Judul: Analisis Interdependensi Indeks Saham Konvensional dan Syariah Negara-Negara Anggota OKI terhadap Kondisi Keuangan Global
Abstrak: Sistem keuangan dunia semakin terintegrasi seiring dengan melesatnya kemajuan teknologi informasi dan komunikasi. Selain berbagai dampak positif yang ditimbulkan, meluasnya jangkauan sistem keuangan juga menyebabkan pasar keuangan rentan tertular krisis yang terjadi di suatu negara. Penelitian ini bertujuan untuk menganalisis interdependensi indeks saham konvensional dan syariah negara-negara anggota Organisasi Kerjasama Islam terhadap penguatan fundamental ekonomi Amerika Serikat dan krisis lira Turki pada tahun 2018 dengan menggunakan data harga penutupan harian dari indeks saham konvensional dan syariah dari tahun 2016 hingga 2018. Penelitian ini menggunakan analisis multiscale correlation contagion test. Hasil analisis menunjukkan bahwa Malaysia dan Indonesia menjadi dua negara yang paling terpengaruh terhadap penguatan fundamental ekonomi Amerika Serikat karena hubungan perdagangan yang kuat dengan negara tersebut. Sementara itu Bahrain, Arab Saudi, Kuwait, dan Oman terkena pengaruh krisis lira Turki pada tahun 2018 akibat hubungan perdagangan terhadap Turki dan negara lain di regional Timur Tengah. Qatar menjadi satu-satunya negara yang tidak terkena pengaruh penguatan fundamental ekonomi Amerika Serikat dan krisis lira Turki karena memiliki pendapatan per kapita tertinggi di dunia.
Keyword: interdependensi, krisis, multiscale correlation contagion test

Judul: The Integration of Islamic Stock Market in the OIC Countries at the Event of China Stock Market Crash and US-China Trade War
Abstrak: Globalisasi mengubah sistem ekonomi dan keuangan dunia semakin terintegrasi. Hal ini dapat memicu guncangan pada pasar saham syariah dan mengurangi manfaat diversifikasi bagi investor. Tujuan penelitian ini menganalisis integrasi dan respon pasar saham syariah negara-negara OKI sebelum terjadi krisis, saat terjadi krisis pasar saham Tiongkok tahun 2015, dan saat terjadi perang dagang Amerika Serikat-Tiongkok tahun 2018-2019 dengan metode Autoregressive Distributed Lag (ARDL). Hasil penelitian menunjukkan bahwa tidak terdapat kointegrasi atau hubungan jangka panjang pada semua pasar saham syariah negara-negara anggota OKI pada periode sebelum krisis pasar saham Tiongkok. Akan tetapi, pada periode krisis pasar saham Tiongkok dan perang dagang Amerika Serikat-Tiongkok, integrasi antar pasar saham syariah di negara OKI lebih banyak ditemukan. Pasar saham syariah Qatar, Arab Saudi dan UAE mengalami efek domino dari fluktuasi harga minyak bumi karena Tiongkok dan Amerika Serikat merupakan konsumen terbesar minyak bumi. Kemudian, pasar saham syariah Indonesia dalam dua periode krisis memiliki hubungan jangka panjang dengan pasar saham Amerika Serikat dan Tiongkok. Sedangkan pasar saham syariah Malaysia dan Bangladesh hanya memiliki hubungan jangka panjang dengan pasar saham Amerika Serikat. Dalam hal manfaat diversifikasi portofolio bagi investor, terdapat relevansi kekuatan ekonomi yang dominan, faktor geografis, dan hubungan perdagangan dalam mempengaruhi integrasi pasar saham syariah., Globalization has encouraged the increasing integration of economic and financial system in the world, including the Islamic financial market. This integration could trigger shocks on the Islamic stock market and reduce the benefits of diversification. This study aimed to analyze the integration and responses of Islamic stock market in the selected OIC countries before and during the event of China stock market crash in 2015 and the trade war of United States and China between 2018 and 2019. By employing Autoregressive Distributed Lag (ARDL) method, the results showed that there was no co-integration found for all selected Islamic stock markets in the period before the China stock market crisis. However, during the period of China stock market crisis and the United States-China trade war, the co-integration was more common. This study found that the Islamic stock market of Qatar, Saudi Arabia and UAE have experienced a domino effect from fluctuations in crude oil prices. Besides, this study also discovered a long-run relationship between the Indonesian Islamic stock market, the US and China stock markets during the two events. Whereas the Malaysian and Bangladesh Islamic stock markets have only a long-run relationship with the US stock market. Regarding the benefits of portfolio diversification for investors, the findings of this study confirmed the relevance of the dominance of economic, geographic and trade relations towards the integration of Islamic stock market.
Keyword: Market Integration, Islamic Stocks, China Stock Market Crash, US-China Trade War, ARDL

Judul: Design of gathering-conveying unit of mobile sugar cane trash chopping machine
Abstrak: A machine for gathering and chopping the piles of sugarcane trash on the field after harvesting is being designed. As a part of the machine, a gathering-conveying unit was designed. Important data including condition and characteristics of trash were collected and used for designing the unit. The average bulk density of trash on the field was 7.7 kg/m3, the average pressure to compress the trash from 40 cm to 30 cm thickness was 50.65 N/m2, and the pressure to compress the trash from 27 cm to 8 cm thickness was 1166.60 N/m2. The unit was designed to be operated at 0.3 m/s forward speed, and having 60 cm working width. The unit was consisted of: a gathering reel, a pair of conveyors, cover-frame and power transmission components. Size and operational speed of moving components were determined by analyzing mass flow rate of the trash, and operating power of the components. The gathering reel was 100 cm in diameter and having 4 series of gathering fingers for drawing and feeding the trash into the conveyors. A pair of chain-conveyors equipped with L-shaped steel bars was set face to face on lower side and upper side for conveying and feeding the leaves to the chopping unit. The stationary test showed that the gathering reel and the conveyors could work properly. The average rotational speed of the conveyor shaft and the gathering reel were 34.03 rpm and 9.97 rpm, respectively. The working capacity of the unit was 400-500 kg/hour.
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