Judul: Sistem Penunjang Keputusan Manajemen Logistik Pada Agroindustri Berbahan Baku Karet (Studi Kasus Di Pt. Agronesia Divisi Inkaba).
Abstrak: Pertumbuhan sektor industri karet di Indonesia belum tumbuh secara maksimal karena adanya permasalahan dalam bidang logistik, yang dapat dilihat dari nilai Logistic Performance Index (LPI) Indonesia pada tahun 2012 berada pada peringkat ke-59 dari 183 negara. Untuk mengatasi permasalahan dalam bidang logistik, dibutuhkan kemampuan untuk mengambil keputusan secara cepat, efektif, dan efisien dalam manajemen logistik. Tujuan penelitian ini adalah mengembangkan sistem penunjang keputusan berbasis web yang dapat memberikan keluaran sebagai solusi atas permasalahan-permasalahan logistik yang ada. Pendekatan yang digunakan untuk proses dan analisis data yaitu analisis ABC, AHP, dan simulasi Monte Carlo. Model penyelesaian dan data tersebut dikemas dan diimplementasikan dalam perangkat lunak sistem pengambilan keputusan. Hasil perhitungan AHP menunjukkan bahwa Tunggal Abadi terpilih sebagai pemasok bahan baku SIR 50, PT. Tanggamus sebagai pemasok SIR 20, dan PT. Hosana mandiri sebagai distributor. Hasil simulasi Monte Carlo menunjukkan bahwa rata-rata permintaan SIR 50 adalah 6 600,23 kg/bulan dan SIR 20 sebesar 4 828,17 kg/bulan. Perangkat lunak sistem pengambilan keputusan ini telah diverifikasi dan divalidasi mampu memberikan rekomendasi pengambilan keputusan bagi manajemen logistik.
Keyword: AHP, decision support system, logistic management, Monte Carlo simulation

Judul: Sistem Penunjang Keputusan Manajemen Rantai Pasok Karet Alam dengan Pendekatan Green Supply Chain Operations Reference (Studi Kasus Di PT. Condong Garut).
Abstrak: Natural rubber is one of the important agricultural commodity for Indonesia and international scope. In Indonesia, especially in Java, one of the biggest industry of rubber was located in Kabupaten Garut, West Java. Approximately less than 95 km from the capital city of Garut, with a height of 600- 800 meters above sea level, there is a private company that has a total area of 2.741,81 hectares of rubber plantation area. Besides having a rubber plantation, the company has several rubber processing plant adjacent to the rubber plantations. Every day in the process of harvesting rubber latex in which the results of the harvest will be sent to a processing plant rubber. Latex has received factory will be transformed into a number of derivative products quality natural rubber, such as Ribbed Smoked Sheet and Brown Crepe. But in reality, the rubber plantation land productivity is on the decline so that the quality of the resulting latex was also less than satisfactory. One of the main problems is the management of the crude rubber plantation, such as the main treatment plant fertilization and weed eradication is rarely done. In addition, new clones, which have much higher productivity latex unrecognized. Low productivity of rubber plantations can also be caused by low quality seeds, farm land use that is not optimal, and poor maintenance of plants. If left longer the issue, it is feared the quality and quantity of the product also decreased. Decline in the quality and quantity of the product can reduce corporate profits as the number of high quality products that will be offered to consumers is limited. In fact, productivity declined latex not be a reason for the limitations of the company's revenue, since the company can maximize the production process so as to produce elections prospective potential consumers to buy quality products with a lot quantity can be determined. In addressing the limitations of the company's revenue for the problems that exist in the agrorubber, decision makers are faced with determining how rational decisions to be taken and make the right choice quickly and accurately. Decision support system is a form of evolution of electronic data processing and information management systems that are focused on helping top management and executives make decisions and rely on the flexibility, adaptability and rapid response, which can be controlled by the user (Suryadi and Ramdhani 1998). Decision support systems in this study can also help decision-makers to choose alternatives such decisions result of processing the information obtained. In addition the system is equipped with a selection of models that are representative of the problems that exist in the company, the development of this system is also integrated with supply chain management to facilitate any information and products, ranging from suppliers to consumers, in order to create a relationship orderly from upstream to downstream so that the measurement of the supply chain can be measured. The methodology of this research consists of the analysis of system requirements, formulation issues, and identification systems. Meanwhile, conducted the research stages of data collection and information by observation and
Keyword: 

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology