Judul: Kajian Filtrasi Air Limbah Sungai Ciliwung Mengunakan Membran Selulosa Asetat dan Teflon
Abstrak: On this research would do waste water filtration by using membrane of teflon and cellulose acetate. The method was used is a dead end for teflon and for cellulose acetate membrane method will use dead-end and cross-flow. It also would have done three variations of pressure for each treatment. From the results of research on deadend with PTFE membrane needs to be greater pressure than cellulose acetate. For a dead-end debit highest on PTFE pressure 5.8 psi with a value of 0,604 ml/minute and flux of 0.625 cm/min. For a dead-end with cellulose acetate membrane meliki highest debit on the pressure of 7.5 psi with the value 0.41 ml/minute and fluksnya 0.06 cm/min. whereas cross-flow membrane cellulose acetate produces the highest debit 0.42 ml/min and the highest flux 0.021 cm/min at a pressure of 7.5 psi. for the lowest value of turbidity characteristics possessed by the process of cross-flow at pressure 5 psi with a value of 0.22 NTU. Most neutral acidity was owned by the process deadend with cellulose acetate membrane pressure 2.5 psi. type the lowest value for the masses was a product of cross-flow with a pressure of 5 psi with a value of 1,02606 gr/cm3. Total solids remaining the lowest also owned by the product of cross-flow filtration pressure 5 psi. for the lowest value of viscosity obtained on the process dead-end with teflon membrane on the pressure of 5.8 psi.
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Judul: Filtrasi Air Sungai Menggunakan Membran Nilon dengan Metode Dead-End
Abstrak: On this research nylon membrane be used as filtration media of river water. Filtration did use with deadend method it is a methode position of membran is perpendicular with feed. River water characterized physicly before and after filtration. There are characterizations observed viscosity, turbidity, and density. There are three variant mass of nylon 5, 6 and 6.5 grams. The methode of sintesize membrane is phase inversion. Rejection of 6.5 grams is the biggest it is 69.98% for turbidity rejection, 98.67% for viscosity rejection and 21.06% for density rejection. Membrane was test its strength and morphology used Economic Force Sensor and Scanning Electron Microscopy (SEM) before and after filtration in variant mass. The strength of membrane before filtration is more low than membrane after filtration and the more weight nylon mass the more its strength. The size of pore membrane is 5 micrometre and it’s categorized as microfiltration. There is a fouling in morphology of membrane after filtration and the more weight nylon mass the more tiny its pore
Keyword: Bogor Agricultural University (IPB), river water, nylon, membrane, filtration

Judul: Integration of Islamic Stock Markets of OIC Countries Before and During the Russia-Ukraine War Crisis
Abstrak: Pasar saham yang terintegrasi memberikan dampak negatif seperti percepatan co-movement (pergerakan bersama) yang rentan terhadap guncangan ekonomi, maupun krisis pasar global ke pasar domestik. Salah satu krisis yang terjadi pada tahun 2022 adalah perang Rusia-Ukraina yang berdampak pada pasar saham, termasuk pada saham syariah yang dipercaya lebih tahan terhadap guncangan krisis global. Penelitian ini bertujuan untuk meneliti perkembangan, integrasi dan respon lima pasar saham syariah negara OKI pada perang Rusia-Ukraina. Metode yang digunakan adalah VAR/VECM pada indeks DJIMMT25, SPSADS, SPSUAEDS, JII, DJIMT, SPBMIR, dan SPBMIU. Hasil penelitian menunjukkan pergerakan yang sama pada pasar saham UAE dan Arab Saudi, sedangkan Turki mengalami tren positif selama perang. Pasar saham syariah negara OKI selama periode perang Rusia-Ukraina terkointegrasi, sementara pasar saham Malaysia memengaruhi pasar saham syariah empat negara OKI lainnya. Hasil IRF menunjukkan terdapat efek permanen pada volatilitas pasar saham syariah negara OKI akibat guncangan yang diberikan. Namun, respon volatilitas relatif kecil karena kontribusi guncangan lebih didominasi oleh pasar saham itu sendiri, An integrated stock market has negative impacts, such as accelerating co-movement, which is vulnerable to economic shocks and global market crises on the domestic market. One of the crises in 2022 was the Russia-Ukraine war which impacted the stock market, including Sharia stocks which were believed to be more resistant to the shocks of the global crisis. This study examines the development, integration, and response of OIC countries five Islamic stock markets in the Russia-Ukraine war. The method used is VAR/VECM on the DJIMMT25, SPSADS, SPSUUAEDS, JII, DJIMT, SPBMIR, and SPBMIU indices. The results show the same movement in the UAE and Saudi Arabia stock markets, while Turkey experienced a positive trend during the war. The Islamic stock market of the OIC countries during the Russia-Ukraine war was cointegrated. In contrast, the Malaysian stock market influenced the Islamic stock markets of the other four OIC countries. The IRF results show a permanent effect on the volatility of the Islamic stock market in OKI countries due to the shocks given. However, the volatility response is relatively small because the stock market itself dominates the contribution of shocks.
Keyword: co-movement, OIC, Rusia-Ukraine war, sharia stock market integration