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All Journal International Journal of Quantitative Research and Modeling In Search (Informatic, Science, Entrepreneur, Applied Art, Research, Humanism)
Sudradjat Supian
Unknown Affiliation
Arts Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Environmental Science Physics Other

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Numerical Modelling Techniques for Marine Debris : A Systematic Literature Review Subiyanto Subiyanto; Fenyawati Akhmad; Mohammad Fadhli Ahmad; Sudradjat Supian
International Journal of Quantitative Research and Modeling Vol 4, No 3 (2023)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v4i3.488

Abstract

Currently, marine debris (MD) is one of them the most worrying global environmental problems because high impact on ecosystems, human health, and economy. One type of MD is that plastics have a significant and growing component, comprising between 60 - 80% of MD globally. Numerical model is an amalgamation of a large number of mathematical equations that rely on computers to find approximate solutions to underlying physical problems. Numerical modeling is key to understanding and determining the source, trajectory and fate of marine plastic debris (MPD). The purpose of this study is to review several methods that have been used in marine debris tracking modeling. The method used in this study is the PRISMA Method and Bibliometric Analysis.
Penjadwalan Housekeepers Hotel Pada Era Pandemi COVID-19 dengan Pendekatan Goal Programming Yoga Sutisna; Monika Hidayanti; Sudradjat Supian
In Search (Informatic, Science, Entrepreneur, Applied Art, Research, Humanism) Vol 21 No 2 (2022): In Search
Publisher : LPPM UNIBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37278/insearch.v21i2.552

Abstract

Housekeepers have an important role in hotel operations because cleanliness and comfort are the attractions of hotels, especially during the COVID-19 pandemic era. However, during the pandemic, many hotel industries experienced a decrease in the value of the Room Occupancy Rate(TPK), which forced several hotels to closed, including the West Java region. This resulted in several employees being laid off including the Housekeepers, therefore the scheduling had to be rearranged so that there was no reduction in staff. This research is intended to determine the scheduling of Housekeepers with the Goal Programming approach in the era of COVID-19 pandemic case study at Hotel R Bandung City. The difference during the COVID-19 pandemic was in the different number Housekeepers because there was a reduction during the pandemic, so that it cloud increase the workload for other Housekeepers. This is evidenced by the results of scheduling using LINGO 11.0 software which is adjusted to the objective function to minimize deviations in constraint. From the results obtained, the difference in the number of working hours and holidays for Housekeepers before and after the COVID-19 pandemic however gas deviation equal to zero.
Co-Authors Fenyawati Akhmad Mohammad Fadhli Ahmad Monika Hidayanti Subiyanto Subiyanto Yoga Sutisna