Judul: Implementasi Jaringan Peer-to-Peer Tak Terstruktur Menggunakan Protokol JXTA
Abstrak: Internet is useful for communication, exchanging information, and businesses. Most internet network is based on client-server system, which is a centralized network. The server acts as the center of network and has the ability to transfer data as requested by the client. In a client-server system, the network will be down if the server is busy or interrupted. This disadvantage can be solved by Peer-to-Peer (P2P) network. In P2P network, client or “peer” can communicate with other peers without relying on the server. One of the P2P network protocols is JXTA protocol, an open source protocol that can connect mobile devices or computers to P2P network. The objective of this research was to implement the unstructured P2P application by using JXTA protocol and additional peer group. In this research, the features of investigated P2P application were chatting within peer group, searching for files, and downloading files. It was found that these features can only be performed by peers that were directly connected to other peers in the same subnet. Furthermore, this research showed that the highest percentage of overhead file was 10.13% and the percentage of overhead protocol did not exceed 0.5%
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Judul: Simulasi fungsi agregat pada jaringan Peer to Peer (P2P)
Abstrak: Akses terhadap informasi global pada suatu sistem terdistribusi merupakan hal yang sangat penting. Sebagai contoh yaitu informasi mengenai jumlah total free space pada sebuah jaringan basisdata terdistribusi atau jumlah beban rata-rata dan maksimum setiap cluster pada suatu jaringan cluster, yang apabila informasi tersebut diketahui maka beban ideal untuk setiap cluster dapat ditentukan.
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Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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