Judul: Lingkungan Wide Area Network untuk pemrosesan paralel
Abstrak: Kine ja proses pmlel dalam jaringan dapat diukur dengan memperhatikan waktu komputasi dan waktu kornunikasi antar prosesor. Penefitian ini merekomendasikan afgoritma routing, topologi jaringan, ukuran paket clan bandwidth port router agar wakiu komunikasi antar prosesor dalam WAN dapat diminirnalkan sehingga kine ja proses pardel menjadi lebih baik. Penelitian hi d i l h a k a n pada teknologi ethernef menggunakan dua mebik perftorma, yaitu throughput dan delay. Perbandingan pengukuran performa proses p d e l pada ukuran paket 100, 1,000, 10,000 dan 100,000 byte rnernpcrlihatkan bahwa nilai thmughpuf tcrbaik dicapsi pada saat ukuran paket 1,000 byte. Paket yang Iebih btsar dari 1,000 byte membutuhkan waktu pernotongan paket dm penggabungan paket kembali. Paket yang Iebifi kecil dsri 1,000 byte, meski tidak mengalad pernotongan paket, data tersebut &an rnendapatkan overhead dari penambahan header dan ack yang baamya sama pada setiap penginman paket, berajapun data yang dibawa. Perbandingan penykuran performa proses parale1 pada algoritma routing OSPF clan EIGRP dalarn penelitian ini memberikan hasiI yang bervariasi. Penarnbahan ukuran bandwidth port pada router tidak mempertihatkan perbedaan. Seianjutnya, ada perbandingan pengukuran perfama proses paralei pada topalogi linear dm ring pada peneiitian ini juga tidak memperlihatkan perbdaan.
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Judul: Kinerja Protokol Routing dalam Komunikasi Real-time pada Jaringan Berkabel
Abstrak: To reach its destination, different routing protocols are used by routers to determine the path for real time data (voice and video) communications. Each protocol has its own method of doing the routing. This research evaluates the performance of three routing protocols, namely RIPv2, EIGRP, and OSPF, based on two parameters: packet loss and router re-convergence time. Test was conducted by using actual devices, i.e., one CISCO 1841 router and eight CISCO 2620XM routers with a small topology. Video file that is used has a duration of 119.25 seconds with video format MPEG-4 and total bit-rate 87.6 Kbps. To obtain the value of packet loss and router re-convergence time, when the stream running about 1 minute, the network will be impaired by turning off one of the router. The analysis was done by looking at the number of packets captured by sniffer and the log of the router. The result shows that protocol EIGRP has the best performance compared with RIPv2 and OSPF with average time 0.148 second to re-convergence and 40 loss packets.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4