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Helmi Gunawan
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Simetris
Published by Sekolah Tinggi Teknologi Ronggolawe Cepu
ISSN : 16937066     EISSN : 2686312X     DOI : https://doi.org/10.51901/simetris.v14i2.124
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering
SIMETRIS: The Journal of Technology and Applied Science is a scientific journal published regularly every six months, namely June and December. SIMETRIS: Journal of Technology and Science Accepts articles from various groups covering the study and application of theory, research results, interesting conceptual ideas in the fields of engineering and applied science. The editorial team will decide on the selection of articles to be published after receiving the results from the expert editing team. Authors will be given input from the expert editing team. SIMETRIS: Journal of Technology and Applied Science contains research articles or literature studies in Indonesian and English.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 176 Documents
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Analisis Keamanan Aplikasi Android Non Playstore Dengan Metode Digital Forensik Pendekatan Statis Dan Dinamis Indra Gunawan
SIMETRIS Vol 15 No 2 (2021): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v15i2.225

Abstract

The crime of cyberspace every year has increased, one of which is a data leak. The non-playstore Android application is not guaranteed its security because the application system only has access to special directories, and this is what complicates the installation process of non-playstore application users. In this study the author conducted a security analysis with 5 non-playstore applications with a static and dynamic approach, after experimenting using Wireshark and Network Miner software with the process of the process of the method of the method of the National Institute of Justice (NIJ) which was divided into five stages, namely identification, collection, collection, Collection Examination, Analysis, and Reporting have received evidence that the non-playstore application is suspected not guarantee user data security. In this monitored application which will later obtain digital proof of safe or whether or not Android applications from the threat level of crime by using a static method to dismantle the application and dynamic programs used to see the data security exposed whether there is a virus in the application and other data leaks. From this analysis it can be obtained by experimental results using Sofwere Wireshark and Network Miner to be analyzed. This study aims to analyze the vulnerability level of applications sourced from non-playstore with a threat level. The results obtained from the 5 applications are monitored, it is known that the MICHAT Lite and BIGO LIVE application has an extreme risk with 45% points, on the Rolling Scroll application, Flying Sketchboard is known to high risk high risk with 25% point, while the Car Engine crash application has a security level Moderate risk with a risk that is 20%. The conclusion of this study is that applications installed from third parties have a higher level of threat when compared to the official application on the Playstore
Jurnal Review: Analisis Modifikasi Komposisi Substrat Limbah Cair Tahu Pada Pembuatan Biogas Menggunakan Metode Anaerob Puput Eka Suryani
SIMETRIS Vol 16 No 1 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i1.232

Abstract

Based on data from the Central Statistics Agency, the average consumption of tofu per capita continues to increase. The annual production is estimated to reach more than 2.56 million tons every year from the total tofu industry of 84 thousand. The abundance of tofu liquid waste can be used as raw material for biogas production. Biogas is an efficient method that can be used as two alternatives at once, namely to prevent environmental pollution as well as an effort to create new and renewable energy. The main objective in this analysis is to find the ideal composition for tofu wastewater treatment using the anaerobic digestion method, in order to obtain optimum biogas production. In analyzing the level of effectiveness of the modification of the mixing of tofu waste raw materials with several other materials, normal condition data is used which is used as reference data in determining whether the modified conditions are more effective or not more effective in terms of the volume of biogas produced. There are 9 samples that use volume data as a comparison of data from one sample to another. Under normal conditions without modification, tofu liquid waste with a slurry volume of 75 L can produce a biogas volume of 4.36 L with a resulting pressure of 0.12 kg/m2. From some of the data compared, the raw materials from tofu liquid waste are added with cow dung, vinasse, rumen, and yeast waste. Based on the comparison of the results of biogas produced, it can be said that the addition of cow rumen is more effective than other modifications because it increases biogas productivity by approximately 26%, and with the addition of cow rumen it can increase productivity by approximately 41%.
SPK Penerima Bantuan Rumah Tidak Layak Huni (RTLH) Menggunakan Simple Additive Weighting (SAW) di Desa Nglungger Adhika Pramita Widyassari
SIMETRIS Vol 16 No 1 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i1.233

Abstract

Housing assistance unfit for habitation is one of the government programs to overcome the poverty rate in Indonesia, however, the problem is that the process carried out by the Kelurahan is still carried out subjectively by only considering the survey results. Therefore, the kelurahan requires a decision support system so that the selection can be carried out systemically efficiently. The Multiple Attribute Decision Making method provides answers to all these problems. From several Multiple Attribute Decission Making methods, Simple Addictive Weighting is chosen to be applied to the decision support system. Purpose This decision support system is made so that the kelurahan can distribute assistance to those entitled to receive it, so that with a web-based decision support system to select recipients of uninhabitable housing assistance is appropriate and objective. This study provides fairly accurate results where the distribution process is right on target with data obtained from the kelurahan. The system created is enough to help the urban village with the results of functional tests using black box tables to get 100% results and a low error value, namely MSE of 0.000406667.
Penerapan Algoritma Apriori Untuk Menemukan Pola Peminjaman Buku Di Perpustakaan (Studi Kasus: Sekolah Menengah Atas Negeri 2 Cepu) Retno Wahyusari
SIMETRIS Vol 16 No 1 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i1.236

Abstract

The library is a means of providing information, sources of knowledge and means of supporting teaching and learning activities for users to obtain the desired information. Cepu Public High School 2 library has a collection of books ranging from subject books to other types of books around 600 copies. More than 280 new students with all students ranging from 10th to 12th grade around 750 students, therefore with this increase in number of students the library is also required to increase its book collection to support the activities of its students. Cepu Public High School 2 library is more than 10 visitors per visit, one of the activities in the library is borrowing books. Every year the library staff reports on books that have been borrowed by students, about 100 books lending transactions per year. The average student in publishing more than one book, they buy books based on the relevance of the subject matter. Students in the search for books that have a connection takes quite a long time, this is related to the placement of books that are not based on the relevance of the textbook. Linkages between books can be identified by gathering information by collecting lending data sets. Extracting the linkage information between book items is known as the association rule method. The rule association method in this study uses the Apriori algorithm to provide book placement recommendations. Apriori algortiam selection because Apriori algorithm is the most established algorithm in the rules of association. The results of the research conducted resulted in 3 rules of association rules with a minimum support value of 20% with a minimum trust value of 50% and 70% obtained the highest value of the confidence of 78% and 47% support if using books 500-599 books will be purchased 300-499.
Hasil Belajar Fisika Melalui Pembelajaran Daring Ratna Dwi Rahayu
SIMETRIS Vol 16 No 1 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i1.239

Abstract

The online learning paradigm becomes an alternative at every level of education today. This study aimed to describe students' physics learning outcomes through online learning. The study, which involved 47 students Sekolah Tinggi Teknologi Ronggolawe Cepu Departmen of Mechanical Engineering Semester 1 , used observation sheet to collect data related to the online learning. Besides, the documentation of students' physics learning outcomes scores was collected to be analyzed by using descriptive statistics. The results of this study indicated that the average score of students’ physics learning outcomes through online learning was in Very Good category. Another finding from this study was that there were still 11% of students who needed physics tutoring. Thus, further research could explore the factors that hindered students' current understanding of physics learning.
The Effectiveness of Repetition in Increasing Students Vocabulary Helmi Gunawan
SIMETRIS Vol 14 No 2 (2020): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v14i2.250

Abstract

There are 2 problems that motivated the researchers to conduct this research. The first problems arises from internal and the second comes from external problems related to the weakness of engineering students in mastering English vocabulary. This study is intended to provide reinforcement to students on English vocabulary so that their English language skills increase. Through the repetition method, students are more likely to repeat and practice correct spelling when pronouncing English words. In addition, the ability to concoct sentences can also be trained with this method. The data in the form of field notes and questionnaire results show that with repetition students are able to increase English vocabulary accompanied by an increase in creating sentences.
The Effectiveness of Teaching English Vocabulary Using Dictionary Online Media in STTR Cepu in Academic Year of 2020-2021 Helmi Gunawan
SIMETRIS Vol 15 No 1 (2021): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v15i1.253

Abstract

The Covid-19 pandemic, apart from providing a bad experience, can also make someone challenged and offer to develop learning but in Engineering English lectures. At first the learning was carried out face-to-face, this time it was carried out boldly. Vocabulary is a basic and important knowledge in Mastering English. One of the vocabulary learning strategies during the pandemic is through online media. This research was conducted in order to determine the effectiveness of vocabulary learning by using an online dictionary for Mechanical Engineering Students STTR Cepu. This study used a descriptive approach. There are 30 students as respondents. Based on the questionnaire and strongly agree by 43.3%, agree by 46.7% say disagree and strongly agree. So that it can be said that the effectiveness of learning vocabulary using online dictionaries is weak in mechanical engineering students at STTR Cepu.
PERAMALAN KONSUMSI ENERGI LISTRIK DIKABUPATEN BLORA PADA TAHUN 2022-2025 MENGGUNAKAN METODE AUTOREGRESSIVE INTEGRATED MOVING AVERAGE (ARIMA) Wiwik Prasasti
SIMETRIS Vol 16 No 2 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i2.247

Abstract

Listrik merupakan salah satu kebutuhan dasar yang sangat penting dalam kegiatan perindustrian, perumahan, dan aktivitas kehidupan sehari-hari terutama dalam bidang perkembangan teknologi. Seiring bertambahnya penduduk dan pertumbuhan persektor di Kabupaten Blora yang semakin meningkat maka dibutuhkan penyediaan dan penyaluran tenaga listrik yang memadai baik dari segi teknis maupun dari segi ekonominya. Prediksi atau Peramalan berarti kegiatan Peramalan apa yang terjadi pada masa mendatang berdasarkan data yang relevan pada masa lalu dan Peramalan kemasa yang akan datang dengan suatu bentuk model yang sistematis. Untuk melakukan peramalan konsumsi energi listrik 4 tahun mendatang maka di perlukan data input dari tahun 2015-2021 menggunakan metode Autoregressive Integrated Moving Average (ARIMA) dengan perangkat lunak wolfram mathematica yang diolah melalui Raspberry Pi. Metode tersebut mengacu pada kebutuhan energi listrik 4 sektor yaitu sektor sosial, rumah tangga, bisnis, dan industri. Hasil peramalan konsumsi energi listrik di Kabupaten Blora pada Sektor Sosial, Sektor Rumah Tangga, Sektor Bisnis, dan Sektor Industri semakin meningkat dari tahun 2022-2025 yang memiliki laju pertumbuhan 4,55% berdasarkan energi terjual, 4,86% berdasarkan daya tersambung, dan 2,77% berdasarkan jumlah pelanggan yang di layani PT.PLN Kabupaten Blora. Hasil peramalan tersebut menggunakan metode ARIMA dengan perangkat lunak Wolfram Mathematica yang diolah melalui Raspberry Pi.
PERANCANGAN MESIN SHREDDER LIMBAH BOTOL PLASTIK MENGGUNAKAN SENSOR PROXIMITY BERBASIS ARDUINO Joko Waluyo
SIMETRIS Vol 16 No 2 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i2.251

Abstract

Abstract The design of this plastic chopping machine is to deal with plastic bottle waste in terminals, stations, airports, bus stops, and hotels. This machine serves to cut plastic bottle waste to a certain size so that the waste can be easily stored so that the waste does not pollute the environment. The machine is designed with an automation system using the Arduino UNO program to facilitate its operation. The purpose of this design is to design a plastic bottle shredder with a capacity of 4000 grams/minute including the design of the shaft diameter, power, gear ratio used and determine the program and sensors used. The method used is technical analysis to determine the load on the shaft so that the specifications of the shaft, motor power can be determined, for the automation system an Arduino-based system is chosen using supporting devices such as relays, and stepdown adapter modules. The results of the engineering design of the plastic chopping machine produced the following machine specifications: 1.5 HP electric motor (220 volts, 1400 rpm), shaft diameter of 30 mm. bearing type 6006 with a life of 2,480,000 hours. Photoelectric type proximity sensor, E3-ZB sensor which features IP67 waterproof capability, with Arduino Uno type. The device supporting this automation system uses the LM2596 Stepdown Module, 30A n Relay Module and a 12v adapter, 220v Pilot Lamp. Keywords: chopping machine, arduino program, automation system, plastic bottle, design
Systematic Literature Review: Implementasi Metode Statis Dan Dinamis Pada Analisa Malware Deni Prayitno
SIMETRIS Vol 16 No 2 (2022): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v16i2.255

Abstract

Perkembangan teknologi yang terus menerus menciptakan peluang untuk kejahatan dunia maya menggunakan Internet. Salah satu jenis kejahatan dunia maya yang dapat merugikan individu atau bisnis adalah serangan malware. Malware adalah perangkat lunak yang sengaja dirancang untuk mencuri data, memanipulasinya, dan mendapatkan akses penuh ke server yang terinfeksi. Salah satu malware yang dapat menyusup ke komputer pengguna secara diam-diam dan jarak jauh adalah malware Poison Ivy, yang dikenal sebagai "Remote Acces Trojan" karena dapat mengambil kendali penuh melalui pintu belakang. Dalam proyek ini, malware Poison Ivy akan dianalisis untuk mengetahui cara kerja malware Poison Ivy. Analisis dilakukan dengan menggunakan metode analisis statis dan dinamis, bahwa kombinasi dari metode ini adalah kombinasi yang tepat untuk menganalisis aktivitas malware. Berdasarkan analisis metode kerja malware Poison Ivy, dapat disimpulkan bahwa jika ada beberapa signature, nama file dan string yang telah diperiksa, sebenarnya dapat melakukan proses remote login tanpa terdeteksi oleh pemilik.

Page 10 of 18 | Total Record : 176

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