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All Journal MUST: Journal of Mathematics Education, Science and Technology Jurnal Penamas Adi Buana Specta Journal of Technology Limits: Journal of Mathematics and Its Applications

Nashrul Millah

Institut Teknologi Kalimantan

Author-ID : 1820630

Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Environmental Science Mathematics

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Simulasi Pergerakan Tumpahan Minyak di Laut dengan Pengaruh Angin Nashrul Millah; Indira Anggriani; Kartika Nugraheni
SPECTA Journal of Technology Vol. 3 No. 3 (2019): SPECTA Journal of Technology
Publisher : LPPM ITK

As a petroleum-producing country, Indonesia has a very important role in supplying national and international petroleum needs. The distribution of oil by sea raises the risk of spills and harms the marine environment, especially for marine life. Most oil spills in the marine environment can form a thin layer on the surface due to the movement of wind, waves, and currents. In this study, the oil spill movement model used the Shallow Water Equation (SWE) model and the equation for the movement of oil spills. The SWE model consists of the equation of mass and momentum derived from the law of conservation of mass which is derived into the equation of continuity and the law of conservation of momentum which is derived into the equation of conservation of momentum. In this model, ocean currents are affected by several disturbances in the form of wind gusts and friction with the bottom. The model is solved numerically through simulation using the finite volume method. Discretization is done by using a staggered grid approach, where the mass and momentum variables are discretized in different cells. From the simulation results, it appears that the movement of oil spills is influenced by wind direction and current. The simulation results also found that the speed of the movement of oil spills has increased in the early times, but then gradually.

Penerapan Metode Fuzzy Tsukamoto untuk Mengidentifikasi Banjir Berdasarkan Curah Hujan dan Suhu di Kota Balikpapan pada Tahun 2015 sampai 2019 Ria Adha Sulistyowati; Nashrul Millah
SPECTA Journal of Technology Vol. 5 No. 2 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Flooding occurred in several areas in Balikpapan is still a big issue. Floods that occurred in several places in Balikpapan were basically caused by the unavailability of trenches and places to drain rainwater. This causes rainwater going straight down the road and creating a puddle. One way to anticipate the occurrence of floods is to know the conditions that trigger floods, which are rainfall and air temperature. For this reason, it is a necessary to create a classification system for the level of rainfall and air temperature that affect flooding. The method that can be used for this problem is fuzzy logic, specifically the Tsukamoto method. Tsukamoto method of fuzzy logic is one of the most frequently used methods for prediction. Therefore, method can be used to identify floods. Input variables used in this study are rainfall and temperature, while the output variable is flood or not flood.

Penerapan Regresi Cox Proportional Hazard pada Lama Masa Tunggu Alumni Institut Teknologi Kalimantan Mendapatkan Pekerjaan Shadrina Khairani Arinda; Primadina Hasanah; Nashrul Millah
SPECTA Journal of Technology Vol. 6 No. 2 (2022): SPECTA Journal of Technology
Publisher : LPPM ITK

Berdasarkan data survei angkata kerja yang dilakukan oleh Badan Pusat Statistik pada Februari 2020 diperoleh bahwa tingkat pengangguran lulusan sarjana di Indonesia tercatat sebesar 6,11%. Saat ini, lama masa tunggu alumi untuk mendapat pekerjaan telah menjadi salah satu indikator akreditasi Perguruan Tinggi. Oleh karena itu, melalui penelitian ini akan dianalisis faktor-faktor yang berpengaruh terhadap lama masa tunggu alumni mendapat pekerjaan. Data penelitian diambil dari data masa tunggu alumni Institut Teknologi Kalimantan (ITK) pada tahun kelulusan 2016-2019. Pada penelitian ini dilakukan analisis dengan pendekatan Regresi Cox Proportional Hazard. Variabel yang diduga berpengaruh pada lama masa tunggu alumni mendapatkan pekerjaan antara lain IPK, program studi, organisasi, jenis kelamin, serta kursus. Berdasarkan hasil analisis, didapatkan variabel yang berpengaruh terhadap lama alumni mendapatkan pekerjaan adalah variabel organisasi dan IPK. Model regresi terbaik yang didapatkan adalah hdimana variable merupakan variabel IPK dan merupakan variabel aktif organisasi. Interpretasi dari model regresi yang telah didapatkan adalah semakin tinggi IPK alumni, maka semakin besar kesempatan alumni untuk mendapatkan pekerjaan, jika kenaikan IPK alumni 0,1 satuan, maka akan meningkatkan kesempatan 1,0977 kali untuk mendapatkan pekerjaan, sedangkan untuk alumni yang aktif organisasi memiliki kesempatan 3,3387 kali lebih besar untuk mendapatkan pekerjaan dibandingkan alumni yang tidak aktif organisasi.

Co-Authors Adinda Rizki Kinanti Alfiniyah, Cicik Fitria, Irma Haniefa Atzzahra Indira Anggriani Irma Fitria Kartika Nugraheni kinanti, adinda rizki Primadina Hasanah Ria Adha Sulistyowati Shadrina Khairani Arinda

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