Judul: Rancang Bangun Unit Pembuka Alur, Pembumbun dan Pemadat Tanah pada Mesin Penanam Bibit Nanas
Abstrak: Pineapple planting at Great Giant Pineapple Company is still done manually with low capacity and poor planting results. Therefore, a pineapple transplanting machine has been designed, constructed and tested. The machine was designed to be able to plant pineapple suckers in one row per pass, having 25 cm planting space, 10 cm planting depth, and powered by a four wheel tractor. Design and test results of some main parts of the machine, including: planting furrow opener, covering disk and press wheel, were discussed in this thesis. Those parts were designed based on field condition and planting standard as field conditions. A shoe type furrow opener was designed to be able to make planting furrow of 15 cm width and 10 cm depth. A pair of covering disk of 25 cm diameter was set behind the furrow opener for covering the lower part of the planted suckers by soil. A pair of press wheel of 30 cm diameter was set behind the covering disk for firming the soil to the plant. The test results showed that the average furrow depth was 14 cm, the furrow and suckers could be covered well by soil, and the covering soil could be firmed with the soil bulk density of 0.78 kg/cm3.
Keyword: press wheel., covering disk, furrow opener, transplanting machine, pineapple

Judul: Rancang Bangun Mesin Penyiang Padi dengan Sistem Kendali Jarak Jauh menggunakan Remote Control
Abstrak: Padi merupakan tanaman penting penghasil beras yang akan dijadikan nasi sebagai makanan pokok sehari-hari di Indonesia. Namun produksi padi menurun yang salah satunya diakibatkan oleh gulma. Penelitian bertujuan untuk merancang bangun mesin penyiang yang dapat mengatasi gulma lebih efektif dan efisien dibandingkan cara manual atau menggunakan alat konvensional. Penelitian diawali dengan identifikasi dan perumusan masalah, perumusan dan evaluasi konsep desain, analisis rancangan, manufaktur atau prototyping, serta diakhiri pengujian kinerja hasil rancangan. Mesin penyiang yang dibangun menerapkan 2 buah roda sirip sebagai penggerak, 6 buah pisau rotari sebagai implemen pemotong, motor dc 430 Watt sebagai sumber penggerak, baterai Lipo 3000 mAH sebagai sumber tenaga, dan kopling cakar sebagai sistem belok. Hasil pengujian menunjukkan mesin mampu menempuh kecepatan rata-rata sebesar 8,25 x 10-2 m/s, menghasilkan kapasitas lapang teoritis sebesar 74,21 m2/jam dan efektivitas sebesar 65,52%. Nilai tersebut sudah berada diatas gasrok, namun masih dibawah ski rotary weeder dan power weeder., Paddy is an important rice-producing crop that will be used as rice as a daily staple food in Indonesia. However, rice production has decreased, one of causes is caused by weeds. The research aims to design a weeding machine that can deal with weeds more effectively and efficiently than the manual method or using conventional tools. The research begins with identification and formulation of problems, formulation and evaluation of design concepts, design analysis, manufacturing or prototyping, and ends with testing the performance of the design results. The weeding machine that is built applies 2 fin wheels as a drive, 6 rotary blades as a cutter implement, a 430 Watt dc motor as a driving source, a 3000 mAH Lipo battery as a power source, and a claw clutch as a turning system. The test results show the machine is able to travel an average speed of 8,25 x 10-2 m/s, resulting a theoretical field capacity 74,21 m2/hour and effectiveness is 65,52%. These values are above the gasrok, but still under rotary weeder and power weeder.
Keyword: paddy, paddy weed, weeding machine, design, testing

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