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Agus Rachmad Purnama
Universitas Nahdlatul Ulama Sidoarjo
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Journal : Journal of Research and Technology

 1 
SEBARAN TIMBAL PADA TANAH DI AREAL PERSAWAHAN KABUPATEN SIDOARJO Fitrianah, Listin; Purnama, Agus Rachmad
Journal of Research and Technology Vol 5, No 2 (2019)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

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

Abstract

The existence of this industry in Sidoarjo has the negative potential impact to the environment, namely the accumulation of heavy metals in paddy fields. The magnitude of the impact that can be caused by the presence of lead heavy metals, research is needed that is expected to provide information related to the concentration and distribution of lead on land in Sidoarjo district. The distribution will later be elaborated by mapping using Geographic Information Systems. The purpose of this research is to identify the potential distribution of lead heavy metals in soil and soil in Sidoarjo paddy fields and the potential impact of lead accumulation on the environment. Samples taken were soil in the paddy fields, with 18 location points. The method used in the identification of lead distribution in paddy fields in Sidoarjo district is survey and laboratory testing, where the pattern of lead content distribution in paddy fields is carried out using spatial analysis with the spline with barrier method Arcgis 10.1. The highest distribution of lead content in paddy fields in Wonoayu District, 0.46 ppm. The highest dominant distribution pattern of lead pollution in paddy fields is Wonoayu and Waru sub-districts.
PENGIDENTIFIKASIAN SEGMENTASI PENGGUNA SISTEM MANAJEMEN PEMBELAJARAN SEBUAH UNIVERSITAS DENGAN METODE TWO-STEP CLUSTERING Purnama, Agus Rachmad; Larasati, Aisyah
Journal of Research and Technology Vol. 6 No. 1 (2020): JRT Volume 6 No 1 Jun 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (438.137 KB) | DOI: 10.55732/jrt.v6i1.147

Abstract

This study aims to identify user segmentations of a learning management system at Universitas Negeri Malang using two-step clustering method. Data is collected through an on-line survey which is linked onto the academic information systems. Total number of data are 10.594 responses. This study runs three clustering methods, two-step, k-means, and kohonen clustering, in order to identify the user segmentation. Two-step clustering methods performs better than the other two clustering methods (k-means and kohonen) based on silhouette clustering index. The number of cluster resulted from two-step clustering method are three clusters. The top three of most important factors in identifying the user segmentation are the benefit of the learning management usage in helping to access information, increasing the effectiveness of accomplishing assignments, and students satisfaction on the learning management system services.
Pola Sebaran Spasial Logam Berat Kadmium di Sungai Kawasan Industri Berbek Kabupaten Sidoarjo Fitrianah, Listin; Agus Rachmad Purnama
Journal of Research and Technology Vol. 7 No. 1 (2021): JRT Volume 7 No 1 Jun 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i1.306

Abstract

Berbek Industrial Estate is the largest industrial area in Sidoarjo Regency. Industrial activities have a positive and negative impact on the environment. One of the negative impacts on the environmental because of industrial activities is decreased water quality. The water quality around the Berbek industries suffers decreased water quality. This study aims to mapping and analysing the spatial distribution patterns of cadmium which are expected to provide information patterns in the area. The sample taken is river water in the area of ​​the Berbek Industrial, Waru District, Sidoarjo Regency. The methods used are surveys and laboratory tests. The distribution pattern of cadmium in the waters was carried out by spatial analysis used in ArcGis 10.1 Kriging Interpolation method. The highest cadmium concentration was found at the river location in Wedoro, namely 0.18 ppm, while the lowest cadmium concentration was found at the river location in Gedongan, namely 0.10 ppm. The patterns of cadmium spread in river area of ​​Berbek Industrial showed that cadmium which was came from Wedoro river was higher compared to other river spreads.  
Sebaran Timbal pada Tanah di Areal Persawahan Kabupaten Sidoarjo Fitrianah, Listin; Agus Rachmad Purnama
Journal of Research and Technology Vol. 5 No. 2 (2019): JRT Volume 5 No 2 Des 2019
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v5i2.307

Abstract

The existence of this industry in Sidoarjo has the negative potential impact to the environment, namely the accumulation of heavy metals in paddy fields. The magnitude of the impact that can be caused by the presence of lead heavy metals, research is needed that is expected to provide information related to the concentration and distribution of lead on land in Sidoarjo district. The distribution will later be elaborated by mapping using Geographic Information Systems. The purpose of this research is to identify the potential distribution of lead heavy metals in soil and soil in Sidoarjo paddy fields and the potential impact of lead accumulation on the environment. Samples taken were soil in the paddy fields, with 18 location points. The method used in the identification of lead distribution in paddy fields in Sidoarjo district is survey and laboratory testing, where the pattern of lead content distribution in paddy fields is carried out using spatial analysis with the spline with barrier method Arcgis 10.1. The highest distribution of lead content in paddy fields in Wonoayu District, 0.46 ppm. The highest dominant distribution pattern of lead pollution in paddy fields is Wonoayu and Waru sub-districts.  
Co-Authors Aisyah Larasati Akhmad Danang Nur Hidayat Alvin Ihyaul Nurman Andi Maulana Prabawa Assayyidatina Fatimah Diana Islamiyah Effendi Mohamad Fitri Nur Fadhilah Indrawan, Yogi Fradika Lily Oktavia Listin Fitrianah Machfudzil Asror Maulfi Ihza Mahrizal Zuhri Muchammad Tamyiz Nikmatus Sholikha, Nikmatus Ovelia Ikhsandra Nurcahya Putri Reza Prasetyo, Faris Taqwanur Yohana Ruth Wulan Natalia Susanto Zahrotul Azizah