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JURNAL POLI-TEKNOLOGI
Published by Politeknik Negeri Jakarta
ISSN : 14122782     EISSN : 24079103     DOI : https://doi.org/10.32722/pt.v20i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
Poli-Teknologi Journal is a journal, which began publication in 2002, published by the Research and community service Unit of Politeknik Negeri Jakarta. It starts from Volume 1 Number 1 in January 2022 for printed version; ISSN (print) 1412-2782 and ISSN (online) 2407-9103. Poli-Teknologi Journal is a series of scientific publications in applied science and technology area from the perspective of a multi and interdisciplinary studies and it is published 3 times in year.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 410 Documents
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Trip Attraction Model at Elementary Schools in Suradita Valley Cisauk District Tangerang Municipal 2022 Safira Sulisiani; Verdy Ananda Upa; Nur Hakim
Jurnal Poli-Teknologi Vol. 23 No. 1 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i1.6504

Abstract

Activity in schools area located in the Suradita Village area has the potential to cause traffic congestion because the schools start time coincides with the rush hour for work. This is due to the fact that the schools do not have a designated area for dropping off passengers, which forces vehicles transporting students to stop or park on the road, reducing the road’s capacity. The purpose of this research to determine trip attraction model, totals of trip attraction, factors that influence of trip attraction, and trip rate on SDN Rahayu, SDN Suradita, MIS Nurul Falah area. The research method used is interview to students, teachers, and staffs about trip data, also secondary data collection were amount of students, teachers, and staffs, land area, floor space, amount of classrooms, parking area of SDN Rahayu, SDN Suradita, MIS Nurul Falah area. Data that has been collected then analyzed with multiple linear regression method used SPSS 25.0 application with significant level 95%. Trip attraction model of SDN Rahayu, Suradita, and MIS Nurul Falah can be attained YSMDS = 0,998 + 0,199 JS + 0,067 JGK – 0,071 JRK with R2 (R square) = 0,636. Total of trip attraction that is generated by SDN Rahayu, SDN Suradita, MIS Nurul Falah area = 463 trip attraction/day. Based on t Test with significant level <0,05, therefore an influential factors are amount of students, teachers, and staffs, also amount of classrooms. Trip rate of SDN Rahayu, SDN Suradita, and MIS Nurul Falah = 0,9 people/m2 or 9 people/100m2.
Designing A Pdf Malware Detection System Using Machine Learning Salman Abdul Jabbaar Wiharja; Deden Pradeka; Wirmanto Suteddy
Jurnal Poli-Teknologi Vol. 23 No. 1 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i1.6540

Abstract

This research proposes an approach to build malicious PDF detection system using random forest algorithm, focusing the Evasive-PDFMal2022 dataset which is updated and extended with the addition of new datasets. This dataset includes malicious PDF files from CVE and Exploit-DB, non-malicious PDF files, as well as files from private collections and Technically-oriented PDF Collection. Features were extracted using the PDFID tool, resulting in 29 structural features that formed the basis for the Random Forest classification algorithm. Experiments showed that the model trained with the new dataset provided accuracy equivalent to the Evasive-PDFMal2022 model, at 98%, albeit with a small decrease in recall for the benign class. In addition, this research involved the creation of a website for metadata extraction and malicious PDF detection. Recognition goes to the dataset contributors, tool developers, and dataset providers from NIST and Exploit-DB. Overall, this research successfully increased the representation and diversity of the dataset, provided good model training results, improved detection from 3 malicious PDF variants to 13 variants, and created a practical tool for malicious PDF extraction and detection. Nonetheless, further development may be required to improve detection performance in more complex scenarios
Biaya dan Tebal Perkerasan Kaku Menggunakan Metode MDP 2017 dan AASHTO 1993 Rizal, Rikki Sofyan; Prihutomo, Nuzul Barkah; Raihan Wahyu Putra
Jurnal Poli-Teknologi Vol. 23 No. 2 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i2.6683

Abstract

The planning and evaluation process of toll road pavement thickness play a crucial role in sustainable toll road design. Road structure design needs to align with construction requirements, and pavement serves to shield the road layers from excessive pressure due to vehicle loads. Recalculating the rigid pavement thickness on the Cinere - Jagorawi toll road section III using the AASHTO and MDP methods aims to determine the most suitable method for determining toll road pavement thickness. Additionally, the study conducts cost calculations for rigid pavement work using slipform concrete paver and conventional methods. The research findings indicate that based on project data analysis, the pavement thickness using the AASHTO method is 16 cm, while the MDP method results in a thickness of 28 cm. The MDP analysis yields a pavement thickness identical to the field measurement of 28 cm, whereas the AASHTO method produces a pavement thickness 12 cm thinner than the field measurement. The effective cost of rigid pavement work using manual methods and concrete pavers amounts to Rp11,640,674,008.34. This cost applies to a thickness of 29 cm, a lane width of 3.7 m, and a work length of 5,700 m. The maximum work length is 3,291 m using manual methods, and the minimum work length is 2,409 m using concrete pavers.
Analysis of Fault Locations Using the Impedance Method on the GIS 150 kV Transmission Line Karang Pilang Surabaya Reza Sarwo Widagdo; Budiono, Gatut; Aris Heri Andriawan; Puji Slamet; Putra, Roy Wibatsu
Jurnal Poli-Teknologi Vol. 23 No. 2 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i2.6837

Abstract

Transmission lines often experience difficulties in determining the location of interference, due to the length of the transmission line. This interference can be secured by using relays, one of which is a distance relay, this tool secures the zone 1, zone 2 and zone 3 areas on the transmission line. Apart from relays, there is also a tool to determine the fault distance, namely a fault locator. These two tools are examples of protection on transmission lines. The method used in this research uses the impedance method to determine the distance the fault occurs and the settings on the distance relay. This technique is often used in electric power systems and is very effective for transmission lines, such as those in Karang Pilang, because of its ability to detect disturbances in transmission lines and equipment. Based on the analysis results, calculating the fault distance using the impedance method shows that the calculated value is very close to the distance measured by the fault finder. Specifically when a short circuit occurs, the impedance method calculates a distance of 14.35 km, while the fault locator measures it at 14.59 km with a margin of error of 1.5%.
Developments in Abrasive Water Jet Machining of Nonmetals Gupta, Kapil
Jurnal Poli-Teknologi Vol. 23 No. 2 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i2.6910

Abstract

Abrasive water jet machining (AWJM) is known for precise cutting of metals and nonmetals. In the past few years, this machining technology has undergone some important developments which possibly enhanced its capability and extended its applications. This article presents such important developments and related attempts on AWJM made by researchers in the recent past. The scope covers AWJM of important nonmetallic materials like rock, glass, rubber, composites and ceramics etc. The important developments have been in the form of utilizing abrasives like sugar particles, glass beads, ice particles, bone powder; water-less abrasive jet machining; process optimization; and acoustic emission monitoring etc. that enhanced the capability of the AWJM process towards cost reduction, quality enhancement, and sustainability. The article intends to amass such important information related to the recent developments in AWJM for nonmetal cutting and aims to facilitate scholars and researchers with this new knowledge.
Analisis Penyebaran Temperatur pada Desain Mold Prototype Mesin Injeksi Molding Manual Double Barrel Kapasitas 5 TF Prawira, Valen Yudha; Muslimin; Silitonga, Muhammad Prasha Risfi; Almahdi
Jurnal Poli-Teknologi Vol. 23 No. 3 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i3.6604

Abstract

This study analyzes the temperature spread distribution in the core and cavity design of a manualdouble-stage injection molding machine with a 5 tons force (TF) capacity. The injection mold isutilized to process polypropylene (PP) material into an injection product in the shape of the PNJlogo. This research aims to examine the temperature spread distribution resulting from a 100-wattcartridge heater located on the support plate of the mold, with a focus on the core and cavitytemperatures. Manual calculations using heat transfer conduction principles and finite elementanalysis (FEA) simulations using software were conducted in this study. The parametersinvestigated include the temperature values across the support plate mold, core, and cavity. Theresults of the manual calculations indicate that the temperatures on the support plate mold, core,and cavity are 58.96°C, 57.34°C, and 57.34°C, respectively. The simulation analysis yieldedmaximum temperatures of 89.53°C for the support plate mold and 88.11°C for both the core andcavity. The manual calculations and simulation analysis produced accurate and reliable results,confirming that the standard mold temperature range for processing polypropylene is between20°C and 90°C. This analysis demonstrates that the identified temperature levels are safe forpolypropylene processing, providing high confidence in the validity of the research findings.
Analysis of Spectrum Vibration on Motor Cooling Tower at PT. X Wibawaputra, Dhimas Rizky Anugrah; Gunadi, Gun Gun Ramdlan; Santoso, Budi
Jurnal Poli-Teknologi Vol. 23 No. 3 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i03.6963

Abstract

Vibration monitoring is one of the Condition Based Maintenance methods currently widely applied in industry to ensure asset reliability which aims to determine the actual condition status of the machine and to detect potential problems before damage occurs. Vibration values at the Drive End (DE) and Non-Drive End (NDE) of the cooling tower motor as a fan drive in conditions vibration causes damage based on ISO 10816-3. The results of spectrum analysis of high amplitude at 1X and some 2X and 3X on the axial side indicate that the cause of vibration is misalignment. After the repair, there is a decrease in the vibration value of the DE and NDE motor parts on the axial side from 14.7 mm/s and 12.4 mm/s to 2.3 mm/s and 2.6 mm/s so that it is said to be able to operate long-term.
The Effect of Vetiver Roots on Stability Slope Siagian, Agung Prasetya; Yelvi; Praditya, Andikanoza
Jurnal Poli-Teknologi Vol. 23 No. 3 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i3.7039

Abstract

Slope stability is a crucial factor in land management, especially in the context of environmental protection and erosion control. Vetiver plants can increase the compressive and shear strength of soil. The purpose of this research is to analyze the effect of vetiver roots on soil cohesion and shear angle in the laboratory and to analyze the effect of vetiver roots on slope stability using Geostudio Slope/w software in 2024. The analysis method used is the bishop method. The results obtained based on laboratory testing state that vetiver roots that have an age of 5-6 months increase the cohesion value from 0.099 kg/cm2 to 0.240 kg/cm2. The cohesion value increased by 142% at a depth of 20 cm against a slope of 35.54°. Based on the slope stability analysis using Geostudio slope/w in 2024, the largest percentage increase in safety factor (SF) value was obtained at 4.98% with a distance between vetiver plants of 80 cm and 10.32% with a distance between vetiver plants of 30 cm. However, the subsequent increase in root length did not affect the safety factor (SF) value.
PENINGKATAN KINERJA ALAT UJI KUAT TEKAN BEBAS DARI MANUAL KE MOTOR LISTRIK Pahinggis, Mayda; Wakidi
Jurnal Poli-Teknologi Vol. 23 No. 3 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i3.5141

Abstract

The unconfined compression test apparatus is an essential tool in soil mechanics laboratories to evaluate the shear strength of soil. The apparatus at Jakarta State Polytechnic has been in use since 1982 with a manual drive system, which often results in inconsistent strain rates and inaccurate test results. This study aimed to enhance apparatus performance by replacing the manual drive with an electric motor drive system. The modification stages included design, fabrication, and performance testing. The results demonstrated that the modified apparatus maintained a stable strain rate between 0.52% and 1.95% per minute, fully complying with the required standard range of 0.5%–2% per minute. Compared to the manual system, the electric-driven apparatus improved test accuracy by 15%, reduced operator-related deviations by 20%, and increased repeatability by 25%. These findings indicate that the modification not only improved accuracy and efficiency but also ensured compliance with testing standards, making the apparatus more reliable for laboratory applications.
Comparison of Artificial Water Pump Drive Models Zuraida, Ida; Pramudya Kurniawan; Wattini
Jurnal Poli-Teknologi Vol. 23 No. 3 (2024)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v23i3.6446

Abstract

Starting from a printed water filter that uses an electric water pump, we tried to make a breakthrough by making an artificial pump using wind energy. Wind energy requires an appropriate drive model. Two driving models were tried and then compared between the two to get the best model to be applied as a recommendation for the wider community. In the initial stage, model design was carried out, both an artificial pump model and a driving model with two variations. Next, prepare the necessary materials, then make the model. For pump models from PVC pipes, drive models from plastic drums and drive models from mineral bottles as well as supporting system models. The supporting system is a network of intake pipes to the pump system and from the pump to the reservoir. Then the final step is to make a tower model from light steel with a height of approximately 10 meters. All models made such as custom pumps and drive models need to be tested to ensure whether the model can function properly. Apart from that, it is also necessary to evaluate if there are obstacles so that it can function optimally. Next, data collection and analysis of existing data is carried out. The final step is to draw a conclusion regarding the model being made and choose the best drive model with all its advantages and disadvantages. Based on nine trials by rotating the drive models (2 models) manually, a conclusion can be drawn that Drive Models 1 and 2 can rotate well, the crank also functions well and the artificial pump after evaluation is finally functional and able to drain as much water as possible. 0.38 liters per one revolution of the drive model. The volume of water obtained is the maximum capacity based on a comparative calculation of the volume of the pump tube of 0.34 liters. Both Drive Models can be raised to a higher level of 5 meters or 10 meters for strong wind gusts. However, because the area where the research was conducted, the wind gusts were protected by tall buildings, so the results were not optimal.

Page 41 of 41 | Total Record : 410

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