Judul: Pemilihan Pemasok Berdasarkan Kualitas Bahan Baku dalam Supply Chain Network dengan Integer Linear Programming
Abstrak: Supplier is a provider of raw materials needed by company to produce goods and services. Raw materials shipped from supplier to manufactures have different qualities. The quality of raw materials affects purchasing costs for raw materials and reprocessing cost in manufactures. Raw material with high quality does not require reprocessing but its purchasing price is higher than other raw material. Although their purchasing prices are lower, raw materials with medium or low quality still need reprocessing. In this manuscript, supplier selection problem is formulated in term of integer linear programming, where the objective is to maximize the company profit. As an implementation, we considered a Noodle XYZ company with supply chain consisting of 5 potential suppliers, 3 manufactures, 3 warehouses, and 4 customers. The company selects suppliers based on the quality of raw materials offered, cost of hired suppliers, and distribution of the product. The optimal solution is obtained in term of suppliers to be selected and distribution of the product which maximizing profits.
Keyword: raw materials quality option, supplier selection, supply chain

Judul: Analisis Perencanaan Kebutuhan Bahan Baku dan Penetapan Prioritas Pemasok pada PT. Citra Abadi Sejati
Abstrak: Material is one of an important asset for a company which becomes the factor of success production process. This research is to obtain exact technic on making Material Requirement Planning and choosing the appropriate supplier in order that the material can be supplied precisely in quality, quantity and time as well. The technic of fabric requirement planning in the most minimal inventory cost is LFL in Rp. 675.900, EOQ in Rp. 1.029.471, the company technic in Rp. 3.218.700, and LFL + SS as much as Rp. 3.319.199. The technic with the most minimal cost for thread is LFL in Rp.7300, EOQ in Rp. 105.914, the technic used by company in Rp. 1.018.072, and LFL + SS as much as Rp. 2.364.996. Determining the fabric supplier have three criteria, they are quality, price, and lead time. The alternative for each fabric supplier with the best order is in the value of SilverReed in 0,525, Winitex in 0,261 and Far-East in 0,214. Determining the thread supplier have four criteria, they are quality, price, paymenterm and fleksibility. The alternative for each thread supplier rank is in the value of Coats in 0,613, Gunze in 0,264 and Amann in 0,124.
Keyword: EOQ., LFL, supplier priority, material

Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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