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All Journal Abdimas Natural B Jurnal Sistem Informasi dan Ilmu Komputer
Khumaedi Khumaedi
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Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Environmental Science Social Sciences

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Application of 3D Resistivity Method for Distribution of Seawater Intrusion in The Tanah Mas Residential North Semarang Andya Satya Purnomo Putro; Supriyadi Supriyadi; Khumaedi Khumaedi
Natural B, Journal of Health and Environmental Sciences Vol 3, No 4 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (916.076 KB) | DOI: 10.21776/ub.natural-b.2016.003.04.5

Abstract

The seawater intrusion into the groundwater in Tanah Mas residential North Semarang was investigated by chlorides ion levels from production wells and  3D electrical resistivity profiling. Tanah Mas residential area is a densely populated area located in the northern coastal city of Semarang. At the area, the exploitation of groundwater through production wells is quite high, that potential to produce the phenomenon of seawater intrusion. Analysis of groundwater samples from production wells was carried out as an early indication of the seawater intrusion in the study area. The profiles acquired across the study area, using a multi-electrodes acquisition system in a Wenner array configuration by electrode spacing of 10 m were used for the profiling. The results of groundwater chemical testing, there are three groundwater samples that has high levels of chloride ions. Three groundwater samples have the high levels of chloride ions that are in wells F, J and M. Apparent resistivity data of the 2D profiles over the models were collated to  3D data sets for each array studied. From  3D electrical resistivity profiling, obtained the distribution of seawater intrusion that has reached the north, east and south of Tanah Mas residential.
EDUKASI FENOMENA AMBLESAN-INTRUSI AIR LAUT DAN PENANGGULANGANNYA DI SEMARANG UTARA Supriyadi Supriyadi; Khumaedi Khumaedi
Jurnal Abdimas Vol 20, No 1 (2016): June 2016
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v20i1.7651

Abstract

Telah dilaksanakan kegiatan kepada masyarakat berupa edukasi fenomena amblesan intrusi air laut dan penanggulangannya di Semarang utara. Latar belakang kegiatan ini adalah untuk memberikan pemahaman kepada masyarakat mengenai fenomena amblesan intrusi air laut dan upaya yang dilakukan untuk menanggulangi fenomena tersebut. Fenomena amblesan intrusi air laut ini diakibatkan pengambilan air tanah yang berlebihan sehingga lapisan tanah menjadi turun serta naiknya muka air laut yang dapat menyebaban air tanah terkontaminasi air laut sehingga menjadi air payau. Untuk mengatasi masalah tersebut dilakukan kegiatan sosialisasi kepada masyarakat melalui kegiatan memberikan pemahaman terhadap masyarakat dalam bentuk pengenalan materi, diskusi dan pelatihan tentang cara-cara mngetasi amblesan dan intrusi air laut. Hasil yang diperoleh menunjukkan bahwa pada umumnya masyarakat mengenal fenomena amblesan dan intrusi air laut hanya sebatas pengalaman sehari-hari dan terkesan sudah terbiasa dengan fenomena tersebut. Sosialisai dan pelatihan dengan menerapkan teknologi tepat guna yang berkesinambungan perlu dilakukan untuk mengatasi fenomena amblesan intrusi air laut.
Peningkatan Keamanan Data dengan Kriptografi Modern pada Sistem Operasi Rakhmadi Rahman; Khumaedi Khumaedi; Nugrah Surya Pratama
Jurnal Sistem Informasi dan Ilmu Komputer Vol. 2 No. 4 (2024): November : Jurnal Sistem Informasi dan Ilmu Komputer
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/jusiik-widyakarya.v2i3.3995

Abstract

In the current digital era, data security is a top priority for individuals, organizations, and businesses. Data is considered a valuable asset that needs to be protected from various security threats, especially in operating systems where data is stored (data at rest) and transmitted (data in motion) through networks. This research aims to enhance data security by implementing modern cryptographic methods. The cryptographic methods used include RC4, AES, and WPA3. Penetration testing is conducted to evaluate the effectiveness and efficiency of each cryptographic method. The research results show that the implementation of modern cryptography provides an additional layer of security against security threats to data in motion and data at rest within the operating system.
Co-Authors Andya Satya Purnomo Putro Nugrah Surya Pratama Rakhmadi Rahman Supriyadi Supriyadi