Judul: Scheduling Problem of Teaching and Learning Activities: Case Study at BTA College Bogor.
Abstrak: At every beginning of semester, some colleges may face the same problem in setting up schedules of teaching and learning activities with constraints of time and availability of rooms. Generally, in every semester, the number of registered students in the college are not always the same. Thus, it will generate problem which related to the classroom capacities. In this work, the teaching and learning activities scheduling problem can be modeled as an integer linear programming problem (ILP). ILP is the problem of optimization with linear objective function and constraints, which involves some integer variables. The model of scheduling problem is formulated under the following constraints: (i) the availability of rooms, (ii) the time period of Monday-Wednesday-Friday or Tuesday-Thursday- Saturday, (iii) the number of courses and (iv) the availability of the toturs. In this work, we discuss how to formulate the scheduling problem o f teaching and learning activities into ILP by taking a case study at BTA college. To solve this model we use Lingo 8.0 software with branch and bound method.
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Judul: Courses Scheduling Problem at Junior High School with Integer Linear Programming.
Abstrak: The course scheduling at junior high school is an important task. The purpose of course scheduling is to allocate courses according to their classification and to satisfy teachers preferences on teaching and other constraints. In this paper, the preferences and constraints are accommodated by means of coefficients as weights attached into courses as well as teachers. The problem is formulated as a minimization problem. The preferences and constraints with smaller weights framework indicate more preffered time periods, and vice versa. The scheduling problem in this paper is modeled in term of integer linear programming (ILP) and Lingo 8.0 is used to solve the problem. The result of the research is a fully defined schedule for “Masa Depan” junior high school.
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Judul: Komposisi Asam Lemak dan Kolesterol Ikan Kembung Lelaki (Rastrelliger kanagurta) Akibat Proses Penggorengan
Abstrak: Ikan kembung lelaki mengandung PUFA yang baik untuk kesehatan. Pemanfaatan untuk konsumsi ikan kembung pada umumnya dilakukan dengan penggorengan. Penelitian dilakukan untuk menentukan komposisi asam lemak dan kolesterol setelah dilakukan penggorengan pada suhu 180 oC selama 5 menit. Tahap awal penelitian adalah menentukan perubahan proksimat ikan kembung, analisis asam lemak dan analisis kolesterol. Ikan kembung segar memiliki 11 jenis SAFA, setelah di goreng menjadi 9. MUFA pada ikan kembung segar berjumlah 6, setelah digoreng berjumlah 5. Nilai omega-3 kembung segar tertinggi terdapat pada DHA yaitu sebesar 15,54% dan EPA yaitu 4,66%, setelah dilakukan penggorengan masing-masing omega-3 mengalami penurunan sebesar 80% menjadi 2,0% dan 0,57%. Kolesterol pada ikan kembung segar memiliki nilai 50,54 mg/100 g, setelah dilakukan penggorengan kolesterol mengalami kenaikan yaitu sebesar 121,63 mg/100 g. Proses penggorengan menyebabkan perubahan pada komposisi asam lemak dan kolesterol ikan kembung.
Keyword: DHA, EPA, MUFA, Omega-3, proximate