Judul: Komparasi Pendugaan Kandungan Klorofil-a dari Citra Satelit NPP dan Aqua-MODIS di Perairan Selatan Jawa
Abstrak: This study aimed to estimate chlorophyll-a concentration from National Polar-orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP) satellite images in south Java sea, then compare it with Aqua-MODIS satellite. Visible/Infrared Imager Radiometer Suite (VIIRS) sensor on NPP has the same performance as MODIS sensor with better spatial resolution. This study uses daily imagery of September 2012 - August 2013. Algorithm Ocean Color 3-band ratio (OC3) used for the prediction of chlorophyll-a concentration. The results showed that the VIIRS sensor can be used to estimate chlorophyll-a concentration as well as MODIS sensor. Chlorophyll-a concentrations showed variation of spatial and temporal in south Java sea. In general, chlorophyll-a concentration was higher on East Season compared to West Season, but the highest occurs in Transitional II Season. The highest concentration of chlorophyll-a was 0.233 mg/m3 and the lowest was 0.098 mg/m3. Chlorophyll-a concentration prediction of MODIS is higher than VIIRS.
Keyword: South Java Sea, Remote Sensing, NPP, Chlorophyll-a, Aqua-MODIS

Judul: Komparasi Pendugaan Suhu Permukaan Laut Menggunakan Citra Satelit NPP dan Aqua-MODIS di Perairan Selatan Pulau Jawa
Abstrak: Visible / Infrared Imaging Radiometer Suite (VIIRS) instrument onboard Suomi NPP (National Polar-orbiting Partnership) satellite has the same performance as the Moderate Resolution Imaging Spectroradiometer (MODIS) intrument on the Terra/Aqua satellite that used to detect sea surface temperatures (SST) in the thermal remote sensing. This study aims to estimate the SST of the NPP satellite imagery from September 2012 to August 2013 in the south of Java waters, then compared with the SST results from Aqua-MODIS satellite data and in situ generated by Argo Float. A regression analysis were used to compare SST value retrieve from NPP satellite and Aqua-MODIS with the in situ data. The SST algorithm that used by VIIRS and MODIS instrument is Non-Linear Multi Channel SST (NLSST). The highest average SST values were found in February which is 29.866 °C and the lowest average SST values were found in August which is 26.521 C. The comparison with the NPP satellite Aqua-MODIS shows the coefficient of determination ( R2 ) NPP satellite is closer to 1 than the Aqua- MODIS
Keyword: VIIRS, Sea Surface Temperature, NPP, Argo Float, Aqua-MODIS

Judul: Analysis of M/G/1 Queue Model with Two Phases of Service and Bernoulli Feedback System
Abstrak: Model antrean M/G/1 dengan sistem feedback Bernoulli adalah model antrean dengan proses kedatangan mengikuti proses Poisson. Pada karya ilmiah ini dibahas sistem antrean M/G/1 dengan dua fase layanan. Setelah layanan pertama selesai, pelanggan dapat memilih untuk meninggalkan sistem dengan peluang ... dst, The M/G/1 queueing model with the Bernoulli feedback system is a queueing model with the arrival process following the Poisson process. In this manuscript M/G/1 queueing system with two phases of service is discussed. After the first service is completed, the customer can choose to leave the system with probability ... dst
Keyword: queue, Bernoulli, probability generating function, expected value