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: Desain Penetrometer Digital Berbasis Mikrokontroler ATmega 8535
Abstrak: Until recently, most of soil strength measuring instrument still use spring scales penetrometer such as mechanical penetrometer. Mechanical penetrometer was difficult to use and has recording in accuracy because manual reading of spring scales and distance simultaneously. Moreover, mechanical penetrometer need three operator for operation. Therefore, digital penetrometer was developed to solve this problem. Penetrometer digital consists two main components : a electronics components and a mechanical components penetrometer. A mechanical component consists of a handle ring tranducer, penetrometer rod, and cone. Electronic components consists of sensor temperature LM35, strain gage, depth sensor , amplifier, microcontroller ATmega 8535, LCD screen, and battery 9 volts. Methodology use in this research was engineering design based on functional and structural design. Ergonomic of the developed digital penetrometer were condidered based on the Indonesians average anthropometries. Measurement principles the digital penetromter consist of: Compressive force was measured using strain gage sensors mounted on the ring transducer. Shinkage ring transducer strain gage sensor response by the form of the resistance value, because it is too small it takes amplifier, then processed by the microcontroller to be converted into units of kgf. Depth data obtained using ultrasonic sensors ranger. Ultrasonic signal transmission on soil will be reflected and received again by ultrasonic. From measuring the reflection will be further processed by a microcontroller and converted into units of cm. The data read by the LM35 temperature in the form of resistance. After that, change the resistance of the voltage to the microcontroller unit Celsius degree. The third sensor measurement results will be displayed through the LCD and stored in the EMS flash memory. Dimension of the digital penetrometer was 94 cm length, 12 millimeters rod diamater. Penetration of the developed penetrometer was done manually, while measurement of force was done by ring transduser, while depth of penetration was measured by ultrasonic sensor. Result of measurment was displayed on the LCD screen and recorded on EMS data flash memory.
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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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