Judul: Analisis Optimisasi Persediaan Mata Uang Riyal untuk Musim Ibadah Haji (Studi Kasus di Bank Syariah Mandiri Cabang Bekasi)
Abstrak: SAR or Saudi Arabian Real is the currency of Saudi Arabia is widely used to meet the requirements during the pilgrimage. In 2011, the number of Hajj is dominated fleet departure from Jakarta-Bekasi embarkation fleet as much as 85 groups or 37,740 worshipers. This has resulted in high demand for SAR in several local banks to provide more SAR during the pilgrimage season, one of which is a Bank Syariah Mandiri Bekasi Branch has provided SAR more than other Bank Syariah Mandiri Branch, in the amount of 210,000 SAR. The amount of inventory that has been prepared BSM Bekasi branch sometimes not in line with the level of demand for SAR because of the uncertain state of demand. This condition, triggering BSM Bekasi Branch excess inventory, so that the necessary proper inventory management. This study aims to (1) Studying the patterns of demand and supply SAR for the Hajj season, (2) Selecting inventory models SAR for the Hajj season, (3) Calculating the optimal inventory levels SAR. The primary data used in this study were obtained through direct interviews with the BSM Bekasi Branch and the Ministry of Religious based list of questions directly. Secondary data obtained from historical data company, literature studies, articles or research related literature. Qualitative data analysis is done by analyzing the patterns of demand and supply patterns, as well as the BSM condition Bekasi Branch. Quantitative data analysis is done by calculating the optimum supply quantity of demand that has been forecast. Based on the pattern of inventory, ordering SAR does not occur every month because the supply is only focused on the pilgrimage season. Hajj month period can be determined based on the high demand SAR in a given month. Pattern of demand and supply patterns, forecasting can be done about the number of reservations by observing the pattern of demand SAR during the Hajj months to avoid excess or shortage of inventory. Forecasting demand of 158,682 SAR in the period from Hajj performed by using the moving average method. Judging from the conditions that existed at BSM Bekasi branch, where demand SAR during the Hajj season varies and can not be known with certainty, a two-day lead time, order frequency as needed, the inventory method that can be applied BSM Bekasi branch is continuous method probabilitic EOQ. Determination of optimum quantity obtained through iteration, that is equal to 101,244 SAR with reorder levels and inventory reserves amounted to 16,592 SAR and 11,302 SAR. The optimal conditions can anticipate the resulting excess inventory inefficiencies, as well as inventory shortages resulting in loss of customer trust, so that the Bekasi branch of Bank Syariah Mandiri to optimize profitability and create customer loyalty.
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Judul: Analysis of Returns and Risks of Sharia Stocks Portfolio and Conventional Stocks Portofolio with the Efficient Frontier Method
Abstrak: Kondisi pandemi di Indonesia, yang menjadi salah satu penyebab jumlah investor saham naik signifikan, membuat saham syariah semakin diminati. Kenaikan jumlah peminat tersebut harus dibarengi dengan kenaikan angka literasi saham syariah agar umat islam di Indonesia bisa berinvestasi dan tetap menjalankan aturannya sebagai seorang muslim. Perlu dilakukan analisis portofolio saham syariah dan konvensional agar bisa diketahui potensi dari kedua portofolio saham. Data yang digunakan untuk portofolio saham syariah adalah data saham Telkom dan Unilever, sedangkan untuk portofolio saham konvensional adalah data saham BCA dan BRI periode 1 Januari 2012-31 Desember 2018. Dilakukan pemodelan ARMA-GARCH untuk menghilangkan efek autokorelasi dan heteroskedastisitas pada galat. Setelah itu dilakukan pemodelan Copula untuk membentuk fungsi sebaran bersama galat baku. Selanjutnya dibuat grafik efficient frontier dari kedua portofolio dan dianalisis dengan asumsi risiko minimum, imbal hasil maksimum, dan reward-to-variability ratio maksimum. Hasil analisis tersebut menunjukkan portofolio saham syariah relatif lebih cocok dipilih bagi investor moderat, sedangkan portofolio saham konvensional relatif lebih cocok dipilih bagi investor agresif., Pandemic conditions in Indonesia, which one of the causes the number of stock investors increase significantly, the sharia stock becomes more interesting. The increase in the number of enthusiasts must be accompanied by an increase in the literacy rate of the sharia stock so that Muslims in Indonesia can invest and continue to carry out their rules as a muslim. It is necessary to analyze the returns and risks of sharia and conventional stock portfolio so that the potential of these two stocks portfolio can be seen. The data used for sharia stocks portfolio are Telkom and Unilever, whereas the data used for conventional stocks portfolio are BCA and BRI for the period 1 January 2012-31 December 2018. ARMA-GARCH modeling was carried out to eliminate the effects of autocorrelation and heteroscedasticity on the errors. After that, Copula modeling was carried out to form a joint cumulative distribution function of standard errors. Next, an efficient frontier graphs were made of those portfolios and analyzed with the assumption of minimum risk, maximum return, and maximum reward-to-variability ratio. The results of the analysis show that the sharia stock portfolio is relatively more suitable for moderate investors, while the conventional stock portfolio is relatively more suitable aggresive investors.
Keyword: return, risk, sharia stock, conventional stock, efficient frontier

Judul: Root endophytic fungi of tomato and their role as biocontrol agents of root-knot nematodes Meloidogyne incognita (Kofoid and white) Chitwood and growth promotion in tomato plants (Lycopersicon esculentum Mill):
Abstrak: Nematoda puru akar, (Meloidogyme incognita) adalah salah satu OPT utama tomat (Lycopersicon esculentum Mill) di seluruh dunia. Tujuan penelitian ini adalah untuk (1) mengeksploitasi cendawan endofit (2) melihat pengaruh cendawan endofit terhadap nematoda puru akar (Meloidogyne incognita) serta pemacu pertumbuahan pada tanaman tomat, (3) menginvestigasi mekanisme cendawan endofit menekan nematoda puru akar secara in-vitro.
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