Judul: Penjadwalan Pegawai Menggunakan Integer Linear Programming: Studi Kasus pada Pegawai Non Operasional Stasiun Depok
Abstrak: Stasiun Depok adalah instansi yang berada di bawah naungan PT Kereta Commuter Indonesia (KCI) yang memiliki sejumlah pegawai dengan beberapa pembagian tugas kerja. Penjadwalan pegawai merupakan salah satu masalah yang dihadapi oleh pihak Stasiun Depok. Peraturan yang ditetapkan stasiun, ketersediaan banyaknya pegawai dan sistem pembagian kerja menjadi faktor penentu dalam sistem penjadwalan. Permasalahan penjadwalan pegawai di Stasiun Depok ini dapat dimodelkan sebagai masalah Integer Linear Programming (ILP). ILP merupakan teknik optimisasi dengan fungsi objektif linear, fungsi kendala linear dan variabel berupa bilangan bulat. Tulisan ini membahas formulasi masalah penjadwalan pegawai stasiun dalam bentuk ILP dengan studi kasus pada pegawai non operasional Stasiun Depok dengan fungsi objektif meminimumkan jumlah pegawai yang dipekerjakan. Model selanjutnya diimplementasikan menggunakan bantuan software LINGO 11.0. Hasil implementasi memperlihatkan bahwa model mampu menghasilkan jadwal pegawai yang sekaligus meminimumkan banyaknya pegawai.
Keyword: integer linear programming, pegawai, penjadwalan

Judul: Penjadwalan Petugas Keamanan Menggunakan Integer Linear Programming: Studi Kasus di Institut Pertanian Bogor
Abstrak: One of the problems that often arises in a security management system is the problem of scheduling security officers. A proper scheduling of security officers is required to avoid fatigue on officers, both psychologically and physically which can degrade the performance of the officers. This paper presents an integer linear programming model to establish a timetable for the security personnels. The objective function of this model is to minimize the total load shift of officers on the night shift so that the morning shift has a greater chance to be scheduled without reducing the total days of services. This model is then applied to schedule the security officers on campus of Bogor Agricultural University.
Keyword: minimize the total load., integer linear programming, scheduling, Bogor Agricultural University (IPB)

Judul: Development of Antioxidant Film from Basil Seed (Ocimum citriodourum) Mucilage Incorporated with Thyme Essential Oil.
Abstrak: The objectives of this research was to evaluate the effects of thyme essential oil addition on physical properties and antioxidant activity of lemon basil seed mucilage film. Lemon basil is a common name for the culinary herb (Ocimum citriodourum). This research project investigated the properties of an edible film based on lemon basil seed mucilage (LBSM) incorporated with thyme essential oil (TEO). LBSM (0.4% w/v) films were prepared by adding glycerol as plasticizers at the concentration of 30% w/w based on the weight of LBSM and then incorporated with TEO for antioxidant properties. LBSM films were given different concentrations of TEO (0%, 1%, 2% and 3% v/v) (0% as the control). The result showed that films with 3 % TEO had the highest water vapor permeability (WVP) (3.27±0.38 x10-4g mm/m2d kPa), while the control film showed the lowest WVP (1.36±0.28 x10-4g mm/m2d kPa). Water solubility were decreased with the increase in TEO concentration (p<0.05). 1% TEO films showed the highest tensile strength (5.17±0.54MPa) but lower % elongation at break (11.28±1.86%) compared to the other two films (p<0.05) (excluding the control). Scanning electron microscopy showed that the microstructure of the TEO LBSM films had a critical effect on its physical properties, further supporting the tensile strength and WVP results. The 3% TEO film exhibited the highest radical scavenging activity on DPPH (3.3±0.04 % inhibition) (p<0.05) while the others were very low and had slight difference. Increasing the amount of TEO will increase the antioxidant activity, but further increasing the concentration of TEO will also weaken the physical properties of the film.
Keyword: Lemon basil seed mucilage, edible film, antioxidant, thyme essential oil, film properties