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IPTEK The Journal for Technology and Science
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 08534098     EISSN : 20882033     DOI : -
Core Subject : Science,
Computer Science & IT
IPTEK The Journal for Technology and Science (eISSN: 2088-2033; Print ISSN:0853-4098), is an academic journal on the issued related to natural science and technology. The journal initially published four issues every year, i.e. February, May, August, and November. From 2014, IPTEK the Journal for Technology and Science publish three times a year, they are in April, August and December in online version.
Arjuna Subject : -
Articles 345 Documents
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Functionalization of Carbon Nanotubes as Support Material of Pt/CNTs Catalyst for Proton-Exchange Membrane Fuel Cell Purniawan, Agung; Noerochim, Lukman; Sutarsis, Sutarsis; Oktaviano, Haryo Satriya; Sukmana, Hafidz Alim; Wicaksono, Muhamad Akbar; Rachman, Berlian Aulia; Jatimurti, Wikan; Susanti, Diah; Nurdiansyah, Hanifudin; Abdul, Muhammad Fakhreza
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.16852

Abstract

The Proton Exchange Membrane Fuel Cell (PEMFC) is a type of fuel cell that converts hydrogen fuel into electrical energy. In PEMFC, platinum (Pt) supported by carbon black (CB) is frequently used as a catalyst. The catalyst has several constraints cause it to agglomerate and corrode during fuel cell operations. Carbon Nanotubes (CNTs) are a contender as a catalyst-supporting material because they offer superior properties such as hydrophobicity, conductivity, and surface area. This study used pH modifications in the synthesis process, morphology, and electrochemical performance of the Pt/CNTs catalyst to evaluate the reduced size of Pt particles and increased CNTs surface area. During the catalyst synthesis procedure, colloidal solutions with pH variations of 11 and 13 were utilized. TEM analysis showed that at pH 13, the produced Pt nanoparticles had the least average particle size of 4.2 nm, followed by 5.1 and 7.9 for pH 9 and 11, respectively. The best electrochemical performance was achieved in pH 13 samples with the largest active surface area of 40.33 m2/g, an onset potential of 0.798 V involving 4.01 electrons for the oxygen reduction reaction, and the lowest risk of deterioration.
Communication Technology Rebuilding A Better Global Civilization on Earth Sirken, Faustinus
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.19479

Abstract

The disruption of communication technology causes humans to continue to reflect on who they are and how they view the world. The more humans utilize communication technology that continues to change, the more they will examine their existence and the model of social interaction that underlies their lives, and the greater the opportunity for humans to shape communication technology in ways that improve the world situation. Humans reflect on themselves as sources of authority and meaning. Liberals with a subjectivist view emphasize the experiences that occur within humans, so humans must find within themselves the meaning of everything that happens so that they can inspire meaning for the universe. Meanwhile, Dataist with an intersubjectivity view emphasize that meaning occurs in a network of stories mutually told among many people in one world as an experience of one individual. Thus, the essence of humanism in the experience of intersubjectivity reflects humans as a source of authority and meaning occurring in a network of stories told to each other among many people worldwide. The acceleration of communication technology, especially computer algorithms, is used to read stories told by many people in one world, analyze the structure or elements of each story, and turn the stories of many people into wisdom for a better global civilization on Earth. Based on the above reasoning, this article offers a solution to efforts to rebuild global civilization on Earth with the contribution of computer algorithms. Optimally, communication technology with intelligent computer algorithms strengthens the social order, bringing global citizens closer together as one human civilization. The empowerment of communication technology through computer algorithms creates a better global civilization by implementing the values of freedom and equality for humanity. The research method uses a phenomenological methodology, while the theoretical framework uses intersubjective theory and data theory.
Investigating Design Patterns Impact on Application Performance and Complexity Rochimah, Siti; Akbar, Rizky Januar; Langsari, Kholed
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.16585

Abstract

Many studies in the literature have a premise that design patterns improve the quality of object-oriented software systems. Considerable research has been devoted to re-designing the system to improve software quality, mainly on its maintainability and reliability. Less attention has been paid to evaluating the impact of the performance efficiency quality factor. This research investigates the impact of design patterns on application performance and complexity. It is, therefore, beneficial to evaluate whether the design patterns may improve its performance and complexity or even decrease it. The research demonstrates scientific evidence in quantitative values through experimentation on a case study to present its influences. This paper uses an object-oriented enterprise project named SIA as a case study. Some issues related to design patterns are addressed. The selection of the design pattern is based on the application context issue. Three attributes related to performance efficiency are evaluated: time behavior, resource utilization, and capacity measures. The complexity is also evaluated. We use Apache JMeter and Java Mission Control as tools to support experimentation. The experiment results show that design patterns may decrease the quality of time behavior and resource utilization whilst they may increase the quality of capacity measures and complexity to a significant degree.
Management Inventory Control and Assessment of Information Systems Based on ISO 25010 Test Lestari, Arum Prayudi; Devi, Yesica Novrita; Arninputranto, Wibowo; Sari, Devina Puspita
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.19003

Abstract

A shipyard company certainly has a recording system to manage raw material inventory. The minimum-maximum stock level method analysis was used to calculate raw material inventory control. The calculation results obtained using the min-max stock level method, amounting to 14 items of fiberglass ship raw materials, were calculated, and the resin has the highest utilization value. The ending stock in 2022 for the resin is 195 liters, while the calculated safety stock is 2.08 liters. The Min-Max Stock Level method has not been implemented in the company’s raw material inventory. A website-based system is used to control the inventory system. Inventory system development is needed so that the inventory management system in the company runs effectively and efficiently. The quality of system development can be measured based on the ISO 25010 standard feasibility test. Based on three aspects of the ISO 25010 standard, the test results show the percentage results based on the functional suitability aspect of 100% for each validator, which means the percentage in the system criteria is acceptable. In the usability aspect, the percentage obtained is 92.2%, indicating that the designed system’s quality is included in the feasible criteria. In eight, the maintainability aspect of the inventory management information system is included in the easy-to-maintain category. The system assessment results based on ISO 25010 can be summarized as follows.
The Influence of e-Office Quality on Intention to Use it in Managing Maritime Documents at KSOP Utama Tanjung Perak Ramadhan, Febrianto; Yuhana, Umi Laili; Amaliah, Bilqis
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.19808

Abstract

This research discusses the intention to use e-office applications for managing maritime documents at the Tanjung Perak Harbormaster and Main Port Authority (KSOP) Office. As an application in government agencies, E-Office is very important in speeding up information, increasing performance, productivity, and ease of implementation. This research aims to determine the influence of e-office quality on intentions to use e-office technology at KSOP Utama Tanjung Perak. This method combines the Technology Acceptance Model (TAM) andWebqual techniques. TAM is used to measure users’ perceived acceptance of technology, which consists of 4 constructs: Perceived Effectiveness (PU), Attitude Toward Use (ATU), Perceived Ease of Use (PEOU), and Behavioral Intention to Use (BIU). The WebQual method for measuring the influence of quality consists of 3 dimensions: Usability, Information Quality, and Service Interaction Quality. Perceived Ease of Use (PEOU) and Usability are the most influential quality variables. The t-test results: Perceived Ease of Use influences the intention variable 3.152, Attitude Toward Use influences behavioral choices 2.723, Usability influences intention to use 3.588. This research is significant for measuring the quality of e-offices, which can also be used as a reference/ evaluation in developing e-office applications at KSOP Main Tanjung Perak.
Smart Attendance Management System Onaifo, Frank; Okandeji, Alexander Akpofure; Eluro, Alex; Owolabi, Francis
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.15241

Abstract

The research work considered the development of an attendance system using Artificial Intelligence technology. Using the Android mobile operating system developed by Google, XML, and Java programming, a smart attendance management system (SAMA) is developed for daily student attendance in colleges or schools. SAMA attempts to record attendance through face detection. Accordingly, it enhances academic performance in schools as students must attain minimum attendance requirements before they are allowed to take their examinations. It also prevents examination malpractice, such as impersonation during tests and exams. SAMA was designed and implemented using Olabisi Onabanjo University, Department of Electronic and Electrical Engineering, as a case study. Results showed that the proposed model eliminates or reduces the time wasted during manual collection of attendance, creates a student database management system that is not prone to errors or being manipulated by users, and, above all, aids in better management of classroom statistics for allocation of attendance.
Patient Segmentation Based On Customer Lifetime Value Analysis Using Recency, Frequency, Monetary And Interpurchase Time Models Shodikin, Mohamad; Fatichah, Chastine; Taniasari, Nungky
IPTEK The Journal for Technology and Science Vol 35, No 1 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i1.20162

Abstract

Hospitals strategically provide quality health services to the surrounding community. One of the strategic roles is realized in inpatient and outpatient services. Based on the background above, the author examines patient segmentation based on Customer Lifetime Value analysis using the RFMT model. The research stages include calculating the RFMT score, clustering using the K-Means and DBSCAN algorithms, and patient segmentation based on CLV analysis. The dataset in this study was obtained from inpatient and outpatient visits at a hospital from January to December 2022. The research results show four segmentations of outpatients and four inpatients based on CLV values: Champions, Loyal Customers, Potential Loyalists, and Lost Customers. Inpatient segmentation includes the Champion category, 473 (2%) patients belonging to 14 clusters (15.56%). The Loyal Customer Category is 1,727 (7%) patients who are members of 31 clusters (34.44%). The Potential Loyalist category is 3,874 (16%) patients who are members of 31 clusters (34.44%). The Lost Customer Category was 18,516 (75%) patients from 14 clusters (15.56%). Outpatient segmentation includes: Champion category, 3,512 (8%) patients belonging to 10 clusters (10.10%). The Loyal Customer Category is 5,661 (13%) patients who are members of 24 clusters (24.24%). The Potential Loyalist category is 11,070 (25%) patients who are members of 34 clusters (34.34%). In the Lost Customer Category, 23,678 (54%) patients belong to 31 clusters (31.31%).
Comparison Of KNN, Random Forest, And F-PSO Algorithms On Simple Feature Scaling for Agility Level Classification Nugroho, Tri Yulianto; Yuhana, Umi Laili; Siahaan, Daniel
IPTEK The Journal for Technology and Science Vol 35, No 3 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i3.21992

Abstract

Classifying agility levels presents challenges due to variations in team members’ personalities, roles, and undesirable behaviors. This study aims to enhance classification accuracy by comparing the performance of three algorithms: K-Nearest Neighbors (KNN), Random Forest, and Fuzzy-Particle Swarm Optimization (F-PSO) in classifying agility levels using simple feature scaling as part of the data preprocessing. Simple feature scaling is employed to ensure that all parameters are on the same scale, thereby improving the model’s effectiveness in learning classification patterns. F-PSO was selected for its ability to perform adaptive global search optimization within a fuzzy environment, while KNN and Random Forest serve as benchmarks. The study involved 160 participants from various Scrum teams to evaluate the effectiveness of these algorithms. The parameters considered included team members’ personalities (based on the Keirsey model), roles within the team, and the identification of negative behavior patterns (antipatterns). The results indicated that the F-PSO algorithm significantly outperformed KNN and Random Forest in terms of accuracy, improving from an average accuracy of 25% before optimization to 93.75% after applying F-PSO. This approach enables Scrum teams to identify and address obstacles affecting agility, facilitating earlier problem prediction and resolution, leading to more adaptive and effective teams.
Design and Implementation of Centralized Loan Origination System with Agile Development Method Sudianjaya, Nella Rosa; Yuhana, Umi Laili
IPTEK The Journal for Technology and Science Vol 35, No 2 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i2.17603

Abstract

Credit is a core business with the biggest income in the banking industry. Hundreds of customers come to the bank daily to get loan applications. Because there are a lot of customers, the loan application process can take a whole week, and some customers who can’t wait too long go and come to another bank that can provide a quick loan application process. This paper proposes an application called the Loan Origination System that can facilitate the loan application process. Loan Origination System is expected to handle the loan application process from start to finish, including credit verification, risk analysis, document management, and loan processing. Agile methodology is used in developing a Loan Origination System. Agile methodology is expected to be quick and simple and have more iterative development cycles. The proposed method has been tested using functional suitability results combined with Goal Question Metrics consisting of functional appropriateness, functional correctness, and functional suitability compliances. It gets results with 83.02%, 86.43%, and 85.96%, respectively, for functional appropriateness, functional correctness, and functional suitability compliances. The result shows that the Loan Origination System application meets the requirements and is functionally suitable. The result shows that agile methodology gives the application high flexibility and adaptability, so it is possible to make changes and adjustments in a short time. The application is suitable for helping users process and review the loan application. The application is also user-friendly and, time by time can replace the manual processing of loan applications.
Public Transport Integration Challenges of Wira Wiri Suroboyo as a Commuter Train Feeder Susanti, Anita; Supriyatno, Dadang; Dermawan, Dodik Arwin; Wibisono, R. Endro
IPTEK The Journal for Technology and Science Vol 35, No 2 (2024)
Publisher : IPTEK, DRPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v35i2.19020

Abstract

Congestion is a problem in most big cities, including Surabaya. One alternative to reduce congestion is to create city transportation with excellent service. Surabaya has had city transportation, city buses and also commuter trains for a long time. However, it is considered that travelers do not have excellent service. In 2023, a new city transportation will be created with the name Wira Wiri Suroboyo (WWS) with the aim of diverting some private vehicle users toWWS. However, until now,WWS has not been able to attract the interest of the public who use private vehicles. So it is necessary to research the operational performance of theWWS and analyze integration opportunities with commuter trains. The research method used was conducting field surveys and interviews with WWS passengers. The results of the survey show that load factor, headway, departure frequency, number of vehicles in operation are still not optimal to divert private vehicle users toWWS and at the same time integrate with commuter trains. Therefore, other efforts are needed to limit private vehicles in order to provide cross-subsidies for public transportation. So that it does not burden operational costs which have been borne by the Government.

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