Judul: Analisis Kebutuhan Air dan Kelebihan Air Hasil Konsolidasi di Balai Besar Penelitian Tanaman Padi Sukamandi.
Abstrak: Water balance is the balance of the input and output of water somewhere at a certain period, so it can be to determine the amount of the excess or shortage of water. This study aimed to analyze the flow of water and the excess water needs that occur at BBPTP. The procedure consisted of field studies, literature review and data analysis. Based on the analysis, the direction of water flow in the area around the research flowing to the south where there is a Cijengkol river downstream water flow. Based on the analysis of the water needs of the consolidation that has been done can be concluded highest evapotranspiration values occurred in October that is 7.13 mm/day. The highest value of water demand in October is 2.10 lt/sec/ha. The maximum irrigation discharge occurs in the irrigation channel number 7 is 28.01 lt/sec with 13.34 ha area. Based on the analysis of rainfall can be summed value maximum daily rainfall for the area of research at the Center for Rice Research amounted to 76.25 mm with a return period of 2 years and Gumbel distribution. The maximum effluent discharge occurs in the drainage channel number 88 is 117.30 lt / sec with 14.15 ha area.
Keyword: discharge of irigation, effluent discharge, evapotranspiration, rainfall

Judul: Pengembangan Sistem Monitoring Lingkungan Biofisik Padi Sawah Dengan Berbagai Sistem Irigasi
Abstrak: Tujuan penelitian ini yaitu memantau kondisi lingkungan biofisik lahan padi sawah, menganalisis kebutuhan air irigasi, dan keseimbangan air di lahan berdasarkan data lingkungan biofisik. Penelitian dilakukan selama lima bulan, dari bulan Maret - Juli 2015 di Desa Cikarawang dan Laboratorium Mekanika dan Fisika Tanah Departemen Teknik Sipil dan Lingkungan, IPB. Pada penelitian ini sistem irigasi dibagi menjadi tiga rezim air, yaitu rezim air tergenang (RT) untuk budidaya sistem konvensional, rezim air basah (RB), dan rezim air kering (RK) untuk budidaya System of Rice Intensification (SRI). Sampel tanah dari lahan diuji tekstur dan kurva retensi airnya. Pemantauan parameter lingkungan biofisik dilakukan dengan menggunakan sensor dan data logger yang spesifik. Data yang didapatkan digunakan untuk menganalisis keseimbangan air di lahan. Hasil penelitian menunjukkan lingkungan biofisik pada lahan sawah uji selama 88 hari setelah tanam (HST) dapat dipantau secara baik. Keseimbangan air di lahan menunjukkan bahwa air irigasi pada RK lebih kecil 31.2% dari RB dan RT. Akan tetapi penghematan tidak diikuti dengan peningkatan produktivitas lahan. Produktivitas lahan terbesar diperoleh pada RT sebesar 4.16 ton/ha.
Keyword: kebutuhan air, lahan padi, lingkungan biofisik, neraca air, rezim air

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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