International Journal of Engineering, Technology and Natural Sciences (IJETS)
Journal IJETS concern in publishing the original research articles, review articles from contributors, and the current issues related to engineering, technology and natural sciences. The main objective of IJETS is to provide a platform for the international scholars, academicians and researchers.
Articles
91 Documents
<![CDATA[REDESIGN N METAL CASTING TOOLS USING ANTHROPOMETRY AND QFD ]]>
<![CDATA[Nugroho, Andung Jati]]>;
<![CDATA[Kusumaningsih, Erma]]>;
<![CDATA[Yuamita, Ferida]]>;
<![CDATA[Pradana, Aldi Yoga]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 1 No 2 (2019): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University Of Technology Yogyakarta ]]>
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DOI: 10.051018/ijets.v1i2.46
<![CDATA[The case in the metal casting process is when the metal is melted and then poured into a liquid metal reservoir and then poured into a pouring tool and then poured into a mold. In the process of pouring into the mold is still using manual equipment, namely by using wood which ends have a container such as a bucket ( bucket)) made of a mixture of white cement, brick fire sand and clay and the metal liquid pouring tool has a length of 1.5 cm, a weight of 5 kg with a diameter of 15 cm and a height of a container for liquid metal 20 cm does not include the load. If the pouring device filling with liquid metal, then the weight reaches ± 20 kg, with a weight of ± 20 kg the worker must pour the liquid continuously into the mold and at least each worker must go back and forth 6 times pouring metal liquid into a mold in a single combustion process. Based on the nordic body map questionnaire data as many as 8 workers felt pain in the shoulder and arm because the burden was born, resulting in workers often feel pain in the muscles of the arms and back. Because the wooden handle used to pour metal liquid is too slippery (exposed to sweat), so there is a need for improvement in activities. From the results of the above observations, it is necessary to design ideas for new work facilities. It expects to affect the improvements related to the position of the hand in the process of pouring liquid into the mold. Then the design idea needs to be done in the form of a casting tool that has been modified and can be used according to user needs and can be said to be ergonomic, safe, and comfortable. The method used in designing castings is quality function deployment and anthropometric techniques.]]>
<![CDATA[ANALYSIS OF HUMAN RESOUCE PLACEMENT BASED ON ABILITY AND WORK SKILLS USING THE PROFILE MATCHING METHOD ]]>
<![CDATA[Sumiyatun]]>;
<![CDATA[Faizal, Edi]]>;
<![CDATA[Wasiati, Hera]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 1 No 2 (2019): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University Of Technology Yogyakarta ]]>
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DOI: 10.051018/ijets.v1i2.47
<![CDATA[Human resource management is closely related to employee performance to provide the best service to companies and steak holders. The right placement is a way to optimize the ability, skills towards good work performance for the workers themselves. The right position will be able to help the company (organization) in achieving its goals. Analysis of decision support systems developed in this research uses the Profile Matching method. Criteria for placement of employee positions based on aspects of personality and aspects of work attitude. The results of this research are an analysis used to rank employee competencies that will occupy employee positions in the public relations and admissions departments.]]>
<![CDATA[IMPROVED COMMUNICATION OF PARENTS AND TEACHERS BY USING ANDROID-BASED APPLICATIONS AS A MEDIA FOR FORMING CHARACTER CHILDREN AT AN EARLY AGE IN ELEMENTARY SCHOOL SD. TAMAN SARI 3 YOGYAKARTA ]]>
<![CDATA[Wibawa]]>;
<![CDATA[Widyastuti, Titik Mulat]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 1 No 2 (2019): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University Of Technology Yogyakarta ]]>
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DOI: 10.051018/ijets.v1i2.48
<![CDATA[The process of character building for early childhood students is not optimal due to lack of communication between parents of students and teachers. This lack of communication is caused by teachers' fear of being violating human rights when giving educational punishment or warning to students who have broken the school rules (are not disciplined). To overcome this problem there needs to increase communication between teachers and parents of students, so there is no misunderstanding of the information received. An android-based application is used to facilitate communication between parents and teachers. This application has facilities in the form of information on student violations records, activities at school, tasks that must be done at home, and the amount of attendance. By using the application, parents can monitor and be notified related in real time. The location of this research was conducted in elementary school. SD. Neg Taman Sari 3 Yogyakarta with research subjects are parents of students and class teachers and the total number of respondents was 35 people. This research was conducted using a descriptive method with a quantitative approach. Data collection techniques used were observation, interviews and documentation. The results of testing the effectiveness of communication between parents and teachers, and monitoring parents of their children's activities carried out before and after using the application. Data analysis using T Test using SPSS ver. 17, the result of the significance value (2-tailed) is 0,000 (p < 0.05). T test results showed a significant influence on communication problems. The results of the pretest and posttest Mathematics achievement scores with "Mean Paired Differences" obtained an average value of 7.5750 and 7.9953. This result is difference shows the influence of communication between teachers and parents of students.]]>
<![CDATA[UTILIZATION OF AUGMENTED REALITY TECHNOLOGY IN 3D VISUALIZATION OF HIGH SCHOOL OF ADISUTJIPTO TECHNOLOGY BASED ON ANDROID ]]>
<![CDATA[Kusumaningrum, Anggraini]]>;
<![CDATA[Ayuningtyas, Astika]]>;
<![CDATA[Lopes, Jodio Blasius]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 1 No 2 (2019): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University Of Technology Yogyakarta ]]>
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DOI: 10.051018/ijets.v1i2.49
<![CDATA[Adisutjipto College of Technology in introducing campus information that is still using print and internet media, therefore, an application is needed that can introduce and provide information on buildings on campus by utilizing Augmented Reality technology. With the technology of Augmented Reality able to provide real information and can interact directly with buildings on campus. This application was created using the Unity and Vuforia application. Making 3D models using the Google SketchUp application which is then exported to the Unity application. Testing is done to detect markers of light intensity, distance, marker size, and color. From the results of testing markers for light intensity of at least 4 lx and effective detection distance between 20 cm to 40 cm and marker size of at least 350 x 350 Pixels, while the color has no effect due to edge detection which is the basic technique of reading by Vuforia markers. This application has been successfully made in Augmented Reality in the form of STTA 3D visualization as a supporting medium for the introduction of the Adisutjipto College of Technology Yogyakarta environment. This application can only be run on Android-based smartphones with a minimum version of 5.0.]]>
<![CDATA[STUDYING THE STABILITY BY USING LOCAL LINEARIZATION METHOD ]]>
<![CDATA[Abdulghafoor Jasim Salim]]>;
<![CDATA[Ebrahem, Kais Ismail]]>;
<![CDATA[Suhirman]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 2 No 1 (2020): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University of Technology Yogyakarta ]]>
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DOI: 10.46923/ijets.v2i1.57
<![CDATA[Abstract: In this paper we study the stability of one of a non linear autoregressive model with trigonometric term by using local linearization method proposed by Tuhro Ozaki .We find the singular point ,the stability of the singular point and the limit cycle. We conclude that the proposed model under certain conditions have a non-zero singular point which is a asymptotically salable ( when 0 ) and have an orbitaly stable limit cycle . Also we give some examples in order to explain the method. Key Words : Non-linear Autoregressive model; Limit cycle; singular point; Stability.]]>
<![CDATA[PUSHOVER STUDY ANALYSIS OF PGRI FACULTY OF ENGINEERING BUILDING ]]>
<![CDATA[Kurniati, Dwi]]>;
<![CDATA[Bali Loko, Pelipus]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 2 No 1 (2020): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University of Technology Yogyakarta ]]>
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DOI: 10.46923/ijets.v2i1.60
<![CDATA[The Faculty of Engineering Faculty of Engineering Building of PGRI Yogyakarta (UPY) is planning to be on medium ground, with a height of 7 floors functioned as a lecture hall.This building needs to be simulated the thrust of the earthquake load, in order to know the performance of the building.The purpose of this research is to want to know the performance value of poit direction x and direction y and performance level based on ATC 40 from upy engineering faculty building.Research method with the help of Etabs v16 software, in accordance with the guidelines of the National Standardization Agency namely SNI 1726-2012 and SNI 2847-2013.The results of the study obtained a peformance point value for push x 0.004 of 0.004 and push y of 0.003.As well as the level of performance is Immediate Occupancy (IO) which can be interpreted that in the event of an earthquake the structure is able to withstand an earthquake, the building does not suffer structural and non structural damage so that the building can be directly reused.]]>
<![CDATA[METHOD COMPARISON ANALYSIS SIMPLE ADDITIVE WEIGHTING (SAW) WITH WEIGHTED PRODUCT (WP) METHOD IN SUPPORTING THE DECISION TO ACCEPT NEW EMPLOYEES ]]>
<![CDATA[Ramadhan, Idham]]>;
<![CDATA[Zaky, Umar]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 2 No 1 (2020): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University of Technology Yogyakarta ]]>
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DOI: 10.46923/ijets.v2i1.66
<![CDATA[Employee selection is the first step in a company or agency that aims to obtain qualified and competent human resources that will serve and do all the work on an instinct. The process of selection of prospective employees has two decisions that are accepted and rejected. When an agency or company is unable to determine the human resources that fit the required criteria, it will be very detrimental for an agency or company more than the number of prospective employees who register will be troublesome in terms of calculation and determining competent human resources and in accordance with the required criteria. In this case to minimize or solve the problem, the author designed and built a system to help the agencies, especially Gunung Jati Regional Hospital (RSD) in terms of the selection of new employee admissions. The development of this system by analyzing two methods, namely Simple Additive Weighting (SAW) method with Weighted Product (WP) method with the specified criteria. These two methods will be compared to get a good method and relevant to be applied in the selection of new employees at Gunung Jati Hospital so that the human resources received really match the needs of the agency. Analysis is carried out using the accuracy of each method by referring to the original data owned by the institution. The result of saw method conformity or percentage level is 99.959996% with an accuracy value of 84% and wp method of 99.959992% with an accuracy value of 76%. Thus the SAW method is the most relevant method to solve the problem of receiving new employees.]]>
<![CDATA[RADIO FREQUENCY IDENTIFICATION AND IMAGE-BASED FACIAL IDENTIFICATION AS AN EMPLOYEE ATTENDANCE SYSTEM ]]>
<![CDATA[Raden Andy Kurniawan]]>;
<![CDATA[Zaky, Umar]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 2 No 1 (2020): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University of Technology Yogyakarta ]]>
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DOI: 10.46923/ijets.v2i1.67
<![CDATA[The current development of microcontroller technology can be used to build a presence system for employees. The employee attendance system uses radio frequency identification and facial identification which is designed and built to make it easier to do attendance data recording, so that the data obtained can be precise and accurate. Data collection techniques, namely by interview and observation. The application development process uses the PHP and Python programming languages ​​with Visual Studio Code software applications, Arduino Uno, MySQL software as a database server, and XAMPP as a support. The input used in this system is the employee's personal data and the results of employee face data retrieval which are stored in the .jpg format. The faces taken were taken from 4 people where each face was taken 20 face samples. The results are in the form of web and applications that will provide solutions to existing problems. The conclusion of this application makes it easy to do the recording and attendance, and minimize the fraud committed by employees. Retrieval of face data was taken as much as 20 data with the highest level of accuracy was 87% when the presence test was carried out.]]>
<![CDATA[A A Wind Forecasting Model Using Regression and Genetic Algorithm to Solve Economic Dispatch for Evaluating a Hybrid Power System ]]>
<![CDATA[Rahman, Haidar]]>;
<![CDATA[Budi Prasetyo, Ridwan]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 2 No 2 (2020): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University of Technology Yogyakarta ]]>
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DOI: 10.46923/ijets.v2i2.69
<![CDATA[In this research, the problem to find an evaluator to determine a location to build the standalone power system can be seen as problem which can be solved with Kernels Regression where, it will receive 2 inputs such as time and wind speed in order to predict the future wind speed. Afterward the obtained predicted wind speed will be converted into potential electrical energy with maximum and minimum energy and we will be using the Genetic Algorithm (GA) to solve the Economic Dispatch (EDC) to see the operational cost when dispatch into the grid. The data was taken from Baron Techno-Park and PLTH Pantai Baru, and will only be using data from the month of September - December since it is the rainy season. Therefore, since significant parameters such as energy per currency will show that operational cost of Baron Techno-Park have the least operational cost then PLTH Pantai Baru, hence the creation of renewable power plants in Baron Techno-Park are suitable and will have a good operational cost justification. Keywords: Economic Dispatch, Genetic Algorithm, Kernels Regression Standalone Power Plant.]]>
<![CDATA[IoT Prototype Development of Automatic Fish Feeder and Water Replacement ]]>
<![CDATA[Ratnasari, Devi]]>;
<![CDATA[Rodhiyah]]>;
<![CDATA[Pramudwiatmoko, Arif]]>
<![CDATA[ Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 2 No 2 (2020): International Journal of Engineering, Technology and Natural Sciences ]]>
Publisher : <![CDATA[University of Technology Yogyakarta ]]>
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DOI: 10.46923/ijets.v2i2.71
<![CDATA[In raising the freshwater fish in the aquarium, we need to pay attention on the fish’s health by noticing the feeding time and the aquarium cleanness. The busy fish owners sometimes do not have time to clean the aquarium and replace the water. The food is even not given regularly. The system which can be developed to help the fish owners in handling the problems in raising the fish is the scheduled automatic feeding monitoring system and automatic water changer when the water has turned turbid. The system is developed by using the NodeMCU ESP8266 as the controlling center and in the same time it helps the system to connect to internet. The system is equipped with the website page to help the fish owner in monitoring the aquarium condition from the distance.]]>
