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All Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Hasi Penelitian Dan Pengkajian Ilmiah Eksakta - JPPIE
Kusdianto .
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Pengaruh Sudut Masuk Impeller Terhadap Pola Alir Dalam Reaktor Biogas dengan Side Entering Mixer Mochammad Murtadho; Yukh Ihsana; Ni’am Nisbatul Fathonah; Sugeng Winardi; Tantular Nurtono; Kusdianto .
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Side-entering impeller is widely used in the biogas plant. Liquid effluent is processed anaerobically in a hugetank with a relatively small impeller-to-tank diameter ratio.The purpose of this research is to study the sideeffects of entering angle against the flow characteristics in a stirred tank with side-entering mixers (SEM)using flow visualization techniques. This work was conducted on the tank cylinder with a diameter of 40 cmand 40 cm high liquid. Impeller 3-blade propeller which made from stainless steel with 3 and 4 cm indiameter. Variable speed rotary impeller used is 100 to 400 rpm. Side entry angle used are 5 °, 10 °, and 15 °right and left side.Visualization techniques used in this research, specifically focus on the light liquid layervertically and horizontally desired then photographed with a DSLR camera and observation in order tocharacterize the flow pattern. In the type of impeller propeller with an increase in rotational speed, thegeneral layout circulation flow getting to the top is almost half of the liquid level. The changes of side entryangle does not really give much influence over the location of the circulation flow that occurs in the tank.
Sistem Pendukung Keputusan dengan Metode Simple Additive Weighting (SAW) Untuk Evaluasi Karyawan di PT. SJAL Silaut Febriyanno Suryana; Kusdianto .
Jurnal Penelitian Dan Pengkajian Ilmiah Eksakta Vol 5 No 1 (2026): Jurnal Hasi Penelitian Dan Pengkajian Ilmiah Eksakta - JPPIE
Publisher : LPPM Universitas Dharma Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jppie.v5i1.2454

Abstract

The use of information technology to support work activities has become an essential requirement to achieve effective and efficient performance. Human limitations in processing highly complex data are a key reason why technology has become a primary alternative solution. This study aims to develop a web-based Decision Support System (DSS) to assist in the evaluation of the best employees at PT SJAL. Previously, the evaluation process was conducted manually, which often led to issues such as subjectivity in assessment, time inefficiency, and suboptimal data management. The proposed system is designed to provide a more objective, accurate, and efficient solution by applying the Simple Additive Weighting (SAW) method. The SAW method was selected due to its ability to handle multi-criteria decision-making in a simple and effective manner through weighted summation of each alternative based on predetermined criteria. The criteria used in this study include discipline, work quality, attendance, teamwork, and initiative. The system implementation was developed using the PHP programming language and a MySQL database. The development stages consist of literature review, data collection, requirements analysis, system design using UML, implementation, and system testing. The results indicate that the system is capable of accelerating the evaluation process, improving accuracy, and generating more objective and measurable employee evaluation recommendations. Therefore, the application of the SAW method is expected to serve as an effective decision support tool for the management of PT SJAL in determining the best employees.
Co-Authors Febriyanno Suryana Mochammad Murtadho Ni’am Nisbatul Fathonah Sugeng Winardi Tantular Nurtono Yukh Ihsana