Judul: Pembuatan Automatic Rain Recorder untuk Pengukuran Curah Hujan Menggunakan Microcontroller ATmega8
Abstrak: Penelitian ini dilakukan untuk merancang prototype penakar hujan otomatis atau yang lebih dikenal dengan sebutan automatic rain recorder (ARR) dengan akurasi yang diperoleh dari hasil pengujian adalah 88,3%. ARR terdiri dari Microcontroller ATmega8 sebagai CPU (central processing unit) serta akuisisi data. Pewaktuan lokal menggunakan RTC (real time clock) serial dengan dilengkapi baterai litium sebagai backup catu daya. Media penyimpan data menggunakan memori AT24C256 dengan kapasitas hingga 32 Kbyte. Komunikasi dengan komputer menggunakan jalur serial RS232 untuk mengatur waktu RTC dan mengunduh data dari memori . Sensor sebagai penakar curah hujan menggunakan jenis tipping bucket dengan resolusi alat sebesar 0.2 mm. Air hujan yang masuk ke dalam penampung pada tipping bucket menghidupkan read switch dan memberikan logika high pada Microcontroller.
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Judul: Rancangan dan Uji Coba Otomatisasi Irigasi Kendi.
Abstrak: Development of science and technology today make automatic control have important role. It gives us ease to get performance in dynamic system. Automatic control be able to less routine work that operator always do. Automatic control tools have many kinds. Microcontroller ATMega328P is a kind of automatic control. The function is control and record data then save it. Automatic pitcher irrigation system constructions consist on hardware and software. Hardware consist on water level sensor and soil moisture sensor series, microcontroller, stackable SD card shield, real time clock, relay, battery and solenoid valve. Software is a program for microcontroller that used C/C++ language. Each sensor will be calibrated before use. Daily high water level and soil moisture data was data obtained. The data was obtained each 5 minutes. Data in microcontroller was obtained by record data on memory that was set in microcontroller. Calibration results express that microcontroller capability in monitoring high water level and soil moisture has high accuracy. Determination Coefficient calibration equation from the sensor is 0.955 for high water level sensor and 0.887 for soil moisture sensor. Furthermore, set point for control high water level is 5 cm for bottom margin and 14 cm for top margin.
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Judul: Onset, Durasi, dan Gejala Klinis Anestesi pada Kelinci New Zealand White (Oryctolagus cuniculus) dengan Kombinasi Ketamin-Xylazin Intramuskular
Abstrak: The aim of this research was to expound the onset, duration, and clinical signs observed on anaesthesia phase using ketamine-xylazine combination in New Zealand White rabbits. Fifteen New Zealand White rabbits (Oryctolagus cuniculus) were randomly subjected into three groups of five animals each. Those in group A were anaesthetized using a combination of 35 mg/kg ketamine and 5 mg/kg xylazine given i/m. Group B animals were anaesthetized using a combination of 40 mg/kg ketamine and 5 mg/kg xylazine while group C were anaesthetized using a combination of 45 mg/kg ketamine and 5 mg/kg xylazine, both given i/m. The result of this study indicated that the onset of anaesthesia marked by loss of pain response differ not significantly among the three groups (P < 0.05). Duration of anaesthesia and recovery significantly differ (P < 0.05) as the dose of ketamine increased. The onset of anaesthesia clinical signs within induction phase showed significant differences on sternal recumbency, lateral recumbency, and constricted pupil. Meanwhile the onset of anaesthesia clinical signs showed no significant differences (P<0.05) within recovery phase. It was concluded that onset of anaesthesia and clinical signs in induction phase were directly proportional as the ketamine’s dose increased. Meanwhile duration of anaesthesia and duration of recovery were inversely proportional with the dose increasing.
Keyword: anesthesia, ketamine-xylazine, New Zealand White, rabbit