Article Per Year (5 Year)
p-Index From 2020 - 2025
2.177
P-Index
This Author published in this journals
All Journal PROSIDING SEMINAR KIMIA Jurnal Teknik Sipil AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Community Development Journal: Jurnal Pengabdian Masyarakat Progressive Physics Journal Ilmu Perikanan Tropis Nusantara Geosains Kutai Basin
Idris Mandang, Idris
Jurusan Fisika Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Mulawarman
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Health Professions Materials Science & Nanotechnology Physics Public Health Social Sciences

Published : 18 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 18 Documents
Search

 1   2 
Sosialisasi Dan Pelatihan Manajemen Keselamatan Dan Kesehatan Kerja Laboratorium Bagi Guru-Guru SMA Dari Kota Samarinda Dan Tenggarong nugroho, Rudy agung; Subagyono, RR Dirgarini Julia; Lepong, Piter; Mandang, Idris
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 2, No 1 (2018)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.37 KB) | DOI: 10.21831/jpmmp.v2i1.16152

Abstract

Merujuk pada Undang-Undang No. 1 tahun 1970 tentang Keselamatan dan Kesehatan Kerja (K3), laboratorium sebagai sarana pendidikan mempunyai resiko sebagai tempat terjadinya gangguan pada K3. Oleh karena itu perlu adanya pengetahuan yang mendalam mengenai Manajemen K3 bagi guru-guru SMA pengelola laboratorium. Program pengabdian pada masyarakat yang berjudul sosialisasi dan pelatihan manajemen K3 laboratorium bagi 27 guru SMA kota Samarinda dan Tenggarong telah berlangsung untuk meningkatkan pengetahuan manajemen K3 di laboratorium. Program dilaksanakan dengan metode 25% teori; 75% praktek Manajemen K3, penilaian resiko, identifikasi bahaya dan penyusunan draft standard operational procedure (SOP) K3, Cardiopulmonary resuscitation (CPR), Pertolongan pertama pada kecelakaan (P3K) dan bahaya psikososial bertempat di FMIPA Universitas Mulawarman. Hasil yang diperoleh (berdasarkan angket evaluasi) adalah 97% peserta menyatakan peningkatan pengetahuan tentang manajemen K3, penilaian resiko serta identifikasi bahaya, SOP K3, CPR, P3K dan adanya bahaya psikososial di lingkungan laboratorium SMA.
PENGARUH VARIASI DOSIS KOAGULAN TERHADAP PERUBAHAN PARAMETER FISIKA – KIMIA KUALITAS AIR BAKU (Studi Kasus : PDAM Kota Samarinda) Ali Murtopo; Aman Sentosa Panggabean; Idris Mandang
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2013
Publisher : PROSIDING SEMINAR KIMIA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research was conducted with the aim of obtained the physical – chemical parameter change water quality caused by the coagulant dose variant. Issues raised in this study is a variation of the added coagulant dose on each raw water samples with dose of 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 ml. Raw water is obtained from Cendana Intake as much as 6 samples, and then the other raw water is obtained from Palaran Intake as much as 6 samples. Of each raw water sample obtained reported on the weather conditions, and ebb & flow river conditions at the time of data collect. Obtained data analyzed using anova test to find out the availability of influence resulting from coagulant dose variant : (a) Raw water turbidity parameter with a value F cal 33,61 and F table 1,82 (0,05), 2,32(0,01). Raw water color parameter with a value F cal 32,15 dan F table 1,82 (0,05), 2,32(0,01). Raw water pH parameter with a value F cal 260 dan F table 1,82 (0,05), 2,32(0,01). F cal value > F table value at all anova test for each parameter indicates that coagulant additions greatly affect turbidity and color parameters change derived raw water suitable standard PERMENKES/No.492/PER IV/2010 about drink water (turbidity 5 NTU and color 15 PtCo). While the addition of coagulant in the raw water will lower the pH of the water, up to add lime or soda ash to raise the pH. In total all raw water samples with turbidity 30 – 80 ppm each matching derived optimal dose distribution average as big 20 – 35 ppm.
Rancang Bangun Sistem Monitoring Suhu dan Salinias pada Air Laut Azizah Bella Azizah Bella; Devina Rayzy Perwitasari Sutaji Putri; Idris Mandang
Progressive Physics Journal Vol 2 No 1 (2021): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (507.198 KB) | DOI: 10.30872/ppj.v2i1.767

Abstract

Knowing the condition of the waters is very important for the sustainability of aquatic ecosystems. The condition of the waters so as not to have a bad impact on aquatic ecosystems can be known through temperature and salinity parameters. Seawater temperature is the distribution of heat in the ocean caused by the movement of water and other factors. The salinity of seawater is the level of saltiness or the level of salt dissolved in seawater. Temperature can be measured using a thermometer and salinity is measured using a refractometer. However, using these tools requires time, effort, cost, and manual data retrieval processes. Therefore, this research aims to make a temperature and salinity measuring instrument and determine the relationship between Voltage and salinity in the seawater. This research used the method of measuring electrical conductivity (DHL) to determine a change in magnitude. The temperature and salinity design consisted of an Arduino Uno, a YL-38 Module, and copper as an electrode, and a DS18B20 Temperature Sensor. the result of this research shows that has been done, the average error presentation of salinity is 0.00732% and temperature is 0.044 %. Through this research, salinity and the temperature instrument produced using electrodes made of copper and DS18B20 which operate at a Voltage of 4,8 Volts. The obtained a linear graph between stress and salinity. The relationship between voltage and salinity is directly proportional, the higher the salinity of seawater, the greater the output voltage.
Pengaruh El Nino Southern Oscillation (ENSO) Terhadap Debit Sungai Mahakam Kalimantan Timur Rahmiati, Rahmiati; Mandang, Idris
GEOSAINS KUTAI BASIN Vol 5 No 2 (2022)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v5i2.1064

Abstract

El Nino Southern Oscillation (ENSO) merupakan fenomena laut-atmosfer yang berdampak terhadap perubahan iklim di seluruh dunia termasuk Indonesia. Southern Oscillation Index (SOI) merupakan salah satu indikator dari ENSO. SOI memberikan gambaran kejadian El Nino atau La Nina di Samudra Pasifik. SOI dihitung menggunakan perbedaan tekanan antara Tahiti dan Darwin. Fase El Nino berada pada nilai SOI dibawah -7 dan La Nina berada pada nilai SOI di atas dari +7 [1]. Tujuan penelitian ini adalah untuk melihat pengaruh ENSO terhadap debit Sungai Mahakam di Kalimantan Timur menggunakan analisis Korelasi Pearson (Pearson Product-Moment Correlation). Data yang digunakan merupakan data yang diperoleh dari 4 stasiun pengamatan mulai dari tahun 2008 sampai tahun 2012. Analisis korelasi dibagi menjadi lag 0, lag 1, lag 2 dan lag 3. Hasilnya menunjukkan bahwa pada lag 0 diperoleh korelasi positif yang hampir semua stasiun nilai koefisien korelasinya (r) lebih besar dari 0,3 (korelasi sedang). Pada lag ini hanya satu stasiun yang nilai r nya di bawah 0,3. Pada lag 1 terjadi korelasi positif dan negative yang kebanyakan berkorelasi lemah dengan nilai -0.07 ≤ r ≤0.23. Hanya ada satu stasiun yang berkorelasi sedang dengan nilai r lebih dari 0,3. Pada lag 2 dan lag 3 semua stasiun berkorelasi lemah dengan nilai -0.3 ≤ r ≤ 0.17. Dari hasil tersebut dapat terlihat bahwa korelasi tertinggi adalah korelasi sedang dengan korelasi positif yang terjadi pada lag 0 sehingga dapat disimpulkan bahwa kejadian ENSO berdampak langsung terhadap debit Sungai Mahakam meskipun pengaruhnya tidak terlalu besar. Dari hasil juga mengindikasikan bahwa ketika kondisi El Nino maka debit sungai akan menurun dan akan meningkat ketika kondisi La Nina
Studi Identifikasi Sebaran Ion Logam Pb, Cu, As dan Cd pada Air dan Sedimen di Perairan Bontang Kalimantan Timur Menggunakan Metode Kriging (Ordinary Kriging) ani, ani ani; Wahidah, Wahidah; Mandang, Idris
GEOSAINS KUTAI BASIN Vol 6 No 1 (2023)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v6i1.1001

Abstract

Bontang is one of the cities in East Kalimantan which is geographically located in coastal areas so that it is very vulnerable to marine pollution both from domestic human and industrial activities. This study aims to determine the level and pattern of distribution of poluton metal ions Pb, Cu, As and Cd in water and sediments in Bontang waters using the Kriging (Ordinary Kriging) method. In this study, 4 observation samples were used which were tested in the laboratory to determine the content of heavy metals. Furthermore, the data from laboratory tests along with 4 secondary data were interpolated using the ordinary kriging method with an exponential model to determine the pattern of contour distribution in Bontang waters. The results showed that the heavy metal with the highest distribution value in water and sediment is cadmium with a susceptibility value ranging from 0.006 mg/l to 9.070 mg/l. In general, the pattern of spread of heavy metals originates from coastal areas in a southeasterly direction. The most influential thing on this pattern of spread is tidal currents and bathymetry.
ANALISIS VARIABILITAS SPASIAL DAN TEMPORAL KONSENTRASI NITRAT DI LAUT HALMAHERA DAN LAUT BANDA MENGGUNAKAN METODE EMPIRICAL ORTHOGONAL FUNCTION (EOF) Sihotang, Zetsaona; Mandang, Idris; Munir, Rahmawati
GEOSAINS KUTAI BASIN Vol. 1 No. 1 (2018)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v1i1.163

Abstract

The East Indonesian ocean water is highly complex waters where it has become the passage of water masses from Pacific Ocean to Indian Ocean. Halmahera Sea and Banda Sea has an important role as one of the global ocean current trajectory from Pacific Ocean to Indian Ocean. The movement of water masses that occuring in this region has affect the condition and its fertility. One of the nutrients that affect the process of the growth of the pythoplankton and other microorganism is nitrate and it has become one of the indicators of waters fertility. This research aims to find out the effect of temperature and salinity on the change of nitrate concentration using Empirical Orthogonal Function (EOF) method. This method is used to separate the spatial and temporal data linkage in order to obtain the dominant spatial and temporal patterns. The data that used for the analysis was obtained from the output of the HYCOM (Hybrid Coordinate Ocean Model) model + NCODA Global 1/12º Reanalysis. The result of the analysis showing that the nitrate concentration was highly sensitive on the change of temperature in the ocean specifically in the Banda Sea region. The nitrate concentration increased during the East Monsoon where the sea surface temperatures dropped to 25ºC. In the West Monsoon, the sea surface temperature is warmer than usual so that the Banda Sea has a low nitrate concentration. In other hand, salinity did not show a significant effect on changes of nitrate concentration in the region of the Banda Sea and Halmahera Sea.
Penentuan Status Mutu Air Laut Menggunakan Metode Indeks Pencemaran di Perairan Bontang Kalimantan Timur Khairunnisa, Nia; Mandang, Idris; Munir, Rahmiati
GEOSAINS KUTAI BASIN Vol. 7 No. 1 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i1.955

Abstract

Bontang City is a coastal city in East Kalimantan, directly bordering the Makassar Strait, with numerous residential, industrial, and trade areas along its coastline. These activities can impact the decline in seawater quality in Bontang City's coastal waters. The decrease in seawater quality will diminish the usability, productivity, and capacity of aquatic resources, ultimately reducing the wealth of natural resources. The high human activity along Bontang's coast is feared to cause seawater pollution, affecting the management of seawater quality now and in the future. This research aims to determine the quality status of seawater in Bontang waters using the Pollution Index (IP) method. Water quality sampling took place in September 2021 at 8 research stations and was analyzed at Mulawarman University's Water Quality Laboratory. The results were then compared with seawater quality standards based on Government Regulation No. 22 of 2021. The research findings categorize the seawater quality status in Bontang waters using the Pollution Index (IP) method as lightly polluted at all observation stations, with a range of values 1 > IP > 5. Parameters contributing to this condition are PO4-P and DO that do not meet quality standards. Parameters in accordance with quality standards for marine and port tourism include temperature, salinity, pH, BOD5, NO3N, and NH3-N. The increase in parameters exceeding the maximum quality standards comes from natural sources and industrial waste from high community activities
Studi karakteristik Sedimen di Estuari Delta Mahakam Kalimantan Timur Anggara, Geogy; Mandang, Idris; Munir, Rahmiati
GEOSAINS KUTAI BASIN Vol 4 No 1 (2021)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v4i1.460

Abstract

The Mahakam Delta has complex characteristics. It has river branches to connect directly in the Makassar Strait. River discharge carries sediments from upstream to the high-salinity water in Estuary which causes mixing. The purposes of this study are to determine the characteristics of sediments and to know the pattern of sediment distribution in the Estuary of Mahakam Delta. The value of the manual processing of sediments become the initial value in modeling the pattern of sediment distribution using ECOMSED model. The model is run for 40 days (07 July - 16 August 2019). Discharge and tidal also use in the running data. The results of manual processing show the characteristics of muddy sediments with an average of 0.002 mm. The simulation results show that the pattern of sediment distribution carried by surface currents. The highest of sediment concentration when the high tide is on the Estuary and on offshore when the low tide. Keywords: The Mahakam Delta, Sediment, Distribution pattern, Sediment Characteristics
IDENTIFIKASI ZONA PROSPEK RESERVOAR BERDASARKAN DATA SEISMIK PADA LAPANGAN BOONSVILLE FORT WORTH BASIN TEXAS UNITED STATES OF AMERICA Musyaffa, Nur Rafif; Mandang, Idris; Rahmiati, Rahmiati
GEOSAINS KUTAI BASIN Vol 4 No 1 (2021)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v4i1.690

Abstract

The aim of the research is to identify reservoir prospect zone in Caddo and Vineyard zone at Boonsville field, Fort Worth Basin, Texas, United States of America. In this research used 3D PSTM (Post Stack Time Migration) reflection seismic data and BY18D borehole data. Data processing of seismic inversion obtained Acoustic Impedance (AI) value. Well logging data obtained effective porosity (PHIE) value. From analysis, the results of reservoir zonation obtained on Caddo and Vineyard zone. Distribution of reservoir prospect zone in BY18D can be seen from depth marker data in 4735-5740 feet depth. After zonation process was conducted, effective porosity value (PHIE) was obtained. Analysis from well logging In Caddo zone, 12% porosity value obtained in 4735-4830 feet depth. In Vineyard zone, 13% porosity value obtained in 5647-5740 feet depth. The Results of the study is obtained effective porosity (PHIE) with moderate value. Afterward, in seismic inversion data processing, range of Acoustic Impedance value was obtained. In Caddo zone, the range is 37500-42500 (m/s)*(gr/cc). In Vineyard zone, the range is 35000-42500(m/s)*(gr/cc). The results describe high value of acoustic impedance seismic analysis results, it shows the high acoustic impedance value distribution, that indicated a moderate effective porosity (PHIE) value distribution.
PERUBAHAN PENUTUPAN LAHAN BERDASARKAN ANALISIS CITRA DIGITAL DI DAERAH ALIRAN SUNGAI MAHAKAM Prasetyo, Mohammad Aji; Mandang, Idris; Mubarrok, Saat
GEOSAINS KUTAI BASIN Vol 2 No 1 (2019)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v2i1.335

Abstract

This study aims to analyze the land cover in the Mahakam watershed, East Kalimantan in years of 2003 and 2015 by using data satellite LANDSAT ETM+ image and LANDSAT OLI / TIRS with spatial resolution 30 m. The method used is the initial processing of the image, visual image interpretation, field observations, the determination of sample area, supervised classification using the maximum likelihood method, analysis of accuracy test, reclassification, and analysis of land cover change. Land cover of Mahakam watershed can be classified into 5 type of land cover, namely vegetation, fishpond, settlements, open land and watershed. In 2003, the vegetation area in the Mahakam watershed reached 1.135.629 ha and up to 1.139.318 ha or about 0,53 % in 2015. At the same time, the class of settlement increased from 11.823 ha in 2003 to 79.303 ha in 2015. The land cover of watershed also increased by 6,78 %, from 110.969 ha increasing to 222.560 ha. Open land area has decreased of around 9,77 % or 160.807 ha converted to watershed, vegetation, and settlement.Type of land cover mining has decreased in the period 2003-2015, amounting to 29.177 ha or 1,77 %. Which is converted to vegetation and open land. It shows that land cover change in Mahakam watershed is dominated by open land that is used by the community as settlements, plantations and others.
Co-Authors Ahmad Zarkasi Ali Murtopo Aman Sentosa Panggabean Anggara, Geogy ani, ani ani Arifin, Muhammad Syahrul Azizah Bella Azizah Bella Devina Rayzy Perwitasari Sutaji Putri Fachrudy, Muhammad Adi Hamdhani, Hamdhani Henny Pagoray, Henny Khairunnisa, Nia Kurniawan, Burhan Lepong, Piter Mislan Mubarrok, Saat Muhammad Riza Munir, Rahmawati Munir, Rahmiati Musyaffa, Nur Rafif Nanda Khoirunisa, Nanda Napitupulu, Gandhi Nur, Ashadi Arifin Perwitasari, Devina Rayzy Prasetyo, Mohammad Aji Qori Fajar Hermawan Rahmiati Rahmiati Rezky, Bayu Rizqi, Puteri Buana Romawan, Francis Seravino Rudy Agung Nugroho Saibun Sitorus Samsul Rizal Subagyono, RR Dirgarini Julia Totok Suprijo Wahidah Wahidah Yusuf, Mustaid Zetsaona Sihotang