Judul: Rancang bangun pengukur kemiringan pantai berbasis mikrokontroler dengan sensor accelerometer
Abstrak: The aim of this research is to design and construct an instrument to measure beach slope BS-Meter with accelerometer sensor. There were five stages in the design of this instrument, namely: casing design, electronic design, software design, laboratory tests and field trials. The casing is made of aluminum and 1-meter supporting board to make the instrument simple and easy to use. It is assumed, therefore, that within 1-meter there are no changes of the beach slope. An electronic system was built using the Arduino Mega as a microcontroller; while accelerometer sensor and GPS PMB-688 were used to obtain data slope and position, respectively. The data obtained is displayed on the Liquid Cristal Display (LCD) and stored on the SD Card. Laboratory test between BS-Meter and arc angle showed the different between -0.43 up to 0.96 degrees with a value of Root Mean Square Error (RMSE) 0.41. Thus BS-Meters have good accuracy. The Statistics Analysis of the t-test at a 95 percent with confidence interval = 0.05, showed that the value of the angle on the arc angle was not significantly different from the value of BS-Meter. Field test was also performed to compare the results of measuring BS-Meter with a Water pass. The results of field measurements of BS-Meter showed that the Palabuhanratu beach slope ranging from 2.16 to 8.32 degrees, while measurements using waterpass ranging from 2.42 to 11.10 degrees. Error or difference value of measurements between the BS-meter and Water pass is ranging from 0.13 to 3.00 degrees. The determination coefficient calculation (R2) between BS-meter and Water pass ranged from 0.97 to 0.99. Therefore, the BSMeter functions correctly and accurately.
Keyword: Bogor Agricultural University (IPB), accelerometer, Palabuhanratu, instrument, slope

Judul: Rancang Bangun Instrumen Pengukur Tinggi Gelombang Permukaan Laut Menggunakan Sensor Accelerometer
Abstrak: Ocean wave is one of the important parameter that affected the dynamic of the coastal. Ocean monitoring that provides real-time data is needed to help better understand of the ocean. The objective of this study are designing and constructing an instrument to measure the wave height. The instrument is designed by using accelerometer sensor and its placed on a buoy to follow the water particle movement on the sea surface. Electronics systems used ATmega32 microcontroller as the main control of this instruments. Data from the sensors stored on the MMC/SD card. Data analysis used MATLAB software by using zero crossing method to get the wave properties. The instruments measured at one fixed point by mooring system. Instrument had undergone fields test in Wakatobi, Southeast Sulawesi and moored at 8 meters depth. Data analysis in 22 hours recording in location showed that the average wave height ̅ was 0.72 meters; the significant wave height (Hsig) was 1.32 meters and the maximum wave height (Hmax) was 2.58 meters.
Keyword: wakatobi, wave, instrument, accelerometer

Judul: Leukemia pada kucing
Abstrak: Leukemia pada kucing adalah suatu penyakit yang sangat patogen, disebabkan oleh sejenis virus. Virus ini dikenal sebagai Feline Leukemia Virus atau FeLV. FeLV ini oleh beberapa ahli dikatakan hanya bersifat ganas pada hewan kucing. Penularannya bisa secara horizontal maupun congenital. Kucing pada semua tingkat umur dapat terserang oleh FeLV ini. Khusus pada bentuk "thymic leukemia", virus ini hanya menyerang anak-anak kucing berumur diba- wah 1 tahun. Kucing-kucing liar atau yang tidak terpeli- hara jarang sekali terinfeksi FeLV. Selain dari serangan virus FeLV itu sendiri, maka penyakit leukemia ini bisa disebabkan oleh beberapa fak- tor yang sudah ada dalam tubuh hewan dan sangat menunjang perkembangan penyakit ini, yaitu antara lain tumor, agen toksik, cedera oleh kecelakaan dan gangguan hemopoiesis. FeLV menyerang sel-sel darah dalam tubuh hewan se- hingga pembentukan darah berjalan tidak normal. Terlihat sel-sel darah yang belum dewasa sudah beredar dalam sir- kulasi darah. Bentuk dan jumlahnya tidak lagi seimbang dalam tubuh hewan kucing tersebut. Gejala klinis antara lain kekurusan, ikterus, anemia, lemah, anoreksia, dyspnoe, sulit menelan, batuk, dan membran mukosa pucat. Selain itu kelenjar pertahanan tubuh juga membengkak, kemudian terjadi hepatomegali, spleenomegali dan pembengkakan pada ginjal. Terbentuk massa tumor pada beberapa tempat. Secara biopsy pada sumsum tulang akan terlihat be- berapa perubahan. Sumsum tulang berwarna merah tua atau abu-abu. Konsistensinya lunak dan terdapat banyak sekali memproduksi sel darah putih. Melalui gambaran darah leukemia ini lebih mudah didiagnosa. Jumlah retikulosit rendah sekali. PCV 8-15%, hemoglobin menurun, sel darah putih (WBC) meningkat, lim- fosit meningkat, Alfaglobulin juga ada peningkatan, dan banyak eosinofil yang belum dewasa beredar dalam darah…dst
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