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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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SISTEM KEAMANAN PELACAKAN KENDARAAN BERMOTOR MENGGUNAKAN RASPBERRY PI 3 DENGAN MODULE GPS SECARA REALTIME BERBASIS WEB Muksan SAN Junaidi
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.v14i2.133

Abstract

Motor vehicle theft is a criminal problem that very often occurs in the community. Along with the development of technology and the level of demand for motor vehicle safety in the community that begins to increase. One of the devices that has been developed is Internet of Things (IoT) technology which is able to connect and facilitate the communication process between machines, devices and humans via the internet network. The purpose of this research is to develop a monitoring application that utilizes IoT technology as a medium for tracking the location of motorized vehicles. This research consists of 3 main system components, including the End Device System found on the Raspberry Pi device, Web Service (Back-End System) as a service for data transfer, and Front-End System user interface in the form of a website application. This system has several main features, including realtime tracking and is equipped with an activity log which can be used to determine the identity of the vehicle user. Users can access these features through the application from the website. Based on the trials conducted, this system works well on motorized vehicles, however, this system has more dependence on the internet network available in each region.
Optimasi Model Artificial Neural Network untuk Klasifikasi Paket Jaringan Indra 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.v14i2.135

Abstract

Klasifikasi jaringan internet dibutuhkan secara luas oleh berbagai pihak untuk penghematan, pengalokasian, pembatasan sumber daya internet. Berbagai teknik digunakan untuk hal tersebut, salah satunya adalah dengan pendekatan machine learning khususnya algoritma jaringan syaraf tiruan (artificial neural network) yang selanjutnya disingkat ANN. ANN bekerja dengan cara meniru cara kerja syaraf otak manusia. AAN pada penelitian ini digunakan untuk mengklasifikasikan paket jaringan. Dataset yang digunakan adalah terdiri dari 990.558 baris data, 4 kolom input(X) meliputi protocol, port, timestamp, packet length. Kolom output(Y) terdiri satu kolom 5 label (App, Sosmed, Game, Browsing, Streaming). Selanjutnya dataset ini dibagi menjadi 3 yaitu training, test, dan validation. Tujuan dari penelitian ini adalah, pertama, untuk mengetahui kemampuan algoritma ANN untuk pengklasifikasian paket berdasarkan per satu paket. Kedua, menemukan model ANN yang paling optimal untuk permasalahan diatas. Kesimpulan yang didapatkan adalah Algoritma neural network dapat digunakan pada klasifikasi paket jaringan, tetapi jika dataset yang digunakan memiliki karakteristik-karakteristik seperti jumlah variabel X kecil, data pada variabel X sangat lebar jaraknya seperti (port, packet size, time to previous packet, protocol) maka akurasi tinggi sulit untuk didapatkan. Kedua, jika permasalahan yang diselesaikan memiliki kemiripan dengan penelitian ini, maka arsitektur model ANN yang paling optimal adalah: jumlah neuron input layer adalah 7 kali jumlah variabel X, jumlah neuron hidden layer adalah 1/2,8 kali jumlah neuron input, jumlah hidden layer satu, nilai dropout 0,33, metode aktivasi tanh-tanh-softmax, metode optimasi adamax. Nilai accuracy stabil didapatkan pada iterasi (epoch) ke-600, nilai loss stabil didapatkan pada epoch ke-1000. Nilai accuracy yang didapatkan sebesar 0,8 dan nilai loss 0,32 pada iterasi ke seribu.
PENGARUH GEOMETRI PAHAT, TEBAL PEMAKANAN DAN JENIS PAHAT TERHADAP KEAUSAN DAN KUALITAS KEKASARAN PERMUKAAN HASIL PROSES PEMBUBUTAN BENDA KERJA BAJA AISI 1045 MENGGUNAKAN MESIN CNC QTN 100 U Joko Waluyo
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.v14i2.137

Abstract

In the manufacturing industry the use turning machine has increased significantly, considering that the resulting production has a much better level of quality than conventional lathes. In the CNC machining process parameters greatly affect the quality of surface roughnees and the wear tools used in the machining proccees. The aim of this research is to obtain optimum surface quality and minimal tool smoothness with CNMG and DNMG tool materials. The parameter of the tool angle used are 800 and 550 with athickness of 1 mm, 0,5 mm and a cutting speed of 300 m/minute and feeding 0,25 mm/rotation. The result of the research that the optimum surface roughness values for CNMG and DNMG tool materials were 2,33 µm and 5,01 µm for cutting with a thickness of 1 mm and for cutting with a thicknes of 0,5 mm the roughness value were 1,44 µm and 2,33 µm. Tool wear with CNMG material with tool angle geometry 800 the amount of wear for cutting with a thickness of 1 mm and 0,5mmis 0,016 mm and 0,024mm, for tool 550 with DNMG material, the cutting thicknees of 1mm and 0,5 mm is 0,023 and 0,035 mm.
ANALISIS KEKUATAN STRUKTUR HYDRAULIC LIFTING MACHINE DENGAN MENGGUNAKAN METODE ELEMEN HINGGA Ahmat Saebudin; Hendri Suryanto; Eva Hertnacahyani Herraprastanti
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.v14i2.138

Abstract

Hydraulic Lifting Machine merupakan jenis alat angkat yang didesain untuk memindahan barang ditempat yang relatif sempit. Dalam mendesain suatu alat selain fungsi dan kegunaannya kekuatan struktur merupakan salah satu aspek yang sangat penting untuk diperhatikan. Struktur tersebut haruslah mampu untuk menanggung beban yang timbul saat beroperasi dan memberikan keamanan bagi penggunanya dari kegagalan struktur. Oleh sebab itu tujuan dari penelitian ini adalah untuk menganalisis kekuatan struktur Hydraulic Lifting Machine dengan menggunakan metode elemen hingga. Berdasarkan hasil dari simulasi yang telah dilakukan dimana nilai tegangan resultan dan defleksi maksimum yang timbul pada struktur Hydraulic Lifting Machine yaitu pada beban kerja 100 kg tegangan resultannya sebesar 90,62 MPa dengan defleksi maksimum 4,39 mm, pada beban kerja 250 kg tegangan resultannya sebesar 218,51 MPa dengan defleksi 10,71 mm, pada beban kerja 500 kg tegangan resultannya sebesar 431,68 MPa dengan defleksi 21,25 mm, pada beban kerja 750 kg tegangan resultannya sebesar 644,84 MPa dengan defleksi 31,79 mm, dan pada beban kerja maksimal 1000 kg tegangan resultannya sebesar 858 MPa dengan defleksi 42,33 mm. Berdasarkan pada peraturan BS-5950 Structure Use of Steelwork in Building, nilai batas defleksi maksimumnya tidak boleh lebih dari 7,778 mm. Sedangkan untuk batas tegangan resultannya berdasarkan peraturan Allowable Stress Design (ASD) untuk dinyatakan aman adalah sebesar 149,7 MPa. Sehingga dapat disimpulkan bahwa struktur Hydraulic Lifting Machine layak digunakan dengan beban kerja maksimal 100 kg dengan angka safety factor 2,5. Kata kunci : Crane, Metode Elemen Hingga, Tegangan Von Mises.
KOMBINASI GEOLISTRIK DAN GRID SAMPLING UNTUK MENGIDENTIFIKASI ADANYA KONTAMINASI HYDROCARBON PADA TANAH Supriyadi Supriyadi
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.v14i2.139

Abstract

Hydrocarbon at ground level can be seen visually but this cannot produce accurate quantitative and qualitative values ​​in determining the total volume of the contaminated soil. Therefore a study is needed that can explain quantitatively and qualitatively on contaminated soil so as to facilitate handling and management. Geoelectricity is a quantitative method that can be used in determining soil surface conditions. Qualitatively, the composition of the soil can be proven by laboratory sampling to determine whether it is included in the category of hazardous and toxic waste (LB3) or not in accordance with Annex V contained in Government Regulation No.101 of 2014. This study focuses on the stages to identify their existence. hydrocarbon in the soil using a combination of geoelectric and grid sampling so as to get a more accurate volume of the indicated soil contamination. Whereas the limitation of this study is that it is carried out at a former B-mediation facility that is suspected of being contaminated. Based on the geoelectric studies that have been carried out, the volume of the soil surface that is suspected to be contaminated is 689 m3 (equivalent to 1,381 tons). Meanwhile, when using a combination of geoelectric data and grid sampling on the suspected area, the indicated volume of contamination was 594 m3 (equivalent to 1,190 tons). These results can be concluded that using a combination of geoelectric methods and grid sampling in identifying the presence of contamination on the soil surface can explain quantitatively and qualitatively the volume of contaminated soil with an accuracy of 115%.
Kajian Dampak Tata Guna Lahan terhadap Kinerja dan Biaya Tundaan Simpang (Studi Kasus : Simpang Tiga Jl. GOR – Jl. A. Yani, Kota Blora) Hartono Guntur Ristiyanto
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.v15i01.153

Abstract

The current land use have made the corridor of Jalan GOR in Blora Regency plays an important role in the aspect of transport demand. The area’s development must be balanced with the adequate transport supply in such a way that it will minimize the negative impact due to the imbalance between demand and transport supply. One of the existing transport supply is an unsignalized intersection at the eastern end of the corridor. The potential problem due to the existence of nearby land uses, such as gas stations, on intersection performance is : the presence of delays. Based on those research backgrounds, the formulation of the research problem is: how does the existence of gas station affect the intersection performance and the cost of delay? This research aims to analyze the performance of intersections due to the existence of gas stations. The results of the analysis show that the existence of gas station gives various contribution to intersection performance parameters. Respectively, the biggest effect occurred on the increase in vehicle volume, degree of saturation, and total delay (especially traffic delay). Overall, the existence of a gas station has no effect on the level of service’s value of the intersection. Meanwhile, the value of the highest delay costs occurs during the peak hours of the day. The predicted intersection performance without any geometric improvement for 5 years will begin to decline in third year. Meanwhile, if the intersection is widened, it will begin to decline in the fourth year. However, this geometric improvement has only a very small effect on intersection performance.
Pengaruh Variasi Kecepatan Aliran Udara Terhadap Karakteristik Pembakaran Briket Arang Daun Jati (Tectona Grandis L.F) sarjono sarjono sarjono; Agus widiyanto
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.v15i1.154

Abstract

The potential of biomass teak leaves as an alternative source of energy is so abundant, but not yet fully realized. Teak leaf is one type of biomass that can be used as an alternative fuel. The objective of this research is to determine the influence of pressure variation on the combustion characteristics of teak biobriket charcoal. Testing carried out with a variation of pressing pressure of 350 psi, 600 psi, 850 psi, 1100 psi and 1350 psi. The test results of the influence of pressure variations on the presses against the combustion characteristics of teak charcoal briquettes show that biobriket with lower dipbriglutinous pressure has the highest combustion rate of 0.0928 grams/second. The combustion temperature rate reaches 486.4 ° C and the lowest temperature is 384.3 °c. Mass reduction will be quicker if the temperature of the air flowing into the fuel chamber is higher. The decrease in mass will be faster if airflow speed is raised. Low glutinous pressure causes the fuel to be shorter in its burning time.
SISTEM PENGOLAHAN NILAI UNTUK KURIKULUM PAUD BERBASIS DESKTOP DENGAN MODEL WATERFALL Muksan SAN Junaidi
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.v15i01.156

Abstract

The data processing of Al-Amin's Play Group student scores is still done manually, namely by handwriting on student assessment booksheets, this takes a long time and is not effective. The development of the number of students that increases from year to year requires accuracy in providing assessments without any mistakes and repetition of the same data. The purpose of this research is to design and make student assessment applications with object-oriented programming in the Al-Amin Play Group. Using the Waterfall model System Development Life Cycle (SDLC) method, the design based on the Unified Modeling Language (UML) and the Java Netbeans 8.2 programming language MySQL database. The research data includes student data, student attendance every semester from 2018 to 2019. The final result of the research is an object-oriented student assessment system that can be accessed through a laptop, personal computer (PC) device which is expected to help the foundation to facilitate data collection and processing of value data students and can see the progress of students in each semester at the Al-Amin Play Group in Kedewan Village. The system test results were declared feasible in terms of functionality, amounting to 97.9% in black box testing.
SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN HANDPHONE DENGAN MENGGUNAKAN METODE WEIGHT PRODUCT Muslimah Katoningati; Adhika Pramita Widyassari
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.v15i01.167

Abstract

Mobile as a telecommunication equipment which is the main requirement nowadays, is equipped with many features that every mobile phone has. The large number of types of mobile phones makes consumers have to be smart in choosing cellphones that can be used every day. Not understanding the advantages and disadvantages of improperly chosen mobile phones can cause harm to consumers based on the user's interest level. In this study, a calculation analysis will be carried out with some alternative data for mobile phones based on predetermined criteria using the weighted product method, which can solve the problem by multiplying to connect the rating attribute with the weight attribute concerned. It is expected that from the concept of this calculation analysis can become knowledge about the weighted product method in the selection of recommended cellphones, as a basis for an overview for developing the implementation of the weighted product method into further research.
Analisis Malware Botnet Proteus Pendekatan Static dan Dinamic Indra 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.v15i01.172

Abstract

Botnet Proteus dianggap sebagai salah satu botnet yang mengerikan dampaknya terhadap dunia internet di kisaran tahun 2017, botnet ini mulai dideteksi akhir tahun 2016 dan terus menyebar setelahnya. Proteus adalah botnet yang sample virusnya sulit didapatkan sehingga sangat sedikit penelitian yang membahasnya. Dalam penelitian ini digunakan pendekatan static dan dinamis untuk proses analisis terhadap botnet, pendekatan static dilakukan dengan analisis file virus secara langsung, sedangkan pada pendekatan dynamic, analisa dilakukan melalui jaringan terhadap paket-paket. Hasil analisis menunjukkan bahwa botnet ini menggunakan fitur-fitur Obfuscated, Cryptology, berbasis .Net, memiliki Command & Center, memodifikasi registry, memodifikasi file sistem windows, hanya aktif jika terdapat koneksi internet, tidak melakukan perusakan terhadap file-file yang ada. Kesimpulan akhir dari analisis tersebut menunjukkan bahwa botnet proteus dapat di kategorikan sebagai malware yang lebih bersifat sebagai malware pencuri data serta malware pembuat dan pengontrol zombie computer.

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