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INDONESIA
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 6 Documents
 1 
Search results for , issue "Vol 33, No 1 (2022)" : 6 Documents clear
A Smart GSM-Based Home Electrical Appliances Remote Control System Elvis Tamakloe; Benjamin Kommey
IPTEK The Journal for Technology and Science Vol 33, No 1 (2022)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v33i1.12226

Abstract

Energy control systems have over the years experienced significant transformation due to technological innovations. Its importance has led to the development of a few models aimed at realizing home automation and resolving energy wastage. Wise use of electricity helps a nation to become more energy-efficient, reduces the environmental impact, saves money on the electricity bills, and keeps the nation’s electricity supply more reliable. This paper presents a prototype design to reduce the electricity wastage in Ghanaian homes and probably offices. A Global System for Mobiles (GSM) module is used for receiving short message service (SMS) from user’s mobile phone that automatically enable the controller to take any further action such as to switch ON or OFF the home electrical appliances like light, air-conditioner, fan etc. The system is activated when user sends the SMS to the microcontroller and upon receiving the SMS command, the microcontroller unit then automatically controls the home electrical appliances by switching ON or OFF the device accordingly. A system prototype was developed and tested successfully. The system provides an effective mechanism to aid the efficient utilization of power in a developing country such as Ghana
Review of In Vitro Flowering Method for Tomato (Solanum Lycopersicum L.) Siska Citra Dewi; Vincentius Riandaru Prasetyo; Johan Sukweenadhi; Fenny Irawati; Wina Dian Savitri
IPTEK The Journal for Technology and Science Vol 33, No 1 (2022)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v33i1.12459

Abstract

Tomatoes are one of the most popular vegetable plants globally because of the many benefts that can be obtained from tomatoes. However, its availability is still insuffcient for market demand. Therefore, researchers began to develop tissue culture methods to cope with market demand. Although there have been several studies on tomato flowering in vitro, information about this method is minimal and needs further development. In vitro flowering is a technique in tissue culture for flowering plants in vitro. One of the benefts is cultivating plants in a relatively short time under controlled conditions to prevent disease transmission between plants. Therefore, we conducted a literature study to compare the results of these studies to know an effective and efcient method of factors that increase the in vitro flowering plants of tomatoes. In vitro flowering methods generally focus on flowering media, especially cytokinin types such as 6-Benzylaminopurine (BAP) and kinetin, and the concentration of those hormones, also light intensity used to induce flowering of tomato plants. Factors that affect in vitro flowering of tomato plants are tomato plant varieties, hormones, and light intensity.
Optimization of Access Point Positioning on Wi-Fi Networks Using the K-Means Clustering Method Faiz Ainun Karima; Ary Mazharuddin Shiddiqi
IPTEK The Journal for Technology and Science Vol 33, No 1 (2022)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v33i1.12402

Abstract

Uneven distribution is a common problem in setting up access points where some areas have many signals colliding with each other and others have no signals at all (blank spots). As a result, proper access point positioning on the WI-FI network is required to optimize the number of access points used and the signal strength received while maintaining the same coverage area's functionality. In this study, signal strength measurement is used to obtain the estimated distance using the Received Signal Strength Indicator (RSSI) method. The server analyzes using the K-Means Clustering algorithm to cluster the observation area. The output of this classification is the mapping of dense regions (traffic) and loose regions to determine the coverage areas of each access point. This approach aims to optimize the placement of access points in terms of their number and specifications.
Adaptive Assessment and Guessing Detection Implementation Akbar Noto Ponco Bimantoro; Umi Laili Yuhana
IPTEK The Journal for Technology and Science Vol 33, No 1 (2022)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v33i1.12027

Abstract

Computerized adaptive testing (CAT) is a context-based adaptive assessment. However, the assessment result may not be valid because the examinee might cheat or guess the answers. Although there are many guessing detection methods, there are not many discussions about their implementation into CAT. Therefore, this paper presents an example of a modification of an existing software so the newly modified software can detect guessed answers and be able to select questions adaptively. The system can detect assuming behavior by recording the examinee’s answer time. Also, the designed system can like questions adaptively by connecting Fuzzy logic, which calculates what level the question should select for the next iteration. The system is responded well by elementary and college students. A total of 56.6% felt the system was straightforward to use. The detection methods can detect guessing behavior of about 73%. However, the system’s sensitivity is low if the method is forced to classify answers which answered in a long response time / general guessing. Nevertheless, when we limit the data classified within 10s response time (rapid-guessing), the method’s sensitivity rises to 68.78%.
A Systematic Literature Review on Progressive Web Application Practice and Challenges Reza Fauzan; Ice Krisnahati; Bima Dinda Nurwibowo; Della Aulia Wibowo
IPTEK The Journal for Technology and Science Vol 33, No 1 (2022)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v33i1.13904

Abstract

This research aims to establish a knowledge of Progressive Web Application (PWA) method practices based on published empirical investigation, the problems that the PWA method may face, and the PWA method's approach to experimental studies. We also looked for PWA practices that might address the issues with the prior method. We performed a broad, automated search to find SLRs and 43 papers published from 1 January 2015 to 6 November 2021 that discuss PWA. Specific inclusion and exclusion criteria were applied to determine which relevant studies we used for our research purposes. The review identified 31 practices of PWA, Six challenges of the previous approach of mobile application development that get resolved by PWA, and seven challenges posed by the practice of PWA. PWA was introduced in 2015, and since 2017 the studies on PWA topics have started increasing. The distribution of studies based on nations is spread evenly. 74\% of selected studies are about the practice of the PWA. Although it cannot be generalized that the PWA approach handles the challenge of the previous method, some studies reported that PWA covers the problems of the previous methods. However, despite its benefits, PWA still has some challenges, mostly related to browser support.
A Biodiesel Production Technology from Used Cooking Oil: A Review Erwan Adi Saputro; Ahmad Rizaldi; Tahan Simamora; Nove Kartika Erliyanti; Rachmad Yogaswara
IPTEK The Journal for Technology and Science Vol 33, No 1 (2022)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v33i1.11729

Abstract

Used cooking oil is widely considered waste because it can damage the environment and cause health problems. Meanwhile, used cooking oil can be used as a substitute raw material for Crude Palm Oil (CPO) in Indonesia's national biodiesel program. Indonesia has a remarkable ability to use used cooking oil as a raw material for making biodiesel. If the 1.2 million kiloliters of biodiesel made from CPO raw materials are exchanged with used cooking oil raw materials, it can save approximately Rp. 4.2 trillion. There are various process technologies in making biodiesel, including microemulsion, pyrolysis, and transesterification. Transesterification is a process in which triglycerides and methanol are reacted to create biodiesel and glycerol as a by-product. Transesterification using a homogeneous catalyst has advantages such as lower cost, relatively short processing time, and higher yield of biodiesel products. Transesterification using a homogeneous catalyst has the disadvantage of a more complex separation. This literature study aims to explain the method for biodiesel production and becomes a reference in terms of process selection in biodiesel manufacturing plants, especially from used cooking oil as raw material.

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