Judul: Rancang Bangun Monitoring Sistem Irigasi Otomatis Berbasis GSM/GPRS
Abstrak: Irrigation is a human attempt to irrigate farmland. Various efforts have been done to build the concept of irrigation. However, the real implementation may create different problems. Basically, irrigation is related with the accessibility of ground water, which gives a large contribution to increase the agricultural production. A good irrigation system that can provide water in the correct level, amount, and time is required. The irrigation system should be well planned, designed, and operated efficiently to increase the agricultural production and ease of use in their operations. This research is a part of IMHERE IPB activity on the event of strengthening agricultural research for food security and sovereignty: advanced infrastructure for food security and sovereignty. The focus of this research is the development of automated irrigation system for food production land based on the data communication using GSM/GPRS. Arduino microcontroller was used as a client with GSM/GPRS shield to communicate with the internet as the server. Soil moisture was used as the sensor to detect the water content of farmland. LED was used to represent the real actuator of irrigation. If the water content detected by the sensor is less than 300, the actuator at the client will be turned on. In the system, data collected by the sensor was immediately sent to the server. Utilizing this scheme, it was found that the average time for connecting Arduino client to the server without delay was 40 seconds. The system was also tested by giving a certain delay, where sensor data was collected every 10, 30, and 60 seconds after the previous data from client was received correctly by the server. The results showed that there was no data loss due to the communication from Arduino client to the server. Furthermore, the data delivery was not affected by the addition of delay on the system.
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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: Karakterisasi Protein Bisa Ular Kobra Jawa (Naja Sputatrix) Setelah Perlakuan Penjemuran Dan Fotooksidasi
Abstrak: Bisa ular telah diketahui memiliki toksisitas yang menyebabkan kematian sekaligus merupakan sumber hayati yang penting sebagai obat untuk penyembuhan penyakit. Beberapa perlakuan dapat diberikan untuk menghilangkan toksisitas dalam bisa ular. Penelitian mengenai perlakuan penjemuran dan fotooksidasi untuk menurunkan efek toksik bisa ular Naja sputatrix belum dilakukan. Tujuan dari penelitian ini yaitu mengkarakterisasi kandungan protein dan aktivitas toksik pada bisa ular N. sputatrix setelah diberi perlakuan penjemuran dan fotooksidasi. Kadar protein pada bisa ular N. sputatrix yaitu 20.46% (b/v) yang meningkat setelah proses penjemuran, dan menurun setelah proses fotooksidasi. Bisa ular dipisahkan menjadi 5 pita protein utama dengan bobot molekul 14 hingga 108 kDa. Penjemuran selama 6 jam memiliki efek yang sama dengan perlakuan fotooksidasi yaitu menurunkan aktivitas LAAO sebesar 91% dan menghilangkan aktivitas antikoagulasi pada bisa ular, namun kedua perlakuan tersebut memiliki efek yang berbeda pada enzim PLA2 bisa ular. Penjemuran tersebut menurunkan 96% aktivitas PLA2 sedangkan fotooksidasi menghilangkan hampir seluruh aktivitas enzim tersebut (99.8%). Hasil ini menandakan bahwa penjemuran dan fotooksidasi dapat menurunkan aktivitas toksik dari bisa ular, namun tidak mempengaruhi karakter fisik dari kandungan proteinnya.
Keyword: asam L-amino oksidase, fotooksidasi, Naja sputatrix, bisa, fosfolipase A2