Judul: The effect of Climate Change and Other Determinants on Coffee Prices in Indonesia
Abstrak: Climate change is a severe problem that will be faced by all people in the world. One of the climate changes that often occur and have a significant impact on Indonesia is the El Nino Southern Oscillation (ENSO). The ENSO phenomenon causes fluctuations in rainfall that affect the production of the agricultural sector, especially plantation crops. This study uses the spatial panel analysis method to examine the effect of climate change using rainfall indicators on coffee prices. The data used are from the ten largest coffee-producing provinces with a time span from 2010 to 2020. The results show that rainfall has a significant effect on the increase in coffee prices, followed by other factors, substitution prices, productivity, population, and wages of farm labor in the plantation sub-sector. Meanwhile, the COVID-19 pandemic has had an effect on coffee prices.
Keyword: coffee, climate change, ENSO, rainfall, spatial panel

Judul: Dampak Perubahan Iklim Terhadap Harga Komoditas Kopi di Daerah Terdampak Fenomena El Nino dan La Nina.
Abstrak: Fenomena alam seperti kekeringan berkepanjangan, curah hujan yang meningkat, kebakaran dan banjir yang terjadi di Indonesia, saat ini memberikan dampak yang luas bagi segala aspek kehidupan manusia. Hal ini diakibatkan dari perubahan iklim yang memberikan dampak cukup signifikan. Dampak dari perubahan iklim adalah terjadinya peningkatan iklim ekstrem. Perubahan iklim membuat anomali suhu yang mencolok seperti fenomena El Nino dan La Nina atau yang biasa disebut dengan fenomena ENSO (El Nino Southern Oscillation). Fenomena ENSO menyebabkan fluktuasi curah hujan, sehingga berdampak terhadap sektor pertanian, terutama subsektor perkebunan. Penelitian ini mengkaji dampak perubahan iklim terhadap harga kopi dengan metode panel data statis. Data yang digunakan dalam penelitian ini berupa 12 provinsi terdampak dengan rentang tahun 2010 hingga 2017. Fenomena ENSO ditunjukkan melalui indikator curah hujan. Hasil yang diperoleh dalam penelitian ini adalah El Nino berpengaruh signifikan dalam meningkatkan harga kopi, dan diikuti oleh faktor lainnya yaitu harga barang substitusi (harga cokelat), produktivitas dan PDRB Riil.
Keyword: ENSO, El Nino, data panel statis, harga kopi, La Nina

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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