Judul: Vehicle Routing Problem pada Distribusi Produk Pertanian Menggunakan Metode Algoritma Genetika (Studi Kasus di Locarvest).
Abstrak: Penentuan rute distribusi yang juga disebut vehicle routing problem (VRP) merupakan salah satu permasalahan yang ada pada sistem distribusi. Permasalahan serupa juga dialami oleh Locarvest yang masih melakukan proses penentuan rute distribusi secara manual. Efisiensi dalam proses distribusi sangat diperlukan karena kegiatan distribusi memerlukan sumberdaya dan biaya yang cukup tinggi. Oleh karena itu, diperlukan optimasi dalam proses penentuan rute distribusi. Penelitian ini bertujuan menimumkan jarak dan biaya distribusi dengan melakukan pencarian rute distribusi terpendek. Metode penelitian ini diantaranya adalah pengumpulan alamat konsumen sebagai data utama dan pengamatan sistem distribusi yang terjadi di lapangan. Proses optimasi pencarian rute dilakukan menggunakan algoritma genetika dengan menerapkan model persamaan VRP. Hasil dari proses optimasi yaitu berupa rute dan total jarak tempuh terpendek. Berdasarkan hasil penelitian, didapatkan pengurangan total jarak tempuh 19.967 km terhadap 20 titik konsumen. Efisiensi yang diperoleh dengan menerapkan sistem optimasi yang dibuat adalah sebesar 16.50%. Penerapan metode algoritma genetika dapat diterapkan dalam permasalahan penentuan rute distribusi di Locarvest. Kedepannya perlu dihitung kelayakan secara finansial dari penerapan sistem penentuan rute distribusi yang telah dibuat.
Keyword: Algoritma Genetika, Distribusi, Vehicle Routing Problem

Judul: Penyelesaian Vehicle Routing Problem pada Pendistribusian Sayuran Dataran Tinggi Menggunakan Algoritme Genetika (Studi Kasus PT Saung Mirwan)
Abstrak: Vehicle routing problem (VRP) is an important issue on a transportation system that aims at minimizing the total vehicle mileage to reduce vehicle operating cost to a minimum. Vehicle routing problem belongs to the class of non-polynomial hard (NP-hard), which generally uses a heuristic approach to find a solution. In this time, Vehicle routing problem resolution will be applied to the distribution of highland vegetables from PT. Saung Mirwan as the vegetable distribution center. The problems that often arise in the distribution of highland plain vegetables is to how minimize the total of transportation costs without sacrificing the goal completion time to reduce the risk of the decline in the quality of vegetables during the trip. Issues will become increasingly complex if the vehicle routing problem is flexible to changes that occur in the limit or the value of decision variables. The problems encountered in this case include heterogeneous multi fleet VRP, single source, single trip, and multi-product. Therefore, this research used genetic algorithm optimization method (GA) to solve the problem. Genetic algorithm is one of the heuristic methods, which is analogous to the process of evolution by natural selection phase, crossover and mutation. In this paper a simulation is performed by searching the optimum solution to the location of the distribution as the destination points. Optimum solutions are obtained in the form of division of highland vegetable distribution channels that meet the existing constraints. As a solution, there was reduction of the distribution time of about 1 hour 58 minutes or an increase in time efficiency by approximately 32.22% and a reduction of the fleet utilization by 1 fleet or an increase of fleet efficiency by 14.28%.
Keyword: 

Judul: Sintesis BaTiO3 dari Campuran Ba(OH)2 dan TiO2 dengan Tambahan PbO
Abstrak: Piezoelectric material can generate electric field in response to applied mechanical stress. Conversely, they can stretch and contract in response to an electric field. This material can be used for many applications such as transducer, microphone, ultrasound, and pressure gauge. Barium titanate is a ferroelectric material with piezoelectric properties that can be synthesized easily. The aim of this study is to synthesis barium titanate from mixture of Ba(OH)2 and TiO2, also observe its optimum temperature and the effect of PbO addition. The method of synthesis was solid-state reaction and sol-gel method, then the products were characterized with x-ray diffraction (XRD). Based on XRD analysis, the optimum temperature for both methods was 800°C. Addition of PbO to BaTiO3 in the solid-state reaction formed a compound with formula of Ba1-xPbxTiO3. The addition has changed diffraction pattern peak at 2θ and strengthened its tetragonal structure. The best result was obtained at x of 0.5 which will form a compound of Ba0.5Pb0.5TiO3.
Keyword: