Judul: Penjadwalan Proyek Menggunakan Metode Aljabar Max-Plus: Studi Kasus pada Pemasangan Pengolah Air PDAM Kota Semarang.
Abstrak: Project scheduling is part of the project management which planning the implementation of activities in a project in a structured manner and have a clear time limitation. The linkage among activities in a project can be transformed into the form of matrix which can be analyzed by using max-plus algebraic method. This matrix will then be applied in the calculation to obtain the required solution of the project scheduling, such as the optimum time, critical path, and a time tolerance.
Keyword: Max-Plus algebra, project scheduling, optimum time, critical path

Judul: Uji pemompaan dan pemanfaatan sumberdaya air tanah untuk irigasi di proyek pengembangan air tanah bagian proyek (P2AT BAGPRO) Madura
Abstrak: Tujuan penelitian ini adalah untuk mendapatkan luasan maksimum dan keuntungan maksimum dari suatu usahatani yang memanfaatkan sumberdaya air tanah. Metoda yang digunakan dalam optimisasi ini adalah Linear Programming dengan cara Simpleks. Penentuan debit produksi sumur dilakukan setelah dia- dakan uji pemompaan sebelumnya. Berdasarkan hasil uji pe- mompaan dan ketersediaan tipe pompa ditetapkan debit pro- duksi sumur sebesar 60 1/detik. Debit produksi yang ter- batas inilah yang dioptimisasikan agar dapat mengairi la- han yang seluas-luasnya atau untuk mendapatkan keuntungan yang setinggi-tingginya. Agar tujuan ini tercapai, diten- tukan pula pola tanam yang optimum. Dari hasil optimisasi luas lahan yang dapat diairi, debit produksi sebesar 60 1/det mampu mengairi lahan selu- as 48.60 ha dengan pola tanam padi-tembakau-jagung. Tapi setelah dilakukan optimisasi ternyata masih terdapat kele- bihan debit air. Kelebihan debit ini dapat mengairi lahan seluas 14.3 ha dengan dua kali tanam setahun, yaitu padi- tembakau. ...
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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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