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INDONESIA
Media Teknika
Published by Universitas Sanata Dharma
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
Arjuna Subject : -
Articles 54 Documents
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Alat Terapi Gerak Jari Tangan untuk Pasien dengan Cedera Plexus Brachialis Agustine, Lanny; Setiawan, Oscar; Joewono, Andrew
Media Teknika Vol 11, No 2 (2016)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (894.315 KB) | DOI: 10.24071/mt.v11i2.517

Abstract

People with damaged or injured plexus brachialisneed immediate therapy after the surgery, as an effort to restore the nerves function, even thou it is hard to achieve. But, continuous treatment may prevent the muscle to become stiff and shrink. So, patient needs assistive device to be used at home for regular self therapy.Physical therapy method was chose to be developed in this research because of lower risk than electrical therapy. This assistive device is designed in two modes, manual and automatic, and it is limited to fingers movement of adult’s right hand. Manual mode is focusing to 1 finger movement, while automatic mode will move the five fingers consecutively. The movement procedure is imitated those given in the clinic, by controlling the speed and angle rotation of a dc servo motor and certain design of lever for each finger.This assistive device works effectively for a certain fingers size. It takes 5.29 sec to finish one cycle in automatic mode, and about 2 sec in manual mode. The degree of finger movement yield by the device is about 20 degree less than finger maximum ROM for MCP and PIP joint of index finger, pinky, and thumb.
Penentuan Parameter Setting Mesin Pada Proses Corrugating Ongkowijoyo, Sylvia; Mulyana, Ig. Jaka; Mulyono, Julius
Media Teknika Vol 11, No 1 (2016)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (885.418 KB) | DOI: 10.24071/mt.v11i1.512

Abstract

Corrugating process is the process in making carton box which is  merging the top sheet of kraft paper (top liner), wave paper (paper medium) and kraft paper bottom (bottom liner) using glue. Output of corrugating process is corrugated sheet. The parameter of quality corrugated sheet is bursting strength. In the corrugating process, the value of bursting strength is influenced two factors: the speed and temperature of corrugator. In this study, we discuss the experiment to determine level of corrugator speed and temperature that can produce the maximum bursting strength. Response Surface Methodology (RSM) is used to design of experiment and analysis. RSM able to identify points outside the experimental area (order model I) and determine the point of maximum response with the method of steepest ascent, and may explain the relationship of quantitative independent variable responses (order model II). The result of this study is that optimum levels engine speed is 178 m / min and level temperature of 174.9 ° C. The optimum level of value response bursting strength of 13.8 kgf /mm2.
ANALISA KESUKSESAN LEARNING MANAGEMENT SYSTEM (Studi Kasus: USD Yogyakarta) Sriwindono, Haris; Tumiwa, Frisca
Media Teknika Vol 11, No 2 (2016)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (788.025 KB) | DOI: 10.24071/mt.v11i2.518

Abstract

Utilization Learning Management System in college used to improve learning services to students. The purpose of this study to examine the variables and indicators that affect the success of LMS systems with exelsa USD as a case study. The model used in this study was adapted from the model of success of DeLone-McLean. Questionnaires were distributed to the students and the samples taken by stratified random sampling, and obtained 448 respondents. Data were processed using Structured Equation Modeling, and conducted tests on the measurement model and the model structure. The variables used in this study is the quality system, the quality of information, emakaian, user satisfaction, individual impact and organizational impact. From the results of this study showed that the quality system and quality of existing information on LMS exelsa very influential on the use and satisfaction of users, the use of the system is not felt by the wearer have a positive impact on the individual, but the satisfaction in use that have a positive impact on individuals, as well as the individual impact seen also influence / impact positively on the organization (in this case the university).
Analisis Tegangan Roda Gigi Miring pada Transmisi Kendaraan Roda Empat berdasarkan AGMA dan ANSYS Sutanto, Hadi
Media Teknika Vol 12, No 1 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1549.212 KB) | DOI: 10.24071/mt.v12i1.943

Abstract

Two kinds of stresses in the gear teeth are root bending stress and tooth contact stress. These two stresses results in the failure of gear  teeth.  The root bending stress results in fatigue failure and contact stress results in pitting failure at the contact surface. The stress analysis used to minimize gear  failure in the  design of helical gear.  It is also optimize the  design of helical gear  on the transmission system of the truck motor vehicle, where the power transmission is required at heavy loads  with  smoother  and  noiseless operation.  In this  paper  bending  stress  and  contact  stress estimated  using analytical method while modeling of gears used the numerical solution. Method of beam strength  based on modified Lewis calculation used to predict the bending strength  of helical gears. Contact stress was estimated  using related method of AGMA contact stress. Stress modeling of helical gears is done by ANSYS 14.5, which is a finite element analysis package. The results are then compared with both AGMA and ANSYS procedures. The values of bending strength and contact stress determined using AGMA method found to be compatible with ANSYS simulation.
Karakteristik Briket Arang Sekam Padi dan Arang Kulit Bawang Putih Nurhilal, Mohammad; Tarigan, Roy Aries Permana
Media Teknika Vol 12, No 2 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.35 KB) | DOI: 10.24071/mt.v12i2.1081

Abstract

Indonesia is endowed with abundant  natural wealth capable of being transformed into an energy source. However, until now the utilization of natural resources can not be optimally processed. One alternative solution to make the fuel as a substitute for LPG is to fuel the briquettes. The general purpose of this research is the manufacture of briquettes from waste  materials such as rice husk and garlic skin. While the specific purpose of this research is to know the characteristic of proximate briquettes such as: water content, ash content, fixed carbon, volatile matter, and calorie briquettes, variations of glue composition glue 200, 250, 300 gram, kanji starch composition 20, 30, and 40 gram and paper pulp 50 w / w and 100 w / w of total weight of adhesive 20 gram, and jelantah cooking oil. Methods in this research are experimental approaches such as, making briquettes, and testing the characteristics of briquettes. The results of research on water content, ash content, fixed carbon, volatile matter and calorific briquettes of rice husk huskers were 33,493%, 39,966%, 29,058%, 30,923% and 3873,500 kal / gram respectively. While the characteristics of garlic skin briquettes produced the highest price respectively 35.986%, 9.650%, 42.373%, 34.479%, and 4783.654 cal / gram.Keywords: Characteristics of briquettes, rice husk, garlic skin.
Operasi Motor Induksi Tiga Fasa Pada Sistem Satu Fasa Prabowo, Petrus Setyo; Christianto, Second Adrian
Media Teknika Vol 12, No 2 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (691.956 KB) | DOI: 10.24071/mt.v12i2.1086

Abstract

At this time the 3-phase induction motors are needed in many areas including  small industries and in areas  having  only 1-phase electrical system. The area requires a motor  with a large driving force that can be operated with both normal and 1-phase  electrical system. An induction motor can work  ineither  normal  configuration  or modified configuration with  adding a series  of  capacitor motors in 3-phase induction motor. The series capacitors are used  with an auxiliary coil is placed on the side or sides of the coil which has a larger impedance. In this study,  the performance of 3-phase induction motors  is supported  with 1-phase electrical system coupled with the ACS758 current sensor . This coupling is  to measure the current value of the load being used. When the ACS758 current sensor detects  the passing current, it will display  the current value on the LCD which  facilitates  the user in the current value of the measured reading. Induction motor can work well and normal with 1-phase electrical system using a series of capacitor motors. Measurement with current sensor has an error less than 2%.Keywords: 3-phase induction motor, 1-phase electrical system, LCD
Pengaruh Hard Chrome Plating pada Peningkatan Kekerasan Baja Komponen Kincir Setyahandana, Budi; Christianto, Yohanes Eko
Media Teknika Vol 12, No 1 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1033.063 KB) | DOI: 10.24071/mt.v12i1.944

Abstract

 High carbon steel generally has a high hardness but lower ductility. To obtain a hard and ductile material, surface hardening can be done on a low carbon steel. Surface hardening can be achieved by hard chrome plating. The objectives of this research were: (1) Conducting the process of hard chrome plating on low carbon steel, (2) Knowing the increasing of surface hardness of low-carbon steel after the plating process in time variations, (3) Knowing the increasing of surface hardness of the low carbon steel after the coating process in anode-cathode distance variations. The specimens was made of low carbon steel. The size of the specimen were 40 mm in length, 35 mm in width and 6.8 mm in thickness. The variables measured were: (1) Coating time (t), (2) The distance between the cathode and anode in the coating process (l). After the coating process completed, the specimen surface hardness was measured by Vickers Hardness Tester. The results showed that up to 532 HV, low carbon steel hardness increased linearly at increasing time plating. At 120 minutes plating, the hardness also increased linearly at current densities up to 1.05 amperes/dm2. While at the current density of 1.1 amperes/dm2, the hardness increased significantly higher.
Pelacak Matahari Dua Sumbu Menggunakan LDR untuk Meningkatkan Absorbsi Matahari Parikesit, Elang; Purwadianto, Doddy; Sambada, FA. Rusdi
Media Teknika Vol 12, No 2 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (830.957 KB) | DOI: 10.24071/mt.v12i2.1082

Abstract

The position of the sun in the sky  always  changes  periodically.  A  lot of research has been doneto follow the sun's motion using a solar tracking system to increase the amount of solar energy that can be absorbed. The solar tracking system can be grouped into passive and active system. Active sun tracker system uses motor drive in following the motion of the sun. The current active tracking system is using one or two rotary axis. Active two-axis solar tracking system provides greater efficiency and effectiveness than one-axis solar tracking system. This study aims to increase the absorbable sun energy with a simpletwo-axis solar tracking system. This research has been  done by experimental method by making a model of two-axis sun tracker and  its field  data retrieval. The main parts of the model in this study are (1) LDR sensor, (2) microcontroller and  (3) motor drive.  Initial data of field test results shows  a maximum increase (269%) in absorbable solar energy on a model using a sun tracker than models that d o not use a solar tracking systemKeywords: tracker, sun, two-axis rotate, simple
Aplikasi Web Service Perbankan untuk Pembayaran Formulir Pendaftaran Mahasiswa Baru Adi, Puspaningtyas Sanjoyo
Media Teknika Vol 12, No 2 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (861.75 KB) | DOI: 10.24071/mt.v12i2.1087

Abstract

The new student registration process begins with the process of filling out  the registration form where to get it, the prospective student pays to get the form. Sanata Dharma University cooperates with the bank to develop an application to  pay registration form with web service technology. The advantage of this technology is electronic  service  and can work 24 hours. Web service technology is a service that allows communication between machines performed through a computer network with HTTP protocol web server. The web service application was developed and implemented by Sanata Dharma University and CIMB Niaga bank in October 2017. From the observation of January 2018 compared to January 2017, the January 2018 transaction increased by about 12% compared to January 2017. The proportion of web service transactions is around 30% of total transactions where 80% of them are conducted outside office hours. This data indicates that the knowledge of electronics services of prospective students and their parents is good enough.Keywords: web service, registration form, new students
Karakteristik Kinerja Mesin Diesel Stasioner dengan Bahan Bakar Campuran Biodiesel dari Biji Kemiri Sunan Ariani, Farida; Ginting, Elizabeth; Sitorus, Tulus Burhanuddin
Media Teknika Vol 12, No 1 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (746.403 KB) | DOI: 10.24071/mt.v12i1.945

Abstract

This study aims to investigate the characteristics of stationary diesel engines which use a mixture of diesel fuel - biodiesel from sunan candlenut seed. Experiments were done with diesel fuel, B5, B10, B15, and B20 with a variety of engine rotation and load variations. The results showed that the values of torque, power and thermal efficiency when the engine uses B5, B10, B15, and B20 tends to decrease if compared when engine use diesel fuel. And the specific fuel consumption when use B5, B10, B15, and B20 increased. From the results of experiments and calculations, the maximum power of 3.01 kW, minimum specific fuel consumption of 228.58 g/kWh and maximum thermal efficiency of 37.61% when using diesel fuel. However, exhaust emissions were measured include opacity, carbon monoxide and hydrocarbons when the engine using biodiesel B5, B10, B15, and B20 decreased. By using statistical study also obtained correlation and regression equations involving engine performance parameters.

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