Judul: Pemodelan Tingkat Kemanisan Buah Melon Hasil Budidaya Tanaman dalam Sistem Hidroponik menggunakan Artificial Neural Network (ANN)
Abstrak: Buah melon merupakan salah satu buah yang diminati oleh masyarakat dikarenakan buah ini memiliki rasa yang manis dan segar. Agar buah dari tanaman ini dapat mencapai hasil yang diinginkan oleh konsumen, dibutuhkan beberapa parameter khusus yang dapat mempengaruhi tingkat kemanisan buah melon. Pada penelitian ini, digunakan varietas golden melon dan budidayanya dilakukan di dalam smart greenhouse dengan sistem irigasi drip irrigation. Pemodelan tingkat kemanisan buah melon dilakukan menggunakan Artificial Neural Network (ANN) dengan parameter input yang terdiri dari intensitas cahaya, kadar air media tanam, total luas daun tanaman, Umur Buah, dan letak buah. Pemodelan tersebut dilakukan menggunakan parameter pelatihan yang terdiri dari nilai learning rate sebesar 0.3, nilai momentum sebesar 0.6, jumlah iterasi sebanyak 8000 iterasi, dan jumlah hidden layer sebanyak 1 buah dengan jumlah node sebanyak 4 node. Plot tingkat kemanisan buah melon yang diprediksi menggunakan model ANN dan hasil pengukuran menghasilkan persamaan y = 1.1152x-1.3081 dengan R2 sebesar 0.9054 dan RMSE sebesar 0.06277525.
Keyword: ANN, golden melon, greenhouse, parameter lingkungan, pemodelan

Judul: Net Type Melon Fruit Grade Evaluation System with Artificial Neural Network and Fuzzy Logic Preprocess
Abstrak: This research utilize Artificial Neural Network (ANN), image processing and fuzzy logic as preprocess in evaluating melon fruit grade system. There are 66 samples out of 80 samples for ANN input with fuzzy logic in taste data normalization phase that suitable for organoleptic test. 49 unit image for image processing based on melon fruit characteristic were use for ANN input. Mutilayer neural network with 1 hidden layer and back propagation algorithm were use in ANN architecture for training, validation and prediction phases. The optimal ANN architecture were use 30 hidden layer node with 0.8 learning rate. The result are 90% total accuratecy in validation process consist of 100% prediction accuratecy of sweetness, 75% medium taste and 100% sour taste.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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