Judul: Feeding Test of Prill Fat Wafer Supplements on Milk Production and Quality in Small-Holder Farms Kabupaten Boyolali
Abstrak: Penelitian bertujuan menguji pemberian wafer suplemen mengandung prill fat terhadap produksi susu, kualitas susu (lemak, Solid Non Fat (SNF), berat jenis, latosa, protein), persistensi produksi susu, dan perhitungan Income Over Feed Cost (IOFC). Penelitian ini menggunakan 18 ekor sapi perah dengan rata-rata bobot badan 435,76 ± 43,66 kg, produksi susu 10,25 ± 3,31 L/ekor/hari, periode laktasi 2, dan bulan laktasi 6 bulan. Penelitian terdiri dari 2 perlakuan dan 9 ulangan, yaitu P0 = ransum kontrol dan P1 = P0 + 400 gram wafer suplemen prill fat. Data yang diperoleh dianalisis menggunakan uji T-student. Hasil penelitian menunjukkan bahwa pemberian 400 gram wafer suplemen prill fat berpengaruh nyata (P<0,05) terhadap produksi susu, persistensi produksi susu, dan komponen lemak susu. Persistensi produksi susu sebesar 122,49%. Pemberian 400 gram wafer suplemen prill fat tidak berpengaruh nyata (P>0,05) terhadap SNF, berat jenis, protein, dan laktosa susu. Nilai IOFC yang dihasilkan yaitu Rp21.329. Pemberian 400 gram wafer suplemen prill fat mampu meningkatkan produksi, persistensi, komponen lemak susu dan IOFC., This study aimed to evaluate the effect of prill fat wafer supplements on milk yield, milk components (fat, Solid Non Fat (SNF), density, lactose, protein), milk yield persistency and Income Over Feed Cost (IOFC). This study involved 18 dairy cows with an average body weight of 435.76 ± 43.66 kg, milk yield rate of 10.25 ± 3.31 L/cow/day, lactation periods of 2, and lactation months of 6 months. This study consisted of 2 treatments and 9 replications, P0 = control ration and P1 = P0 + 400 gram prill fat wafer supplement. The data obtained were analyzed using T-test. The results of the study showed that the addition of 400 grams of prill fat wafer supplements significantly affected (P<0.05) milk yield and milk fat. Milk yield persistence was 122.49%. It did not significantly affect (P>0.05) SNF, density, protein, and lactose in milk. The IOFC value was Rp21.329. The effects of 400 grams prill fat wafer supplements was able to increase milk yield, persistence, milk fat, and IOFC.
Keyword: dairy cows, milk yield, milk components, prill fat, wafer supplement

Judul: Prill Fat Palm Oil 85% Palmitate (PF 85) Supplementation Against Manure Score, Milk Production, and Body Condition Score on Dairy Cows
Abstrak: Penambahan Prill Fat dalam pakan sapi perah bermanfaat untuk melindungi fermentabilitas rumen dan sebagai sumber energi pasca rumen yang dapat mengatasi rendahnya kualitas hijauan serta dapat meningkatkan produktivitas sapi. Pemberian lemak yang berlebih dapat memberikan dampak pada turunnya kecernaan terutama keceranaan serat yang dapat menyebabkan diare, depresi lemak susu, dan mobilisasi lemak tubuh. Penelitian ini bertujuan mengetahui dampak suplementasi prill fat terhadap manure score, produksi susu, dan BCS pada sapi perah laktasi. Penelitian ini menggunakan 10 ekor sapi laktasi yang diberi 2 taraf perlakuan yakni R0 = Ransum kontrol berupa hijauan + konsentrat + ampas tahu, R1 = R0 + 2% prill fat dengan masing-masing 5 ulangan. Hasil dianalisis dengan t-test student dua sampel bebas menggunakan program analisis data SPSS. Peubah yang diamati pada penelitian ini adalah konsumsi nutrien, manure score, produksi susu, dan Body Condition Score (BCS). Hasil penelitian menunjukkan bahwa suplementasi prill fat pada sapi perah laktasi meningkatkan produksi susu sebesar 2,52 L dan perbaikan BCS sebesar 0,08. Suplementasi prill fat tidak memberikan dampak negatif terhadap manure score dan konsumsi nutrien sapi perah laktasi., The addition of prill fat in dairy cattle's diet is very useful for protecting rumen fermentability. Prill fat also can be used as post ruminal energy source to overcome low-quality forage and increase productivity. However, adding too much fat might cause decreasing on digestibility especially fibre digestibility which leads to diarrhea, milk fat depression, and body fat mobilization. The aim of this study was to observe the impact of prill fat supplementation on manure score, milk production, and BCS on lactating dairy cows. This research used 10 cows which allocated into 2 treatments, R0 = control diet (forage + concentrate + tofu dregs) and R1 = R0 + 2% Prill fat 85% palmitate. Each treatment was repeated five times using individual cow as replication. Data were analyzed using t-test. The variables observed were manure score, milk production, BCS, and nutrient consumption. The results showed prill fat supplementation increased milk production by 2.52 liters/head/day and improved body condition score by 0.08 point. The supplementation did not give any negative impact on nutrient consumption and manure score in lactating dairy cows.
Keyword: BCS, manure score, milk production, nutrient consumption, prill fat

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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