Judul: Rute Dan Jadwal Pesawat Untuk Memenuhi Permintaan Penumpang : Kasus Airasia
Abstrak: Operasi suatu industri penerbangan merupakan suatu permasalahan manajemen yang kompleks. Secara umum, perusahaan dihadapkan pada persoalan dalam memenuhi permintaan calon penumpang dan upaya untuk memaksimumkan keuntungan. Salah satu dari masalahnya adalah bagaimana perusahaan memecahkan menentukan masalah rute armada dan jadwal penerbangan dengan penggunaan jumlah pesawat yang minimum. Rute armada dan jadwal penerbangan adalah aktifitas penting dalam operasi perusahaan penerbangan karena sangat mempengaruhi efisiensi penggunaan pesawat, pembuatan jadwal penerbangan, perawatan pesawat dan penjadwalan awak. Hal tersebut menentukan keuntungan perusahaan, tingkat pelayanan dan kemampuan bersaing di pasar. Proses penjadwalan penerbangan terdiri dari dua tahap yang saling bergantung, 1) tahap pembuatan jadwal dan 2) tahap evaluasi jadwal. Pada tahap pembuatan jadwal dikembangkan konsep jadwal berdasarkan perkiraan permintaan dan penguasaan pasar. Konsep jadwal tersebut diuji selama tahap evaluasi untuk kelayakan operasi, pertimbangan biaya dan performa. Pemeriksaan kelayakan pada tahap evaluasi terutama mencakup hal yang berkaitan dengan rute armada, ukuran armada, jadwal awak dan pengaturan perawatan. Penelitian ini menggunakan teknik jaringan ruang-waktu dalam memformulasikan model untuk masalah rute armada dan jadwal penerbangan. Penyelesaian masalah ini menggunakan software LINGO 8.0 dengan metode Branch and Bound.
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Judul: Optimasi Penjadwalan Armada Pesawat Terbang
Abstrak: One of the common issues faced by airline companies relies on fulfilling passenger demands for Origin-Destination (O-D) routes using all fleet types. This paper presents an optimization model to determine fleet assignment for each flight route in order to minimize total costs. The total costs consist of the operating cost and passenger spill cost. The model is considered as an integer linear programming which is further implemented within the Citilink airlines schedule, and was solved using software Lingo 11.0. The model produced a fleet assignment in order to fulfill demand for all O-Ds with minimum cost.
Keyword: fleet assignment, integer linear programming, optimization

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell