Judul: The Effect of El Niño Southern Oscillation  (ENSO) on Evapotranspiration and the Rice Planting Period
Abstrak: Fase El Niño Southern Oscillation (ENSO) memiliki pengaruh yang signifikan terhadap nilai evapotranspirasi dan awal masa tanam. Penelitian ini bertujuan untuk menganalisis pengaruh fase ENSO terhadap nilai evapotranspirasi dan awal masa tanam komoditas padi di Kabupaten Cilacap. Metode Penman-Monteith digunakan dalam pendekatan nilai evapotranspirasi referensi (ETo), sedangkan masa tanam padi diestimasi dengan menggunakan nilai indeks kecukupan air tanaman dan potensi kehilangan hasil. Hasil penelitian menunjukkan bahwa rata-rata nilai rata rata ETo, ETa, dan ETc pada fase La Niña lebih rendah 2.84%, lebih besar 10.98%, dan lebih besar 7.98% dibandingkan dengan fase netral, secara berurutan. Nilai rata-rata ETo, ETa, dan ETc pada fase El Niño lebih tinggi 0.77%, lebih rendah 1.12%, dan lebih rendah 0.69% dibandingkan dengan fase netral, secara berurutan. Fase La Niña menyebabkan nilai potensi pengurangan hasil 18.88% lebih rendah dibandingkan fase netral, sedangkan saat fase El Niño adalah 15.99% lebih tinggi dibandingkan fase netral pada masa tanam pertama. Fase La Niña menyebabkan dua dasarian lebih awal pada periode masa tanam pertama dibandingkan dengan fase netral, sedangkan fase El Niño menyebabkan satu dasarian lebih lambat pada periode masa tanam pertama dibandingkan dengan fase netral.
Keyword: El Niño, potential yield reduction, La Niña, crop water sufficiency index

Judul: Analisis Dampak ENSO (El-Nino Southern Oscillation) Terhadap Tingkat Kekeringan Untuk Tanaman Pangan dan Palawija (Studi Kasus : Sulawesi Selatan)
Abstrak: Climate and weather variability is a condition of long-term climate change is marked by fluctuations and deviations from normal conditions. One reason is the ENSO (El-Nino Southern Oscillation) which affects the drought. This research was conducted with the aim to determine and analyze the level of drought in South Sulawesi due to the influence of ENSO and compare the production of food crops and crops in a normal year and ENSO. Drought index is calculated based on the Palmer method by using rainfall data, air temperature and soil humidity as inputs. Based on the drought index calculated using the Palmer method, areas with monsoon rain patterns have a range of values between -22.71 to dryness 18.23, equatorial patterns ranged from -4.03 to 5.07, and the local patterns ranged from -8.57 to 10.07. Verification test results of the drought index of crop production data show that each ENSO event is always followed by a decline in rice production, especially of rice fields. As for crops, crop production generally tended to increase in every ENSO event because most crops are plants that are resistant to drought, particularly local varieties that have adapted well to its environment. Thus, the influence of ENSO drought can affect the production of food crops and crops.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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