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: Analisis Perbandingan Durasi Penjadwalan Proyek antara Metode CPM dan PERT  pada Pembangunan Gedung Business Center Pertamina Jakarta
Abstrak: Dalam proyek konstruksi sering terjadi ketidaksesuaian antara jadwal perencanaan dengan realisasinya di lapangan yang akan menyebabkan keterlambatan dalam sebuah proses pembangunan. Oleh karena itu, dibutuhkan analisis perbandingan durasi penjadwalan proyek menggunakan metode CPM dan PERT dengan bantuan aplikasi Microsoft Office Project. Penelitian ini bertujuan untuk menentukan jalur kritis, durasi percepatan, serta persentase probabilitas yang dihasilkan dengan kedua metode tersebut pada Gedung Business Center Pertamina Jakarta. Setelah dilakukan analisis durasi penjadwalan didapatkan jalur kritis yang dilalui dari pekerjaan tanah (A), pekerjaan beton (B), pekerjaan penyelesaian (H), dan pekerjaan elektronik (P) dengan total float = 0. Selain itu, didapatkan pada metode CPM durasi yang dihasilkan adalah 364 hari sedangkan pada metode PERT sebanyak 378 hari. Lalu, nilai persentase probabilitas yang dihasilkan didapatkan bahwa bahwa proyek ini selesai dalam 399 hari sesuai dengan waktu perencanaan dengan peluang sebesar 99,13% tepat waktu, dalam 356 hari sesuai dengan metode CPM sebesar 27,76% tepat waktu, dan dalam 378 hari sesuai dengan metode PERT sebesar 72,24% tepat waktu., In construction projects, discrepancies often occur between the planning schedule and its realization in the field, which will cause delays in the construction process. Therefore, a comparative analysis of project scheduling duration using the CPM and PERT methods with the help of the Microsoft Office Project application is needed. This research aims to determine the critical path, acceleration duration, and probability percentages generated using these two methods at the Pertamina Jakarta Business Center Building. After analyzing the scheduling duration, it was found that the critical path for earthwork (A), concrete work (B), finishing work (H), and electronic work (P) was obtained with a total float = 0. In addition, the CPM method obtained a duration that was the result is 364 days while the PERT method is 378 days. Then, the resulting probability percentage value shows that this project was completed in 399 days according to the planning time with a chance of 99.13% on time, in 356 days according to the CPM method of 27.76% on time, and in 378 days according to with the PERT method 72.24% on time.
Keyword: Acceleration duration, CPM, Critical path, PERT, Probability percentage

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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