Judul: Determinants of Islamic Bank Share Prices Fluctuation  during the Covid-19 Pandemic (Case Study : PT. Bank Tabungan Pensiunan  Negara Syariah)
Abstrak: Pandemi Covid-19 yang menyebar dengan cepat di Indonesia menyebabkan Pemerintah memberlakukan kebijakan penanggulangan kesehatan berupa Pembatasan Sosial Berskala Besar (PSBB) yang menyebabkan penurunan kinerja perekonomian nasional. Namun harga saham bank syariah khususnya saham PT. Bank Tabungan Pensiunan Negara Syariah (BTPS) tetap tumbuh bahkan melebihi kinerja IHSG. Oleh karena itu, guna mengetahui faktor-faktor apa saja yang memengaruhi harga saham BTPS baik itu faktor internal perusahaan maupun faktor eksternal perusahaan, maka penelitian ini dilakukan dengan metode VECM. Penelitian ini dilakukan dalam kurun waktu antara 2019-2020. Hasil penelitian menunjukan bahwa dalam jangka pendek, hanya variabel IHSG yang berpengaruh signifikan terhadap harga saham BTPS. Sementara pada jangka panjang, variabel Price ro Book Value, Trading Volume Activity, Produk Domestik Bruto, Suku Bunga Acuan Bank Indonesia, dan IHSG berpengaruh secara signifikan terhadap harga saham BTPS. Harga saham BTPS merespon negatif adanya guncangan PDB, Trading Volume Activity, dan Kurs. Sementara guncangan Earning Per Share, Price to Book Value, Suku Bunga Acuan Bank Indonesia, dan IHSG direspon positif oleh harga Saham BTPS. Price to Book Value memberikan kontribusi tertinggi dalam menjelaskan keragaman harga saham BTPS., The Covid-19 pandemic that spreads rapidly in Indonesia has caused the Government to impose a health management policy in the form of Large-Scale Social Restrictions (PSBB) which has caused a decline in the performance of the national economy. However, the share price of Islamic banks, especially BTPS shares, continued to grow and even exceeded the performance of the JCI. Therefore, using the VECM method, this research was conducted to find out what factors influence the stock price of BTPS, both internal and external factors of the company. This research was conducted between 2019-2020. The results showed that in the short term, only the JCI variable had a significant effect on the stock price of BTPS. While in the long term, the variables of PBV, TVA, GDP, Bank Indonesia Reference Rate, and JCI have a significant effect on BTPS stock price. The stock price of BTPS responded negatively to shocks in GDP, TVA, and the exchange rate. Meanwhile, the shocks of EPS, PBV, Bank Indonesia Reference Interest Rate, and JCI were responded positively by BTPS share price. PBV gives the highest contribution in explaining the diversity of BTPS stock prices.
Keyword: Covid-19, Saham BTPS, VECM, Faktor Internal, Faktor Eksternal

Judul: Analysis of Factors Affecting Islamic Banking Financing during the COVID-19 Pandemic
Abstrak: Penyebaran COVID-19 menjadi salah satu ancaman terbesar bagi ekonomi global dan pasar keuangan di dunia. Penelitian ini dilakukan untuk mengetahui pengaruh faktor-faktor yang memengaruhi pembiayaan bagi hasil selama pandemi COVID-19 terhadap perbankan syariah di Indonesia. Penelitian ini menggunakan sampel 13 Bank Umum Syariah dan 20 Unit Usaha Syariah serta periode waktu kuartal I-IV 2020. Alat analisis yang digunakan dalam penelitian ini adalah regresi data panel dengan pendekatan Random Effect Model (REM). Hasil penelitian menunjukkan bahwa DPK, NPF, FDR, ROA, PDB, inflasi dan jumlah uang beredar secara simultan berpengaruh terhadap pembiayaan bagi hasil. Untuk hasil estimasi secara parsial, variabel DPK, FDR, dan ROA berpengaruh signifikan dan positif terhadap pembiayaan bagi hasil. Sedangkan variabel NPF, PDB, inflasi, dan jumlah uang beredar tidak berpengaruh signifikan terhadap pembiayaan bagi hasil., The spread of COVID-19 is becoming one of the biggest threats to the global economy and financial markets in the world. This study is conducted to determine the effect of the factors that influence profit-sharing financing during the COVID-19 pandemic on Islamic banking in Indonesia. This study uses a sample of 13 Islamic Commercial Banks and 20 Sharia Business Units and the time period is quarter I-IV 2020. The analytical tool used in this study is panel data regression with the Random Effect Model (REM) approach. The results indicate that DPK, NPF, FDR, ROA, GDP, inflation and the money supply simultaneously has an effect on profit sharing financing. For the partial estimation results, the variables of DPK, FDR, and ROA have a significant and positive effect on profit sharing financing. While the variables of NPF, GDP, inflation, and the money supply have no significant effect on profit sharing financing.
Keyword: COVID-19, financial performance, Islamic banking financing, macroeconomics, panel data

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
Keyword: