Judul: Scheduling of Parallel identical Packaging Machine in Yoghurt Industry Using Integer Linear Programming.
Abstrak: Several yoghurt industries are using identical packaging machines for their packaging processes. Because of short consumption’s life-time of yoghurt, many different products must be produced on a daily basis. Moreover, yoghurt production must exist sequently and at every production process shift cost should be setup. All those constraints increases complexity in taking the schedulling decision process production. Efficient scheduling problems on those yoghurt production processess could be formulated as Integer Linear Programming (ILP) problems. Minimizing amount of production costs such as the changeover cost, the inventory holding cost, the machine utilization cost, and an additional cost item that penalizes overtime utilization of the machine used as objective functions in this research. This minimizing problem could be solved by Branch-and-Bound method. The implementation of the method using Lingo 8.0 software. Produces an optimal value of the minimum cost. In addition, the research also produces packaging scheduling in containers of parallel identical packaging machines.
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Judul: Masalah Pendistribusian Barang menggunakan Pemrograman Linear Integer
Abstrak: One of the important things in determining the distribution of products is searching distribution scenario that minimizes the total travel time from the depot to distributors, where the problem can be modeled as an Integer Linear Programming (ILP). In this work, we implemented the model to a candy company, where we had to deliver products to 5 distributors within 12 periods. Constraints should be considered are distributor inventory level, warehouse capacity, demand-supply balance, expiration date of product, and the maximum duration of each period of delivery. We here assumed that the delivery process to distributors is conducted through a predetermined order. The output of this model includes the retour trip between depot and distributors as well as the delivered amount of products in each period.
Keyword: minimize time traveling, integer linear programming, distribution of products

Judul: Karakteristik Suara Song Murai Batu (Copsychus malabaricus) yang Dipelihara di Penangkaran.
Abstrak: Murai batu (Copsychus malabaricus) merupakan burung pesuara Indonesia yang memiliki suara song yang bermelodi dan lantang, memiliki variasi lagu suara yang tidak terputus-putus yang dilakukan dengan satu tarikan nafas. Penelitian ini bertujuan untuk menganalisis karakter suara song burung murai batu yang tidak terlatih dan yang terlatih. Penelitian dilakukan pada bulan April sampai Juni 2017 di 3 penangkaran di Bogor. Perekaman suara song murai batu dilakukan dengan menggunakan mikrofon Sennheiser ME66 dan alat perekam Sony PCM-D50. Parameter yang diukur adalah oschilogram, spectogram, tipe syllable, durasi, amplitudo, frekuensi, dan kekuatan yang dianalisis menggunakan software Raven Pro 1.4 dan dilanjutkan dengan uji T. Hasil analisis suara song burung murai batu menunjukan bahwa murai batu terlatih menghasilkan suara song yang cepat dan tidak jeda antar syllable sehingga terdengar seperti pengulangan suara song. Burung murai batu yang tidak terlatih menghasilkan suara song dengan jarak yang jelas antar syllable dengan amplitudo yang rendah.
Keyword: amplitudo, durasi, frekuensi, kekuatan, murai batu, suara song, syllable