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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

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.

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

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 Âµm to 0.6843 Âµm, suggesting porosity defects. Larger cavities (0.6843 Âµm) likely result from gas entrapment or shrinkage during cooling, while smaller cavities may be due to gas trapped on the surface of the castings.

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

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%).

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

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.

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

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.Â

Analisis Kualitas Website Universitas Khairun Menggunakan System Usability Scale (Sus) Muhammad, Miftah; Hizbullah, Imam; Mabud, Zulaihah
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.v7i2.9391

Abstract This study analyzes the quality of the Khairun University website (unkhair.ac.id) using the System Usability Scale (SUS) method. SUS is an evaluation method consisting of 10 statements that assess effectiveness, efficiency, and user satisfaction. Data were collected by distributing questionnaires to 200 respondents who were students from 10 faculties at Khairun University. The results showed an average SUS score of 64.3, which places the quality of the website at grade "D" or based on the Acceptability range is in the "Marginal Low" range with an "OK" assessment in the adjective rating assessment. Analysis of the distribution of respondents' answers indicates that although most users find the website easy to use, there are aspects that require more attention, especially in design and navigation. Recommendations for improvement include increasing design consistency, simplifying the usage process, and adding documentation and user guides. The results of this study are expected to be a reference for improving the user experience and usability of the Khairun University website.

ANALISIS POTENSI PEMANFAATAN BATU GAMPING DI DESA DAEO, KABUPATEN PULAU MOROTAI Firman, Firman; Bundang, Syarifullah; Sahetapy, George Belly
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.v7i2.9060

Secara geologi, Pulau Morotai khusushnya Desa Daeo didominasi oleh batu gamping. Batu gamping banyak dijumpai tersingkap di beberapa titik pada Desa Daeo dengan ketebalan singkapan bervariasi. Batu gamping sebagai batuan karbonatan dapat dapat dimanfaatkan di berbagai sektor, seperti bahan baku semen, bahan konstruksi, pupuk pertanian, penjernih air, kosmetik, bahan pengolahan biji logam dan lain-lain. Metode pengumpulan data pada penelitian dengan melakukan observasi lapangan berupa pengambilan titik koordinat, pengambilan sampel batu gamping, preparasi sampel dan pengujian sampel dengan X-Ray Fluorescence (XRF). Data penelitian kemudian diolah dan dianalisis untuk mengetahui potensi pemanfaatan batu gamping di lokasi penelitian. Berdasarkan hasil penelitian, diperoleh 3 sampel batuan dengan komposisi kimia batuan masing-masing sampel MRT 1Â Â Â Â Â Â Â Â Â Â Â Â 0.52% Fe2O3, 4.56% MgO, 40.32% CaO, 0.28% SiO2, 0.01% MnO, MRT 2 0.36% Fe2O3 ,4.42% MgO, 43.53% CaO, 0.17% SiO2, 0.01% MnO dan MRT 3 0.50% Fe2O3 , 4.88% MgO, 40.08% CaO, 0.25% SiO2,0.01% MnO. Potensi pemanfaatan batugamping di Desa Daeo, Morotai untuk bahan bangunan, bahan penstabil jalan, dan bahan baku pupuk di sektor pertanian.

EVALUATION OF EXISTING HAULING ROAD GEOMETRY TO INCREASE NICKEL LATERITE PRODUCTION AT PT. PUTRA MEKONGGA SEJAHTERA Aswar, Aidil; Salu, Sahrul Poalahi; Arif, Arif
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.v7i2.8170

PT Putra Mekongga Sejahtera is a nickel laterite mining company located in Pomalaa District, Kolaka Regency, Southeast Sulawesi Province. In a mining activity, many factors affect the aspects of production achievement, one of which is the haul road. Haul roads make a major contribution to smooth transportation operations if the road geometry is in accordance with the dimensions of the conveyance used, then the production target of 80,000 tons / month can be achieved. The current field conditions in terms of road geometry are considered unrepresentative for the movement of hauling equipment and can interfere with mining activities. Based on actual haul road geometric measurements between 5.41-16.98 meters while the theoretical road width for straight roads is 8.72 meters. The actual bend road width ranges from 5.50-15.10 meters while the theoretical bend road width is 14.32 meters. The actual road slope ranges from 0.35% to 17.30% while the maximum road slope is 12%. After evaluation, there are 4 straight road segments that need to be increased in width, namely segments AB, BC, CD and DE and 5 segments of bend road width, namely segments AB, BC, CD, DE and EF, as well as grade reduction in segments AB, BC, DE and EF. Hino FM 260 JD dump truck production before road geometry improvement is 3029 tons/day or 78761.75 tons/month. Hino FM 260 JD dump truck production after ideal road geometry improvement is 3143 tons/day or 81724.38 tons/month.Â

ANALISIS DEBIT BANJIR DENGAN METODE HIDROGRAF SATUAN SINTETIK NAKAYASU DAN HIDROGRAF SATUAN SINTETIK SNYDER PADA SUNGAI KOBE KABUPATEN HALMAHERA TENGAH Ahmad, Badrun; Misbah, Zulkarnain K.; Nagu, Nani; Sukamto, Titi Wulandari
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.v7i2.9161

ANALISIS POTENSI PEMANFAATAN BATU GAMPING DI DESA DAEO, KABUPATEN PULAU MOROTAI Firman, Firman; Bundang, Syarifullah; Sahetapy, George Belly
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.v7i2.9060

Secara geologi, Pulau Morotai khusushnya Desa Daeo didominasi oleh batu gamping. Batu gamping banyak dijumpai tersingkap di beberapa titik pada Desa Daeo dengan ketebalan singkapan bervariasi. Batu gamping sebagai batuan karbonatan dapat dapat dimanfaatkan di berbagai sektor, seperti bahan baku semen, bahan konstruksi, pupuk pertanian, penjernih air, kosmetik, bahan pengolahan biji logam dan lain-lain. Metode pengumpulan data pada penelitian dengan melakukan observasi lapangan berupa pengambilan titik koordinat, pengambilan sampel batu gamping, preparasi sampel dan pengujian sampel dengan X-Ray Fluorescence (XRF). Data penelitian kemudian diolah dan dianalisis untuk mengetahui potensi pemanfaatan batu gamping di lokasi penelitian. Berdasarkan hasil penelitian, diperoleh 3 sampel batuan dengan komposisi kimia batuan masing-masing sampel MRT 1Â Â Â Â Â Â Â Â Â Â Â Â 0.52% Fe2O3, 4.56% MgO, 40.32% CaO, 0.28% SiO2, 0.01% MnO, MRT 2 0.36% Fe2O3 ,4.42% MgO, 43.53% CaO, 0.17% SiO2, 0.01% MnO dan MRT 3 0.50% Fe2O3 , 4.88% MgO, 40.08% CaO, 0.25% SiO2,0.01% MnO. Potensi pemanfaatan batugamping di Desa Daeo, Morotai untuk bahan bangunan, bahan penstabil jalan, dan bahan baku pupuk di sektor pertanian.

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Mohamad Jamil

Contact Email
jamilkhairun@gmail.com

Phone
-

Journal Mail Official
josae@unkhair.ac.id

Editorial Address
Jl.Pertamina Kampus II Unkhair Gambesi Kota Ternate Selatan

Location
Kota ternate,

Maluku utara

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Mohamad Jamil

Contact Email jamilkhairun@gmail.com

Phone -

Journal Mail Official josae@unkhair.ac.id

Editorial Address Jl.Pertamina Kampus II Unkhair Gambesi Kota Ternate Selatan

Location Kota ternate, Maluku utara INDONESIA

Abstract

Abstract

Abstract

Abstract

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Contact Name
Mohamad Jamil

Contact Email
jamilkhairun@gmail.com

Phone
-

Journal Mail Official
josae@unkhair.ac.id

Editorial Address
Jl.Pertamina Kampus II Unkhair Gambesi Kota Ternate Selatan

Location
Kota ternate,

Maluku utara

INDONESIA