Judul: Penggunaan metode pohon regresi untuk mengkaji nilai indeks daya beli di Jawa Barat
Abstrak: Indeks daya beli selama ini dianggap sebagai salah satu indikator yang dapat mencerminkan kualitas standar hidup layak di suatu daerah. Sehingga nilai ini dapat mengindikasikan kesejahteraan dan kualitas kehidupan rakyat, serta tercapainya kebutuhan dasar manusia. Pada penelitian ini peubah respon adalah indeks daya beli karena respon kontinu maka digunakan metode pohon regresi untuk mencari peubah-peubah penciri bagi indeks daya beli di Jawa Barat. Metode pohon regresi menghasilkan model yang sederhana dan mudah untuk diinterpretasikan. Model yang dihasilkan berupa pohon regresi dengan peubah-peubah yang berpengaruh sebagai penciri menjadi simpul-simpulnya. Peubah yang paling berpengaruh akan menjadi simpul pertama yang dihasilkan. Metode pohon regresi ini dapat menjadi satu alternatif, karena tidak dibutuhkan beherapa asumsi seperti kenormalan, multikolinieritas dan heterokedastisitas yang biasa ditemui pada regresi linear.
Keyword: 

Judul: Pemetaan Komponen Indeks Pembangunan Manusia dan Tingkat Kemiskinan di Jawa Barat Menggunakan Regresi Data Panel
Abstrak: Sebagai salah satu provinsi dengan jumlah penduduk terbesar di Indonesia, Provinsi Jawa Barat berkomitmen mengatasi berbagai persoalan yang ada demi tercapainya target pembangunan berkelanjutan, terutama dalam menangani masalah kemiskinan. Kemiskinan di Indonesia dapat digambarkan oleh berbagai faktor, salah satunya yaitu Indeks Pembangunan Manusia (IPM) dan indikator-indikator penyusunnya. Penelitian ini menggunakan data dari Badan Pusat Statistik Provinsi Jawa Barat yang dianalisis dengan metode analisis regresi data panel. Regresi data panel sangat cocok digunakan pada data yang mempunyai pengaruh individu dan pengaruh waktu. Penelitian ini bertujuan untuk mendapatkan gambaran kecenderungan hubungan rata-rata lama sekolah, harapan lama sekolah, angka harapan hidup, dan pengeluaran per kapita sebagai penyusun Indeks Pembangunan Manusia dengan persentase penduduk miskin di Jawa Barat. Hasil yang diperoleh menunjukkan bahwa indikator penyusun Indeks Pembangunan Manusia memiliki karakteristik yang berbeda. Harapan lama sekolah menunjukkan pola searah, sedangkan pengeluaran per kapita, rata-rata lama sekolah, dan angka harapan hidup memiliki pola hubungan yang negatif terhadap persentase kemiskinan di Jawa Barat., As one of the provinces with the largest population in Indonesia, West Java Province is committed to overcoming various existing problems to achieve sustainable development goals, especially in addressing the issue of poverty. Poverty in Indonesia can be described by multiple factors, including the Human Development Index (HDI) and its indicators. This study uses data from the Statistics Indonesia West Java Province, and its be analyzed using panel data regression analysis methods. The panel data regression is very suitable for use on data that has individual and time effects. This study aims to get a picture of the trend of the relationship between average length of schooling, expected length of schooling, life expectancy, and per capita expenditure as components of the Human Development Index with the percentage of poor people in West Java. The results obtained show that the indicators of the Human Development Index have different characteristics. Expected length of schooling shows a unidirectional pattern, while per capita expenditure, average length of schooling, and life expectancy have a negative relationship pattern with the percentage of poverty in West Java.
Keyword: analisis regresi, kemiskinan, data panel, IPM

Judul: DNA Extraction and Characterization of Salmonella‟s Lytic Bacteriophage Genome
Abstrak: Bacteriophages are ubiquitous in nature and are known to proliferate wherever their bacterial hosts exist. Their virion particles can exist independently outside the host, however all phages are need their host to propagate. Several phages are highly specific to host cell surface receptors and any slight changes in structure results in little or no interaction between the phage and its host. Salmonella‟s phage isolated from sewage water where their bacteria exist. Three isolated of phages (phages 15, 19 and 38) were used in this research that concentrated using three types of methods. PEG/ NaCl method was firstly used to concentrate the phages based on their molecular weight to precipitate the phage particles during centrifugation. The second method was Scraping Plaque method. In this method, overlay plaques were scraped and collected in SM buffer to get phage concentrates. Enrichment method was the last method used to concentrate the phages. Phage genome isolation was done using two methods i.e. EDTA/SDS and Proteinase K methods. The first method was done using DNase I to eliminate bacterial DNA followed by SDS/EDTA treatment to release phages DNA and phenol-chloroform-isoamyl alcohol to extract the DNA. DNA was collected by isopropanol extraction. While in Proteinase K method, bacterial DNA was eliminated by DNase I and Proteinase K/SDS was used to degrade phages capsids and ethanol for DNA precipitation. The result showed that PEG/NaCl method resulted the highest phage concentration for phage 15 and phage 19, while scrapping method was the highest for phage 38. The quantity and purity of extracted DNA were low for PEG/NaCl and Scraping methods, while Enrichment method was higher indicated higher purity. Run on agarose gel electrophoresis of extracted DNA confirmed that Enrichment method results were the best while scraping and PEG/NaCl method was appeared smear background. Based on DNA genome size determination, the bacteriphages of Salmonella sp were comparable with other study of Salmonella phages. Phage P15 with genome size of 39,5 kb was close to phage epsilon15. Phage P19 with genome size of 41 kb was close to phage ST160. And phage P38 with genome size of 48,5 kb was close to phage Gifsy-1.
Keyword: