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STRING (Satuan Tulisan Riset dan Inovasi Teknologi)

STRING
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Published by Universitas Indraprasta PGRI

ISSN : 25279661 EISSN : 25492837 DOI : http://dx.doi.org/10.30998/string.v4i3.6197

Core Subject : Science, Education,

Computer Science & IT Mathematics

STRING (Satuan Tulisan Riset dan Inovasi Teknologi) focuses on the publication of the results of scientific research related to the science and technology. STRING publishes scholarly articles in Science and Technology Focus and Scope Covering: 1. Computing and Informatics 2. Industrial Engineering 3. Electrical Engineering 3. Mechanical Engineering 4. Applied Mathematical 5. Physics (Classical and modern) 6. Mathematics and Science

Arjuna Subject : Ilmu Komputer (semua kategori) - Teori Komputasi dan Matematika

Articles 373 Documents

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Analisis Peningkatan hybrid Cryptosystem Untuk Enkripsi dan Dekripsi Menggunakan Vigenere Cipher dan RSA Pada Text Alfian Yunianto Suseno; Nina Sulistiyowati; Purwantoro -
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 2 (2021)
Publisher : Universitas Indraprasta PGRI Jakarta

Ilmu kriptografi merupakan suatu teknik matematis yang berhubungan dengan aspek keamanan. Ilmu kriptografi memiliki dua jenis teknik yang memiliki kelebihan dan kekurangannya sendiri. Untuk mengatasi masing-masing kekurangan kedua teknik tersebut dapat digunakan metodologi hybrid cryptosystem. Metodologi hybrid cryptosystem adalah sebuah metode untuk mengamankan suatu file atau informasi dengan menggunakan kombinasi antara algoritma simetris dan asimetris. Dengan penggabungan kedua teknik tersebut maka didapat sebuah algoritma yang kuat dan saling menutupi kekurangannya masing-masing. Tahapan yang dilakukan dalam penelitian ini adalah melakukan pembangkitan token acak dengan menggunakan pseudorandom number generator, lalu dengan token acak tersebut akan dilakukan pembangkitan tabel dan key acak, kemudian plaintext dienkripsi menggunakan tabel dan key acak tersebut, sedangkan token yang digunakan akan dienkripsi dengan RSA. Hasil penelitian yang ditampilkan adalah hasil analisa dari penelitian ini yaitu peningkatan varian bentuk ciphertext yang dihasilkan dan kemudahan dalam pembacaan hasil dekripsi karena penggunaan printable ASCII dalam proses enkripsi, dan hasil token yang dienkripsi memiliki panjang yang lebih pendek dan berbentuk hexadesimal.

Perancangan Perangkat Lunak Perhitungan Biomekanik dengan Microsoft Visual Basic 6.0 Maesa Alif Badra Fataya; Tiara Tiara; Surya Perdana
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

Practicum Design of Industrial Engineering (DIE) I was one of the existing courses in Industrial Engineering University X. One of which is discussed in DIE I is Biomechanics. Biomechanics is one branch of ergonomics that discussed about body mechanics for doing a job. In practicum of DIE I included in biomechanics is the Recommended Weight Limit (RWL), Lifting Index (LI), Rapid Upper Limb Assessment (RULA), and Rapid Entire Body Assessment (REBA). During this time, the calculation method of RWL, LI, RULA, and REBA on practicum DIE I still manually which causes the calculation becomes longer further practicum be delayed. This research aims to make the Software of calculation biomechanics by using Microsoft Visual Basic 6.0. Software that is made just for calculating RWL, LI, RULA and REBA. Based on testing by respondents as many as 21 people found the average time of manual calculation and software calculation. In completing the calculation, manual calculation takes an average of 297.246 seconds, while calculation with Software takes an average of 32.584 seconds. So that with the completion of the software, the calculation of biomechanics can be quickly resolved.

ANALYSIS QUALITY CONTROL OF PRODUCT DEGAN SK 150 ML USING STATISTICAL QUALITY CONTROL (SQC) AT PT PRIMA KEMASINDO Widyananda Fitrianoer Insani; Fahriza Nurul Azizah
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

Products Degan SK 150 ml is a beverage product that is most in demand by consumers and is a coconut juice drink or nata. PT Prima Kemasindo always strives to maintain the quality of its products, especially the Degan SK 150 ml product. However, there are still products that do not meet the standards set by the company. This is because the company has not used a definite method to monitor the control limits for the level of product damage. Thus, this study aims to determine the limits of damage control and the level of damage that occurs, the factors that cause product damage and its consequences, as well as suggestions that can be given to improve product quality. The research method used is Statistical Quality Control (SQC) with p-chart, pareto diagrams, and fishbone diagrams. The result showed that the level of damage of Degan SK 150 ml product was beyond the control limit and there were five types of damage that often occurred during the January-March 2021 period caused by human factors, methods, and machines. Thus, there are seven proposed improvements given to the company in order to reduce the level of product damage.

Implementasi Algoritma K-Means untuk Menganalisa Pemain Video Game Mobile Legend untuk Mengetahui Tipe Hero dan Role yang Sering Digunakan pada Setiap Kalangan Laras Elza Devila; Saifur Rohman Cholil; Raffi Danendra Athallah; Ahmad Arrio Irawan
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

Video games are one of the technologies in the entertainment field that are growing rapidly in the community. Even Esports (video game competitions) are increasingly recognized by the industry as a recreational sport. An example of an esport that is currently popular among people is Mobile Legends. Both Android and IOS smartphones can run the Mobile Legends video game application. However, no one has ever discussed using the developer's built-in Role-playing as an alternative hero to simplify the Role-playing combination guide in the game, grouping characters according to their characteristics, and using characters according to the player's wishes. For this reason, this study uses the k-means algorithm to compile the grouping of heroes and Role-playing in the Mobile Legend video game. From the results of the research conducted, there are three groups of heroes that have similar characteristics, namely Mage, Marksman, and Fighter. The K-Means algorithm used can help determine the order of hero launches. Based on the results of clustering testing using the K-Means method, data in cluster 1 was obtained with an average accuracy of 5% hero support; heroes Tanks 10%; Fighter heroes 20%; hero Mage 25%; hero Assassin 20%; Marksman heroes 20%; then for the average age of 25.1 ; win rate 67.3; total matches 5863.4 and total MVP 1664,1. Players with hero support, tank, fighter and mage types have Roles as supporting tools to develop a core Role or Marksman and assassin heroes who have high capabilities as winners in the team, with an average user who has a supporting Role of 0.15 and an average user with 0.2 . Role core

Proses Upgrade Komunikasi Distributed Control System dari Remote Input/Output ke Network Input/Output Fitria Hidayanti; Fitri Rahmah; Dimas Sigit Priyatna; Ardiyanti Aulia
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

The use of control systems for industrial automation is currently achieving rapid movements, one of which is the Distributed Control System (DCS). DCS has several generations in terms of software and hardware. This research discusses DCS upgrades in terms of hardware. Upgrading DCS from Remote Input/Output (R I/O) to Network Input/Output (N I/O) has two stages, upgrade software and hardware upgrading run simultaneously. CS 3000 is still integrated with Windows 7, which is software from R I/O, while to keep up with the development of Windows technology, 10 R I/O cannot reach it. For N I/O itself, it uses Centum VP software that is integrated with Windows 10. R I/O is limited to using RJ45 cable, which has a range of tens of meters, so it must use a repeater to connect long-distance communication. While, in communication between Marshalling Cabinets with field instruments, fibre optics can reach 5 km, save costs, transfer data faster, and only need one connecting cable.

Usulan Perbaikan Pengendalian Persediaan Spare Part Utama Gondola Menggunakan Metode EOQ dan Min-Max Santika Sari; Ajeng Puspita Sari; Annisa Putriana Saputro; Nurfajriah Nurfajriah
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

PT. Pola Gondola Adiperkasa is a company engaged in construction, whose main activities are gondola maintenance and gondola installation. According to an interview conducted with PT. Pola Gondola Adiperkasa, it is known that this company has problems in unstructured inventory. If the gondola spare part inventory is stored for a long time then the problem that occurs is the reduced quality of the goods. This causes the inventory cost to increase. The purpose of this study is to determine the calculation of the Economic Order Quantity (EOQ) method, to know the calculation of the Min-Max method and to propose improvements regarding inventory control. The results of calculations using the Economic Order Quantity (EOQ) method were found to be more efficient in terms of controlling the gondola spare part inventory compared to PT. Pola Gondola Adiperkasa and Min-Max method. The difference between the policies of PT. Pola Gondola Adiperkasa with Economic Order Quantity (EOQ) method is Rp. 384,787, while the difference between the policies of PT. Pola Gondola Adiperkasa with the Min-Max method is Rp.268.931. Researchers propose to PT. Pola Gondola Adiperkasa to use the Economic Order Quantity method.

Perbandingan Akurasi Pengukuran Sensor LM35 dan Sensor DHT11 untuk Monitoring Suhu Berbasis Internet of Things Sirojul Hadi; Radimas Putra Muhammad Davi Labib; Parama Diptya Widayaka
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

Temperature is an object of research that is often studied. Research on temperature is within the scope of control and monitoring. The process of controlling and monitoring temperature is influenced by the selection of the right temperature sensor. The temperature sensors that are often used are the LM35 sensor and the DHT11 sensor. The LM35 sensor has advantages in terms of a simple design and easy to implement, while the DHT11 sensor has the advantage because in one sensor package there are two functions, namely to measure air temperature and humidity. In this study, temperature measurement accuracy was carried out to facilitate researchers in determining the right temperature sensor. The data monitoring method uses the internet of things (IoT). The results of the research show that the DHT11 temperature sensor is more accurate and more stable than the LM35 temperature sensor. The results of the sensor test at room temperature, the DHT11 sensor has an accuracy rate of 97.21% while the LM35 sensor has an accuracy rate of 96.86%. While the results of the sensor test in the server room, the DHT11 sensor has an accuracy rate of 95.26%, while the LM35 sensor has an accuracy rate of 90.32%.

Black Box Testing pada Aplikasi Pencatatan Peminjaman Buku Menggunakan Boundary Value Analysis Eno Hakimah Kusuma Dewi; Ilyas Shiddiq Pratama; Audy Sukma Putera; Carudin Carudin
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

The book borrowing recording application can record activities related to borrowing books in the library, such as recording a track record of borrowing a book. However, applications that have been made in such a way need to go through a test flow to find out how far the performance and quality of the application itself is. Therefore, it is necessary to have a test to find out how the quality is. So, the purpose of this research is to carry out a testing on the book lending recording application to identify whether the application is in accordance with user needs or not. The test, which is one of the stages of the Software Development Life Cycle (SDLC) methodology carried out on this book lending recording application, applies Black Box Testing with the Boundary Value Analysis method which focuses on aspects of input validation, observing input content, and input results. The test results show that in the book borrowing recording system, discrepancies were found in the input process in the loan registration feature and book borrowing form so that it needed to be corrected before being used by the user.

Optimalisasi Biaya Distribusi Produk dengan Menggunakan Vogel's Approximation Method di PT. LF Beauty Manufacturing Elfitria Wiratmani; Ilham Falani; Siti Humayro Billah; Anton Oktavianto; Hoesup Pamoajer; Syaefudin Akbar
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

The distribution of products from a company to consumers is very important. This greatly affects the level of consumer satisfaction, and will have a huge impact on the company. Problems often occur in product delivery where the costs incurred by the company are not optimal. The method used in this study is to implement Vogel's Approximation Method (VAM) with the aim of optimizing product distribution costs so as to produce minimum costs. Based on the results of this study, it was found that the distribution costs of the product were more optimal than the distribution costs of the previous company

Implementasi Lean Manufacturing untuk Mengurangi Waste pada Produksi Pivot Piece (Studi Kasus PT. Tri Jaya Teknik Karawang) Muthia Elsa Farida; Fahriza Nurul Azizah; Hamdani Hamdani
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

PT Tri Jaya Teknik Karawang is one of the manufacturing companies engaged in the production of vehicle parts, because its main product is pivot piece. As for other forms of products produced by this company, such as Gongsol and Fuji Seat. This product research at PT Tri Jaya Teknik Karawang will be carried out on one type of Piece Pivot product, because this product is the company's main product, whose regular demand every month is always there and the amount is uncertain. This company has waste in the production line, namely the existence of product defects and lead times. This study aims to determine the types of waste and what factors occur in the production of pivot pieces at PT. Tri Jaya Engineering Karawang. By using the Lean Manufacturing method which begins with creating a Value Stream Mapping (VSM) then performs an analysis using the Failure Mode and Effects Analysis (FMEA) method. It is known that in the production of pivot pieces there are 3 types of waste identified, namely waiting time, unnecessary waste of inventory, and product defects. Proposed improvements to minimize waste in the production of pivot pieces are to carry out regular machine maintenance, create a production flow and provide warnings and evaluations of the performance of production operators.

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Yuni Wibawanti

Contact Email
stringinformatika@gmail.com

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+6281617239740

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stringinformatika@gmail.com

Editorial Address
Prodi Teknik Informatika FTIK Universitas Indraprasta PGRI Jl. Raya Tengah Kelurahan Gedong , Pasar Rebo, Jakarta Timur

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA

Abstract

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Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Yuni Wibawanti

Contact Email stringinformatika@gmail.com

Phone +6281617239740

Journal Mail Official stringinformatika@gmail.com

Editorial Address Prodi Teknik Informatika FTIK Universitas Indraprasta PGRI Jl. Raya Tengah Kelurahan Gedong , Pasar Rebo, Jakarta Timur

Location Kota adm. jakarta selatan, Dki jakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Yuni Wibawanti

Contact Email
stringinformatika@gmail.com

Phone
+6281617239740

Journal Mail Official
stringinformatika@gmail.com

Editorial Address
Prodi Teknik Informatika FTIK Universitas Indraprasta PGRI Jl. Raya Tengah Kelurahan Gedong , Pasar Rebo, Jakarta Timur

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA