Judul: Biologi Sycanus annulicornis (Hemiptera: Reduviidae) pada tiga spesies mangsa
Abstrak: Serangga predator merupakan salah satu musuh alami yang dapat mengendalikan serangga hama. Salah satu jenis predator adalah Sycanus annulicornis (Hemiptera:Reduviidae). Penelitian ini dilaksanakan dari bulan Maret-Juni 2003 di Laboratorium Ekologi Serangga, Fakultas Pertan\an, Institut Pertanian Bogor. Penelitian ini bertujuan untuk mengetahui .... ' pengaruh biologi Sycanus annulicornis Hemiptera:Reduviidae) terhadap tiga serangga mangsa. Mangsa terdiri dari tiga jenis yaitu Spodoptera litura, CroCidolqmia pavonana, dan Corcyra cephalonica yang diambil dari lapang, Pengamatan~ dilakukan sejak nimfa menetas hingga menjadi menjadi imago dan meletakkan telur. Pada stadia nimfa ukuran terpanjang pada instar II terdapat pada nimfa yang di beri mangsa C. cephalonica, dan pada instar IV sampai instar V ukuran terpanjang terdapat pada nirnfa yang diberi mangsa S. litura. Pada instar III sampai imago, mangsa tidak berpengaruh nyata pada ukuran panjang Sycanus annulicornis. Jenis mangsa tidak berpengaruh pada lama stadium instar I sampai instar IV, sedangkan pada instar V, nimfa yang diberi mangsa C. cephalonica mengalami lama stadium yang lebih pendek. Jenis mangsa berpengaruh terhadap kematian nimfa. Salah satu penyebab kematian adalah karena terjadinya pemangsaan tehadap nimfa oleh mangsa.
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Judul: Pengaruh Tiga Jenis Mangsa terhadap Biologi Kepik Predator Sycanus annulicornis Dohrn. (Hemiptera: Reduviidae)
Abstrak: The objective of the research was to study the effects of (1) three different spesies of preys on the biology of predator S. annulicornis, (2) ratio of female to male on the fecundity and fertility of the predator, and (3) prey status on the predator behaviors. The research was held at Ecology Laboratory, Departemen Proteksi Tanaman, Fakultas Pertanian, IPB, since July 2005 until June, 2006. Predator S. annulicornis was collected from agricultural field of Kebun Percobaan IPB Sawah Baru and Situ Gede, Darmaga Bogor. Preys used were Corcyra cephalonica Stainton (Lepidoptera: Pyralidae), Tenebrio molitor Linnaeus (Coleoptera: Tenebrionidae), and Spodoptera litura Fabricius (Lepidoptera: Noctuidae), both as dead and alive larvae. Larvae and adult of C. cephalonica was collected from rice warehouse at Cianjur and surroundings, larvae T. molitor from local market at Bogor, while larvae S. litura from soybean fields at Kampus IPB Darmaga. Those preys then were reared in the laboratory. The study revealed that C. cephalonica was the most suitable prey for S. annulicornis. It resulted in the lower mortality rate (17,5%), shorter nymphal period (51,42 days), longer longevity (30,25 days), higher adult weight (0,12 g) and higher ECI value (33,46%). On the other hand, S. litura was unsuitable prey for S. annulicornis. It resulted in higher mortality rate (70%), longer nymphal period (58,31 days), shorter longevity (18,50 days), lower adult weight (0,07 g), and lower ECI value (8,32%). The sex ratio of 1:2 was the most suitable for mass rearing of the predator in laboratory, because it generated highest fecundity (74,14 eggs) and highest fertility (65,14 eggs). Prey given as dead larvae did not affect the predatory behavior of the offsprings.
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Judul: Pengembangan Model Quality of Experience untuk Televisi IPTV secara Empiris
Abstrak: Quality of Experience is closely related to expectations, customer experience and subjective perception of the performance of multimedia communications applications. Quality of Service is limited to the size of the network quality. The initial step in conducting the study is to prepare the IPTV network infrastructure consisting of a central station (headend), local transmission (core network) and a public transmission (access network). The next step is to do the Quality of Service measurement by flowing through IPTV network infrastructure a video format H.264 with a bit rate ranging from 1000 to 8000 kbps. Each node of the network is recording video packet data network (packet loss, delay and jitter). After that, map Quality of Service to Quality of Experience value using the ITU - T G1070. Transmission measurements at the central station (headend) show that the small values of QoS. Packet loss values lower than 0.10%, the value is lower than 32ms delay, and jitter values lower than 5ms. Video QoE value (VQ) ranged between 4 (Good). Stable QoE ensure good network performance. For transmission measurements on the local (core network), with a bit rate of ≥ 2000 kbps, shows that packet loss value is small (≤ 0.10%) and video QoE values ranged between 4 (Good). Average delay of RTP is approximately 60 ms and average jitter of RTP is 16.5 ms giving effect to the choppy video QoE. As for the TCP, it is relatively better because of the small value of QoS. Value of packet loss is approximately 0.0%, average delay is 5 ms and average jitter is 5.2 ms. Fluctuations QoE describe poor network performance to support IPTV services. For the measurement of the transmission to the public (access network) shows that the value of small packet loss (≤ 0.10%), the value of the RTP delay is around 60ms and jitter values of the RTP is 7.2ms. Video QoE value stable range between 4 (Good). Just as the headend, network performance has provided a good guarantee for IPTV services.
Keyword: Quality of Service, Quality of Experience, Mean Opinion Score, IPTV, video streaming, ITU-T G.1070.