Judul: Analisis Hubungan Pengungkapan Corporate Social Responsibility (CSR) Terhadap Kinerja Keuangan Dan Harga Saham Pada Perusahaan LQ45
Abstrak: This research is alms to analyze the relationship between the disclosure of Coporate Social Responsibility (CSR) and financial performance stock price in the LQ45 company. The writer use the annual reports of LQ45 company in period Feb – Jul 2012 for the data. The variable are based on the standard CSR disclosure Global Reporting Initiatives (GRI), the financial performance reflected by the current ratio, return on assets (ROA), return on equity (ROE), debt to equity/CAR, as well as stock prices fre flected by the return stock. The results are indicate Coporate Social Responsibility (CSR) disclosure in annual reports related significant to financial performance, it means that expanding Coporate Social Responsibility (CSR) disclosure in annual report is better financial performance. Coporate Social Responsibility (CSR) disclosure in in the annual report related significant to the stock price, it means that expanding Coporate Social Responsibility (CSR) disclosure in annual reports is higer for that stock price. And the result for this research is the finansial performance related significant to stock price of a company, it means that the better to financial performance of a company than will increase the stock price in the company.
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Judul: The Effect of Corporate Social Responsibility on Financial Performance (A Comparison between Indonesia and Australia)
Abstrak: Setiap perusahaan memiliki tanggung jawab untuk melakukan kegiatan tanggung jawab sosial dan lingkungan (TJSL), pelaporan terhadap keberlanjutannya, serta mengelola dan mengembalikan dana yang diberikan oleh shareholders. Tujuan penelitian ini adalah menganalisis hubungan TJSL dengan kinerja keuangan di perusahaan Indonesia dan Australia, membandingkan pengungkapan TJSL di Indonesia dan Australia, dan membandingkan pengungkapan TJSL disetiap sektor. Sampel yang digunakan adalah perusahaan yang terdaftar pada LQ45 untuk Indonesia dan ASX50 untuk Australia. Metode yang digunakan adalah regresi linear sederhana. Hasil yang diperoleh ialah TJSL berpengaruh positif dan signifikan terhadap ROA di kedua negara namun tidak berpengaruh signifikan terhadap ROE. Selanjutnya, Australia memiliki pengungkapan TJSL yang lebih unggul dibandingkan Indonesia serta terdapat perbedaan pengungkapan secara kuantitas pada sektor-sektor yang menjadi sampel penelitian. Hal ini menunjukkan perlu adanya peningkatan pelaporan TJSL yang didukung oleh perencaan TJSL secara matang oleh perusahaan di Indonesia., Every company has a responsibility to carry out corporate social responsibility (CSR) activities, reporting on its sustainability, as well as managing and returning funds provided by shareholders. The purpose of this study was to analyze the relationship between CSR and financial performance in Indonesian and Australian companies, compare CSR disclosures in Indonesia and Australia, and compare CSR disclosures in each sector. The samples used are companies listed on LQ45 for Indonesia and ASX50 for Australia. The method used is simple linear regression. The results showed that CSR has a positive and significant effect on ROA in both countries but has no significant effect on ROE. Furthermore, Australia has superior CSR disclosures than Indonesia and there are differences in disclosure in quantity in the sectors that are the research sample. This shows that Indonesian companies need to increase their CSR reporting, which is supported by careful planning.
Keyword: Australia, Indonesia, ROA, ROE, corporate social responsibility

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model