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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 6 Documents
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Search results for , issue "Vol 16 No 1 (2022): Simetris" : 6 Documents clear
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.
Sistem Informasi Kegiatan Kuliah Kerja Lapangan (KKL) di Sekolah Tinggi Teknologi Ronggolawe (STTR) Cepu Menggunakan Desain Unified Modeling Language (UML) Muksan SAN Junaidi
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.v16i1.273

Abstract

KKL is an academic activity that must be taken and taken by all Diploma and Bachelor students in groups or individually. At the STTR Cepu campus, the process of submitting KKL to the assessment is still done manually, so it takes quite a long time to search for student data, missing data and inconsistent KKL activity data. The purpose of this research is to design and develop an Information System for Online KKL Activities at the STTR Cepu campus. Using the waterfall model system development life cycle (SDLC) development method, design based on Unified Modeling Language (UML) and PHP programming language with MySQL database. The research data includes student MPA data for the last 3 years 2015-2018. The results of this study are the application of an KKL activity information system that helps make it easier for students in the process of registering activities, submitting activities and proposing guidance processes and reports on the results of KKL activities as well as being more time efficient and faster..
Simulasi Kavitasi Pada Venturi Dengan Menggunakan CFD (Computational Fluid Dynamics) Mudjijanto Mudjijanto
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.v16i1.320

Abstract

In the piping installation system, the phenomenon of cavitation is often overlooked, while cavitation itself is one of the disadvantages in the piping installation system. For this reason, we conducted a study on the cavitation phenomenon in venturi using Fluent 6.3 software. The fluid pressure entering the venturi comes from pumps that are arranged singly, in series and parallel. For the pressure generated from the pump arrangement as follows single pump 5 psi, 6 psi in series and 11 psi in parallel. The first is to collect data, model on gambit, carry out the meshing process, determine the boundary conditions and run the Fluent 6.3 3D solver. From the simulation, we can see the flow pattern from the characteristics of pressure, velocity, direction, pressure trajectory, and flow velocity trajectory. Cavitation occurs at the venturi neck and turbulent flow occurs at the outlet of the venturi

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