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INDONESIA
Journal of Science and Engineering
Published by Universitas Khairun
ISSN : 27209350     EISSN : 26213435     DOI : http://dx.doi.org/10.3387/josae
Core Subject : Science, Art, Engineering,
Arts Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
Merupakan Jurnal Ilmiah Fakultas Teknik Universitas Khairun yang memuat hasil-hasil riset bidang ilmu-ilmu teknik dan Rekayasa
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 126 Documents
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ANALISA INDEKS KUALITAS INFRASTRUKTUR DRAINASE PERKOTAAN DAN JARINGAN IRIGASI DI KABUPATEN SIKKA Bhara, Firnimus Konstantinus; Lete, Maria Kurniaty
Journal of Science and Engineering Vol 7, No 2 (2024): Journal of Science and Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i2.8603

Abstract

At the end of December 2023, there was a problem of surface runoff or runoff at several locations in Sikka Regency. The impact of this runoff caused traffic flow activities to become congested due to sedimentation in the form of plastic, wood, and rubbish from the drainage towards the road; and in February 2024 there a problem of thousands of toddlers in Sikka Regency experiencing stunting/malnutrition. These two problems raise a question about the quality of drainage channels and irrigation channels in Sikka district, whether they function optimally in minimizing urban runoff for urban drainage, and can channel water flow to tertiary plots to irrigate rice fields for the irrigation network system. ?; this research aims to provide information to readers regarding the quality assessment of the physical infrastructure of urban drainage infrastructure and existing irrigation networks based on Ministerial Regulation Number 12/PRT/2015. The method used in this research is a case study or field study method, at 5 research locations, namely urban drainage in the districts of Kota Uneng, Kabor, and Beru as well as the Koro Irrigation Network in Magepanda District and the Kojablo Irrigation Network in Talibura District; Next, the data is processed and analyzed using Excel 2019 software and conclusions are drawn. The research results show that the percentage for urban drainage is 31%, categorized as severely damaged drainage conditions; while the percentage of the irrigation network was 58.50%, which was categorized as the condition of the irrigation network being moderately damaged.
Perangkat Pengukur Kondisi Kemiringan Rel Kereta Api Menggunakan Sensor Giroskop Berbasis GPS Nugroho, Syahrizal Rohmatul; Salim, Alfi Tranggono Agus; Echsony, Mohammad Erik; Patrialova, Sefi Novendra; Setyawan, Romal Hadi
Journal of Science and Engineering Vol 7, No 1 (2024): Journal Of Science And ENgineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i1.8009

Abstract

Rail quality decreases directly in proportion to the operating time of the train since the rail is loaded from the train wheels. Railroad tracks are inspected by PPJ (Track Inspector) by using a track gauge master to measure slope. Manually operated devices cause PPJ to run along the railroad between stations, causing accidents and requiring relatively long operating times. Using a device that measures the slope of railroad tracks is a more effective solution to these problems. The device uses a gyroscope sensor and GPS module to locate non-standard rails. A complementary filter is applied to the converted pitch and roll values. A slope measuring instrument was used to test the accuracy of pitch and roll angles. Gyroscope sensors are calibrated to prevent measurement errors (errors). Based on the results, the gyroscope sensor had an accuracy error of 0.20° in pitch and 0.27° in a roll. A complementary filter reduces error accuracy to 0.06° for pitch and 0.08° for roll. Its accuracy compared to smartphone GPS is 5.38 meters, while its accuracy compared to the actual location is 7.74 meters.
Pengaruh Suhu Penuangan Terhadap Kualitas Dan Cacat Coran Aluminium Bekas Kaleng Minuman Dengan Metode Lost Foam Casting Tjiroso, Bambang; Umar, Kifli; Rais, Sandi; Rajak, Sahdar; Zulfikram, Zulfikram
Journal of Science and Engineering Vol 7, No 2 (2024): Journal of Science and Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i2.9322

Abstract

The purpose of this study is to determine the effect of pouring temperature on defect quality in aluminum castings for beverage cans, using the Lost Foam Casting method. The results indicate that pouring temperature significantly influences casting quality. Higher pouring temperatures improve casting quality by increasing fluidity, allowing the molten metal to better fill the mold cavities. Conversely, lower pouring temperatures reduce the aluminum's flowability. Observed defects primarily include cavities or small holes ranging in size from approximately 0.28000 µm to 0.6843 µm, suggesting porosity defects. Larger cavities (0.6843 µm) likely result from gas entrapment or shrinkage during cooling, while smaller cavities may be due to gas trapped on the surface of the castings.
Pemanfaatan Moringa oleifera melalui Proses Elektroflotasi Biokoagulasi dalam Penjernihan Limbah Cair Laboratorium Setyowati, Rr Diah Nugraheni; Wijayanti, Arik; Suriani, Efa; Adila, Surya Puspa; Al Hikmi, Achmad Syahri
Journal of Science and Engineering Vol 7, No 1 (2024): Journal Of Science And ENgineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i1.8378

Abstract

The problem of waste was a serious concern of the world, as well as for the government and the people of Indonesia. The particular concern regarding waste does not only apply in the industrial and trade sectors, but also in other sectors that generate waste such as in the tourwasm, health, research development, and education sectors, especially those that have integration laboratory. The biocoagulant used were moringa seeds with a dose variation of 0.025; 0.05; and 0.1 grams/250 mL. The electroflotation process was carried out electrodes, namely graphite electrodes at the anode and stainless steel at the cathode with a constant voltage of DC 21 V for 60 minutes. The effectiveness of the electroflotation-biocoagulation process was valuated by looking at the decrease in the electrical conductivity (EC), total dwassolved solids (TDS), turbidity, metal Pb and Cu. The study's result was the electroflotation-biocoagulation process was more effective than the electroflotation and coagulation processes. Electrical conductivity (EC) was successfully reduced to 9.76% by 0.1 gram/500 mL, TDS (dwassolved solids) was reduced to 8.78% by moringa oleifera, waste turbidity was decreased to 91.70%, the concentration of Pb was reduced to 12.80 % and Cu was reduced to 0,119. 
STUDI TINGKAT KEPUASAN PENGHUNI RUSUNAWA GAMALAMA TERNATE TERHADAP KUALITAS LINGKUNGAN DAN BANGUNAN Ilyas, Isma; Ahadian, Edward Rizky; Yuda S, M. Taufik; Irnawaty, Irnawaty
Journal of Science and Engineering Vol 7, No 2 (2024): Journal of Science and Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i2.8878

Abstract

The limited service capability of rent-based flats in meeting the needs of residents will affect the living satisfaction conditions of the residents. Rusunawa Gamalama has several problems, such as garbage and poor ceiling conditions. The purpose of this study was to determine the level of resident satisfaction with the quality of the environment and buildings in Rusunawa Gamalama Ternate. Data collection was carried out by distributing questionnaires to residents of the Gamalama flat. Percentages are used to analyze environmental and building quality satisfaction. The results showed that the quality of the environment resulted in an average level of 67.32% which means satisfaction. The highest value was found in the sub-variable of regional location conditions, namely 90.10%, and the lowest value was found in the sub-variable of social environment, namely 52.12%. At the same time, the level of building quality produces an average of 75.47% which means satisfaction. The highest value was found in the floor sub-variable, namely, 91.81%, and the lowest was found in the roof covering sub-variable, 39.69%).
Korelasi Kadar Air Tanah dan Nilai Geo-Resistivitas Metode Geolistrik Antarissubhi, Antarissubhi
Journal of Science and Engineering Vol 7, No 1 (2024): Journal Of Science And ENgineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i1.8011

Abstract

Air tanah adalah air yang bergerak di dalam bumi menempati ruang butir atau ruang pori. Identifikasi untuk mengetahui keberadaan lapisan penahan air pada kedalaman tertentu, dapat menggunakan metode geofisika yaitu metode geolistrik resistivitas dengan konfigurasi Wenner. Prinsip metode resistivitas adalah mengalirkan arus listrik ke dalam bumi dengan cara mengkontakkan dua elektroda arus, kemudian mengukur distribusi potensial yang dihasilkan. Untuk analisis kelengkapan 1D digunakan sounding data geolistrik dengan software IP2Win dan MATLAB untuk visualisasi data. Pembacaan resistivitas di lapangan dan kondisi eksisting di lapangan akan divalidasi menggunakan indeks uji laboratorium. Parameter yang dibutuhkan adalah nilai kadar air dan berat jenis, serta klasifikasi tanah berdasarkan distribusi ukuran butir. Hasil penelitian menunjukkan bahwa kadar air menurun sedangkan nilai resistivitas meningkat pada setiap lapisan dengan nilai kadar air terendah berkisar 41% - 72% dan nilai hambatan sekitar 16,4 m - 552 m. 
KARAKTERISTIKBATUAN METAMORF PAPALOANG -BACAN, HALMAHERA SELATAN, PROVINSI MALUKU UTARA Madi, Almun; Alkatiri, Hilda; Firman, Firman
Journal of Science and Engineering Vol 7, No 2 (2024): Journal of Science and Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i2.9330

Abstract

The research location is in Papaloang village, Bacan Island, South Halmahera Regency, North Maluku Province. Metamorphic rocks in the Papaloang-Bacan Complex can be predicted as thermal dynamo metamorphic rocks (regional metamorphic), and are part of the Sibela Continental Suite which is Precambrian in age. The purpose of this study was to determine the characteristics of these rocks using petrographic methods, namely identifying texture, structure, and mineral content. Based on field observations and laboratory test results, metamorphic rocks in Papaloang are dominated by schist, mica schist, chlorite schist, chlorite-epidote schist, some phyllite, quartzite and gneiss with varying mineral compositions including biotite, hornblende/amphibolite, muscovite, tremolite-actinolite. Also filled with sulfide minerals such as pyrite, chalcopyrite, covellite and chalcocite as well as several iron oxide minerals. Foliation is relatively good, characterized by changes and interlocking of several minerals such as hornblende interlocking tremolite-actinolite, quartz interlocking iron oxide and Opak minerals, and changes in muscophite mica to biotite. This process is most likely related to high pressure from endogenous processes.
ANALISA KEBUTUHAN KAPAL FERRY TERNATE – TIDORE Irnawaty, Irnawaty; Saputra, Muhammad Taufiq Yuda
Journal of Science and Engineering Vol 7, No 1 (2024): Journal Of Science And ENgineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i1.8434

Abstract

Ferry transport is a form of transportation system that can connect regions in Indonesia to support the economy and development in areas separated by water. One of the crossings currently operating is the Ternate–Tidore crossing. The Ternate-Tidore crossing is an inter-city crossing that connects the cities of Ternate and Tidore. This research aims to find out how much cargo growth (passengers, R2, R4/6, and goods) will increase on the Ternate-Tidore crossing in the future, namely in the next 10 years, namely 2023 - 2032 and to find out how much the ferry crossing needs. Ternate - Tidore crossing in 2032. The method used in this research is a quantitative research method, because the data taken is quantitative data, in data management the methods used are the Least Square Method and the Geometric Method. Based on research results, the average load growth over the next 10 years, namely from 2023 - 2032, is 4% for passengers, 5% for R-2 vehicles and 5% for R-4/6 vehicles and 6% for goods and Load Factor in 2032 has reached 1.3%, which means that the level of demand for ferry transportation has exceeded the available capacity, which is in accordance with the requirements issued by the Ministry of Transportation through the Directorate General of ASDP that the Load Factor for public transportation is a maximum of 1.1%. This condition shows that the loading capacity of Ferry ships or (load factor) in 2013 cannot be maintained until 2032. Therefore, the need for Ferry ships to be operated for the next 10 years, namely 2023 - 2032, is 6 ships with a trip of 13 trips/passage.Ferry transport is a form of transportation system that can connect regions in Indonesia to support the economy and development in areas separated by water. One of the crossings currently operating is the Ternate–Tidore crossing. The Ternate-Tidore crossing is an inter-city crossing that connects the cities of Ternate and Tidore. This research aims to find out how much cargo growth (passengers, R2, R4/6, and goods) will increase on the Ternate-Tidore crossing in the future, namely in the next 10 years, namely 2023 - 2032 and to find out how much the ferry crossing needs. Ternate - Tidore crossing in 2032. The method used in this research is a quantitative research method, because the data taken is quantitative data, in data management the methods used are the Least Square Method and the Geometric Method. Based on research results, the average load growth over the next 10 years, namely from 2023 - 2032, is 4% for passengers, 5% for R-2 vehicles and 5% for R-4/6 vehicles and 6% for goods and Load Factor in 2032 has reached 1.3%, which means that the level of demand for ferry transportation has exceeded the available capacity, which is in accordance with the requirements issued by the Ministry of Transportation through the Directorate General of ASDP that the Load Factor for public transportation is a maximum of 1.1%. This condition shows that the loading capacity of Ferry ships or (load factor) in 2013 cannot be maintained until 2032. Therefore, the need for Ferry ships to be operated for the next 10 years, namely 2023 - 2032, is 6 ships with a trip of 13 trips/passage. 
Rancang Bangun Modul Pembelajaran High Pass Filter dan Low Pass Filter untuk Praktikum di Laboratorium Teknik Telekomunikasi Politeknik Negeri Sriwijaya Zefi, Susan; Ciksadan, Ciksadan; Alifah, Farah Balqis; Shalama, Maura Fatima
Journal of Science and Engineering Vol 7, No 2 (2024): Journal of Science and Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i2.8929

Abstract

Filters are one of the series that are needed in everyday life. Both in the fields of electronics and telecommunications.This circuit is composed of passive components, namely resistors and capacitors. The research method used is the experimental method for the module design stage which will be tested and prove the output results based on theory. Based on data from experiments that have been carried out, the passive second order high pass filter and low pass filter circuit produces the same frequency response as the theory, namely when the circuit is given a voltage of 1V and a different frequency, it produces the frequency response graph increases where the higher the frequency, the higher and more stable the frequency response graph produced vice versa. According to the data that has been obtained and converted to a frequency response graph, it proves that the frequency response graph of the module made is almost the same as the frequency response graph of the CET-17202B-01 module, only there is a slight difference in the output voltage and tolerance due to the influence of the load on the components used. 
Evaluasi Angka Kebutuhan Nyata Operasi Dan Pemeliharaan Pada Bangunan Pantai Talud Seli Kota Tidore Kepulauan Ahmad, Badrun; K. Misbah, Zulkarnain; Taufiq Y.S, Muhammad
Journal of Science and Engineering Vol 7, No 1 (2024): Journal Of Science And ENgineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v7i1.8107

Abstract

AbstractThis research uses a probability distribution method and a probability test to calculate the planned rainfall. Buoy method for calculating river discharge. Rational method, Kirpich method, Mononobe method for calculating flood discharge and Manning method for calculating planned and existing cross-sectional capacity. Flood discharge on the Aru River for a return period of 2 years, 23.18 m³/second for a return period of 5 years, 28.26m³/second for a return period of Seli Beach which is located in the City of Tidore Islands. This research is to determine the level of damage to the embankment building and the appropriate maintenance method for the coastal protection structure. The method used in the research is a direct survey method in the field. The results of this research showed that the length of the building was 462 meters, the results of the calculation of the condition index for coastal safety buildings in Seli Village, Tidore Islands City were at a level of damage of 2.5 - 3.5, which shows that this riparian dam was in light - heavy damage. This 462 meter long dam requires regular and periodic repairs and maintenance. Based on the results of the AKNOP preparation carried out, the total operational costs required for the talud building are obtained at Rp. 59,334,547.62, and the cost of maintaining the talud is Rp. 780,680,536.07.g 10 years, 31.45 m³/second for a return period of 20 years, 34.51 m3/second. The existing average discharge of the Aru River is 24.14 m³/second, for the planned discharge of the Aru River cross-section it is 78.808 m³/second and for the embankment design model which is in accordance with flood discharge the embankment maintenance height is 1 m for embankment height of 2.5 m .Keywords— Talud, Seli, Aknop, Evaluation AbstrakPenelitian ini menggunakan metode distribusi probabilitas dan uji probabilitas. Metode pelampung untuk menghitung debit sungai. Metode rasional, metode Kirpich, metode Mononobe untuk menghitung debit banjir. Debit banjir pada Sungai Aru untuk periode ulang 2 tahun, 23,18 m³/detik untuk periode ulang 5 tahun, 28,26m³/detik untuk periode ulan Pantai Seli yang terletak di Kota Tidore Kepulauan. Tujuan dari penelitian ini adalah untuk mengetahui tingkat kerusakan pada bangunan talud dan metode pemeliharaan yang tepat terhadap bangunan pengaman pantai tersebut. Metode yang di gunakan pada penelitian adalah metode survei langsung di lapangan. Hasil penelitian ini diperoleh panjang bangunan 462 meter, hasil perhitungan indeks kondisi bangunan pengaman pantai di Kelurahan Seli Kota Tidore Kepulauan berada pada tingkat kerusakan 2,5 – 3,5 yang menunjukan talud ini dalam kerusakan ringan – berat. Panjang talud 462 meter ini memerlukan perbaikan dan pemeliharaan secara rutin dan berkala. Berdasarkan hasil penyusunan AKNOP yang dilakukan, sehingga diperoleh total biaya operasional yang dibutuhkan untuk bangunan talud Rp. 59.334.547,62, dan biaya pemeliharaan talud sebesar Rp. 780.680.536,07.g 10 tahun, 31,45 m³/detik untuk periode ulang 20 tahun, 34,51 m3/detik. Debit rata-rata eksisting Sungai Aru sebesar 24,14 m³/detik, untuk debit rencana penampang sungai Aru sebesar 78,808 m³/detik dan untuk model desain tanggul yang sesuai dengan debit banjir di dapat tinggi jagaan tanggul 1 m untuk tinggi tanggul 2,5 m.Kata kunci— Talud, Seli, Aknop, Evaluasi

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