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All Journal Jurnal Masyarakat Informatika Jurnal Agro Estate
Imam Ramadhan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Environmental Science

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ISOLASI DAN UJI POTENSI BAKTERI PELARUT FOSFAT DARI LAHAN PERKEBUNAN KELAPA SAWIT (Elaeis guineensis Jacq.) Mariani Sembiring; Imam Ramadhan; Tioner Purba
Jurnal Agro Estate Vol 4 No 1 (2020): Juni 2020
Publisher : Institut Teknologi Sawit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.976 KB) | DOI: 10.47199/jae.v4i1.128

Abstract

Phosphate solubilizing bacteria has high potential in dissolving P bound into P available in the soil, the mechanism of dissolving P related to the activity of the microbes concerned in producing enzymes and organic acids. This research aims were to determine the type and ability of bacteria that can dissolve P. This research was conducted at the Soil Biology Laboratory, Faculty of Agriculture, University of Sumatera Utara (USU) in January-June 2019. The observed parameters were the population of phosphate solubilizing microorganisms, potential test on solid media from several P sources, analysis of organic acids using the High-Performance Liquid Chromatography (HPLC) method, identification of bacteria by Polymerase Chain Reaction Sequences (PCR-Sequence). The analysis results indicated that the microbes which had the highest ability to dissolve P and produce organic acids were isolates with B1 code and the results of PCR-Sequence identification of B1 isolates were Burkholderia sp strain IBP-VNS5.
Infrastruktur High-Available Learning Management System Universitas Menggunakan Least-Connected Load Balancer Imam Ramadhan; Lily Wulandari
Jurnal Masyarakat Informatika Vol 13, No 2 (2022): JURNAL MASYARAKAT INFORMATIKA
Publisher : Department of Informatics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmasif.13.2.49176

Abstract

Pandemi membuat civitas akademik IPB University untuk melakukan kegiatan belajar mengajar jarak jauh. Namun, berjalannya Learning Management System (LMS) belum cukup untuk melayani permintaan ribuan pengguna tanpa kesalahan sistem mau pun kesalahan fisik. Untuk mewujudkan konsep high-availability pada server esensial seperti LMS, diperlukan perencanaan skema sistem server yang matang. Penelitian ini mengimplementasikan konsep high-availability pada server LMS terdistribusi dengan menggunakan load balancing, web clustering, dan juga database clustering. Implementasi menggunakan serangkaian server basis data, server web, server NFS, server load balancing web, dan juga server load balancing basis data. Sistem terimplementasi telah diuji berdasarkan kebutuhan fungsional yang sesuai. Pengujian yang dilakukan ditinjau dari pengamatan terhadap waktu respon dan juga performa LMS. Hasil pengujian menunjukkan bahwa LMS telah mengaplikasikan konsep high-availability ketika terjadi suatu kesalahan pada salah satu server web. Pengujian juga menunjukkan bahwa kinerja server web telah seimbang menggunakan least-connected load balancer. Ketika salah satu server web tidak dapat diakses, maka server web yang lain mengambil request client sehingga sistem tetap dapat berjalan.
Co-Authors Lily Wulandari Mariani sembiring Tioner Purba