Judul: The January Effect Analysis on the Indonesian Stock Market (Case Study on LQ45 index stocks 2016-2020)
Abstrak: The January effect Anomaly that have been in Indonesian stock market inconsistent. However, the existence of January effect anomaly create a potential risk which negative return in the non-January trading month. This study aims to identify the characteristic of January effect anomaly in Indonesian stock market and the impact to the stock abnormal returns in long term five years. Sample of this research are 27 stock in stock index LQ45 from 2016 to 2020. The analytical tool used in this study is multiple linear regression with data panel method. The findings of this study are the January effect anomaly only occurs in some stock in stock index LQ45, and the peak period was in 2018 and 2019. Regression test found that the January effect anomaly does not have a significant effect on stock abnormal returns. This results have implications for investors so as not to overreact to the January effect anomaly. As well as maintaining the efficient condition of the Indonesian stock market by conducting fair share trading.
Keyword: January effect, market anomalies, multiple linear regression, panel data

Judul: Impact analysis on inflation, sbi interest rates,  money suply and exhange rates against lq-45 index on Indonesia stock echange  rates in 2009-2013
Abstrak: Pasar modal memiliki peran penting bagi perekonomian suatu negara. Jika kondisi perekonomian semakin membaik akan menarik minat investor untuk berinvestasi pada pasar modal (bursa efek). Investasi saham dipengaruhi kondisi makro suatu negara. Tidak stabilnya situasi moneter yang tercermin dari inflasi, suku bunga SBI, jumlah uang beredar dan nilai tukar rupiah terhadap dolar Amerika mengakibatkan kekacauan dalam perekonomian. Hal tersebut menunjukkan eratnya pengaruh makro ekonomi terhadap indeks harga saham di pasar saham. Tujuan dari penelitian ini adalah mengkaji mengenai pengaruh indikator ekonomi makro, tingkat inflasi, tingkat suku bunga SBI, jumlah uang beredar dan nilai tukar rupiah terhadap indeks LQ-45 pada periode 2009-2013 di Bursa Efek Indonesia. Metode analisis data yang digunakan dalam penelitian ini adalah menggunakan regresi linier berganda dan metode pengolahan data menggunakan SPSS 15.0 serta metode pengambilan sampel dengan cara purposive sampling. Data diperoleh dari Monthly Statictic, Indonesia Stock Exchange, Indikator ekonomi dari Badan Pusat Statistik dan laporan bulanan Bank Indonesia. Data dikumpulkan dengan teknik dokumentasi. Hasil penelitian menunjukkan bahwa inflasi dan suku bunga SBI tidak berpengaruh terhadap indeks LQ-45. Namun, jumlah uang beredar berpengaruh positif terhadap indeks LQ-45 sementara nilai tukar rupiah terhadap dolar Amerika Serikat (kurs) berpengaruh negatif terhadap indeks LQ-45 di BEI pada periode 2009- 2013., Capital market has an important role for economic growth of a country. If the economic condition growth well established, it will be attract investor to invest on capital market (stock exchange). Unstable monetary situation is reflected in the inflation, SBI interest rates, money supply and exchange rates, lead the economy to chaos. That shows the close macroeconomic impact on LQ-45 Index in the stock market. The purpose of this study is to examine the influence of macro-economic indicators, inflation, interest rates, money supply and exchange rates on the LQ -45 Index during the period of 2009-2013. The statistical method uses the multiple linear regression and using SPSS 15.0. and using purposive sampling to take sample. Data obtained from the Monthly Statistic, Indonesia Stock Exchange, the economic indicators of the Central Bureau of Statistics, and the monthly report of Bank Indonesia. Data was collected by the Documentation techniques. The results show that inflation and interest rates has not effect to LQ-45 Index but, money supply has a significant positive effect on LQ-45 index, while the variable exchange rates to US dollar have a significant negative effect on LQ-45 index in Indonesia Stock Exchange (IDX) during period of 2009-2013.
Keyword: indeks LQ-45, inflasi, jumlah uang beredar, nilai tukar rupiah, suku  bunga SBI

Judul: Hydrothermal Synthesis of Biphasic Calcium Posphate
Abstrak: Biphasio calsium phosphate (BCP), which was a mixture of hydroxypatite (HA) and tricalcium phosphate (TCP), was synthesized by hydrothermal method followed by sintering process. Hydroxyapatite was produced by using natural calcium source CaO from hen's eggshell and (NH4)2HPO4 as phosphate souce, other hydroxyapatite sample was produce by using synthetic calcium source Ca(OH) and H3PO4 as phosphate source.
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