Judul: Analisis Pengaruh Faktor Makroekonomi Terhadap Imbal Hasil Saham Sektor Keuangan
Abstrak: Investasi saham merupakan salah satu jenis investasi dan memiliki risiko, mulai dari risiko rendah hingga risiko tinggi. Besarnya imbal hasil saham dapat dipengaruhi oleh faktor-faktor makroekonomi. Beberapa faktor yang dibahas adalah nilai tukar dan Indeks Harga Saham Gabungan (IHSG) dengan periode waktu bulanan dari tahun 2009-2015. Saham sektor keuangan yang digunakan dalam penelitian ini adalah saham Bank Mandiri dan Bank Central Asia. Pengaruh faktor makroekonomi terhadap imbal hasil saham dapat diestimasi dengan menggunakan model regresi berganda. Penduga parameter model regresi diperoleh dengan metode Ordinary Least Square (OLS) yang bersifat Best Linear Unbiased Estimator (BLUE). Metode tersebut harus memenuhi asumsi-asumsi model regresi. Apabila varian galat model konstan tidak dipenuhi akan menyebabkan penduga OLS mengalami heteroskedastisitas. Hal ini dapat diatasi dengan menggunakan metode Weighted Least Square (WLS). Hasil dari penelitian ini menunjukkan bahwa nilai tukar dan IHSG berpengaruh nyata terhadap imbal hasil saham sektor keuangan., Stock investment is one type of investment and has risks, ranging from low risk to high risk. The amount of stock returns can be influenced by macroeconomic factors. Some factors to be considered are the exchange rate and the Jakarta Composite Index with monthly time periods from 2009-2015. Financial sector stocks that used in this study are the shares of Bank Mandiri and Bank Central Asia. The effect of macroeconomic factors on stock returns can be estimated using multiple regression models. The estimator of the regression model parameters is obtained by using the Ordinary Least Square (OLS) method which has Best Linear Unexpected Estimator (BLUE) characteristics. The method must accomplish the assumptions of the regression model. If the constant variance of the model error is not accomplished, it will cause the OLS estimator to have heteroscedasticity. This problem can be overcome by using the Weighted Least Square (WLS) method. The results of this study concluded that exchange rate and Jakarta Composite Index have significant effects on financial sector stock returns.
Keyword: multiple regression, exchange rate, jakarta composite index, weighted least square

Judul: Impact of stock market development on Indonesian macroeconomic variables
Abstrak: Stabilitas sistem keuangan dapat mendorong beroperasinya pasar sehingga dapat meningkatkan perekonomian suatu negara. Pasar modal merupakan salah satu elemen penting dalam menjaga stabilitas sistem keuangan. Integrasi antara perkembangan pasar modal dan kondisi perekonomian menyebabkan banyak perhatian, sehingga banyak penelitian dilakukan terhadap integrasi tersebut. Penelitian ini mengevaluasi hubungan antara Indeks Harga Saham Gabungan (IHSG) dan indikator makroekonomi Indonesia. Hasil yang didapatkan dari penelitian ini adalah IHSG memiliki pengaruh yang cukup kuat terhadap peubah makroekonomi Indonesia. Ketika IHSG mengalami guncangan, beberapa peubah makroekonomi akan mengalami guncangan. Guncangan yang diberikan IHSG terhadap peubah makroekonomi hanya pada 4 periode awal sedangkan pada periode berikutnya peubah makroekonomi cenderung stabil. Berdasarkan hasil uji hubungan kausalitas, disimpulkan bahwa peubah yang memiliki hubungan 2 arah adalah peubah IHSG dan peubah IHK, peubah Indeks Harga Konsumen dan Industrial Production Index (IPI), serta jumlah uang beredar luas (M2) dan Indeks Harga Saham Gabungan., Stability of the financial system could incourage market operation so as to bush the economy of a country. The capital market is one of the important elements in maintaining financial stability. The integration between the development of the capital market and economic conditions caused a lot of attention, so a lot of research done on the integration. This study evaluated the relationship between Jakarta Composite Index (JCI) and the Indonesian macroeconomic indicators. The results obtained from this study is JCI has a strong influence on Indonesian macroeconomic variables. When JCI shocks, some macroeconomic variables will experience shock. JCI shocks given to the macroeconomic variables only at the beginning of period 4, while in the next period of macroeconomic variables tend to be stable. Based on the causality test results, it was concluded that the variables that have a two-way relationship is JCI with Consumer Price Index (CPI), Consumer Price Index (CPI) with Industrial Production Index (IPI), and broad money supply (M2) with JCI.
Keyword: makroekonomi, model koreksi kesalahan, sistem keuangan, uji kausalitas Granger

Judul: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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