Judul: Produktivitas Budidaya Ikan Diskus Symphysodon sp. Pada Rasio Media-Ikan 2 hingga 5 Liter per Ekor
Abstrak: Increasing density will be followed by increasing production if it has a good environment and feed accomplished. The purpose of this experiment was to determine the optimal discus fish Symphysodon sp. production in term of growth, survival rate, feed efficiency and economic aspect. The design of the experiment was randomized complete design with 4 treatments and 3 replications. The discus seeds at average lenght of 2.60 + 0.01 cm and of weight 1.36 + 0.01 g were reared at volume of 60 liters. Tubificide feed was given twice a day at satiation level. 50% of the media in the aquarium was replaced with fresh water daily. The result showed that lowering media-fish ratio affected the weight and the growth, but did not affect the survival rate, the feed efficiency value and the length variety coefficient. Based on economic analyze, the highest gain was achieved by the media-fish ratio of 3 L/fish.
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Judul: Pengaruh penambahan hormon 17 alpha-metiltestosteron pada pakan buatan terhadap pertumbuhan ikan Diskus (Symphysodon aequifasciata)
Abstrak: Penelitian dilaksanakan dari bulan September 1994 Februari 1995, di Laboratorium Nutrisi IKan, Kolam Percobaan, Faperikan, IPB. Ikan diskus berumur 2 bulan (1.832.17 g/ekor) dipelihara dalam 15 akuarium yang masing-masing berukuran (50 x 40 x 35) cm³ dengan kepadatan 15 ekor per wadah. Pakan uji berbentuk pasta diberikan 5 kali sehari (pukul 8 pagi, 11 siang, 2 siang, 5 sore dan 8 malam) sebanyak 5-10% BB/hari. Penyiponan feses dilakukan setiap pagi dan air diganti sebanyak 30-80% atau sesuai kondisi air. Filter dicuci 2-4 hari sekali. Sampling dilakukan setiap 10 hari sekali. Rancangan percobaan berupa Rancangan Acak Lengkap, terdiri dari 5 perlakuan dan 3 ulangan. Perlakuan adalah penambahan hormon 17a-metiltestosteron pada pakan, perlakuan A (tanpa hormon), perlakuan B (1 mg/kg pakan), perlakuan C (5 mg/kg pakan), perlakuan D (10 mg/kg pakan) dan perlakuan E (30 mg/kg pakan). Uji statistik yang digunakan adalah uji sidik ragam (Uji F) pada tingkat kepercayaan 95%. Apabila hasil berbeda nyata, maka digunakan uji lanjutan Duncan. Parameter yang diamati adalah laju pertumbuhan harian (a), efisiensi pakan (e), protein efisiensi rasio (PER), tingkat kelangsungan hidup (SR) dan kualitas air sebagai penunjang…dst
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Judul: Pengembangan Sistem Rotasi Peta pada Perangkat Mobile tanpa Sensor Magnetometer
Abstrak: Due to the improvement of technology, the function of mobile phone has changed a lot. Nowadays, mobile phone is used not only for communication, but also to support the user’s activity. Many mobile phones now have Operating System (OS) and sensors like GPS and magnetometer. GPS is a sensor that can be used to identify any location, including the location of the user, while magnetometer can be used to identify direction. With data that come from GPS and magnetometer, we can build a navigation application that can rotate its map according to the rotation of the user. Meanwhile, in the Android Compability Definition Document point 1.6 until 2.2, Google have requirements for mobile phones to have GPS and magnetometer sensors if they want to use Android OS. But, since the release of 2.3.3 OS, Google has changed its requirements, allowing any mobile phones to have Android OS without having the magnetometer sensor. The objective of this research is to build an navigation application that can rotate without using magnetometer sensor. The value of the rotation degree is taken from last two position. To stabilize the value, Exponential Smoothing is used in filtering process. This system also use Haversine method to recognize whether the user is walking or driving/riding.
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