Judul: Perbandingan kualitas layanan pada protokol VOIP H.323 dan SIP
Abstrak: Voice over Internet Protocol (VoIP) adalab suatu teknologi yang dapat mentTiznsmisikan pesan sum melalui jaringan data (internet protocol). Rotokol VolP yang banyak digunakan saat hi adalah H.323 dm SIP. SIP dikembangkan oleh Internet Engineering Task Force's (ETF) yang dituangkan dalam RFC2543 dm H.323 dikembangkan oleh International Telecommzrnication Union (ITU-T). Perbedaan yang mendasar mtara kedua protokol tersebut adalah format data yang ditransmisikan, H.323 menggunakan format binary, sedangkan SIP menggunakan format text (ASCII).
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Judul: Peningkatan Kualitas Layanan VoIP pada Jaringan MPLS Melalui Pengaturan Prioritas
Abstrak: Multi Protocol Label Switch (MPLS) is a method of sending data packets through a network by Label Switching concept. This concept is implemented by adding an independent and unique label in a row of data packet (a packet of Internet Protocol). The function of this label is to graft and to search for a path in the network. Applications that passed through the MPLS network are vary including VoIP, email, ping, internet browsing, etc. With the existence of this labeling function, MPLS can give priority to scale applications to pass through. This research aims to improve the performance of MPLS networks using priority settings on VoIP services. The results obtained when the VoIP service priority settings applied to the MPLS network is that it decreases the ping delay value of 44.75%. And also, the quality of service becomes more stable due to impairment of the jitter standard deviation of 73.44%.
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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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