Judul: Effectiveness of LED Light Spectrum Exposure on Growth Performance and Color Quality of Puntius denisonii Fish
Abstrak: The Puntius denisonii fish is a type of freshwater ornamental fish that has a characteristic silver body and torpedo torpedo body shape. The purpose of this study was to analyze the growth performance and changes in the color quality of Puntius denisonii fish due to exposure to different light spectrum in the maintenance medium. The maintenance of Puntius denisonii was carried out in an aquarium measuring 30 x 30 x 30 cm3 for 21 days. The research process used a completely randomized design with five treatments and three replications. The type of treatment in this study consisted of control (room light), and a spectrum of LED light with different wavelengths and different colors including green, blue, red, and white. The results of research on manipulation of the cultivation environment using a light spectrum namely the color quality with the best results found in the red LED spectrum treatment, and growth with the best results is in the green LED spectrum.
Keyword: LED, Puntius denisonii, light spectrum

Judul: Efektivitas Paparan Spektrum Cahaya Led Terhadap Pertumbuhan Dan Kualitas Warna Ikan Rainbow Boesemani Melanotaenia Boesemani
Abstrak: Penelitian Ini Bertujuan Untuk Mengevaluasi Pertumbuhan Dan Kualitas Warna Ikan Rainbow Boesemani Dengan Paparan Spektrum Cahaya Berbeda. Ikan Rainbow Boesemani Berukuran 1,46±0,23 G Dengan Rataan Panjang 4,67±0,25 Cm Dipelihara Dalam Akuarium Berukuran 33×50×40 Cm Selama 60 Hari. Pakan Yang Digunakan Adalah Pellet Terapung Komersial. Pemberian Pakan Dilakukan Sebanyak Dua Kali Sehari Secara At Satiation. Penelitian Dilakukan Dengan 5 Perlakuan Dan 3 Ulangan Yaitu Perlakuan K (Kontrol), P (Led Putih), M (Led Merah), H (Led Hijau), Dan B (Led Biru). Hasil Penelitian Menunjukkan Bahwa Paparan Cahaya Led Biru Memberikan Pengaruh Pertumbuhan Terbaik. Laju Pertumbuhan Harian 0,65±0,12%, Pertumbuhan Bobot Mutlak 0,01±0,002 G/Ekor/Hari, Dan Efisiensi Pakan 32,68±10,59%. Paparan Led Merah Memberikan Pengaruh Kualitas Warna Terbaik Berdasarkan Keragaan Warna Secara Visual Sebesar 51,32±1,10% Untuk Warna Biru, 51,58±0,97% Untuk Warna Orange Dan Jumlah Kromatofor Sebesar 461±11 Sel. Kadar Glukosa Berkisar Antara 72,42±29,60-99,13±5,68 Mg Dl-1. Stamina Ikan Yang Melawan Arus Berkisar Antara 61,26±38,74-82,33±17,67%.
Keyword: Led, Pertumbuhan, Kualitas Warna, Rainbow Boesemani Melanotaenia Boesemani, Spektrum

Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
Keyword: