Judul: Penjadwalan dokter kamar darurat di RSCM menggunakan pemrograman linear integer
Abstrak: At an emergency unit of a hospital are generally posted several physicians for 24 hours for each and every day. The management unit of an emergency room usually has to deal with schedulling problem of physicians with time constraint of availability. This scheduling problem can be modeled as an integer linear programming (ILP) problem. ILP is an optimization problem with linear objective function, linear constraints, and integer variables. Scheduling problem is formulated in an optimization model, where the objective function is to minimize the operational cost of emergency room with the following constraints: (i) the time availability of physicians, (ii) the balanced work load for every physicians, (iii) holiday and dayoff determination of each physician. This paper discusses the schedulling of an emergency room’s physicians problem in the form of ILP, with a case study at Emergency Unit of Cipto Mangunkusumo Hospital (RSCM), Jakarta. The model is solved using Lingo 8.0 software. The solution obtained using ILP scheduling method is found to be more balanced than the corresponding solution using conventional method.
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Judul: Penjadwalan Kamar Operasi Menggunakan Pemrograman Linear Bilangan Bulat
Abstrak: Operating room scheduling in hospitals is undertaken based on a master surgery schedule, which can be formulated manually or by using mathematical programming. Some hospitals, such as state owned hospitals, receive budget or subsidy from the government to carry out its daily management, including surgery services. But for some reason, government may reduce the budget. The impact of budget cuts to hospitals is immediate. They must adjust the operating time and the number of operating rooms in services. In this work, operating room scheduling problem is modeled in the form of an integer linear programming. The objective function is formulated to maintain as much as possible the proportion of service time in each surgical division, although work hours and the number of operation rooms are reduced. As a case study, we consider a scheduling problem in a hospital with 6 surgical divisions and 4 types of operating rooms, which gives a total of 14 rooms. We discuss three schedulling adjustments, namely (i) model 1: total operating time is obtained by reducing the number of operating rooms, (ii) model 2: total operating time is obtained by reducing the number of operating rooms more than that of model 1, (iii) model 3: total operating time is obtained by reducing the total of work hours, while the number of operating rooms is as model 1. The results obtained are in the form of schedules that minimize the differences of time allocation between master surgery schedule and the new schedule.
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Judul: Suplementasi jagung dengan kacang kedelai dan kacang hijau dalam pembuatan tortila
Abstrak: Tortila telah dibuat dengan mencampur jagung, kacang kedelai dan kacang hijau dalam suatu adonan dengan berbagai perbandingan. Dalam pembuatan tortila, konsentrasi larutan kapur yang menghasilkan produk terbaik adalah 0,1 persen. Ternyata suplementasi jagung dengan kacang kedelai telah dapat menaikkan kadar lemak dari 0,49 persen menjadi 10,43 persen, juga kadar protein meningkat dari 7,85 persen menjadi 24,05 persen. Suplementasi jagung dengan kacang hijau menaikkan kadar niasin dari 10,39 ug/gram menjadi 19,27 ug/gram. Kekerasan tortila meningkat dengan makin lamanya penyimpanan. Selama penyimpanan, warna tortila yang paling disukai ialah tortila yang dibuat dari jagung dengan suplementasi kacang hijau.
Keyword: Zea mays;, Soybeans;, Vignaradiata;