Judul: Penyelesaian Masalah Crew Pairing Maskapai Penerbangan dengan 0-1 Integer Programming
Abstrak: Crew pairing is a sequence of flights that begins from a crew base and ends at the same crew base that will be served by a member of crew. Determination of crew pairing is one part of the operational cost efficiency efforts on commercial airline. The purpose of this study is to minimize the number of crew pairing and the total waiting time between two flights (i.e., sit time). This problem is formulated as 0-1 Integer Programming. Implementation on the airline of Air Asia with 25 flights schedule within a period of one day provides 9 crew pairing with the total sit time 2075 minutes.
Keyword: crew pairing, crew scheduling, crew, airline

Judul: Optimisasi Penjadwalan Pesawat Terbang Menggunakan Integer Linear Programming: Studi Kasus Maskapai PT Citilink
Abstrak: Salah satu aspek yang terpenting dalam manajemen suatu maskapai penerbangan adalah menentukan jadwal dan rute penerbangan bagi setiap pesawat guna memenuhi kebutuhan pesawat terbang bagi setiap segmen penerbangan dalam seluruh jadwal penerbangan yang sudah ditentukan maskapai penerbangan. Menurut Bazargan (2004) ada empat tahap proses dalam manajemen perencanaan penerbangan, yaitu i) penjadwalan penerbangan, ii) penugasan armada, iii) penentuan rute pesawat terbang, dan iv) penjadwalan kru. Dalam proses pembuatan jadwal dan rute penerbangan bagi setiap pesawat terbang dilakukan melalui tahap penugasan armada dan penentuan rute pesawat terbang. Tahap penugasan armada menentukan jumlah pesawat untuk masing-masing armada yang akan digunakan, serta menentukan base untuk setiap pesawat. Tahap penentuan rute pesawat terbang menentukan rute dan waktu penerbangan untuk setiap pesawat. Karya ilmiah ini menyajikan model optimisasi masing-masing untuk tahap penugasan armada dan penentuan rute pesawat terbang dalam bentuk model integer linear programming (ILP). Model ini diimplementasikan pada kasus maskapai PT Citilink yang memiliki 254 penerbangan pada 24 kota di Indonesia. Hasil implementasi model memberikan jumlah minimum pesawat sebanyak 48 unit yang terdiri dari 41 unit Air Bus 320, 6 unit Boeing 737-300, dan 1 unit Boeing 737-400, dengan total biaya operasional minimum sebesar Rp 14 214 981 000.
Keyword: citilink, integer linear programming, penerbangan, penjadwalan pesawat, penugasan armada, rute pesawat

Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera