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All Journal PROZIMA (Productivity, Optimization and Manufacturing System Engineering) Jurnal Optimalisasi
Vania, Grace
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Control & Systems Engineering Industrial & Manufacturing Engineering

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Determination the Number and Schedule of Security Officers for Pandemic Period and Hybrid Learning at University: Penentuan Jumlah dan Jadwal Petugas Keamanan untuk Masa Pandemi dan Pembelajaran Hybrid di Universitas Heryanto, Rainisa Maini; Suhada, Kartika; Halim, Winda; Vania, Grace
PROZIMA (Productivity, Optimization and Manufacturing System Engineering) Vol. 7 No. 1 (2023): Juni
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/prozima.v7i1.1618

Abstract

The recovery condition after the Covid-19 pandemic in various sectors from the economic sector, education, and even tourism requires many adjustments in various factors. A university is an educational institution that applies the concept of online learning in pandemic conditions. Restrictions on activities carried out on campus have an influence on the workload of security officers. In this study, the number of security officers was determined during the pandemic and hybrid learning so as to minimize the costs that must be incurred by the university. Determining the number of security officers needed uses a workload analysis based on interviews and considers several factors such as the target level of environmental security, the wide coverage of the security area, and the workload of the security officers themselves. After knowing the number of security officers needed, then scheduling based on work shifts uses the Tibrewala, Philippe, and Brown algorithm so that the workload is evenly distributed. The results obtained show that during the pandemic 35 security officers are needed with an estimated allocation of IDR 156,103,200 per month and get a savings of IDR 84,287,500,- per month (35.1%). For hybrid learning, it takes 51 personnel with an estimated allocation of IDR 224,303,200,- per month. This cost increases by IDR 68.200.000,- per month (43.7%) of pandemic conditions. This research is expected to provide consideration for universities as one of the steps to make savings and be useful during the pandemic and hybrid learning.
Analisis Pengaruh Jenis dan Intensitas Suara Terhadap Kemampuan Memori Jangka Pendek, Tingkat Kantuk, dan Kecepatan Denyut Jantung Mahasiswa dalam Kegiatan Menghafal Vania, Grace; Soesilo, Novi; Sarvia, Elty
Jurnal Optimalisasi Vol 10, No 2 (2024): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v10i2.9262

Abstract

In the process of learning, having good memory skills is crucial for students. Several factors can affect memory, one of which is an external factor, sound. Sound distraction can disrupt concentration, speed up the pulse rate, and cause sleepiness, but on the other hand, it can also eliminate sleepiness. This research aims to analyze the effect of type and intensity of sound on college students' short-term memory abilities, sleepiness level, and heart rate, analyze the relationship between these variables, and provide suggestions for a conducive learning environment. This research was conducted in a laboratory using Task Short-Term Memory, the Stanford Sleepiness Scale, and an oximeter. The data collected will be processed using ANOVA and Pearson Correlation Tests. The results indicated that the type of sound (preferred music and crowd noise) and sound intensity (±50 dB and ±70 dB) do not affect short-term memory ability, sleepiness level, and heart rate. Furthermore, sleepiness level has a negative correlation with heart rate. Based on the findings, the optimal learning environment suggested for college students is music with a preferred intensity of ±50 dB. In contrast, the worst learning environment is a crowded environment, such as a café.
Co-Authors Elty Sarvia Kartika Suhada Rainisa Maini Heryanto Soesilo, Novi Winda Halim, Winda