Judul: Variabilitas Parameter Oseanografi Di Perairan Sekitar Kepulauan Kei Berdasarkan Data Citra Multi Sensor
Abstrak: This research aims to assess the variability of sea surface temperature (SST), chlorophyll-a concentration, and sea surface height (SSH), both spatially and temporally, in the waters around the Kei Islands. Based on monthly average wind direction, a year can be divided into four seasons, namely: Northwest season, First Transitional season, Southeast season and Second Transitional Season. The period of each season, respectively, are: December to March; April; May to October and November. The average value of monthly SST in each season are as follows: 30.460C; 30.190C; 29.320C and 30.540C, while the chlorophyll-a concentrations are as follows: 0.51; 0.59; 0.72 and 0.62 mg/m3. Period East season is the enrichment period where the average value of chlorophyll-a concentrations increased in the western part of the study area in August to 1.18 mg/m3. Enrichment of these waters due to wind pushing east into the Arafura Sea water mass Kei Islands and surrounding waters.
Keyword: 

Judul: Variabilitas hasil tangkapan ikan hubungannya dengan sebaran klorofil-a dan suhu pemukaan Laut Data Inderaja di Perairan Kalimantan Timur
Abstrak: Sea surface temperature (SST) and chlorophyI1-a are two important oceanographic parameters determining the abundance and distribution of fish. The aim of this research is to determine the variability of SST, chlorophyll-a, fish catch and the relationship between SST, chlorophyll-a with fish catch. This study took place in East Kalimantan waters. The data of this study has been taken from Aqua MODIS level 3 satellite images, data of meteorology and fish catch. East Kalimanm waters provides pelagic fish resource dominated by scads, frigate tuna and stripped mackerel. The amount of fish catch from east Kalimantan waters landed at PPI Selili Samarinda city was significantey correlated with SST (r = 0,53) and chlorophyll-a concentration (r = 0,63). Both oceanography parameters were fluctuative seasonally. The SST reached its maximum (30,49 OC) during west to east switchover season and reached its minimum (28,67oC) during north west monsoon season. Mean while the chlorophyll-a content reached its maximum (0,420 mg/m3) during west season and reached its minimum (0,118 mg/m3) during east to west switchover season. The peak of fish landing at PPI Selili Samarinda city occurred during north west monsoon season when SST was low and chlorophyll-a concentration is high, vice versa, the poor fish landing occurred during west to east switchover season when SST was high and chlorophyll-a was low.
Keyword: 

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.
Keyword: