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All Journal Jurnal Organisasi Dan Manajemen eProceedings of Engineering
Salim, Giovanni
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Social Sciences

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Does Black Monday appear on The Indonesia Stock Exchange? Asnawi, Said Kelana; Salim, Giovanni; Malik, Wahid Abdul
Jurnal Organisasi dan Manajemen Vol. 16 No. 1 (2020)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.647 KB) | DOI: 10.33830/jom.v16i1.780.2020

Abstract

Stock transactions are based on a daily transaction,where Monday begins more closed time than other days. For this reason, Monday is more volatile than other days. Findings. We find that a positive return opportunity larger (more than 60%) occurs on all trading days.This result indicates the potential for Investment in Indonesia Stock Exchange. We also found “Black Monday” in sectors 1 and 9, indicate Monday Lower Return and Volume compare other days. About 77% results Monday volume lower than other days. This shows Monday trading activity has not risen. This situation does not fit the hypothesis, where after the holiday weekend, investors are eager to invest. In this case, it means that at the weekend, more negative information, so that trade transactions have not increased. Regarding the correlation between (ρ) return(o-c) and return(c-c) it is found that almost all are significantly positive except in sector 4; 5; total and LQ 45. This positive correlation indicates that not much information flow entered when the market was closed.
Pengembangan Sistem Internet Of Things (IoT) Untuk Monitoring Dan Kontrol Tray Otomatis Pada Robot Pengantar Makanan Salim, Giovanni; Susanto, Erwin; Rodiana, Irham Mulkan
eProceedings of Engineering Vol. 12 No. 5 (2025): Oktober 2025
Publisher : eProceedings of Engineering

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Abstract

Pada abad ke-21, industri Food and Beverage (F&B)berkembang pesat dengan memanfaatkan teknologi robotikauntuk meningkatkan efisiensi layanan. Salah satu inovasi yangmulai banyak diterapkan adalah robot pengantar makanan,yang mampu menggantikan peran manusia dalam prosespengantaran guna meningkatkan keamanan, kebersihan, sertakonsistensi layanan. Meski demikian, pengembangan robot inimenghadapi sejumlah tantangan teknis, seperti penggunaantray statis dan perlindungan makanan yang kurang optimal,sehingga menurunkan kinerja sistem.Penelitian ini bertujuan mengembangkan sistemmekatronik pada robot pengantar makanan melalui trayotomatis yang lebih steril serta sistem navigasi yang akurat.Metode penelitian dilakukan dengan studi literatur,permodelan, simulasi menggunakan perangkat lunak desain,serta pengujian sensor dan aktuator. Sistem kontrol dibangunmenggunakan mikrokontroler Arduino Mega untukmekanisme tray dan Raspberry Pi untuk pergerakan robot,dilengkapi Internet of Things (IoT) melalui aplikasi Kodularsebagai sarana monitoring.Hasil pengujian menunjukkan penerapan kontrol PIDmampu menghasilkan pergerakan tray yang stabil dan presisi,dengan rata-rata error sebesar 2,66% pada jarak 27,5 cm dan3,21% pada jarak 8,5 cm. Hal ini membuktikan sistem memilikiakurasi tinggi, minim osilasi, serta overshoot rendah.Kehadiran tray otomatis berbasis IoT menjadikan robot lebihinovatif, efisien, dan memberikan kenyamanan bagipengguna.Kata kunci: efisiensi layanan, IoT, robot pengantarmakanan, tray, sistem mekatronik
Co-Authors Erwin Susanto Irham Mulkan Rodiana Malik, Wahid Abdul Said Kelana Asnawi