Judul: Control System for Hydro and Aquaponic Based on
Hybrid Solar System.
Abstrak: Akuaponik merupakan penggabungan sistem budidaya akuakultur dan budidaya berbasis air yang dapat menjadi solusi untuk mengatasi keterbatasan lahan dengan cara menggabungkan akuakultur dan hidroponik dalam lingkungan yang simbiotik. Penelitian ini mengkombinasikan pembudidayaan ikan lele dengan tanaman kangkung hidroponik dengan bantuan sistem Internet of Things (IoT). Internet of Things (IoT) merupakan sebuah cara yang memiliki kemampuan untuk menerima dan mengirimkan sebuah data melalui koneksi jaringan yang diintegrasikan dengan akuaponik. Pengguna dapat mengontrol sistem untuk proses menyalakan dan mematikan aktuator maupun pompa dari sebuah smartphone. Penelitian ini bertujuan merancang dan membangun sistem akuaponik yang menggunakan Internet of Things yang didukung Hybrid Solar System. Lokasi penelitian berada di green house SEAMEO BIOTROP. Proses yang dilakukan yaitu analisa profil beban, perancangan sistem, perencanaan tata letak PV, tata letak ruang kendali, perancangan sistem elektronik, desain sistem akuaponik, perancangan IoT, dan integrasi sistem. Hasil penelitian menunjukkan dalam perancangan sistem akuaponik menggunakan sistem IoT menghasilkan keadaan lingkungan budidaya akuaponik yang dapat dipantau. Keadaan lingkungan sistem saat dilakukan penelitian meliputi suhu sebesar 29,2°C dan kelembaban sebesar 84% yang dapat ditampilkan berbagai fitur pada Blynk. Pengukuran kangkung dan lele dilakukan pada hari ke-7 dan hari ke-14. Sistem ini dapat memudahkan pemantauan lingkungan akuaponik modern dengan menampilkan fitur monitoring suhu dan kelembaban secara real time., Aquaponics is a combination of aquaculture and water-based cultivation systems that can be a solution to overcome land limitations by combining aquaculture and hydroponics in a symbiotic environment. This study combines catfish farming with hydroponic kale plants with the help of an Internet of Things (IoT) system. Internet of Things (IoT) is a way that has the ability to receive and send data through a network connection that is integrated with aquaponics. Users can control the system for the process of turning on and off the actuator and pump from a smartphone. This study aims to design and build an aquaponic system that uses the Internet of Things which is supported by a Hybrid Solar System. The research location is in the SEAMEO BIOTROP green house. The processes carried out are load profile analysis, system design, PV layout planning, control room layout, electronic system design, aquaponics system design, IoT design, and system integration. The results showed that in designing an aquaponic system using an IoT system, the state of the aquaponic cultivation environment can be monitored. The state of the system environment when the research was carried out included a temperature of 29.2°C and a humidity of 84% which can be displayed by various features on Blynk. Water spinach and catfish measurements were carried out on the 7th and 14th days. This system can facilitate monitoring of the modern aquaponic environment by displaying temperature and humidity monitoring features in real time.
Keyword: Akuaponik, Hybrid Solar System, Internet of Things

Judul: Smart Water Quality Monitoring System for Controlling Vegetable Nutrient Needs in Aquaponic Farming
Abstrak: Akuaponik merupakan kombinasi budidaya akuakultur dan budidaya hidroponik dalam satu tempat dimana kotoran ikan dapat dimanfaatkan sebagai sumber nutrisi bagi sayuran. Dalam upaya memaksimalkan peluang pengembangan akuaponik yang ada, maka perlu diterapkan teknologi untuk melakukan monitoring secara berkala terhadap kondisi kualitas air kolam ikan yang akan dialirkan ke pipa berisi sayuran. Pembuatan sistem terkendali monitoring kualitas air dapat membantu petani untuk mengontrol kebutuhan nutrisi sayuran pada budidaya akuaponik dimana hasil monitoring dan kontrolnya dapat dilakukan melalui website. Pada penelitian ini, ikan nila dan pakcoy dipilih karena keduanya memiliki kebutuhan kondisi lingkungan yang cocok. Waktu pengukuran dilakukan selama 30 hari pada jam 07.30 dan 17.30. Pemberian larutan nutrisi dilakukan menggunakan pompa otomatis berdasarkan hasil pembacaan nilai sensor pH dan TDS. pH, TDS, dan suhu pada perlakuan sistem terkendali berada pada batas optimal sehingga memiliki pertumbuhan sayuran yang lebih bagus dibandingkan dengan sistem tidak terkendali., Aquaponics is a combination of aquaculture and hydroponic farming in one place where fish waste can be utilized as a source of nutrients for vegetables. In an effort to maximize the existing aquaponics development opportunities, it is necessary to apply technology to periodically monitor the water quality conditions of fish ponds that will be flowed into pipes containing vegetables. Making a smart water quality monitoring system can help farmers to control the nutritional needs of vegetables in aquaponic cultivation where the results of monitoring and control can be done through the website. In this study, tilapia and pakcoy were chosen because both have the need for suitable environmental conditions. The measurement time was carried out for 30 days at 07:30 and 17:30. The provision of nutrient solution is carried out using an automatic pump based on the reading of the pH and TDS sensor values. pH, TDS, and temperature in the sistem terkendali treatment are at the optimal limit so that they have better vegetable growth compared to manual control.
Keyword: tilapia, Nutrition, pakcoy, manual control, smart system

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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