cover
Article Per Year (5 Year)
All
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
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
 8   9   10   11   12 
ANALISIS PENGARUH PERBANDINGAN LAJU SEDIMEN TRANSPORT SALURAN TERBUKA SEBAGAI UPAYA MEMINIMALISIR BANJIR ROB DUSUN JEDAWAIR lete, Maria kurniaty; Yuneta, Margaretha; Kabupung, Alfrendo Satriawan
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.9612

Abstract

Pada lokasi penelitian di Dusun Jedawair, Kecamatan Kewapante ditemukan permasalahan banjir rob yang mengakibatkan beberapa rumah warga terendam air hingga kedalaman 15 sentimeter sehingga menyebabkan aktivitas warga di lokasi penelitian menjadi terganggu. Penelitian ini bertujuan untuk mengevaluasi banjir rob yang terjadi di lokasi penelitian, “bagaimana laju sedimentasi material tanah, agregat halus, agregat kasar, plastik mempengaruhi laju aliran?”, dan memberikan strategi tindak lanjut untuk mengatasi permasalahan tersebut. Metode penelitian eksperimen ini menggunakan alat uji flume di Laboratorium Hidrolika Universitas Nusa Nipa dan menganalisis permasalahan lokasi penelitian menggunakan analisis SWOT. Hasil dari penelitian eksperimen sedimen penghambat aliran yang terdiri dari kerikil, pasir, dan plastik yang menyebabkan terjadinya banjir rob (banjir akibat naiknya muka air laut). Yang direkomendasikan dari hasil pengujian di laboratorium adalah orde debit aliran sedimentasi tanah mempunyai debit terkecil baik pada kondisi debit penuh maupun debit tidak lengkap, nilai debit aliran, Q sedimentasi tanah pada kondisi debit penuh sebesar 0,07 liter/detik; Q sedimentasi tanah pada kondisi debit penuh sebesar 0,08 liter/detik; Dengan demikian, sampel pasir, kerikil dan plastik menjadi sedimen yang perlu dihindari karena mempunyai laju aliran yang besar yang menjadi alasan terjadinya peningkatan aliran secara cepat yang menyebabkan terjadinya banjir rob.
Performance Optimization of Hydraulic Type Load Frequency Control in Hydropower Plants: Study of Controllers with dan Without Droop Characteristics Laksono, Heru Dibyo; Putri, Dhea Rahmadani; Muharam, Mumuh; Pratama, Rizki Wahyu
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.9730

Abstract

This research discusses the performance of the hydraulic type Load Frequency Control (LFC) system in hydropower plants using a single controller configuration equipped with a governor against power input. The Load Frequency Control (LFC) system is used to stabilizer the power frequency during load changes by considering the influence of droop characteristics on the governor. Analysis is performed using MATLAB simulation to measure transient parameters such as rise time, peak time, steady state time, and maximum skip. The results show that the use of droop on the governor is more effective in reducing overshoot, improving system stability, but slowing down the response time. Conversely, the configuration without droop accelerates the system response but risks overshoot. Controllers with derivative components such as PD and PDF, are superior in achieving rise time. Whereas, controllers that have integral components such as PI, PID, and PIDF are better at controlling overshoot when using droop characteristics. In conclusion, the combination of droop characteristics with derivative components in the governor provides optimal performance in maintaining the frequency stability of the hydraulic type Load Frequency Control (LFC) system.
Utilization Of Cashew Nut Seeds For Liquid Smoke Production Using The Pyrolysis Method Jayanegara, Sudarmanto; Alqadri, A. Imam Ramdhana; Mandasini, Mandasini; Sayudi, Chayping Mardi; La Ifa, La Ifa
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.9642

Abstract

Waste biomass is increasingly growingly and will be environmental pollution if not used wisely, this waste can be processed into fuel alternatives, in addition to the smoke from burning waste can be used as liquid smoke, as fertilizers and preservatives, both textile and food. This study aimed to determine the effect of time and temperature of the liquid smoke results from nut shells. Total sampel of research as 1500gr using pyrolysis method. Pyrolysis process is carried out at a temperature pyrolysis reactor 150-450oC. The production of liquid smoke from shell nut 1500gr by the method of pyrolysis produces liquid smoke grade 3 with the results of the best liquid at a temperature of 450oC and the optimum time of 2,5 hours at a yield of 32,66%. From the analysis using GC-MC spectrophotometer produces major chemical component of phenols(36,310%), acid(12,9475%) and carbonyl(16,715%).
STUDY OF CHANGES IN NICKEL CONTENT FROM EXPLORATION RESULTS WITH MINING ACTIVITIES AT PT. MINERAL BINTANG DELAPAN, MOROWALI DISTRICT Saputra, Apriadi; Alhabsyi, Gina Audina P; Bundang, Syarifullah; Botjing, Muslimin U; Lantapi, Adriansyah Wuriadin
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.9909

Abstract

In mining activities, there is often a discrepancy between the plan and actual conditions in the field. The purpose of this study is to determine the factors causing changes in Ni levels between exploration and mining activities. This study used drill sample data and mining samples using grab sampling (assay). From the results of the study, the Ni content value in exploration activities was 1.83% and in mining activities was 1.73% with a difference in content of 0.10%. The results of the difference in content are the influence of factors such as the heterogeneous nature of nickel, drilling activities, topographic conditions, mining methods, controlling factors for dilution, waste position to ore, reserve calculation methods, rainwater and human error.
Pengaruh Ukuran Butir Agregat Eps Modifikasi Terhadap Kuat Tekan Beton Ringan Yang Menggunakan Pasir Batu Apung Kusnadi, Kusnadi; Imran, Imran; Rauf, Iksan
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.9802

Abstract

Lightweight concrete using pumice sand and modified Eps waste needs to be continuously developed to produce construction materials that prioritize the use of local and environmentally friendly materials. This study aims to determine the effect of the grain size of modified Eps aggregate as coarse aggregate on the compressive strength of lightweight concrete using pumice sand as fine aggregate. The specimens in this study used concrete cylinders with a diameter of 100 mm and a height of 200 mm. The specimen was tested with a compression test at the age of 28 days. The test results showed that the larger the size of the modified Eps aggregate tended to increase the compressive strength value, but the size of the modified Eps aggregate that was too large reduced its density and had an impact on reducing the compressive strength of the concrete
RAFTER STRUCTURE ANALYSIS USING WEB-TAPERED STEEL MEMBERS WITH THE FINITE ELEMENT METHOD Astasya, Nita; Hamdi, Kamal
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.10215

Abstract

AbstractBuilding design using steel materials that generally use prismatic cross-sections can be modified with a modified cross-section with the aim of cutting costs. This research was conducted with the aim of modifying an existing structure of the building, which are in the form of a steel construction with prismatic members, to replace it with a modified web-tapered steel members. Design analysis is conducted based on the results of modeling output on SAP2000 and numerical analysis based on SNI standards and applicable AISC’s Steel Design Guide books. This paper will show the stages of analysis, calculation, section capacity, and the cross-sectional size of the design results of the structure.
ANALISIS FAKTOR PEMELIHARAAN BANGUNAN GEDUNG DAN PENGARUHNYA TERHADAP KENYAMANAN KEGIATAN PERKULIAHAN DI FAKULTAS TEKNIK UNIVERSITAS KHAIRUN Ahadian, Edward Rizky; Pengo, Filadelfia; Saputra, Muhammad Taufiq Yuda; Samudra, Annisa Rimadantia
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.9693

Abstract

Good and correct maintenance of building facilities and infrastructure is very important to ensure optimal service life. In the world of construction, building maintenance serves to maintain the sustainability of the function and condition of the building itself. The results of this maintenance effort will be felt by building users in the form of comfort while doing activities in it. Khairun University (Unkhair) located in Ternate City has various lecture buildings designed to provide comfort to students during the learning process. Every building that is built certainly requires maintenance so that it is maintained and can be used according to its function, so that students can carry out their activities comfortably. The purpose of this study is to measure how much influence building maintenance factors have on comfort in lecture activities at the Faculty of Engineering, Khairun University. In addition, this study also aims to identify the most dominant building maintenance factors that affect the comfort of students as building users in the faculty.Primary data was collected through questionnaire distribution to 242 students using random sampling method. While secondary data related to the number of respondents and other supporting information was obtained from literature and journal studies. Data processing was carried out using the Multiple Linear Regression Analysis method. The results of the study showed that the building maintenance component variable (X) simultaneously had a significant effect on the college comfort variable (Y) with a coefficient of determination of 0.557. This means that the building maintenance variable has an influence of 55.7% on college comfort, while the remaining 44.3% is influenced by other factors not revealed in this study. The most dominant building maintenance factor affecting student comfort is the maintenance of the water system, with a Beta value of 0.236.
ANALYSIS OF WATER QUALITY AND CAPACITY OF THE PEGIRIAN RIVER, SURABAYA USING THE QUAL2KW METHOD Fissuroyya, Verina Himmatuha; Setyowati, Rr Diah Nugraheni; Nengse, Sulistiya; Hakim, Abdul
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.10436

Abstract

Pegirian River is a tributary of the Kalimas River from Undaan street which empties into the Tambak Wedi sluice gate. The results of the BLH Surabaya laboratory analysis in 2015 showed that the BOD concentration in the Pegirian River throughout the year did not meet quality standards. This study intends to evaluate water quality based on physical, chemical and biological parameters applying the Qual2Kw model; to assess water quality status by applying data from STORET; and to determine the capacity of the Pegirian River. Samples were taken from four locations in the morning and evening with the parameters tested being temperature, TSS, pH, BOD, COD, DO, PO4, NH3, and E coli. Based on modeling with Qual2Kw, the quality of the Pegirian River in simulation 1 (existing) shows that the BOD, phosphate, amonia and E coli parameters have exceeded class IV river quality standards, thus indicating that the quality of the Pegirian River is polluted. For simulation 2 (prediction for 2029) only the BOD parameter exceeds class IV river quality standards. Simulations 3 (self purification) and 4 (capacity capacity) are still in line with class IV river quality standards for all parameters. The water quality status of the Pegirian River according to the STORET method obtained a total score of -47.75 which indicates a heavily polluted status. Pegirian River has a capacity for TSS, BOD, COD, phosphate, amonia and E coli parameters.
PEMODELAN GENANGAN BANJIR SUNGAI AKE TONIKU KECAMATAN JAILOLO SELATAN KABUPATEN HALMAHERA BARAT Kamis, Marlina Agus; Priambodo, Yudit Agus
Journal of Science and Engineering Vol 8, No 1 (2025): 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.v8i1.10620

Abstract

Abstrak Banjir yang terjadi di Kecamatan Jailolo Selatan, Kabupaten Halmahera Barat, Provinsi Maluku Utara, disebabkan oleh curah hujan dengan intensitas tinggi pada hari Jumat, 21 Maret 2025, yang mengakibatkan meluapnya Sungai Kayasa dan Sungai Toniku. Tujuan penelitian ini adalah untuk memodelkan kejadian banjir akibat luapan Sungai Ake Toniku, khususnya di Desa Tabadamai, Desa Toniku, dan Desa Rioribati, serta untuk menilai luas wilayah genangan banjir.Metode pemodelan banjir menggunakan pendekatan hidrolika untuk mensimulasikan debit sungai dengan perangkat lunak HEC-HMS, serta memvisualisasikan wilayah genangan banjir dan daerah terdampak menggunakan pendekatan berbasis GIS dengan perangkat lunak HEC-RAS. Hasil penelitian menunjukkan bahwa debit banjir rencana Sungai Ake Toniku untuk periode ulang 2, 5, 10, 25, 50, dan 100 tahun masing-masing adalah 50,5 m³/det, 105,8 m³/det, 152,9 m³/det, 223,9 m³/det, 284,9 m³/det, dan 352,6 m³/det. Luas genangan banjir yang sesuai untuk periode ulang tersebut masing-masing adalah 1,159 km², 1,474 km², 1,627 km², 1,920 km², 2,119 km², dan 2,360 km². Kedalaman banjir dikategorikan ke dalam rentang: (0–0,25)m; (0,25–0,5)m; (0,5–1,0)m; (1,0–2,0)m; dan (2,0–maksimum)m. Berdasarkan peta genangan banjir, Desa Toniku diidentifikasi sebagai wilayah yang paling parah terdampak, sedangkan Desa Tabadamai hanya sebagian terdampak pada skenario banjir periode ulang 100 tahun. Desa Rioribati tidak terdampak sama sekali pada model ini, karena luapan banjir hanya berasal dari Sungai Ake Toniku.Kata Kunci : Pemodelan banjir, analisis genangan, Sungai Ake Toniku
Identification of Drainage System Capacity using EPA-SWMM 5.2 Version Modeling in Bastiong Karance, Ternate City Alhadar, Nabila Islamaiya; Yakan, Annisa Fathi
Journal of Science and Engineering Vol 8, No 2 (2025): 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.v8i2.10743

Abstract

Flooding and waterlogging in Bastiong Karance, Ternate City, are recurring problems during heavy rainfall, primarily due to insufficient drainage capacity and high impervious land use. This study evaluates the performance of the existing drainage system through hydrological and hydraulic modeling using EPA-SWMM 5.2. Ten years of maximum daily rainfall data (2014–2024) were analyzed with Gumbel and Log Pearson Type III distributions to estimate design rainfall, while the Mononobe method was used to derive intensity-duration-frequency (IDF) curves. Field surveys provided drainage geometry, and topography data were obtained from Global Mapper. The study area was divided into seven Sub-Catchments, 13 junctions, 14 conduits, and two outfalls. Simulation results indicated that node JN3 experienced localized flooding for 0.09 hours with a peak discharge of 0.296 m³/s and total volume of 0.055×10⁶ liters. Conduits CN2, CN3, CN8, and CN12 experienced surcharge with exceedance durations of 0.01–0.26 hours. These findings highlight the limitations of the current drainage system in accommodating runoff during a 10-year return period storm. Recommended measures include widening critical conduits, constructing retention ponds, and implementing infiltration-based runoff reduction strategies to mitigate future flood risk.

Page 10 of 13 | Total Record : 126

 8   9   10   11   12 

Filter by Year

2018 2025


Reset
Filter By Issues
All Issue Vol 8, No 2 (2025): Journal of Science and Engineering (Josae) Vol 8, No 1 (2025): Journal of Science and Engineering (Josae) Vol 7, No 2 (2024): Journal of Science and Engineering (JOSAE) Vol 7, No 1 (2024): Journal Of Science And ENgineering (JOSAE) Vol 6, No 2 (2023): JOURNAL OF SCIENCE AND ENGINEERING (JOSAE) Vol 6, No 1 (2023): JOURNAL OF SCIENCE AND ENGINEERING (JOSAE) Vol 5, No 2 (2022): Journal Of Science And Engineering (JOSAE) Vol 5, No 1 (2022): Journal Of Science And Engineering (JOSAE) Vol 4, No 2 (2021): Journal Of Science And Engineering (JOSAE) Vol 4, No 1 (2021): Journal Of Science and Enggineering (JOSAE) Vol 3, No 2 (2020): Journal Of Science and Enggineering (JOSAE Vol 3, No 1 (2020): Journal Of Science and Enggineering (JOSAE) Vol 2, No 2 (2019): Journal Of Science and Enggineering (JOSAE) Vol 2, No 1 (2019): Journal Of Science and Enggineering (JOSAE) Vol 1, No 2 (2018): Journal Of Science and Enggineering (JOSAE) Vol 1, No 1 (2018): Journal Of Science and Enggineering (JOSAE) More Issue