Judul: Memaksimumkan Nilai Harapan Kekayaan Investor dengan Strategi Investasi Saham Dua Perusahaan yang Bergabung
Abstrak: Stock is the most popular form of investment. Its price changes dynamically and randomly. It is assumed that the price moves according to Brownian motion. Investors can earn more profit when a company merges with another one. In case of a merger of two companies, there is a linear combination of two stock prices that change according to Brownian motion. The objective of this research is to determine the expected value of investor’s wealth with a certain strategy. The result is presented in a theorem, which describes the investment strategy according to the company’s stock return at certain time. It has been proved that the investor can have two possibilities, i.e. the investor does not invest in either companies, or the investor invest only in one company. The expected value of wealth will be maximum if the allocation of investment in both companies are maximum.
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Judul: Pengaruh Aksi Korporasi dan Kapitalisasi Pasar dalam Pembentukan Portofolio Optimal Saham di Bursa Efek Indonesia
Abstrak: Investor sering kali membentuk portofolio dengan saham yang berasal dari emiten yang belum melakukan aksi korporasi saja dan tidak sedikit investor yang kurang memperhatikan kapitalisasi pasar dari saham pembentuk portofolionya. Tujuan penelitian ini adalah menguji proporsi dan komposisi portofolio optimal; menganalisis pengaruh kapitalisasi pasar dalam posisi optimal portofolio; dan memproyeksi tingkat pertumbuhan jangka panjang dari portofolio optimal yang dibentuk dari seluruh saham dan saham non-corporate action. Metode analisis yang digunakan adalah model Markowitz. Alat analisis yang digunakan yaitu microsoft excel 2010. Hasilnya, portofolio optimal kapitalisasi A dan A* memberikan pengembalian yang diharapkan 10% per tahun; risiko 3,16% per tahun dan 4,8% per tahun; pertumbuhan 9,95% per tahun dan 9,89% per tahun. Portofolio optimal kapitalisasi B dan B* memberikan pengembalian yang diharapkan 50% per tahun dan 19% per tahun; risiko 0,00148% per tahun dan 0,000011% per tahun; pertumbuhan 50% per tahun dan 19% per tahun. Portofolio optimal kapitalisasi C dan C* memberikan pengembalian yang diharapkan 90% per tahun dan 27% per tahun; risiko 28,97% per tahun dan 0,609% per tahun; pertumbuhan 90% per tahun dan 27% per tahun.
Keyword: aksi korporasi, kapitalisasi, portofolio optimal

Judul: Bakteri Flora Paling Umum Ditemukan Di Rongga Mulut Python Retikulatus Liar
Abstrak: Reticulated python is a non-venomous snake native to South and Southeast Asia. It is the world's longest snake. The purpose of this literature review study is to investigate the common bacterial flora found in oral cavity of the reticulated python. The data for this case study was obtained from several articles, journals, books and credible websites. Based on existing data, there are a wide variety of bacteria in the oral cavity of free-living reticulated pythons. The majority of the organisms were Gram-negative. Pseudomonas spp. were the most commonly isolated bacterial species, being found in 50% of the snakes sampled, and was followed by Staphylococcus sciuri.
Keyword: Reticulated python, snake bites, bacterial flora, oral cavity, microbiology