Judul: Courses Scheduling Problem Case Study in SMA  Plus Liwaul Furqan Bogor
Abstrak: Penjadwalan merupakan masalah umum yang sering dijumpai di bidang ilmu matematika. Salah satu model matematika yang dapat digunakan untuk menyelesaikan masalah penjadwalan adalah Integer Linear Programming. Tujuan dari penelitian ini adalah menentukan model matematika untuk menyusun jadwal mata pelajaran dengan meminimumkan bobot mata pelajaran berdasarkan prioritas mata pelajaran tertentu di sesi awal terhadap periode waktu, kemudian mengimplementasikan model tersebut pada masalah penjadwalan mata pelajaran di SMA Plus Liwaul Furqan Bogor. Masalah penjadwalan mata pelajaran di Sekolah Menengah Atas (SMA) Plus berkaitan dengan guru, mata pelajaran, kelas, dan sesi waktu. Penjadwalan mata pelajaran ini diselesaikan dengan bantuan software LINGO 11.0. Hasil dari penelitian ini adalah solusi optimal berupa jadwal mata pelajaran yang memenuhi semua kendala yang diinginkan. Kata kunci: integer linear programming, mata pelajaran, penjadwalan, SMA Plus, Scheduling is a common problem that is often encountered in the field of mathematics. One of the mathematical models that can be used to solve scheduling problems is Integer Linear Programming (ILP). The purpose of this study is to determine a mathematical model to compile a schedule of subjects by minimizing the weight of the subjects based on the priority of certain subjects in the initial session against the period, then implementing the model in the subject scheduling problem at SMA Plus Liwaul Furqan Bogor. Subject scheduling issues in Senior High School (SMA) Plus relate to teachers, subjects, classes, and time sessions. The scheduling of these subjects is completed with the help of the LINGO 11.0 software. The results of this study are the optimal solution in the form of a schedule of subjects that meet all the desired constraints. Keywords: courses, integer linear programming, schedulling, SMA Plus
Keyword: courses, integer linear programming, schedulling, SMA Plus

Judul: Penjadwalan Mata Pelajaran di Sekolah: Studi Kasus di SMPIT Nurul Fajar Bogor
Abstrak: Scheduling is one of the problems faced by many institutions including schools. However, the conventional scheduling is often sub-optimal. In this work, the scheduling problem is modeled mathematically using integer programming approach. In this paper the problem of scheduling of courses was formulated into integer nonlinear programming. The model is then implemented to solve the courses scheduling problem in SMPIT Nurul Fajar School Bogor. The computer software LINGO 11.0 was used to obtain optimal solutions in the form of courses and satisfying all constraints of subject and teachers’ schedules.
Keyword: Bogor Agricultural University (IPB), school., courses, scheduling, integer nonlinear programming

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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