Judul: Effectivity and Efficiency of Ambon Banana Musa paradisiaca Stem and Papaya Carica papaya Seed Distillation To Treat Argulus sp. on Goldfish Carassius auratus
Abstrak: Salah satukomoditasikan hias yang populer di Indonesiaadalah ikan mas koki Carassius auratuskarena bentuk dan coraknyayang unik. Infeksi parasit Argulus sp. adalah satu masalahyang kerap menyerang kegiatan budidaya mas koki.Metode yang dapat diberikan untukmenanggulangi infeksi adalah dengan menggunakan bahan kimia berupa obat dimilin®. Dimilin®meskipun terbukti efektif, harganya tergolong mahal dan tidak ramahlingkungan. Perlu ditemukanpengobatanyang lebih murah dan ramah lingkungan terhadap serangan Argulussp.. Penelitian ini bertujuanmenguji efektivitas dan efisiensi pengobatan parasit Argulus sp. dengan menggunakan herbalperasan batang pisang ambon dan perasan biji pepaya.Penelitian ini menggunakan empatperlakuan masing-masing tiga ulangan yaitu: kontrol positif, obat dimilin®, perasan biji pepaya, dan perasan batang pisang. Perendaman ikan dilakukan pasca-infeksi setelah ikan menunjukkan gejala visual. Hasil menunjukkan bahwa perlakuan yang terbaik adalah perasan biji pepaya dengan kelangsungan hidup 80% dan analisis usaha keuntungan sebesar Rp 1.365.000,-, rasio R/C sebesar 1,31dan payback period sebesar 0,6 tahun., One of the most popular ornamental fish in Indonesia is goldfish Carassius auratus due to its unique shape and color pattern. The infection by parasite Argulus sp. is one of the problems that occur in the industry. A method that can be used to treat the infection is by using chemical substances such as dimilin®. Dimilin® though proven to be effective,is expensive and not environmentally friendly.Because of this,it is required to find cheaper and environmentally friendly way to treat Argulus sp.. This research aimed to test the effectivity and efficiency of herbal medicine ambon banana stem and papaya seed distillation. The research used four treatments, each repeated three times which were: positive control, dimilin®, papaya seed distillation, and banana stem distillation. Treatment was done post-infection after fish showed visual symptoms. Result showed that the best treatment was papaya seed distillation with survival rate of 80%, profit of Rp 1.365.000,-, R/C ratio of 1,31,and payback period of 0,6 year.
Keyword: batang pisang, biji pepaya, dimilin®, ikan mas koki, parasit Argulus sp.

Judul: Efektivitas Ekstrak Biji Nimba Azadirachta indica untuk Pengobatan Parasit Argulus sp. pada Ikan Mas Koki Carassius auratus
Abstrak: Goldfish is an ornamental fish favored by many people because of it’s body shape and color unique. One of the obstacle in the cultivation of goldfish is an ectoparasite that infected on it’s body and fin called Argulus sp. One of the plants that used as medicinal treatment is a neems. This study aimed to examining the effectivity of neems seeds extract in reinsing the Argulus sp in the goldfish. This research consists of 5 treatments with 2 replications, namely neems seeds extract with concentrations A (20 mg/l), B (40 mg/l), C (60 mg/l), K- (dimilin 1.5 g/l), and K+ (without neem extract and dimilin). The result shows that the treatments of neem seeds extract 40 mg/l cause reduction/slope the intensity level of Argulus sp. and increasing the survival rate of goldfish higher more than other neems seeds extract dossage.
Keyword: neem, goldfish, Argulus sp

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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