Judul: Analisis dan Evaluasi Infrastruktur Jaringan Nirkabel Berbasiskan Standar IEEE 802.11 (Studi Kasus di Institut Pertanian Bogor)
Abstrak: Infrastruktur jaringan wireless fidelity (WiFi) milik IPB belum dikelola secara optimal saat ini. Hal ini menyebabkan banyaknya interferensi antar perangkat WiFi sehingga area jangkauannya menjadi tidak optimal. Oleh karena itu, diperlukan sebuah rekomendasi rancangan infrastuktur WiFi yang dapat mengoptimalkan kinerja jaringan. Penelitian ini menggunakan dua model desain infrastruktur jaringan WiFi, yaitu model koneksi langsung dan model koneksi bridging/relaying. Pengujian dilakukan dengan menggunakan dua skenario aktivitas pengguna, yaitu diam dan bergerak untuk mengukur tiga variabel kinerja jaringan, yaitu latency, throughput, dan signal-to-noise ratio (SNR). Pada model koneksi langsung dengan skenario kondisi pengguna diam menghasilkan nilai kinerja latency rata-rata 2.5 ms dan model koneksi bridging/relay 165.4 ms. Untuk skenario kondisi pengguna bergerak pada koneksi langsung waktu perpindahan AP rata-rata 2.9 detik dan koneksi bridging/relay 6.2 detik. Sementara itu, untuk hasil pengujian throughput pada koneksi langsung memiliki nilai rata-rata 7.185 Mbps dan koneksi bridging/relay 1.364 Mbps. Dengan hasil yang didapatkan, maka kinerja yang terbaik adalah model koneksi langsung.
Keyword: bridging/relay, interferensi, nirkabel, roaming, WiFi

Judul: Analisis Layanan Internet berdasarkan Kinerja Router terluar IPB
Abstrak: Institut Pertanian Bogor terus melakukan peningkatan alokasi bandwidth setiap tahunnya, tetapi infrastruktur penunjangnya tidak pernah dievaluasi. Hal ini berdampak pada kenyamanan penggunaan layanan internet IPB. Jadi efektifitas router sebagai jembatan penghubung antara ISP dan WAN IPB perlu dikaji ulang agar kualitas jaringan agar tetap baik. Pengambilan data dilakukan berdasarkan ketentuan ITU-T E.500. Data yang dianalisis merupakan data queue yang ada dalam router. Parameter kinerja yang diukur adalah throughput dan utilisasi router. Hasil dari penelitian ini didapat beban puncak pada jaringan internet IPB terjadi pada pukul 14.00 sampai 15.00. Berdasarkan penelitian pada border router diperoleh hasil throughput rataan masukan pada WAN, ISP X, dan ISP Y secara berurutan adalah 120.5 Mbps, 351.4 Mbps, dan 326.4 Mbps, sedangkan throughput rataan keluarannya 688.8Mbps Mbps, 52.8 Mbps, dan 56.6 Mbps. Utilisasi router, didapat ρ = 2.42%, berdasarkan hasil tersebut secara keseluruhan router masih bisa menangani beban kerja dari koneksi IPB. Permasalahan terjadi ketika paket yang menuju link WAN memiliki lalu lintas data yang lebih besar dari yang ditetapkan dan menyababkan terjadinya bottleneck pada link WAN.
Keyword: ITU-T E.500, jam sibuk, queue, router, throughput

Judul: Systematics of Desmos (Annonaceae) in Malesia
Abstrak: Desmos is a woody climbing genus of Annonaceae which has been widely used as traditional medicine in several countries such as China, Indo-China, Thailand, and Peninsular Malaysia to treat dysentery, vertigo, fever, and postpartum. Phylogenetic studies on Desmos showed a close relationship between Desmos and Dasymaschalon. They share similar moniliform monocarpic fruits, but their flowers are different. It has been debated among Annonaceae researchers whether both genera should be treated as the same or distinct genus. Therefore, investigation on the taxonomic delimitation of Desmos species and Dasymaschalon will be necessary. Plastid genome (plastome) identification, leaf epidermal section of Desmos species and Dasymaschalon species, a taxonomic revision of Desmos in Malesia using morphological data, the spatial distribution of Desmos species in Malesia, and morphological and genetic variation in Desmos chinensis population using ISSR marker were used to investigate taxonomic delimitation of Desmos. Plastome study of Desmos chinensis and Dasymaschalon dasymaschalum was carried out to determine the origin, evolution, phylogenomics, and identify marker candidates for Desmos and Dasymaschalon or with other genera in Annonaceae. We discovered that the plastome of Desmos chinensis was circular with the size of 167,677 bp (smaller than Dasymaschalon dasymaschalum), consist of 111 genes, including 78 protein-coding genes, 29 transfer RNAs, and 4 ribosomal RNAs. The plastome showed a typical quadripartite structure, i.e., large single copy (LSC), small single copy (SSC), and two inverted repeats (IRs). The plastome of Dasymaschalon dasymaschalum was 191,488 bp in length, which also exhibited a typical quadripartite structure (LSC, SSC, and two IRs). Desmos chinensis and Dasymaschalon dasymaschalum showed different copies of accD, ndhD, ndhF, rps18, and ycf2. Protein coding genes of rpoB, rpoC1, rbcL, matK, rpl32, infA, and rpl36 were identified based on nucleotide diversity, sequence variability, and parsimony-informative sites. The genes are defined as molecular marker candidates of plastome for phylogenetic, barcoding, and population genetic research. We predicted that Desmos chinensis and Dasymaschalon dasymaschalum separated at ca. 64 million years ago during the Paleocene. Leaf anatomical feature study was carried to support the taxonomic delimitation of interspecific Desmos and intergeneric of Desmos and Dasymaschalon. Leaf anatomy in the paradermal section of 20 taxa (12 species of Desmos, eight species of Dasymaschalon) have been carried out. According to the leaf epidermal section, Desmos and Dasymaschalon are two distinct genera mainly distinguished based on the anticlinal wall undulation of epidermal cells and supported by variation of the crystal type and size. The anticlinal wall undulation of Desmos was almost straight to slightly wavy and never sinuous; meanwhile, Dasymaschalon varies from almost straight to deeply sinusoid. The crystals of Desmos consist of rhombohedral, druse type A, and druse type B crystals, whereas Dasymaschalon has prism, druse type A, druse type B, and druse type C crystals. The recent taxonomic revision using the morphological data was mainly based on the examination of about 1374 specimens from BO, L, WAN, ANDA, SING, SAN, K, P, HUH herbaria. The Desmos species in Malesia consists of eight species: D. acutus, D. chinensis, D. chryseus, D. dunalii, D. pedunculosus, D. subbiglandulosus, two new records: D. lawii and D. macrocarpus, and one
Keyword: Dasymaschalon, Desmoid clade, Magnoliid, plastid genome, phylogenomics analysis