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: Durability of Specific Immunoglobulin (Ig) Y Againts Influenza and Covid-19 in Sunscreen
Abstrak: The benefit of specific immunoglobulin Y (Ig Y) as an active ingredient in personal care products such as sunscreen has not been properly studied. Our study aims to evaluate the reliability of specific IgY against influenza and the COVID-19 virus in a sample sunscreen product. Specific IgY influenza and COVID-19 viruses were inserted in the sample sunscreen at two concentrations of 0.1% and 0.25%. Three treatments were observed: control (C) sunscreen without IgY, treatment 1 (T1) sunscreen with 0.1% IgY, and treatment 2 (T2) sunscreen with 0.25% IgY. Organoleptic observations were carried out to monitor changes in aroma, color, and texture, and sunscreen sampling was done every week for 6 weeks. The durability of IgY was evaluated using an enzyme-linked immunosorbent assay (ELISA) and a neutralization assay. Organoleptic observation from weeks 1 to 6 showed consistency in its aroma, color, and texture. Enzyme-linked immunosorbent assay and neutralization assay (NA) results of the T1 and T2 groups showed negative results except for sample T1 at week 5, which showed a positive result in the Influenza A ELISA. Based on the results, it seems that IgY concentrations of 0.1% or 0.25% were not optimal. However, this negative result might be due to low concentration of the IgY and the presence of beeswax, which inhibits IgY and causes it to dissolve in distilled water, thus preventing it from being detected in the assay.
Keyword: Immunoglobulin Y, Sunscreen, Influenza, COVID-19, Biological Activity