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INSIST (International Series on Interdisciplinary Research)

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Published by Universitas Lampung

ISSN : - EISSN : 25028588 DOI : -

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INSIST is an International online journal which publishes innovative research papers and critical reviews in the field of engineering and interdisciplinary science researches. It focuses on but not limited to Electrical and Telecommunication, Mechanical Engineering, Chemical and Environmental Engineering, Civil and Architecture, Geophysics Engineering, Material Physics, Applied Sciences and Biomedical Engineering. The over-riding criteria for publication are the originality, scientific quality and interest to the interdisciplinary research.

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Articles 8 Documents

Search results for , issue "Vol 2, No 2 (2017)" : 8 Documents clear

Risk Assessment Approach in Airport Security Mahardi Sadono; Saphira Alifa Harahap; Dani Yulianto Putra; Randhy Randhy; Muhamad Luthfi Imam Nurhakim
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

Naturally, the threat to flight is generated from all activities at the airport by passenger or freight. With the growth of air transport, the level of threat to flight activity will also increase. Due to ensure the security of passengers, staff, and all elements of the airport, the airport as a place of the flight operations need a reliable protection system. The purpose of this study is to develop a methodology for assessing the risk level at the airport in order to improve the level of protection at the airport. The level of threats that could jeopardize airport security is categorized into several levels, then analyzed to what extent the risk level can be tolerated as a reference to the formulation of standard protection systems at the airport. The results of this study can be used to deal with threats that occur in the airport through preventive action by setting up a reliable protection system. The risk assessment approach also able to evaluate the airport's existing protection system whether it is tolerable to deal with threats or not, so action can be taken to improve the protection system if the failure rate is still high and have massive consequences to the all airport elements.Keywords— airport security, failure rate, protection system, risk assessment, tolerable risk level.

The Effect Catalyst Natural Zeolite of Lampung On The Synthesis Of α-Terpineol From Turpentine Herti Utami; Simparmin Br. Ginting; Dwi Derti Sulistiowati; Ria Putri Hermiyati
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

The major component of turpentine is α-pinene. Alpha pinene can be hydrated using an acid catalyst to produce α-terpineol. It can be used as a perfume, anti -insect, and disinfectants. The using of heterogeneous catalysts as natural zeolite can be a new alternative to replacehomogeneous catalysts. The purpose of this study was to determine the effect of zeolite catalysts and the reaction time which resulting the highest conversion on hydration reactions of turpentine to α-terpineol. Parameters were the effect of catalyst concentration of (5%, 10% and 15%) and the reaction time (60 minutes, 120 minutes and 180 minutes). The turpentine, aquadest and isopropyl alcohol were reacted in the three neck flask at the temperature of 70°C. The result of this study showed that the best condition the hydration of turpentine α-terpineol was achieced at 15% catalyst concentration and the reaction time of 180 minutes. The convertion was obtained to be 4.875%.Keywords— Turpentine, Hydration, Alpha terpineol, Catalys,Natural Zeolite.

Analysis of Surface Roughness Value When Drilling Magnesiumaz31 Using Taghuci Method Gusri Akhyar Ibrahim; Arinal Hamni; Sri Maria Puji Lestari
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

Magnesium alloy is one of super alloys material which wide used in manufacturing of automotive, biomedic, sport and electronic components. It was due to very light and resistent to corrosion. Surface roughness value has an important role to estabilish the quality of components. To produce a good surface roughness of machined surface, one of the important thing depends on the friction between the cutting tool and workpiece material when cutting process occurred. The aim of this paper is to analyse the surface roughness values of machined surface when drilling of magnesium alloy AZ31 using design of experiment of Taguchi Method. The experimental trials took place at cutting rotation of 635, 970 and 1420 rpm, feed rate of 0.10, 0.18 and 0.24 mm/rev, diameter tool of 10, 12 and 14 mm. The cutting of magnesium alloy was done by using a convensional drilling machine with TCA –35Erlo. Analysis of variance on the data of surface roughness value was done to get which factor is the most significant. The result shows that the feed rate is the most significant factor that contributed on the surface rougness value of machined surface. The minimum surface roughness value was attained at cutting rotation of 970 rpm, feed rate of 0.10 mm/rev and diameter of tool of 14 mm. Therefore, it can be stated that selecting the low feed rate factor produced low surface roughness value. Another hand, using high cutting rotation resulted low surface roughness value.Keywords—drilling, surface roughness, magnesiun AZ31,Taguchi Method

DECEPTIVE IS EFFECTIVE NEGOTIATION STRATEGIES TO CUSTOMERS FOR USING CONDOMS CONSISTENTLY Putu Sukma Megaputri; Putu Kusuma Dewi Dian Prima; Cindy Meilinda Sari; I Dewa Ayu Rismayanti
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

The Consistency of condom use by the sex customers is very low. These problems occur due to the lack of negotiations carried out by the sex workers into their customers. This study aims to determine the most effective negotiation strategies for the customers to consistently using condoms. The study was conducted by using a survey cross-sectional of sex workers directly with the sample of 100 peoples, which who selected by a random cluster sampling in Denpasar city. The data collected by interviews conducted by using a questionnaire about the characteristics and modification Condom Influence Strategy Questionnaire (CISQ) developed by Noar. The results of the study show that about 63% of customers consistently used condoms in the past week. The effective negotiation strategies used so that customers consistently using condoms is deceptive by sex workers to their client's variables associated with consistent condom use is the availability of condoms and sex worker's age. Deceptive is the most effective strategy to increase consistent condom use.Keywords— Negotiations Condoms, Female Sex Workers, Consistency of Condom Use

Design and Simulation of Air to Air Missile Homing System Rahmat Alfi Duhri; Rianto Adhy Sasongko; Yayom Dwi Laksmana
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

This paper will talk about AIM 120 AMRAAM missile guidance for pursuing a moving target. The missile guidance system itself consists of missile dynamics, control system, seeker, and guidance methods. For general purpose, the missile dynamics approach will use non-linear equation of motions. The control surface that will be discussed follow the rule BTT (Bank-to-Turn) and control system that will be used is PID control system that widely used for control design. Lastly, the guidance method that will be studied here is proportional navigation and constant bearing course approach. The simulation will be conducted using MATLAB Simulink. The Simulink model consist of target dynamics, and guidance system. From the result of simulation, it will be shown that the missile can pursue its target quite well. Hence, the simulation system can be used well for preliminary design purpose.Keywords—Homing System, Control System, Proportional Navigation, Missile Dynamics, Seeker, Bank-to-Turn, Constant Bearing Course.

DEVELOPMENT OF NUMERICAL PLATFORM FOR AIRCRAFT SYSTEMS SIMULATION Rianto A Sasongko; Yorgi A. Ndaomanu; Yazdi I. Jenie; M. Luthfi I. Nurhakin; M. Rafi Hadytama; Yusuf K Asalani
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

This paper discusses the development of a numerical simulation platform that can be used for representing the principal works of aircraft systems. The platform consists of some parts each of which is intended to replicate the operation of a system implemented in a modern aircraft, such as hydraulic line, electrical system, landing gear system, control system, etc. The platform is intended to be a tool for modeling and analyzing the operation and performance of certain systems configuration. To some extend the platform can be viewed as a virtual Iron Bird System. Iron Bird is a term representing a platform for simulating the works of aircraft systems using real components, which is very important for aircraft system development. At this stage, the numerical platform will only involve some sub-systems, namely main hydraulic line, control surface actuation, landing gear, and control system. These sub-systems are chosen to be the basis for further development where other sub-systems will be added and integrated to the platform.Keywords—Aircraft System, Numerical Simulation, System Analysis

Electric Power Optimizing Of Solar Panel SystemThrough Solar Tracking Implementation; A Case Study in Pekanbaru Adhy Prayitno; Muhammad Irvan; Sigit Nurharsanto; Wahyu Fajar Yantoa
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

Observations and measurements have been conducted towards a solar panel electric power output that is utilized by a solar tracking system. The electrical power output depends on the position of the sun and time and the direction of the panel surface against the angle of the incident light. For power optimization, the solar panel surface should always be directed perpendicular to the direction of the sunlight falling to the surface of the panel. The application of the solar tracking system controlled by a micro controller gives the expected results. The electrical power output of a static solar panel mounted on a fixed position becomes the benchmark of the output electric power value in this study. The measurement results of the electric power output of the solar panel with sun tracking system shows a significant increase in sunny weather conditions.The average increase of that is about 57.3%.Keywords: LDR, micro controller, optimal power output, performance improvment, sun tracking,

Design of Inward-Turning External Compression Supersonic Inlet for Supersonic Transport Aircraft Muhammad Adnan Utomo; Romie Oktavianus Bura
INSIST Vol 2, No 2 (2017)
Publisher : Universitas Lampung

Inward-turning external compression intake is one of the hybrid intakes that employs both external and internal compression intakes principle. This intake is commonly developed for hypersonic flight due to its efficiency and utilizing fewer shockwaves that generate heat. Since this intake employ less shockwaves, this design can be applied for low supersonic (Mach 1.4 - 2.5) intakes to reduce noise generated from the shockwaves while maintaining the efficiency. Other than developing the design method, a tool is written in MATLAB language to generate the intake shape automatically based on the desired design requirement. To investigate the intake design tool code and the performance of the generated intake shape, some CFD simulation were performed. The intake design tool code can be validated by comparing the shockwave location and the air properties in every intake's stations. The performance parameters that being observed are the intake efficiency, flow distortion level at the engine face, and the noise level generated by the shockwaves. The design tool written in MATLAB is working as intended. Two dimensional axisymmetric CFD simulations validation has been done and the design meets the minimum requirement. As for the 3D inlet geometry, with a little modification on diffuser and equipping vent to release the buildup pressure, the inlet has been successfully met the military standard on inlet performance (MIL-E-5007D). This design method also has feature to fit every possible throat cross sectional shapes and has been proven to work as designed.Keywords— Inward-turning, Supersonic, Engine Intakes, Low- noise, Design Method

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