Conference SENATIK STT Adisutjipto Yogyakarta (Seminar Nasional Teknologi Informasi dan Kedirgantaraan)
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193 research outputs found
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Effects of Electrode Movements on Smaw Welding to The Quality of ST-37 Steel Welds
No full textMany factors affect the welding results including electrode movement, welding current and electrode type. This study aims to determine the effects of electrode movements on SMAW welding to the quality of ST-37 steel welds. The quality reviewed includes microstructure, tensile strength, yield stress and weld defects. The study used ST 37 Steel with thickness 10 mm and a size of 100 mm x 200 mm, open V seam with an angle of 600 degree. E 7016 series electrodes had a diameter of 3.2 mm. Welding current 90-92 amperes, polarity DC +, welding voltage 25 volts and travel speed 8-10 cm / minute. Electrode movements variations include straight, zig-zag and spiral movement. The results showed that the micro structure of the Acicular Ferrite (AF) on the electrode spiral movement looks uniform, tight, dominates the area, the spiral movement of the electrode provides the highest tensile strength and the highest yield strength and the electrode spiral movement does not produce welding defect
Implementation of Mel Frequency Cepstral Coefficient and Dynamic Time Warping For Bird Sound Classification
No full textLovebird (Agapornis) is a type of bird that has become the belle of new pet birds lately. The interest of the hobbyist in this one song is because Lovebird has a unique chirp. For beginner lovebird fans, the lack of knowledge and experience about lovebird birds results in various cases of fraud in choosing a quality lovebird. They were disappointed expensive lovebirds that had been purchased but did not match what was expected.Lovebird chirping voice recognition can be learned and recognized through the learning process of speaker recognition, which is part of voice recognition. Speaker recognition captures the frequency of the lovebird's voice, then compares it with the sound frequency of the existing training data. The sound frequency and the long duration of chirping of lovebird birds will be extracted through the Mel-Frequency Cepstral Coefficient (MFCC) method. Information in the form of Mel Frequency Cepstrum Coefficients from input data and training data is then compared to the Dynamic Time Warping method. The methodology used in this study uses the grapple method.The results of this study were obtained an accuracy value of sound validation by 80%. It is hoped that with the capabilities of this system, it can help bird chirping lovers know the sound quality of lovebird birds that are good, moderate, and less. Also, it can help the jury of birds chirping, so that it can be used as an accurate standard in classifying lovebird sounds
Analysis of A Business Feasibility Study Using A Business Model Canvas For The Establishment of A Subsidiary in the Training Provider Field
No full textPT. XYZ is a company engaged in aircraft MRO (Maintenance, Repair and Repair) services by providing integrated solutions for all of its customers. Unit Learning Services at PT. XYZ has the task of organizing education and training. In accordance with the plan of PT. XYZ, Learning Services Unit is focused on preparing to spin off to become a subsidiary engaged in the Provider of Training. This study aims to determine what kind of subsidiary business model will be created using the canvas business model and conduct a business feasibility study, whether it is feasible or not. The results of this study are based on the canvas business model which has the following proposition values: (1) Highly qualified instructors with years of experience in aircraft maintenance; (2) Aircraft access for training; (3) Spacious classrooms including ACT instructors for Airbus qualified training classes; (4) Adjustable training for customer needs; and based on aspects that are processed for the establishment of a subsidiary is declared feasible
Development of Good Procurement Information System Web Based at PT. XYZ
No full textPT. XYZ is one of the companies engaged in the production of motorcycle spare parts. In carrying out its operational activities, PT. XYZ has a procurement process. Generally in applying of good procurement, employees must submit a document submission of goods in the printed form and must meet their supervisor directly to ask for approval in a signature. This condition requires quite a long time until the submission document reaches the Director because they have to wait for the signature of each related section. That is quite an obstacle for the employee who submits because the longer the approval process, the longer the procurement process. To overcome this obstacle, a good procurement information system web based was built using phased development methodology. The information system uses SQL Server as database and ASP.Net as programming language. Good procurement information system web-based can accelerate the procurement process
Analysis Turn Around Time C03-Check Package on Airbus A320-200
No full textAircraft maintenance is one of the consequences due to aircraft utilization. C03-check package on an Airbus A320-200 aircraft is one of the scheduled maintenance with interval every 22,500 flight hours, or 15000 flight cycles, or 72 months whicever comes firts. As one of scheduled maintenance, the planning of maintenance activities must be planned as well as possible to make activities carried out efficiently and effectively in terms of time and resources. Preliminary data to make the planning is sourced from the MPD (maintenance planning document).The data included of the scope of work, manhours, and man power. The data obtained is processed using the CPM (Critical Path Method). The results of data processing, it is obtained that the C03-check package on the Airbus A320-200 aircraft takes 4 (four) days, with the critical path on the AD-D1-D2-D3-D4-D4-D5-D6-D7-G aircraft, in the area empenage access panel with the number of hours needed is 41.3 hours.
Influence of Deflector Using on The Performance of Modified Savonius Water Turbine Vertical Axes
No full textSavonius turbine is a simple vertical axis turbine which work because of a difference drag force between blades. This turbine can convert kinetic energy on water flow into mechanical energy. The Savonius water turbine can work on low water flow speed. This research aimed at a Savonius turbine that has some of its parameters modified. The research tested the effects of water flow speed and the use of a deflector towards the modified Savonius turbine’s performance. It is concluded that Savonius turbine without the deflector, reached a maximum power coefficient at the flow speed of 1,1 m/s with the value of 0,163 at tip speed ratio of 0,845. As for the same speed (1,1 m/s) the turbine that used the deflector reached a maximum power coefficient of 0,307 at tip speed ratio 1,136. The highest coefficient of power was reached when the turbine got tested with the deflector at flow speed of 0,9 m/s with value of 0,354 at tip speed ratio 1,230
Implementation of QR Code on E-Certificate for Events at Maranatha Christian University
No full textEvery participation in the activity is always proven by the presence of a certificate. Issuance of certificates requires fees for paper, printing and distribution. The emergence of the era of paper less should be able to transform the presence of the certificate. Paper less is stopped by the presence of digital documents that can be accessed independently (portable), easily and across platforms. Portable Document Format or abbreviated as PDF one of the popular documents that can be distributed via the internet. So that PDF can be used as a document base to realize e-Certificate. However, it is necessary to develop a good application to facilitate the presence of the e-Certificate, and present solutions related to the authenticity of the certificates produced
Application of Discrete-Event Simulation in Health Care : A Preliminary Studies
No full textSimulation is one of the tools to solve the problems in a system, including hospital systems. The hospital has objectives and entities that are different from other systems, namely service to patients (humans) primarily, so making some decisions requires consideration due to the complexity of the variables within them. This preliminary study will discuss what problems might occur in the hospital and how the application of the simulation in solving the problem. Based on observations and interviews conducted, it is known that there are four issues: 1.) hospital services 2.) labor allocation (nurses) 3.) capacity and number of rooms/beds 4.) drug supply. Based on the literature search results, it is known that the simulation has the ability to solve these problems. The results of this literature review will then be used as a basis for developing simulation models in hospitals which are the object of research
Scada as a Smarthome for Light Control Home Fence Door Control and Curtain Control Based on Schneider PLC M221
No full textSmarthome is made to help relieve human work in the field of automation in residential environments. The purpose of this system is to control the lamps, curtains, and fence doors, which are equipped with the HMI (Human Machine Interface) to display the process in real time. The system of this smarthome is made using Schneider TM221CE24R PLC as a controller. This smarthome controls the lamp with five different lighting brightness conditions by using a UV (Ultraviolet) sensor, controlling the open and close fence doors using the PIR (Passive Infrared) sensor, and controlling the curtains with three different conditions (open full, half closed, full lid) with the LDR sensor. The control of these Smarthome objects is displayed in an HMI (Human Machine Interface). The Operator can monitor the objects that are currently working through the HMI view. Through the testing stage of the tool, there is a conclusion that this smarthome can control objects well
Conceptual Design of Electrical Ducted Fan (EDF)
No full textElectric Ducted Fan (EDF) is an electric propulsion consist of duct, fan and electric motor with main power source is from battery which generates compression air for thrust. EDF is used as an alternative propulsion for high speed UAV especially for target UAV or “bomb” controlled UAV. It’s design is very simple and no need extra maintenance compared to jet engine. Design process of an EDF is more simple than a jet engine, nevertheless it could obtain enough thrust for high speed flying. The aim of this research is to design an EDF as an alternative propulsion for high speed UAV and performance analyzing of EDF using analitical approach. Design of EDF produce an EDF with inlet and outlet diameter are 70mm and 60mm. Total length of EDF is 116,1mm. Performance analysis of EDF shows that by 700W of motor power could reach 16N of thrust which is accepted performace for 70mm EDF