Judul: Analisis Kinerja RSVP dan RTP Header Compression untuk Video Streaming
Abstrak: Video streaming is a real-time application that is sensitive to delays. Some methods like Differentiated Service (DiffServ), Resource Reservation Protocol (RSVP), and Real-time Transport Protocol (RTP) header compression are used to ensure Quality of Service (QoS) of the network to work well. The purpose of this research is to analyze the performance of RSVP and RTP header compression for video streaming. RSVP enables the receiver of a traffic flow to make the resource reservations necessary to ensure that the receiver obtains the desired QoS for the traffic flow. RTP header compression compresses the RTP header which consists of the combined Internet Protocol (IP), User Datagram Protocol (UDP) and RTP segments. Routing protocol is one of the important things to maintain communication within network. The routing protocol used in this research is Enhanced Interior Gateway Routing Protocol (EIGRP). Streaming ran in unicast using the on-demand streaming method. Test was conducted by using actual devices, i.e., five CISCO router 2620XM that is connected by serial cables with a small topology. This research analyzes the performance of RSVP and RTP header compression based on packet loss, throughput, delta and jitter. The result shows that RSVP and RTP header compression are capable of improving the performance of the network for video streaming. RSVP is better than RTP Header compression and works even better while those two methods are integrated.
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Judul: Analisis Pengaruh Video Bit-Rate dan Resolusi Video terhadap Kinerja Live Streaming
Abstrak: The principle of live streaming is to deliver recording media streaming directly from a device to a client who asks, without saving the recording media in to the client’s storage. The quality of live streaming is influenced by several factors, among which are the resolution, video bit-rate and network conditions. This research is expected to give a performance of live streaming technology to limit the resolution and video bit-rate of 802.11 g wireless network for two different players. Video results processed at the broadcaster recording using MPEG-4 H.264 and AAC audio format. The resolutions used are 176x144 pixel, 320x240 pixel and 640x480 pixel. Video bit-rates used are 256 Kbps, 512 Kbps, 768 Kbps and 1024 Kbps. The analysis was done by performing capture streaming service on the server side. The analysis includes the performance parameters of throughput and delay packet. The result is video with resolution 320x240 pixel is the best resolution and is able to adapt to different video bit-rate. However, the result in the network load is not too different both from the broadcasters to the server or from server to the client.
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Judul: Revisi marga Ptychopyxis miquel (Euphorbiaceae) di kawasan Malesia
Abstrak: Ptychopyxis adalah salah satu marga dari 317 marga yang termasuk ke dalam suku Euphorbiaceae. pertama kali dipublikasikan oleh Miquel (1860). Marga ini Marga ini pernah dimasukkan kedalam marga lain, yaitu Podadenia, Mallotus dan Clarorivinia. Fakta tersebut menunjukkan bahwa batasan marga Ptychopyxis belum cukup mantap. Persebaran marga ini menurut Van Welzen (1993) jumpai di Thailand, Indochina dan kawasan Malesia, di seluruhnya ada 23 jenis dan 10 jenis diantaranya terdapat di kawasan Malesia. Marga ini umum berperawakan pohon dan berumah dua, tumbuh di hutan hujan dataran rendah sampai pada ketinggian 1500 m dpl. Penelitian taksonomi yang komprehensif tentang marga ini telah dilakukan oleh Airy Shaw pada tahun 1960; sejak saat itu belum ada penelitian taksonomi yang lebih kompre- hensif, khususnya untuk kawasan Malesia. Kini dengan bertambahnya jumlah spesimen koleksi baru, maka tepatlah kiranya dilakukan revisi marga. Tujuan penelitian ini adalah untuk memberikan batasan marga serta jenis-jenisnya yang termasuk dalam Ptychopyxis selain itu diteliti pula hubungan kekerabatan antar jenis dan keterangan-keterangan..dst
Keyword: Herbarium Bogoriense, Podadenia, Mallotus, Clarorivinia