Judul: Pendugaan Parameter Fungsi Intensitas Proses Poisson Non- Homogen pada Pencemaran Gas Ozon di Kota Jakarta
Abstrak: Non-homogeneous Poisson process can be applied in various fields. One of them is modeling ozone gas pollution in the city of Jakarta. Amount of ozone gas is assumed to follow the model of the non-homogeneous Poisson process. Intensity functions for Poisson process used are Weibull distribution, Musa Okumoto distribution, Goel Okumoto distribution and Goel Okumoto General distribution. Estimation of model parameter uses Bayesian method via Markov chain Monte Carlo method. The best model is chosen by using the deviance information criterion (DIC) and graphical approach. Based on the distribution used, Goel Okumoto General distribution is the best model for Jakarta city, because it has the smallest DIC value and it has estimation of expected value which is closed to the plot of the actual accumulation of ozone gas.
Keyword: air pollution, Bayesian method, non-homogeneous Poisson process

Judul: Analisis Sebaran NO₂ dan O₃ menggunakan Weather Research and Forecasting Chemistry (WRF-Chem) di DKI Jakarta
Abstrak: DKI Jakarta sebagai ibukota negara sekaligus pusat aktivitas ekonomi memiliki kepadatan penduduk yang tinggi serta berimplikasi terhadap kepadatan transportasi. Hal tersebut menyebabkan emisi pencemar udara terutama NO₂ dan O₃ juga tinggi. NO₂ dan O₃ memiliki dampak serius terhadap kesehatan masyarakat dan perlu upaya untuk mengantisipasinya. Tujuan dari penelitian ini adalah untuk menduga sebaran pencemar NO₂ dan O₃ di permukaan wilayah DKI Jakarta. Metode dalam penelitian ini menggunakan model Weather Research and Forecasting Chemistry (WRF-Chem) dengan ukuran grid 4 km x 4 km, selama 7 hari (169 jam) masing-masing pada bulan Agustus dan Desember tahun 2014. Hasil model dibandingkan dengan data observasi konsentrasi pencemar dari lima Stasiun Pemantau Kualitas Udara (SPKU) di DKI Jakarta dengan analisis stastistik Root Mean Square Error (RMSE) dan analisis korelasi. Pola sebaran pencemar berdasar luaran model menunjukkan lokasi yang paling sering terpapar pencemar NO₂ maupun O₃ dengan konsentrasi maksimum adalah Jakarta Selatan dan Jakarta Timur. Pada siang hari konsentrasi maksimum cenderung sering terjadi di sekitar Jakarta Selatan. Nilai RMSE untuk NO₂ maupun O₃ tergolong tinggi dan koefisien korelasi konsentrasi NO₂ dan O₃ tergolong rendah, hal ini menunjukkan keluaran model belum cukup baik untuk memprediksi konsentrasi NO₂ dan O₃ di wilayah DKI Jakarta. Secara umum data hasil keluaran model underestimate terhadap data hasil observasi.
Keyword: Jakarta, Nitrogen oksida, Ozon, Sebaran pencemar, WRF-Chem

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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