Judul: Pengadaan Dissolved Oxygen dari High-Blow dengan Sumber Energi Surya dalam Pemeliharaan Juvenil Udang Vaname Litopenaeus vannamei
Abstrak: The critical energy of PLN in supplying the electrical energy, influence the high-blow ability in work to supply the dissolved oxygen. So it’s important to search for other sources of electrical energy which are low cash, stable, regenerable and always available to supply the electrical energy to the high-blow. This research aims to compare the provision of aeration produced by high-blow between solar energy sources and PLN energy sources in the white shrimp Litopenaeus vannamei juvenile rearing. It was termed by stability of electric power (P), dissolved oxygen (DO), oxygen transfer rate (OTR), the effectiveness of high-blow (E), the survival rate (SR), as well as the specific growth rate (SGR). Treatment was applied, by using of a high-blow (for 2 fiber tub) with solar energy sources (SES) and the use of a high-blow (for 2 fiber tub) with PLN energy sources (SEP). Based on observations, it was known that P in the treatment of SEP was relatively more stable around 129.09-149.85 watt while P in the treatment of SEP was ranged from 80.80-174.80 watt. P in the treatment of SEP had 0 watt (power off). DO in the treatment of SES ranges from 7 s.d.8 mg/Liter, while the DO in the treatment of SEP ranged up to 6.8 8 mg/liter. OTR in the treatment of SES was 9.6 x 10-4 kg O2/jam, whereas the treatment of SEP OTR was 8.7 x 10-4 kg O2/jam. The E of the treatment of SES was 60.6%, while the E treatment of SEP was 57.3%. SR in the treatment of SES was 90%, while the SR in the treatment of SEP was 96%. SGR on SES treatment of 18.69%, while the SGR in the treatment of SEP was 19.49%. White shrimp juvenile rearing using aeration of different energy sources did not provide a significant influence on the survival rate (SR) and growth (SGR) of white shrimp juvenile indicated by the SR ranged around 90% and 18.5% of SGR. Thus the energy source of solar power could be an alternative source of electrical energy for the seeding of white shrimp.
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Judul: THE HEALTH STATUS OF SHRIMP (Litopenaeus vannamei) REARING WITHIN AND WITHOUT NURSERY METHODS
Abstrak: Udang vaname merupakan salah satu komoditas budidaya ekspor unggulan Indonesia. Rendahnya Survival Rate (SR) adalah salah satu kendala yang masih sering dijumpai sampai sekarang. Metode pendederan mengkondisikan udang supaya lebih sehat karena minim kontak langsung dengan suspensi limbah yang berada di dasar wadah budidaya, akumulasi limbah, dan pengadukan air lebih sedikit. Tujuan penelitian ini menganalisis dan membandingkan kinerja produksi dan status kesehatan udang vaname (Litopenaeus vannamei) pada pembesaran dengan metode pendederan dan tebar langsung. Penelitian ini dilakukan selama 84 hari. Penggunaan pendederan terbukti memiliki hasil produksi dan parameter respon imun yang lebih baik dengan rata-rata SR sebesar 92,70 % dan parameter respon imun yakni Aktivitas Fagositik (AF) dan Total Haemocyte Count (THC) yang lebih tinggi dan berbeda nyata yang secara berturut-turut nominalnya adalah 57,67 ± 2,51 % dan 11,53 x 106 ± 0,80 sel/ml. Nilai Respiratory Burst (RB) dan Phenoloxidase (PO) juga lebih tinggi meskipun tidak berbeda nyata. Selain itu, pada akhir penelitian, perlakuan pendederan mendapatkan hasil parameter kualitas air yang lebih baik, khususnya nitrit serta memiliki warna air yang lebih kehijauan. Penggunaan metode pendederan sebelum dilakukan penebaran dalam petak budidaya pada segmen pembesaran, dapat meningkatkan status kesehatan udang dan menekan kematian., Vaname shrimp is one of Indonesia's leading export cultivation commodities. Low Survival Rate (SR) is one of the obstacles that are still often encountered today. The nursery method conditions the shrimp to be healthier because there is minimal direct contact with the waste suspension at the bottom of the cultivation container, waste accumulation, and less water stirring. The purpose of this study was to observe, analyze, and compare the production performance and health status of vaname shrimp (Litopenaeus vannamei) on enlargement with nursery and direct stocking methods. The study was conducted for 84 days. The use of nursery proved to have better production results and immune response parameters with an average Survival Rate of 92.70 % and immune response parameters, like Fagositic Activity (FA) and Total Haemocyte Count (THC), which were higher and significantly different, respectively, the nominal was 57,67 ± 2,51 % and 11,53 x 106 ± 0,80 cells/ml. Value of Respiratory Burst (RB) and Phenoloxidase (PO) also higher but not significantly different. In addition, at the end of the research, the nursery method treatment obtained better water quality parameters, especially nitrites and had a greener water color. The use of nursery methode before stocking on enlargement rearing pond can improve health status and reduce mortality.
Keyword: Enlargement, health, imune, nursery, vannamei

Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf