Judul: The Effectiveness of Commercial Tannins on Dairy Cows Fed Complete Feed Silages in Milk Production and Milk Quality
Abstrak: Tujuan dari penelitian ini adalah untuk mengevaluasi pengaruh pemberian tanin komersial terhadap produksi dan kualitas susu sapi perah. Penelitian ini menggunakan desain Rancangan Acak Kelompok dengan 3 perlakuan dan 5 ulangan menggunakan 15 ekor sapi laktasi Friesien Holstein. Perlakuan yang diberikan adalah P1 (sebagai kontrol dengan silase, hijauan dan konsentrat tanpa tanin komersial), P2 (P1 + 10 g tanin komersial setara 0.08% dalam konsentrat) dan P3 (P1 + 15 g tanin komersil setara 0.12% dalam konsentrat). Data dianalisis menggunakan analisis of varian (ANOVA) apabila diperoleh hasil yang berbeda nyata dilanjutkan dengan uji lanjut kontras ortogonal. Hasil penelitian menunjukkan bahwa pemberian tanin pada pakan sapi perah tidak berpengaruh signifikan terhadap konsumsi pakan, produksi susu, kualitas susu (protein, laktosa, solid nonfat dan total solid), bobot badan, pertambahan bobot badan dan body condition score. Namun berpengaruh signifikan terhadap kualitas susu yaitu menurunkan lemak susu dibanding kontrol.
Keyword: commercial tannin, dairy cows, milk production, milk quality

Judul: Ketersediaan Serat Efektif dan Kandungan Tanin Ransum Sapi Perah pada Peternakan Rakyat di Lembang serta Pengaruhnya Terhadap Produksi dan Kualitas Susu
Abstrak: Fiber is one of the important nutrients in the diet, especially for ruminants because fiber is a source of energy for the rumen microbes. Availability fiber is an important factor in the formulation of feed for ruminants because of shortage and excess fiber would affect the health of ruminants. This study aims to determine the feed materials used and the adequacy of nutrients, especially fiber effectively given to cattle. This research was carried out by conducting exploratory interviews and sampling of feed materials. Data were collected in five villages with each village consists of 6 breeder. Preparation of rations for ruminants is currently expected not only by BK, CP and TDN but also by fibers mainly NDF and ADF. NDF and ADF content of feed materials ranging from 26.45% - 92.13% and 22:44% - 54.51%, with the total number of awarding NDF and ADF in the ration of 65.33% and 38.57%. Variations in the content of NDF and ADF on feed materials resulting from forage sources used are also varied, especially in the dry season, so that farmers are using agricultural waste as a substitute source of fiber from grass. Agricultural waste contains anti-nutritional tannins especially when excessive aka damage the health of livestock. Tannin content ranging from 0.03%, feed ingredients - 2:43% with tannins in the ration of 0.023%. NDF and ADF content of the ration exceeds the needs of dairy cows which led to reduced energy density and can reduce production. Tannin content in the diet is very small so it does not interfere with the health of livestock.
Keyword: fiber, tanin, Neutral Detergent Fiber, Milk Cow, Lembang

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.
Keyword: