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International Journal of Engineering, Technology and Natural Sciences (IJETS)

IJETS
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Published by Universitas Teknologi Yogyakarta

ISSN : - EISSN : 26853191 DOI : -

Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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.

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

Articles 121 Documents

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Rapid Assessment of Earthquake Threat Vulnerability in Campus 3 of University of Technology Yogyakarta Based on Android Application Dwi Kurniati; Eka Faisal Nurhidayatullah; Samsul A Rahman Sidik Hasibuan
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

The province of D.I.Yogyakarta is crossed by the Indo-Australian Plate which is one of the three world plates. The impact that occurs when an earthquake happens is the damage to buildings not only simple buildings but also multi-story buildings, such as School Buildings and Educational Facilities. The Campus 3 of University of Technology Yogyakarta is located at Jl. Prof. Dr. Soepomo, S.H. No.21, Muja Muju, the sub district of Umbul Harjo, Yogyakarta. The purpose of this study is to determine the results of the evaluation using the RVS method on a form that is filled out manually and by an application using ArGis. The method used in this research is FEMA 154-2015 which is adjusted to the regulations in Indonesia, namely SNI 1726-2019, and the results are analyzed quantitatively. Based on the checking of vulnerability of the campus building with the RVS High Seismicity form, the campus 3 building is of the type of reinforced concrete frame and functioning as a school. The results obtained show that the average of two buildings in the Campus 3 of University of Technology Yogyakarta is 2.3, and the RVS stops at level 1. Both conditions confirm that the two buildings have a risk that is not dangerous. Nevertheless, there should be a further supervision.

Slope Stability Analysis on Railroad Line in Lahat Lubuk Linggau, South Sumatra Rika Nuraini; Abul Fida Ismaili
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

The Lahat Lubuklinggau railroad line is a strategic railroad line in the DIVRE III area of South Sumatra. Several incidents have occurred there in recent years. The incidents indicate the condition of the railroad at Lahat Lubuklinggau crossing is prone to landslides and subsidence areas, which can disrupt rail traffic. Consequently, it results in the inconvenience of train travel, which threatens the safety of rail traffic if not immediately get comprehensive repair. This study aims to analyze the vulnerability of slopes in the Lahat-Lubuklinggau railroad area using the GEO5 program to determine the slope safety number, which shows the stability of the slopes. GEO5 programs are designed to perform deformation and stability analysis in geotechnical engineering. The analytical methods used include Bishop, Fellenius, Spencer, and Janbu. After modeling and analyzing slopes using the GEO5 program, the soil reinforcement increased the safety factors according to SNI 8460:2017. With the use of slope reinforcement, the increased value of the safety factor supports the operation of train travel in the Lahat Lubuklinggau South Sumatra.

Template Matching Algorithm Implementation For Introduction To Indonesian Traditional House Agus Sujarwadi; Joseph Carlo K; Iwan Hartadi TU; Erik Iman HU; Suhirman; A.Djoko Budiyanto; Suyoto; Natan Derek
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

Digital image processing is an important way in computer vision to determine the shape of digital image objects. Many image processing applications have been produced, one of which is pattern recognition. Pattern recognition can be interpreted as the process of classifying a number of objects into several categories based on similarities and similarities in characteristics. In this study, the pattern recognition of traditional houses in Indonesia will be carried out. In the pattern recognition process, several stages of image processing (image pre-processing) are needed which aims to make the pattern obtained can be recognized accurately. For the introduction of this traditional house, several stages will be carried out before it can finally be recognized by the system. First, the image will be converted into a gray image, after the gray image is obtained, it will be converted into a binary image using thresholding and then followed by normalizing the image size (resize). After that, the resized image will be recognized using the Template Matching method. The results of this study, using 20 examples of traditional house patterns categorized into 10 types of traditional houses in Indonesia, the system can recognize 16 traditional house patterns correctly with an accuracy percentage of 80%. But this system also still has imperfections. Imperfections occur due to several factors such as taking the angle of the object in the test image that does not match the angle of the object in the target image, and also the presence of additional objects that cover the shape of the traditional house that will be recognized; such as: trees, cars, etc., as well as poor test image conditions.

Variety of Changes in Spatial Patterns of Residential Space in Soropadan Village as an Impact of the Development of Economic Activities Suparno; Endah Tisnawati; Aisha Astriecia
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : Universitas Teknologi Yogyakarta, Yogyakarta, Indonesia

Reduced open land, traffic jams on the village's main road, disruption of the safety and comfort of the living environment are only a few effects that can result from the conversion of homes into student dormitories in the form of boarding houses. This also takes place in open residential neighborhoods outside of Yogyakarta, specifically in Soropadan Village, Condongcatur Village, Depok District, and Sleman. Descriptive qualitative research methodology is employed in this study. The decision is taken taking into account the occurrences that are seen in the field. Direct field observations were used to gather the primary data selection technique, which was subsequently used to collect data utilizing qualitative data techniques. In order to understand the numerous changes in the spatial pattern of residential housings discovered in the boarding house type student dormitory in Soropadan Village as a result of the development of economic activities, this study attempts to determine the tendency of the spatial pattern of settlements. The study's findings include the similarity of changes to the spatial layout of residences into boarding-type student dormitories with a linear layout, the spatial arrangement of boarding rooms and shared rooms forming a centralized layout with the shared room serving as the center of activity in student boarding houses, and the propensity to add boarding rooms. The location of the service area, including restrooms, laundry facilities, and kitchens, is always at the rear of the building, immediately before the road. Economic development, environmental changes, population increase, and the creation of local infrastructure are all reasons that can cause a home's usage to change from a residential to a dorm-style boarding house for students.

Analysis of Liquefaction Potential Based on SPT and CPT Data in the Yogyakarta International Airport Area Abul Fida Ismaili; Adwiyah Asyifa
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

The occurrence of earthquakes will cause damage to building structures as well as damage to soil structures. One of the impacts is Liquefaction, which is a process or event of changing the state of the soil from a solid state to a liquid state caused by a cyclic load at the time of the earthquake so that there is a change in the voltage in the soil. Analysis method of potential liquefaction using simplified method, based on SPT and CPT data. From the data, cyclic stress ratio (CSR), Cyclic Resistant Ratio (CRR) and security factors were obtained. Based on the calculation analysis, it is known that there is a potential liquefaction in YIA area with different depth variations according to the location of data retrieval with an earthquake magnitude of 7.5 SR.

Energy Consumption of Workers in the Palm Fruit Calcium Inspection Process by Wearing Masks to Go Up and Down Stairs during the Pandemic Agustina Hotma Uli Tumanggor; Cynthia Eka Fayuning Tjomiadi; Madschen Sia Mei Ol Siska Selvija Tambun
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

The increase in the use of masks during this pandemic has greatly affected work. Wearing mask cuases difficulty in breathing when workers do their work by going up and down stairs. Workers are required to wear masks when checking calcium in reservoirs with the height of about 5 to 10 meters from the ground level at PT. Wijaya Borneo Tiganna. The purpose of this study was to identify the energy consumption of workers wearing masks in working up and down stairs during a pandemic. The method used was Cardiovascular Load (%CVL) and energy consumption of workers before and after wearing masks when going up and down stairs. The results of the study obtained that the %CVL value was 38.37% and was included in the level of need for improvement. The average energy consumption of 3.31 Kcal/minute is included in the light category.

Decision Support System to Determine Higher Education Resource Needs Using Accreditation Assessment Standards Damar Prasetyo
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 4 No 2 (2022): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

Accreditation is an activity to evaluate the eligibility of programs and academic units based on predetermined criteria. In an educational institution, accreditation is an important thing to do to improve quality in the field of education because the aim is to improve quality which includes all aspects of education in the form of science, administration, as well as teaching, and educational staff. College managers really need a decision support system that can produce several alternative strategic decisions quickly and accurately. The existence of decision support system tools used to make strategic decisions makes the manager's work lighter and the results are more accurate. In this study, a decision support system approach was applied to determine the resource requirements of tertiary institutions using accreditation assessment standards consisting of a management subsystem model, data management subsystem, and user interface management subsystem. The result of the research is a design of a decision support system that can be used in an educational institution for determining the need of higher education resources.

Identification of Medicine Leaf Images Using Invariant Moment and K-Nearst Neighboor Fredianto; Enny Sela; Suhirman; Ardhi Wicaksono Santoso
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 3 No 1 (2021): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

Medicinal plants have benefits for preventing or curing various diseases. The number of medicinal plants and the lack of knowledge about the types of medicinal plants make it difficult for people to distinguish the types of medicinal plants. This difficultness causes people to prefer to use chemical drugs rather than medicinal plants. This study develops a system of identification of medicinal plants. There are four steps to build the system: input leaf images, pre-processing, invariant moment feature extraction, and K-Nearest Neighbours (K-NN) pattern recognition. A 100 images samples images from 5 types of medicinal plants were involved in this study. The identification process of leaf image begins with the cropping, resizing process, and several morphological operations. Then feature extraction stage uses invariant moments. The final stage of pattern recognition uses K-NN. The result of this research is that the system can identify the types of medicinal plants. Using the Manhattan distance, the study archives the highest average accuracy.

Development Of a Persuasive and Universal Wearable Device to Promote Healthy Behavior and Enhance Exercise Self-Efficacy Yansen Theopilus; Johanna Octavia; Thedy Yogasara
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 3 No 1 (2021): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

Exercising is a key activity to prevent diseases and strengthen our immune system. Unfortunately, people often find it difficult to have healthy behavior, especially for exercising regularly. There are some reasons for that problem, such as lack of exercise knowledge, lack of equipment, lack of available time and space, lack of exercise partner, and poor physical conditions. This behavior problem would make people vulnerable to illness. Therefore, this research aims to develop a wearable device to assist users’ exercise activity and encourage them to have exercise self-efficacy while ensuring a positive experience. The device development method used a combination of persuasive design, universal design, and rich experience design approach. The persuasive approach aims to design the product that can change the behavior problem into the behavior goal, while the universal design principle ensures that the device suits various user characteristics. We also use a rich experience design approach to generate a positive experience from negative emotions. This research has invented a smart exercise band that acts as an exercise instructor, partner, and reminder that recommends various personalized exercise programs according to the user characteristics (gender, age, physical condition, schedule, and other preferences). The device was evaluated using Task Completion Method, Retrospective Thinking Aloud, and Perceived Persuasiveness Questionnaire to assess the usability, persuasiveness, and experience. The evaluation results have shown that the product has good usability, effective persuasion, and positive experience.

A New Metaheuristic Farmland Fertility Algorithm to Solve Asymmetric Travelling Salesman Problem Kevin Grahadian; Ignatius A. Sandy
Jurnal Internasional Teknik, Teknologi dan Ilmu Pengetahuan Alam Vol 3 No 1 (2021): International Journal of Engineering, Technology and Natural Sciences
Publisher : University of Technology Yogyakarta

Asymmetric travelling salesman problem (ATSP) is an optimization problem which a salesman needs to visit all the city. In ATSP case, range from city A to city B is not the same as city B to city A. The purpose from this problem is to find a route that conclude the shortest possible route for the salesman. In this experiment, Farmland Fertility (FF) Algorithm is used to find the solution for ATSP problem. FF is a metaheuristic that inspired from farming activity. FF sees farmers that farm to get a high-quality plant to sell with high price. The farmers usually divide their farmland into some sections, and they try to give that section special materials or treatments depend on the soils. There are 3 parameters that will be the focus in this experiment. This study will design the farmland fertility algorithm to solve ATSP and find which parameters affect the result. The 3 parameters are ???? that act as special materials to give to the worst section, ???? that act as special materials to give to other sections, and ???? is possible combining soils. ANOVA is used for 27 combinations parameter to implement into five ATSP benchmarks. From the result of ANOVA, ???? have a significant impact to the algorithm performance. After all the parameters are set, the algorithm is implemented to study cases from BR17, FTV33, FTV44. FTV55 and FTV70. This algorithm only can find the best known solution on BR17, while on other study cases this algorithm cannot find the best known solution.

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Contact Name
Ahmad Tri Hidayat / Suhirman

Contact Email
ijets@uty.ac.id

Phone
+6285647229564

Journal Mail Official
ijets@uty.ac.id

Editorial Address
Universitas Teknologi Yogyakarta - Kampus 1. Jalan siliwangi, Jombor, Sleman, D.I. Yogyakarta

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Ahmad Tri Hidayat / Suhirman

Contact Email ijets@uty.ac.id

Phone +6285647229564

Journal Mail Official ijets@uty.ac.id

Editorial Address Universitas Teknologi Yogyakarta - Kampus 1. Jalan siliwangi, Jombor, Sleman, D.I. Yogyakarta

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Ahmad Tri Hidayat / Suhirman

Contact Email
ijets@uty.ac.id

Phone
+6285647229564

Journal Mail Official
ijets@uty.ac.id

Editorial Address
Universitas Teknologi Yogyakarta - Kampus 1. Jalan siliwangi, Jombor, Sleman, D.I. Yogyakarta

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA