Judul: Penjadwalan Perawat Kamar Operasi Menggunakan Pemrograman Integer: Studi Kasus di Rumah Sakit OMNI Internasional Tangerang
Abstrak: A nurse scheduling on operating room problem is often faced by the hospital management. Regulations and limitations of nurse imposed lead to be a determining factor in scheduling. This paper presents an integer programming model to build schedule on operating room nurses which minimizes operational costs by taking into account the constraints associated with the regulation of hospitals and the number of available nurse as an objective function. Implemented model in the OMNI Internasional Hospital Tangerang produces better nurse schedule compared to the schedule created manually
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Judul: Penjadwalan Perawat Rumah Sakit Menggunakan Integer Linear Programming
Abstrak: Dampak dari Pembatasan Sosial Berskala Besar diperlukannya penjadwalan ulang staf/personel dari jadwal yang sudah ada. Penjadwalan perawat merupakan masalah penting bagi rumah sakit, sehingga diperlukan pengelolaan penjadwalan yang tepat. Penjadwalan secara otomatis dapat dilakukan dengan bantuan software seperti LINGO. Dalam karya ilmiah ini, permasalahan penjadwalan dapat dimodelkan sebagai masalah integer linear programming lalu akan dibuat ke dalam 5 skenario berbeda. Fungsi objektifnya adalah meminimumkan biaya keseluruhan yang harus dikeluarkan Rumah Sakit sesuai dengan peraturan atau kendala yang ada di rumah sakit. Penjadwalan dengan lima skenario akan dimasukkan ke dalam proses komputasi dan diselesaikan dengan bantuan software LINGO 18.0, The impact of large-scale social restrictions necessitates rescheduling of staff or personnel from the existing schedule. Nurse scheduling is an important issue for hospitals, so proper scheduling management is needed. Automatic scheduling can be done by software such as LINGO. In this scientific paper, scheduling problems can be modeled as integer linear programming problems and then divided into 5 different scenarios. Its objective function is to reduce the overall costs must be incurred by the hospital with the hospital's regulations or constraints. Scheduling with five scenarios will be included in the computation process and solved with software LINGO 18.0.
Keyword: Hospital, Integer Linear Programming, Nurse Scheduling

Judul: Karakteristik Kimia Kayu Reaksi Ulin (Eusideroxylon zwageri T. et B.)
Abstrak: Reaction wood which formed in hardwood generally has a lower klason lignin content, higher acid soluble lignin content, and higher syringil unit than opposite wood. Ulin wood (E. zwageri) contains high klason lignin and low acid soluble lignin contents which closed to lignin characteristic of softwood. This experimental aimed to study the difference of chemical characteristic of reaction wood (klason lignin content, acid soluble lignin content, and lignin monomer composition) and polysaccharides content which formed in E. zwageri stem. Visually, the reaction wood part was formed in upper side of leaning stem. Klason lignin content in reaction wood part was lower (32.71%) than opposite wood part (33.74%). However, the lowest lignin content was found in the side wood part (28.15%). Lignin of E. zwageri was composed by syringyl and guaiacyl monomer with average of syringil to guaisyl ratio 0,2. Acid soluble lignin content in E. zwageri was very low (0.69%) that positively correlated with the proportion of syringil unit in lignin. Polysaccharide content of reaction wood part (63.66%) was higher than opposite wood part (62.88%), but the highest content polysaccharides presented in the side wood part (64.19%).
Keyword: Polisaccharide, syringil-guaiasyl ratio, lignin, E. zwageri, reaction wood