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International Journal Science and Technology (IJST)
Published by Asosiasi Dosen Muda Indonesia
ISSN : 28287223     EISSN : 28287045     DOI : https://doi.org/10.56127/ijst.v1i2
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
International Journal Science and Technology (IJST) is a scientific journal that presents original articles about research knowledge and information or the latest research and development applications in the field of technology. The scope of the IJST Journal covers the fields of Informatics, Mechanical Engineering, Electrical Engineering, Information Systems and Industrial Engineering. This journal is a means of publication and a place to share research and development work in the field of technology.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 93 Documents
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PERFORMANCE ANALYSIS OF THE THERMOELECTRIC TEC 12706-BASED COOLING SYSTEM IN COOLER BOX DESIGN Abdul Muchlis; Kurnia Yogo Utomo; Supriyono; Tri Mulyanto
International Journal Science and Technology Vol. 2 No. 1 (2023): March: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i1.859

Abstract

The most widely used refrigeration machine today is a refrigeration machine that operates with a vapor compression cycle (SKU). To operate a vapor compression machine, refrigerant is needed as a working fluid. The most widely used refrigerants are chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) refrigerants. However, their use can damage the ozone layer and has a great potential to increase the effects of global warming. Therefore, a refrigeration system that is environmentally friendly and also has low power is needed, this can be fulfilled by using thermoelectric. This research was conducted to analyze the performance of temperature differences, heat absorbed, cooling capacity and COP in thermoelectric-based cooler boxes, thermoelectric performance with variations in input voltage and with variations in the addition of heatsinks where the method used is experimental by controlling the variable input voltage. From the research results, the calorific value absorbed is proportional to the increase in the applied voltage. Where the greater the voltage applied, the heat absorbed will be higher and the input power that enters the thermoelectric module is directly proportional to the incoming voltage where the greater the voltage. Then the power that goes into the thermoelectric will also be even greater. Whereas the COP value will decrease as the voltage increases and the best thermoelectric performance is with a voltage of 10 V. This can be seen after 60 minutes, the temperature difference value is 6.6 0K, the absorbed calorific value is 19,150 W, and the COP is 0.921. The thermoelectric performance is not only based on the COP value but also based on a review of the electric power consumed and the cooling speed during the 60 minute test. Then for the addition of a copper heatsink the COP value is 0.4832 and the temperature drop in the cooler box is only 3.9 0K, the value is lower than without the additional heatsink due to the gap between the aluminum heatsinks.
REDESIGN OF IPUSNAS APPLICATION USING USER CENTERED DESIGN METHOD Muhammad Rafi Pradana; Nuryuliani
International Journal Science and Technology Vol. 2 No. 1 (2023): March: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i1.866

Abstract

The National Library of Indonesia (Perpusnas) is one of the libraries that already uses a Digital Library named Ipusnas. Ipusna provides access to literature available at National Library via smartphone. However, the Ipusnas application only gets a rating of 3.5 on the Google Playstore. This rating was obtained because the Ipusnas android application still has deficiencies, which is the User Interface and User Experience are still less modern and confusing in finding information. In this study, a redesign was developed using the User Centered Design method and Tested using A/B Testing. Results of the System Usability Scale Questionnaire From the calculation results using the System Usability Scale formula, the average score for evaluating the Ipusnas android application is 61.2. From the results of this SUS score, the research can be continued so that the Redesign of Ipusnas android application better than old one. Based on the evaluation results using the A/B Testing method, it can be concluded that users prefer the new design with a percentage value of 64% compared to the old design of 36%.
IMPLEMENTATION OF NETWORK WEBSITE TECHNOLOGY IN COMPANY BRANDING PROFILE Wisnu Sukma Maulana; Andre Pratama Adiwijaya
International Journal Science and Technology Vol. 2 No. 2 (2023): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i2.867

Abstract

A website is a network-based information medium that can be accessed anywhere and anytime using a computer. It is relatively inexpensive compared to conventional information media such as newspapers. We can do many things by using a website, one of which is to inform about a company, also known as a company profile. The research method used is WDLC. In the testing phase, three different web browsers were used. When tested on these three browsers, there were no bugs at all.
USER SATISFACTION ANALYSIS OF GOJEK APPLICATION USING END-USER COMPUTING SATISFACTION (EUCS) Aura Wihati Dienislami; Aviarini Indrati
International Journal Science and Technology Vol. 2 No. 2 (2023): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i2.875

Abstract

At the first time, Gojek application is the online transportation services, but now it has various services. Online transportation services in the Gojek application are GoRide and GoCar. Analysis of application performance can be done to determine the user satisfaction. The aim of this research is to analyze the Gojek application user of satisfaction, especially GoRide and GoCar online transportation services. This research consists of 3 steps. The steps are making research model and adopting questionnaire, validity and realibility test and data analysis. Evaluation is done using 5 dimensions of End User Computing Satisfaction (EUCS). It consists of content, accuracy, format, easy of use and timeliness. In addition, the demographic factors of the respondents were also added, namely gender, age and occupation. There are 100 respondents in this research. The result of this research are the user satisfaction of Gojek application, especially GoRide and GoCar, can be categorized as very satisfied. The dimensions of EUCS and demographic factors have positive affect to user satisfaction. Gojek application can develop by increasing the accuracy of information and timeliness.
DELIZIA SELF SERVICE APPLICATION USING UX DESIGN AND ANDROID STUDIO Fernandus Felix Heriyanto; Hari Setiabudi Husni
International Journal Science and Technology Vol. 2 No. 2 (2023): July: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i2.893

Abstract

Delizia Self Service is a tart ordering service application using the concept of Self Service Technology (SST). In this application there are 2 kinds of prospective users, in terms of customers to order tarts who can choose directly the tarts they want and even customers can also customize tarts according to their tastes. And in terms of admin which is useful for managing products, from adding products, deleting products and modifying products. Based on its function, this application provides benefits such as providing alternative means of selling tarts, increasing sales value, increasing interest, user experience, satisfaction, and comfort of buyers when ordering tarts. This journal focuses on developing application recommendations by designing the UI/UX of the Delizia Self Service Application and realizing it using Android Studio, using the System Development Life Cycle (SDLC) method with the prototype model.
DESIGN AND BUILD WEB-BASED FREELANCE APPLICATIONS Kautsar, Daffa Sulthon; Syukriah, Fivi; Desy Kristyawati; Jamilah
International Journal Science and Technology Vol. 2 No. 3 (2023): November: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i3.986

Abstract

In today's modern era, many people have switched to looking for freelance work. One of the interesting things is freelance work because there is no work attachment to employee status, so that the person can have several jobs at one time. But until now, to find freelance work is not easy because usually many job search applications provide services only for permanent workers. For companies that are looking for freelance labor is also not easy, because freelance job search provider services are also not much. The purpose of designing this Lancer application is to make it easier for people who want to find freelance jobs. This website is designed using UML (Unified MarkUp Language). The method used in building this website uses SDLC (Software Development Life Cycle) which includes the stages of analysis, design, creation, and testing. This website is created using Laravel and MySQL frameworks.
IMPLEMENTATION OF THE RAD METHOD FOR THE GOODS SALES INFORMATION SYSTEM IN THE BINA MULIA COOPERATIVE Khaerudin, Muhammad; Hendharsetiawan, Andy Achmad
International Journal Science and Technology Vol. 2 No. 3 (2023): November: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i3.993

Abstract

In order to remain competitive, the Bina Mulia Cooperative Shop, which sells office supplies, is now working to maintain its sales turnover and boost sales. According to the findings of the observations made at this shop, there are a number of barriers to the sales business process, including the level of marketing used, which is still less effective, where product marketing in this shop is only focused on location and depends on customer arrival, and sales recording, which is still done manually using books. Based on these issues, research was conducted with the goal of developing an electronic sales system using the RAD technique and the Unifed Modeling Language (UML) as the system design. A software development methodology that focuses process development cycles quickly is called Rapid Application Development (RAD). The waterfall paradigm served as the foundation for the RAD model. The researchers discovered after testing that the sales application was powered by a computer system.
SENTIMENT ANALYSIS USING LONG TERM MEMORY (LSTM) BOOK CASE STUDY: UNSOLICITED ADVICE FOR MURDERERS BY VERA WONG'S Tri Sulistyorini; Erma Sova; Nelly Sofi; Revida Iriana Napitupulu
International Journal Science and Technology Vol. 2 No. 3 (2023): November: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i3.995

Abstract

Reading books is one of the most effective ways to reduce stress. In today's digital era, access to finding and buying books is getting easier, so reader reviews are important in choosing books that match interests. However, with a large number of reviews, Natural Language Processing (NLP) with the Long Short-Term Memory (LSTM) method is used to help analyze positive and negative sentiments from many book reviews. This sentiment analysis is useful for readers to evaluate the quality of books, as well as for authors and sellers to find out the opinions of readers and improve the quality of their work. In this study, the book review dataset "Vera Wong's Unsolicited Advice for Murderers" from the Goodreads website is used, which is then divided into training data and validation data with a ratio of 75%: 25%. The Long Short-Term Memory (LSTM) method is used to analyze the sentiment of the reviews. The model architecture built consists of Embedding Layer, LSTM Layer with 128 neuron units, 3 Dense Layer with ReLU activation function, 3 Dropout Layer, and Fully Connected Layer with and Sigmoid activation function, Binary Cross Entropy loss function, and RMSprop optimizer. The model training process was conducted with 30 epochs. The evaluation results show that the model achieved an accuracy of 90%, indicating the model performs relatively well in correctly classifying positive sentiments.
CREATIVE WEBSITE DESIGN IMPLEMENTATION FOR FOOTBALL CLUB SUPPORTERS IN INDONESIA Istini, Syalis Ibnih Melati
International Journal Science and Technology Vol. 2 No. 3 (2023): November: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i3.996

Abstract

The return of PSSI to implementing the league after the ban was lifted by FIFA, causing the public's enthusiasm for football to increase. Lots of creativity from the supporters who were present directly in the stadium which was amazing and really attractive and creative. Therefore, it is necessary to form an information media for a forum about the world of supporters in Indonesia and the results of the creativity of the supporters which are made with a web-based computer system. A website that contains information on how to dress supporters, the latest news on supporters and creativity from League I, League II and League III clubs. Making it easier for the public to get to know the various kinds of supporters in Indonesia and also see the creativity of supporters from various regions in expressing their support in the form of creative choreography. In making this website, information is obtained from reference books and internet media.Based on testing the website that has been made, it can be concluded that this Supporter Channel site has good quality for people who want to know about supporter information in Indonesia along with the diversity of creativity that exists with the website address
IMPLEMENTATION OF SIMPLE ADDITIVE WEIGHTING (SAW) METHOD FOR DESIGN AND BUILD DECISION SUPPORT SYSTEM OF LAPTOP SELECTION (Case Study: IT Store) Hariyanto Setiadi, Gregorius; Adline Twince Tobing, Fenina; Nainggolan, Rena
International Journal Science and Technology Vol. 2 No. 3 (2023): November: International Journal Science and Technology
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijst.v2i3.999

Abstract

Laptop is a small computer that is easy to carry anywhere, which makes everyone want to have one because of its convenience. However, the laptops currently available have various specifications, so users feel confused about choosing and buying the laptop they want. Therefore, this research was conducted to build a web-based decision-support system. The method used in this decision support system is simple additive weighting as a criterion for calculating laptop recommendations. The SAW method is a weighted addition method to determine the weighted sum to determine ranking. User satisfaction test results using a questionnaire using the End User Computing Satisfaction (EUCS) method The results of the calculation of the user satisfaction test obtained a result of 85.66%, which means that the system built can be useful for users in providing laptop recommendations.

Page 5 of 10 | Total Record : 93

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