total sample of 160 respondents and was analyzed using the Importance Satisfaction Analysis (ISA) method. Quadrant analysis of ISA revealed that the availability of music and air conditioner on-board is not so essential but resulting a higher satisfaction to passengers. Passengers are calling for an improvement of the services by consistently implementing the law against a driver who uses a mobile phone while driving or driving inconsiderately, and improving the courtesy and friendliness of the driver.]]>
<![CDATA[IMPROVEMENT BONDING QUALITY OF SHOE USING QUALITY CONTROL CIRCLE ]]>
<![CDATA[Meike Elsye Beatrix]]>;
<![CDATA[Novera Elisa Triana]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.005
<![CDATA[Shoe industry development in the era of globalization is currently overgrowing. Therefore, every company should be able to compete strictly with other companies that produce the same products. Quality maintenance is having to be done by the company to survive in business competition. PT. ABC is a manufacturer of sports shoes. The company has a problem with bonding shoes not achieved company standard in the year 2017. This paper is focused on the improvement of bonding shoe quality by using a method of Quality Control Circle which applying quality control tools are like check sheet, Pareto diagram, fishbone diagram, and 5W + 1 H. Based on the research results obtained percentage improvements of quality bonding test of 21.15%. Cement stripping on the midsole is the most significant number of the bonding test failure in Laboratory that is as much as 26.33% or 218 prs from the total collapse of the overall bonding shoes. Based on the background, the purpose of this research is to find out the root causes of the failure of bonding test shoes. The limitations of this research are only improving processes in the department, which makes the bonding shoe quality does not achieve the company standard. After doing the analysis using the quality control tools and making the improvement process in the whole areas that the percentage of the bonding test cement stripping on midsole could be increased to 5.18%. Analysis of the results obtained by applying the method of Quality Control Circle is the improvement of the quality of the bonding shoe. So, the trust customers against the company may be obtained that would eventually increase the number of orders to the company.]]>
<![CDATA[PERCEPTION OF NEIGHBORHOOD AROUND THE REAL ESTATE PHYSICAL BOUNDARY ]]>
<![CDATA[Tin Budi Utami]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.010
<![CDATA[The presence of real estate in South Tangerang cannot be separated from a surrounding settlement or new settlements that grew later. Regulation and design are more set-in real estate planning so that real estate tends to form an enclave for security and social image. Forming some type of physical boundary with surrounding residential of real estate perceived vary both by residents and outside the real estate. This study aims to map out how the perception of the surrounding community to the physical boundaries of real estate on a cluster pattern made by the developer, with research sites in Bintaro Jaya, South Tangerang. The method used observation and structured interviews with communities. The surrounding community has very positively responded to the presence of real estate, but the relationship with the institution is perceived as not useful because of the boundary design is more detrimental for them. Their participation in the plan has not been well accommodated so that access is closed unilaterally by the developer.The presence of real estate in South Tangerang cannot be separate from a surrounding settlement or new settlements that grew later. Regulation and design are more set-in real estate planning so that real estate tends to form an enclave for security and social image. Forming some physical boundary with surrounding residential of real estate perceived vary both by residents and outside the real estate. This study aims to map out how the perception of the surrounding community to the physical boundaries of real estate on a cluster pattern made by the developer, with research sites in Bintaro Jaya, South Tangerang. The method used observation and structured interviews with communities.The surrounding community has very positively responded to the presence of real estate, but the relationship with the institution is perceived as not useful because the boundary design is more detrimental for them. Their participation in the plan has not been well accommodated so that access is closed unilaterally by the developer.]]>
<![CDATA[BUILDING ENVELOPE COMPONENT TO CONTROL THERMAL INDOOR ENVIRONMENT IN SUSTAINABLE BUILDING: A REVIEW ]]>
<![CDATA[Abraham Seno Bachrun]]>;
<![CDATA[Ting Zhen Ming]]>;
<![CDATA[Anastasia Cinthya]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.001
<![CDATA[The engineering of building envelope aims is to achieve building energy efficiency which uses shading device to increase the shaded area. Also, to reduce heat gain by the building from solar radiation, this will reduce the energy load on the building. This paper aim to focuses on the deepening of technology of building envelope elements, and how the building envelope can control the thermal comfort as part of the indoor environment in a building that carries sustainability architecture. In conclusion, finally, reveal that the principles of passive design on building envelope have a great influence on the comfort level in the building. It is not possible to create a design that meets the thermal comfort requirements by emphasizing the design of building envelopes. The goal to be achieved in sustainable design is to minimize the use of the current design that takes much energy (almost14% world energy consumption) to address the issue of energy crisis lately.]]>
<![CDATA[IMPLEMENTATION OF FREQUENCY RESPONSE FUNCTION ON TAPPER BEARING MAINTENANCE ]]>
<![CDATA[Ari Susanto]]>;
<![CDATA[Setyo Qomarudin Yusuf]]>;
<![CDATA[Abdul Hamid]]>;
<![CDATA[Haris Wahyudi]]>;
<![CDATA[Subekti Subekti]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.006
<![CDATA[Bearing acts as a pad that supports a shaft to rotate without excessive friction, hold the radial load and maintain the motion towards the left and right shafts (Thrust Load) when turning together. Due to frequent taper bearing damage to the wheels, predictive maintenance is therefore necessary. One of the predictive maintenance methods widely used today is vibration analysis. The principles of vibration-based bearing damage detection using the Frequency Response Function (FRF) method will be shown in this paper. Harmonics signal is given to the bearing surface in a vertical or perpendicular direction to the taper bearing surface. The vibration response measurement was carried out on three axes (x, y, and z). The results of this study indicated the ability of FRFs to predict any damage on the bearing taper. ]]>
<![CDATA[ROTATED RECTANGULAR SLOTS AND MIRRORED INVERSED CANTOR-SETS ON ULTRAWIDEBAND ANTIPODAL VIVALDI ANTENNA ]]>
<![CDATA[Sabri Alimi]]>;
<![CDATA[Teguh Prakoso]]>;
<![CDATA[Munawar Agus Riyadi]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.011
<![CDATA[Variants of antipodal Vivaldi antenna (AVA) design suitable for access point working on 0.5 – 6.0 GHz are proposed in this paper. The novel designs were produced by employing three novel techniques to conventional AVA: (i) rotated-slot pattern to shift down the frequency cutoff and enhancing bandwidth, (ii) curve design to miniaturize rotated-slot-inserted antipodal Vivaldi, and (iii) fractal-director (Cantor set) to increase the gain of antipodal Vivaldi. Using FR4 (relative permittivity of 4.4) with an overall dimension of 300 mm x 143 mm x 1.6 mm the antenna designs are able to work at a frequency of 0.472 GHz to higher than 6 GHz with a maximum gain of 11.9 dBi.]]>
<![CDATA[ASSESS THE RISK LEVEL OF POWER TRANSFORMER DUE SHORT-CIRCUIT FAULTS BASED ON ANFIS ]]>
<![CDATA[Azriyenni Azhari Zakri]]>;
<![CDATA[Mohd Wazir Mustafa]]>;
<![CDATA[Hari Firdaus]]>;
<![CDATA[Ibim Sofimieari]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.002
<![CDATA[A power transformer is an electrical machine that converts electrical power at different voltage levels. Faults, occur in power transformers, inhibit electrical power distribution to the consumer. Protection, therefore, of the power transformers is essential in power systems reliability. The power system can be reliable if the protection devices work well when there is a fault. A hybrid intelligent technique, which is a combination of Artificial Neural Network (ANN) and Fuzzy known as Adaptive Neuro-Fuzzy Inference Systems (ANFIS), was used in this research. The objective of this paper is the simulation of differential relays as a protection device on power transformers using Matlab/Simulink. Performance of differential relays for power transformers protection is carried out with internal and external fault scenarios. The input data were classified into three different input for ANFIS such as internal and external 1, internal and external 2, internal, external 1, and external 2, respectively. The error results of ANFIS training for the type of fault internal and external 1 is 9.46*10-7, and types of fault internal and external 2 is 1.09*10-6 internal, external 1 and external 2 are 8.59*10-7. The results obtained from the simulation were accurate and shows that the ANFIS technique is an efficient method that gives less error and a great value. Finally, the technique can minimize faults with power transformers. Finally, to prove this method can reduce faults in the power transformer, the assess of this model has been carried out through the RMSE that has been generated which is zero.]]>
<![CDATA[VARIATION OF CUTTING PARAMETERS IN THE PROCESS OF TURNING AISI 4340 STEEL ON SURFACE ROUGHNESS ]]>
<![CDATA[M. Sobron Yamin Lubis]]>;
<![CDATA[Erwin Siahaan]]>;
<![CDATA[Steven Darmawan]]>;
<![CDATA[Adianto Adianto]]>;
<![CDATA[Ronald Ronald]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.007
<![CDATA[In the metal machining process, cutting speed and feed rate are cutting parameters that affect the surface quality of the workpiece produced. The use of improper cutting parameters can cause the workpiece surface to be rough, and the cutting toolage to be shorter. This study was conducted to determine the effect of cutting parameters and the use of carbide tools on the surface roughness of metal steel workpieces. The research was carried out using the experimental method of AISI 4340 steel metal workpiece turning using cutting tool coated. Five variations of cutting speed used are: 140 m/min, 150 m/min, 160 m/min, 170 m/min, 180 m/min and three variations in feed rate: 0.25 mm/rev, 0.3 mm/rev, 0.35 mm/rev. After the turning process, the surface roughness of the workpiece is measured using a surface tester. From the results of the study, it was found that the surface roughness value was directly proportional to the feed rate and inversely proportional to the cutting speed. The smallest surface roughness value is 9.56 μm on cutting speed 180 m / min, and feed rate is 0.25 mm/rev. ]]>
<![CDATA[DESIGN WORK STATION OF PIPE WELDING WITH ERGONOMIC APPROACH ]]>
<![CDATA[Silvi Ariyanti]]>;
<![CDATA[Lamto Widodo]]>;
<![CDATA[Muhammad Zulkarnain]]>;
<![CDATA[Kevin Timotius]]>
<![CDATA[ SINERGI Vol 23, No 2 (2019) ]]>
Publisher : <![CDATA[Universitas Mercu Buana ]]>
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DOI: 10.22441/sinergi.2019.2.003
<![CDATA[The activity of welding specimens on a big pipe that causes various problems for the body, in this activity the worker is at a risky position such as lifting a pipe weight 90 kg, lifting the specimen and welding the pipe with the specimen and the final process is to lower the pipe that has been connected. The purpose of this study is to design workstation by the principles of ergonomics to help reduce physical worker complaints. The research method in this study was the Nordic Body Map (NBM) questionnaire to determine complaints of musculoskeletal disorders (MSDs); the work posture was analyzed by the Rapid Entire Body Assessment (REBA) method. From the results of this study, it can be concluded that the welding work requires a tool in the form of a bench, pipe support, a pulley used at a new welding workstation. With a new workstation, poor work posture can be repaired. With a new work station, there is an efficiency of 8.33 minutes of work time from previous working conditions.]]>
