Judul: Synthesis and Application of Ba0.55Sr0.45TiO3 Film as Light Sensor and Temperature Sensor In Auto Dryer System Model of Agricultural Products Based on Microcontroller ATMega8535
Abstrak: An automatic dryer system model has been designed and realized with the dimension 50 cm x 50 cm with louvre roof models for the drying process of agricultural products based on microcontroller ATMega8535. The system worked through a microcontroller commands originating from the sensor. The sensor used is BST films prepared by Chemical Solution Deposition method (CSD) and spin coating at 3000 rpm rotational speed for 30 seconds with varying substrate treatment (enhancement (non-heated) and depletion (heated at 800 °C)) and the temperature of the heating at 800 °C, 850 °C and 900 °C for 15 hours. Furthermore, films that were obtainedthen were characterized as a light sensor and a temperature sensor. Film enhancemant-850 °C (best film characterization) was used as a light sensor and a temperature sensor. This automatic dryer system model was composed of a hardware and software. Light sensor, temperature sensor, microcontroller ATMega8535, servo motors, relays, and dryer are part of the hardware that was used. The software that was used was made using software Code Vision AVR C language C as the programming language. In principle, when the power supply was turned on, the power supply provided the required input voltage of each electronic circuit that was used. The system used two pieces of BST films that were used as a light sensor and a temperature sensor. BST light sensor will detect the presence or absence of light received, while the BST temperature sensor was used to read the changes in the room temperature conditioning system automatically. Data received from a light sensor BST and a temperature sensor BST then sent to the microcontroller. The microcontroller will process the data that was read from both BST sensor. When data read from the BST light sensor is bright, the microcontroller will give the command to each servo motor to open right and left side of the roof. The microcontroller also will give the command to disable the relay driver so that the dryer is off. If the data read from the BST light sensor is dark, then the microcontroller will give the command to each servo motor to close right and left side of the roof. The microcontroller also will give the command to activate the relay driver so the dryer is on. When the data read from the BST light sensor is dark, if the data read from the BST temperature sensor is ≤ 60 °C, the microcontroller will give the command to activate the relay driver so the dryer is on. If the data read from the BST temperature sensor > 60 °C, the microcontroller will give the command to turned off the relay driver so that the dryer is turned off until the data is read by the BST temperature sensor reaches 30°C. When the data read by BST temperature sensor <30 °C then the microcontroller will give the command to reactivate the relay driver so the dryer is on.
Keyword: Ba0.55Sr0.45TiO3, sensor, operational amplifiers, ATMega8535, liquid crystal display

Judul: Penerapan film tipis Ba0,25Sr0,75TiO3 (BST) yang didadah ferium oksida sebagai sensor suhu berbantukan mikrokontroler
Abstrak: Material ferroelektrik yang berasal dari Barium Stronsium Titanat (BST), diharapkan akan memiliki energi yang tinggi karena memiliki konstanta dielektrik dan kapasitas penyimpanan muatan yang tinggi [1]. Material yang dihasilkan dari proses pendadahan BST terhadap ferium ini, diharapkan akan menjadi sensor suhu. Ketika material BST dan BFST (Barium Ferium Stronsium Titanat) dikenai suhu (dalam kata lain, material mengalami perubahan suhu), maka material tersebut menghasilkan beda potensial, dan material ini dapat diaplikasikan sebagai sensor suhu berbasis mikrokontroler. Mikrokontroler yang digunakan ialah ATmega8535 yang sudah terdapat Analog Digital Converter (ADC) internal. Beda potensial yang dihasilkan akan dikuatkan dengan penguat tegangan (OpAmp) dan akan diolah menjadi data digital pada ADC internal ATmega8535. Data digital yang masuk akan diolah Mikrokontroler dan ditampilkan dalam tampilan aplikasi desktop berbasis Delphi 7. Material yang diujikan ialah material BST, BFST 5%, dan BFST 15%.
Keyword: BST, Sensor suhu, ATmega8535, ADC, Delphi 7, Bogor Agricultural University

Judul: Kajian Histopatologi Kasus Splenitis Pada Burung Elang Jawa (Spizaetus bartelsi)
Abstrak: Elang Jawa (Spizaetus bartelsi) adalah spesies burung pemangsa yang langka dan endemik di Pulau Jawa. Burung ini juga ditetapkan sebagai simbol negara Republik Indonesia. Catatan penyakit pada spesies ini sangat terbatas. Penelitian ini mengkaji patomorfologi peradangan limpa (splenitis) di Elang Jawa, yang mati secara mendadak setelah menunjukkan gejala tortikolis. Organ diperoleh dari nekropsi, lalu dicetak dalam paraffin, dipotong 3 μm dan diwarnai dengan hematoksilin dan eosin (HE) untuk morfologi umum. Selain itu, pewarnaan khusus yaitu Ziehl-Neelsen (ZN), periodic-acid-Schiff (PAS), dan Congo-red juga dilakukan. Pewarnaan ZN untuk mewarnai bakteri tahan asam, PAS untuk mewarnai jamur dan hialin, dan Congo-red untuk mewarnai amiloid. Secara Histopatologi (HP), lesio utama adalah nekrosis multifokal pada limpa ditandai dengan hialinisasi pulpa putih; sel-sel inflamasi ditemukan pada subkapsular dan sinus peritrabekular limpa. Fokus nekrosis pada limpa terwarnai negatif dengan ZN dan Congo-red, namun, fokus nekrosis tersebut terwarnai positif dengan PAS. Selain itu, temuan histopatologi lain adalah nodul granulomatosa di paru-paru dan hifa jamur yang terwarnai positif oleh PAS. Temuan ini menunjukkan bahwa imunosupresi karena splenitis diduga menjadi penyebab terjadinya pneumonia mikotik granulomatosa. Etiologi splenitis dalam kasus ini belum teridentifikasi.
Keyword: limpa, nekrosis multifokal, pneumonia, Spizaetus bartelsi, splenitis