Judul: Smart Fish Feeder Berbasis IoT Untuk Kolam Budidaya Air Tawar
Abstrak: Smart Fish Feeder Berbasis IoT Untuk Kolam Budidaya Air Tawar. Dibimbing oleh MAHFUDDIN ZUHRI Dan ARDIAN ARIF SETIAWAN. Smart Fish Feeder adalah perangkat otomatis yang dirancang untuk memberikan pakan ikan menggunakan teknologi IoT, yang memungkinkan pemantauan dan pengendalian pakan secara efisien. Penggunaan manual dalam pemberian pakan kurang efisien dan dapat mempengaruhi kualitas air serta pertumbuhan ikan jika takaran tidak sesuai. Penelitian ini mengembangkan Smart Fish Feeder berbasis IoT untuk kolam budidaya air tawar, memudahkan pemilik dalam proses pemberian pakan dan pemantauan melalui aplikasi android. Sistem ini menggunakan sensor ultrasonik untuk mengukur dan mengkonversi jarak pakan ke dalam volume yang ditampilkan pada aplikasi. Selain itu, alat ini dapat mengatur jadwal, takaran pakan, dan menyebarkannya secara merata. Hasil penelitian menunjukkan bahwa Smart Fish Feeder yang terkoneksi dengan internet dapat memantau ketersediaan pakan, mengontrol jadwal dan takaran pemberian pakan, serta menyebarkan pakan secara merata. Kata kunci: IoT, jadwal dan takaran, ketersediaan pakan, penyebaran pakan, Smart Fish Feeder, The Smart Fish Feeder is an automatic device designed to feed fish using IoT technology, allowing efficient monitoring and control of feeding. Manual feeding methods are inefficient and can negatively impact water quality and fish growth if feeding amounts are incorrect. This research develops an IoT-based Smart Fish Feeder for freshwater aquaculture ponds, facilitating feeding and monitoring via an android application. The system uses an ultrasonic sensor to measure and convert feed distance into volume, displayed on the app. Additionally, it can schedule and control feed amounts and distribute feed evenly. The results demonstrate that the internet-connected Smart Fish Feeder can monitor feed availability, control feeding schedules and amounts, and evenly distribute feed.
Keyword: Fish Feeder

Judul: Early Warning System for Water Quality Parameters in  Tilapia Aquaculture Based on IoT
Abstrak: Akuakultur ialah bentuk upaya produksi biota atau organisme perairan menggunakan penerapan teknik domestikasi. Salah satu akuakultur yang popular adalah budidaya ikan nila. Kondisi alam, kemudahan dalam membudidayakannya dan permintaan pasar yang tinggi pada akhirnya menggiring ikan nila menjadi komoditas yang potensial. Pemantauan kualitas air pada kolam budidaya ikan nila saat ini masih banyak dilakukan dengan cara manual dengan langsung mengukur kualitas air ke kolam budidaya, hal ini tentunya tidak efektif dan memerlukan waktu yang lama serta tidak efisien. Pembuatan sistem pengukuran dan monitoring parameter kualitas air pada budidaya perikanan berbasis Internet of Things ini dapat membantu pemilik dalam proses pengukuran dan pemantauan dimana hasil pemantauan dan kontrolnya dapat dilakukan menggunakan website. Waktu pemantauan dan pengukuran suhu, TDS, pH, dan dissolved oxygen dilakukan selama 1 hari pada pukul 09.00, 14.00, dan 17.00. Suhu dalam proses pemantauan kolam berada pada kategori aman, TDS berada pada kategori aman, pH berada pada kategori peringatan dan dissolved oxygen pada kategori berbahaya., Aquaculture is a form of aquatic organism production that involves the application of domestication techniques. One popular form of aquaculture is the cultivation of tilapia fish. The natural conditions, ease of cultivation, and high market demand have made tilapia fish a potential commodity. Currently, monitoring the water quality in tilapia fish cultivation ponds is often done manually by directly measuring the water quality in the ponds, which is neither effective nor efficient. The development of an Internet of Things-based system for measuring and monitoring water quality parameters in fisheries can assist owners in the measurement and monitoring process, with the results accessible through a website. Water quality parameters such as temperature, total dissolved solids (TDS), pH, and dissolved oxygen were monitored during the day at 09:00, 14:00, and 17:00. Temperature was within the safe category, TDS was in the safe category, pH was in the warning category, and dissolved oxygen was in the dangerous category.
Keyword: Monitoring, Tilapia fish, Water quality, Website

Judul: Karakteristik Kimia Kayu Reaksi Ulin (Eusideroxylon zwageri T. et B.)
Abstrak: Reaction wood which formed in hardwood generally has a lower klason lignin content, higher acid soluble lignin content, and higher syringil unit than opposite wood. Ulin wood (E. zwageri) contains high klason lignin and low acid soluble lignin contents which closed to lignin characteristic of softwood. This experimental aimed to study the difference of chemical characteristic of reaction wood (klason lignin content, acid soluble lignin content, and lignin monomer composition) and polysaccharides content which formed in E. zwageri stem. Visually, the reaction wood part was formed in upper side of leaning stem. Klason lignin content in reaction wood part was lower (32.71%) than opposite wood part (33.74%). However, the lowest lignin content was found in the side wood part (28.15%). Lignin of E. zwageri was composed by syringyl and guaiacyl monomer with average of syringil to guaisyl ratio 0,2. Acid soluble lignin content in E. zwageri was very low (0.69%) that positively correlated with the proportion of syringil unit in lignin. Polysaccharide content of reaction wood part (63.66%) was higher than opposite wood part (62.88%), but the highest content polysaccharides presented in the side wood part (64.19%).
Keyword: Polisaccharide, syringil-guaiasyl ratio, lignin, E. zwageri, reaction wood