Judul: The Relationship between stock price index and  interest rates in ASEAN-5 countries before and during the Covid-19 pandemic
Abstrak: Pandemi Covid-19 adalah fenomena yang terjadi pada akhir tahun 2019, Covid-19 memiliki dampak tidak hanya bagi kesehatan juga berdampak pada keadaan ekonomi suatu negara. Hal tersebut juga berpengaruh terhadap tingkat suku bunga dan indeks harga saham pada negara ASEAN-5. Tujuan dari penelitian ini adalah untuk menganalisis hubungan tingkat suku bunga dan ineks harga saham di negara ASEAN-5 pada masa sebelum dan saat pandemi Covid-19. Penelitian ini menggunakan metode deskriptif dan kuantitatif dengan menggunakan analisis VARX (Vector Autoregressive with Exogenous). Hasil dari penelitian ini yaitu pada masa sebelum pandemi Covid-19 indeks harga saham negara ASEAN-5 cenderung stabil dikarenakan kebijakan moneter yang eketif melalui suku bunga, namun pada masa pandemi Covid-19 suku bunga tidak berpengaruh secara signifika terhadap indeks harga saham, hal tersebut dikarenakan tingginya sentimen negatif investor terhadap indeks harga saham saat pandemi Covid-19. Berdasarkan interpretasi IRF exogenous, indeks harga saham dan suku bunga negara ASEAN-5 masih berfluktuatif dengan adanya guncangan penambahan kasus Covid-19. Hal tersebut menunjukkan bahwa ekonomi negara ASEAN-5 masih rentan terhadap guncangan pandemi Covid-19., The Covid-19 pandemic is a phenomenon that occurred at the end of 2019. Covid-19 has an impact not only on health but also on the economic state of a country. This also affects interest rates and stock price indexes in ASEAN-5 countries. The purpose of this study was to analyze the relationship between interest rates and stock price indexes in ASEAN-5 countries before and during the Covid-19 pandemic. This study used descriptive and quantitative methods using VARX (Vector Autoregressive with Exogenous) analysis. The results of this study in the period before the Covid-19 pandemic the stock price index of ASEAN-5 countries tended to be stable due to effective monetary policy through interest rates, but during the Covid-19 pandemic interest rates did not significantly affect the stock price index, it was due to high negative investor sentiment towards the stock price index during the Covid-19 pandemic. Based on the IRF exogenous interpretation, the stock price index and interst rate of ASEAN-5 are still fluctuating whit their shock of Covid-19 cases. This shows that the ASEAN-5 economies are still vulnerable to the shocks of the Covid-19 pandemic.
Keyword: ASEAN-5, Covid-19, interest rate, stock price index, VARX, ASEAN-5, Covid-19, interest rate, stock price index, VARX

Judul: Analisis Stabilitas Nilai tukar di Negara ASEAN-5 Sebelum dan Saat Pandemi Covid-19
Abstrak: Covid-19 merupakan salah satu wabah penyakit yang memiliki pengaruh terhadap ekonomi ASEAN-5 terutama pada nilai tukar. Nilai tukar adalah salah satu alat yang digunakan untuk melakukan transaksi keuangan antar negara. Apabila nilai tukar bergejolak akan memengaruhi ekonomi suatu negara terutama dalam perdagangan internasional. Faktor-faktor yang memengaruhi nilai tukar dapat dari segi ekonomi maupun non ekonomi. Dari segi ekonomi nilai tukar dipengaruhi oleh inflasi, ekspor dan impor, serta lainnya. Sedangkan faktor non ekonomi dilihat dari politik, pandemi, dan lainnya. Dalam penelitian ini, Covid-19 disertakan sebagai variabel yang diduga dapat memengaruhi nilai tukar. Penelitian ini menganalisis stabilitas nilai tukar ASEAN-5 sebelum dan saat pandemi Covid-19. Selain itu, pengaruh faktor makroekonomi seperti inflasi luar negeri, perbedaan suku bunga, ekspor, pertumbuhan ekonomi pada negara ASEAN-5 sudah diamati. Analisis yang digunakan adalah panel statis. Berdasarkan hasil penelitian, nilai tukar cenderung berfluktuasi pada saat Covid-19. Selain itu, Covid-19 berpengaruh negatif dan signifikan terhadap pertumbuhan ekonomi tetapi tidak berpengaruh signifikan terhadap ekspor. Selanjutnya, pertumbuhan ekonomi dan ekspor serta perbedaan suku bunga dan inflasi luar negeri berpengaruh signifikan terhadap perubahan nilai tukar negara ASEAN-5 Kata kunci: ASEAN-5, Covid-19, Nilai Tukar, Panel Statis, Covid-19 is one of diseases that have impact on ASEAN-5 Economics especially on Exchange rates. Actually, Exchange rate is one of tools that used for international financial transactions. If exchange rate had high volatility, it would influence economics including international trades. Factors that influenced exchange rates can be seen from economics and non-economics. From economics, variables that have impact on exchange rates such as inflation, export and import, and etc. While from non-economics were politics, pandemic and etc. Covid-19 could be being factor that influenced exchange rates. Therefore, this research has the objectives to analyse stability of ASEAN-5 exchange rates before and during Covid-19. In other sides, it wants seeing influence of macroeconomics factors like foreign inflation, interest differential, export, economic growth in ASEAN–5 Countries. This research used static panel. The result showed exchange rates were more stabil before it came to ASEAN-5 and Covid-19 had negative and significant correlation with economic growth but not to export. In other side, all of macroeconomic factors had significant correlation with exchange rates Keywords: ASEAN-5, Covid-19, Exchange Rates, Static Panel
Keyword: Covid-19, Exchange rates, ASEAN-5

Judul: Design of gathering-conveying unit of mobile sugar cane trash chopping machine
Abstrak: A machine for gathering and chopping the piles of sugarcane trash on the field after harvesting is being designed. As a part of the machine, a gathering-conveying unit was designed. Important data including condition and characteristics of trash were collected and used for designing the unit. The average bulk density of trash on the field was 7.7 kg/m3, the average pressure to compress the trash from 40 cm to 30 cm thickness was 50.65 N/m2, and the pressure to compress the trash from 27 cm to 8 cm thickness was 1166.60 N/m2. The unit was designed to be operated at 0.3 m/s forward speed, and having 60 cm working width. The unit was consisted of: a gathering reel, a pair of conveyors, cover-frame and power transmission components. Size and operational speed of moving components were determined by analyzing mass flow rate of the trash, and operating power of the components. The gathering reel was 100 cm in diameter and having 4 series of gathering fingers for drawing and feeding the trash into the conveyors. A pair of chain-conveyors equipped with L-shaped steel bars was set face to face on lower side and upper side for conveying and feeding the leaves to the chopping unit. The stationary test showed that the gathering reel and the conveyors could work properly. The average rotational speed of the conveyor shaft and the gathering reel were 34.03 rpm and 9.97 rpm, respectively. The working capacity of the unit was 400-500 kg/hour.
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