Judul: Sensitivitas Produksi Kelapa Sawit (Elaeis guineensis Jacq.) Terhadap Variabilitas Curah Hujan Akibat Pengaruh Penyimpangan Iklim
Abstrak: The aims of this study is to assess the impact of ENSO (El Nino and Southern Oscillation) and IOD (Indian Ocean Dipole) to rainfall variability in Marihat and Bekri Plantation and the reation with palm oil production. The correlation between those ENSO and IOD events with rainfall variability and palm oil production was analyzed using Canonical Correlation Analysis. This method uses two variables, which are rainfall and palm oil production as a Dependent variables and SOI (Southern Oscillation Index), Sea Surface Temperature Anomaly of Nino 3-4 region (120°W-170°W and 5°S- 5°N) and DMI (Dipole Mode Index) as an Independent variables. The result of this study indicates that SOI, SSTA and DMI not closely related to rainfall in those two plantations area. Statistical analysis revealed that ENSO and IOD significantly related to rainfall in Marihat plantation on the same month until 4th month (lag 0-4) and on the 8th - 12th month (lag 8-12). Fluctuation of palm oil production due to the impact of ENSO and IOD will start on 4th-11th month after water stress occurrence. The most impacted area in Marihat Plantation is Helvetia. In Bekri plantation, the correlation between climate deviation and rainfall is stronger. According to statistical analysis, ENSO and IOD significantly related to rainfall in Bekri plantation on the same month (lag 0) and 7th – 9th month (lag 7-9). It means that the impact of ENSO and IOD to fluctuation palm fruit production will be on the next 7th – 9th month after water stress occurrence.
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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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