Judul: Optimasi Rute Pengiriman Barang Menggunakan Metode Heuristik: Studi Kasus di JNE Express Bandar Lampung
Abstrak: Meningkatnya minat masyarakat dalam berbelanja online saat pandemi berdampak pada ketatnya persaingan jasa pengantaran barang untuk mendistribusikan barang dalam waktu singkat dan harga terjangkau, sehingga diperlukan sebuah optimasi dalam menentukan rute pengantaran barang. Dalam karya ilmiah ini optimasi rute dilakukan dengan metode heuristik yaitu pendekatan algoritma Clarke-Wright saving dalam pengelompokan rute dan penggunaan metode nearest neighbour serta aplikasi Lingo 19.0 dalam pengurutan rute. Model diimplementasikan pada pengiriman barang di JNE Express Bandar Lampung. Hasil memperlihatkan bahwa penyelesaian menggunakan Lingo 19.0 lebih optimal dalam mengurutkan rute dibandingkan dengan metode heuristik., The increasing public interest in shopping online during the pandemic has an impact on the tight competition for goods delivery services to distribute goods in a short time and at affordable prices, so optimization is needed in determining the route of delivery of goods. In this scientific paper, route optimization is carried out using a heuristic method, namely the Clarke-Wright savings algorithm approach in route grouping and the use of the nearest neighbor method as well as the Lingo 19.0 application in route sequencing. The model is implemented in the delivery of goods at JNE Express Bandar Lampung. The results show that the solution using Lingo 19.0 is more optimal in sorting routes than the heuristic method.
Keyword: Clarke-Wright savings algorithm, distribution, JNE Express, nearest  neighbor method

Judul: Penerapan Metode Heuristik Dalam Supply Chain Network Untuk Menentukan Jalur Distribusi Terpendek
Abstrak: Supply chain management is a process of manufacture and delivery of goods to consumers. One of the main factors of supply chain management is supply chain networks. Supply chain networks consist of two main parts, i.e. , the location of production and the distribution process. Both are related to the determination of optimum distribution channels or routes from producers to consumers which are related to time, distance, and vehicle capacity. This problem is called with the Vehicle Routing Problem with Time Windows (VRPTW). This research work was conducted in the supply chain division of KATRACO CV, a private company that engaged in the distribution of fuel oil to gas stations and several companies in Central Java and surrounding areas. This research aims to design a supply chain network for VRPTW case to minimize the total distance. In this work we used a heuristic method , i.e. , sweep heuristic, saving heuristic, and the nearest depot heuristic as constructing route. We also used 2-opt, relocate, and exchange methods as route improvement methods to determine a better routes. Furthermore, VRPTW problem is solved using ILOG Dispatcher program version 2.1 and ILOG Solver version 4.4, which is run in Microsoft Visual C + + version 6.0.
Keyword: 

Judul: Synthesis of Biphasic Calcium Phosphate Made of Eggshells Through A Hydrothermal Method
Abstrak: Biphasic Calcium Phosphate mixed of hydroxyapatite and tricalcium phosphate. A hydrothermal method of synthesizing by mixing CaO as calcium source and (NH4)2HPO4 as phosphate source with distilled water. CaO got from calcination process made of eggshells. All samples were synthesized using hydrothermal reactor then followed by sintering process. The molar ratio of Ca and P for all samples was 0.5 M : 0.3 M. Hydrothermal temperature and sintering temperature were variated they are 250 ºC, 300 ºC for hydrothermal and 800 ºC, 900 ºC, 1000 ºC for sintering, higher treatment temperature, tricalcium phosphate appears. Final results of synthesis were characterized by using X-ray Diffraction and Fourier Transform Infrared. X-ray Diffraction patterns was ecompared with database Join Committee on Powder Diffraction Standards and found tricalcium phosphate and hydoxyapatite.
Keyword: biphasic calcium phosphate, hydrothermal, hydroxyapatite, tricalcium phosphate