Judul: Pengaruh Jarak dan Waktu Radiasi Sinar UV terhadap Kontaminasi Bakteri Vibrio harveyi pada Air Tambak Udang.
Abstrak: Water as a medium pond environment plays an important role in the activities of farm ponds, such as shrimp farming. Bacteria free water will reduce the risk of shrimp disease. One of the most common diseases found in shrimp is Vibrio harveyi. Ultraviolet radiation technology has been proven to kill bacteria. This study aims to determine the effect of variations in the distance and long irradiation. The effectiveness of UV radiation lamps are tested at a distance of 3, 5, 7, and 9 cm. The variation of time spent among others 20, 40, 60, and 80 seconds. The test results showed that the percentage of mortality effective at a distance of 3 cm and longer lamp irradiation for 80 seconds at 85%.
Keyword: Ultraviolet radiation, Vibrio harveyi

Judul: Rancangbangun Alat Pensteril Air Tambak Sistem Kontinyu Menggunakan Radiasi Ultraviolet
Abstrak: Air dari luar tambak memiliki peluang terbesar membawa virus dan bakteri patogen ke dalam tambak udang melalui sistem pengairan. Air yang bebas dari bakteri dan virus akan mengurangi resiko serangan penyakit pada udang. Teknologi sterilisasi menggunakan radiasi ultraviolet telah terbukti mampu membunuh bakteri dan virus. Tujuan penelitian ini adalah merancang alat pensteril air tambak udang menggunakan radiasi ultraviolet dalam skala laboratorium. Alat sterilisasi menggunakan lampu UV berdaya 30 watt dan 36 watt dirancang untuk saluran air terbuka dengan posisi lampu horizontal, lampu sejajar arah aliran air dan jarak antar lampu 6 cm. Vibrio harveyi sebagai salah satu bakteri patogen pada udang digunakkan sebagai bahan uji penelitian ini. Efektivitas kinerja alat diuji pada debit aliran berbeda dengan estimasi lama penyinaran 1, 2, 3 dan 15 menit. Hasil uji kinerja menunjukkan lampu 36 watt mampu membunuh bakteri lebih banyak dari lampu 30 watt, waktu penyinaran terbaik adalah 15 menit dan bakteri yang hidup masih rata-rata berada pada tingkat patogen.
Keyword: Radiasi ultraviolet, rancangbangun alat pensteril air tambak, vibrio

Judul: Kontraksi pola graf klausa Bahasa Indonesia menggunakan metode knowledge graph
Abstrak: Knowledge graph is a new method of knowledge representation. In principle, knowledge graph consists of concept and relationship. There are already rules of constructing wordgraphs of noun, verb, adverb, adjective, preposition, and phrase. However to be able to represent the meaning of Indonesian text we still need other rules to represent clause and sentence. This research is mainly focused on constructing a subordinative clause graph and building rules of subordinative clause graph formation. In this research, subordinative clause is classified by analyzing the subordinative relationship (time, condition, if-relation, purpose, consessive, resemblace, because-relation, result, way-relation, tool-relation, complementation, attributive, equative, and comparative) and the structure of clause (the combination of subject, predicate, object, complement, and description). After the result of constructing subordinative clause graph is analyzed and formulated, the subordinative clauses are classified based on the same conjunction graph pattern and clause structure graph pattern, and we get 13 conjunction graph patterns and 48 clause structure graph patterns for subordinative clause in Indonesian.
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